osx: create macosx_events to deal with keyDown events

On OSX with Cocoa enabled keyDown events are now handled with
addLocalMonitorForEventsMatchingMask:handler:. This allows to respond to
events even when there is no VO initialized but the GUI is focused.

1 files changed, 141 insertions, 0 deletions

diff --git a/osdep/macosx_events.m b/osdep/macosx_events.m
new file mode 100644
index 0000000000..434fc0cb3b
--- /dev/null
+++ b/osdep/macosx_events.m
@@ -0,0 +1,141 @@
+/*
+ * Cocoa Application Event Handling
+ *
+ * This file is part of mpv.
+ *
+ * mplayer2 is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mplayer2 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 General Public License along
+ * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// Carbon header is included but Carbon is NOT linked to mpv's binary. This
+// file only needs this include to use the keycode definitions in keymap.
+#import <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+
+#include "talloc.h"
+#include "core/input/input.h"
+#include "core/mp_fifo.h"
+// doesn't make much sense, but needed to access keymap functionality
+#include "video/out/vo.h"
+#include "osdep/macosx_events.h"
+#import  "osdep/macosx_application_objc.h"
+
+#define NSLeftAlternateKeyMask  (0x000020 | NSAlternateKeyMask)
+#define NSRightAlternateKeyMask (0x000040 | NSAlternateKeyMask)
+
+static bool LeftAltPressed(NSEvent *event)
+{
+    return ([event modifierFlags] & NSLeftAlternateKeyMask) ==
+            NSLeftAlternateKeyMask;
+}
+
+static bool RightAltPressed(NSEvent *event)
+{
+    return ([event modifierFlags] & NSRightAlternateKeyMask) ==
+            NSRightAlternateKeyMask;
+}
+
+static const struct mp_keymap keymap[] = {
+    // special keys
+    {kVK_Return, MP_KEY_ENTER}, {kVK_Escape, MP_KEY_ESC},
+    {kVK_Delete, MP_KEY_BACKSPACE}, {kVK_Option, MP_KEY_BACKSPACE},
+    {kVK_Control, MP_KEY_BACKSPACE}, {kVK_Shift, MP_KEY_BACKSPACE},
+    {kVK_Tab, MP_KEY_TAB},
+
+    // cursor keys
+    {kVK_UpArrow, MP_KEY_UP}, {kVK_DownArrow, MP_KEY_DOWN},
+    {kVK_LeftArrow, MP_KEY_LEFT}, {kVK_RightArrow, MP_KEY_RIGHT},
+
+    // navigation block
+    {kVK_Help, MP_KEY_INSERT}, {kVK_ForwardDelete, MP_KEY_DELETE},
+    {kVK_Home, MP_KEY_HOME}, {kVK_End, MP_KEY_END},
+    {kVK_PageUp, MP_KEY_PAGE_UP}, {kVK_PageDown, MP_KEY_PAGE_DOWN},
+
+    // F-keys
+    {kVK_F1, MP_KEY_F + 1}, {kVK_F2, MP_KEY_F + 2}, {kVK_F3, MP_KEY_F + 3},
+    {kVK_F4, MP_KEY_F + 4}, {kVK_F5, MP_KEY_F + 5}, {kVK_F6, MP_KEY_F + 6},
+    {kVK_F7, MP_KEY_F + 7}, {kVK_F8, MP_KEY_F + 8}, {kVK_F9, MP_KEY_F + 9},
+    {kVK_F10, MP_KEY_F + 10}, {kVK_F11, MP_KEY_F + 11}, {kVK_F12, MP_KEY_F + 12},
+
+    // numpad
+    {kVK_ANSI_KeypadPlus, '+'}, {kVK_ANSI_KeypadMinus, '-'},
+    {kVK_ANSI_KeypadMultiply, '*'}, {kVK_ANSI_KeypadDivide, '/'},
+    {kVK_ANSI_KeypadEnter, MP_KEY_KPENTER},
+    {kVK_ANSI_KeypadDecimal, MP_KEY_KPDEC},
+    {kVK_ANSI_Keypad0, MP_KEY_KP0}, {kVK_ANSI_Keypad1, MP_KEY_KP1},
+    {kVK_ANSI_Keypad2, MP_KEY_KP2}, {kVK_ANSI_Keypad3, MP_KEY_KP3},
+    {kVK_ANSI_Keypad4, MP_KEY_KP4}, {kVK_ANSI_Keypad5, MP_KEY_KP5},
+    {kVK_ANSI_Keypad6, MP_KEY_KP6}, {kVK_ANSI_Keypad7, MP_KEY_KP7},
+    {kVK_ANSI_Keypad8, MP_KEY_KP8}, {kVK_ANSI_Keypad9, MP_KEY_KP9},
+
+    {0, 0}
+};
+
+static int convert_key(unsigned key, unsigned charcode)
+{
+    int mpkey = lookup_keymap_table(keymap, key);
+    if (mpkey)
+        return mpkey;
+    return charcode;
+}
+
+void cocoa_check_events(void)
+{
+    Application *app = mpv_shared_app();
+    int key = [app.iqueue pop];
+    if (key >= 0) mplayer_put_key(app.keyFIFO, key);
+}
+
+void cocoa_put_key(int keycode)
+{
+    [mpv_shared_app().iqueue push:keycode];
+}
+
+@implementation EventsResponder
+- (NSArray *) keyEquivalents
+{
+    return @[@"h", @"q", @"Q", @"0", @"1", @"2"];
+}
+- (NSEvent*)handleKeyDown:(NSEvent *)event
+{
+    NSString *chars;
+
+    if (RightAltPressed(event))
+        chars = [event characters];
+    else
+        chars = [event charactersIgnoringModifiers];
+
+    int key = convert_key([event keyCode], *[chars UTF8String]);
+
+    if (key > -1) {
+        if ([event modifierFlags] & NSShiftKeyMask)
+            key |= MP_KEY_MODIFIER_SHIFT;
+        if ([event modifierFlags] & NSControlKeyMask)
+            key |= MP_KEY_MODIFIER_CTRL;
+        if (LeftAltPressed(event))
+            key |= MP_KEY_MODIFIER_ALT;
+        if ([event modifierFlags] & NSCommandKeyMask) {
+            // propagate the event in case this is a menu key equivalent
+            for(NSString *c in [self keyEquivalents])
+                if ([chars isEqualToString:c])
+                    return event;
+
+            key |= MP_KEY_MODIFIER_META;
+        }
+
+        cocoa_put_key(key);
+    }
+
+    return nil;
+}
+@end