/**
* Evaluates a 'java' template in the context of a compilation unit
*
* @param template the template to be evaluated
* @param compilationUnit the compilation unit in which to evaluate the template
* @param position the position inside the compilation unit for which to evaluate the template
* @return the evaluated template
* @throws CoreException in case the template is of an unknown context type
* @throws BadLocationException in case the position is invalid in the compilation unit
* @throws TemplateException in case the evaluation fails
*/
public static String evaluateTemplate(
Template template, ICompilationUnit compilationUnit, int position)
throws CoreException, BadLocationException, TemplateException {
TemplateContextType contextType =
JavaPlugin.getDefault()
.getTemplateContextRegistry()
.getContextType(template.getContextTypeId());
if (!(contextType instanceof CompilationUnitContextType))
throw new CoreException(
new Status(
IStatus.ERROR,
JavaUI.ID_PLUGIN,
IStatus.ERROR,
JavaTemplateMessages.JavaContext_error_message,
null));
IDocument document = new Document();
if (compilationUnit != null && compilationUnit.exists())
document.set(compilationUnit.getSource());
CompilationUnitContext context =
((CompilationUnitContextType) contextType)
.createContext(document, position, 0, compilationUnit);
context.setForceEvaluation(true);
TemplateBuffer buffer = context.evaluate(template);
if (buffer == null) return null;
return buffer.getString();
}
private int getCursorOffset(TemplateBuffer buffer) {
TemplateVariable[] variables = buffer.getVariables();
for (int i = 0; i != variables.length; i++) {
TemplateVariable variable = variables[i];
if (variable.getType().equals(GlobalTemplateVariables.Cursor.NAME))
return variable.getOffsets()[0];
}
return buffer.getString().length();
}
public static TemplateVariable findVariable(
final TemplateBuffer buffer, final String variableType) {
final TemplateVariable[] variables = buffer.getVariables();
for (final TemplateVariable cand : variables) {
if (variableType.equals(cand.getType())) {
return cand;
}
}
return null;
}
/** @param template */
protected void drop(Template template, int dropCaretOffset, int length) {
IDocument document = editor.getTextEditor().getTextViewer().getDocument();
ContextTypeRegistry registry = XMLUIPlugin.getDefault().getTemplateContextRegistry();
if (registry != null) {
TemplateContextType type = registry.getContextType(template.getContextTypeId());
DocumentTemplateContext templateContext =
new DocumentTemplateContext(type, document, new Position(dropCaretOffset, length));
if (templateContext.canEvaluate(template)) {
try {
TemplateBuffer templateBuffer = templateContext.evaluate(template);
String templateString = templateBuffer.getString();
document.replace(dropCaretOffset, length, templateString);
StyledText styledText = editor.getTextWidget();
int position = getCursorOffset(templateBuffer) + dropCaretOffset;
styledText.setCaretOffset(position);
styledText.setFocus();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}
/*
* @see ICompletionProposal#getAdditionalProposalInfo()
*/
@Override
public String getAdditionalProposalInfo() {
try {
fContext.setReadOnly(true);
TemplateBuffer templateBuffer;
try {
templateBuffer = fContext.evaluate(fTemplate);
} catch (TemplateException e) {
return null;
}
IDocument document = new Document(templateBuffer.getString());
IndentUtil.indentLines(document, new LineRange(0, document.getNumberOfLines()), null, null);
return document.get();
} catch (BadLocationException e) {
handleException(
JavaPlugin.getActiveWorkbenchShell(),
new CoreException(
new Status(
IStatus.ERROR, JavaPlugin.getPluginId(), IStatus.OK, "", e))); // $NON-NLS-1$
return null;
}
}
/**
* Evalute JDT template code snippet
*
* @param effect
* @param args
* @return
*/
private String evaluationJDTTemplate(Effect effect, TemplateBuffer buffer, Object[] args) {
// Prepare a hash map of snippet variables for use by formulas.
