public static List<TextEdit> variablesToPositions(final TemplateVariable[] variables) {
final List<TextEdit> positions = new ArrayList<>(5);
for (final TemplateVariable variable : variables) {
final int[] offsets = variable.getOffsets();
// trim positions off whitespace
final String value = variable.getDefaultValue();
int wsStart = 0;
while (wsStart < value.length()
&& Character.isWhitespace(value.charAt(wsStart))
&& !isLineDelimiterChar(value.charAt(wsStart))) {
wsStart++;
}
variable.getValues()[0] = value.substring(wsStart);
for (int j = 0; j != offsets.length; j++) {
offsets[j] += wsStart;
positions.add(new RangeMarker(offsets[j], 0));
}
}
return positions;
}
/*
* @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;
}
}