[gtk+] css: Redo GtkCssAffects

[Benjamin Otte <otte src gnome org>]

commit aa917ce3b77ab3fbf4f9417ddb8801bdf1a3bffc
Author: Benjamin Otte <otte redhat com>
Date:   Sun Jan 1 19:50:25 2017 +0100

    css: Redo GtkCssAffects
    
    We now have GTK_CSS_AFFECTS_CONTENT for properties that have an effect
    on content rendering.
    
    Using GTK_CSS_AFFECTS_ICON is wrong for icon-transform and icon-filter
    as they don't change the icon, just how the icon is rendered, so we use
    GTK_CSS_AFFECTS_CONTENT for those.
    
    We also introduce GTK_CSS_AFFECTS_POSTEFFECT for opacity and filter -
    properties that affect the whole drawing of the widget by applying an
    effect after everything is said and done.

 gtk/gtkcssstylepropertyimpl.c |   10 +++++-----
 gtk/gtkcsstypesprivate.h      |   14 +++++++++-----
 2 files changed, 14 insertions(+), 10 deletions(-)
---
diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index 20d2988..8fbf512 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -897,7 +897,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_COLOR,
                                           GDK_TYPE_RGBA,
                                           GTK_STYLE_PROPERTY_INHERIT | GTK_STYLE_PROPERTY_ANIMATED,
-                                          GTK_CSS_AFFECTS_FOREGROUND | GTK_CSS_AFFECTS_TEXT | 
GTK_CSS_AFFECTS_SYMBOLIC_ICON,
+                                          GTK_CSS_AFFECTS_CONTENT | GTK_CSS_AFFECTS_TEXT | 
GTK_CSS_AFFECTS_SYMBOLIC_ICON,
                                           color_parse,
                                           color_query,
                                           _gtk_css_color_value_new_rgba (1, 1, 1, 1));
@@ -1446,7 +1446,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_ICON_TRANSFORM,
                                           G_TYPE_NONE,
                                           GTK_STYLE_PROPERTY_ANIMATED,
-                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON | 
GTK_CSS_AFFECTS_CLIP,
+                                          GTK_CSS_AFFECTS_CONTENT | GTK_CSS_AFFECTS_CLIP,
                                           transform_value_parse,
                                           NULL,
                                           _gtk_css_transform_value_new_none ());
@@ -1454,7 +1454,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_ICON_FILTER,
                                           G_TYPE_NONE,
                                           GTK_STYLE_PROPERTY_ANIMATED,
-                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON | 
GTK_CSS_AFFECTS_CLIP,
+                                          GTK_CSS_AFFECTS_CONTENT,
                                           filter_value_parse,
                                           NULL,
                                           gtk_css_filter_value_new_none ());
@@ -1590,7 +1590,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_OPACITY,
                                           G_TYPE_DOUBLE,
                                           GTK_STYLE_PROPERTY_ANIMATED,
-                                          0,
+                                          GTK_CSS_AFFECTS_POSTEFFECT,
                                           opacity_parse,
                                           opacity_query,
                                           _gtk_css_number_value_new (1, GTK_CSS_NUMBER));
@@ -1598,7 +1598,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_FILTER,
                                           G_TYPE_NONE,
                                           GTK_STYLE_PROPERTY_ANIMATED,
-                                          GTK_CSS_AFFECTS_REDRAW,
+                                          GTK_CSS_AFFECTS_POSTEFFECT,
                                           filter_value_parse,
                                           NULL,
                                           gtk_css_filter_value_new_none ());
diff --git a/gtk/gtkcsstypesprivate.h b/gtk/gtkcsstypesprivate.h
index 9e08087..27d9af8 100644
--- a/gtk/gtkcsstypesprivate.h
+++ b/gtk/gtkcsstypesprivate.h
@@ -96,7 +96,7 @@ typedef guint64 GtkCssChange;
 
 /*
  * GtkCssAffects:
- * @GTK_CSS_AFFECTS_FOREGROUND: The foreground rendering is affected.
+ * @GTK_CSS_AFFECTS_CONTENT: The content rendering is affected.
  *   This does not include things that affect the font. For those,
  *   see @GTK_CSS_AFFECTS_FONT.
  * @GTK_CSS_AFFECTS_BACKGROUND: The background rendering is affected.
@@ -116,6 +116,8 @@ typedef guint64 GtkCssChange;
  * @GTK_CSS_AFFECTS_SIZE: Changes in this property may have an effect
  *   on the allocated size of the element. Changes in these properties
  *   should cause a recomputation of the element's allocated size.
+ * @GTK_CSS_AFFECTS_POSTEFFECT: An effect is applied after drawing that changes
+ *   the drawing.
  *
  * The generic effects that a CSS property can have. If a value is
  * set, then the property will have an influence on that feature.
@@ -123,7 +125,7 @@ typedef guint64 GtkCssChange;
  * Note that multiple values can be set.
  */
 typedef enum {
-  GTK_CSS_AFFECTS_FOREGROUND = (1 << 0),
+  GTK_CSS_AFFECTS_CONTENT = (1 << 0),
   GTK_CSS_AFFECTS_BACKGROUND = (1 << 1),
   GTK_CSS_AFFECTS_BORDER = (1 << 2),
   GTK_CSS_AFFECTS_FONT = (1 << 3),
@@ -133,15 +135,17 @@ typedef enum {
   GTK_CSS_AFFECTS_SYMBOLIC_ICON = (1 << 7),
   GTK_CSS_AFFECTS_OUTLINE = (1 << 8),
   GTK_CSS_AFFECTS_CLIP = (1 << 9),
-  GTK_CSS_AFFECTS_SIZE = (1 << 10)
+  GTK_CSS_AFFECTS_SIZE = (1 << 10),
+  GTK_CSS_AFFECTS_POSTEFFECT = (1 << 11)
 } GtkCssAffects;
 
-#define GTK_CSS_AFFECTS_REDRAW (GTK_CSS_AFFECTS_FOREGROUND |    \
+#define GTK_CSS_AFFECTS_REDRAW (GTK_CSS_AFFECTS_CONTENT |       \
                                 GTK_CSS_AFFECTS_BACKGROUND |    \
                                 GTK_CSS_AFFECTS_BORDER |        \
                                 GTK_CSS_AFFECTS_ICON |          \
                                 GTK_CSS_AFFECTS_SYMBOLIC_ICON | \
-                                GTK_CSS_AFFECTS_OUTLINE)
+                                GTK_CSS_AFFECTS_OUTLINE |       \
+                                GTK_CSS_AFFECTS_POSTEFFECT)
 
 enum { /*< skip >*/
   GTK_CSS_PROPERTY_COLOR,