include/input/InputWindow.h - platform/frameworks/native - Git at Google


            
            /*

            
             * Copyright (C) 2011 The Android Open Source Project

            
             *

            
             * Licensed under the Apache License, Version 2.0 (the "License");

            
             * you may not use this file except in compliance with the License.

            
             * You may obtain a copy of the License at

            
             *

            
             *      http://www.apache.org/licenses/LICENSE-2.0

            
             *

            
             * Unless required by applicable law or agreed to in writing, software

            
             * distributed under the License is distributed on an "AS IS" BASIS,

            
             * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

            
             * See the License for the specific language governing permissions and

            
             * limitations under the License.

            
             */


            #ifndef _UI_INPUT_WINDOW_H

            
            #define _UI_INPUT_WINDOW_H


            #include <android/os/TouchOcclusionMode.h>

            
            #include <binder/Parcel.h>

            
            #include <binder/Parcelable.h>

            
            #include <input/Flags.h>

            
            #include <input/Input.h>

            
            #include <input/InputTransport.h>

            
            #include <ui/Rect.h>

            
            #include <ui/Region.h>

            
            #include <ui/Transform.h>

            
            #include <utils/RefBase.h>

            
            #include <utils/Timers.h>


            #include "InputApplication.h"


            using android::os::TouchOcclusionMode;


            namespace android {


            /*

            
             * Describes the properties of a window that can receive input.

            
             */

            
            struct InputWindowInfo : public Parcelable {

            
                InputWindowInfo() = default;


