navigation_controller_impl.cc revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9
1// Copyright 2013 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 "content/browser/frame_host/navigation_controller_impl.h" 6 7#include "base/bind.h" 8#include "base/debug/trace_event.h" 9#include "base/logging.h" 10#include "base/strings/string_number_conversions.h" // Temporary 11#include "base/strings/string_util.h" 12#include "base/strings/utf_string_conversions.h" 13#include "base/time/time.h" 14#include "content/browser/browser_url_handler_impl.h" 15#include "content/browser/dom_storage/dom_storage_context_wrapper.h" 16#include "content/browser/dom_storage/session_storage_namespace_impl.h" 17#include "content/browser/frame_host/debug_urls.h" 18#include "content/browser/frame_host/interstitial_page_impl.h" 19#include "content/browser/frame_host/navigation_entry_impl.h" 20#include "content/browser/frame_host/navigation_entry_screenshot_manager.h" 21#include "content/browser/renderer_host/render_view_host_impl.h" // Temporary 22#include "content/browser/site_instance_impl.h" 23#include "content/common/frame_messages.h" 24#include "content/common/view_messages.h" 25#include "content/public/browser/browser_context.h" 26#include "content/public/browser/content_browser_client.h" 27#include "content/public/browser/invalidate_type.h" 28#include "content/public/browser/navigation_details.h" 29#include "content/public/browser/notification_service.h" 30#include "content/public/browser/notification_types.h" 31#include "content/public/browser/render_widget_host.h" 32#include "content/public/browser/render_widget_host_view.h" 33#include "content/public/browser/storage_partition.h" 34#include "content/public/browser/user_metrics.h" 35#include "content/public/common/content_client.h" 36#include "content/public/common/content_constants.h" 37#include "content/public/common/url_constants.h" 38#include "net/base/escape.h" 39#include "net/base/mime_util.h" 40#include "net/base/net_util.h" 41#include "skia/ext/platform_canvas.h" 42 43namespace content { 44namespace { 45 46const int kInvalidateAll = 0xFFFFFFFF; 47 48// Invoked when entries have been pruned, or removed. For example, if the 49// current entries are [google, digg, yahoo], with the current entry google, 50// and the user types in cnet, then digg and yahoo are pruned. 51void NotifyPrunedEntries(NavigationControllerImpl* nav_controller, 52 bool from_front, 53 int count) { 54 PrunedDetails details; 55 details.from_front = from_front; 56 details.count = count; 57 NotificationService::current()->Notify( 58 NOTIFICATION_NAV_LIST_PRUNED, 59 Source<NavigationController>(nav_controller), 60 Details<PrunedDetails>(&details)); 61} 62 63// Ensure the given NavigationEntry has a valid state, so that WebKit does not 64// get confused if we navigate back to it. 65// 66// An empty state is treated as a new navigation by WebKit, which would mean 67// losing the navigation entries and generating a new navigation entry after 68// this one. We don't want that. To avoid this we create a valid state which 69// WebKit will not treat as a new navigation. 70void SetPageStateIfEmpty(NavigationEntryImpl* entry) { 71 if (!entry->GetPageState().IsValid()) 72 entry->SetPageState(PageState::CreateFromURL(entry->GetURL())); 73} 74 75NavigationEntryImpl::RestoreType ControllerRestoreTypeToEntryType( 76 NavigationController::RestoreType type) { 77 switch (type) { 78 case NavigationController::RESTORE_CURRENT_SESSION: 79 return NavigationEntryImpl::RESTORE_CURRENT_SESSION; 80 case NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY: 81 return NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY; 82 case NavigationController::RESTORE_LAST_SESSION_CRASHED: 83 return NavigationEntryImpl::RESTORE_LAST_SESSION_CRASHED; 84 } 85 NOTREACHED(); 86 return NavigationEntryImpl::RESTORE_CURRENT_SESSION; 87} 88 89// Configure all the NavigationEntries in entries for restore. This resets 90// the transition type to reload and makes sure the content state isn't empty. 91void ConfigureEntriesForRestore( 92 std::vector<linked_ptr<NavigationEntryImpl> >* entries, 93 NavigationController::RestoreType type) { 94 for (size_t i = 0; i < entries->size(); ++i) { 95 // Use a transition type of reload so that we don't incorrectly increase 96 // the typed count. 97 (*entries)[i]->SetTransitionType(PAGE_TRANSITION_RELOAD); 98 (*entries)[i]->set_restore_type(ControllerRestoreTypeToEntryType(type)); 99 // NOTE(darin): This code is only needed for backwards compat. 100 SetPageStateIfEmpty((*entries)[i].get()); 101 } 102} 103 104// See NavigationController::IsURLInPageNavigation for how this works and why. 105bool AreURLsInPageNavigation(const GURL& existing_url, 106 const GURL& new_url, 107 bool renderer_says_in_page, 108 NavigationType navigation_type) { 109 if (existing_url == new_url) 110 return renderer_says_in_page; 111 112 if (!new_url.has_ref()) { 113 // When going back from the ref URL to the non ref one the navigation type 114 // is IN_PAGE. 115 return navigation_type == NAVIGATION_TYPE_IN_PAGE; 116 } 117 118 url_canon::Replacements<char> replacements; 119 replacements.ClearRef(); 120 return existing_url.ReplaceComponents(replacements) == 121 new_url.ReplaceComponents(replacements); 122} 123 124// Determines whether or not we should be carrying over a user agent override 125// between two NavigationEntries. 