chrome/browser/ui/search_engines/template_url_table_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/ui/search_engines/template_url_table_model.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/i18n/rtl.h"
  10 #include "base/stl_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/task/cancelable_task_tracker.h"
  13 #include "chrome/browser/favicon/favicon_service.h"
  14 #include "chrome/browser/favicon/favicon_service_factory.h"
  15 #include "chrome/browser/profiles/profile.h"
  16 #include "chrome/browser/search_engines/template_url.h"
  17 #include "chrome/browser/search_engines/template_url_service.h"
  18 #include "chrome/common/favicon/favicon_types.h"
  19 #include "grit/generated_resources.h"
  20 #include "grit/ui_resources.h"
  21 #include "third_party/skia/include/core/SkBitmap.h"
  22 #include "ui/base/l10n/l10n_util.h"
  23 #include "ui/base/models/table_model_observer.h"
  24 #include "ui/base/resource/resource_bundle.h"
  25 #include "ui/gfx/favicon_size.h"
  26 #include "ui/gfx/image/image_skia.h"
  27
  28 // Group IDs used by TemplateURLTableModel.
  29 static const int kMainGroupID = 0;
  30 static const int kOtherGroupID = 1;
  31 static const int kExtensionGroupID = 2;
  32
  33 // ModelEntry ----------------------------------------------------
  34
  35 // ModelEntry wraps a TemplateURL as returned from the TemplateURL.
  36 // ModelEntry also tracks state information about the URL.
  37
  38 // Icon used while loading, or if a specific favicon can't be found.
  39 static gfx::ImageSkia* default_icon = NULL;
  40
  41 class ModelEntry {
  42  public:
  43   ModelEntry(TemplateURLTableModel* model, TemplateURL* template_url)
  44       : template_url_(template_url),
  45         load_state_(NOT_LOADED),
  46         model_(model) {
  47     if (!default_icon) {
  48       default_icon = ResourceBundle::GetSharedInstance().
  49           GetImageSkiaNamed(IDR_DEFAULT_FAVICON);
  50     }
  51   }
  52
  53   TemplateURL* template_url() {
  54     return template_url_;
  55   }
  56
  57   gfx::ImageSkia GetIcon() {
  58     if (load_state_ == NOT_LOADED)
  59       LoadFavicon();
  60     if (!favicon_.isNull())
  61       return favicon_;
  62     return *default_icon;
  63   }
  64
  65   // Resets internal status so that the next time the icon is asked for its
  66   // fetched again. This should be invoked if the url is modified.
  67   void ResetIcon() {
  68     load_state_ = NOT_LOADED;
  69     favicon_ = gfx::ImageSkia();
  70   }
  71
  72  private:
  73   // State of the favicon.
  74   enum LoadState {
  75     NOT_LOADED,
  76     LOADING,
  77     LOADED
  78   };
  79
  80   void LoadFavicon() {
  81     load_state_ = LOADED;
  82     FaviconService* favicon_service = FaviconServiceFactory::GetForProfile(
  83         model_->template_url_service()->profile(), Profile::EXPLICIT_ACCESS);
  84     if (!favicon_service)
  85       return;
  86     GURL favicon_url = template_url()->favicon_url();
  87     if (!favicon_url.is_valid()) {
  88       // The favicon url isn't always set. Guess at one here.
