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      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/bookmarks/bookmark_tab_helper.h"
      6 
      7 #include "chrome/browser/bookmarks/bookmark_model.h"
      8 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
      9 #include "chrome/browser/defaults.h"
     10 #include "chrome/browser/prefs/pref_service_syncable.h"
     11 #include "chrome/browser/profiles/profile.h"
     12 #include "chrome/browser/search/search.h"
     13 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper_delegate.h"
     14 #include "chrome/browser/ui/bookmarks/bookmark_utils.h"
     15 #include "chrome/browser/ui/sad_tab.h"
     16 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
     17 #include "chrome/common/pref_names.h"
     18 #include "content/public/browser/navigation_entry.h"
     19 #include "content/public/browser/web_contents.h"
     20 
     21 namespace {
     22 
     23 bool IsNTPWebUI(content::WebContents* web_contents) {
     24   content::WebUI* web_ui = NULL;
     25   // Use the committed entry so the bookmarks bar disappears at the same time
     26   // the page does.
     27   if (web_contents->GetController().GetLastCommittedEntry())
     28     web_ui = web_contents->GetCommittedWebUI();
     29   else
     30     web_ui = web_contents->GetWebUI();
     31   return web_ui && NewTabUI::FromWebUIController(web_ui->GetController());
     32 }
     33 
     34 bool IsInstantNTP(content::WebContents* web_contents) {
     35   // Use the committed entry so the bookmarks bar disappears at the same time
     36   // the page does.
     37   const content::NavigationEntry* entry =
     38       web_contents->GetController().GetLastCommittedEntry();
     39   if (!entry)
     40     entry = web_contents->GetController().GetVisibleEntry();
     41   return chrome::NavEntryIsInstantNTP(web_contents, entry);
     42 }
     43 
     44 }  // namespace
     45 
     46 DEFINE_WEB_CONTENTS_USER_DATA_KEY(BookmarkTabHelper);
     47 
     48 BookmarkTabHelper::~BookmarkTabHelper() {
     49   if (bookmark_model_)
     50     bookmark_model_->RemoveObserver(this);
     51 }
     52 
     53 bool BookmarkTabHelper::ShouldShowBookmarkBar() const {
     54   if (web_contents()->ShowingInterstitialPage())
     55     return false;
     56 
     57   if (chrome::SadTab::ShouldShow(web_contents()->GetCrashedStatus()))
     58     return false;
     59 
     60   if (!browser_defaults::bookmarks_enabled)
     61     return false;
     62 
     63   Profile* profile =
     64       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
     65   PrefService* prefs = profile->GetPrefs();
     66   if (prefs->IsManagedPreference(prefs::kShowBookmarkBar) &&
     67       !prefs->GetBoolean(prefs::kShowBookmarkBar))
     68     return false;
     69 
     70   return IsNTPWebUI(web_contents()) || IsInstantNTP(web_contents());
     71 }
     72 
     73 BookmarkTabHelper::BookmarkTabHelper(content::WebContents* web_contents)
     74     : content::WebContentsObserver(web_contents),
     75       is_starred_(false),
     76       bookmark_model_(NULL),
     77       delegate_(NULL),
     78       bookmark_drag_(NULL) {
     79   Profile* profile =
     80       Profile::FromBrowserContext(web_contents->GetBrowserContext());
     81   bookmark_model_= BookmarkModelFactory::GetForProfile(profile);
     82   if (bookmark_model_)
     83     bookmark_model_->AddObserver(this);
     84 }
     85 
     86 void BookmarkTabHelper::UpdateStarredStateForCurrentURL() {
     87   const bool old_state = is_starred_;
     88   is_starred_ = (bookmark_model_ &&
     89       bookmark_model_->IsBookmarked(chrome::GetURLToBookmark(web_contents())));
     90 
     91   if (is_starred_ != old_state && delegate_)
     92     delegate_->URLStarredChanged(web_contents(), is_starred_);
     93 }
     94 
     95 void BookmarkTabHelper::BookmarkModelChanged() {
     96 }
     97 
     98 void BookmarkTabHelper::Loaded(BookmarkModel* model, bool ids_reassigned) {
     99   UpdateStarredStateForCurrentURL();
    100 }
    101 
    102 void BookmarkTabHelper::BookmarkNodeAdded(BookmarkModel* model,
    103                                           const BookmarkNode* parent,
    104                                           int index) {
    105   UpdateStarredStateForCurrentURL();
    106 }
    107 
    108 void BookmarkTabHelper::BookmarkNodeRemoved(BookmarkModel* model,
    109                                             const BookmarkNode* parent,
    110                                             int old_index,
    111                                             const BookmarkNode* node) {
    112   UpdateStarredStateForCurrentURL();
    113 }
    114 
    115 void BookmarkTabHelper::BookmarkAllNodesRemoved(BookmarkModel* model) {
    116   UpdateStarredStateForCurrentURL();
    117 }
    118 
    119 void BookmarkTabHelper::BookmarkNodeChanged(BookmarkModel* model,
    120                                             const BookmarkNode* node) {
    121   UpdateStarredStateForCurrentURL();
    122 }
    123 
    124 void BookmarkTabHelper::DidNavigateMainFrame(
    125     const content::LoadCommittedDetails& /*details*/,
    126     const content::FrameNavigateParams& /*params*/) {
    127   UpdateStarredStateForCurrentURL();
    128 }
    129