126bool ShouldKeepOverride(const NavigationEntry* last_entry) { 127 return last_entry && last_entry->GetIsOverridingUserAgent(); 128} 129 130} // namespace 131 132// NavigationControllerImpl ---------------------------------------------------- 133 134const size_t kMaxEntryCountForTestingNotSet = -1; 135 136// static 137size_t NavigationControllerImpl::max_entry_count_for_testing_ = 138 kMaxEntryCountForTestingNotSet; 139 140// Should Reload check for post data? The default is true, but is set to false 141// when testing. 142static bool g_check_for_repost = true; 143 144// static 145NavigationEntry* NavigationController::CreateNavigationEntry( 146 const GURL& url, 147 const Referrer& referrer, 148 PageTransition transition, 149 bool is_renderer_initiated, 150 const std::string& extra_headers, 151 BrowserContext* browser_context) { 152 // Allow the browser URL handler to rewrite the URL. This will, for example, 153 // remove "view-source:" from the beginning of the URL to get the URL that 154 // will actually be loaded. This real URL won't be shown to the user, just 155 // used internally. 156 GURL loaded_url(url); 157 bool reverse_on_redirect = false; 158 BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary( 159 &loaded_url, browser_context, &reverse_on_redirect); 160 161 NavigationEntryImpl* entry = new NavigationEntryImpl( 162 NULL, // The site instance for tabs is sent on navigation 163 // (WebContents::GetSiteInstance). 164 -1, 165 loaded_url, 166 referrer, 167 base::string16(), 168 transition, 169 is_renderer_initiated); 170 entry->SetVirtualURL(url); 171 entry->set_user_typed_url(url); 172 entry->set_update_virtual_url_with_url(reverse_on_redirect); 173 entry->set_extra_headers(extra_headers); 174 return entry; 175} 176 177// static 178void NavigationController::DisablePromptOnRepost() { 179 g_check_for_repost = false; 180} 181 182base::Time NavigationControllerImpl::TimeSmoother::GetSmoothedTime( 183 base::Time t) { 184 // If |t| is between the water marks, we're in a run of duplicates 185 // or just getting out of it, so increase the high-water mark to get 186 // a time that probably hasn't been used before and return it. 187 if (low_water_mark_ <= t && t <= high_water_mark_) { 188 high_water_mark_ += base::TimeDelta::FromMicroseconds(1); 189 return high_water_mark_; 190 } 191 192 // Otherwise, we're clear of the last duplicate run, so reset the 193 // water marks. 194 low_water_mark_ = high_water_mark_ = t; 195 return t; 196} 197 198NavigationControllerImpl::NavigationControllerImpl( 199 NavigationControllerDelegate* delegate, 200 BrowserContext* browser_context) 201 : browser_context_(browser_context), 202 pending_entry_(NULL), 203 last_committed_entry_index_(-1), 204 pending_entry_index_(-1), 205 transient_entry_index_(-1), 206 delegate_(delegate), 207 max_restored_page_id_(-1), 208 ssl_manager_(this), 209 needs_reload_(false), 210 is_initial_navigation_(true), 211 in_navigate_to_pending_entry_(false), 212 pending_reload_(NO_RELOAD), 213 get_timestamp_callback_(base::Bind(&base::Time::Now)), 214 screenshot_manager_(new NavigationEntryScreenshotManager(this)) { 215 DCHECK(browser_context_); 216} 217 218NavigationControllerImpl::~NavigationControllerImpl() { 219 DiscardNonCommittedEntriesInternal(); 220} 221 222WebContents* NavigationControllerImpl::GetWebContents() const { 223 return delegate_->GetWebContents(); 224} 225 226BrowserContext* NavigationControllerImpl::GetBrowserContext() const { 227 return browser_context_; 228} 229 230void NavigationControllerImpl::SetBrowserContext( 231 BrowserContext* browser_context) { 232 browser_context_ = browser_context; 233} 234 235void NavigationControllerImpl::Restore( 236 int selected_navigation, 237 RestoreType type, 238 std::vector<NavigationEntry*>* entries) { 239 // Verify that this controller is unused and that the input is valid. 240 DCHECK(GetEntryCount() == 0 && !GetPendingEntry()); 241 DCHECK(selected_navigation >= 0 && 242 selected_navigation < static_cast<int>(entries->size())); 243 244 needs_reload_ = true; 245 for (size_t i = 0; i < entries->size(); ++i) { 246 NavigationEntryImpl* entry = 247 NavigationEntryImpl::FromNavigationEntry((*entries)[i]); 248 entries_.push_back(linked_ptr<NavigationEntryImpl>(entry)); 249 } 250 entries->clear(); 251 252 // And finish the restore. 253 FinishRestore(selected_navigation, type); 254} 255 256void NavigationControllerImpl::Reload(bool check_for_repost) { 257 ReloadInternal(check_for_repost, RELOAD); 258} 259void NavigationControllerImpl::ReloadIgnoringCache(bool check_for_repost) { 260 ReloadInternal(check_for_repost, RELOAD_IGNORING_CACHE); 261} 262void NavigationControllerImpl::ReloadOriginalRequestURL(bool check_for_repost) { 263 ReloadInternal(check_for_repost, RELOAD_ORIGINAL_REQUEST_URL); 264} 265 266void NavigationControllerImpl::ReloadInternal(bool check_for_repost, 267 ReloadType reload_type) { 268 if (transient_entry_index_ != -1) { 269 // If an interstitial is showing, treat a reload as a navigation to the 270 // transient entry's URL. 271 NavigationEntryImpl* transient_entry = 272 NavigationEntryImpl::FromNavigationEntry(GetTransientEntry()); 273 if (!transient_entry) 274 return; 275 LoadURL(transient_entry->GetURL(), 276 Referrer(), 277 PAGE_TRANSITION_RELOAD, 278 transient_entry->extra_headers()); 279 return; 280 } 281 282 NavigationEntryImpl* entry = NULL; 283 int current_index = -1; 284 285 // If we are reloading the initial navigation, just use the current 286 // pending entry. Otherwise look up the current entry. 287 if (IsInitialNavigation() && pending_entry_) { 288 entry = pending_entry_; 289 // The pending entry might be in entries_ (e.g., after a Clone), so we 290 // should also update the current_index. 