100 lines
2.7 KiB
JavaScript
100 lines
2.7 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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var hasOwn = {}.hasOwnProperty
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function compileSelector(selector) {
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var match, tag = "div", classes = [], attrs = {}
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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 === "#") attrs.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 attrs[match[4]] = attrValue || true
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}
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}
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if (classes.length > 0) attrs.className = classes.join(" ")
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return selectorCache[selector] = {tag: tag, attrs: attrs}
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}
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function execSelector(state, 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 state.attrs) {
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if (hasOwn.call(state.attrs, key)) {
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attrs[key] = state.attrs[key]
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}
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}
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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 (state.attrs.className != null) {
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attrs.className = state.attrs.className + " " + className
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}
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}
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for (var key in attrs) {
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if (hasOwn.call(attrs, key) && 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 === "#") {
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text = children[0].children
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} else {
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childList = children
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}
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return Vnode(state.tag, attrs.key, hasAttrs ? attrs : undefined, childList, text)
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}
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function hyperscript(selector) {
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// Because sloppy mode sucks
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var attrs = arguments[1], start = 2, children
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if (selector == null || typeof selector !== "string" && typeof selector !== "function" && 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") {
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var cached = selectorCache[selector] || compileSelector(selector)
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}
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if (attrs == null) {
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attrs = {}
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} else if (typeof attrs !== "object" || attrs.tag != null || Array.isArray(attrs)) {
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attrs = {}
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start = 1
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}
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if (arguments.length === start + 1) {
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children = arguments[start]
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if (!Array.isArray(children)) children = [children]
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} else {
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children = []
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while (start < arguments.length) children.push(arguments[start++])
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}
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var normalized = Vnode.normalizeChildren(children)
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if (typeof selector === "string") {
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return execSelector(cached, attrs, normalized)
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} else {
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return Vnode(selector, attrs.key, attrs, normalized)
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}
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}
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module.exports = hyperscript
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