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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/system/accessibility/switch_access/switch_access_back_button_bubble_controller.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/shell.h"
#include "ash/system/accessibility/switch_access/switch_access_back_button_view.h"
#include "ash/system/tray/tray_background_view.h"
#include "ash/system/tray/tray_constants.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/compositor/layer.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
namespace ash {
SwitchAccessBackButtonBubbleController::
SwitchAccessBackButtonBubbleController() {}
SwitchAccessBackButtonBubbleController::
~SwitchAccessBackButtonBubbleController() {
if (widget_ && !widget_->IsClosed())
widget_->CloseNow();
}
void SwitchAccessBackButtonBubbleController::ShowBackButton(
const gfx::Rect& anchor,
bool show_focus_ring,
bool for_menu) {
for_menu_ = for_menu;
if (!widget_) {
back_button_view_ = new SwitchAccessBackButtonView(for_menu);
TrayBubbleView::InitParams init_params;
init_params.delegate = GetWeakPtr();
// Anchor within the overlay container.
init_params.parent_window =
Shell::GetContainer(Shell::GetPrimaryRootWindow(),
kShellWindowId_AccessibilityBubbleContainer);
init_params.anchor_mode = TrayBubbleView::AnchorMode::kRect;
init_params.is_anchored_to_status_area = false;
init_params.preferred_width = back_button_view_->size().width();
init_params.translucent = true;
init_params.type = TrayBubbleView::TrayBubbleType::kAccessibilityBubble;
bubble_view_ = new TrayBubbleView(init_params);
bubble_view_->SetArrow(views::BubbleBorder::BOTTOM_RIGHT);
bubble_view_->AddChildViewRaw(back_button_view_.get());
// Only call `SetPaintToLayer()` when necessary since a layer could have
// been created for `ViewShadow` and re-creating here breaks the z-order set
// by `ViewShadow`.
if (!bubble_view_->layer())
bubble_view_->SetPaintToLayer();
bubble_view_->layer()->SetFillsBoundsOpaquely(false);
widget_ = views::BubbleDialogDelegateView::CreateBubble(bubble_view_);
TrayBackgroundView::InitializeBubbleAnimations(widget_);
bubble_view_->InitializeAndShowBubble();
} else {
back_button_view_->SetForMenu(for_menu);
}
DCHECK(bubble_view_);
back_button_view_->SetFocusRing(show_focus_ring);
bubble_view_->ChangeAnchorRect(AdjustAnchorRect(anchor));
widget_->Show();
bubble_view_->NotifyAccessibilityEventDeprecated(
ax::mojom::Event::kChildrenChanged, true);
}
void SwitchAccessBackButtonBubbleController::HideFocusRing() {
back_button_view_->SetFocusRing(false);
}
void SwitchAccessBackButtonBubbleController::Hide() {
if (widget_)
widget_->Hide();
if (bubble_view_)
bubble_view_->NotifyAccessibilityEventDeprecated(
ax::mojom::Event::kChildrenChanged, true);
}
void SwitchAccessBackButtonBubbleController::BubbleViewDestroyed() {
back_button_view_ = nullptr;
bubble_view_ = nullptr;
widget_ = nullptr;
}
void SwitchAccessBackButtonBubbleController::HideBubble(
const TrayBubbleView* bubble_view) {
// This function is currently not unused for bubbles of type
// `kAccessibilityBubble`, so can leave this empty.
}
// The back button should display to the right of the anchor rect provided.
// Because the TrayBubbleView defaults to showing the right edges lining up
// (rather than the top edges lining up) we'll add the width of the button to
// the anchor rect's width, and the height of the button to the y-coordinate.
gfx::Rect SwitchAccessBackButtonBubbleController::AdjustAnchorRect(
const gfx::Rect& anchor) {
DCHECK(back_button_view_);
gfx::Size button_size = back_button_view_->size();
gfx::Rect adjusted_anchor(anchor);
// The bubble aligns its right edge with the rect's right edge, so add the
// button width to have them adjacent only at the corner.
int width = adjusted_anchor.width() + button_size.width();
if (!for_menu_)
width += kFocusRingPaddingDp;
adjusted_anchor.set_width(width);
// To align the top edges, move the button down by its height.
int offset_height = button_size.height();
if (for_menu_)
offset_height -= back_button_view_->GetFocusRingWidthPerSide();
else
offset_height -= kFocusRingPaddingDp;
adjusted_anchor.Offset(0, offset_height);
gfx::Rect display_bounds =
display::Screen::GetScreen()->GetDisplayMatching(anchor).bounds();
// Ensure that the back button displays onscreen.
display_bounds.Inset(gfx::Insets::TLBR(button_size.height(), 0, 0, 0));
if (adjusted_anchor.Intersects(display_bounds)) {
adjusted_anchor.Intersect(display_bounds);
} else {
// When the supplied anchor is entirely within our padding around the edges,
// construct an anchor at the appropriate position.
int x = adjusted_anchor.right();
int y = adjusted_anchor.y();
if (x < display_bounds.x()) {
x = display_bounds.x();
} else if (x > display_bounds.right()) {
x = display_bounds.right();
}
if (y < display_bounds.y()) {
y = display_bounds.y();
} else if (y > display_bounds.bottom()) {
y = display_bounds.bottom();
}
adjusted_anchor = gfx::Rect(x, y, 0, 0);
}
return adjusted_anchor;
}
} // namespace ash
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