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Add suuport for splitting touch events across windows. 

This feature is currently used to enable dragging the start and end
selection handles of a TextView at the same time.  Could be used for
other things later.

Deleted some dead code in ArrowKeyMovementMethod and CursorControllers.

Change-Id: I930accd97ca1ca1917aab8a807db2c950fc7b409
This commit is contained in:
Jeff Brown 2010-09-26 22:20:12 -07:00
parent a939afe212
commit d1b0a2bfe5
6 changed files with 657 additions and 378 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/ui/Input.h
View File

@ -40,9 +40,17 @@ enum {
/*
* Maximum number of pointers supported per motion event.
* Smallest number of pointers is 1.
*/
#define MAX_POINTERS 10
/*
* Maximum pointer id value supported in a motion event.
* Smallest pointer id is 0.
* (This is limited by our use of BitSet32 to track pointer assignments.)
*/
#define MAX_POINTER_ID 31
/*
* Declare a concrete type for the NDK's input event forward declaration.
*/

122
include/ui/InputDispatcher.h
View File

@ -27,6 +27,7 @@
#include <utils/String8.h>
#include <utils/Looper.h>
#include <utils/Pool.h>
#include <utils/BitSet.h>
#include <stddef.h>
#include <unistd.h>
@ -89,17 +90,13 @@ struct InputTarget {
* AMOTION_EVENT_ACTION_OUTSIDE to this target. */
FLAG_OUTSIDE = 0x02,
/* This flag indicates that a KeyEvent or MotionEvent is being canceled.
* In the case of a key event, it should be delivered with flag
* AKEY_EVENT_FLAG_CANCELED set.
* In the case of a motion event, it should be delivered with action
* AMOTION_EVENT_ACTION_CANCEL instead. */
FLAG_CANCEL = 0x04,
/* This flag indicates that the target of a MotionEvent is partly or wholly
* obscured by another visible window above it. The motion event should be
* delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED. */
FLAG_WINDOW_IS_OBSCURED = 0x08,
FLAG_WINDOW_IS_OBSCURED = 0x04,
/* This flag indicates that a motion event is being split across multiple windows. */
FLAG_SPLIT = 0x08,
};
// The input channel to be targeted.
@ -111,6 +108,13 @@ struct InputTarget {
// The x and y offset to add to a MotionEvent as it is delivered.
// (ignored for KeyEvents)
float xOffset, yOffset;
// The window type of the input target.
int32_t windowType;
// The subset of pointer ids to include in motion events dispatched to this input target
// if FLAG_SPLIT is set.
BitSet32 pointerIds;
};
@ -143,7 +147,7 @@ struct InputWindow {
FLAG_SHOW_WALLPAPER = 0x00100000,
FLAG_TURN_SCREEN_ON = 0x00200000,
FLAG_DISMISS_KEYGUARD = 0x00400000,
FLAG_IMMERSIVE = 0x00800000,
FLAG_SPLIT_TOUCH = 0x00800000,
FLAG_KEEP_SURFACE_WHILE_ANIMATING = 0x10000000,
FLAG_COMPATIBLE_WINDOW = 0x20000000,
FLAG_SYSTEM_ERROR = 0x40000000,
@ -276,7 +280,7 @@ public:
const KeyEvent* keyEvent, uint32_t policyFlags) = 0;
/* Poke user activity for an event dispatched to a window. */
virtual void pokeUserActivity(nsecs_t eventTime, int32_t windowType, int32_t eventType) = 0;
virtual void pokeUserActivity(nsecs_t eventTime, int32_t eventType) = 0;
/* Checks whether a given application pid/uid has permission to inject input events
* into other applications.
@ -415,6 +419,16 @@ private:
T* prev;
};
struct InjectionState {
mutable int32_t refCount;
int32_t injectorPid;
int32_t injectorUid;
int32_t injectionResult; // initially INPUT_EVENT_INJECTION_PENDING
bool injectionIsAsync; // set to true if injection is not waiting for the result
int32_t pendingForegroundDispatches; // the number of foreground dispatches in progress
};
struct EventEntry : Link<EventEntry> {
enum {
TYPE_SENTINEL,
@ -423,21 +437,14 @@ private:
TYPE_MOTION
};
int32_t refCount;
mutable int32_t refCount;
int32_t type;
nsecs_t eventTime;
int32_t injectionResult; // initially INPUT_EVENT_INJECTION_PENDING
bool injectionIsAsync; // set to true if injection is not waiting for the result
int32_t injectorPid; // -1 if not injected
int32_t injectorUid; // -1 if not injected
InjectionState* injectionState;
bool dispatchInProgress; // initially false, set to true while dispatching
int32_t pendingForegroundDispatches; // the number of foreground dispatches in progress
inline bool isInjected() { return injectorPid >= 0; }
void recycle();
inline bool isInjected() { return injectionState != NULL; }
};
struct ConfigurationChangedEntry : EventEntry {
@ -463,8 +470,6 @@ private:
INTERCEPT_KEY_RESULT_CONTINUE,
};
InterceptKeyResult interceptKeyResult; // set based on the interception result
void recycle();
};
struct MotionSample {
@ -521,6 +526,10 @@ private:
inline bool hasForegroundTarget() const {
return targetFlags & InputTarget::FLAG_FOREGROUND;
}
inline bool isSplit() const {
return targetFlags & InputTarget::FLAG_SPLIT;
}
};
// A command entry captures state and behavior for an action to be performed in the
@ -555,7 +564,6 @@ private:
KeyEntry* keyEntry;
sp<InputChannel> inputChannel;
sp<InputApplicationHandle> inputApplicationHandle;
int32_t windowType;
int32_t userActivityEventType;
};
@ -611,6 +619,7 @@ private:
public:
Allocator();
InjectionState* obtainInjectionState(int32_t injectorPid, int32_t injectorUid);
ConfigurationChangedEntry* obtainConfigurationChangedEntry(nsecs_t eventTime);
KeyEntry* obtainKeyEntry(nsecs_t eventTime,
int32_t deviceId, int32_t source, uint32_t policyFlags, int32_t action,
@ -626,6 +635,7 @@ private:
