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// Copyright 2016 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.
#ifndef CHROME_BROWSER_UI_COCOA_FULLSCREEN_LOW_POWER_COORDINATOR_H_
#define CHROME_BROWSER_UI_COCOA_FULLSCREEN_LOW_POWER_COORDINATOR_H_
#include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
#include "ui/accelerated_widget_mac/fullscreen_low_power_coordinator.h"
@class FullscreenLowPowerWindow;
// This class coordinates switching to and from the fullscreen low power
// NSWindow. This is created by the BrowserWindowController when entering
// fullscreen mode. If it is ``safe'' to use the fullscreen low power window,
// this will move that NSWindow in front of the browser NSWindow.
//
// Whether or not it is ``safe'' to use the fullscreen low power window depends
// on two sources of input: The AcceleratedWidgetMac, which tells this whether
// or not the current web content can be displayed in fullscreen low power mode,
// and the BrowserWindowController, which tells this whether or not there is any
// UI that the fullscreen low power window would cover.
class FullscreenLowPowerCoordinatorCocoa
: public ui::FullscreenLowPowerCoordinator {
public:
FullscreenLowPowerCoordinatorCocoa(NSWindow* content_window,
ui::AcceleratedWidgetMac* widget);
~FullscreenLowPowerCoordinatorCocoa();
// Interface to BrowserWindowController.
NSWindow* GetFullscreenLowPowerWindow();
// Note that the initial transition state is in-transition.
void SetInFullscreenTransition(bool in_fullscreen_transition);
void SetLayoutParameters(const NSRect& toolbar_frame,
const NSRect& infobar_frame,
const NSRect& content_frame,
const NSRect& download_shelf_frame);
void SetHasActiveSheet(bool has_sheet);
void ChildWindowsChanged();
// ui::FullscreenLowPowerCoordinator implementation.
void SetLowPowerLayerValid(bool valid) override;
void WillLoseAcceleratedWidget() override;
// Call EnterOrExitLowPowerModeIfNeeded to wind down counters.
void TickEnterOrExitForTesting();
private:
// Determine if we should be fullscreen low power mode, and enter or exit
// the mode as needed.
void EnterOrExitLowPowerModeIfNeeded();
// The main fullscreen window.
base::scoped_nsobject<NSWindow> content_window_;
// Weak, reset by WillLoseAcceleratedWidget before it goes away.
ui::AcceleratedWidgetMac* widget_ = nullptr;
// The window that we will put in front of the main fullscreen window when we
// can.
base::scoped_nsobject<FullscreenLowPowerWindow> low_power_window_;
// Don't use the fullscreen low power window until we have completely
// transitioned to low power mode.
bool allowed_by_fullscreen_transition_ = false;
// Set by the AcceleratedWidgetHost with each frame to indicate if the low
// power layer's contents are valid.
bool low_power_layer_valid_ = false;
// Set if the NSView hierarchy allows low power mode. Low power mode is only
// allowed when nothing but the web contents is on-screen.
bool allowed_by_nsview_layout_ = true;
// Set if there are no NSWindows that would be covered by the fullscreen low
// power window.
bool allowed_by_child_windows_ = false;
// Set if there are no sheets (modal dialogues) that would be covered by the
// fullscreen low power window.
bool allowed_by_active_sheet_ = false;
// Updated by EnterOrExitLowPowerModeIfNeeded.
enum State {
// The fullscreen low power window is hidden behind the main window.
Disabled,
// The fullscreen low power window is still hidden, but is counting up
// transition frames before showing itself.
WarmingUp,
// The fullscreen low power window is in front of the main window.
Enabled,
};
State state_ = Disabled;
uint64_t frames_in_state_ = 0;
};
#endif // CHROME_BROWSER_UI_COCOA_FULLSCREEN_LOW_POWER_COORDINATOR_H_
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