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/***
MochiKit.Signal 1.4
(c) 2006 Jonathan Gardner, Beau Hartshorne, Bob Ippolito. All rights Reserved.
***/
if (typeof(dojo) != 'undefined') {
dojo.provide('MochiKit.Signal');
dojo.require('MochiKit.Base');
dojo.require('MochiKit.DOM');
dojo.require('MochiKit.Style');
}
if (typeof(JSAN) != 'undefined') {
JSAN.use('MochiKit.Base', []);
JSAN.use('MochiKit.DOM', []);
JSAN.use('MochiKit.Style', []);
}
try {
if (typeof(MochiKit.Base) == 'undefined') {
throw '';
}
} catch (e) {
throw 'MochiKit.Signal depends on MochiKit.Base!';
}
try {
if (typeof(MochiKit.DOM) == 'undefined') {
throw '';
}
} catch (e) {
throw 'MochiKit.Signal depends on MochiKit.DOM!';
}
try {
if (typeof(MochiKit.Style) == 'undefined') {
throw '';
}
} catch (e) {
throw 'MochiKit.Signal depends on MochiKit.Style!';
}
if (typeof(MochiKit.Signal) == 'undefined') {
MochiKit.Signal = {};
}
MochiKit.Signal.NAME = 'MochiKit.Signal';
MochiKit.Signal.VERSION = '1.4';
MochiKit.Signal._observers = [];
/** @id MochiKit.Signal.Event */
MochiKit.Signal.Event = function (src, e) {
this._event = e || window.event;
this._src = src;
};
MochiKit.Base.update(MochiKit.Signal.Event.prototype, {
__repr__: function () {
var repr = MochiKit.Base.repr;
var str = '{event(): ' + repr(this.event()) +
', src(): ' + repr(this.src()) +
', type(): ' + repr(this.type()) +
', target(): ' + repr(this.target());
if (this.type() &&
this.type().indexOf('key') === 0 ||
this.type().indexOf('mouse') === 0 ||
this.type().indexOf('click') != -1 ||
this.type() == 'contextmenu') {
str += ', modifier(): ' + '{alt: ' + repr(this.modifier().alt) +
', ctrl: ' + repr(this.modifier().ctrl) +
', meta: ' + repr(this.modifier().meta) +
', shift: ' + repr(this.modifier().shift) +
', any: ' + repr(this.modifier().any) + '}';
}
if (this.type() && this.type().indexOf('key') === 0) {
str += ', key(): {code: ' + repr(this.key().code) +
', string: ' + repr(this.key().string) + '}';
}
if (this.type() && (
this.type().indexOf('mouse') === 0 ||
this.type().indexOf('click') != -1 ||
this.type() == 'contextmenu')) {
str += ', mouse(): {page: ' + repr(this.mouse().page) +
', client: ' + repr(this.mouse().client);
if (this.type() != 'mousemove') {
str += ', button: {left: ' + repr(this.mouse().button.left) +
', middle: ' + repr(this.mouse().button.middle) +
', right: ' + repr(this.mouse().button.right) + '}}';
} else {
str += '}';
}
}
if (this.type() == 'mouseover' || this.type() == 'mouseout') {
str += ', relatedTarget(): ' + repr(this.relatedTarget());
}
str += '}';
return str;
},
/** @id MochiKit.Signal.Event.prototype.toString */
toString: function () {
return this.__repr__();
},
/** @id MochiKit.Signal.Event.prototype.src */
src: function () {
return this._src;
},
/** @id MochiKit.Signal.Event.prototype.event */
event: function () {
return this._event;
},
/** @id MochiKit.Signal.Event.prototype.type */
type: function () {
return this._event.type || undefined;
},
/** @id MochiKit.Signal.Event.prototype.target */
target: function () {
return this._event.target || this._event.srcElement;
},
_relatedTarget: null,
/** @id MochiKit.Signal.Event.prototype.relatedTarget */
relatedTarget: function () {
if (this._relatedTarget !== null) {
return this._relatedTarget;
}
var elem = null;
if (this.type() == 'mouseover') {
elem = (this._event.relatedTarget ||
this._event.fromElement);
} else if (this.type() == 'mouseout') {
elem = (this._event.relatedTarget ||
this._event.toElement);
}
if (elem !== null) {
this._relatedTarget = elem;
return elem;
}
return undefined;
},
_modifier: null,
/** @id MochiKit.Signal.Event.prototype.modifier */
modifier: function () {
if (this._modifier !== null) {
return this._modifier;
}
var m = {};
m.alt = this._event.altKey;
m.ctrl = this._event.ctrlKey;
m.meta = this._event.metaKey || false; // IE and Opera punt here
m.shift = this._event.shiftKey;
m.any = m.alt || m.ctrl || m.shift || m.meta;
this._modifier = m;
return m;
},
_key: null,
/** @id MochiKit.Signal.Event.prototype.key */
key: function () {
if (this._key !== null) {
return this._key;
}
var k = {};
if (this.type() && this.type().indexOf('key') === 0) {
/*
If you're looking for a special key, look for it in keydown or
keyup, but never keypress. If you're looking for a Unicode
chracter, look for it with keypress, but never keyup or
keydown.
