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| 1 // Copyright 2015 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 package org.chromium.chrome.browser.tabmodel; |
| 6 |
| 7 import android.content.Context; |
| 8 import android.os.Handler; |
| 9 |
| 10 import org.chromium.base.metrics.RecordHistogram; |
| 11 import org.chromium.chrome.browser.ChromeActivity; |
| 12 import org.chromium.chrome.browser.Tab; |
| 13 import org.chromium.chrome.browser.compositor.layouts.OverviewModeBehavior; |
| 14 import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager; |
| 15 import org.chromium.chrome.browser.ntp.NativePageFactory; |
| 16 import org.chromium.chrome.browser.tabmodel.OffTheRecordTabModel.OffTheRecordTab
ModelDelegate; |
| 17 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType; |
| 18 import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType; |
| 19 import org.chromium.chrome.browser.tabmodel.TabPersistentStore.TabPersistentStor
eObserver; |
| 20 import org.chromium.content_public.browser.LoadUrlParams; |
| 21 import org.chromium.ui.base.WindowAndroid; |
| 22 |
| 23 import java.util.concurrent.atomic.AtomicBoolean; |
| 24 |
| 25 /** |
| 26 * This class manages all the ContentViews in the app. As it manipulates views,
it must be |
| 27 * instantiated and used in the UI Thread. It acts as a TabModel which delegate
s all |
| 28 * TabModel methods to the active model that it contains. |
| 29 */ |
| 30 public class TabModelSelectorImpl extends TabModelSelectorBase implements TabMod
elDelegate { |
| 31 |
| 32 private final ChromeActivity mActivity; |
| 33 |
| 34 /** Flag set to false when the asynchronous loading of tabs is finished. */ |
| 35 private final AtomicBoolean mSessionRestoreInProgress = |
| 36 new AtomicBoolean(true); |
| 37 private final TabPersistentStore mTabSaver; |
| 38 |
| 39 // This flag signifies the object has gotten an onNativeReady callback and |
| 40 // has not been destroyed. |
| 41 private boolean mActiveState = false; |
| 42 |
| 43 private final TabModelOrderController mOrderController; |
| 44 |
| 45 private OverviewModeBehavior mOverviewModeBehavior; |
| 46 |
| 47 private TabContentManager mTabContentManager; |
| 48 |
| 49 private Tab mVisibleTab; |
| 50 |
| 51 private final TabModelSelectorUma mUma; |
| 52 |
| 53 private CloseAllTabsDelegate mCloseAllTabsDelegate; |
| 54 |
| 55 private static class TabModelImplCreator implements OffTheRecordTabModelDele
gate { |
| 56 private final ChromeActivity mActivity; |
| 57 private final TabModelSelectorUma mUma; |
| 58 private final TabModelOrderController mOrderController; |
| 59 private final TabContentManager mTabContentManager; |
| 60 private final TabPersistentStore mTabSaver; |
| 61 private final TabModelDelegate mModelDelegate; |
| 62 |
| 63 /** |
| 64 * Constructor for an Incognito TabModelImpl. |
| 65 * |
| 66 * @param activity The activity owning this TabModel. |
| 67 * @param uma Handles UMA tracking for the model. |
| 68 * @param orderController Determines the order for inserting new Tabs
. |
| 69 * @param tabContentManager Manages the display content of the tab. |
| 70 * @param tabSaver Handler for saving tabs. |
| 71 * @param modelDelegate Delegate to handle external dependencies an
d interactions. |
| 72 */ |
| 73 public TabModelImplCreator(ChromeActivity activity, TabModelSelectorUma
