michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko;
michael@0: 
michael@0: import org.mozilla.gecko.util.StringUtils;
michael@0: 
michael@0: import android.net.Uri;
michael@0: 
michael@0: public class ReaderModeUtils {
michael@0:     private static final String LOGTAG = "ReaderModeUtils";
michael@0: 
michael@0:     public static String getUrlFromAboutReader(String aboutReaderUrl) {
michael@0:         return StringUtils.getQueryParameter(aboutReaderUrl, "url");
michael@0:     }
michael@0: 
michael@0:     public static boolean isEnteringReaderMode(String currentUrl, String newUrl) {
michael@0:         if (currentUrl == null || newUrl == null) {
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         if (!AboutPages.isAboutReader(newUrl)) {
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         String urlFromAboutReader = getUrlFromAboutReader(newUrl);
michael@0:         if (urlFromAboutReader == null) {
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         return urlFromAboutReader.equals(currentUrl);
michael@0:     }
michael@0: 
michael@0:     public static String getAboutReaderForUrl(String url) {
michael@0:         return getAboutReaderForUrl(url, -1);
michael@0:     }
michael@0: 
michael@0:     public static String getAboutReaderForUrl(String url, int tabId) {
michael@0:         String aboutReaderUrl = AboutPages.READER + "?url=" + Uri.encode(url);
michael@0: 
michael@0:         if (tabId >= 0) {
michael@0:             aboutReaderUrl += "&tabId=" + tabId;
michael@0:         }
michael@0: 
michael@0:         return aboutReaderUrl;
michael@0:     }
michael@0: }