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// Copyright 2013 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/overview/window_selector_panels.h"
#include "ash/screen_util.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/overview/scoped_transform_overview_window.h"
#include "ash/wm/overview/transparent_activate_window_button.h"
#include "ash/wm/panels/panel_layout_manager.h"
#include "ash/wm/window_util.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/layer_animation_sequence.h"
#include "ui/views/controls/button/button.h"
namespace ash {
namespace {
// This class extends ScopedTransformOverviewMode to hide and show the callout
// widget for a panel window when entering / leaving overview mode, as well as
// to add a transparent button for each panel window.
class ScopedTransformPanelWindow : public ScopedTransformOverviewWindow {
public:
explicit ScopedTransformPanelWindow(aura::Window* window);
virtual ~ScopedTransformPanelWindow();
// ScopedTransformOverviewWindow overrides:
virtual void PrepareForOverview() override;
virtual void SetTransform(
aura::Window* root_window,
const gfx::Transform& transform,
bool animate) override;
private:
// Returns the panel window bounds after the transformation.
gfx::Rect GetTransformedBounds();
scoped_ptr<TransparentActivateWindowButton> window_button_;
DISALLOW_COPY_AND_ASSIGN(ScopedTransformPanelWindow);
};
ScopedTransformPanelWindow::ScopedTransformPanelWindow(aura::Window* window)
: ScopedTransformOverviewWindow(window) {
}
ScopedTransformPanelWindow::~ScopedTransformPanelWindow() {
}
void ScopedTransformPanelWindow::PrepareForOverview() {
ScopedTransformOverviewWindow::PrepareForOverview();
window_button_.reset(new TransparentActivateWindowButton(window()));
}
void ScopedTransformPanelWindow::SetTransform(
aura::Window* root_window,
const gfx::Transform& transform,
bool animate) {
ScopedTransformOverviewWindow::SetTransform(root_window, transform, animate);
window_button_->SetBounds(GetTransformedBounds());
}
gfx::Rect ScopedTransformPanelWindow::GetTransformedBounds() {
gfx::RectF bounds(ScreenUtil::ConvertRectToScreen(
window()->GetRootWindow(), window()->layer()->bounds()));
gfx::Transform new_transform;
new_transform.Translate(bounds.x(),
bounds.y());
new_transform.PreconcatTransform(window()->layer()->GetTargetTransform());
new_transform.Translate(-bounds.x(),
-bounds.y());
new_transform.TransformRect(&bounds);
return ToEnclosingRect(bounds);
}
} // namespace
WindowSelectorPanels::WindowSelectorPanels(aura::Window* panels_root_window)
: panels_root_window_(panels_root_window) {
static_cast<PanelLayoutManager*>(
Shell::GetContainer(panels_root_window_, kShellWindowId_PanelContainer)->
layout_manager())->SetShowCalloutWidgets(false);
}
WindowSelectorPanels::~WindowSelectorPanels() {
static_cast<PanelLayoutManager*>(
Shell::GetContainer(panels_root_window_, kShellWindowId_PanelContainer)->
layout_manager())->SetShowCalloutWidgets(true);
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); iter++) {
(*iter)->window()->RemoveObserver(this);
}
}
void WindowSelectorPanels::AddWindow(aura::Window* window) {
DCHECK(window->GetRootWindow() == panels_root_window_);
window->AddObserver(this);
transform_windows_.push_back(new ScopedTransformPanelWindow(window));
}
aura::Window* WindowSelectorPanels::GetRootWindow() {
return transform_windows_.front()->window()->GetRootWindow();
}
bool WindowSelectorPanels::HasSelectableWindow(const aura::Window* window) {
for (WindowList::const_iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
if ((*iter)->window() == window)
return true;
}
return false;
}
bool WindowSelectorPanels::Contains(const aura::Window* target) {
for (WindowList::const_iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
if ((*iter)->Contains(target))
return true;
}
return false;
}
void WindowSelectorPanels::RestoreWindowOnExit(aura::Window* window) {
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
if ((*iter)->Contains(window)) {
(*iter)->RestoreWindowOnExit();
break;
}
}
}
aura::Window* WindowSelectorPanels::SelectionWindow() {
return transform_windows_.front()->window();
}
void WindowSelectorPanels::RemoveWindow(const aura::Window* window) {
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
if ((*iter)->window() == window) {
(*iter)->window()->RemoveObserver(this);
(*iter)->OnWindowDestroyed();
transform_windows_.erase(iter);
break;
}
}
WindowSelectorItem::RemoveWindow(window);
}
bool WindowSelectorPanels::empty() const {
return transform_windows_.empty();
}
void WindowSelectorPanels::PrepareForOverview() {
// |panel_windows| will hold all the windows in the panel container, sorted
// according to their stacking order.
const aura::Window::Windows panels =
transform_windows_.front()->window()->parent()->children();
// Call PrepareForOverview() in the reverse stacking order so that the
// transparent windows that handle the events are in the correct stacking
// order.
size_t transformed_windows = 0;
for (aura::Window::Windows::const_reverse_iterator iter = panels.rbegin();
iter != panels.rend(); iter++) {
for (size_t j = 0; j < transform_windows_.size(); ++j) {
if (transform_windows_[j]->window() == (*iter)) {
transform_windows_[j]->PrepareForOverview();
transformed_windows++;
}
}
}
DCHECK(transformed_windows == transform_windows_.size());
}
void WindowSelectorPanels::SetItemBounds(aura::Window* root_window,
const gfx::Rect& target_bounds,
bool animate) {
gfx::Rect bounding_rect;
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
bounding_rect.Union((*iter)->GetBoundsInScreen());
}
set_bounds(ScopedTransformOverviewWindow::
ShrinkRectToFitPreservingAspectRatio(bounding_rect, target_bounds));
gfx::Transform bounding_transform =
ScopedTransformOverviewWindow::GetTransformForRect(bounding_rect,
bounds());
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); ++iter) {
gfx::Transform transform;
gfx::Rect bounds = (*iter)->GetBoundsInScreen();
transform.Translate(bounding_rect.x() - bounds.x(),
bounding_rect.y() - bounds.y());
transform.PreconcatTransform(bounding_transform);
transform.Translate(bounds.x() - bounding_rect.x(),
bounds.y() - bounding_rect.y());
(*iter)->SetTransform(root_window, transform, animate);
}
}
void WindowSelectorPanels::SetOpacity(float opacity) {
// TODO(flackr): find a way to make panels that are hidden behind other panels
// look nice.
for (WindowList::iterator iter = transform_windows_.begin();
iter != transform_windows_.end(); iter++) {
(*iter)->window()->layer()->SetOpacity(opacity);
}
WindowSelectorItem::SetOpacity(opacity);
}
} // namespace ash
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