pango-compat.c - ledit - Text editor (WIP)
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       ---
       pango-compat.c (1807B)
       ---
            1 #include <pango/pangoxft.h>
            2 
            3 /* FIXME: Is this illegal due to different licenses? */
            4 /* FIXME: Check earliest version of other used functions to get minimum pango version
            5    for ledit as a whole */
            6 /* FIXME: This is just copied from the newer version of pango. It *seems* like
            7    the structs used are public (they're in the documentation), but it does seem
            8    a bit dirty to do this here */
            9 /* This version check is disabled currently because an older version of pango had a 
           10    bug where pango_layout_get_direction didn't work with lines of length 0.
           11    I should actually check when that was changed so I can do a version check for that. */
           12 //#if !PANGO_VERSION_CHECK(1, 46, 0)
           13 #if 1
           14 static PangoLayoutRun *
           15 pango_layout_line_get_run(PangoLayoutLine *line, int index) {
           16         GSList *run_list;
           17 
           18         run_list = line->runs;
           19         while (run_list) {
           20                 PangoLayoutRun *run = run_list->data;
           21 
           22                 if (run->item->offset <= index && run->item->offset + run->item->length > index)
           23                         return run;
           24 
           25                 run_list = run_list->next;
           26         }
           27 
           28         return NULL;
           29 }
           30 
           31 static int
           32 pango_layout_line_get_char_level(PangoLayoutLine *line, int index) {
           33         PangoLayoutRun *run;
           34 
           35         run = pango_layout_line_get_run(line, index);
           36 
           37         if (run)
           38                 return run->item->analysis.level;
           39 
           40         return 0;
           41 }
           42 
           43 static PangoDirection
           44 pango_layout_line_get_char_direction(PangoLayoutLine *layout_line, int index) {
           45         return pango_layout_line_get_char_level(layout_line, index) % 2
           46                 ? PANGO_DIRECTION_RTL
           47                 : PANGO_DIRECTION_LTR;
           48 }
           49 
           50 PangoDirection
           51 ledit_pango_layout_get_direction(PangoLayout *layout, int index) {
           52         int lineno, x;
           53         PangoLayoutLine *line;
           54         pango_layout_index_to_line_x(layout, index, 0, &lineno, &x);
           55         line = pango_layout_get_line_readonly(layout, lineno);
           56 
           57         if (line)
           58                 return pango_layout_line_get_char_direction(line, index);
           59 
           60         return PANGO_DIRECTION_LTR;
           61 }
           62 #endif