src.native.osx.OSXInputHelpers.c Maven / Gradle / Ivy
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Global keyboard and mouse listeners for Java.
/* JNativeHook: Global keyboard and mouse hooking for Java.
* Copyright (C) 2006-2017 Alexander Barker. All Rights Received.
* https://github.com/kwhat/jnativehook/
*
* JNativeHook is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JNativeHook is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see
#include "OSXInputHelpers.h"
#ifdef COREFOUNDATION
#include
#endif
// Keyboard Upper 16 / Mouse Lower 16
static CGEventFlags currModifierMask = 0x00000000;
// Current dead key state.
#if defined(CARBON_LEGACY) || defined(COREFOUNDATION)
static UInt32 currDeadkeyState = 0;
#endif
// Input source data for the keyboard.
#if defined(CARBON_LEGACY)
static KeyboardLayoutRef previousKeyboardLayout = NULL;
#elif defined(COREFOUNDATION)
static TISInputSourceRef previousKeyboardLayout = NULL;
#endif
void SetModifierMask(CGEventFlags mask) {
currModifierMask |= mask;
}
void UnsetModifierMask(CGEventFlags mask) {
currModifierMask ^= mask;
}
CGEventFlags GetModifiers() {
return currModifierMask;
}
// This method must be executed from the main runloop to avoid the seemingly random
// Exception detected while handling key input. TSMProcessRawKeyCode failed (-192) errors.
// CFEqual(CFRunLoopGetCurrent(), CFRunLoopGetMain())
void KeyCodeToString(CGEventRef event, UniCharCount size, UniCharCount *length, UniChar *buffer) {
#if defined(CARBON_LEGACY) || defined(COREFOUNDATION)
#if defined(CARBON_LEGACY)
KeyboardLayoutRef currentKeyboardLayout;
void *inputData = NULL;
if (KLGetCurrentKeyboardLayout(¤tKeyboardLayout) == noErr) {
if (KLGetKeyboardLayoutProperty(currentKeyboardLayout, kKLuchrData, (const void **) &inputData) != noErr) {
inputData = NULL;
}
}
#elif defined(COREFOUNDATION)
TISInputSourceRef currentKeyboardLayout = TISCopyCurrentKeyboardLayoutInputSource();
CFDataRef inputData = NULL;
if (currentKeyboardLayout != NULL && CFGetTypeID(currentKeyboardLayout) == TISInputSourceGetTypeID()) {
CFDataRef data = (CFDataRef) TISGetInputSourceProperty(currentKeyboardLayout, kTISPropertyUnicodeKeyLayoutData);
if (data != NULL && CFGetTypeID(data) == CFDataGetTypeID() && CFDataGetLength(data) > 0) {
inputData = (CFDataRef) data;
}
}
// Check if the keyboard layout has changed to see if the dead key state needs to be discarded.
if (previousKeyboardLayout != NULL && currentKeyboardLayout != NULL && CFEqual(currentKeyboardLayout, previousKeyboardLayout) == false) {
currDeadkeyState = 0;
}
// Release the previous keyboard layout.
if (previousKeyboardLayout != NULL) {
CFRelease(previousKeyboardLayout);
}
// Set the previous keyboard layout to the current layout.
if (currentKeyboardLayout != NULL) {
previousKeyboardLayout = currentKeyboardLayout;
}
#endif
if (inputData != NULL) {
#ifdef CARBON_LEGACY
const UCKeyboardLayout *keyboardLayout = (const UCKeyboardLayout *) inputData;
#else
const UCKeyboardLayout *keyboardLayout = (const UCKeyboardLayout*) CFDataGetBytePtr(inputData);
#endif
if (keyboardLayout != NULL) {
//Extract keycode and modifier information.
CGKeyCode keycode = CGEventGetIntegerValueField(event, kCGKeyboardEventKeycode);
CGEventFlags modifiers = CGEventGetFlags(event);
// Disable all command modifiers for translation. This is required
// so UCKeyTranslate will provide a keysym for the separate event.
static const CGEventFlags cmdModifiers = kCGEventFlagMaskCommand | kCGEventFlagMaskControl | kCGEventFlagMaskAlternate;
modifiers &= ~cmdModifiers;
// I don't know why but UCKeyTranslate does not process the
// kCGEventFlagMaskAlphaShift (A.K.A. Caps Lock Mask) correctly.
// We need to basically turn off the mask and process the capital
// letters after UCKeyTranslate(). Think Different, not because it
// makes sense but because you want to be a hipster.
bool isCapsLock = modifiers & kCGEventFlagMaskAlphaShift;
modifiers &= ~kCGEventFlagMaskAlphaShift;
OSStatus status = noErr;
if (currDeadkeyState == 0) {
// No previous deadkey, attempt a lookup.
status = UCKeyTranslate(
keyboardLayout,
keycode,
kUCKeyActionDown,
(modifiers >> 16) & 0xFF, //(modifiers >> 16) & 0xFF, || (modifiers >> 8) & 0xFF,
LMGetKbdType(),
kNilOptions, //kNilOptions, //kUCKeyTranslateNoDeadKeysMask
&currDeadkeyState,
size,
length,
buffer);
}
else {
// The previous key was a deadkey, lookup what it should be.
status = UCKeyTranslate(
keyboardLayout,
keycode,
kUCKeyActionDown,
(modifiers >> 16) & 0xFF, //No Modifier
LMGetKbdType(),
kNilOptions, //kNilOptions, //kUCKeyTranslateNoDeadKeysMask
&currDeadkeyState,
size,
length,
buffer);
}
if (status == noErr && *length > 0) {
if (isCapsLock) {
// We *had* a caps lock mask so we need to convert to uppercase.
CFMutableStringRef keytxt = CFStringCreateMutableWithExternalCharactersNoCopy(kCFAllocatorDefault, buffer, *length, size, kCFAllocatorNull);
if (keytxt != NULL) {
CFLocaleRef locale = CFLocaleCopyCurrent();
CFStringUppercase(keytxt, locale);
CFRelease(locale);
CFRelease(keytxt);
}
else {
// There was an problem creating the CFMutableStringRef.
*length = 0;
}
}
}
else {
// Make sure the buffer length is zero if an error occurred.
*length = 0;
}
}
}
#endif
// Fallback to CGEventKeyboardGetUnicodeString if we were unable to use UCKeyTranslate().
#if defined(CARBON_LEGACY) || defined(COREFOUNDATION)
if (*length == 0) {
CGEventKeyboardGetUnicodeString(event, size, length, buffer);
}
#else
CGEventKeyboardGetUnicodeString(event, size, length, buffer);
#endif
// The following codes should not be processed because they are invalid.
// FIXME This entire function is ugly, hard to follow and needs to be reworked.
if (*length == 1) {
switch (buffer[0]) {
case 0x01: // Home
case 0x04: // End
case 0x05: // Help Key
case 0x10: // Function Keys
case 0x0B: // Page Up
case 0x0C: // Page Down
*length = 0;
}
}
}
void LoadInputHelper() {
#if defined(CARBON_LEGACY) || defined(COREFOUNDATION)
// Start with a fresh dead key state.
currDeadkeyState = 0;
#endif
}
void UnloadInputHelper() {
#if defined(CARBON_LEGACY) || defined(COREFOUNDATION)
if (previousKeyboardLayout != NULL) {
// Cleanup tracking of the previous layout.
CFRelease(previousKeyboardLayout);
}
#endif
}