| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.text; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| |
| /** |
| * Collection of text functions. |
| */ |
| public class TextUtilities { |
| |
| /** |
| * Default line delimiters used by these text functons. |
| */ |
| public final static String[] DELIMITERS= new String[] { "\n", "\r", "\r\n" }; //$NON-NLS-3$ //$NON-NLS-2$ //$NON-NLS-1$ |
| |
| /** |
| * Default line delimiters used by these text functions. |
| * |
| * @deprecated use DELIMITERS instead |
| */ |
| public final static String[] fgDelimiters= DELIMITERS; |
| |
| |
| |
| /** |
| * Determines which one of default line delimiters appears first in the list. If none of them the |
| * hint is returned. |
| * |
| * @param text the text to be checked |
| * @param hint the line delimiter hint |
| */ |
| public static String determineLineDelimiter(String text, String hint) { |
| try { |
| int[] info= indexOf(DELIMITERS, text, 0); |
| return DELIMITERS[info[1]]; |
| } catch (ArrayIndexOutOfBoundsException x) { |
| } |
| return hint; |
| } |
| |
| /** |
| * Returns the starting position and the index of the longest matching search string |
| * in the given text that is greater than the given offset. Returns <code>[-1, -1]</code> |
| * if no match can be found. |
| * |
| * @param searchStrings the strings to search for |
| * @param text the text to be searched |
| * @param offset the offset at which to start the search |
| * @return an <code>int[]</code> with two elements" the first is the starting offset, the second the index of the found |
| * search string in the given <code>searchStrings</code> array, returns <code>[-1, -1]</code> if no match exists |
| */ |
| public static int[] indexOf(String[] searchStrings, String text, int offset) { |
| |
| int[] result= { -1, -1 }; |
| int zeroIndex= -1; |
| |
| for (int i= 0; i < searchStrings.length; i++) { |
| |
| int length= searchStrings[i].length(); |
| |
| if (length == 0) { |
| zeroIndex= i; |
| continue; |
| } |
| |
| int index= text.indexOf(searchStrings[i], offset); |
| if (index >= 0) { |
| |
| if (result[0] == -1) { |
| result[0]= index; |
| result[1]= i; |
| } else if (index < result[0]) { |
| result[0]= index; |
| result[1]= i; |
| } else if (index == result[0] && length > searchStrings[result[1]].length()) { |
| result[0]= index; |
| result[1]= i; |
| } |
| } |
| } |
| |
| if (zeroIndex > -1 && result[0] == -1) { |
| result[0]= 0; |
| result[1]= zeroIndex; |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Returns the index of the longest search string with which the given text ends or |
| * <code>-1</code> if none matches. |
| * |
| * @param searchStrings the strings to search for |
| * @param text the text to search |
| * @return the index in <code>searchStrings</code> of the longest string with which <code>text</code> ends or <code>-1</code> |
| */ |
| public static int endsWith(String[] searchStrings, String text) { |
| |
| int index= -1; |
| |
| for (int i= 0; i < searchStrings.length; i++) { |
| if (text.endsWith(searchStrings[i])) { |
| if (index == -1 || searchStrings[i].length() > searchStrings[index].length()) |
| index= i; |
| } |
| } |
| |
| return index; |
| } |
| |
| /** |
| * Returns the index of the longest search string with which the given text starts or <code>-1</code> |
| * if none matches. |
| * |
| * @param searchStrings the strings to search for |
| * @param text the text to search |
| * @return the index in <code>searchStrings</code> of the longest string with which <code>text</code> starts or <code>-1</code> |
| */ |
| public static int startsWith(String[] searchStrings, String text) { |
| |
| int index= -1; |
| |
| for (int i= 0; i < searchStrings.length; i++) { |
| if (text.startsWith(searchStrings[i])) { |
| if (index == -1 || searchStrings[i].length() > searchStrings[index].length()) |
| index= i; |
| } |
| } |
| |
| return index; |
| } |
| |
| /** |
| * Returns the index of the first compare string that equals the given text or <code>-1</code> |
| * if none is equal. |
| * |
| * @param compareStrings the strings to compare with |
| * @param text the text to check |
| * @return the index of the first equal compare string or <code>-1</code> |
