| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.openapi.diff; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.editor.EditorFactory; |
| import com.intellij.openapi.editor.RangeMarker; |
| import com.intellij.openapi.editor.event.DocumentEvent; |
| import com.intellij.openapi.fileEditor.FileDocumentManager; |
| import com.intellij.openapi.fileEditor.OpenFileDescriptor; |
| import com.intellij.openapi.fileTypes.FileType; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Key; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.IOException; |
| |
| /** |
| * Represents sub text of other content. Original content should provide not null document. |
| */ |
| public class FragmentContent extends DiffContent { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.diff.FragmentContent"); |
| private final DiffContent myOriginal; |
| private final FileType myType; |
| private final MyDocumentsSynchronizer mySynchonizer; |
| public static final Key<Document> ORIGINAL_DOCUMENT = new Key<Document>("ORIGINAL_DOCUMENT"); |
| private final boolean myForceReadOnly; |
| |
| public FragmentContent(@NotNull DiffContent original, @NotNull TextRange range, Project project, VirtualFile file) { |
| this(original, range, project, file, false); |
| } |
| |
| public FragmentContent(@NotNull DiffContent original, @NotNull TextRange range, Project project, VirtualFile file, boolean forceReadOnly) { |
| this(original, range, project, file != null ? DiffContentUtil.getContentType(file) : null, forceReadOnly); |
| } |
| |
| public FragmentContent(@NotNull DiffContent original, @NotNull TextRange range, Project project, FileType fileType) { |
| this(original, range, project, fileType, false); |
| } |
| |
| public FragmentContent(@NotNull DiffContent original, @NotNull TextRange range, Project project, FileType fileType, boolean forceReadOnly) { |
| RangeMarker rangeMarker = original.getDocument().createRangeMarker(range.getStartOffset(), range.getEndOffset(), true); |
| rangeMarker.setGreedyToLeft(true); |
| rangeMarker.setGreedyToRight(true); |
| mySynchonizer = new MyDocumentsSynchronizer(project, rangeMarker); |
| myOriginal = original; |
| myType = fileType; |
| myForceReadOnly = forceReadOnly; |
| } |
| |
| public FragmentContent(DiffContent original, TextRange range, Project project) { |
| this(original, range, project, (FileType)null); |
| } |
| |
| private static String subText(Document document, int startOffset, int length) { |
| return document.getCharsSequence().subSequence(startOffset, startOffset + length).toString(); |
| } |
| |
| |
| @Override |
| public void onAssigned(boolean isAssigned) { |
| myOriginal.onAssigned(isAssigned); |
| mySynchonizer.listenDocuments(isAssigned); |
| super.onAssigned(isAssigned); |
| } |
| |
| @Override |
| @NotNull |
| public Document getDocument() { |
| return mySynchonizer.getCopy(); |
| } |
| |
| @Override |
| public OpenFileDescriptor getOpenFileDescriptor(int offset) { |
| return myOriginal.getOpenFileDescriptor(offset + mySynchonizer.getStartOffset()); |
| } |
| |
| @Override |
| public VirtualFile getFile() { |
| return null; |
| } |
| |
| @Override |
| @Nullable |
| public FileType getContentType() { |
| return myType != null ? myType : myOriginal.getContentType(); |
| } |
| |
| @Override |
| public byte[] getBytes() throws IOException { |
| return getDocument().getText().getBytes(); |
| } |
| |
| public static FragmentContent fromRangeMarker(RangeMarker rangeMarker, Project project) { |
| Document document = rangeMarker.getDocument(); |
| VirtualFile file = FileDocumentManager.getInstance().getFile(document); |
| FileType type = file.getFileType(); |
| return new FragmentContent(new DocumentContent(project, document), TextRange.create(rangeMarker), project, type); |
| } |
| |
| private class MyDocumentsSynchronizer extends DocumentsSynchronizer { |
| private final RangeMarker myRangeMarker; |
| |
| public MyDocumentsSynchronizer(Project project, @NotNull RangeMarker originalRange) { |
| super(project); |
| myRangeMarker = originalRange; |
| } |
| |
| public int getStartOffset() { |
| return myRangeMarker.getStartOffset(); |
| } |
| |
| @Override |
| protected void onOriginalChanged(@NotNull DocumentEvent event, @NotNull Document copy) { |
| if (!myRangeMarker.isValid()) { |
| fireContentInvalid(); |
| return; |
| } |
| replaceString(copy, 0, copy.getTextLength(), subText(event.getDocument(), myRangeMarker.getStartOffset(), getLength())); |
| } |
| |
| @Override |
| protected void beforeListenersAttached(@NotNull Document original, @NotNull Document copy) { |
| boolean readOnly = !copy.isWritable(); |
| if (readOnly) { |
| copy.setReadOnly(false); |
| } |
| replaceString(copy, 0, copy.getTextLength(), subText(original, myRangeMarker.getStartOffset(), getLength())); |
| copy.setReadOnly(readOnly); |
| } |
| |
| private int getLength() { |
| return myRangeMarker.getEndOffset() - myRangeMarker.getStartOffset(); |
| } |
| |
| @Override |
| protected Document createOriginal() { |
| return myRangeMarker.getDocument(); |
| } |
| |
| @NotNull |
| @Override |
| protected Document createCopy() { |
| final Document originalDocument = myRangeMarker.getDocument(); |
| String textInRange = |
| originalDocument.getCharsSequence().subSequence(myRangeMarker.getStartOffset(), myRangeMarker.getEndOffset()).toString(); |
| final Document result = EditorFactory.getInstance().createDocument(textInRange); |
| result.setReadOnly(myForceReadOnly || !originalDocument.isWritable()); |
| result.putUserData(ORIGINAL_DOCUMENT, originalDocument); |
| return result; |
| } |
| |
| @Override |
| protected void onCopyChanged(@NotNull DocumentEvent event, @NotNull Document original) { |
| final int originalOffset = event.getOffset() + myRangeMarker.getStartOffset(); |
| LOG.assertTrue(originalOffset >= 0); |
| if (!original.isWritable()) return; |
| final String newText = subText(event.getDocument(), event.getOffset(), event.getNewLength()); |
| final int originalEnd = originalOffset + event.getOldLength(); |
| replaceString(original, originalOffset, originalEnd, newText); |
| } |
| } |
| } |