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+//========================================================================
+//
+// TextOutputDev.cc
+//
+// Copyright 1997-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+//========================================================================
+//
+// Modified under the Poppler project - http://poppler.freedesktop.org
+//
+// All changes made under the Poppler project to this file are licensed
+// under GPL version 2 or later
+//
+// Copyright (C) 2005-2007 Kristian Høgsberg <krh@redhat.com>
+// Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
+// Copyright (C) 2006-2008, 2011-2013 Carlos Garcia Campos <carlosgc@gnome.org>
+// Copyright (C) 2006, 2007, 2013 Ed Catmur <ed@catmur.co.uk>
+// Copyright (C) 2006 Jeff Muizelaar <jeff@infidigm.net>
+// Copyright (C) 2007, 2008, 2012 Adrian Johnson <ajohnson@redneon.com>
+// Copyright (C) 2008 Koji Otani <sho@bbr.jp>
+// Copyright (C) 2008, 2010-2012, 2014, 2015 Albert Astals Cid <aacid@kde.org>
+// Copyright (C) 2008 Pino Toscano <pino@kde.org>
+// Copyright (C) 2008, 2010 Hib Eris <hib@hiberis.nl>
+// Copyright (C) 2009 Ross Moore <ross@maths.mq.edu.au>
+// Copyright (C) 2009 Kovid Goyal <kovid@kovidgoyal.net>
+// Copyright (C) 2010 Brian Ewins <brian.ewins@gmail.com>
+// Copyright (C) 2010 Marek Kasik <mkasik@redhat.com>
+// Copyright (C) 2010 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
+// Copyright (C) 2011 Sam Liao <phyomh@gmail.com>
+// Copyright (C) 2012 Horst Prote <prote@fmi.uni-stuttgart.de>
+// Copyright (C) 2012, 2013-2015 Jason Crain <jason@aquaticape.us>
+// Copyright (C) 2012 Peter Breitenlohner <peb@mppmu.mpg.de>
+// Copyright (C) 2013 José Aliste <jaliste@src.gnome.org>
+// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
+// Copyright (C) 2013 Ed Catmur <ed@catmur.co.uk>
+//
+// To see a description of the changes please see the Changelog file that
+// came with your tarball or type make ChangeLog if you are building from git
+//
+//========================================================================
+
+#include <config.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <math.h>
+#include <float.h>
+#include <ctype.h>
+#ifdef _WIN32
+#include <fcntl.h> // for O_BINARY
+#include <io.h> // for setmode
+#endif
+#include "goo/gmem.h"
+#include "goo/GooString.h"
+#include "goo/GooList.h"
+#include "poppler-config.h"
+#include "Error.h"
+#include "GlobalParams.h"
+#include "UnicodeMap.h"
+#include "UnicodeTypeTable.h"
+#include "Link.h"
+#include "TextOutputDev.h"
+#include "Page.h"
+#include "Annot.h"
+#include "UTF.h"
+
+#ifdef MACOS
+// needed for setting type/creator of MacOS files
+#include "ICSupport.h"
+#endif
+
+//------------------------------------------------------------------------
+// parameters
+//------------------------------------------------------------------------
+
+// Each bucket in a text pool includes baselines within a range of
+// this many points.
+#define textPoolStep 4
+
+// Inter-character space width which will cause addChar to start a new
+// word.
+#define minWordBreakSpace 0.1
+
+// Negative inter-character space width, i.e., overlap, which will
+// cause addChar to start a new word.
+#define minDupBreakOverlap 0.2
+
+// Max distance between baselines of two lines within a block, as a
+// fraction of the font size.
+#define maxLineSpacingDelta 1.5
+
+// Max difference in primary font sizes on two lines in the same
+// block. Delta1 is used when examining new lines above and below the
+// current block; delta2 is used when examining text that overlaps the
+// current block; delta3 is used when examining text to the left and
+// right of the current block.
+#define maxBlockFontSizeDelta1 0.05
+#define maxBlockFontSizeDelta2 0.6
+#define maxBlockFontSizeDelta3 0.2
+
+// Max difference in font sizes inside a word.
+#define maxWordFontSizeDelta 0.05
+
+// Maximum distance between baselines of two words on the same line,
+// e.g., distance between subscript or superscript and the primary
+// baseline, as a fraction of the font size.
+#define maxIntraLineDelta 0.5
+
+// Minimum inter-word spacing, as a fraction of the font size. (Only
+// used for raw ordering.)
+#define minWordSpacing 0.15
+
+// Maximum inter-word spacing, as a fraction of the font size.
+#define maxWordSpacing 1.5
+
+// Maximum horizontal spacing which will allow a word to be pulled
+// into a block.
+#define minColSpacing1 0.3
+
+// Minimum spacing between columns, as a fraction of the font size.
+#define minColSpacing2 1.0
+
+// Maximum vertical spacing between blocks within a flow, as a
+// multiple of the font size.
+#define maxBlockSpacing 2.5
+
+// Minimum spacing between characters within a word, as a fraction of
+// the font size.
+#define minCharSpacing -0.5
+
+// Maximum spacing between characters within a word, as a fraction of
+// the font size, when there is no obvious extra-wide character
+// spacing.
+#define maxCharSpacing 0.03
+
+// When extra-wide character spacing is detected, the inter-character
+// space threshold is set to the minimum inter-character space
+// multiplied by this constant.
+#define maxWideCharSpacingMul 1.3
+
+// Upper limit on spacing between characters in a word.
+#define maxWideCharSpacing 0.4
+
+// Max difference in primary,secondary coordinates (as a fraction of
+// the font size) allowed for duplicated text (fake boldface, drop
+// shadows) which is to be discarded.
+#define dupMaxPriDelta 0.1
+#define dupMaxSecDelta 0.2
+
+// Max width of underlines (in points).
+#define maxUnderlineWidth 3
+
+// Min distance between baseline and underline (in points).
+//~ this should be font-size-dependent
+#define minUnderlineGap -2
+
+// Max distance between baseline and underline (in points).
+//~ this should be font-size-dependent
+#define maxUnderlineGap 4
+
+// Max horizontal distance between edge of word and start of underline
+// (in points).
+//~ this should be font-size-dependent
+#define underlineSlack 1
+
+// Max distance between edge of text and edge of link border
+#define hyperlinkSlack 2
+
+// Max distance between characters when combining a base character and
+// combining character
+#define combMaxMidDelta 0.3
+#define combMaxBaseDelta 0.4
+
+//------------------------------------------------------------------------
+// TextUnderline
+//------------------------------------------------------------------------
+
+class TextUnderline {
+public:
+
+ TextUnderline(double x0A, double y0A, double x1A, double y1A)
+ { x0 = x0A; y0 = y0A; x1 = x1A; y1 = y1A; horiz = y0 == y1; }
+ ~TextUnderline() {}
+
+ double x0, y0, x1, y1;
+ GBool horiz;
+};
+
+//------------------------------------------------------------------------
+// TextLink
+//------------------------------------------------------------------------
+
+class TextLink {
+public:
+
+ TextLink(int xMinA, int yMinA, int xMaxA, int yMaxA, AnnotLink *linkA)
+ { xMin = xMinA; yMin = yMinA; xMax = xMaxA; yMax = yMaxA; link = linkA; }
+ ~TextLink() {}
+
+ int xMin, yMin, xMax, yMax;
+ AnnotLink *link;
+};
+
+//------------------------------------------------------------------------
+// TextFontInfo
+//------------------------------------------------------------------------
+
+TextFontInfo::TextFontInfo(GfxState *state) {
+ gfxFont = state->getFont();
+ if (gfxFont)
+ gfxFont->incRefCnt();
+#if TEXTOUT_WORD_LIST
+ fontName = (gfxFont && gfxFont->getName()) ? gfxFont->getName()->copy()
+ : (GooString *)NULL;
+ flags = gfxFont ? gfxFont->getFlags() : 0;
+#endif
+}
+
+TextFontInfo::~TextFontInfo() {
+ if (gfxFont)
+ gfxFont->decRefCnt();
+#if TEXTOUT_WORD_LIST
+ if (fontName) {
+ delete fontName;
+ }
+#endif
+}
+
+GBool TextFontInfo::matches(GfxState *state) {
+ return state->getFont() == gfxFont;
+}
+
+GBool TextFontInfo::matches(TextFontInfo *fontInfo) {
+ return gfxFont == fontInfo->gfxFont;
+}
+
+double TextFontInfo::getAscent() {
+ return gfxFont ? gfxFont->getAscent() : 0.95;
+}
+
+double TextFontInfo::getDescent() {
+ return gfxFont ? gfxFont->getDescent() : -0.35;
+}
+
+int TextFontInfo::getWMode() {
+ return gfxFont ? gfxFont->getWMode() : 0;
+}
+
+//------------------------------------------------------------------------
+// TextWord
+//------------------------------------------------------------------------
+
+TextWord::TextWord(GfxState *state, int rotA, double fontSizeA) {
+ rot = rotA;
+ fontSize = fontSizeA;
+ text = NULL;
+ charcode = NULL;
+ edge = NULL;
+ charPos = NULL;
+ font = NULL;
+ textMat = NULL;
+ len = size = 0;
+ spaceAfter = gFalse;
+ next = NULL;
+
+#if TEXTOUT_WORD_LIST
+ GfxRGB rgb;
+
+ if ((state->getRender() & 3) == 1) {
+ state->getStrokeRGB(&rgb);
+ } else {
+ state->getFillRGB(&rgb);
+ }
+ colorR = colToDbl(rgb.r);
+ colorG = colToDbl(rgb.g);
+ colorB = colToDbl(rgb.b);
+#endif
+
+ underlined = gFalse;
+ link = NULL;
+}
+
+TextWord::~TextWord() {
+ gfree(text);
+ gfree(charcode);
+ gfree(edge);
+ gfree(charPos);
+ gfree(font);
+ gfree(textMat);
+}
+
+void TextWord::addChar(GfxState *state, TextFontInfo *fontA, double x, double y,
+ double dx, double dy, int charPosA, int charLen,
+ CharCode c, Unicode u, const Matrix &textMatA) {
+ ensureCapacity(len+1);
+ text[len] = u;
+ charcode[len] = c;
+ charPos[len] = charPosA;
+ charPos[len + 1] = charPosA + charLen;
+ font[len] = fontA;
+ textMat[len] = textMatA;
+
+ if (len == 0)
+ setInitialBounds(fontA, x, y);
+
+ if (wMode) { // vertical writing mode
+ // NB: the rotation value has been incremented by 1 (in
+ // TextPage::beginWord()) for vertical writing mode
+ switch (rot) {
+ case 0:
+ edge[len] = x - fontSize;
+ xMax = edge[len+1] = x;
+ break;
+ case 1:
+ edge[len] = y - fontSize;
+ yMax = edge[len+1] = y;
+ break;
+ case 2:
+ edge[len] = x + fontSize;
+ xMin = edge[len+1] = x;
+ break;
+ case 3:
+ edge[len] = y + fontSize;
+ yMin = edge[len+1] = y;
+ break;
+ }
+ } else { // horizontal writing mode
+ switch (rot) {
+ case 0:
+ edge[len] = x;
+ xMax = edge[len+1] = x + dx;
+ break;
+ case 1:
+ edge[len] = y;
+ yMax = edge[len+1] = y + dy;
+ break;
+ case 2:
+ edge[len] = x;
+ xMin = edge[len+1] = x + dx;
+ break;
+ case 3:
+ edge[len] = y;
+ yMin = edge[len+1] = y + dy;
+ break;
+ }
+ }
+ ++len;
+}
+
+void TextWord::setInitialBounds(TextFontInfo *fontA, double x, double y) {
+ double ascent = fontA->getAscent() * fontSize;
+ double descent = fontA->getDescent() * fontSize;
+ wMode = fontA->getWMode();
+
+ if (wMode) { // vertical writing mode
+ // NB: the rotation value has been incremented by 1 (in
+ // TextPage::beginWord()) for vertical writing mode
+ switch (rot) {
+ case 0:
+ xMin = x - fontSize;
+ yMin = y - fontSize;
+ yMax = y;
+ base = y;
+ break;
+ case 1:
+ xMin = x;
+ yMin = y - fontSize;
+ xMax = x + fontSize;
+ base = x;
+ break;
+ case 2:
+ yMin = y;
+ xMax = x + fontSize;
+ yMax = y + fontSize;
+ base = y;
+ break;
+ case 3:
+ xMin = x - fontSize;
+ xMax = x;
+ yMax = y + fontSize;
+ base = x;
+ break;
+ }
+ } else { // horizontal writing mode
+ switch (rot) {
+ case 0:
+ xMin = x;
+ yMin = y - ascent;
+ yMax = y - descent;
+ if (yMin == yMax) {
+ // this is a sanity check for a case that shouldn't happen -- but
+ // if it does happen, we want to avoid dividing by zero later
+ yMin = y;
+ yMax = y + 1;
+ }
+ base = y;
+ break;
+ case 1:
+ xMin = x + descent;
+ yMin = y;
+ xMax = x + ascent;
+ if (xMin == xMax) {
+ // this is a sanity check for a case that shouldn't happen -- but
+ // if it does happen, we want to avoid dividing by zero later
+ xMin = x;
+ xMax = x + 1;
+ }
+ base = x;
+ break;
+ case 2:
+ yMin = y + descent;
+ xMax = x;
+ yMax = y + ascent;
+ if (yMin == yMax) {
+ // this is a sanity check for a case that shouldn't happen -- but
+ // if it does happen, we want to avoid dividing by zero later
+ yMin = y;
+ yMax = y + 1;
+ }
+ base = y;
+ break;
+ case 3:
+ xMin = x - ascent;
+ xMax = x - descent;
+ yMax = y;
+ if (xMin == xMax) {
+ // this is a sanity check for a case that shouldn't happen -- but
+ // if it does happen, we want to avoid dividing by zero later
+ xMin = x;
+ xMax = x + 1;
+ }
+ base = x;
+ break;
+ }
+ }
+}
+
+void TextWord::ensureCapacity(int capacity) {
+ if (capacity > size) {
+ size = std::max(size + 16, capacity);
+ text = (Unicode *)greallocn(text, size, sizeof(Unicode));
+ charcode = (CharCode *)greallocn(charcode, (size + 1), sizeof(CharCode));
+ edge = (double *)greallocn(edge, (size + 1), sizeof(double));
+ charPos = (int *)greallocn(charPos, size + 1, sizeof(int));
+ font = (TextFontInfo **)greallocn(font, size, sizeof(TextFontInfo *));
+ textMat = (Matrix *)greallocn(textMat, size, sizeof(Matrix));
+ }
+}
+
+struct CombiningTable {
+ Unicode base;
+ Unicode comb;
+};
+
+static struct CombiningTable combiningTable[] = {
+ {0x0060, 0x0300}, // grave
+ {0x00a8, 0x0308}, // dieresis
+ {0x00af, 0x0304}, // macron
+ {0x00b4, 0x0301}, // acute
+ {0x00b8, 0x0327}, // cedilla
+ {0x02c6, 0x0302}, // circumflex
+ {0x02c7, 0x030c}, // caron
+ {0x02d8, 0x0306}, // breve
+ {0x02d9, 0x0307}, // dotaccent
+ {0x02da, 0x030a}, // ring
+ {0x02dc, 0x0303}, // tilde
+ {0x02dd, 0x030b} // hungarumlaut (double acute accent)
+};
+
+// returning combining versions of characters
+Unicode getCombiningChar(Unicode u) {
+ int len = sizeof(combiningTable) / sizeof(combiningTable[0]);
+ for (int i = 0; i < len; ++i) {
+ if (u == combiningTable[i].base)
+ return combiningTable[i].comb;
+ }
+ return 0;
+}
+
+GBool TextWord::addCombining(GfxState *state, TextFontInfo *fontA, double fontSizeA, double x, double y,
+ double dx, double dy, int charPosA, int charLen,
+ CharCode c, Unicode u, const Matrix &textMatA) {
+ if (len == 0 || wMode != 0 || fontA->getWMode() != 0)
+ return gFalse;
+
+ Unicode cCurrent = getCombiningChar(u);
+ Unicode cPrev = getCombiningChar(text[len-1]);
+ double edgeMid = (edge[len-1] + edge[len]) / 2;
+ double charMid, maxScaledMidDelta, charBase, maxScaledBaseDelta;
+
+ if (cCurrent != 0 && unicodeTypeAlphaNum(text[len-1])) {
+ // Current is a combining character, previous is base character
+ maxScaledMidDelta = fabs(edge[len] - edge[len-1]) * combMaxMidDelta;
+ charMid = charBase = maxScaledBaseDelta = 0;
+
+ // Test if characters overlap
+ if (rot == 0 || rot == 2) {
+ charMid = x + (dx / 2);
+ charBase = y;
+ maxScaledBaseDelta = (yMax - yMin) * combMaxBaseDelta;
+ } else {
+ charMid = y + (dy / 2);
+ charBase = x;
+ maxScaledBaseDelta = (xMax - xMin) * combMaxBaseDelta;
+ }
+
+ if (fabs(charMid - edgeMid) >= maxScaledMidDelta ||
+ fabs(charBase - base) >= maxScaledBaseDelta)
+ return gFalse;
+
+ // Add character, but don't adjust edge / bounding box because
+ // combining character's positioning could be odd.
+ ensureCapacity(len+1);
+ text[len] = cCurrent;
+ charcode[len] = c;
+ charPos[len] = charPosA;
+ charPos[len+1] = charPosA + charLen;
+ font[len] = fontA;
+ textMat[len] = textMatA;
+ edge[len+1] = edge[len];
+ edge[len] = (edge[len+1] + edge[len-1]) / 2;
+ ++len;
+ return gTrue;
+ }
+
+ if (cPrev != 0 && unicodeTypeAlphaNum(u)) {
+ // Previous is a combining character, current is base character
+ maxScaledBaseDelta = (fontA->getAscent() - fontA->getDescent()) * fontSizeA * combMaxBaseDelta;
+ charMid = charBase = maxScaledMidDelta = 0;
+
+ // Test if characters overlap
+ if (rot == 0 || rot == 2) {
+ charMid = x + (dx / 2);
+ charBase = y;
+ maxScaledMidDelta = fabs(dx * combMaxMidDelta);
+ } else {
+ charMid = y + (dy / 2);
+ charBase = x;
+ maxScaledMidDelta = fabs(dy * combMaxMidDelta);
+ }
+
+ if (fabs(charMid - edgeMid) >= maxScaledMidDelta ||
+ fabs(charBase - base) >= maxScaledBaseDelta)
+ return gFalse;
+
+ // move combining character to after base character
+ ensureCapacity(len+1);
+ fontSize = fontSizeA;
+ text[len] = cPrev;
+ charcode[len] = charcode[len-1];
+ charPos[len] = charPosA;
+ charPos[len+1] = charPosA + charLen;
+ font[len] = font[len-1];
+ textMat[len] = textMat[len-1];
+
+ text[len-1] = u;
+ charcode[len-1] = c;
+ font[len-1] = fontA;
+ textMat[len-1] = textMatA;
+
+ if (len == 1)
+ setInitialBounds(fontA, x, y);
+
+ // Updated edges / bounding box because we changed the base
+ // character.