                // Window flags from WindowManager.LayoutParams

            
                enum class Flag : uint32_t {

            
                    ALLOW_LOCK_WHILE_SCREEN_ON = 0x00000001,

            
                    DIM_BEHIND = 0x00000002,

            
                    BLUR_BEHIND = 0x00000004,

            
                    NOT_FOCUSABLE = 0x00000008,

            
                    NOT_TOUCHABLE = 0x00000010,

            
                    NOT_TOUCH_MODAL = 0x00000020,

            
                    TOUCHABLE_WHEN_WAKING = 0x00000040,

            
                    KEEP_SCREEN_ON = 0x00000080,

            
                    LAYOUT_IN_SCREEN = 0x00000100,

            
                    LAYOUT_NO_LIMITS = 0x00000200,

            
                    FULLSCREEN = 0x00000400,

            
                    FORCE_NOT_FULLSCREEN = 0x00000800,

            
                    DITHER = 0x00001000,

            
                    SECURE = 0x00002000,

            
                    SCALED = 0x00004000,

            
                    IGNORE_CHEEK_PRESSES = 0x00008000,

            
                    LAYOUT_INSET_DECOR = 0x00010000,

            
                    ALT_FOCUSABLE_IM = 0x00020000,

            
                    WATCH_OUTSIDE_TOUCH = 0x00040000,

            
                    SHOW_WHEN_LOCKED = 0x00080000,

            
                    SHOW_WALLPAPER = 0x00100000,

            
                    TURN_SCREEN_ON = 0x00200000,

            
                    DISMISS_KEYGUARD = 0x00400000,

            
                    SPLIT_TOUCH = 0x00800000,

            
                    HARDWARE_ACCELERATED = 0x01000000,

            
                    LAYOUT_IN_OVERSCAN = 0x02000000,

            
                    TRANSLUCENT_STATUS = 0x04000000,

            
                    TRANSLUCENT_NAVIGATION = 0x08000000,

            
                    LOCAL_FOCUS_MODE = 0x10000000,

            
                    SLIPPERY = 0x20000000,

            
                    LAYOUT_ATTACHED_IN_DECOR = 0x40000000,

            
                    DRAWS_SYSTEM_BAR_BACKGROUNDS = 0x80000000,

            
                }; // Window types from WindowManager.LayoutParams


                enum class Type : int32_t {

            
                    UNKNOWN = 0,

            
                    FIRST_APPLICATION_WINDOW = 1,

            
                    BASE_APPLICATION = 1,

            
                    APPLICATION = 2,

            
                    APPLICATION_STARTING = 3,

            
                    LAST_APPLICATION_WINDOW = 99,

            
                    FIRST_SUB_WINDOW = 1000,

            
                    APPLICATION_PANEL = FIRST_SUB_WINDOW,

            
                    APPLICATION_MEDIA = FIRST_SUB_WINDOW + 1,

            
                    APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW + 2,

            
                    APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW + 3,

            
                    APPLICATION_MEDIA_OVERLAY = FIRST_SUB_WINDOW + 4,

            
                    LAST_SUB_WINDOW = 1999,

            
                    FIRST_SYSTEM_WINDOW = 2000,

            
                    STATUS_BAR = FIRST_SYSTEM_WINDOW,

            
                    SEARCH_BAR = FIRST_SYSTEM_WINDOW + 1,

            
                    PHONE = FIRST_SYSTEM_WINDOW + 2,

            
                    SYSTEM_ALERT = FIRST_SYSTEM_WINDOW + 3,

            
                    KEYGUARD = FIRST_SYSTEM_WINDOW + 4,

            
                    TOAST = FIRST_SYSTEM_WINDOW + 5,

            
                    SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW + 6,

            
                    PRIORITY_PHONE = FIRST_SYSTEM_WINDOW + 7,

            
                    SYSTEM_DIALOG = FIRST_SYSTEM_WINDOW + 8,

            
                    KEYGUARD_DIALOG = FIRST_SYSTEM_WINDOW + 9,

            
                    SYSTEM_ERROR = FIRST_SYSTEM_WINDOW + 10,

            
                    INPUT_METHOD = FIRST_SYSTEM_WINDOW + 11,

            
                    INPUT_METHOD_DIALOG = FIRST_SYSTEM_WINDOW + 12,

            
                    WALLPAPER = FIRST_SYSTEM_WINDOW + 13,

            
                    STATUS_BAR_PANEL = FIRST_SYSTEM_WINDOW + 14,

            
                    SECURE_SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW + 15,

            
                    DRAG = FIRST_SYSTEM_WINDOW + 16,

            
                    STATUS_BAR_SUB_PANEL = FIRST_SYSTEM_WINDOW + 17,

            
                    POINTER = FIRST_SYSTEM_WINDOW + 18,

            
                    NAVIGATION_BAR = FIRST_SYSTEM_WINDOW + 19,

            
                    VOLUME_OVERLAY = FIRST_SYSTEM_WINDOW + 20,

            
                    BOOT_PROGRESS = FIRST_SYSTEM_WINDOW + 21,

            
                    INPUT_CONSUMER = FIRST_SYSTEM_WINDOW + 22,

            
                    NAVIGATION_BAR_PANEL = FIRST_SYSTEM_WINDOW + 24,

            
                    MAGNIFICATION_OVERLAY = FIRST_SYSTEM_WINDOW + 27,

            
                    ACCESSIBILITY_OVERLAY = FIRST_SYSTEM_WINDOW + 32,

            
                    DOCK_DIVIDER = FIRST_SYSTEM_WINDOW + 34,

            
                    ACCESSIBILITY_MAGNIFICATION_OVERLAY = FIRST_SYSTEM_WINDOW + 39,

            
                    NOTIFICATION_SHADE = FIRST_SYSTEM_WINDOW + 40,

            
                    LAST_SYSTEM_WINDOW = 2999,

            
                };


                enum class Feature {

            
                    DISABLE_TOUCH_PAD_GESTURES = 0x00000001,

            
                    NO_INPUT_CHANNEL = 0x00000002,

            
                    DISABLE_USER_ACTIVITY = 0x00000004,

            
                };


                /* These values are filled in by the WM and passed through SurfaceFlinger

            
                 * unless specified otherwise.

            
                 */

            
                // This value should NOT be used to uniquely identify the window. There may be different

            
                // input windows that have the same token.

            
                sp<IBinder> token;

            
                // This uniquely identifies the input window.

