chrome/browser/extensions/extension_toolbar_model.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/extensions/extension_toolbar_model.h"
   6
   7 #include <string>
   8
   9 #include "base/prefs/pref_service.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "chrome/browser/extensions/api/extension_action/extension_action_api.h"
  12 #include "chrome/browser/extensions/extension_action.h"
  13 #include "chrome/browser/extensions/extension_action_manager.h"
  14 #include "chrome/browser/extensions/extension_prefs.h"
  15 #include "chrome/browser/extensions/extension_service.h"
  16 #include "chrome/browser/extensions/extension_tab_util.h"
  17 #include "chrome/browser/extensions/extension_util.h"
  18 #include "chrome/browser/extensions/tab_helper.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/ui/browser.h"
  21 #include "chrome/browser/ui/tabs/tab_strip_model.h"
  22 #include "chrome/common/extensions/extension.h"
  23 #include "chrome/common/extensions/feature_switch.h"
  24 #include "chrome/common/pref_names.h"
  25 #include "content/public/browser/notification_details.h"
  26 #include "content/public/browser/notification_source.h"
  27 #include "content/public/browser/web_contents.h"
  28
  29 using extensions::Extension;
  30 using extensions::ExtensionIdList;
  31 using extensions::ExtensionList;
  32
  33 namespace {
  34
  35 // Returns true if an |extension| is in an |extension_list|.
  36 bool IsInExtensionList(const Extension* extension,
  37                        const extensions::ExtensionList& extension_list) {
  38   for (size_t i = 0; i < extension_list.size(); i++) {
  39     if (extension_list[i].get() == extension)
  40       return true;
  41   }
  42   return false;
  43 }
  44
  45 }  // namespace
  46
  47 bool ExtensionToolbarModel::Observer::BrowserActionShowPopup(
  48     const extensions::Extension* extension) {
  49   return false;
  50 }
  51
  52 ExtensionToolbarModel::ExtensionToolbarModel(ExtensionService* service)
  53     : service_(service),
  54       prefs_(service->profile()->GetPrefs()),
  55       extensions_initialized_(false),
  56       weak_ptr_factory_(this) {
  57   DCHECK(service_);
  58
  59   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
  60                  content::Source<Profile>(service_->profile()));
  61   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
  62                  content::Source<Profile>(service_->profile()));
  63   registrar_.Add(this, chrome::NOTIFICATION_EXTENSIONS_READY,
  64                  content::Source<Profile>(service_->profile()));
  65   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
  66                  content::Source<Profile>(service_->profile()));
  67   registrar_.Add(
  68       this, chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_VISIBILITY_CHANGED,
  69       content::Source<extensions::ExtensionPrefs>(service_->extension_prefs()));
  70
  71   visible_icon_count_ = prefs_->GetInteger(prefs::kExtensionToolbarSize);
  72
  73   pref_change_registrar_.Init(prefs_);
  74   pref_change_callback_ =
  75       base::Bind(&ExtensionToolbarModel::OnExtensionToolbarPrefChange,
  76                  base::Unretained(this));
  77   pref_change_registrar_.Add(prefs::kExtensionToolbar, pref_change_callback_);
  78 }
  79
  80 ExtensionToolbarModel::~ExtensionToolbarModel() {
  81 }
  82
  83 void ExtensionToolbarModel::AddObserver(Observer* observer) {
  84   observers_.AddObserver(observer);
  85 }
  86
  87 void ExtensionToolbarModel::RemoveObserver(Observer* observer) {
  88   observers_.RemoveObserver(observer);
  89 }
  90
  91 void ExtensionToolbarModel::MoveBrowserAction(const Extension* extension,
  92                                               int index) {
  93   ExtensionList::iterator pos = std::find(toolbar_items_.begin(),
  94       toolbar_items_.end(), extension);
  95   if (pos == toolbar_items_.end()) {
  96     NOTREACHED();
  97     return;
  98   }
