Java tutorial
/* ****************************************************************************** * Copyright (c) 2006-2012 XMind Ltd. and others. * * This file is a part of XMind 3. XMind releases 3 and * above are dual-licensed under the Eclipse Public License (EPL), * which is available at http://www.eclipse.org/legal/epl-v10.html * and the GNU Lesser General Public License (LGPL), * which is available at http://www.gnu.org/licenses/lgpl.html * See http://www.xmind.net/license.html for details. * * Contributors: * XMind Ltd. - initial API and implementation *******************************************************************************/ package org.xmind.ui.internal.notes; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.Stack; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StyleRange; import org.eclipse.swt.graphics.GlyphMetrics; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.xmind.core.IHtmlNotesContent; import org.xmind.core.IHyperlinkSpan; import org.xmind.core.IImageSpan; import org.xmind.core.INotesContent; import org.xmind.core.IParagraph; import org.xmind.core.IPlainNotesContent; import org.xmind.core.ISpan; import org.xmind.core.ITextSpan; import org.xmind.core.internal.dom.NumberUtils; import org.xmind.core.style.IStyle; import org.xmind.core.style.IStyled; import org.xmind.ui.resources.ColorUtils; import org.xmind.ui.resources.FontUtils; import org.xmind.ui.richtext.Hyperlink; import org.xmind.ui.richtext.IRichDocument; import org.xmind.ui.richtext.ImagePlaceHolder; import org.xmind.ui.richtext.LineStyle; import org.xmind.ui.richtext.RichDocument; import org.xmind.ui.richtext.RichTextUtils; import org.xmind.ui.style.StyleUtils; import org.xmind.ui.style.Styles; public class RichDocumentBuilder { private static boolean DEBUG = false; private RichDocumentNotesAdapter adapter; private IRichDocument result; private StringBuilder totalText = new StringBuilder(); private List<StyleRange> textStyles = new ArrayList<StyleRange>(); private List<LineStyle> lineStyles = new ArrayList<LineStyle>(); private List<ImagePlaceHolder> images = new ArrayList<ImagePlaceHolder>(); private List<Hyperlink> hyperlinks = new ArrayList<Hyperlink>(); private int lineIndex = 0; private int totalOffset = 0; private Stack<LineStyle> lineStyleStack = new Stack<LineStyle>(); private Stack<StyleRange> textStyleStack = new Stack<StyleRange>(); private StringBuilder currentLine = null; private StyleRange lastTextStyle = null; public RichDocumentBuilder(RichDocumentNotesAdapter adapter) { this.adapter = adapter; } public void build(INotesContent content) { if (content == null) { if (DEBUG) System.out.println("empty content"); //$NON-NLS-1$ result = new RichDocument(); return; } if (content instanceof IPlainNotesContent) { String text = ((IPlainNotesContent) content).getTextContent(); if (text == null || "".equals(text)) { //$NON-NLS-1$ if (DEBUG) System.out.println("empty plain content"); //$NON-NLS-1$ result = new RichDocument(); return; } if (DEBUG) System.out.println("plain content"); //$NON-NLS-1$ result = new RichDocument(text); return; } if (!(content instanceof IHtmlNotesContent)) { if (DEBUG) System.out.println("unknown content format"); //$NON-NLS-1$ result = new RichDocument(); return; } IHtmlNotesContent html = (IHtmlNotesContent) content; // if (DEBUG) // System.out.println(content); // content = DOMUtils.makeElementText(content, NS.XMAP, // WorkbookUtils.TAG_RICH_CONTENT, NS.Xhtml, NS.Xlink, NS.SVG); // Document doc; // try { // doc = DOMUtils.loadDocument(content.getBytes()); // } catch (Throwable e) { // if (DEBUG) { // e.printStackTrace(); // } else { // Logger.log(e, "Failed to parse html notes"); //$NON-NLS-1$ // } // result = new RichDocument(); // return; // } readContent(html); // // readElement(doc.getDocumentElement()); if (endsWith(totalText, NotesConstants.LINE_DELIMITER)) { if (DEBUG) { System.out.println("-- delete last line delimiter -- "); //$NON-NLS-1$ } deleteLastLineDelimiter(); } result = new RichDocument(totalText.toString()); result.setTextStyles(textStyles.toArray(new StyleRange[textStyles.size()])); result.setLineStyles(lineStyles.toArray(new LineStyle[lineStyles.size()])); result.setImages(images.toArray(new ImagePlaceHolder[images.size()])); result.setHyperlinks(hyperlinks.toArray(new Hyperlink[hyperlinks.size()])); if (DEBUG) { System.out.println(result.get()); System.out.println(Arrays.toString(result.getTextStyles())); System.out.println(Arrays.toString(result.getLineStyles())); System.out.println(Arrays.toString(result.getImages())); System.out.println(Arrays.toString(result.getHyperlinks())); } } private