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Insert a space between separated non-space characters #79

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Insert a space between separated non-space characters #79

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29 changes: 24 additions & 5 deletions source/fitz/util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -626,18 +626,28 @@ do_flatten(fz_context *ctx, fz_buffer *buf, fz_stext_block *block, fz_text_flatt
{
fz_stext_line *line;
fz_stext_char *ch;
fz_stext_char* prev_ch; // 2025.10.10
int block_num = 0; // 2025.10.10

for (; block != NULL; block = block->next)
for (; block != NULL; block = block->next, block_num++) // 2025.10.10
{
if (block->type == FZ_STEXT_BLOCK_TEXT)
{
for (line = block->u.t.first_line; line; line = line->next)
int line_num = 0; // 2025.10.10
for (line = block->u.t.first_line; line; line = line->next, line_num++) // 2025.10.10
{
int break_line = 1;
for (ch = line->first_char; ch; ch = ch->next)
int ch_num = 0; // 2025.10.10
int space_num = 0; // 2025.10.10, number of spaces in the line
prev_ch = NULL; // 2025.10.10
for (ch = line->first_char; ch; prev_ch = ch, ch = ch->next, ch_num++) // 2025.10.10
{
if (fz_is_unicode_whitespace(ch->c)) // 2025.10.10
{
space_num++;
}
/* Last character of a line where we aren't keeping hyphens; check for dehyphenation. */
if (ch == line->last_char && (flatten & FZ_TEXT_FLATTEN_KEEP_HYPHENS) == 0)
if (ch == line->last_char && (flatten & FZ_TEXT_FLATTEN_KEEP_HYPHENS) == 0)
{
/* Soft hyphens are always removed. */
if (ch->c == 0xad)
Expand All @@ -662,6 +672,15 @@ do_flatten(fz_context *ctx, fz_buffer *buf, fz_stext_block *block, fz_text_flatt
fz_append_rune(ctx, buf, ' ');
*ws = 0;
}
// 2025.10.10, check a gap between prev_ch and ch
if (prev_ch && prev_ch->c != 0x20 && ch->c != 0x20)
{
float gap = ch->quad.ul.x - prev_ch->quad.ur.x;
if (gap > 0.5f) // 2025.10.10: if gap > 0.5 char width, insert space
{
fz_append_rune(ctx, buf, ' ');
}
}
fz_append_rune(ctx, buf, ch->c);
}
if (break_line == 0)
Expand All @@ -675,7 +694,7 @@ do_flatten(fz_context *ctx, fz_buffer *buf, fz_stext_block *block, fz_text_flatt
}
else if (flatten & FZ_TEXT_FLATTEN_KEEP_WHITESPACE)
fz_append_byte(ctx, buf, ' ');
else
else if ((ch_num - space_num) > 1) // 2025.10.10: avoid adding space for 1-char line.
*ws = 1;
}
if (flatten & FZ_TEXT_FLATTEN_KEEP_PARAGRAPHS)
Expand Down