  99   toolbar_items_.erase(pos);
 100
 101   ExtensionIdList::iterator pos_id;
 102   pos_id = std::find(last_known_positions_.begin(),
 103                      last_known_positions_.end(), extension->id());
 104   if (pos_id != last_known_positions_.end())
 105     last_known_positions_.erase(pos_id);
 106
 107   int i = 0;
 108   bool inserted = false;
 109   for (ExtensionList::iterator iter = toolbar_items_.begin();
 110        iter != toolbar_items_.end();
 111        ++iter, ++i) {
 112     if (i == index) {
 113       pos_id = std::find(last_known_positions_.begin(),
 114                          last_known_positions_.end(), (*iter)->id());
 115       last_known_positions_.insert(pos_id, extension->id());
 116
 117       toolbar_items_.insert(iter, make_scoped_refptr(extension));
 118       inserted = true;
 119       break;
 120     }
 121   }
 122
 123   if (!inserted) {
 124     DCHECK_EQ(index, static_cast<int>(toolbar_items_.size()));
 125     index = toolbar_items_.size();
 126
 127     toolbar_items_.push_back(make_scoped_refptr(extension));
 128     last_known_positions_.push_back(extension->id());
 129   }
 130
 131   FOR_EACH_OBSERVER(Observer, observers_, BrowserActionMoved(extension, index));
 132
 133   UpdatePrefs();
 134 }
 135
 136 ExtensionToolbarModel::Action ExtensionToolbarModel::ExecuteBrowserAction(
 137     const Extension* extension,
 138     Browser* browser,
 139     GURL* popup_url_out,
 140     bool should_grant) {
 141   content::WebContents* web_contents = NULL;
 142   int tab_id = 0;
 143   if (!ExtensionTabUtil::GetDefaultTab(browser, &web_contents, &tab_id))
 144     return ACTION_NONE;
 145
 146   ExtensionAction* browser_action =
 147       extensions::ExtensionActionManager::Get(service_->profile())->
 148       GetBrowserAction(*extension);
 149
 150   // For browser actions, visibility == enabledness.
 151   if (!browser_action->GetIsVisible(tab_id))
 152     return ACTION_NONE;
 153
 154   if (should_grant) {
 155     extensions::TabHelper::FromWebContents(web_contents)->
 156         active_tab_permission_granter()->GrantIfRequested(extension);
 157   }
 158
 159   if (browser_action->HasPopup(tab_id)) {
 160     if (popup_url_out)
 161       *popup_url_out = browser_action->GetPopupUrl(tab_id);
 162     return ACTION_SHOW_POPUP;
 163   }
 164
 165   extensions::ExtensionActionAPI::BrowserActionExecuted(
 166       service_->profile(), *browser_action, web_contents);
 167   return ACTION_NONE;
 168 }
 169
 170 void ExtensionToolbarModel::SetVisibleIconCount(int count) {
 171   visible_icon_count_ =
 172       count == static_cast<int>(toolbar_items_.size()) ? -1 : count;
 173   prefs_->SetInteger(prefs::kExtensionToolbarSize, visible_icon_count_);
 174 }
 175
 176 void ExtensionToolbarModel::Observe(
 177     int type,
 178     const content::NotificationSource& source,
 179     const content::NotificationDetails& details) {
 180   if (type == chrome::NOTIFICATION_EXTENSIONS_READY) {
 181     InitializeExtensionList();
 182     return;
 183   }
 184
 185   if (!service_->is_ready())
 186     return;
 187
 188   const Extension* extension = NULL;
 189   if (type == chrome::NOTIFICATION_EXTENSION_UNLOADED) {
 190     extension = content::Details<extensions::UnloadedExtensionInfo>(
 191         details)->extension;
 192   } else if (type ==
 193       chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_VISIBILITY_CHANGED) {
 194     extension = service_->GetExtensionById(
 195         *content::Details<const std::string>(details).ptr(), true);
 196   } else {
 197     extension = content::Details<const Extension>(details).ptr();
 198   }
 199   if (type == chrome::NOTIFICATION_EXTENSION_LOADED) {
 200     // We don't want to add the same extension twice. It may have already been
 201     // added by EXTENSION_BROWSER_ACTION_VISIBILITY_CHANGED below, if the user
 202     // hides the browser action and then disables and enables the extension.
