/**
* Creates a style range for the text viewer.
*
* @param viewer the text viewer
* @return the new style range for the text viewer or <code>null</code>
*/
private StyleRange createStyleRange(ITextViewer viewer) {
StyledText text = viewer.getTextWidget();
if (text == null || text.isDisposed()) {
return null;
}
int widgetCaret = text.getCaretOffset();
int modelCaret = 0;
if (viewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
modelCaret = extension.widgetOffset2ModelOffset(widgetCaret);
} else {
IRegion visibleRegion = viewer.getVisibleRegion();
modelCaret = widgetCaret + visibleRegion.getOffset();
}
if (modelCaret >= getReplacementOffset() + getReplacementLength()) {
return null;
}
int length = getReplacementOffset() + getReplacementLength() - modelCaret;
Color foreground = getForegroundColor();
Color background = getBackgroundColor();
return new StyleRange(modelCaret, length, foreground, background);
}
private void restorePosition() {
if (fPosition != null && !fPosition.isDeleted() && fViewer.getDocument() != null) {
fViewer.setSelectedRange(fPosition.offset, fPosition.length);
fViewer.revealRange(fPosition.offset, fPosition.length);
}
fPosition = null;
}
/** Select the word at the current selection. */
protected void selectWord() {
if (matchWord()) {
if (fStartPos == fEndPos) fText.setSelectedRange(fStartPos, 0);
else fText.setSelectedRange(fStartPos + 1, fEndPos - fStartPos - 1);
}
}
/**
* Compute completion proposals.
*
* @param viewer the viewer
* @param documentOffset the document offset
* @return the i completion proposal[]
*/
@Override
public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentOffset) {
String text;
String prefix = "";
PropertyLabelLexer lexer = null;
PropertyLabelParser parser = null;
Collection<ICompletionProposal> result = null;
int selectionRange = 0;
try {
text = viewer.getDocument().get(0, documentOffset);
lexer = new PropertyLabelLexer(new ANTLRStringStream(text));
CommonTokenStream tokens = new CommonTokenStream(lexer);
parser = new PropertyLabelParser(tokens, property, new SimpleStringErrorReporter());
parser.setValidation(true);
selectionRange = viewer.getSelectedRange().y;
parser.label();
modifiersUsed = parser.getModifiersUsed();
result = computeCompletions(viewer, parser.getContext(), documentOffset, selectionRange);
} catch (BadLocationException e) {
e.printStackTrace();
} catch (RuntimeException e) {
modifiersUsed = parser.getModifiersUsed();
prefix = getPrefix(viewer, documentOffset);
result = computeCompletions(viewer, parser.getContext(), documentOffset, selectionRange);
} catch (RecognitionException e) {
modifiersUsed = parser.getModifiersUsed();
prefix = getPrefix(viewer, documentOffset);
result = computeCompletions(viewer, parser.getContext(), documentOffset, selectionRange);
}
return result.toArray(new ICompletionProposal[] {});
}
/**
* Implementation of the <code>IAction</code> prototype. Checks if the selected lines are all
* commented or not and uncomments/comments them respectively.
*/
@Override
public void run() {
if (fOperationTarget == null || fDocumentPartitioning == null || fPrefixesMap == null) return;
final int operationCode;
if (isSelectionCommented(fViewer.getSelectionProvider().getSelection()))
operationCode = ITextOperationTarget.STRIP_PREFIX;
else operationCode = ITextOperationTarget.PREFIX;
Shell shell = fViewer.getTextWidget().getShell();
if (!fOperationTarget.canDoOperation(operationCode)) {
if (shell != null)
MessageDialog.openError(
shell,
"An error occured",
"ToggleComment_error_message=An error occurred while toggling comments."); //$NON-NLS-1$//$NON-NLS-2$
return;
}
Display display = null;
if (shell != null && !shell.isDisposed()) display = shell.getDisplay();
BusyIndicator.showWhile(
display,
new Runnable() {
public void run() {
fOperationTarget.doOperation(operationCode);
}
});
}
/**
* Show completions at caret position. If current position does not contain quick fixes look for
* next quick fix on same line by moving from left to right and restarting at end of line if the
* beginning of the line is reached.
