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70 lines
2.6 KiB
JavaScript
70 lines
2.6 KiB
JavaScript
"use strict"
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var Vnode = require("../render/vnode")
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var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g
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var selectorCache = {}
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function hyperscript(selector) {
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if (selector == null || typeof selector !== "string" && typeof selector.view !== "function") {
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throw Error("The selector must be either a string or a component.");
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}
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if (typeof selector === "string" && selectorCache[selector] === undefined) {
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var match, tag, 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 attrValue = match[6]
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if (attrValue) attrValue = attrValue.replace(/\\(["'])/g, "$1").replace(/\\\\/g, "\\")
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if (match[4] === "class") classes.push(attrValue)
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else attributes[match[4]] = attrValue || 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 (Array.isArray(children) && 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 Vnode(tag || "div", attrs.key, hasAttrs ? attrs : undefined, childList, text, undefined)
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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 && !Array.isArray(arguments[1])) {
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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 = Array.isArray(arguments[childrenIndex]) ? 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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if (typeof selector === "string") return selectorCache[selector](attrs || {}, Vnode.normalizeChildren(children))
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return Vnode(selector, attrs && attrs.key, attrs || {}, Vnode.normalizeChildren(children), undefined, undefined)
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}
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module.exports = hyperscript
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