+ if (wMode) {
+ switch (rot) {
+ case 0:
+ edge[len-1] = x - fontSize;
+ xMax = edge[len+1] = x;
+ break;
+ case 1:
+ edge[len-1] = y - fontSize;
+ yMax = edge[len+1] = y;
+ break;
+ case 2:
+ edge[len-1] = x + fontSize;
+ xMin = edge[len+1] = x;
+ break;
+ case 3:
+ edge[len-1] = y + fontSize;
+ yMin = edge[len+1] = y;
+ break;
+ }
+ } else {
+ switch (rot) {
+ case 0:
+ edge[len-1] = x;
+ xMax = edge[len+1] = x + dx;
+ break;
+ case 1:
+ edge[len-1] = y;
+ yMax = edge[len+1] = y + dy;
+ break;
+ case 2:
+ edge[len-1] = x;
+ xMin = edge[len+1] = x + dx;
+ break;
+ case 3:
+ edge[len-1] = y;
+ yMin = edge[len+1] = y + dy;
+ break;
+ }
+ }
+
+ edge[len] = (edge[len+1] + edge[len-1]) / 2;
+ ++len;
+ return gTrue;
+ }
+ return gFalse;
+}
+
+void TextWord::merge(TextWord *word) {
+ int i;
+
+ if (word->xMin < xMin) {
+ xMin = word->xMin;
+ }
+ if (word->yMin < yMin) {
+ yMin = word->yMin;
+ }
+ if (word->xMax > xMax) {
+ xMax = word->xMax;
+ }
+ if (word->yMax > yMax) {
+ yMax = word->yMax;
+ }
+ ensureCapacity(len + word->len);
+ for (i = 0; i < word->len; ++i) {
+ text[len + i] = word->text[i];
+ charcode[len + i] = word->charcode[i];
+ edge[len + i] = word->edge[i];
+ charPos[len + i] = word->charPos[i];
+ font[len + i] = word->font[i];
+ textMat[len + i] = word->textMat[i];
+ }
+ edge[len + word->len] = word->edge[word->len];
+ charPos[len + word->len] = word->charPos[word->len];
+ len += word->len;
+}
+
+inline int TextWord::primaryCmp(TextWord *word) {
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ cmp = xMin - word->xMin;
+ break;
+ case 1:
+ cmp = yMin - word->yMin;
+ break;
+ case 2:
+ cmp = word->xMax - xMax;
+ break;
+ case 3:
+ cmp = word->yMax - yMax;
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+double TextWord::primaryDelta(TextWord *word) {
+ double delta;
+
+ delta = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ delta = word->xMin - xMax;
+ break;
+ case 1:
+ delta = word->yMin - yMax;
+ break;
+ case 2:
+ delta = xMin - word->xMax;
+ break;
+ case 3:
+ delta = yMin - word->yMax;
+ break;
+ }
+ return delta;
+}
+
+int TextWord::cmpYX(const void *p1, const void *p2) {
+ TextWord *word1 = *(TextWord **)p1;
+ TextWord *word2 = *(TextWord **)p2;
+ double cmp;
+
+ cmp = word1->yMin - word2->yMin;
+ if (cmp == 0) {
+ cmp = word1->xMin - word2->xMin;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+#if TEXTOUT_WORD_LIST
+
+GooString *TextWord::getText() {
+ GooString *s;
+ UnicodeMap *uMap;
+ char buf[8];
+ int n, i;
+
+ s = new GooString();
+ if (!(uMap = globalParams->getTextEncoding())) {
+ return s;
+ }
+ for (i = 0; i < len; ++i) {
+ n = uMap->mapUnicode(text[i], buf, sizeof(buf));
+ s->append(buf, n);
+ }
+ uMap->decRefCnt();
+ return s;
+}
+
+void TextWord::getCharBBox(int charIdx, double *xMinA, double *yMinA,
+ double *xMaxA, double *yMaxA) {
+ if (charIdx < 0 || charIdx >= len) {
+ return;
+ }
+ switch (rot) {
+ case 0:
+ *xMinA = edge[charIdx];
+ *xMaxA = edge[charIdx + 1];
+ *yMinA = yMin;
+ *yMaxA = yMax;
+ break;
+ case 1:
+ *xMinA = xMin;
+ *xMaxA = xMax;
+ *yMinA = edge[charIdx];
+ *yMaxA = edge[charIdx + 1];
+ break;
+ case 2:
+ *xMinA = edge[charIdx + 1];
+ *xMaxA = edge[charIdx];
+ *yMinA = yMin;
+ *yMaxA = yMax;
+ break;
+ case 3:
+ *xMinA = xMin;
+ *xMaxA = xMax;
+ *yMinA = edge[charIdx + 1];
+ *yMaxA = edge[charIdx];
+ break;
+ }
+}
+
+#endif // TEXTOUT_WORD_LIST
+
+//------------------------------------------------------------------------
+// TextPool
+//------------------------------------------------------------------------
+
+TextPool::TextPool() {
+ minBaseIdx = 0;
+ maxBaseIdx = -1;
+ pool = NULL;
+ cursor = NULL;
+ cursorBaseIdx = -1;
+}
+
+TextPool::~TextPool() {
+ int baseIdx;
+ TextWord *word, *word2;
+
+ for (baseIdx = minBaseIdx; baseIdx <= maxBaseIdx; ++baseIdx) {
+ for (word = pool[baseIdx - minBaseIdx]; word; word = word2) {
+ word2 = word->next;
+ delete word;
+ }
+ }
+ gfree(pool);
+}
+
+int TextPool::getBaseIdx(double base) {
+ int baseIdx;
+
+ baseIdx = (int)(base / textPoolStep);
+ if (baseIdx < minBaseIdx) {
+ return minBaseIdx;
+ }
+ if (baseIdx > maxBaseIdx) {
+ return maxBaseIdx;
+ }
+ return baseIdx;
+}
+
+void TextPool::addWord(TextWord *word) {
+ TextWord **newPool;
+ int wordBaseIdx, newMinBaseIdx, newMaxBaseIdx, baseIdx;
+ TextWord *w0, *w1;
+
+ // expand the array if needed
+ if (unlikely((word->base / textPoolStep) > INT_MAX)) {
+ error(errSyntaxWarning, -1, "word->base / textPoolStep > INT_MAX");
+ return;
+ }
+ wordBaseIdx = (int)(word->base / textPoolStep);
+ if (minBaseIdx > maxBaseIdx) {
+ minBaseIdx = wordBaseIdx - 128;
+ maxBaseIdx = wordBaseIdx + 128;
+ pool = (TextWord **)gmallocn(maxBaseIdx - minBaseIdx + 1,
+ sizeof(TextWord *));
+ for (baseIdx = minBaseIdx; baseIdx <= maxBaseIdx; ++baseIdx) {
+ pool[baseIdx - minBaseIdx] = NULL;
+ }
+ } else if (wordBaseIdx < minBaseIdx) {
+ newMinBaseIdx = wordBaseIdx - 128;
+ newPool = (TextWord **)gmallocn(maxBaseIdx - newMinBaseIdx + 1,
+ sizeof(TextWord *));
+ for (baseIdx = newMinBaseIdx; baseIdx < minBaseIdx; ++baseIdx) {
+ newPool[baseIdx - newMinBaseIdx] = NULL;
+ }
+ memcpy(&newPool[minBaseIdx - newMinBaseIdx], pool,
+ (maxBaseIdx - minBaseIdx + 1) * sizeof(TextWord *));
+ gfree(pool);
+ pool = newPool;
+ minBaseIdx = newMinBaseIdx;
+ } else if (wordBaseIdx > maxBaseIdx) {
+ newMaxBaseIdx = wordBaseIdx + 128;
+ pool = (TextWord **)greallocn(pool, newMaxBaseIdx - minBaseIdx + 1,
+ sizeof(TextWord *));
+ for (baseIdx = maxBaseIdx + 1; baseIdx <= newMaxBaseIdx; ++baseIdx) {
+ pool[baseIdx - minBaseIdx] = NULL;
+ }
+ maxBaseIdx = newMaxBaseIdx;
+ }
+
+ // insert the new word
+ if (cursor && wordBaseIdx == cursorBaseIdx &&
+ word->primaryCmp(cursor) >= 0) {
+ w0 = cursor;
+ w1 = cursor->next;
+ } else {
+ w0 = NULL;
+ w1 = pool[wordBaseIdx - minBaseIdx];
+ }
+ for (; w1 && word->primaryCmp(w1) > 0; w0 = w1, w1 = w1->next) ;
+ word->next = w1;
+ if (w0) {
+ w0->next = word;
+ } else {
+ pool[wordBaseIdx - minBaseIdx] = word;
+ }
+ cursor = word;
+ cursorBaseIdx = wordBaseIdx;
+}
+
+//------------------------------------------------------------------------
+// TextLine
+//------------------------------------------------------------------------
+
+TextLine::TextLine(TextBlock *blkA, int rotA, double baseA) {
+ blk = blkA;
+ rot = rotA;
+ base = baseA;
+ words = lastWord = NULL;
+ text = NULL;
+ edge = NULL;
+ col = NULL;
+ len = 0;
+ convertedLen = 0;
+ hyphenated = gFalse;
+ next = NULL;
+ xMin = yMin = 0;
+ xMax = yMax = -1;
+ normalized = NULL;
+ normalized_len = 0;
+ normalized_idx = NULL;
+}
+
+TextLine::~TextLine() {
+ TextWord *word;
+
+ while (words) {
+ word = words;
+ words = words->next;
+ delete word;
+ }
+ gfree(text);
+ gfree(edge);
+ gfree(col);
+ if (normalized) {
+ gfree(normalized);
+ gfree(normalized_idx);
+ }
+}
+
+void TextLine::addWord(TextWord *word) {
+ if (lastWord) {
+ lastWord->next = word;
+ } else {
+ words = word;
+ }
+ lastWord = word;
+
+ if (xMin > xMax) {
+ xMin = word->xMin;
+ xMax = word->xMax;
+ yMin = word->yMin;
+ yMax = word->yMax;
+ } else {
+ if (word->xMin < xMin) {
+ xMin = word->xMin;
+ }
+ if (word->xMax > xMax) {
+ xMax = word->xMax;
+ }
+ if (word->yMin < yMin) {
+ yMin = word->yMin;
+ }
+ if (word->yMax > yMax) {
+ yMax = word->yMax;
+ }
+ }
+}
+
+double TextLine::primaryDelta(TextLine *line) {
+ double delta;
+
+ delta = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ delta = line->xMin - xMax;
+ break;
+ case 1:
+ delta = line->yMin - yMax;
+ break;
+ case 2:
+ delta = xMin - line->xMax;
+ break;
+ case 3:
+ delta = yMin - line->yMax;
+ break;
+ }
+ return delta;
+}
+
+int TextLine::primaryCmp(TextLine *line) {
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ cmp = xMin - line->xMin;
+ break;
+ case 1:
+ cmp = yMin - line->yMin;
+ break;
+ case 2:
+ cmp = line->xMax - xMax;
+ break;
+ case 3:
+ cmp = line->yMax - yMax;
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextLine::secondaryCmp(TextLine *line) {
+ double cmp;
+
+ cmp = (rot == 0 || rot == 3) ? base - line->base : line->base - base;
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextLine::cmpYX(TextLine *line) {
+ int cmp;
+
+ if ((cmp = secondaryCmp(line))) {
+ return cmp;
+ }
+ return primaryCmp(line);
+}
+
+int TextLine::cmpXY(const void *p1, const void *p2) {
+ TextLine *line1 = *(TextLine **)p1;
+ TextLine *line2 = *(TextLine **)p2;
+ int cmp;
+
+ if ((cmp = line1->primaryCmp(line2))) {
+ return cmp;
+ }
+ return line1->secondaryCmp(line2);
+}
+
+void TextLine::coalesce(UnicodeMap *uMap) {
+ TextWord *word0, *word1;
+ double space, delta, minSpace;
+ GBool isUnicode;
+ char buf[8];
+ int i, j;
+
+ if (words->next) {
+
+ // compute the inter-word space threshold
+ if (words->len > 1 || words->next->len > 1) {
+ minSpace = 0;
+ } else {
+ minSpace = words->primaryDelta(words->next);
+ for (word0 = words->next, word1 = word0->next;
+ word1 && minSpace > 0;
+ word0 = word1, word1 = word0->next) {
+ if (word1->len > 1) {
+ minSpace = 0;
+ }
+ delta = word0->primaryDelta(word1);
+ if (delta < minSpace) {
+ minSpace = delta;
+ }
+ }
+ }
+ if (minSpace <= 0) {
+ space = maxCharSpacing * words->fontSize;
+ } else {
+ space = maxWideCharSpacingMul * minSpace;
+ if (space > maxWideCharSpacing * words->fontSize) {
+ space = maxWideCharSpacing * words->fontSize;
+ }
+ }
+
+ // merge words
+ word0 = words;
+ word1 = words->next;
+ while (word1) {
+ if (word0->primaryDelta(word1) >= space) {
+ word0->spaceAfter = gTrue;
+ word0 = word1;
+ word1 = word1->next;
+ } else if (word0->font[word0->len - 1] == word1->font[0] &&
+ word0->underlined == word1->underlined &&
+ fabs(word0->fontSize - word1->fontSize) <
+ maxWordFontSizeDelta * words->fontSize &&
+ word1->charPos[0] == word0->charPos[word0->len]) {
+ word0->merge(word1);
+ word0->next = word1->next;
+ delete word1;
+ word1 = word0->next;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+
+ // build the line text
+ isUnicode = uMap ? uMap->isUnicode() : gFalse;
+ len = 0;
+ for (word1 = words; word1; word1 = word1->next) {
+ len += word1->len;
+ if (word1->spaceAfter) {
+ ++len;
+ }
+ }
+ text = (Unicode *)gmallocn(len, sizeof(Unicode));
+ edge = (double *)gmallocn(len + 1, sizeof(double));
+ i = 0;
+ for (word1 = words; word1; word1 = word1->next) {
+ for (j = 0; j < word1->len; ++j) {
+ text[i] = word1->text[j];
+ edge[i] = word1->edge[j];
+ ++i;
+ }
+ edge[i] = word1->edge[word1->len];
+ if (word1->spaceAfter) {
+ text[i] = (Unicode)0x0020;
+ ++i;
+ }
+ }
+
+ // compute convertedLen and set up the col array
+ col = (int *)gmallocn(len + 1, sizeof(int));
+ convertedLen = 0;
+ for (i = 0; i < len; ++i) {
+ col[i] = convertedLen;
+ if (isUnicode) {
+ ++convertedLen;
+ } else if (uMap) {
+ convertedLen += uMap->mapUnicode(text[i], buf, sizeof(buf));
+ }
+ }
+ col[len] = convertedLen;
+
+ // check for hyphen at end of line
+ //~ need to check for other chars used as hyphens
+ hyphenated = text[len - 1] == (Unicode)'-';
+}
+
+//------------------------------------------------------------------------
+// TextLineFrag
+//------------------------------------------------------------------------
+
+class TextLineFrag {
+public:
+
+ TextLine *line; // the line object
+ int start, len; // offset and length of this fragment
+ // (in Unicode chars)
+ double xMin, xMax; // bounding box coordinates
+ double yMin, yMax;
+ double base; // baseline virtual coordinate
+ int col; // first column
+
+ void init(TextLine *lineA, int startA, int lenA);
+ void computeCoords(GBool oneRot);
+
+ static int cmpYXPrimaryRot(const void *p1, const void *p2);
+ static int cmpYXLineRot(const void *p1, const void *p2);
+ static int cmpXYLineRot(const void *p1, const void *p2);
+ static int cmpXYColumnPrimaryRot(const void *p1, const void *p2);
+ static int cmpXYColumnLineRot(const void *p1, const void *p2);
+};
+
+void TextLineFrag::init(TextLine *lineA, int startA, int lenA) {
+ line = lineA;
+ start = startA;
+ len = lenA;
+ col = line->col[start];
+}
+
+void TextLineFrag::computeCoords(GBool oneRot) {
+ TextBlock *blk;
+ double d0, d1, d2, d3, d4;
+
+ if (oneRot) {
+
+ switch (line->rot) {
+ case 0:
+ xMin = line->edge[start];
+ xMax = line->edge[start + len];
+ yMin = line->yMin;
+ yMax = line->yMax;
+ break;
+ case 1:
+ xMin = line->xMin;
+ xMax = line->xMax;
+ yMin = line->edge[start];
+ yMax = line->edge[start + len];
+ break;
+ case 2:
+ xMin = line->edge[start + len];
+ xMax = line->edge[start];
+ yMin = line->yMin;
+ yMax = line->yMax;
+ break;
+ case 3:
+ xMin = line->xMin;
+ xMax = line->xMax;
+ yMin = line->edge[start + len];
+ yMax = line->edge[start];
+ break;
+ }
+ base = line->base;
+
+ } else {
+
+ if (line->rot == 0 && line->blk->page->primaryRot == 0) {
+
+ xMin = line->edge[start];
+ xMax = line->edge[start + len];
+ yMin = line->yMin;
+ yMax = line->yMax;
+ base = line->base;
+
+ } else {
+
+ blk = line->blk;
+ d0 = line->edge[start];
+ d1 = line->edge[start + len];
+ d2 = d3 = d4 = 0; // make gcc happy
+
+ switch (line->rot) {
+ case 0:
+ d2 = line->yMin;
+ d3 = line->yMax;
+ d4 = line->base;
+ d0 = (d0 - blk->xMin) / (blk->xMax - blk->xMin);
+ d1 = (d1 - blk->xMin) / (blk->xMax - blk->xMin);
+ d2 = (d2 - blk->yMin) / (blk->yMax - blk->yMin);
+ d3 = (d3 - blk->yMin) / (blk->yMax - blk->yMin);
+ d4 = (d4 - blk->yMin) / (blk->yMax - blk->yMin);
+ break;
+ case 1:
+ d2 = line->xMax;
+ d3 = line->xMin;
+ d4 = line->base;
+ d0 = (d0 - blk->yMin) / (blk->yMax - blk->yMin);
+ d1 = (d1 - blk->yMin) / (blk->yMax - blk->yMin);
+ d2 = (blk->xMax - d2) / (blk->xMax - blk->xMin);
+ d3 = (blk->xMax - d3) / (blk->xMax - blk->xMin);
+ d4 = (blk->xMax - d4) / (blk->xMax - blk->xMin);
+ break;
+ case 2:
+ d2 = line->yMax;
+ d3 = line->yMin;
+ d4 = line->base;
+ d0 = (blk->xMax - d0) / (blk->xMax - blk->xMin);
+ d1 = (blk->xMax - d1) / (blk->xMax - blk->xMin);
+ d2 = (blk->yMax - d2) / (blk->yMax - blk->yMin);
+ d3 = (blk->yMax - d3) / (blk->yMax - blk->yMin);
+ d4 = (blk->yMax - d4) / (blk->yMax - blk->yMin);
+ break;
+ case 3:
+ d2 = line->xMin;
+ d3 = line->xMax;
+ d4 = line->base;
+ d0 = (blk->yMax - d0) / (blk->yMax - blk->yMin);
+ d1 = (blk->yMax - d1) / (blk->yMax - blk->yMin);
+ d2 = (d2 - blk->xMin) / (blk->xMax - blk->xMin);
+ d3 = (d3 - blk->xMin) / (blk->xMax - blk->xMin);
+ d4 = (d4 - blk->xMin) / (blk->xMax - blk->xMin);
+ break;
+ }
+
+ switch (line->blk->page->primaryRot) {
+ case 0:
+ xMin = blk->xMin + d0 * (blk->xMax - blk->xMin);
+ xMax = blk->xMin + d1 * (blk->xMax - blk->xMin);
+ yMin = blk->yMin + d2 * (blk->yMax - blk->yMin);
+ yMax = blk->yMin + d3 * (blk->yMax - blk->yMin);
+ base = blk->yMin + d4 * (blk->yMax - blk->yMin);
+ break;
+ case 1:
+ xMin = blk->xMax - d3 * (blk->xMax - blk->xMin);
+ xMax = blk->xMax - d2 * (blk->xMax - blk->xMin);
+ yMin = blk->yMin + d0 * (blk->yMax - blk->yMin);
+ yMax = blk->yMin + d1 * (blk->yMax - blk->yMin);
+ base = blk->xMax - d4 * (blk->xMax - blk->xMin);
+ break;
+ case 2:
+ xMin = blk->xMax - d1 * (blk->xMax - blk->xMin);
+ xMax = blk->xMax - d0 * (blk->xMax - blk->xMin);
+ yMin = blk->yMax - d3 * (blk->yMax - blk->yMin);
+ yMax = blk->yMax - d2 * (blk->yMax - blk->yMin);
+ base = blk->yMax - d4 * (blk->yMax - blk->yMin);
+ break;
+ case 3:
+ xMin = blk->xMin + d2 * (blk->xMax - blk->xMin);
+ xMax = blk->xMin + d3 * (blk->xMax - blk->xMin);
+ yMin = blk->yMax - d1 * (blk->yMax - blk->yMin);
+ yMax = blk->yMax - d0 * (blk->yMax - blk->yMin);
+ base = blk->xMin + d4 * (blk->xMax - blk->xMin);
+ break;
+ }
+
+ }
+ }
+}
+
+int TextLineFrag::cmpYXPrimaryRot(const void *p1, const void *p2) {
+ TextLineFrag *frag1 = (TextLineFrag *)p1;
+ TextLineFrag *frag2 = (TextLineFrag *)p2;
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (frag1->line->blk->page->primaryRot) {
+ case 0:
+ if (fabs(cmp = frag1->yMin - frag2->yMin) < 0.01) {
+ cmp = frag1->xMin - frag2->xMin;
+ }
+ break;
+ case 1:
+ if (fabs(cmp = frag2->xMax - frag1->xMax) < 0.01) {
+ cmp = frag1->yMin - frag2->yMin;
+ }
+ break;
+ case 2:
+ if (fabs(cmp = frag2->yMin - frag1->yMin) < 0.01) {
+ cmp = frag2->xMax - frag1->xMax;
+ }
+ break;
+ case 3:
+ if (fabs(cmp = frag1->xMax - frag2->xMax) < 0.01) {
+ cmp = frag2->yMax - frag1->yMax;
+ }
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextLineFrag::cmpYXLineRot(const void *p1, const void *p2) {
+ TextLineFrag *frag1 = (TextLineFrag *)p1;
+ TextLineFrag *frag2 = (TextLineFrag *)p2;
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (frag1->line->rot) {
+ case 0:
+ if ((cmp = frag1->yMin - frag2->yMin) == 0) {
+ cmp = frag1->xMin - frag2->xMin;
+ }
+ break;
+ case 1:
+ if ((cmp = frag2->xMax - frag1->xMax) == 0) {
+ cmp = frag1->yMin - frag2->yMin;
+ }
+ break;
+ case 2:
+ if ((cmp = frag2->yMin - frag1->yMin) == 0) {
+ cmp = frag2->xMax - frag1->xMax;
+ }
+ break;
+ case 3:
+ if ((cmp = frag1->xMax - frag2->xMax) == 0) {
+ cmp = frag2->yMax - frag1->yMax;
+ }
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextLineFrag::cmpXYLineRot(const void *p1, const void *p2) {
+ TextLineFrag *frag1 = (TextLineFrag *)p1;