  89       if (template_url_->url_ref().IsValid()) {
  90         GURL url(template_url_->url());
  91         if (url.is_valid())
  92           favicon_url = TemplateURL::GenerateFaviconURL(url);
  93       }
  94       if (!favicon_url.is_valid())
  95         return;
  96     }
  97     load_state_ = LOADING;
  98     favicon_service->GetFaviconImage(
  99         favicon_url, chrome::FAVICON, gfx::kFaviconSize,
 100         base::Bind(&ModelEntry::OnFaviconDataAvailable,
 101                    base::Unretained(this)),
 102         &tracker_);
 103   }
 104
 105   void OnFaviconDataAvailable(const chrome::FaviconImageResult& image_result) {
 106     load_state_ = LOADED;
 107     if (!image_result.image.IsEmpty()) {
 108       favicon_ = image_result.image.AsImageSkia();
 109       model_->FaviconAvailable(this);
 110     }
 111   }
 112
 113   TemplateURL* template_url_;
 114   gfx::ImageSkia favicon_;
 115   LoadState load_state_;
 116   TemplateURLTableModel* model_;
 117   base::CancelableTaskTracker tracker_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(ModelEntry);
 120 };
 121
 122 // TemplateURLTableModel -----------------------------------------
 123
 124 TemplateURLTableModel::TemplateURLTableModel(
 125     TemplateURLService* template_url_service)
 126     : observer_(NULL),
 127       template_url_service_(template_url_service) {
 128   DCHECK(template_url_service);
 129   template_url_service_->Load();
 130   template_url_service_->AddObserver(this);
 131   Reload();
 132 }
 133
 134 TemplateURLTableModel::~TemplateURLTableModel() {
 135   template_url_service_->RemoveObserver(this);
 136   STLDeleteElements(&entries_);
 137   entries_.clear();
 138 }
 139
 140 void TemplateURLTableModel::Reload() {
 141   STLDeleteElements(&entries_);
 142   entries_.clear();
 143
 144   TemplateURLService::TemplateURLVector urls =
 145       template_url_service_->GetTemplateURLs();
 146
 147   std::vector<ModelEntry*> default_entries, other_entries, extension_entries;
 148   // Keywords that can be made the default first.
 149   for (TemplateURLService::TemplateURLVector::iterator i = urls.begin();
 150        i != urls.end(); ++i) {
 151     TemplateURL* template_url = *i;
 152     // NOTE: we don't use ShowInDefaultList here to avoid items bouncing around
 153     // the lists while editing.
 154     if (template_url->show_in_default_list())
 155       default_entries.push_back(new ModelEntry(this, template_url));
 156     else if (template_url->GetType() == TemplateURL::OMNIBOX_API_EXTENSION)
 157       extension_entries.push_back(new ModelEntry(this, template_url));
 158     else
 159       other_entries.push_back(new ModelEntry(this, template_url));
 160   }
 161
 162   last_search_engine_index_ = static_cast<int>(default_entries.size());
 163   last_other_engine_index_ = last_search_engine_index_ +
 164       static_cast<int>(other_entries.size());
 165
 166   entries_.insert(entries_.end(),
 167                   default_entries.begin(),
 168                   default_entries.end());
 169
 170   entries_.insert(entries_.end(),
 171                   other_entries.begin(),
 172                   other_entries.end());
 173
 174   entries_.insert(entries_.end(),
 175                   extension_entries.begin(),
 176                   extension_entries.end());
 177
 178   if (observer_)
 179     observer_->OnModelChanged();
 180 }
 181
 182 int TemplateURLTableModel::RowCount() {
 183   return static_cast<int>(entries_.size());
 184 }
 185
 186 base::string16 TemplateURLTableModel::GetText(int row, int col_id) {
 187   DCHECK(row >= 0 && row < RowCount());
 188   const TemplateURL* url = entries_[row]->template_url();
 189   if (col_id == IDS_SEARCH_ENGINES_EDITOR_DESCRIPTION_COLUMN) {
 190     base::string16 url_short_name = url->short_name();
 191     // TODO(xji): Consider adding a special case if the short name is a URL,
 192     // since those should always be displayed LTR. Please refer to
 193     // http://crbug.com/6726 for more information.
 194     base::i18n::AdjustStringForLocaleDirection(&url_short_name);
 195     return (template_url_service_->GetDefaultSearchProvider() == url) ?
 196         l10n_util::GetStringFUTF16(IDS_SEARCH_ENGINES_EDITOR_DEFAULT_ENGINE,
 197                                    url_short_name) : url_short_name;
 198   }
 199
 200   DCHECK_EQ(IDS_SEARCH_ENGINES_EDITOR_KEYWORD_COLUMN, col_id);
 201   // Keyword should be domain name. Force it to have LTR directionality.
