Current Dev State

static/js/ketcher2/node_modules/preact/src/dom/index.js

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+import { IS_NON_DIMENSIONAL } from '../constants';
+import options from '../options';
+
+
+/** Create an element with the given nodeName.
+ *	@param {String} nodeName
+ *	@param {Boolean} [isSvg=false]	If `true`, creates an element within the SVG namespace.
+ *	@returns {Element} node
+ */
+export function createNode(nodeName, isSvg) {
+	let node = isSvg ? document.createElementNS('http://www.w3.org/2000/svg', nodeName) : document.createElement(nodeName);
+	node.normalizedNodeName = nodeName;
+	return node;
+}
+
+
+/** Remove a child node from its parent if attached.
+ *	@param {Element} node		The node to remove
+ */
+export function removeNode(node) {
+	if (node.parentNode) node.parentNode.removeChild(node);
+}
+
+
+/** Set a named attribute on the given Node, with special behavior for some names and event handlers.
+ *	If `value` is `null`, the attribute/handler will be removed.
+ *	@param {Element} node	An element to mutate
+ *	@param {string} name	The name/key to set, such as an event or attribute name
+ *	@param {any} old	The last value that was set for this name/node pair
+ *	@param {any} value	An attribute value, such as a function to be used as an event handler
+ *	@param {Boolean} isSvg	Are we currently diffing inside an svg?
+ *	@private
+ */
+export function setAccessor(node, name, old, value, isSvg) {
+	if (name==='className') name = 'class';
+
+
+	if (name==='key') {
+		// ignore
+	}
+	else if (name==='ref') {
+		if (old) old(null);
+		if (value) value(node);
+	}
+	else if (name==='class' && !isSvg) {
+		node.className = value || '';
+	}
+	else if (name==='style') {
+		if (!value || typeof value==='string' || typeof old==='string') {
+			node.style.cssText = value || '';
+		}
+		if (value && typeof value==='object') {
+			if (typeof old!=='string') {
+				for (let i in old) if (!(i in value)) node.style[i] = '';
+			}
+			for (let i in value) {
+				node.style[i] = typeof value[i]==='number' && IS_NON_DIMENSIONAL.test(i)===false ? (value[i]+'px') : value[i];
+			}
+		}
+	}
+	else if (name==='dangerouslySetInnerHTML') {
+		if (value) node.innerHTML = value.__html || '';
+	}
+	else if (name[0]=='o' && name[1]=='n') {
+		let useCapture = name !== (name=name.replace(/Capture$/, ''));
+		name = name.toLowerCase().substring(2);
+		if (value) {
+			if (!old) node.addEventListener(name, eventProxy, useCapture);
+		}
+		else {
+			node.removeEventListener(name, eventProxy, useCapture);
+		}
+		(node._listeners || (node._listeners = {}))[name] = value;
+	}
+	else if (name!=='list' && name!=='type' && !isSvg && name in node) {
+		setProperty(node, name, value==null ? '' : value);
+		if (value==null || value===false) node.removeAttribute(name);
+	}
+	else {
+		let ns = isSvg && (name !== (name = name.replace(/^xlink\:?/, '')));
+		if (value==null || value===false) {
+			if (ns) node.removeAttributeNS('http://www.w3.org/1999/xlink', name.toLowerCase());
+			else node.removeAttribute(name);
+		}
+		else if (typeof value!=='function') {
+			if (ns) node.setAttributeNS('http://www.w3.org/1999/xlink', name.toLowerCase(), value);
+			else node.setAttribute(name, value);
+		}
+	}
+}
+
+
+/** Attempt to set a DOM property to the given value.
+ *	IE & FF throw for certain property-value combinations.
+ */
+function setProperty(node, name, value) {
+	try {
+		node[name] = value;
+	} catch (e) { }
+}
+
+
+/** Proxy an event to hooked event handlers
+ *	@private
+ */
+function eventProxy(e) {
+	return this._listeners[e.type](options.event && options.event(e) || e);
+}