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[pango/redo-attrs: 20/25] More work on line styles


commit 086586622c11ebf3d3fd54d26a6779248e7cbc40
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 7 02:36:19 2022 -0500

    More work on line styles

 pango/pango-attr-list.c  |  4 +--
 pango/pango-attributes.c |  6 ++---
 pango/pango-attributes.h | 24 +++++------------
 pango/pango-layout.c     | 45 ++++++++++++++++++--------------
 pango/pango-markup.c     |  6 ++---
 pango/pango-renderer.c   | 68 +++++++++++++++++++++++++++++++-----------------
 pango/pango-renderer.h   |  2 ++
 pango/serializer.c       | 13 ++-------
 tests/testattributes.c   |  4 +--
 9 files changed, 89 insertions(+), 83 deletions(-)
---
diff --git a/pango/pango-attr-list.c b/pango/pango-attr-list.c
index 505963f2..ca82fd60 100644
--- a/pango/pango-attr-list.c
+++ b/pango/pango-attr-list.c
@@ -767,7 +767,7 @@ get_attr_value_type (PangoAttrType type)
     case PANGO_ATTR_GRAVITY_HINT: return PANGO_TYPE_GRAVITY_HINT;
     case PANGO_ATTR_UNDERLINE: return PANGO_TYPE_LINE_STYLE;
     case PANGO_ATTR_STRIKETHROUGH: return PANGO_TYPE_LINE_STYLE;
-    case PANGO_ATTR_OVERLINE: return PANGO_TYPE_OVERLINE;
+    case PANGO_ATTR_OVERLINE: return PANGO_TYPE_LINE_STYLE;
     case PANGO_ATTR_BASELINE_SHIFT: return PANGO_TYPE_BASELINE_SHIFT;
     case PANGO_ATTR_FONT_SCALE: return PANGO_TYPE_FONT_SCALE;
     case PANGO_ATTR_TEXT_TRANSFORM: return PANGO_TYPE_TEXT_TRANSFORM;
@@ -1217,7 +1217,7 @@ pango_attr_list_from_string (const char *text)
           break;
 
         case PANGO_ATTR_OVERLINE:
-          ENUM_ATTR(overline, PangoOverline, PANGO_OVERLINE_NONE, PANGO_OVERLINE_SINGLE);
+          ENUM_ATTR(overline, PangoLineStyle, PANGO_LINE_STYLE_NONE, PANGO_LINE_STYLE_DOTTED);
           break;
 
         case PANGO_ATTR_OVERLINE_COLOR:
diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c
index 1e305229..2dd7ac25 100644
--- a/pango/pango-attributes.c
+++ b/pango/pango-attributes.c
@@ -734,7 +734,7 @@ pango_attr_sentence_new (void)
 
 /**
  * pango_attr_overline_new:
- * @overline: the overline style
+ * @style: the line style
  *
  * Create a new overline-style attribute.
  *
@@ -745,9 +745,9 @@ pango_attr_sentence_new (void)
  * Since: 1.46
  */
 PangoAttribute *
-pango_attr_overline_new (PangoOverline overline)
+pango_attr_overline_new (PangoLineStyle style)
 {
-  return pango_attr_int_new (PANGO_ATTR_OVERLINE, (int)overline);
+  return pango_attr_int_new (PANGO_ATTR_OVERLINE, (int)style);
 }
 
 /**
diff --git a/pango/pango-attributes.h b/pango/pango-attributes.h
index b9b82632..10689e43 100644
--- a/pango/pango-attributes.h
+++ b/pango/pango-attributes.h
@@ -148,7 +148,9 @@ PangoAttribute *        pango_attr_font_desc_new                (const PangoFont
  * @PANGO_LINE_STYLE_NONE: no line should be drawn
  * @PANGO_LINE_STYLE_SINGLE: a single line should be drawn
  * @PANGO_LINE_STYLE_DOUBLE: a double line should be drawn
+ * @PANGO_LINE_STYLE_DASHED: an dashed line should be drawn
  * @PANGO_LINE_STYLE_DOTTED: an dotted line should be drawn
+ * @PANGO_LINE_STYLE_WAVY: an wavy line should be drawn
  *
  * The `PangoLineStyle` enumeration is used to specify how
  * lines should be drawn.
@@ -157,7 +159,9 @@ typedef enum {
   PANGO_LINE_STYLE_NONE,
   PANGO_LINE_STYLE_SINGLE,
   PANGO_LINE_STYLE_DOUBLE,
-  PANGO_LINE_STYLE_DOTTED
+  PANGO_LINE_STYLE_DASHED,
+  PANGO_LINE_STYLE_DOTTED,
+  PANGO_LINE_STYLE_WAVY
 } PangoLineStyle;
 
