(function(Y) {
/**
* The DOM utility provides a cross-browser abtraction layer
* normalizing DOM tasks, and adds extra helper functionality
* for other common tasks.
* @module dom
* @submodule dom-base
* @for DOM
*
*/
/**
* Provides DOM helper methods.
* @class DOM
*
*/
var NODE_TYPE = 'nodeType',
OWNER_DOCUMENT = 'ownerDocument',
DOCUMENT_ELEMENT = 'documentElement',
DEFAULT_VIEW = 'defaultView',
PARENT_WINDOW = 'parentWindow',
TAG_NAME = 'tagName',
PARENT_NODE = 'parentNode',
FIRST_CHILD = 'firstChild',
PREVIOUS_SIBLING = 'previousSibling',
NEXT_SIBLING = 'nextSibling',
CONTAINS = 'contains',
COMPARE_DOCUMENT_POSITION = 'compareDocumentPosition',
EMPTY_STRING = '',
EMPTY_ARRAY = [],
documentElement = Y.config.doc.documentElement,
re_tag = /<([a-z]+)/i,
createFromDIV = function(html, tag) {
var div = Y.config.doc.createElement('div'),
ret = true;
div.innerHTML = html;
if (!div.firstChild || div.firstChild.tagName !== tag.toUpperCase()) {
ret = false;
}
return ret;
},
addFeature = Y.Features.add,
testFeature = Y.Features.test,
Y_DOM = {
/**
* Returns the HTMLElement with the given ID (Wrapper for document.getElementById).
* @method byId
* @param {String} id the id attribute
* @param {Object} doc optional The document to search. Defaults to current document
* @return {HTMLElement | null} The HTMLElement with the id, or null if none found.
*/
byId: function(id, doc) {
// handle dupe IDs and IE name collision
return Y_DOM.allById(id, doc)[0] || null;
},
/**
* Returns the text content of the HTMLElement.
* @method getText
* @param {HTMLElement} element The html element.
* @return {String} The text content of the element (includes text of any descending elements).
*/
getText: (documentElement.textContent !== undefined) ?
function(element) {
var ret = '';
if (element) {
ret = element.textContent;
}
return ret || '';
} : function(element) {
var ret = '';
if (element) {
ret = element.innerText || element.nodeValue; // might be a textNode
}
return ret || '';
},
/**
* Sets the text content of the HTMLElement.
* @method setText
* @param {HTMLElement} element The html element.
* @param {String} content The content to add.
*/
setText: (documentElement.textContent !== undefined) ?
function(element, content) {
if (element) {
element.textContent = content;
}
} : function(element, content) {
if ('innerText' in element) {
element.innerText = content;
} else if ('nodeValue' in element) {
element.nodeValue = content;
}
},
/*
* Finds the ancestor of the element.
* @method ancestor
* @param {HTMLElement} element The html element.
* @param {Function} fn optional An optional boolean test to apply.
* The optional function is passed the current DOM node being tested as its only argument.
* If no function is given, the parentNode is returned.
* @param {Boolean} testSelf optional Whether or not to include the element in the scan
* @return {HTMLElement | null} The matching DOM node or null if none found.
*/
ancestor: function(element, fn, testSelf) {
var ret = null;
if (testSelf) {
ret = (!fn || fn(element)) ? element : null;
}
return ret || Y_DOM.elementByAxis(element, PARENT_NODE, fn, null);
},
/*
* Finds the ancestors of the element.
* @method ancestors
* @param {HTMLElement} element The html element.
* @param {Function} fn optional An optional boolean test to apply.
* The optional function is passed the current DOM node being tested as its only argument.
* If no function is given, all ancestors are returned.
* @param {Boolean} testSelf optional Whether or not to include the element in the scan
* @return {Array} An array containing all matching DOM nodes.
*/
ancestors: function(element, fn, testSelf) {
var ancestor = Y_DOM.ancestor.apply(Y_DOM, arguments),
ret = (ancestor) ? [ancestor] : [];
while ((ancestor = Y_DOM.ancestor(ancestor, fn))) {
if (ancestor) {
ret.unshift(ancestor);
}
}
return ret;
},
/**
* Searches the element by the given axis for the first matching element.
* @method elementByAxis
* @param {HTMLElement} element The html element.
* @param {String} axis The axis to search (parentNode, nextSibling, previousSibling).
* @param {Function} fn optional An optional boolean test to apply.
* @param {Boolean} all optional Whether all node types should be returned, or just element nodes.
* The optional function is passed the current HTMLElement being tested as its only argument.
