XQuartz: Add a defaults option to toggle Alt / Mode_switch

See option_sends_alt in Xquartz(1)

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Kevin Van Vechten <kvv@apple.com>
(cherry picked from commit 840d12c7a6ac6a974da185045215ce944a61fab6)

9 files changed, 104 insertions, 64 deletions

diff --git a/hw/xquartz/X11Application.h b/hw/xquartz/X11Application.h
index d7e9a5fa5..ce19e034a 100644
--- a/hw/xquartz/X11Application.h
+++ b/hw/xquartz/X11Application.h
@@ -90,6 +90,7 @@ extern int quartzHasRoot, quartzEnableRootless, quartzFullscreenMenu;
 #define PREFS_NO_TCP                "nolisten_tcp"
 #define PREFS_DONE_XINIT_CHECK      "done_xinit_check"
 #define PREFS_NO_QUIT_ALERT         "no_quit_alert"
+#define PREFS_OPTION_SENDS_ALT      "option_sends_alt"
 #define PREFS_FAKE_BUTTON2          "fake_button2"
 #define PREFS_FAKE_BUTTON3          "fake_button3"
 #define PREFS_APPKIT_MODIFIERS      "appkit_modifiers"
diff --git a/hw/xquartz/X11Application.m b/hw/xquartz/X11Application.m
index 54066404e..c9a0d669f 100644
--- a/hw/xquartz/X11Application.m
+++ b/hw/xquartz/X11Application.m
@@ -712,10 +712,13 @@ static NSMutableArray * cfarray_to_nsarray (CFArrayRef in) {
                                            default:quartzEnableRootless];
     quartzFullscreenMenu = [self prefs_get_boolean:@PREFS_FULLSCREEN_MENU
                                            default:quartzFullscreenMenu];
-    quartzFullscreenDisableHotkeys = ![self prefs_get_boolean:
-                            @PREFS_FULLSCREEN_HOTKEYS default:!quartzFullscreenDisableHotkeys];
+    quartzFullscreenDisableHotkeys = ![self prefs_get_boolean:@PREFS_FULLSCREEN_HOTKEYS
+                                                      default:!quartzFullscreenDisableHotkeys];
     darwinFakeButtons = [self prefs_get_boolean:@PREFS_FAKEBUTTONS
                                         default:darwinFakeButtons];
+    quartzOptionSendsAlt = [self prefs_get_boolean:@PREFS_OPTION_SENDS_ALT
+                                           default:quartzOptionSendsAlt];
+
     if (darwinFakeButtons) {
         const char *fake2, *fake3;
 
@@ -969,8 +972,7 @@ void X11ApplicationMain (int argc, char **argv, char **envp) {
         fprintf(stderr, "X11ApplicationMain: Unable to determine KLGetCurrentKeyboardLayout() at startup.\n");
 #endif
 
-    memset(keyInfo.keyMap, 0, sizeof(keyInfo.keyMap));
-    if (!QuartzReadSystemKeymap(&keyInfo)) {
+    if (!QuartsResyncKeymap(FALSE)) {
         fprintf(stderr, "X11ApplicationMain: Could not build a valid keymap.\n");
     }
 
@@ -1229,17 +1231,10 @@ static inline int ensure_flag(int flags, int device_independent, int device_depe
                 if(key_layout != last_key_layout) {
                     last_key_layout = key_layout;
 #endif
-
                     /* Update keyInfo */
-                    pthread_mutex_lock(&keyInfo_mutex);
-                    memset(keyInfo.keyMap, 0, sizeof(keyInfo.keyMap));
-                    if (!QuartzReadSystemKeymap(&keyInfo)) {
+                    if (!QuartsResyncKeymap(TRUE)) {
                         fprintf(stderr, "sendX11NSEvent: Could not build a valid keymap.\n");
                     }
-                    pthread_mutex_unlock(&keyInfo_mutex);
-                    
-                    /* Tell server thread to deal with new keyInfo */
-                    DarwinSendDDXEvent(kXquartzReloadKeymap, 0);
                 }
             }
 
