EditorContextDispatcher (Debugger Core

java.lang.Object
- org.netbeans.spi.debugger.ui.EditorContextDispatcher

```
public final class EditorContextDispatcher
extends Object
```
Dispatcher of context-related events and provider of active elements in the IDE.
This class tracks the changes of the selected file and active editor and re-fires the changes to registered listeners. The listeners can register based on a MIME type of files which they are interested in. This prevents from unnecessary activity of debugging actions when the context is switched among unrelated files.
The EditorContextDispatcher provides convenient access to currently selected elements and recently selected elements in the GUI.
Typical usage:
Attach a listener based on file MIME type. The usage of WeakListeners is preferred, unless the listener can be removed explicitely.
```
  EditorContextDispatcher.getDefault().addPropertyChangeListener("<MIME type>",
              WeakListeners.propertyChange(dispatchListener, EditorContextDispatcher.getDefault()));
 
```
Then use getCurrent*() methods to find the currently selected elements in the IDE. If recently selected elements are desired, use getMostRecent*() methods. They provide current elements if available, or elements that were current the last time.
Since:

2.13

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`PROP_EDITOR` Name of property fired when the current editor changes.
`static String`	`PROP_FILE` Name of property fired when the current file changes.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addPropertyChangeListener(PropertyChangeListener l)` Add a PropertyChangeListener to this context dispatcher.
`void`	`addPropertyChangeListener(String MIMEType, PropertyChangeListener l)` Add a PropertyChangeListener to this context dispatcher to be notified about changes of files with a specified MIME type.
`JEditorPane`	`getCurrentEditor()` Get the `JEditorPane` of currently edited file.
`FileObject`	`getCurrentFile()` Get the current active file.
`Line`	`getCurrentLine()` Get the line of the caret in the current editor.
`int`	`getCurrentLineNumber()` Get the line number of the caret in the current editor.
`String`	`getCurrentURLAsString()` Get the String representation of URL of the current active file.
`static EditorContextDispatcher`	`getDefault()` Get the default instance of EditorContextDispatcher.
`Set<String>`	`getMIMETypesOnCurrentLine()` Get a list of MIME types of languages found on the current line.
`Set<String>`	`getMIMETypesOnLine(Line line)` Get a list of MIME types of languages found on a line.
`JEditorPane`	`getMostRecentEditor()`
`FileObject`	`getMostRecentFile()` Get the most recent active file.
`Line`	`getMostRecentLine()` Get the line of the caret in the most recent editor.
`int`	`getMostRecentLineNumber()` Get the line number of the caret in the most recent editor.
`String`	`getMostRecentURLAsString()` Get the String representation of URL of the most recent active file.
`void`	`removePropertyChangeListener(PropertyChangeListener l)` Remove a PropertyChangeListener from this context dispatcher.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PROP_FILE
```
public static final String PROP_FILE
```
    Name of property fired when the current file changes.
    
    See Also:
    
    Constant Field Values
  - PROP_EDITOR
```
public static final String PROP_EDITOR
```
    Name of property fired when the current editor changes.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getDefault
```
public static EditorContextDispatcher getDefault()
```
    Get the default instance of EditorContextDispatcher.
    
    Returns:
    
    The EditorContextDispatcher
  - getCurrentFile
```
public FileObject getCurrentFile()
```
    Get the current active file.
    
    Returns:
    
    The current file or null when there is no active file.
  - getCurrentURLAsString
```
public String getCurrentURLAsString()
```
    Get the String representation of URL of the current active file.
    
    Returns:
    
    The String representation of URL of the current active file or an empty String when there is no active file.
  - getCurrentEditor
```
public JEditorPane getCurrentEditor()
```
    Get the JEditorPane of currently edited file.
    
    Returns:
    
    The current JEditorPane or null when there is no currently edited file.
  - getCurrentLineNumber
```
public int getCurrentLineNumber()
```
    Get the line number of the caret in the current editor.
    
    Returns:
    
    the line number or -1 when there is no current editor.
  - getCurrentLine
```
public Line getCurrentLine()
```
    Get the line of the caret in the current editor.
    
    Returns:
    
    the line or null when there is no current editor.
  - getMIMETypesOnCurrentLine
```
public Set<String> getMIMETypesOnCurrentLine()
```
    Get a list of MIME types of languages found on the current line.
    
    Returns:
    
    A set of MIME types.
    
    Since:
    
    2.50
  - getMIMETypesOnLine
```
public Set<String> getMIMETypesOnLine(Line line)
```
    Get a list of MIME types of languages found on a line.
    
    Parameters:
    
    line - The line to search for the MIME types.
    
    Returns:
    
    A set of MIME types.
    
    Since:
    
    2.50
  - getMostRecentFile
```
public FileObject getMostRecentFile()
```
    Get the most recent active file. This returns the active file if there's one, or a file, that was most recently active.
    
    Returns:
    
    The most recent file or null when there was no recent active file.
  - getMostRecentURLAsString
```
public String getMostRecentURLAsString()
```
    Get the String representation of URL of the most recent active file.
    
    Returns:
    
    The String representation of URL of the most recent file or an empty String when there was no recent active file.
  - getMostRecentEditor
```
public JEditorPane getMostRecentEditor()
```
  - getMostRecentLineNumber
```
public int getMostRecentLineNumber()
```
    Get the line number of the caret in the most recent editor. This returns the current line number in the current editor if there's one, or a line number of the caret in the editor, that was most recently active.
    
    Returns:
    
    the line number or -1 when there was no recent active editor.
  - getMostRecentLine
```
public Line getMostRecentLine()
```
    Get the line of the caret in the most recent editor. This returns the current line in the current editor if there's one, or a line of the caret in the editor, that was most recently active.
    
    Returns:
    
    the line or null when there was no recent active editor.
  - addPropertyChangeListener
```
public void addPropertyChangeListener(PropertyChangeListener l)
```
    Add a PropertyChangeListener to this context dispatcher. It's strongly suggested to use addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener) instead, if possible, for performance reasons.
    
    Parameters:
    
    l - The PropertyChangeListener
  - removePropertyChangeListener
```
public void removePropertyChangeListener(PropertyChangeListener l)
```
    Remove a PropertyChangeListener from this context dispatcher.
    
    Parameters:
    
    l - The PropertyChangeListener
  - addPropertyChangeListener
```
public void addPropertyChangeListener(String MIMEType,
                                      PropertyChangeListener l)
```
    Add a PropertyChangeListener to this context dispatcher to be notified about changes of files with a specified MIME type.
    
    Parameters:
    
    MIMEType - The MIME type to report changes for
    
    l - The PropertyChangeListener

Class EditorContextDispatcher

Typical usage:

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

PROP_FILE

PROP_EDITOR

Method Detail

getDefault

getCurrentFile

getCurrentURLAsString

getCurrentEditor

getCurrentLineNumber

getCurrentLine

getMIMETypesOnCurrentLine

getMIMETypesOnLine

getMostRecentFile

getMostRecentURLAsString

getMostRecentEditor

getMostRecentLineNumber

getMostRecentLine

addPropertyChangeListener

removePropertyChangeListener

addPropertyChangeListener