uma, |
| 74 TabModelOrderController orderController, TabContentManager tabCo
ntentManager, |
| 75 TabPersistentStore tabSaver, TabModelDelegate modelDelegate) { |
| 76 mActivity = activity; |
| 77 mUma = uma; |
| 78 mOrderController = orderController; |
| 79 mTabContentManager = tabContentManager; |
| 80 mTabSaver = tabSaver; |
| 81 mModelDelegate = modelDelegate; |
| 82 } |
| 83 |
| 84 @Override |
| 85 public TabModel createTabModel() { |
| 86 return new TabModelImpl(true, mActivity, mUma, mOrderController, |
| 87 mTabContentManager, mTabSaver, mModelDelegate); |
| 88 } |
| 89 |
| 90 @Override |
| 91 public boolean doOffTheRecordTabsExist() { |
| 92 return TabWindowManager.getInstance().getIncognitoTabCount() > 0; |
| 93 } |
| 94 } |
| 95 |
| 96 /** |
| 97 * Builds a {@link TabModelSelectorImpl} instance. |
| 98 * @param activity The {@link ChromeActivity} this model selector lives
in. |
| 99 * @param selectorIndex The index this selector represents in the list of se
lectors. |
| 100 * @param windowAndroid The {@link WindowAndroid} associated with this model
selector. |
| 101 */ |
| 102 public TabModelSelectorImpl(ChromeActivity activity, int selectorIndex, |
| 103 WindowAndroid windowAndroid) { |
| 104 super(); |
| 105 mActivity = activity; |
| 106 mUma = new TabModelSelectorUma(mActivity); |
| 107 final TabPersistentStoreObserver persistentStoreObserver = |
| 108 new TabPersistentStoreObserver() { |
| 109 @Override |
| 110 public void onStateLoaded(Context context) { |
| 111 markTabStateInitialized(); |
| 112 } |
| 113 |
| 114 @Override |
| 115 public void onInitialized(int tabCountAtStartup) { |
| 116 RecordHistogram.recordCountHistogram("Tabs.CountAtStartup", tabC
ountAtStartup); |
| 117 } |
| 118 }; |
| 119 mTabSaver = new TabPersistentStore(this, selectorIndex, mActivity, mActi
vity, |
| 120 persistentStoreObserver); |
| 121 mOrderController = new TabModelOrderController(this); |
| 122 ChromeTabCreator regularTabCreator = new ChromeTabCreator(mActivity, win
dowAndroid, |
| 123 mOrderController, mTabSaver, false); |
| 124 ChromeTabCreator incognitoTabCreator = new ChromeTabCreator(mActivity, w
indowAndroid, |
| 125 mOrderController, mTabSaver, true); |
| 126 mActivity.setTabCreators(regularTabCreator, incognitoTabCreator); |
| 127 } |
| 128 |
| 129 @Override |
| 130 protected void markTabStateInitialized() { |
| 131 super.markTabStateInitialized(); |
| 132 if (!mSessionRestoreInProgress.getAndSet(false)) return; |
| 133 |
| 134 // This is the first time we set |
| 135 // |mSessionRestoreInProgress|, so we need to broadcast. |
| 136 TabModelImpl model = (TabModelImpl) getModel(false); |
| 137 |
| 138 if (model != null) { |
| 139 model.broadcastSessionRestoreComplete(); |
| 140 } else { |
| 141 assert false : "Normal tab model is null after tab state loaded."; |
| 142 } |
| 143 } |
| 144 |
| 145 private void handleOnPageLoadStopped(Tab tab) { |
| 146 if (tab != null) mTabSaver.addTabToSaveQueue(tab); |
| 147 } |
| 148 |
| 149 /** |
| 150 * |
| 151 * @param overviewModeBehavior The {@link OverviewModeBehavior} that should
be used to determine |
| 152 * when the app is in overview mode or not. |
| 153 */ |
| 154 public void setOverviewModeBehavior(OverviewModeBehavior overviewModeBehavio
r) { |
| 155 assert overviewModeBehavior != null; |