* If no function is given, the first element is returned.
* @return {HTMLElement | null} The matching element or null if none found.
*/
elementByAxis: function(element, axis, fn, all) {
while (element && (element = element[axis])) { // NOTE: assignment
if ( (all || element[TAG_NAME]) && (!fn || fn(element)) ) {
return element;
}
}
return null;
},
/**
* Determines whether or not one HTMLElement is or contains another HTMLElement.
* @method contains
* @param {HTMLElement} element The containing html element.
* @param {HTMLElement} needle The html element that may be contained.
* @return {Boolean} Whether or not the element is or contains the needle.
*/
contains: function(element, needle) {
var ret = false;
if ( !needle || !element || !needle[NODE_TYPE] || !element[NODE_TYPE]) {
ret = false;
} else if (element[CONTAINS]) {
if (Y.UA.opera || needle[NODE_TYPE] === 1) { // IE & SAF contains fail if needle not an ELEMENT_NODE
ret = element[CONTAINS](needle);
} else {
ret = Y_DOM._bruteContains(element, needle);
}
} else if (element[COMPARE_DOCUMENT_POSITION]) { // gecko
if (element === needle || !!(element[COMPARE_DOCUMENT_POSITION](needle) & 16)) {
ret = true;
}
}
return ret;
},
/**
* Determines whether or not the HTMLElement is part of the document.
* @method inDoc
* @param {HTMLElement} element The containing html element.
* @param {HTMLElement} doc optional The document to check.
* @return {Boolean} Whether or not the element is attached to the document.
*/
inDoc: function(element, doc) {
var ret = false,
rootNode;
if (element && element.nodeType) {
(doc) || (doc = element[OWNER_DOCUMENT]);
rootNode = doc[DOCUMENT_ELEMENT];
// contains only works with HTML_ELEMENT
if (rootNode && rootNode.contains && element.tagName) {
ret = rootNode.contains(element);
} else {
ret = Y_DOM.contains(rootNode, element);
}
}
return ret;
},
allById: function(id, root) {
root = root || Y.config.doc;
var nodes = [],
ret = [],
i,
node;
if (root.querySelectorAll) {
ret = root.querySelectorAll('[id="' + id + '"]');
} else if (root.all) {
nodes = root.all(id);
if (nodes) {
// root.all may return HTMLElement or HTMLCollection.
// some elements are also HTMLCollection (FORM, SELECT).
if (nodes.nodeName) {
if (nodes.id === id) { // avoid false positive on name
ret.push(nodes);
nodes = EMPTY_ARRAY; // done, no need to filter
} else { // prep for filtering
nodes = [nodes];
}
}
if (nodes.length) {
// filter out matches on node.name
// and element.id as reference to element with id === 'id'
for (i = 0; node = nodes[i++];) {
if (node.id === id ||
(node.attributes && node.attributes.id &&
node.attributes.id.value === id)) {
ret.push(node);
}
}
}
}
} else {
ret = [Y_DOM._getDoc(root).getElementById(id)];
}
return ret;
},
/**
* Creates a new dom node using the provided markup string.
* @method create
* @param {String} html The markup used to create the element
* @param {HTMLDocument} doc An optional document context
* @return {HTMLElement|DocumentFragment} returns a single HTMLElement
* when creating one node, and a documentFragment when creating
* multiple nodes.
*/
create: function(html, doc) {
if (typeof html === 'string') {
html = Y.Lang.trim(html); // match IE which trims whitespace from innerHTML
}
doc = doc || Y.config.doc;
var m = re_tag.exec(html),
create = Y_DOM._create,
custom = Y_DOM.creators,
ret = null,
creator,
tag, nodes;
if (html != undefined) { // not undefined or null
if (m && m[1]) {
creator = custom[m[1].toLowerCase()];
if (typeof creator === 'function') {
create = creator;
} else {
tag = creator;
}
}
nodes = create(html, doc, tag).childNodes;
if (nodes.length === 1) { // return single node, breaking parentNode ref from "fragment"
ret = nodes[0].parentNode.removeChild(nodes[0]);
} else if (nodes[0] && nodes[0].className === 'yui3-big-dummy') { // using dummy node to preserve some attributes (e.g. OPTION not selected)
if (nodes.length === 2) {
ret = nodes[0].nextSibling;
} else {
nodes[0].parentNode.removeChild(nodes[0]);
ret = Y_DOM._nl2frag(nodes, doc);
}
} else { // return multiple nodes as a fragment
ret = Y_DOM._nl2frag(nodes, doc);
}
}
return ret;
},
_nl2frag: function(nodes, doc) {
var ret = null,
i, len;
if (nodes && (nodes.push || nodes.item) && nodes[0]) {
doc = doc || nodes[0].ownerDocument;
ret = doc.createDocumentFragment();
if (nodes.item) { // convert live list to static array
nodes = Y.Array(nodes, 0, true);
}
for (i = 0, len = nodes.length; i < len; i++) {
ret.appendChild(nodes[i]);
}
} // else inline with log for minification
else { Y.log('unable to convert ' + nodes + ' to fragment', 'warn', 'dom'); }
return ret;
},
CUSTOM_ATTRIBUTES: (!documentElement.hasAttribute) ? { // IE < 8
'for': 'htmlFor',
'class': 'className'
} : { // w3c
'htmlFor': 'for',
'className': 'class'
},
/**
* Provides a normalized attribute interface.
