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// Copyright 2018 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/accessibility/ui/accessibility_panel_layout_manager.h"
#include "ash/root_window_controller.h"
#include "ash/shell.h"
#include "ash/wm/screen_pinning_controller.h"
#include "ash/wm/work_area_insets.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/wm/core/window_util.h"
#include "ui/wm/public/activation_client.h"
namespace ash {
AccessibilityPanelLayoutManager::AccessibilityPanelLayoutManager() {
Shell::Get()->activation_client()->AddObserver(this);
Shell::Get()->AddShellObserver(this);
}
AccessibilityPanelLayoutManager::~AccessibilityPanelLayoutManager() {
Shell::Get()->RemoveShellObserver(this);
Shell::Get()->activation_client()->RemoveObserver(this);
}
void AccessibilityPanelLayoutManager::SetAlwaysVisible(bool always_visible) {
always_visible_ = always_visible;
UpdateWindowBounds();
}
void AccessibilityPanelLayoutManager::SetPanelBounds(
const gfx::Rect& bounds,
AccessibilityPanelState state) {
if (!panel_window_)
return;
panel_bounds_ = bounds;
panel_state_ = state;
UpdateWindowBounds();
UpdateWorkAreaForPanelHeight();
}
void AccessibilityPanelLayoutManager::OnWindowAddedToLayout(
aura::Window* child) {
panel_window_ = child;
// Defer setting the window bounds until the extension is loaded and Chrome
// shows the widget.
}
void AccessibilityPanelLayoutManager::OnWindowRemovedFromLayout(
aura::Window* child) {
// NOTE: In browser_tests a second ChromeVoxPanel can be created while the
// first one is closing due to races between loading the extension and
// closing the widget. We only track the latest panel.
if (child == panel_window_)
panel_window_ = nullptr;
UpdateWorkAreaForPanelHeight();
}
void AccessibilityPanelLayoutManager::OnChildWindowVisibilityChanged(
aura::Window* child,
bool visible) {
if (child == panel_window_ && visible) {
UpdateWindowBounds();
UpdateWorkAreaForPanelHeight();
}
}
void AccessibilityPanelLayoutManager::SetChildBounds(
aura::Window* child,
const gfx::Rect& requested_bounds) {
SetChildBoundsDirect(child, requested_bounds);
}
void AccessibilityPanelLayoutManager::OnDisplayMetricsChanged(
const display::Display& display,
uint32_t changed_metrics) {
UpdateWindowBounds();
}
void AccessibilityPanelLayoutManager::OnWindowActivated(
ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
UpdateWindowBounds();
}
void AccessibilityPanelLayoutManager::OnFullscreenStateChanged(
bool is_fullscreen,
aura::Window* container) {
UpdateWindowBounds();
}
void AccessibilityPanelLayoutManager::UpdateWindowBounds() {
if (!panel_window_)
return;
aura::Window* root_window = panel_window_->GetRootWindow();
RootWindowController* root_controller =
RootWindowController::ForWindow(root_window);
gfx::Rect bounds = panel_bounds_;
// The panel can make itself fill the screen (including covering the shelf).
if (panel_state_ == AccessibilityPanelState::FULLSCREEN) {
bounds = root_window->bounds();
} else if (panel_state_ == AccessibilityPanelState::FULL_WIDTH) {
bounds.set_x(0);
bounds.set_width(root_window->bounds().width());
}
// If a fullscreen browser window is open, give the panel a height of 0
// unless it's active or always_visible_ is true.
if (!always_visible_ && root_controller->GetWindowForFullscreenMode() &&
!wm::IsActiveWindow(panel_window_)) {
bounds.set_height(0);
panel_window_->SetBounds(bounds);
UpdateWorkAreaForPanelHeight();
return;
}
// Make sure the accessibility panel is always below the Docked Magnifier
// viewport so it shows up and gets magnified.
int magnifier_height =
root_controller->work_area_insets()->docked_magnifier_height();
if (bounds.y() < magnifier_height)
bounds.Offset(0, magnifier_height);
// Make sure the accessibility panel doesn't go offscreen when the Docked
// Magnifier is on.
int screen_height = root_window->bounds().height();
int available_height = screen_height - magnifier_height;
if (bounds.height() > available_height)
bounds.set_height(available_height);
panel_window_->SetBounds(bounds);
UpdateWorkAreaForPanelHeight();
}
void AccessibilityPanelLayoutManager::UpdateWorkAreaForPanelHeight() {
bool has_height =
panel_window_ && panel_state_ == AccessibilityPanelState::FULL_WIDTH;
const int height = has_height ? panel_window_->bounds().height() : 0;
WorkAreaInsets* const work_area_insets =
Shell::GetPrimaryRootWindowController()->work_area_insets();
if (work_area_insets->accessibility_panel_height() != height)
work_area_insets->SetAccessibilityPanelHeight(height);
}
} // namespace ash
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