Notes:
FF key event behavior:
key event charCode keyCode
DOWN ku,kd 0 40
DOWN kp 0 40
ESC ku,kd 0 27
ESC kp 0 27
a ku,kd 0 65
a kp 97 0
shift+a ku,kd 0 65
shift+a kp 65 0
1 ku,kd 0 49
1 kp 49 0
shift+1 ku,kd 0 0
shift+1 kp 33 0
IE key event behavior:
(IE doesn't fire keypress events for special keys.)
key event keyCode
DOWN ku,kd 40
DOWN kp undefined
ESC ku,kd 27
ESC kp 27
a ku,kd 65
a kp 97
shift+a ku,kd 65
shift+a kp 65
1 ku,kd 49
1 kp 49
shift+1 ku,kd 49
shift+1 kp 33
Safari key event behavior:
(Safari sets charCode and keyCode to something weird for
special keys.)
key event charCode keyCode
DOWN ku,kd 63233 40
DOWN kp 63233 63233
ESC ku,kd 27 27
ESC kp 27 27
a ku,kd 97 65
a kp 97 97
shift+a ku,kd 65 65
shift+a kp 65 65
1 ku,kd 49 49
1 kp 49 49
shift+1 ku,kd 33 49
shift+1 kp 33 33
*/
/* look for special keys here */
if (this.type() == 'keydown' || this.type() == 'keyup') {
k.code = this._event.keyCode;
k.string = (MochiKit.Signal._specialKeys[k.code] ||
'KEY_UNKNOWN');
this._key = k;
return k;
/* look for characters here */
} else if (this.type() == 'keypress') {
/*
Special key behavior:
IE: does not fire keypress events for special keys
FF: sets charCode to 0, and sets the correct keyCode
Safari: sets keyCode and charCode to something stupid
*/
k.code = 0;
k.string = '';
if (typeof(this._event.charCode) != 'undefined' &&
this._event.charCode !== 0 &&
!MochiKit.Signal._specialMacKeys[this._event.charCode]) {
k.code = this._event.charCode;
k.string = String.fromCharCode(k.code);
} else if (this._event.keyCode &&
typeof(this._event.charCode) == 'undefined') { // IE
k.code = this._event.keyCode;
k.string = String.fromCharCode(k.code);
}
this._key = k;
return k;
}
}
return undefined;
},
_mouse: null,
/** @id MochiKit.Signal.Event.prototype.mouse */
mouse: function () {
if (this._mouse !== null) {
return this._mouse;
}
var m = {};
var e = this._event;
if (this.type() && (
this.type().indexOf('mouse') === 0 ||
this.type().indexOf('click') != -1 ||
this.type() == 'contextmenu')) {
m.client = new MochiKit.Style.Coordinates(0, 0);
if (e.clientX || e.clientY) {
m.client.x = (!e.clientX || e.clientX < 0) ? 0 : e.clientX;
m.client.y = (!e.clientY || e.clientY < 0) ? 0 : e.clientY;
}
m.page = new MochiKit.Style.Coordinates(0, 0);
if (e.pageX || e.pageY) {
m.page.x = (!e.pageX || e.pageX < 0) ? 0 : e.pageX;
m.page.y = (!e.pageY || e.pageY < 0) ? 0 : e.pageY;
} else {
/*
The IE shortcut can be off by two. We fix it. See:
This is similar to the method used in
MochiKit.Style.getElementPosition().
