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sample/prod/talk/bundle/mithril-2.2.2/render/hyperscript.js

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+"use strict"
+
+var Vnode = require("./vnode")
+var hyperscriptVnode = require("./hyperscriptVnode")
+var hasOwn = require("../util/hasOwn")
+
+var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g
+var selectorCache = {}
+
+function isEmpty(object) {
+	for (var key in object) if (hasOwn.call(object, key)) return false
+	return true
+}
+
+function compileSelector(selector) {
+	var match, tag = "div", classes = [], attrs = {}
+	while (match = selectorParser.exec(selector)) {
+		var type = match[1], value = match[2]
+		if (type === "" && value !== "") tag = value
+		else if (type === "#") attrs.id = value
+		else if (type === ".") classes.push(value)
+		else if (match[3][0] === "[") {
+			var attrValue = match[6]
+			if (attrValue) attrValue = attrValue.replace(/\\(["'])/g, "$1").replace(/\\\\/g, "\\")
+			if (match[4] === "class") classes.push(attrValue)
+			else attrs[match[4]] = attrValue === "" ? attrValue : attrValue || true
+		}
+	}
+	if (classes.length > 0) attrs.className = classes.join(" ")
+	return selectorCache[selector] = {tag: tag, attrs: attrs}
+}
+
+function execSelector(state, vnode) {
+	var attrs = vnode.attrs
+	var hasClass = hasOwn.call(attrs, "class")
+	var className = hasClass ? attrs.class : attrs.className
+
+	vnode.tag = state.tag
+	vnode.attrs = {}
+
+	if (!isEmpty(state.attrs) && !isEmpty(attrs)) {
+		var newAttrs = {}
+
+		for (var key in attrs) {
+			if (hasOwn.call(attrs, key)) newAttrs[key] = attrs[key]
+		}
+
+		attrs = newAttrs
+	}
+
+	for (var key in state.attrs) {
+		if (hasOwn.call(state.attrs, key) && key !== "className" && !hasOwn.call(attrs, key)){
+			attrs[key] = state.attrs[key]
+		}
+	}
+	if (className != null || state.attrs.className != null) attrs.className =
+		className != null
+			? state.attrs.className != null
+				? String(state.attrs.className) + " " + String(className)
+				: className
+			: state.attrs.className != null
+				? state.attrs.className
+				: null
+
+	if (hasClass) attrs.class = null
+
+	for (var key in attrs) {
+		if (hasOwn.call(attrs, key) && key !== "key") {
+			vnode.attrs = attrs
+			break
+		}
+	}
+
+	return vnode
+}
+
+function hyperscript(selector) {
+	if (selector == null || typeof selector !== "string" && typeof selector !== "function" && typeof selector.view !== "function") {
+		throw Error("The selector must be either a string or a component.");
+	}
+
+	var vnode = hyperscriptVnode.apply(1, arguments)
+
+	if (typeof selector === "string") {
+		vnode.children = Vnode.normalizeChildren(vnode.children)
+		if (selector !== "[") return execSelector(selectorCache[selector] || compileSelector(selector), vnode)
+	}
+
+	vnode.tag = selector
+	return vnode
+}
+
+module.exports = hyperscript