291 current_index = pending_entry_index_; 292 } else { 293 DiscardNonCommittedEntriesInternal(); 294 current_index = GetCurrentEntryIndex(); 295 if (current_index != -1) { 296 entry = NavigationEntryImpl::FromNavigationEntry( 297 GetEntryAtIndex(current_index)); 298 } 299 } 300 301 // If we are no where, then we can't reload. TODO(darin): We should add a 302 // CanReload method. 303 if (!entry) 304 return; 305 306 if (reload_type == NavigationControllerImpl::RELOAD_ORIGINAL_REQUEST_URL && 307 entry->GetOriginalRequestURL().is_valid() && !entry->GetHasPostData()) { 308 // We may have been redirected when navigating to the current URL. 309 // Use the URL the user originally intended to visit, if it's valid and if a 310 // POST wasn't involved; the latter case avoids issues with sending data to 311 // the wrong page. 312 entry->SetURL(entry->GetOriginalRequestURL()); 313 entry->SetReferrer(Referrer()); 314 } 315 316 if (g_check_for_repost && check_for_repost && 317 entry->GetHasPostData()) { 318 // The user is asking to reload a page with POST data. Prompt to make sure 319 // they really want to do this. If they do, the dialog will call us back 320 // with check_for_repost = false. 321 delegate_->NotifyBeforeFormRepostWarningShow(); 322 323 pending_reload_ = reload_type; 324 delegate_->ActivateAndShowRepostFormWarningDialog(); 325 } else { 326 if (!IsInitialNavigation()) 327 DiscardNonCommittedEntriesInternal(); 328 329 // If we are reloading an entry that no longer belongs to the current 330 // site instance (for example, refreshing a page for just installed app), 331 // the reload must happen in a new process. 332 // The new entry must have a new page_id and site instance, so it behaves 333 // as new navigation (which happens to clear forward history). 334 // Tabs that are discarded due to low memory conditions may not have a site 335 // instance, and should not be treated as a cross-site reload. 336 SiteInstanceImpl* site_instance = entry->site_instance(); 337 // Permit reloading guests without further checks. 338 bool is_guest = site_instance && site_instance->HasProcess() && 339 site_instance->GetProcess()->IsGuest(); 340 if (!is_guest && site_instance && 341 site_instance->HasWrongProcessForURL(entry->GetURL())) { 342 // Create a navigation entry that resembles the current one, but do not 343 // copy page id, site instance, content state, or timestamp. 344 NavigationEntryImpl* nav_entry = NavigationEntryImpl::FromNavigationEntry( 345 CreateNavigationEntry( 346 entry->GetURL(), entry->GetReferrer(), entry->GetTransitionType(), 347 false, entry->extra_headers(), browser_context_)); 348 349 // Mark the reload type as NO_RELOAD, so navigation will not be considered 350 // a reload in the renderer. 351 reload_type = NavigationController::NO_RELOAD; 352 353 nav_entry->set_should_replace_entry(true); 354 pending_entry_ = nav_entry; 355 } else { 356 pending_entry_ = entry; 357 pending_entry_index_ = current_index; 358 359 // The title of the page being reloaded might have been removed in the 360 // meanwhile, so we need to revert to the default title upon reload and 361 // invalidate the previously cached title (SetTitle will do both). 362 // See Chromium issue 96041. 363 pending_entry_->SetTitle(base::string16()); 364 365 pending_entry_->SetTransitionType(PAGE_TRANSITION_RELOAD); 366 } 367 368 NavigateToPendingEntry(reload_type); 369 } 370} 371 372void NavigationControllerImpl::CancelPendingReload() { 373 DCHECK(pending_reload_ != NO_RELOAD); 374 pending_reload_ = NO_RELOAD; 375} 376 377void NavigationControllerImpl::ContinuePendingReload() { 378 if (pending_reload_ == NO_RELOAD) { 379 NOTREACHED(); 380 } else { 381 ReloadInternal(false, pending_reload_); 382 pending_reload_ = NO_RELOAD; 383 } 384} 385 386bool NavigationControllerImpl::IsInitialNavigation() const { 387 return is_initial_navigation_; 388} 389 390NavigationEntryImpl* NavigationControllerImpl::GetEntryWithPageID( 391 SiteInstance* instance, int32 page_id) const { 392 int index = GetEntryIndexWithPageID(instance, page_id); 393 return (index != -1) ? entries_[index].get() : NULL; 394} 395 396void NavigationControllerImpl::LoadEntry(NavigationEntryImpl* entry) { 397 // When navigating to a new page, we don't know for sure if we will actually 398 // end up leaving the current page. The new page load could for example 399 // result in a download or a 'no content' response (e.g., a mailto: URL). 400 SetPendingEntry(entry); 401 NavigateToPendingEntry(NO_RELOAD); 402} 403 404void NavigationControllerImpl::SetPendingEntry(NavigationEntryImpl* entry) { 405 DiscardNonCommittedEntriesInternal(); 406 pending_entry_ = entry; 407 NotificationService::current()->Notify( 408 NOTIFICATION_NAV_ENTRY_PENDING, 409 Source<NavigationController>(this), 410 Details<NavigationEntry>(entry)); 411} 412 413NavigationEntry* NavigationControllerImpl::GetActiveEntry() const { 414 if (transient_entry_index_ != -1) 415 return entries_[transient_entry_index_].get(); 416 if (pending_entry_) 417 return pending_entry_; 418 return GetLastCommittedEntry(); 419} 420 421NavigationEntry* NavigationControllerImpl::GetVisibleEntry() const { 422 if (transient_entry_index_ != -1) 423 return entries_[transient_entry_index_].get(); 424 // The pending entry is safe to return for new (non-history), browser- 425 // initiated navigations. Most renderer-initiated navigations should not 426 // show the pending entry, to prevent URL spoof attacks. 