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// Copyright 2014 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 "content/browser/cocoa/system_hotkey_map.h"
#pragma mark - NSDictionary Helper Functions
namespace {
// All 4 following functions return nil if the object doesn't exist, or isn't of
// the right class.
id ObjectForKey(NSDictionary* dict, NSString* key, Class aClass) {
id object = [dict objectForKey:key];
if (![object isKindOfClass:aClass])
return nil;
return object;
}
NSDictionary* DictionaryForKey(NSDictionary* dict, NSString* key) {
return ObjectForKey(dict, key, [NSDictionary class]);
}
NSArray* ArrayForKey(NSDictionary* dict, NSString* key) {
return ObjectForKey(dict, key, [NSArray class]);
}
NSNumber* NumberForKey(NSDictionary* dict, NSString* key) {
return ObjectForKey(dict, key, [NSNumber class]);
}
NSString* StringForKey(NSDictionary* dict, NSString* key) {
return ObjectForKey(dict, key, [NSString class]);
}
} // namespace
#pragma mark - SystemHotkey
namespace content {
struct SystemHotkey {
unsigned short key_code;
NSUInteger modifiers;
};
#pragma mark - SystemHotkeyMap
SystemHotkeyMap::SystemHotkeyMap() {
}
SystemHotkeyMap::~SystemHotkeyMap() {
}
NSDictionary* SystemHotkeyMap::DictionaryFromData(NSData* data) {
if (!data)
return nil;
NSError* error = nil;
NSPropertyListFormat format;
NSDictionary* dictionary =
[NSPropertyListSerialization propertyListWithData:data
options:0
format:&format
error:&error];
if (![dictionary isKindOfClass:[NSDictionary class]])
return nil;
return dictionary;
}
bool SystemHotkeyMap::ParseDictionary(NSDictionary* dictionary) {
system_hotkeys_.clear();
if (!dictionary)
return false;
NSDictionary* hotkey_dictionaries =
DictionaryForKey(dictionary, @"AppleSymbolicHotKeys");
if (!hotkey_dictionaries)
return false;
for (NSString* hotkey_system_effect in [hotkey_dictionaries allKeys]) {
if (![hotkey_system_effect isKindOfClass:[NSString class]])
continue;
NSDictionary* hotkey_dictionary =
[hotkey_dictionaries objectForKey:hotkey_system_effect];
if (![hotkey_dictionary isKindOfClass:[NSDictionary class]])
continue;
NSNumber* enabled = NumberForKey(hotkey_dictionary, @"enabled");
if (!enabled || enabled.boolValue == NO)
continue;
NSDictionary* value = DictionaryForKey(hotkey_dictionary, @"value");
if (!value)
continue;
NSString* type = StringForKey(value, @"type");
if (!type || ![type isEqualToString:@"standard"])
continue;
NSArray* parameters = ArrayForKey(value, @"parameters");
if (!parameters || [parameters count] != 3)
continue;
NSNumber* key_code = [parameters objectAtIndex:1];
if (![key_code isKindOfClass:[NSNumber class]])
continue;
NSNumber* modifiers = [parameters objectAtIndex:2];
if (![modifiers isKindOfClass:[NSNumber class]])
continue;
ReserveHotkey(key_code.unsignedShortValue,
modifiers.unsignedIntegerValue,
hotkey_system_effect);
}
return true;
}
bool SystemHotkeyMap::IsEventReserved(NSEvent* event) const {
return IsHotkeyReserved(event.keyCode, event.modifierFlags);
}
bool SystemHotkeyMap::IsHotkeyReserved(unsigned short key_code,
NSUInteger modifiers) const {
modifiers &= NSDeviceIndependentModifierFlagsMask;
std::vector<SystemHotkey>::const_iterator it;
for (it = system_hotkeys_.begin(); it != system_hotkeys_.end(); ++it) {
if (it->key_code == key_code && it->modifiers == modifiers)
return true;
}
return false;
}
void SystemHotkeyMap::ReserveHotkey(unsigned short key_code,
NSUInteger modifiers,
NSString* system_effect) {
ReserveHotkey(key_code, modifiers);
// If a hotkey exists for toggling through the windows of an application, then
// adding shift to that hotkey toggles through the windows backwards.
if ([system_effect isEqualToString:@"27"])
ReserveHotkey(key_code, modifiers | NSShiftKeyMask);
}
void SystemHotkeyMap::ReserveHotkey(unsigned short key_code,
NSUInteger modifiers) {
// Hotkeys require at least one of control, command, or alternate keys to be
// down.
NSUInteger required_modifiers =
NSControlKeyMask | NSCommandKeyMask | NSAlternateKeyMask;
if ((modifiers & required_modifiers) == 0)
return;
SystemHotkey hotkey;
hotkey.key_code = key_code;
hotkey.modifiers = modifiers;
system_hotkeys_.push_back(hotkey);
}
} // namespace content
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