| /******************************************************************************* |
| * 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.jdt.internal.ui.examples.jspeditor; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.text.source.translation.ITagHandler; |
| import org.eclipse.jface.text.source.translation.ITranslatorResultCollector; |
| |
| /** |
| * |
| * @since 3.0 |
| */ |
| public class Jsp2JavaTagHandler implements ITagHandler { |
| |
| private boolean fInUseBean; |
| private boolean fInTagLib; |
| private String fTagLibValue; |
| private String fClass; |
| private String fId; |
| private String fSource; |
| private boolean fInDeclaration; |
| private boolean fInJavaSection; |
| |
| |
| /* |
| * @see org.eclipse.jface.text.source.ITagHandler#canHandleTag(java.lang.String) |
| */ |
| public boolean canHandleTag(String tag) { |
| return true; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.source.ITagHandler#canHandleText(java.lang.String) |
| */ |
| public boolean canHandleText(String text) { |
| return true; |
| } |
| |
| public void reset(String startTag) { |
| fInUseBean= "jsp:useBean".equals(startTag); //$NON-NLS-1$ |
| fInTagLib= "c:out".equals(startTag); //$NON-NLS-1$ |
| fInJavaSection= "<%".equals(startTag); //$NON-NLS-1$ |
| fInDeclaration= "<%!".equals(startTag); //$NON-NLS-1$ |
| } |
| /* |
| * @see org.eclipse.jface.text.source.ITagHandler#addAttribute(java.lang.String, java.lang.String) |
| */ |
| public void addAttribute(String name, String value, int sourceLineNumber) { |
| if (fInUseBean) { |
| if ("id".equals(name)) //$NON-NLS-1$ |
| fId= value; |
| else if ("class".equals(name)) //$NON-NLS-1$ |
| fClass= value; |
| } |
| if (fInTagLib) { |
| fTagLibValue= value; |
| } |
| if ("source".equals(name)) //$NON-NLS-1$ |
| fSource= value; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.source.ITagHandler#backTranslateOffsetInLine(java.lang.String, int) |
| */ |
| public int backTranslateOffsetInLine(String originalLine, String translatedLine, int offsetInTranslatedLine) { |
| int javaPartitionStart= 0; |
| if (originalLine.indexOf("<%") != -1) //$NON-NLS-1$ |
| javaPartitionStart= handleJavaSection(originalLine, offsetInTranslatedLine); |
| else if (originalLine.indexOf("<jsp:useBean id=\"") != -1) { //$NON-NLS-1$ |
| javaPartitionStart= handleUseBeanTag(originalLine, offsetInTranslatedLine); |
| } else if (originalLine.indexOf("<c:out value=\"${") != -1) { //$NON-NLS-1$ |
| javaPartitionStart= handleTagLib(originalLine, offsetInTranslatedLine); |
| } |
| return javaPartitionStart; |
| } |
| |
| private int handleJavaSection(String jspLineStr, int relativeLineOffsetInJava) { |
| return jspLineStr.indexOf("<%") + 3; //$NON-NLS-1$ |
| } |
| |
| private int handleTagLib(String jspLineStr, int relativeLineOffsetInJava) { |
| int javaFileOffset= "System.out.println(".length(); //$NON-NLS-1$ |
| return jspLineStr.indexOf("<c:out value=\"${") + 16 - javaFileOffset; //$NON-NLS-1$ |
| } |
| |
| /* |
| * This is a good example where the relative line offset in the Java |
| * document cannot be directly mapped back to Jsp document. |
| */ |
| private int handleUseBeanTag(String jspLineStr, int relativeLineOffsetInJava) { |
| |
| int javaPartitionStart; |
| |
| int variableNameStart= jspLineStr.indexOf("<jsp:useBean id=\"") + 17; //$NON-NLS-1$ |
| int variableNameLength= Math.max(0, jspLineStr.indexOf('"', variableNameStart) - variableNameStart); |
| |
| int typeStart= jspLineStr.indexOf("class=\"") + 7; //$NON-NLS-1$ |
| int typeLength= Math.max(0, jspLineStr.indexOf('"', typeStart) - typeStart); |
| |
| if (relativeLineOffsetInJava < typeLength) { |
| javaPartitionStart= typeStart; |
| } else if (relativeLineOffsetInJava < typeLength + variableNameLength) |
| javaPartitionStart= variableNameStart; |
| else |
| javaPartitionStart= typeStart; |
| |
| // start relative to Jsp line start |
| return javaPartitionStart - relativeLineOffsetInJava; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.source.ITagHandler#processEndTag(ITranslatorResultCollector, int) |
| */ |
| public void processEndTag(ITranslatorResultCollector resultCollector, int sourceLineNumber) throws IOException { |
| Assert.isTrue(resultCollector instanceof JspTranslatorResultCollector); |
| |
| JspTranslatorResultCollector jspResultCollector= (JspTranslatorResultCollector)resultCollector; |
| |
| if (fInUseBean) { |
| if (fId != null && fClass != null) { |
| jspResultCollector.appendLocalDeclaration(fClass + " " + fId + "= new " + fClass + "();\n", sourceLineNumber); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| fId= fClass= null; |
| } |
| fInUseBean= false; |
| } |
| if (fInTagLib && fTagLibValue != null) { |
| jspResultCollector.appendContent("System.out.println(" + fTagLibValue.substring(2, fTagLibValue.length() - 1) + ");\n", sourceLineNumber); //$NON-NLS-1$ //$NON-NLS-2$ |
| fTagLibValue= null; |
| fInTagLib= false; |
| } |
| if (fInJavaSection) { |
| int i= 0; |
| StringBuffer out= new StringBuffer(); |
| while (i < fSource.length()) { |
| char c= fSource.charAt(i++); |
| if (c == '\n') { |
| jspResultCollector.appendContent(out.toString() + "\n", sourceLineNumber++); //$NON-NLS-1$ |
| out.setLength(0); |
| } else { |
| out.append(c); |
| } |
| } |
| if (out.length() > 0) { |
| jspResultCollector.appendContent(out.toString() + "\n", sourceLineNumber); //$NON-NLS-1$ |
| } |
| } |
| if (fInDeclaration) { |
| int i= 0; |
| StringBuffer out= new StringBuffer(); |
| while (i < fSource.length()) { |
| char c= fSource.charAt(i++); |
| if (c == '\n') { |
| jspResultCollector.appendDeclaration(out.toString() + "\n", sourceLineNumber++); //$NON-NLS-1$ |
| out.setLength(0); |
| } else { |
| out.append(c); |
| } |
| } |
| if (out.length() > 0) { |
| jspResultCollector.appendDeclaration(out.toString() + "\n", sourceLineNumber); //$NON-NLS-1$ |
| } |
| } |
| } |
| } |