| 156 mOverviewModeBehavior = overviewModeBehavior; |
| 157 } |
| 158 |
| 159 /** |
| 160 * Should be called when the app starts showing a view with multiple tabs. |
| 161 */ |
| 162 public void onTabsViewShown() { |
| 163 mUma.onTabsViewShown(); |
| 164 } |
| 165 |
| 166 /** |
| 167 * Should be called once the native library is loaded so that the actual int
ernals of this |
| 168 * class can be initialized. |
| 169 * @param tabContentProvider A {@link TabContentManager
} instance. |
| 170 */ |
| 171 public void onNativeLibraryReady(TabContentManager tabContentProvider) { |
| 172 assert !mActiveState : "onNativeLibraryReady called twice!"; |
| 173 mTabContentManager = tabContentProvider; |
| 174 |
| 175 TabModel normalModel = new TabModelImpl(false, mActivity, mUma, mOrderCo
ntroller, |
| 176 mTabContentManager, mTabSaver, this); |
| 177 TabModel incognitoModel = new OffTheRecordTabModel(new TabModelImplCreat
or( |
| 178 mActivity, mUma, mOrderController, mTabContentManager, mTabSaver
, this)); |
| 179 initialize(isIncognitoSelected(), normalModel, incognitoModel); |
| 180 mActivity.getTabCreator(false).setTabModel(normalModel, mTabContentManag
er); |
| 181 mActivity.getTabCreator(true).setTabModel(incognitoModel, mTabContentMan
ager); |
| 182 |
| 183 mTabSaver.setTabContentManager(tabContentProvider); |
| 184 |
| 185 addObserver(new EmptyTabModelSelectorObserver() { |
| 186 @Override |
| 187 public void onNewTabCreated(Tab tab) { |
| 188 // Only invalidate if the tab exists in the currently selected m
odel. |
| 189 if (TabModelUtils.getTabById(getCurrentModel(), tab.getId()) !=
null) { |
| 190 mTabContentManager.invalidateIfChanged(tab.getId(), tab.getU
rl()); |
| 191 } |
| 192 } |
| 193 }); |
| 194 |
| 195 mActiveState = true; |
| 196 |
| 197 new TabModelSelectorTabObserver(this) { |
| 198 @Override |
| 199 public void onUrlUpdated(Tab tab) { |
| 200 TabModel model = getModelForTabId(tab.getId()); |
| 201 if (model == getCurrentModel()) { |
| 202 mTabContentManager.invalidateIfChanged(tab.getId(), tab.getU
rl()); |
| 203 } |
| 204 } |
| 205 |
| 206 @Override |
| 207 public void onLoadStopped(Tab tab) { |
| 208 handleOnPageLoadStopped(tab); |
| 209 } |
| 210 |
| 211 @Override |
| 212 public void onPageLoadStarted(Tab tab) { |
| 213 String url = tab.getUrl(); |
| 214 if (NativePageFactory.isNativePageUrl(url, tab.isIncognito())) { |
| 215 mTabContentManager.invalidateTabThumbnail(tab.getId(), url); |
| 216 } else { |
| 217 mTabContentManager.removeTabThumbnail(tab.getId()); |
| 218 } |
| 219 } |
| 220 |
| 221 @Override |
| 222 public void onPageLoadFinished(Tab tab) { |
| 223 mUma.onPageLoadFinished(tab.getId()); |
| 224 } |
| 225 |
| 226 @Override |
| 227 public void onPageLoadFailed(Tab tab, int errorCode) { |
| 228 mUma.onPageLoadFailed(tab.getId()); |
| 229 } |
| 230 |
| 231 @Override |
| 232 public void onCrash(Tab tab, boolean sadTabShown) { |
| 233 if (sadTabShown) { |
| 234 mTabContentManager.removeTabThumbnail(tab.getId()); |
| 235 } |
| 236 mUma.onTabCrashed(tab.getId()); |
| 237 } |
| 238 }; |
| 239 } |
| 240 |
| 241 @Override |
| 242 public void setCloseAllTabsDelegate(CloseAllTabsDelegate delegate) { |
| 243 mCloseAllTabsDelegate = delegate; |
| 244 } |
| 245 |
| 246 @Override |
| 247 public TabModel getModelAt(int index) { |
| 248 return mActiveState ? super.getModelAt(index) : EmptyTabModel.getInstanc
