package org.erlide.ui.templates;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IInformationControl;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.TemplateCompletionProcessor;
import org.eclipse.jface.text.templates.TemplateContext;
import org.eclipse.jface.text.templates.TemplateContextType;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Shell;
import org.erlide.ui.internal.ErlideUIPlugin;
import org.erlide.ui.prefs.PreferenceConstants;
import org.erlide.ui.views.SourceViewerInformationControl;
public class ErlTemplateCompletionProcessor extends TemplateCompletionProcessor {
private final IDocument fDocument;
private final int offset;
private final int length;
public ErlTemplateCompletionProcessor(final IDocument doc, final int offset,
final int length) {
super();
fDocument = doc;
this.offset = offset;
this.length = length;
}
@Override
protected TemplateContextType getContextType(final ITextViewer viewer,
final IRegion region) {
return ErlideUIPlugin.getDefault().getContextTypeRegistry()
.getContextType(ErlangTemplateContextType.ERLANG_CONTEXT_TYPE_ID);
}
@Override
protected Image getImage(final Template template) {
return null;
}
@Override
protected Template[] getTemplates(final String contextTypeId) {
final Template[] templates = ErlideUIPlugin.getDefault().getTemplateStore()
.getTemplates();
final TemplateContextType type = ErlideUIPlugin.getDefault()
.getContextTypeRegistry().getContextType(contextTypeId);
if (type instanceof ErlangTemplateContextType) {
final List<Template> result = new ArrayList<Template>(templates.length);
final ErlangTemplateContext etc = new ErlangTemplateContext(type, fDocument,
offset, length);
for (final Template template : templates) {
if (etc.canEvaluate(template)) {
result.add(template);
}
}
return result.toArray(new Template[result.size()]);
}
return templates;
}
@Override
protected ICompletionProposal createProposal(final Template template,
final TemplateContext context, final IRegion region, final int relevance) {
final ErlTemplateProposal p = new ErlTemplateProposal(template, context, region,
getImage(template), relevance);
p.setInformationControlCreator(new IInformationControlCreator() {
@Override
public IInformationControl createInformationControl(final Shell parent) {
return new SourceViewerInformationControl(parent,
PreferenceConstants.EDITOR_TEXT_FONT);
}
});
return p;
}
@Override
protected TemplateContext createContext(final ITextViewer viewer, final IRegion region) {
final TemplateContextType contextType = getContextType(viewer, region);
if (contextType instanceof ErlangTemplateContextType) {
final IDocument document = viewer.getDocument();
return new ErlangTemplateContext(contextType, document, region.getOffset(),
region.getLength());
}
return super.createContext(viewer, region);
}
}