*/
var de = MochiKit.DOM._document.documentElement;
var b = MochiKit.DOM._document.body;
m.page.x = e.clientX +
(de.scrollLeft || b.scrollLeft) -
(de.clientLeft || 0);
m.page.y = e.clientY +
(de.scrollTop || b.scrollTop) -
(de.clientTop || 0);
}
if (this.type() != 'mousemove') {
m.button = {};
m.button.left = false;
m.button.right = false;
m.button.middle = false;
/* we could check e.button, but which is more consistent */
if (e.which) {
m.button.left = (e.which == 1);
m.button.middle = (e.which == 2);
m.button.right = (e.which == 3);
/*
Mac browsers and right click:
- Safari doesn't fire any click events on a right
click:
- Firefox fires the event, and sets ctrlKey = true
- Opera fires the event, and sets metaKey = true
oncontextmenu is fired on right clicks between
browsers and across platforms.
*/
} else {
m.button.left = !!(e.button & 1);
m.button.right = !!(e.button & 2);
m.button.middle = !!(e.button & 4);
}
}
this._mouse = m;
return m;
}
return undefined;
},
/** @id MochiKit.Signal.Event.prototype.stop */
stop: function () {
this.stopPropagation();
this.preventDefault();
},
/** @id MochiKit.Signal.Event.prototype.stopPropagation */
stopPropagation: function () {
if (this._event.stopPropagation) {
this._event.stopPropagation();
} else {
this._event.cancelBubble = true;
}
},
/** @id MochiKit.Signal.Event.prototype.preventDefault */
preventDefault: function () {
if (this._event.preventDefault) {
this._event.preventDefault();
} else if (this._confirmUnload === null) {
this._event.returnValue = false;
}
},
_confirmUnload: null,
/** @id MochiKit.Signal.Event.prototype.confirmUnload */
confirmUnload: function (msg) {
if (this.type() == 'beforeunload') {
this._confirmUnload = msg;
this._event.returnValue = msg;
}
}
});
/* Safari sets keyCode to these special values onkeypress. */
MochiKit.Signal._specialMacKeys = {
3: 'KEY_ENTER',
63289: 'KEY_NUM_PAD_CLEAR',
63276: 'KEY_PAGE_UP',
63277: 'KEY_PAGE_DOWN',
63275: 'KEY_END',
63273: 'KEY_HOME',
63234: 'KEY_ARROW_LEFT',
63232: 'KEY_ARROW_UP',
63235: 'KEY_ARROW_RIGHT',
63233: 'KEY_ARROW_DOWN',
63302: 'KEY_INSERT',
63272: 'KEY_DELETE'
};
/* for KEY_F1 - KEY_F12 */
(function () {
var _specialMacKeys = MochiKit.Signal._specialMacKeys;
for (i = 63236; i <= 63242; i++) {
// no F0
_specialMacKeys[i] = 'KEY_F' + (i - 63236 + 1);
}
})();
/* Standard keyboard key codes. */
MochiKit.Signal._specialKeys = {
8: 'KEY_BACKSPACE',
9: 'KEY_TAB',
12: 'KEY_NUM_PAD_CLEAR', // weird, for Safari and Mac FF only
13: 'KEY_ENTER',
16: 'KEY_SHIFT',
17: 'KEY_CTRL',
18: 'KEY_ALT',
19: 'KEY_PAUSE',
20: 'KEY_CAPS_LOCK',
27: 'KEY_ESCAPE',
32: 'KEY_SPACEBAR',
33: 'KEY_PAGE_UP',
34: 'KEY_PAGE_DOWN',
35: 'KEY_END',
36: 'KEY_HOME',
37: 'KEY_ARROW_LEFT',
38: 'KEY_ARROW_UP',
39: 'KEY_ARROW_RIGHT',
40: 'KEY_ARROW_DOWN',
44: 'KEY_PRINT_SCREEN',
45: 'KEY_INSERT',
46: 'KEY_DELETE',
59: 'KEY_SEMICOLON', // weird, for Safari and IE only
91: 'KEY_WINDOWS_LEFT',
92: 'KEY_WINDOWS_RIGHT',
93: 'KEY_SELECT',
106: 'KEY_NUM_PAD_ASTERISK',
107: 'KEY_NUM_PAD_PLUS_SIGN',
109: 'KEY_NUM_PAD_HYPHEN-MINUS',
