The Tor Browser: widget/gonk/libui/android_input.h@b8a032363ba2 (annotated)

widget/gonk/libui/android_input.h@b8a032363ba2 (annotated)

widget/gonk/libui/android_input.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * Copyright (C) 2010 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 _ANDROID_INPUT_H
 #define _ANDROID_INPUT_H
 /******************************************************************
  *
  * IMPORTANT NOTICE:
  *
  *   This file is part of Android's set of stable system headers
  *   exposed by the Android NDK (Native Development Kit).
  *
  *   Third-party source AND binary code relies on the definitions
  *   here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
  *
  *   - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
  *   - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
  *   - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
  *   - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
  */
 /*
  * Structures and functions to receive and process input events in
  * native code.
  *
  * NOTE: These functions MUST be implemented by /system/lib/libui.so
  */
 #include <stdint.h>
 #include <sys/types.h>
 #include "android_keycodes.h"
 #include <android/looper.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
 /*
  * Key states (may be returned by queries about the current state of a
  * particular key code, scan code or switch).
  */
 enum {
     /* The key state is unknown or the requested key itself is not supported. */
     AKEY_STATE_UNKNOWN = -1,
     /* The key is up. */
     AKEY_STATE_UP = 0,
     /* The key is down. */
     AKEY_STATE_DOWN = 1,
     /* The key is down but is a virtual key press that is being emulated by the system. */
     AKEY_STATE_VIRTUAL = 2
 };
 /*
  * Meta key / modifer state.
  */
 enum {
     /* No meta keys are pressed. */
     AMETA_NONE = 0,
     /* This mask is used to check whether one of the ALT meta keys is pressed. */
     AMETA_ALT_ON = 0x02,
     /* This mask is used to check whether the left ALT meta key is pressed. */
     AMETA_ALT_LEFT_ON = 0x10,
     /* This mask is used to check whether the right ALT meta key is pressed. */
     AMETA_ALT_RIGHT_ON = 0x20,
     /* This mask is used to check whether one of the SHIFT meta keys is pressed. */
     AMETA_SHIFT_ON = 0x01,
     /* This mask is used to check whether the left SHIFT meta key is pressed. */
     AMETA_SHIFT_LEFT_ON = 0x40,
     /* This mask is used to check whether the right SHIFT meta key is pressed. */
     AMETA_SHIFT_RIGHT_ON = 0x80,
     /* This mask is used to check whether the SYM meta key is pressed. */
     AMETA_SYM_ON = 0x04,
     /* This mask is used to check whether the FUNCTION meta key is pressed. */
     AMETA_FUNCTION_ON = 0x08,
     /* This mask is used to check whether one of the CTRL meta keys is pressed. */
     AMETA_CTRL_ON = 0x1000,
     /* This mask is used to check whether the left CTRL meta key is pressed. */
     AMETA_CTRL_LEFT_ON = 0x2000,
     /* This mask is used to check whether the right CTRL meta key is pressed. */
     AMETA_CTRL_RIGHT_ON = 0x4000,
     /* This mask is used to check whether one of the META meta keys is pressed. */
     AMETA_META_ON = 0x10000,
     /* This mask is used to check whether the left META meta key is pressed. */
     AMETA_META_LEFT_ON = 0x20000,
     /* This mask is used to check whether the right META meta key is pressed. */
     AMETA_META_RIGHT_ON = 0x40000,
     /* This mask is used to check whether the CAPS LOCK meta key is on. */
     AMETA_CAPS_LOCK_ON = 0x100000,
     /* This mask is used to check whether the NUM LOCK meta key is on. */
     AMETA_NUM_LOCK_ON = 0x200000,
     /* This mask is used to check whether the SCROLL LOCK meta key is on. */
     AMETA_SCROLL_LOCK_ON = 0x400000,
 };
 /*
  * Input events.
  *
  * Input events are opaque structures.  Use the provided accessors functions to
  * read their properties.
  */
 struct AInputEvent;
 typedef struct AInputEvent AInputEvent;
 /*
  * Input event types.
  */
 enum {
     /* Indicates that the input event is a key event. */
     AINPUT_EVENT_TYPE_KEY = 1,
     /* Indicates that the input event is a motion event. */
     AINPUT_EVENT_TYPE_MOTION = 2
 };
 /*
  * Key event actions.
