| /******************************************************************************* |
| * Copyright (c) 2010 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.wst.sse.ui.internal.comment; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITypedRegion; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument; |
| import org.eclipse.wst.sse.ui.internal.Logger; |
| |
| /** |
| * <p>Defines a commenting strategy defined by the <code>org.eclipse.wst.sse.ui.commentinStrategy</code> |
| * extension point and tracked by the {@link CommentingStrategyRegistry}. Though it is important to |
| * note it is not a one to one relationship of {@link CommentingStrategy}s to extensions, there is actually |
| * one {@link CommentingStrategy} for each content type defined for each |
| * <code>org.eclipse.wst.sse.ui.commentinStrategy</code> extension.<p> |
| * |
| * <p>The expected use case is that a {@link CommentingStrategy} is created off the basic configuration |
| * of the extension point and then cloned for each associated content type and then each clone has |
| * its partition information set using {@link #setPartitionInformation}. |
| * Then the {@link CommentingStrategyRegistry} can be used to retrieve applicable {@link CommentingStrategy}s |
| * and apply them to documents.</p> |
| * |
| * <p>It is important to note that any instance of a {@link CommentingStrategy} is only valid for a specific |
| * content type ID but this relationship is tracked by the {@link CommentingStrategyRegistry} and not by |
| * the strategy itself. Thus any reference to the strategy being valid for specific or general partition |
| * types is implying it is already only valid for a specific content type</p> |
| */ |
| public abstract class CommentingStrategy { |
| /** <code>true</code> if this strategy has any required partition types, <code>false</code> otherwise */ |
| private boolean fHasRequiredPartitionTypes; |
| |
| /** |
| * <p>required partition type IDs that must be seen for this strategy to be valid, the number of them |
| * that must be seen for the strategy to be valid is determined by {@link #fRequireAllRequiredPartitionTypes} |
| * this requirement is waved if the optional {@link #fAssociatedCommentPartitionTypeID} is specified and |
| * present because this strategy must be valid if its {@link #fAssociatedCommentPartitionTypeID} is present</p> |
| * |
| * @see #fRequireAllRequiredPartitionTypes |
| * @see #fAssociatedCommentPartitionTypeID |
| */ |
| private List fRequriedPartitionTypeIDs; |
| |
| /** |
| * <p>if <code>true</code> then {@link #fAllowablePartitionTypeIDs} is ignored because |
| * this strategy is valid for any partition type, if <code>false</code> then this |
| * strategy is only valid for those partition types listed in {@link #fAllowablePartitionTypeIDs}</p> |
| * |
| * @see #fAllowablePartitionTypeIDs |
| */ |
| private boolean fAllPartitionTypesAllowable; |
| |
| /** |
| * <p>the partition types that this strategy is valid for, it is also automatically valid for |
| * any partition types listed in {@link #fRequriedPartitionTypeIDs} and the optionally |
| * specified {@link #fAssociatedCommentPartitionTypeID}</p> |
| * |
| * @see #fAllPartitionTypesAllowable |
| * @see #fRequriedPartitionTypeIDs |
| * @see #fAssociatedCommentPartitionTypeID |
| */ |
| private List fAllowablePartitionTypeIDs; |
| |
| /** |
| * an optional associated comment partition type ID, if this partition type is seen then the |
| * the {@link #fRequriedPartitionTypeIDs} requirement is waved as to weather this strategy is |
| * valid or not |
| * |
| * @see #fRequriedPartitionTypeIDs |
| */ |
| private String fAssociatedCommentPartitionTypeID; |
| |
| /** |
| * <p>Default constructor, the specific initialization is done by |
| * {@link #setPartitionInformation}</p> |
| */ |
| public CommentingStrategy() { |
| this.fAssociatedCommentPartitionTypeID = null; |
| this.fRequriedPartitionTypeIDs = Collections.EMPTY_LIST; |
| this.fAllowablePartitionTypeIDs = Collections.EMPTY_LIST; |
| this.fHasRequiredPartitionTypes = false; |
| this.fAllPartitionTypesAllowable = false; |
