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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/base_layout_manager.h"
#include "ash/ash_switches.h"
#include "ash/screen_ash.h"
#include "ash/shell.h"
#include "ash/wm/shelf_layout_manager.h"
#include "ash/wm/window_animations.h"
#include "ash/wm/window_properties.h"
#include "ash/wm/window_util.h"
#include "base/command_line.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/ui_base_types.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/screen.h"
namespace {
// Given a |window| and tentative |restore_bounds|, returns new bounds that
// ensure that at least a few pixels of the screen background are visible
// outside the edges of the window. Use this to ensure that restoring a
// maximized window creates enough space that the resize handles are easily
// clickable. We get into this state when updating Chrome OS R18 to R19, as
// Chrome OS R18 and earlier used only maximized windows and set their restore
// bounds to the size of the screen. See crbug.com/108073
gfx::Rect BoundsWithScreenEdgeVisible(aura::Window* window,
const gfx::Rect& restore_bounds) {
// If the restore_bounds are more than 1 grid step away from the size the
// window would be when maximized, inset it.
int grid_size = ash::Shell::GetInstance()->GetGridSize();
gfx::Rect max_bounds = ash::ScreenAsh::GetMaximizedWindowBounds(window);
max_bounds.Inset(grid_size, grid_size);
if (restore_bounds.Contains(max_bounds))
return max_bounds;
return restore_bounds;
}
} // namespace
namespace ash {
namespace internal {
/////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, public:
BaseLayoutManager::BaseLayoutManager(aura::RootWindow* root_window)
: root_window_(root_window) {
Shell::GetInstance()->AddShellObserver(this);
root_window_->AddRootWindowObserver(this);
root_window_->AddObserver(this);
}
BaseLayoutManager::~BaseLayoutManager() {
if (root_window_) {
root_window_->RemoveObserver(this);
root_window_->RemoveRootWindowObserver(this);
}
for (WindowSet::const_iterator i = windows_.begin(); i != windows_.end(); ++i)
(*i)->RemoveObserver(this);
Shell::GetInstance()->RemoveShellObserver(this);
}
/////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, LayoutManager overrides:
void BaseLayoutManager::OnWindowResized() {
}
void BaseLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
windows_.insert(child);
child->AddObserver(this);
// Only update the bounds if the window has a show state that depends on the
// workspace area.
if (wm::IsWindowMaximized(child) || wm::IsWindowFullscreen(child))
UpdateBoundsFromShowState(child, false);
}
void BaseLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) {
windows_.erase(child);
child->RemoveObserver(this);
}
void BaseLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {
}
void BaseLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child,
bool visible) {
if (visible && wm::IsWindowMinimized(child)) {
// Attempting to show a minimized window. Unminimize it.
child->SetProperty(aura::client::kShowStateKey,
child->GetProperty(internal::kRestoreShowStateKey));
child->ClearProperty(internal::kRestoreShowStateKey);
}
}
void BaseLayoutManager::SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) {
gfx::Rect child_bounds(requested_bounds);
// Some windows rely on this to set their initial bounds.
if (wm::IsWindowMaximized(child))
child_bounds = ScreenAsh::GetMaximizedWindowBounds(child);
else if (wm::IsWindowFullscreen(child))
child_bounds = gfx::Screen::GetDisplayNearestWindow(child).bounds();
SetChildBoundsDirect(child, child_bounds);
}
/////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, RootWindowObserver overrides:
void BaseLayoutManager::OnRootWindowResized(const aura::RootWindow* root,
const gfx::Size& old_size) {
AdjustWindowSizesForScreenChange();
}
/////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, ash::ShellObserver overrides:
void BaseLayoutManager::OnMonitorWorkAreaInsetsChanged() {
AdjustWindowSizesForScreenChange();
}
/////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, WindowObserver overrides:
void BaseLayoutManager::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
if (key == aura::client::kShowStateKey) {
ui::WindowShowState old_state = static_cast<ui::WindowShowState>(old);
// Minimized state handles its own animations.