 PANGO_AVAILABLE_IN_ALL
@@ -248,24 +252,8 @@ PangoAttribute *        pango_attr_sentence_new                 (void);
 PANGO_AVAILABLE_IN_1_44
 PangoAttribute *        pango_attr_insert_hyphens_new           (gboolean                     
insert_hyphens);
 
-/**
- * PangoOverline:
- * @PANGO_OVERLINE_NONE: no overline should be drawn
- * @PANGO_OVERLINE_SINGLE: Draw a single line above the ink
- *   extents of the text being underlined.
- *
- * The `PangoOverline` enumeration is used to specify whether text
- * should be overlined, and if so, the type of line.
- *
- * Since: 1.46
- */
-typedef enum {
-  PANGO_OVERLINE_NONE,
-  PANGO_OVERLINE_SINGLE
-} PangoOverline;
-
 PANGO_AVAILABLE_IN_1_46
-PangoAttribute *        pango_attr_overline_new                 (PangoOverline               overline);
+PangoAttribute *        pango_attr_overline_new                 (PangoLineStyle              style);
 PANGO_AVAILABLE_IN_1_46
 PangoAttribute *        pango_attr_overline_color_new           (PangoColor                 *color);
 
diff --git a/pango/pango-layout.c b/pango/pango-layout.c
index cd9d2174..7d65b0ae 100644
--- a/pango/pango-layout.c
+++ b/pango/pango-layout.c
@@ -109,7 +109,7 @@ struct _ItemProperties
   PangoLineStyle uline_style;
   PangoUnderlinePosition uline_position;
   PangoLineStyle strikethrough_style;
-  guint oline_single   : 1;
+  PangoLineStyle oline_style;
   guint showing_space  : 1;
   gint            letter_spacing;
   double line_height;
@@ -5561,7 +5561,7 @@ pango_layout_run_get_extents_and_height (PangoLayoutRun *run,
   pango_layout_get_item_properties (run->item, &properties);
 
   has_underline = properties.uline_style != PANGO_LINE_STYLE_NONE;
-  has_overline = properties.oline_single;
+  has_overline = properties.oline_style != PANGO_LINE_STYLE_NONE;
   has_strikethrough = properties.strikethrough_style != PANGO_LINE_STYLE_NONE;
 
   if (!run_logical && (run->item->analysis.flags & PANGO_ANALYSIS_FLAG_CENTERED_BASELINE))
@@ -5613,13 +5613,23 @@ pango_layout_run_get_extents_and_height (PangoLayoutRun *run,
             }
         }
 
-      if (properties.oline_single)
+      if (properties.oline_style == PANGO_LINE_STYLE_SINGLE ||
+          properties.oline_style == PANGO_LINE_STYLE_DASHED ||
+          properties.oline_style == PANGO_LINE_STYLE_DOTTED)
         {
           run_ink->y -= underline_thickness;
           run_ink->height += underline_thickness;
         }
+      else if (properties.oline_style == PANGO_LINE_STYLE_DOUBLE ||
+               properties.oline_style == PANGO_LINE_STYLE_WAVY)
+        {
+          run_ink->y -= 3 * underline_thickness;
+          run_ink->height += 3 * underline_thickness;
+        }
 