diff --git a/hw/xquartz/X11Controller.h b/hw/xquartz/X11Controller.h
index 9e16f75ce..a2024dfac 100644
--- a/hw/xquartz/X11Controller.h
+++ b/hw/xquartz/X11Controller.h
@@ -69,6 +69,7 @@ typedef unsigned int NSUInteger;
     IBOutlet NSButton *use_sysbeep;
     IBOutlet NSButton *enable_keyequivs;
     IBOutlet NSButton *sync_keymap;
+    IBOutlet NSButton *option_sends_alt;
     IBOutlet NSButton *click_through;
     IBOutlet NSButton *focus_follows_mouse;
     IBOutlet NSButton *focus_on_new_window;
diff --git a/hw/xquartz/X11Controller.m b/hw/xquartz/X11Controller.m
index b28f4d303..d66d039b0 100644
--- a/hw/xquartz/X11Controller.m
+++ b/hw/xquartz/X11Controller.m
@@ -43,6 +43,7 @@
 #include "darwin.h"
 #include "darwinEvents.h"
 #include "quartz.h"
+#include "quartzKeyboard.h"
 #include <X11/extensions/applewmconst.h>
 #include "applewmExt.h"
 
@@ -630,49 +631,69 @@ objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
 
 - (IBAction)prefs_changed:sender
 {
-    BOOL pbproxy_active;
-
-    darwinFakeButtons = [fake_buttons intValue];
-    quartzUseSysBeep = [use_sysbeep intValue];
-    X11EnableKeyEquivalents = [enable_keyequivs intValue];
-    darwinSyncKeymap = [sync_keymap intValue];
-    quartzFullscreenMenu = [enable_fullscreen_menu intValue];
-
-    /* after adding prefs here, also add to [X11Application read_defaults]
-     and prefs_show */
-
-    [NSApp prefs_set_boolean:@PREFS_FAKEBUTTONS value:darwinFakeButtons];
-    [NSApp prefs_set_boolean:@PREFS_SYSBEEP value:quartzUseSysBeep];
-    [NSApp prefs_set_boolean:@PREFS_KEYEQUIVS value:X11EnableKeyEquivalents];
-    [NSApp prefs_set_boolean:@PREFS_SYNC_KEYMAP value:darwinSyncKeymap];
-    [NSApp prefs_set_boolean:@PREFS_FULLSCREEN_MENU value:quartzFullscreenMenu];
-    [NSApp prefs_set_boolean:@PREFS_CLICK_THROUGH value:[click_through intValue]];
-    [NSApp prefs_set_boolean:@PREFS_FFM value:[focus_follows_mouse intValue]];
-    [NSApp prefs_set_boolean:@PREFS_FOCUS_ON_NEW_WINDOW value:[focus_on_new_window intValue]];
-    [NSApp prefs_set_boolean:@PREFS_NO_AUTH value:![enable_auth intValue]];
-    [NSApp prefs_set_boolean:@PREFS_NO_TCP value:![enable_tcp intValue]];
-    [NSApp prefs_set_integer:@PREFS_DEPTH value:[depth selectedTag]];
-
-    pbproxy_active = [sync_pasteboard intValue];
-
-    [NSApp prefs_set_boolean:@PREFS_SYNC_PB value:pbproxy_active];
-    [NSApp prefs_set_boolean:@PREFS_SYNC_PB_TO_CLIPBOARD value:[sync_pasteboard_to_clipboard intValue]];
-    [NSApp prefs_set_boolean:@PREFS_SYNC_PB_TO_PRIMARY value:[sync_pasteboard_to_primary intValue]];
-    [NSApp prefs_set_boolean:@PREFS_SYNC_CLIPBOARD_TO_PB value:[sync_clipboard_to_pasteboard intValue]];
-    [NSApp prefs_set_boolean:@PREFS_SYNC_PRIMARY_ON_SELECT value:[sync_primary_immediately intValue]];
+    if(!sender)
+        return;
+    
+    if(sender == fake_buttons) {
+        darwinFakeButtons = [fake_buttons intValue];
+        [NSApp prefs_set_boolean:@PREFS_FAKEBUTTONS value:darwinFakeButtons];
+    } else if(sender == use_sysbeep) {
+        quartzUseSysBeep = [use_sysbeep intValue];
+        [NSApp prefs_set_boolean:@PREFS_SYSBEEP value:quartzUseSysBeep];
+    } else if(sender == enable_keyequivs) {
+        X11EnableKeyEquivalents =  [enable_keyequivs intValue];
+        [NSApp prefs_set_boolean:@PREFS_KEYEQUIVS value:X11EnableKeyEquivalents];
+    } else if(sender == sync_keymap) {
