bundles/org.eclipse.jst.jsp.ui/src/org/eclipse/jst/jsp/ui/internal/taginfo/HTMLPrinter.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.jsp.ui.internal.taginfo;


 import java.io.IOException;
 import java.io.Reader;
 import java.net.URL;

 import org.eclipse.jst.jsp.ui.internal.Logger;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Display;


 /**
  * Provides a set of convenience methods for creating HTML pages.
  *
  * Based on org.eclipse.jdt.internal.ui.text.HTMLPrinter
  */
 class HTMLPrinter {

 	static RGB BG_COLOR_RGB = null;

 	static {
 		// try to do in advance
 		getSystemBGColor();
 	}

 	private static RGB getSystemBGColor() {
 		RGB result = null;
 		if (BG_COLOR_RGB == null) {
 			final Display display = Display.getCurrent();
 			if (display != null && !display.isDisposed()) {

 				display.asyncExec(new Runnable() {
 					public void run() {
 						if (display != null && !display.isDisposed()) {
 							BG_COLOR_RGB = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
 						}
 					}
 				});

 			}
 		}
 		else {
 			result = BG_COLOR_RGB;
 		}
 		return result;
 	}

 	private HTMLPrinter() {
 		super();
 	}

 	private static String replace(String text, char c, String s) {

 		int previous = 0;
 		int current = text.indexOf(c, previous);

 		if (current == -1)
 			return text;

 		StringBuffer buffer = new StringBuffer();
 		while (current > -1) {
 			buffer.append(text.substring(previous, current));
 			buffer.append(s);
 			previous = current + 1;
 			current = text.indexOf(c, previous);
 		}
 		buffer.append(text.substring(previous));

 		return buffer.toString();
 	}

 	public static String convertToHTMLContent(String content) {
 		content = replace(content, '<', "&lt;"); //$NON-NLS-1$
 		return replace(content, '>', "&gt;"); //$NON-NLS-1$
 	}

 	static String read(Reader rd) {

 		StringBuffer buffer = new StringBuffer();
 		char[] readBuffer = new char[2048];

 		try {
 			int n = rd.read(readBuffer);
 			while (n > 0) {
 				buffer.append(readBuffer, 0, n);
 				n = rd.read(readBuffer);
 			}
 			return buffer.toString();
 		}
 		catch (IOException x) {
 			// never expected
 			Logger.logException(x);
 		}

 		return null;
 	}

 	public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, URL styleSheetURL) {

 		if (bgRGB == null)
 			insertPageProlog(buffer, position, styleSheetURL);
 		else {
 			StringBuffer pageProlog = new StringBuffer(300);

 			pageProlog.append("<html>"); //$NON-NLS-1$

 			appendStyleSheetLink(pageProlog, styleSheetURL);

 			pageProlog.append("<body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
 			appendColor(pageProlog, bgRGB);
 			pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$

 			buffer.insert(position, pageProlog.toString());
 		}
 	}

 	public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
 		if (bgRGB == null)
 			insertPageProlog(buffer, position);
 		else {
 			StringBuffer pageProlog = new StringBuffer(60);
 			pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
 			appendColor(pageProlog, bgRGB);
 			pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$
 			buffer.insert(position, pageProlog.toString());
 		}
 	}

 	private static void appendStyleSheetLink(StringBuffer buffer, URL styleSheetURL) {
 		if (styleSheetURL == null)
 			return;

 		buffer.append("<head>"); //$NON-NLS-1$

 		buffer.append("<LINK REL=\"stylesheet\" HREF= \""); //$NON-NLS-1$
 		buffer.append(styleSheetURL);
 		buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$

 		buffer.append("</head>"); //$NON-NLS-1$
 	}

 	private static void appendColor(StringBuffer buffer, RGB rgb) {
 		buffer.append('#');
 		buffer.append(Integer.toHexString(rgb.red));
 		buffer.append(Integer.toHexString(rgb.green));
 		buffer.append(Integer.toHexString(rgb.blue));
 	}

 	public static void insertPageProlog(StringBuffer buffer, int position) {
 		insertPageProlog(buffer, position, getBgColor()); //$NON-NLS-1$
 	}

 	public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
 		insertPageProlog(buffer, position, getBgColor(), styleSheetURL); //$NON-NLS-1$
 	}

 	static RGB getBgColor() {
 		RGB result = getSystemBGColor();
 		if (result == null) {
 			// use RGB value of default info bg color
 			// on WindowsXP
 			result = new RGB(255, 255, 225);
 		}
 		return result;

 	}

 	public static void addPageProlog(StringBuffer buffer) {
 		insertPageProlog(buffer, buffer.length());
 	}

 	public static void addPageEpilog(StringBuffer buffer) {
 		buffer.append("</font></body></html>"); //$NON-NLS-1$
 	}

 	public static void startBulletList(StringBuffer buffer) {
 		buffer.append("<ul>"); //$NON-NLS-1$
 	}

 	public static void endBulletList(StringBuffer buffer) {
 		buffer.append("</ul>"); //$NON-NLS-1$
 	}

 	public static void addBullet(StringBuffer buffer, String bullet) {
 		if (bullet != null) {
 			buffer.append("<li>"); //$NON-NLS-1$
 			buffer.append(bullet);
 			buffer.append("</li>"); //$NON-NLS-1$
 		}
 	}

 	public static void addSmallHeader(StringBuffer buffer, String header) {
 		if (header != null) {
 			buffer.append("<h5>"); //$NON-NLS-1$
 			buffer.append(header);
 			buffer.append("</h5>"); //$NON-NLS-1$
 		}
 	}

 	public static void addParagraph(StringBuffer buffer, String paragraph) {
 		if (paragraph != null) {
 			buffer.append("<p>"); //$NON-NLS-1$
 			buffer.append(paragraph);
 		}
 	}

 	public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
 		if (paragraphReader != null)
 			addParagraph(buffer, read(paragraphReader));
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.jsp.ui.internal.taginfo;


	import java.io.IOException;
	import java.io.Reader;
	import java.net.URL;

	import org.eclipse.jst.jsp.ui.internal.Logger;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.RGB;
	import org.eclipse.swt.widgets.Display;