  */
 enum {
     /* The key has been pressed down. */
     AKEY_EVENT_ACTION_DOWN = 0,
     /* The key has been released. */
     AKEY_EVENT_ACTION_UP = 1,
     /* Multiple duplicate key events have occurred in a row, or a complex string is
      * being delivered.  The repeat_count property of the key event contains the number
      * of times the given key code should be executed.
      */
     AKEY_EVENT_ACTION_MULTIPLE = 2
 };
 /*
  * Key event flags.
  */
 enum {
     /* This mask is set if the device woke because of this key event. */
     AKEY_EVENT_FLAG_WOKE_HERE = 0x1,
     /* This mask is set if the key event was generated by a software keyboard. */
     AKEY_EVENT_FLAG_SOFT_KEYBOARD = 0x2,
     /* This mask is set if we don't want the key event to cause us to leave touch mode. */
     AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = 0x4,
     /* This mask is set if an event was known to come from a trusted part
      * of the system.  That is, the event is known to come from the user,
      * and could not have been spoofed by a third party component. */
     AKEY_EVENT_FLAG_FROM_SYSTEM = 0x8,
     /* This mask is used for compatibility, to identify enter keys that are
      * coming from an IME whose enter key has been auto-labelled "next" or
      * "done".  This allows TextView to dispatch these as normal enter keys
      * for old applications, but still do the appropriate action when
      * receiving them. */
     AKEY_EVENT_FLAG_EDITOR_ACTION = 0x10,
     /* When associated with up key events, this indicates that the key press
      * has been canceled.  Typically this is used with virtual touch screen
      * keys, where the user can slide from the virtual key area on to the
      * display: in that case, the application will receive a canceled up
      * event and should not perform the action normally associated with the
      * key.  Note that for this to work, the application can not perform an
      * action for a key until it receives an up or the long press timeout has
      * expired. */
     AKEY_EVENT_FLAG_CANCELED = 0x20,
     /* This key event was generated by a virtual (on-screen) hard key area.
      * Typically this is an area of the touchscreen, outside of the regular
      * display, dedicated to "hardware" buttons. */
     AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = 0x40,
     /* This flag is set for the first key repeat that occurs after the
      * long press timeout. */
     AKEY_EVENT_FLAG_LONG_PRESS = 0x80,
     /* Set when a key event has AKEY_EVENT_FLAG_CANCELED set because a long
      * press action was executed while it was down. */
     AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = 0x100,
     /* Set for AKEY_EVENT_ACTION_UP when this event's key code is still being
      * tracked from its initial down.  That is, somebody requested that tracking
      * started on the key down and a long press has not caused
      * the tracking to be canceled. */
     AKEY_EVENT_FLAG_TRACKING = 0x200,
     /* Set when a key event has been synthesized to implement default behavior
      * for an event that the application did not handle.
      * Fallback key events are generated by unhandled trackball motions
      * (to emulate a directional keypad) and by certain unhandled key presses
      * that are declared in the key map (such as special function numeric keypad
      * keys when numlock is off). */
     AKEY_EVENT_FLAG_FALLBACK = 0x400,
 };
 /*
  * Motion event actions.
  */
 /* Bit shift for the action bits holding the pointer index as
  * defined by AMOTION_EVENT_ACTION_POINTER_INDEX_MASK.
  */
 #define AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT 8
 enum {
     /* Bit mask of the parts of the action code that are the action itself.
      */
     AMOTION_EVENT_ACTION_MASK = 0xff,
     /* Bits in the action code that represent a pointer index, used with
      * AMOTION_EVENT_ACTION_POINTER_DOWN and AMOTION_EVENT_ACTION_POINTER_UP.  Shifting
      * down by AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT provides the actual pointer
      * index where the data for the pointer going up or down can be found.
      */
     AMOTION_EVENT_ACTION_POINTER_INDEX_MASK  = 0xff00,
     /* A pressed gesture has started, the motion contains the initial starting location.
      */
     AMOTION_EVENT_ACTION_DOWN = 0,
     /* A pressed gesture has finished, the motion contains the final release location
      * as well as any intermediate points since the last down or move event.