427 // 428 // We make an exception for renderer-initiated navigations in new tabs, as 429 // long as no other page has tried to access the initial empty document in 430 // the new tab. If another page modifies this blank page, a URL spoof is 431 // possible, so we must stop showing the pending entry. 432 RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>( 433 delegate_->GetRenderViewHost()); 434 bool safe_to_show_pending = 435 pending_entry_ && 436 // Require a new navigation. 437 pending_entry_->GetPageID() == -1 && 438 // Require either browser-initiated or an unmodified new tab. 439 (!pending_entry_->is_renderer_initiated() || 440 (IsInitialNavigation() && 441 !GetLastCommittedEntry() && 442 !rvh->has_accessed_initial_document())); 443 444 // Also allow showing the pending entry for history navigations in a new tab, 445 // such as Ctrl+Back. In this case, no existing page is visible and no one 446 // can script the new tab before it commits. 447 if (!safe_to_show_pending && 448 pending_entry_ && 449 pending_entry_->GetPageID() != -1 && 450 IsInitialNavigation() && 451 !pending_entry_->is_renderer_initiated()) 452 safe_to_show_pending = true; 453 454 if (safe_to_show_pending) 455 return pending_entry_; 456 return GetLastCommittedEntry(); 457} 458 459int NavigationControllerImpl::GetCurrentEntryIndex() const { 460 if (transient_entry_index_ != -1) 461 return transient_entry_index_; 462 if (pending_entry_index_ != -1) 463 return pending_entry_index_; 464 return last_committed_entry_index_; 465} 466 467NavigationEntry* NavigationControllerImpl::GetLastCommittedEntry() const { 468 if (last_committed_entry_index_ == -1) 469 return NULL; 470 return entries_[last_committed_entry_index_].get(); 471} 472 473bool NavigationControllerImpl::CanViewSource() const { 474 const std::string& mime_type = delegate_->GetContentsMimeType(); 475 bool is_viewable_mime_type = net::IsSupportedNonImageMimeType(mime_type) && 476 !net::IsSupportedMediaMimeType(mime_type); 477 NavigationEntry* visible_entry = GetVisibleEntry(); 478 return visible_entry && !visible_entry->IsViewSourceMode() && 479 is_viewable_mime_type && !delegate_->GetInterstitialPage(); 480} 481 482int NavigationControllerImpl::GetLastCommittedEntryIndex() const { 483 return last_committed_entry_index_; 484} 485 486int NavigationControllerImpl::GetEntryCount() const { 487 DCHECK(entries_.size() <= max_entry_count()); 488 return static_cast<int>(entries_.size()); 489} 490 491NavigationEntry* NavigationControllerImpl::GetEntryAtIndex( 492 int index) const { 493 return entries_.at(index).get(); 494} 495 496NavigationEntry* NavigationControllerImpl::GetEntryAtOffset( 497 int offset) const { 498 int index = GetIndexForOffset(offset); 499 if (index < 0 || index >= GetEntryCount()) 500 return NULL; 501 502 return entries_[index].get(); 503} 504 505int NavigationControllerImpl::GetIndexForOffset(int offset) const { 506 return GetCurrentEntryIndex() + offset; 507} 508 509void NavigationControllerImpl::TakeScreenshot() { 510 screenshot_manager_->TakeScreenshot(); 511} 512 513void NavigationControllerImpl::SetScreenshotManager( 514 NavigationEntryScreenshotManager* manager) { 515 screenshot_manager_.reset(manager ? manager : 516 new NavigationEntryScreenshotManager(this)); 517} 518 519bool NavigationControllerImpl::CanGoBack() const { 520 return entries_.size() > 1 && GetCurrentEntryIndex() > 0; 521} 522 523bool NavigationControllerImpl::CanGoForward() const { 524 int index = GetCurrentEntryIndex(); 525 return index >= 0 && index < (static_cast<int>(entries_.size()) - 1); 526} 527 528bool NavigationControllerImpl::CanGoToOffset(int offset) const { 529 int index = GetIndexForOffset(offset); 530 return index >= 0 && index < GetEntryCount(); 531} 532 533void NavigationControllerImpl::GoBack() { 534 if (!CanGoBack()) { 535 NOTREACHED(); 536 return; 537 } 538 539 // Base the navigation on where we are now... 540 int current_index = GetCurrentEntryIndex(); 541 542 DiscardNonCommittedEntries(); 543 544 pending_entry_index_ = current_index - 1; 545 entries_[pending_entry_index_]->SetTransitionType( 546 PageTransitionFromInt( 547 entries_[pending_entry_index_]->GetTransitionType() | 548 PAGE_TRANSITION_FORWARD_BACK)); 549 NavigateToPendingEntry(NO_RELOAD); 550} 551 552void NavigationControllerImpl::GoForward() { 553 if (!CanGoForward()) { 554 NOTREACHED(); 555 return; 556 } 557 558 bool transient = (transient_entry_index_ != -1); 559 560 // Base the navigation on where we are now... 561 int current_index = GetCurrentEntryIndex(); 562 563 DiscardNonCommittedEntries(); 564 565 pending_entry_index_ = current_index; 566 // If there was a transient entry, we removed it making the current index 567 // the next page. 568 if (!transient) 569 pending_entry_index_++; 570 571 entries_[pending_entry_index_]->SetTransitionType( 572 PageTransitionFromInt( 573 entries_[pending_entry_index_]->GetTransitionType() | 574 PAGE_TRANSITION_FORWARD_BACK)); 575 NavigateToPendingEntry(NO_RELOAD); 576} 577 578void NavigationControllerImpl::GoToIndex(int index) { 579 if (index < 0 || index >= static_cast<int>(entries_.size())) { 580 NOTREACHED(); 581 return; 582 } 583 584 if (transient_entry_index_ != -1) { 585 if (index == transient_entry_index_) { 586 // Nothing to do when navigating to the transient. 587 return; 588 } 589 if (index > transient_entry_index_) { 590 // Removing the transient is goint to shift all entries by 1. 