/*========================================================================*\ Copyright (c) 1990-2013 Paul Vojta Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL PAUL VOJTA OR ANY OTHER AUTHOR OF THIS SOFTWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. NOTE: xdvi is based on prior work, as noted in the modification history in xdvi.c. \*========================================================================*/ #include "xdvi-config.h" #include "xdvi.h" #include "dvi-init.h" #include "dvi-draw.h" #include "util.h" #include "x_util.h" #include "exit-handlers.h" #include "mime.h" #include "pagesel.h" #include "special.h" #include "hypertex.h" #include "kpathsea/c-fopen.h" #include "kpathsea/c-stat.h" #include "kpathsea/magstep.h" #include "kpathsea/tex-glyph.h" #include "dvi.h" #include "string-utils.h" #include "browser.h" #include "sfSelFile.h" #include "xm_toolbar.h" #include "pagehist.h" #include "message-window.h" #include "search-internal.h" #include "statusline.h" #include "events.h" #include "font-open.h" #if FREETYPE # include FT_SIZES_H #endif #define PK_PRE 247 #define PK_ID 89 #define PK_MAGIC ((PK_PRE << 8) | PK_ID) #define GF_PRE 247 #define GF_ID 131 #define GF_MAGIC ((GF_PRE << 8) | GF_ID) #define VF_PRE 247 #define VF_ID_BYTE 202 #define VF_MAGIC ((VF_PRE << 8) | VF_ID_BYTE) /* font stuff */ struct font *tn_table[TNTABLELEN]; struct font *font_head = NULL; struct tn *tn_head = NULL; wide_ubyte maxchar; unsigned short current_timestamp = 0; unsigned long magnification; double dimconv; double tpic_conv; /* Curently processed page number (starting at 0). */ int current_page = 0; int total_pages = 0; /* postamble offset is saved in this global variable */ long g_postamble_offset; static struct stat fstatbuf; static FILE *m_dvi_fp = NULL; /* original user's file */ static Boolean open_dvi_file(const char *filename, Boolean open_new_instance); /* * DVI preamble and postamble information. */ static unsigned long numerator, denominator; static unsigned int dvi_unshrunk_page_w, dvi_unshrunk_page_h; static unsigned int m_paper_unshrunk_w, m_paper_unshrunk_h; /* * Offset in DVI file of last page, set in read_postamble(). */ static long m_last_page_offset; static const char *dvi_err_list[] = { /* NO_ERROR */ "No Error", /* WRONG_DVI_VERSION */ "Wrong version of DVI output for this program", /* DVI_CORRUPTED */ "DVI file corrupted", /* NOT_A_DVI_FILE */ "Not a DVI file", /* POSTAMBLE_NO_POST */ "Postamble doesn't begin with POST", /* POSTAMBLE_NO_MATCH */ "Postamble doesn't match preamble", /* POSTAMBLE_NON_FNTDEF */ "Non-fntdef command found in postamble", /* NOT_ALL_PIXEL_FILES_FOUND */ "Not all pixel files were found", /* NO_BOP_AT_PAGEDESC */ "Page description doesn't begin with BOP", /* FILE_HAS_ZERO_SIZE */ "File has zero size", /* FILE_DOESNT_EXIST */ "No such file", /* FILE_IS_DIRECTORY */ "Is a directory", /* UNKNOWN_ERROR */ "An unknown error occurred" }; /* * access method for above list */ const char * get_dvi_error(dviErrFlagT flag) { ASSERT(flag < XtNumber(dvi_err_list), "Flag out of range"); return dvi_err_list[flag]; } /* * Extract the unit used in paper size specification. This information is used * to decide the initial grid separation. */ static int atopixunit(const char *arg) { int len = strlen(arg); /* check if the unit 'mm' or 'cm' occurs in the arg string */ return (len > 2 && (arg[len - 2] == 'c' || arg[len - 2] == 'm') && arg[len - 1] == 'm' ? 1.0 / 2.54 : 1.0) * resource.pixels_per_inch + 0.5; } /* * free_vf_chain frees the vf_chain structure. */ static void free_vf_chain(struct tn *tnp) { while (tnp != NULL) { struct tn *tnp1 = tnp->next; free((char *)tnp); tnp = tnp1; } } /* * delete glyph information in a font. */ static void delete_glyphs(struct font *fontp) { struct glyph *g; for (g = fontp->glyph; g <= fontp->glyph + fontp->maxchar; ++g) { if (g->bitmap2.bits) { free(g->bitmap2.bits); g->bitmap2.bits = NULL; } #ifdef GREY if (g->pixmap2) { XDestroyImage(g->image2); g->pixmap2 = NULL; if (g->pixmap2_gc2 != NULL) { free(g->pixmap2_gc2); g->pixmap2_gc2 = NULL; } } #if COLOR g->fg = NULL; #endif #endif } } /* * Release all shrunken bitmaps for all fonts. */ void reset_fonts(void) { struct font *f; for (f = font_head; f != NULL; f = f->next) { if ((f->flags & FONT_LOADED) && !(f->flags & FONT_VIRTUAL)) { delete_glyphs(f); } } } /* * free up fonts no longer in use. */ static void free_unused_fonts(void) { struct font *fontp; struct font **fontpp; fontpp = &font_head; while ((fontp = *fontpp) != NULL) { if (fontp->flags & FONT_IN_USE) fontpp = &fontp->next; else { if (globals.debug & DBG_PK) printf("xdvi: Discarding font \"%s\" at %d dpi\n", fontp->fontname, (int)(fontp->fsize + 0.5)); *fontpp = fontp->next; /* remove from list */ free(fontp->fontname); if (fontp->flags & FONT_LOADED) { #if FREETYPE if (fontp->ft != NULL) { /* if FreeType font */ struct ftfont *ft; ft = fontp->ft; if (fontp->size != NULL) FT_Done_Size(fontp->size); if (fontp == ft->first_size) { if (fontp->next_size == NULL) { /* if this is the only size of this font face */ FT_Done_Face(ft->face); ft->t1->ft = NULL; free(ft); } else { struct font *fp2; ft->first_size = fp2 = fontp->next_size; fp2->file = fontp->file; fontp->file = NULL; fp2->filename = fontp->filename; fontp->filename = NULL; fp2->timestamp = fontp->timestamp; } } else { struct font *fp2; fp2 = ft->first_size; while (fp2->next_size != fontp) fp2 = fp2->next_size; fp2->next_size = fontp->next_size; } } #endif if (fontp->file != NULL) { fclose(fontp->file); } #if FREETYPE if (fontp->filename != NULL) #endif free((char *) fontp->filename); if (fontp->flags & FONT_VIRTUAL) { struct macro *m; for (m = fontp->macro; m <= fontp->macro + fontp->maxchar; ++m) if (m->free_me) free((char *)m->pos); free((char *)fontp->macro); free((char *)fontp->vf_table); free_vf_chain(fontp->vf_chain); } else { delete_glyphs(fontp); free((char *)fontp->glyph); } free((char *)fontp); } } } } #if COLOR /* * Release all allocated pixels, and (in greyscale mode) invalidate * all shrunken glyphs. */ void reset_colors(void) { if (color_list_len != 0) { XFreeColors(DISP, G_colormap, color_list, color_list_len, 0); color_list_len = 0; } while (bg_head != NULL) { struct bgrec *bgp; struct fgrec *fgp; for (fgp = bg_head->fg_head; fgp != NULL;) { struct fgrec *fgp1 = fgp->next; free(fgp); fgp = fgp1; } bgp = bg_head->next; free(bg_head); bg_head = bgp; } #if GREY if (resource.use_grey) { struct font *f; struct glyph *g; for (f = font_head; f != NULL; f = f->next) if ((f->flags & FONT_LOADED) && !