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- // Copyright (c) 2012 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.
- #ifndef ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_
- #define ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_
- #include <stdint.h>
- #include <memory>
- #include <vector>
- #include "ash/wm/window_resizer.h"
- #include "ash/wm/workspace/magnetism_matcher.h"
- #include "base/memory/weak_ptr.h"
- #include "base/timer/timer.h"
- #include "ui/aura/window_tracker.h"
- #include "ui/compositor/presentation_time_recorder.h"
- #include "ui/display/display.h"
- #include "ui/gfx/geometry/point_f.h"
- namespace ash {
- class PhantomWindowController;
- class WindowSize;
- class WindowState;
- // WindowResizer implementation for workspaces. This enforces that windows are
- // not allowed to vertically move or resize outside of the work area. As windows
- // are moved outside the work area they are shrunk. We remember the height of
- // the window before it was moved so that if the window is again moved up we
- // attempt to restore the old height.
- class ASH_EXPORT WorkspaceWindowResizer : public WindowResizer {
- public:
- // Possible states the window can end up in after a drag is complete.
- enum class SnapType { kPrimary, kSecondary, kMaximize, kNone };
- // Min height we'll force on screen when dragging the caption.
- // TODO: this should come from a property on the window.
- static constexpr int kMinOnscreenHeight = 32;
- ~WorkspaceWindowResizer() override;
- static std::unique_ptr<WorkspaceWindowResizer> Create(
- WindowState* window_state,
- const std::vector<aura::Window*>& attached_windows);
- // WindowResizer:
- void Drag(const gfx::PointF& location_in_parent, int event_flags) override;
- void CompleteDrag() override;
- void RevertDrag() override;
- void FlingOrSwipe(ui::GestureEvent* event) override;
- private:
- friend class WorkspaceWindowResizerTest;
- FRIEND_TEST_ALL_PREFIXES(HapticsUtilTest, HapticFeedbackForNormalWindowSnap);
- WorkspaceWindowResizer(WindowState* window_state,
- const std::vector<aura::Window*>& attached_windows);
- WorkspaceWindowResizer(const WorkspaceWindowResizer&) = delete;
- WorkspaceWindowResizer& operator=(const WorkspaceWindowResizer&) = delete;
- // Lays out the attached windows. |bounds| is the bounds of the main window.
- void LayoutAttachedWindows(gfx::Rect* bounds);
- // Calculates the new sizes of the attached windows, given that the main
- // window has been resized (along the primary axis) by |delta|.
- // |available_size| is the maximum length of the space that the attached
- // windows are allowed to occupy (ie: the distance between the right/bottom
- // edge of the primary window and the right/bottom of the desktop area).
- // Populates |sizes| with the desired sizes of the attached windows, and
- // returns the number of pixels that couldn't be allocated to the attached
- // windows (due to min/max size constraints).
- // Note the return value can be positive or negative, a negative value
- // indicating that that many pixels couldn't be removed from the attached
- // windows.
- int CalculateAttachedSizes(int delta,
- int available_size,
- std::vector<int>* sizes) const;
- // Divides |amount| evenly between |sizes|. If |amount| is negative it
- // indicates how many pixels |sizes| should be shrunk by.
- // Returns how many pixels failed to be allocated/removed from |sizes|.
- int GrowFairly(int amount, std::vector<WindowSize>* sizes) const;
- // Calculate the ratio of pixels that each WindowSize in |sizes| should
- // receive when growing or shrinking.
- void CalculateGrowthRatios(const std::vector<WindowSize*>& sizes,
- std::vector<float>* out_ratios) const;
- // Adds a WindowSize to |sizes| for each attached window.
- void CreateBucketsForAttached(std::vector<WindowSize>* sizes) const;
- // If possible snaps the window to a neary window in |display|. Updates
- // |bounds| if there was a close enough window. |display| should be the
- // display containing the last event location.
- void MagneticallySnapToOtherWindows(const display::Display& display,
- gfx::Rect* bounds);
- // If possible snaps the resize to a neary window in |display|. Updates
- // |bounds| if there was a close enough window. |display| should be the
- // display containing the last event location.
- void MagneticallySnapResizeToOtherWindows(const display::Display& display,
- gfx::Rect* bounds);
- // Finds the neareset window in |display| to magentically snap to. Updates
- // |magnetism_window_| and |magnetism_edge_| appropriately. |edges| is a
- // bitmask of the MagnetismEdges to match again. Returns true if a match is
- // found.
- bool UpdateMagnetismWindow(const display::Display& display,
- const gfx::Rect& bounds,
- uint32_t edges);
- // Adjusts the bounds of the window: magnetically snapping, ensuring the
- // window has enough on screen... |snap_size| is the distance from an edge of
- // the work area before the window is snapped. A value of 0 results in no
- // snapping.
- void AdjustBoundsForMainWindow(int snap_size, gfx::Rect* bounds);
- // Stick the window bounds to the work area during a move.
