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// Copyright 2015 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 <cstdint>
#include <memory>
#include <string>
#include "ash/display/window_tree_host_manager.h"
#include "ash/public/interfaces/window_state_type.mojom.h"
#include "base/macros.h"
#include "base/optional.h"
#include "base/strings/string16.h"
#include "components/exo/surface_observer.h"
#include "components/exo/surface_tree_host.h"
#include "ui/accessibility/ax_tree_id.h"
#include "ui/aura/client/capture_client_observer.h"
#include "ui/aura/window_observer.h"
#include "ui/base/hit_test.h"
#include "ui/display/display_observer.h"
#include "ui/display/types/display_constants.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/views/widget/widget_delegate.h"
#include "ui/wm/public/activation_change_observer.h"
namespace ash {
namespace wm {
class WindowState;
namespace base {
namespace trace_event {
class TracedValue;
} // namespace base
namespace exo {
class Surface;
// This class provides functions for treating a surfaces like toplevel,
// fullscreen or popup widgets, move, resize or maximize them, associate
// metadata like title and class, etc.
class ShellSurfaceBase : public SurfaceTreeHost,
public SurfaceObserver,
public aura::WindowObserver,
public aura::client::CaptureClientObserver,
public views::WidgetDelegate,
public views::View,
public wm::ActivationChangeObserver {
// The |origin| is the initial position in screen coordinates. The position
// specified as part of the geometry is relative to the shell surface.
ShellSurfaceBase(Surface* surface,
const gfx::Point& origin,
bool activatable,
bool can_minimize,
int container);
~ShellSurfaceBase() override;
// Set the callback to run when the user wants the shell surface to be closed.
// The receiver can chose to not close the window on this signal.
void set_close_callback(const base::RepeatingClosure& close_callback) {
close_callback_ = close_callback;
// Set the callback to run when the surface is destroyed.
void set_surface_destroyed_callback(
base::OnceClosure surface_destroyed_callback) {
surface_destroyed_callback_ = std::move(surface_destroyed_callback);
// Activates the shell surface.
void Activate();
// Set title for the surface.
void SetTitle(const base::string16& title);
// Set icon for the surface.
void SetIcon(const gfx::ImageSkia& icon);
// Sets the system modality.
void SetSystemModal(bool system_modal);
// Set the application ID for the surface.
void SetApplicationId(const char* application_id);
// Set the startup ID for the surface.
void SetStartupId(const char* startup_id);
// Set the child ax tree ID for the surface.
void SetChildAxTreeId(ui::AXTreeID child_ax_tree_id);
// Signal a request to close the window. It is up to the implementation to
// actually decide to do so though.
void Close();
// Set geometry for surface. The geometry represents the "visible bounds"
// for the surface from the user's perspective.
void SetGeometry(const gfx::Rect& geometry);
// If set, geometry is in display rather than window or screen coordinates.
void SetDisplay(int64_t display_id);
// Set origin in screen coordinate space.
void SetOrigin(const gfx::Point& origin);
// Set activatable state for surface.
void SetActivatable(bool activatable);
// Set container for surface.
void SetContainer(int container);
// Set the maximum size for the surface.
void SetMaximumSize(const gfx::Size& size);
// Set the miniumum size for the surface.
void SetMinimumSize(const gfx::Size& size);
// Set the aspect ratio for the surface.
void SetAspectRatio(const gfx::SizeF& aspect_ratio);
// Set the flag if the surface can maximize or not.
void SetCanMinimize(bool can_minimize);
// Prevents shell surface from being moved.
void DisableMovement();
// Returns a trace value representing the state of the surface.
std::unique_ptr<base::trace_event::TracedValue> AsTracedValue() const;
// Overridden from SurfaceDelegate:
void OnSurfaceCommit() override;
bool IsInputEnabled(Surface* surface) const override;
void OnSetFrame(SurfaceFrameType type) override;
void OnSetFrameColors(SkColor active_color, SkColor inactive_color) override;
void OnSetStartupId(const char* startup_id) override;
void OnSetApplicationId(const char* application_id) override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
// Overridden from CaptureClientObserver:
void OnCaptureChanged(aura::Window* lost_capture,
aura::Window* gained_capture) override;
// Overridden from views::WidgetDelegate:
bool CanResize() const override;
bool CanMaximize() const override;
bool CanMinimize() const override;
base::string16 GetWindowTitle() const override;
bool ShouldShowWindowTitle() const override;
gfx::ImageSkia GetWindowIcon() override;
bool OnCloseRequested(views::Widget::ClosedReason close_reason) override;
void WindowClosing() override;
views::Widget* GetWidget() override;
const views::Widget* GetWidget() const override;
views::View* GetContentsView() override;
views::NonClientFrameView* CreateNonClientFrameView(
views::Widget* widget) override;
bool WidgetHasHitTestMask() const override;
void GetWidgetHitTestMask(SkPath* mask) const override;
// Overridden from views::View:
gfx::Size CalculatePreferredSize() const override;
gfx::Size GetMinimumSize() const override;
gfx::Size GetMaximumSize() const override;
void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
// Overridden from aura::WindowObserver:
void OnWindowDestroying(aura::Window* window) override;
// Overridden from wm::ActivationChangeObserver:
void OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) override;
// Overridden from ui::AcceleratorTarget:
bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
bool frame_enabled() const {
return frame_type_ != SurfaceFrameType::NONE &&
frame_type_ != SurfaceFrameType::SHADOW;
Surface* surface_for_testing() { return root_surface(); }
// Creates the |widget_| for |surface_|. |show_state| is the initial state
// of the widget (e.g. maximized).
