org.gjt.sp.jedit.input
Class AbstractInputHandler<E extends JEditAbstractEditAction>

java.lang.Object
  org.gjt.sp.jedit.input.AbstractInputHandler<E>

Direct Known Subclasses:

InputHandler, TextAreaInputHandler

public abstract class AbstractInputHandler<E extends JEditAbstractEditAction>
extends java.lang.Object

The abstract input handler manage the keyboard handling. The entry point is processKeyEvent(java.awt.event.KeyEvent, int, boolean)

Field Summary

protected java.util.Hashtable	bindings
protected java.util.Hashtable	currentBindings
protected java.awt.event.KeyListener	keyEventInterceptor This listener will receive keyboard events if it is not null.
protected E	lastAction
protected int	lastActionCount
static java.lang.Object	PREFIX_STR
protected java.lang.String	readNextChar
protected static int	REPEAT_COUNT_THRESHOLD
protected int	repeatCount
protected boolean	shortcutOn

Constructor Summary

AbstractInputHandler()

Method Summary

void	addKeyBinding(java.lang.String keyBinding, E action) Adds a key binding to this input handler.
void	addKeyBinding(java.lang.String keyBinding, java.lang.Object action) Adds a key binding to this input handler.
void	addKeyBinding(java.lang.String keyBinding, java.lang.String action) Adds a key binding to this input handler.
java.lang.Object	getKeyBinding(java.lang.String keyBinding) Returns either an edit action, or a hashtable if the specified key is a prefix.
java.awt.event.KeyListener	getKeyEventInterceptor()
int	getLastActionCount() Returns the number of times the last action was executed.
abstract boolean	handleKey(KeyEventTranslator.Key keyStroke, boolean dryRun) Handles a keystroke.
abstract void	invokeAction(E action)
abstract void	invokeAction(java.lang.String action)
boolean	isPrefixActive() Returns if a prefix key has been pressed.
abstract void	processKeyEvent(java.awt.event.KeyEvent evt, int from, boolean global) Process a keyboard event.
protected void	processKeyEventKeyStrokeHandling(java.awt.event.KeyEvent evt, int from, java.lang.String mode, boolean global)
void	removeAllKeyBindings() Removes all key bindings from this input handler.
void	removeKeyBinding(java.lang.String keyBinding) Removes a key binding from this input handler.
void	resetLastActionCount() Resets the last action count.
protected void	sendShortcutPrefixOff() If
void	setBindings(java.util.Hashtable bindings) Replace the set of key bindings.
void	setCurrentBindings(java.util.Hashtable bindings)
void	setKeyEventInterceptor(java.awt.event.KeyListener keyEventInterceptor) Sets the listener that will handle all key events in this view.
static java.lang.String	toString(java.awt.event.KeyEvent evt) Return a String representation of the keyboard event for debugging purpose.

Methods inherited from class java.lang.Object

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

Field Detail

lastActionCount

protected int lastActionCount

keyEventInterceptor

protected java.awt.event.KeyListener keyEventInterceptor

This listener will receive keyboard events if it is not null.

readNextChar

protected java.lang.String readNextChar

repeatCount

protected int repeatCount

lastAction

protected E extends JEditAbstractEditAction lastAction

REPEAT_COUNT_THRESHOLD

protected static final int REPEAT_COUNT_THRESHOLD

See Also:

Constant Field Values

PREFIX_STR

public static java.lang.Object PREFIX_STR

shortcutOn

protected boolean shortcutOn

bindings

protected java.util.Hashtable bindings

currentBindings

protected java.util.Hashtable currentBindings

Constructor Detail

AbstractInputHandler

public AbstractInputHandler()

Method Detail

addKeyBinding

public void addKeyBinding(java.lang.String keyBinding,
                          java.lang.String action)

Adds a key binding to this input handler. The key binding is a list of white space separated key strokes of the form [modifiers+]key where modifier is C for Control, A for Alt, or S for Shift, and key is either a character (a-z) or a field name in the KeyEvent class prefixed with VK_ (e.g., BACK_SPACE)

Parameters:

keyBinding - The key binding

action - The action

Since:

jEdit 4.2pre1

addKeyBinding

public void addKeyBinding(java.lang.String keyBinding,
                          E action)

