com.intellij.openapi.diff.FileContent.java Source code

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Here is the source code for com.intellij.openapi.diff.FileContent.java

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/*
 * Copyright 2000-2014 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.ide.util.PsiNavigationSupport;
import com.intellij.openapi.application.ReadAction;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.pom.Navigatable;
import com.intellij.util.LineSeparator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.File;
import java.io.IOException;

public class FileContent extends DiffContent {
    @NotNull
    private final VirtualFile myFile;
    private Document myDocument;
    private final Project myProject;
    private final FileType myType;

    public FileContent(Project project, @NotNull VirtualFile file) {
        myProject = project;
        myFile = file;
        myType = file.getFileType();
    }

    @Override
    public Document getDocument() {
        if (myDocument == null && DiffContentUtil.isTextFile(myFile)) {
            myDocument = ReadAction.compute(() -> FileDocumentManager.getInstance().getDocument(myFile));
        }
        return myDocument;
    }

    @Override
    public Navigatable getOpenFileDescriptor(int offset) {
        return PsiNavigationSupport.getInstance().createNavigatable(myProject, myFile, offset);
    }

    @Override
    @NotNull
    public VirtualFile getFile() {
        return myFile;
    }

    @Override
    @Nullable
    public FileType getContentType() {
        return myType;
    }

    @Override
    public byte[] getBytes() throws IOException {
        if (myFile.isDirectory())
            return null;
        return myFile.contentsToByteArray();
    }

    @Override
    public boolean isBinary() {
        return !myFile.isDirectory() && myType.isBinary();
    }

    public static FileContent createFromTempFile(Project project, String name, String ext, byte @NotNull [] content)
            throws IOException {
        File tempFile = FileUtil.createTempFile(name, "." + ext);
        if (content.length != 0) {
            FileUtil.writeToFile(tempFile, content);
        }
        tempFile.deleteOnExit();
        final LocalFileSystem lfs = LocalFileSystem.getInstance();
        VirtualFile file = lfs.findFileByIoFile(tempFile);
        if (file == null) {
            file = lfs.refreshAndFindFileByIoFile(tempFile);
        }
        if (file != null) {
            return new FileContent(project, file);
        }
        throw new IOException("Can not create temp file for revision content");
    }

    @NotNull
    @Override
    public LineSeparator getLineSeparator() {
        return LineSeparator.fromString(FileDocumentManager.getInstance().getLineSeparator(myFile, myProject));
    }

}