110: 'KEY_NUM_PAD_FULL_STOP',
111: 'KEY_NUM_PAD_SOLIDUS',
144: 'KEY_NUM_LOCK',
145: 'KEY_SCROLL_LOCK',
186: 'KEY_SEMICOLON',
187: 'KEY_EQUALS_SIGN',
188: 'KEY_COMMA',
189: 'KEY_HYPHEN-MINUS',
190: 'KEY_FULL_STOP',
191: 'KEY_SOLIDUS',
192: 'KEY_GRAVE_ACCENT',
219: 'KEY_LEFT_SQUARE_BRACKET',
220: 'KEY_REVERSE_SOLIDUS',
221: 'KEY_RIGHT_SQUARE_BRACKET',
222: 'KEY_APOSTROPHE'
// undefined: 'KEY_UNKNOWN'
};
(function () {
/* for KEY_0 - KEY_9 */
var _specialKeys = MochiKit.Signal._specialKeys;
for (var i = 48; i <= 57; i++) {
_specialKeys[i] = 'KEY_' + (i - 48);
}
/* for KEY_A - KEY_Z */
for (i = 65; i <= 90; i++) {
_specialKeys[i] = 'KEY_' + String.fromCharCode(i);
}
/* for KEY_NUM_PAD_0 - KEY_NUM_PAD_9 */
for (i = 96; i <= 105; i++) {
_specialKeys[i] = 'KEY_NUM_PAD_' + (i - 96);
}
/* for KEY_F1 - KEY_F12 */
for (i = 112; i <= 123; i++) {
// no F0
_specialKeys[i] = 'KEY_F' + (i - 112 + 1);
}
})();
/* Internal object to keep track of created signals. */
MochiKit.Signal.Ident = function (ident) {
this.source = ident.source;
this.signal = ident.signal;
this.listener = ident.listener;
this.isDOM = ident.isDOM;
this.objOrFunc = ident.objOrFunc;
this.funcOrStr = ident.funcOrStr;
this.connected = ident.connected;
};
MochiKit.Signal.Ident.prototype = {};
MochiKit.Base.update(MochiKit.Signal, {
__repr__: function () {
return '[' + this.NAME + ' ' + this.VERSION + ']';
},
toString: function () {
return this.__repr__();
},
_unloadCache: function () {
var self = MochiKit.Signal;
var observers = self._observers;
for (var i = 0; i < observers.length; i++) {
if (observers[i].signal !== 'onload' && observers[i].signal !== 'onunload') {
self._disconnect(observers[i]);
}
}
},
_listener: function (src, sig, func, obj, isDOM) {
var self = MochiKit.Signal;
var E = self.Event;
if (!isDOM) {
return MochiKit.Base.bind(func, obj);
}
obj = obj || src;
if (typeof(func) == "string") {
if (sig === 'onload' || sig === 'onunload') {
return function (nativeEvent) {
obj[func].apply(obj, [new E(src, nativeEvent)]);
var ident = new MochiKit.Signal.Ident({
source: src, signal: sig, objOrFunc: obj, funcOrStr: func});
MochiKit.Signal._disconnect(ident);
};
} else {
return function (nativeEvent) {
obj[func].apply(obj, [new E(src, nativeEvent)]);
};
}
} else {
if (sig === 'onload' || sig === 'onunload') {
return function (nativeEvent) {
func.apply(obj, [new E(src, nativeEvent)]);
MochiKit.Signal.disconnect(src, sig, func);
var ident = new MochiKit.Signal.Ident({
source: src, signal: sig, objOrFunc: func});
MochiKit.Signal._disconnect(ident);
};
} else {
return function (nativeEvent) {
func.apply(obj, [new E(src, nativeEvent)]);
};
}
}
},
_browserAlreadyHasMouseEnterAndLeave: function () {
return /MSIE/.test(navigator.userAgent);
},
_mouseEnterListener: function (src, sig, func, obj) {
var E = MochiKit.Signal.Event;
return function (nativeEvent) {
var e = new E(src, nativeEvent);
try {
e.relatedTarget().nodeName;
} catch (err) {
/* probably hit a permission denied error; possibly one of
* firefox's screwy anonymous DIVs inside an input element.