(f->flags & FONT_VIRTUAL)) for (g = f->glyph; g <= f->glyph + f->maxchar; ++g) g->fg = NULL; } #endif /* GREY */ bg_current = NULL; fg_active = NULL; color_warned = False; } /* * All of the above, plus discard all scanned information. */ void full_reset_colors(void) { if (page_colors.stack != NULL) { size_t i; struct rgb *last_freed = &fg_initial; /* fprintf(stderr, "i: %d; last freed: %p\n", page_colors.size, &fg_initial); */ for (i = 0; i < page_colors.size; ++i) { if (page_colors.stack[i].colorstack != last_freed) { last_freed = page_colors.stack[i].colorstack; /* BUG ALERT: don't free &fg_initial, else segfault with changing foreground in xm_colorsel.c! */ if (last_freed != NULL && last_freed != &fg_initial) { /* fprintf(stderr, "freeing %d: %p\n", i, last_freed); */ free(last_freed); } } } free(page_colors.stack); page_colors.stack = NULL; } reset_colors(); } #endif /* COLOR */ /* * realloc_font allocates the font structure to contain (newsize + 1) * characters. */ void realloc_font(struct font *fontp, wide_ubyte newsize) { struct glyph *glyph; glyph = fontp->glyph = xrealloc(fontp->glyph, (unsigned int)(newsize + 1) * sizeof(struct glyph)); if (newsize > fontp->maxchar) memset((char *)(glyph + fontp->maxchar + 1), 0, (int)(newsize - fontp->maxchar) * sizeof(struct glyph)); maxchar = fontp->maxchar = newsize; } /* * realloc_virtual_font does the same thing for virtual fonts. */ void realloc_virtual_font(struct font *fontp, wide_ubyte newsize) { struct macro *macro; macro = fontp->macro = xrealloc(fontp->macro, (unsigned int)(newsize + 1) * sizeof(struct macro)); if (newsize > fontp->maxchar) memset((char *)(macro + fontp->maxchar + 1), 0, (int)(newsize - fontp->maxchar) * sizeof(struct macro)); maxchar = fontp->maxchar = newsize; } /* * load_font locates the t1 font or raster file and reads the index of * characters, plus whatever other preprocessing is done (depending on * the format). * * Returns True if sucessful, False if not. */ Boolean load_font(struct font *fontp #if DELAYED_MKTEXPK , Boolean load_font_now #endif ) { double fsize = fontp->fsize; int dpi = fsize + 0.5; char *font_found; int size_found; int magic; Boolean hushcs = resource.hush_chk; fontp->file = NULL; /* BUG ALERT: This used to be: * * if (--globals.ev.ctr == 0) { * read_events(EV_GE_IDLE); * } * force_statusline_update(); * XSync(DISP, False); * * The idea was to update the `loading fonts ...' popup. However, * calling read_events() here may call dvi_file_changed() if the * user clicks on the window, which calls file_exists_p(), and * that changes m_dvi_fp while it's still being used to read the * postamble (where load_font() is called from), which will cause * xdvi to crash! (bug #968127). * * Sadly, without this update, the `loading fonts' popup doesn't * appear before the main window comes up ... */ fontp->file = font_open( #if DELAYED_MKTEXPK load_font_now, #endif fontp, (const char **) &font_found, &size_found); #if DELAYED_MKTEXPK if (!load_font_now) return True; #endif #if FREETYPE if (fontp->ft != NULL) { /* if freetype font */ fontp->timestamp = ++current_timestamp; fontp->maxchar = maxchar = 255; fontp->set_char_p = set_ft_char; fontp->glyph = xmalloc (256 * sizeof (struct glyph)); memset((char *) fontp->glyph, 0, 256 * sizeof (struct glyph)); fontp->flags |= FONT_LOADED; if (font_found != NULL) { statusline_error(STATUS_MEDIUM, "Error: Can't find font %s; using %s instead. Expect ugly output.", fontp->fontname, font_found); force_statusline_update(); free(fontp->fontname); fontp->fontname = font_found; /* this has been allocated by font_open */ } return True; } #endif /* FREETYPE */ /* when it's not a freetype font, fontp->file == NULL means total failure */ if (fontp->file == NULL) { if (globals.ev.flags & EV_GE_NEWDOC) return False; fontp->flags |= FONT_LOADED; /* as loaded as it'll get */ XDVI_ERROR((stderr, "Can't find font %s.%dpk", fontp->fontname, dpi)); return False; } fontp->flags |= FONT_LOADED; if (font_found != NULL && strcmp(fontp->fontname, font_found) != 0) { /* some other font used - FIXME: is there a more efficient way than strcmp() for checking this? */ statusline_error(STATUS_MEDIUM, "Can't find pixel font %s; using %s instead at %d dpi.", fontp->fontname, font_found, dpi); force_statusline_update(); free(fontp->fontname); fontp->fontname = font_found; /* this has been allocated by font_open */ hushcs = True; } else if (!kpse_bitmap_tolerance((double)size_found, fsize)) { /* a different size used */ statusline_error(STATUS_MEDIUM, "Can't find pixel font %s at %d dpi; using %d dpi instead.", fontp->fontname, dpi, size_found); force_statusline_update(); } /* PK version of some font found */ fontp->fsize = size_found; fontp->timestamp = ++current_timestamp; fontp->maxchar = maxchar = 255; fontp->set_char_p = set_char; magic = get_bytes(fontp->file, 2); switch(magic) { case PK_MAGIC: read_PK_index(fontp, (wide_bool)hushcs); break; #ifdef USE_GF case GF_MAGIC: read_GF_index(fontp, (wide_bool)hushcs); break; #endif case VF_MAGIC: if (resource.omega) maxchar = read_VF_index(fontp, (wide_bool)hushcs); else (void)read_VF_index(fontp, (wide_bool)hushcs); break; default: XDVI_FATAL((stderr, "Cannot recognize format for font file %s", fontp->filename)); break; } if (fontp->flags & FONT_VIRTUAL) { if (!resource.omega) { while (maxchar > 0 && fontp->macro[maxchar].pos == NULL) { --maxchar; } if (maxchar < 255) { realloc_virtual_font(fontp, (wide_ubyte)maxchar); } } } else { while (maxchar > 0 && fontp->glyph[maxchar].addr == 0) --maxchar; if (maxchar < 255) { realloc_font(fontp, (wide_ubyte)maxchar); } } return True; } /* * MAGSTEPVALUE - If the given magnification is close to a \magstep * or a \magstephalf, then return twice the number of \magsteps. * Otherwise return NOMAGSTP. */ #define NOMAGSTP (-29999) #define NOBUILD 29999 static int magstepvalue(float *mag) { int m = 0; double fmag = *mag; double xmag = resource.pixels_per_inch; float margin = fmag * 0.002; if (fmag < resource.pixels_per_inch) for (;;) { if (xmag - fmag < margin && -(xmag - fmag) < margin) { *mag = xmag; return m; } if (xmag < fmag) break; xmag *= 0.9128709292; --m; } else for (;;) { if (xmag - fmag < margin && -(xmag - fmag) < margin) { *mag = xmag; return m; } if (xmag > fmag) break; xmag *= 1.095445115; ++m; } return NOMAGSTP; } /* * reuse_font recursively sets the flags for font structures being reused. */ static void reuse_font(struct font *fontp) { struct font **fp; struct tn *tnp; if (fontp->flags & FONT_IN_USE) return; fontp->flags |= FONT_IN_USE; if (resource.list_fonts) printf("xdvi: (reusing) %s at %d dpi\n", fontp->fontname, (int)(fontp->fsize + 0.5)); if (fontp->flags & FONT_VIRTUAL) { for (fp = fontp->vf_table; fp < fontp->vf_table + VFTABLELEN; ++fp) if (*fp != NULL) reuse_font(*fp); for (tnp = fontp->vf_chain; tnp != NULL; tnp = tnp->next) reuse_font(tnp->fontp); } } /* * define_font reads the rest of the fntdef command and then reads in * the specified pixel file, adding it to the global linked-list holding * all of the fonts used in the job. */ struct font * define_font( #if DELAYED_MKTEXPK Boolean read_fonts, /* reading font definitions */ Boolean initialize_fonts, /* also initializing internal data structures for fonts */ #else Boolean load_font_now, /* only scanning, or also loading the font? */ #endif FILE *file, wide_ubyte cmnd, struct font *vfparent, /* vf parent of this font, or NULL */ struct font **tntable, /* table for low TeXnumbers */ unsigned int tn_table_len, /* length of table for TeXnumbers */ struct tn **tn_headpp, /* addr of head of list of TeXnumbers */ Boolean *not_found_flag) /* signal that font hasn't been found */ { unsigned int TeXnumber; struct font *fontp; float fsize; double scale_dimconv; long checksum; int scale; int design; int magstepval; int len; char *fontname; int size; TeXnumber = get_bytes(file, (int)cmnd - FNTDEF1 + 1); checksum = get_bytes(file, 4); scale = get_bytes(file, 4); design = get_bytes(file, 4); len = get_byte(file); len += get_byte(file); /* sequence point in the middle */ #if DELAYED_MKTEXPK if (!read_fonts) { get_bytes(file, len); return NULL; } #else if (!load_font_now) return NULL; #endif fontname = xmalloc((unsigned)len + 1); (void)fread(fontname, sizeof(char), len, file); fontname[len] = '\0'; if (globals.debug & DBG_PK) printf("xdvi: Define font \"%s\" scale=%d design=%d number=%d\n", fontname, scale, design, TeXnumber); if (vfparent == NULL) { fsize = 0.001 * scale / design * magnification * resource.pixels_per_inch; scale_dimconv = dimconv; } else { /* * The scaled size is given in units of vfparent->scale * 2 ** -20 * SPELL units, so we convert it into SPELL units by multiplying by * vfparent->dimconv. * The design size is given in units of 2 ** -20 pt, so we convert * into SPELL units by multiplying by * (resource.pixels_per_inch * 2**16) / (72.27 * 2**20). */ fsize = (72.27 * (1 << 4)) * vfparent->dimconv * scale / design; scale_dimconv = vfparent->dimconv; } magstepval = magstepvalue(&fsize); size = fsize + 0.5; /* * reuse font if possible */ for (fontp = font_head;; fontp = fontp->next) { if (fontp == NULL) { /* if font doesn't exist yet */ if (resource.list_fonts) printf("xdvi: %s at %d dpi\n", fontname, (int)(fsize + 0.5)); fontp = xmalloc((unsigned)sizeof(struct font)); fontp->fontname = fontname; fontp->fsize = fsize; fontp->magstepval = magstepval; fontp->file = NULL; /* needed for virtual/freetype fonts */ fontp->filename = NULL; /* needed for freetype fonts */ fontp->checksum = checksum; fontp->flags = FONT_IN_USE; fontp->dimconv = scale * scale_dimconv / (1 << 20); fontp->set_char_p = load_n_set_char; #if FREETYPE fontp->ft = NULL; /* pixsize = scaled size of the font in pixels, * = scale * [vfparent->]dimconv / (1 << 16). */ fontp->pixsize = (vfparent != NULL ? vfparent->dimconv : dimconv) * scale / (1 << 16); #endif if (vfparent == NULL) if (!load_font(fontp #if DELAYED_MKTEXPK , initialize_fonts #endif )) { if (globals.ev.flags & EV_GE_NEWDOC) { /* if aborting */ free(fontname); free(fontp); return NULL; } *not_found_flag = True; } fontp->next = font_head; font_head = fontp; break; } if (strcmp(fontname, fontp->fontname) == 0 && size == (int)(fontp->fsize + 0.5)) { /* if font already in use */ reuse_font(fontp); free(fontname); break; } } if (TeXnumber < tn_table_len) tntable[TeXnumber] = fontp; else { struct tn *tnp; tnp = xmalloc((unsigned)sizeof(struct tn)); tnp->next = *tn_headpp; *tn_headpp = tnp; tnp->TeXnumber = TeXnumber; tnp->fontp = fontp; } return fontp; } /* * process_preamble reads the information in the preamble and stores * it into global variables for later use. */ Boolean process_preamble(FILE *fp, dviErrFlagT *errflag) { ubyte k; static char job_id[300]; TRACE_FILES((stderr, "process_preamble: fp = %p, errflag = %d", (void *)fp, *errflag)); if (get_byte(fp) != PRE) { *errflag = NOT_A_DVI_FILE; TRACE_FILES((stderr, "process_preamble: fp = %p, errflag = %d, returning False", (void *)fp, *errflag)); return False; } if (get_byte(fp) != 2) { *errflag = WRONG_DVI_VERSION; TRACE_FILES((stderr, "process_preamble: fp = %p, errflag = %d, returning False", (void *)fp, *errflag)); return False; } numerator = get_bytes(fp, 4); denominator = get_bytes(fp, 4); magnification = get_bytes(fp, 4); dimconv = (((double)numerator * magnification) / ((double)denominator * 1000.)); dimconv = dimconv * (((long)resource.pixels_per_inch) << 16) / 254000; tpic_conv = resource.pixels_per_inch * magnification / 1000000.0; k = get_byte(fp); (void)fread(job_id, sizeof(char), (int)k, fp); job_id[k] = '\0'; TRACE_FILES((stderr, "process_preamble: fp = %p, errflag = %d, returning True", (void *)fp, *errflag)); return True; } /* * find_postamble locates the beginning of the postamble * and leaves the file ready to start reading at that location. */ #define TMPSIZ 516 /* 4 trailer bytes + 512 junk bytes allowed */ Boolean find_postamble(FILE *fp, dviErrFlagT *errflag) { long pos; ubyte temp[TMPSIZ]; ubyte *p; ubyte *p1; ubyte byte; TRACE_FILES((stderr, "find_postamble on fp: %p", (void *)fp)); fseek(fp, 0L, SEEK_END); pos = ftell(fp) - TMPSIZ; if (pos < 0) pos = 0; fseek(fp, pos, SEEK_SET); p = temp + fread((char *)temp, sizeof(char), TMPSIZ, fp); for (;;) { p1 = p; while (p1 > temp && *(--p1) != TRAILER); p = p1; while (p > temp && *(--p) == TRAILER); if (p <= p1 - 4) break; /* found 4 TRAILER bytes */ if (p <= temp) { *errflag = DVI_CORRUPTED; TRACE_FILES((stderr, "find_postamble: returning FALSE")); return False; } } pos += p - temp; byte = *p; while (byte == TRAILER) { fseek(fp, --pos, SEEK_SET); byte = get_byte(fp); } if (byte != 2) { *errflag = WRONG_DVI_VERSION; TRACE_FILES((stderr, "find_postamble: returning FALSE")); return False; } fseek(fp, pos - 4, SEEK_SET); fseek(fp, get_lbytes(fp, 4), SEEK_SET); TRACE_FILES((stderr, "find_postamble: returning TRUE")); return True; } Boolean set_paper_type(const char *arg) { const char *arg1; char temp[21]; const char **p; char *q; const char **paper_types = get_paper_types(); size_t paper_types_size = get_paper_types_size(); if (*arg == '+') { ++arg; ignore_papersize_specials = True; } if (strlen(arg) > sizeof(temp) - 1) return False; q = temp; for (;;) { /* convert to lower case */ char c = *arg++; if (c >= 'A' && c <= 'Z') c ^= ('a' ^ 'A'); *q++ = c; if (c == '\0') break; } arg = temp; /* perform substitutions */ for (p = paper_types; p < paper_types + paper_types_size; p += 2) { if (strcmp(temp, *p) == 0) { arg = p[1]; break; } } arg1 = strchr(arg, 'x'); if (arg1 == NULL) return False; m_paper_unshrunk_w = atopix(arg); m_paper_unshrunk_h = atopix(arg1 + 1); globals.grid_paper_unit = atopixunit(arg); return (m_paper_unshrunk_w != 0 && m_paper_unshrunk_h != 0); } /* * read_postamble reads the information in the postamble from fp, * storing it into global variables. * It also takes care of reading in all of the pixel files for the fonts * used in the job. * * FIXME: Would be better (speed up initialization when needing to generate fonts, * and allow to open window on first page) if the font loading was done on-demand later! */ Boolean read_postamble(FILE *fp, dviErrFlagT *errflag, #if DELAYED_MKTEXPK Boolean read_fonts, Boolean initialize_fonts #else Boolean load_fonts #endif ) { ubyte cmnd; Boolean font_not_found = False; struct font *fontp; #if DELAYED_MKTEXPK int tmp_total_pages; unsigned long tmp_numerator = numerator; unsigned long tmp_denominator = denominator; unsigned long tmp_magnification = magnification; unsigned int tmp_dvi_unshrunk_page_w, tmp_dvi_unshrunk_page_h; long tmp_last_page_offset; TRACE_FILES((stderr, "read_postamble: reading %p (%d, %d)", (void *)fp, read_fonts, initialize_fonts)); if (read_fonts && initialize_fonts) { /* clear existing font table */ memset((char *)tn_table, 0, (int)sizeof tn_table); free_vf_chain(tn_head); tn_head = NULL; for (fontp = font_head; fontp != NULL; fontp = fontp->next) fontp->flags &= ~FONT_IN_USE; } #else /* DELAYED_MKTEXPK */ TRACE_FILES((stderr, "read_postamble: reading %p (%d)", (void *)fp, load_fonts)); /* clear existing font table */ memset((char *)tn_table, 0, (int)sizeof tn_table); free_vf_chain(tn_head); tn_head = NULL; for (fontp = font_head; fontp != NULL; fontp = fontp->next) fontp->flags &= ~FONT_IN_USE; #endif /* DELAYED_MKTEXPK */ if (get_byte(fp) != POST) { *errflag = POSTAMBLE_NO_POST; TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } #if DELAYED_MKTEXPK tmp_last_page_offset = get_bytes(fp, 4); if (read_fonts && initialize_fonts) m_last_page_offset = tmp_last_page_offset; if (tmp_numerator != get_bytes(fp, 4) || tmp_denominator != get_bytes(fp, 4) || tmp_magnification != get_bytes(fp, 4)) { *errflag = POSTAMBLE_NO_MATCH; TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } else if (read_fonts && initialize_fonts) { numerator = tmp_numerator; denominator = tmp_denominator; magnification = tmp_magnification; } /* read largest box height and width */ tmp_dvi_unshrunk_page_h = (spell_conv(get_lbytes(fp, 4)) >> 16) + resource.yoffset_int; tmp_dvi_unshrunk_page_w = (spell_conv(get_lbytes(fp, 4)) >> 16) + resource.xoffset_int; (void)get_bytes(fp, 2); /* max stack size */ tmp_total_pages = get_bytes(fp, 2); if (read_fonts && initialize_fonts) { dvi_unshrunk_page_h = tmp_dvi_unshrunk_page_h; if (dvi_unshrunk_page_h < m_paper_unshrunk_h) dvi_unshrunk_page_h = m_paper_unshrunk_h; dvi_unshrunk_page_w = tmp_dvi_unshrunk_page_w; if (dvi_unshrunk_page_w < m_paper_unshrunk_w) dvi_unshrunk_page_w = m_paper_unshrunk_w; total_pages = tmp_total_pages; } #else /* DELAYED_MKTEXPK */ m_last_page_offset = get_bytes(fp, 4); if (numerator != get_bytes(fp, 4) || denominator != get_bytes(fp, 4) || magnification != get_bytes(fp, 4)) { *errflag = POSTAMBLE_NO_MATCH; TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } /* read largest box height and width */ dvi_unshrunk_page_h = (spell_conv(get_lbytes(fp, 4)) >> 16) + resource.yoffset_int; if (dvi_unshrunk_page_h < m_paper_unshrunk_h) dvi_unshrunk_page_h = m_paper_unshrunk_h; dvi_unshrunk_page_w = (spell_conv(get_lbytes(fp, 4)) >> 16) + resource.xoffset_int; if (dvi_unshrunk_page_w < m_paper_unshrunk_w) dvi_unshrunk_page_w = m_paper_unshrunk_w; (void)get_bytes(fp, 2); /* max stack size */ total_pages = get_bytes(fp, 2); #endif /* DELAYED_MKTEXPK */ /* read font definitions */ while ((cmnd = get_byte(fp)) >= FNTDEF1 && cmnd <= FNTDEF4) { struct font *f = define_font( #if DELAYED_MKTEXPK read_fonts, initialize_fonts, #else load_fonts, #endif fp, cmnd, (struct font *)NULL, tn_table, TNTABLELEN, &tn_head, &font_not_found); if ( #if DELAYED_MKTEXPK read_fonts && initialize_fonts #else load_fonts #endif && f == NULL) { TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } #if !DELAYED_MKTEXPK else if (!load_fonts) { /* return early */ TRACE_FILES((stderr, "read_postamble: returning TRUE")); return True; } #endif } if (cmnd != POSTPOST) { *errflag = POSTAMBLE_NON_FNTDEF; TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } if ( #if DELAYED_MKTEXPK read_fonts && initialize_fonts && #endif font_not_found) { *errflag = NOT_ALL_PIXEL_FILES_FOUND; TRACE_FILES((stderr, "read_postamble: returning FALSE")); return False; } #if DELAYED_MKTEXPK if (read_fonts && initialize_fonts) free_unused_fonts(); #else free_unused_fonts(); #endif TRACE_FILES((stderr, "read_postamble: returning TRUE")); return True; } static Boolean prepare_pages(dviErrFlagT *errflag) { int i; long offset; TRACE_FILES((stderr, "calling pageinfo_deallocate")); pageinfo_deallocate(); TRACE_FILES((stderr, "pageinfo_allocate for %d pages", total_pages + 1)); pageinfo_allocate(total_pages + 1); pageinfo_set_page_width(total_pages, m_paper_unshrunk_w); pageinfo_set_page_height(total_pages, m_paper_unshrunk_h); pageinfo_set_window_width(total_pages, dvi_unshrunk_page_w); pageinfo_set_window_height(total_pages, dvi_unshrunk_page_h); pageinfo_set_offset(total_pages - 1, m_last_page_offset); /* * Follow back pointers through pages in the DVI file, * storing the offsets in the pageinfo table. */ for (offset = m_last_page_offset, i = total_pages; i > 0; i--) { fseek(globals.dvi_file.bak_fp, offset, SEEK_SET); if (get_byte(globals.dvi_file.bak_fp) != BOP) { *errflag = NO_BOP_AT_PAGEDESC; return False; } pageinfo_set_offset(i-1, offset); /* from c_0, read count0, the TeX page number */ pageinfo_set_number(i-1, get_bytes(globals.dvi_file.bak_fp, 4)); /* skip c_1 to c_9 */ fseek(globals.dvi_file.bak_fp, 9*4L, SEEK_CUR); /* next 4 byte contain offset to previous bop */ offset = get_bytes(globals.dvi_file.bak_fp, 4); } /* If not prescanning, initialize page sizes. */ if (!resource.prescan) { for (i = 0; i < total_pages; ++i) { pageinfo_set_page_width(i, m_paper_unshrunk_w); pageinfo_set_page_height(i, m_paper_unshrunk_h); pageinfo_set_window_width(i, dvi_unshrunk_page_w); pageinfo_set_window_height(i, dvi_unshrunk_page_h); } } return True; } void init_page(void) { if (globals.dvi_file.bak_fp == NULL) return; globals.page.unshrunk_w = pageinfo_get_page_width(current_page); globals.page.unshrunk_h = pageinfo_get_page_height(current_page); globals.page.w = ROUNDUP(globals.page.unshrunk_w, mane.shrinkfactor) + 2; globals.page.h = ROUNDUP(globals.page.unshrunk_h, mane.shrinkfactor) + 2; TRACE_FILES((stderr, "init_page: setting globals.page.w = %d, globals.page.h = %d", globals.page.w, globals.page.h)); } #ifndef S_ISDIR #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) #endif static char *m_tmp_dvi_name = NULL; /* name of backup file for useTempFp */ /* access function for backup file name */ char *get_tmp_dvi_name(void) { return m_tmp_dvi_name; } static void remove_tmp_dvi_file(void *dummy) { UNUSED(dummy); if (m_tmp_dvi_name != NULL) { unlink(m_tmp_dvi_name); free(m_tmp_dvi_name); } m_tmp_dvi_name = NULL; } static FILE * make_backup_fp(FILE *source_fp, FILE *target_fp) { static Boolean first_time = True; static int tmp_fd = 0; #if !HAVE_FTRUNCATE /* in this case, we can't use ftruncate() on the existing temp file - just close the existing one, and set flag to open a new one */ remove_tmp_dvi_file(NULL); if (target_fp != NULL) fclose(target_fp); /* make sure we use a new temp file, else we'd have a race condition after closing it */ first_time = True; #endif if (first_time) { /* doesn't exist yet, create it */ if ((tmp_fd = xdvi_temp_fd(&m_tmp_dvi_name)) == -1) { XDVI_ERROR((stderr, "error creating temporary file - disabling `useTempFp'.")); resource.use_temp_fp = False; remove_tmp_dvi_file(NULL); return NULL; } /* fprintf(stderr, "temporary file name: |%s|, %d\n", m_tmp_dvi_name, tmp_fd); */ TRACE_EVENTS((stderr, "Created temp file: |%s|\n", m_tmp_dvi_name)); if ((target_fp = try_fdopen(tmp_fd, "wb+")) == NULL) { XDVI_ERROR((stderr, "error opening temporary file (%s) - disabling `useTempFp'.", strerror(errno))); resource.use_temp_fp = False; remove_tmp_dvi_file(NULL); return NULL; } first_time = False; } else { /* if not first time, truncate the existing file, and position both files at beginning */ ASSERT(target_fp != NULL, ""); ASSERT(source_fp != NULL, ""); #if HAVE_FTRUNCATE if (ftruncate(tmp_fd, 0) < 0) { XDVI_ERROR((stderr, "Couldn't truncate file %s: %s - disabling `useTempFp'; target_fp: %p.", m_tmp_dvi_name, strerror(errno), target_fp)); resource.use_temp_fp = False; remove_tmp_dvi_file(NULL); fclose(target_fp); return NULL; } #endif fseek(target_fp, 0L, SEEK_SET); fseek(source_fp, 0L, SEEK_SET); } /* copy the file */ if (!copy_fp(source_fp, target_fp)) { XDVI_ERROR((stderr, "Error creating temporary file: %s\n" "- disabling `useTempFp'.", strerror(errno))); remove_tmp_dvi_file(NULL); resource.use_temp_fp = False; fclose(target_fp); target_fp = NULL; } /* rewind both files, else DVI parsing will fail! */ if (target_fp != NULL) { fflush(target_fp); } fseek(source_fp, 0L, SEEK_SET); if (target_fp != NULL) { fseek(target_fp, 0L, SEEK_SET); } return target_fp; } static Boolean file_exists_p(const char *path, dviErrFlagT *errflag) { TRACE_FILES((stderr, "file_exists_p for |%s|", path)); *errflag = UNKNOWN_ERROR; if ((m_dvi_fp = XFOPEN(path, OPEN_MODE)) == NULL) { /* fprintf(stderr, "after internal_open_dvi1: xfopen\n"); */ *errflag = FILE_DOESNT_EXIST; return False; } TRACE_FILES((stderr, "m_dvi_fp for |%s| = %p", path, (void *)m_dvi_fp)); /* fprintf(stderr, "after internal_open_dvi2: xfopen\n"); */ /* shouldn't happen */ if (fstat(fileno(m_dvi_fp), &fstatbuf) != 0 || S_ISDIR(fstatbuf.st_mode)) { /* if it's a directory */ *errflag = FILE_IS_DIRECTORY; fclose(m_dvi_fp); m_dvi_fp = NULL; return False; } /* If file has zero size, something has gone wrong with downloading it, and the user should already have been warned about that; just return in this case. TODO: can it still happen that we try to load such a file as .dvi file? (Will exit with `draw_part: unknown op-code xyz' or some such). In this case, it would be better to look at the preamble before entering the drawing loop. */ if (fstatbuf.st_size == 0) { *errflag = FILE_HAS_ZERO_SIZE; fclose(m_dvi_fp); m_dvi_fp = NULL; return False; } return True; } /* * internal_init_dvi is the main subroutine for reading the startup * information from the dvi file. */ static Boolean internal_init_dvi(dviErrFlagT *errflag, #if DELAYED_MKTEXPK Boolean read_fonts, Boolean initialize_fonts #else Boolean load_fonts #endif ) { char *icon_name = NULL, *title_name = NULL; have_src_specials = False; TRACE_FILES((stderr, "internal_init_dvi, globals.dvi_file.bak_fp = %p", (void *)globals.dvi_file.bak_fp)); if (!process_preamble(globals.dvi_file.bak_fp, errflag) || !find_postamble(globals.dvi_file.bak_fp, errflag) #if DELAYED_MKTEXPK || !read_postamble(globals.dvi_file.bak_fp, errflag, read_fonts, initialize_fonts) #else || !read_postamble(globals.dvi_file.bak_fp, errflag, load_fonts) || !prepare_pages(errflag) #endif ) { return False; } #if DELAYED_MKTEXPK if (!read_fonts || !initialize_fonts) /* return early */ return True; if (!prepare_pages(errflag)) return False; #endif if (current_page >= total_pages) current_page = total_pages - 1; globals.warn_spec_now = resource.warn_spec; globals.src.fwd_box_page = -1; search_reset_info(); if (globals.pausing.num_save != NULL) { free(globals.pausing.num_save); globals.pausing.num_save = NULL; } if (resource.pause && total_pages > 0) { globals.pausing.num_save = xmalloc(total_pages * sizeof *globals.pausing.num_save); memset(globals.pausing.num_save, 0, total_pages * sizeof *globals.pausing.num_save); } init_prescan(); /* this allocates icon_name and title_name */ get_icon_and_title(globals.dvi_name, &icon_name, &title_name); set_icon_and_title(icon_name, title_name); free(icon_name); free(title_name); icon_name = title_name = NULL; #if defined(MOTIF) && HAVE_XPM tb_check_navigation_sensitivity(current_page); #endif refresh_pagelist(total_pages, current_page); return True; } /* * internal_open_dvi does the real opening of the dvi file, and sets * globals.dvi_file.time. It returns True on success, and sets m_dvi_fp and globals.dvi_file.bak_fp. */ Boolean internal_open_dvi(const char *path, dviErrFlagT *errflag, #if DELAYED_MKTEXPK Boolean read_fonts, Boolean initialize_fonts #else Boolean load_fonts #endif ) { /* FILE *tmp_fp = NULL; */ /* static FILE *bak_fp = NULL; /\* re-use the temporary backup fp *\/ */ /* fprintf(stderr, "------------ opening: |%s|\n", path); */ #if DELAYED_MKTEXPK TRACE_FILES((stderr, "internal_open_dvi for |%s|; loading fonts: %d, %d", path, read_fonts, initialize_fonts)); #else TRACE_FILES((stderr, "internal_open_dvi for |%s|", path)); #endif close_old_filep(); if (!file_exists_p(path, errflag)) { /* this should set fstatbuf.st_mtime */ return False; } if (!resource.use_temp_fp || (globals.dvi_file.bak_fp = make_backup_fp(m_dvi_fp, globals.dvi_file.bak_fp)) == NULL) { globals.dvi_file.bak_fp = m_dvi_fp; } register_exit_handler(remove_tmp_dvi_file, NULL); globals.dvi_file.time = fstatbuf.st_mtime; if (!internal_init_dvi(errflag, #if DELAYED_MKTEXPK read_fonts, initialize_fonts #else load_fonts #endif )) { return False; } #if COLOR full_reset_colors(); #endif /* COLOR */ reset_papersize_special(); TRACE_FILES((stderr, "internal_open_dvi: SUCCESS!")); return True; } /* check whether `filename' is a DVI file, by checking if it exists, and if so, opening it and trying to read a DVI preamble from it: */ static char * is_dvi_file(const char *filename) { FILE *fp; struct stat statbuf; char *full_pathname; dviErrFlagT unused_error; TRACE_FILES((stderr, "is_dvi_file %s", filename)); TRACE_HTEX((stderr, "filename: |%s|", filename)); /* used to append `.dvi' if not already present, but that was a bad idea - if we have both foo.2 and foo.2.dvi, user will want to open `foo.2' (with some appropriate application) if the link points to that filename. This means that we need to have different semantics for filenames on the command-line and filenames in hyperlinks; the latter *must* specify an extension, the former may omit the extension and default to DVI files. */ /* if ((full_filename = filename_append_dvi(filename)) == NULL) { */ /* free(full_filename); */ /* return NULL; */ /* } */ /* TRACE_HTEX((stderr, "full_filename: |%s|\n", full_filename)); */ if ((full_pathname = find_file(filename, &statbuf, kpse_program_text_format)) == NULL) { return NULL; } else { char *tmp = canonicalize_path(full_pathname); free(full_pathname); full_pathname = tmp; } TRACE_HTEX((stderr, "is_dvi_file: full_pathname: |%s|", full_pathname)); if ((fp = XFOPEN(full_pathname, OPEN_MODE)) == NULL) { free(full_pathname); return NULL; } if (!process_preamble(fp, &unused_error)) { free(full_pathname); fclose(fp); return