gecko/browser/components/tabview/iq.js
2012-05-21 12:12:37 +01:00

764 lines
20 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// **********
// Title: iq.js
// Various helper functions, in the vein of jQuery.
// ----------
// Function: iQ
// Returns an iQClass object which represents an individual element or a group
// of elements. It works pretty much like jQuery(), with a few exceptions,
// most notably that you can't use strings with complex html,
// just simple tags like '<div>'.
function iQ(selector, context) {
// The iQ object is actually just the init constructor 'enhanced'
return new iQClass(selector, context);
};
// A simple way to check for HTML strings or ID strings
// (both of which we optimize for)
let quickExpr = /^[^<]*(<[\w\W]+>)[^>]*$|^#([\w-]+)$/;
// Match a standalone tag
let rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/;
// ##########
// Class: iQClass
// The actual class of iQ result objects, representing an individual element
// or a group of elements.
//
// ----------
// Function: iQClass
// You don't call this directly; this is what's called by iQ().
function iQClass(selector, context) {
// Handle $(""), $(null), or $(undefined)
if (!selector) {
return this;
}
// Handle $(DOMElement)
if (selector.nodeType) {
this.context = selector;
this[0] = selector;
this.length = 1;
return this;
}
// The body element only exists once, optimize finding it
if (selector === "body" && !context) {
this.context = document;
this[0] = document.body;
this.selector = "body";
this.length = 1;
return this;
}
// Handle HTML strings
if (typeof selector === "string") {
// Are we dealing with HTML string or an ID?
let match = quickExpr.exec(selector);
// Verify a match, and that no context was specified for #id
if (match && (match[1] || !context)) {
// HANDLE $(html) -> $(array)
if (match[1]) {
let doc = (context ? context.ownerDocument || context : document);
// If a single string is passed in and it's a single tag
// just do a createElement and skip the rest
let ret = rsingleTag.exec(selector);
if (ret) {
if (Utils.isPlainObject(context)) {
Utils.assert(false, 'does not support HTML creation with context');
} else {
selector = [doc.createElement(ret[1])];
}
} else {
Utils.assert(false, 'does not support complex HTML creation');
}
return Utils.merge(this, selector);
// HANDLE $("#id")
} else {
let elem = document.getElementById(match[2]);
if (elem) {
this.length = 1;
this[0] = elem;
}
this.context = document;
this.selector = selector;
return this;
}
// HANDLE $("TAG")
} else if (!context && /^\w+$/.test(selector)) {
this.selector = selector;
this.context = document;
selector = document.getElementsByTagName(selector);
return Utils.merge(this, selector);
// HANDLE $(expr, $(...))
} else if (!context || context.iq) {
return (context || iQ(document)).find(selector);
// HANDLE $(expr, context)
// (which is just equivalent to: $(context).find(expr)
} else {
return iQ(context).find(selector);
}
// HANDLE $(function)
// Shortcut for document ready
} else if (typeof selector == "function") {
Utils.log('iQ does not support ready functions');
return null;
}
if ("selector" in selector) {
this.selector = selector.selector;
this.context = selector.context;
}
let ret = this || [];
if (selector != null) {
// The window, strings (and functions) also have 'length'
if (selector.length == null || typeof selector == "string" || selector.setInterval) {
Array.push(ret, selector);
} else {
Utils.merge(ret, selector);
}
}
return ret;
};
iQClass.prototype = {
// ----------
// Function: toString
// Prints [iQ...] for debug use
toString: function iQClass_toString() {
if (this.length > 1) {
if (this.selector)
return "[iQ (" + this.selector + ")]";
else
return "[iQ multi-object]";
}
if (this.length == 1)
return "[iQ (" + this[0].toString() + ")]";
return "[iQ non-object]";
},
// Start with an empty selector
selector: "",
// The default length of a iQ object is 0
length: 0,
// ----------
// Function: each
// Execute a callback for every element in the matched set.
each: function iQClass_each(callback) {
if (typeof callback != "function") {
Utils.assert(false, "each's argument must be a function");
return null;
}
for (let i = 0; this[i] != null && callback(this[i]) !== false; i++) {}
return this;
},
// ----------
// Function: addClass
// Adds the given class(es) to the receiver.