+ TextLineFrag *frag2 = (TextLineFrag *)p2;
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (frag1->line->rot) {
+ case 0:
+ if ((cmp = frag1->xMin - frag2->xMin) == 0) {
+ cmp = frag1->yMin - frag2->yMin;
+ }
+ break;
+ case 1:
+ if ((cmp = frag1->yMin - frag2->yMin) == 0) {
+ cmp = frag2->xMax - frag1->xMax;
+ }
+ break;
+ case 2:
+ if ((cmp = frag2->xMax - frag1->xMax) == 0) {
+ cmp = frag2->yMin - frag1->yMin;
+ }
+ break;
+ case 3:
+ if ((cmp = frag2->yMax - frag1->yMax) == 0) {
+ cmp = frag1->xMax - frag2->xMax;
+ }
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextLineFrag::cmpXYColumnPrimaryRot(const void *p1, const void *p2) {
+ TextLineFrag *frag1 = (TextLineFrag *)p1;
+ TextLineFrag *frag2 = (TextLineFrag *)p2;
+ double cmp;
+
+ // if columns overlap, compare y values
+ if (frag1->col < frag2->col + (frag2->line->col[frag2->start + frag2->len] -
+ frag2->line->col[frag2->start]) &&
+ frag2->col < frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start])) {
+ cmp = 0; // make gcc happy
+ switch (frag1->line->blk->page->primaryRot) {
+ case 0: cmp = frag1->yMin - frag2->yMin; break;
+ case 1: cmp = frag2->xMax - frag1->xMax; break;
+ case 2: cmp = frag2->yMin - frag1->yMin; break;
+ case 3: cmp = frag1->xMax - frag2->xMax; break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+ }
+
+ // otherwise, compare starting column
+ return frag1->col - frag2->col;
+}
+
+int TextLineFrag::cmpXYColumnLineRot(const void *p1, const void *p2) {
+ TextLineFrag *frag1 = (TextLineFrag *)p1;
+ TextLineFrag *frag2 = (TextLineFrag *)p2;
+ double cmp;
+
+ // if columns overlap, compare y values
+ if (frag1->col < frag2->col + (frag2->line->col[frag2->start + frag2->len] -
+ frag2->line->col[frag2->start]) &&
+ frag2->col < frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start])) {
+ cmp = 0; // make gcc happy
+ switch (frag1->line->rot) {
+ case 0: cmp = frag1->yMin - frag2->yMin; break;
+ case 1: cmp = frag2->xMax - frag1->xMax; break;
+ case 2: cmp = frag2->yMin - frag1->yMin; break;
+ case 3: cmp = frag1->xMax - frag2->xMax; break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+ }
+
+ // otherwise, compare starting column
+ return frag1->col - frag2->col;
+}
+
+//------------------------------------------------------------------------
+// TextBlock
+//------------------------------------------------------------------------
+
+TextBlock::TextBlock(TextPage *pageA, int rotA) {
+ page = pageA;
+ rot = rotA;
+ xMin = yMin = 0;
+ xMax = yMax = -1;
+ priMin = 0;
+ priMax = page->pageWidth;
+ pool = new TextPool();
+ lines = NULL;
+ curLine = NULL;
+ next = NULL;
+ stackNext = NULL;
+ tableId = -1;
+ tableEnd = gFalse;
+}
+
+TextBlock::~TextBlock() {
+ TextLine *line;
+
+ delete pool;
+ while (lines) {
+ line = lines;
+ lines = lines->next;
+ delete line;
+ }
+}
+
+void TextBlock::addWord(TextWord *word) {
+ pool->addWord(word);
+ if (xMin > xMax) {
+ xMin = word->xMin;
+ xMax = word->xMax;
+ yMin = word->yMin;
+ yMax = word->yMax;
+ } else {
+ if (word->xMin < xMin) {
+ xMin = word->xMin;
+ }
+ if (word->xMax > xMax) {
+ xMax = word->xMax;
+ }
+ if (word->yMin < yMin) {
+ yMin = word->yMin;
+ }
+ if (word->yMax > yMax) {
+ yMax = word->yMax;
+ }
+ }
+}
+
+void TextBlock::coalesce(UnicodeMap *uMap, double fixedPitch) {
+ TextWord *word0, *word1, *word2, *bestWord0, *bestWord1, *lastWord;
+ TextLine *line, *line0, *line1;
+ int poolMinBaseIdx, startBaseIdx, minBaseIdx, maxBaseIdx;
+ int baseIdx, bestWordBaseIdx, idx0, idx1;
+ double minBase, maxBase;
+ double fontSize, wordSpacing, delta, priDelta, secDelta;
+ TextLine **lineArray;
+ GBool found, overlap;
+ int col1, col2;
+ int i, j, k;
+
+ // discard duplicated text (fake boldface, drop shadows)
+ for (idx0 = pool->minBaseIdx; idx0 <= pool->maxBaseIdx; ++idx0) {
+ word0 = pool->getPool(idx0);
+ while (word0) {
+ priDelta = dupMaxPriDelta * word0->fontSize;
+ secDelta = dupMaxSecDelta * word0->fontSize;
+ maxBaseIdx = pool->getBaseIdx(word0->base + secDelta);
+ found = gFalse;
+ word1 = word2 = NULL; // make gcc happy
+ for (idx1 = idx0; idx1 <= maxBaseIdx; ++idx1) {
+ if (idx1 == idx0) {
+ word1 = word0;
+ word2 = word0->next;
+ } else {
+ word1 = NULL;
+ word2 = pool->getPool(idx1);
+ }
+ for (; word2; word1 = word2, word2 = word2->next) {
+ if (word2->len == word0->len &&
+ !memcmp(word2->text, word0->text,
+ word0->len * sizeof(Unicode))) {
+ switch (rot) {
+ case 0:
+ case 2:
+ found = fabs(word0->xMin - word2->xMin) < priDelta &&
+ fabs(word0->xMax - word2->xMax) < priDelta &&
+ fabs(word0->yMin - word2->yMin) < secDelta &&
+ fabs(word0->yMax - word2->yMax) < secDelta;
+ break;
+ case 1:
+ case 3:
+ found = fabs(word0->xMin - word2->xMin) < secDelta &&
+ fabs(word0->xMax - word2->xMax) < secDelta &&
+ fabs(word0->yMin - word2->yMin) < priDelta &&
+ fabs(word0->yMax - word2->yMax) < priDelta;
+ break;
+ }
+ }
+ if (found) {
+ break;
+ }
+ }
+ if (found) {
+ break;
+ }
+ }
+ if (found) {
+ if (word1) {
+ word1->next = word2->next;
+ } else {
+ pool->setPool(idx1, word2->next);
+ }
+ delete word2;
+ } else {
+ word0 = word0->next;
+ }
+ }
+ }
+
+ // build the lines
+ curLine = NULL;
+ poolMinBaseIdx = pool->minBaseIdx;
+ charCount = 0;
+ nLines = 0;
+ while (1) {
+
+ // find the first non-empty line in the pool
+ for (;
+ poolMinBaseIdx <= pool->maxBaseIdx && !pool->getPool(poolMinBaseIdx);
+ ++poolMinBaseIdx) ;
+ if (poolMinBaseIdx > pool->maxBaseIdx) {
+ break;
+ }
+
+ // look for the left-most word in the first four lines of the
+ // pool -- this avoids starting with a superscript word
+ startBaseIdx = poolMinBaseIdx;
+ for (baseIdx = poolMinBaseIdx + 1;
+ baseIdx < poolMinBaseIdx + 4 && baseIdx <= pool->maxBaseIdx;
+ ++baseIdx) {
+ if (!pool->getPool(baseIdx)) {
+ continue;
+ }
+ if (pool->getPool(baseIdx)->primaryCmp(pool->getPool(startBaseIdx))
+ < 0) {
+ startBaseIdx = baseIdx;
+ }
+ }
+
+ // create a new line
+ word0 = pool->getPool(startBaseIdx);
+ pool->setPool(startBaseIdx, word0->next);
+ word0->next = NULL;
+ line = new TextLine(this, word0->rot, word0->base);
+ line->addWord(word0);
+ lastWord = word0;
+
+ // compute the search range
+ fontSize = word0->fontSize;
+ minBase = word0->base - maxIntraLineDelta * fontSize;
+ maxBase = word0->base + maxIntraLineDelta * fontSize;
+ minBaseIdx = pool->getBaseIdx(minBase);
+ maxBaseIdx = pool->getBaseIdx(maxBase);
+ wordSpacing = fixedPitch ? fixedPitch : maxWordSpacing * fontSize;
+
+ // find the rest of the words in this line
+ while (1) {
+
+ // find the left-most word whose baseline is in the range for
+ // this line
+ bestWordBaseIdx = 0;
+ bestWord0 = bestWord1 = NULL;
+ overlap = gFalse;
+ for (baseIdx = minBaseIdx;
+ !overlap && baseIdx <= maxBaseIdx;
+ ++baseIdx) {
+ for (word0 = NULL, word1 = pool->getPool(baseIdx);
+ word1;
+ word0 = word1, word1 = word1->next) {
+ if (word1->base >= minBase &&
+ word1->base <= maxBase) {
+ delta = lastWord->primaryDelta(word1);
+ if (delta < minCharSpacing * fontSize) {
+ overlap = gTrue;
+ break;
+ } else {
+ if (delta < wordSpacing &&
+ (!bestWord1 || word1->primaryCmp(bestWord1) < 0)) {
+ bestWordBaseIdx = baseIdx;
+ bestWord0 = word0;
+ bestWord1 = word1;
+ }
+ break;
+ }
+ }
+ }
+ }
+ if (overlap || !bestWord1) {
+ break;
+ }
+
+ // remove it from the pool, and add it to the line
+ if (bestWord0) {
+ bestWord0->next = bestWord1->next;
+ } else {
+ pool->setPool(bestWordBaseIdx, bestWord1->next);
+ }
+ bestWord1->next = NULL;
+ line->addWord(bestWord1);
+ lastWord = bestWord1;
+ }
+
+ // add the line
+ if (curLine && line->cmpYX(curLine) > 0) {
+ line0 = curLine;
+ line1 = curLine->next;
+ } else {
+ line0 = NULL;
+ line1 = lines;
+ }
+ for (;
+ line1 && line->cmpYX(line1) > 0;
+ line0 = line1, line1 = line1->next) ;
+ if (line0) {
+ line0->next = line;
+ } else {
+ lines = line;
+ }
+ line->next = line1;
+ curLine = line;
+ line->coalesce(uMap);
+ charCount += line->len;
+ ++nLines;
+ }
+
+ // sort lines into xy order for column assignment
+ lineArray = (TextLine **)gmallocn(nLines, sizeof(TextLine *));
+ for (line = lines, i = 0; line; line = line->next, ++i) {
+ lineArray[i] = line;
+ }
+ qsort(lineArray, nLines, sizeof(TextLine *), &TextLine::cmpXY);
+
+ // column assignment
+ nColumns = 0;
+ if (fixedPitch) {
+ for (i = 0; i < nLines; ++i) {
+ line0 = lineArray[i];
+ col1 = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ col1 = (int)((line0->xMin - xMin) / fixedPitch + 0.5);
+ break;
+ case 1:
+ col1 = (int)((line0->yMin - yMin) / fixedPitch + 0.5);
+ break;
+ case 2:
+ col1 = (int)((xMax - line0->xMax) / fixedPitch + 0.5);
+ break;
+ case 3:
+ col1 = (int)((yMax - line0->yMax) / fixedPitch + 0.5);
+ break;
+ }
+ for (k = 0; k <= line0->len; ++k) {
+ line0->col[k] += col1;
+ }
+ if (line0->col[line0->len] > nColumns) {
+ nColumns = line0->col[line0->len];
+ }
+ }
+ } else {
+ for (i = 0; i < nLines; ++i) {
+ line0 = lineArray[i];
+ col1 = 0;
+ for (j = 0; j < i; ++j) {
+ line1 = lineArray[j];
+ if (line1->primaryDelta(line0) >= 0) {
+ col2 = line1->col[line1->len] + 1;
+ } else {
+ k = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ for (k = 0;
+ k < line1->len &&
+ line0->xMin >= 0.5 * (line1->edge[k] + line1->edge[k+1]);
+ ++k) ;
+ break;
+ case 1:
+ for (k = 0;
+ k < line1->len &&
+ line0->yMin >= 0.5 * (line1->edge[k] + line1->edge[k+1]);
+ ++k) ;
+ break;
+ case 2:
+ for (k = 0;
+ k < line1->len &&
+ line0->xMax <= 0.5 * (line1->edge[k] + line1->edge[k+1]);
+ ++k) ;
+ break;
+ case 3:
+ for (k = 0;
+ k < line1->len &&
+ line0->yMax <= 0.5 * (line1->edge[k] + line1->edge[k+1]);
+ ++k) ;
+ break;
+ }
+ col2 = line1->col[k];
+ }
+ if (col2 > col1) {
+ col1 = col2;
+ }
+ }
+ for (k = 0; k <= line0->len; ++k) {
+ line0->col[k] += col1;
+ }
+ if (line0->col[line0->len] > nColumns) {
+ nColumns = line0->col[line0->len];
+ }
+ }
+ }
+ gfree(lineArray);
+}
+
+void TextBlock::updatePriMinMax(TextBlock *blk) {
+ double newPriMin, newPriMax;
+ GBool gotPriMin, gotPriMax;
+
+ gotPriMin = gotPriMax = gFalse;
+ newPriMin = newPriMax = 0; // make gcc happy
+ switch (page->primaryRot) {
+ case 0:
+ case 2:
+ if (blk->yMin < yMax && blk->yMax > yMin) {
+ if (blk->xMin < xMin) {
+ newPriMin = blk->xMax;
+ gotPriMin = gTrue;
+ }
+ if (blk->xMax > xMax) {
+ newPriMax = blk->xMin;
+ gotPriMax = gTrue;
+ }
+ }
+ break;
+ case 1:
+ case 3:
+ if (blk->xMin < xMax && blk->xMax > xMin) {
+ if (blk->yMin < yMin) {
+ newPriMin = blk->yMax;
+ gotPriMin = gTrue;
+ }
+ if (blk->yMax > yMax) {
+ newPriMax = blk->yMin;
+ gotPriMax = gTrue;
+ }
+ }
+ break;
+ }
+ if (gotPriMin) {
+ if (newPriMin > xMin) {
+ newPriMin = xMin;
+ }
+ if (newPriMin > priMin) {
+ priMin = newPriMin;
+ }
+ }
+ if (gotPriMax) {
+ if (newPriMax < xMax) {
+ newPriMax = xMax;
+ }
+ if (newPriMax < priMax) {
+ priMax = newPriMax;
+ }
+ }
+}
+
+int TextBlock::cmpXYPrimaryRot(const void *p1, const void *p2) {
+ TextBlock *blk1 = *(TextBlock **)p1;
+ TextBlock *blk2 = *(TextBlock **)p2;
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (blk1->page->primaryRot) {
+ case 0:
+ if ((cmp = blk1->xMin - blk2->xMin) == 0) {
+ cmp = blk1->yMin - blk2->yMin;
+ }
+ break;
+ case 1:
+ if ((cmp = blk1->yMin - blk2->yMin) == 0) {
+ cmp = blk2->xMax - blk1->xMax;
+ }
+ break;
+ case 2:
+ if ((cmp = blk2->xMax - blk1->xMax) == 0) {
+ cmp = blk2->yMin - blk1->yMin;
+ }
+ break;
+ case 3:
+ if ((cmp = blk2->yMax - blk1->yMax) == 0) {
+ cmp = blk1->xMax - blk2->xMax;
+ }
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextBlock::cmpYXPrimaryRot(const void *p1, const void *p2) {
+ TextBlock *blk1 = *(TextBlock **)p1;
+ TextBlock *blk2 = *(TextBlock **)p2;
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (blk1->page->primaryRot) {
+ case 0:
+ if ((cmp = blk1->yMin - blk2->yMin) == 0) {
+ cmp = blk1->xMin - blk2->xMin;
+ }
+ break;
+ case 1:
+ if ((cmp = blk2->xMax - blk1->xMax) == 0) {
+ cmp = blk1->yMin - blk2->yMin;
+ }
+ break;
+ case 2:
+ if ((cmp = blk2->yMin - blk1->yMin) == 0) {
+ cmp = blk2->xMax - blk1->xMax;
+ }
+ break;
+ case 3:
+ if ((cmp = blk1->xMax - blk2->xMax) == 0) {
+ cmp = blk2->yMax - blk1->yMax;
+ }
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+int TextBlock::primaryCmp(TextBlock *blk) {
+ double cmp;
+
+ cmp = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ cmp = xMin - blk->xMin;
+ break;
+ case 1:
+ cmp = yMin - blk->yMin;
+ break;
+ case 2:
+ cmp = blk->xMax - xMax;
+ break;
+ case 3:
+ cmp = blk->yMax - yMax;
+ break;
+ }
+ return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
+double TextBlock::secondaryDelta(TextBlock *blk) {
+ double delta;
+
+ delta = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ delta = blk->yMin - yMax;
+ break;
+ case 1:
+ delta = xMin - blk->xMax;
+ break;
+ case 2:
+ delta = yMin - blk->yMax;
+ break;
+ case 3:
+ delta = blk->xMin - xMax;
+ break;
+ }
+ return delta;
+}
+
+GBool TextBlock::isBelow(TextBlock *blk) {
+ GBool below;
+
+ below = gFalse; // make gcc happy
+ switch (page->primaryRot) {
+ case 0:
+ below = xMin >= blk->priMin && xMax <= blk->priMax &&
+ yMin > blk->yMin;
+ break;
+ case 1:
+ below = yMin >= blk->priMin && yMax <= blk->priMax &&
+ xMax < blk->xMax;
+ break;
+ case 2:
+ below = xMin >= blk->priMin && xMax <= blk->priMax &&
+ yMax < blk->yMax;
+ break;
+ case 3:
+ below = yMin >= blk->priMin && yMax <= blk->priMax &&
+ xMin > blk->xMin;
+ break;
+ }
+
+ return below;
+}
+
+GBool TextBlock::isBeforeByRule1(TextBlock *blk1) {
+ GBool before = gFalse;
+ GBool overlap = gFalse;
+
+ switch (this->page->primaryRot) {
+ case 0:
+ case 2:
+ overlap = ((this->ExMin <= blk1->ExMin) &&
+ (blk1->ExMin <= this->ExMax)) ||
+ ((blk1->ExMin <= this->ExMin) &&
+ (this->ExMin <= blk1->ExMax));
+ break;
+ case 1:
+ case 3:
+ overlap = ((this->EyMin <= blk1->EyMin) &&
+ (blk1->EyMin <= this->EyMax)) ||
+ ((blk1->EyMin <= this->EyMin) &&
+ (this->EyMin <= blk1->EyMax));
+ break;
+ }
+ switch (this->page->primaryRot) {
+ case 0:
+ before = overlap && this->EyMin < blk1->EyMin;
+ break;
+ case 1:
+ before = overlap && this->ExMax > blk1->ExMax;
+ break;
+ case 2:
+ before = overlap && this->EyMax > blk1->EyMax;
+ break;
+ case 3:
+ before = overlap && this->ExMin < blk1->ExMin;
+ break;
+ }
+ return before;
+}
+
+GBool TextBlock::isBeforeByRule2(TextBlock *blk1) {
+ double cmp = 0;
+ int rotLR = rot;
+
+ if (!page->primaryLR) {
+ rotLR = (rotLR + 2) % 4;
+ }
+
+ switch (rotLR) {
+ case 0:
+ cmp = ExMax - blk1->ExMin;
+ break;
+ case 1:
+ cmp = EyMin - blk1->EyMax;
+ break;
+ case 2:
+ cmp = blk1->ExMax - ExMin;
+ break;
+ case 3:
+ cmp = blk1->EyMin - EyMax;
+ break;
+ }
+ return cmp <= 0;
+}
+
+// Sort into reading order by performing a topological sort using the rules
+// given in "High Performance Document Layout Analysis", T.M. Breuel, 2003.
+// See http://pubs.iupr.org/#2003-breuel-sdiut
+// Topological sort is done by depth first search, see
+// http://en.wikipedia.org/wiki/Topological_sorting
+int TextBlock::visitDepthFirst(TextBlock *blkList, int pos1,
+ TextBlock **sorted, int sortPos,
+ GBool* visited) {
+ int pos2;
+ TextBlock *blk1, *blk2, *blk3;
+ GBool before;
+
+ if (visited[pos1]) {
+ return sortPos;
+ }
+
+ blk1 = this;
+
+#if 0 // for debugging
+ printf("visited: %d %.2f..%.2f %.2f..%.2f\n",
+ sortPos, blk1->ExMin, blk1->ExMax, blk1->EyMin, blk1->EyMax);
+#endif
+ visited[pos1] = gTrue;
+ pos2 = -1;
+ for (blk2 = blkList; blk2; blk2 = blk2->next) {
+ pos2++;
+ if (visited[pos2]) {
+ // skip visited nodes
+ continue;
+ }
+ before = gFalse;
+
+ // is blk2 before blk1? (for table entries)
+ if (blk1->tableId >= 0 && blk1->tableId == blk2->tableId) {
+ if (page->primaryLR) {
+ if (blk2->xMax <= blk1->xMin &&
+ blk2->yMin <= blk1->yMax &&
+ blk2->yMax >= blk1->yMin)
+ before = gTrue;
+ } else {
+ if (blk2->xMin >= blk1->xMax &&
+ blk2->yMin <= blk1->yMax &&
+ blk2->yMax >= blk1->yMin)
+ before = gTrue;
+ }
+
+ if (blk2->yMax <= blk1->yMin)
+ before = gTrue;
+ } else {
+ if (blk2->isBeforeByRule1(blk1)) {
+ // Rule (1) blk1 and blk2 overlap, and blk2 is above blk1.
+ before = gTrue;
+#if 0 // for debugging
+ printf("rule1: %.2f..%.2f %.2f..%.2f %.2f..%.2f %.2f..%.2f\n",
+ blk2->ExMin, blk2->ExMax, blk2->EyMin, blk2->EyMax,
+ blk1->ExMin, blk1->ExMax, blk1->EyMin, blk1->EyMax);
+#endif
+ } else if (blk2->isBeforeByRule2(blk1)) {
+ // Rule (2) blk2 left of blk1, and no intervening blk3
+ // such that blk1 is before blk3 by rule 1,
+ // and blk3 is before blk2 by rule 1.
+ before = gTrue;
+ for (blk3 = blkList; blk3; blk3 = blk3->next) {
+ if (blk3 == blk2 || blk3 == blk1) {
+ continue;
+ }
+ if (blk1->isBeforeByRule1(blk3) &&
+ blk3->isBeforeByRule1(blk2)) {
+ before = gFalse;
+ break;
+ }
+ }
+#if 0 // for debugging
+ if (before) {
+ printf("rule2: %.2f..%.2f %.2f..%.2f %.2f..%.2f %.2f..%.2f\n",
+ blk1->ExMin, blk1->ExMax, blk1->EyMin, blk1->EyMax,
+ blk2->ExMin, blk2->ExMax, blk2->EyMin, blk2->EyMax);
+ }
+#endif
+ }
+ }
+ if (before) {
+ // blk2 is before blk1, so it needs to be visited
+ // before we can add blk1 to the sorted list.
