org.jeditor.gui

Class InputHandler

java.lang.Object

java.awt.event.KeyAdapter

org.jeditor.gui.InputHandler

All Implemented Interfaces:

java.awt.event.KeyListener, java.util.EventListener

Direct Known Subclasses:

DefaultInputHandler

public abstract class InputHandler
extends java.awt.event.KeyAdapter

An input handler converts the user's key strokes into concrete actions. It also takes care of macro recording and action repetition. This class provides all the necessary support code for an input handler, but doesn't actually do any key binding logic. It is up to the implementations of this class to do so.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	InputHandler.backspace
static class	InputHandler.backspace_word
static class	InputHandler.delete
static class	InputHandler.delete_word
static class	InputHandler.document_end
static class	InputHandler.document_home
static class	InputHandler.end
static class	InputHandler.home
static class	InputHandler.insert_break
static class	InputHandler.insert_char
static class	InputHandler.insert_tab
static interface	InputHandler.MacroRecorder Macro recorder.
static class	InputHandler.next_char
static class	InputHandler.next_line
static class	InputHandler.next_page
static class	InputHandler.next_word
static interface	InputHandler.NonRecordable If an action implements this interface, it should not be recorded by the macro recorder.
static interface	InputHandler.NonRepeatable If an action implements this interface, it should not be repeated.
static class	InputHandler.overwrite
static class	InputHandler.prev_char
static class	InputHandler.prev_line
static class	InputHandler.prev_page
static class	InputHandler.prev_word
static class	InputHandler.redo
static class	InputHandler.repeat
static class	InputHandler.select_all
static class	InputHandler.shift_left
static class	InputHandler.shift_right
static class	InputHandler.toggle_rect
static class	InputHandler.undo
static interface	InputHandler.Wrapper For use by EditAction.Wrapper only.

Field Summary

Fields

Modifier and Type	Field and Description
static java.awt.event.ActionListener	BACKSPACE
static java.awt.event.ActionListener	BACKSPACE_WORD
static java.awt.event.ActionListener	DELETE
static java.awt.event.ActionListener	DELETE_WORD
static java.awt.event.ActionListener	DOCUMENT_END
static java.awt.event.ActionListener	DOCUMENT_HOME
static java.awt.event.ActionListener	END
protected java.awt.event.ActionListener	grabAction
static java.awt.event.ActionListener	HOME
static java.awt.event.ActionListener	INSERT_BREAK
static java.awt.event.ActionListener	INSERT_CHAR
static java.awt.event.ActionListener	INSERT_TAB
static java.awt.event.ActionListener	NEXT_CHAR
static java.awt.event.ActionListener	NEXT_LINE
static java.awt.event.ActionListener	NEXT_PAGE
static java.awt.event.ActionListener	NEXT_WORD
static java.awt.event.ActionListener	OVERWRITE
static java.awt.event.ActionListener	PREV_CHAR
static java.awt.event.ActionListener	PREV_LINE
static java.awt.event.ActionListener	PREV_PAGE
static java.awt.event.ActionListener	PREV_WORD
protected InputHandler.MacroRecorder	recorder
static java.awt.event.ActionListener	REDO
protected boolean	repeat
static java.awt.event.ActionListener	REPEAT
protected int	repeatCount
static java.awt.event.ActionListener	SELECT_ALL
static java.awt.event.ActionListener	SELECT_DOC_END
static java.awt.event.ActionListener	SELECT_DOC_HOME
static java.awt.event.ActionListener	SELECT_END
static java.awt.event.ActionListener	SELECT_HOME
static java.awt.event.ActionListener	SELECT_NEXT_CHAR
static java.awt.event.ActionListener	SELECT_NEXT_LINE
static java.awt.event.ActionListener	SELECT_NEXT_PAGE
static java.awt.event.ActionListener	SELECT_NEXT_WORD
static java.awt.event.ActionListener	SELECT_PREV_CHAR
static java.awt.event.ActionListener	SELECT_PREV_LINE
static java.awt.event.ActionListener	SELECT_PREV_PAGE
static java.awt.event.ActionListener	SELECT_PREV_WORD
static java.awt.event.ActionListener	SHIFT_LEFT
static java.awt.event.ActionListener	SHIFT_RIGHT
static java.lang.String	SMART_HOME_END_PROPERTY If this client property is set to Boolean.TRUE on the text area, the home/end keys will support 'smart' BRIEF-like behaviour (one press = start/end of line, two presses = start/end of viewscreen, three presses = start/end of document).
static java.awt.event.ActionListener	TOGGLE_RECT
static java.awt.event.ActionListener	UNDO

Constructor Summary

Constructors

Constructor and Description
InputHandler()