*
* @see org.eclipse.jface.text.quickassist.IQuickAssistAssistant#showPossibleQuickAssists()
*/
public String showPossibleQuickAssists() {
fPosition = null;
fCurrentAnnotations = null;
if (fViewer == null || fViewer.getDocument() == null)
// Let superclass deal with this
return super.showPossibleQuickAssists();
ArrayList resultingAnnotations = new ArrayList(20);
try {
Point selectedRange = fViewer.getSelectedRange();
int currOffset = selectedRange.x;
int currLength = selectedRange.y;
boolean goToClosest = (currLength == 0);
int newOffset =
collectQuickFixableAnnotations(fEditor, currOffset, goToClosest, resultingAnnotations);
if (newOffset != currOffset) {
storePosition(currOffset, currLength);
fViewer.setSelectedRange(newOffset, 0);
fViewer.revealRange(newOffset, 0);
}
} catch (BadLocationException e) {
JavaScriptPlugin.log(e);
}
fCurrentAnnotations =
(Annotation[]) resultingAnnotations.toArray(new Annotation[resultingAnnotations.size()]);
return super.showPossibleQuickAssists();
}
/**
* Inspects the context of the compilation unit around <code>completionPosition</code> and feeds
* the collector with proposals.
*
* @param viewer the text viewer
* @param completionPosition the context position in the document of the text viewer
* @param compilationUnit the compilation unit (may be <code>null</code>)
*/
public void complete(ITextViewer viewer, int completionPosition, IRubyScript compilationUnit) {
IDocument document = viewer.getDocument();
if (!(fContextType instanceof RubyScriptContextType)) return;
Point selection = viewer.getSelectedRange();
// remember selected text
String selectedText = null;
if (selection.y != 0) {
try {
selectedText = document.get(selection.x, selection.y);
} catch (BadLocationException e) {
}
}
RubyScriptContext context =
((RubyScriptContextType) fContextType)
.createContext(document, completionPosition, selection.y, compilationUnit);
context.setVariable("selection", selectedText); // $NON-NLS-1$
int start = context.getStart();
int end = context.getEnd();
IRegion region = new Region(start, end - start);
Template[] templates = RubyPlugin.getDefault().getTemplateStore().getTemplates();
if (selection.y == 0) {
for (int i = 0; i != templates.length; i++)
if (context.canEvaluate(templates[i]))
fProposals.add(
new TemplateProposal(
templates[i],
context,
region,
RubyPluginImages.get(RubyPluginImages.IMG_OBJS_TEMPLATE)));
} else {
if (context.getKey().length() == 0) context.setForceEvaluation(true);
boolean multipleLinesSelected = areMultipleLinesSelected(viewer);
for (int i = 0; i != templates.length; i++) {
Template template = templates[i];
if (context.canEvaluate(template)
&& template.getContextTypeId().equals(context.getContextType().getId())
&& (!multipleLinesSelected && template.getPattern().indexOf($_WORD_SELECTION) != -1
|| (multipleLinesSelected
&& template.getPattern().indexOf($_LINE_SELECTION) != -1))) {
fProposals.add(
new TemplateProposal(
templates[i],
context,
region,
RubyPluginImages.get(RubyPluginImages.IMG_OBJS_TEMPLATE)));
}
}
}
}
/**
* Select the area between the selected bracket and the closing bracket. Return true if
* successful.
*/
protected boolean selectBracketBlock() {
if (matchBracketsAt()) {
if (fStartPos == fEndPos) fText.setSelectedRange(fStartPos, 0);
else fText.setSelectedRange(fStartPos + 1, fEndPos - fStartPos - 1);
return true;
}
return false;
}
/**
* Returns the difference between the baseline of the widget and the baseline as specified by the
* font for <code>gc</code>. When drawing line numbers, the returned bias should be added to
* obtain text lined up on the correct base line of the text widget.