addClass: function iQClass_addClass(value) {
Utils.assertThrow(typeof value == "string" && value,
'requires a valid string argument');
let length = this.length;
for (let i = 0; i < length; i++) {
let elem = this[i];
if (elem.nodeType === 1) {
value.split(/\s+/).forEach(function(className) {
elem.classList.add(className);
});
}
}
return this;
},
// ----------
// Function: removeClass
// Removes the given class(es) from the receiver.
removeClass: function iQClass_removeClass(value) {
if (typeof value != "string" || !value) {
Utils.assert(false, 'does not support function argument');
return null;
}
let length = this.length;
for (let i = 0; i < length; i++) {
let elem = this[i];
if (elem.nodeType === 1 && elem.className) {
value.split(/\s+/).forEach(function(className) {
elem.classList.remove(className);
});
}
}
return this;
},
// ----------
// Function: hasClass
// Returns true is the receiver has the given css class.
hasClass: function iQClass_hasClass(singleClassName) {
let length = this.length;
for (let i = 0; i < length; i++) {
if (this[i].classList.contains(singleClassName)) {
return true;
}
}
return false;
},
// ----------
// Function: find
// Searches the receiver and its children, returning a new iQ object with
// elements that match the given selector.
find: function iQClass_find(selector) {
let ret = [];
let length = 0;
let l = this.length;
for (let i = 0; i < l; i++) {
length = ret.length;
try {
Utils.merge(ret, this[i].querySelectorAll(selector));
} catch(e) {
Utils.log('iQ.find error (bad selector)', e);
}
if (i > 0) {
// Make sure that the results are unique
for (let n = length; n < ret.length; n++) {
for (let r = 0; r < length; r++) {
if (ret[r] === ret[n]) {
ret.splice(n--, 1);
break;
}
}
}
}
}
return iQ(ret);
},
// ----------
// Function: contains
// Check to see if a given DOM node descends from the receiver.
contains: function iQClass_contains(selector) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
// fast path when querySelector() can be used
if ('string' == typeof selector)
return null != this[0].querySelector(selector);
let object = iQ(selector);
Utils.assert(object.length <= 1, 'does not yet support multi-objects');
let elem = object[0];
if (!elem || !elem.parentNode)
return false;
do {
elem = elem.parentNode;
} while (elem && this[0] != elem);
return this[0] == elem;
},
// ----------
// Function: remove
// Removes the receiver from the DOM.
remove: function iQClass_remove(options) {
if (!options || !options.preserveEventHandlers)
this.unbindAll();
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
if (elem.parentNode) {
elem.parentNode.removeChild(elem);
}
}
return this;
},
// ----------
// Function: empty
// Removes all of the reciever's children and HTML content from the DOM.
empty: function iQClass_empty() {
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
while (elem.firstChild) {
iQ(elem.firstChild).unbindAll();
elem.removeChild(elem.firstChild);
}
}
return this;
},
// ----------
// Function: width
// Returns the width of the receiver, including padding and border.
width: function iQClass_width() {
return Math.floor(this[0].offsetWidth);
},
// ----------
// Function: height
// Returns the height of the receiver, including padding and border.
height: function iQClass_height() {
return Math.floor(this[0].offsetHeight);
},
// ----------
// Function: position
// Returns an object with the receiver's position in left and top
// properties.
position: function iQClass_position() {
let bounds = this.bounds();
return new Point(bounds.left, bounds.top);
},
// ----------
// Function: bounds
// Returns a <Rect> with the receiver's bounds.
bounds: function iQClass_bounds() {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
let rect = this[0].getBoundingClientRect();
return new Rect(Math.floor(rect.left), Math.floor(rect.top),
Math.floor(rect.width), Math.floor(rect.height));
},
// ----------
// Function: data
// Pass in both key and value to attach some data to the receiver;
// pass in just key to retrieve it.
data: function iQClass_data(key, value) {
let data = null;
if (value === undefined) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
data = this[0].iQData;
if (data)
return data[key];
else
return null;
}
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
data = elem.iQData;
if (!data)
data = elem.iQData = {};
data[key] = value;
}
return this;
},
// ----------
// Function: html
// Given a value, sets the receiver's innerHTML to it; otherwise returns
// what's already there.