bool animate = (old_state != ui::SHOW_STATE_MINIMIZED);
UpdateBoundsFromShowState(window, animate);
ShowStateChanged(window, old_state);
}
}
void BaseLayoutManager::OnWindowDestroying(aura::Window* window) {
if (root_window_ == window) {
root_window_->RemoveObserver(this);
root_window_ = NULL;
}
}
//////////////////////////////////////////////////////////////////////////////
// BaseLayoutManager, private:
void BaseLayoutManager::ShowStateChanged(aura::Window* window,
ui::WindowShowState last_show_state) {
if (wm::IsWindowMinimized(window)) {
// Save the previous show state so that we can correctly restore it.
window->SetProperty(internal::kRestoreShowStateKey, last_show_state);
SetWindowVisibilityAnimationType(
window, WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
// Hide the window.
window->Hide();
// Activate another window.
if (wm::IsActiveWindow(window))
wm::DeactivateWindow(window);
} else if ((window->TargetVisibility() ||
last_show_state == ui::SHOW_STATE_MINIMIZED) &&
!window->layer()->visible()) {
// The layer may be hidden if the window was previously minimized. Make
// sure it's visible.
window->Show();
}
}
void BaseLayoutManager::UpdateBoundsFromShowState(aura::Window* window,
bool animate) {
switch (window->GetProperty(aura::client::kShowStateKey)) {
case ui::SHOW_STATE_DEFAULT:
case ui::SHOW_STATE_NORMAL: {
const gfx::Rect* restore = GetRestoreBounds(window);
if (restore) {
MaybeAnimateToBounds(window,
animate,
BoundsWithScreenEdgeVisible(window, *restore));
}
window->ClearProperty(aura::client::kRestoreBoundsKey);
break;
}
case ui::SHOW_STATE_MAXIMIZED:
SetRestoreBoundsIfNotSet(window);
MaybeAnimateToBounds(window,
animate,
ScreenAsh::GetMaximizedWindowBounds(window));
break;
case ui::SHOW_STATE_FULLSCREEN:
SetRestoreBoundsIfNotSet(window);
// Don't animate the full-screen window transition.
// TODO(jamescook): Use animation here. Be sure the lock screen works.
SetChildBoundsDirect(
window, gfx::Screen::GetDisplayNearestWindow(window).bounds());
break;
default:
break;
}
}
void BaseLayoutManager::MaybeAnimateToBounds(aura::Window* window,
bool animate,
const gfx::Rect& new_bounds) {
// Only animate visible windows.
if (animate &&
window->TargetVisibility() &&
!window->GetProperty(aura::client::kAnimationsDisabledKey) &&
!CommandLine::ForCurrentProcess()->HasSwitch(
ash::switches::kAshWindowAnimationsDisabled)) {
CrossFadeToBounds(window, new_bounds);
return;
}
SetChildBoundsDirect(window, new_bounds);
}
void BaseLayoutManager::AdjustWindowSizesForScreenChange() {
// If a user plugs an external monitor into a laptop running Aura the
// monitor size will change. Maximized windows need to resize to match.
// We also do this when developers running Aura on a desktop manually resize
// the host window.
// We also need to do this when the work area insets changes.
for (WindowSet::const_iterator it = windows_.begin();
it != windows_.end();
++it) {
aura::Window* window = *it;
if (wm::IsWindowMaximized(window)) {
SetChildBoundsDirect(window, ScreenAsh::GetMaximizedWindowBounds(window));
} else if (wm::IsWindowFullscreen(window)) {
SetChildBoundsDirect(
window, gfx::Screen::GetDisplayNearestWindow(window).bounds());
} else {
// The work area may be smaller than the full screen.
gfx::Rect monitor_rect =
gfx::Screen::GetDisplayNearestWindow(window).work_area();
// Put as much of the window as possible within the monitor area.
window->SetBounds(window->bounds().AdjustToFit(monitor_rect));
}
}
}
} // namespace internal
} // namespace ash
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