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// Copyright 2015 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 "mash/wm/layout_manager.h"
#include <stdint.h>
#include "components/mus/public/cpp/property_type_converters.h"
#include "components/mus/public/cpp/window.h"
#include "components/mus/public/cpp/window_property.h"
namespace mash {
namespace wm {
LayoutManager::~LayoutManager() {
Uninstall();
}
LayoutManager::LayoutManager(mus::Window* owner) : owner_(owner) {
owner_->AddObserver(this);
DCHECK(owner->children().empty());
}
void LayoutManager::Uninstall() {
if (!owner_)
return;
owner_->RemoveObserver(this);
for (auto child : owner_->children())
child->RemoveObserver(this);
owner_ = nullptr;
}
void LayoutManager::OnTreeChanged(
const mus::WindowObserver::TreeChangeParams& params) {
DCHECK(params.target);
if (params.new_parent == owner_) {
// params.target was added to the layout.
WindowAdded(params.target);
params.target->AddObserver(this);
LayoutWindow(params.target);
} else if (params.old_parent == owner_) {
// params.target was removed from the layout.
params.target->RemoveObserver(this);
WindowRemoved(params.target);
}
}
void LayoutManager::OnWindowDestroying(mus::Window* window) {
if (owner_ == window)
Uninstall();
}
void LayoutManager::OnWindowBoundsChanged(mus::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) {
if (window != owner_)
return;
// Changes to the container's bounds require all windows to be laid out.
for (auto child : window->children())
LayoutWindow(child);
}
void LayoutManager::OnWindowSharedPropertyChanged(
mus::Window* window,
const std::string& name,
const std::vector<uint8_t>* old_data,
const std::vector<uint8_t>* new_data) {
if (window == owner_)
return;
// Changes to the following properties require the window to be laid out.
if (layout_properties_.count(name) > 0)
LayoutWindow(window);
}
void LayoutManager::WindowAdded(mus::Window* window) {}
void LayoutManager::WindowRemoved(mus::Window* window) {}
void LayoutManager::AddLayoutProperty(const std::string& name) {
layout_properties_.insert(name);
}
} // namespace wm
} // namespace mash
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