chrome/browser/ui/search_engines/search_engine_tab_helper.cc

   1 // Copyright (c) 2012 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/ui/search_engines/search_engine_tab_helper.h"
   6
   7 #include "chrome/browser/profiles/profile.h"
   8 #include "chrome/browser/search_engines/template_url_fetcher_factory.h"
   9 #include "chrome/browser/search_engines/template_url_service_factory.h"
  10 #include "chrome/browser/ui/search_engines/search_engine_tab_helper_delegate.h"
  11 #include "chrome/common/render_messages.h"
  12 #include "chrome/common/url_constants.h"
  13 #include "components/search_engines/template_url.h"
  14 #include "components/search_engines/template_url_fetcher.h"
  15 #include "components/search_engines/template_url_service.h"
  16 #include "content/public/browser/favicon_status.h"
  17 #include "content/public/browser/navigation_controller.h"
  18 #include "content/public/browser/navigation_entry.h"
  19 #include "content/public/browser/render_frame_host.h"
  20 #include "content/public/browser/render_process_host.h"
  21 #include "content/public/browser/web_contents.h"
  22 #include "content/public/common/frame_navigate_params.h"
  23 #include "content/public/common/url_fetcher.h"
  24
  25 using content::NavigationController;
  26 using content::NavigationEntry;
  27 using content::WebContents;
  28
  29 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SearchEngineTabHelper);
  30
  31 namespace {
  32
  33 // Returns true if the entry's transition type is FORM_SUBMIT.
  34 bool IsFormSubmit(const NavigationEntry* entry) {
  35   return (content::PageTransitionStripQualifier(entry->GetTransitionType()) ==
  36           content::PAGE_TRANSITION_FORM_SUBMIT);
  37 }
  38
  39 base::string16 GenerateKeywordFromNavigationEntry(
  40     const NavigationEntry* entry) {
  41   // Don't autogenerate keywords for pages that are the result of form
  42   // submissions.
  43   if (IsFormSubmit(entry))
  44     return base::string16();
  45
  46   // We want to use the user typed URL if available since that represents what
  47   // the user typed to get here, and fall back on the regular URL if not.
  48   GURL url = entry->GetUserTypedURL();
  49   if (!url.is_valid()) {
  50     url = entry->GetURL();
  51     if (!url.is_valid())
  52       return base::string16();
  53   }
  54
  55   // Don't autogenerate keywords for referrers that are anything other than HTTP
  56   // or have a path.
  57   //
  58   // If we relax the path constraint, we need to be sure to sanitize the path
  59   // elements and update AutocompletePopup to look for keywords using the path.
  60   // See http://b/issue?id=863583.
  61   if (!url.SchemeIs(url::kHttpScheme) || (url.path().length() > 1))
  62     return base::string16();
  63
  64   return TemplateURL::GenerateKeyword(url);
  65 }
  66
  67 void AssociateURLFetcherWithWebContents(content::WebContents* web_contents,
  68                                         net::URLFetcher* url_fetcher) {
  69   content::AssociateURLFetcherWithRenderFrame(
  70       url_fetcher,
  71       web_contents->GetURL(),
  72       web_contents->GetRenderProcessHost()->GetID(),
  73       web_contents->GetMainFrame()->GetRoutingID());
  74 }
  75
  76 }  // namespace
  77
  78 SearchEngineTabHelper::~SearchEngineTabHelper() {
  79 }
  80
  81 void SearchEngineTabHelper::DidNavigateMainFrame(
  82     const content::LoadCommittedDetails& /*details*/,
  83     const content::FrameNavigateParams& params) {
  84   GenerateKeywordIfNecessary(params);
  85 }
  86
  87 bool SearchEngineTabHelper::OnMessageReceived(const IPC::Message& message) {
  88   bool handled = true;
  89   IPC_BEGIN_MESSAGE_MAP(SearchEngineTabHelper, message)
  90     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PageHasOSDD, OnPageHasOSDD)
  91     IPC_MESSAGE_UNHANDLED(handled = false)
  92   IPC_END_MESSAGE_MAP()
  93
  94   return handled;
  95 }
  96
  97 SearchEngineTabHelper::SearchEngineTabHelper(WebContents* web_contents)
  98     : content::WebContentsObserver(web_contents),
  99       weak_ptr_factory_(this) {
 100   DCHECK(web_contents);
 101 }
 102
 103 void SearchEngineTabHelper::OnPageHasOSDD(
 104     const GURL& page_url,
 105     const GURL& osdd_url,
 106     const search_provider::OSDDType& msg_provider_type) {
 107   // Checks to see if we should generate a keyword based on the OSDD, and if
 108   // necessary uses TemplateURLFetcher to download the OSDD and create a
 109   // keyword.
 110
 111   // Make sure that the page is the current page and other basic checks.