Method Summary

Modifier and Type	Method and Description
abstract void	addDefaultKeyBindings() Adds the default key bindings to this input handler.
abstract void	addKeyBinding(java.lang.String keyBinding, java.awt.event.ActionListener action) Adds a key binding to this input handler.
abstract InputHandler	copy() Returns a copy of this input handler that shares the same key bindings.
void	executeAction(java.awt.event.ActionListener listener, java.lang.Object source, java.lang.String actionCommand) Executes the specified action, repeating and recording it as necessary.
static java.awt.event.ActionListener	getAction(java.lang.String name) Returns a named text area action.
static java.lang.String	getActionName(java.awt.event.ActionListener listener) Returns the name of the specified text area action.
static java.util.Set<java.lang.String>	getActions() Returns an keyset of all available actions.
InputHandler.MacroRecorder	getMacroRecorder() Returns the macro recorder.
int	getRepeatCount() Returns the number of times the next action will be repeated.
static JEditor	getTextArea(java.util.EventObject evt) Returns the text area that fired the specified event.
void	grabNextKeyStroke(java.awt.event.ActionListener listener) Grabs the next key typed event and invokes the specified action with the key as a the action command.
protected void	handleGrabAction(java.awt.event.KeyEvent evt) If a key is being grabbed, this method should be called with the appropriate key event.
boolean	isRepeatEnabled() Returns true if repeating is enabled.
abstract void	removeAllKeyBindings() Removes all key bindings from this input handler.
abstract void	removeKeyBinding(java.lang.String keyBinding) Removes a key binding from this input handler.
void	setMacroRecorder(InputHandler.MacroRecorder recorder) Sets the macro recorder.
void	setRepeatCount(int repeatCount) Sets the number of times the next action will be repeated.
void	setRepeatEnabled(boolean repeat) Enables repeating.

Methods inherited from class java.awt.event.KeyAdapter

keyPressed, keyReleased, keyTyped

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SMART_HOME_END_PROPERTY

public static final java.lang.String SMART_HOME_END_PROPERTY

If this client property is set to Boolean.TRUE on the text area, the home/end keys will support 'smart' BRIEF-like behaviour (one press = start/end of line, two presses = start/end of viewscreen, three presses = start/end of document). By default, this property is not set.

See Also:

