Module jEdit
Package org.gjt.sp.jedit

Class Buffer

java.lang.Object
org.gjt.sp.jedit.buffer.JEditBuffer
org.gjt.sp.jedit.Buffer
public class Buffer extends JEditBuffer
A Buffer represents the contents of an open text file as it is maintained in the computer's memory (as opposed to how it may be stored on a disk).

In a BeanShell script, you can obtain the current buffer instance from the buffer variable.

This class does not have a public constructor. Buffers can be opened and closed using methods in the jEdit class.

This class is partially thread-safe, however you must pay attention to two very important guidelines:

  • Operations such as insert() and remove(), undo(), change Buffer data in a writeLock(), and must be called from the AWT thread.
  • When accessing the buffer from another thread, you must call readLock() before and readUnLock() after, if you plan on performing more than one read, to ensure that the buffer contents are not changed by the AWT thread for the duration of the lock. Only methods whose descriptions specify thread safety can be invoked from other threads.
Version:
$Id: Buffer.java 25241 2020-04-15 14:34:21Z kpouer $
Author:
Slava Pestov

  • Field Details

    • BACKED_UP

      public static final String BACKED_UP
      Backed up property.
      Since:
      jEdit 3.2pre2
      See Also:

    • CARET

      public static final String CARET
      Caret info properties.
      Since:
      jEdit 3.2pre1
      See Also:

    • CARET_POSITIONED

      public static final String CARET_POSITIONED
      See Also:

    • SELECTION

      public static final String SELECTION
      Stores a List of Selection instances.
      See Also:

    • SCROLL_VERT

      public static final String SCROLL_VERT
      This should be a physical line number, so that the scroll position is preserved correctly across reloads (which will affect virtual line numbers, due to fold being reset)
      See Also:

    • SCROLL_HORIZ

      public static final String SCROLL_HORIZ
      See Also:

    • ENCODING_AUTODETECT

      public static final String ENCODING_AUTODETECT
      Should jEdit try to set the encoding based on a UTF8, UTF16 or XML signature at the beginning of the file?
      See Also:

    • TRAILING_EOL

      public static final String TRAILING_EOL
      This property is set to 'true' if the file has a trailing newline.
      Since:
      jEdit 4.0pre1
      See Also:

    • GZIPPED

      public static final String GZIPPED
      This property is set to 'true' if the file should be GZipped.
      Since:
      jEdit 4.0pre4
      See Also:

    • FILE_NOT_CHANGED

      public static final int FILE_NOT_CHANGED
      See Also:

    • FILE_CHANGED

      public static final int FILE_CHANGED
      See Also:

    • FILE_DELETED

      public static final int FILE_DELETED
      See Also:

  • Method Details

    • reload

      public void reload(View view)
      Reloads the buffer from disk, asking for confirmation if the buffer has unsaved changes.
      Parameters:
      view - The view
      Since:
      jEdit 2.7pre2

    • load

      public boolean load(View view, boolean reload)
      Loads the buffer from disk.
      Parameters:
      view - The view
      reload - If true, user will not be asked to recover autosave file, if any
      Returns:
      true if loaded
      Since:
      2.5pre1

    • insertFile

      public boolean insertFile(View view, String path)
      Loads a file from disk, and inserts it into this buffer.
      Parameters:
      view - The view
      path - the path of the file to insert
      Returns:
      true if the file was inserted
      Since:
      4.0pre1

    • autosave

      public void autosave()
      Autosaves this buffer.

    • autosave

      public void autosave(boolean force)
      Autosaves this buffer.
      Parameters:
      force - save even if AUTOSAVE_DIRTY not set
      Since:
      jEdit 5.5pre1

    • saveAs

      public boolean saveAs(View view, boolean rename)
      Prompts the user for a file to save this buffer to.
      Parameters:
      view - The view
      rename - True if the buffer's path should be changed, false if only a copy should be saved to the specified filename
      Returns:
      true if the buffer was successfully saved
      Since:
      jEdit 2.6pre5

    • save

      public boolean save(View view, String path)
      Saves this buffer to the specified path name, or the current path name if it's null.
      Parameters:
      view - The view
      path - The path name to save the buffer to, or null to use
      Returns:
      true if the buffer was successfully saved the existing path

