/**
* 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);
}
/**
* 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;
}
/**
* 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);
}
/**
* 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;
}
}
public SpellingHelper(ISpellingSupport support, ITextViewer viewer) {
this.support = support;
this.viewer = viewer;
this.control = viewer.getTextWidget();
this.contentAdapter = new StyledTextContentAdapter();
init(viewer);
}
/**
* 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);
}
});
}
@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;
}
/**
* @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;
}
/**
* Creates a new painter for the given text viewer.
*
* @param textViewer the text viewer the painter should be attached to
*/
public WhitespaceCharacterPainter(ITextViewer textViewer) {
super();
fTextViewer = textViewer;
fTextWidget = textViewer.getTextWidget();
GC gc = new GC(fTextWidget);
gc.setAdvanced(true);
fIsAdvancedGraphicsPresent = gc.getAdvanced();
gc.dispose();
}
/**
* Called when Ctrl is selected during the completions
*
* @see
* org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#selected(org.eclipse.jface.text.ITextViewer,
* boolean)
*/
public void selected(ITextViewer viewer, boolean smartToggle) {
if (smartToggle) {
StyledText text = viewer.getTextWidget();
if (text == null || text.isDisposed()) {
return;
}
int widgetCaret = text.getCaretOffset();
IDocument document = viewer.getDocument();
int finalOffset = widgetCaret;
try {
if (finalOffset >= document.getLength()) {
unselected(viewer);
return;
}
char c;
do {
c = document.getChar(finalOffset);
finalOffset++;
} while (isValidChar(c) && finalOffset < document.getLength());
if (c == '(') {
fLastIsPar = true;
} else {
fLastIsPar = false;
}
if (!isValidChar(c)) {
finalOffset--;
}
this.fLen = finalOffset - widgetCaret;
this.getPresentationUpdater().updateStyle(viewer, widgetCaret, this.fLen);
} catch (BadLocationException e) {
Log.log(e);
}
} else {
unselected(viewer);
}
}
private void invalidateTextPresentation() {
if (fPresentation != null) {
fPresentation = null;
if (fViewer != null) {
Display display = fViewer.getTextWidget().getDisplay();
if (display.getThread() != Thread.currentThread()) {
display.asyncExec(
new Runnable() {
public void run() {
if (fViewer != null) {
fViewer.invalidateTextPresentation();
}
}
});
} else {
fViewer.invalidateTextPresentation();
}
}
}
}
private void updateStyle(ITextViewer viewer) {
StyledText text = viewer.getTextWidget();
int widgetOffset = getWidgetOffset(viewer, fRememberedStyleRange.start);
StyleRange range = new StyleRange(fRememberedStyleRange);
range.start = widgetOffset;
range.length = fRememberedStyleRange.length;
StyleRange currentRange = text.getStyleRangeAtOffset(widgetOffset);
if (currentRange != null) {
range.strikeout = currentRange.strikeout;
range.underline = currentRange.underline;
range.fontStyle = currentRange.fontStyle;
}
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34754
try {
text.setStyleRange(range);
} catch (IllegalArgumentException x) {
// catching exception as offset + length might be outside of the text widget
fRememberedStyleRange = null;
}
}
// modified version from TextViewer
private int computeOffsetAtLocation(ITextViewer textViewer, int x, int y) {
StyledText styledText = textViewer.getTextWidget();
IDocument document = textViewer.getDocument();
if (document == null) return -1;
try {
int widgetOffset = styledText.getOffsetAtLocation(new Point(x, y));
Point p = styledText.getLocationAtOffset(widgetOffset);
if (p.x > x) widgetOffset--;
if (textViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) textViewer;
return extension.widgetOffset2ModelOffset(widgetOffset);
} else {
IRegion visibleRegion = textViewer.getVisibleRegion();
return widgetOffset + visibleRegion.getOffset();
}
} catch (IllegalArgumentException e) {
return -1;
}
}
public static PeerCharacterCloser install(ITextViewer textViewer, char[] pairs) {
PeerCharacterCloser pairMatcher = new PeerCharacterCloser(textViewer, pairs);
textViewer.getTextWidget().addVerifyKeyListener(pairMatcher);
return pairMatcher;
}
/*
* @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#apply(org.eclipse.jface.text.ITextViewer, char, int, int)
*/
@Override
public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) {
IDocument document = viewer.getDocument();
try {
fContext.setReadOnly(false);
int start;
TemplateBuffer templateBuffer;
try {
beginCompoundChange(viewer);
int oldReplaceOffset = getReplaceOffset();
try {
// this may already modify the document (e.g. add imports)
templateBuffer = fContext.evaluate(fTemplate);
} catch (TemplateException e1) {
fSelectedRegion = fRegion;
return;
}
start = getReplaceOffset();
int shift = start - oldReplaceOffset;
int end = Math.max(getReplaceEndOffset(), offset + shift);
// insert template string
if (end > document.getLength()) end = offset;
String templateString = templateBuffer.getString();
document.replace(start, end - start, templateString);
} finally {
endCompoundChange(viewer);
}
// translate positions
