75 lines
No EOL
2.6 KiB
JavaScript
75 lines
No EOL
2.6 KiB
JavaScript
"use strict"
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var normalizeChildren = require("../render/normalizeChildren")
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var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[.+?\])/g, attrParser = /\[(.+?)(?:\s*=\s*("|'|)(.*?)\2)?\]/
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var selectorCache = {}
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function hyperscript(selector) {
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if (selectorCache[selector] === undefined) {
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var match, tag, id, classes = [], attributes = {}
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while (match = selectorParser.exec(selector)) {
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var type = match[1], value = match[2]
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if (type === "" && value !== "") tag = value
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else if (type === "#") attributes.id = value
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else if (type === ".") classes.push(value)
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else if (match[3][0] === "[") {
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var pair = attrParser.exec(match[3])
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attributes[pair[1]] = pair[3] || true
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}
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}
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if (classes.length > 0) attributes.className = classes.join(" ")
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selectorCache[selector] = function(attrs, children) {
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var hasAttrs = false, childList, text
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var className = attrs.className || attrs.class
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for (var key in attributes) attrs[key] = attributes[key]
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if (className !== undefined) {
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if (attrs.class !== undefined) {
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attrs.class = undefined
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attrs.className = className
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}
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if (attributes.className !== undefined) attrs.className = attributes.className + " " + className
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}
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for (var key in attrs) {
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if (key !== "key") {
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hasAttrs = true
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break
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}
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}
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if (children instanceof Array && children.length == 1 && children[0] != null && children[0].tag === "#") text = children[0].children
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else childList = children
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return namespace({tag: tag || "div", key: attrs.key, attrs: hasAttrs ? attrs : undefined, children: childList, text: text})
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}
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}
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var attrs, children, childrenIndex
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if (arguments[1] == null || typeof arguments[1] === "object" && arguments[1].tag === undefined && !(arguments[1] instanceof Array)) {
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attrs = arguments[1]
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childrenIndex = 2
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}
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else childrenIndex = 1
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if (arguments.length === childrenIndex + 1) {
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children = arguments[childrenIndex] instanceof Array ? arguments[childrenIndex] : [arguments[childrenIndex]]
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}
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else {
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children = []
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for (var i = childrenIndex; i < arguments.length; i++) children.push(arguments[i])
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}
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return selectorCache[selector](attrs || {}, normalizeChildren(children))
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}
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function namespace(vnode) {
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switch (vnode.tag) {
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case "svg": changeNS("http://www.w3.org/2000/svg", vnode); break
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case "math": changeNS("http://www.w3.org/1998/Math/MathML", vnode); break
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}
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return vnode
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}
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function changeNS(ns, vnode) {
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vnode.ns = ns
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if (vnode.children != null) {
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for (var i = 0; i < vnode.children.length; i++) changeNS(ns, vnode.children[i])
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}
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}
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module.exports = hyperscript |