Locally add prismjs

node_modules/prismjs/plugins/keep-markup/prism-keep-markup.js

@@ -0,0 +1,126 @@
+(function () {
+
+	if (typeof Prism === 'undefined' || typeof document === 'undefined' || !document.createRange) {
+		return;
+	}
+
+	Prism.plugins.KeepMarkup = true;
+
+	Prism.hooks.add('before-highlight', function (env) {
+		if (!env.element.children.length) {
+			return;
+		}
+
+		if (!Prism.util.isActive(env.element, 'keep-markup', true)) {
+			return;
+		}
+
+		var dropTokens = Prism.util.isActive(env.element, 'drop-tokens', false);
+		/**
+		 * Returns whether the given element should be kept.
+		 *
+		 * @param {HTMLElement} element
+		 * @returns {boolean}
+		 */
+		function shouldKeep(element) {
+			if (dropTokens && element.nodeName.toLowerCase() === 'span' && element.classList.contains('token')) {
+				return false;
+			}
+			return true;
+		}
+
+		var pos = 0;
+		var data = [];
+		function processElement(element) {
+			if (!shouldKeep(element)) {
+				// don't keep this element and just process its children
+				processChildren(element);
+				return;
+			}
+
+			var o = {
+				// Store original element so we can restore it after highlighting
+				element: element,
+				posOpen: pos
+			};
+			data.push(o);
+
+			processChildren(element);
+
+			o.posClose = pos;
+		}
+		function processChildren(element) {
+			for (var i = 0, l = element.childNodes.length; i < l; i++) {
+				var child = element.childNodes[i];
+				if (child.nodeType === 1) { // element
+					processElement(child);
+				} else if (child.nodeType === 3) { // text
+					pos += child.data.length;
+				}
+			}
+		}
+		processChildren(env.element);
+
+		if (data.length) {
+			// data is an array of all existing tags
+			env.keepMarkup = data;
+		}
+	});
+
+	Prism.hooks.add('after-highlight', function (env) {
+		if (env.keepMarkup && env.keepMarkup.length) {
+
+			var walk = function (elt, nodeState) {
+				for (var i = 0, l = elt.childNodes.length; i < l; i++) {
+
+					var child = elt.childNodes[i];
+
+					if (child.nodeType === 1) { // element
+						if (!walk(child, nodeState)) {
+							return false;
+						}
+
+					} else if (child.nodeType === 3) { // text
+						if (!nodeState.nodeStart && nodeState.pos + child.data.length > nodeState.node.posOpen) {
+							// We found the start position
+							nodeState.nodeStart = child;
+							nodeState.nodeStartPos = nodeState.node.posOpen - nodeState.pos;
+						}
+						if (nodeState.nodeStart && nodeState.pos + child.data.length >= nodeState.node.posClose) {
+							// We found the end position
+							nodeState.nodeEnd = child;
+							nodeState.nodeEndPos = nodeState.node.posClose - nodeState.pos;
+						}
+
+						nodeState.pos += child.data.length;
+					}
+
+					if (nodeState.nodeStart && nodeState.nodeEnd) {
+						// Select the range and wrap it with the element
+						var range = document.createRange();
+						range.setStart(nodeState.nodeStart, nodeState.nodeStartPos);
+						range.setEnd(nodeState.nodeEnd, nodeState.nodeEndPos);
+						nodeState.node.element.innerHTML = '';
+						nodeState.node.element.appendChild(range.extractContents());
+						range.insertNode(nodeState.node.element);
+						range.detach();
+
+						// Process is over
+						return false;
+					}
+				}
+				return true;
+			};
+
+			// For each tag, we walk the DOM to reinsert it
+			env.keepMarkup.forEach(function (node) {
+				walk(env.element, {
+					node: node,
+					pos: 0
+				});
+			});
+			// Store new highlightedCode for later hooks calls
+			env.highlightedCode = env.element.innerHTML;
+		}
+	});
+}());