| // Copyright 2016 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_AURA_WINDOW_PORT_H_ |
| #define UI_AURA_WINDOW_PORT_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/observer_list.h" |
| #include "base/strings/string16.h" |
| #include "ui/aura/aura_export.h" |
| #include "ui/base/class_property.h" |
| |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace aura { |
| |
| class Window; |
| class WindowObserver; |
| |
| // WindowPort defines an interface to enable Window to be used with or without |
| // mus. WindowPort is owned by Window and called at key points in Windows |
| // lifetime that enable Window to be used in both environments. |
| // |
| // If a Window is created without an explicit WindowPort then |
| // Env::CreateWindowPort() is used to create the WindowPort. |
| class AURA_EXPORT WindowPort { |
| public: |
| virtual ~WindowPort() {} |
| |
| // Called from Window::Init(). |
| virtual void OnPreInit(Window* window) = 0; |
| |
| virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0; |
| |
| // Called when a window is being added as a child. |child| may already have |
| // a parent, but its parent is not the Window this WindowPort is associated |
| // with. |
| virtual void OnWillAddChild(Window* child) = 0; |
| |
| virtual void OnWillRemoveChild(Window* child) = 0; |
| |
| // Called to move the child at |current_index| to |dest_index|. |dest_index| |
| // is calculated assuming the window at |current_index| has been removed, e.g. |
| // Window* child = children_[current_index]; |
| // children_.erase(children_.begin() + current_index); |
| // children_.insert(children_.begin() + dest_index, child); |
| virtual void OnWillMoveChild(size_t current_index, size_t dest_index) = 0; |
| |
| virtual void OnVisibilityChanged(bool visible) = 0; |
| |
| virtual void OnDidChangeBounds(const gfx::Rect& old_bounds, |
| const gfx::Rect& new_bounds) = 0; |
| |
| // Called before a property is changed. The return value from this is supplied |
| // into OnPropertyChanged() so that WindowPort may pass data between the two |
| // calls. |
| virtual std::unique_ptr<ui::PropertyData> OnWillChangeProperty( |
| const void* key) = 0; |
| |
| // Called after a property changes, but before observers are notified. |data| |
| // is the return value from OnWillChangeProperty(). |
| virtual void OnPropertyChanged( |
| const void* key, |
| std::unique_ptr<ui::PropertyData> data) = 0; |
| |
| protected: |
| // Returns the WindowPort associated with a Window. |
| static WindowPort* Get(Window* window); |
| |
| // Returns the ObserverList of a Window. |
| static base::ObserverList<WindowObserver, true>* GetObservers(Window* window); |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_WINDOW_PORT_H_ |