RenameTagBeginOrEndIntentionAction.java

/*
 * Copyright 2000-2013 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.codeInspection.htmlInspections;

import com.intellij.codeInsight.daemon.XmlErrorMessages;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.xml.XmlTag;
import com.intellij.psi.xml.XmlToken;
import com.intellij.psi.xml.XmlTokenType;
import com.intellij.util.IncorrectOperationException;
import com.intellij.xml.util.XmlTagUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author spleaner
 */
public class RenameTagBeginOrEndIntentionAction implements IntentionAction {
  private final boolean myStart;
  private final String myTargetName;
  private final String mySourceName;

  RenameTagBeginOrEndIntentionAction(@NotNull final String targetName, @NotNull final String sourceName, final boolean start) {
    myTargetName = targetName;
    mySourceName = sourceName;
    myStart = start;
  }

  @Override
  @NotNull
  public String getFamilyName() {
    return getName();
  }

  @Override
  @NotNull
  public String getText() {
    return getName();
  }

  @Override
  public boolean isAvailable(@NotNull final Project project, final Editor editor, final PsiFile file) {
    return true;
  }

  @Override
  public void invoke(@NotNull final Project project, final Editor editor, final PsiFile file) throws IncorrectOperationException {
    final int offset = editor.getCaretModel().getOffset();
    PsiElement psiElement = file.findElementAt(offset);

    if (psiElement == null) return;

    if (psiElement instanceof PsiWhiteSpace) psiElement = PsiTreeUtil.prevLeaf(psiElement);
    if (psiElement instanceof XmlToken) {
      final IElementType tokenType = ((XmlToken)psiElement).getTokenType();
      if (tokenType != XmlTokenType.XML_NAME) {
        if (tokenType == XmlTokenType.XML_TAG_END) {
          psiElement = psiElement.getPrevSibling();
          if (psiElement == null) return;
        }
      }

      PsiElement target = null;
      final String text = psiElement.getText();
      if (!myTargetName.equals(text)) {
        target = psiElement;
      }
      else {
        // we're in the other
        target = findOtherSide(psiElement, myStart);
      }

      if (target != null) {
        final Document document = PsiDocumentManager.getInstance(project).getDocument(file);
        if (document != null) {
          final TextRange textRange = target.getTextRange();
          document.replaceString(textRange.getStartOffset(), textRange.getEndOffset(), myTargetName);
        }
      }

    }
  }

  @Nullable
  public static PsiElement findOtherSide(PsiElement psiElement, final boolean start) {
    PsiElement target = null;
    PsiElement parent = psiElement.getParent();
    if (parent instanceof PsiErrorElement) {
      parent = parent.getParent();
    }

    if (parent instanceof XmlTag) {
      if (start) {
        target = XmlTagUtil.getStartTagNameElement((XmlTag)parent);
      }
      else {
        target = XmlTagUtil.getEndTagNameElement((XmlTag)parent);
        if (target == null) {
          final PsiErrorElement errorElement = PsiTreeUtil.getChildOfType(parent, PsiErrorElement.class);
          target = XmlWrongClosingTagNameInspection.findEndTagName(errorElement);
        }
      }
    }
    return target;
  }

  @Override
  public boolean startInWriteAction() {
    return true;
  }

  @NotNull
  public String getName() {
    return myStart
           ? XmlErrorMessages.message("rename.start.tag.name.intention", mySourceName, myTargetName)
           : XmlErrorMessages.message("rename.end.tag.name.intention", mySourceName, myTargetName);
  }
}