static void
fixup_text_block(fz_context *ctx, fz_text_block *block)
{
fz_text_line *line;
fz_text_span *span;
int i;
/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=734 */
/* remove duplicate character sequences in (almost) the same spot */
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
{
if (span->style && span->style->size < 5) /* do_glyphs_overlap fails too often for small fonts */
continue;
for (i = 0; i < span->len; i++)
{
fz_text_span *span2 = span;
fz_text_line *line2 = line;
int j = i + 1;
for (; span2 <= line2->spans + line2->len; span2++, j = 0)
{
if (span2 == line2->spans + line2->len)
{
if (line2 + 1 == block->lines + block->len || line2 != line)
break;
span2 = (++line2)->spans;
}
for (; j < span2->len; j++)
{
int c = span->text[i].c;
if (c != 32 && c == span2->text[j].c && do_glyphs_overlap(span, i, span2, j, 1))
goto fixup_delete_duplicates;
}
}
continue;
fixup_delete_duplicates:
do
{
delete_character(span, i);
if (span != span2)
j++;
} while (do_glyphs_overlap(span, i, span2, j, 0));
if (i < span->len && span->text[i].c == 32)
delete_character(span, i);
else if (i == span->len && span == line->spans + line->len - 1)
{
int len = line->len;
merge_lines(ctx, block, line);
span = line->spans + len - 1;
}
}
}
}
}
/*!
\brief Merge lines/boundaries
At least two lines need to be given.
\param Map pointer to Map_info
\param List list of selected lines
\return number of merged lines
\return -1 on error
*/
int Vedit_merge_lines(struct Map_info *Map, struct ilist *List)
{
struct ilist *List_in_box;
struct line_pnts *Points1, *Points2, *Points;
struct line_cats *Cats1, *Cats2;
int line_i, i, j;
int line, line1, type1, line2;
int do_merge;
/* number of lines (original, selected, merged) */
int nlines, nlines_merged;
nlines_merged = 0;
if (List->n_values < 2) {
return 0;
}
Points1 = Vect_new_line_struct();
Cats1 = Vect_new_cats_struct();
Points2 = Vect_new_line_struct();
Cats2 = Vect_new_cats_struct();
Points = Vect_new_line_struct();
List_in_box = Vect_new_list();
nlines = Vect_get_num_lines(Map);
/* merge lines */
for (line_i = 0; line_i < List->n_values; line_i++) {
line1 = List->value[line_i];
if (!Vect_line_alive(Map, line1))
continue;
type1 = Vect_read_line(Map, Points1, Cats1, line1);
if (!(type1 & GV_LINES))
continue;
Vect_reset_line(Points);
for (i = 0; i < Points1->n_points; i += Points1->n_points - 1) {
Vect_reset_list(List_in_box);
/* define searching region */
Vect_reset_line(Points2);
/*
Vect_append_point (Points2, Points1 -> x[i] - thresh,
Points1 -> y[i] + thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] + thresh,
Points1 -> y[i] + thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] + thresh,
Points1 -> y[i] - thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] - thresh,
Points1 -> y[i] - thresh, Points1 -> z[i]);
*/
Vect_append_point(Points2, Points1->x[i],
Points1->y[i], Points1->z[i]);
/*
* merge lines only if two lines found in the region
* i.e. the current line and an adjacent line
*/
if (1 < Vect_select_lines_by_polygon(Map, Points2, 0, NULL,
GV_LINES, List_in_box)) {
do_merge = 1;
line2 = -1;
for (j = 0; do_merge && j < List->n_values; j++) {
if (List->value[j] == line1 ||
!Vect_line_alive(Map, List->value[j]))
continue;
if (Vect_val_in_list(List_in_box, List->value[j])) {
if (line2 > 0) {
/* three lines found
* selected lines will be not merged
*/
do_merge = 0;
}
else {
line2 = List->value[j];
}
}
}
if (!do_merge || line2 < 0)
continue;
Vect_read_line(Map, Points2, Cats2, line2);
merge_lines(Points1, Cats1, Points2, Cats2, -1.0, &Points); /* do not use threshold value */
G_debug(3, "Vedit_merge_lines(): lines=%d,%d", line1, line2);
if (Points->n_points > 0) {
if (Vect_delete_line(Map, line2) == -1) {
return -1;
}
if (line2 <= nlines)
nlines_merged++;
}
}
} /* for each node */
if (Points->n_points > 0) {
line = Vect_rewrite_line(Map, line1, type1, Points, Cats1);
if (line < 0) {
return -1;
}
if (line1 <= nlines)
nlines_merged++;
/* update number of lines */
Vect_list_append(List, line);
}
} /* for each line */
/* destroy stuctures */
Vect_destroy_line_struct(Points1);
Vect_destroy_line_struct(Points2);
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats1);
Vect_destroy_cats_struct(Cats2);
return nlines_merged;
}