Java Code Examples for org.eclipse.jface.text.templates.DocumentTemplateContext#canEvaluate()

The following examples show how to use org.eclipse.jface.text.templates.DocumentTemplateContext#canEvaluate() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: JavaTemplatesPage.java    From Eclipse-Postfix-Code-Completion with Eclipse Public License 1.0 5 votes vote down vote up 
@Override
protected boolean isValidTemplate(IDocument document, Template template, int offset, int length) {
	String[] contextIds= getContextTypeIds(document, offset);
	for (int i= 0; i < contextIds.length; i++) {
		if (contextIds[i].equals(template.getContextTypeId())) {
			DocumentTemplateContext context= getContext(document, template, offset, length);
			return context.canEvaluate(template) || isTemplateAllowed(context, template);
		}
	}
	return false;
}
Example 2
Source File: SnippetCompletionProposal.java    From eclipse.jdt.ls with Eclipse Public License 2.0 4 votes vote down vote up 
private static List<CompletionItem> getGenericSnippets(SnippetCompletionContext scc) throws JavaModelException {
	List<CompletionItem> res = new ArrayList<>();
	CompletionContext completionContext = scc.getCompletionContext();
	char[] completionToken = completionContext.getToken();
	if (completionToken == null) {
		return Collections.emptyList();
	}
	int tokenLocation = completionContext.getTokenLocation();
	JavaContextType contextType = (JavaContextType) JavaLanguageServerPlugin.getInstance().getTemplateContextRegistry().getContextType(JavaContextType.ID_STATEMENTS);
	if (contextType == null) {
		return Collections.emptyList();
	}
	ICompilationUnit cu = scc.getCompilationUnit();
	IDocument document = new Document(cu.getSource());
	DocumentTemplateContext javaContext = contextType.createContext(document, completionContext.getOffset(), completionToken.length, cu);
	Template[] templates = null;
	if ((tokenLocation & CompletionContext.TL_STATEMENT_START) != 0) {
		templates = JavaLanguageServerPlugin.getInstance().getTemplateStore().getTemplates(JavaContextType.ID_STATEMENTS);
	} else {
		// We only support statement templates for now.
	}

	if (templates == null || templates.length == 0) {
		return Collections.emptyList();
	}

	for (Template template : templates) {
		if (!javaContext.canEvaluate(template)) {
			continue;
		}
		TemplateBuffer buffer = null;
		try {
			buffer = javaContext.evaluate(template);
		} catch (BadLocationException | TemplateException e) {
			JavaLanguageServerPlugin.logException(e.getMessage(), e);
			continue;
		}
		if (buffer == null) {
			continue;
		}
		String content = buffer.getString();
		if (Strings.containsOnlyWhitespaces(content)) {
			continue;
		}
		final CompletionItem item = new CompletionItem();
		item.setLabel(template.getName());
		item.setInsertText(content);
		item.setDetail(template.getDescription());
		setFields(item, cu);
		res.add(item);
	}

	return res;
}