-      if (properties.uline_style == PANGO_LINE_STYLE_SINGLE)
+      if (properties.uline_style == PANGO_LINE_STYLE_SINGLE ||
+          properties.uline_style == PANGO_LINE_STYLE_DASHED ||
+          properties.uline_style == PANGO_LINE_STYLE_DOTTED)
         {
           if (properties.uline_position == PANGO_UNDERLINE_POSITION_UNDER)
             run_ink->height += 2 * underline_thickness;
@@ -5627,12 +5637,15 @@ pango_layout_run_get_extents_and_height (PangoLayoutRun *run,
             run_ink->height = MAX (run_ink->height,
                                    underline_thickness - underline_position - run_ink->y);
         }
-      else if (properties.uline_style == PANGO_LINE_STYLE_DOUBLE)
-        run_ink->height = MAX (run_ink->height,
-                                 3 * underline_thickness - underline_position - run_ink->y);
-      else if (properties.uline_style == PANGO_LINE_STYLE_DOTTED)
-        run_ink->height = MAX (run_ink->height,
-                               3 * underline_thickness - underline_position - run_ink->y);
+      else if (properties.uline_style == PANGO_LINE_STYLE_DOUBLE ||
+               properties.uline_style == PANGO_LINE_STYLE_WAVY)
+        {
+          if (properties.uline_position == PANGO_UNDERLINE_POSITION_UNDER)
+            run_ink->height += 4 * underline_thickness;
+          else
+            run_ink->height = MAX (run_ink->height,
+                                   3 * underline_thickness - underline_position - run_ink->y);
+        }
     }
 
   if (height)
@@ -6731,7 +6744,7 @@ pango_layout_get_item_properties (PangoItem      *item,
   properties->uline_style = PANGO_LINE_STYLE_NONE;
   properties->uline_position = PANGO_UNDERLINE_POSITION_NORMAL;
   properties->strikethrough_style = PANGO_LINE_STYLE_NONE;
-  properties->oline_single = FALSE;
+  properties->oline_style = PANGO_LINE_STYLE_NONE;
   properties->showing_space = FALSE;
   properties->letter_spacing = 0;
   properties->line_height = 0.0;
@@ -6752,15 +6765,7 @@ pango_layout_get_item_properties (PangoItem      *item,
           break;
 
         case PANGO_ATTR_OVERLINE:
-          switch (attr->int_value)
-            {
-            case PANGO_OVERLINE_SINGLE:
-              properties->oline_single = TRUE;
-              break;
-            default:
-              g_assert_not_reached ();
-              break;
-            }
+          properties->oline_style = attr->int_value;
           break;
 
         case PANGO_ATTR_STRIKETHROUGH:
diff --git a/pango/pango-markup.c b/pango/pango-markup.c
index b2da8e49..f8fa495a 100644
--- a/pango/pango-markup.c
+++ b/pango/pango-markup.c
@@ -1578,12 +1578,12 @@ span_parse_func     (MarkupData            *md G_GNUC_UNUSED,
 
   if (G_UNLIKELY (overline))
     {
-      PangoOverline ol = PANGO_OVERLINE_NONE;
+      PangoLineStyle style = PANGO_LINE_STYLE_NONE;
 
-      if (!span_parse_enum ("overline", overline, PANGO_TYPE_OVERLINE, (int*)(void*)&ol, line_number, error))
+      if (!span_parse_enum ("overline", overline, PANGO_TYPE_LINE_STYLE, (int*)(void*)&style, line_number, 
error))
        goto error;
 
-      add_attribute (tag, pango_attr_overline_new (ol));
+      add_attribute (tag, pango_attr_overline_new (style));
     }
 
   if (G_UNLIKELY (overline_color))
diff --git a/pango/pango-renderer.c b/pango/pango-renderer.c
index 9fb10a42..6f6f2c73 100644
--- a/pango/pango-renderer.c
+++ b/pango/pango-renderer.c
@@ -49,7 +49,7 @@ struct _LineState
   PangoRectangle strikethrough_rect;
   int strikethrough_glyphs;
 
-  PangoOverline  overline;
+  PangoLineStyle overline;
   PangoRectangle overline_rect;
 
   int logical_rect_end;
@@ -63,7 +63,6 @@ struct _PangoRendererPrivate
 
   PangoLayoutLine *line;
   LineState *line_state;
-  PangoOverline overline;
 };
 
 static void pango_renderer_finalize                     (GObject          *gobject);
@@ -234,6 +233,8 @@ draw_underline (PangoRenderer *renderer,
                                      rect->height);
       G_GNUC_FALLTHROUGH;
     case PANGO_LINE_STYLE_SINGLE:
+    case PANGO_LINE_STYLE_DOTTED:
+    case PANGO_LINE_STYLE_DASHED:
       pango_renderer_draw_rectangle (renderer,
                                      PANGO_RENDER_PART_UNDERLINE,
                                      rect->x,
@@ -241,7 +242,7 @@ draw_underline (PangoRenderer *renderer,
                                      rect->width,
                                      rect->height);
       break;
-    case PANGO_LINE_STYLE_DOTTED:
+    case PANGO_LINE_STYLE_WAVY:
       pango_renderer_draw_error_underline (renderer,
                                            rect->x,
                                            rect->y,
@@ -258,15 +259,26 @@ draw_overline (PangoRenderer *renderer,
                LineState     *state)
 {
   PangoRectangle *rect = &state->overline_rect;
-  PangoOverline overline = state->overline;
+  PangoLineStyle overline = state->overline;
 
