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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/prerender/prerender_manager.h" | 5 #include "chrome/browser/prerender/prerender_manager.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <functional> | 8 #include <functional> |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
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420 if (!prerender_data) | 420 if (!prerender_data) |
421 return false; | 421 return false; |
422 DCHECK(prerender_data->contents()); | 422 DCHECK(prerender_data->contents()); |
423 if (IsNoSwapInExperiment(prerender_data->contents()->experiment_id())) | 423 if (IsNoSwapInExperiment(prerender_data->contents()->experiment_id())) |
424 return false; | 424 return false; |
425 | 425 |
426 if (WebContents* new_web_contents = | 426 if (WebContents* new_web_contents = |
427 prerender_data->contents()->prerender_contents()) { | 427 prerender_data->contents()->prerender_contents()) { |
428 if (web_contents == new_web_contents) | 428 if (web_contents == new_web_contents) |
429 return false; // Do not swap in to ourself. | 429 return false; // Do not swap in to ourself. |
| 430 |
| 431 // We cannot swap in if there is no last committed entry, because we would |
| 432 // show a blank page under an existing entry from the current tab. Even if |
| 433 // there is a pending entry, it may not commit. |
| 434 // TODO(creis): If there is a pending navigation and no last committed |
| 435 // entry, we might be able to transfer the network request instead. |
| 436 if (!new_web_contents->GetController().CanPruneAllButVisible()) |
| 437 return false; |
430 } | 438 } |
431 | 439 |
432 // Do not use the prerendered version if there is an opener object. | 440 // Do not use the prerendered version if there is an opener object. |
433 if (web_contents->HasOpener()) { | 441 if (web_contents->HasOpener()) { |
434 prerender_data->contents()->Destroy(FINAL_STATUS_WINDOW_OPENER); | 442 prerender_data->contents()->Destroy(FINAL_STATUS_WINDOW_OPENER); |
435 return false; | 443 return false; |
436 } | 444 } |
437 | 445 |
438 // If we are just in the control group (which can be detected by noticing | 446 // If we are just in the control group (which can be detected by noticing |
439 // that prerendering hasn't even started yet), record that |web_contents| now | 447 // that prerendering hasn't even started yet), record that |web_contents| now |
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513 | 521 |
514 WebContents* new_web_contents = | 522 WebContents* new_web_contents = |
515 prerender_contents->ReleasePrerenderContents(); | 523 prerender_contents->ReleasePrerenderContents(); |
516 WebContents* old_web_contents = web_contents; | 524 WebContents* old_web_contents = web_contents; |
517 DCHECK(new_web_contents); | 525 DCHECK(new_web_contents); |
518 DCHECK(old_web_contents); | 526 DCHECK(old_web_contents); |
519 | 527 |
520 MarkWebContentsAsPrerendered(new_web_contents, prerender_contents->origin()); | 528 MarkWebContentsAsPrerendered(new_web_contents, prerender_contents->origin()); |
521 | 529 |
522 // Merge the browsing history. | 530 // Merge the browsing history. |
523 new_web_contents->GetController().CopyStateFromAndPrune( | 531 CHECK(new_web_contents->GetController().CopyStateFromAndPrune( |
524 &old_web_contents->GetController()); | 532 &old_web_contents->GetController())); |
525 CoreTabHelper::FromWebContents(old_web_contents)->delegate()-> | 533 CoreTabHelper::FromWebContents(old_web_contents)->delegate()-> |
526 SwapTabContents(old_web_contents, new_web_contents); | 534 SwapTabContents(old_web_contents, new_web_contents); |
527 prerender_contents->CommitHistory(new_web_contents); | 535 prerender_contents->CommitHistory(new_web_contents); |
528 | 536 |
529 GURL icon_url = prerender_contents->icon_url(); | 537 GURL icon_url = prerender_contents->icon_url(); |
530 | 538 |
531 if (!icon_url.is_empty()) { | 539 if (!icon_url.is_empty()) { |
532 #if defined(OS_ANDROID) | 540 #if defined(OS_ANDROID) |
533 // Do the delayed icon fetch since we didn't download | 541 // Do the delayed icon fetch since we didn't download |
534 // the favicon during prerendering on mobile devices. | 542 // the favicon during prerendering on mobile devices. |
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1537 logged_in_state_->erase(domain_key); | 1545 logged_in_state_->erase(domain_key); |
1538 } | 1546 } |
1539 | 1547 |
1540 void PrerenderManager::LoggedInPredictorDataReceived( | 1548 void PrerenderManager::LoggedInPredictorDataReceived( |
1541 scoped_ptr<LoggedInStateMap> new_map) { | 1549 scoped_ptr<LoggedInStateMap> new_map) { |
1542 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | 1550 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
1543 logged_in_state_.swap(new_map); | 1551 logged_in_state_.swap(new_map); |
1544 } | 1552 } |
1545 | 1553 |
1546 } // namespace prerender | 1554 } // namespace prerender |
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