 202   return base::i18n::GetDisplayStringInLTRDirectionality(url->keyword());
 203 }
 204
 205 gfx::ImageSkia TemplateURLTableModel::GetIcon(int row) {
 206   DCHECK(row >= 0 && row < RowCount());
 207   return entries_[row]->GetIcon();
 208 }
 209
 210 void TemplateURLTableModel::SetObserver(ui::TableModelObserver* observer) {
 211   observer_ = observer;
 212 }
 213
 214 bool TemplateURLTableModel::HasGroups() {
 215   return true;
 216 }
 217
 218 TemplateURLTableModel::Groups TemplateURLTableModel::GetGroups() {
 219   Groups groups;
 220
 221   Group search_engine_group;
 222   search_engine_group.title =
 223       l10n_util::GetStringUTF16(IDS_SEARCH_ENGINES_EDITOR_MAIN_SEPARATOR);
 224   search_engine_group.id = kMainGroupID;
 225   groups.push_back(search_engine_group);
 226
 227   Group other_group;
 228   other_group.title =
 229       l10n_util::GetStringUTF16(IDS_SEARCH_ENGINES_EDITOR_OTHER_SEPARATOR);
 230   other_group.id = kOtherGroupID;
 231   groups.push_back(other_group);
 232
 233   Group extension_group;
 234   extension_group.title =
 235       l10n_util::GetStringUTF16(IDS_SEARCH_ENGINES_EDITOR_EXTENSIONS_SEPARATOR);
 236   extension_group.id = kExtensionGroupID;
 237   groups.push_back(extension_group);
 238
 239   return groups;
 240 }
 241
 242 int TemplateURLTableModel::GetGroupID(int row) {
 243   DCHECK(row >= 0 && row < RowCount());
 244   if (row < last_search_engine_index_)
 245     return kMainGroupID;
 246   return row < last_other_engine_index_ ? kOtherGroupID : kExtensionGroupID;
 247 }
 248
 249 void TemplateURLTableModel::Remove(int index) {
 250   // Remove the observer while we modify the model, that way we don't need to
 251   // worry about the model calling us back when we mutate it.
 252   template_url_service_->RemoveObserver(this);
 253   TemplateURL* template_url = GetTemplateURL(index);
 254
 255   scoped_ptr<ModelEntry> entry(RemoveEntry(index));
 256
 257   // Make sure to remove from the table model first, otherwise the
 258   // TemplateURL would be freed.
 259   template_url_service_->Remove(template_url);
 260   template_url_service_->AddObserver(this);
 261 }
 262
 263 void TemplateURLTableModel::Add(int index,
 264                                 const base::string16& short_name,
 265                                 const base::string16& keyword,
 266                                 const std::string& url) {
 267   DCHECK(index >= 0 && index <= RowCount());
 268   DCHECK(!url.empty());
 269   template_url_service_->RemoveObserver(this);
 270   TemplateURLData data;
 271   data.short_name = short_name;
 272   data.SetKeyword(keyword);
 273   data.SetURL(url);
 274   TemplateURL* turl = new TemplateURL(template_url_service_->profile(), data);
 275   template_url_service_->Add(turl);
 276   scoped_ptr<ModelEntry> entry(new ModelEntry(this, turl));
 277   template_url_service_->AddObserver(this);
 278   AddEntry(index, entry.Pass());
 279 }
 280
 281 void TemplateURLTableModel::ModifyTemplateURL(int index,
 282                                               const base::string16& title,
 283                                               const base::string16& keyword,
 284                                               const std::string& url) {
 285   DCHECK(index >= 0 && index <= RowCount());
 286   DCHECK(!url.empty());
 287   TemplateURL* template_url = GetTemplateURL(index);
 288   // The default search provider should support replacement.