            
                int32_t id = -1;

            
                std::string name;

            
                Flags<Flag> flags;

            
                Type type = Type::UNKNOWN;

            
                std::chrono::nanoseconds dispatchingTimeout = std::chrono::seconds(5);


                /* These values are filled in by SurfaceFlinger. */

            
                int32_t frameLeft = -1;

            
                int32_t frameTop = -1;

            
                int32_t frameRight = -1;

            
                int32_t frameBottom = -1;


                /*

            
                 * SurfaceFlinger consumes this value to shrink the computed frame. This is

            
                 * different from shrinking the touchable region in that it DOES shift the coordinate

            
                 * space where-as the touchable region does not and is more like "cropping". This

            
                 * is used for window shadows.

            
                 */

            
                int32_t surfaceInset = 0;


                // A global scaling factor for all windows. Unlike windowScaleX/Y this results

            
                // in scaling of the TOUCH_MAJOR/TOUCH_MINOR axis.

            
                float globalScaleFactor = 1.0f;


                // The opacity of this window, from 0.0 to 1.0 (inclusive).

            
                // An alpha of 1.0 means fully opaque and 0.0 means fully transparent.

            
                float alpha;


                // Transform applied to individual windows.

            
                ui::Transform transform;


                // Display size in its natural rotation. Used to rotate raw coordinates for compatibility.

            
                int32_t displayWidth = AMOTION_EVENT_INVALID_DISPLAY_SIZE;

            
                int32_t displayHeight = AMOTION_EVENT_INVALID_DISPLAY_SIZE;


                /*

            
                 * This is filled in by the WM relative to the frame and then translated

            
                 * to absolute coordinates by SurfaceFlinger once the frame is computed.

            
                 */

            
                Region touchableRegion;

            
                bool visible = false;

            
                bool focusable = false;

            
                bool hasWallpaper = false;

            
                bool paused = false;

            
                /* This flag is set when the window is of a trusted type that is allowed to silently

            
                 * overlay other windows for the purpose of implementing the secure views feature.

            
                 * Trusted overlays, such as IME windows, can partly obscure other windows without causing

            
                 * motion events to be delivered to them with AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED.

            
                 */

            
                bool trustedOverlay = false;

            
                TouchOcclusionMode touchOcclusionMode = TouchOcclusionMode::BLOCK_UNTRUSTED;

            
                int32_t ownerPid = -1;

            
                int32_t ownerUid = -1;

            
                std::string packageName;

            
                Flags<Feature> inputFeatures;

            
                int32_t displayId = ADISPLAY_ID_NONE;

            
                int32_t portalToDisplayId = ADISPLAY_ID_NONE;

            
                InputApplicationInfo applicationInfo;

            
                bool replaceTouchableRegionWithCrop = false;

            
                wp<IBinder> touchableRegionCropHandle;


                void addTouchableRegion(const Rect& region);


                bool touchableRegionContainsPoint(int32_t x, int32_t y) const;


                bool frameContainsPoint(int32_t x, int32_t y) const;


                bool supportsSplitTouch() const;


                bool overlaps(const InputWindowInfo* other) const;


                bool operator==(const InputWindowInfo& inputChannel) const;


                status_t writeToParcel(android::Parcel* parcel) const override;


                status_t readFromParcel(const android::Parcel* parcel) override;

            
            };


            /*

            
             * Handle for a window that can receive input.

            
             *

            
             * Used by the native input dispatcher to indirectly refer to the window manager objects

            
             * that describe a window.

            
             */

            
            class InputWindowHandle : public RefBase {

            
            public:

            
                explicit InputWindowHandle();

            
                InputWindowHandle(const InputWindowHandle& other);

            
                InputWindowHandle(const InputWindowInfo& other);


                inline const InputWindowInfo* getInfo() const { return &mInfo; }


                sp<IBinder> getToken() const;


                int32_t getId() const { return mInfo.id; }


                sp<IBinder> getApplicationToken() { return mInfo.applicationInfo.token; }


                inline std::string getName() const { return !mInfo.name.empty() ? mInfo.name : "<invalid>"; }


                inline std::chrono::nanoseconds getDispatchingTimeout(

            
                        std::chrono::nanoseconds defaultValue) const {

            
                    return mInfo.token ? std::chrono::nanoseconds(mInfo.dispatchingTimeout) : defaultValue;

            
                }


                /**

            
                 * Requests that the state of this object be updated to reflect

            
                 * the most current available information about the application.

            
                 * As this class is created as RefBase object, no pure virtual function is allowed.