boolean endsWith(StringBuilder sb, String s) { if (s.length() == 0 || sb.length() < s.length()) return false; for (int i = 0; i < s.length(); i++) { char c = sb.charAt(sb.length() - i - 1); char c2 = s.charAt(s.length() - i - 1); if (c != c2) return false; } return true; } private void deleteLastLineDelimiter() { int length = NotesConstants.LENGTH_DELIMITER; totalText.delete(totalText.length() - length, totalText.length()); if (lastTextStyle != null && lastTextStyle.start + lastTextStyle.length == totalOffset) { if (lastTextStyle.length <= length) { textStyles.remove(lastTextStyle); } else { lastTextStyle.length -= length; } } } private void readContent(IHtmlNotesContent html) { for (IParagraph p : html.getParagraphs()) { readParagraph(p); } } private void readParagraph(IParagraph p) { if (currentLine != null) { endLine(); } if (DEBUG) { System.out.println("start line: " + lineIndex); //$NON-NLS-1$ } LineStyle currentLineStyle = createLineStyle(p); if (currentLineStyle != null) { currentLineStyle.lineIndex = lineIndex; lineStyles.add(currentLineStyle); if (DEBUG) System.out.println("line style added: " + currentLineStyle); //$NON-NLS-1$ } lineStyleStack.push(currentLineStyle); if (DEBUG) System.out.println("line style pushed: " + currentLineStyle); //$NON-NLS-1$ currentLine = new StringBuilder(); readParagraphContent(p); endLine(); lineStyleStack.pop(); } private LineStyle createLineStyle(IParagraph p) { LineStyle currentLineStyle = newLineStyle(); IStyle style = getStyle(p); if (style != null) { String alignment = style.getProperty(Styles.TextAlign); if (DEBUG) { System.out.println("alingment: " + alignment); //$NON-NLS-1$ } if (alignment != null) { currentLineStyle.alignment = toSWTAlignment(alignment); } // String bullet = style.getProperty(Styles.TextBullet); // if (DEBUG) // System.out.println("bullet: " + bullet); //$NON-NLS-1$ // if (bullet != null) { // boolean isBullet = Styles.TEXT_STYLE_BULLET.equals(bullet) ? true // : false; // currentLineStyle.bullet = isBullet; // } String bulletStyle = style.getProperty(Styles.TextBullet); if (DEBUG) System.out.println("bulletStyle: " + bulletStyle); //$NON-NLS-1$ if (bulletStyle != null) { currentLineStyle.bulletStyle = getBulletStyle(bulletStyle); } } else if (DEBUG) { System.out.println("no line style"); //$NON-NLS-1$ } return currentLineStyle; } private String getBulletStyle(String bulletStyle) { if (LineStyle.BULLET.equals(bulletStyle)) return LineStyle.BULLET; else if (LineStyle.NUMBER.equals(bulletStyle)) return LineStyle.NUMBER; return LineStyle.NONE_STYLE; } private void readParagraphContent(IParagraph p) { for (ISpan span : p.getSpans()) { if (span instanceof IImageSpan) { readImage((IImageSpan) span); } else if (span instanceof ITextSpan) { readText((ITextSpan) span); } else if (span instanceof IHyperlinkSpan) { readHyperlink((IHyperlinkSpan) span); } } } // private void readElementChildren(Element ele) { // NodeList children = ele.getChildNodes(); // for (int i = 0; i < children.getLength(); i++) { // Node child = children.item(i); // short nodeType = child.getNodeType(); // if (nodeType == Node.ELEMENT_NODE) { // readElement((Element) child); // } else if (nodeType == Node.TEXT_NODE) { // readText((Text) child); // } // } // } private void endLine() { if (DEBUG) { System.out.println("end line: " + lineIndex); //$NON-NLS-1$ } sumLineIndent(); appendLineDelimiter(); lineIndex++; currentLine = null; } private void ensureLineStart() { if (currentLine != null) return; LineStyle currentLineStyle = newLineStyle(); currentLineStyle.lineIndex = lineIndex; if (!lineStyleStack.isEmpty()) lineStyleStack.pop(); lineStyleStack.push(currentLineStyle); currentLine = new StringBuilder(); } private void appendLineDelimiter() { totalText.append(NotesConstants.LINE_DELIMITER); if (lastTextStyle != null && lastTextStyle.start + lastTextStyle.length == totalOffset) { lastTextStyle.length += NotesConstants.LENGTH_DELIMITER; } totalOffset += NotesConstants.LENGTH_DELIMITER; } private void sumLineIndent() { if (currentLine == null) return; if (lineStyleStack.isEmpty()) return; int indent = calcIndentCount(currentLine); LineStyle lastLineStyle = lineStyleStack.peek(); lastLineStyle.indent = indent; } private LineStyle newLineStyle() { LineStyle lastLineStyle = lineStyleStack.isEmpty() ? null : lineStyleStack.peek(); if (DEBUG) { System.out.println("last line style: " + lastLineStyle); //$NON-NLS-1$ } if (lastLineStyle == null) return (LineStyle) RichTextUtils.DEFAULT_LINE_STYLE.clone(); return (LineStyle) lastLineStyle.clone(); } private StyleRange newTextStyle() { StyleRange lastTextStyle = textStyleStack.isEmpty() ? null : textStyleStack.peek(); if (lastTextStyle == null) return null; return (StyleRange) lastTextStyle.clone(); } private void readImage(IImageSpan span) { String uri = span.getSource();//DOMUtils.getAttribute(ele, DOMConstants.ATTR_SRC); if (uri != null) { Image image = adapter.getImageFromUrl(uri); if (image != null) { ensureLineStart(); String s = ImagePlaceHolder.PLACE_HOLDER; int length = s.length(); totalText.append(s); currentLine.append(s); StyleRange style = (StyleRange) RichTextUtils.DEFAULT_STYLE.clone(); style.start = totalOffset; style.length = length; // style.data = image; Rectangle rect = image.getBounds(); style.metrics = new GlyphMetrics(rect.height, 0, rect.width); ImagePlaceHolder imagePlaceHolder = new ImagePlaceHolder(totalOffset, image); images.add(imagePlaceHolder); if (!RichTextUtils.merge(style, lastTextStyle)) { textStyles.add(style); lastTextStyle = style; } totalOffset += length; } } } private void readHyperlink(IHyperlinkSpan span) { String urlString = span.getHref(); int start = totalOffset; for (ISpan s : span.getSpans()) { if (s instanceof ITextSpan) { readText((ITextSpan) s); } else if (s instanceof IImageSpan) { readImage((IImageSpan) s); } } int length = totalOffset - start; Hyperlink hyperlink = new Hyperlink(start, length, urlString); hyperlinks.add(hyperlink); } private void readText(ITextSpan span) { StyleRange textStyle = createTextStyle(getStyle(span)); textStyleStack.push(textStyle); appendText(span.getTextContent(), textStyle); //readElementChildren(ele); textStyleStack.pop(); } private void appendText(String text, StyleRange textStyle) { ensureLineStart(); int length = text.length(); totalText.append(text); currentLine.append(text); if (textStyle != null) { textStyle.start = totalOffset; textStyle.length = length; // Merge with last style range if possible if (!RichTextUtils.merge(textStyle, lastTextStyle)) { textStyles.add(textStyle); lastTextStyle = textStyle; } } totalOffset += length; } // private void readText(Text text) { // appendText(text.getTextContent(), newTextStyle()); // } private StyleRange createTextStyle(IStyle style) { StyleRange textStyle = newTextStyle(); if (style == null) return textStyle; String name = style.getProperty(Styles.FontFamily); String availableFontName = FontUtils.getAAvailableFontNameFor(name); name = availableFontName != null ? availableFontName : name; if (Styles.SYSTEM.equals(name)) { name = JFaceResources.getDefaultFont().getFontData()[0].getName(); } String height = style.getProperty(Styles.FontSize); String weight = style.getProperty(Styles.FontWeight); String fontStyle = style.getProperty(Styles.FontStyle); String foreground = style.getProperty(Styles.TextColor); String background = style.getProperty(Styles.BackgroundColor); String decoration = style.getProperty(Styles.TextDecoration); if (name == null && height == null && weight == null && fontStyle == null && foreground == null && background == null && decoration == null) return textStyle; if (name == null) name = RichTextUtils.DEFAULT_FONT_DATA.getName(); int size = NumberUtils.safeParseInt(StyleUtils.trimNumber(height), RichTextUtils.DEFAULT_FONT_DATA.getHeight()); boolean bold = weight != null && weight.contains(Styles.FONT_WEIGHT_BOLD); boolean italic = fontStyle != null && fontStyle.contains(Styles.FONT_STYLE_ITALIC); if (textStyle == null) textStyle = new StyleRange(); textStyle.font = FontUtils.getFont(name, size, bold, italic); textStyle.foreground = ColorUtils.getColor(foreground); textStyle.background = ColorUtils.getColor(background); textStyle.underline = decoration != null && decoration.contains(Styles.TEXT_DECORATION_UNDERLINE); textStyle.strikeout = decoration != null && decoration.contains(Styles.TEXT_DECORATION_LINE_THROUGH); return textStyle; } private int toSWTAlignment(String value) { if (Styles.ALIGN_CENTER.equals(value)) return SWT.CENTER; if (Styles.ALIGN_RIGHT.equals(value)) return SWT.RIGHT; return SWT.LEFT; } private int calcIndentCount(StringBuilder line) { int indent = 0; for (int i = 0; i < line.length(); i++) { char c = line.charAt(i); if (c != '\t') { return indent; } indent++; } return indent; } private IStyle getStyle(IStyled styled) { String styleId = styled.getStyleId(); if (styleId != null) { return adapter.getWorkbook().getStyleSheet().findStyle(styleId); } return null; } public IRichDocument getResult() { return result; } }