| } |
| |
| /** |
| * <p>Used to set up the partition information for this strategy</p> |
| * <p>This information is used to determine if a strategy is valid for a set of |
| * {@link ITypedRegion}s.</p> |
| * |
| * @param allowablePartitionTypeIDs the partition types this strategy is valid for, the strategy will also |
| * be considered valid for any of the required partition types |
| * @param allPartitionTypesAllowable if <code>true</code> then this strategy is valid for any partition types |
| * thus ignoring the <code>allowablePartitionTypeIDs</code>, <code>false</code> otherwise |
| * @param requiredPartitionTypeIDs partition type IDs that must be seen for this strategy to be valid, there |
| * are exceptions to this rule, see {@link #isApplicableFor(ITypedRegion[])} |
| * @param requireAllRequiredPartitionTypes <code>true</code> if all of the <code>requiredPartitionTypeIDs must |
| * be seen for this strategy to be valid, <code>false</code> otherwise, there are exceptions to these rules, see |
| * {@link #isApplicableFor(ITypedRegion[])} |
| * @param associatedCommentPartitionTypeID optional comment partition type associated with this strategy, |
| * maybe <code>null</code> |
| * |
| * @see #isApplicableFor(ITypedRegion[]) |
| */ |
| protected final void setPartitionInformation(List allowablePartitionTypeIDs, boolean allPartitionTypesAllowable, |
| List requiredPartitionTypeIDs, String associatedCommentPartitionTypeID) { |
| |
| this.fAllPartitionTypesAllowable = allPartitionTypesAllowable; |
| |
| this.fRequriedPartitionTypeIDs = requiredPartitionTypeIDs; |
| if(this.fRequriedPartitionTypeIDs == null) { |
| this.fRequriedPartitionTypeIDs = Collections.EMPTY_LIST; |
| } |
| |
| this.fHasRequiredPartitionTypes = this.fRequriedPartitionTypeIDs.size() != 0; |
| |
| this.fAllowablePartitionTypeIDs = allowablePartitionTypeIDs; |
| if(this.fAllowablePartitionTypeIDs == null) { |
| this.fAllowablePartitionTypeIDs = Collections.EMPTY_LIST; |
| } |
| |
| this.fAssociatedCommentPartitionTypeID = associatedCommentPartitionTypeID; |
| } |
| |
| /** |
| * <p>Applies this strategy to the given model starting at the given offset for the given length</p> |
| * |
| * @param document {@link IStructuredDocument} to apply this strategy too |
| * @param offset the offset to start this comment at |
| * @param length the length of the region to apply this comment too |
| * |
| * @throws BadLocationException it is not the fault of the strategy if callers passes a bad |
| * <code>offset</code> and/or <code>length</code> for the given <code>model</code> |
| */ |
| public abstract void apply(IStructuredDocument document, int offset, int length) throws BadLocationException; |
| |
| /** |
| * <p>Remove any comments associated with this strategy from the given model for the given offset to |
| * the given length. Weather a comment surrounding the given range should be removed can also be |
| * specified</p> |
| * |
| * @param document {@link IStructuredDocument} to remove comments associated with this strategy from |
| * @param offset the location to start removing comments associated with this strategy from |
| * @param length the length of the region to remove associated comments from |
| * @param removeEnclosing weather a comment should be removed if it incloses the region specified |
| * by the given <code>offset</code> and <code>length</code> |
| * |
| * @throws BadLocationException it is not the fault of the strategy if callers passes a bad |
| * <code>offset</code> and/or <code>length</code> for the given <code>model</code> |
| */ |
| public abstract void remove(IStructuredDocument document, int offset, int length, boolean removeEnclosing) throws BadLocationException; |
| |
| /** |
| * <p>Determines if the given region is a comment region commented by this strategy.</p> |
| * |
| * @param document {@link IStructuredDocument} containing the given <code>region</code> |
| * @param region determine if this region is a comment region commented by this strategy |
| * @return <code>true</code> if the given <code>region</code> has already been |
