org.eclipse.core.filebuffers/src/org/eclipse/core/filebuffers/ITextFileBufferManager.java

/*******************************************************************************
 * Copyright (c) 2000, 2009 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.core.filebuffers;


import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.internal.filebuffers.FileBuffersPlugin;

import org.eclipse.core.runtime.IPath;

import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.IAnnotationModel;


/**
 * A text file buffer manager manages text file buffers for files whose contents
 * is considered text.
 * <p>
 * Clients are not supposed to implement that interface.
 * </p>
 *
 * @since 3.0
 * @noimplement This interface is not intended to be implemented by clients.
 * @noextend This interface is not intended to be extended by clients.
 */
public interface ITextFileBufferManager extends IFileBufferManager {

	/**
	 * The default text file buffer manager.
	 * @since 3.3
	 */
	ITextFileBufferManager DEFAULT= FileBuffersPlugin.getDefault().getFileBufferManager();

	/**
	 * Returns the text file buffer managed for the file at the given location
	 * or <code>null</code> if either there is no such text file buffer.
	 * <p>
	 * The provided location is either a full path of a workspace resource or
	 * an absolute path in the local file system. The file buffer manager does
	 * not resolve the location of workspace resources in the case of linked
	 * resources.
	 * </p>
	 *
	 * @param location the location
	 * @return the text file buffer managed for that location or <code>null</code>
	 * @deprecated As of 3.3, replaced by {@link #getTextFileBuffer(IPath, LocationKind)}
	 */
	ITextFileBuffer getTextFileBuffer(IPath location);

	/**
	 * Returns the text file buffer managed for the file at the given location
	 * or <code>null</code> if there is no such text file buffer.
	 * <p>
	 * The type of the provided location is specified by the given
	 * <code>locationKind</code>.
	 * </p>
	 *
	 * @param location the location
	 * @param locationKind the kind of the given location
	 * @return the text file buffer managed for that location or <code>null</code>
	 * @see LocationKind
	 * @since 3.3
	 */
	ITextFileBuffer getTextFileBuffer(IPath location, LocationKind locationKind);

	/**
	 * Returns the text file buffer managed for the given file store
	 * or <code>null</code> if there is no such text file buffer.
	 * <p>
	 * <strong>Note:</strong> This API must not be used if the given file
	 * store maps to a resource contained in the workspace. A file buffer
	 * that has been connected using a path will not be found.
	 * </p>
	 * <p>
	 * We had to use a different name than <code>getTextFileBuffer</code> for this method
	 * due to https://bugs.eclipse.org/bugs/show_bug.cgi?id=148844
	 * </p>
	 *
	 * @param fileStore the file store
	 * @return the text file buffer managed for that file store or <code>null</code>
	 * @since 3.3
	 */
	ITextFileBuffer getFileStoreTextFileBuffer(IFileStore fileStore);

	/**
 	 * Returns the text file buffer managed for the given document
	 * or <code>null</code> if there is no such text file buffer.
	 * <p>
	 * <strong>Note:</strong> This method goes through the list
	 * of registered buffers and tests whether its document matches
	 * the given one. Therefore this method should not be used in
	 * performance critical code.
	 * </p>
	 *
	 * @param document the document for which to find the text file buffer
	 * @return the text file buffer managed for that document or <code>null</code>
	 * @since 3.3
	 */
	ITextFileBuffer getTextFileBuffer(IDocument document);

	/**
	 * Returns the default encoding that is used to read the contents of text files
	 * if no other encoding is specified.
	 *
	 * @return the default text file encoding
	 */
	String getDefaultEncoding();

	/**
	 * Creates a new empty document. The document is set up in the same way as it would be used in a
	 * text file buffer for a file at the given location.
	 * <p>
	 * The provided location is either a full path of a workspace resource or an absolute path in
	 * the local file system. The file buffer manager does not resolve the location of workspace
	 * resources in the case of linked resources.
	 * </p>
	 * 
	 * @param location the location used to set up the newly created document or <code>null</code>
	 *            if unknown
	 * @return a new empty document
	 * @deprecated As of 3.3, replaced by {@link #createEmptyDocument(IPath, LocationKind)}
	 */
	IDocument createEmptyDocument(IPath location);

	/**
	 * Creates a new empty document. The document is set up in the same way as it would be used in a
	 * text file buffer for a file at the given location.
	 * <p>
	 * The type of the provided location is specified by the given <code>locationKind</code>.
	 * </p>
	 * 
	 * @param location the location used to set up the newly created document or <code>null</code>
	 *            if unknown
	 * @param locationKind the kind of the given location
	 * @return a new empty document
	 * @since 3.3
	 */
	IDocument createEmptyDocument(IPath location, LocationKind locationKind);

	/**
	 * Creates a new annotation for the given location.
	 * <p>
	 * The provided location is either a full path of a workspace resource or an
	 * absolute path in the local file system. The file buffer manager does not
	 * resolve the location of workspace resources in the case of linked
	 * resources.
	 * </p>
	 *
	 * @param location the location used to create the new annotation model
	 * @return the newly created annotation model
	 * @deprecated As of 3.3, replaced by {@link #createAnnotationModel(IPath, LocationKind)}
	 */
	IAnnotationModel createAnnotationModel(IPath location);

	/**
	 * Creates a new annotation for the given location.
	 * <p>
	 * The type of the provided location is specified by the given
	 * <code>locationKind</code>.
	 * </p>
	 *
	 * @param location the location used to create the new annotation model
	 * @param locationKind the kind of the given location
	 * @return the newly created annotation model
	 * @since 3.3
	 */
	IAnnotationModel createAnnotationModel(IPath location, LocationKind locationKind);

	/**
	 * Returns whether a file at the given location is or can be considered a
	 * text file. If the file exists, the concrete content type of the file is
	 * checked. If the concrete content type for the existing file can not be
	 * determined, this method returns <code>true</code>. If the file does
	 * not exist, it is checked whether a text content type is associated with
	 * the given location. If no content type is associated with the location,
	 * this method returns <code>true</code>.
	 * <p>
	 * The provided location is either a full path of a workspace resource or an
	 * absolute path in the local file system. The file buffer manager does not
	 * resolve the location of workspace resources in the case of linked
	 * resources.
	 * </p>
	 *
	 * @param location the location to check
	 * @return <code>true</code> if the location is a text file location
	 * @since 3.1
	 * @deprecated As of 3.2, replaced by {@link #isTextFileLocation(IPath, boolean)}
	 */
	boolean isTextFileLocation(IPath location);
	/**
	 * Returns whether a file at the given location is or can be considered a
	 * text file. If the file exists, the concrete content type of the file is
	 * checked. If the concrete content type for the existing file can not be
	 * determined, this method returns <code>!strict</code>. If the file does
	 * not exist, it is checked whether a text content type is associated with
	 * the given location. If no content type is associated with the location,
	 * this method returns <code>!strict</code>.
	 * <p>
	 * The provided location is either a full path of a workspace resource or an
	 * absolute path in the local file system. The file buffer manager does not
	 * resolve the location of workspace resources in the case of linked
	 * resources.
	 * </p>
	 *
	 * @param location	the location to check
	 * @param strict	<code>true</code> if a file with unknown content type
	 * 					is not treated as text file, <code>false</code> otherwise
	 * @return <code>true</code> if the location is a text file location
	 * @since 3.2
	 */
	boolean isTextFileLocation(IPath location, boolean strict);
}