[gtk+] css: Add GTK_CSS_AFFECTS_ICON_SIZE

[Timm Bäder <baedert src gnome org>]

commit 4e24cb858866abafc7208b33df9099d8b5e85d66
Author: Timm Bäder <mail baedert org>
Date:   Sat Oct 14 14:58:53 2017 +0200

    css: Add GTK_CSS_AFFECTS_ICON_SIZE
    
    And use it in GtkIconHelper. This way, we can avoid resizes when e.g.
    the fg color of a symbolic icon changes.

 gtk/gtkcssstylepropertyimpl.c |    4 ++--
 gtk/gtkcsstypesprivate.h      |    1 +
 gtk/gtkiconhelper.c           |   15 ++++++++++++++-
 3 files changed, 17 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index c68268e..8f714d8 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -1033,7 +1033,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_ICON_THEME,
                                           G_TYPE_NONE,
                                           GTK_STYLE_PROPERTY_INHERIT,
-                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON,
+                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON | 
GTK_CSS_AFFECTS_ICON_SIZE,
                                           icon_theme_value_parse,
                                           NULL,
                                           gtk_css_icon_theme_value_new (NULL));
@@ -1592,7 +1592,7 @@ _gtk_css_style_property_init_properties (void)
                                           GTK_CSS_PROPERTY_ICON_STYLE,
                                           G_TYPE_NONE,
                                           GTK_STYLE_PROPERTY_INHERIT,
-                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON,
+                                          GTK_CSS_AFFECTS_ICON | GTK_CSS_AFFECTS_SYMBOLIC_ICON | 
GTK_CSS_AFFECTS_ICON_SIZE,
                                           icon_style_parse,
                                           NULL,
                                           _gtk_css_icon_style_value_new (GTK_CSS_ICON_STYLE_REQUESTED));
diff --git a/gtk/gtkcsstypesprivate.h b/gtk/gtkcsstypesprivate.h
index 1e43172..a173f55 100644
--- a/gtk/gtkcsstypesprivate.h
+++ b/gtk/gtkcsstypesprivate.h
@@ -127,6 +127,7 @@ typedef enum {
   GTK_CSS_AFFECTS_CONTENT       = (1 << 0),
   GTK_CSS_AFFECTS_BACKGROUND    = (1 << 1),
   GTK_CSS_AFFECTS_BORDER        = (1 << 2),
+  GTK_CSS_AFFECTS_ICON_SIZE     = (1 << 3),
   GTK_CSS_AFFECTS_TEXT_ATTRS    = (1 << 4),
   GTK_CSS_AFFECTS_TEXT_SIZE     = (1 << 5),
   GTK_CSS_AFFECTS_TEXT_CLIP     = (1 << 6),
diff --git a/gtk/gtkiconhelper.c b/gtk/gtkiconhelper.c
index 5fe7689..484c022 100644
--- a/gtk/gtkiconhelper.c
+++ b/gtk/gtkiconhelper.c
@@ -60,7 +60,20 @@ gtk_icon_helper_invalidate_for_change (GtkIconHelper     *self,
        (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_ICON) &&
         !self->rendered_surface_is_symbolic)))
     {
-      gtk_icon_helper_invalidate (self);
+      /* Avoid the queue_resize in gtk_icon_helper_invalidate */
+      g_clear_object (&self->texture);
+
+      if (self->rendered_surface != NULL)
+        {
+          cairo_surface_destroy (self->rendered_surface);
+          self->rendered_surface = NULL;
+          self->rendered_surface_is_symbolic = FALSE;
+        }
+
+      if (change == NULL ||
+          (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_ICON_SIZE) &&
+          !GTK_IS_CSS_TRANSIENT_NODE (self->node)))
+        gtk_widget_queue_resize (self->owner);
     }
 }