* Allow this event to propogate up.
*/
return;
}
e.stop();
if (MochiKit.DOM.isChildNode(e.relatedTarget(), src)) {
/* We've moved between our node and a child. Ignore. */
return;
}
e.type = function () { return sig; };
if (typeof(func) == "string") {
return obj[func].apply(obj, [e]);
} else {
return func.apply(obj, [e]);
}
};
},
_getDestPair: function (objOrFunc, funcOrStr) {
var obj = null;
var func = null;
if (typeof(funcOrStr) != 'undefined') {
obj = objOrFunc;
func = funcOrStr;
if (typeof(funcOrStr) == 'string') {
if (typeof(objOrFunc[funcOrStr]) != "function") {
throw new Error("'funcOrStr' must be a function on 'objOrFunc'");
}
} else if (typeof(funcOrStr) != 'function') {
throw new Error("'funcOrStr' must be a function or string");
}
} else if (typeof(objOrFunc) != "function") {
throw new Error("'objOrFunc' must be a function if 'funcOrStr' is not given");
} else {
func = objOrFunc;
}
return [obj, func];
},
/** @id MochiKit.Signal.connect */
connect: function (src, sig, objOrFunc/* optional */, funcOrStr) {
src = MochiKit.DOM.getElement(src);
var self = MochiKit.Signal;
if (typeof(sig) != 'string') {
throw new Error("'sig' must be a string");
}
var destPair = self._getDestPair(objOrFunc, funcOrStr);
var obj = destPair[0];
var func = destPair[1];
if (typeof(obj) == 'undefined' || obj === null) {
obj = src;
}
var isDOM = !!(src.addEventListener || src.attachEvent);
if (isDOM && (sig === "onmouseenter" || sig === "onmouseleave")
&& !self._browserAlreadyHasMouseEnterAndLeave()) {
var listener = self._mouseEnterListener(src, sig.substr(2), func, obj);
if (sig === "onmouseenter") {
sig = "onmouseover";
} else {
sig = "onmouseout";
}
} else {
var listener = self._listener(src, sig, func, obj, isDOM);
}
if (src.addEventListener) {
src.addEventListener(sig.substr(2), listener, false);
} else if (src.attachEvent) {
src.attachEvent(sig, listener); // useCapture unsupported
}
var ident = new MochiKit.Signal.Ident({
source: src,
signal: sig,
listener: listener,
isDOM: isDOM,
objOrFunc: objOrFunc,
funcOrStr: funcOrStr,
connected: true
});
self._observers.push(ident);
if (!isDOM && typeof(src.__connect__) == 'function') {
var args = MochiKit.Base.extend([ident], arguments, 1);
src.__connect__.apply(src, args);
}
return ident;
},
_disconnect: function (ident) {
// already disconnected
if (!ident.connected) {
return;
}
ident.connected = false;
// check isDOM
if (!ident.isDOM) {
return;
}
var src = ident.source;
var sig = ident.signal;
var listener = ident.listener;
if (src.removeEventListener) {
src.removeEventListener(sig.substr(2), listener, false);
} else if (src.detachEvent) {
src.detachEvent(sig, listener); // useCapture unsupported
} else {
throw new Error("'src' must be a DOM element");
}
},
/** @id MochiKit.Signal.disconnect */
disconnect: function (ident) {
var self = MochiKit.Signal;
var observers = self._observers;
var m = MochiKit.Base;
if (arguments.length > 1) {
// compatibility API
var src = MochiKit.DOM.getElement(arguments[0]);
var sig = arguments[1];
var obj = arguments[2];
var func = arguments[3];
for (var i = observers.length - 1; i >= 0; i--) {
var o = observers[i];
if (o.source === src && o.signal === sig && o.objOrFunc === obj && o.funcOrStr === func) {
self._disconnect(o);
if (!self._lock) {
observers.splice(i, 1);
} else {
self._dirty = true;
}
return true;
}
}
} else {