void CreateShellSurfaceWidget(ui::WindowShowState show_state);
// Returns true if surface is currently being resized.
bool IsResizing() const;
// Updates the bounds of widget to match the current surface bounds.
void UpdateWidgetBounds();
// Called by UpdateWidgetBounds to set widget bounds.
virtual void SetWidgetBounds(const gfx::Rect& bounds) = 0;
// Updates the bounds of surface to match the current widget bounds.
void UpdateSurfaceBounds();
// Creates, deletes and update the shadow bounds based on
// |shadow_bounds_|.
void UpdateShadow();
// Applies |system_modal_| to |widget_|.
void UpdateSystemModal();
// Returns the "visible bounds" for the surface from the user's perspective.
gfx::Rect GetVisibleBounds() const;
// Returns the bounds of the client area.nnn
gfx::Rect GetClientViewBounds() const;
// In the local coordinate system of the window.
virtual gfx::Rect GetShadowBounds() const;
// Set the parent window of this surface.
void SetParentWindow(aura::Window* parent);
// Start the event capture on this surface.
void StartCapture();
const gfx::Rect& geometry() const { return geometry_; }
// Install custom window targeter. Used to restore window targeter.
void InstallCustomWindowTargeter();
views::Widget* widget_ = nullptr;
aura::Window* parent_ = nullptr;
bool movement_disabled_ = false;
gfx::Point origin_;
// Container Window Id (see ash/public/cpp/shell_window_ids.h)
int container_;
gfx::Rect geometry_;
gfx::Rect pending_geometry_;
int64_t display_id_ = display::kInvalidDisplayId;
int64_t pending_display_id_ = display::kInvalidDisplayId;
base::Optional<gfx::Rect> shadow_bounds_;
bool shadow_bounds_changed_ = false;
base::string16 title_;
// TODO(oshima): Remove this once the transition to new drag/resize
// complete.
bool client_controlled_move_resize_ = true;
SurfaceFrameType frame_type_ = SurfaceFrameType::NONE;
bool is_popup_ = false;
bool has_grab_ = false;
// Called on widget creation to initialize its window state.
// TODO(reveman): Remove virtual functions below to avoid FBC problem.
virtual void InitializeWindowState(ash::wm::WindowState* window_state) = 0;
// Returns the scale of the surface tree relative to the shell surface.
virtual float GetScale() const;
// Return the bounds of the widget/origin of surface taking visible
// bounds and current resize direction into account.
virtual base::Optional<gfx::Rect> GetWidgetBounds() const = 0;
virtual gfx::Point GetSurfaceOrigin() const = 0;
// Commit is deferred if this returns false.
virtual bool OnPreWidgetCommit() = 0;
virtual void OnPostWidgetCommit() = 0;
void CommitWidget();
bool activatable_ = true;
bool can_minimize_ = true;
bool has_frame_colors_ = false;
SkColor active_frame_color_ = SK_ColorBLACK;
SkColor inactive_frame_color_ = SK_ColorBLACK;
bool pending_show_widget_ = false;
base::Optional<std::string> application_id_;
base::Optional<std::string> startup_id_;
base::RepeatingClosure close_callback_;
base::OnceClosure surface_destroyed_callback_;
bool system_modal_ = false;
bool non_system_modal_window_was_active_ = false;
gfx::ImageSkia icon_;
gfx::Size minimum_size_;
gfx::Size pending_minimum_size_;
gfx::Size maximum_size_;
gfx::Size pending_maximum_size_;
gfx::SizeF pending_aspect_ratio_;
ui::AXTreeID child_ax_tree_id_ = ui::AXTreeIDUnknown();
} // namespace exo