PrettifyHelper.java

/*
 *  Copyright 2012 GWT-Bootstrap
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.github.gwtbootstrap.client.ui.resources.prettify;

import java.util.ArrayList;
import java.util.List;

import com.github.gwtbootstrap.client.ui.resources.JavaScriptInjector;
import com.google.gwt.dom.client.StyleInjector;
import com.google.gwt.resources.client.TextResource;
import com.google.gwt.user.client.ui.Widget;

/**
 * A helper class to inject and configure Google Code Prettify in our code
 * components.
 * 
 * @since 2.0.4.0
 * 
 * @author Carlos Alexandro Becker
 * 
 */
public class PrettifyHelper implements HasProgrammingLanguage {

	static {
		JavaScriptInjector.inject(PrettifyResources.RESOURCES.prettify_js()
				.getText());
		StyleInjector.inject(PrettifyResources.RESOURCES.prettify_css()
				.getText());
	}

	static List<Integer> importedLangs = new ArrayList<Integer>();
	private final Widget w;

	public PrettifyHelper(Widget w) {
		super();
		this.w = w;
	}

	/**
	 * will import the language if needed.
	 */
	public void setLang(String lang) {

		int i = PrettifyResources.speciallangs.indexOf(lang);

		// XXX thats very very very very ugly, sorry.

		if (i > -1 && !importedLangs.contains(i)) {
			TextResource tr = null;
			switch (i) {
				case 0:
					tr = PrettifyResources.RESOURCES.apollo();
					break;
				case 1:
					tr = PrettifyResources.RESOURCES.clj();
					break;
				case 2:
					tr = PrettifyResources.RESOURCES.css();
					break;
				case 3:
					tr = PrettifyResources.RESOURCES.go();
					break;
				case 4:
					tr = PrettifyResources.RESOURCES.hs();
					break;
				case 5:
					tr = PrettifyResources.RESOURCES.lisp();
					break;
				case 6:
					tr = PrettifyResources.RESOURCES.lua();
					break;
				case 7:
					tr = PrettifyResources.RESOURCES.ml();
					break;
				case 8:
					tr = PrettifyResources.RESOURCES.ml();
					break;
				case 9:
					tr = PrettifyResources.RESOURCES.n();
					break;
				case 10:
					tr = PrettifyResources.RESOURCES.proto();
					break;
				case 11:
					tr = PrettifyResources.RESOURCES.scala();
					break;
				case 12:
					tr = PrettifyResources.RESOURCES.sql();
					break;
				case 13:
					tr = PrettifyResources.RESOURCES.tex();
					break;
				case 14:
					tr = PrettifyResources.RESOURCES.vb();
					break;
				case 15:
					tr = PrettifyResources.RESOURCES.vhdl();
					break;
				case 16:
					tr = PrettifyResources.RESOURCES.wiki();
					break;
				case 17:
					tr = PrettifyResources.RESOURCES.xq();
					break;

				default:
					break;
			}
			if (tr != null) {
				JavaScriptInjector.inject(tr.getText());
				importedLangs.add(i);
			}
		}
	}

	/**
	 * Configures prettyprint without line numbers.
	 */
	public void configure() {
		configure(false);
	}

	/**
	 * Configures prettyprint with optional line numbers.
	 * 
	 * @param showLineNumber
	 *            <code>true</code> if line numbers should be shown
	 */
	public void configure(boolean showLineNumber) {
		w.setStyleName("prettyprint");
		if (showLineNumber)
			w.addStyleName("linenums");
		setup();
	}

	private native void setup() /*-{
		$wnd.prettyPrint();
	}-*/;
}