+        darwinSyncKeymap = [sync_keymap intValue];
+        [NSApp prefs_set_boolean:@PREFS_SYNC_KEYMAP value:darwinSyncKeymap];
+    } else if(sender == enable_fullscreen_menu) {
+        quartzFullscreenMenu = [enable_fullscreen_menu intValue];
+        [NSApp prefs_set_boolean:@PREFS_FULLSCREEN_MENU value:quartzFullscreenMenu];
+    } else if(sender == option_sends_alt) {
+        BOOL prev_opt_sends_alt = quartzOptionSendsAlt;
+        
+        quartzOptionSendsAlt = [option_sends_alt intValue];
+        [NSApp prefs_set_boolean:@PREFS_OPTION_SENDS_ALT value:quartzOptionSendsAlt];
+
+        if(prev_opt_sends_alt != quartzOptionSendsAlt)
+            QuartsResyncKeymap(TRUE);
+    } else if(sender == click_through) {
+        [NSApp prefs_set_boolean:@PREFS_CLICK_THROUGH value:[click_through intValue]];
+    } else if(sender == focus_follows_mouse) {
+        [NSApp prefs_set_boolean:@PREFS_FFM value:[focus_follows_mouse intValue]];
+    } else if(sender == focus_on_new_window) {
+        [NSApp prefs_set_boolean:@PREFS_FOCUS_ON_NEW_WINDOW value:[focus_on_new_window intValue]];
+    } else if(sender == enable_auth) {
+        [NSApp prefs_set_boolean:@PREFS_NO_AUTH value:![enable_auth intValue]];
+    } else if(sender == enable_tcp) {
+        [NSApp prefs_set_boolean:@PREFS_NO_TCP value:![enable_tcp intValue]];
+    } else if(sender == depth) {
+        [NSApp prefs_set_integer:@PREFS_DEPTH value:[depth selectedTag]];
+    } else if(sender == sync_pasteboard) {
+        BOOL pbproxy_active = [sync_pasteboard intValue];
+        [NSApp prefs_set_boolean:@PREFS_SYNC_PB value:pbproxy_active];
+
+        [sync_pasteboard_to_clipboard setEnabled:pbproxy_active];
+        [sync_pasteboard_to_primary setEnabled:pbproxy_active];
+        [sync_clipboard_to_pasteboard setEnabled:pbproxy_active];
+        [sync_primary_immediately setEnabled:pbproxy_active];
+
+        // setEnabled doesn't do this...
+        [sync_text1 setTextColor:pbproxy_active ? [NSColor controlTextColor] : [NSColor disabledControlTextColor]];
+        [sync_text2 setTextColor:pbproxy_active ? [NSColor controlTextColor] : [NSColor disabledControlTextColor]];
+    } else if(sender == sync_pasteboard_to_clipboard) {
+        [NSApp prefs_set_boolean:@PREFS_SYNC_PB_TO_CLIPBOARD value:[sync_pasteboard_to_clipboard intValue]];
+    } else if(sender == sync_pasteboard_to_primary) {
+        [NSApp prefs_set_boolean:@PREFS_SYNC_PB_TO_PRIMARY value:[sync_pasteboard_to_primary intValue]];
+    } else if(sender == sync_clipboard_to_pasteboard) {
+        [NSApp prefs_set_boolean:@PREFS_SYNC_CLIPBOARD_TO_PB value:[sync_clipboard_to_pasteboard intValue]];
+    } else if(sender == sync_primary_immediately) {
+        [NSApp prefs_set_boolean:@PREFS_SYNC_PRIMARY_ON_SELECT value:[sync_primary_immediately intValue]];
+    }
 
     [NSApp prefs_synchronize];
-
-    [sync_pasteboard_to_clipboard setEnabled:pbproxy_active];
-    [sync_pasteboard_to_primary setEnabled:pbproxy_active];
-    [sync_clipboard_to_pasteboard setEnabled:pbproxy_active];
-    [sync_primary_immediately setEnabled:pbproxy_active];
-    
-    // setEnabled doesn't do this...
-    [sync_text1 setTextColor:pbproxy_active ? [NSColor controlTextColor] : [NSColor disabledControlTextColor]];
-    [sync_text2 setTextColor:pbproxy_active ? [NSColor controlTextColor] : [NSColor disabledControlTextColor]];
     
