diff options
Diffstat (limited to 'pango')
| -rw-r--r-- | pango/pango-layout.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/pango/pango-layout.c b/pango/pango-layout.c index 7731532c..fad92b3b 100644 --- a/pango/pango-layout.c +++ b/pango/pango-layout.c @@ -3525,6 +3525,29 @@ shape_tab (PangoLayoutLine *line, } } +#define DISABLE_BREAKPOINT_FLAG (1 << 16) + +static inline void +disable_breakpoint (PangoLayout *layout, + int offset) +{ + layout->log_attrs[offset].reserved |= DISABLE_BREAKPOINT_FLAG; +} + +static inline gboolean +breakpoint_is_disabled (PangoLayout *layout, + int offset) +{ + return (layout->log_attrs[offset].reserved & DISABLE_BREAKPOINT_FLAG) != 0; +} + +static void +clear_breakpoint_flags (PangoLayout *layout) +{ + for (int i = 0; i < layout->n_chars + 1; i++) + layout->log_attrs[i].reserved = 0; +} + static inline gboolean can_break_at (PangoLayout *layout, gint offset, @@ -3542,6 +3565,8 @@ can_break_at (PangoLayout *layout, if (offset == layout->n_chars) return TRUE; + else if (breakpoint_is_disabled (layout, offset)) + return FALSE; else if (wrap == PANGO_WRAP_WORD) return layout->log_attrs[offset].is_line_break; else if (wrap == PANGO_WRAP_CHAR) @@ -3990,7 +4015,28 @@ process_item (PangoLayout *layout, /* Add the width back, to the line, reshape, subtract the new width */ state->remaining_width += break_width; insert_run (line, state, new_item, FALSE); + break_width = pango_glyph_string_get_width (((PangoGlyphItem *)(line->runs->data))->glyphs); + if (break_width > state->remaining_width && + !breakpoint_is_disabled (layout, break_num_chars) && + break_num_chars > 1) + { + /* Unsplit the item, disable the breakpoint, try again */ + + uninsert_run (line); + pango_item_free (new_item); + pango_item_unsplit (item, length, break_num_chars); + + disable_breakpoint (layout, break_num_chars); + + num_chars = item->num_chars; + width = orig_width; + break_num_chars = num_chars; + break_width = width; + + goto retry_break; + } + state->remaining_width -= break_width; state->log_widths_offset += break_num_chars; @@ -4598,6 +4644,8 @@ pango_layout_check_lines (PangoLayout *layout) } while (!done); + clear_breakpoint_flags (layout); + g_free (state.log_widths); g_list_free_full (state.baseline_shifts, g_free); |