Constant Field Values

BACKSPACE

public static final java.awt.event.ActionListener BACKSPACE

BACKSPACE_WORD

public static final java.awt.event.ActionListener BACKSPACE_WORD

DELETE

public static final java.awt.event.ActionListener DELETE

DELETE_WORD

public static final java.awt.event.ActionListener DELETE_WORD

END

public static final java.awt.event.ActionListener END

DOCUMENT_END

public static final java.awt.event.ActionListener DOCUMENT_END

SELECT_END

public static final java.awt.event.ActionListener SELECT_END

SELECT_DOC_END

public static final java.awt.event.ActionListener SELECT_DOC_END

INSERT_BREAK

public static final java.awt.event.ActionListener INSERT_BREAK

INSERT_TAB

public static final java.awt.event.ActionListener INSERT_TAB

HOME

public static final java.awt.event.ActionListener HOME

DOCUMENT_HOME

public static final java.awt.event.ActionListener DOCUMENT_HOME

SELECT_ALL

public static final java.awt.event.ActionListener SELECT_ALL

SELECT_HOME

public static final java.awt.event.ActionListener SELECT_HOME

SELECT_DOC_HOME

public static final java.awt.event.ActionListener SELECT_DOC_HOME

NEXT_CHAR

public static final java.awt.event.ActionListener NEXT_CHAR

NEXT_LINE

public static final java.awt.event.ActionListener NEXT_LINE

NEXT_PAGE

public static final java.awt.event.ActionListener NEXT_PAGE

NEXT_WORD

public static final java.awt.event.ActionListener NEXT_WORD

SELECT_NEXT_CHAR

public static final java.awt.event.ActionListener SELECT_NEXT_CHAR

SELECT_NEXT_LINE

public static final java.awt.event.ActionListener SELECT_NEXT_LINE

SELECT_NEXT_PAGE

public static final java.awt.event.ActionListener SELECT_NEXT_PAGE

SELECT_NEXT_WORD

public static final java.awt.event.ActionListener SELECT_NEXT_WORD

OVERWRITE

public static final java.awt.event.ActionListener OVERWRITE

PREV_CHAR

public static final java.awt.event.ActionListener PREV_CHAR

PREV_LINE

public static final java.awt.event.ActionListener PREV_LINE

PREV_PAGE

public static final java.awt.event.ActionListener PREV_PAGE

PREV_WORD

public static final java.awt.event.ActionListener PREV_WORD

SELECT_PREV_CHAR

public static final java.awt.event.ActionListener SELECT_PREV_CHAR

SELECT_PREV_LINE

public static final java.awt.event.ActionListener SELECT_PREV_LINE

SELECT_PREV_PAGE

public static final java.awt.event.ActionListener SELECT_PREV_PAGE

SELECT_PREV_WORD

public static final java.awt.event.ActionListener SELECT_PREV_WORD

REPEAT

public static final java.awt.event.ActionListener REPEAT

TOGGLE_RECT

public static final java.awt.event.ActionListener TOGGLE_RECT

SHIFT_LEFT

public static final java.awt.event.ActionListener SHIFT_LEFT

SHIFT_RIGHT

public static final java.awt.event.ActionListener SHIFT_RIGHT

UNDO

public static final java.awt.event.ActionListener UNDO

REDO

public static final java.awt.event.ActionListener REDO

INSERT_CHAR

public static final java.awt.event.ActionListener INSERT_CHAR

grabAction

protected java.awt.event.ActionListener grabAction

repeat

protected boolean repeat

repeatCount

protected int repeatCount

recorder

protected InputHandler.MacroRecorder recorder

Constructor Detail

InputHandler

public InputHandler()

Method Detail

getAction

public static java.awt.event.ActionListener getAction(java.lang.String name)

Returns a named text area action.

Parameters:

name - the action name

Returns:

the ActionListener

getActionName

public static java.lang.String getActionName(java.awt.event.ActionListener listener)

Returns the name of the specified text area action.

Parameters:

listener - the action

Returns:

the name of the action

getActions

public static java.util.Set<java.lang.String> getActions()

Returns an keyset of all available actions.

Returns:

the keyset

addDefaultKeyBindings

public abstract void addDefaultKeyBindings()

Adds the default key bindings to this input handler. This should not be called in the constructor of this input handler, because applications might load the key bindings from a file, etc.

addKeyBinding

public abstract void addKeyBinding(java.lang.String keyBinding,
                                   java.awt.event.ActionListener action)

Adds a key binding to this input handler.

Parameters:

keyBinding - The key binding (the format of this is input-handler specific)

action - The action

removeKeyBinding

public abstract void removeKeyBinding(java.lang.String keyBinding)

Removes a key binding from this input handler.

Parameters:

keyBinding - The key binding

removeAllKeyBindings

public abstract void removeAllKeyBindings()

Removes all key bindings from this input handler.

grabNextKeyStroke

public void grabNextKeyStroke(java.awt.event.ActionListener listener)

Grabs the next key typed event and invokes the specified action with the key as a the action command.

Parameters:

listener - The listener

isRepeatEnabled

public boolean isRepeatEnabled()

Returns true if repeating is enabled. When repeating is enabled, actions will be executed multiple times. This is usually invoked with a special key stroke in the input handler.

Returns:

true if repeating is enabled

setRepeatEnabled

public void setRepeatEnabled(boolean repeat)

Enables repeating. When repeating is enabled, actions will be executed multiple times. Once repeating is enabled, the input handler should read a number from the keyboard.

Parameters:

repeat - true if repeating is enabled

getRepeatCount

public int getRepeatCount()

Returns the number of times the next action will be repeated.

Returns:

the number of times the next action will be repeated

setRepeatCount

public void setRepeatCount(int repeatCount)

Sets the number of times the next action will be repeated.

Parameters:

repeatCount - The repeat count

getMacroRecorder

public InputHandler.MacroRecorder getMacroRecorder()

Returns the macro recorder. If this is non-null, all executed actions should be forwarded to the recorder.

Returns:

the macro recorder

setMacroRecorder

public void setMacroRecorder(InputHandler.MacroRecorder recorder)

Sets the macro recorder. If this is non-null, all executed actions should be forwarded to the recorder.

Parameters:

recorder - The macro recorder

copy

public abstract InputHandler copy()

Returns a copy of this input handler that shares the same key bindings. Setting key bindings in the copy will also set them in the original.

Returns:

a copy of this input handler

executeAction

public void executeAction(java.awt.event.ActionListener listener,
                          java.lang.Object source,
                          java.lang.String actionCommand)

Executes the specified action, repeating and recording it as necessary.

Parameters:

listener - The action listener

source - The event source

actionCommand - The action command

getTextArea

public static JEditor getTextArea(java.util.EventObject evt)

Returns the text area that fired the specified event.

Parameters:

evt - The event

Returns:

the JEditor

handleGrabAction

protected void handleGrabAction(java.awt.event.KeyEvent evt)

If a key is being grabbed, this method should be called with the appropriate key event. It executes the grab action with the typed character as the parameter.

Parameters:

evt - the KeyEvent