DefaultBrowserTabChooser.java

/*
 * Copyright (c) 2013, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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.github.sdbg.debug.core.internal.util;

import com.github.sdbg.debug.core.internal.webkit.protocol.ChromiumTabInfo;
import com.github.sdbg.debug.core.util.IBrowserTabChooser;
import com.github.sdbg.debug.core.util.IBrowserTabInfo;

import java.util.List;

/**
 * An IBrowserTabChooser which tries to determine the best tab to debug algorithmically, without
 * asking the user.
 */
public class DefaultBrowserTabChooser implements IBrowserTabChooser {
  /** A fragment of the initial page, used to search for it in a list of open tabs. */
  private static final String CHROMIUM_INITIAL_PAGE_FRAGMENT = "chrome://version";

  public DefaultBrowserTabChooser() {

  }

  @Override
  public IBrowserTabInfo chooseTab(List<? extends IBrowserTabInfo> tabs) {
    for (IBrowserTabInfo tab : tabs) {
      if (tab.getTitle().contains(CHROMIUM_INITIAL_PAGE_FRAGMENT)) {
        return tab;
      }

      if (tab instanceof ChromiumTabInfo
          && ((ChromiumTabInfo) tab).getUrl().contains(CHROMIUM_INITIAL_PAGE_FRAGMENT)) {
        return tab;
      }
    }

    // Return the first visible, non-Chrome extension tab.
    for (IBrowserTabInfo tab : tabs) {
      if (!(tab instanceof ChromiumTabInfo) || !((ChromiumTabInfo) tab).isChromeExtension()) {
        return tab;
      }
    }

    return null;
  }

}