 289   DCHECK(template_url_service_->GetDefaultSearchProvider() != template_url ||
 290          template_url->SupportsReplacement());
 291   template_url_service_->RemoveObserver(this);
 292   template_url_service_->ResetTemplateURL(template_url, title, keyword, url);
 293   template_url_service_->AddObserver(this);
 294   ReloadIcon(index);  // Also calls NotifyChanged().
 295 }
 296
 297 void TemplateURLTableModel::ReloadIcon(int index) {
 298   DCHECK(index >= 0 && index < RowCount());
 299
 300   entries_[index]->ResetIcon();
 301
 302   NotifyChanged(index);
 303 }
 304
 305 TemplateURL* TemplateURLTableModel::GetTemplateURL(int index) {
 306   return entries_[index]->template_url();
 307 }
 308
 309 int TemplateURLTableModel::IndexOfTemplateURL(
 310     const TemplateURL* template_url) {
 311   for (std::vector<ModelEntry*>::iterator i = entries_.begin();
 312        i != entries_.end(); ++i) {
 313     ModelEntry* entry = *i;
 314     if (entry->template_url() == template_url)
 315       return static_cast<int>(i - entries_.begin());
 316   }
 317   return -1;
 318 }
 319
 320 int TemplateURLTableModel::MoveToMainGroup(int index) {
 321   if (index < last_search_engine_index_)
 322     return index;  // Already in the main group.
 323
 324   scoped_ptr<ModelEntry> current_entry(RemoveEntry(index));
 325   const int new_index = last_search_engine_index_++;
 326   AddEntry(new_index, current_entry.Pass());
 327   return new_index;
 328 }
 329
 330 int TemplateURLTableModel::MakeDefaultTemplateURL(int index) {
 331   if (index < 0 || index >= RowCount()) {
 332     NOTREACHED();
 333     return -1;
 334   }
 335
 336   TemplateURL* keyword = GetTemplateURL(index);
 337   const TemplateURL* current_default =
 338       template_url_service_->GetDefaultSearchProvider();
 339   if (current_default == keyword)
 340     return -1;
 341
 342   template_url_service_->RemoveObserver(this);
 343   template_url_service_->SetDefaultSearchProvider(keyword);
 344   template_url_service_->AddObserver(this);
 345
 346   // The formatting of the default engine is different; notify the table that
 347   // both old and new entries have changed.
 348   if (current_default != NULL) {
 349     int old_index = IndexOfTemplateURL(current_default);
 350     // current_default may not be in the list of TemplateURLs if the database is
 351     // corrupt and the default TemplateURL is used from preferences
 352     if (old_index >= 0)
 353       NotifyChanged(old_index);
 354   }
 355   const int new_index = IndexOfTemplateURL(keyword);
 356   NotifyChanged(new_index);
 357
 358   // Make sure the new default is in the main group.
 359   return MoveToMainGroup(index);
 360 }
 361
 362 void TemplateURLTableModel::NotifyChanged(int index) {
 363   if (observer_) {
 364     DCHECK_GE(index, 0);
 365     observer_->OnItemsChanged(index, 1);
 366   }
 367 }
 368
 369 void TemplateURLTableModel::FaviconAvailable(ModelEntry* entry) {
 370   std::vector<ModelEntry*>::iterator i =
 371       std::find(entries_.begin(), entries_.end(), entry);
 372   DCHECK(i != entries_.end());
 373   NotifyChanged(static_cast<int>(i - entries_.begin()));
 374 }
 375
 376 void TemplateURLTableModel::OnTemplateURLServiceChanged() {
 377   Reload();
 378 }
 379
 380 scoped_ptr<ModelEntry> TemplateURLTableModel::RemoveEntry(int index) {
 381   scoped_ptr<ModelEntry> entry(entries_[index]);
 382   entries_.erase(index + entries_.begin());
 383   if (index < last_search_engine_index_)
 384     --last_search_engine_index_;
 385   if (index < last_other_engine_index_)
 386     --last_other_engine_index_;
 387   if (observer_)
 388     observer_->OnItemsRemoved(index, 1);
 389   return entry.Pass();
 390 }
 391
 392 void TemplateURLTableModel::AddEntry(int index, scoped_ptr<ModelEntry> entry) {
 393   entries_.insert(entries_.begin() + index, entry.release());
 394   if (index <= last_other_engine_index_)
 395     ++last_other_engine_index_;
 396   if (observer_)
 397     observer_->OnItemsAdded(index, 1);
 398 }