e(); |
| 249 } |
| 250 |
| 251 @Override |
| 252 public void selectModel(boolean incognito) { |
| 253 TabModel oldModel = getCurrentModel(); |
| 254 super.selectModel(incognito); |
| 255 TabModel newModel = getCurrentModel(); |
| 256 if (oldModel != newModel) { |
| 257 TabModelUtils.setIndex(newModel, newModel.index()); |
| 258 |
| 259 // Make the call to notifyDataSetChanged() after any delayed events |
| 260 // have had a chance to fire. Otherwise, this may result in some |
| 261 // drawing to occur before animations have a chance to work. |
| 262 new Handler().post(new Runnable() { |
| 263 @Override |
| 264 public void run() { |
| 265 notifyChanged(); |
| 266 } |
| 267 }); |
| 268 } |
| 269 } |
| 270 |
| 271 /** |
| 272 * Commits all pending tab closures for all {@link TabModel}s in this {@link
TabModelSelector}. |
| 273 */ |
| 274 @Override |
| 275 public void commitAllTabClosures() { |
| 276 for (int i = 0; i < getModels().size(); i++) { |
| 277 getModelAt(i).commitAllTabClosures(); |
| 278 } |
| 279 } |
| 280 |
| 281 @Override |
| 282 public boolean closeAllTabsRequest(boolean incognito) { |
| 283 return mCloseAllTabsDelegate.closeAllTabsRequest(incognito); |
| 284 } |
| 285 |
| 286 public void saveState() { |
| 287 commitAllTabClosures(); |
| 288 mTabSaver.saveState(); |
| 289 } |
| 290 |
| 291 /** |
| 292 * Load the saved tab state. This should be called before any new tabs are c
reated. The saved |
| 293 * tabs shall not be restored until {@link #restoreTabs} is called. |
| 294 */ |
| 295 public void loadState() { |
| 296 int nextId = mTabSaver.loadState(); |
| 297 if (nextId >= 0) Tab.incrementIdCounterTo(nextId); |
| 298 } |
| 299 |
| 300 /** |
| 301 * Restore the saved tabs which were loaded by {@link #loadState}. |
| 302 * |
| 303 * @param setActiveTab If true, synchronously load saved active tab and set
it as the current |
| 304 * active tab. |
| 305 */ |
| 306 public void restoreTabs(boolean setActiveTab) { |
| 307 mTabSaver.restoreTabs(setActiveTab); |
| 308 } |
| 309 |
| 310 /** |
| 311 * If there is an asynchronous session restore in-progress, try to synchrono
usly restore |
| 312 * the state of a tab with the given url as a frozen tab. This method has no
effect if |
| 313 * there isn't a tab being restored with this url, or the tab has already be
en restored. |
| 314 * |
| 315 * @return true if there exists a tab with the url. |
| 316 */ |
| 317 public boolean tryToRestoreTabStateForUrl(String url) { |
| 318 if (!isSessionRestoreInProgress()) return false; |
| 319 return mTabSaver.restoreTabStateForUrl(url); |
| 320 } |
| 321 |
| 322 /** |
| 323 * If there is an asynchronous session restore in-progress, try to synchrono
usly restore |
| 324 * the state of a tab with the given id as a frozen tab. This method has no
effect if |
| 325 * there isn't a tab being restored with this id, or the tab has already bee
n restored. |
| 326 * |
| 327 * @return true if there exists a tab with the id. |
| 328 */ |
| 329 public boolean tryToRestoreTabStateForId(int id) { |
| 330 if (!isSessionRestoreInProgress()) return false; |
| 331 return mTabSaver.restoreTabStateForId(id); |
| 332 } |
| 333 |
| 334 public void clearState() { |
| 335 mTabSaver.clearState(); |
| 336 } |
| 337 |
| 338 public void clearEncryptedState() { |