    • save

      public boolean save(View view, String path, boolean rename)
      Saves this buffer to the specified path name, or the current path name if it's null.
      Parameters:
      view - The view
      path - The path name to save the buffer to, or null to use the existing path
      rename - True if the buffer's path should be changed, false if only a copy should be saved to the specified filename
      Returns:
      true if the buffer was successfully saved
      Since:
      jEdit 2.6pre5

    • save

      public boolean save(View view, String path, boolean rename, boolean disableFileStatusCheck)
      Saves this buffer to the specified path name, or the current path name if it's null.
      Parameters:
      view - The view
      path - The path name to save the buffer to, or null to use the existing path
      rename - True if the buffer's path should be changed, false if only a copy should be saved to the specified filename
      disableFileStatusCheck - Disables file status checking regardless of the state of the checkFileStatus property
      Returns:
      true if the buffer was successfully saved

    • checkFileStatus

      public int checkFileStatus(View view)
      Check if the buffer has changed on disk.
      Parameters:
      view - the View
      Returns:
      One of FILE_NOT_CHANGED, FILE_CHANGED, or FILE_DELETED.
      Since:
      jEdit 4.2pre1

    • getLastModified

      public long getLastModified()
      Returns:
      the last time jEdit modified the file on disk. This method is thread-safe.

    • setLastModified

      public void setLastModified(long modTime)
      Sets the last time jEdit modified the file on disk.
      Parameters:
      modTime - The new modification time

    • getAutoReload

      public boolean getAutoReload()
      Returns:
      the status of the AUTORELOAD flag If true, reload changed files automatically

    • setAutoReload

      public void setAutoReload(boolean value)
      Sets the status of the AUTORELOAD flag
      Parameters:
      value - # If true, reload changed files automatically

    • getAutoReloadDialog

      public boolean getAutoReloadDialog()
      Returns:
      the status of the AUTORELOAD_DIALOG flag If true, prompt for reloading or notify user when the file has changed on disk

    • setAutoReloadDialog

      public void setAutoReloadDialog(boolean value)
      Sets the status of the AUTORELOAD_DIALOG flag
      Parameters:
      value - # If true, prompt for reloading or notify user when the file has changed on disk

    • getVFS

      public VFS getVFS()
      Returns the virtual filesystem responsible for loading and saving this buffer. This method is thread-safe.
      Returns:
      the VFS

    • getAutosaveFile

      public File getAutosaveFile()
      Returns:
      the autosave file for this buffer. This may be null if the file is non-local.

    • removeAutosaveFile

      public void removeAutosaveFile()
      Remove the autosave file.
      Since:
      jEdit 4.3pre12

    • getName

      public String getName()
      Returns:
      the name of this buffer. This method is thread-safe.

    • getPath

      public String getPath()
      Returns:
      the path name of this buffer. This method is thread-safe.

    • getPath

      public String getPath(Boolean shortVersion)
      Parameters:
      shortVersion - if true, replaces home path with ~/ on unix
      Returns:
      the path

    • getSymlinkPath

      public String getSymlinkPath()
      Returns:
      If this file is a symbolic link, returns the link destination. Otherwise returns the file's path. This method is thread-safe.
      Since:
      jEdit 4.2pre1

    • getDirectory

      public String getDirectory()
      Returns:
      the directory containing this buffer.
      Since:
      jEdit 4.1pre11

    • isClosed

      public boolean isClosed()
      Returns:
      true if this buffer has been closed with jEdit.closeBuffer(View,Buffer). This method is thread-safe.

    • isLoaded

      public boolean isLoaded()
      Returns:
      true if the buffer is loaded. This method is thread-safe.

    • isNewFile

      public boolean isNewFile()
      Returns:
      whether this buffer lacks a corresponding version on disk. This method is thread-safe.

    • setNewFile

      public void setNewFile(boolean newFile)
      Sets the new file flag.
      Parameters:
      newFile - The new file flag

    • isUntitled

      public boolean isUntitled()
      Returns:
      true if this file is 'untitled'. This method is thread-safe.