-	DarwinSendDDXEvent(kXquartzReloadPreferences, 0);
+    DarwinSendDDXEvent(kXquartzReloadPreferences, 0);
 }
 
 - (IBAction) prefs_show:sender
@@ -683,6 +704,7 @@ objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
     [use_sysbeep setIntValue:quartzUseSysBeep];
     [enable_keyequivs setIntValue:X11EnableKeyEquivalents];
     [sync_keymap setIntValue:darwinSyncKeymap];
+    [option_sends_alt setIntValue:quartzOptionSendsAlt];
     [click_through setIntValue:[NSApp prefs_get_boolean:@PREFS_CLICK_THROUGH default:NO]];
     [focus_follows_mouse setIntValue:[NSApp prefs_get_boolean:@PREFS_FFM default:NO]];
     [focus_on_new_window setIntValue:[NSApp prefs_get_boolean:@PREFS_FOCUS_ON_NEW_WINDOW default:YES]];
diff --git a/hw/xquartz/doc/Xquartz.man.pre b/hw/xquartz/doc/Xquartz.man.pre
index 04bbee30c..e54be9601 100644
--- a/hw/xquartz/doc/Xquartz.man.pre
+++ b/hw/xquartz/doc/Xquartz.man.pre
@@ -63,6 +63,9 @@ defaults to the depth of the main display.
 .B defaults write org.x.X11 sync_keymap -boolean true
 Keep the X11 keymap up to date with the OSX system keymap.
 .TP 8
+.B defaults write org.x.X11 option_sends_alt -boolean true
+The Option key will send Alt_L and Alt_R instead of Mode_switch.
+.TP 8
 .B defaults write org.x.X11 sync_pasteboard -boolean true
 Enable syncing between the OSX pasteboard and clipboard/primary selection buffers in X11.  This option needs to be true for any of the other pasteboard sync options to have an effect.
 .TP 8
diff --git a/hw/xquartz/quartz.c b/hw/xquartz/quartz.c
index a611854e7..a8c0d4b47 100644
--- a/hw/xquartz/quartz.c
+++ b/hw/xquartz/quartz.c
@@ -79,6 +79,7 @@ int                     aquaMenuBarHeight = 0;
 QuartzModeProcsPtr      quartzProcs = NULL;
 const char             *quartzOpenGLBundle = NULL;
 int                     quartzFullscreenDisableHotkeys = TRUE;
+int                     quartzOptionSendsAlt = FALSE;
 
 #if defined(RANDR) && !defined(FAKE_RANDR)
 Bool QuartzRandRGetInfo (ScreenPtr pScreen, Rotation *rotations) {
diff --git a/hw/xquartz/quartzCommon.h b/hw/xquartz/quartzCommon.h
index 1c0eeba9c..8ab70f22a 100644
--- a/hw/xquartz/quartzCommon.h
+++ b/hw/xquartz/quartzCommon.h
@@ -60,6 +60,7 @@ extern int              focusOnNewWindow;
 extern int              quartzUseAGL;
 extern int              quartzEnableKeyEquivalents;
 extern int              quartzFullscreenDisableHotkeys;
+extern int              quartzOptionSendsAlt;
 
 // Other shared data
 extern int              quartzServerVisible;
diff --git a/hw/xquartz/quartzKeyboard.c b/hw/xquartz/quartzKeyboard.c
index db4df891e..745333f03 100644
--- a/hw/xquartz/quartzKeyboard.c
+++ b/hw/xquartz/quartzKeyboard.c
@@ -50,6 +50,7 @@
 
 #include "quartzCommon.h"
 #include "darwin.h"
+#include "darwinEvents.h"
 
 #include "quartzKeyboard.h"
 #include "quartzAudio.h"
@@ -191,6 +192,12 @@ const static struct {
     {UKEYSYM (0x31b), XK_dead_horn},		/* COMBINING HORN */
 };
 
+typedef struct darwinKeyboardInfo_struct {
+    CARD8 modMap[MAP_LENGTH];
+    KeySym keyMap[MAP_LENGTH * GLYPHS_PER_KEY];
+    unsigned char modifierKeycodes[32][2];
+} darwinKeyboardInfo;
+
 darwinKeyboardInfo keyInfo;
 pthread_mutex_t keyInfo_mutex = PTHREAD_MUTEX_INITIALIZER;
 
