[pango/pango2] layout: Fix indent

[Matthias Clasen <matthiasc src gnome org>]

commit 6a320f7acb2912a5f2af7cd7c113e0a8a7b2b88e
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 2 13:16:25 2022 -0400

    layout: Fix indent
    
    With multiple paragraphs, we need to indent
    not just the first one, but all of them.

 pango2/pango-layout.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/pango2/pango-layout.c b/pango2/pango-layout.c
index 19d3bdc47..4429c2c78 100644
--- a/pango2/pango-layout.c
+++ b/pango2/pango-layout.c
@@ -641,6 +641,7 @@ ensure_lines (Pango2Layout *layout)
   Pango2AttrList *attrs;
   int x, y, width;
   int line_no;
+  gboolean at_paragraph_start;
 
   check_context_changed (layout);
 
@@ -664,6 +665,7 @@ ensure_lines (Pango2Layout *layout)
 
   x = y = 0;
   line_no = 0;
+  at_paragraph_start = TRUE;
   while (pango2_line_breaker_has_line (breaker))
     {
       Pango2Line *line;
@@ -672,10 +674,13 @@ ensure_lines (Pango2Layout *layout)
       Pango2EllipsizeMode ellipsize = PANGO2_ELLIPSIZE_NONE;
       Pango2LeadingTrim trim = PANGO2_LEADING_TRIM_NONE;
 
-      if ((line_no == 0) == (layout->indent > 0))
+      if (at_paragraph_start == (layout->indent > 0))
         {
           x = abs (layout->indent);
-          width = layout->width - x;
+          if (layout->width == -1)
+            width = -1;
+          else
+            width = layout->width - x;
         }
       else
         {
@@ -689,6 +694,8 @@ ensure_lines (Pango2Layout *layout)
 retry:
       line = pango2_line_breaker_next_line (breaker, x, width, layout->wrap, ellipsize);
 
+      at_paragraph_start = line->ends_paragraph;
+
       if (line->starts_paragraph)
         trim |= PANGO2_LEADING_TRIM_START;
       if (line->ends_paragraph)