-  state->overline = PANGO_OVERLINE_NONE;
+  state->overline = PANGO_LINE_STYLE_NONE;
 
   switch (overline)
     {
-    case PANGO_OVERLINE_NONE:
+    case PANGO_LINE_STYLE_NONE:
       break;
-    case PANGO_OVERLINE_SINGLE:
+    case PANGO_LINE_STYLE_DOUBLE:
+      pango_renderer_draw_rectangle (renderer,
+                                     PANGO_RENDER_PART_OVERLINE,
+                                     rect->x,
+                                     rect->y - 2 * rect->height,
+                                     rect->width,
+                                     rect->height);
+      G_GNUC_FALLTHROUGH;
+    case PANGO_LINE_STYLE_SINGLE:
+    case PANGO_LINE_STYLE_DOTTED:
+    case PANGO_LINE_STYLE_DASHED:
+    case PANGO_LINE_STYLE_WAVY:
       pango_renderer_draw_rectangle (renderer,
                                      PANGO_RENDER_PART_OVERLINE,
                                      rect->x,
@@ -305,6 +317,8 @@ draw_strikethrough (PangoRenderer *renderer,
           G_GNUC_FALLTHROUGH;
         case PANGO_LINE_STYLE_SINGLE:
         case PANGO_LINE_STYLE_DOTTED:
+        case PANGO_LINE_STYLE_DASHED:
+        case PANGO_LINE_STYLE_WAVY:
           pango_renderer_draw_rectangle (renderer,
                                          PANGO_RENDER_PART_STRIKETHROUGH,
                                          rect->x,
@@ -347,13 +361,13 @@ handle_line_state_change (PangoRenderer  *renderer,
     }
 
   if (part == PANGO_RENDER_PART_OVERLINE &&
-      state->overline != PANGO_OVERLINE_NONE)
+      state->overline != PANGO_LINE_STYLE_NONE)
     {
       PangoRectangle *rect = &state->overline_rect;
 
       rect->width = state->logical_rect_end - rect->x;
       draw_overline (renderer, state);
-      state->overline = renderer->priv->overline;
+      state->overline = renderer->overline;
       rect->x = state->logical_rect_end;
       rect->width = 0;
     }
@@ -395,6 +409,8 @@ add_underline (PangoRenderer    *renderer,
       g_assert_not_reached ();
       break;
     case PANGO_LINE_STYLE_SINGLE:
+    case PANGO_LINE_STYLE_DASHED:
+    case PANGO_LINE_STYLE_DOTTED:
       if (renderer->underline_position == PANGO_UNDERLINE_POSITION_UNDER)
         {
           new_rect.y += ink_rect->y + ink_rect->height + underline_thickness;
@@ -402,7 +418,7 @@ add_underline (PangoRenderer    *renderer,
         }
       G_GNUC_FALLTHROUGH;
     case PANGO_LINE_STYLE_DOUBLE:
-    case PANGO_LINE_STYLE_DOTTED:
+    case PANGO_LINE_STYLE_WAVY:
       new_rect.y -= underline_position;
       if (state->underline == renderer->underline)
         {
@@ -452,14 +468,18 @@ add_overline (PangoRenderer    *renderer,
   new_rect.height = underline_thickness;
   new_rect.y = base_y;
 
