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// Copyright 2017 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 UI_KEYBOARD_CONTAINER_BEHAVIOR_H_
#define UI_KEYBOARD_CONTAINER_BEHAVIOR_H_
#include "ui/aura/window.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/events/event.h"
#include "ui/keyboard/container_type.h"
#include "ui/keyboard/keyboard_export.h"
#include "ui/wm/core/window_animations.h"
namespace keyboard {
// Represents and encapsulates how the keyboard container should visually behave
// within the workspace window.
class KEYBOARD_EXPORT ContainerBehavior {
public:
virtual ~ContainerBehavior() {}
// Apply changes to the animation settings to animate the keyboard container
// showing.
virtual void DoShowingAnimation(
aura::Window* window,
ui::ScopedLayerAnimationSettings* animation_settings) = 0;
// Apply changes to the animation settings to animate the keyboard container
// hiding.
virtual void DoHidingAnimation(
aura::Window* window,
::wm::ScopedHidingAnimationSettings* animation_settings) = 0;
// Initialize the starting state of the keyboard container for the showing
// animation.
virtual void InitializeShowAnimationStartingState(
aura::Window* container) = 0;
// Used by the layout manager to intercept any bounds setting request to
// adjust the request to different bounds, if necessary. This method gets
// called at any time during the keyboard's life cycle. The bounds are in
// global screen coordinates.
virtual gfx::Rect AdjustSetBoundsRequest(
const gfx::Rect& display_bounds,
const gfx::Rect& requested_bounds_in_screen_coords) = 0;
// Used to set the bounds to the default location. This is generally called
// during initialization, but may also be have identical behavior to
// AdjustSetBoundsRequest in the case of constant layouts such as the fixed
// full-width keyboard.
virtual void SetCanonicalBounds(aura::Window* container,
const gfx::Rect& display_bounds) = 0;
// A ContainerBehavior can choose to not allow overscroll to be used. It is
// important to note that the word "Allowed" is used because whether or not
// overscroll is "enabled" depends on multiple external factors.
virtual bool IsOverscrollAllowed() const = 0;
// Return whether the given coordinate is a drag handle.
virtual bool IsDragHandle(const gfx::Vector2d& offset,
const gfx::Size& keyboard_size) const = 0;
virtual void SavePosition(const gfx::Rect& keyboard_bounds_in_screen,
const gfx::Size& screen_size) = 0;
virtual bool HandlePointerEvent(const ui::LocatedEvent& event,
const display::Display& current_display) = 0;
virtual ContainerType GetType() const = 0;
// Removing focus from a text field should cause the keyboard to be dismissed.
virtual bool TextBlurHidesKeyboard() const = 0;
// Sets a region of the keyboard window that is occluded by the keyboard.
// This is called by the IME extension code. By default, this call is ignored.
// Container behaviors that listen for this call should override this method.
virtual void SetOccludedBounds(const gfx::Rect& occluded_bounds_in_window) {}
// Gets the region of the keyboard window that is occluded by the keyboard, or
// an empty rectangle if nothing is occluded. The occluded region is
// considered to be 'unusable', so the window manager or other system UI
// should respond to the occluded bounds (e.g. by moving windows out of the
// occluded region).
//
// The occluded bounds must be completely contained in the visual bounds.
virtual gfx::Rect GetOccludedBounds(
const gfx::Rect& visual_bounds_in_window) const = 0;
// Any region of the screen that is occluded by the keyboard should cause the
// workspace to change its layout.
virtual bool OccludedBoundsAffectWorkspaceLayout() const = 0;
// Sets floating keyboard drggable rect.
virtual bool SetDraggableArea(const gfx::Rect& rect) = 0;
protected:
// The opacity of virtual keyboard container when show animation
// starts or hide animation finishes. This cannot be zero because we
// call Show() on the keyboard window before setting the opacity
// back to 1.0. Since windows are not allowed to be shown with zero
// opacity, we always animate to 0.01 instead.
static constexpr float kAnimationStartOrAfterHideOpacity = 0.01f;
};
} // namespace keyboard
#endif // UI_KEYBOARD_CONTAINER_BEHAVIOR_H_
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