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JBR-4306 Robot doesn't work as expected in some cases on macOS

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(cherry picked from commits 7d69734465, 0f33031484, 3b5ded0d02)
This commit is contained in:
Dmitry Batrak
2022-03-29 18:47:32 +03:00
committed by jbrbot
parent 5a4335cb43
commit 9abf4ef397
1 changed files with 37 additions and 5 deletions
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42
src/java.desktop/macosx/native/libawt_lwawt/awt/CRobot.m
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@@ -65,6 +65,9 @@ static int* gsButtonEventNumber;
static NSTimeInterval gNextKeyEventTime;
static NSTimeInterval safeDelay;
#define KEY_CODE_COUNT 128
static CGEventFlags keyOwnFlags[KEY_CODE_COUNT];
static inline CGKeyCode GetCGKeyCode(jint javaKeyCode);
static void PostMouseEvent(const CGPoint point, CGMouseButton button,
@@ -103,6 +106,20 @@ static inline void autoDelay(BOOL isMove) {
gNextKeyEventTime = [[NSDate date] timeIntervalSinceReferenceDate] + safeDelay;
}
static void initKeyFlags() {
CGEventSourceRef source = CGEventSourceCreate(kCGEventSourceStatePrivate);
for (CGKeyCode keyCode = 0; keyCode < KEY_CODE_COUNT; keyCode++) {
CGEventRef event = CGEventCreateKeyboardEvent(source, keyCode, true);
if (event != NULL) {
keyOwnFlags[keyCode] = CGEventGetFlags(event);
CFRelease(event);
}
}
if (source != NULL) {
CFRelease(source);
}
}
/*
* Class: sun_lwawt_macosx_CRobot
* Method: initRobot
@@ -151,6 +168,8 @@ Java_sun_lwawt_macosx_CRobot_initRobot
for (i = 0; i < gNumberOfButtons; ++i) {
gsButtonEventNumber[i] = ROBOT_EVENT_NUMBER_START;
}
initKeyFlags();
}];
}
}
@@ -279,6 +298,20 @@ Java_sun_lwawt_macosx_CRobot_mouseWheel
}];
}
// CGEventCreateKeyboardEvent incorrectly handles flags pertinent to non-modifier keys
// (e.g. F1-F12 keys always Fn flag set, while arrow keys always have Fn and NumPad flags set).
// Those flags are not cleared for following key presses automatically, so we need to do it ourselves.
// See JBR-4306 for details.
static void clearStickyFlags(CGEventRef event, CGKeyCode keyCode, CGEventFlags flagToCheck) {
if (keyCode < KEY_CODE_COUNT && (keyOwnFlags[keyCode] & flagToCheck) == 0) {
CGEventFlags flags = CGEventGetFlags(event);
CGEventFlags updatedFlags = flags & ~flagToCheck;
if (updatedFlags != flags) {
CGEventSetFlags(event, updatedFlags);
}
}
}
/*
* Class: sun_lwawt_macosx_CRobot
* Method: keyEvent
@@ -294,11 +327,10 @@ Java_sun_lwawt_macosx_CRobot_keyEvent
CGKeyCode keyCode = GetCGKeyCode(javaKeyCode);
CGEventRef event = CGEventCreateKeyboardEvent(source, keyCode, keyPressed);
if (event != NULL) {
CGEventFlags flags = CGEventSourceFlagsState(kCGEventSourceStateHIDSystemState);
if ((flags & kCGEventFlagMaskSecondaryFn) != 0) {
flags ^= kCGEventFlagMaskSecondaryFn;
CGEventSetFlags(event, flags);
}
// this assumes Robot isn't used to generate Fn key presses
clearStickyFlags(event, keyCode, kCGEventFlagMaskSecondaryFn);
// there is no NumPad key, so this won't hurt in any case
clearStickyFlags(event, keyCode, kCGEventFlagMaskNumericPad);
CGEventPost(kCGHIDEventTap, event);
CFRelease(event);
}