| // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import "chrome/browser/ui/cocoa/nsmenuitem_additions.h" |
| |
| #include <Carbon/Carbon.h> |
| |
| #include "base/logging.h" |
| |
| @implementation NSMenuItem(ChromeAdditions) |
| |
| - (BOOL)cr_firesForKeyEvent:(NSEvent*)event { |
| if (![self isEnabled]) |
| return NO; |
| return [self cr_firesForKeyEventIfEnabled:event]; |
| } |
| |
| - (BOOL)cr_firesForKeyEventIfEnabled:(NSEvent*)event { |
| DCHECK([event type] == NSKeyDown); |
| // In System Preferences->Keyboard->Keyboard Shortcuts, it is possible to add |
| // arbitrary keyboard shortcuts to applications. It is not documented how this |
| // works in detail, but |NSMenuItem| has a method |userKeyEquivalent| that |
| // sounds related. |
| // However, it looks like |userKeyEquivalent| is equal to |keyEquivalent| when |
| // a user shortcut is set in system preferences, i.e. Cocoa automatically |
| // sets/overwrites |keyEquivalent| as well. Hence, this method can ignore |
| // |userKeyEquivalent| and check |keyEquivalent| only. |
| |
| // Menu item key equivalents are nearly all stored without modifiers. The |
| // exception is shift, which is included in the key and not in the modifiers |
| // for printable characters (but not for stuff like arrow keys etc). |
| NSString* eventString = [event charactersIgnoringModifiers]; |
| NSUInteger eventModifiers = |
| [event modifierFlags] & NSDeviceIndependentModifierFlagsMask; |
| |
| if ([eventString length] == 0 || [[self keyEquivalent] length] == 0) |
| return NO; |
| |
| // Turns out esc never fires unless cmd or ctrl is down. |
| if ([event keyCode] == kVK_Escape && |
| (eventModifiers & (NSControlKeyMask | NSCommandKeyMask)) == 0) |
| return NO; |
| |
| // From the |NSMenuItem setKeyEquivalent:| documentation: |
| // |
| // If you want to specify the Backspace key as the key equivalent for a menu |
| // item, use a single character string with NSBackspaceCharacter (defined in |
| // NSText.h as 0x08) and for the Forward Delete key, use NSDeleteCharacter |
| // (defined in NSText.h as 0x7F). Note that these are not the same characters |
| // you get from an NSEvent key-down event when pressing those keys. |
| if ([[self keyEquivalent] characterAtIndex:0] == NSBackspaceCharacter |
| && [eventString characterAtIndex:0] == NSDeleteCharacter) { |
| unichar chr = NSBackspaceCharacter; |
| eventString = [NSString stringWithCharacters:&chr length:1]; |
| |
| // Make sure "shift" is not removed from modifiers below. |
| eventModifiers |= NSFunctionKeyMask; |
| } |
| if ([[self keyEquivalent] characterAtIndex:0] == NSDeleteCharacter && |
| [eventString characterAtIndex:0] == NSDeleteFunctionKey) { |
| unichar chr = NSDeleteCharacter; |
| eventString = [NSString stringWithCharacters:&chr length:1]; |
| |
| // Make sure "shift" is not removed from modifiers below. |
| eventModifiers |= NSFunctionKeyMask; |
| } |
| |
| // cmd-opt-a gives some weird char as characters and "a" as |
| // charactersWithoutModifiers with an US layout, but an "a" as characters and |
| // a weird char as "charactersWithoutModifiers" with a cyrillic layout. Oh, |
| // Cocoa! Instead of getting the current layout from Text Input Services, |
| // and then requesting the kTISPropertyUnicodeKeyLayoutData and looking in |
| // there, let's try a pragmatic hack. |
| if ([eventString characterAtIndex:0] > 0x7f && |
| [[event characters] length] > 0 && |
| [[event characters] characterAtIndex:0] <= 0x7f) |
| eventString = [event characters]; |
| |
| // When both |characters| and |charactersIgnoringModifiers| are ascii, we |
| // want to use |characters| if it's a character and |
| // |charactersIgnoringModifiers| else (on dvorak, cmd-shift-z should fire |
| // "cmd-:" instead of "cmd-;", but on dvorak-qwerty, cmd-shift-z should fire |
| // cmd-shift-z instead of cmd-:). |
| if ([eventString characterAtIndex:0] <= 0x7f && |
| [[event characters] length] > 0 && |
| [[event characters] characterAtIndex:0] <= 0x7f && |
| isalpha([[event characters] characterAtIndex:0])) |
| eventString = [event characters]; |
| |
| // Clear shift key for printable characters. |
| if ((eventModifiers & (NSNumericPadKeyMask | NSFunctionKeyMask)) == 0 && |
| [[self keyEquivalent] characterAtIndex:0] != '\r') |
| eventModifiers &= ~NSShiftKeyMask; |
| |
| // Clear all non-interesting modifiers |
| eventModifiers &= NSCommandKeyMask | |
| NSControlKeyMask | |
| NSAlternateKeyMask | |
| NSShiftKeyMask; |
| |
| return [eventString isEqualToString:[self keyEquivalent]] |
| && eventModifiers == [self keyEquivalentModifierMask]; |
| } |
| |
| @end |