// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/display/screen_ash.h"
#include "ash/constants/ash_switches.h"
#include "ash/display/window_tree_host_manager.h"
#include "ash/public/cpp/window_finder.h"
#include "ash/root_window_controller.h"
#include "ash/root_window_settings.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/wm/window_util.h"
#include "base/check.h"
#include "base/command_line.h"
#include "base/notreached.h"
#include "chromeos/dbus/power_manager/backlight.pb.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/display/display.h"
#include "ui/display/display_finder.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/screen.h"
#include "ui/display/types/display_constants.h"
namespace ash {
namespace {
// Intentionally leaked in production.
display::Screen* screen_for_shutdown = nullptr;
display::DisplayManager* GetDisplayManager() {
return Shell::Get()->display_manager();
}
class ScreenForShutdown : public display::Screen {
public:
explicit ScreenForShutdown(display::Screen* screen_ash)
: display_list_(screen_ash->GetAllDisplays()),
primary_display_(screen_ash->GetPrimaryDisplay()) {
SetDisplayForNewWindows(primary_display_.id());
set_shutdown(true);
}
ScreenForShutdown(const ScreenForShutdown&) = delete;
ScreenForShutdown& operator=(const ScreenForShutdown&) = delete;
// display::Screen overrides:
gfx::Point GetCursorScreenPoint() override { return gfx::Point(); }
bool IsWindowUnderCursor(gfx::NativeWindow window) override { return false; }
gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
return nullptr;
}
gfx::NativeWindow GetLocalProcessWindowAtPoint(
const gfx::Point& point,
const std::set<gfx::NativeWindow>& ignore) override {
return nullptr;
}
int GetNumDisplays() const override { return display_list_.size(); }
const std::vector<display::Display>& GetAllDisplays() const override {
return display_list_;
}
display::Display GetDisplayNearestWindow(
gfx::NativeView view) const override {
return primary_display_;
}
display::Display GetDisplayNearestPoint(
const gfx::Point& point) const override {
return *display::FindDisplayNearestPoint(display_list_, point);
}
display::Display GetDisplayMatching(
const gfx::Rect& match_rect) const override {
const display::Display* matching =
display::FindDisplayWithBiggestIntersection(display_list_, match_rect);
// Fallback to the primary display if there is no matching display.
return matching ? *matching : GetPrimaryDisplay();
}
display::Display GetPrimaryDisplay() const override {
return primary_display_;
}
void AddObserver(display::DisplayObserver* observer) override {
NOTREACHED() << "Observer should not be added during shutdown";
}
void RemoveObserver(display::DisplayObserver* observer) override {}
private:
const std::vector<display::Display> display_list_;
const display::Display primary_display_;
};
} // namespace
ScreenAsh::ScreenAsh() {
auto* power_manager = chromeos::PowerManagerClient::Get();
if (power_manager)
power_manager->AddObserver(this);
}
ScreenAsh::~ScreenAsh() {
auto* power_manager = chromeos::PowerManagerClient::Get();
if (power_manager)
power_manager->RemoveObserver(this);
}
void ScreenAsh::ScreenBrightnessChanged(
const power_manager::BacklightBrightnessChange& change) {
GetDisplayManager()->OnScreenBrightnessChanged(change.percent());
}
gfx::Point ScreenAsh::GetCursorScreenPoint() {
return aura::Env::GetInstance()->last_mouse_location();
}
bool ScreenAsh::IsWindowUnderCursor(gfx::NativeWindow window) {
return window->Contains(GetWindowAtScreenPoint(
display::Screen::GetScreen()->GetCursorScreenPoint()));
}
gfx::NativeWindow ScreenAsh::GetWindowAtScreenPoint(const gfx::Point& point) {
aura::Window* root_window = window_util::GetRootWindowAt(point);
aura::client::ScreenPositionClient* position_client =
aura::client::GetScreenPositionClient(root_window);
gfx::Point local_point = point;
if (position_client)
position_client->ConvertPointFromScreen(root_window, &local_point);
return root_window->GetEventHandlerForPoint(local_point);
}
gfx::NativeWindow ScreenAsh::GetLocalProcessWindowAtPoint(
const gfx::Point& point,
const std::set<gfx::NativeWindow>& ignore) {
return ash::GetTopmostWindowAtPoint(point, ignore);
}
int ScreenAsh::GetNumDisplays() const {
return GetDisplayManager()->GetNumDisplays();
}
const std::vector<display::Display>& ScreenAsh::GetAllDisplays() const {
return GetDisplayManager()->active_display_list();
}
display::Display ScreenAsh::GetDisplayNearestWindow(
gfx::NativeView window) const {
if (!window)
return GetPrimaryDisplay();
const aura::Window* root_window = window->GetRootWindow();
if (!root_window)
return GetPrimaryDisplay();
const RootWindowSettings* rws = GetRootWindowSettings(root_window);
CHECK(rws) << "Missing RootWindowSettings : window=" << window->GetName()
<< ", root=" << root_window->GetName();
int64_t id = rws->display_id;
// if id is |kInvaildDisplayID|, it's being deleted.