            
                 *

            
                 * This method should only be called from within the input dispatcher's

            
                 * critical section.

            
                 *

            
                 * Returns true on success, or false if the handle is no longer valid.

            
                 */

            
                virtual bool updateInfo() { return false; }


                /**

            
                 * Updates from another input window handle.

            
                 */

            
                void updateFrom(const sp<InputWindowHandle> handle);


                /**

            
                 * Releases the channel used by the associated information when it is

            
                 * no longer needed.

            
                 */

            
                void releaseChannel();


                // Not override since this class is not derrived from Parcelable.

            
                status_t readFromParcel(const android::Parcel* parcel);

            
                status_t writeToParcel(android::Parcel* parcel) const;


            protected:

            
                virtual ~InputWindowHandle();


                InputWindowInfo mInfo;

            
            };

            
            } // namespace android


            #endif // _UI_INPUT_WINDOW_H
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#ifndef _UI_INPUT_WINDOW_H
	#define _UI_INPUT_WINDOW_H

	#include <android/os/TouchOcclusionMode.h>
	#include <binder/Parcel.h>
	#include <binder/Parcelable.h>
	#include <input/Flags.h>
	#include <input/Input.h>
	#include <input/InputTransport.h>
	#include <ui/Rect.h>
	#include <ui/Region.h>
	#include <ui/Transform.h>
	#include <utils/RefBase.h>
	#include <utils/Timers.h>

	#include "InputApplication.h"

	using android::os::TouchOcclusionMode;

	namespace android {

	/*
	* Describes the properties of a window that can receive input.
	*/
	struct InputWindowInfo : public Parcelable {
	InputWindowInfo() = default;

	// Window flags from WindowManager.LayoutParams
	enum class Flag : uint32_t {
	ALLOW_LOCK_WHILE_SCREEN_ON = 0x00000001,
	DIM_BEHIND = 0x00000002,
	BLUR_BEHIND = 0x00000004,
	NOT_FOCUSABLE = 0x00000008,
	NOT_TOUCHABLE = 0x00000010,
	NOT_TOUCH_MODAL = 0x00000020,
	TOUCHABLE_WHEN_WAKING = 0x00000040,
	KEEP_SCREEN_ON = 0x00000080,
	LAYOUT_IN_SCREEN = 0x00000100,
	LAYOUT_NO_LIMITS = 0x00000200,
	FULLSCREEN = 0x00000400,
	FORCE_NOT_FULLSCREEN = 0x00000800,
	DITHER = 0x00001000,
	SECURE = 0x00002000,
	SCALED = 0x00004000,
	IGNORE_CHEEK_PRESSES = 0x00008000,
	LAYOUT_INSET_DECOR = 0x00010000,
	ALT_FOCUSABLE_IM = 0x00020000,
	WATCH_OUTSIDE_TOUCH = 0x00040000,
	SHOW_WHEN_LOCKED = 0x00080000,
	SHOW_WALLPAPER = 0x00100000,
	TURN_SCREEN_ON = 0x00200000,
	DISMISS_KEYGUARD = 0x00400000,
	SPLIT_TOUCH = 0x00800000,
	HARDWARE_ACCELERATED = 0x01000000,
	LAYOUT_IN_OVERSCAN = 0x02000000,
	TRANSLUCENT_STATUS = 0x04000000,
	TRANSLUCENT_NAVIGATION = 0x08000000,
	LOCAL_FOCUS_MODE = 0x10000000,
	SLIPPERY = 0x20000000,
	LAYOUT_ATTACHED_IN_DECOR = 0x40000000,
	DRAWS_SYSTEM_BAR_BACKGROUNDS = 0x80000000,
	}; // Window types from WindowManager.LayoutParams

