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// Copyright 2014 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/display/screen_ash.h"
#include "ash/display/display_manager.h"
#include "ash/display/window_tree_host_manager.h"
#include "ash/root_window_controller.h"
#include "ash/root_window_settings.h"
#include "ash/shelf/shelf_layout_manager.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/wm/coordinate_conversion.h"
#include "base/logging.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/env.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/gfx/display.h"
#include "ui/gfx/display_finder.h"
#include "ui/gfx/screen.h"
namespace ash {
namespace {
DisplayManager* GetDisplayManager() {
return Shell::GetInstance()->display_manager();
}
class ScreenForShutdown : public gfx::Screen {
public:
explicit ScreenForShutdown(ScreenAsh* screen_ash)
: display_list_(screen_ash->GetAllDisplays()),
primary_display_(screen_ash->GetPrimaryDisplay()) {
}
// gfx::Screen overrides:
gfx::Point GetCursorScreenPoint() override { return gfx::Point(); }
gfx::NativeWindow GetWindowUnderCursor() override { return NULL; }
gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
return NULL;
}
int GetNumDisplays() const override { return display_list_.size(); }
std::vector<gfx::Display> GetAllDisplays() const override {
return display_list_;
}
gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override {
return primary_display_;
}
gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override {
return *gfx::FindDisplayNearestPoint(display_list_, point);
}
gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override {
const gfx::Display* matching =
gfx::FindDisplayWithBiggestIntersection(display_list_, match_rect);
// Fallback to the primary display if there is no matching display.
return matching ? *matching : GetPrimaryDisplay();
}
gfx::Display GetPrimaryDisplay() const override { return primary_display_; }
void AddObserver(gfx::DisplayObserver* observer) override {
NOTREACHED() << "Observer should not be added during shutdown";
}
void RemoveObserver(gfx::DisplayObserver* observer) override {}
private:
const std::vector<gfx::Display> display_list_;
const gfx::Display primary_display_;
DISALLOW_COPY_AND_ASSIGN(ScreenForShutdown);
};
} // namespace
ScreenAsh::ScreenAsh() {
}
ScreenAsh::~ScreenAsh() {
}
void ScreenAsh::NotifyMetricsChanged(const gfx::Display& display,
uint32_t metrics) {
FOR_EACH_OBSERVER(gfx::DisplayObserver,
observers_,
OnDisplayMetricsChanged(display, metrics));
}
void ScreenAsh::NotifyDisplayAdded(const gfx::Display& display) {
FOR_EACH_OBSERVER(gfx::DisplayObserver, observers_, OnDisplayAdded(display));
}
void ScreenAsh::NotifyDisplayRemoved(const gfx::Display& display) {
FOR_EACH_OBSERVER(
gfx::DisplayObserver, observers_, OnDisplayRemoved(display));
}
gfx::Point ScreenAsh::GetCursorScreenPoint() {
return aura::Env::GetInstance()->last_mouse_location();
}
gfx::NativeWindow ScreenAsh::GetWindowUnderCursor() {
return GetWindowAtScreenPoint(Shell::GetScreen()->GetCursorScreenPoint());
}
gfx::NativeWindow ScreenAsh::GetWindowAtScreenPoint(const gfx::Point& point) {
aura::Window* root_window = wm::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->GetTopWindowContainingPoint(local_point);
}
int ScreenAsh::GetNumDisplays() const {
return GetDisplayManager()->GetNumDisplays();
}
std::vector<gfx::Display> ScreenAsh::GetAllDisplays() const {
return GetDisplayManager()->active_display_list();
}
gfx::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);
int64_t id = rws->display_id;
// if id is |kInvaildDisplayID|, it's being deleted.
DCHECK(id != gfx::Display::kInvalidDisplayID);
if (id == gfx::Display::kInvalidDisplayID)
return GetPrimaryDisplay();
DisplayManager* display_manager = GetDisplayManager();
// RootWindow needs Display to determine its device scale factor
// for non desktop display.
gfx::Display mirroring_display = display_manager->GetMirroringDisplayById(id);
if (mirroring_display.is_valid())
return mirroring_display;
return display_manager->GetDisplayForId(id);
}
gfx::Display ScreenAsh::GetDisplayNearestPoint(const gfx::Point& point) const {
const gfx::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 *gfx::FindDisplayNearestPoint(
GetDisplayManager()->active_display_list(), point);
}
gfx::Display ScreenAsh::GetDisplayMatching(const gfx::Rect& match_rect) const {
if (match_rect.IsEmpty())
return GetDisplayNearestPoint(match_rect.origin());
const gfx::Display* matching = gfx::FindDisplayWithBiggestIntersection(
GetDisplayManager()->active_display_list(), match_rect);
// Fallback to the primary display if there is no matching display.
return matching ? *matching : GetPrimaryDisplay();
}
gfx::Display ScreenAsh::GetPrimaryDisplay() const {
return GetDisplayManager()->GetDisplayForId(
WindowTreeHostManager::GetPrimaryDisplayId());
}
void ScreenAsh::AddObserver(gfx::DisplayObserver* observer) {
observers_.AddObserver(observer);
}
void ScreenAsh::RemoveObserver(gfx::DisplayObserver* observer) {
observers_.RemoveObserver(observer);
}
gfx::Screen* ScreenAsh::CloneForShutdown() {
return new ScreenForShutdown(this);
}
} // namespace ash
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