summaryrefslogtreecommitdiff
path: root/Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c')
-rw-r--r--Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c b/Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c
new file mode 100644
index 00000000000..298dbfc5858
--- /dev/null
+++ b/Build/source/utils/dialog/dialog-1.1-20080819/tailbox.c
@@ -0,0 +1,364 @@
+/*
+ * $Id: tailbox.c,v 1.52 2007/05/14 23:07:11 tom Exp $
+ *
+ * tailbox.c -- implements the tail box
+ *
+ * Copyright 2000-2006,2007 Thomas E. Dickey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License, version 2.1
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to
+ * Free Software Foundation, Inc.
+ * 51 Franklin St., Fifth Floor
+ * Boston, MA 02110, USA.
+ *
+ * An earlier version of this program lists as authors
+ * Pasquale De Marco (demarco_p@abramo.it)
+ */
+
+#include <dialog.h>
+#include <dlg_keys.h>
+
+typedef struct {
+ DIALOG_CALLBACK obj;
+ WINDOW *text;
+ const char **buttons;
+ int hscroll;
+ int old_hscroll;
+ char line[MAX_LEN + 1];
+} MY_OBJ;
+
+/*
+ * Return current line of text.
+ */
+static char *
+get_line(MY_OBJ * obj)
+{
+ FILE *fp = obj->obj.input;
+ int col = -(obj->hscroll);
+ int j, tmpint, ch;
+
+ do {
+ if (((ch = getc(fp)) == EOF) && !feof(fp))
+ dlg_exiterr("Error moving file pointer in get_line().");
+ else if (!feof(fp) && (ch != '\n')) {
+ if ((ch == TAB) && (dialog_vars.tab_correct)) {
+ tmpint = dialog_state.tab_len
+ - ((col + obj->hscroll) % dialog_state.tab_len);
+ for (j = 0; j < tmpint; j++) {
+ if (col >= 0 && col < MAX_LEN)
+ obj->line[col] = ' ';
+ ++col;
+ }
+ } else {
+ if (col >= 0)
+ obj->line[col] = ch;
+ ++col;
+ }
+ if (col >= MAX_LEN)
+ break;
+ }
+ } while (!feof(fp) && (ch != '\n'));
+
+ if (col < 0)
+ col = 0;
+ obj->line[col] = '\0';
+
+ return obj->line;
+}
+
+/*
+ * Print a new line of text.
+ */
+static void
+print_line(MY_OBJ * obj, WINDOW *win, int row, int width)
+{
+ int i, y, x;
+ char *line = get_line(obj);
+
+ (void) wmove(win, row, 0); /* move cursor to correct line */
+ (void) waddch(win, ' ');
+#ifdef NCURSES_VERSION
+ (void) waddnstr(win, line, MIN((int) strlen(line), width - 2));
+#else
+ line[MIN((int) strlen(line), width - 2)] = '\0';
+ waddstr(win, line);
+#endif
+
+ getyx(win, y, x);
+ /* Clear 'residue' of previous line */
+ for (i = 0; i < width - x; i++)
+ (void) waddch(win, ' ');
+}
+
+/*
+ * Go back 'target' lines in text file. BUFSIZ has to be in 'size_t' range.
+ */
+static void
+last_lines(MY_OBJ * obj, int target)
+{
+ FILE *fp = obj->obj.input;
+ int inx;
+ int count = 0;
+ char buf[BUFSIZ + 1];
+ size_t size_to_read;
+ size_t offset = 0;
+ long fpos = 0;
+
+ if (fseek(fp, 0, SEEK_END) == -1
+ || (fpos = ftell(fp)) < 0)
+ dlg_exiterr("Error moving file pointer in last_lines().");
+
+ if (fpos != 0) {
+ ++target;
+ for (;;) {
+ if (fpos >= BUFSIZ) {
+ size_to_read = (size_t) BUFSIZ;
+ } else {
+ size_to_read = ((size_t) fpos);
+ }
+ fpos -= size_to_read;
+ if (fseek(fp, fpos, SEEK_SET) == -1)
+ dlg_exiterr("Error moving file pointer in last_lines().");
+ (void) fread(buf, size_to_read, 1, fp);
+ if (ferror(fp))
+ dlg_exiterr("Error reading file in last_lines().");
+
+ offset += size_to_read;
+ for (inx = size_to_read - 1; inx >= 0; --inx) {
+ if (buf[inx] == '\n') {
+ if (++count > target)
+ break;
+ offset = inx + 1;
+ }
+ }
+
+ if (count > target) {
+ break;
+ } else if (fpos == 0) {
+ offset = 0;
+ break;
+ }
+ }
+
+ if (fseek(fp, fpos + offset, SEEK_SET) == -1)
+ dlg_exiterr("Error moving file pointer in last_lines().");
+ }
+}
+
+/*
+ * Print a new page of text.