*
* @param gc the {@code GC} to get the font metrics from
* @param widgetLine the widget line
* @return the baseline bias to use when drawing text that is lined up with the text widget.
*/
private int getBaselineBias(GC gc, int widgetLine) {
ITextViewer textViewer = getParentRuler().getTextViewer();
int offset = textViewer.getTextWidget().getOffsetAtLine(widgetLine);
int widgetBaseline = textViewer.getTextWidget().getBaseline(offset);
FontMetrics fm = gc.getFontMetrics();
int fontBaseline = fm.getAscent() + fm.getLeading();
int baselineBias = widgetBaseline - fontBaseline;
return Math.max(0, baselineBias);
}
protected boolean selectComment(int caretPos) {
IDocument doc = fText.getDocument();
int startPos, endPos;
try {
int pos = caretPos;
char c = ' ';
while (pos >= 0) {
c = doc.getChar(pos);
if (c == '\\') {
pos -= 2;
continue;
}
if (c == Character.LINE_SEPARATOR || c == '\"') {
break;
}
--pos;
}
if (c != '\"') {
return false;
}
startPos = pos;
pos = caretPos;
int length = doc.getLength();
c = ' ';
while (pos < length) {
c = doc.getChar(pos);
if (c == Character.LINE_SEPARATOR || c == '\"') {
break;
}
++pos;
}
if (c != '\"') {
return false;
}
endPos = pos;
int offset = startPos + 1;
int len = endPos - offset;
fText.setSelectedRange(offset, len);
return true;
} catch (BadLocationException x) {
}
return false;
}
private static void applyProposal(
ICompletionProposal proposal,
ITextViewer viewer,
char trigger,
int stateMask,
final int offset) {
Assert.isTrue(proposal instanceof ICompletionProposalExtension2);
IRewriteTarget target = null;
IEditingSupportRegistry registry = null;
IEditingSupport helper =
new IEditingSupport() {
public boolean isOriginator(DocumentEvent event, IRegion focus) {
return focus.getOffset() <= offset && focus.getOffset() + focus.getLength() >= offset;
}
public boolean ownsFocusShell() {
return false;
}
};
try {
IDocument document = viewer.getDocument();
if (viewer instanceof ITextViewerExtension) {
ITextViewerExtension extension = (ITextViewerExtension) viewer;
target = extension.getRewriteTarget();
}
if (target != null) target.beginCompoundChange();
if (viewer instanceof IEditingSupportRegistry) {
registry = (IEditingSupportRegistry) viewer;
registry.register(helper);
}
((ICompletionProposalExtension2) proposal).apply(viewer, trigger, stateMask, offset);
Point selection = proposal.getSelection(document);
if (selection != null) {
viewer.setSelectedRange(selection.x, selection.y);
viewer.revealRange(selection.x, selection.y);
}
} finally {
if (target != null) target.endCompoundChange();
if (registry != null) registry.unregister(helper);
}
}
/**
* Returns the closest IStructuredDocumentRegion for the offest and viewer.
*
* @param viewer
* @param documentOffset
* @return the closest IStructuredDocumentRegion for the offest and viewer.
