static gboolean
layout_is_ellipsized(PangoLayout *layout)
{
/* pango_layout_is_ellipsized() is a new function in Pango-1.16; we
* emulate it here by trying to look for the ellipsis run
*/
PangoLogAttr *log_attrs;
int n_attrs;
PangoLayoutIter *iter;
gboolean result = FALSE;
/* Short circuit when we aren't ellipsizing at all */
if (pango_layout_get_ellipsize(layout) == PANGO_ELLIPSIZE_NONE)
return FALSE;
pango_layout_get_log_attrs(layout, &log_attrs, &n_attrs);
iter = pango_layout_get_iter(layout);
do {
PangoGlyphItem *run;
int n_glyphs;
int start_index;
int n_graphemes;
int i;
run = pango_layout_iter_get_run(iter);
if (!run)
continue;
n_glyphs = run->glyphs->num_glyphs;
start_index = pango_layout_iter_get_index(iter);
/* Check the number of clusters in the run ... if it is greater
* than 1, then it isn't an ellipsis
*/
if (run->glyphs->log_clusters[0] != run->glyphs->log_clusters[n_glyphs - 1])
continue;
/* Now check the number of graphemes in the run ... if it is less
* than 3, it's probably an isolated 'fi' ligature or something
* like that rather than an ellipsis.
*/
n_graphemes = 0;
for (i = 0; i < run->item->num_chars && i + start_index < n_attrs; i++)
if (log_attrs[i + start_index].is_cursor_position)
n_graphemes++;
if (n_graphemes < 3)
continue;
/* OK, at this point it is probably an ellipsis; it's possible that
* the text consists of just the letters 'ffi' and the font has a ligature
* for that or something, but it's not too likely.
*/
result = TRUE;
break;
} while (pango_layout_iter_next_run(iter));
pango_layout_iter_free(iter);
g_free(log_attrs);
return result;
}
static VALUE
rg_ellipsize(VALUE self)
{
return GENUM2RVAL(pango_layout_get_ellipsize(_SELF(self)), PANGO_TYPE_ELLIPSIZE_MODE);
}
static VALUE
rg_ellipsize(VALUE self)
{
return PANGOELLIPSIZEMODE2RVAL(pango_layout_get_ellipsize(_SELF(self)));
}