| */ |
| public static int equals(String[] compareStrings, String text) { |
| for (int i= 0; i < compareStrings.length; i++) { |
| if (text.equals(compareStrings[i])) |
| return i; |
| } |
| return -1; |
| } |
| |
| /** |
| * Returns a document event which is an accumulation of a list of document events, |
| * <code>null</code> if the list of documentEvents is empty. |
| * The document of the document events are ignored. |
| * |
| * @param unprocessedDocument the document to which the document events would be applied |
| * @param documentEvents the list of document events to merge |
| * @return returns the merged document event |
| * @throws BadLocationException might be thrown if document is not in the correct state with respect to document events |
| */ |
| public static DocumentEvent mergeUnprocessedDocumentEvents(IDocument unprocessedDocument, List documentEvents) throws BadLocationException { |
| |
| if (documentEvents.size() == 0) |
| return null; |
| |
| final Iterator iterator= documentEvents.iterator(); |
| final DocumentEvent firstEvent= (DocumentEvent) iterator.next(); |
| |
| // current merged event |
| final IDocument document= unprocessedDocument; |
| int offset= firstEvent.getOffset(); |
| int length= firstEvent.getLength(); |
| final StringBuffer text= new StringBuffer(firstEvent.getText() == null ? "" : firstEvent.getText()); //$NON-NLS-1$ |
| |
| while (iterator.hasNext()) { |
| |
| final int delta= text.length() - length; |
| |
| final DocumentEvent event= (DocumentEvent) iterator.next(); |
| final int eventOffset= event.getOffset(); |
| final int eventLength= event.getLength(); |
| final String eventText= event.getText() == null ? "" : event.getText(); //$NON-NLS-1$ |
| |
| // event is right from merged event |
| if (eventOffset > offset + length + delta) { |
| final String string= document.get(offset + length, (eventOffset - delta) - (offset + length)); |
| text.append(string); |
| text.append(eventText); |
| |
| length= (eventOffset - delta) + eventLength - offset; |
| |
| // event is left from merged event |
| } else if (eventOffset + eventLength < offset) { |
| final String string= document.get(eventOffset + eventLength, offset - (eventOffset + eventLength)); |
| text.insert(0, string); |
| text.insert(0, eventText); |
| |
| length= offset + length - eventOffset; |
| offset= eventOffset; |
| |
| // events overlap eachother |
| } else { |
| final int start= Math.max(0, eventOffset - offset); |
| final int end= Math.min(text.length(), eventLength + eventOffset - offset); |
| text.replace(start, end, eventText); |
| |
| offset= Math.min(offset, eventOffset); |
| final int totalDelta= delta + eventText.length() - eventLength; |
| length= text.length() - totalDelta; |
| } |
| } |
| |
| return new DocumentEvent(document, offset, length, text.toString()); |
| } |
| |
| /** |
| * Returns a document event which is an accumulation of a list of document events, |
| * <code>null</code> if the list of document events is empty. |
| * The document events being merged must all refer to the same document, to which |
| * the document changes have been already applied. |
| * |
| * @param documentEvents the list of document events to merge |
| * @return returns the merged document event |
| * @throws BadLocationException might be thrown if document is not in the correct state with respect to document events |
| */ |
| public static DocumentEvent mergeProcessedDocumentEvents(List documentEvents) throws BadLocationException { |
| |
| if (documentEvents.size() == 0) |
| return null; |
| |
| final ListIterator iterator= documentEvents.listIterator(documentEvents.size()); |
| final DocumentEvent firstEvent= (DocumentEvent) iterator.previous(); |
| |
| // current merged event |
| final IDocument document= firstEvent.getDocument(); |
| int offset= firstEvent.getOffset(); |
| int length= firstEvent.getLength(); |
| int textLength= firstEvent.getText() == null ? 0 : firstEvent.getText().length(); |
| |
| while (iterator.hasPrevious()) { |
| |
| final int delta= length - textLength; |
| |
| final DocumentEvent event= (DocumentEvent) iterator.previous(); |
| final int eventOffset= event.getOffset(); |