      */
     AMOTION_EVENT_ACTION_UP = 1,
     /* A change has happened during a press gesture (between AMOTION_EVENT_ACTION_DOWN and
      * AMOTION_EVENT_ACTION_UP).  The motion contains the most recent point, as well as
      * any intermediate points since the last down or move event.
      */
     AMOTION_EVENT_ACTION_MOVE = 2,
     /* The current gesture has been aborted.
      * You will not receive any more points in it.  You should treat this as
      * an up event, but not perform any action that you normally would.
      */
     AMOTION_EVENT_ACTION_CANCEL = 3,
     /* A movement has happened outside of the normal bounds of the UI element.
      * This does not provide a full gesture, but only the initial location of the movement/touch.
      */
     AMOTION_EVENT_ACTION_OUTSIDE = 4,
     /* A non-primary pointer has gone down.
      * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
      */
     AMOTION_EVENT_ACTION_POINTER_DOWN = 5,
     /* A non-primary pointer has gone up.
      * The bits in AMOTION_EVENT_ACTION_POINTER_INDEX_MASK indicate which pointer changed.
      */
     AMOTION_EVENT_ACTION_POINTER_UP = 6,
     /* A change happened but the pointer is not down (unlike AMOTION_EVENT_ACTION_MOVE).
      * The motion contains the most recent point, as well as any intermediate points since
      * the last hover move event.
      */
     AMOTION_EVENT_ACTION_HOVER_MOVE = 7,
     /* The motion event contains relative vertical and/or horizontal scroll offsets.
      * Use getAxisValue to retrieve the information from AMOTION_EVENT_AXIS_VSCROLL
      * and AMOTION_EVENT_AXIS_HSCROLL.
      * The pointer may or may not be down when this event is dispatched.
      * This action is always delivered to the winder under the pointer, which
      * may not be the window currently touched.
      */
     AMOTION_EVENT_ACTION_SCROLL = 8,
     /* The pointer is not down but has entered the boundaries of a window or view.
      */
     AMOTION_EVENT_ACTION_HOVER_ENTER = 9,
     /* The pointer is not down but has exited the boundaries of a window or view.
      */
     AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
 };
 /*
  * Motion event flags.
  */
 enum {
     /* This flag indicates that the window that received this motion event is partly
      * or wholly obscured by another visible window above it.  This flag is set to true
      * even if the event did not directly pass through the obscured area.
      * A security sensitive application can check this flag to identify situations in which
      * a malicious application may have covered up part of its content for the purpose
      * of misleading the user or hijacking touches.  An appropriate response might be
      * to drop the suspect touches or to take additional precautions to confirm the user's
      * actual intent.
      */
     AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED = 0x1,
 };
 /*
  * Motion event edge touch flags.
  */
 enum {
     /* No edges intersected */
     AMOTION_EVENT_EDGE_FLAG_NONE = 0,
     /* Flag indicating the motion event intersected the top edge of the screen. */
     AMOTION_EVENT_EDGE_FLAG_TOP = 0x01,
     /* Flag indicating the motion event intersected the bottom edge of the screen. */
     AMOTION_EVENT_EDGE_FLAG_BOTTOM = 0x02,
     /* Flag indicating the motion event intersected the left edge of the screen. */
     AMOTION_EVENT_EDGE_FLAG_LEFT = 0x04,
     /* Flag indicating the motion event intersected the right edge of the screen. */
     AMOTION_EVENT_EDGE_FLAG_RIGHT = 0x08
 };
 /*
  * Constants that identify each individual axis of a motion event.
  * Refer to the documentation on the MotionEvent class for descriptions of each axis.