-  switch (renderer->priv->overline)
+  switch (renderer->overline)
     {
-    case PANGO_OVERLINE_NONE:
+    case PANGO_LINE_STYLE_NONE:
       g_assert_not_reached ();
       break;
-    case PANGO_OVERLINE_SINGLE:
+    case PANGO_LINE_STYLE_SINGLE:
+    case PANGO_LINE_STYLE_DOUBLE:
+    case PANGO_LINE_STYLE_DASHED:
+    case PANGO_LINE_STYLE_DOTTED:
+    case PANGO_LINE_STYLE_WAVY:
       new_rect.y -= ascent;
-      if (state->overline == renderer->priv->overline)
+      if (state->overline == renderer->overline)
         {
           new_rect.y = MIN (current_rect->y, new_rect.y);
           new_rect.height = MAX (current_rect->height, new_rect.height);
@@ -471,7 +491,7 @@ add_overline (PangoRenderer    *renderer,
       break;
     }
 
-  if (renderer->priv->overline == state->overline &&
+  if (renderer->overline == state->overline &&
       new_rect.y == current_rect->y &&
       new_rect.height == current_rect->height)
     {
@@ -482,7 +502,7 @@ add_overline (PangoRenderer    *renderer,
       draw_overline (renderer, state);
 
       *current_rect = new_rect;
-      state->overline = renderer->priv->overline;
+      state->overline = renderer->overline;
     }
 }
 
@@ -574,7 +594,7 @@ pango_renderer_draw_layout_line (PangoRenderer   *renderer,
 
   state.underline = PANGO_LINE_STYLE_NONE;
   state.underline_position = PANGO_UNDERLINE_POSITION_NORMAL;
-  state.overline = PANGO_OVERLINE_NONE;
+  state.overline = PANGO_LINE_STYLE_NONE;
   state.strikethrough = PANGO_LINE_STYLE_NONE;
 
   text = G_LIKELY (line->layout) ? pango_layout_get_text (line->layout) : NULL;
@@ -593,7 +613,7 @@ pango_renderer_draw_layout_line (PangoRenderer   *renderer,
       pango_renderer_prepare_run (renderer, run);
 
       if (renderer->underline != PANGO_LINE_STYLE_NONE ||
-          renderer->priv->overline != PANGO_OVERLINE_NONE ||
+          renderer->overline != PANGO_LINE_STYLE_NONE ||
           renderer->strikethrough != PANGO_LINE_STYLE_NONE)
         {
           ink = &ink_rect;
@@ -646,7 +666,7 @@ pango_renderer_draw_layout_line (PangoRenderer   *renderer,
                                       x + x_off, y - y_off);
 
       if (renderer->underline != PANGO_LINE_STYLE_NONE ||
-          renderer->priv->overline != PANGO_OVERLINE_NONE ||
+          renderer->overline != PANGO_LINE_STYLE_NONE ||
           renderer->strikethrough != PANGO_LINE_STYLE_NONE)
         {
           metrics = pango_font_get_metrics (run->item->analysis.font,
@@ -657,7 +677,7 @@ pango_renderer_draw_layout_line (PangoRenderer   *renderer,
                            x + x_off, y - y_off,
                            ink, logical);
 
-          if (renderer->priv->overline != PANGO_OVERLINE_NONE)
+          if (renderer->overline != PANGO_LINE_STYLE_NONE)
             add_overline (renderer, &state,metrics,
                            x + x_off, y - y_off,
                            ink, logical);
@@ -674,8 +694,8 @@ pango_renderer_draw_layout_line (PangoRenderer   *renderer,
           state.underline != PANGO_LINE_STYLE_NONE)
         draw_underline (renderer, &state);
 
-      if (renderer->priv->overline == PANGO_OVERLINE_NONE &&
-          state.overline != PANGO_OVERLINE_NONE)
+      if (renderer->overline == PANGO_LINE_STYLE_NONE &&
+          state.overline != PANGO_LINE_STYLE_NONE)
         draw_overline (renderer, &state);
 
       if (renderer->strikethrough == PANGO_LINE_STYLE_NONE &&
@@ -1431,7 +1451,7 @@ pango_renderer_default_prepare_run (PangoRenderer  *renderer,
 
   renderer->underline = PANGO_LINE_STYLE_NONE;
   renderer->underline_position = PANGO_UNDERLINE_POSITION_NORMAL;
-  renderer->priv->overline = PANGO_OVERLINE_NONE;
+  renderer->overline = PANGO_LINE_STYLE_NONE;
   renderer->strikethrough = PANGO_LINE_STYLE_NONE;
 
   for (l = run->item->analysis.extra_attrs; l; l = l->next)
@@ -1449,7 +1469,7 @@ pango_renderer_default_prepare_run (PangoRenderer  *renderer,
           break;
 