HashMap<String, String> variableMap = new HashMap<String, String>();
variableMap.put("cursor", "/*${cursor}*/");
for (int i = 0; i < args.length; i++) {
String value = (String) args[i];
variableMap.put(effect.getParameter(i).getName(), value);
}
StringBuilder sb = new StringBuilder(buffer.getString());
TemplateVariable[] variables = buffer.getVariables();
List<TemplateVariableElement> varList = new ArrayList<TemplateVariableElement>();
for (TemplateVariable var : variables) {
for (int off : var.getOffsets()) {
String value = variableMap.get(var.getName());
if (value != null)
varList.add(new TemplateVariableElement(off, off + var.getLength(), value));
}
}
for (int i = 0; i < varList.size(); i++)
for (int j = i + 1; j < varList.size(); j++) {
TemplateVariableElement itemi = varList.get(i);
TemplateVariableElement itemj = varList.get(j);
if (itemj.getStart() > itemi.getStart()) {
TemplateVariableElement temp = itemi;
varList.set(i, itemj);
varList.set(j, temp);
}
}
for (TemplateVariableElement item : varList) {
sb.replace(item.getStart(), item.getLength(), item.getValue());
}
return sb.toString();
}
public EvaluatedTemplate(final TemplateBuffer buffer, final String lineDelimiter) {
setContent(buffer.getString());
final TemplateVariable selectStartVariable =
findVariable(buffer, SourceEditorContextType.SELECT_START_VARIABLE);
final TemplateVariable selectEndVariable =
findVariable(buffer, SourceEditorContextType.SELECT_END_VARIABLE);
if (selectStartVariable != null && selectStartVariable.getOffsets().length == 1) {
fSelect =
new Region(
selectStartVariable.getOffsets()[0],
(selectEndVariable != null && selectEndVariable.getOffsets().length == 1)
? Math.max(
selectEndVariable.getOffsets()[0] - selectStartVariable.getOffsets()[0], 0)
: 0);
}
fLineDelimiter = lineDelimiter;
}
@Override
public void resolve(final TemplateBuffer buffer, final TemplateContext context)
throws MalformedTreeException, BadLocationException {
Assert.isNotNull(context);
final TemplateVariable[] variables = buffer.getVariables();
final IDocument document = new Document(buffer.getString());
final List<TextEdit> positions = TemplatesUtil.variablesToPositions(variables);
final List<TextEdit> edits = new ArrayList<>(5);
// iterate over all variables and try to resolve them
for (int i = 0; i != variables.length; i++) {
final TemplateVariable variable = variables[i];
if (variable.isUnambiguous()) {
continue;
}
// remember old values
final int[] oldOffsets = variable.getOffsets();
final int oldLength = variable.getLength();
final String oldValue = variable.getDefaultValue();
final String type = variable.getType();
TemplateVariableResolver resolver = getResolver(type);
if (resolver == null) {
resolver = new TemplateVariableResolver();
resolver.setType(type);
}
resolver.resolve(variable, context);
final String value = variable.getDefaultValue();
final String[] ln = document.getLegalLineDelimiters();
final boolean multiLine = (TextUtilities.indexOf(ln, value, 0)[0] != -1);
if (!oldValue.equals(value)) {
// update buffer to reflect new value
for (int k = 0; k != oldOffsets.length; k++) {
String thisValue = value;
if (multiLine) {
final String indent = TemplatesUtil.searchIndentation(document, oldOffsets[k]);
if (indent.length() > 0) {
final StringBuilder temp = new StringBuilder(thisValue);
int offset = 0;
while (true) {
final int[] search = TextUtilities.indexOf(ln, temp.toString(), offset);
if (search[0] == -1) {
break;
}
offset = search[0] + ln[search[1]].length();
temp.insert(offset, indent);
offset += indent.length();
}
thisValue = temp.toString();
}
}
edits.add(new ReplaceEdit(oldOffsets[k], oldLength, thisValue));
}
}
}
final MultiTextEdit edit = new MultiTextEdit(0, document.getLength());
edit.addChildren(positions.toArray(new TextEdit[positions.size()]));
edit.addChildren(edits.toArray(new TextEdit[edits.size()]));
edit.apply(document, TextEdit.UPDATE_REGIONS);
TemplatesUtil.positionsToVariables(positions, variables);
buffer.setContent(document.get(), variables);
}
/*
* @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;
}
}