| * commented by this strategy, <code>false</code> otherwise |
| * |
| * @throws BadLocationException it is not the fault of the strategy if callers passes a bad |
| * <code>offset</code> and/or <code>length</code> for the given <code>model</code> |
| */ |
| public abstract boolean alreadyCommenting(IStructuredDocument document, IRegion region) throws BadLocationException; |
| |
| /** |
| * <p>Implementers should return a copy of themselves</p> |
| * <p>Allows the {@link CommentingStrategyRegistry} to create a {@link CommentingStrategy} for |
| * each of its associated content types.</p> |
| * |
| * @return implementers should return an object of type {@link CommentingStrategy} |
| * |
| * @see java.lang.Object#clone() |
| */ |
| public abstract Object clone(); |
| |
| /** |
| * <p>Determines if this strategy is applicable for the given regions for either commenting or un-commenting. |
| * For this strategy to be applicable the given regions must contain at least one or all of the |
| * {@link #fRequriedPartitionTypeIDs} (depending on the value of {@link #fRequireAllRequiredPartitionTypes}) |
| * or contain at least one region of type {@link #fAssociatedCommentPartitionTypeID}. Also if the value of |
| * {@link #fAllPartitionTypesAllowable} is <code>false</code> the given regions must all be of type |
| * {@link #fAllowablePartitionTypeIDs} and/or {@link #fRequriedPartitionTypeIDs} and/or |
| * {@link #fAssociatedCommentPartitionTypeID} otherwise the regions can be of any type except for they still |
| * must beet the required partition type requirements</p> |
| * |
| * @param regions determine if this strategy is applicable for these regions |
| * @return <code>true</code> if this strategy is applicable for the given <code>regions</code> |
| * <code>false</code> otherwise. |
| */ |
| public final boolean isApplicableFor(ITypedRegion[] regions) { |
| List partitionTypeIDs = getPartitionTypeIDs(regions); |
| |
| boolean foundAssociatedCommentPartitions = false; |
| if(this.fAssociatedCommentPartitionTypeID != null) { |
| foundAssociatedCommentPartitions = partitionTypeIDs.contains(this.fAssociatedCommentPartitionTypeID); |
| if(foundAssociatedCommentPartitions) { |
| //remove all instances of the comment partition type |
| boolean removed; |
| do { |
| removed = partitionTypeIDs.remove(this.fAssociatedCommentPartitionTypeID); |
| } while(removed); |
| } |
| } |
| |
| //determine if required partitions requirements are met |
| boolean requiredPartitionsRequirementsMet = !this.fHasRequiredPartitionTypes || |
| partitionTypeIDs.removeAll(this.fRequriedPartitionTypeIDs); |
| |
| //determine if allowable partitions requirements are met |
| boolean allowablePartitionsRequirementsMet = false; |
| if(this.fAllPartitionTypesAllowable) { |
| allowablePartitionsRequirementsMet = true; |
| } else { |
| partitionTypeIDs.removeAll(this.fAllowablePartitionTypeIDs); |
| |
| //at this point all required partitions and allowable partitions have been removed |
| allowablePartitionsRequirementsMet = partitionTypeIDs.size() == 0; |
| } |
| |
| return (requiredPartitionsRequirementsMet || foundAssociatedCommentPartitions) && allowablePartitionsRequirementsMet; |
| } |
| |
| /** |
| * <p>Convenience method to take a list of regions and create one encompassing region to pass to |
| * {@link #alreadyCommenting(IDocument, IRegion)}</p> |
| * |
| * @param document {@link IDocument} that contains the given <code>regions</code> |
| * @param regions {@link IRegion}s to combine into one region and pass onto |
| * {@link #alreadyCommenting(IDocument, IRegion)} |
| * |
| * @return the result of a call to {@link #alreadyCommenting(IDocument, IRegion)} combining |
| * all of the given <code>regions</code> into one region |
| * |
| * @throws BadLocationException it is not the fault of the strategy if callers passes a bad |
| * <code>offset</code> and/or <code>length</code> for the given <code>model</code> |
| */ |
| public final boolean alreadyCommenting(IStructuredDocument document, IRegion[] regions) throws BadLocationException { |
| boolean alreadyCommenting = false; |
| if(regions != null && regions.length > 0) { |