+ sortPos = blk2->visitDepthFirst(blkList, pos2, sorted, sortPos, visited);
+ }
+ }
+#if 0 // for debugging
+ printf("sorted: %d %.2f..%.2f %.2f..%.2f\n",
+ sortPos, blk1->ExMin, blk1->ExMax, blk1->EyMin, blk1->EyMax);
+#endif
+ sorted[sortPos++] = blk1;
+ return sortPos;
+}
+
+//------------------------------------------------------------------------
+// TextFlow
+//------------------------------------------------------------------------
+
+TextFlow::TextFlow(TextPage *pageA, TextBlock *blk) {
+ page = pageA;
+ xMin = blk->xMin;
+ xMax = blk->xMax;
+ yMin = blk->yMin;
+ yMax = blk->yMax;
+ priMin = blk->priMin;
+ priMax = blk->priMax;
+ blocks = lastBlk = blk;
+ next = NULL;
+}
+
+TextFlow::~TextFlow() {
+ TextBlock *blk;
+
+ while (blocks) {
+ blk = blocks;
+ blocks = blocks->next;
+ delete blk;
+ }
+}
+
+void TextFlow::addBlock(TextBlock *blk) {
+ if (lastBlk) {
+ lastBlk->next = blk;
+ } else {
+ blocks = blk;
+ }
+ lastBlk = blk;
+ if (blk->xMin < xMin) {
+ xMin = blk->xMin;
+ }
+ if (blk->xMax > xMax) {
+ xMax = blk->xMax;
+ }
+ if (blk->yMin < yMin) {
+ yMin = blk->yMin;
+ }
+ if (blk->yMax > yMax) {
+ yMax = blk->yMax;
+ }
+}
+
+GBool TextFlow::blockFits(TextBlock *blk, TextBlock *prevBlk) {
+ GBool fits;
+
+ // lower blocks must use smaller fonts
+ if (blk->lines->words->fontSize > lastBlk->lines->words->fontSize) {
+ return gFalse;
+ }
+
+ fits = gFalse; // make gcc happy
+ switch (page->primaryRot) {
+ case 0:
+ fits = blk->xMin >= priMin && blk->xMax <= priMax;
+ break;
+ case 1:
+ fits = blk->yMin >= priMin && blk->yMax <= priMax;
+ break;
+ case 2:
+ fits = blk->xMin >= priMin && blk->xMax <= priMax;
+ break;
+ case 3:
+ fits = blk->yMin >= priMin && blk->yMax <= priMax;
+ break;
+ }
+ return fits;
+}
+
+#if TEXTOUT_WORD_LIST
+
+//------------------------------------------------------------------------
+// TextWordList
+//------------------------------------------------------------------------
+
+TextWordList::TextWordList(TextPage *text, GBool physLayout) {
+ TextFlow *flow;
+ TextBlock *blk;
+ TextLine *line;
+ TextWord *word;
+ TextWord **wordArray;
+ int nWords, i;
+
+ words = new GooList();
+
+ if (text->rawOrder) {
+ for (word = text->rawWords; word; word = word->next) {
+ words->append(word);
+ }
+
+ } else if (physLayout) {
+ // this is inefficient, but it's also the least useful of these
+ // three cases
+ nWords = 0;
+ for (flow = text->flows; flow; flow = flow->next) {
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ for (line = blk->lines; line; line = line->next) {
+ for (word = line->words; word; word = word->next) {
+ ++nWords;
+ }
+ }
+ }
+ }
+ wordArray = (TextWord **)gmallocn(nWords, sizeof(TextWord *));
+ i = 0;
+ for (flow = text->flows; flow; flow = flow->next) {
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ for (line = blk->lines; line; line = line->next) {
+ for (word = line->words; word; word = word->next) {
+ wordArray[i++] = word;
+ }
+ }
+ }
+ }
+ qsort(wordArray, nWords, sizeof(TextWord *), &TextWord::cmpYX);
+ for (i = 0; i < nWords; ++i) {
+ words->append(wordArray[i]);
+ }
+ gfree(wordArray);
+
+ } else {
+ for (flow = text->flows; flow; flow = flow->next) {
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ for (line = blk->lines; line; line = line->next) {
+ for (word = line->words; word; word = word->next) {
+ words->append(word);
+ }
+ }
+ }
+ }
+ }
+}
+
+TextWordList::~TextWordList() {
+ delete words;
+}
+
+int TextWordList::getLength() {
+ return words->getLength();
+}
+
+TextWord *TextWordList::get(int idx) {
+ if (idx < 0 || idx >= words->getLength()) {
+ return NULL;
+ }
+ return (TextWord *)words->get(idx);
+}
+
+#endif // TEXTOUT_WORD_LIST
+
+//------------------------------------------------------------------------
+// TextPage
+//------------------------------------------------------------------------
+
+TextPage::TextPage(GBool rawOrderA) {
+ int rot;
+
+ refCnt = 1;
+ rawOrder = rawOrderA;
+ curWord = NULL;
+ charPos = 0;
+ curFont = NULL;
+ curFontSize = 0;
+ nest = 0;
+ nTinyChars = 0;
+ lastCharOverlap = gFalse;
+ if (!rawOrder) {
+ for (rot = 0; rot < 4; ++rot) {
+ pools[rot] = new TextPool();
+ }
+ }
+ flows = NULL;
+ blocks = NULL;
+ rawWords = NULL;
+ rawLastWord = NULL;
+ fonts = new GooList();
+ lastFindXMin = lastFindYMin = 0;
+ haveLastFind = gFalse;
+ underlines = new GooList();
+ links = new GooList();
+ mergeCombining = gTrue;
+}
+
+TextPage::~TextPage() {
+ int rot;
+
+ clear();
+ if (!rawOrder) {
+ for (rot = 0; rot < 4; ++rot) {
+ delete pools[rot];
+ }
+ }
+ delete fonts;
+ deleteGooList(underlines, TextUnderline);
+ deleteGooList(links, TextLink);
+}
+
+void TextPage::incRefCnt() {
+ refCnt++;
+}
+
+void TextPage::decRefCnt() {
+ if (--refCnt == 0)
+ delete this;
+}
+
+void TextPage::startPage(GfxState *state) {
+ clear();
+ if (state) {
+ pageWidth = state->getPageWidth();
+ pageHeight = state->getPageHeight();
+ } else {
+ pageWidth = pageHeight = 0;
+ }
+}
+
+void TextPage::endPage() {
+ if (curWord) {
+ endWord();
+ }
+}
+
+void TextPage::clear() {
+ int rot;
+ TextFlow *flow;
+ TextWord *word;
+
+ if (curWord) {
+ delete curWord;
+ curWord = NULL;
+ }
+ if (rawOrder) {
+ while (rawWords) {
+ word = rawWords;
+ rawWords = rawWords->next;
+ delete word;
+ }
+ } else {
+ for (rot = 0; rot < 4; ++rot) {
+ delete pools[rot];
+ }
+ while (flows) {
+ flow = flows;
+ flows = flows->next;
+ delete flow;
+ }
+ gfree(blocks);
+ }
+ deleteGooList(fonts, TextFontInfo);
+ deleteGooList(underlines, TextUnderline);
+ deleteGooList(links, TextLink);
+
+ curWord = NULL;
+ charPos = 0;
+ curFont = NULL;
+ curFontSize = 0;
+ nest = 0;
+ nTinyChars = 0;
+ if (!rawOrder) {
+ for (rot = 0; rot < 4; ++rot) {
+ pools[rot] = new TextPool();
+ }
+ }
+ flows = NULL;
+ blocks = NULL;
+ rawWords = NULL;
+ rawLastWord = NULL;
+ fonts = new GooList();
+ underlines = new GooList();
+ links = new GooList();
+}
+
+void TextPage::updateFont(GfxState *state) {
+ GfxFont *gfxFont;
+ double *fm;
+ char *name;
+ int code, mCode, letterCode, anyCode;
+ double w;
+ int i;
+
+ // get the font info object
+ curFont = NULL;
+ for (i = 0; i < fonts->getLength(); ++i) {
+ curFont = (TextFontInfo *)fonts->get(i);
+ if (curFont->matches(state)) {
+ break;
+ }
+ curFont = NULL;
+ }
+ if (!curFont) {
+ curFont = new TextFontInfo(state);
+ fonts->append(curFont);
+ }
+
+ // adjust the font size
+ gfxFont = state->getFont();
+ curFontSize = state->getTransformedFontSize();
+ if (gfxFont && gfxFont->getType() == fontType3) {
+ // This is a hack which makes it possible to deal with some Type 3
+ // fonts. The problem is that it's impossible to know what the
+ // base coordinate system used in the font is without actually
+ // rendering the font. This code tries to guess by looking at the
+ // width of the character 'm' (which breaks if the font is a
+ // subset that doesn't contain 'm').
+ mCode = letterCode = anyCode = -1;
+ for (code = 0; code < 256; ++code) {
+ name = ((Gfx8BitFont *)gfxFont)->getCharName(code);
+ int nameLen = name ? strlen(name) : 0;
+ GBool nameOneChar = nameLen == 1 || (nameLen > 1 && name[1] == '\0');
+ if (nameOneChar && name[0] == 'm') {
+ mCode = code;
+ }
+ if (letterCode < 0 && nameOneChar &&
+ ((name[0] >= 'A' && name[0] <= 'Z') ||
+ (name[0] >= 'a' && name[0] <= 'z'))) {
+ letterCode = code;
+ }
+ if (anyCode < 0 && name &&
+ ((Gfx8BitFont *)gfxFont)->getWidth(code) > 0) {
+ anyCode = code;
+ }
+ }
+ if (mCode >= 0 &&
+ (w = ((Gfx8BitFont *)gfxFont)->getWidth(mCode)) > 0) {
+ // 0.6 is a generic average 'm' width -- yes, this is a hack
+ curFontSize *= w / 0.6;
+ } else if (letterCode >= 0 &&
+ (w = ((Gfx8BitFont *)gfxFont)->getWidth(letterCode)) > 0) {
+ // even more of a hack: 0.5 is a generic letter width
+ curFontSize *= w / 0.5;
+ } else if (anyCode >= 0 &&
+ (w = ((Gfx8BitFont *)gfxFont)->getWidth(anyCode)) > 0) {
+ // better than nothing: 0.5 is a generic character width
+ curFontSize *= w / 0.5;
+ }
+ fm = gfxFont->getFontMatrix();
+ if (fm[0] != 0) {
+ curFontSize *= fabs(fm[3] / fm[0]);
+ }
+ }
+}
+
+void TextPage::beginWord(GfxState *state) {
+ GfxFont *gfxFont;
+ double *fontm;
+ double m[4], m2[4];
+ int rot;
+
+ // This check is needed because Type 3 characters can contain
+ // text-drawing operations (when TextPage is being used via
+ // {X,Win}SplashOutputDev rather than TextOutputDev).
+ if (curWord) {
+ ++nest;
+ return;
+ }
+
+ // compute the rotation
+ state->getFontTransMat(&m[0], &m[1], &m[2], &m[3]);
+ gfxFont = state->getFont();
+ if (gfxFont && gfxFont->getType() == fontType3) {
+ fontm = state->getFont()->getFontMatrix();
+ m2[0] = fontm[0] * m[0] + fontm[1] * m[2];
+ m2[1] = fontm[0] * m[1] + fontm[1] * m[3];
+ m2[2] = fontm[2] * m[0] + fontm[3] * m[2];
+ m2[3] = fontm[2] * m[1] + fontm[3] * m[3];
+ m[0] = m2[0];
+ m[1] = m2[1];
+ m[2] = m2[2];
+ m[3] = m2[3];
+ }
+ if (fabs(m[0] * m[3]) > fabs(m[1] * m[2])) {
+ rot = (m[0] > 0 || m[3] < 0) ? 0 : 2;
+ } else {
+ rot = (m[2] > 0) ? 1 : 3;
+ }
+
+ // for vertical writing mode, the lines are effectively rotated 90
+ // degrees
+ if (gfxFont && gfxFont->getWMode()) {
+ rot = (rot + 1) & 3;
+ }
+
+ curWord = new TextWord(state, rot, curFontSize);
+}
+
+void TextPage::addChar(GfxState *state, double x, double y,
+ double dx, double dy,
+ CharCode c, int nBytes, Unicode *u, int uLen) {
+ double x1, y1, w1, h1, dx2, dy2, base, sp, delta;
+ GBool overlap;
+ int i;
+ int wMode;
+ Matrix mat;
+
+ // subtract char and word spacing from the dx,dy values
+ sp = state->getCharSpace();
+ if (c == (CharCode)0x20) {
+ sp += state->getWordSpace();
+ }
+ state->textTransformDelta(sp * state->getHorizScaling(), 0, &dx2, &dy2);
+ dx -= dx2;
+ dy -= dy2;
+ state->transformDelta(dx, dy, &w1, &h1);
+
+ // throw away chars that aren't inside the page bounds
+ // (and also do a sanity check on the character size)
+ state->transform(x, y, &x1, &y1);
+ if (x1 + w1 < 0 || x1 > pageWidth ||
+ y1 + h1 < 0 || y1 > pageHeight ||
+ x1 != x1 || y1 != y1 || // IEEE way of checking for isnan
+ w1 != w1 || h1 != h1) {
+ charPos += nBytes;
+ return;
+ }
+
+ // check the tiny chars limit
+ if (!globalParams->getTextKeepTinyChars() &&
+ fabs(w1) < 3 && fabs(h1) < 3) {
+ if (++nTinyChars > 50000) {
+ charPos += nBytes;
+ return;
+ }
+ }
+
+ // break words at space character
+ if (uLen == 1 && u[0] == (Unicode)0x20) {
+ charPos += nBytes;
+ endWord();
+ return;
+ }
+
+ state->getFontTransMat(&mat.m[0], &mat.m[1], &mat.m[2], &mat.m[3]);
+ mat.m[4] = x1;
+ mat.m[5] = y1;
+
+ if (mergeCombining && curWord && uLen == 1 &&
+ curWord->addCombining(state, curFont, curFontSize, x1, y1, w1, h1, charPos, nBytes, c,
+ u[0], mat)) {
+ charPos += nBytes;
+ return;
+ }
+
+ // start a new word if:
+ // (1) this character doesn't fall in the right place relative to
+ // the end of the previous word (this places upper and lower
+ // constraints on the position deltas along both the primary
+ // and secondary axes), or
+ // (2) this character overlaps the previous one (duplicated text), or
+ // (3) the previous character was an overlap (we want each duplicated
+ // character to be in a word by itself at this stage),
+ // (4) the font size has changed
+ // (5) the WMode changed
+ if (curWord && curWord->len > 0) {
+ base = sp = delta = 0; // make gcc happy
+ switch (curWord->rot) {
+ case 0:
+ base = y1;
+ sp = x1 - curWord->xMax;
+ delta = x1 - curWord->edge[curWord->len - 1];
+ break;
+ case 1:
+ base = x1;
+ sp = y1 - curWord->yMax;
+ delta = y1 - curWord->edge[curWord->len - 1];
+ break;
+ case 2:
+ base = y1;
+ sp = curWord->xMin - x1;
+ delta = curWord->edge[curWord->len - 1] - x1;
+ break;
+ case 3:
+ base = x1;
+ sp = curWord->yMin - y1;
+ delta = curWord->edge[curWord->len - 1] - y1;
+ break;
+ }
+ overlap = fabs(delta) < dupMaxPriDelta * curWord->fontSize &&
+ fabs(base - curWord->base) < dupMaxSecDelta * curWord->fontSize;
+ wMode = curFont->getWMode();
+ if (overlap || lastCharOverlap ||
+ sp < -minDupBreakOverlap * curWord->fontSize ||
+ sp > minWordBreakSpace * curWord->fontSize ||
+ fabs(base - curWord->base) > 0.5 ||
+ curFontSize != curWord->fontSize ||
+ wMode != curWord->wMode) {
+ endWord();
+ }
+ lastCharOverlap = overlap;
+ } else {
+ lastCharOverlap = gFalse;
+ }
+
+ if (uLen != 0) {
+ // start a new word if needed
+ if (!curWord) {
+ beginWord(state);
+ }
+
+ // page rotation and/or transform matrices can cause text to be
+ // drawn in reverse order -- in this case, swap the begin/end
+ // coordinates and break text into individual chars
+ if ((curWord->rot == 0 && w1 < 0) ||
+ (curWord->rot == 1 && h1 < 0) ||
+ (curWord->rot == 2 && w1 > 0) ||
+ (curWord->rot == 3 && h1 > 0)) {
+ endWord();
+ beginWord(state);
+ x1 += w1;
+ y1 += h1;
+ w1 = -w1;
+ h1 = -h1;
+ }
+
+ // add the characters to the current word
+ w1 /= uLen;
+ h1 /= uLen;
+ for (i = 0; i < uLen; ++i) {
+ curWord->addChar(state, curFont, x1 + i*w1, y1 + i*h1, w1, h1, charPos, nBytes, c, u[i], mat);
+ }
+ }
+ charPos += nBytes;
+}
+
+void TextPage::incCharCount(int nChars) {
+ charPos += nChars;
+}
+
+void TextPage::endWord() {
+ // This check is needed because Type 3 characters can contain
+ // text-drawing operations (when TextPage is being used via
+ // {X,Win}SplashOutputDev rather than TextOutputDev).
+ if (nest > 0) {
+ --nest;
+ return;
+ }
+
+ if (curWord) {
+ addWord(curWord);
+ curWord = NULL;
+ }
+}
+
+void TextPage::addWord(TextWord *word) {
+ // throw away zero-length words -- they don't have valid xMin/xMax
+ // values, and they're useless anyway
+ if (word->len == 0) {
+ delete word;
+ return;
+ }
+
+ if (rawOrder) {
+ if (rawLastWord) {
+ rawLastWord->next = word;
+ } else {
+ rawWords = word;
+ }
+ rawLastWord = word;
+ } else {
+ pools[word->rot]->addWord(word);
+ }
+}
+
+void TextPage::addUnderline(double x0, double y0, double x1, double y1) {
+ underlines->append(new TextUnderline(x0, y0, x1, y1));
+}
+
+void TextPage::addLink(int xMin, int yMin, int xMax, int yMax, AnnotLink *link) {
+ links->append(new TextLink(xMin, yMin, xMax, yMax, link));
+}
+
+void TextPage::coalesce(GBool physLayout, double fixedPitch, GBool doHTML) {
+ UnicodeMap *uMap;
+ TextPool *pool;
+ TextWord *word0, *word1, *word2;
+ TextLine *line;
+ TextBlock *blkList, *blk, *lastBlk, *blk0, *blk1, *blk2;
+ TextFlow *flow, *lastFlow;
+ TextUnderline *underline;
+ TextLink *link;
+ int rot, poolMinBaseIdx, baseIdx, startBaseIdx, endBaseIdx;
+ double minBase, maxBase, newMinBase, newMaxBase;
+ double fontSize, colSpace1, colSpace2, lineSpace, intraLineSpace, blkSpace;
+ GBool found;
+ int count[4];
+ int lrCount;
+ int col1, col2;
+ int i, j, n;
+
+ if (rawOrder) {
+ primaryRot = 0;
+ primaryLR = gTrue;
+ return;
+ }
+
+ uMap = globalParams->getTextEncoding();
+ blkList = NULL;
+ lastBlk = NULL;
+ nBlocks = 0;
+ primaryRot = 0;
+
+#if 0 // for debugging
+ printf("*** initial words ***\n");
+ for (rot = 0; rot < 4; ++rot) {
+ pool = pools[rot];
+ for (baseIdx = pool->minBaseIdx; baseIdx <= pool->maxBaseIdx; ++baseIdx) {
+ for (word0 = pool->getPool(baseIdx); word0; word0 = word0->next) {
+ printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f rot=%d link=%p '",
+ word0->xMin, word0->xMax, word0->yMin, word0->yMax,
+ word0->base, word0->fontSize, rot*90, word0->link);
+ for (i = 0; i < word0->len; ++i) {
+ fputc(word0->text[i] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ }
+ }
+ printf("\n");
+#endif
+
+#if 0 //~ for debugging
+ for (i = 0; i < underlines->getLength(); ++i) {
+ underline = (TextUnderline *)underlines->get(i);
+ printf("underline: x=%g..%g y=%g..%g horiz=%d\n",
+ underline->x0, underline->x1, underline->y0, underline->y1,
+ underline->horiz);
+ }
+#endif
+
+ if (doHTML) {
+
+ //----- handle underlining
+ for (i = 0; i < underlines->getLength(); ++i) {
+ underline = (TextUnderline *)underlines->get(i);
+ if (underline->horiz) {
+ // rot = 0
+ if (pools[0]->minBaseIdx <= pools[0]->maxBaseIdx) {
+ startBaseIdx = pools[0]->getBaseIdx(underline->y0 + minUnderlineGap);
+ endBaseIdx = pools[0]->getBaseIdx(underline->y0 + maxUnderlineGap);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[0]->getPool(j); word0; word0 = word0->next) {
+ //~ need to check the y value against the word baseline
+ if (underline->x0 < word0->xMin + underlineSlack &&
+ word0->xMax - underlineSlack < underline->x1) {
+ word0->underlined = gTrue;
+ }
+ }
+ }
+ }
+
+ // rot = 2
+ if (pools[2]->minBaseIdx <= pools[2]->maxBaseIdx) {
+ startBaseIdx = pools[2]->getBaseIdx(underline->y0 - maxUnderlineGap);
+ endBaseIdx = pools[2]->getBaseIdx(underline->y0 - minUnderlineGap);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[2]->getPool(j); word0; word0 = word0->next) {
+ if (underline->x0 < word0->xMin + underlineSlack &&
+ word0->xMax - underlineSlack < underline->x1) {
+ word0->underlined = gTrue;
+ }
+ }
+ }
+ }
+ } else {
+ // rot = 1
+ if (pools[1]->minBaseIdx <= pools[1]->maxBaseIdx) {
+ startBaseIdx = pools[1]->getBaseIdx(underline->x0 - maxUnderlineGap);
+ endBaseIdx = pools[1]->getBaseIdx(underline->x0 - minUnderlineGap);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[1]->getPool(j); word0; word0 = word0->next) {
+ if (underline->y0 < word0->yMin + underlineSlack &&
+ word0->yMax - underlineSlack < underline->y1) {
+ word0->underlined = gTrue;
+ }
+ }
+ }
+ }
+
+ // rot = 3
+ if (pools[3]->minBaseIdx <= pools[3]->maxBaseIdx) {
+ startBaseIdx = pools[3]->getBaseIdx(underline->x0 + minUnderlineGap);
+ endBaseIdx = pools[3]->getBaseIdx(underline->x0 + maxUnderlineGap);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[3]->getPool(j); word0; word0 = word0->next) {
+ if (underline->y0 < word0->yMin + underlineSlack &&
+ word0->yMax - underlineSlack < underline->y1) {
+ word0->underlined = gTrue;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ //----- handle links
+ for (i = 0; i < links->getLength(); ++i) {
+ link = (TextLink *)links->get(i);
+
+ // rot = 0
+ if (pools[0]->minBaseIdx <= pools[0]->maxBaseIdx) {
+ startBaseIdx = pools[0]->getBaseIdx(link->yMin);
+ endBaseIdx = pools[0]->getBaseIdx(link->yMax);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[0]->getPool(j); word0; word0 = word0->next) {
+ if (link->xMin < word0->xMin + hyperlinkSlack &&
+ word0->xMax - hyperlinkSlack < link->xMax &&
+ link->yMin < word0->yMin + hyperlinkSlack &&
+ word0->yMax - hyperlinkSlack < link->yMax) {
+ word0->link = link->link;
+ }
+ }
+ }
+ }
+
+ // rot = 2
+ if (pools[2]->minBaseIdx <= pools[2]->maxBaseIdx) {
+ startBaseIdx = pools[2]->getBaseIdx(link->yMin);
+ endBaseIdx = pools[2]->getBaseIdx(link->yMax);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[2]->getPool(j); word0; word0 = word0->next) {
+ if (link->xMin < word0->xMin + hyperlinkSlack &&
+ word0->xMax - hyperlinkSlack < link->xMax &&
+ link->yMin < word0->yMin + hyperlinkSlack &&
+ word0->yMax - hyperlinkSlack < link->yMax) {
+ word0->link = link->link;
+ }
+ }
+ }
+ }
+
+ // rot = 1
+ if (pools[1]->minBaseIdx <= pools[1]->maxBaseIdx) {
+ startBaseIdx = pools[1]->getBaseIdx(link->xMin);
+ endBaseIdx = pools[1]->getBaseIdx(link->xMax);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[1]->getPool(j); word0; word0 = word0->next) {
+ if (link->yMin < word0->yMin + hyperlinkSlack &&
+ word0->yMax - hyperlinkSlack < link->yMax &&
+ link->xMin < word0->xMin + hyperlinkSlack &&
+ word0->xMax - hyperlinkSlack < link->xMax) {
+ word0->link = link->link;
+ }
+ }
+ }
+ }
+
+ // rot = 3
+ if (pools[3]->minBaseIdx <= pools[3]->maxBaseIdx) {
+ startBaseIdx = pools[3]->getBaseIdx(link->xMin);
+ endBaseIdx = pools[3]->getBaseIdx(link->xMax);
+ for (j = startBaseIdx; j <= endBaseIdx; ++j) {
+ for (word0 = pools[3]->getPool(j); word0; word0 = word0->next) {
