import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/gtk/WidgetStyleCache.h

@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+#ifndef WidgetStyleCache_h
+#define WidgetStyleCache_h
+
+#include <gtk/gtk.h>
+#include "gtkdrawing.h"
+
+
+typedef unsigned StyleFlags;
+enum : StyleFlags {
+  NO_STYLE_FLAGS,
+  WHATEVER_MIGHT_BE_NEEDED = 1U << 0,
+};
+
+GtkWidget*
+GetWidget(WidgetNodeType aNodeType);
+
+/*
+ * Return a new style context based on aWidget, as a child of aParentStyle.
+ * If aWidget still has a floating reference, then it is sunk and released.
+ */
+GtkStyleContext*
+CreateStyleForWidget(GtkWidget* aWidget, GtkStyleContext* aParentStyle);
+
+GtkStyleContext*
+CreateCSSNode(const char*      aName,
+              GtkStyleContext* aParentStyle,
+              GType            aType = G_TYPE_NONE);
+
+// Callers must call ReleaseStyleContext() on the returned context.
+GtkStyleContext*
+ClaimStyleContext(WidgetNodeType aNodeType,
+                  GtkTextDirection aDirection = GTK_TEXT_DIR_NONE,
+                  GtkStateFlags aStateFlags = GTK_STATE_FLAG_NORMAL,
+                  StyleFlags aFlags = NO_STYLE_FLAGS);
+void
+ReleaseStyleContext(GtkStyleContext* style);
+
+void
+ResetWidgetCache(void);
+
+#endif // WidgetStyleCache_h