| 339 mTabSaver.clearEncryptedState(); |
| 340 } |
| 341 |
| 342 @Override |
| 343 public void destroy() { |
| 344 mTabSaver.destroy(); |
| 345 mUma.destroy(); |
| 346 super.destroy(); |
| 347 mActiveState = false; |
| 348 } |
| 349 |
| 350 @Override |
| 351 public Tab openNewTab(LoadUrlParams loadUrlParams, TabLaunchType type, Tab p
arent, |
| 352 boolean incognito) { |
| 353 return mActivity.getTabCreator(incognito).createNewTab(loadUrlParams, ty
pe, parent); |
| 354 } |
| 355 |
| 356 /** |
| 357 * @return Number of restored tabs on cold startup. |
| 358 */ |
| 359 public int getRestoredTabCount() { |
| 360 return mTabSaver.getRestoredTabCount(); |
| 361 } |
| 362 |
| 363 @Override |
| 364 public void requestToShowTab(Tab tab, TabSelectionType type) { |
| 365 boolean isFromExternalApp = tab != null |
| 366 && tab.getLaunchType() == TabLaunchType.FROM_EXTERNAL_APP; |
| 367 |
| 368 if (mVisibleTab != tab && tab != null && !tab.isNativePage()) { |
| 369 TabModelBase.startTabSwitchLatencyTiming(type); |
| 370 } |
| 371 if (mVisibleTab != null && mVisibleTab != tab && !mVisibleTab.needsReloa
d()) { |
| 372 // TODO(dtrainor): Once we figure out why we can't grab a snapshot f
rom the current |
| 373 // tab when we have other tabs loading from external apps remove the
checks for |
| 374 // FROM_EXTERNAL_APP/FROM_NEW. |
| 375 if (!mVisibleTab.isClosing() |
| 376 && (!isFromExternalApp || type != TabSelectionType.FROM_NEW)
) { |
| 377 cacheTabBitmap(mVisibleTab); |
| 378 } |
| 379 mVisibleTab.hide(); |
| 380 mVisibleTab.setFullscreenManager(null); |
| 381 mTabSaver.addTabToSaveQueue(mVisibleTab); |
| 382 mVisibleTab = null; |
| 383 } |
| 384 |
| 385 if (tab == null) { |
| 386 notifyChanged(); |
| 387 return; |
| 388 } |
| 389 |
| 390 // We hit this case when the user enters tab switcher and comes back to
the current tab |
| 391 // without actual tab switch. |
| 392 if (mVisibleTab == tab && !mVisibleTab.isHidden()) { |
| 393 // The current tab might have been killed by the os while in tab swi
tcher. |
| 394 tab.loadIfNeeded(); |
| 395 return; |
| 396 } |
| 397 |
| 398 tab.setFullscreenManager(mActivity.getFullscreenManager()); |
| 399 mVisibleTab = tab; |
| 400 |
| 401 // Don't execute the tab display part if Chrome has just been sent to ba
ckground. This |
| 402 // avoids uneccessary work (tab restore) and prevents pollution of tab d
isplay metrics - see |
| 403 // http://crbug.com/316166. |
| 404 if (type != TabSelectionType.FROM_EXIT) { |
| 405 tab.show(type); |
| 406 mUma.onShowTab(tab.getId(), tab.isBeingRestored()); |
| 407 } |
| 408 } |
| 409 |
| 410 private void cacheTabBitmap(Tab tabToCache) { |
| 411 // Trigger a capture of this tab. |
| 412 if (tabToCache == null) return; |
| 413 mTabContentManager.cacheTabThumbnail(tabToCache); |
| 414 } |
| 415 |
| 416 @Override |
| 417 public boolean isInOverviewMode() { |
| 418 return mOverviewModeBehavior != null && mOverviewModeBehavior.overviewVi
sible(); |
| 419 } |
| 420 |
| 421 @Override |
| 422 public boolean isSessionRestoreInProgress() { |
| 423 return mSessionRestoreInProgress.get(); |
| 424 } |
| 425 |
| 426 // TODO(tedchoc): Remove the need for this to be exposed. |
| 427 @Override |
| 428 public void notifyChanged() { |
| 429 super.notifyChanged(); |
| 430 } |
| 431 } |
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