/*
* Copyright 2009 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.plugins.clojure.actions.editor;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.plugins.clojure.psi.ClojurePsiElement;
import org.jetbrains.plugins.clojure.psi.api.ClBraced;
import org.jetbrains.plugins.clojure.psi.util.ClojurePsiUtil;
/**
* An action to mimic the slurp command from <i>paredit.el</i>.
* <p>
* Slurping a sexp makes it 'swallow' the preceeding expression.
*
* @author <a href="mailto:ianp@ianp.org">Ian Phillips</a>
*/
public final class SlurpBackwardsAction extends ClojureEditorAction {
// TODO: Automatically reindent the slurped s-exp.
public SlurpBackwardsAction() {
super(new SlurpBackwardsActionHandler());
}
private static class SlurpBackwardsActionHandler extends AbstractSexpActionHandler {
protected SlurpBackwardsActionHandler() {
super(false);
}
@Override
protected void executeWriteAction(ClBraced sexp, Editor editor, Project project, DataContext dataContext) {
PsiElement slurpee = PsiTreeUtil.getPrevSiblingOfType(sexp, ClojurePsiElement.class);
if (slurpee == null) { return; }
PsiElement copy = slurpee.copy();
slurpee.delete();
sexp.addBefore(copy, ClojurePsiUtil.firstChildSexp(sexp));
}
}
}