LinkedModeModel model = new LinkedModeModel();
TemplateVariable[] variables = templateBuffer.getVariables();
MultiVariableGuess guess =
fContext instanceof CompilationUnitContext
? ((CompilationUnitContext) fContext).getMultiVariableGuess()
: null;
boolean hasPositions = false;
for (int i = 0; i != variables.length; i++) {
TemplateVariable variable = variables[i];
if (variable.isUnambiguous()) continue;
LinkedPositionGroup group = new LinkedPositionGroup();
int[] offsets = variable.getOffsets();
int length = variable.getLength();
LinkedPosition first;
if (guess != null && variable instanceof MultiVariable) {
first =
new VariablePosition(
document, offsets[0] + start, length, guess, (MultiVariable) variable);
guess.addSlave((VariablePosition) first);
} else {
String[] values = variable.getValues();
ICompletionProposal[] proposals = new ICompletionProposal[values.length];
for (int j = 0; j < values.length; j++) {
ensurePositionCategoryInstalled(document, model);
Position pos = new Position(offsets[0] + start, length);
document.addPosition(getCategory(), pos);
proposals[j] = new PositionBasedCompletionProposal(values[j], pos, length);
}
if (proposals.length > 1)
first = new ProposalPosition(document, offsets[0] + start, length, proposals);
else first = new LinkedPosition(document, offsets[0] + start, length);
}
for (int j = 0; j != offsets.length; j++)
if (j == 0) group.addPosition(first);
else group.addPosition(new LinkedPosition(document, offsets[j] + start, length));
model.addGroup(group);
hasPositions = true;
}
if (hasPositions) {
model.forceInstall();
JavaEditor editor = getJavaEditor();
if (editor != null) {
model.addLinkingListener(new EditorHighlightingSynchronizer(editor));
}
LinkedModeUI ui = new EditorLinkedModeUI(model, viewer);
ui.setExitPosition(viewer, getCaretOffset(templateBuffer) + start, 0, Integer.MAX_VALUE);
ui.enter();
fSelectedRegion = ui.getSelectedRegion();
} else {
fSelectedRegion = new Region(getCaretOffset(templateBuffer) + start, 0);
}
} catch (BadLocationException e) {
JavaPlugin.log(e);
openErrorDialog(viewer.getTextWidget().getShell(), e);
fSelectedRegion = fRegion;
} catch (BadPositionCategoryException e) {
JavaPlugin.log(e);
openErrorDialog(viewer.getTextWidget().getShell(), e);
fSelectedRegion = fRegion;
}
}
public void gotoMatchingBracket() {
ITextViewer sourceViewer = langEditor.getSourceViewer_();
IDocument document = sourceViewer.getDocument();
if (document == null) return;
IRegion selection = EditorUtils.getSignedSelection(sourceViewer);
if (fPreviousSelections == null) initializePreviousSelectionList();
IRegion region =
getBracketMatcher().match(document, selection.getOffset(), selection.getLength());
if (region == null) {
region =
getBracketMatcher()
.findEnclosingPeerCharacters(document, selection.getOffset(), selection.getLength());
initializePreviousSelectionList();
fPreviousSelections.add(selection);
} else {
if (fPreviousSelections.size() == 2) {
if (!selection.equals(fPreviousSelections.get(1))) {
initializePreviousSelectionList();
}
} else if (fPreviousSelections.size() == 3) {
if (selection.equals(fPreviousSelections.get(2))
&& !selection.equals(fPreviousSelections.get(0))) {
IRegion originalSelection = fPreviousSelections.get(0);
sourceViewer.setSelectedRange(
originalSelection.getOffset(), originalSelection.getLength());
sourceViewer.revealRange(originalSelection.getOffset(), originalSelection.getLength());
initializePreviousSelectionList();
return;
}
initializePreviousSelectionList();
}
}
if (region == null) {
langEditor.setStatusLineErrorMessage(
LangEditorMessages.GotoMatchingBracket_error_noMatchingBracket);
sourceViewer.getTextWidget().getDisplay().beep();
return;
}
int offset = region.getOffset();
int length = region.getLength();
if (length < 1) return;
int anchor = getBracketMatcher().getAnchor();
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
int targetOffset = (ICharacterPairMatcher.RIGHT == anchor) ? offset + 1 : offset + length - 1;
boolean visible = false;
if (sourceViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer;
visible = (extension.modelOffset2WidgetOffset(targetOffset) > -1);
} else {
IRegion visibleRegion = sourceViewer.getVisibleRegion();
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
visible =
(targetOffset >= visibleRegion.getOffset()
&& targetOffset <= visibleRegion.getOffset() + visibleRegion.getLength());
}
if (!visible) {
langEditor.setStatusLineErrorMessage(
LangEditorMessages.GotoMatchingBracket_error_bracketOutsideSelectedElement);
sourceViewer.getTextWidget().getDisplay().beep();
return;
}
int adjustment =
getBracketMatcher()
.getOffsetAdjustment(
document, selection.getOffset() + selection.getLength(), selection.getLength());
targetOffset += adjustment;
int direction = (selection.getLength() == 0) ? 0 : ((selection.getLength() > 0) ? 1 : -1);
if (fPreviousSelections.size() == 1 && direction < 0) {
targetOffset++;
}
if (fPreviousSelections.size() > 0) {
fPreviousSelections.add(new Region(targetOffset, direction));
}
sourceViewer.setSelectedRange(targetOffset, direction);
sourceViewer.revealRange(targetOffset, direction);
}