int32_t targetFlags, float xOffset, float yOffset);
CommandEntry* obtainCommandEntry(Command command);
void releaseInjectionState(InjectionState* injectionState);
void releaseEventEntry(EventEntry* entry);
void releaseConfigurationChangedEntry(ConfigurationChangedEntry* entry);
void releaseKeyEntry(KeyEntry* entry);
@ -633,10 +643,13 @@ private:
void releaseDispatchEntry(DispatchEntry* entry);
void releaseCommandEntry(CommandEntry* entry);
void recycleKeyEntry(KeyEntry* entry);
void appendMotionSample(MotionEntry* motionEntry,
nsecs_t eventTime, const PointerCoords* pointerCoords);
private:
Pool<InjectionState> mInjectionStatePool;
Pool<ConfigurationChangedEntry> mConfigurationChangeEntryPool;
Pool<KeyEntry> mKeyEntryPool;
Pool<MotionEntry> mMotionEntryPool;
@ -645,6 +658,7 @@ private:
Pool<CommandEntry> mCommandEntryPool;
void initializeEventEntry(EventEntry* entry, int32_t type, nsecs_t eventTime);
void releaseEventEntryInjectionState(EventEntry* entry);
};
/* Tracks dispatched key and motion event state so that cancelation events can be
@ -823,6 +837,7 @@ private:
void setInjectionResultLocked(EventEntry* entry, int32_t injectionResult);
Condition mInjectionSyncFinishedCondition;
void incrementPendingForegroundDispatchesLocked(EventEntry* entry);
void decrementPendingForegroundDispatchesLocked(EventEntry* entry);
// Throttling state.
@ -858,23 +873,37 @@ private:
// Dispatch state.
bool mDispatchEnabled;
bool mDispatchFrozen;
Vector<InputWindow> mWindows;
Vector<InputWindow*> mWallpaperWindows;
const InputWindow* getWindowLocked(const sp<InputChannel>& inputChannel);
// Focus tracking for keys, trackball, etc.
InputWindow* mFocusedWindow;
const InputWindow* mFocusedWindow;
// Focus tracking for touch.
bool mTouchDown;
InputWindow* mTouchedWindow; // primary target for current down
bool mTouchedWindowIsObscured; // true if other windows may obscure the target
Vector<InputWindow*> mTouchedWallpaperWindows; // wallpaper targets
struct OutsideTarget {
InputWindow* window;
bool obscured;
struct TouchedWindow {
const InputWindow* window;
int32_t targetFlags;
BitSet32 pointerIds;
sp<InputChannel> channel;
};
Vector<OutsideTarget> mTempTouchedOutsideTargets; // temporary outside touch targets
Vector<sp<InputChannel> > mTempTouchedWallpaperChannels; // temporary wallpaper targets
struct TouchState {
bool down;
bool split;
Vector<TouchedWindow> windows;
TouchState();
~TouchState();
void reset();
void copyFrom(const TouchState& other);
void addOrUpdateWindow(const InputWindow* window, int32_t targetFlags, BitSet32 pointerIds);
void removeOutsideTouchWindows();
const InputWindow* getFirstForegroundWindow();
};
TouchState mTouchState;
TouchState mTempTouchState;
// Focused application.
InputApplication* mFocusedApplication;
@ -899,8 +928,6 @@ private:
// The input targets that were most recently identified for dispatch.
bool mCurrentInputTargetsValid; // false while targets are being recomputed
Vector<InputTarget> mCurrentInputTargets;
int32_t mCurrentInputWindowType;
sp<InputChannel> mCurrentInputChannel;
enum InputTargetWaitCause {
INPUT_TARGET_WAIT_CAUSE_NONE,
@ -915,7 +942,7 @@ private:
// Finding targets for input events.
void resetTargetsLocked();
void commitTargetsLocked(const InputWindow* window);
void commitTargetsLocked();
int32_t handleTargetsNotReadyLocked(nsecs_t currentTime, const EventEntry* entry,
const InputApplication* application, const InputWindow* window,
nsecs_t* nextWakeupTime);
@ -924,19 +951,19 @@ private:
nsecs_t getTimeSpentWaitingForApplicationLocked(nsecs_t currentTime);
void resetANRTimeoutsLocked();
int32_t findFocusedWindowLocked(nsecs_t currentTime, const EventEntry* entry,
nsecs_t* nextWakeupTime, InputWindow** outWindow);
int32_t findTouchedWindowLocked(nsecs_t currentTime, const MotionEntry* entry,
nsecs_t* nextWakeupTime, InputWindow** outWindow);
int32_t findFocusedWindowTargetsLocked(nsecs_t currentTime, const EventEntry* entry,
nsecs_t* nextWakeupTime);
int32_t findTouchedWindowTargetsLocked(nsecs_t currentTime, const MotionEntry* entry,
nsecs_t* nextWakeupTime);
void addWindowTargetLocked(const InputWindow* window, int32_t targetFlags);
void addWindowTargetLocked(const InputWindow* window, int32_t targetFlags,
BitSet32 pointerIds);
void addMonitoringTargetsLocked();
void pokeUserActivityLocked(nsecs_t eventTime, int32_t windowType, int32_t eventType);
bool checkInjectionPermission(const InputWindow* window,
int32_t injectorPid, int32_t injectorUid);
bool shouldPokeUserActivityForCurrentInputTargetsLocked();
void pokeUserActivityLocked(nsecs_t eventTime, int32_t eventType);
bool checkInjectionPermission(const InputWindow* window, const InjectionState* injectionState);
bool isWindowObscuredLocked(const InputWindow* window);
bool isWindowFinishedWithPreviousInputLocked(const InputWindow* window);
void releaseTouchedWindowLocked();
String8 getApplicationWindowLabelLocked(const InputApplication* application,
const InputWindow* window);
@ -955,6 +982,9 @@ private:
void drainOutboundQueueLocked(Connection* connection);
static int handleReceiveCallback(int receiveFd, int events, void* data);
// Splitting motion events across windows.
MotionEntry* splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet32 pointerIds);
// Dump state.
void dumpDispatchStateLocked(String8& dump);
void logDispatchStateLocked();