+ if (link->yMin < word0->yMin + hyperlinkSlack &&
+ word0->yMax - hyperlinkSlack < link->yMax &&
+ link->xMin < word0->xMin + hyperlinkSlack &&
+ word0->xMax - hyperlinkSlack < link->xMax) {
+ word0->link = link->link;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ //----- assemble the blocks
+
+ //~ add an outer loop for writing mode (vertical text)
+
+ // build blocks for each rotation value
+ for (rot = 0; rot < 4; ++rot) {
+ pool = pools[rot];
+ poolMinBaseIdx = pool->minBaseIdx;
+ count[rot] = 0;
+
+ // add blocks until no more words are left
+ while (1) {
+
+ // find the first non-empty line in the pool
+ for (;
+ poolMinBaseIdx <= pool->maxBaseIdx &&
+ !pool->getPool(poolMinBaseIdx);
+ ++poolMinBaseIdx) ;
+ if (poolMinBaseIdx > pool->maxBaseIdx) {
+ break;
+ }
+
+ // look for the left-most word in the first four lines of the
+ // pool -- this avoids starting with a superscript word
+ startBaseIdx = poolMinBaseIdx;
+ for (baseIdx = poolMinBaseIdx + 1;
+ baseIdx < poolMinBaseIdx + 4 && baseIdx <= pool->maxBaseIdx;
+ ++baseIdx) {
+ if (!pool->getPool(baseIdx)) {
+ continue;
+ }
+ if (pool->getPool(baseIdx)->primaryCmp(pool->getPool(startBaseIdx))
+ < 0) {
+ startBaseIdx = baseIdx;
+ }
+ }
+
+ // create a new block
+ word0 = pool->getPool(startBaseIdx);
+ pool->setPool(startBaseIdx, word0->next);
+ word0->next = NULL;
+ blk = new TextBlock(this, rot);
+ blk->addWord(word0);
+
+ fontSize = word0->fontSize;
+ minBase = maxBase = word0->base;
+ colSpace1 = minColSpacing1 * fontSize;
+ colSpace2 = minColSpacing2 * fontSize;
+ lineSpace = maxLineSpacingDelta * fontSize;
+ intraLineSpace = maxIntraLineDelta * fontSize;
+
+ // add words to the block
+ do {
+ found = gFalse;
+
+ // look for words on the line above the current top edge of
+ // the block
+ newMinBase = minBase;
+ for (baseIdx = pool->getBaseIdx(minBase);
+ baseIdx >= pool->getBaseIdx(minBase - lineSpace);
+ --baseIdx) {
+ word0 = NULL;
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base < minBase &&
+ word1->base >= minBase - lineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMin < blk->xMax && word1->xMax > blk->xMin)
+ : (word1->yMin < blk->yMax && word1->yMax > blk->yMin)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta1 * fontSize) {
+ word2 = word1;
+ if (word0) {
+ word0->next = word1->next;
+ } else {
+ pool->setPool(baseIdx, word1->next);
+ }
+ word1 = word1->next;
+ word2->next = NULL;
+ blk->addWord(word2);
+ found = gTrue;
+ newMinBase = word2->base;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+ minBase = newMinBase;
+
+ // look for words on the line below the current bottom edge of
+ // the block
+ newMaxBase = maxBase;
+ for (baseIdx = pool->getBaseIdx(maxBase);
+ baseIdx <= pool->getBaseIdx(maxBase + lineSpace);
+ ++baseIdx) {
+ word0 = NULL;
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base > maxBase &&
+ word1->base <= maxBase + lineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMin < blk->xMax && word1->xMax > blk->xMin)
+ : (word1->yMin < blk->yMax && word1->yMax > blk->yMin)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta1 * fontSize) {
+ word2 = word1;
+ if (word0) {
+ word0->next = word1->next;
+ } else {
+ pool->setPool(baseIdx, word1->next);
+ }
+ word1 = word1->next;
+ word2->next = NULL;
+ blk->addWord(word2);
+ found = gTrue;
+ newMaxBase = word2->base;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+ maxBase = newMaxBase;
+
+ // look for words that are on lines already in the block, and
+ // that overlap the block horizontally
+ for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace);
+ baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace);
+ ++baseIdx) {
+ word0 = NULL;
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base >= minBase - intraLineSpace &&
+ word1->base <= maxBase + intraLineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMin < blk->xMax + colSpace1 &&
+ word1->xMax > blk->xMin - colSpace1)
+ : (word1->yMin < blk->yMax + colSpace1 &&
+ word1->yMax > blk->yMin - colSpace1)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta2 * fontSize) {
+ word2 = word1;
+ if (word0) {
+ word0->next = word1->next;
+ } else {
+ pool->setPool(baseIdx, word1->next);
+ }
+ word1 = word1->next;
+ word2->next = NULL;
+ blk->addWord(word2);
+ found = gTrue;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+
+ // only check for outlying words (the next two chunks of code)
+ // if we didn't find anything else
+ if (found) {
+ continue;
+ }
+
+ // scan down the left side of the block, looking for words
+ // that are near (but not overlapping) the block; if there are
+ // three or fewer, add them to the block
+ n = 0;
+ for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace);
+ baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace);
+ ++baseIdx) {
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base >= minBase - intraLineSpace &&
+ word1->base <= maxBase + intraLineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMax <= blk->xMin &&
+ word1->xMax > blk->xMin - colSpace2)
+ : (word1->yMax <= blk->yMin &&
+ word1->yMax > blk->yMin - colSpace2)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta3 * fontSize) {
+ ++n;
+ break;
+ }
+ word1 = word1->next;
+ }
+ }
+ if (n > 0 && n <= 3) {
+ for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace);
+ baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace);
+ ++baseIdx) {
+ word0 = NULL;
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base >= minBase - intraLineSpace &&
+ word1->base <= maxBase + intraLineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMax <= blk->xMin &&
+ word1->xMax > blk->xMin - colSpace2)
+ : (word1->yMax <= blk->yMin &&
+ word1->yMax > blk->yMin - colSpace2)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta3 * fontSize) {
+ word2 = word1;
+ if (word0) {
+ word0->next = word1->next;
+ } else {
+ pool->setPool(baseIdx, word1->next);
+ }
+ word1 = word1->next;
+ word2->next = NULL;
+ blk->addWord(word2);
+ if (word2->base < minBase) {
+ minBase = word2->base;
+ } else if (word2->base > maxBase) {
+ maxBase = word2->base;
+ }
+ found = gTrue;
+ break;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+ }
+
+ // scan down the right side of the block, looking for words
+ // that are near (but not overlapping) the block; if there are
+ // three or fewer, add them to the block
+ n = 0;
+ for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace);
+ baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace);
+ ++baseIdx) {
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base >= minBase - intraLineSpace &&
+ word1->base <= maxBase + intraLineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMin >= blk->xMax &&
+ word1->xMin < blk->xMax + colSpace2)
+ : (word1->yMin >= blk->yMax &&
+ word1->yMin < blk->yMax + colSpace2)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta3 * fontSize) {
+ ++n;
+ break;
+ }
+ word1 = word1->next;
+ }
+ }
+ if (n > 0 && n <= 3) {
+ for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace);
+ baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace);
+ ++baseIdx) {
+ word0 = NULL;
+ word1 = pool->getPool(baseIdx);
+ while (word1) {
+ if (word1->base >= minBase - intraLineSpace &&
+ word1->base <= maxBase + intraLineSpace &&
+ ((rot == 0 || rot == 2)
+ ? (word1->xMin >= blk->xMax &&
+ word1->xMin < blk->xMax + colSpace2)
+ : (word1->yMin >= blk->yMax &&
+ word1->yMin < blk->yMax + colSpace2)) &&
+ fabs(word1->fontSize - fontSize) <
+ maxBlockFontSizeDelta3 * fontSize) {
+ word2 = word1;
+ if (word0) {
+ word0->next = word1->next;
+ } else {
+ pool->setPool(baseIdx, word1->next);
+ }
+ word1 = word1->next;
+ word2->next = NULL;
+ blk->addWord(word2);
+ if (word2->base < minBase) {
+ minBase = word2->base;
+ } else if (word2->base > maxBase) {
+ maxBase = word2->base;
+ }
+ found = gTrue;
+ break;
+ } else {
+ word0 = word1;
+ word1 = word1->next;
+ }
+ }
+ }
+ }
+
+ } while (found);
+
+ //~ need to compute the primary writing mode (horiz/vert) in
+ //~ addition to primary rotation
+
+ // coalesce the block, and add it to the list
+ blk->coalesce(uMap, fixedPitch);
+ if (lastBlk) {
+ lastBlk->next = blk;
+ } else {
+ blkList = blk;
+ }
+ lastBlk = blk;
+ count[rot] += blk->charCount;
+ ++nBlocks;
+ }
+
+ if (count[rot] > count[primaryRot]) {
+ primaryRot = rot;
+ }
+ }
+
+#if 0 // for debugging
+ printf("*** rotation ***\n");
+ for (rot = 0; rot < 4; ++rot) {
+ printf(" %d: %6d\n", rot, count[rot]);
+ }
+ printf(" primary rot = %d\n", primaryRot);
+ printf("\n");
+#endif
+
+#if 0 // for debugging
+ printf("*** blocks ***\n");
+ for (blk = blkList; blk; blk = blk->next) {
+ printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f\n",
+ blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax);
+ for (line = blk->lines; line; line = line->next) {
+ printf(" line: x=%.2f..%.2f y=%.2f..%.2f base=%.2f\n",
+ line->xMin, line->xMax, line->yMin, line->yMax, line->base);
+ for (word0 = line->words; word0; word0 = word0->next) {
+ printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '",
+ word0->xMin, word0->xMax, word0->yMin, word0->yMax,
+ word0->base, word0->fontSize, word0->spaceAfter);
+ for (i = 0; i < word0->len; ++i) {
+ fputc(word0->text[i] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ }
+ }
+ printf("\n");
+#endif
+
+ // determine the primary direction
+ lrCount = 0;
+ for (blk = blkList; blk; blk = blk->next) {
+ for (line = blk->lines; line; line = line->next) {
+ for (word0 = line->words; word0; word0 = word0->next) {
+ for (i = 0; i < word0->len; ++i) {
+ if (unicodeTypeL(word0->text[i])) {
+ ++lrCount;
+ } else if (unicodeTypeR(word0->text[i])) {
+ --lrCount;
+ }
+ }
+ }
+ }
+ }
+ primaryLR = lrCount >= 0;
+
+#if 0 // for debugging
+ printf("*** direction ***\n");
+ printf("lrCount = %d\n", lrCount);
+ printf("primaryLR = %d\n", primaryLR);
+#endif
+
+ //----- column assignment
+
+ // sort blocks into xy order for column assignment
+ if (blocks)
+ gfree (blocks);
+ if (physLayout && fixedPitch) {
+
+ blocks = (TextBlock **)gmallocn(nBlocks, sizeof(TextBlock *));
+ for (blk = blkList, i = 0; blk; blk = blk->next, ++i) {
+ blocks[i] = blk;
+ col1 = 0; // make gcc happy
+ switch (primaryRot) {
+ case 0:
+ col1 = (int)(blk->xMin / fixedPitch + 0.5);
+ break;
+ case 1:
+ col1 = (int)(blk->yMin / fixedPitch + 0.5);
+ break;
+ case 2:
+ col1 = (int)((pageWidth - blk->xMax) / fixedPitch + 0.5);
+ break;
+ case 3:
+ col1 = (int)((pageHeight - blk->yMax) / fixedPitch + 0.5);
+ break;
+ }
+ blk->col = col1;
+ for (line = blk->lines; line; line = line->next) {
+ for (j = 0; j <= line->len; ++j) {
+ line->col[j] += col1;
+ }
+ }
+ }
+
+ } else {
+
+ // sort blocks into xy order for column assignment
+ blocks = (TextBlock **)gmallocn(nBlocks, sizeof(TextBlock *));
+ for (blk = blkList, i = 0; blk; blk = blk->next, ++i) {
+ blocks[i] = blk;
+ }
+ qsort(blocks, nBlocks, sizeof(TextBlock *), &TextBlock::cmpXYPrimaryRot);
+
+ // column assignment
+ for (i = 0; i < nBlocks; ++i) {
+ blk0 = blocks[i];
+ col1 = 0;
+ for (j = 0; j < i; ++j) {
+ blk1 = blocks[j];
+ col2 = 0; // make gcc happy
+ switch (primaryRot) {
+ case 0:
+ if (blk0->xMin > blk1->xMax) {
+ col2 = blk1->col + blk1->nColumns + 3;
+ } else if (blk1->xMax == blk1->xMin) {
+ col2 = blk1->col;
+ } else {
+ col2 = blk1->col + (int)(((blk0->xMin - blk1->xMin) /
+ (blk1->xMax - blk1->xMin)) *
+ blk1->nColumns);
+ }
+ break;
+ case 1:
+ if (blk0->yMin > blk1->yMax) {
+ col2 = blk1->col + blk1->nColumns + 3;
+ } else if (blk1->yMax == blk1->yMin) {
+ col2 = blk1->col;
+ } else {
+ col2 = blk1->col + (int)(((blk0->yMin - blk1->yMin) /
+ (blk1->yMax - blk1->yMin)) *
+ blk1->nColumns);
+ }
+ break;
+ case 2:
+ if (blk0->xMax < blk1->xMin) {
+ col2 = blk1->col + blk1->nColumns + 3;
+ } else if (blk1->xMin == blk1->xMax) {
+ col2 = blk1->col;
+ } else {
+ col2 = blk1->col + (int)(((blk0->xMax - blk1->xMax) /
+ (blk1->xMin - blk1->xMax)) *
+ blk1->nColumns);
+ }
+ break;
+ case 3:
+ if (blk0->yMax < blk1->yMin) {
+ col2 = blk1->col + blk1->nColumns + 3;
+ } else if (blk1->yMin == blk1->yMax) {
+ col2 = blk1->col;
+ } else {
+ col2 = blk1->col + (int)(((blk0->yMax - blk1->yMax) /
+ (blk1->yMin - blk1->yMax)) *
+ blk1->nColumns);
+ }
+ break;
+ }
+ if (col2 > col1) {
+ col1 = col2;
+ }
+ }
+ blk0->col = col1;
+ for (line = blk0->lines; line; line = line->next) {
+ for (j = 0; j <= line->len; ++j) {
+ line->col[j] += col1;
+ }
+ }
+ }
+
+ }
+
+#if 0 // for debugging
+ printf("*** blocks, after column assignment ***\n");
+ for (blk = blkList; blk; blk = blk->next) {
+ printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f col=%d nCols=%d\n",
+ blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax, blk->col,
+ blk->nColumns);
+ for (line = blk->lines; line; line = line->next) {
+ printf(" line: col[0]=%d\n", line->col[0]);
+ for (word0 = line->words; word0; word0 = word0->next) {
+ printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '",
+ word0->xMin, word0->xMax, word0->yMin, word0->yMax,
+ word0->base, word0->fontSize, word0->spaceAfter);
+ for (i = 0; i < word0->len; ++i) {
+ fputc(word0->text[i] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ }
+ }
+ printf("\n");
+#endif
+
+ //----- reading order sort
+
+ // compute space on left and right sides of each block
+ for (i = 0; i < nBlocks; ++i) {
+ blk0 = blocks[i];
+ for (j = 0; j < nBlocks; ++j) {
+ blk1 = blocks[j];
+ if (blk1 != blk0) {
+ blk0->updatePriMinMax(blk1);
+ }
+ }
+ }
+
+#if 0 // for debugging
+ printf("PAGE\n");
+#endif
+
+ int sortPos = 0;
+ GBool *visited = (GBool *)gmallocn(nBlocks, sizeof(GBool));
+ for (i = 0; i < nBlocks; i++) {
+ visited[i] = gFalse;
+ }
+
+ double bxMin0, byMin0, bxMin1, byMin1;
+ int numTables = 0;
+ int tableId = -1;
+ int correspondenceX, correspondenceY;
+ double xCentre1, yCentre1, xCentre2, yCentre2;
+ double xCentre3, yCentre3, xCentre4, yCentre4;
+ double deltaX, deltaY;
+ TextBlock *fblk2 = NULL, *fblk3 = NULL, *fblk4 = NULL;
+
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ blk1->ExMin = blk1->xMin;
+ blk1->ExMax = blk1->xMax;
+ blk1->EyMin = blk1->yMin;
+ blk1->EyMax = blk1->yMax;
+
+ bxMin0 = DBL_MAX;
+ byMin0 = DBL_MAX;
+ bxMin1 = DBL_MAX;
+ byMin1 = DBL_MAX;
+
+ fblk2 = NULL;
+ fblk3 = NULL;
+ fblk4 = NULL;
+
+ /* find fblk2, fblk3 and fblk4 so that
+ * fblk2 is on the right of blk1 and overlap with blk1 in y axis
+ * fblk3 is under blk1 and overlap with blk1 in x axis
+ * fblk4 is under blk1 and on the right of blk1
+ * and they are closest to blk1
+ */
+ for (blk2 = blkList; blk2; blk2 = blk2->next) {
+ if (blk2 != blk1) {
+ if (blk2->yMin <= blk1->yMax &&
+ blk2->yMax >= blk1->yMin &&
+ blk2->xMin > blk1->xMax &&
+ blk2->xMin < bxMin0) {
+ bxMin0 = blk2->xMin;
+ fblk2 = blk2;
+ } else if (blk2->xMin <= blk1->xMax &&
+ blk2->xMax >= blk1->xMin &&
+ blk2->yMin > blk1->yMax &&
+ blk2->yMin < byMin0) {
+ byMin0 = blk2->yMin;
+ fblk3 = blk2;
+ } else if (blk2->xMin > blk1->xMax &&
+ blk2->xMin < bxMin1 &&
+ blk2->yMin > blk1->yMax &&
+ blk2->yMin < byMin1) {
+ bxMin1 = blk2->xMin;
+ byMin1 = blk2->yMin;
+ fblk4 = blk2;
+ }
+ }
+ }
+
+ /* fblk4 can not overlap with fblk3 in x and with fblk2 in y
+ * fblk2 can not overlap with fblk3 in x and y
+ * fblk4 has to overlap with fblk3 in y and with fblk2 in x
+ */
+ if (fblk2 != NULL &&
+ fblk3 != NULL &&
+ fblk4 != NULL) {
+ if (((fblk3->xMin <= fblk4->xMax && fblk3->xMax >= fblk4->xMin) ||
+ (fblk2->yMin <= fblk4->yMax && fblk2->yMax >= fblk4->yMin) ||
+ (fblk2->xMin <= fblk3->xMax && fblk2->xMax >= fblk3->xMin) ||
+ (fblk2->yMin <= fblk3->yMax && fblk2->yMax >= fblk3->yMin)) ||
+ !(fblk4->xMin <= fblk2->xMax && fblk4->xMax >= fblk2->xMin &&
+ fblk4->yMin <= fblk3->yMax && fblk4->yMax >= fblk3->yMin)) {
+ fblk2 = NULL;
+ fblk3 = NULL;
+ fblk4 = NULL;
+ }
+ }
+
+ // if we found any then look whether they form a table
+ if (fblk2 != NULL &&
+ fblk3 != NULL &&
+ fblk4 != NULL) {
+ tableId = -1;
+ correspondenceX = 0;
+ correspondenceY = 0;
+ deltaX = 0.0;
+ deltaY = 0.0;
+
+ if (blk1->lines && blk1->lines->words)
+ deltaX = blk1->lines->words->getFontSize();
+ if (fblk2->lines && fblk2->lines->words)
+ deltaX = deltaX < fblk2->lines->words->getFontSize() ?
+ deltaX : fblk2->lines->words->getFontSize();
+ if (fblk3->lines && fblk3->lines->words)
+ deltaX = deltaX < fblk3->lines->words->getFontSize() ?
+ deltaX : fblk3->lines->words->getFontSize();
+ if (fblk4->lines && fblk4->lines->words)
+ deltaX = deltaX < fblk4->lines->words->getFontSize() ?
+ deltaX : fblk4->lines->words->getFontSize();
+
+ deltaY = deltaX;
+
+ deltaX *= minColSpacing1;
+ deltaY *= maxIntraLineDelta;
+
+ xCentre1 = (blk1->xMax + blk1->xMin) / 2.0;
+ yCentre1 = (blk1->yMax + blk1->yMin) / 2.0;
+ xCentre2 = (fblk2->xMax + fblk2->xMin) / 2.0;
+ yCentre2 = (fblk2->yMax + fblk2->yMin) / 2.0;
+ xCentre3 = (fblk3->xMax + fblk3->xMin) / 2.0;
+ yCentre3 = (fblk3->yMax + fblk3->yMin) / 2.0;
+ xCentre4 = (fblk4->xMax + fblk4->xMin) / 2.0;
+ yCentre4 = (fblk4->yMax + fblk4->yMin) / 2.0;
+
+ // are blocks centrally aligned in x ?
+ if (fabs (xCentre1 - xCentre3) <= deltaX &&
+ fabs (xCentre2 - xCentre4) <= deltaX)
+ correspondenceX++;
+
+ // are blocks centrally aligned in y ?
+ if (fabs (yCentre1 - yCentre2) <= deltaY &&
+ fabs (yCentre3 - yCentre4) <= deltaY)
+ correspondenceY++;
+
+ // are blocks aligned to the left ?
+ if (fabs (blk1->xMin - fblk3->xMin) <= deltaX &&
+ fabs (fblk2->xMin - fblk4->xMin) <= deltaX)
+ correspondenceX++;
+
+ // are blocks aligned to the right ?
+ if (fabs (blk1->xMax - fblk3->xMax) <= deltaX &&
+ fabs (fblk2->xMax - fblk4->xMax) <= deltaX)
+ correspondenceX++;
+
+ // are blocks aligned to the top ?
+ if (fabs (blk1->yMin - fblk2->yMin) <= deltaY &&
+ fabs (fblk3->yMin - fblk4->yMin) <= deltaY)
+ correspondenceY++;
+
+ // are blocks aligned to the bottom ?
+ if (fabs (blk1->yMax - fblk2->yMax) <= deltaY &&
+ fabs (fblk3->yMax - fblk4->yMax) <= deltaY)
+ correspondenceY++;
+
+ // are blocks aligned in x and y ?
+ if (correspondenceX > 0 &&
+ correspondenceY > 0) {
+
+ // find maximal tableId
+ tableId = tableId < fblk4->tableId ? fblk4->tableId : tableId;
+ tableId = tableId < fblk3->tableId ? fblk3->tableId : tableId;
+ tableId = tableId < fblk2->tableId ? fblk2->tableId : tableId;
+ tableId = tableId < blk1->tableId ? blk1->tableId : tableId;
+
+ // if the tableId is -1, then we found new table
+ if (tableId < 0) {
+ tableId = numTables;
+ numTables++;
+ }
+
+ blk1->tableId = tableId;
+ fblk2->tableId = tableId;
+ fblk3->tableId = tableId;
+ fblk4->tableId = tableId;
+ }
+ }
+ }
+
+ /* set extended bounding boxes of all table entries
+ * so that they contain whole table
+ * (we need to process whole table size when comparing it
+ * with regular text blocks)
+ */
+ PDFRectangle *envelopes = new PDFRectangle [numTables];
+ TextBlock **ending_blocks = new TextBlock* [numTables];
+
+ for (i = 0; i < numTables; i++) {
+ envelopes[i].x1 = DBL_MAX;
+ envelopes[i].x2 = DBL_MIN;
+ envelopes[i].y1 = DBL_MAX;
+ envelopes[i].y2 = DBL_MIN;
+ }
+
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ if (blk1->tableId >= 0) {
+ if (blk1->ExMin < envelopes[blk1->tableId].x1) {
+ envelopes[blk1->tableId].x1 = blk1->ExMin;
+ if (!blk1->page->primaryLR)
+ ending_blocks[blk1->tableId] = blk1;
+ }
+
+ if (blk1->ExMax > envelopes[blk1->tableId].x2) {
+ envelopes[blk1->tableId].x2 = blk1->ExMax;
+ if (blk1->page->primaryLR)
+ ending_blocks[blk1->tableId] = blk1;
+ }
+
+ envelopes[blk1->tableId].y1 = blk1->EyMin < envelopes[blk1->tableId].y1 ?
+ blk1->EyMin : envelopes[blk1->tableId].y1;
+ envelopes[blk1->tableId].y2 = blk1->EyMax > envelopes[blk1->tableId].y2 ?