*/
public static IStructuredDocumentRegion getStructuredDocumentRegion(
ITextViewer viewer, int documentOffset) {
IStructuredDocumentRegion sdRegion = null;
if (viewer == null || viewer.getDocument() == null) return null;
int lastOffset = documentOffset;
IStructuredDocument doc = (IStructuredDocument) viewer.getDocument();
sdRegion = doc.getRegionAtCharacterOffset(documentOffset);
while (sdRegion == null && lastOffset >= 0) {
lastOffset--;
sdRegion = doc.getRegionAtCharacterOffset(lastOffset);
}
return sdRegion;
}
public static IJavaProject findJavaProject(ITextViewer viewer) {
if (viewer == null) return null;
IStructuredModel existingModelForRead =
StructuredModelManager.getModelManager().getExistingModelForRead(viewer.getDocument());
if (existingModelForRead == null) return null;
IJavaProject javaProject = null;
try {
String baseLocation = existingModelForRead.getBaseLocation();
// 20041129 (pa) the base location changed for XML model
// because of FileBuffers, so this code had to be updated
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=79686
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IPath filePath = new Path(baseLocation);
IProject project = null;
if (filePath.segmentCount() > 0) {
project = root.getProject(filePath.segment(0));
}
if (project != null) {
javaProject = JavaCore.create(project);
}
} catch (Exception ex) {
MapperPlugin.getDefault().logException(ex);
}
return javaProject;
}
/*
* @see org.eclipse.jface.text.IPainter#paint(int)
*/
public void paint(int reason) {
IDocument document = fTextViewer.getDocument();
if (document == null) {
deactivate(false);
return;
}
if (!fIsActive) {
fIsActive = true;
fTextWidget.addPaintListener(this);
redrawAll();
} else if (reason == CONFIGURATION || reason == INTERNAL) {
redrawAll();
} else if (reason == TEXT_CHANGE) {
// redraw current line only
try {
IRegion lineRegion =
document.getLineInformationOfOffset(getDocumentOffset(fTextWidget.getCaretOffset()));
int widgetOffset = getWidgetOffset(lineRegion.getOffset());
int charCount = fTextWidget.getCharCount();
int redrawLength = Math.min(lineRegion.getLength(), charCount - widgetOffset);
if (widgetOffset >= 0 && redrawLength > 0) {
fTextWidget.redrawRange(widgetOffset, redrawLength, true);
}
} catch (BadLocationException e) {
// ignore
}
}
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.ITextHoverExtension2#getHoverInfo2(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
*/
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
IJavaScriptStackFrame frame = getFrame();
if (frame != null) {
IDocument document = textViewer.getDocument();
if (document != null) {
try {
String variableName = document.get(hoverRegion.getOffset(), hoverRegion.getLength());
IVariable var = findLocalVariable(frame, variableName);
if (var != null) {
return var;
}
// might be in 'this'
var = frame.getThisObject();
try {
IValue val = var == null ? null : var.getValue();
if (val != null) {
IVariable[] vars = val.getVariables();
for (int i = 0; i < vars.length; i++) {
if (vars[i].getName().equals(variableName)) {
return vars[i];
}
}
}
} catch (DebugException de) {
return null;
}
} catch (BadLocationException e) {
return null;
}
}
}
return null;
}
/**
* Convert mouse screen coordinates to a <code>StyledText</code> offset.
*
* @param x screen X-coordinate
* @param y screen Y-coordinate
* @param absolute if <code>true</code>, coordinates are expected to be absolute screen
* coordinates
* @return text offset
* @see StyledText#getOffsetAtLocation()
*/
private int getOffsetAtLocation(int x, int y, boolean absolute) {
StyledText textWidget = fViewer.getTextWidget();
StyledTextContent content = textWidget.getContent();
Point location;
if (absolute) {
location = textWidget.toControl(x, y);
} else {
location = new Point(x, y);
}
int line = (textWidget.getTopPixel() + location.y) / textWidget.getLineHeight();
if (line >= content.getLineCount()) {
