betajs-browser
Version:
BetaJS-Browser is a client-side JavaScript framework for Browser-specific methods.
190 lines (173 loc) • 5.59 kB
JavaScript
/*
* Uses modified portions of:
*
* http://www.openjs.com/scripts/events/keyboard_shortcuts/
* Version : 2.01.B
* By Binny V A
* License : BSD
*/
Scoped.define("module:Hotkeys", [
"base:Objs"
], function(Objs) {
return {
SHIFT_NUMS: {
"`": "~",
"1": "!",
"2": "@",
"3": "#",
"4": "$",
"5": "%",
"6": "^",
"7": "&",
"8": "*",
"9": "(",
"0": ")",
"-": "_",
"=": "+",
";": ":",
"'": "\"",
",": "<",
".": ">",
"/": "?",
"\\": "|"
},
SPECIAL_KEYS: {
'esc': 27,
'escape': 27,
'tab': 9,
'space': 32,
'return': 13,
'enter': 13,
'backspace': 8,
'scrolllock': 145,
'scroll_lock': 145,
'scroll': 145,
'capslock': 20,
'caps_lock': 20,
'caps': 20,
'numlock': 144,
'num_lock': 144,
'num': 144,
'pause': 19,
'break': 19,
'insert': 45,
'home': 36,
'delete': 46,
'end': 35,
'pageup': 33,
'page_up': 33,
'pu': 33,
'pagedown': 34,
'page_down': 34,
'pd': 34,
'left': 37,
'up': 38,
'right': 39,
'down': 40,
'f1': 112,
'f2': 113,
'f3': 114,
'f4': 115,
'f5': 116,
'f6': 117,
'f7': 118,
'f8': 119,
'f9': 120,
'f10': 121,
'f11': 122,
'f12': 123
},
MODIFIERS: ["ctrl", "alt", "shift", "meta"],
keyCodeToCharacter: function(code) {
if (code == 188)
return ",";
else if (code == 190)
return ".";
return String.fromCharCode(code).toLowerCase();
},
handleKeyEvent: function(hotkey, e, options) {
options = Objs.extend({
"disable_in_input": false,
"keycode": false
}, options);
var keys = hotkey.toLowerCase().split("+");
if (options.disable_in_input) {
var element = e.target || e.srcElement || null;
if (element && element.nodeType == 3)
element = element.parentNode;
if (element && (element.tagName == 'INPUT' || element.tagName == 'TEXTAREA'))
return false;
}
var code = e.keyCode || e.which || 0;
var character = this.keyCodeToCharacter(code);
var kp = 0;
var modifier_map = {};
Objs.iter(this.MODIFIERS, function(mod) {
modifier_map[mod] = {
pressed: e[mod + "Key"],
wanted: false
};
}, this);
Objs.iter(keys, function(key) {
if (key in modifier_map) {
modifier_map[key].wanted = true;
kp++;
} else if (key.length > 1) {
if (this.SPECIAL_KEYS[key] == code)
kp++;
} else if (options.keycode) {
if (options.keycode == code)
kp++;
} else if (character == key || (e.shiftKey && this.SHIFT_NUMS[character] == key)) {
kp++;
}
}, this);
/**
* Allow to use use several keys for one action
* @example: ba-hotkey:space^enter="function(){}"
*/
var multipleKeys = hotkey.toLowerCase().split("^");
if (multipleKeys.length > 1) {
Objs.iter(multipleKeys, function(key) {
if (key.length > 1 && e.keyCode === this.SPECIAL_KEYS[key]) {
// Prevent browser scroll when press space
if (code === 32) e.preventDefault();
if (this.SPECIAL_KEYS[key] == code)
kp++;
}
}, this);
}
return kp == keys.length && Objs.all(modifier_map, function(data) {
return data.wanted == data.pressed;
});
},
register: function(hotkey, callback, context, options) {
options = Objs.extend({
"type": "keyup",
"propagate": false,
"disable_in_input": false,
"target": document,
"keycode": false
}, options);
var self = this;
var func = function(e) {
if (self.handleKeyEvent(hotkey, e, options)) {
if (!options.propagate) {
e.preventDefault();
e.stopPropagation();
}
callback.call(context || this, e);
}
};
options.target.addEventListener(options.type, func, false);
return {
target: options.target,
type: options.type,
func: func
};
},
unregister: function(handle) {
handle.target.removeEventListener(handle.type, handle.func, false);
}
};
});