NULL; } fclose(fp); return full_pathname; } static void report_open_error(const char *msg, const char *filename, dviErrFlagT errflag) { const char *errmsg; switch(errflag) { case FILE_HAS_ZERO_SIZE: errmsg = "File has zero size"; break; case FILE_DOESNT_EXIST: errmsg = "No such file"; break; case FILE_IS_DIRECTORY: errmsg = "Is a directory"; break; default: errmsg = "An unknown error occurred"; break; } XDVI_ERROR((stderr, "%s: %s: %s", msg, filename, errmsg)); } /* Implements the algorithm for opening a DVI file from the command line. This is similar to `open_dvi_file()' in non-k xdvi. If the file does not already have `.dvi' extension, append `.dvi' and set tried_dvi_ext to True. Try to open this file. If the file doesn't exist, try the original file name. If this file doesn't exist either, exit with an error message `No such file or directory'. If tried_dvi_ext == True, also report that file.dvi didn't exist either. (A later function will check if the file really is a DVI file, and will use tried_dvi_ext for the same purpose). */ char * find_dvi_file(const char *filename, Boolean *tried_dvi_ext, Boolean from_file_history) { char *new_filename; size_t len; dviErrFlagT errflag; ASSERT(filename != NULL, "Filename argument in find_dvi_file() musn't be NULL"); len = strlen(filename); if (len < sizeof(".dvi") || strcmp(filename + len - sizeof(".dvi") + 1, ".dvi") != 0) { /* doesn't already have .dvi extension */ TRACE_HTEX((stderr, "|%s| doesn't have .dvi extension, appending ...", filename)); new_filename = xstrdup(filename); new_filename = xstrcat(new_filename, ".dvi"); *tried_dvi_ext = True; if (file_exists_p(new_filename, &errflag)) { /* file exists */ char *expanded_filename = expand_filename(new_filename, USE_CWD_PATH); free(new_filename); return expanded_filename; } else { /* don't report an error; will try verbatim filename next */ free(new_filename); } } /* try verbatim filename (might be strange things like `foo.wdvi') */ if (file_exists_p(filename, &errflag)) { char *expanded_filename = expand_filename(filename, USE_CWD_PATH); return expanded_filename; } else { if (*tried_dvi_ext) { if (!from_file_history) { XDVI_FATAL((stderr, "%s: %s, and %s.dvi doesn't exist either.", filename, get_dvi_error(errflag), filename)); } else { popup_message(globals.widgets.top_level, MSG_ERR, NULL, "Could not open \"%s\": %s.\n", filename, get_dvi_error(errflag)); } } else { if (!from_file_history) { XDVI_FATAL((stderr, "%s: %s.", filename, get_dvi_error(errflag))); } /* else: file is from history; this is at startup, where we may loop through the history until we find a usable file. Don't report an error in this case. */ } } return NULL; } /* * A wrapper for open_dvi_file that can also deal with remote files/URLs, and other * file types. Returns the (newly malloc'ed) new dvi file name if it succeeds, NULL else. */ char * open_dvi_file_wrapper(const char *filename, Boolean from_command_line, Boolean open_new_instance, Boolean *tried_dvi_ext, Boolean from_file_history) { char *real_filename = NULL; char *new_dvi_name = NULL; char canonical_path[MAXPATHLEN + 1]; if (from_command_line) { TRACE_HTEX((stderr, "filename IS from commandline")); /* if filename is from command-line, we want to treat the file as a DVI file always (and NOT launch the browser or other programs; that'd just confuse people, who meant to launch *xdvi*). `find_dvi_file' tries to locate the file and does all error handling; on success, it returns a fully expanded filename. */ real_filename = find_dvi_file(filename, tried_dvi_ext, from_file_history); /* this allocates real_filename */ if (real_filename == NULL) return False; TRACE_HTEX((stderr, "filename |%s| %p from commandline;\ndvi_name: |%s|,\nfilename: |%s|%p", real_filename, real_filename, globals.dvi_name, filename, (void *)filename)); new_dvi_name = xstrdup(REALPATH(real_filename, canonical_path)); free(real_filename); TRACE_FILES((stderr, "new_dvi_name: |%s|", new_dvi_name)); return new_dvi_name; } else { /* if it's not from the command line (e.g. result of clicking Mouse-1 on a link); in this case we might fall back to using the browser. Check whether it's a local file: */ const char *filename_no_prefix; char *expanded_filename; TRACE_HTEX((stderr, "filename NOT from commandline")); if ((filename_no_prefix = is_local_file(filename)) != NULL) { /* if it's a local file, check whether it's a DVI file: */ if ((expanded_filename = is_dvi_file(filename_no_prefix)) != NULL) { /* yes, open it */ if (open_dvi_file(expanded_filename, open_new_instance)) { TRACE_FILES((stderr, "success: %p |%s|", expanded_filename, expanded_filename)); if (!open_new_instance) { new_dvi_name = expand_filename_append_dvi(expanded_filename, USE_DVI_PATH, True); TRACE_FILES((stderr, "new_dvi_name: %p |%s|", (void*)new_dvi_name, new_dvi_name)); } } free(expanded_filename); return new_dvi_name; } else { /* local file, but not a DVI file; try other viewers for this MIME type: */ TRACE_HTEX((stderr, "%s is NOT a DVI file", filename_no_prefix)); launch_program(filename); return NULL; } } else { /* not a local file, retrieve it with the browser: */ launch_browser(filename); return NULL; } } } static Boolean open_dvi_file(const char *filename, Boolean open_new_instance) { Boolean retval = True; char *anchor_name = resource.anchor_pos; TRACE_HTEX((stderr, "open_dvi_file: |%s| + |%s|", filename, anchor_name == NULL ? "" : anchor_name)); if (open_new_instance) { launch_xdvi(filename, anchor_name); } else { dviErrFlagT errflag = NO_ERROR; TRACE_HTEX((stderr, "internal_open_dvi: |%s|", filename)); if (!internal_open_dvi(filename, &errflag, True #if DELAYED_MKTEXPK , TRUE #endif )) { report_open_error("Cannot open DVI file", filename, errflag); retval = False; } } return retval; } /** ** form_dvi_property forms the property used to exhibit the dvi file name ** used