	/**
	* Provides a set of convenience methods for creating HTML pages.
	*
	* Based on org.eclipse.jdt.internal.ui.text.HTMLPrinter
	*/
	class HTMLPrinter {

	static RGB BG_COLOR_RGB = null;

	static {
	// try to do in advance
	getSystemBGColor();
	}

	private static RGB getSystemBGColor() {
	RGB result = null;
	if (BG_COLOR_RGB == null) {
	final Display display = Display.getCurrent();
	if (display != null && !display.isDisposed()) {

	display.asyncExec(new Runnable() {
	public void run() {
	if (display != null && !display.isDisposed()) {
	BG_COLOR_RGB = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
	}
	}
	});

	}
	}
	else {
	result = BG_COLOR_RGB;
	}
	return result;
	}

	private HTMLPrinter() {
	super();
	}

	private static String replace(String text, char c, String s) {

	int previous = 0;
	int current = text.indexOf(c, previous);

	if (current == -1)
	return text;

	StringBuffer buffer = new StringBuffer();
	while (current > -1) {
	buffer.append(text.substring(previous, current));
	buffer.append(s);
	previous = current + 1;
	current = text.indexOf(c, previous);
	}
	buffer.append(text.substring(previous));

	return buffer.toString();
	}

	public static String convertToHTMLContent(String content) {
	content = replace(content, '<', "<"); //$NON-NLS-1$
	return replace(content, '>', ">"); //$NON-NLS-1$
	}

	static String read(Reader rd) {

	StringBuffer buffer = new StringBuffer();
	char[] readBuffer = new char[2048];

	try {
	int n = rd.read(readBuffer);
	while (n > 0) {
	buffer.append(readBuffer, 0, n);
	n = rd.read(readBuffer);
	}
	return buffer.toString();
	}
	catch (IOException x) {
	// never expected
	Logger.logException(x);
	}

	return null;
	}

	public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, URL styleSheetURL) {

	if (bgRGB == null)
	insertPageProlog(buffer, position, styleSheetURL);
	else {
	StringBuffer pageProlog = new StringBuffer(300);

	pageProlog.append("<html>"); //$NON-NLS-1$

	appendStyleSheetLink(pageProlog, styleSheetURL);

	pageProlog.append("<body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
	appendColor(pageProlog, bgRGB);
	pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$

	buffer.insert(position, pageProlog.toString());
	}
	}

	public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
	if (bgRGB == null)
	insertPageProlog(buffer, position);
	else {
	StringBuffer pageProlog = new StringBuffer(60);
	pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
	appendColor(pageProlog, bgRGB);
	pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$
	buffer.insert(position, pageProlog.toString());
	}
	}

	private static void appendStyleSheetLink(StringBuffer buffer, URL styleSheetURL) {
	if (styleSheetURL == null)
	return;

	buffer.append("<head>"); //$NON-NLS-1$

	buffer.append("<LINK REL=\"stylesheet\" HREF= \""); //$NON-NLS-1$
	buffer.append(styleSheetURL);
	buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$

	buffer.append("</head>"); //$NON-NLS-1$
	}

	private static void appendColor(StringBuffer buffer, RGB rgb) {
	buffer.append('#');
	buffer.append(Integer.toHexString(rgb.red));
	buffer.append(Integer.toHexString(rgb.green));
	buffer.append(Integer.toHexString(rgb.blue));
	}

	public static void insertPageProlog(StringBuffer buffer, int position) {
	insertPageProlog(buffer, position, getBgColor()); //$NON-NLS-1$
	}

	public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
	insertPageProlog(buffer, position, getBgColor(), styleSheetURL); //$NON-NLS-1$
	}

	static RGB getBgColor() {
	RGB result = getSystemBGColor();
	if (result == null) {
	// use RGB value of default info bg color
	// on WindowsXP
	result = new RGB(255, 255, 225);
	}
	return result;

	}

	public static void addPageProlog(StringBuffer buffer) {
	insertPageProlog(buffer, buffer.length());
	}

	public static void addPageEpilog(StringBuffer buffer) {
	buffer.append("</font></body></html>"); //$NON-NLS-1$
	}

	public static void startBulletList(StringBuffer buffer) {
	buffer.append("<ul>"); //$NON-NLS-1$
	}

	public static void endBulletList(StringBuffer buffer) {
	buffer.append("</ul>"); //$NON-NLS-1$
	}

	public static void addBullet(StringBuffer buffer, String bullet) {
	if (bullet != null) {
	buffer.append("<li>"); //$NON-NLS-1$
	buffer.append(bullet);
	buffer.append("</li>"); //$NON-NLS-1$
	}
	}

	public static void addSmallHeader(StringBuffer buffer, String header) {
	if (header != null) {
	buffer.append("<h5>"); //$NON-NLS-1$
	buffer.append(header);
	buffer.append("</h5>"); //$NON-NLS-1$
	}
	}

	public static void addParagraph(StringBuffer buffer, String paragraph) {
	if (paragraph != null) {
	buffer.append("<p>"); //$NON-NLS-1$
	buffer.append(paragraph);
	}
	}

	public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
	if (paragraphReader != null)
	addParagraph(buffer, read(paragraphReader));
	}
	}