	enum class Type : int32_t {
	UNKNOWN = 0,
	FIRST_APPLICATION_WINDOW = 1,
	BASE_APPLICATION = 1,
	APPLICATION = 2,
	APPLICATION_STARTING = 3,
	LAST_APPLICATION_WINDOW = 99,
	FIRST_SUB_WINDOW = 1000,
	APPLICATION_PANEL = FIRST_SUB_WINDOW,
	APPLICATION_MEDIA = FIRST_SUB_WINDOW + 1,
	APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW + 2,
	APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW + 3,
	APPLICATION_MEDIA_OVERLAY = FIRST_SUB_WINDOW + 4,
	LAST_SUB_WINDOW = 1999,
	FIRST_SYSTEM_WINDOW = 2000,
	STATUS_BAR = FIRST_SYSTEM_WINDOW,
	SEARCH_BAR = FIRST_SYSTEM_WINDOW + 1,
	PHONE = FIRST_SYSTEM_WINDOW + 2,
	SYSTEM_ALERT = FIRST_SYSTEM_WINDOW + 3,
	KEYGUARD = FIRST_SYSTEM_WINDOW + 4,
	TOAST = FIRST_SYSTEM_WINDOW + 5,
	SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW + 6,
	PRIORITY_PHONE = FIRST_SYSTEM_WINDOW + 7,
	SYSTEM_DIALOG = FIRST_SYSTEM_WINDOW + 8,
	KEYGUARD_DIALOG = FIRST_SYSTEM_WINDOW + 9,
	SYSTEM_ERROR = FIRST_SYSTEM_WINDOW + 10,
	INPUT_METHOD = FIRST_SYSTEM_WINDOW + 11,
	INPUT_METHOD_DIALOG = FIRST_SYSTEM_WINDOW + 12,
	WALLPAPER = FIRST_SYSTEM_WINDOW + 13,
	STATUS_BAR_PANEL = FIRST_SYSTEM_WINDOW + 14,
	SECURE_SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW + 15,
	DRAG = FIRST_SYSTEM_WINDOW + 16,
	STATUS_BAR_SUB_PANEL = FIRST_SYSTEM_WINDOW + 17,
	POINTER = FIRST_SYSTEM_WINDOW + 18,
	NAVIGATION_BAR = FIRST_SYSTEM_WINDOW + 19,
	VOLUME_OVERLAY = FIRST_SYSTEM_WINDOW + 20,
	BOOT_PROGRESS = FIRST_SYSTEM_WINDOW + 21,
	INPUT_CONSUMER = FIRST_SYSTEM_WINDOW + 22,
	NAVIGATION_BAR_PANEL = FIRST_SYSTEM_WINDOW + 24,
	MAGNIFICATION_OVERLAY = FIRST_SYSTEM_WINDOW + 27,
	ACCESSIBILITY_OVERLAY = FIRST_SYSTEM_WINDOW + 32,
	DOCK_DIVIDER = FIRST_SYSTEM_WINDOW + 34,
	ACCESSIBILITY_MAGNIFICATION_OVERLAY = FIRST_SYSTEM_WINDOW + 39,
	NOTIFICATION_SHADE = FIRST_SYSTEM_WINDOW + 40,
	LAST_SYSTEM_WINDOW = 2999,
	};

	enum class Feature {
	DISABLE_TOUCH_PAD_GESTURES = 0x00000001,
	NO_INPUT_CHANNEL = 0x00000002,
	DISABLE_USER_ACTIVITY = 0x00000004,
	};

	/* These values are filled in by the WM and passed through SurfaceFlinger
	* unless specified otherwise.
	*/
	// This value should NOT be used to uniquely identify the window. There may be different
	// input windows that have the same token.
	sp<IBinder> token;
	// This uniquely identifies the input window.
	int32_t id = -1;
	std::string name;
	Flags<Flag> flags;
	Type type = Type::UNKNOWN;
	std::chrono::nanoseconds dispatchingTimeout = std::chrono::seconds(5);

	/* These values are filled in by SurfaceFlinger. */
	int32_t frameLeft = -1;
	int32_t frameTop = -1;
	int32_t frameRight = -1;
	int32_t frameBottom = -1;

	/*
	* SurfaceFlinger consumes this value to shrink the computed frame. This is
	* different from shrinking the touchable region in that it DOES shift the coordinate
	* space where-as the touchable region does not and is more like "cropping". This
	* is used for window shadows.
	*/
	int32_t surfaceInset = 0;