* @method setAttibute
* @param {HTMLElement} el The target element for the attribute.
* @param {String} attr The attribute to set.
* @param {String} val The value of the attribute.
*/
setAttribute: function(el, attr, val, ieAttr) {
if (el && attr && el.setAttribute) {
attr = Y_DOM.CUSTOM_ATTRIBUTES[attr] || attr;
el.setAttribute(attr, val, ieAttr);
}
else { Y.log('bad input to setAttribute', 'warn', 'dom'); }
},
/**
* Provides a normalized attribute interface.
* @method getAttibute
* @param {HTMLElement} el The target element for the attribute.
* @param {String} attr The attribute to get.
* @return {String} The current value of the attribute.
*/
getAttribute: function(el, attr, ieAttr) {
ieAttr = (ieAttr !== undefined) ? ieAttr : 2;
var ret = '';
if (el && attr && el.getAttribute) {
attr = Y_DOM.CUSTOM_ATTRIBUTES[attr] || attr;
ret = el.getAttribute(attr, ieAttr);
if (ret === null) {
ret = ''; // per DOM spec
}
}
else { Y.log('bad input to getAttribute', 'warn', 'dom'); }
return ret;
},
isWindow: function(obj) {
return !!(obj && obj.alert && obj.document);
},
_fragClones: {},
_create: function(html, doc, tag) {
tag = tag || 'div';
var frag = Y_DOM._fragClones[tag];
if (frag) {
frag = frag.cloneNode(false);
} else {
frag = Y_DOM._fragClones[tag] = doc.createElement(tag);
}
frag.innerHTML = html;
return frag;
},
_removeChildNodes: function(node) {
while (node.firstChild) {
node.removeChild(node.firstChild);
}
},
/**
* Inserts content in a node at the given location
* @method addHTML
* @param {HTMLElement} node The node to insert into
* @param {HTMLElement | Array | HTMLCollection} content The content to be inserted
* @param {HTMLElement} where Where to insert the content
* If no "where" is given, content is appended to the node
* Possible values for "where"
* <dl>
* <dt>HTMLElement</dt>
* <dd>The element to insert before</dd>
* <dt>"replace"</dt>
* <dd>Replaces the existing HTML</dd>
* <dt>"before"</dt>
* <dd>Inserts before the existing HTML</dd>
* <dt>"before"</dt>
* <dd>Inserts content before the node</dd>
* <dt>"after"</dt>
* <dd>Inserts content after the node</dd>
* </dl>
*/
addHTML: function(node, content, where) {
var nodeParent = node.parentNode,
i = 0,
item,
ret = content,
newNode;
if (content != undefined) { // not null or undefined (maybe 0)
if (content.nodeType) { // DOM node, just add it
newNode = content;
} else if (typeof content == 'string' || typeof content == 'number') {
ret = newNode = Y_DOM.create(content);
} else if (content[0] && content[0].nodeType) { // array or collection
newNode = Y.config.doc.createDocumentFragment();
while ((item = content[i++])) {
newNode.appendChild(item); // append to fragment for insertion
}
}
}
if (where) {
if (where.nodeType) { // insert regardless of relationship to node
where.parentNode.insertBefore(newNode, where);
} else {
switch (where) {
case 'replace':
while (node.firstChild) {
node.removeChild(node.firstChild);
}
if (newNode) { // allow empty content to clear node
node.appendChild(newNode);
}
break;
case 'before':
nodeParent.insertBefore(newNode, node);
break;
case 'after':
if (node.nextSibling) { // IE errors if refNode is null
nodeParent.insertBefore(newNode, node.nextSibling);
} else {
nodeParent.appendChild(newNode);
}
break;
default:
node.appendChild(newNode);
}
}
} else if (newNode) {
node.appendChild(newNode);
}
return ret;
},
VALUE_SETTERS: {},
VALUE_GETTERS: {},
getValue: function(node) {
var ret = '', // TODO: return null?