591 index--; 592 } 593 } 594 595 DiscardNonCommittedEntries(); 596 597 pending_entry_index_ = index; 598 entries_[pending_entry_index_]->SetTransitionType( 599 PageTransitionFromInt( 600 entries_[pending_entry_index_]->GetTransitionType() | 601 PAGE_TRANSITION_FORWARD_BACK)); 602 NavigateToPendingEntry(NO_RELOAD); 603} 604 605void NavigationControllerImpl::GoToOffset(int offset) { 606 if (!CanGoToOffset(offset)) 607 return; 608 609 GoToIndex(GetIndexForOffset(offset)); 610} 611 612bool NavigationControllerImpl::RemoveEntryAtIndex(int index) { 613 if (index == last_committed_entry_index_ || 614 index == pending_entry_index_) 615 return false; 616 617 RemoveEntryAtIndexInternal(index); 618 return true; 619} 620 621void NavigationControllerImpl::UpdateVirtualURLToURL( 622 NavigationEntryImpl* entry, const GURL& new_url) { 623 GURL new_virtual_url(new_url); 624 if (BrowserURLHandlerImpl::GetInstance()->ReverseURLRewrite( 625 &new_virtual_url, entry->GetVirtualURL(), browser_context_)) { 626 entry->SetVirtualURL(new_virtual_url); 627 } 628} 629 630void NavigationControllerImpl::LoadURL( 631 const GURL& url, 632 const Referrer& referrer, 633 PageTransition transition, 634 const std::string& extra_headers) { 635 LoadURLParams params(url); 636 params.referrer = referrer; 637 params.transition_type = transition; 638 params.extra_headers = extra_headers; 639 LoadURLWithParams(params); 640} 641 642void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) { 643 TRACE_EVENT0("browser", "NavigationControllerImpl::LoadURLWithParams"); 644 if (HandleDebugURL(params.url, params.transition_type)) 645 return; 646 647 // Any renderer-side debug URLs or javascript: URLs should be ignored if the 648 // renderer process is not live, unless it is the initial navigation of the 649 // tab. 650 if (IsRendererDebugURL(params.url)) { 651 // TODO(creis): Find the RVH for the correct frame. 652 if (!delegate_->GetRenderViewHost()->IsRenderViewLive() && 653 !IsInitialNavigation()) 654 return; 655 } 656 657 // Checks based on params.load_type. 658 switch (params.load_type) { 659 case LOAD_TYPE_DEFAULT: 660 break; 661 case LOAD_TYPE_BROWSER_INITIATED_HTTP_POST: 662 if (!params.url.SchemeIs(kHttpScheme) && 663 !params.url.SchemeIs(kHttpsScheme)) { 664 NOTREACHED() << "Http post load must use http(s) scheme."; 665 return; 666 } 667 break; 668 case LOAD_TYPE_DATA: 669 if (!params.url.SchemeIs(kDataScheme)) { 670 NOTREACHED() << "Data load must use data scheme."; 671 return; 672 } 673 break; 674 default: 675 NOTREACHED(); 676 break; 677 }; 678 679 // The user initiated a load, we don't need to reload anymore. 680 needs_reload_ = false; 681 682 bool override = false; 683 switch (params.override_user_agent) { 684 case UA_OVERRIDE_INHERIT: 685 override = ShouldKeepOverride(GetLastCommittedEntry()); 686 break; 687 case UA_OVERRIDE_TRUE: 688 override = true; 689 break; 690 case UA_OVERRIDE_FALSE: 691 override = false; 692 break; 693 default: 694 NOTREACHED(); 695 break; 696 } 697 698 NavigationEntryImpl* entry = NavigationEntryImpl::FromNavigationEntry( 699 CreateNavigationEntry( 700 params.url, 701 params.referrer, 702 params.transition_type, 703 params.is_renderer_initiated, 704 params.extra_headers, 705 browser_context_)); 706 if (params.frame_tree_node_id != -1) 707 entry->set_frame_tree_node_id(params.frame_tree_node_id); 708 if (params.redirect_chain.size() > 0) 709 entry->set_redirect_chain(params.redirect_chain); 710 if (params.should_replace_current_entry) 711 entry->set_should_replace_entry(true); 712 entry->set_should_clear_history_list(params.should_clear_history_list); 713 entry->SetIsOverridingUserAgent(override); 714 entry->set_transferred_global_request_id( 715 params.transferred_global_request_id); 716 entry->SetFrameToNavigate(params.frame_name); 717 718 switch (params.load_type) { 719 case LOAD_TYPE_DEFAULT: 720 break; 721 case LOAD_TYPE_BROWSER_INITIATED_HTTP_POST: 722 entry->SetHasPostData(true); 723 entry->SetBrowserInitiatedPostData( 724 params.browser_initiated_post_data.get()); 725 break; 726 case LOAD_TYPE_DATA: 727 entry->SetBaseURLForDataURL(params.base_url_for_data_url); 728 entry->SetVirtualURL(params.virtual_url_for_data_url); 729 entry->SetCanLoadLocalResources(params.can_load_local_resources); 730 break; 731 default: 732 NOTREACHED(); 733 break; 734 }; 735 736 LoadEntry(entry); 737} 738 739bool NavigationControllerImpl::RendererDidNavigate( 740 RenderFrameHost* rfh, 741 const FrameHostMsg_DidCommitProvisionalLoad_Params& params, 742 LoadCommittedDetails* details) { 743 is_initial_navigation_ = false; 744 745 // Save the previous state before we clobber it. 746 if (GetLastCommittedEntry()) { 747 details->previous_url = GetLastCommittedEntry()->GetURL(); 748 details->previous_entry_index = GetLastCommittedEntryIndex(); 749 } else { 750 details->previous_url = GURL(); 751 details->previous_entry_index = -1; 752 } 753 754 // If we have a pending entry at this point, it should have a SiteInstance. 755 // Restored entries start out with a null SiteInstance, but we should have 756 // assigned one in NavigateToPendingEntry. 757 DCHECK(pending_entry_index_ == -1 || pending_entry_->site_instance()); 758 759 // If we are doing a cross-site reload, we need to replace the existing 760 // navigation entry, not add another entry to the history. This has the side 761 // effect of removing forward browsing history, if such existed. 762 // Or if we are doing a cross-site redirect navigation, 763 // we will do a similar thing. 764 details->did_replace_entry = 765 pending_entry_ && pending_entry_->should_replace_entry(); 766 767 // Do navigation-type specific actions. These will make and commit an entry. 768 details->type = ClassifyNavigation(rfh, params); 769 770 // is_in_page must be computed before the entry gets committed. 