Diffstat (limited to 'frontend/gamma/js/Zepto/selector.js') (more/less context) (ignore whitespace changes)
-rw-r--r-- | frontend/gamma/js/Zepto/selector.js | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/frontend/gamma/js/Zepto/selector.js b/frontend/gamma/js/Zepto/selector.js new file mode 100644 index 0000000..c0b035a --- a/dev/null +++ b/frontend/gamma/js/Zepto/selector.js @@ -0,0 +1,81 @@ +;(function($){ + var zepto = $.zepto, oldQsa = zepto.qsa, oldMatches = zepto.matches + + function visible(elem){ + elem = $(elem) + return !!(elem.width() || elem.height()) && elem.css("display") !== "none" + } + + // Implements a subset from: + // http://api.jquery.com/category/selectors/jquery-selector-extensions/ + // + // Each filter function receives the current index, all nodes in the + // considered set, and a value if there were parentheses. The value + // of `this` is the node currently being considered. The function returns the + // resulting node(s), null, or undefined. + // + // Complex selectors are not supported: + // li:has(label:contains("foo")) + li:has(label:contains("bar")) + // ul.inner:first > li + var filters = $.expr[':'] = { + visible: function(){ if (visible(this)) return this }, + hidden: function(){ if (!visible(this)) return this }, + selected: function(){ if (this.selected) return this }, + checked: function(){ if (this.checked) return this }, + parent: function(){ return this.parentNode }, + first: function(idx){ if (idx === 0) return this }, + last: function(idx, nodes){ if (idx === nodes.length - 1) return this }, + eq: function(idx, _, value){ if (idx === value) return this }, + contains: function(idx, _, text){ if ($(this).text().indexOf(text) > -1) return this }, + has: function(idx, _, sel){ if (zepto.qsa(this, sel).length) return this } + } + + var filterRe = new RegExp('(.*):(\\w+)(?:\\(([^)]+)\\))?$\\s*'), + childRe = /^\s*>/, + classTag = 'Zepto' + (+new Date()) + + function process(sel, fn) { + // quote the hash in `a[href^=#]` expression + sel = sel.replace(/=#\]/g, '="#"]') + var filter, arg, match = filterRe.exec(sel) + if (match && match[2] in filters) { + var filter = filters[match[2]], arg = match[3] + sel = match[1] + if (arg) { + var num = Number(arg) + if (isNaN(num)) arg = arg.replace(/^["']|["']$/g, '') + else arg = num + } + } + return fn(sel, filter, arg) + } + + zepto.qsa = function(node, selector) { + return process(selector, function(sel, filter, arg){ + try { + var taggedParent + if (!sel && filter) sel = '*' + else if (childRe.test(sel)) + // support "> *" child queries by tagging the parent node with a + // unique class and prepending that classname onto the selector + taggedParent = $(node).addClass(classTag), sel = '.'+classTag+' '+sel + + var nodes = oldQsa(node, sel) + } catch(e) { + console.error('error performing selector: %o', selector) + throw e + } finally { + if (taggedParent) taggedParent.removeClass(classTag) + } + return !filter ? nodes : + zepto.uniq($.map(nodes, function(n, i){ return filter.call(n, i, nodes, arg) })) + }) + } + + zepto.matches = function(node, selector){ + return process(selector, function(sel, filter, arg){ + return (!sel || oldMatches(node, sel)) && + (!filter || filter.call(node, null, arg) === node) + }) + } +})(Zepto) |