    • isTitled

      public boolean isTitled()
      Returns:
      true if this file is not'untitled'. This method is thread-safe.
      Since:
      jEdit 5.6pre1

    • setUntitled

      protected void setUntitled(boolean untitled)
      Parameters:
      untitled - untitled value to set
      Since:
      jEdit 5.5pre1

    • setDirty

      public void setDirty(boolean d)
      Sets the 'dirty' (changed since last save) flag of this buffer.
      Overrides:
      setDirty in class JEditBuffer
      Parameters:
      d - Sets the 'dirty' (changed since last save) flag of this buffer.

    • isTemporary

      public boolean isTemporary()
      Returns:
      if this is a temporary buffer. This method is thread-safe.
      Since:
      jEdit 2.2pre7
      See Also:

    • isBackup

      public boolean isBackup()
      Returns:
      if this buffer most probably contains backup file

    • isEditable

      public boolean isEditable()
      Overrides:
      isEditable in class JEditBuffer
      Returns:
      true if this file is editable, false otherwise. A file may become uneditable if it is read only, or if I/O is in progress. This method is thread-safe.

    • isLocked

      public boolean isLocked()
      Returns:
      if this buffer is locked for editing

    • setLocked

      public void setLocked(boolean locked)
      Changes locked state of the buffer.
      Parameters:
      locked - true to lock, false to unlock

    • toggleLocked

      public void toggleLocked(View view)
      Toggles locked state of the buffer.
      Parameters:
      view - We show a message in the view's status bar

    • getIcon

      public Icon getIcon()
      Returns:
      this buffer's icon.
      Since:
      jEdit 2.6pre6

    • propertiesChanged

      public void propertiesChanged()
      Reloads settings from the properties. This should be called after the syntax or folding buffer-local properties are changed.
      Overrides:
      propertiesChanged in class JEditBuffer

    • getDefaultProperty

      public Object getDefaultProperty(String name)
      Overrides:
      getDefaultProperty in class JEditBuffer

    • toggleWordWrap

      public void toggleWordWrap(View view)
      Toggles word wrap between the three available modes. This is used by the status bar.
      Parameters:
      view - We show a message in the view's status bar
      Since:
      jEdit 4.1pre3

    • toggleAutoIndent

      public void toggleAutoIndent(View view)
      Toggles automatic indentation on and off.
      Parameters:
      view - This view's status bar will display the message
      Since:
      jEdit 5.0

    • toggleLineSeparator

      public void toggleLineSeparator(View view)
      Toggles the line separator between the three available settings. This is used by the status bar.
      Parameters:
      view - We show a message in the view's status bar
      Since:
      jEdit 4.1pre3

    • getContextSensitiveProperty

      public String getContextSensitiveProperty(int offset, String name)
      Some settings, like comment start and end strings, can vary between different parts of a buffer (HTML text and inline JavaScript, for example).
      Overrides:
      getContextSensitiveProperty in class JEditBuffer
      Parameters:
      offset - The offset
      name - The property name
      Returns:
      the property value
      Since:
      jEdit 4.0pre3

    • setMode

      public void setMode()
      Sets this buffer's edit mode by calling the accept() method of each registered edit mode.

    • getFile

      @Deprecated public File getFile()
      Deprecated.
      Do not call this method, use getPath() instead.
      Returns:
      the file

    • getMarkers

      public Vector<Marker> getMarkers()
      Returns:
      a vector of markers.
      Since:
      jEdit 3.2pre1

    • getMarkerStatusPrompt

      public String getMarkerStatusPrompt(String action)
      Parameters:
      action - some action
      Returns:
      the status prompt for the given marker action. Only intended to be called from actions.xml.
      Since:
      jEdit 4.2pre2

    • getMarkerNameString

      public String getMarkerNameString()
      Returns:
      a string of all set markers, used by the status bar (eg, "a b $ % ^").
      Since:
      jEdit 4.2pre2

    • addOrRemoveMarker

      public void addOrRemoveMarker(char shortcut, int pos)
      If a marker is set on the line of the position, it is removed. Otherwise a new marker with the specified shortcut is added.
      Parameters:
      shortcut - The shortcut ('\0' if none)
      pos - The position of the marker
      Since:
      jEdit 3.2pre5

