org.eclipse.xtext.ui.editor.embedded

Class TextViewerAction

java.lang.Object

org.eclipse.core.commands.common.EventManager

org.eclipse.jface.action.AbstractAction

org.eclipse.jface.action.Action

org.eclipse.ui.texteditor.ResourceAction

org.eclipse.xtext.ui.editor.embedded.TextViewerAction

All Implemented Interfaces:

org.eclipse.jface.action.IAction, org.eclipse.ui.texteditor.IUpdate

Direct Known Subclasses:

TextViewerDeleteLineAction, TextViewerJoinLinesAction, TextViewerMarkAction, TextViewerMoveLinesAction, TextViewerOperationAction, TextViewerShiftAction

public abstract class TextViewerAction
extends org.eclipse.ui.texteditor.ResourceAction
implements org.eclipse.ui.texteditor.IUpdate

Skeleton of a standard text viewer action. The action is initially associated with a text viewer via the constructor, but can subsequently be changed using setViewer(ITextViewer) Subclasses must implement the run method and if required override the update method.

Subclasses that may modify the editor content should use canModifyViewer() in their update code to check whether updating the viewer is possible.

Since:

2.3

Author:

Sebastian Zarnekow - Initial contribution and API

Field Summary

Fields inherited from interface org.eclipse.jface.action.IAction

AS_CHECK_BOX, AS_DROP_DOWN_MENU, AS_PUSH_BUTTON, AS_RADIO_BUTTON, AS_UNSPECIFIED, CHECKED, DESCRIPTION, ENABLED, HANDLED, IMAGE, RESULT, TEXT, TOOL_TIP_TEXT

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TextViewerAction(ResourceBundle bundle, String prefix) Make sure the Viewer in set after calling this constructor and before calling update()
protected	TextViewerAction(ResourceBundle bundle, String prefix, org.eclipse.jface.text.ITextViewer viewer) Creates and initializes the action for the given text editor.
protected	TextViewerAction(ResourceBundle bundle, String prefix, org.eclipse.jface.text.ITextViewer viewer, int style) Creates and initializes the action for the given text editor.

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	canModifyViewer() Checks the viewer's modifiable state.
protected org.eclipse.jface.text.ITextSelection	getSelection(org.eclipse.jface.text.ITextViewer viewer) Returns the viewer's selection.
protected org.eclipse.jface.text.ITextViewer	getTextViewer() Returns the action's text editor.
void	setViewer(org.eclipse.jface.text.ITextViewer viewer) Retargets this action to the given editor.
void	update() Always enables this action if it is connected to a text editor.

Methods inherited from class org.eclipse.ui.texteditor.ResourceAction

getString, initialize, setHelpContextId

Methods inherited from class org.eclipse.jface.action.Action

convertAccelerator, convertAccelerator, findKeyCode, findKeyString, findModifier, findModifierString, getAccelerator, getActionDefinitionId, getDescription, getDisabledImageDescriptor, getHelpListener, getHoverImageDescriptor, getId, getImageDescriptor, getMenuCreator, getStyle, getText, getToolTipText, isChecked, isEnabled, isHandled, notifyResult, removeAcceleratorText, removeMnemonics, run, runWithEvent, setAccelerator, setActionDefinitionId, setChecked, setDescription, setDisabledImageDescriptor, setEnabled, setHelpListener, setHoverImageDescriptor, setId, setImageDescriptor, setMenuCreator, setText, setToolTipText

Methods inherited from class org.eclipse.jface.action.AbstractAction

addPropertyChangeListener, firePropertyChange, firePropertyChange, removePropertyChangeListener

Methods inherited from class org.eclipse.core.commands.common.EventManager

addListenerObject, clearListeners, getListeners, isListenerAttached, removeListenerObject

Methods inherited from class java.lang.Object

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

Constructor Detail

TextViewerAction

protected TextViewerAction(ResourceBundle bundle,
                String prefix,
                org.eclipse.jface.text.ITextViewer viewer)

Creates and initializes the action for the given text editor. The action configures its visual representation from the given resource bundle.

Parameters:

bundle - the resource bundle

prefix - a prefix to be prepended to the various resource keys (described in ResourceAction constructor), or null if none

viewer - the text viewer

See Also:

ResourceAction.ResourceAction(ResourceBundle, String)

TextViewerAction

protected TextViewerAction(ResourceBundle bundle,
                String prefix)

Make sure the Viewer in set after calling this constructor and before calling update()

TextViewerAction

protected TextViewerAction(ResourceBundle bundle,
                String prefix,
                org.eclipse.jface.text.ITextViewer viewer,
                int style)

Creates and initializes the action for the given text editor. The action configures its visual representation from the given resource bundle.

Parameters:

bundle - the resource bundle

prefix - a prefix to be prepended to the various resource keys (described in ResourceAction constructor), or null if none

viewer - the text editor

style - the style of this action

See Also:

ResourceAction.ResourceAction(ResourceBundle, String, int)

Method Detail

getTextViewer

protected org.eclipse.jface.text.ITextViewer getTextViewer()

Returns the action's text editor.

Returns:

the action's text editor

setViewer

public void setViewer(org.eclipse.jface.text.ITextViewer viewer)

Retargets this action to the given editor.

Parameters:

viewer - the new viewer, or null if none

update

public void update()

Always enables this action if it is connected to a text editor. If the associated editor is null, the action is disabled. Subclasses may override.

Specified by:

update in interface org.eclipse.ui.texteditor.IUpdate

canModifyViewer

protected boolean canModifyViewer()

Checks the viewer's modifiable state. Returns true if the viewer can be modified

Returns:

true if a modifying action should be enabled, false otherwise

getSelection

protected org.eclipse.jface.text.ITextSelection getSelection(org.eclipse.jface.text.ITextViewer viewer)

Returns the viewer's selection.

Parameters:

viewer - the viewer

Returns:

the viewer's selection