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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 "ash/wm/compact_layout_manager.h"
#include <vector>
#include "ash/shell.h"
#include "ash/shell_delegate.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/window_util.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"
#include "ui/gfx/compositor/layer.h"
#include "ui/gfx/compositor/layer_animation_sequence.h"
#include "ui/gfx/compositor/scoped_layer_animation_settings.h"
#include "ui/gfx/screen.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace internal {
namespace {
typedef std::vector<aura::Window*> WindowList;
typedef std::vector<aura::Window*>::const_iterator WindowListConstIter;
// Convenience method to get the layer of this container.
ui::Layer* GetDefaultContainerLayer() {
return Shell::GetInstance()->GetContainer(
internal::kShellWindowId_DefaultContainer)->layer();
}
// Whether it is a window that should be animated on entrance.
bool ShouldAnimateOnEntrance(aura::Window* window) {
return window &&
window->type() == aura::client::WINDOW_TYPE_NORMAL &&
wm::IsWindowMaximized(window);
}
// Adjust layer bounds to grow or shrink in |delta_width|.
void AdjustContainerLayerWidth(int delta_width) {
gfx::Rect bounds(GetDefaultContainerLayer()->bounds());
bounds.set_width(bounds.width() + delta_width);
GetDefaultContainerLayer()->SetBounds(bounds);
}
} // namespace
/////////////////////////////////////////////////////////////////////////////
// CompactLayoutManager, public:
CompactLayoutManager::CompactLayoutManager()
: status_area_widget_(NULL),
current_window_(NULL) {
}
CompactLayoutManager::~CompactLayoutManager() {
}
/////////////////////////////////////////////////////////////////////////////
// CompactLayoutManager, LayoutManager overrides:
void CompactLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
// Windows added to this container does not need extra animation.
if (child->type() == aura::client::WINDOW_TYPE_NORMAL)
child->SetProperty(aura::client::kAnimationsDisabledKey, true);
BaseLayoutManager::OnWindowAddedToLayout(child);
UpdateStatusAreaVisibility();
if (windows().size() > 1 &&
child->type() == aura::client::WINDOW_TYPE_NORMAL) {
// The first window is already contained in the current layer,
// add subsequent windows to layer bounds calculation.
AdjustContainerLayerWidth(child->bounds().width());
}
}
void CompactLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) {
BaseLayoutManager::OnWillRemoveWindowFromLayout(child);
UpdateStatusAreaVisibility();
if (windows().size() > 1 && ShouldAnimateOnEntrance(child))
AdjustContainerLayerWidth(-child->bounds().width());
if (child == current_window_) {
LayoutWindows(current_window_);
SwitchToReplacementWindow();
}
// Allow window to be animated by others.
if (child->type() == aura::client::WINDOW_TYPE_NORMAL)
child->SetProperty(aura::client::kAnimationsDisabledKey, false);
}
void CompactLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child,
bool visible) {
BaseLayoutManager::OnChildWindowVisibilityChanged(child, visible);
UpdateStatusAreaVisibility();
if (ShouldAnimateOnEntrance(child)) {
LayoutWindows(visible ? NULL : child);
if (visible) {
current_window_ = child;
AnimateSlideTo(child->bounds().x());
} else if (child == current_window_) {
SwitchToReplacementWindow();
}
}
}
void CompactLayoutManager::SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) {
gfx::Rect child_bounds(requested_bounds);
// Avoid a janky resize on startup by ensuring the initial bounds fill the
// screen.
if (wm::IsWindowMaximized(child))
child_bounds = gfx::Screen::GetMonitorWorkAreaNearestWindow(child);
else if (wm::IsWindowFullscreen(child))
child_bounds = gfx::Screen::GetMonitorAreaNearestWindow(child);
else if (current_window_) {
// All other windows should be offset by the current viewport.
int offset_x = current_window_->bounds().x();
child_bounds.Offset(offset_x, 0);
}
SetChildBoundsDirect(child, child_bounds);
}
/////////////////////////////////////////////////////////////////////////////
// CompactLayoutManager, aura::WindowObserver overrides:
void CompactLayoutManager::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
BaseLayoutManager::OnWindowPropertyChanged(window, key, old);
if (key == aura::client::kShowStateKey)
UpdateStatusAreaVisibility();
}
void CompactLayoutManager::OnWindowStackingChanged(aura::Window* window) {
if (!current_window_ || ShouldAnimateOnEntrance(window)) {
if (current_window_ != window) {
LayoutWindows(current_window_);
current_window_ = window;
} else {
// Same window as |current_window_|, and already animating.
if (GetDefaultContainerLayer()->GetAnimator()->is_animating())
return;
}
// Animate to |window| when there is a stacking change.
