Allow mapping special keys

Closes #1919. The function is from https://stackoverflow.com/questions/8263618/convert-virtual-key-code-to-unicode-string.
kovidgoyal · Aug 26, 2019 · 7a0a67e · 7a0a67e
1 parent d84e22f
commit 7a0a67e
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Showing 2 changed files with 45 additions and 1 deletion.
diff --git a/glfw/cocoa_window.m b/glfw/cocoa_window.m
@@ -31,6 +31,9 @@
 #include <float.h>
 #include <string.h>
 
+#include <CoreFoundation/CoreFoundation.h>
+#include <Carbon/Carbon.h> /* For kVK_ constants, and TIS functions. */
+
 // Needed for _NSGetProgname
 #include <crt_externs.h>
 
@@ -349,6 +352,43 @@ static int translateKey(unsigned int key, bool apply_keymap)
     return _glfw.ns.keycodes[key];
 }
 
+static NSString* keyCodeToString(CGKeyCode keyCode)
+{
+    TISInputSourceRef currentKeyboard = TISCopyCurrentKeyboardInputSource();
+    CFDataRef uchr =
+        (CFDataRef)TISGetInputSourceProperty(currentKeyboard,
+                                             kTISPropertyUnicodeKeyLayoutData);
+    const UCKeyboardLayout *keyboardLayout = (const UCKeyboardLayout*)CFDataGetBytePtr(uchr);
+
+    if (keyboardLayout) {
+        UInt32 deadKeyState = 0;
+        UniCharCount maxStringLength = 255;
+        UniCharCount actualStringLength = 0;
+        UniChar unicodeString[maxStringLength];
+
+        OSStatus status = UCKeyTranslate(keyboardLayout,
+                                         keyCode, kUCKeyActionDown, 0,
+                                         LMGetKbdType(), 0,
+                                         &deadKeyState,
+                                         maxStringLength,
+                                         &actualStringLength, unicodeString);
+
+        if (actualStringLength == 0 && deadKeyState) {
+            status = UCKeyTranslate(keyboardLayout,
+                                    kVK_Space, kUCKeyActionDown, 0,
+                                    LMGetKbdType(), 0,
+                                    &deadKeyState,
+                                    maxStringLength,
+                                    &actualStringLength, unicodeString);
+        }
+        if (actualStringLength > 0 && status == noErr)
+            return [[NSString stringWithCharacters:unicodeString
+                                            length:(NSUInteger)actualStringLength] lowercaseString];
+    }
+
+    return nil;
+}
+
 static void
 display_reconfigured(CGDirectDisplayID display UNUSED, CGDisplayChangeSummaryFlags flags, void *userInfo UNUSED)
 {
@@ -922,6 +962,10 @@ - (void)keyDown:(NSEvent *)event
     const int key = translateKey(scancode, true);
     const bool process_text = !window->ns.textInputFilterCallback || window->ns.textInputFilterCallback(key, mods, scancode, flags) != 1;
     const bool previous_has_marked_text = [self hasMarkedText];
+    NSString *key_new = keyCodeToString(scancode);
+    NSData *key_bytes = [key_new dataUsingEncoding:NSUTF8StringEncoding];
+    uint8_t *key_raw_btes = (uint8_t *)[key_bytes bytes];
+    NSLog(@">%s<\t>%lu<\t>%u<\t>%@<", _glfwGetKeyName(key), [key_new length], key_raw_btes[0], key_new);
     [self unmarkText];
     _glfw.ns.text[0] = 0;
     if (!_glfw.ns.unicodeData) {

diff --git a/glfw/glfw.py b/glfw/glfw.py
@@ -53,7 +53,7 @@ def init_env(env, pkg_config, at_least_version, test_compile, module='x11'):
             ans.ldpaths.extend(pkg_config(dep, '--libs'))
 
     elif module == 'cocoa':
-        for f in 'Cocoa IOKit CoreFoundation CoreVideo'.split():
+        for f in 'Cocoa IOKit CoreFoundation CoreVideo Carbon'.split():
             ans.ldpaths.extend(('-framework', f))
 
     elif module == 'wayland':