| final int eventLength= event.getLength(); |
| final int eventTextLength= event.getText() == null ? 0 : event.getText().length(); |
| |
| // event is right from merged event |
| if (eventOffset > offset + textLength + delta) { |
| length= (eventOffset - delta) - (offset + textLength) + length + eventLength; |
| textLength= (eventOffset - delta) + eventTextLength - offset; |
| |
| // event is left from merged event |
| } else if (eventOffset + eventTextLength < offset) { |
| length= offset - (eventOffset + eventTextLength) + length + eventLength; |
| textLength= offset + textLength - eventOffset; |
| offset= eventOffset; |
| |
| // events overlap eachother |
| } else { |
| final int start= Math.max(0, eventOffset - offset); |
| final int end= Math.min(length, eventTextLength + eventOffset - offset); |
| length += eventLength - (end - start); |
| |
| offset= Math.min(offset, eventOffset); |
| final int totalDelta= delta + eventLength - eventTextLength; |
| textLength= length - totalDelta; |
| } |
| } |
| |
| final String text= document.get(offset, textLength); |
| return new DocumentEvent(document, offset, length, text); |
| } |
| |
| /** |
| * Removes all connected document partitioners from the given document and stores them |
| * under their partitioning name in a map. This map is returned. After this method has been called |
| * the given document is no longer connected to any document partitioner. |
| * |
| * @param document the document |
| * @return the map containing the removed partitioners |
| */ |
| public static Map removeDocumentPartitioners(IDocument document) { |
| Map partitioners= new HashMap(); |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| String[] partitionings= extension3.getPartitionings(); |
| for (int i= 0; i < partitionings.length; i++) { |
| IDocumentPartitioner partitioner= extension3.getDocumentPartitioner(partitionings[i]); |
| if (partitioner != null) { |
| extension3.setDocumentPartitioner(partitionings[i], null); |
| partitioner.disconnect(); |
| partitioners.put(partitionings[i], partitioner); |
| } |
| } |
| } else { |
| IDocumentPartitioner partitioner= document.getDocumentPartitioner(); |
| if (partitioner != null) { |
| document.setDocumentPartitioner(null); |
| partitioner.disconnect(); |
| partitioners.put(IDocumentExtension3.DEFAULT_PARTITIONING, partitioner); |
| } |
| } |
| return partitioners; |
| } |
| |
| /** |
| * Connects the given document with all document partitioners stored in the given map under |
| * their partitioning name. This method cleans the given map. |
| * |
| * @param document the document |
| * @param partitioners the map containing the partitioners to be connected |
| * @since 3.0 |
| */ |
| public static void addDocumentPartitioners(IDocument document, Map partitioners) { |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| Iterator e= partitioners.keySet().iterator(); |
| while (e.hasNext()) { |
| String partitioning= (String) e.next(); |
| IDocumentPartitioner partitioner= (IDocumentPartitioner) partitioners.get(partitioning); |
| partitioner.connect(document); |
| extension3.setDocumentPartitioner(partitioning, partitioner); |
| } |
| partitioners.clear(); |
| } else { |
| IDocumentPartitioner partitioner= (IDocumentPartitioner) partitioners.get(IDocumentExtension3.DEFAULT_PARTITIONING); |
| partitioner.connect(document); |
| document.setDocumentPartitioner(partitioner); |
| } |
| } |
| |
| /** |
| * Returns the content type at the given offset of the given document. |
| * |
| * @param document the document |
| * @param partitioning the partitioning to be used |
| * @param offset the offset |
| * @return the content type at the given offset of the document |
| * @throws BadLocationException if offset is invalid in the document |
| * @since 3.0 |
| */ |
| public static String getContentType(IDocument document, String partitioning, int offset) throws BadLocationException { |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| try { |
| return extension3.getContentType(partitioning, offset); |
| } catch (BadPartitioningException x) { |
| return IDocument.DEFAULT_CONTENT_TYPE; |
| } |
| } else { |
| return document.getContentType(offset); |
