[gtk+] cssimage: Implement some equal functions

[Benjamin Otte <otte src gnome org>]

commit 0bfbf39306203d11d04c3aac93dea1155a52ba70
Author: Benjamin Otte <otte redhat com>
Date:   Thu Nov 1 00:22:39 2012 +0100

    cssimage: Implement some equal functions

 gtk/gtkcssimagecrossfade.c |   13 +++++++++++++
 gtk/gtkcssimagelinear.c    |   29 +++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcssimagecrossfade.c b/gtk/gtkcssimagecrossfade.c
index 2aa9f29..1b02af9 100644
--- a/gtk/gtkcssimagecrossfade.c
+++ b/gtk/gtkcssimagecrossfade.c
@@ -86,6 +86,18 @@ gtk_css_image_cross_fade_get_height (GtkCssImage *image)
   return start_height + (end_height - start_height) * cross_fade->progress;
 }
 
+static gboolean
+gtk_css_image_cross_fade_equal (GtkCssImage *image1,
+                                GtkCssImage *image2)
+{
+  GtkCssImageCrossFade *cross_fade1 = GTK_CSS_IMAGE_CROSS_FADE (image1);
+  GtkCssImageCrossFade *cross_fade2 = GTK_CSS_IMAGE_CROSS_FADE (image2);
+
+  return cross_fade1->progress == cross_fade2->progress &&
+         _gtk_css_image_equal (cross_fade1->start, cross_fade2->start) &&
+         _gtk_css_image_equal (cross_fade1->end, cross_fade2->end);
+}
+
 static void
 gtk_css_image_cross_fade_draw (GtkCssImage        *image,
                                cairo_t            *cr,
@@ -234,6 +246,7 @@ _gtk_css_image_cross_fade_class_init (GtkCssImageCrossFadeClass *klass)
 
   image_class->get_width = gtk_css_image_cross_fade_get_width;
   image_class->get_height = gtk_css_image_cross_fade_get_height;
+  image_class->equal = gtk_css_image_cross_fade_equal;
   image_class->draw = gtk_css_image_cross_fade_draw;
   image_class->parse = gtk_css_image_cross_fade_parse;
   image_class->print = gtk_css_image_cross_fade_print;
diff --git a/gtk/gtkcssimagelinear.c b/gtk/gtkcssimagelinear.c
index b09131d..9f94e49 100644
--- a/gtk/gtkcssimagelinear.c
+++ b/gtk/gtkcssimagelinear.c
@@ -533,6 +533,34 @@ fail:
   return GTK_CSS_IMAGE_CLASS (_gtk_css_image_linear_parent_class)->transition (start_image, end_image, property_id, progress);
 }
 
+static gboolean
+gtk_css_image_linear_equal (GtkCssImage *image1,
+                            GtkCssImage *image2)
+{
+  GtkCssImageLinear *linear1 = GTK_CSS_IMAGE_LINEAR (image1);
+  GtkCssImageLinear *linear2 = GTK_CSS_IMAGE_LINEAR (image2);
+  guint i;
+
+  if (linear1->repeating != linear2->repeating ||
+      !_gtk_css_value_equal (linear1->angle, linear2->angle) ||
+      linear1->stops->len != linear2->stops->len)
+    return FALSE;
+
+  for (i = 0; i < linear1->stops->len; i++)
+    {
+      GtkCssImageLinearColorStop *stop1, *stop2;
+
+      stop1 = &g_array_index (linear1->stops, GtkCssImageLinearColorStop, i);
+      stop2 = &g_array_index (linear2->stops, GtkCssImageLinearColorStop, i);
+
+      if (!_gtk_css_value_equal0 (stop1->offset, stop2->offset) ||
+          !_gtk_css_value_equal (stop1->color, stop2->color))
+        return FALSE;
+    }
+
+  return TRUE;
+}
+
 static void
 gtk_css_image_linear_dispose (GObject *object)
 {
@@ -563,6 +591,7 @@ _gtk_css_image_linear_class_init (GtkCssImageLinearClass *klass)
   image_class->parse = gtk_css_image_linear_parse;
   image_class->print = gtk_css_image_linear_print;
   image_class->compute = gtk_css_image_linear_compute;
+  image_class->equal = gtk_css_image_linear_equal;
   image_class->transition = gtk_css_image_linear_transition;
 
   object_class->dispose = gtk_css_image_linear_dispose;