+ */
+static void
+print_page(MY_OBJ * obj, int height, int width)
+{
+ int i;
+
+ for (i = 0; i < height; i++) {
+ print_line(obj, obj->text, i, width);
+ }
+ (void) wnoutrefresh(obj->text);
+}
+
+static void
+print_last_page(MY_OBJ * obj)
+{
+ int high = getmaxy(obj->obj.win) - (2 * MARGIN + (obj->obj.bg_task ? 1 : 3));
+ int wide = getmaxx(obj->text);
+
+ last_lines(obj, high);
+ print_page(obj, high, wide);
+}
+
+static void
+repaint_text(MY_OBJ * obj)
+{
+ int cur_y, cur_x;
+
+ getyx(obj->obj.win, cur_y, cur_x);
+ obj->old_hscroll = obj->hscroll;
+ print_last_page(obj);
+ (void) wmove(obj->obj.win, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(obj->obj.win);
+}
+
+static bool
+handle_my_getc(DIALOG_CALLBACK * cb, int ch, int fkey, int *result)
+{
+ MY_OBJ *obj = (MY_OBJ *) cb;
+ bool done = FALSE;
+
+ if (!fkey && dlg_char_to_button(ch, obj->buttons) == 0) {
+ ch = DLGK_ENTER;
+ fkey = TRUE;
+ }
+
+ if (fkey) {
+ switch (ch) {
+ case DLGK_ENTER:
+ *result = DLG_EXIT_OK;
+ done = TRUE;
+ break;
+ case DLGK_BEGIN: /* Beginning of line */
+ obj->hscroll = 0;
+ break;
+ case DLGK_GRID_LEFT: /* Scroll left */
+ if (obj->hscroll > 0) {
+ obj->hscroll -= 1;
+ }
+ break;
+ case DLGK_GRID_RIGHT: /* Scroll right */
+ if (obj->hscroll < MAX_LEN)
+ obj->hscroll += 1;
+ break;
+ default:
+ beep();
+ break;
+ }
+ if ((obj->hscroll != obj->old_hscroll))
+ repaint_text(obj);
+ } else {
+ switch (ch) {
+ case ERR:
+ ch = getc(cb->input);
+ (void) ungetc(ch, cb->input);
+ if ((ch != EOF) || (obj->hscroll != obj->old_hscroll)) {
+ repaint_text(obj);
+ }
+ break;
+ case ESC:
+ done = TRUE;
+ *result = DLG_EXIT_ESC;
+ break;
+ default:
+ beep();
+ break;
+ }
+ }
+
+ return !done;
+}
+
+/*
+ * Display text from a file in a dialog box, like in a "tail -f".
+ */
+int
+dialog_tailbox(const char *title, const char *file, int height, int width, int bg_task)
+{
+ /* *INDENT-OFF* */
+ static DLG_KEYS_BINDING binding[] = {
+ ENTERKEY_BINDINGS,
+ DLG_KEYS_DATA( DLGK_BEGIN, '0' ),
+ DLG_KEYS_DATA( DLGK_BEGIN, KEY_BEG ),
+ DLG_KEYS_DATA( DLGK_GRID_LEFT, 'H' ),
+ DLG_KEYS_DATA( DLGK_GRID_LEFT, 'h' ),
+ DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ),
+ DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'L' ),
+ DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'l' ),
+ DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ),
+ END_KEYS_BINDING
+ };
+ /* *INDENT-ON* */
+
+#ifdef KEY_RESIZE
+ int old_height = height;
+ int old_width = width;
+#endif
+ int fkey;
+ int x, y, result, thigh;
+ WINDOW *dialog, *text;
+ const char **buttons = 0;
+ MY_OBJ *obj;
+ FILE *fd;
+
+ /* Open input file for reading */
+ if ((fd = fopen(file, "rb")) == NULL)
+ dlg_exiterr("Can't open input file in dialog_tailbox().");
+
+#ifdef KEY_RESIZE
+ retry:
+#endif
+ dlg_auto_sizefile(title, file, &height, &width, 2, 12);
+ dlg_print_size(height, width);
+ dlg_ctl_size(height, width);
+
+ x = dlg_box_x_ordinate(width);
+ y = dlg_box_y_ordinate(height);
+ thigh = height - ((2 * MARGIN) + (bg_task ? 0 : 2));
+
+ dialog = dlg_new_window(height, width, y, x);
+
+ dlg_mouse_setbase(x, y);
+
+ /* Create window for text region, used for scrolling text */
+ text = dlg_sub_window(dialog,
+ thigh,
+ width - (2 * MARGIN),
+ y + MARGIN,
+ x + MARGIN);
+
+ dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
+ dlg_draw_bottom_box(dialog);
+ dlg_draw_title(dialog, title);
+
+ if (!bg_task) {
+ buttons = dlg_exit_label();
+ dlg_draw_buttons(dialog, height - (2 * MARGIN), 0, buttons, FALSE,
+ FALSE, width);
+ }
+
+ (void) wmove(dialog, thigh, (MARGIN + 1));
+ (void) wnoutrefresh(dialog);
+
+ obj = dlg_calloc(MY_OBJ, 1);
+ assert_ptr(obj, "dialog_tailbox");
+
+ obj->obj.input = fd;
+ obj->obj.win = dialog;
+ obj->obj.handle_getc = handle_my_getc;
+ obj->obj.keep_bg = bg_task && dialog_vars.cant_kill;
+ obj->obj.bg_task = bg_task;
+ obj->text = text;
+ obj->buttons = buttons;
+ dlg_add_callback(&(obj->obj));
+
+ dlg_register_window(dialog, "tailbox", binding);
+ dlg_register_buttons(dialog, "tailbox", buttons);
+
+ /* Print last page of text */
+ dlg_attr_clear(text, thigh, getmaxx(text), dialog_attr);
+ repaint_text(obj);
+
+ if (bg_task) {
+ result = DLG_EXIT_OK;
+ } else {
+ int ch;
+ do {
+ ch = dlg_getc(dialog, &fkey);
+#ifdef KEY_RESIZE
+ if (fkey && ch == KEY_RESIZE) {
+ /* reset data */
+ height = old_height;
+ width = old_width;
+ /* repaint */
+ dlg_clear();
+ dlg_del_window(dialog);
+ refresh();
+ dlg_mouse_free_regions();
+ goto retry;
+ }
+#endif
+ }
+ while (handle_my_getc(&(obj->obj), ch, fkey, &result));
+ }
+ dlg_mouse_free_regions();
+ return result;
+}