/*
* Copyright 2000-2009 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 com.intellij.codeInsight.hint;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Caret;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.annotations.RequiredDispatchThread;
/**
* @author ven
*/
public class PrevNextParameterHandler extends EditorActionHandler {
public PrevNextParameterHandler(boolean isNextParameterHandler) {
myIsNextParameterHandler = isNextParameterHandler;
}
private final boolean myIsNextParameterHandler;
@RequiredDispatchThread
@Override
protected boolean isEnabledForCaret(@NotNull Editor editor, @NotNull Caret caret, DataContext dataContext) {
Project project = CommonDataKeys.PROJECT.getData(dataContext);
if (project == null) return false;
PsiDocumentManager.getInstance(project).commitAllDocuments();
PsiElement exprList = getExpressionList(editor, caret.getOffset(), project);
if (exprList == null) return false;
int lbraceOffset = exprList.getTextRange().getStartOffset();
return ParameterInfoController.isAlreadyShown(editor, lbraceOffset) &&
ParameterInfoController.hasPrevOrNextParameter(editor, lbraceOffset, myIsNextParameterHandler);
}
@RequiredDispatchThread
@Override
protected void doExecute(Editor editor, @Nullable Caret caret, DataContext dataContext) {
int offset = caret != null ? caret.getOffset() : editor.getCaretModel().getOffset();
PsiElement exprList = getExpressionList(editor, offset, dataContext);
if (exprList != null) {
int listOffset = exprList.getTextRange().getStartOffset();
ParameterInfoController.prevOrNextParameter(editor, listOffset, myIsNextParameterHandler);
}
}
@Nullable
private static PsiElement getExpressionList(@NotNull Editor editor, int offset, DataContext dataContext) {
Project project = CommonDataKeys.PROJECT.getData(dataContext);
return project != null ? getExpressionList(editor, offset, project) : null;
}
@Nullable
private static PsiElement getExpressionList(@NotNull Editor editor, int offset, @NotNull Project project) {
PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());
return file != null ? ParameterInfoController.findArgumentList(file, offset, -1) : null;
}
}