- bool StickToWorkAreaOnMove(const gfx::Rect& work_area,
- int sticky_size,
- gfx::Rect* bounds) const;
- // Stick the window bounds to the work area during a resize.
- void StickToWorkAreaOnResize(const gfx::Rect& work_area,
- int sticky_size,
- gfx::Rect* bounds) const;
- // Returns a coordinate along the primary axis. Used to share code for
- // left/right multi window resize and top/bottom resize.
- int PrimaryAxisSize(const gfx::Size& size) const;
- int PrimaryAxisCoordinate(int x, int y) const;
- // From a given snap |type| and a current display orientation, returns true
- // if the snap is snap top or maximize. This function is used to decide if
- // we need to show the phantom window for top snap or maximize or not.
- bool IsSnapTopOrMaximize(SnapType type) const;
- // Updates the bounds of the phantom window where the snap bounds are
- // calculated from GetSnappedWindowBounds() given a |target_snap_type| and
- // maximize bounds is from full display work area.
- void UpdateSnapPhantomWindow(const SnapType target_snap_type);
- // Restacks the windows z-order position so that one of the windows is at the
- // top of the z-order, and the rest directly underneath it.
- void RestackWindows();
- // Returns the edge to which the window should be snapped to if the user does
- // no more dragging. kSnapNone is returned if the window should not be
- // snapped, whether it has not been dragged to the correct region, or the
- // window does not allow for snapping.
- SnapType GetSnapType(const display::Display& display,
- const gfx::PointF& location_in_screen) const;
- // Returns true if |window| bounds are valid bounds for a snap state and snap
- // ratio in |window_state_|.
- bool AreBoundsValidSnappedBounds(aura::Window* window) const;
- // Sets |window|'s state type to |new_state_type|. Called after the drag has
- // been completed for fling/swipe gestures.
- void SetWindowStateTypeFromGesture(aura::Window* window,
- chromeos::WindowStateType new_state_type);
- // Start/End drag for attached windows if there is any.
- void StartDragForAttachedWindows();
- void EndDragForAttachedWindows(bool revert_drag);
- // Gets the display associated with GetTarget() if touch dragging. Gets the
- // display associated with the cursor if mouse dragging.
- display::Display GetDisplay() const;
- WindowState* window_state() { return window_state_; }
- const WindowState* window_state() const { return window_state_; }
- // Returns the currently used instance for test.
- static WorkspaceWindowResizer* GetInstanceForTest();
- const std::vector<aura::Window*> attached_windows_;
- bool did_lock_cursor_ = false;
- // Set to true once Drag() is invoked and the bounds of the window change.
- bool did_move_or_resize_ = false;
- // Tracks whether a window can be maximized depending on distance dragged.
- // Set to true when Drag() has a vertical move more than
- // kSnapTriggerVerticalMoveThreshold.
- bool can_snap_to_maximize_ = false;
- // True if the window initially had |bounds_changed_by_user_| set in state.
- const bool initial_bounds_changed_by_user_;
- // The initial size of each of the windows in |attached_windows_| along the
- // primary axis.
- std::vector<int> initial_size_;
- // Sum of the minimum sizes of the attached windows.
- int total_min_ = 0;
- // Sum of the sizes in |initial_size_|.
- int total_initial_size_ = 0;
- // Gives a previews of where the the window will end up. Only used if there
- // is a grid and the caption is being dragged.
- std::unique_ptr<PhantomWindowController> snap_phantom_window_controller_;
- // The edge to which the window should be snapped to at the end of the drag.
- SnapType snap_type_ = SnapType::kNone;
- // Timer for dwell time countdown.
- base::OneShotTimer dwell_countdown_timer_;
- // The location for drag maximize in screen.
- absl::optional<gfx::PointF> dwell_location_in_screen_;
- // The location in parent passed to `Drag()`.
- gfx::PointF last_location_in_parent_;
- // Window the drag has magnetically attached to.
- aura::Window* magnetism_window_ = nullptr;
- // Used to verify |magnetism_window_| is still valid.
- aura::WindowTracker window_tracker_;
- // If |magnetism_window_| is non-NULL this indicates how the two windows
- // should attach.
- MatchedEdge magnetism_edge_;
- // The window bounds when the drag was started. When a window is minimized,
- // maximized or snapped via a swipe/fling gesture, the restore bounds should
- // be set to the bounds of the window when the drag was started. If the window
- // started with restore bounds (snapped/maximized), those will be used
- // instead.
- gfx::Rect restore_bounds_for_gesture_;
- // Presentation time recorder for tab dragging in clamshell mode.
- std::unique_ptr<ui::PresentationTimeRecorder> tab_dragging_recorder_;
- // Used to determine if this has been deleted during a drag such as when a tab
- // gets dragged into another browser window.
- base::WeakPtrFactory<WorkspaceWindowResizer> weak_ptr_factory_{this};
- };
- } // namespace ash
- #endif // ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_
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