771 details->is_in_page = IsURLInPageNavigation( 772 params.url, params.was_within_same_page, details->type); 773 774 switch (details->type) { 775 case NAVIGATION_TYPE_NEW_PAGE: 776 RendererDidNavigateToNewPage(rfh, params, details->did_replace_entry); 777 break; 778 case NAVIGATION_TYPE_EXISTING_PAGE: 779 RendererDidNavigateToExistingPage(rfh, params); 780 break; 781 case NAVIGATION_TYPE_SAME_PAGE: 782 RendererDidNavigateToSamePage(rfh, params); 783 break; 784 case NAVIGATION_TYPE_IN_PAGE: 785 RendererDidNavigateInPage(rfh, params, &details->did_replace_entry); 786 break; 787 case NAVIGATION_TYPE_NEW_SUBFRAME: 788 RendererDidNavigateNewSubframe(rfh, params); 789 break; 790 case NAVIGATION_TYPE_AUTO_SUBFRAME: 791 if (!RendererDidNavigateAutoSubframe(rfh, params)) 792 return false; 793 break; 794 case NAVIGATION_TYPE_NAV_IGNORE: 795 // If a pending navigation was in progress, this canceled it. We should 796 // discard it and make sure it is removed from the URL bar. After that, 797 // there is nothing we can do with this navigation, so we just return to 798 // the caller that nothing has happened. 799 if (pending_entry_) { 800 DiscardNonCommittedEntries(); 801 delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL); 802 } 803 return false; 804 default: 805 NOTREACHED(); 806 } 807 808 // At this point, we know that the navigation has just completed, so 809 // record the time. 810 // 811 // TODO(akalin): Use "sane time" as described in 812 // http://www.chromium.org/developers/design-documents/sane-time . 813 base::Time timestamp = 814 time_smoother_.GetSmoothedTime(get_timestamp_callback_.Run()); 815 DVLOG(1) << "Navigation finished at (smoothed) timestamp " 816 << timestamp.ToInternalValue(); 817 818 // We should not have a pending entry anymore. Clear it again in case any 819 // error cases above forgot to do so. 820 DiscardNonCommittedEntriesInternal(); 821 822 // All committed entries should have nonempty content state so WebKit doesn't 823 // get confused when we go back to them (see the function for details). 824 DCHECK(params.page_state.IsValid()); 825 NavigationEntryImpl* active_entry = 826 NavigationEntryImpl::FromNavigationEntry(GetLastCommittedEntry()); 827 active_entry->SetTimestamp(timestamp); 828 active_entry->SetHttpStatusCode(params.http_status_code); 829 active_entry->SetPageState(params.page_state); 830 831 // Once it is committed, we no longer need to track several pieces of state on 832 // the entry. 833 active_entry->ResetForCommit(); 834 835 // The active entry's SiteInstance should match our SiteInstance. 836 // TODO(creis): This check won't pass for subframes until we create entries 837 // for subframe navigations. 838 if (PageTransitionIsMainFrame(params.transition)) 839 CHECK(active_entry->site_instance() == rfh->GetSiteInstance()); 840 841 // Remember the bindings the renderer process has at this point, so that 842 // we do not grant this entry additional bindings if we come back to it. 843 active_entry->SetBindings( 844 static_cast<RenderFrameHostImpl*>(rfh)->GetEnabledBindings()); 845 846 // Now prep the rest of the details for the notification and broadcast. 847 details->entry = active_entry; 848 details->is_main_frame = 849 PageTransitionIsMainFrame(params.transition); 850 details->serialized_security_info = params.security_info; 851 details->http_status_code = params.http_status_code; 852 NotifyNavigationEntryCommitted(details); 853 854 return true; 855} 856 857NavigationType NavigationControllerImpl::ClassifyNavigation( 858 RenderFrameHost* rfh, 859 const FrameHostMsg_DidCommitProvisionalLoad_Params& params) const { 860 if (params.page_id == -1) { 861 // The renderer generates the page IDs, and so if it gives us the invalid 862 // page ID (-1) we know it didn't actually navigate. This happens in a few 863 // cases: 864 // 865 // - If a page makes a popup navigated to about blank, and then writes 866 // stuff like a subframe navigated to a real page. We'll get the commit 867 // for the subframe, but there won't be any commit for the outer page. 868 // 869 // - We were also getting these for failed loads (for example, bug 21849). 870 // The guess is that we get a "load commit" for the alternate error page, 871 // but that doesn't affect the page ID, so we get the "old" one, which 872 // could be invalid. This can also happen for a cross-site transition 873 // that causes us to swap processes. Then the error page load will be in 874 // a new process with no page IDs ever assigned (and hence a -1 value), 875 // yet the navigation controller still might have previous pages in its 876 // list. 877 // 878 // In these cases, there's nothing we can do with them, so ignore. 879 return NAVIGATION_TYPE_NAV_IGNORE; 880 } 881 882 if (params.page_id > delegate_->GetMaxPageIDForSiteInstance( 883 rfh->GetSiteInstance())) { 884 // Greater page IDs than we've ever seen before are new pages. We may or may 885 // not have a pending entry for the page, and this may or may not be the 886 // main frame. 887 if (PageTransitionIsMainFrame(params.transition)) 888 return NAVIGATION_TYPE_NEW_PAGE; 889 890 // When this is a new subframe navigation, we should have a committed page 891 // for which it's a suframe in. This may not be the case when an iframe is 892 // navigated on a popup navigated to about:blank (the iframe would be 893 // written into the popup by script on the main page). For these cases, 894 // there isn't any navigation stuff we can do, so just ignore it. 895 if (!GetLastCommittedEntry()) 896 return NAVIGATION_TYPE_NAV_IGNORE; 897 898 // Valid subframe navigation. 