html: function iQClass_html(value) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
if (value === undefined)
return this[0].innerHTML;
this[0].innerHTML = value;
return this;
},
// ----------
// Function: text
// Given a value, sets the receiver's textContent to it; otherwise returns
// what's already there.
text: function iQClass_text(value) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
if (value === undefined) {
return this[0].textContent;
}
return this.empty().append((this[0] && this[0].ownerDocument || document).createTextNode(value));
},
// ----------
// Function: val
// Given a value, sets the receiver's value to it; otherwise returns what's already there.
val: function iQClass_val(value) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
if (value === undefined) {
return this[0].value;
}
this[0].value = value;
return this;
},
// ----------
// Function: appendTo
// Appends the receiver to the result of iQ(selector).
appendTo: function iQClass_appendTo(selector) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
iQ(selector).append(this);
return this;
},
// ----------
// Function: append
// Appends the result of iQ(selector) to the receiver.
append: function iQClass_append(selector) {
let object = iQ(selector);
Utils.assert(object.length == 1 && this.length == 1,
'does not yet support multi-objects (or null objects)');
this[0].appendChild(object[0]);
return this;
},
// ----------
// Function: attr
// Sets or gets an attribute on the element(s).
attr: function iQClass_attr(key, value) {
Utils.assert(typeof key === 'string', 'string key');
if (value === undefined) {
Utils.assert(this.length == 1, 'retrieval does not support multi-objects (or null objects)');
return this[0].getAttribute(key);
}
for (let i = 0; this[i] != null; i++)
this[i].setAttribute(key, value);
return this;
},
// ----------
// Function: css
// Sets or gets CSS properties on the receiver. When setting certain numerical properties,
// will automatically add "px". A property can be removed by setting it to null.
//
// Possible call patterns:
// a: object, b: undefined - sets with properties from a
// a: string, b: undefined - gets property specified by a
// a: string, b: string/number - sets property specified by a to b
css: function iQClass_css(a, b) {
let properties = null;
if (typeof a === 'string') {
let key = a;
if (b === undefined) {
Utils.assert(this.length == 1, 'retrieval does not support multi-objects (or null objects)');
return window.getComputedStyle(this[0], null).getPropertyValue(key);
}
properties = {};
properties[key] = b;
} else if (a instanceof Rect) {
properties = {
left: a.left,
top: a.top,
width: a.width,
height: a.height
};
} else {
properties = a;
}
let pixels = {
'left': true,
'top': true,
'right': true,
'bottom': true,
'width': true,
'height': true
};
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
for (let key in properties) {
let value = properties[key];
if (pixels[key] && typeof value != 'string')
value += 'px';
if (value == null) {
elem.style.removeProperty(key);
} else if (key.indexOf('-') != -1)
elem.style.setProperty(key, value, '');
else
elem.style[key] = value;
}
}
return this;
},
// ----------
// Function: animate
// Uses CSS transitions to animate the element.
//
// Parameters:
// css - an object map of the CSS properties to change
// options - an object with various properites (see below)
//
// Possible "options" properties:
// duration - how long to animate, in milliseconds
// easing - easing function to use. Possibilities include
// "tabviewBounce", "easeInQuad". Default is "ease".
// complete - function to call once the animation is done, takes nothing
// in, but "this" is set to the element that was animated.
animate: function iQClass_animate(css, options) {
Utils.assert(this.length == 1, 'does not yet support multi-objects (or null objects)');
if (!options)
options = {};
let easings = {
tabviewBounce: "cubic-bezier(0.0, 0.63, .6, 1.29)",
easeInQuad: 'ease-in', // TODO: make it a real easeInQuad, or decide we don't care
fast: 'cubic-bezier(0.7,0,1,1)'
};
let duration = (options.duration || 400);
let easing = (easings[options.easing] || 'ease');
if (css instanceof Rect) {
css = {
left: css.left,
top: css.top,
width: css.width,
height: css.height
};
}
// The latest versions of Firefox do not animate from a non-explicitly
// set css properties. So for each element to be animated, go through
// and explicitly define 'em.