  */
 enum {
     AMOTION_EVENT_AXIS_X = 0,
     AMOTION_EVENT_AXIS_Y = 1,
     AMOTION_EVENT_AXIS_PRESSURE = 2,
     AMOTION_EVENT_AXIS_SIZE = 3,
     AMOTION_EVENT_AXIS_TOUCH_MAJOR = 4,
     AMOTION_EVENT_AXIS_TOUCH_MINOR = 5,
     AMOTION_EVENT_AXIS_TOOL_MAJOR = 6,
     AMOTION_EVENT_AXIS_TOOL_MINOR = 7,
     AMOTION_EVENT_AXIS_ORIENTATION = 8,
     AMOTION_EVENT_AXIS_VSCROLL = 9,
     AMOTION_EVENT_AXIS_HSCROLL = 10,
     AMOTION_EVENT_AXIS_Z = 11,
     AMOTION_EVENT_AXIS_RX = 12,
     AMOTION_EVENT_AXIS_RY = 13,
     AMOTION_EVENT_AXIS_RZ = 14,
     AMOTION_EVENT_AXIS_HAT_X = 15,
     AMOTION_EVENT_AXIS_HAT_Y = 16,
     AMOTION_EVENT_AXIS_LTRIGGER = 17,
     AMOTION_EVENT_AXIS_RTRIGGER = 18,
     AMOTION_EVENT_AXIS_THROTTLE = 19,
     AMOTION_EVENT_AXIS_RUDDER = 20,
     AMOTION_EVENT_AXIS_WHEEL = 21,
     AMOTION_EVENT_AXIS_GAS = 22,
     AMOTION_EVENT_AXIS_BRAKE = 23,
     AMOTION_EVENT_AXIS_DISTANCE = 24,
     AMOTION_EVENT_AXIS_TILT = 25,
     AMOTION_EVENT_AXIS_GENERIC_1 = 32,
     AMOTION_EVENT_AXIS_GENERIC_2 = 33,
     AMOTION_EVENT_AXIS_GENERIC_3 = 34,
     AMOTION_EVENT_AXIS_GENERIC_4 = 35,
     AMOTION_EVENT_AXIS_GENERIC_5 = 36,
     AMOTION_EVENT_AXIS_GENERIC_6 = 37,
     AMOTION_EVENT_AXIS_GENERIC_7 = 38,
     AMOTION_EVENT_AXIS_GENERIC_8 = 39,
     AMOTION_EVENT_AXIS_GENERIC_9 = 40,
     AMOTION_EVENT_AXIS_GENERIC_10 = 41,
     AMOTION_EVENT_AXIS_GENERIC_11 = 42,
     AMOTION_EVENT_AXIS_GENERIC_12 = 43,
     AMOTION_EVENT_AXIS_GENERIC_13 = 44,
     AMOTION_EVENT_AXIS_GENERIC_14 = 45,
     AMOTION_EVENT_AXIS_GENERIC_15 = 46,
     AMOTION_EVENT_AXIS_GENERIC_16 = 47,
     // NOTE: If you add a new axis here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.
 };
 /*
  * Constants that identify buttons that are associated with motion events.
  * Refer to the documentation on the MotionEvent class for descriptions of each button.
  */
 enum {
     AMOTION_EVENT_BUTTON_PRIMARY = 1 << 0,
     AMOTION_EVENT_BUTTON_SECONDARY = 1 << 1,
     AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
     AMOTION_EVENT_BUTTON_BACK = 1 << 3,
     AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
 };
 /*
  * Constants that identify tool types.
  * Refer to the documentation on the MotionEvent class for descriptions of each tool type.
  */
 enum {
     AMOTION_EVENT_TOOL_TYPE_UNKNOWN = 0,
     AMOTION_EVENT_TOOL_TYPE_FINGER = 1,
     AMOTION_EVENT_TOOL_TYPE_STYLUS = 2,
     AMOTION_EVENT_TOOL_TYPE_MOUSE = 3,
     AMOTION_EVENT_TOOL_TYPE_ERASER = 4,
 };
 /*
  * Input sources.
  *
  * Refer to the documentation on android.view.InputDevice for more details about input sources
  * and their correct interpretation.
