1 files changed, 105 insertions, 0 deletions
diff --git a/ui/views/widget/gtk_views_fixed.cc b/ui/views/widget/gtk_views_fixed.cc
new file mode 100644
index 0000000..60aed5c
--- /dev/null
+++ b/ui/views/widget/gtk_views_fixed.cc
@@ -0,0 +1,105 @@
+// Copyright (c) 2011 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 "ui/views/widget/gtk_views_fixed.h"
+
+#include "base/logging.h"
+
+// We store whether we use the widget's allocated size as a property. Ideally
+// we would stash this in GtkFixedChild, but GtkFixed doesn't allow subclassing
+// gtk_fixed_put. Alternatively we could subclass GtkContainer and use our own
+// API (effectively duplicating GtkFixed), but that means folks could no longer
+// use the GtkFixed API else where in Chrome. For now I'm going with this route.
+static const char* kUseAllocatedSize = "__VIEWS_USE_ALLOCATED_SIZE__";
+static const char* kRequisitionWidth = "__VIEWS_REQUISITION_WIDTH__";
+static const char* kRequisitionHeight = "__VIEWS_REQUISITION_HEIGHT__";
+
+G_BEGIN_DECLS
+
+G_DEFINE_TYPE(GtkViewsFixed, gtk_views_fixed, GTK_TYPE_FIXED)
+
+static void gtk_views_fixed_size_allocate(GtkWidget* widget,
+                                          GtkAllocation* allocation) {
+  widget->allocation = *allocation;
+  if (!GTK_WIDGET_NO_WINDOW(widget) && GTK_WIDGET_REALIZED(widget)) {
+    gdk_window_move_resize(widget->window, allocation->x, allocation->y,
+                           allocation->width, allocation->height);
+  }
+
+  int border_width = GTK_CONTAINER(widget)->border_width;
+  GList* children = GTK_FIXED(widget)->children;
+  while (children) {
+    GtkFixedChild* child = reinterpret_cast<GtkFixedChild*>(children->data);
+    children = children->next;
+
+    if (GTK_WIDGET_VISIBLE(child->widget)) {
+      GtkAllocation child_allocation;
+
+      int width, height;
+      bool use_allocated_size =
+          gtk_views_fixed_get_widget_size(child->widget, &width, &height);
+      if (use_allocated_size) {
+        // NOTE: even though the size isn't changing, we have to call
+        // size_allocate, otherwise things like buttons won't repaint.
+        child_allocation.width = width;
+        child_allocation.height = height;
+      } else {
+        GtkRequisition child_requisition;
+        gtk_widget_get_child_requisition(child->widget, &child_requisition);
+        child_allocation.width = child_requisition.width;
+        child_allocation.height = child_requisition.height;
+      }
+      child_allocation.x = child->x + border_width;
+      child_allocation.y = child->y + border_width;
+
+      if (GTK_WIDGET_NO_WINDOW(widget)) {
+        child_allocation.x += widget->allocation.x;
+        child_allocation.y += widget->allocation.y;
+      }
+
+      gtk_widget_size_allocate(child->widget, &child_allocation);
+    }
+  }
+}
+
+static void gtk_views_fixed_class_init(GtkViewsFixedClass* views_fixed_class) {
+  GtkWidgetClass* widget_class =
+      reinterpret_cast<GtkWidgetClass*>(views_fixed_class);
+  widget_class->size_allocate = gtk_views_fixed_size_allocate;
+}
+
+static void gtk_views_fixed_init(GtkViewsFixed* fixed) {
+  GTK_WIDGET_SET_FLAGS(GTK_WIDGET(fixed), GTK_CAN_FOCUS);
+}
+
+GtkWidget* gtk_views_fixed_new(void) {
+  return GTK_WIDGET(g_object_new(GTK_TYPE_VIEWS_FIXED, NULL));
+}
+
+void gtk_views_fixed_set_widget_size(GtkWidget* widget,
+                                     int width, int height) {
+  // Remember the allocation request, and set this widget up to use it.
+  bool use_requested_size = (width != 0 && height != 0);
+  g_object_set_data(G_OBJECT(widget), kUseAllocatedSize,
+                    reinterpret_cast<gpointer>(use_requested_size ? 1 : 0));
+  g_object_set_data(G_OBJECT(widget), kRequisitionWidth,
+                    reinterpret_cast<gpointer>(width));
+  g_object_set_data(G_OBJECT(widget), kRequisitionHeight,
+                    reinterpret_cast<gpointer>(height));
+
+  gtk_widget_queue_resize(widget);
+}
+
+bool gtk_views_fixed_get_widget_size(GtkWidget* widget,
+                                     int* width, int* height) {
+  DCHECK(width);
+  DCHECK(height);
+  *width = reinterpret_cast<glong>(g_object_get_data(G_OBJECT(widget),
+                                                     kRequisitionWidth));
+  *height = reinterpret_cast<glong>(g_object_get_data(G_OBJECT(widget),
+                                                      kRequisitionHeight));
+  return (g_object_get_data(G_OBJECT(widget), kUseAllocatedSize) != 0);
+}
+
+G_END_DECLS