899 return NAVIGATION_TYPE_NEW_SUBFRAME; 900 } 901 902 // We only clear the session history when navigating to a new page. 903 DCHECK(!params.history_list_was_cleared); 904 905 // Now we know that the notification is for an existing page. Find that entry. 906 int existing_entry_index = GetEntryIndexWithPageID( 907 rfh->GetSiteInstance(), 908 params.page_id); 909 if (existing_entry_index == -1) { 910 // The page was not found. It could have been pruned because of the limit on 911 // back/forward entries (not likely since we'll usually tell it to navigate 912 // to such entries). It could also mean that the renderer is smoking crack. 913 NOTREACHED(); 914 915 // Because the unknown entry has committed, we risk showing the wrong URL in 916 // release builds. Instead, we'll kill the renderer process to be safe. 917 LOG(ERROR) << "terminating renderer for bad navigation: " << params.url; 918 RecordAction(base::UserMetricsAction("BadMessageTerminate_NC")); 919 920 // Temporary code so we can get more information. Format: 921 // http://url/foo.html#page1#max3#frame1#ids:2_Nx,1_1x,3_2 922 std::string temp = params.url.spec(); 923 temp.append("#page"); 924 temp.append(base::IntToString(params.page_id)); 925 temp.append("#max"); 926 temp.append(base::IntToString(delegate_->GetMaxPageID())); 927 temp.append("#frame"); 928 temp.append(base::IntToString(rfh->GetRoutingID())); 929 temp.append("#ids"); 930 for (int i = 0; i < static_cast<int>(entries_.size()); ++i) { 931 // Append entry metadata (e.g., 3_7x): 932 // 3: page_id 933 // 7: SiteInstance ID, or N for null 934 // x: appended if not from the current SiteInstance 935 temp.append(base::IntToString(entries_[i]->GetPageID())); 936 temp.append("_"); 937 if (entries_[i]->site_instance()) 938 temp.append(base::IntToString(entries_[i]->site_instance()->GetId())); 939 else 940 temp.append("N"); 941 if (entries_[i]->site_instance() != rfh->GetSiteInstance()) 942 temp.append("x"); 943 temp.append(","); 944 } 945 GURL url(temp); 946 static_cast<RenderFrameHostImpl*>(rfh)->render_view_host()->Send( 947 new ViewMsg_TempCrashWithData(url)); 948 return NAVIGATION_TYPE_NAV_IGNORE; 949 } 950 NavigationEntryImpl* existing_entry = entries_[existing_entry_index].get(); 951 952 if (!PageTransitionIsMainFrame(params.transition)) { 953 // All manual subframes would get new IDs and were handled above, so we 954 // know this is auto. Since the current page was found in the navigation 955 // entry list, we're guaranteed to have a last committed entry. 956 DCHECK(GetLastCommittedEntry()); 957 return NAVIGATION_TYPE_AUTO_SUBFRAME; 958 } 959 960 // Anything below here we know is a main frame navigation. 961 if (pending_entry_ && 962 !pending_entry_->is_renderer_initiated() && 963 existing_entry != pending_entry_ && 964 pending_entry_->GetPageID() == -1 && 965 existing_entry == GetLastCommittedEntry()) { 966 // In this case, we have a pending entry for a URL but WebCore didn't do a 967 // new navigation. This happens when you press enter in the URL bar to 968 // reload. We will create a pending entry, but WebKit will convert it to 969 // a reload since it's the same page and not create a new entry for it 970 // (the user doesn't want to have a new back/forward entry when they do 971 // this). If this matches the last committed entry, we want to just ignore 972 // the pending entry and go back to where we were (the "existing entry"). 973 return NAVIGATION_TYPE_SAME_PAGE; 974 } 975 976 // Any toplevel navigations with the same base (minus the reference fragment) 977 // are in-page navigations. We weeded out subframe navigations above. Most of 978 // the time this doesn't matter since WebKit doesn't tell us about subframe 979 // navigations that don't actually navigate, but it can happen when there is 980 // an encoding override (it always sends a navigation request). 981 if (AreURLsInPageNavigation(existing_entry->GetURL(), params.url, 982 params.was_within_same_page, 983 NAVIGATION_TYPE_UNKNOWN)) { 984 return NAVIGATION_TYPE_IN_PAGE; 985 } 986 987 // Since we weeded out "new" navigations above, we know this is an existing 988 // (back/forward) navigation. 989 return NAVIGATION_TYPE_EXISTING_PAGE; 990} 991 992void NavigationControllerImpl::RendererDidNavigateToNewPage( 993 RenderFrameHost* rfh, 994 const FrameHostMsg_DidCommitProvisionalLoad_Params& params, 995 bool replace_entry) { 996 NavigationEntryImpl* new_entry; 997 bool update_virtual_url; 998 // Only make a copy of the pending entry if it is appropriate for the new page 999 // that was just loaded. We verify this at a coarse grain by checking that 1000 // the SiteInstance hasn't been assigned to something else. 1001 if (pending_entry_ && 1002 (!pending_entry_->site_instance() || 1003 pending_entry_->site_instance() == rfh->GetSiteInstance())) { 1004 new_entry = new NavigationEntryImpl(*pending_entry_); 1005 1006 // Don't use the page type from the pending entry. Some interstitial page 1007 // may have set the type to interstitial. Once we commit, however, the page 1008 // type must always be normal. 1009 new_entry->set_page_type(PAGE_TYPE_NORMAL); 1010 update_virtual_url = new_entry->update_virtual_url_with_url(); 1011 } else { 1012 new_entry = new NavigationEntryImpl; 1013 1014 // Find out whether the new entry needs to update its virtual URL on URL 1015 // change and set up the entry accordingly. This is needed to correctly 1016 // update the virtual URL when replaceState is called after a pushState. 