4
include/ui/InputReader.h
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@ -549,10 +549,6 @@ public:
const int32_t* keyCodes, uint8_t* outFlags);
protected:
/* Maximum pointer id value supported.
* (This is limited by our use of BitSet32 to track pointer assignments.) */
static const uint32_t MAX_POINTER_ID = 31;
Mutex mLock;
struct VirtualKey {

3
include/utils/BitSet.h
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@ -38,6 +38,9 @@ struct BitSet32 {
// Clears the bit set.
inline void clear() { value = 0; }
// Returns the number of marked bits in the set.
inline uint32_t count() const { return __builtin_popcount(value); }
// Returns true if the bit set does not contain any marked bits.
inline bool isEmpty() const { return ! value; }

896
libs/ui/InputDispatcher.cpp
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File diff suppressed because it is too large Load Diff

2
libs/ui/InputReader.cpp
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@ -3366,7 +3366,7 @@ void MultiTouchInputMapper::sync(nsecs_t when) {
if (id > MAX_POINTER_ID) {
#if DEBUG_POINTERS
LOGD("Pointers: Ignoring driver provided pointer id %d because "
"it is larger than max supported id %d for optimizations",
"it is larger than max supported id %d",
id, MAX_POINTER_ID);
#endif
havePointerIds = false;