return content.getCharCount();
}
int lineOffset = content.getOffsetAtLine(line);
String lineText = content.getLine(line);
Point endOfLine = textWidget.getLocationAtOffset(lineOffset + lineText.length());
if (location.x >= endOfLine.x) {
return lineOffset + lineText.length();
}
try {
return textWidget.getOffsetAtLocation(location);
} catch (IllegalArgumentException iae) {
// we are expecting this
return -1;
}
}
protected List<IRegion> getAttributeValueRegions(ITextViewer viewer) {
List<IRegion> regions = new ArrayList<IRegion>();
IDocument document = viewer.getDocument();
int startOffset = 0;
int endOffset = document.getLength();
IStructuredDocumentRegion sdRegion = null;
while (startOffset < endOffset
&& (sdRegion = ContentAssistUtils.getStructuredDocumentRegion(viewer, startOffset))
!= null) {
ITextRegionList list = sdRegion.getRegions();
for (int i = 0; list != null && i < list.size(); i++) {
ITextRegion region = list.get(i);
if (region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE) {
final int regionOffset = sdRegion.getStartOffset() + region.getStart();
final int regionLength = region.getTextLength();
regions.add(new Region(regionOffset, regionLength));
}
}
startOffset += sdRegion.getLength();
}
return regions;
}
public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
List<ICompletionProposal> result = new ArrayList<ICompletionProposal>();
try {
IDocument document = viewer.getDocument();
ITypedRegion partition = document.getPartition(offset);
if (isOffsetValidForProposal(document, offset, partition.getOffset())) {
result.add(
new CompletionProposal("1 ", offset, 0, 2, null, "1 Heading level 1", null, null));
result.add(
new CompletionProposal("1.1 ", offset, 0, 4, null, "1.1 Heading level 2", null, null));
result.add(
new CompletionProposal(
"1.1.1 ", offset, 0, 6, null, "1.1.1 Heading level 3", null, null));
result.add(
new CompletionProposal(
"1.1.1.1 ", offset, 0, 8, null, "1.1.1.1 Heading level 4", null, null));
result.add(
new CompletionProposal(
"1.1.1.1.1 ", offset, 0, 10, null, "1.1.1.1.1 Heading level 5", null, null));
result.add(
new CompletionProposal(
"1.1.1.1.1.1 ", offset, 0, 12, null, "1.1.1.1.1.1 Heading level 6", null, null));
}
} catch (BadLocationException e) {
CoreLog.logError("Content assist error", e);
}
if (result.size() > 0) {
return result.toArray(new ICompletionProposal[result.size()]);
}
return null;
}
public SpellingHelper(ISpellingSupport support, ITextViewer viewer) {
this.support = support;
this.viewer = viewer;
this.control = viewer.getTextWidget();
this.contentAdapter = new StyledTextContentAdapter();
init(viewer);
}
/** Select the word at the current selection. Return true if successful, false otherwise. */
protected boolean matchWord() {
IDocument doc = fText.getDocument();
try {
int pos = fPos;
char c;
while (pos >= 0) {
c = doc.getChar(pos);
if (!Character.isJavaIdentifierPart(c)) break;
--pos;
}
fStartPos = pos;
pos = fPos;
int length = doc.getLength();
while (pos < length) {
c = doc.getChar(pos);
if (!Character.isJavaIdentifierPart(c)) break;
++pos;
}
fEndPos = pos;
return true;
} catch (BadLocationException x) {
}
return false;
}
private IHyperlink openModule(Node current, ITextViewer textViewer, int offset) {
while (current != null && !(current instanceof Element)) {
current = current.getParentNode();
}
if (current == null) {
return null;
}
String pathUp = XmlUtils.pathUp(current, 2);
if (!"modules/module".equals(pathUp)) { // $NON-NLS-1$
// just in case we are in some random plugin configuration snippet..
return null;
}
ITextFileBuffer buf =
FileBuffers.getTextFileBufferManager().getTextFileBuffer(textViewer.getDocument());
if (buf == null) {
// for repository based poms..
return null;
}
IFileStore folder = buf.getFileStore().getParent();
String path = XmlUtils.getTextValue(current);
final String fPath = path;
// construct IPath for the child pom file, handle relative paths..