+ blk1->EyMax : envelopes[blk1->tableId].y2;
+ }
+ }
+
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ if (blk1->tableId >= 0 &&
+ blk1->xMin <= ending_blocks[blk1->tableId]->xMax &&
+ blk1->xMax >= ending_blocks[blk1->tableId]->xMin) {
+ blk1->tableEnd = gTrue;
+ }
+ }
+
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ if (blk1->tableId >= 0) {
+ blk1->ExMin = envelopes[blk1->tableId].x1;
+ blk1->ExMax = envelopes[blk1->tableId].x2;
+ blk1->EyMin = envelopes[blk1->tableId].y1;
+ blk1->EyMax = envelopes[blk1->tableId].y2;
+ }
+ }
+ delete[] envelopes;
+ delete[] ending_blocks;
+
+
+ /* set extended bounding boxes of all other blocks
+ * so that they extend in x without hitting neighbours
+ */
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ if (!(blk1->tableId >= 0)) {
+ double xMax = DBL_MAX;
+ double xMin = DBL_MIN;
+
+ for (blk2 = blkList; blk2; blk2 = blk2->next) {
+ if (blk2 == blk1)
+ continue;
+
+ if (blk1->yMin <= blk2->yMax && blk1->yMax >= blk2->yMin) {
+ if (blk2->xMin < xMax && blk2->xMin > blk1->xMax)
+ xMax = blk2->xMin;
+
+ if (blk2->xMax > xMin && blk2->xMax < blk1->xMin)
+ xMin = blk2->xMax;
+ }
+ }
+
+ for (blk2 = blkList; blk2; blk2 = blk2->next) {
+ if (blk2 == blk1)
+ continue;
+
+ if (blk2->xMax > blk1->ExMax &&
+ blk2->xMax <= xMax &&
+ blk2->yMin >= blk1->yMax) {
+ blk1->ExMax = blk2->xMax;
+ }
+
+ if (blk2->xMin < blk1->ExMin &&
+ blk2->xMin >= xMin &&
+ blk2->yMin >= blk1->yMax)
+ blk1->ExMin = blk2->xMin;
+ }
+ }
+ }
+
+ i = -1;
+ for (blk1 = blkList; blk1; blk1 = blk1->next) {
+ i++;
+ sortPos = blk1->visitDepthFirst(blkList, i, blocks, sortPos, visited);
+ }
+ if (visited) {
+ gfree(visited);
+ }
+
+#if 0 // for debugging
+ printf("*** blocks, after ro sort ***\n");
+ for (i = 0; i < nBlocks; ++i) {
+ blk = blocks[i];
+ printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f space=%.2f..%.2f\n",
+ blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax,
+ blk->priMin, blk->priMax);
+ for (line = blk->lines; line; line = line->next) {
+ printf(" line:\n");
+ for (word0 = line->words; word0; word0 = word0->next) {
+ printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '",
+ word0->xMin, word0->xMax, word0->yMin, word0->yMax,
+ word0->base, word0->fontSize, word0->spaceAfter);
+ for (j = 0; j < word0->len; ++j) {
+ fputc(word0->text[j] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ }
+ }
+ printf("\n");
+ fflush(stdout);
+#endif
+
+ // build the flows
+ //~ this needs to be adjusted for writing mode (vertical text)
+ //~ this also needs to account for right-to-left column ordering
+ flow = NULL;
+ while (flows) {
+ flow = flows;
+ flows = flows->next;
+ delete flow;
+ }
+ flows = lastFlow = NULL;
+ // assume blocks are already in reading order,
+ // and construct flows accordingly.
+ for (i = 0; i < nBlocks; i++) {
+ blk = blocks[i];
+ blk->next = NULL;
+ if (flow) {
+ blk1 = blocks[i - 1];
+ blkSpace = maxBlockSpacing * blk1->lines->words->fontSize;
+ if (blk1->secondaryDelta(blk) <= blkSpace &&
+ blk->isBelow(blk1) &&
+ flow->blockFits(blk, blk1)) {
+ flow->addBlock(blk);
+ continue;
+ }
+ }
+ flow = new TextFlow(this, blk);
+ if (lastFlow) {
+ lastFlow->next = flow;
+ } else {
+ flows = flow;
+ }
+ lastFlow = flow;
+ }
+
+#if 0 // for debugging
+ printf("*** flows ***\n");
+ for (flow = flows; flow; flow = flow->next) {
+ printf("flow: x=%.2f..%.2f y=%.2f..%.2f pri:%.2f..%.2f\n",
+ flow->xMin, flow->xMax, flow->yMin, flow->yMax,
+ flow->priMin, flow->priMax);
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ printf(" block: rot=%d x=%.2f..%.2f y=%.2f..%.2f pri=%.2f..%.2f\n",
+ blk->rot, blk->ExMin, blk->ExMax, blk->EyMin, blk->EyMax,
+ blk->priMin, blk->priMax);
+ for (line = blk->lines; line; line = line->next) {
+ printf(" line:\n");
+ for (word0 = line->words; word0; word0 = word0->next) {
+ printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '",
+ word0->xMin, word0->xMax, word0->yMin, word0->yMax,
+ word0->base, word0->fontSize, word0->spaceAfter);
+ for (i = 0; i < word0->len; ++i) {
+ fputc(word0->text[i] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ }
+ }
+ }
+ printf("\n");
+#endif
+
+ if (uMap) {
+ uMap->decRefCnt();
+ }
+}
+
+GBool TextPage::findText(Unicode *s, int len,
+ GBool startAtTop, GBool stopAtBottom,
+ GBool startAtLast, GBool stopAtLast,
+ GBool caseSensitive, GBool backward,
+ GBool wholeWord,
+ double *xMin, double *yMin,
+ double *xMax, double *yMax) {
+ TextBlock *blk;
+ TextLine *line;
+ Unicode *s2, *txt;
+ Unicode *p;
+ int txtSize, m, i, j, k;
+ double xStart, yStart, xStop, yStop;
+ double xMin0, yMin0, xMax0, yMax0;
+ double xMin1, yMin1, xMax1, yMax1;
+ GBool found;
+
+ //~ needs to handle right-to-left text
+
+ if (rawOrder) {
+ return gFalse;
+ }
+
+ // convert the search string to uppercase
+ if (!caseSensitive) {
+ s2 = unicodeNormalizeNFKC(s, len, &len, NULL);
+ for (i = 0; i < len; ++i) {
+ s2[i] = unicodeToUpper(s2[i]);
+ }
+ } else {
+ s2 = unicodeNormalizeNFKC(s, len, &len, NULL);
+ }
+
+ txt = NULL;
+ txtSize = 0;
+
+ xStart = yStart = xStop = yStop = 0;
+ if (startAtLast && haveLastFind) {
+ xStart = lastFindXMin;
+ yStart = lastFindYMin;
+ } else if (!startAtTop) {
+ xStart = *xMin;
+ yStart = *yMin;
+ }
+ if (stopAtLast && haveLastFind) {
+ xStop = lastFindXMin;
+ yStop = lastFindYMin;
+ } else if (!stopAtBottom) {
+ xStop = *xMax;
+ yStop = *yMax;
+ }
+
+ found = gFalse;
+ xMin0 = xMax0 = yMin0 = yMax0 = 0; // make gcc happy
+ xMin1 = xMax1 = yMin1 = yMax1 = 0; // make gcc happy
+
+ for (i = backward ? nBlocks - 1 : 0;
+ backward ? i >= 0 : i < nBlocks;
+ i += backward ? -1 : 1) {
+ blk = blocks[i];
+
+ // check: is the block above the top limit?
+ // (this only works if the page's primary rotation is zero --
+ // otherwise the blocks won't be sorted in the useful order)
+ if (!startAtTop && primaryRot == 0 &&
+ (backward ? blk->yMin > yStart : blk->yMax < yStart)) {
+ continue;
+ }
+
+ // check: is the block below the bottom limit?
+ // (this only works if the page's primary rotation is zero --
+ // otherwise the blocks won't be sorted in the useful order)
+ if (!stopAtBottom && primaryRot == 0 &&
+ (backward ? blk->yMax < yStop : blk->yMin > yStop)) {
+ break;
+ }
+
+ for (line = blk->lines; line; line = line->next) {
+
+ // check: is the line above the top limit?
+ // (this only works if the page's primary rotation is zero --
+ // otherwise the lines won't be sorted in the useful order)
+ if (!startAtTop && primaryRot == 0 &&
+ (backward ? line->yMin > yStart : line->yMin < yStart)) {
+ continue;
+ }
+
+ // check: is the line below the bottom limit?
+ // (this only works if the page's primary rotation is zero --
+ // otherwise the lines won't be sorted in the useful order)
+ if (!stopAtBottom && primaryRot == 0 &&
+ (backward ? line->yMin < yStop : line->yMin > yStop)) {
+ continue;
+ }
+
+ if (!line->normalized)
+ line->normalized = unicodeNormalizeNFKC(line->text, line->len,
+ &line->normalized_len,
+ &line->normalized_idx);
+ // convert the line to uppercase
+ m = line->normalized_len;
+ if (!caseSensitive) {
+ if (m > txtSize) {
+ txt = (Unicode *)greallocn(txt, m, sizeof(Unicode));
+ txtSize = m;
+ }
+ for (k = 0; k < m; ++k) {
+ txt[k] = unicodeToUpper(line->normalized[k]);
+ }
+ } else {
+ txt = line->normalized;
+ }
+
+ // search each position in this line
+ j = backward ? m - len : 0;
+ p = txt + j;
+ while (backward ? j >= 0 : j <= m - len) {
+ if (!wholeWord ||
+ ((j == 0 || !unicodeTypeAlphaNum(txt[j - 1])) &&
+ (j + len == m || !unicodeTypeAlphaNum(txt[j + len])))) {
+
+ // compare the strings
+ for (k = 0; k < len; ++k) {
+ if (p[k] != s2[k]) {
+ break;
+ }
+ }
+
+ // found it
+ if (k == len) {
+ // where s2 matches a subsequence of a compatibility equivalence
+ // decomposition, highlight the entire glyph, since we don't know
+ // the internal layout of subglyph components
+ int normStart = line->normalized_idx[j];
+ int normAfterEnd = line->normalized_idx[j + len - 1] + 1;
+ switch (line->rot) {
+ case 0:
+ xMin1 = line->edge[normStart];
+ xMax1 = line->edge[normAfterEnd];
+ yMin1 = line->yMin;
+ yMax1 = line->yMax;
+ break;
+ case 1:
+ xMin1 = line->xMin;
+ xMax1 = line->xMax;
+ yMin1 = line->edge[normStart];
+ yMax1 = line->edge[normAfterEnd];
+ break;
+ case 2:
+ xMin1 = line->edge[normAfterEnd];
+ xMax1 = line->edge[normStart];
+ yMin1 = line->yMin;
+ yMax1 = line->yMax;
+ break;
+ case 3:
+ xMin1 = line->xMin;
+ xMax1 = line->xMax;
+ yMin1 = line->edge[normAfterEnd];
+ yMax1 = line->edge[normStart];
+ break;
+ }
+ if (backward) {
+ if ((startAtTop ||
+ yMin1 < yStart || (yMin1 == yStart && xMin1 < xStart)) &&
+ (stopAtBottom ||
+ yMin1 > yStop || (yMin1 == yStop && xMin1 > xStop))) {
+ if (!found ||
+ yMin1 > yMin0 || (yMin1 == yMin0 && xMin1 > xMin0)) {
+ xMin0 = xMin1;
+ xMax0 = xMax1;
+ yMin0 = yMin1;
+ yMax0 = yMax1;
+ found = gTrue;
+ }
+ }
+ } else {
+ if ((startAtTop ||
+ yMin1 > yStart || (yMin1 == yStart && xMin1 > xStart)) &&
+ (stopAtBottom ||
+ yMin1 < yStop || (yMin1 == yStop && xMin1 < xStop))) {
+ if (!found ||
+ yMin1 < yMin0 || (yMin1 == yMin0 && xMin1 < xMin0)) {
+ xMin0 = xMin1;
+ xMax0 = xMax1;
+ yMin0 = yMin1;
+ yMax0 = yMax1;
+ found = gTrue;
+ }
+ }
+ }
+ }
+ }
+ if (backward) {
+ --j;
+ --p;
+ } else {
+ ++j;
+ ++p;
+ }
+ }
+ }
+ }
+
+ gfree(s2);
+ if (!caseSensitive) {
+ gfree(txt);
+ }
+
+ if (found) {
+ *xMin = xMin0;
+ *xMax = xMax0;
+ *yMin = yMin0;
+ *yMax = yMax0;
+ lastFindXMin = xMin0;
+ lastFindYMin = yMin0;
+ haveLastFind = gTrue;
+ return gTrue;
+ }
+
+ return gFalse;
+}
+
+GooString *TextPage::getText(double xMin, double yMin,
+ double xMax, double yMax) {
+ GooString *s;
+ UnicodeMap *uMap;
+ TextBlock *blk;
+ TextLine *line;
+ TextLineFrag *frags;
+ int nFrags, fragsSize;
+ TextLineFrag *frag;
+ char space[8], eol[16];
+ int spaceLen, eolLen;
+ int lastRot;
+ double x, y, delta;
+ int col, idx0, idx1, i, j;
+ GBool multiLine, oneRot;
+
+ s = new GooString();
+
+ // get the output encoding
+ if (!(uMap = globalParams->getTextEncoding())) {
+ return s;
+ }
+
+ if (rawOrder) {
+ TextWord* word;
+ char mbc[16];
+ int mbc_len;
+
+ for (word = rawWords; word && word <= rawLastWord; word = word->next) {
+ for (j = 0; j < word->getLength(); ++j) {
+ double gXMin, gXMax, gYMin, gYMax;
+ word->getCharBBox(j, &gXMin, &gYMin, &gXMax, &gYMax);
+ if (xMin <= gXMin && gXMax <= xMax && yMin <= gYMin && gYMax <= yMax)
+ {
+ mbc_len = uMap->mapUnicode( *(word->getChar(j)), mbc, sizeof(mbc) );
+ s->append(mbc, mbc_len);
+ }
+ }
+ }
+ return s;
+ }
+
+ spaceLen = uMap->mapUnicode(0x20, space, sizeof(space));
+ eolLen = 0; // make gcc happy
+ switch (globalParams->getTextEOL()) {
+ case eolUnix:
+ eolLen = uMap->mapUnicode(0x0a, eol, sizeof(eol));
+ break;
+ case eolDOS:
+ eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol));
+ eolLen += uMap->mapUnicode(0x0a, eol + eolLen, sizeof(eol) - eolLen);
+ break;
+ case eolMac:
+ eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol));
+ break;
+ }
+
+ //~ writing mode (horiz/vert)
+
+ // collect the line fragments that are in the rectangle
+ fragsSize = 256;
+ frags = (TextLineFrag *)gmallocn(fragsSize, sizeof(TextLineFrag));
+ nFrags = 0;
+ lastRot = -1;
+ oneRot = gTrue;
+ for (i = 0; i < nBlocks; ++i) {
+ blk = blocks[i];
+ if (xMin < blk->xMax && blk->xMin < xMax &&
+ yMin < blk->yMax && blk->yMin < yMax) {
+ for (line = blk->lines; line; line = line->next) {
+ if (xMin < line->xMax && line->xMin < xMax &&
+ yMin < line->yMax && line->yMin < yMax) {
+ idx0 = idx1 = -1;
+ switch (line->rot) {
+ case 0:
+ y = 0.5 * (line->yMin + line->yMax);
+ if (yMin < y && y < yMax) {
+ j = 0;
+ while (j < line->len) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) > xMin) {
+ idx0 = j;
+ break;
+ }
+ ++j;
+ }
+ j = line->len - 1;
+ while (j >= 0) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) < xMax) {
+ idx1 = j;
+ break;
+ }
+ --j;
+ }
+ }
+ break;
+ case 1:
+ x = 0.5 * (line->xMin + line->xMax);
+ if (xMin < x && x < xMax) {
+ j = 0;
+ while (j < line->len) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) > yMin) {
+ idx0 = j;
+ break;
+ }
+ ++j;
+ }
+ j = line->len - 1;
+ while (j >= 0) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) < yMax) {
+ idx1 = j;
+ break;
+ }
+ --j;
+ }
+ }
+ break;
+ case 2:
+ y = 0.5 * (line->yMin + line->yMax);
+ if (yMin < y && y < yMax) {
+ j = 0;
+ while (j < line->len) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) < xMax) {
+ idx0 = j;
+ break;
+ }
+ ++j;
+ }
+ j = line->len - 1;
+ while (j >= 0) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) > xMin) {
+ idx1 = j;
+ break;
+ }
+ --j;
+ }
+ }
+ break;
+ case 3:
+ x = 0.5 * (line->xMin + line->xMax);
+ if (xMin < x && x < xMax) {
+ j = 0;
+ while (j < line->len) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) < yMax) {
+ idx0 = j;
+ break;
+ }
+ ++j;
+ }
+ j = line->len - 1;
+ while (j >= 0) {
+ if (0.5 * (line->edge[j] + line->edge[j+1]) > yMin) {
+ idx1 = j;
+ break;
+ }
+ --j;
+ }
+ }
+ break;
+ }
+ if (idx0 >= 0 && idx1 >= 0) {
+ if (nFrags == fragsSize) {
+ fragsSize *= 2;
+ frags = (TextLineFrag *)
+ greallocn(frags, fragsSize, sizeof(TextLineFrag));
+ }
+ frags[nFrags].init(line, idx0, idx1 - idx0 + 1);
+ ++nFrags;
+ if (lastRot >= 0 && line->rot != lastRot) {
+ oneRot = gFalse;
+ }
+ lastRot = line->rot;
+ }
+ }
+ }
+ }
+ }
+
+ // sort the fragments and generate the string
+ if (nFrags > 0) {
+
+ for (i = 0; i < nFrags; ++i) {
+ frags[i].computeCoords(oneRot);
+ }
+ assignColumns(frags, nFrags, oneRot);
+
+ // if all lines in the region have the same rotation, use it;
+ // otherwise, use the page's primary rotation
+ if (oneRot) {
+ qsort(frags, nFrags, sizeof(TextLineFrag),
+ &TextLineFrag::cmpYXLineRot);
+ } else {
+ qsort(frags, nFrags, sizeof(TextLineFrag),
+ &TextLineFrag::cmpYXPrimaryRot);
+ }
+ i = 0;
+ while (i < nFrags) {
+ delta = maxIntraLineDelta * frags[i].line->words->fontSize;
+ for (j = i+1;
+ j < nFrags && fabs(frags[j].base - frags[i].base) < delta;
+ ++j) ;
+ qsort(frags + i, j - i, sizeof(TextLineFrag),
+ oneRot ? &TextLineFrag::cmpXYColumnLineRot
+ : &TextLineFrag::cmpXYColumnPrimaryRot);
+ i = j;
+ }
+
+ col = 0;
+ multiLine = gFalse;
+ for (i = 0; i < nFrags; ++i) {
+ frag = &frags[i];
+
+ // insert a return
+ if (frag->col < col ||
+ (i > 0 && fabs(frag->base - frags[i-1].base) >
+ maxIntraLineDelta * frags[i-1].line->words->fontSize)) {
+ s->append(eol, eolLen);
+ col = 0;
+ multiLine = gTrue;
+ }
+
+ // column alignment
+ for (; col < frag->col; ++col) {
+ s->append(space, spaceLen);
+ }
+
+ // get the fragment text
+ col += dumpFragment(frag->line->text + frag->start, frag->len, uMap, s);
+ }
+
+ if (multiLine) {
+ s->append(eol, eolLen);
+ }
+ }
+
+ gfree(frags);
+ uMap->decRefCnt();
+
+ return s;
+}
+
+class TextSelectionVisitor {
+public:
+ TextSelectionVisitor (TextPage *page);
+ virtual ~TextSelectionVisitor () { }
+ virtual void visitBlock (TextBlock *block,
+ TextLine *begin,
+ TextLine *end,
+ PDFRectangle *selection) = 0;
+ virtual void visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection) = 0;
+ virtual void visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection) = 0;
+
+protected:
+ TextPage *page;
+};
+
+TextSelectionVisitor::TextSelectionVisitor (TextPage *page)
+ : page(page)
+{
+}
+
+
+class TextSelectionDumper : public TextSelectionVisitor {
+public:
+ TextSelectionDumper(TextPage *page);
