Fixed bug: 157461: [implementation] Put all html rendering related classes into one package and declare others as x-friends

author: Dani Megert 2006-09-22 15:17:39 +0000
committer: Dani Megert 2006-09-22 15:17:39 +0000
commit: b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb (patch)
tree: 86645f6b1bf72a921e686db1a84b5a7ea9cf69bb /org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.java
parent: 1932e846bc3e2eaa301b5ec4094d14c42103a281 (diff)
download: eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.tar.gz
eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.tar.xz
eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.zip
1 files changed, 301 insertions, 0 deletions
diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.java b/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.java
new file mode 100644
index 00000000000..e6e891b66a9
--- /dev/null
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.java
@@ -0,0 +1,301 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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.jface.internal.text.html;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.net.URL;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.SWTError;
+import org.eclipse.swt.graphics.FontData;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.widgets.Display;
+
+
+/**
+ * Provides a set of convenience methods for creating HTML pages.
+ * <p>
+ * Moved into this package from <code>org.eclipse.jface.internal.text.revisions</code>.</p>
+ */
+public class HTMLPrinter {
+
+	private static RGB BG_COLOR_RGB= null;
+
+	static {
+		final Display display= Display.getDefault();
+		if (display != null && !display.isDisposed()) {
+			try {
+				display.asyncExec(new Runnable() {
+					/*
+					 * @see java.lang.Runnable#run()
+					 */
+					public void run() {
+						BG_COLOR_RGB= display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
+					}
+				});
+			} catch (SWTError err) {
+				// see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
+				if (err.code != SWT.ERROR_DEVICE_DISPOSED)
+					throw err;
+			}
+		}
+	}
+
+	private HTMLPrinter() {
+	}
+
+	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, '&', "&amp;"); //$NON-NLS-1$
+		content= replace(content, '"', "&quot;"); //$NON-NLS-1$
+		content= replace(content, '<', "&lt;"); //$NON-NLS-1$
+		return replace(content, '>', "&gt;"); //$NON-NLS-1$
+	}
+
+	public 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) {
+		}
+
+		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>"); //$NON-NLS-1$
+
+			appendStyleSheetURL(pageProlog, styleSheetURL);
+
+			pageProlog.append("<body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
+			appendColor(pageProlog, bgRGB);
+			pageProlog.append("\">"); //$NON-NLS-1$
+
+			buffer.insert(position,  pageProlog.toString());
+		}
+	}
+	public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, String styleSheet) {
+		
+		if (bgRGB == null)
+			insertPageProlog(buffer, position, styleSheet);
+		else {
+			StringBuffer pageProlog= new StringBuffer(300);
+			
+			pageProlog.append("<html>"); //$NON-NLS-1$
+			
+			appendStyleSheetURL(pageProlog, styleSheet);
+			
+			pageProlog.append("<body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
+			appendColor(pageProlog, bgRGB);
+			pageProlog.append("\">"); //$NON-NLS-1$
+			
+			buffer.insert(position,  pageProlog.toString());
+		}
+	}
+
+	public static void insertStyles(StringBuffer buffer, String[] styles) {
+		if (styles == null || styles.length == 0)
+			return;
+
+		StringBuffer styleBuf= new StringBuffer(10 * styles.length);
+		for (int i= 0; styles != null && i < styles.length; i++) {
+			styleBuf.append(" style=\""); //$NON-NLS-1$
+			styleBuf.append(styles[i]);
+			styleBuf.append('"');
+		}
+
+		// Find insertion index
+		// a) within existing body tag with trailing space 
+		int index= buffer.indexOf("<body "); //$NON-NLS-1$
+		if (index != -1) {
+			buffer.insert(index+5, styleBuf);
+			return;
+		}
+
+		// b) within existing body tag without attributes
+		index= buffer.indexOf("<body>"); //$NON-NLS-1$
+		if (index != -1) {
+			buffer.insert(index+5, ' ');
+			buffer.insert(index+6, styleBuf);
+			return;
+		}
+	}
+
+	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("\">"); //$NON-NLS-1$
+			buffer.insert(position,  pageProlog.toString());
+		}
+	}
+
+	private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
+		if (styleSheet == null)
+			return;
+		
+		buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
+		buffer.append(styleSheet);
+		buffer.append("</style></head>"); //$NON-NLS-1$
+	}
+	
+	private static void appendStyleSheetURL(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()); 
+	}
+
+	public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
+		insertPageProlog(buffer, position, getBgColor(), styleSheetURL); 
+	}
+	
+	public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
+		insertPageProlog(buffer, position, getBgColor(), styleSheet); 
+	}
+
+	private static RGB getBgColor() {
+		if (BG_COLOR_RGB != null)
+			return BG_COLOR_RGB;
+		return new RGB(255,255, 225); // RGB value of info bg color on WindowsXP
+
+	}
+
+	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));
+	}
+	
+	/**
+	 * Replaces the following style attributes of the font definition of the <code>html</code>
+	 * element:
+	 * <ul>
+	 * <li>font-size</li>
+	 * <li>font-weight</li>
+	 * <li>font-style</li>
+	 * <li>font-family</li>
+	 * </ul>
+	 * The font's name is used as font family, a <code>sans-serif</code> default font family is
+	 * appened for the case that the given font name is not available.
+	 * <p>
+	 * If the listed font attributes are not contained in the passed style list, nothing happens.
+	 * </p>
+	 * 
+	 * @param styles CSS style definitions
+	 * @param fontData the font information to use
+	 * @return the modified style definitions
+	 * @since 3.3
+	 */
+	public static String convertTopLevelFont(String styles, FontData fontData) {
+		boolean bold= (fontData.getStyle() & SWT.BOLD) != 0;
+		boolean italic= (fontData.getStyle() & SWT.ITALIC) != 0;
+		int height= fontData.getHeight();
+		String family= "'" + fontData.getName() + "',sans-serif"; //$NON-NLS-1$ //$NON-NLS-2$
+		styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-size:\\s*)\\d+(pt\\;?.*\\})", "$1" + height + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+		styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-weight:\\s*)\\w+(\\;?.*\\})", "$1" + (bold ? "bold" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
+		styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-style:\\s*)\\w+(\\;?.*\\})", "$1" + (italic ? "italic" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
+		styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-family:\\s*).+?(;.*\\})", "$1" + family + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+		return styles;
+	}
+}
author	Dani Megert	2006-09-22 15:17:39 +0000
committer	Dani Megert	2006-09-22 15:17:39 +0000
commit	b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb (patch)
tree	86645f6b1bf72a921e686db1a84b5a7ea9cf69bb /org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.java
parent	1932e846bc3e2eaa301b5ec4094d14c42103a281 (diff)
download	eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.tar.gz eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.tar.xz eclipse.platform.text-b3b4d7bbb5e53949ead3ed5da6bdf902a9d4ebbb.zip