 203     for (size_t i = 0; i < toolbar_items_.size(); i++) {
 204       if (toolbar_items_[i].get() == extension)
 205         return;  // Already exists.
 206     }
 207     if (extensions::ExtensionActionAPI::GetBrowserActionVisibility(
 208             service_->extension_prefs(), extension->id())) {
 209       AddExtension(extension);
 210     }
 211   } else if (type == chrome::NOTIFICATION_EXTENSION_UNLOADED) {
 212     RemoveExtension(extension);
 213   } else if (type == chrome::NOTIFICATION_EXTENSION_UNINSTALLED) {
 214     UninstalledExtension(extension);
 215   } else if (type ==
 216       chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_VISIBILITY_CHANGED) {
 217     if (extensions::ExtensionActionAPI::GetBrowserActionVisibility(
 218             service_->extension_prefs(), extension->id())) {
 219       AddExtension(extension);
 220     } else {
 221       RemoveExtension(extension);
 222     }
 223   } else {
 224     NOTREACHED() << "Received unexpected notification";
 225   }
 226 }
 227
 228 size_t ExtensionToolbarModel::FindNewPositionFromLastKnownGood(
 229     const Extension* extension) {
 230   // See if we have last known good position for this extension.
 231   size_t new_index = 0;
 232   // Loop through the ID list of known positions, to count the number of visible
 233   // browser action icons preceding |extension|.
 234   for (ExtensionIdList::const_iterator iter_id = last_known_positions_.begin();
 235        iter_id < last_known_positions_.end(); ++iter_id) {
 236     if ((*iter_id) == extension->id())
 237       return new_index;  // We've found the right position.
 238     // Found an id, need to see if it is visible.
 239     for (ExtensionList::const_iterator iter_ext = toolbar_items_.begin();
 240          iter_ext < toolbar_items_.end(); ++iter_ext) {
 241       if ((*iter_ext)->id().compare(*iter_id) == 0) {
 242         // This extension is visible, update the index value.
 243         ++new_index;
 244         break;
 245       }
 246     }
 247   }
 248
 249   return -1;
 250 }
 251
 252 void ExtensionToolbarModel::AddExtension(const Extension* extension) {
 253   // We only care about extensions with browser actions.
 254   if (!extensions::ExtensionActionManager::Get(service_->profile())->
 255       GetBrowserAction(*extension)) {
 256     return;
 257   }
 258
 259   size_t new_index = -1;
 260
 261   // See if we have a last known good position for this extension.
 262   ExtensionIdList::iterator last_pos = std::find(last_known_positions_.begin(),
 263                                                  last_known_positions_.end(),
 264                                                  extension->id());
 265   if (last_pos != last_known_positions_.end()) {
 266     new_index = FindNewPositionFromLastKnownGood(extension);
 267     if (new_index != toolbar_items_.size()) {
 268       toolbar_items_.insert(toolbar_items_.begin() + new_index,
 269                             make_scoped_refptr(extension));
 270     } else {
 271       toolbar_items_.push_back(make_scoped_refptr(extension));
 272     }
 273   } else {
 274     // This is a never before seen extension, that was added to the end. Make
 275     // sure to reflect that.
 276     toolbar_items_.push_back(make_scoped_refptr(extension));
 277     last_known_positions_.push_back(extension->id());
 278     new_index = toolbar_items_.size() - 1;
 279     UpdatePrefs();
 280   }
 281
 282   FOR_EACH_OBSERVER(Observer, observers_,
 283                     BrowserActionAdded(extension, new_index));
 284 }
 285
 286 void ExtensionToolbarModel::RemoveExtension(const Extension* extension) {
 287   ExtensionList::iterator pos =
 288       std::find(toolbar_items_.begin(), toolbar_items_.end(), extension);
 289   if (pos == toolbar_items_.end())
 290     return;
 291
 292   toolbar_items_.erase(pos);
 293   FOR_EACH_OBSERVER(Observer, observers_,
 294                     BrowserActionRemoved(extension));
 295
 296   UpdatePrefs();
 297 }
 298
 299 void ExtensionToolbarModel::UninstalledExtension(const Extension* extension) {
 300   // Remove the extension id from the ordered list, if it exists (the extension
 301   // might not be represented in the list because it might not have an icon).