| //create one region spanning all the given regions |
| int offset = regions[0].getOffset(); |
| int length = regions[regions.length-1].getOffset() + |
| regions[regions.length-1].getLength() - offset; |
| |
| IRegion region = new Region(offset, length); |
| alreadyCommenting = this.alreadyCommenting(document, region); |
| } |
| |
| return alreadyCommenting; |
| } |
| /** |
| * <p>Given a list of {@link ITypedRegion}s returns the sub set of that list that |
| * are of the comment region type associated with this strategy</p> |
| * |
| * @param typedRegions {@link ITypedRegion}s to filter down to only the comment regions |
| * associated with this strategy |
| * |
| * @return {@link List} of {@link ITypedRegion}s from the given <code>typedRegions</code> |
| * that are of the comment partition type associated with this strategy |
| */ |
| protected List getAssociatedCommentedRegions(ITypedRegion[] typedRegions) { |
| List commentedRegions = new ArrayList(); |
| |
| for(int i = 0; i < typedRegions.length; ++i) { |
| if(typedRegions[i].getType().equals(this.fAssociatedCommentPartitionTypeID)) { |
| commentedRegions.add(typedRegions[i]); |
| } |
| } |
| |
| return commentedRegions; |
| } |
| |
| /** |
| * <p>Given a list of {@link ITypedRegion}s returns a list of the partition |
| * type IDs taken from the given regions.</p> |
| * |
| * @param regions {@link ITypedRegion}s to get the partition type IDs from |
| * @return {@link List} of the partition type IDs taken from the given <code>regions</code> |
| */ |
| private static List getPartitionTypeIDs(ITypedRegion[] regions) { |
| List partitionTypes = new ArrayList(regions.length); |
| for(int i = 0; i < regions.length; ++i) { |
| partitionTypes.add(regions[i].getType()); |
| } |
| |
| return partitionTypes; |
| } |
| |
| /** |
| * <p>This method modifies the given document to remove the given comment |
| * prefix at the given comment prefix offset and the given comment |
| * suffix at the given comment suffix offset. In the case of removing |
| * a line comment that does not have a suffix, pass <code>null</code> |
| * for the comment suffix and it and its associated offset will |
| * be ignored.</p> |
| * |
| * <p><b>NOTE:</b> it is a good idea if a model is at hand when calling this to |
| * warn the model of an impending update</p> |
| * |
| * @param document the document to remove the comment from |
| * @param commentPrefixOffset the offset of the comment prefix |
| * @param commentSuffixOffset the offset of the comment suffix |
| * (ignored if <code>commentSuffix</code> is <code>null</code>) |
| * @param commentPrefix the prefix of the comment to remove from its associated given offset |
| * @param commentSuffix the suffix of the comment to remove from its associated given offset, |
| * or null if there is not suffix to remove for this comment |
| */ |
| protected static void uncomment(IDocument document, int commentPrefixOffset, String commentPrefix, |
| int commentSuffixOffset, String commentSuffix) { |
| |
| try { |
| //determine if there is a space after the comment prefix that should also be removed |
| int commentPrefixLength = commentPrefix.length(); |
| String postCommentPrefixChar = document.get(commentPrefixOffset + commentPrefix.length(), 1); |
| if(postCommentPrefixChar.equals(" ")) { |
| commentPrefixLength++; |
| } |
| |
| //remove the comment prefix |
| document.replace(commentPrefixOffset, commentPrefixLength, ""); //$NON-NLS-1$ |
| |
| if(commentSuffix != null) { |
| commentSuffixOffset -= commentPrefixLength; |
| |
| //determine if there is a space before the comment suffix that should also be removed |
| int commentSuffixLength = commentSuffix.length(); |
| String preCommentSuffixChar = document.get(commentSuffixOffset-1, 1); |
| if(preCommentSuffixChar.equals(" ")) { |
| commentSuffixLength++; |
| commentSuffixOffset--; |
| } |
| |
| //remove the comment suffix |
| document.replace(commentSuffixOffset, commentSuffixLength, ""); //$NON-NLS-1$ |
| } |
| } |
| catch (BadLocationException e) { |
| Logger.log(Logger.WARNING_DEBUG, e.getMessage(), e); |
| } |
| } |
| } |