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// 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 "ui/views/corewm/window_util.h"
#include "ui/aura/client/activation_client.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace {
// Helper method for RecreateWindowLayers() which adds all the existing layers
// for |view| and its descendants to |parent_layer|. New layers are created for
// |view| (if it previously had a layer) and any descendants which previously
// had layers. The new layers are blank, so nothing has been painted to them
// yet. Returns true if this method added at least one layer to |parent_layer|.
bool RecreateViewLayers(ui::Layer* parent_layer, views::View* view) {
bool recreated_layer = false;
if (view->layer()) {
ui::Layer* layer = view->RecreateLayer();
if (layer) {
layer->SuppressPaint();
parent_layer->Add(layer);
parent_layer = layer;
recreated_layer = true;
}
}
for (int i = 0; i < view->child_count(); ++i)
recreated_layer |= RecreateViewLayers(parent_layer, view->child_at(i));
return recreated_layer;
}
} // namespace
namespace views {
namespace corewm {
void ActivateWindow(aura::Window* window) {
DCHECK(window);
DCHECK(window->GetRootWindow());
aura::client::GetActivationClient(window->GetRootWindow())->ActivateWindow(
window);
}
void DeactivateWindow(aura::Window* window) {
DCHECK(window);
DCHECK(window->GetRootWindow());
aura::client::GetActivationClient(window->GetRootWindow())->DeactivateWindow(
window);
}
bool IsActiveWindow(aura::Window* window) {
DCHECK(window);
if (!window->GetRootWindow())
return false;
aura::client::ActivationClient* client =
aura::client::GetActivationClient(window->GetRootWindow());
return client && client->GetActiveWindow() == window;
}
bool CanActivateWindow(aura::Window* window) {
DCHECK(window);
if (!window->GetRootWindow())
return false;
aura::client::ActivationClient* client =
aura::client::GetActivationClient(window->GetRootWindow());
return client && client->CanActivateWindow(window);
}
aura::Window* GetActivatableWindow(aura::Window* window) {
aura::client::ActivationClient* client =
aura::client::GetActivationClient(window->GetRootWindow());
return client ? client->GetActivatableWindow(window) : NULL;
}
aura::Window* GetToplevelWindow(aura::Window* window) {
aura::client::ActivationClient* client =
aura::client::GetActivationClient(window->GetRootWindow());
return client ? client->GetToplevelWindow(window) : NULL;
}
void DeepDeleteLayers(ui::Layer* layer) {
std::vector<ui::Layer*> children = layer->children();
for (std::vector<ui::Layer*>::const_iterator it = children.begin();
it != children.end();
++it) {
ui::Layer* child = *it;
DeepDeleteLayers(child);
}
delete layer;
}
ui::Layer* RecreateWindowLayers(aura::Window* window, bool set_bounds) {
const gfx::Rect bounds = window->bounds();
ui::Layer* old_layer = window->RecreateLayer();
DCHECK(old_layer);
// Cache the order of |window|'s child layers. If |window| belongs to a widget
// and the widget has both child windows and child views with layers,
// |initial_layer_order| is used to determine the relative order.
std::vector<ui::Layer*> initial_layer_order = window->layer()->children();
// Recreate the layers for any child windows of |window|.
for (aura::Window::Windows::const_iterator it = window->children().begin();
it != window->children().end();
++it) {
old_layer->Add(RecreateWindowLayers(*it, set_bounds));
}
// Recreate the layers for any child views of |widget|.
bool has_view_layers = false;
views::Widget* widget = views::Widget::GetWidgetForNativeView(window);
if (widget && widget->GetRootView())
has_view_layers = RecreateViewLayers(old_layer, widget->GetRootView());
if (has_view_layers && !window->children().empty()) {
// RecreateViewLayers() added the view layers above the window layers in
// z-order. The window layers and the view layers may have been originally
// intermingled. Reorder |old_layer|'s children based on the initial
// order.
for (size_t i = 0; i < initial_layer_order.size(); ++i) {
ui::Layer* layer = initial_layer_order[i];
std::vector<ui::Layer*>::const_iterator it = std::find(
old_layer->children().begin(), old_layer->children().end(), layer);
if (it != old_layer->children().end())
old_layer->StackAtTop(layer);
}
}
if (set_bounds)
window->SetBounds(bounds);
return old_layer;
}
} // namespace corewm
} // namespace views
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