 302   ExtensionIdList::iterator pos =
 303       std::find(last_known_positions_.begin(),
 304                 last_known_positions_.end(), extension->id());
 305
 306   if (pos != last_known_positions_.end()) {
 307     last_known_positions_.erase(pos);
 308     UpdatePrefs();
 309   }
 310 }
 311
 312 // Combine the currently enabled extensions that have browser actions (which
 313 // we get from the ExtensionService) with the ordering we get from the
 314 // pref service. For robustness we use a somewhat inefficient process:
 315 // 1. Create a vector of extensions sorted by their pref values. This vector may
 316 // have holes.
 317 // 2. Create a vector of extensions that did not have a pref value.
 318 // 3. Remove holes from the sorted vector and append the unsorted vector.
 319 void ExtensionToolbarModel::InitializeExtensionList() {
 320   DCHECK(service_->is_ready());
 321
 322   last_known_positions_ = service_->extension_prefs()->GetToolbarOrder();
 323   Populate(last_known_positions_);
 324
 325   extensions_initialized_ = true;
 326   FOR_EACH_OBSERVER(Observer, observers_, ModelLoaded());
 327 }
 328
 329 void ExtensionToolbarModel::Populate(
 330     const extensions::ExtensionIdList& positions) {
 331   // Items that have explicit positions.
 332   ExtensionList sorted;
 333   sorted.resize(positions.size(), NULL);
 334   // The items that don't have explicit positions.
 335   ExtensionList unsorted;
 336
 337   extensions::ExtensionActionManager* extension_action_manager =
 338       extensions::ExtensionActionManager::Get(service_->profile());
 339
 340   // Create the lists.
 341   for (ExtensionSet::const_iterator it = service_->extensions()->begin();
 342        it != service_->extensions()->end(); ++it) {
 343     const Extension* extension = it->get();
 344     if (!extension_action_manager->GetBrowserAction(*extension))
 345       continue;
 346     if (!extensions::ExtensionActionAPI::GetBrowserActionVisibility(
 347             service_->extension_prefs(), extension->id())) {
 348       continue;
 349     }
 350
 351     extensions::ExtensionIdList::const_iterator pos =
 352         std::find(positions.begin(), positions.end(), extension->id());
 353     if (pos != positions.end())
 354       sorted[pos - positions.begin()] = extension;
 355     else
 356       unsorted.push_back(make_scoped_refptr(extension));
 357   }
 358
 359   // Erase current icons.
 360   for (size_t i = 0; i < toolbar_items_.size(); i++) {
 361     FOR_EACH_OBSERVER(
 362         Observer, observers_, BrowserActionRemoved(toolbar_items_[i].get()));
 363   }
 364   toolbar_items_.clear();
 365
 366   // Merge the lists.
 367   toolbar_items_.reserve(sorted.size() + unsorted.size());
 368   for (ExtensionList::const_iterator iter = sorted.begin();
 369        iter != sorted.end(); ++iter) {
 370     // It's possible for the extension order to contain items that aren't
 371     // actually loaded on this machine.  For example, when extension sync is on,
 372     // we sync the extension order as-is but double-check with the user before
 373     // syncing NPAPI-containing extensions, so if one of those is not actually
 374     // synced, we'll get a NULL in the list.  This sort of case can also happen
 375     // if some error prevents an extension from loading.
 376     if (iter->get() != NULL)
 377       toolbar_items_.push_back(*iter);
 378   }
 379   toolbar_items_.insert(toolbar_items_.end(), unsorted.begin(),
 380                         unsorted.end());
 381
 382   // Inform observers.