AnimateSlideTo(window->bounds().x());
}
}
/////////////////////////////////////////////////////////////////////////////
// CompactLayoutManager, AnimationDelegate overrides:
void CompactLayoutManager::OnImplicitAnimationsCompleted() {
if (!GetDefaultContainerLayer()->GetAnimator()->is_animating())
HideWindows();
}
//////////////////////////////////////////////////////////////////////////////
// CompactLayoutManager, private:
void CompactLayoutManager::UpdateStatusAreaVisibility() {
if (!status_area_widget_)
return;
// Full screen windows should hide the status area widget.
bool has_fullscreen = wm::HasFullscreenWindow(windows());
bool widget_visible = status_area_widget_->IsVisible();
if (has_fullscreen && widget_visible)
status_area_widget_->Hide();
else if (!has_fullscreen && !widget_visible)
status_area_widget_->Show();
}
void CompactLayoutManager::AnimateSlideTo(int offset_x) {
GetDefaultContainerLayer()->GetAnimator()->RemoveObserver(this);
ui::ScopedLayerAnimationSettings settings(
GetDefaultContainerLayer()->GetAnimator());
settings.AddObserver(this);
ui::Transform transform;
transform.ConcatTranslate(-offset_x, 0);
GetDefaultContainerLayer()->SetTransform(transform); // Will be animated!
}
void CompactLayoutManager::LayoutWindows(aura::Window* skip) {
ShellDelegate* shell_delegate = ash::Shell::GetInstance()->delegate();
const WindowList& windows_list = shell_delegate->GetCycleWindowList(
ShellDelegate::SOURCE_KEYBOARD,
ShellDelegate::ORDER_LINEAR);
int new_x = 0;
for (WindowListConstIter const_it = windows_list.begin();
const_it != windows_list.end();
++const_it) {
if (*const_it != skip) {
gfx::Rect new_bounds((*const_it)->bounds());
new_bounds.set_x(new_x);
SetChildBoundsDirect(*const_it, new_bounds);
(*const_it)->layer()->SetVisible(true);
new_x += (*const_it)->bounds().width();
}
}
}
void CompactLayoutManager::HideWindows() {
// If we do not know which one is the current window, or if the current
// window is not visible, do not attempt to hide the windows.
if (current_window_ == NULL)
return;
// Current window should be visible, if not it is an error and we shouldn't
// proceed.
if (!current_window_->layer()->visible())
NOTREACHED() << "Current window is invisible";
ShellDelegate* shell_delegate = ash::Shell::GetInstance()->delegate();
const WindowList& windows_list = shell_delegate->GetCycleWindowList(
ShellDelegate::SOURCE_KEYBOARD,
ShellDelegate::ORDER_LINEAR);
for (WindowListConstIter const_it = windows_list.begin();
const_it != windows_list.end();
++const_it) {
if (*const_it != current_window_)
(*const_it)->layer()->SetVisible(false);
}
}
aura::Window* CompactLayoutManager::FindReplacementWindow(
aura::Window* window) {
ShellDelegate* shell_delegate = ash::Shell::GetInstance()->delegate();
const WindowList& windows_list = shell_delegate->GetCycleWindowList(
ShellDelegate::SOURCE_KEYBOARD,
ShellDelegate::ORDER_LINEAR);
WindowListConstIter const_it = std::find(windows_list.begin(),
windows_list.end(),
window);
if (windows_list.size() > 1 && const_it != windows_list.end()) {
do {
++const_it;
if (const_it == windows_list.end())
const_it = windows_list.begin();
} while (*const_it != window && !(*const_it)->IsVisible());
if (*const_it != window)
return *const_it;
}
return NULL;
}
void CompactLayoutManager::SwitchToReplacementWindow() {
current_window_ = FindReplacementWindow(current_window_);
if (current_window_) {
wm::ActivateWindow(current_window_);
AnimateSlideTo(current_window_->bounds().x());
}
}
} // namespace internal
} // namespace ash
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