while (folder != null && path.startsWith("../")) { // $NON-NLS-1$
folder = folder.getParent();
path = path.substring("../".length()); // $NON-NLS-1$
}
if (folder == null) {
return null;
}
IFileStore modulePom = folder.getChild(path);
if (!modulePom.getName().endsWith("xml")) { // $NON-NLS-1$
modulePom = modulePom.getChild("pom.xml"); // $NON-NLS-1$
}
final IFileStore fileStore = modulePom;
if (!fileStore.fetchInfo().exists()) {
return null;
}
assert current instanceof IndexedRegion;
final IndexedRegion region = (IndexedRegion) current;
return new IHyperlink() {
public IRegion getHyperlinkRegion() {
return new Region(region.getStartOffset(), region.getEndOffset() - region.getStartOffset());
}
public String getHyperlinkText() {
return NLS.bind(Messages.PomHyperlinkDetector_open_module, fPath);
}
public String getTypeLabel() {
return "pom-module"; //$NON-NLS-1$
}
public void open() {
openXmlEditor(fileStore);
}
};
}
/**
* Use hyperlink detectors to find a text viewer's hyperlinks and return the style ranges to
* render them.
*
* @param textViewer
* @param hyperlinkDetectors
* @return the style ranges to render the detected hyperlinks
*/
public static StyleRange[] getHyperlinkDetectorStyleRanges(
ITextViewer textViewer, IHyperlinkDetector[] hyperlinkDetectors) {
List<StyleRange> styleRangeList = new ArrayList<StyleRange>();
if (hyperlinkDetectors != null && hyperlinkDetectors.length > 0) {
for (int i = 0; i < textViewer.getTextWidget().getText().length(); i++) {
IRegion region = new Region(i, 0);
for (IHyperlinkDetector hyperLinkDetector : hyperlinkDetectors) {
IHyperlink[] hyperlinks = hyperLinkDetector.detectHyperlinks(textViewer, region, true);
if (hyperlinks != null) {
for (IHyperlink hyperlink : hyperlinks) {
StyleRange hyperlinkStyleRange =
new StyleRange(
hyperlink.getHyperlinkRegion().getOffset(),
hyperlink.getHyperlinkRegion().getLength(),
Display.getDefault().getSystemColor(SWT.COLOR_BLUE),
Display.getDefault().getSystemColor(SWT.COLOR_WHITE));
hyperlinkStyleRange.underline = true;
styleRangeList.add(hyperlinkStyleRange);
}
}
}
}
}
StyleRange[] styleRangeArray = new StyleRange[styleRangeList.size()];
styleRangeList.toArray(styleRangeArray);
return styleRangeArray;
}
@Override
public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
ICompletionProposal[] allProposals = super.computeCompletionProposals(viewer, offset);
List<ICompletionProposal> validProposals =
new ArrayList<ICompletionProposal>(allProposals.length);
for (ICompletionProposal proposal : allProposals) {
if (proposal instanceof ICompletionProposalExtension2) {
if (!((ICompletionProposalExtension2) proposal)
.validate(viewer.getDocument(), offset, null)) {
continue;
}
}
validProposals.add(proposal);
}
Collections.sort(
validProposals,
new Comparator<ICompletionProposal>() {
public int compare(ICompletionProposal o1, ICompletionProposal o2) {
return String.CASE_INSENSITIVE_ORDER.compare(
o1.getDisplayString(), o2.getDisplayString());
}
});
return validProposals.toArray(new ICompletionProposal[validProposals.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.ITextHover#getHoverInfo(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
*/
public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
ScriptStackFrame frame = getFrame();
if (frame == null) {
return null;
}
IDocument document = textViewer.getDocument();
if (document == null) {
return null;
}
try {
String str =
TextUtilities.getContentType(
document,
IDocumentExtension3.DEFAULT_PARTITIONING,
hoverRegion.getOffset() + 1,
true);
String variableName = document.get(hoverRegion.getOffset(), hoverRegion.getLength());
if (JSPartitionScanner.JS_KEYWORD.equals(str) && !"this".equals(variableName)) // $NON-NLS-1$
{
return null;
}
ScriptValue var = ((ScriptDebugTarget) frame.getDebugTarget()).evaluate(frame, variableName);
if (var != null) {
return getVariableText(var);
}
} catch (BadLocationException e) {
return null;
}
return null;
}
// similar to
// org.eclipse.jdt.internal.ui.text.correction.ModifierCorrectionSubProcessor.removeOverrideAnnotationProposal(..)