  */
 enum {
     AINPUT_SOURCE_CLASS_MASK = 0x000000ff,
     AINPUT_SOURCE_CLASS_NONE = 0x00000000,
     AINPUT_SOURCE_CLASS_BUTTON = 0x00000001,
     AINPUT_SOURCE_CLASS_POINTER = 0x00000002,
     AINPUT_SOURCE_CLASS_NAVIGATION = 0x00000004,
     AINPUT_SOURCE_CLASS_POSITION = 0x00000008,
     AINPUT_SOURCE_CLASS_JOYSTICK = 0x00000010,
 };
 enum {
     AINPUT_SOURCE_UNKNOWN = 0x00000000,
     AINPUT_SOURCE_KEYBOARD = 0x00000100 | AINPUT_SOURCE_CLASS_BUTTON,
     AINPUT_SOURCE_DPAD = 0x00000200 | AINPUT_SOURCE_CLASS_BUTTON,
     AINPUT_SOURCE_GAMEPAD = 0x00000400 | AINPUT_SOURCE_CLASS_BUTTON,
     AINPUT_SOURCE_TOUCHSCREEN = 0x00001000 | AINPUT_SOURCE_CLASS_POINTER,
     AINPUT_SOURCE_MOUSE = 0x00002000 | AINPUT_SOURCE_CLASS_POINTER,
     AINPUT_SOURCE_STYLUS = 0x00004000 | AINPUT_SOURCE_CLASS_POINTER,
     AINPUT_SOURCE_TRACKBALL = 0x00010000 | AINPUT_SOURCE_CLASS_NAVIGATION,
     AINPUT_SOURCE_TOUCHPAD = 0x00100000 | AINPUT_SOURCE_CLASS_POSITION,
     AINPUT_SOURCE_TOUCH_NAVIGATION = 0x00200000 | AINPUT_SOURCE_CLASS_NONE,
     AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
     AINPUT_SOURCE_ANY = 0xffffff00,
 };
 /*
  * Keyboard types.
  *
  * Refer to the documentation on android.view.InputDevice for more details.
  */
 enum {
     AINPUT_KEYBOARD_TYPE_NONE = 0,
     AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC = 1,
     AINPUT_KEYBOARD_TYPE_ALPHABETIC = 2,
 };
 /*
  * Constants used to retrieve information about the range of motion for a particular
  * coordinate of a motion event.
  *
  * Refer to the documentation on android.view.InputDevice for more details about input sources
  * and their correct interpretation.
  *
  * DEPRECATION NOTICE: These constants are deprecated.  Use AMOTION_EVENT_AXIS_* constants instead.
  */
 enum {
     AINPUT_MOTION_RANGE_X = AMOTION_EVENT_AXIS_X,
     AINPUT_MOTION_RANGE_Y = AMOTION_EVENT_AXIS_Y,
     AINPUT_MOTION_RANGE_PRESSURE = AMOTION_EVENT_AXIS_PRESSURE,
     AINPUT_MOTION_RANGE_SIZE = AMOTION_EVENT_AXIS_SIZE,
     AINPUT_MOTION_RANGE_TOUCH_MAJOR = AMOTION_EVENT_AXIS_TOUCH_MAJOR,
     AINPUT_MOTION_RANGE_TOUCH_MINOR = AMOTION_EVENT_AXIS_TOUCH_MINOR,
     AINPUT_MOTION_RANGE_TOOL_MAJOR = AMOTION_EVENT_AXIS_TOOL_MAJOR,
     AINPUT_MOTION_RANGE_TOOL_MINOR = AMOTION_EVENT_AXIS_TOOL_MINOR,
     AINPUT_MOTION_RANGE_ORIENTATION = AMOTION_EVENT_AXIS_ORIENTATION,
 } __attribute__ ((deprecated));
 /*
  * Input event accessors.
  *
  * Note that most functions can only be used on input events that are of a given type.
  * Calling these functions on input events of other types will yield undefined behavior.
  */
 /*** Accessors for all input events. ***/
 /* Get the input event type. */
 int32_t AInputEvent_getType(const AInputEvent* event);
 /* Get the id for the device that an input event came from.
  *
  * Input events can be generated by multiple different input devices.
  * Use the input device id to obtain information about the input
  * device that was responsible for generating a particular event.
  *
  * An input device id of 0 indicates that the event didn't come from a physical device;
  * other numbers are arbitrary and you shouldn't depend on the values.
  * Use the provided input device query API to obtain information about input devices.
  */
 int32_t AInputEvent_getDeviceId(const AInputEvent* event);
 /* Get the input event source. */
 int32_t AInputEvent_getSource(const AInputEvent* event);
 /*** Accessors for key events only. ***/
 /* Get the key event action. */
 int32_t AKeyEvent_getAction(const AInputEvent* key_event);
 /* Get the key event flags. */
 int32_t AKeyEvent_getFlags(const AInputEvent* key_event);
 /* Get the key code of the key event.
