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ash / wm / desks / desk_preview_view.h [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_WM_DESKS_DESK_PREVIEW_VIEW_H_
#define ASH_WM_DESKS_DESK_PREVIEW_VIEW_H_
#include <memory>
#include <optional>
#include "ash/ash_export.h"
#include "ash/style/system_shadow.h"
#include "ash/wm/desks/window_occlusion_calculator.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "ui/aura/window_occlusion_tracker.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/controls/button/button.h"
namespace ui {
class LayerTreeOwner;
} // namespace ui
namespace ash {
class DeskMiniView;
class WallpaperBaseView;
// A view that shows the contents of the corresponding desk in its mini_view.
// This view has the following layer hierarchy:
//
// +---------------------------+
// | <-------------+------ This view's layer.
// +---------------------------+
// | \ ----->>>>> Higher in Z-order.
// | \
// +-----+ +-----+
// | | | |
// +-----+ +-----+
// ^ \ ^
// | \ +-----+ |
// | | | |
// | +-----+ |
// | ^ |
// | | `highlight_overlay_`'s layer:
// | | A solid color layer that is
// | | visible when `mini_view_`'s
// | | `DeskActionContextMenu` is open.
// | |
// | |
// | The root layer of the desk's mirrored
// | contents layer tree. This tree is owned by
// | `desk_mirrored_contents_layer_tree_owner_`.
// |
// |
// `desk_mirrored_contents_view_`'s layer: Will be the
// parent layer of the desk's contents mirrored layer tree.
//
// Note that `desk_mirrored_contents_view_` and `highlight_overlay_` paint to
// layers with rounded corners. In order to use the fast rounded corners
// implementation we must make them sibling layers, rather than one being a
// descendant of the other. Otherwise, this will trigger a render surface.
class ASH_EXPORT DeskPreviewView : public views::Button,
public WindowOcclusionCalculator::Observer {
METADATA_HEADER(DeskPreviewView, views::Button)
public:
DeskPreviewView(
PressedCallback callback,
DeskMiniView* mini_view,
base::WeakPtr<WindowOcclusionCalculator> window_occlusion_calculator);
DeskPreviewView(const DeskPreviewView&) = delete;
DeskPreviewView& operator=(const DeskPreviewView&) = delete;
~DeskPreviewView() override;
static constexpr SystemShadow::Type kDefaultShadowType =
SystemShadow::Type::kElevation4;
static constexpr SystemShadow::Type kDraggedShadowType =
SystemShadow::Type::kElevation12;
// Returns the height of the DeskPreviewView, which is a function of the
// |root| window's height.
static int GetHeight(aura::Window* root);
SystemShadow* shadow() const { return shadow_.get(); }
std::optional<ui::ColorId> focus_color_id() { return focus_color_id_; }
void set_focus_color_id(std::optional<ui::ColorId> focus_color_id) {
focus_color_id_ = focus_color_id;
}
// Sets the visibility of `highlight_overlay_` to `visible`. If `visible` is
// true, this `DeskPreviewView` becomes highlighted.
void SetHighlightOverlayVisibility(bool visible);
// This should be called when there is a change in the desk contents so that
// we can recreate the mirrored layer tree.
void RecreateDeskContentsMirrorLayers();
// Performs close action for this preview. when `primary_action` is true, it's
// merge-desk action; otherwise it's close-all action.
void Close(bool primary_action);
// Performs swap action for this preview. When `right` is true, it swaps with
// its right preview; otherwise it swaps with its left preview.
void Swap(bool right);
// Updates accessible name for this desk preview.
void UpdateAccessibleName();
// Called when the user exits overview by using 3-finger vertical trackpad
// swipes.
void AcceptSelection();
// views::Button:
void Layout(PassKey) override;
bool OnMousePressed(const ui::MouseEvent& event) override;
bool OnMouseDragged(const ui::MouseEvent& event) override;
void OnMouseReleased(const ui::MouseEvent& event) override;
void OnGestureEvent(ui::GestureEvent* event) override;
void OnThemeChanged() override;
void OnFocus() override;
void OnBlur() override;
void AboutToRequestFocusFromTabTraversal(bool reverse) override;
bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
bool CanHandleAccelerators() const override;
// WindowOcclusionCalculator::Observer:
void OnWindowOcclusionChanged(aura::Window* window) override;
private:
friend class DesksTestApi;
const raw_ptr<DeskMiniView, LeakedDanglingUntriaged> mini_view_;
const base::WeakPtr<WindowOcclusionCalculator> window_occlusion_calculator_;
// A view that paints the wallpaper in the mini_view. It avoids the dimming
// and blur overview mode adds to the original wallpaper. Owned by the views
// hierarchy.
using DeskWallpaperPreview = WallpaperBaseView;
raw_ptr<DeskWallpaperPreview> wallpaper_preview_;
// A view whose layer will act as the parent of desk's mirrored contents layer
// tree. Owned by the views hierarchy.
raw_ptr<views::View> desk_mirrored_contents_view_;
// An overlay that becomes visible on top of the
// `desk_mirrored_contents_view_` when the `mini_view_`'s
// `DeskActionContextMenu` is active. Owned by the views hierarchy.
raw_ptr<views::View> highlight_overlay_ = nullptr;
// Owns the layer tree of the desk's contents mirrored layers.
std::unique_ptr<ui::LayerTreeOwner> desk_mirrored_contents_layer_tree_owner_;
// Forces the occlusion tracker to treat the associated desk's container
// window to be visible (even though in reality it may not be when the desk is
// inactive). This is needed since we may be mirroring the contents of an
// inactive desk which contains a playing video, which would not show at all
// in the mirrored contents if we didn't ask the occlusion tracker to consider
// the desk container to be visible. We need a separate scoped force on the
// floated window, if there is one, as it isn't parented to the desk
// container.
aura::WindowOcclusionTracker::ScopedForceVisible
force_desk_occlusion_tracker_visible_;
std::optional<aura::WindowOcclusionTracker::ScopedForceVisible>
force_float_occlusion_tracker_visible_;
std::unique_ptr<SystemShadow> shadow_;
std::optional<ui::ColorId> focus_color_id_;
base::WeakPtrFactory<DeskPreviewView> recreate_mirror_layers_weak_factory_{
this};
};
} // namespace ash
#endif // ASH_WM_DESKS_DESK_PREVIEW_VIEW_H_