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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/search/most_visited_iframe_source.h"
      6 
      7 #include "base/metrics/histogram.h"
      8 #include "base/strings/string_number_conversions.h"
      9 #include "chrome/common/url_constants.h"
     10 #include "grit/browser_resources.h"
     11 #include "net/base/url_util.h"
     12 #include "url/gurl.h"
     13 
     14 namespace {
     15 
     16 const char kTitleHTMLPath[] = "/title.html";
     17 const char kTitleCSSPath[] = "/title.css";
     18 const char kTitleJSPath[] = "/title.js";
     19 const char kThumbnailHTMLPath[] = "/thumbnail.html";
     20 const char kThumbnailCSSPath[] = "/thumbnail.css";
     21 const char kThumbnailJSPath[] = "/thumbnail.js";
     22 const char kUtilJSPath[] = "/util.js";
     23 const char kCommonCSSPath[] = "/common.css";
     24 const char kLogHTMLPath[] = "/log.html";
     25 
     26 }  // namespace
     27 
     28 MostVisitedIframeSource::MostVisitedIframeSource() {
     29 }
     30 
     31 MostVisitedIframeSource::~MostVisitedIframeSource() {
     32 }
     33 
     34 const int MostVisitedIframeSource::kNumMostVisited = 8;
     35 const char MostVisitedIframeSource::kMostVisitedHistogramName[] =
     36     "NewTabPage.MostVisited";
     37 
     38 std::string MostVisitedIframeSource::GetSource() const {
     39   return chrome::kChromeSearchMostVisitedHost;
     40 }
     41 
     42 void MostVisitedIframeSource::StartDataRequest(
     43     const std::string& path_and_query,
     44     int render_process_id,
     45     int render_view_id,
     46     const content::URLDataSource::GotDataCallback& callback) {
     47   GURL url(chrome::kChromeSearchMostVisitedUrl + path_and_query);
     48   std::string path(url.path());
     49   if (path == kTitleHTMLPath) {
     50     SendResource(IDR_MOST_VISITED_TITLE_HTML, callback);
     51   } else if (path == kTitleCSSPath) {
     52     SendResource(IDR_MOST_VISITED_TITLE_CSS, callback);
     53   } else if (path == kTitleJSPath) {
     54     SendResource(IDR_MOST_VISITED_TITLE_JS, callback);
     55   } else if (path == kThumbnailHTMLPath) {
     56     SendResource(IDR_MOST_VISITED_THUMBNAIL_HTML, callback);
     57   } else if (path == kThumbnailCSSPath) {
     58     SendResource(IDR_MOST_VISITED_THUMBNAIL_CSS, callback);
     59   } else if (path == kThumbnailJSPath) {
     60     SendResource(IDR_MOST_VISITED_THUMBNAIL_JS, callback);
     61   } else if (path == kUtilJSPath) {
     62     SendResource(IDR_MOST_VISITED_UTIL_JS, callback);
     63   } else if (path == kCommonCSSPath) {
     64     SendResource(IDR_MOST_VISITED_IFRAME_CSS, callback);
     65   } else if (path == kLogHTMLPath) {
     66     // Log the clicked MostVisited element by position.
     67     std::string str_position;
     68     int position;
     69     if (net::GetValueForKeyInQuery(url, "pos", &str_position) &&
     70         base::StringToInt(str_position, &position))
     71       UMA_HISTOGRAM_ENUMERATION(kMostVisitedHistogramName, position,
     72                                 kNumMostVisited);
     73     callback.Run(NULL);
     74   } else {
     75     callback.Run(NULL);
     76   }
     77 }
     78 
     79 bool MostVisitedIframeSource::ServesPath(const std::string& path) const {
     80   return path == kTitleHTMLPath || path == kTitleCSSPath ||
     81          path == kTitleJSPath || path == kThumbnailHTMLPath ||
     82          path == kThumbnailCSSPath || path == kThumbnailJSPath ||
     83          path == kUtilJSPath || path == kCommonCSSPath || path == kLogHTMLPath;
     84 }
     85