  * This is the physical key that was pressed, not the Unicode character. */
 int32_t AKeyEvent_getKeyCode(const AInputEvent* key_event);
 /* Get the hardware key id of this key event.
  * These values are not reliable and vary from device to device. */
 int32_t AKeyEvent_getScanCode(const AInputEvent* key_event);
 /* Get the meta key state. */
 int32_t AKeyEvent_getMetaState(const AInputEvent* key_event);
 /* Get the repeat count of the event.
  * For both key up an key down events, this is the number of times the key has
  * repeated with the first down starting at 0 and counting up from there.  For
  * multiple key events, this is the number of down/up pairs that have occurred. */
 int32_t AKeyEvent_getRepeatCount(const AInputEvent* key_event);
 /* Get the time of the most recent key down event, in the
  * java.lang.System.nanoTime() time base.  If this is a down event,
  * this will be the same as eventTime.
  * Note that when chording keys, this value is the down time of the most recently
  * pressed key, which may not be the same physical key of this event. */
 int64_t AKeyEvent_getDownTime(const AInputEvent* key_event);
 /* Get the time this event occurred, in the
  * java.lang.System.nanoTime() time base. */
 int64_t AKeyEvent_getEventTime(const AInputEvent* key_event);
 /*** Accessors for motion events only. ***/
 /* Get the combined motion event action code and pointer index. */
 int32_t AMotionEvent_getAction(const AInputEvent* motion_event);
 /* Get the motion event flags. */
 int32_t AMotionEvent_getFlags(const AInputEvent* motion_event);
 /* Get the state of any meta / modifier keys that were in effect when the
  * event was generated. */
 int32_t AMotionEvent_getMetaState(const AInputEvent* motion_event);
 /* Get the button state of all buttons that are pressed. */
 int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event);
 /* Get a bitfield indicating which edges, if any, were touched by this motion event.
  * For touch events, clients can use this to determine if the user's finger was
  * touching the edge of the display. */
 int32_t AMotionEvent_getEdgeFlags(const AInputEvent* motion_event);
 /* Get the time when the user originally pressed down to start a stream of
  * position events, in the java.lang.System.nanoTime() time base. */
 int64_t AMotionEvent_getDownTime(const AInputEvent* motion_event);
 /* Get the time when this specific event was generated,
  * in the java.lang.System.nanoTime() time base. */
 int64_t AMotionEvent_getEventTime(const AInputEvent* motion_event);
 /* Get the X coordinate offset.
  * For touch events on the screen, this is the delta that was added to the raw
  * screen coordinates to adjust for the absolute position of the containing windows
  * and views. */
 float AMotionEvent_getXOffset(const AInputEvent* motion_event);
 /* Get the precision of the Y coordinates being reported.
  * For touch events on the screen, this is the delta that was added to the raw
  * screen coordinates to adjust for the absolute position of the containing windows
  * and views. */
 float AMotionEvent_getYOffset(const AInputEvent* motion_event);
 /* Get the precision of the X coordinates being reported.
  * You can multiply this number with an X coordinate sample to find the
  * actual hardware value of the X coordinate. */
 float AMotionEvent_getXPrecision(const AInputEvent* motion_event);
 /* Get the precision of the Y coordinates being reported.
  * You can multiply this number with a Y coordinate sample to find the
  * actual hardware value of the Y coordinate. */
 float AMotionEvent_getYPrecision(const AInputEvent* motion_event);
 /* Get the number of pointers of data contained in this event.
  * Always >= 1. */
 size_t AMotionEvent_getPointerCount(const AInputEvent* motion_event);
 /* Get the pointer identifier associated with a particular pointer
  * data index in this event.  The identifier tells you the actual pointer
  * number associated with the data, accounting for individual pointers
  * going up and down since the start of the current gesture. */
 int32_t AMotionEvent_getPointerId(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the tool type of a pointer for the given pointer index.
  * The tool type indicates the type of tool used to make contact such as a
  * finger or stylus, if known. */
 int32_t AMotionEvent_getToolType(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the original raw X coordinate of this event.
