Syntaxify

Universal syntax highlighting
Versione datata 24/06/2015. Vedi la nuova versione l'ultima versione.
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// ==UserScript==
// @name Syntaxify
// @description Universal syntax highlighting
// @namespace http://rob-bolton.co.uk
// @version 1.2
// @include http*
// @grant GM_addStyle
// @grant GM_getResourceText
// @require http://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.6/highlight.min.js
// @resource highlightJsCss https://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.6/styles/monokai.min.css
// ==/UserScript==
//

var tagsToSearch = ["pre", "code"];

GM_addStyle(GM_getResourceText("highlightJsCss"));

var menuCounter = 0;

function wrapSelection() {
	var selection = window.getSelection();
	if(selection.rangeCount && tagsToSearch.indexOf(selection.anchorNode.nodeName) == -1) {
		range = selection.getRangeAt(0);
		if(range) {
			range.surroundContents(new CodeContainer());
		}
	}
}

function CodeContainer() {
	var container = document.createElement("code");
	var menu = addSyntaxMenuForNode(container);
	
	var menuItem = document.createElement("menuitem");
	menuItem.setAttribute("label", "Unwrap code");
	menuItem.addEventListener("click", function(){
		var parent = container.parentNode;
		var newTextNode = document.createTextNode(container.textContent);
		parent.insertBefore(newTextNode, container);
		parent.removeChild(container);
	});
	
	menu.appendChild(menuItem);
	
	return container;
}

function SyntaxifyMenu(node) {
	var modified = false;
	var originalNode;
	var currentNode = node;
	var menu;
	
	var nodeMenuId = node.getAttribute("contextmenu");
	if(!nodeMenuId) {
		menu = document.createElement("menu");
		menu.setAttribute("type", "context");
		menu.setAttribute("id", "SyntaxifyMenu" + menuCounter++);
	} else {
		menu = document.getElementById(nodeMenuId);
	}
	
	var menuItem = document.createElement("menuitem");
	menuItem.setAttribute("label", "Syntaxify - Highlight");
	
	var toggleHighlight = function() {
		if(modified) {
			var parent = currentNode.parentNode;
			parent.insertBefore(originalNode, currentNode);
			parent.removeChild(currentNode);
			currentNode = originalNode;
			menuItem.setAttribute("label", "Syntaxify - Highlight");
			modified = false;
		} else {
			originalNode = currentNode.cloneNode(true);
			hljs.highlightBlock(currentNode);
			menuItem.setAttribute("label", "Syntaxify - UnHighlight");
			modified = true;
		}
	}
	
	
	menuItem.addEventListener("click", toggleHighlight, false);
	
	menu.appendChild(menuItem);
	return menu;
}

function addSyntaxMenuForNode(node) {
	var menu = new SyntaxifyMenu(node);
	document.body.appendChild(menu);
	node.setAttribute("contextmenu", menu.getAttribute("id"));
	return menu;
}

var syntaxableElements = [];
for(var i=0; i<tagsToSearch.length; i++) {
	var tagsFound = document.getElementsByTagName(tagsToSearch[i]);
	for(var j=0; j<tagsFound.length; j++) {
		syntaxableElements.push(tagsFound.item(j));
	}
}

if(syntaxableElements) {
	for(var i=0; i<(syntaxableElements.length || 0); i++) {
		addSyntaxMenuForNode(syntaxableElements[i]);
	}
}

var body = document.body;
var bodyMenu;
var bodyMenuId = body.getAttribute("contextmenu");
if(!bodyMenuId) {
	bodyMenu = document.createElement("menu");
	bodyMenu.setAttribute("type", "context");
	bodyMenu.setAttribute("id", "SyntaxifyMenuMain");
} else {
	bodyMenu = document.getElementById(bodyMenuId);
}

var wrapItem = document.createElement("menuitem");
wrapItem.setAttribute("label", "Syntaxify - Wrap with <code>");
wrapItem.addEventListener("click", wrapSelection, false);

bodyMenu.appendChild(wrapItem);
body.appendChild(bodyMenu);
body.setAttribute("contextmenu", bodyMenu.getAttribute("id"));