var idx = m.findIdentical(observers, ident);
if (idx >= 0) {
self._disconnect(ident);
if (!self._lock) {
observers.splice(idx, 1);
} else {
self._dirty = true;
}
return true;
}
}
return false;
},
/** @id MochiKit.Signal.disconnectAllTo */
disconnectAllTo: function (objOrFunc, /* optional */funcOrStr) {
var self = MochiKit.Signal;
var observers = self._observers;
var disconnect = self._disconnect;
var locked = self._lock;
var dirty = self._dirty;
if (typeof(funcOrStr) === 'undefined') {
funcOrStr = null;
}
for (var i = observers.length - 1; i >= 0; i--) {
var ident = observers[i];
if (ident.objOrFunc === objOrFunc &&
(funcOrStr === null || ident.funcOrStr === funcOrStr)) {
disconnect(ident);
if (locked) {
dirty = true;
} else {
observers.splice(i, 1);
}
}
}
self._dirty = dirty;
},
/** @id MochiKit.Signal.disconnectAll */
disconnectAll: function (src/* optional */, sig) {
src = MochiKit.DOM.getElement(src);
var m = MochiKit.Base;
var signals = m.flattenArguments(m.extend(null, arguments, 1));
var self = MochiKit.Signal;
var disconnect = self._disconnect;
var observers = self._observers;
var i, ident;
var locked = self._lock;
var dirty = self._dirty;
if (signals.length === 0) {
// disconnect all
for (i = observers.length - 1; i >= 0; i--) {
ident = observers[i];
if (ident.source === src) {
disconnect(ident);
if (!locked) {
observers.splice(i, 1);
} else {
dirty = true;
}
}
}
} else {
var sigs = {};
for (i = 0; i < signals.length; i++) {
sigs[signals[i]] = true;
}
for (i = observers.length - 1; i >= 0; i--) {
ident = observers[i];
if (ident.source === src && ident.signal in sigs) {
disconnect(ident);
if (!locked) {
observers.splice(i, 1);
} else {
dirty = true;
}
}
}
}
self._dirty = dirty;
},
/** @id MochiKit.Signal.signal */
signal: function (src, sig) {
var self = MochiKit.Signal;
var observers = self._observers;
src = MochiKit.DOM.getElement(src);
var args = MochiKit.Base.extend(null, arguments, 2);
var errors = [];
self._lock = true;
for (var i = 0; i < observers.length; i++) {
var ident = observers[i];
if (ident.source === src && ident.signal === sig &&
ident.connected) {
try {
ident.listener.apply(src, args);
} catch (e) {
errors.push(e);
}
}
}
self._lock = false;
if (self._dirty) {
self._dirty = false;
for (var i = observers.length - 1; i >= 0; i--) {
if (!observers[i].connected) {
observers.splice(i, 1);
}
}
}
if (errors.length == 1) {
throw errors[0];
} else if (errors.length > 1) {
var e = new Error("Multiple errors thrown in handling 'sig', see errors property");
e.errors = errors;
throw e;
}
}
});
MochiKit.Signal.EXPORT_OK = [];
MochiKit.Signal.EXPORT = [
'connect',
'disconnect',
'signal',
'disconnectAll',
'disconnectAllTo'
];
MochiKit.Signal.__new__ = function (win) {
var m = MochiKit.Base;
this._document = document;
this._window = win;
this._lock = false;
this._dirty = false;
try {
this.connect(window, 'onunload', this._unloadCache);
} catch (e) {
// pass: might not be a browser
}
this.EXPORT_TAGS = {
':common': this.EXPORT,
':all': m.concat(this.EXPORT, this.EXPORT_OK)
};
m.nameFunctions(this);
};
MochiKit.Signal.__new__(this);
//
// XXX: Internet Explorer blows
//
if (MochiKit.__export__) {
connect = MochiKit.Signal.connect;
disconnect = MochiKit.Signal.disconnect;
disconnectAll = MochiKit.Signal.disconnectAll;
signal = MochiKit.Signal.signal;
}
MochiKit.Base._exportSymbols(this, MochiKit.Signal);