Gtk3: Refactor GtkButtonImageSource::GetImageForScale

chrome/browser/ui/libgtkui/gtk_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/libgtkui/gtk_util.h"
 
 #include <dlfcn.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
@@ skipping 260 matching lines @@
   else if (actual_minor < minor)
     return false;
 
   static int actual_micro = gtk_get_micro_version();
   if (actual_micro >= micro)
     return true;
   else
     return false;
 }
 
+GtkStateFlags StateToStateFlags(ui::NativeTheme::State state) {
+  switch (state) {
+    case ui::NativeTheme::kDisabled:
+      return GTK_STATE_FLAG_INSENSITIVE;
+    case ui::NativeTheme::kHovered:
+      return GTK_STATE_FLAG_PRELIGHT;
+    case ui::NativeTheme::kNormal:
+      return GTK_STATE_FLAG_NORMAL;
+    case ui::NativeTheme::kPressed:
+      return static_cast<GtkStateFlags>(GTK_STATE_FLAG_PRELIGHT |
+                                        GTK_STATE_FLAG_ACTIVE);
+    default:
+      NOTREACHED();
+      return GTK_STATE_FLAG_NORMAL;
+  }
+}
+
 ScopedStyleContext AppendCssNodeToStyleContext(GtkStyleContext* context,
                                                const std::string& css_node) {
   GtkWidgetPath* path =
       context ? gtk_widget_path_copy(gtk_style_context_get_path(context))
               : gtk_widget_path_new();
 
   enum {
     CSS_TYPE,
     CSS_NAME,
     CSS_CLASS,
@@ skipping 240 matching lines @@
   }
 
   CairoSurface surface(gfx::Size(w, h));
   gtk_render_background(context, surface.cairo(), 0, 0, w, h);
   gtk_render_frame(context, surface.cairo(), 0, 0, w, h);
   return surface.GetAveragePixelValue(false);
 }
 #endif
 
 }  // namespace libgtkui