150 lines
3.6 KiB
JavaScript
150 lines
3.6 KiB
JavaScript
var _ = require('underscore'),
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utils = require('../utils'),
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isTag = utils.isTag,
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decode = utils.decode,
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encode = utils.encode,
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rspace = /\s+/,
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// Attributes that are booleans
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rboolean = /^(?:autofocus|autoplay|async|checked|controls|defer|disabled|hidden|loop|multiple|open|readonly|required|scoped|selected)$/i;
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var setAttr = function(el, name, value) {
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if (typeof name === 'object') return _.extend(el.attribs, name);
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if (value === null) {
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removeAttribute(el, name);
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} else {
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el.attribs[name] = encode(value);
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}
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return el.attribs;
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};
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var attr = exports.attr = function(name, value) {
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var elem = this[0];
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if (!elem || !isTag(elem))
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return undefined;
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if (!elem.attribs) {
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elem.attribs = {};
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}
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// Return the entire attribs object if no attribute specified
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if (!name) {
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for (var a in elem.attribs) {
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elem.attribs[a] = decode(elem.attribs[a]);
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}
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return elem.attribs;
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}
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// Set the value (with attr map support)
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if (typeof name === 'object' || value !== undefined) {
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this.each(function(i, el) {
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el.attribs = setAttr(el, name, value);
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});
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return this;
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} else if (Object.hasOwnProperty.call(elem.attribs, name)) {
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// Get the (decoded) attribute
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return decode(elem.attribs[name]);
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}
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};
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/**
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* Remove an attribute
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*/
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var removeAttribute = function(elem, name) {
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if (!isTag(elem.type) || !elem.attribs || !Object.hasOwnProperty.call(elem.attribs, name))
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return;
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if (rboolean.test(elem.attribs[name]))
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elem.attribs[name] = false;
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else
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delete elem.attribs[name];
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};
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var removeAttr = exports.removeAttr = function(name) {
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this.each(function(i, elem) {
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removeAttribute(elem, name);
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});
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return this;
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};
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var hasClass = exports.hasClass = function(className) {
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return _.any(this, function(elem) {
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var attrs = elem.attribs;
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return attrs && _.contains((attrs['class'] || '').split(rspace), className);
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});
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};
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var addClass = exports.addClass = function(value) {
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// Support functions
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if (_.isFunction(value)) {
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this.each(function(i) {
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var className = this.attr('class') || '';
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this.addClass(value.call(this, i, className));
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});
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}
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// Return if no value or not a string or function
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if (!value || !_.isString(value)) return this;
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var classNames = value.split(rspace),
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numElements = this.length,
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numClasses,
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setClass,
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$elem;
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for (var i = 0; i < numElements; i++) {
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$elem = this.make(this[i]);
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// If selected element isnt a tag, move on
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if (!isTag(this[i])) continue;
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// If we don't already have classes
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if (!$elem.attr('class')) {
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$elem.attr('class', classNames.join(' ').trim());
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} else {
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setClass = ' ' + $elem.attr('class') + ' ';
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numClasses = classNames.length;
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// Check if class already exists
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for (var j = 0; j < numClasses; j++) {
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if (!~setClass.indexOf(' ' + classNames[j] + ' '))
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setClass += classNames[j] + ' ';
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}
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$elem.attr('class', setClass.trim());
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}
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}
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return this;
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};
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var removeClass = exports.removeClass = function(value) {
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var split = function(className) {
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return className ? className.trim().split(rspace) : [];
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};
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var classes = split(value);
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// Handle if value is a function
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if (_.isFunction(value)) {
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return this.each(function(i, el) {
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this.removeClass(value.call(this, i, el.attribs['class'] || ''));
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});
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}
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return this.each(function(i, el) {
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if (!isTag(el)) return;
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el.attribs['class'] = (!value) ? '' : _.reject(
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split(el.attribs['class']),
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function(name) { return _.contains(classes, name); }
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).join(' ');
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});
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};
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