	// A global scaling factor for all windows. Unlike windowScaleX/Y this results
	// in scaling of the TOUCH_MAJOR/TOUCH_MINOR axis.
	float globalScaleFactor = 1.0f;

	// The opacity of this window, from 0.0 to 1.0 (inclusive).
	// An alpha of 1.0 means fully opaque and 0.0 means fully transparent.
	float alpha;

	// Transform applied to individual windows.
	ui::Transform transform;

	// Display size in its natural rotation. Used to rotate raw coordinates for compatibility.
	int32_t displayWidth = AMOTION_EVENT_INVALID_DISPLAY_SIZE;
	int32_t displayHeight = AMOTION_EVENT_INVALID_DISPLAY_SIZE;

	/*
	* This is filled in by the WM relative to the frame and then translated
	* to absolute coordinates by SurfaceFlinger once the frame is computed.
	*/
	Region touchableRegion;
	bool visible = false;
	bool focusable = false;
	bool hasWallpaper = false;
	bool paused = false;
	/* This flag is set when the window is of a trusted type that is allowed to silently
	* overlay other windows for the purpose of implementing the secure views feature.
	* Trusted overlays, such as IME windows, can partly obscure other windows without causing
	* motion events to be delivered to them with AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED.
	*/
	bool trustedOverlay = false;
	TouchOcclusionMode touchOcclusionMode = TouchOcclusionMode::BLOCK_UNTRUSTED;
	int32_t ownerPid = -1;
	int32_t ownerUid = -1;
	std::string packageName;
	Flags<Feature> inputFeatures;
	int32_t displayId = ADISPLAY_ID_NONE;
	int32_t portalToDisplayId = ADISPLAY_ID_NONE;
	InputApplicationInfo applicationInfo;
	bool replaceTouchableRegionWithCrop = false;
	wp<IBinder> touchableRegionCropHandle;

	void addTouchableRegion(const Rect& region);

	bool touchableRegionContainsPoint(int32_t x, int32_t y) const;

	bool frameContainsPoint(int32_t x, int32_t y) const;

	bool supportsSplitTouch() const;

	bool overlaps(const InputWindowInfo* other) const;

	bool operator==(const InputWindowInfo& inputChannel) const;

	status_t writeToParcel(android::Parcel* parcel) const override;

	status_t readFromParcel(const android::Parcel* parcel) override;
	};

	/*
	* Handle for a window that can receive input.
	*
	* Used by the native input dispatcher to indirectly refer to the window manager objects
	* that describe a window.
	*/
	class InputWindowHandle : public RefBase {
	public:
	explicit InputWindowHandle();
	InputWindowHandle(const InputWindowHandle& other);
	InputWindowHandle(const InputWindowInfo& other);

	inline const InputWindowInfo* getInfo() const { return &mInfo; }

	sp<IBinder> getToken() const;

	int32_t getId() const { return mInfo.id; }

	sp<IBinder> getApplicationToken() { return mInfo.applicationInfo.token; }

	inline std::string getName() const { return !mInfo.name.empty() ? mInfo.name : "<invalid>"; }

	inline std::chrono::nanoseconds getDispatchingTimeout(
	std::chrono::nanoseconds defaultValue) const {
	return mInfo.token ? std::chrono::nanoseconds(mInfo.dispatchingTimeout) : defaultValue;
	}

	/**
	* Requests that the state of this object be updated to reflect
	* the most current available information about the application.
	* As this class is created as RefBase object, no pure virtual function is allowed.
	*
	* This method should only be called from within the input dispatcher's
	* critical section.
	*
	* Returns true on success, or false if the handle is no longer valid.
	*/
	virtual bool updateInfo() { return false; }

	/**
	* Updates from another input window handle.
	*/
	void updateFrom(const sp<InputWindowHandle> handle);

	/**
	* Releases the channel used by the associated information when it is
	* no longer needed.
	*/
	void releaseChannel();

	// Not override since this class is not derrived from Parcelable.
	status_t readFromParcel(const android::Parcel* parcel);
	status_t writeToParcel(android::Parcel* parcel) const;

	protected:
	virtual ~InputWindowHandle();

	InputWindowInfo mInfo;
	};
	} // namespace android

	#endif // _UI_INPUT_WINDOW_H