Adds a key binding to this input handler. The key binding is a list of white space separated key strokes of the form [modifiers+]key where modifier is C for Control, A for Alt, or S for Shift, and key is either a character (a-z) or a field name in the KeyEvent class prefixed with VK_ (e.g., BACK_SPACE)

Parameters:

keyBinding - The key binding

action - The action

addKeyBinding

public void addKeyBinding(java.lang.String keyBinding,
                          java.lang.Object action)

Adds a key binding to this input handler. The key binding is a list of white space separated key strokes of the form [modifiers+]key where modifier is C for Control, A for Alt, or S for Shift, and key is either a character (a-z) or a field name in the KeyEvent class prefixed with VK_ (e.g., BACK_SPACE)

Parameters:

keyBinding - The key binding

action - The action

Since:

jEdit 4.3pre1

removeKeyBinding

public void removeKeyBinding(java.lang.String keyBinding)

Removes a key binding from this input handler. This is not yet implemented.

Parameters:

keyBinding - The key binding

removeAllKeyBindings

public void removeAllKeyBindings()

Removes all key bindings from this input handler.

getKeyBinding

public java.lang.Object getKeyBinding(java.lang.String keyBinding)

Returns either an edit action, or a hashtable if the specified key is a prefix.

Parameters:

keyBinding - The key binding

Since:

jEdit 3.2pre5

getLastActionCount

public int getLastActionCount()

Returns the number of times the last action was executed. It can be used with smartHome and smartEnd

Returns:

the number of times the last action was executed

Since:

jEdit 2.5pre5

resetLastActionCount

public void resetLastActionCount()

Resets the last action count. This should be called when an editing operation that is not an action is invoked, for example a mouse click.

Since:

jEdit 4.0pre1

getKeyEventInterceptor

public java.awt.event.KeyListener getKeyEventInterceptor()

setKeyEventInterceptor

public void setKeyEventInterceptor(java.awt.event.KeyListener keyEventInterceptor)

Sets the listener that will handle all key events in this view. For example, the complete word command uses this so that all key events are passed to the word list popup while it is visible.

Parameters:

keyEventInterceptor - the KeyListener that will receive the events

isPrefixActive

public boolean isPrefixActive()

Returns if a prefix key has been pressed.

setBindings

public void setBindings(java.util.Hashtable bindings)

Replace the set of key bindings.

Since:

jEdit 4.3pre1

setCurrentBindings

public void setCurrentBindings(java.util.Hashtable bindings)

handleKey

public abstract boolean handleKey(KeyEventTranslator.Key keyStroke,
                                  boolean dryRun)

Handles a keystroke.

Parameters:

keyStroke - The key stroke.

dryRun - only calculate the return value, do not have any other effect

Returns:

true if the input could be handled.

Since:

jEdit 4.3pre7

processKeyEvent

public abstract void processKeyEvent(java.awt.event.KeyEvent evt,
                                     int from,
                                     boolean global)

Process a keyboard event. This is the entry point of the keyboard handling

Parameters:

evt - the keyboard event

from - the source, it can be View.VIEW, View.ACTION_BAR or View.TEXT_AREA

global - tell if the event comes from the DefaultKeyboardFocusManager or not

sendShortcutPrefixOff

protected void sendShortcutPrefixOff()

If

invokeAction

public abstract void invokeAction(java.lang.String action)

invokeAction

public abstract void invokeAction(E action)

toString

public static java.lang.String toString(java.awt.event.KeyEvent evt)

Return a String representation of the keyboard event for debugging purpose.

Parameters:

evt - the keyboard event

Returns:

a String representation for this keyboard event

Since:

jEdit 4.3pre15

processKeyEventKeyStrokeHandling

protected void processKeyEventKeyStrokeHandling(java.awt.event.KeyEvent evt,
                                                int from,
                                                java.lang.String mode,
                                                boolean global)

Parameters:

evt - the keyboard event

from - the source, it can be View.VIEW, View.ACTION_BAR or View.TEXT_AREA

mode - the mode is "press" or "type" and is used for debug only

global - tell if the event comes from the DefaultKeyboardFocusManager or not