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// Copyright 2020 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/display_highlight_controller.h"
#include "ash/accessibility/magnifier/fullscreen_magnifier_controller.h"
#include "ash/display/window_tree_host_manager.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/session/session_controller_impl.h"
#include "ash/shell.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_type.h"
#include "ui/compositor/paint_recorder.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/manager/display_manager_observer.h"
#include "ui/gfx/color_palette.h"
#include "ui/views/border.h"
#include "ui/wm/core/window_animations.h"
namespace ash {
namespace {
constexpr SkColor kHighlightColor = gfx::kGoogleBlue600;
constexpr int kHighlightSizeFactor = 128;
std::unique_ptr<views::Widget> CreateHighlightWidget(
const display::Display& display) {
const int64_t display_id = display.id();
DCHECK_NE(display_id, display::kInvalidDisplayId);
views::Widget::InitParams params(
views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET,
views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
params.activatable = views::Widget::InitParams::Activatable::kNo;
params.accept_events = false;
params.opacity = views::Widget::InitParams::WindowOpacity::kTranslucent;
aura::Window* root = Shell::GetRootWindowForDisplayId(display_id);
params.parent = root->GetChildById(kShellWindowId_ScreenAnimationContainer);
params.bounds = root->GetBoundsInRootWindow();
params.name = "DisplayIdentificationHighlight";
std::unique_ptr<views::Widget> highlight_widget =
std::make_unique<views::Widget>();
const int highlight_thickness =
std::max(params.bounds.width(), params.bounds.height()) /
kHighlightSizeFactor;
highlight_widget->Init(std::move(params));
highlight_widget->GetRootView()->SetBorder(
views::CreateSolidBorder(highlight_thickness, kHighlightColor));
auto* window = highlight_widget->GetNativeWindow();
window->SetId(kShellWindowId_DisplayIdentificationHighlightWindow);
::wm::SetWindowVisibilityAnimationTransition(window, ::wm::ANIMATE_NONE);
FullscreenMagnifierController* magnification_controller =
Shell::Get()->fullscreen_magnifier_controller();
// Forces a redraw of full-screen magnification in order to reverse
// magnification on display highlight window performed in
// FullscreenMagnifierController::ReDraw(). If redraw is not forced, then the
// highlight may not show up around the edges of the display properly until
// the next redraw.
if (magnification_controller->IsEnabled()) {
magnification_controller->MoveWindow(
magnification_controller->GetWindowPosition(), false);
}
highlight_widget->Show();
return highlight_widget;
}
} // namespace
DisplayHighlightController::DisplayHighlightController() {
Shell* shell = Shell::Get();
SessionControllerImpl* session_controller = shell->session_controller();
session_controller->AddObserver(this);
shell->display_manager()->AddDisplayManagerObserver(this);
is_locked_ = session_controller->IsScreenLocked();
}
DisplayHighlightController::~DisplayHighlightController() {
Shell* shell = Shell::Get();
shell->display_manager()->RemoveDisplayManagerObserver(this);
shell->session_controller()->RemoveObserver(this);
}
void DisplayHighlightController::UpdateDisplayIdentificationHighlight() {
if (selected_display_id_ == display::kInvalidDisplayId) {
highlight_widget_.reset();
return;
}
display::DisplayManager* display_manager = Shell::Get()->display_manager();
// If |selected_display_id_| does not correspond to an active display, we
// cannot display highlights.
if (!display_manager->IsActiveDisplayId(selected_display_id_)) {
highlight_widget_.reset();
return;
}
// If there is only one display, we don't need to show a special highlight for
// it since there is only one place for the user to look.
if (display_manager->GetNumDisplays() == 1) {
highlight_widget_.reset();
return;
}
// Don't show a highlight if the device is locked to ensure that the highlight
// does not appear on the login screen.
if (is_locked_) {
highlight_widget_.reset();
return;
}
highlight_widget_ = CreateHighlightWidget(
display_manager->GetDisplayForId(selected_display_id_));
}
void DisplayHighlightController::OnLockStateChanged(bool locked) {
is_locked_ = locked;
UpdateDisplayIdentificationHighlight();
}
void DisplayHighlightController::OnDidApplyDisplayChanges() {
UpdateDisplayIdentificationHighlight();
}
void DisplayHighlightController::OnDisplaysInitialized() {
UpdateDisplayIdentificationHighlight();
}
void DisplayHighlightController::SetHighlightedDisplay(int64_t display_id) {
if (selected_display_id_ != display_id) {
selected_display_id_ = display_id;
UpdateDisplayIdentificationHighlight();
}
}
} // namespace ash
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