+ virtual ~TextSelectionDumper();
+
+ virtual void visitBlock (TextBlock *block,
+ TextLine *begin,
+ TextLine *end,
+ PDFRectangle *selection) { };
+ virtual void visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection);
+ virtual void visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection);
+ void endPage();
+
+ GooString *getText(void);
+ GooList **takeWordList(int *nLines);
+
+private:
+
+ void startLine();
+ void finishLine();
+
+ GooList **lines;
+ int nLines, linesSize;
+ GooList *words;
+ int tableId;
+ TextBlock *currentBlock;
+};
+
+TextSelectionDumper::TextSelectionDumper(TextPage *page)
+ : TextSelectionVisitor(page)
+{
+ linesSize = 256;
+ lines = (GooList **)gmallocn(linesSize, sizeof(GooList *));
+ nLines = 0;
+
+ tableId = -1;
+ currentBlock = NULL;
+ words = NULL;
+}
+
+TextSelectionDumper::~TextSelectionDumper()
+{
+ for (int i = 0; i < nLines; i++)
+ deleteGooList(lines[i], TextWordSelection);
+ gfree(lines);
+}
+
+void TextSelectionDumper::startLine()
+{
+ finishLine();
+ words = new GooList();
+}
+
+void TextSelectionDumper::finishLine()
+{
+ if (nLines == linesSize) {
+ linesSize *= 2;
+ lines = (GooList **)grealloc(lines, linesSize * sizeof(GooList *));
+ }
+
+ if (words && words->getLength() > 0)
+ lines[nLines++] = words;
+ else if (words)
+ delete words;
+ words = NULL;
+}
+
+void TextSelectionDumper::visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection)
+{
+ TextLineFrag frag;
+
+ frag.init(line, edge_begin, edge_end - edge_begin);
+
+ if (tableId >= 0 && frag.line->blk->tableId < 0) {
+ finishLine();
+
+ tableId = -1;
+ currentBlock = NULL;
+ }
+
+ if (frag.line->blk->tableId >= 0) { // a table
+ if (tableId == -1) {
+ tableId = frag.line->blk->tableId;
+ currentBlock = frag.line->blk;
+ }
+
+ if (currentBlock == frag.line->blk) { // the same block
+ startLine();
+ } else { // another block
+ if (currentBlock->tableEnd) { // previous block ended its row
+ startLine();
+ }
+ currentBlock = frag.line->blk;
+ }
+ } else { // not a table
+ startLine();
+ }
+}
+
+void TextSelectionDumper::visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection)
+{
+ words->append(new TextWordSelection(word, begin, end));
+}
+
+void TextSelectionDumper::endPage()
+{
+ finishLine();
+}
+
+GooString *TextSelectionDumper::getText (void)
+{
+ GooString *text;
+ int i, j;
+ UnicodeMap *uMap;
+ char space[8], eol[16];
+ int spaceLen, eolLen;
+
+ text = new GooString();
+
+ if (!(uMap = globalParams->getTextEncoding()))
+ return text;
+
+ spaceLen = uMap->mapUnicode(0x20, space, sizeof(space));
+ eolLen = uMap->mapUnicode(0x0a, eol, sizeof(eol));
+
+ for (i = 0; i < nLines; i++) {
+ GooList *lineWords = lines[i];
+ for (j = 0; j < lineWords->getLength(); j++) {
+ TextWordSelection *sel = (TextWordSelection *)lineWords->get(j);
+
+ page->dumpFragment (sel->word->text + sel->begin, sel->end - sel->begin, uMap, text);
+ if (j < lineWords->getLength() - 1)
+ text->append(space, spaceLen);
+ }
+ if (i < nLines - 1)
+ text->append(eol, eolLen);
+ }
+
+ uMap->decRefCnt();
+
+ return text;
+}
+
+GooList **TextSelectionDumper::takeWordList(int *nLinesOut)
+{
+ GooList **returnValue = lines;
+
+ *nLinesOut = nLines;
+ if (nLines == 0)
+ return NULL;
+
+ nLines = 0;
+ lines = NULL;
+
+ return returnValue;
+}
+
+class TextSelectionSizer : public TextSelectionVisitor {
+public:
+ TextSelectionSizer(TextPage *page, double scale);
+ ~TextSelectionSizer() { }
+
+ virtual void visitBlock (TextBlock *block,
+ TextLine *begin,
+ TextLine *end,
+ PDFRectangle *selection) { };
+ virtual void visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection);
+ virtual void visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection) { };
+
+ GooList *getRegion () { return list; }
+
+private:
+ GooList *list;
+ double scale;
+};
+
+TextSelectionSizer::TextSelectionSizer(TextPage *page, double scale)
+ : TextSelectionVisitor(page),
+ scale(scale)
+{
+ list = new GooList();
+}
+
+void TextSelectionSizer::visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection)
+{
+ PDFRectangle *rect;
+ double x1, y1, x2, y2, margin;
+
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = line->edge[edge_begin];
+ y1 = line->yMin - margin;
+ x2 = line->edge[edge_end];
+ y2 = line->yMax + margin;
+
+ rect = new PDFRectangle (floor (x1 * scale),
+ floor (y1 * scale),
+ ceil (x2 * scale),
+ ceil (y2 * scale));
+ list->append (rect);
+}
+
+
+class TextSelectionPainter : public TextSelectionVisitor {
+public:
+ TextSelectionPainter(TextPage *page,
+ double scale,
+ int rotation,
+ OutputDev *out,
+ GfxColor *box_color,
+ GfxColor *glyph_color);
+ ~TextSelectionPainter();
+
+ virtual void visitBlock (TextBlock *block,
+ TextLine *begin,
+ TextLine *end,
+ PDFRectangle *selection) { };
+ virtual void visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection);
+ virtual void visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection);
+ void endPage();
+
+private:
+ OutputDev *out;
+ GfxColor *box_color, *glyph_color;
+ GfxState *state;
+ GooList *selectionList;
+ Matrix ctm, ictm;
+};
+
+TextSelectionPainter::TextSelectionPainter(TextPage *page,
+ double scale,
+ int rotation,
+ OutputDev *out,
+ GfxColor *box_color,
+ GfxColor *glyph_color)
+ : TextSelectionVisitor(page),
+ out(out),
+ box_color(box_color),
+ glyph_color(glyph_color)
+{
+ PDFRectangle box(0, 0, page->pageWidth, page->pageHeight);
+
+ selectionList = new GooList();
+ state = new GfxState(72 * scale, 72 * scale, &box, rotation, gFalse);
+
+ state->getCTM(&ctm);
+ ctm.invertTo(&ictm);
+
+ out->startPage(0, state, NULL);
+ out->setDefaultCTM (state->getCTM());
+
+ state->setFillColorSpace(new GfxDeviceRGBColorSpace());
+ state->setFillColor(box_color);
+ out->updateFillColor(state);
+}
+
+TextSelectionPainter::~TextSelectionPainter()
+{
+ deleteGooList(selectionList, TextWordSelection);
+ delete state;
+}
+
+void TextSelectionPainter::visitLine (TextLine *line,
+ TextWord *begin,
+ TextWord *end,
+ int edge_begin,
+ int edge_end,
+ PDFRectangle *selection)
+{
+ double x1, y1, x2, y2, margin;
+
+ margin = (line->yMax - line->yMin) / 8;
+ x1 = floor (line->edge[edge_begin]);
+ y1 = floor (line->yMin - margin);
+ x2 = ceil (line->edge[edge_end]);
+ y2 = ceil (line->yMax + margin);
+
+ ctm.transform(line->edge[edge_begin], line->yMin - margin, &x1, &y1);
+ ctm.transform(line->edge[edge_end], line->yMax + margin, &x2, &y2);
+
+ x1 = floor (x1);
+ y1 = floor (y1);
+ x2 = ceil (x2);
+ y2 = ceil (y2);
+
+ ictm.transform(x1, y1, &x1, &y1);
+ ictm.transform(x2, y2, &x2, &y2);
+
+ state->moveTo(x1, y1);
+ state->lineTo(x2, y1);
+ state->lineTo(x2, y2);
+ state->lineTo(x1, y2);
+ state->closePath();
+}
+
+void TextSelectionPainter::visitWord (TextWord *word, int begin, int end,
+ PDFRectangle *selection)
+{
+ selectionList->append(new TextWordSelection(word, begin, end));
+}
+
+void TextSelectionPainter::endPage()
+{
+ out->fill(state);
+
+ out->saveState(state);
+ out->clip(state);
+
+ state->clearPath();
+
+ state->setFillColor(glyph_color);
+ out->updateFillColor(state);
+
+ for (int i = 0; i < selectionList->getLength(); i++) {
+ TextWordSelection *sel = (TextWordSelection *) selectionList->get(i);
+ int begin = sel->begin;
+
+ while (begin < sel->end) {
+ TextFontInfo *font = sel->word->font[begin];
+ font->gfxFont->incRefCnt();
+ Matrix *mat = &sel->word->textMat[begin];
+
+ state->setTextMat(mat->m[0], mat->m[1], mat->m[2], mat->m[3], 0, 0);
+ state->setFont(font->gfxFont, 1);
+ out->updateFont(state);
+
+ int fEnd = begin + 1;
+ while (fEnd < sel->end && font->matches(sel->word->font[fEnd]) &&
+ mat->m[0] == sel->word->textMat[fEnd].m[0] &&
+ mat->m[1] == sel->word->textMat[fEnd].m[1] &&
+ mat->m[2] == sel->word->textMat[fEnd].m[2] &&
+ mat->m[3] == sel->word->textMat[fEnd].m[3])
+ fEnd++;
+
+ /* The only purpose of this string is to let the output device query
+ * it's length. Might want to change this interface later. */
+ GooString *string = new GooString ((char *) sel->word->charcode, fEnd - begin);
+ out->beginString(state, string);
+
+ for (int i = begin; i < fEnd; i++) {
+ if (i != begin && sel->word->charPos[i] == sel->word->charPos[i - 1])
+ continue;
+
+ out->drawChar(state, sel->word->textMat[i].m[4], sel->word->textMat[i].m[5], 0, 0, 0, 0,
+ sel->word->charcode[i], 1, NULL, 0);
+ }
+ out->endString(state);
+ delete string;
+ begin = fEnd;
+ }
+ }
+
+ out->restoreState(state);
+ out->endPage ();
+}
+
+void TextWord::visitSelection(TextSelectionVisitor *visitor,
+ PDFRectangle *selection,
+ SelectionStyle style)
+{
+ int i, begin, end;
+ double mid;
+
+ begin = len;
+ end = 0;
+ for (i = 0; i < len; i++) {
+ mid = (edge[i] + edge[i + 1]) / 2;
+ if (selection->x1 < mid || selection->x2 < mid)
+ if (i < begin)
+ begin = i;
+ if (mid < selection->x1 || mid < selection->x2)
+ end = i + 1;
+ }
+
+ /* Skip empty selection. */
+ if (end <= begin)
+ return;
+
+ visitor->visitWord (this, begin, end, selection);
+}
+
+void TextLine::visitSelection(TextSelectionVisitor *visitor,
+ PDFRectangle *selection,
+ SelectionStyle style) {
+ TextWord *p, *begin, *end, *current;
+ int i, edge_begin, edge_end;
+ PDFRectangle child_selection;
+
+ begin = NULL;
+ end = NULL;
+ current = NULL;
+ for (p = words; p != NULL; p = p->next) {
+ if (blk->page->primaryLR) {
+ if ((selection->x1 < p->xMax) ||
+ (selection->x2 < p->xMax))
+ if (begin == NULL)
+ begin = p;
+
+ if (((selection->x1 > p->xMin) ||
+ (selection->x2 > p->xMin)) && (begin != NULL)) {
+ end = p->next;
+ current = p;
+ }
+ } else {
+ if ((selection->x1 > p->xMin) ||
+ (selection->x2 > p->xMin))
+ if (begin == NULL)
+ begin = p;
+
+ if (((selection->x1 < p->xMax) ||
+ (selection->x2 < p->xMax)) && (begin != NULL)) {
+ end = p->next;
+ current = p;
+ }
+ }
+ }
+
+ if (!current)
+ current = begin;
+
+ child_selection = *selection;
+ if (style == selectionStyleWord) {
+ child_selection.x1 = begin ? begin->xMin : xMin;
+ if (end && end->xMax != -1) {
+ child_selection.x2 = current->xMax;
+ } else {
+ child_selection.x2 = xMax;
+ }
+ }
+
+ edge_begin = len;
+ edge_end = 0;
+ for (i = 0; i < len; i++) {
+ double mid = (edge[i] + edge[i + 1]) / 2;
+ if (child_selection.x1 < mid || child_selection.x2 < mid)
+ if (i < edge_begin)
+ edge_begin = i;
+ if (mid < child_selection.x2 || mid < child_selection.x1)
+ edge_end = i + 1;
+ }
+
+ /* Skip empty selection. */
+ if (edge_end <= edge_begin)
+ return;
+
+ visitor->visitLine (this, begin, end, edge_begin, edge_end,
+ &child_selection);
+
+ for (p = begin; p != end; p = p->next)
+ p->visitSelection (visitor, &child_selection, style);
+}
+
+void TextBlock::visitSelection(TextSelectionVisitor *visitor,
+ PDFRectangle *selection,
+ SelectionStyle style) {
+ PDFRectangle child_selection;
+ double x[2], y[2], d, best_d[2];
+ TextLine *p, *best_line[2];
+ int i, count = 0, best_count[2], start, stop;
+ GBool all[2];
+
+ x[0] = selection->x1;
+ y[0] = selection->y1;
+ x[1] = selection->x2;
+ y[1] = selection->y2;
+
+ for (i = 0; i < 2; i++) {
+ // the first/last lines are often not nearest
+ // the corners, so we have to force them to be
+ // selected when the selection runs outside this
+ // block.
+ if (page->primaryLR) {
+ all[i] = x[i] >= this->xMax && y[i] >= this->yMax;
+ if (x[i] <= this->xMin && y[i] <= this->yMin) {
+ best_line[i] = this->lines;
+ best_count[i] = 1;
+ } else {
+ best_line[i] = NULL;
+ best_count[i] = 0;
+ }
+ } else {
+ all[i] = x[i] <= this->xMin && y[i] >= this->yMax;
+ if (x[i] >= this->xMax && y[i] <= this->yMin) {
+ best_line[i] = this->lines;
+ best_count[i] = 1;
+ } else {
+ best_line[i] = NULL;
+ best_count[i] = 0;
+ }
+ }
+ best_d[i] = 0;
+ }
+
+ // find the nearest line to the selection points
+ // using the manhattan distance.
+ for (p = this->lines; p; p = p->next) {
+ count++;
+ for (i = 0; i < 2; i++) {
+ d = fmax(p->xMin - x[i], 0.0) +
+ fmax(x[i] - p->xMax, 0.0) +
+ fmax(p->yMin - y[i], 0.0) +
+ fmax(y[i] - p->yMax, 0.0);
+ if (!best_line[i] || all[i] ||
+ d < best_d[i]) {
+ best_line[i] = p;
+ best_count[i] = count;
+ best_d[i] = d;
+ }
+ }
+ }
+ // assert: best is always set.
+ if (!best_line[0] || !best_line[1]) {
+ return;
+ }
+
+ // Now decide which point was first.
+ if (best_count[0] < best_count[1] ||
+ (best_count[0] == best_count[1] &&
+ y[0] < y[1])) {
+ start = 0;
+ stop = 1;
+ } else {
+ start = 1;
+ stop = 0;
+ }
+
+ visitor->visitBlock(this, best_line[start], best_line[stop], selection);
+
+ for (p = best_line[start]; p; p = p->next) {
+ if (page->primaryLR) {
+ child_selection.x1 = p->xMin;
+ child_selection.x2 = p->xMax;
+ } else {
+ child_selection.x1 = p->xMax;
+ child_selection.x2 = p->xMin;
+ }
+ child_selection.y1 = p->yMin;
+ child_selection.y2 = p->yMax;
+ if (style == selectionStyleLine) {
+ if (p == best_line[start]) {
+ child_selection.x1 = 0;
+ child_selection.y1 = 0;
+ }
+ if (p == best_line[stop]) {
+ child_selection.x2 = page->pageWidth;
+ child_selection.y2 = page->pageHeight;
+ }
+ } else {
+ if (p == best_line[start]) {
+ child_selection.x1 = fmax(p->xMin, fmin(p->xMax, x[start]));
+ child_selection.y1 = fmax(p->yMin, fmin(p->yMax, y[start]));
+ }
+ if (p == best_line[stop]) {
+ child_selection.x2 = fmax(p->xMin, fmin(p->xMax, x[stop]));
+ child_selection.y2 = fmax(p->yMin, fmin(p->yMax, y[stop]));
+ }
+ }
+ p->visitSelection(visitor, &child_selection, style);
+ if (p == best_line[stop]) {
+ return;
+ }
+ }
+}
+
+void TextPage::visitSelection(TextSelectionVisitor *visitor,
+ PDFRectangle *selection,
+ SelectionStyle style)
+{
+ PDFRectangle child_selection;
+ double x[2], y[2], d, best_d[2];
+ double xMin, yMin, xMax, yMax;
+ TextFlow *flow, *best_flow[2];
+ TextBlock *blk, *best_block[2];
+ int i, count = 0, best_count[2], start, stop;
+
+ if (!flows)
+ return;
+
+ x[0] = selection->x1;
+ y[0] = selection->y1;
+ x[1] = selection->x2;
+ y[1] = selection->y2;
+
+ xMin = pageWidth;
+ yMin = pageHeight;
+ xMax = 0.0;
+ yMax = 0.0;
+
+ for (i = 0; i < 2; i++) {
+ best_block[i] = NULL;
+ best_flow[i] = NULL;
+ best_count[i] = 0;
+ best_d[i] = 0;
+ }
+
+ // find the nearest blocks to the selection points
+ // using the manhattan distance.
+ for (flow = flows; flow; flow = flow->next) {
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ count++;
+ // the first/last blocks in reading order are
+ // often not the closest to the page corners;
+ // track the corners, force those blocks to
+ // be selected if the selection runs across
+ // multiple pages.
+ xMin = fmin(xMin, blk->xMin);
+ yMin = fmin(yMin, blk->yMin);
+ xMax = fmax(xMax, blk->xMax);
+ yMax = fmax(yMax, blk->yMax);
+ for (i = 0; i < 2; i++) {
+ d = fmax(blk->xMin - x[i], 0.0) +
+ fmax(x[i] - blk->xMax, 0.0) +
+ fmax(blk->yMin - y[i], 0.0) +
+ fmax(y[i] - blk->yMax, 0.0);
+ if (!best_block[i] ||
+ d < best_d[i] ||
+ (!blk->next && !flow->next &&
+ x[i] >= fmin(xMax, pageWidth) &&
+ y[i] >= fmin(yMax, pageHeight))) {
+ best_block[i] = blk;
+ best_flow[i] = flow;
+ best_count[i] = count;
+ best_d[i] = d;
+ }
+ }
+ }
+ }
+ for (i = 0; i < 2; i++) {
+ if (primaryLR) {
+ if (x[i] < xMin && y[i] < yMin) {
+ best_block[i] = flows->blocks;
+ best_flow[i] = flows;
+ best_count[i] = 1;
+ }
+ } else {
+ if (x[i] > xMax && y[i] < yMin) {
+ best_block[i] = flows->blocks;
+ best_flow[i] = flows;
+ best_count[i] = 1;
+ }
+ }
+ }
+ // assert: best is always set.
+ if (!best_block[0] || !best_block[1]) {
+ return;
+ }
+
+ // Now decide which point was first.