 383   for (size_t i = 0; i < toolbar_items_.size(); i++) {
 384     FOR_EACH_OBSERVER(
 385         Observer, observers_, BrowserActionAdded(toolbar_items_[i].get(), i));
 386   }
 387 }
 388
 389 void ExtensionToolbarModel::FillExtensionList(
 390     const extensions::ExtensionIdList& order) {
 391   toolbar_items_.clear();
 392   toolbar_items_.reserve(order.size());
 393   for (size_t i = 0; i < order.size(); ++i) {
 394     const extensions::Extension* extension =
 395         service_->GetExtensionById(order[i], false);
 396     if (extension)
 397       AddExtension(extension);
 398   }
 399 }
 400
 401 void ExtensionToolbarModel::UpdatePrefs() {
 402   if (!service_->extension_prefs())
 403     return;
 404
 405   // Don't observe change caused by self.
 406   pref_change_registrar_.Remove(prefs::kExtensionToolbar);
 407   service_->extension_prefs()->SetToolbarOrder(last_known_positions_);
 408   pref_change_registrar_.Add(prefs::kExtensionToolbar, pref_change_callback_);
 409 }
 410
 411 int ExtensionToolbarModel::IncognitoIndexToOriginal(int incognito_index) {
 412   int original_index = 0, i = 0;
 413   for (ExtensionList::iterator iter = toolbar_items_.begin();
 414        iter != toolbar_items_.end();
 415        ++iter, ++original_index) {
 416     if (extension_util::IsIncognitoEnabled((*iter)->id(), service_)) {
 417       if (incognito_index == i)
 418         break;
 419       ++i;
 420     }
 421   }
 422   return original_index;
 423 }
 424
 425 int ExtensionToolbarModel::OriginalIndexToIncognito(int original_index) {
 426   int incognito_index = 0, i = 0;
 427   for (ExtensionList::iterator iter = toolbar_items_.begin();
 428        iter != toolbar_items_.end();
 429        ++iter, ++i) {
 430     if (original_index == i)
 431       break;
 432     if (extension_util::IsIncognitoEnabled((*iter)->id(), service_))
 433       ++incognito_index;
 434   }
 435   return incognito_index;
 436 }
 437
 438 void ExtensionToolbarModel::OnExtensionToolbarPrefChange() {
 439   // If extensions are not ready, defer to later Populate() call.
 440   if (!extensions_initialized_)
 441     return;
 442
 443   // Recalculate |last_known_positions_| to be |pref_positions| followed by
 444   // ones that are only in |last_known_positions_|.
 445   extensions::ExtensionIdList pref_positions =
 446       service_->extension_prefs()->GetToolbarOrder();
 447   size_t pref_position_size = pref_positions.size();
 448   for (size_t i = 0; i < last_known_positions_.size(); ++i) {
 449     if (std::find(pref_positions.begin(), pref_positions.end(),
 450                   last_known_positions_[i]) == pref_positions.end()) {
 451       pref_positions.push_back(last_known_positions_[i]);
 452     }
 453   }
 454   last_known_positions_.swap(pref_positions);
 455
 456   // Re-populate.
 457   Populate(last_known_positions_);
 458
 459   if (last_known_positions_.size() > pref_position_size) {
 460     // Need to update pref because we have extra icons. But can't call
 461     // UpdatePrefs() directly within observation closure.
 462     base::MessageLoop::current()->PostTask(
 463         FROM_HERE,
 464         base::Bind(&ExtensionToolbarModel::UpdatePrefs,
 465                    weak_ptr_factory_.GetWeakPtr()));
 466   }
 467 }
 468
 469 bool ExtensionToolbarModel::ShowBrowserActionPopup(
 470     const extensions::Extension* extension) {
 471   ObserverListBase<Observer>::Iterator it(observers_);
 472   Observer* obs = NULL;
 473   while ((obs = it.GetNext()) != NULL) {
 474     // Stop after first popup since it should only show in the active window.
 475     if (obs->BrowserActionShowPopup(extension))
 476       return true;
 477   }
 478   return false;
 479 }