    • addMarker

      public void addMarker(char shortcut, int pos)
      Adds a marker to this buffer.
      Parameters:
      shortcut - The shortcut ('\0' if none)
      pos - The position of the marker
      Since:
      jEdit 3.2pre1

    • getMarkerInRange

      public Marker getMarkerInRange(int start, int end)
      Parameters:
      start - The start offset
      end - The end offset
      Returns:
      the first marker within the specified range.
      Since:
      jEdit 4.0pre4

    • getMarkerAtLine

      public Marker getMarkerAtLine(int line)
      Parameters:
      line - The line number
      Returns:
      the first marker at the specified line, or null if there is none.
      Since:
      jEdit 3.2pre2

    • removeMarker

      public void removeMarker(int line)
      Removes all markers at the specified line.
      Parameters:
      line - The line number
      Since:
      jEdit 3.2pre2

    • removeAllMarkers

      public void removeAllMarkers()
      Removes all defined markers.
      Since:
      jEdit 2.6pre1

    • getMarker

      public Marker getMarker(char shortcut)
      Parameters:
      shortcut - The shortcut
      Returns:
      the marker with the specified shortcut.
      Since:
      jEdit 3.2pre2

    • getMarkersPath

      public static String getMarkersPath(VFS vfs, String path)
      Returns the path for this buffer's markers file
      Parameters:
      vfs - The appropriate VFS
      path - the path of the buffer, it can be different from the field when using save-as
      Returns:
      the marker path
      Since:
      jEdit 4.3pre10

    • updateMarkersFile

      public boolean updateMarkersFile(View view)
      Save the markers file, or delete it when there are mo markers left Handling markers is now independent from saving the buffer. Changing markers will not set the buffer dirty any longer.
      Parameters:
      view - The current view
      Returns:
      true if markers were updated
      Since:
      jEdit 4.3pre7

    • markersChanged

      public boolean markersChanged()
      Returns:
      true when markers have changed and the markers file needs to be updated
      Since:
      jEdit 4.3pre7

    • setMarkersChanged

      public void setMarkersChanged(boolean changed)
      Sets/unsets the MARKERS_CHANGED flag
      Parameters:
      changed - changed
      Since:
      jEdit 4.3pre7

    • setWaitSocket

      public void setWaitSocket(Socket waitSocket)
      This socket is closed when the buffer is closed.
      Parameters:
      waitSocket - the socket

    • getNext

      public Buffer getNext()
      Returns:
      the next buffer in the list.

    • getPrev

      public Buffer getPrev()
      Returns:
      the previous buffer in the list.

    • setPrev

      public void setPrev(Buffer prev)

    • setNext

      public void setNext(Buffer next)

    • getIndex

      public int getIndex()
      Returns:
      the position of this buffer in the buffer list.

    • toString

      public String toString()
      Returns a string representation of this buffer. This simply returns the path name.
      Overrides:
      toString in class Object

    • addBufferUndoListener

      public void addBufferUndoListener(BufferUndoListener listener)
      Adds a buffer undo listener.
      Parameters:
      listener - The listener
      Since:
      jEdit 4.3pre18

    • removeBufferUndoListener

      public void removeBufferUndoListener(BufferUndoListener listener)
      Removes a buffer undo listener.
      Parameters:
      listener - The listener
      Since:
      jEdit 4.3pre18

    • close

      public void close()

    • markTokens

      protected TokenMarker.LineContext markTokens(Segment seg, TokenMarker.LineContext prevContext, TokenHandler _tokenHandler)
      Overrides:
      markTokens in class JEditBuffer

    • fireBeginUndo

      protected void fireBeginUndo()
      Overrides:
      fireBeginUndo in class JEditBuffer

    • fireEndUndo

      protected void fireEndUndo()
      Overrides:
      fireEndUndo in class JEditBuffer

    • fireBeginRedo

      protected void fireBeginRedo()
      Overrides:
      fireBeginRedo in class JEditBuffer

    • fireEndRedo

      protected void fireEndRedo()
      Overrides:
      fireEndRedo in class JEditBuffer