getter;
if (node && node[TAG_NAME]) {
getter = Y_DOM.VALUE_GETTERS[node[TAG_NAME].toLowerCase()];
if (getter) {
ret = getter(node);
} else {
ret = node.value;
}
}
// workaround for IE8 JSON stringify bug
// which converts empty string values to null
if (ret === EMPTY_STRING) {
ret = EMPTY_STRING; // for real
}
return (typeof ret === 'string') ? ret : '';
},
setValue: function(node, val) {
var setter;
if (node && node[TAG_NAME]) {
setter = Y_DOM.VALUE_SETTERS[node[TAG_NAME].toLowerCase()];
if (setter) {
setter(node, val);
} else {
node.value = val;
}
}
},
siblings: function(node, fn) {
var nodes = [],
sibling = node;
while ((sibling = sibling[PREVIOUS_SIBLING])) {
if (sibling[TAG_NAME] && (!fn || fn(sibling))) {
nodes.unshift(sibling);
}
}
sibling = node;
while ((sibling = sibling[NEXT_SIBLING])) {
if (sibling[TAG_NAME] && (!fn || fn(sibling))) {
nodes.push(sibling);
}
}
return nodes;
},
/**
* Brute force version of contains.
* Used for browsers without contains support for non-HTMLElement Nodes (textNodes, etc).
* @method _bruteContains
* @private
* @param {HTMLElement} element The containing html element.
* @param {HTMLElement} needle The html element that may be contained.
* @return {Boolean} Whether or not the element is or contains the needle.
*/
_bruteContains: function(element, needle) {
while (needle) {
if (element === needle) {
return true;
}
needle = needle.parentNode;
}
return false;
},
// TODO: move to Lang?
/**
* Memoizes dynamic regular expressions to boost runtime performance.
* @method _getRegExp
* @private
* @param {String} str The string to convert to a regular expression.
* @param {String} flags optional An optinal string of flags.
* @return {RegExp} An instance of RegExp
*/
_getRegExp: function(str, flags) {
flags = flags || '';
Y_DOM._regexCache = Y_DOM._regexCache || {};
if (!Y_DOM._regexCache[str + flags]) {
Y_DOM._regexCache[str + flags] = new RegExp(str, flags);
}
return Y_DOM._regexCache[str + flags];
},
// TODO: make getDoc/Win true privates?
/**
* returns the appropriate document.
* @method _getDoc
* @private
* @param {HTMLElement} element optional Target element.
* @return {Object} The document for the given element or the default document.
*/
_getDoc: function(element) {
var doc = Y.config.doc;
if (element) {
doc = (element[NODE_TYPE] === 9) ? element : // element === document
element[OWNER_DOCUMENT] || // element === DOM node
element.document || // element === window
Y.config.doc; // default
}
return doc;
},
/**
* returns the appropriate window.
* @method _getWin
* @private
* @param {HTMLElement} element optional Target element.
* @return {Object} The window for the given element or the default window.