if (id == display::kInvalidDisplayId)
return GetPrimaryDisplay();
display::DisplayManager* display_manager = GetDisplayManager();
// RootWindow needs Display to determine its device scale factor
// for non desktop display.
display::Display mirroring_display =
display_manager->GetMirroringDisplayById(id);
if (mirroring_display.is_valid())
return mirroring_display;
return display_manager->GetDisplayForId(id);
}
void ScreenAsh::SetDisplayForNewWindows(int64_t display_id) {
if (display_id_for_new_windows() == display_id)
return;
Screen::SetDisplayForNewWindows(display_id);
Shell::Get()->NotifyDisplayForNewWindowsChanged();
}
display::Display ScreenAsh::GetDisplayNearestPoint(
const gfx::Point& point) const {
const display::Display& display =
GetDisplayManager()->FindDisplayContainingPoint(point);
if (display.is_valid())
return display;
// Fallback to the display that has the shortest Manhattan distance from
// the |point|. This is correct in the only areas that matter, namely in the
// corners between the physical screens.
return *display::FindDisplayNearestPoint(
GetDisplayManager()->active_only_display_list(), point);
}
display::Display ScreenAsh::GetDisplayMatching(
const gfx::Rect& match_rect) const {
if (match_rect.IsEmpty())
return GetDisplayNearestPoint(match_rect.origin());
const display::Display* matching =
display::FindDisplayWithBiggestIntersection(
GetDisplayManager()->active_only_display_list(), match_rect);
// Fallback to the primary display if there is no matching display.
return matching ? *matching : GetPrimaryDisplay();
}
display::Display ScreenAsh::GetPrimaryDisplay() const {
if (!WindowTreeHostManager::HasValidPrimaryDisplayId()) {
// This should only be allowed temporarily when there are no displays
// available and hence no primary display. In this case we return a default
// display to avoid crashes for display observers trying to get the primary
// display when notified with the removal of the last display.
// https://crbug.com/866714.
DCHECK(
Shell::Get()->window_tree_host_manager()->GetAllRootWindows().empty());
return display::DisplayManager::GetFakePrimaryDisplay();
}
return GetDisplayManager()->GetDisplayForId(
WindowTreeHostManager::GetPrimaryDisplayId());
}
void ScreenAsh::AddObserver(display::DisplayObserver* observer) {
GetDisplayManager()->AddDisplayObserver(observer);
}
void ScreenAsh::RemoveObserver(display::DisplayObserver* observer) {
GetDisplayManager()->RemoveDisplayObserver(observer);
}
display::TabletState ScreenAsh::GetTabletState() const {
return GetDisplayManager()->GetTabletState();
}
// static
std::unique_ptr<display::DisplayManager> ScreenAsh::CreateDisplayManager() {
auto screen = std::make_unique<ScreenAsh>();
display::Screen* current = display::Screen::GetScreen();
// If there is no native, or the native was for shutdown,
// use ash's screen.
if (!current || current == screen_for_shutdown)
display::Screen::SetScreenInstance(screen.get());
auto manager = std::make_unique<display::DisplayManager>(std::move(screen));
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kAshEnableTabletMode)) {
manager->set_internal_display_has_accelerometer(true);
}
return manager;
}
// static
void ScreenAsh::CreateScreenForShutdown() {
delete screen_for_shutdown;
screen_for_shutdown = new ScreenForShutdown(display::Screen::GetScreen());
display::Screen::SetScreenInstance(screen_for_shutdown);
}
// static
void ScreenAsh::DeleteScreenForShutdown() {
if (display::Screen::GetScreen() == screen_for_shutdown)
display::Screen::SetScreenInstance(nullptr);
delete screen_for_shutdown;
screen_for_shutdown = nullptr;
}
} // namespace ash
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