Fix partially hidden article

java/org/chromium/distiller/ContentExtractor.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.distiller;
 
 import org.chromium.distiller.document.TextDocument;
 import org.chromium.distiller.document.TextDocumentStatistics;
 import org.chromium.distiller.extractors.ArticleExtractor;
 import org.chromium.distiller.proto.DomDistillerProtos.StatisticsInfo;
@@ skipping 26 matching lines @@
     private List<String> imageUrls;
     private String textDirection;
 
     private class WebDocumentInfo {
         WebDocument document;
         Set<Node> hiddenElements;
     }
 
     public ContentExtractor(Element root) {
         documentElement = root;
-        candidateTitles = new LinkedList<String>();
+        candidateTitles = new LinkedList<>();
         mTimingInfo = TimingInfo.create();
         mStatisticsInfo = StatisticsInfo.create();
 
         double startTime = DomUtil.getTime();
         parser = new MarkupParser(root, mTimingInfo);
         mTimingInfo.setMarkupParsingTime(DomUtil.getTime() - startTime);
         textDirection = "";
     }
 
     // Grabs a list of candidate titles in descending priority order:
@@ skipping 99 matching lines @@
     public List<String> getImageUrls() {
         return imageUrls;
     }
 
     /**
      * Converts the original HTML page into a WebDocument for analysis.
      */
     private WebDocumentInfo createWebDocumentInfoFromPage() {
         WebDocumentInfo info = new WebDocumentInfo();
         WebDocumentBuilder documentBuilder = new WebDocumentBuilder();
+
+        NodeList<Element> mobileViewport = DomUtil.querySelectorAll(documentElement,
+                "meta[name=\"viewport\"][content*=\"width=device-width\"]");
         DomConverter converter = new DomConverter(documentBuilder);
+        converter.setIsMobileFriendly(mobileViewport.getLength() > 0);
+
         Element walkerRoot = DomUtil.getArticleElement(documentElement);
-        if (walkerRoot == null) {
+        converter.setHasArticleElement(walkerRoot != null);
+
+        if (walkerRoot != null) {
+            if (LogUtil.isLoggable(LogUtil.DEBUG_LEVEL_BOILER_PIPE_PHASES)) {
+                LogUtil.logToConsole("Extracted article element: " + walkerRoot);
+            }
+        } else {
             walkerRoot = documentElement;
         }
         new DomWalker(converter).walk(walkerRoot);
         info.document = documentBuilder.toWebDocument();
         ensureTitleInitialized();
         info.hiddenElements = converter.getHiddenElements();
 
         return info;
     }
 
     /**
      * Implements the actual analysis of the page content, identifying the core elements of the
      * page.
      *
      * @param document the WebDocument representation of the page extracted from the DOM.
      */
     private void processDocument(WebDocument document) {
         TextDocument textDocument = document.createTextDocumentView();
         ArticleExtractor.INSTANCE.process(textDocument, candidateTitles);
         mStatisticsInfo.setWordCount(TextDocumentStatistics.countWordsInContent(textDocument));
         textDocument.applyToModel();
     }
 }