platform/lang-impl/src/com/intellij/codeInsight/highlighting/EscapeHandler.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.codeInsight.highlighting;

import com.intellij.find.FindManager;
import com.intellij.find.FindModel;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
import com.intellij.openapi.editor.markup.RangeHighlighter;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.wm.StatusBar;
import com.intellij.openapi.wm.WindowManager;

import java.util.Map;

public class EscapeHandler extends EditorActionHandler {
  private final EditorActionHandler myOriginalHandler;

  public EscapeHandler(EditorActionHandler originalHandler){
    myOriginalHandler = originalHandler;
  }

  @Override
  public void execute(Editor editor, DataContext dataContext){
    editor.setHeaderComponent(null);

    Project project = CommonDataKeys.PROJECT.getData(dataContext);
    if (project != null) {
      HighlightManagerImpl highlightManager = (HighlightManagerImpl)HighlightManager.getInstance(project);
      if (highlightManager != null && highlightManager.hideHighlights(editor, HighlightManager.HIDE_BY_ESCAPE | HighlightManager.HIDE_BY_ANY_KEY)) {

        StatusBar statusBar = WindowManager.getInstance().getStatusBar(project);
        if (statusBar != null) {
          statusBar.setInfo("");
        }

        FindManager findManager = FindManager.getInstance(project);
        if (findManager != null) {
          FindModel model = findManager.getFindNextModel(editor);
          if (model != null) {
            model.setSearchHighlighters(false);
            findManager.setFindNextModel(model);
          }
        }

        return;
      }
    }

    myOriginalHandler.execute(editor, dataContext);
  }

  @Override
  public boolean isEnabled(Editor editor, DataContext dataContext) {
    if (editor.hasHeaderComponent()) return true;
    Project project = CommonDataKeys.PROJECT.getData(dataContext);

    if (project != null) {
      HighlightManagerImpl highlightManager = (HighlightManagerImpl)HighlightManager.getInstance(project);
      if (highlightManager != null) {
        Map<RangeHighlighter, HighlightManagerImpl.HighlightInfo> map = highlightManager.getHighlightInfoMap(editor, false);
        if (map != null) {
          for (HighlightManagerImpl.HighlightInfo info : map.values()) {
            if (!info.editor.equals(editor)) continue;
            if ((info.flags & HighlightManager.HIDE_BY_ESCAPE) != 0) {
              return true;
            }
          }
        }
      }
    }

    return myOriginalHandler.isEnabled(editor, dataContext);
  }
}