 112   if (!osdd_url.is_valid())
 113     return;
 114   Profile* profile =
 115       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 116   if (page_url != web_contents()->GetLastCommittedURL() ||
 117       !TemplateURLFetcherFactory::GetForProfile(profile) ||
 118       profile->IsOffTheRecord())
 119     return;
 120
 121   TemplateURLFetcher::ProviderType provider_type =
 122       (msg_provider_type == search_provider::AUTODETECTED_PROVIDER) ?
 123           TemplateURLFetcher::AUTODETECTED_PROVIDER :
 124           TemplateURLFetcher::EXPLICIT_PROVIDER;
 125
 126   // If the current page is a form submit, find the last page that was not a
 127   // form submit and use its url to generate the keyword from.
 128   const NavigationController& controller = web_contents()->GetController();
 129   const NavigationEntry* entry = controller.GetLastCommittedEntry();
 130   for (int index = controller.GetLastCommittedEntryIndex();
 131        (index > 0) && IsFormSubmit(entry);
 132        entry = controller.GetEntryAtIndex(index))
 133     --index;
 134   if (IsFormSubmit(entry))
 135     return;
 136
 137   // Autogenerate a keyword for the autodetected case; in the other cases we'll
 138   // generate a keyword later after fetching the OSDD.
 139   base::string16 keyword;
 140   if (provider_type == TemplateURLFetcher::AUTODETECTED_PROVIDER) {
 141     keyword = GenerateKeywordFromNavigationEntry(entry);
 142     if (keyword.empty())
 143       return;
 144   }
 145
 146   // Download the OpenSearch description document. If this is successful, a
 147   // new keyword will be created when done.
 148   TemplateURLFetcherFactory::GetForProfile(profile)->ScheduleDownload(
 149       keyword, osdd_url, entry->GetFavicon().url,
 150       base::Bind(&AssociateURLFetcherWithWebContents, web_contents()),
 151       base::Bind(&SearchEngineTabHelper::OnDownloadedOSDD,
 152                  weak_ptr_factory_.GetWeakPtr()),
 153       provider_type);
 154 }
 155
 156 void SearchEngineTabHelper::OnDownloadedOSDD(
 157     scoped_ptr<TemplateURL> template_url) {
 158   Profile* profile =
 159       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 160   delegate_->ConfirmAddSearchProvider(template_url.release(), profile);
 161 }
 162
 163 void SearchEngineTabHelper::GenerateKeywordIfNecessary(
 164     const content::FrameNavigateParams& params) {
 165   if (!params.searchable_form_url.is_valid())
 166     return;
 167
 168   Profile* profile =
 169       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 170   if (profile->IsOffTheRecord())
 171     return;
 172
 173   const NavigationController& controller = web_contents()->GetController();
 174   int last_index = controller.GetLastCommittedEntryIndex();
 175   // When there was no previous page, the last index will be 0. This is
 176   // normally due to a form submit that opened in a new tab.
 177   // TODO(brettw) bug 916126: we should support keywords when form submits
 178   //              happen in new tabs.
 179   if (last_index <= 0)
 180     return;
 181
 182   base::string16 keyword(GenerateKeywordFromNavigationEntry(
 183       controller.GetEntryAtIndex(last_index - 1)));
 184   if (keyword.empty())
 185     return;
 186
 187   TemplateURLService* url_service =
 188       TemplateURLServiceFactory::GetForProfile(profile);
 189   if (!url_service)
 190     return;
 191
 192   if (!url_service->loaded()) {
 193     url_service->Load();
 194     return;
 195   }
 196
 197   TemplateURL* current_url;
 198   GURL url = params.searchable_form_url;
 199   if (!url_service->CanReplaceKeyword(keyword, url, &current_url))
 200     return;
 201
 202   if (current_url) {
 203     if (current_url->originating_url().is_valid()) {
 204       // The existing keyword was generated from an OpenSearch description
 205       // document, don't regenerate.
 206       return;
 207     }
 208     url_service->Remove(current_url);
 209   }
 210
 211   TemplateURLData data;
 212   data.short_name = keyword;
 213   data.SetKeyword(keyword);
 214   data.SetURL(url.spec());
 215   DCHECK(controller.GetLastCommittedEntry());
 216   const GURL& current_favicon =
 217       controller.GetLastCommittedEntry()->GetFavicon().url;
 218   // If the favicon url isn't valid, it means there really isn't a favicon, or
 219   // the favicon url wasn't obtained before the load started. This assumes the
 220   // latter.
 221   // TODO(sky): Need a way to set the favicon that doesn't involve generating
 222   // its url.
 223   data.favicon_url = current_favicon.is_valid() ?
 224       current_favicon : TemplateURL::GenerateFaviconURL(params.referrer.url);
 225   data.safe_for_autoreplace = true;
 226   data.input_encodings.push_back(params.searchable_form_encoding);
 227   url_service->Add(new TemplateURL(data));
 228 }