org.eclipse.xtext.ui.editor
Class XtextEditor.SmartLineStartAction

java.lang.Object
  org.eclipse.core.commands.common.EventManager
      org.eclipse.jface.action.AbstractAction
          org.eclipse.jface.action.Action
              org.eclipse.ui.texteditor.TextNavigationAction
                  org.eclipse.xtext.ui.editor.XtextEditor.SmartLineStartAction

All Implemented Interfaces:

org.eclipse.jface.action.IAction

Enclosing class:

XtextEditor

protected class XtextEditor.SmartLineStartAction
extends org.eclipse.ui.texteditor.TextNavigationAction

This action implements smart home. Instead of going to the start of a line it does the following: - if smart home/end is enabled and the caret is after the line's first non-whitespace then the caret is moved directly before it, taking comments into account. - if the caret is before the line's first non-whitespace the caret is moved to the beginning of the line - if the caret is at the beginning of the line see first case.

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

XtextEditor.SmartLineStartAction(org.eclipse.swt.custom.StyledText textWidget, boolean doSelect)
Creates a new smart line start action

Method Summary

protected int

getLineStartPosition(org.eclipse.jface.text.IDocument document, java.lang.String line, int length, int offset) Computes the offset of the line start position.

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

addPropertyChangeListener, fireSelectionChanged, fireSelectionChanged, getAccelerator, getDescription, getDisabledImageDescriptor, getHelpListener, getHoverImageDescriptor, getImageDescriptor, getMenuCreator, getStyle, getText, getTextWidget, getToolTipText, isChecked, isEnabled, removePropertyChangeListener, runWithEvent, setAccelerator, setChecked, setDescription, setDisabledImageDescriptor, setEnabled, setHelpListener, setHoverImageDescriptor, setImageDescriptor, setMenuCreator, setText, setToolTipText

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

convertAccelerator, convertAccelerator, findKeyCode, findKeyString, findModifier, findModifierString, getActionDefinitionId, getId, isHandled, notifyResult, removeAcceleratorText, removeMnemonics, setActionDefinitionId, setId

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

firePropertyChange, firePropertyChange

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

XtextEditor.SmartLineStartAction

public XtextEditor.SmartLineStartAction(org.eclipse.swt.custom.StyledText textWidget,
                                        boolean doSelect)

Creates a new smart line start action

Parameters:

textWidget - the styled text widget

doSelect - a boolean flag which tells if the text up to the beginning of the line should be selected

Method Detail

getLineStartPosition

protected int getLineStartPosition(org.eclipse.jface.text.IDocument document,
                                   java.lang.String line,
                                   int length,
                                   int offset)

Computes the offset of the line start position.

Parameters:

document - the document where to compute the line start position

line - the line to determine the start position of

length - the length of the line

offset - the caret position in the document

Returns:

the offset of the line start