let rupper = /([A-Z])/g;
this.each(function(elem) {
let cStyle = window.getComputedStyle(elem, null);
for (let prop in css) {
prop = prop.replace(rupper, "-$1").toLowerCase();
iQ(elem).css(prop, cStyle.getPropertyValue(prop));
}
});
this.css({
'-moz-transition-property': Object.keys(css).join(", "),
'-moz-transition-duration': (duration / 1000) + 's',
'-moz-transition-timing-function': easing
});
this.css(css);
let self = this;
setTimeout(function() {
self.css({
'-moz-transition-property': 'none',
'-moz-transition-duration': '',
'-moz-transition-timing-function': ''
});
if (typeof options.complete == "function")
options.complete.apply(self);
}, duration);
return this;
},
// ----------
// Function: fadeOut
// Animates the receiver to full transparency. Calls callback on completion.
fadeOut: function iQClass_fadeOut(callback) {
Utils.assert(typeof callback == "function" || callback === undefined,
'does not yet support duration');
this.animate({
opacity: 0
}, {
duration: 400,
complete: function() {
iQ(this).css({display: 'none'});
if (typeof callback == "function")
callback.apply(this);
}
});
return this;
},
// ----------
// Function: fadeIn
// Animates the receiver to full opacity.
fadeIn: function iQClass_fadeIn() {
this.css({display: ''});
this.animate({
opacity: 1
}, {
duration: 400
});
return this;
},
// ----------
// Function: hide
// Hides the receiver.
hide: function iQClass_hide() {
this.css({display: 'none', opacity: 0});
return this;
},
// ----------
// Function: show
// Shows the receiver.
show: function iQClass_show() {
this.css({display: '', opacity: 1});
return this;
},
// ----------
// Function: bind
// Binds the given function to the given event type. Also wraps the function
// in a try/catch block that does a Utils.log on any errors.
bind: function iQClass_bind(type, func) {
let handler = function(event) func.apply(this, [event]);
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
if (!elem.iQEventData)
elem.iQEventData = {};
if (!elem.iQEventData[type])
elem.iQEventData[type] = [];
elem.iQEventData[type].push({
original: func,
modified: handler
});
elem.addEventListener(type, handler, false);
}
return this;
},
// ----------
// Function: one
// Binds the given function to the given event type, but only for one call;
// automatically unbinds after the event fires once.
one: function iQClass_one(type, func) {
Utils.assert(typeof func == "function", 'does not support eventData argument');
let handler = function(e) {
iQ(this).unbind(type, handler);
return func.apply(this, [e]);
};
return this.bind(type, handler);
},
// ----------
// Function: unbind
// Unbinds the given function from the given event type.
unbind: function iQClass_unbind(type, func) {
Utils.assert(typeof func == "function", 'Must provide a function');
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
let handler = func;
if (elem.iQEventData && elem.iQEventData[type]) {
let count = elem.iQEventData[type].length;
for (let a = 0; a < count; a++) {
let pair = elem.iQEventData[type][a];
if (pair.original == func) {
handler = pair.modified;
elem.iQEventData[type].splice(a, 1);
if (!elem.iQEventData[type].length) {
delete elem.iQEventData[type];
if (!Object.keys(elem.iQEventData).length)
delete elem.iQEventData;
}
break;
}
}
}
elem.removeEventListener(type, handler, false);
}
return this;
},
// ----------
// Function: unbindAll
// Unbinds all event handlers.
unbindAll: function iQClass_unbindAll() {
for (let i = 0; this[i] != null; i++) {
let elem = this[i];
for (let j = 0; j < elem.childElementCount; j++)
iQ(elem.children[j]).unbindAll();
if (!elem.iQEventData)
continue;
Object.keys(elem.iQEventData).forEach(function (type) {
while (elem.iQEventData && elem.iQEventData[type])
this.unbind(type, elem.iQEventData[type][0].original);
}, this);
}
return this;
}
};
// ----------
// Create various event aliases
let events = [
'keyup',
'keydown',
'keypress',
'mouseup',
'mousedown',
'mouseover',
'mouseout',
'mousemove',
'click',
'dblclick',
'resize',
'change',
'blur',
'focus'
];
events.forEach(function(event) {
iQClass.prototype[event] = function(func) {
return this.bind(event, func);
};
});