| } |
| } |
| |
| /** |
| * Returns the partition of the given offset of the given document. |
| * |
| * @param document the document |
| * @param partitioning the partitioning to be used |
| * @param offset the offset |
| * @return the content type at the given offset of this viewer's input document |
| * @throws BadLocationException if offset is invalid in the given document |
| * @since 3.0 |
| */ |
| public static ITypedRegion getPartition(IDocument document, String partitioning, int offset) throws BadLocationException { |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| try { |
| return extension3.getPartition(partitioning, offset); |
| } catch (BadPartitioningException x) { |
| return new TypedRegion(0, document.getLength(), IDocument.DEFAULT_CONTENT_TYPE); |
| } |
| } else { |
| return document.getPartition(offset); |
| } |
| } |
| |
| /** |
| * Computes and returns the partitioning for the given region of the given document for the given partitioning name. |
| * |
| * @param document the document |
| * @param partitioning the partitioning name |
| * @param offset the region offset |
| * @param length the region length |
| * @return the partitioning for the given region of the given document for the given partitioning name |
| * @throws BadLocationException if the given region is invalid for the given document |
| * @since 3.0 |
| */ |
| public static ITypedRegion[] computePartitioning(IDocument document, String partitioning, int offset, int length) throws BadLocationException { |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| try { |
| return extension3.computePartitioning(partitioning, offset, length); |
| } catch (BadPartitioningException x) { |
| return new ITypedRegion[0]; |
| } |
| } else { |
| return document.computePartitioning(offset, length); |
| } |
| } |
| |
| /** |
| * Computes and returns the partition managing position categories for the |
| * given document or <code>null</code> if this was impossible. |
| * |
| * @param document the document |
| * @return the partition managing position categories |
| * @since 3.0 |
| */ |
| public static String[] computePartitionManagingCategories(IDocument document) { |
| if (document instanceof IDocumentExtension3) { |
| IDocumentExtension3 extension3= (IDocumentExtension3) document; |
| String[] partitionings= extension3.getPartitionings(); |
| if (partitionings != null) { |
| Set categories= new HashSet(); |
| for (int i= 0; i < partitionings.length; i++) { |
| IDocumentPartitioner p= extension3.getDocumentPartitioner(partitionings[i]); |
| if (p instanceof IDocumentPartitionerExtension2) { |
| IDocumentPartitionerExtension2 extension2= (IDocumentPartitionerExtension2) p; |
| String[] c= extension2.getManagingPositionCategories(); |
| if (c != null) { |
| for (int j= 0; j < c.length; j++) |
| categories.add(c[j]); |
| } |
| } |
| } |
| String[] result= new String[categories.size()]; |
| categories.toArray(result); |
| return result; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns the default line delimiter for the given document. This is either the delimiter of the first line, or the platform line delimiter if it is |
| * a legal line delimiter or the first one of the legal line delimiters. The default line delimiter should be used when performing document |
| * manipulations that span multiple lines. |
| * |
| * @param document the document |
| * @return the document's default line delimiter |
| * @since 3.0 |
| */ |
| public static String getDefaultLineDelimiter(IDocument document) { |
| |
| String lineDelimiter= null; |
| |
| try { |
| lineDelimiter= document.getLineDelimiter(0); |
| } catch (BadLocationException x) { |
| } |
| |
| if (lineDelimiter == null) { |
| String sysLineDelimiter= System.getProperty("line.separator"); //$NON-NLS-1$ |
| String[] delimiters= document.getLegalLineDelimiters(); |
| Assert.isTrue(delimiters.length > 0); |
| for (int i= 0; i < delimiters.length; i++) { |
| if (delimiters[i].equals(sysLineDelimiter)) { |
| lineDelimiter= sysLineDelimiter; |
| break; |
| } |
| } |
| |
| if (lineDelimiter == null) |
| lineDelimiter= delimiters[0]; |
| } |
| |
| return lineDelimiter; |
| } |
| } |