public void removeDeprecatedAnnotation(
IDocument document, ICompilationUnit cu, BodyDeclaration decl) {
Annotation annot = findAnnotation(decl.modifiers());
if (annot != null) {
ASTRewrite rewrite = ASTRewrite.create(annot.getAST());
rewrite.remove(annot, null);
callASTRewriteCorrectionProposal(getDisplayString(), cu, rewrite, 6, getImage(), document);
ITextViewer viewer = getViewer(JavaPlugin.getActivePage().getActiveEditor());
ITrackedNodePosition trackPos = rewrite.track(decl);
if (trackPos != null && viewer != null) {
viewer.setSelectedRange(trackPos.getStartPosition(), 0);
}
}
}
/*
* @see org.eclipse.ui.texteditor.AbstractTextEditor#isVisible(ISourceViewer, int, int)
*/
private /*static*/ final boolean isVisible(ITextViewer viewer, int offset, int length) {
if (viewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
IRegion overlap = extension.modelRange2WidgetRange(new Region(offset, length));
return overlap != null;
}
return viewer.overlapsWithVisibleRegion(offset, length);
}
/**
* @param textViewer check to see if this viewer is empty
* @return <code>true</code> if there is no text or it's all white space, <code>false</code>
* otherwise
*/
public static boolean isViewerEmpty(ITextViewer textViewer) {
boolean isEmpty = false;
String text = textViewer.getTextWidget().getText();
if ((text == null) || ((text != null) && text.trim().equals(""))) { // $NON-NLS-1$
isEmpty = true;
}
return isEmpty;
}
public void uninstall() {
if (isInstalled) {
textViewer.removeTextInputListener(textInputListener);
isInstalled = false;
if (documentListener != null) {
if (textViewer instanceof ISourceViewerExtension4) {
ContentAssistantFacade facade =
((ISourceViewerExtension4) textViewer).getContentAssistantFacade();
facade.removeCompletionListener(documentListener);
}
if (textViewer.getDocument() instanceof IXtextDocument) {
((IXtextDocument) textViewer.getDocument())
.removeXtextDocumentContentObserver(documentListener);
}
}
}
}
@SuppressWarnings("unchecked")
private List<ScriptVariable> getScriptVariables(final ITextViewer viewer) {
final List<ScriptVariable> result = new ArrayList<ScriptVariable>();
final List<ScriptVariable> nodes =
(List<ScriptVariable>)
viewer.getTextWidget().getData(GroovyViewer.PROCESS_VARIABLES_DATA_KEY);
if (nodes != null) {
result.addAll(nodes);
}
final List<ScriptVariable> providedScriptVariables =
(List<ScriptVariable>)
viewer.getTextWidget().getData(GroovyViewer.BONITA_KEYWORDS_DATA_KEY);
if (providedScriptVariables != null) {
result.addAll(providedScriptVariables);
}
return result;
}
/**
* Returns <code>true</code> if one line is completely selected or if multiple lines are selected.
* Being completely selected means that all characters except the new line characters are
* selected.
*
* @return <code>true</code> if one or multiple lines are selected
* @since 2.1
*/
private boolean areMultipleLinesSelected(ITextViewer viewer) {
if (viewer == null) return false;
Point s = viewer.getSelectedRange();
if (s.y == 0) return false;
try {
IDocument document = viewer.getDocument();
int startLine = document.getLineOfOffset(s.x);
int endLine = document.getLineOfOffset(s.x + s.y);
IRegion line = document.getLineInformation(startLine);
return startLine != endLine || (s.x == line.getOffset() && s.y == line.getLength());
} catch (BadLocationException x) {
return false;
}
}
