[pango/line-breaker] layout: Go back to trimming start and end

[Matthias Clasen <matthiasc src gnome org>]

commit c4c96e4cf9fce193547f5de730b467810ec0c70b
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 25 22:25:57 2022 -0500

    layout: Go back to trimming start and end
    
    We want the first and the last line of the paragraph
    to have its leading trimmed, for the purposes of
    determining the paragraph extents.

 pango/pango-layout.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/pango/pango-layout.c b/pango/pango-layout.c
index 0214997e..97afea01 100644
--- a/pango/pango-layout.c
+++ b/pango/pango-layout.c
@@ -653,6 +653,7 @@ ensure_lines (PangoLayout *layout)
       PangoRectangle ext;
       int offset;
       PangoEllipsizeMode ellipsize = PANGO_ELLIPSIZE_NONE;
+      PangoLeadingTrim trim = PANGO_LEADING_TRIM_NONE;
 
       if ((line_no == 0) == (layout->indent > 0))
         {
@@ -670,7 +671,13 @@ ensure_lines (PangoLayout *layout)
 
 retry:
       line = pango_line_breaker_next_line (breaker, x, width, layout->wrap, ellipsize);
-      pango_line_get_extents (line, NULL, &ext);
+
+      if (line->starts_paragraph)
+        trim |= PANGO_LEADING_TRIM_START;
+      if (line->ends_paragraph)
+        trim |= PANGO_LEADING_TRIM_END;
+
+      pango_line_get_trimmed_extents (line, trim, &ext);
 
       if (layout->height >= 0 && y + 2 * ext.height >= layout->height &&
           ellipsize != layout->ellipsize)