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// Copyright 2018 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_PIP_PIP_POSITIONER_H_
#define ASH_WM_PIP_PIP_POSITIONER_H_
#include <vector>
#include "ash/ash_export.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "ui/display/display.h"
#include "ui/gfx/geometry/rect.h"
namespace ash {
namespace wm {
class WindowState;
} // namespace wm
class PipPositionerTest;
class ASH_EXPORT PipPositioner {
public:
static const int kPipDismissTimeMs = 300;
PipPositioner() = delete;
~PipPositioner() = delete;
// Returns the area that the PIP window can be positioned inside for a given
// display |display|.
static gfx::Rect GetMovementArea(const display::Display& display);
// Returns the position the PIP window should come to rest at. For example,
// this will be at a screen edge, not in the middle of the screen.
// TODO(edcourtney): This should consider drag velocity for fling as well.
static gfx::Rect GetRestingPosition(const display::Display& display,
const gfx::Rect& bounds);
// Adjusts bounds during a drag of a PIP window. For example, this will
// ensure that the PIP window cannot leave the PIP movement area.
// |bounds| is in screen coordinates.
static gfx::Rect GetBoundsForDrag(const display::Display& display,
const gfx::Rect& bounds);
// Based on the current PIP window position, finds a final location of where
// the PIP window should be animated to to show a dismissal off the side
// of the screen. Note that this may return somewhere not off-screen if
// animating the PIP window off-screen would travel too far.
static gfx::Rect GetDismissedPosition(const display::Display& display,
const gfx::Rect& bounds);
// Gets the position the PIP window should be moved to after a movement area
// change. For example, if the shelf is changed from auto-hidden to always
// shown, the PIP window should move up to not intersect it.
static gfx::Rect GetPositionAfterMovementAreaChange(
wm::WindowState* window_state);
private:
friend class PipPositionerTest;
// Moves |bounds| such that it does not intersect with system ui areas, such
// as the unified system tray or the floating keyboard.
static gfx::Rect AvoidObstacles(const display::Display& display,
const gfx::Rect& bounds);
// Internal method for collision resolution. Returns a gfx::Rect with the
// same size as |bounds|. That rectangle will not intersect any of the
// rectangles in |rects| and will be completely inside |work_area|. If such a
// rectangle does not exist, returns |bounds|. Otherwise, it will be the
// closest such rectangle to |bounds|.
static gfx::Rect AvoidObstaclesInternal(const gfx::Rect& work_area,
const std::vector<gfx::Rect>& rects,
const gfx::Rect& bounds);
DISALLOW_COPY_AND_ASSIGN(PipPositioner);
};
} // namespace ash
#endif // ASH_WM_PIP_PIP_POSITIONER_H_