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diff dwtx/jface/internal/text/html/HTMLPrinter.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
parents
children c4fb132a086c
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/internal/text/html/HTMLPrinter.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,294 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.internal.text.html.HTMLPrinter;
+
+import dwt.dwthelper.utils;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.net.URL;
+
+import dwt.DWT;
+import dwt.DWTError;
+import dwt.graphics.FontData;
+import dwt.graphics.RGB;
+import dwt.widgets.Display;
+
+
+/**
+ * Provides a set of convenience methods for creating HTML pages.
+ * <p>
+ * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p>
+ */
+public class HTMLPrinter {
+
+    private static RGB BG_COLOR_RGB= new RGB(255, 255, 225); // RGB value of info bg color on WindowsXP
+    private static RGB FG_COLOR_RGB= new RGB(0, 0, 0); // RGB value of info fg color on WindowsXP
+
+
+    static {
+        final Display display= Display.getDefault();
+        if (display !is null && !display.isDisposed()) {
+            try {
+                display.asyncExec(new Runnable() {
+                    /*
+                     * @see java.lang.Runnable#run()
+                     */
+                    public void run() {
+                        BG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_BACKGROUND).getRGB();
+                        FG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_FOREGROUND).getRGB();
+                    }
+                });
+            } catch (DWTError err) {
+                // see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
+                if (err.code !is DWT.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 is -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 fgRGB, RGB bgRGB, String styleSheet) {
+        if (fgRGB is null)
+            fgRGB= FG_COLOR_RGB;
+        if (bgRGB is null)
+            bgRGB= BG_COLOR_RGB;
+
+        StringBuffer pageProlog= new StringBuffer(300);
+
+        pageProlog.append("<html>"); //$NON-NLS-1$
+
+        appendStyleSheetURL(pageProlog, styleSheet);
+
+        appendColors(pageProlog, fgRGB, bgRGB);
+
+        buffer.insert(position,  pageProlog.toString());
+    }
+
+    private static void appendColors(StringBuffer pageProlog, RGB fgRGB, RGB bgRGB) {
+        pageProlog.append("<body text=\""); //$NON-NLS-1$
+        appendColor(pageProlog, fgRGB);
+        pageProlog.append("\" bgcolor=\""); //$NON-NLS-1$
+        appendColor(pageProlog, bgRGB);
+        pageProlog.append("\">"); //$NON-NLS-1$
+    }
+
+    private static void appendColor(StringBuffer buffer, RGB rgb) {
+        buffer.append('#');
+        appendAsHexString(buffer, rgb.red);
+        appendAsHexString(buffer, rgb.green);
+        appendAsHexString(buffer, rgb.blue);
+    }
+
+    private static void appendAsHexString(StringBuffer buffer, int intValue) {
+        String hexValue= Integer.toHexString(intValue);
+        if (hexValue.length() is 1)
+            buffer.append('0');
+        buffer.append(hexValue);
+    }
+
+    public static void insertStyles(StringBuffer buffer, String[] styles) {
+        if (styles is null || styles.length is 0)
+            return;
+
+        StringBuffer styleBuf= new StringBuffer(10 * styles.length);
+        for (int i= 0; styles !is 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 !is -1) {
+            buffer.insert(index+5, styleBuf);
+            return;
+        }
+
+        // b) within existing body tag without attributes
+        index= buffer.indexOf("<body>"); //$NON-NLS-1$
+        if (index !is -1) {
+            buffer.insert(index+5, ' ');
+            buffer.insert(index+6, styleBuf);
+            return;
+        }
+    }
+
+    private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
+        if (styleSheet is 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 is 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>"); //$NON-NLS-1$
+    }
+
+    public static void insertPageProlog(StringBuffer buffer, int position) {
+        StringBuffer pageProlog= new StringBuffer(60);
+        pageProlog.append("<html>"); //$NON-NLS-1$
+        appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
+        buffer.insert(position,  pageProlog.toString());
+    }
+
+    public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
+        StringBuffer pageProlog= new StringBuffer(300);
+        pageProlog.append("<html>"); //$NON-NLS-1$
+        appendStyleSheetURL(pageProlog, styleSheetURL);
+        appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
+        buffer.insert(position,  pageProlog.toString());
+    }
+    
+    public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
+        insertPageProlog(buffer, position, null, null, styleSheet);
+    }
+
+    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 !is 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 !is 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 !is null) {
+            buffer.append("<p>"); //$NON-NLS-1$
+            buffer.append(paragraph);
+        }
+    }
+
+    public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
+        if (paragraphReader !is 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
+     * appended 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) {
+        bool bold= (fontData.getStyle() & DWT.BOLD) !is 0;
+        bool italic= (fontData.getStyle() & DWT.ITALIC) !is 0;
+        
+        // See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=155993
+        String size= Integer.toString(fontData.getHeight()) + ("carbon".equals(DWT.getPlatform()) ? "px" : "pt"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+        
+        String family= "'" + fontData.getName() + "',sans-serif"; //$NON-NLS-1$ //$NON-NLS-2$
+        styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-size:\\s*)\\d+pt(\\;?.*\\})", "$1" + size + "$2"); //$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;
+    }
+}