@@ -255,7 +262,8 @@ static void DarwinBuildModifierMaps(darwinKeyboardInfo *info) {
             case XK_Alt_L:
                 info->modifierKeycodes[NX_MODIFIERKEY_ALTERNATE][0] = i;
                 info->modMap[MIN_KEYCODE + i] = Mod1Mask;
-                *k = XK_Mode_switch; // Yes, this is ugly.  This needs to be cleaned up when we integrate quartzKeyboard with this code and refactor.
+                if(!quartzOptionSendsAlt)
+                    *k = XK_Mode_switch; // Yes, this is ugly.  This needs to be cleaned up when we integrate quartzKeyboard with this code and refactor.
                 break;
 
             case XK_Alt_R:
@@ -264,7 +272,8 @@ static void DarwinBuildModifierMaps(darwinKeyboardInfo *info) {
 #else
                 info->modifierKeycodes[NX_MODIFIERKEY_ALTERNATE][0] = i;
 #endif
-                *k = XK_Mode_switch; // Yes, this is ugly.  This needs to be cleaned up when we integrate quartzKeyboard with this code and refactor.
+                if(!quartzOptionSendsAlt)
+                    *k = XK_Mode_switch; // Yes, this is ugly.  This needs to be cleaned up when we integrate quartzKeyboard with this code and refactor.
                 info->modMap[MIN_KEYCODE + i] = Mod1Mask;
                 break;
 
@@ -647,7 +656,7 @@ static KeySym make_dead_key(KeySym in) {
     return in;
 }
 
-Bool QuartzReadSystemKeymap(darwinKeyboardInfo *info) {
+static Bool QuartzReadSystemKeymap(darwinKeyboardInfo *info) {
 #if !defined(__LP64__) || MAC_OS_X_VERSION_MIN_REQUIRED < 1050
     KeyboardLayoutRef key_layout;
     int is_uchr = 1;
@@ -824,3 +833,18 @@ Bool QuartzReadSystemKeymap(darwinKeyboardInfo *info) {
 
     return TRUE;
 }
+
+Bool QuartsResyncKeymap(Bool sendDDXEvent) {
+    Bool retval;
+    /* Update keyInfo */
+    pthread_mutex_lock(&keyInfo_mutex);
+    memset(keyInfo.keyMap, 0, sizeof(keyInfo.keyMap));
+    retval = QuartzReadSystemKeymap(&keyInfo);
+    pthread_mutex_unlock(&keyInfo_mutex);
+
+    /* Tell server thread to deal with new keyInfo */
+    if(sendDDXEvent)
+        DarwinSendDDXEvent(kXquartzReloadKeymap, 0);
+
+    return retval;
+}
diff --git a/hw/xquartz/quartzKeyboard.h b/hw/xquartz/quartzKeyboard.h
index 1aaec6ef2..1151a0035 100644
--- a/hw/xquartz/quartzKeyboard.h
+++ b/hw/xquartz/quartzKeyboard.h
@@ -41,18 +41,10 @@
 #define MIN_KEYCODE     XkbMinLegalKeyCode     // unfortunately, this isn't 0...
 #define MAX_KEYCODE     NUM_KEYCODES + MIN_KEYCODE - 1
 
-typedef struct darwinKeyboardInfo_struct {
-    CARD8 modMap[MAP_LENGTH];
-    KeySym keyMap[MAP_LENGTH * GLYPHS_PER_KEY];
-    unsigned char modifierKeycodes[32][2];
-} darwinKeyboardInfo;
-
 /* These functions need to be implemented by Xquartz, XDarwin, etc. */
-Bool QuartzReadSystemKeymap(darwinKeyboardInfo *info);
+Bool QuartsResyncKeymap(Bool sendDDXEvent);
 
 /* Provided for darwinEvents.c */
-extern darwinKeyboardInfo keyInfo;
-extern pthread_mutex_t keyInfo_mutex;
 void DarwinKeyboardReloadHandler(void);
 int DarwinModifierNXKeycodeToNXKey(unsigned char keycode, int *outSide);
 int DarwinModifierNXKeyToNXKeycode(int key, int side);