  * For touch events on the screen, this is the original location of the event
  * on the screen, before it had been adjusted for the containing window
  * and views. */
 float AMotionEvent_getRawX(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the original raw X coordinate of this event.
  * For touch events on the screen, this is the original location of the event
  * on the screen, before it had been adjusted for the containing window
  * and views. */
 float AMotionEvent_getRawY(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current X coordinate of this event for the given pointer index.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getX(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current Y coordinate of this event for the given pointer index.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getY(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current pressure of this event for the given pointer index.
  * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
  * although values higher than 1 may be generated depending on the calibration of
  * the input device. */
 float AMotionEvent_getPressure(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current scaled value of the approximate size for the given pointer index.
  * This represents some approximation of the area of the screen being
  * pressed; the actual value in pixels corresponding to the
  * touch is normalized with the device specific range of values
  * and scaled to a value between 0 and 1.  The value of size can be used to
  * determine fat touch events. */
 float AMotionEvent_getSize(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current length of the major axis of an ellipse that describes the touch area
  * at the point of contact for the given pointer index. */
 float AMotionEvent_getTouchMajor(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current length of the minor axis of an ellipse that describes the touch area
  * at the point of contact for the given pointer index. */
 float AMotionEvent_getTouchMinor(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current length of the major axis of an ellipse that describes the size
  * of the approaching tool for the given pointer index.
  * The tool area represents the estimated size of the finger or pen that is
  * touching the device independent of its actual touch area at the point of contact. */
 float AMotionEvent_getToolMajor(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current length of the minor axis of an ellipse that describes the size
  * of the approaching tool for the given pointer index.
  * The tool area represents the estimated size of the finger or pen that is
  * touching the device independent of its actual touch area at the point of contact. */
 float AMotionEvent_getToolMinor(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the current orientation of the touch area and tool area in radians clockwise from
  * vertical for the given pointer index.
  * An angle of 0 degrees indicates that the major axis of contact is oriented
  * upwards, is perfectly circular or is of unknown orientation.  A positive angle
  * indicates that the major axis of contact is oriented to the right.  A negative angle
  * indicates that the major axis of contact is oriented to the left.
  * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
  * (finger pointing fully right). */
 float AMotionEvent_getOrientation(const AInputEvent* motion_event, size_t pointer_index);
 /* Get the value of the request axis for the given pointer index. */
 float AMotionEvent_getAxisValue(const AInputEvent* motion_event,
         int32_t axis, size_t pointer_index);
 /* Get the number of historical points in this event.  These are movements that
  * have occurred between this event and the previous event.  This only applies
  * to AMOTION_EVENT_ACTION_MOVE events -- all other actions will have a size of 0.
  * Historical samples are indexed from oldest to newest. */
 size_t AMotionEvent_getHistorySize(const AInputEvent* motion_event);
 /* Get the time that a historical movement occurred between this event and
  * the previous event, in the java.lang.System.nanoTime() time base. */
 int64_t AMotionEvent_getHistoricalEventTime(AInputEvent* motion_event,
         size_t history_index);
 /* Get the historical raw X coordinate of this event for the given pointer index that
  * occurred between this event and the previous motion event.
  * For touch events on the screen, this is the original location of the event
  * on the screen, before it had been adjusted for the containing window
  * and views.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getHistoricalRawX(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical raw Y coordinate of this event for the given pointer index that
  * occurred between this event and the previous motion event.
  * For touch events on the screen, this is the original location of the event
  * on the screen, before it had been adjusted for the containing window
  * and views.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getHistoricalRawY(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical X coordinate of this event for the given pointer index that
  * occurred between this event and the previous motion event.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getHistoricalX(AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical Y coordinate of this event for the given pointer index that
  * occurred between this event and the previous motion event.
  * Whole numbers are pixels; the value may have a fraction for input devices
  * that are sub-pixel precise. */
 float AMotionEvent_getHistoricalY(AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical pressure of this event for the given pointer index that
  * occurred between this event and the previous motion event.
  * The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
  * although values higher than 1 may be generated depending on the calibration of
  * the input device. */
 float AMotionEvent_getHistoricalPressure(AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the current scaled value of the approximate size for the given pointer index that
  * occurred between this event and the previous motion event.