+ if (best_count[0] < best_count[1] ||
+ (best_count[0] == best_count[1] && y[0] < y[1])) {
+ start = 0;
+ stop = 1;
+ } else {
+ start = 1;
+ stop = 0;
+ }
+
+ for (flow = best_flow[start]; flow; flow = flow->next) {
+ if (flow == best_flow[start]) {
+ blk = best_block[start];
+ } else {
+ blk = flow->blocks;
+ }
+ for (; blk; blk = blk->next) {
+ if (primaryLR) {
+ child_selection.x1 = blk->xMin;
+ child_selection.x2 = blk->xMax;
+ } else {
+ child_selection.x1 = blk->xMax;
+ child_selection.x2 = blk->xMin;
+ }
+ child_selection.y1 = blk->yMin;
+ child_selection.y2 = blk->yMax;
+ if (blk == best_block[start]) {
+ child_selection.x1 = fmax(blk->xMin, fmin(blk->xMax, x[start]));
+ child_selection.y1 = fmax(blk->yMin, fmin(blk->yMax, y[start]));
+ }
+ if (blk == best_block[stop]) {
+ child_selection.x2 = fmax(blk->xMin, fmin(blk->xMax, x[stop]));
+ child_selection.y2 = fmax(blk->yMin, fmin(blk->yMax, y[stop]));
+ blk->visitSelection(visitor, &child_selection, style);
+ return;
+ }
+ blk->visitSelection(visitor, &child_selection, style);
+ }
+ }
+}
+
+void TextPage::drawSelection(OutputDev *out,
+ double scale,
+ int rotation,
+ PDFRectangle *selection,
+ SelectionStyle style,
+ GfxColor *glyph_color, GfxColor *box_color)
+{
+ TextSelectionPainter painter(this, scale, rotation,
+ out, box_color, glyph_color);
+
+ visitSelection(&painter, selection, style);
+ painter.endPage();
+}
+
+GooList *TextPage::getSelectionRegion(PDFRectangle *selection,
+ SelectionStyle style,
+ double scale) {
+ TextSelectionSizer sizer(this, scale);
+
+ visitSelection(&sizer, selection, style);
+
+ return sizer.getRegion();
+}
+
+GooString *TextPage::getSelectionText(PDFRectangle *selection,
+ SelectionStyle style)
+{
+ TextSelectionDumper dumper(this);
+
+ visitSelection(&dumper, selection, style);
+ dumper.endPage();
+
+ return dumper.getText();
+}
+
+GooList **TextPage::getSelectionWords(PDFRectangle *selection,
+ SelectionStyle style,
+ int *nLines)
+{
+ TextSelectionDumper dumper(this);
+
+ visitSelection(&dumper, selection, style);
+ dumper.endPage();
+
+ return dumper.takeWordList(nLines);
+}
+
+GBool TextPage::findCharRange(int pos, int length,
+ double *xMin, double *yMin,
+ double *xMax, double *yMax) {
+ TextBlock *blk;
+ TextLine *line;
+ TextWord *word;
+ double xMin0, xMax0, yMin0, yMax0;
+ double xMin1, xMax1, yMin1, yMax1;
+ GBool first;
+ int i, j0, j1;
+
+ if (rawOrder) {
+ return gFalse;
+ }
+
+ //~ this doesn't correctly handle ranges split across multiple lines
+ //~ (the highlighted region is the bounding box of all the parts of
+ //~ the range)
+ first = gTrue;
+ xMin0 = xMax0 = yMin0 = yMax0 = 0; // make gcc happy
+ xMin1 = xMax1 = yMin1 = yMax1 = 0; // make gcc happy
+ for (i = 0; i < nBlocks; ++i) {
+ blk = blocks[i];
+ for (line = blk->lines; line; line = line->next) {
+ for (word = line->words; word; word = word->next) {
+ if (pos < word->charPos[word->len] &&
+ pos + length > word->charPos[0]) {
+ for (j0 = 0;
+ j0 < word->len && pos >= word->charPos[j0 + 1];
+ ++j0) ;
+ for (j1 = word->len - 1;
+ j1 > j0 && pos + length <= word->charPos[j1];
+ --j1) ;
+ switch (line->rot) {
+ case 0:
+ xMin1 = word->edge[j0];
+ xMax1 = word->edge[j1 + 1];
+ yMin1 = word->yMin;
+ yMax1 = word->yMax;
+ break;
+ case 1:
+ xMin1 = word->xMin;
+ xMax1 = word->xMax;
+ yMin1 = word->edge[j0];
+ yMax1 = word->edge[j1 + 1];
+ break;
+ case 2:
+ xMin1 = word->edge[j1 + 1];
+ xMax1 = word->edge[j0];
+ yMin1 = word->yMin;
+ yMax1 = word->yMax;
+ break;
+ case 3:
+ xMin1 = word->xMin;
+ xMax1 = word->xMax;
+ yMin1 = word->edge[j1 + 1];
+ yMax1 = word->edge[j0];
+ break;
+ }
+ if (first || xMin1 < xMin0) {
+ xMin0 = xMin1;
+ }
+ if (first || xMax1 > xMax0) {
+ xMax0 = xMax1;
+ }
+ if (first || yMin1 < yMin0) {
+ yMin0 = yMin1;
+ }
+ if (first || yMax1 > yMax0) {
+ yMax0 = yMax1;
+ }
+ first = gFalse;
+ }
+ }
+ }
+ }
+ if (!first) {
+ *xMin = xMin0;
+ *xMax = xMax0;
+ *yMin = yMin0;
+ *yMax = yMax0;
+ return gTrue;
+ }
+ return gFalse;
+}
+
+void TextPage::dump(void *outputStream, TextOutputFunc outputFunc,
+ GBool physLayout) {
+ UnicodeMap *uMap;
+ TextFlow *flow;
+ TextBlock *blk;
+ TextLine *line;
+ TextLineFrag *frags;
+ TextWord *word;
+ int nFrags, fragsSize;
+ TextLineFrag *frag;
+ char space[8], eol[16], eop[8];
+ int spaceLen, eolLen, eopLen;
+ GBool pageBreaks;
+ GooString *s;
+ double delta;
+ int col, i, j, d, n;
+
+ // get the output encoding
+ if (!(uMap = globalParams->getTextEncoding())) {
+ return;
+ }
+ spaceLen = uMap->mapUnicode(0x20, space, sizeof(space));
+ eolLen = 0; // make gcc happy
+ switch (globalParams->getTextEOL()) {
+ case eolUnix:
+ eolLen = uMap->mapUnicode(0x0a, eol, sizeof(eol));
+ break;
+ case eolDOS:
+ eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol));
+ eolLen += uMap->mapUnicode(0x0a, eol + eolLen, sizeof(eol) - eolLen);
+ break;
+ case eolMac:
+ eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol));
+ break;
+ }
+ eopLen = uMap->mapUnicode(0x0c, eop, sizeof(eop));
+ pageBreaks = globalParams->getTextPageBreaks();
+
+ //~ writing mode (horiz/vert)
+
+ // output the page in raw (content stream) order
+ if (rawOrder) {
+
+ for (word = rawWords; word; word = word->next) {
+ s = new GooString();
+ dumpFragment(word->text, word->len, uMap, s);
+ (*outputFunc)(outputStream, s->getCString(), s->getLength());
+ delete s;
+ if (word->next &&
+ fabs(word->next->base - word->base) <
+ maxIntraLineDelta * word->fontSize &&
+ word->next->xMin >
+ word->xMax - minDupBreakOverlap * word->fontSize) {
+ if (word->next->xMin > word->xMax + minWordSpacing * word->fontSize) {
+ (*outputFunc)(outputStream, space, spaceLen);
+ }
+ } else {
+ (*outputFunc)(outputStream, eol, eolLen);
+ }
+ }
+
+ // output the page, maintaining the original physical layout
+ } else if (physLayout) {
+
+ // collect the line fragments for the page and sort them
+ fragsSize = 256;
+ frags = (TextLineFrag *)gmallocn(fragsSize, sizeof(TextLineFrag));
+ nFrags = 0;
+ for (i = 0; i < nBlocks; ++i) {
+ blk = blocks[i];
+ for (line = blk->lines; line; line = line->next) {
+ if (nFrags == fragsSize) {
+ fragsSize *= 2;
+ frags = (TextLineFrag *)greallocn(frags,
+ fragsSize, sizeof(TextLineFrag));
+ }
+ frags[nFrags].init(line, 0, line->len);
+ frags[nFrags].computeCoords(gTrue);
+ ++nFrags;
+ }
+ }
+ qsort(frags, nFrags, sizeof(TextLineFrag), &TextLineFrag::cmpYXPrimaryRot);
+ i = 0;
+ while (i < nFrags) {
+ delta = maxIntraLineDelta * frags[i].line->words->fontSize;
+ for (j = i+1;
+ j < nFrags && fabs(frags[j].base - frags[i].base) < delta;
+ ++j) ;
+ qsort(frags + i, j - i, sizeof(TextLineFrag),
+ &TextLineFrag::cmpXYColumnPrimaryRot);
+ i = j;
+ }
+
+#if 0 // for debugging
+ printf("*** line fragments ***\n");
+ for (i = 0; i < nFrags; ++i) {
+ frag = &frags[i];
+ printf("frag: x=%.2f..%.2f y=%.2f..%.2f base=%.2f '",
+ frag->xMin, frag->xMax, frag->yMin, frag->yMax, frag->base);
+ for (n = 0; n < frag->len; ++n) {
+ fputc(frag->line->text[frag->start + n] & 0xff, stdout);
+ }
+ printf("'\n");
+ }
+ printf("\n");
+#endif
+
+ // generate output
+ col = 0;
+ for (i = 0; i < nFrags; ++i) {
+ frag = &frags[i];
+
+ // column alignment
+ for (; col < frag->col; ++col) {
+ (*outputFunc)(outputStream, space, spaceLen);
+ }
+
+ // print the line
+ s = new GooString();
+ col += dumpFragment(frag->line->text + frag->start, frag->len, uMap, s);
+ (*outputFunc)(outputStream, s->getCString(), s->getLength());
+ delete s;
+
+ // print one or more returns if necessary
+ if (i == nFrags - 1 ||
+ frags[i+1].col < col ||
+ fabs(frags[i+1].base - frag->base) >
+ maxIntraLineDelta * frag->line->words->fontSize) {
+ if (i < nFrags - 1) {
+ d = (int)((frags[i+1].base - frag->base) /
+ frag->line->words->fontSize);
+ if (d < 1) {
+ d = 1;
+ } else if (d > 5) {
+ d = 5;
+ }
+ } else {
+ d = 1;
+ }
+ for (; d > 0; --d) {
+ (*outputFunc)(outputStream, eol, eolLen);
+ }
+ col = 0;
+ }
+ }
+
+ gfree(frags);
+
+ // output the page, "undoing" the layout
+ } else {
+ for (flow = flows; flow; flow = flow->next) {
+ for (blk = flow->blocks; blk; blk = blk->next) {
+ for (line = blk->lines; line; line = line->next) {
+ n = line->len;
+ if (line->hyphenated && (line->next || blk->next)) {
+ --n;
+ }
+ s = new GooString();
+ dumpFragment(line->text, n, uMap, s);
+ (*outputFunc)(outputStream, s->getCString(), s->getLength());
+ delete s;
+ // output a newline when a hyphen is not suppressed
+ if (n == line->len) {
+ (*outputFunc)(outputStream, eol, eolLen);
+ }
+ }
+ }
+ (*outputFunc)(outputStream, eol, eolLen);
+ }
+ }
+
+ // end of page
+ if (pageBreaks) {
+ (*outputFunc)(outputStream, eop, eopLen);
+ }
+
+ uMap->decRefCnt();
+}
+
+void TextPage::setMergeCombining(GBool merge) {
+ mergeCombining = merge;
+}
+
+void TextPage::assignColumns(TextLineFrag *frags, int nFrags, GBool oneRot) {
+ TextLineFrag *frag0, *frag1;
+ int rot, col1, col2, i, j, k;
+
+ // all text in the region has the same rotation -- recompute the
+ // column numbers based only on the text in the region
+ if (oneRot) {
+ qsort(frags, nFrags, sizeof(TextLineFrag), &TextLineFrag::cmpXYLineRot);
+ rot = frags[0].line->rot;
+ for (i = 0; i < nFrags; ++i) {
+ frag0 = &frags[i];
+ col1 = 0;
+ for (j = 0; j < i; ++j) {
+ frag1 = &frags[j];
+ col2 = 0; // make gcc happy
+ switch (rot) {
+ case 0:
+ if (frag0->xMin >= frag1->xMax) {
+ col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start]) + 1;
+ } else {
+ for (k = frag1->start;
+ k < frag1->start + frag1->len &&
+ frag0->xMin >= 0.5 * (frag1->line->edge[k] +
+ frag1->line->edge[k+1]);
+ ++k) ;
+ col2 = frag1->col +
+ frag1->line->col[k] - frag1->line->col[frag1->start];
+ }
+ break;
+ case 1:
+ if (frag0->yMin >= frag1->yMax) {
+ col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start]) + 1;
+ } else {
+ for (k = frag1->start;
+ k < frag1->start + frag1->len &&
+ frag0->yMin >= 0.5 * (frag1->line->edge[k] +
+ frag1->line->edge[k+1]);
+ ++k) ;
+ col2 = frag1->col +
+ frag1->line->col[k] - frag1->line->col[frag1->start];
+ }
+ break;
+ case 2:
+ if (frag0->xMax <= frag1->xMin) {
+ col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start]) + 1;
+ } else {
+ for (k = frag1->start;
+ k < frag1->start + frag1->len &&
+ frag0->xMax <= 0.5 * (frag1->line->edge[k] +
+ frag1->line->edge[k+1]);
+ ++k) ;
+ col2 = frag1->col +
+ frag1->line->col[k] - frag1->line->col[frag1->start];
+ }
+ break;
+ case 3:
+ if (frag0->yMax <= frag1->yMin) {
+ col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] -
+ frag1->line->col[frag1->start]) + 1;
+ } else {
+ for (k = frag1->start;
+ k < frag1->start + frag1->len &&
+ frag0->yMax <= 0.5 * (frag1->line->edge[k] +
+ frag1->line->edge[k+1]);
+ ++k) ;
+ col2 = frag1->col +
+ frag1->line->col[k] - frag1->line->col[frag1->start];
+ }
+ break;
+ }
+ if (col2 > col1) {
+ col1 = col2;
+ }
+ }
+ frag0->col = col1;
+ }
+
+ // the region includes text at different rotations -- use the
+ // globally assigned column numbers, offset by the minimum column
+ // number (i.e., shift everything over to column 0)
+ } else {
+ col1 = frags[0].col;
+ for (i = 1; i < nFrags; ++i) {
+ if (frags[i].col < col1) {
+ col1 = frags[i].col;
+ }
+ }
+ for (i = 0; i < nFrags; ++i) {
+ frags[i].col -= col1;
+ }
+ }
+}
+
+int TextPage::dumpFragment(Unicode *text, int len, UnicodeMap *uMap,
+ GooString *s) {
+ char lre[8], rle[8], popdf[8], buf[8];
+ int lreLen, rleLen, popdfLen, n;
+ int nCols, i, j, k;
+
+ nCols = 0;
+
+ if (uMap->isUnicode()) {
+
+ lreLen = uMap->mapUnicode(0x202a, lre, sizeof(lre));
+ rleLen = uMap->mapUnicode(0x202b, rle, sizeof(rle));
+ popdfLen = uMap->mapUnicode(0x202c, popdf, sizeof(popdf));
+
+ if (primaryLR) {
+
+ i = 0;
+ while (i < len) {
+ // output a left-to-right section
+ for (j = i; j < len && !unicodeTypeR(text[j]); ++j) ;
+ for (k = i; k < j; ++k) {
+ n = uMap->mapUnicode(text[k], buf, sizeof(buf));
+ s->append(buf, n);
+ ++nCols;
+ }
+ i = j;
+ // output a right-to-left section
+ for (j = i;
+ j < len && !(unicodeTypeL(text[j]) || unicodeTypeNum(text[j]));
+ ++j) ;
+ if (j > i) {
+ s->append(rle, rleLen);
+ for (k = j - 1; k >= i; --k) {
+ n = uMap->mapUnicode(text[k], buf, sizeof(buf));
+ s->append(buf, n);
+ ++nCols;
+ }
+ s->append(popdf, popdfLen);
+ i = j;
+ }
+ }
+
+ } else {
+
+ // Note: This code treats numeric characters (European and
+ // Arabic/Indic) as left-to-right, which isn't strictly correct
+ // (incurs extra LRE/POPDF pairs), but does produce correct
+ // visual formatting.
+ s->append(rle, rleLen);
+ i = len - 1;
+ while (i >= 0) {
+ // output a right-to-left section
+ for (j = i;
+ j >= 0 && !(unicodeTypeL(text[j]) || unicodeTypeNum(text[j]));
+ --j) ;
+ for (k = i; k > j; --k) {
+ n = uMap->mapUnicode(text[k], buf, sizeof(buf));
+ s->append(buf, n);
+ ++nCols;
+ }
+ i = j;
+ // output a left-to-right section
+ for (j = i; j >= 0 && !unicodeTypeR(text[j]); --j) ;
+ if (j < i) {
+ s->append(lre, lreLen);
+ for (k = j + 1; k <= i; ++k) {
+ n = uMap->mapUnicode(text[k], buf, sizeof(buf));
+ s->append(buf, n);
+ ++nCols;
+ }
+ s->append(popdf, popdfLen);
+ i = j;
+ }
+ }
+ s->append(popdf, popdfLen);
+
+ }
+
+ } else {
+ for (i = 0; i < len; ++i) {
+ n = uMap->mapUnicode(text[i], buf, sizeof(buf));
+ s->append(buf, n);
+ nCols += n;
+ }
+ }
+
+ return nCols;
+}
+
+#if TEXTOUT_WORD_LIST
+TextWordList *TextPage::makeWordList(GBool physLayout) {
+ return new TextWordList(this, physLayout);
+}
+#endif
+
+//------------------------------------------------------------------------
+// ActualText
+//------------------------------------------------------------------------
+ActualText::ActualText(TextPage *out) {
+ out->incRefCnt();
+ text = out;
+ actualText = NULL;
+ actualTextNBytes = 0;
+}
+
+ActualText::~ActualText() {
+ if (actualText)
+ delete actualText;
+ text->decRefCnt();
+}
+
+void ActualText::addChar(GfxState *state, double x, double y,
+ double dx, double dy,
+ CharCode c, int nBytes, Unicode *u, int uLen) {
+ if (!actualText) {
+ text->addChar(state, x, y, dx, dy, c, nBytes, u, uLen);
+ return;
+ }
+
+ // Inside ActualText span.
+ if (!actualTextNBytes) {
+ actualTextX0 = x;
+ actualTextY0 = y;
+ }
+ actualTextX1 = x + dx;
+ actualTextY1 = y + dy;
+ actualTextNBytes += nBytes;
+}
+
+void ActualText::begin(GfxState *state, GooString *text) {
+ if (actualText)
+ delete actualText;
+ actualText = new GooString(text);
+ actualTextNBytes = 0;
+}
+
+void ActualText::end(GfxState *state) {
+ // ActualText span closed. Output the span text and the
+ // extents of all the glyphs inside the span
+
+ if (actualTextNBytes) {
+ Unicode *uni = NULL;
+ int length;
+
+ // now that we have the position info for all of the text inside
+ // the marked content span, we feed the "ActualText" back through
+ // text->addChar()
+ length = TextStringToUCS4(actualText, &uni);
+ text->addChar(state, actualTextX0, actualTextY0,
+ actualTextX1 - actualTextX0, actualTextY1 - actualTextY0,
+ 0, actualTextNBytes, uni, length);
+ gfree(uni);
+ }
+
+ delete actualText;
+ actualText = NULL;
+ actualTextNBytes = 0;
+}
+
+//------------------------------------------------------------------------
+// TextOutputDev
+//------------------------------------------------------------------------
+
+static void TextOutputDev_outputToFile(void *stream, const char *text, int len) {
+ fwrite(text, 1, len, (FILE *)stream);
+}
+
+TextOutputDev::TextOutputDev(char *fileName, GBool physLayoutA,
+ double fixedPitchA, GBool rawOrderA,
+ GBool append) {
+ text = NULL;
+ physLayout = physLayoutA;
+ fixedPitch = physLayout ? fixedPitchA : 0;
+ rawOrder = rawOrderA;
+ doHTML = gFalse;
+ ok = gTrue;
+
+ // open file
+ needClose = gFalse;
+ if (fileName) {
+ if (!strcmp(fileName, "-")) {
+ outputStream = stdout;
+#ifdef _WIN32
+ // keep DOS from munging the end-of-line characters
+ setmode(fileno(stdout), O_BINARY);
+#endif
+ } else if ((outputStream = fopen(fileName, append ? "ab" : "wb"))) {
+ needClose = gTrue;
+ } else {
+ error(errIO, -1, "Couldn't open text file '{0:s}'", fileName);
+ ok = gFalse;
+ actualText = NULL;
+ return;
+ }
+ outputFunc = &TextOutputDev_outputToFile;
+ } else {
+ outputStream = NULL;
+ }
+
+ // set up text object
+ text = new TextPage(rawOrderA);
+ actualText = new ActualText(text);
+}
+
+TextOutputDev::TextOutputDev(TextOutputFunc func, void *stream,
+ GBool physLayoutA, double fixedPitchA,
+ GBool rawOrderA) {
+ outputFunc = func;
+ outputStream = stream;
+ needClose = gFalse;
+ physLayout = physLayoutA;
+ fixedPitch = physLayout ? fixedPitchA : 0;
+ rawOrder = rawOrderA;
+ doHTML = gFalse;
+ text = new TextPage(rawOrderA);
+ actualText = new ActualText(text);
+ ok = gTrue;
+}
+
+TextOutputDev::~TextOutputDev() {
+ if (needClose) {
+#ifdef MACOS
+ ICS_MapRefNumAndAssign((short)((FILE *)outputStream)->handle);
+#endif
+ fclose((FILE *)outputStream);
+ }
+ if (text) {
+ text->decRefCnt();
+ }
+ delete actualText;
+}
+
+void TextOutputDev::startPage(int pageNum, GfxState *state, XRef *xref) {
+ text->startPage(state);
+}
+
+void TextOutputDev::endPage() {
+ text->endPage();
+ text->coalesce(physLayout, fixedPitch, doHTML);
+ if (outputStream) {
+ text->dump(outputStream, outputFunc, physLayout);
+ }
+}
+
+void TextOutputDev::restoreState(GfxState *state) {
+ text->updateFont(state);
+}
+
+void TextOutputDev::updateFont(GfxState *state) {
+ text->updateFont(state);
+}
+
+void TextOutputDev::beginString(GfxState *state, GooString *s) {
+}
+
+void TextOutputDev::endString(GfxState *state) {
+}
+
+void TextOutputDev::drawChar(GfxState *state, double x, double y,
+ double dx, double dy,
+ double originX, double originY,
+ CharCode c, int nBytes, Unicode *u, int uLen) {
+ actualText->addChar(state, x, y, dx, dy, c, nBytes, u, uLen);
+}
+
+void TextOutputDev::incCharCount(int nChars) {
+ text->incCharCount(nChars);
+}
+
+void TextOutputDev::beginActualText(GfxState *state, GooString *text)
+{
+ actualText->begin(state, text);
+}
+
+void TextOutputDev::endActualText(GfxState *state)
+{
+ actualText->end(state);
+}
+
+void TextOutputDev::stroke(GfxState *state) {
+ GfxPath *path;
+ GfxSubpath *subpath;
+ double x[2], y[2];
+
+ if (!doHTML) {
+ return;
+ }
+ path = state->getPath();
+ if (path->getNumSubpaths() != 1) {
+ return;
+ }
+ subpath = path->getSubpath(0);
+ if (subpath->getNumPoints() != 2) {
+ return;
+ }
+ state->transform(subpath->getX(0), subpath->getY(0), &x[0], &y[0]);
+ state->transform(subpath->getX(1), subpath->getY(1), &x[1], &y[1]);
+
+ // look for a vertical or horizontal line
+ if (x[0] == x[1] || y[0] == y[1]) {
+ text->addUnderline(x[0], y[0], x[1], y[1]);
+ }
+}
+
+void TextOutputDev::fill(GfxState *state) {
+ GfxPath *path;
+ GfxSubpath *subpath;
+ double x[5], y[5];
+ double rx0, ry0, rx1, ry1, t;
+ int i;
+
+ if (!doHTML) {
+ return;
+ }
+ path = state->getPath();
+ if (path->getNumSubpaths() != 1) {
+ return;
+ }
+ subpath = path->getSubpath(0);
+ if (subpath->getNumPoints() != 5) {
+ return;
+ }
+ for (i = 0; i < 5; ++i) {
+ if (subpath->getCurve(i)) {
+ return;
+ }
+ state->transform(subpath->getX(i), subpath->getY(i), &x[i], &y[i]);
+ }
+
+ // look for a rectangle
+ if (x[0] == x[1] && y[1] == y[2] && x[2] == x[3] && y[3] == y[4] &&
+ x[0] == x[4] && y[0] == y[4]) {
+ rx0 = x[0];
+ ry0 = y[0];
+ rx1 = x[2];
+ ry1 = y[1];
+ } else if (y[0] == y[1] && x[1] == x[2] && y[2] == y[3] && x[3] == x[4] &&
+ x[0] == x[4] && y[0] == y[4]) {
+ rx0 = x[0];
+ ry0 = y[0];
+ rx1 = x[1];
+ ry1 = y[2];
+ } else {
+ return;
+ }
+ if (rx1 < rx0) {
+ t = rx0;
+ rx0 = rx1;
+ rx1 = t;
+ }
+ if (ry1 < ry0) {
+ t = ry0;
+ ry0 = ry1;
+ ry1 = t;
+ }
+
+ // skinny horizontal rectangle
+ if (ry1 - ry0 < rx1 - rx0) {
+ if (ry1 - ry0 < maxUnderlineWidth) {
+ ry0 = 0.5 * (ry0 + ry1);
+ text->addUnderline(rx0, ry0, rx1, ry0);
+ }
+
+ // skinny vertical rectangle
+ } else {
+ if (rx1 - rx0 < maxUnderlineWidth) {
+ rx0 = 0.5 * (rx0 + rx1);
+ text->addUnderline(rx0, ry0, rx0, ry1);
+ }
+ }
+}
+
+void TextOutputDev::eoFill(GfxState *state) {
+ if (!doHTML) {
+ return;
+ }
+ fill(state);
+}
+
+void TextOutputDev::processLink(AnnotLink *link) {
+ double x1, y1, x2, y2;
+ int xMin, yMin, xMax, yMax, x, y;
+
+ if (!doHTML) {
+ return;
+ }
+ link->getRect(&x1, &y1, &x2, &y2);
+ cvtUserToDev(x1, y1, &x, &y);
+ xMin = xMax = x;
+ yMin = yMax = y;
+ cvtUserToDev(x1, y2, &x, &y);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ cvtUserToDev(x2, y1, &x, &y);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ cvtUserToDev(x2, y2, &x, &y);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ text->addLink(xMin, yMin, xMax, yMax, link);
+}
+
+GBool TextOutputDev::findText(Unicode *s, int len,
+ GBool startAtTop, GBool stopAtBottom,
+ GBool startAtLast, GBool stopAtLast,
+ GBool caseSensitive, GBool backward,
+ GBool wholeWord,
+ double *xMin, double *yMin,
+ double *xMax, double *yMax) {
+ return text->findText(s, len, startAtTop, stopAtBottom,
+ startAtLast, stopAtLast,
+ caseSensitive, backward, wholeWord,
+ xMin, yMin, xMax, yMax);
+}
+
+GooString *TextOutputDev::getText(double xMin, double yMin,
+ double xMax, double yMax) {
+ return text->getText(xMin, yMin, xMax, yMax);
+}
+
+void TextOutputDev::drawSelection(OutputDev *out,
+ double scale,
+ int rotation,
+ PDFRectangle *selection,
+ SelectionStyle style,
+ GfxColor *glyph_color, GfxColor *box_color) {
+ text->drawSelection(out, scale, rotation, selection, style, glyph_color, box_color);
+}
+
+GooList *TextOutputDev::getSelectionRegion(PDFRectangle *selection,
+ SelectionStyle style,
+ double scale) {
+ return text->getSelectionRegion(selection, style, scale);
+}
+
+GooString *TextOutputDev::getSelectionText(PDFRectangle *selection,
+ SelectionStyle style)
+{
+ return text->getSelectionText(selection, style);
+}
+
+GBool TextOutputDev::findCharRange(int pos, int length,
+ double *xMin, double *yMin,
+ double *xMax, double *yMax) {
+ return text->findCharRange(pos, length, xMin, yMin, xMax, yMax);
+}
+
+void TextOutputDev::setMergeCombining(GBool merge) {
+ text->setMergeCombining(merge);
+}
+
+#if TEXTOUT_WORD_LIST
+TextWordList *TextOutputDev::makeWordList() {
+ return text->makeWordList(physLayout);
+}
+#endif
+
+TextPage *TextOutputDev::takeText() {
+ TextPage *ret;
+
+ ret = text;
+ text = new TextPage(rawOrder);
+ return ret;
+}