         case PANGO_ATTR_OVERLINE:
-          renderer->priv->overline = attr->int_value;
+          renderer->overline = attr->int_value;
           break;
 
         case PANGO_ATTR_STRIKETHROUGH:
diff --git a/pango/pango-renderer.h b/pango/pango-renderer.h
index 6848f749..2151a243 100644
--- a/pango/pango-renderer.h
+++ b/pango/pango-renderer.h
@@ -82,6 +82,8 @@ struct _PangoRenderer
   PangoLineStyle underline;
   PangoUnderlinePosition underline_position;
   PangoLineStyle strikethrough;
+  PangoLineStyle overline;
+
   int active_count;
 
   /*< public >*/
diff --git a/pango/serializer.c b/pango/serializer.c
index 61650b22..4e88351d 100644
--- a/pango/serializer.c
+++ b/pango/serializer.c
@@ -86,12 +86,6 @@ static const char *underline_position_names[] = {
   NULL
 };
 
-static const char *overline_names[] = {
-  "none",
-  "single",
-  NULL
-};
-
 static const char *gravity_names[] = {
   "south",
   "east",
@@ -325,6 +319,7 @@ add_attribute (GtkJsonPrinter *printer,
 
         case PANGO_ATTR_UNDERLINE:
         case PANGO_ATTR_STRIKETHROUGH:
+        case PANGO_ATTR_OVERLINE:
           gtk_json_printer_add_string (printer, "value", line_style_names[attr->int_value]);
           break;
 
@@ -332,10 +327,6 @@ add_attribute (GtkJsonPrinter *printer,
           gtk_json_printer_add_string (printer, "value", underline_position_names[attr->int_value]);
           break;
 
-        case PANGO_ATTR_OVERLINE:
-          gtk_json_printer_add_string (printer, "value", overline_names[attr->int_value]);
-          break;
-
         case PANGO_ATTR_GRAVITY:
           gtk_json_printer_add_string (printer, "value", gravity_names[attr->int_value]);
           break;
@@ -1089,7 +1080,7 @@ attr_for_type (GtkJsonParser *parser,
       break;
 
     case PANGO_ATTR_OVERLINE:
-      attr = pango_attr_overline_new ((PangoOverline) parser_select_string (parser, overline_names));
+      attr = pango_attr_overline_new ((PangoLineStyle) parser_select_string (parser, line_style_names));
       break;
 
     case PANGO_ATTR_OVERLINE_COLOR:
diff --git a/tests/testattributes.c b/tests/testattributes.c
index c308d67c..71144821 100644
--- a/tests/testattributes.c
+++ b/tests/testattributes.c
@@ -53,7 +53,7 @@ test_attributes_basic (void)
   test_copy (pango_attr_underline_new (PANGO_LINE_STYLE_SINGLE));
   test_copy (pango_attr_underline_new (PANGO_LINE_STYLE_DOTTED));
   test_copy (pango_attr_underline_color_new (&(PangoColor){100, 200, 300}));
-  test_copy (pango_attr_overline_new (PANGO_OVERLINE_SINGLE));
+  test_copy (pango_attr_overline_new (PANGO_LINE_STYLE_SINGLE));
   test_copy (pango_attr_overline_color_new (&(PangoColor){100, 200, 300}));
   test_copy (pango_attr_strikethrough_new (TRUE));
   test_copy (pango_attr_strikethrough_color_new (&(PangoColor){100, 200, 300}));
@@ -233,7 +233,7 @@ test_binding_helpers (void)
   test_binding (pango_attr_underline_new (PANGO_LINE_STYLE_SINGLE));
   test_binding (pango_attr_underline_new (PANGO_LINE_STYLE_DOTTED));
   test_binding (pango_attr_underline_color_new (&(PangoColor){100, 200, 300}));
-  test_binding (pango_attr_overline_new (PANGO_OVERLINE_SINGLE));
+  test_binding (pango_attr_overline_new (PANGO_LINE_STYLE_SINGLE));
   test_binding (pango_attr_overline_color_new (&(PangoColor){100, 200, 300}));
   test_binding (pango_attr_strikethrough_new (TRUE));
   test_binding (pango_attr_strikethrough_color_new (&(PangoColor){100, 200, 300}));
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