  * This represents some approximation of the area of the screen being
  * pressed; the actual value in pixels corresponding to the
  * touch is normalized with the device specific range of values
  * and scaled to a value between 0 and 1.  The value of size can be used to
  * determine fat touch events. */
 float AMotionEvent_getHistoricalSize(AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical length of the major axis of an ellipse that describes the touch area
  * at the point of contact for the given pointer index that
  * occurred between this event and the previous motion event. */
 float AMotionEvent_getHistoricalTouchMajor(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical length of the minor axis of an ellipse that describes the touch area
  * at the point of contact for the given pointer index that
  * occurred between this event and the previous motion event. */
 float AMotionEvent_getHistoricalTouchMinor(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical length of the major axis of an ellipse that describes the size
  * of the approaching tool for the given pointer index that
  * occurred between this event and the previous motion event.
  * The tool area represents the estimated size of the finger or pen that is
  * touching the device independent of its actual touch area at the point of contact. */
 float AMotionEvent_getHistoricalToolMajor(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical length of the minor axis of an ellipse that describes the size
  * of the approaching tool for the given pointer index that
  * occurred between this event and the previous motion event.
  * The tool area represents the estimated size of the finger or pen that is
  * touching the device independent of its actual touch area at the point of contact. */
 float AMotionEvent_getHistoricalToolMinor(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical orientation of the touch area and tool area in radians clockwise from
  * vertical for the given pointer index that
  * occurred between this event and the previous motion event.
  * An angle of 0 degrees indicates that the major axis of contact is oriented
  * upwards, is perfectly circular or is of unknown orientation.  A positive angle
  * indicates that the major axis of contact is oriented to the right.  A negative angle
  * indicates that the major axis of contact is oriented to the left.
  * The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
  * (finger pointing fully right). */
 float AMotionEvent_getHistoricalOrientation(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 /* Get the historical value of the request axis for the given pointer index
  * that occurred between this event and the previous motion event. */
 float AMotionEvent_getHistoricalAxisValue(const AInputEvent* motion_event,
         int32_t axis, size_t pointer_index, size_t history_index);
 /*
  * Input queue
  *
  * An input queue is the facility through which you retrieve input
  * events.
  */
 struct AInputQueue;
 typedef struct AInputQueue AInputQueue;
 /*
  * Add this input queue to a looper for processing.  See
  * ALooper_addFd() for information on the ident, callback, and data params.
  */
 void AInputQueue_attachLooper(AInputQueue* queue, ALooper* looper,
         int ident, ALooper_callbackFunc callback, void* data);
 /*
  * Remove the input queue from the looper it is currently attached to.
  */
 void AInputQueue_detachLooper(AInputQueue* queue);
 /*
  * Returns true if there are one or more events available in the
  * input queue.  Returns 1 if the queue has events; 0 if
  * it does not have events; and a negative value if there is an error.
  */
 int32_t AInputQueue_hasEvents(AInputQueue* queue);
 /*
  * Returns the next available event from the queue.  Returns a negative
  * value if no events are available or an error has occurred.
  */
 int32_t AInputQueue_getEvent(AInputQueue* queue, AInputEvent** outEvent);
 /*
  * Sends the key for standard pre-dispatching -- that is, possibly deliver
  * it to the current IME to be consumed before the app.  Returns 0 if it
  * was not pre-dispatched, meaning you can process it right now.  If non-zero
  * is returned, you must abandon the current event processing and allow the
  * event to appear again in the event queue (if it does not get consumed during
  * pre-dispatching).
  */
 int32_t AInputQueue_preDispatchEvent(AInputQueue* queue, AInputEvent* event);
 /*
  * Report that dispatching has finished with the given event.
  * This must be called after receiving an event with AInputQueue_get_event().
  */
 void AInputQueue_finishEvent(AInputQueue* queue, AInputEvent* event, int handled);
 #ifdef __cplusplus
 }
 #endif
 #endif // _ANDROID_INPUT_H

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widget/gonk/libui/android_input.h@b8a032363ba2 (annotated)

widget/gonk/libui/android_input.h