*/
_getWin: function(element) {
var doc = Y_DOM._getDoc(element);
return doc[DEFAULT_VIEW] || doc[PARENT_WINDOW] || Y.config.win;
},
_batch: function(nodes, fn, arg1, arg2, arg3, etc) {
fn = (typeof fn === 'string') ? Y_DOM[fn] : fn;
var result,
args = Array.prototype.slice.call(arguments, 2),
i = 0,
node,
ret;
if (fn && nodes) {
while ((node = nodes[i++])) {
result = result = fn.call(Y_DOM, node, arg1, arg2, arg3, etc);
if (typeof result !== 'undefined') {
(ret) || (ret = []);
ret.push(result);
}
}
}
return (typeof ret !== 'undefined') ? ret : nodes;
},
wrap: function(node, html) {
var parent = Y.DOM.create(html),
nodes = parent.getElementsByTagName('*');
if (nodes.length) {
parent = nodes[nodes.length - 1];
}
if (node.parentNode) {
node.parentNode.replaceChild(parent, node);
}
parent.appendChild(node);
},
unwrap: function(node) {
var parent = node.parentNode,
lastChild = parent.lastChild,
node = parent.firstChild,
next = node,
grandparent;
if (parent) {
grandparent = parent.parentNode;
if (grandparent) {
while (node !== lastChild) {
next = node.nextSibling;
grandparent.insertBefore(node, parent);
node = next;
}
grandparent.replaceChild(lastChild, parent);
} else {
parent.removeChild(node);
}
}
},
generateID: function(el) {
var id = el.id;
if (!id) {
id = Y.stamp(el);
el.id = id;
}
return id;
},
creators: {}
};
addFeature('innerhtml', 'table', {
test: function() {
var node = Y.config.doc.createElement('table');
try {
node.innerHTML = '<tbody></tbody>';
} catch(e) {
return false;
}
return (node.firstChild && node.firstChild.nodeName === 'TBODY');
}
});
addFeature('innerhtml-div', 'tr', {
test: function() {
return createFromDIV('<tr></tr>', 'tr');
}
});
addFeature('innerhtml-div', 'script', {
test: function() {
return createFromDIV('<script></script>', 'script');
}
});
addFeature('value-set', 'select', {
test: function() {
var node = Y.config.doc.createElement('select');
node.innerHTML = '<option>1</option><option>2</option>';
node.value = '2';
return (node.value && node.value === '2');
}
});
(function(Y) {
var creators = Y_DOM.creators,
create = Y_DOM.create,
re_tbody = /(?:\/(?:thead|tfoot|tbody|caption|col|colgroup)>)+\s*<tbody/,
TABLE_OPEN = '<table>',
TABLE_CLOSE = '</table>';
if (!testFeature('innerhtml', 'table')) {
// TODO: thead/tfoot with nested tbody
// IE adds TBODY when creating TABLE elements (which may share this impl)
creators.tbody = function(html, doc) {
var frag = create(TABLE_OPEN + html + TABLE_CLOSE, doc),
tb = frag.children.tags('tbody')[0];
if (frag.children.length > 1 && tb && !re_tbody.test(html)) {
tb[PARENT_NODE].removeChild(tb); // strip extraneous tbody
}
return frag;
};
}
if (!testFeature('innerhtml-div', 'script')) {
creators.script = function(html, doc) {
var frag = doc.createElement('div');
frag.innerHTML = '-' + html;
frag.removeChild(frag[FIRST_CHILD]);
return frag;
}
Y_DOM.creators.link = Y_DOM.creators.style = Y_DOM.creators.script;
}
if (!testFeature('value-set', 'select')) {
Y_DOM.VALUE_SETTERS.select = function(node, val) {
for (var i = 0, options = node.getElementsByTagName('option'), option;
option = options[i++];) {
if (Y_DOM.getValue(option) === val) {
option.selected = true;
//Y_DOM.setAttribute(option, 'selected', 'selected');
break;
}
}
}
}
Y.mix(Y_DOM.VALUE_GETTERS, {
button: function(node) {
return (node.attributes && node.attributes.value) ? node.attributes.value.value : '';
}
});
Y.mix(Y_DOM.VALUE_SETTERS, {
// IE: node.value changes the button text, which should be handled via innerHTML
button: function(node, val) {
var attr = node.attributes.value;
if (!attr) {
attr = node[OWNER_DOCUMENT].createAttribute('value');
node.setAttributeNode(attr);
}
attr.value = val;
}
});
if (!testFeature('innerhtml-div', 'tr')) {
Y.mix(creators, {
option: function(html, doc) {
return create('<select><option class="yui3-big-dummy" selected></option>' + html + '</select>', doc);
},
tr: function(html, doc) {
return create('<tbody>' + html + '</tbody>', doc);
},
td: function(html, doc) {
return create('<tr>' + html + '</tr>', doc);
},
col: function(html, doc) {
return create('<colgroup>' + html + '</colgroup>', doc);
},
tbody: 'table'
});
Y.mix(creators, {
legend: 'fieldset',
th: creators.td,
thead: creators.tbody,
tfoot: creators.tbody,
caption: creators.tbody,
colgroup: creators.tbody,
optgroup: creators.option
});
}
Y.mix(Y_DOM.VALUE_GETTERS, {
option: function(node) {
var attrs = node.attributes;
return (attrs.value && attrs.value.specified) ? node.value : node.text;
},
select: function(node) {
var val = node.value,
options = node.options;
if (options && options.length) {
// TODO: implement multipe select
if (node.multiple) {
Y.log('multiple select normalization not implemented', 'warn', 'DOM');
} else {
val = Y_DOM.getValue(options[node.selectedIndex]);
}
}
return val;
}
});
})(Y);
Y.DOM = Y_DOM;
})(Y);