as a window property (used for source specials). **/ void form_dvi_property(void) { #if 0 size_t len; unsigned long ino; int i; #endif if (m_dvi_fp == NULL) return; if (dvi_property != NULL) free(dvi_property); dvi_property_length = strlen(globals.dvi_name) + 1; /* also copy the terminating 0 */ dvi_property = xmalloc(dvi_property_length); /* NOTE: we don't use dvi_inode like non-k xdvi, since xdvik keeps closer track of when the path points to a different inode. */ strcpy(dvi_property, globals.dvi_name); } /* access for m_dvi_fp */ void close_old_filep(void) { if (m_dvi_fp != NULL) { fclose(m_dvi_fp); m_dvi_fp = NULL; if (!resource.use_temp_fp) globals.dvi_file.bak_fp = NULL; } } /** ** Check for changes in dvi file. ** Return True if file has changed, False else. **/ Boolean dvi_file_changed(void) { TRACE_FILES((stderr, "dvi_file_changed: fp = %p?", (void *)m_dvi_fp)); /* fprintf(stderr, "m_dvi_fp3: %p (%s)\n", m_dvi_fp, globals.dvi_name); */ if (m_dvi_fp == NULL) { TRACE_FILES((stderr, "m_dvi_fp == NULL")); if (stat(globals.dvi_name, &fstatbuf) == 0 && fstatbuf.st_mtime != globals.dvi_file.time) { TRACE_FILES((stderr, "file changed")); if (resource.use_temp_fp) { dviErrFlagT errflag = NO_ERROR; #if !DELAYED_MKTEXPK if (resource.watch_file == 0.0) statusline_info(STATUS_MEDIUM, "File changed ..."); TRACE_FILES((stderr, "returning FALSE")); #endif if (file_exists_p(globals.dvi_name, &errflag) && process_preamble(m_dvi_fp, &errflag) && find_postamble(m_dvi_fp, &errflag) && read_postamble(m_dvi_fp, &errflag, False #if DELAYED_MKTEXPK , False #endif )) { TRACE_FILES((stderr, "File OK, reloading ...")); globals.ev.flags |= EV_RELOAD; return True; } else { #if DELAYED_MKTEXPK if (resource.watch_file == 0.0) statusline_info(STATUS_MEDIUM, "File corrupted (click on window to reload) ..."); TRACE_FILES((stderr, "returning FALSE")); #endif return False; } } /* Bug alert: Don't set EV_RELOAD again here, else xdvi can go into a stretch of time where it again and again tries to reload a file even if the user doesn't click on the canvas. */ /* else { globals.ev.flags |= EV_RELOAD; } */ TRACE_FILES((stderr, "returning TRUE")); return True; } else { TRACE_FILES((stderr, "file not changed")); } } /* BUG ALERT: Don't use fstat(fileno(m_dvi_fp) here; if file hase disappeared, this won't report an error! */ else if (stat(globals.dvi_name, &fstatbuf) != 0 /* stat failed ... */ || fstatbuf.st_mtime != globals.dvi_file.time /* ... or different timestamp, reload: */) { dviErrFlagT errflag = NO_ERROR; TRACE_FILES((stderr, "Stat failed, or different timestamp ...")); globals.dvi_file.time = 0; /* force reload next time also if stat failed */ if (resource.use_temp_fp) { /* in this case, reload only if file has been written completely */ if (resource.watch_file == 0.0) { statusline_info(STATUS_MEDIUM, "File corrupted (click on window to reload) ..."); globals.cursor.flags |= CURSOR_CORRUPTED; globals.ev.flags |= EV_CURSOR; } else { statusline_info(STATUS_MEDIUM, "File corrupted (will try to reload) ..."); } close_old_filep(); if (file_exists_p(globals.dvi_name, &errflag) && process_preamble(m_dvi_fp, &errflag) && find_postamble(m_dvi_fp, &errflag) && read_postamble(m_dvi_fp, &errflag, False #if DELAYED_MKTEXPK , False #endif )) { TRACE_FILES((stderr, "File OK, reloading ...")); globals.ev.flags |= EV_RELOAD; return True; } else { TRACE_FILES((stderr, "NO successful load: %s", get_dvi_error(errflag))); /* fprintf(stderr, "=========== NO successful load: %s\n", get_dvi_error(errflag)); */ return False; } } else { TRACE_FILES((stderr, "Not using temp fp, reloading...")); globals.ev.flags |= EV_RELOAD; return True; } } return False; } /** ** Reload the dvi file (unconditionally). Return True on success, False else. **/ Boolean load_dvi_file( #if !DELAYED_MKTEXPK Boolean load_fonts, #endif dviErrFlagT *errflag) { unsigned int old_page_w, old_page_h; static ino_t dvi_inode = 0; TRACE_FILES((stderr, "load_dvi_file: going to read %p", (void *)m_dvi_fp)); if (resource.use_temp_fp && m_dvi_fp != NULL) { /* in this case, reload only if file has been written completely */ *errflag = NO_ERROR; fseek(m_dvi_fp, 0L, SEEK_SET); if (!process_preamble(m_dvi_fp, errflag) || !find_postamble(m_dvi_fp, errflag) || !read_postamble(m_dvi_fp, errflag, #if DELAYED_MKTEXPK False, False #else True #endif )) { TRACE_FILES((stderr, "reading of %p failed: %s!", (void *)m_dvi_fp, get_dvi_error(*errflag))); return False; } } old_page_w = globals.page.w; old_page_h = globals.page.h; *errflag = NO_ERROR; #if DELAYED_MKTEXPK /* use same trick with reading postamble twice to first find names of PK fonts that need to be created. */ reset_missing_font_count(); kpse_set_program_enabled(kpse_any_glyph_format, False, kpse_src_compile); #endif if (!internal_open_dvi(globals.dvi_name, errflag, #if DELAYED_MKTEXPK True, False #else load_fonts #endif )) { XClearWindow(DISP, mane.win); xdvi_bell(); statusline_info(STATUS_MEDIUM, "%s: %s%s", globals.dvi_name, get_dvi_error(*errflag), resource.watch_file > 0.0 ? "; will try to reload ..." : " (click on window to reload)"); close_old_filep(); return False; } #if DELAYED_MKTEXPK /* second time */ kpse_set_program_enabled(kpse_any_glyph_format, True, kpse_src_compile); if (!internal_open_dvi(globals.dvi_name, errflag, True, True)) { XClearWindow(DISP, mane.win); xdvi_bell(); statusline_info(STATUS_MEDIUM, "%s: %s%s", globals.dvi_name, get_dvi_error(*errflag), resource.watch_file > 0.0 ? "; will try to reload ..." : " (click on window to reload)"); close_old_filep(); return False; } #endif else { /* success */ if (fstatbuf.st_ino != dvi_inode) { dvi_inode = fstatbuf.st_ino; form_dvi_property(); set_dvi_property(); } if (globals.page.w != old_page_w || globals.page.h != old_page_h) reconfig(); htex_reinit(); globals.cursor.flags &= ~CURSOR_CORRUPTED; return True; } }