1017 GURL url = params.url; 1018 bool needs_update = false; 1019 BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary( 1020 &url, browser_context_, &needs_update); 1021 new_entry->set_update_virtual_url_with_url(needs_update); 1022 1023 // When navigating to a new page, give the browser URL handler a chance to 1024 // update the virtual URL based on the new URL. For example, this is needed 1025 // to show chrome://bookmarks/#1 when the bookmarks webui extension changes 1026 // the URL. 1027 update_virtual_url = needs_update; 1028 } 1029 1030 new_entry->SetURL(params.url); 1031 if (update_virtual_url) 1032 UpdateVirtualURLToURL(new_entry, params.url); 1033 new_entry->SetReferrer(params.referrer); 1034 new_entry->SetPageID(params.page_id); 1035 new_entry->SetTransitionType(params.transition); 1036 new_entry->set_site_instance( 1037 static_cast<SiteInstanceImpl*>(rfh->GetSiteInstance())); 1038 new_entry->SetHasPostData(params.is_post); 1039 new_entry->SetPostID(params.post_id); 1040 new_entry->SetOriginalRequestURL(params.original_request_url); 1041 new_entry->SetIsOverridingUserAgent(params.is_overriding_user_agent); 1042 1043 DCHECK(!params.history_list_was_cleared || !replace_entry); 1044 // The browser requested to clear the session history when it initiated the 1045 // navigation. Now we know that the renderer has updated its state accordingly 1046 // and it is safe to also clear the browser side history. 1047 if (params.history_list_was_cleared) { 1048 DiscardNonCommittedEntriesInternal(); 1049 entries_.clear(); 1050 last_committed_entry_index_ = -1; 1051 } 1052 1053 InsertOrReplaceEntry(new_entry, replace_entry); 1054} 1055 1056void NavigationControllerImpl::RendererDidNavigateToExistingPage( 1057 RenderFrameHost* rfh, 1058 const FrameHostMsg_DidCommitProvisionalLoad_Params& params) { 1059 // We should only get here for main frame navigations. 1060 DCHECK(PageTransitionIsMainFrame(params.transition)); 1061 1062 // This is a back/forward navigation. The existing page for the ID is 1063 // guaranteed to exist by ClassifyNavigation, and we just need to update it 1064 // with new information from the renderer. 1065 int entry_index = GetEntryIndexWithPageID(rfh->GetSiteInstance(), 1066 params.page_id); 1067 DCHECK(entry_index >= 0 && 1068 entry_index < static_cast<int>(entries_.size())); 1069 NavigationEntryImpl* entry = entries_[entry_index].get(); 1070 1071 // The URL may have changed due to redirects. 1072 entry->SetURL(params.url); 1073 entry->SetReferrer(params.referrer); 1074 if (entry->update_virtual_url_with_url()) 1075 UpdateVirtualURLToURL(entry, params.url); 1076 1077 // The redirected to page should not inherit the favicon from the previous 1078 // page. 1079 if (PageTransitionIsRedirect(params.transition)) 1080 entry->GetFavicon() = FaviconStatus(); 1081 1082 // The site instance will normally be the same except during session restore, 1083 // when no site instance will be assigned. 1084 DCHECK(entry->site_instance() == NULL || 1085 entry->site_instance() == rfh->GetSiteInstance()); 1086 entry->set_site_instance( 1087 static_cast<SiteInstanceImpl*>(rfh->GetSiteInstance())); 1088 1089 entry->SetHasPostData(params.is_post); 1090 entry->SetPostID(params.post_id); 1091 1092 // The entry we found in the list might be pending if the user hit 1093 // back/forward/reload. This load should commit it (since it's already in the 1094 // list, we can just discard the pending pointer). We should also discard the 1095 // pending entry if it corresponds to a different navigation, since that one 1096 // is now likely canceled. If it is not canceled, we will treat it as a new 1097 // navigation when it arrives, which is also ok. 1098 // 1099 // Note that we need to use the "internal" version since we don't want to 1100 // actually change any other state, just kill the pointer. 1101 DiscardNonCommittedEntriesInternal(); 1102 1103 // If a transient entry was removed, the indices might have changed, so we 1104 // have to query the entry index again. 1105 last_committed_entry_index_ = 1106 GetEntryIndexWithPageID(rfh->GetSiteInstance(), params.page_id); 1107} 1108 1109void NavigationControllerImpl::RendererDidNavigateToSamePage( 1110 RenderFrameHost* rfh, 1111 const FrameHostMsg_DidCommitProvisionalLoad_Params& params) { 1112 // This mode implies we have a pending entry that's the same as an existing 1113 // entry for this page ID. This entry is guaranteed to exist by 1114 // ClassifyNavigation. All we need to do is update the existing entry. 1115 NavigationEntryImpl* existing_entry = GetEntryWithPageID( 1116 rfh->GetSiteInstance(), params.page_id); 1117 1118 // We assign the entry's unique ID to be that of the new one. Since this is 1119 // always the result of a user action, we want to dismiss infobars, etc. like 1120 // a regular user-initiated navigation. 1121 existing_entry->set_unique_id(pending_entry_->GetUniqueID()); 1122 1123 // The URL may have changed due to redirects. 1124 if (existing_entry->update_virtual_url_with_url()) 1125 UpdateVirtualURLToURL(existing_entry, params.url); 1126 existing_entry->SetURL(params.url); 1127 existing_entry->SetReferrer(params.referrer); 1128 1129 // The page may have been requested with a different HTTP method. 1130 existing_entry->SetHasPostData(params.is_post); 1131 existing_entry->SetPostID(params.post_id); 1132 1133 DiscardNonCommittedEntries(); 1134} 1135 1136void NavigationControllerImpl::RendererDidNavigateInPage( 1137 RenderFrameHost* rfh, 1138 const FrameHostMsg_DidCommitProvisionalLoad_Params& params, 1139 bool* did_replace_entry) { 1140 DCHECK(PageTransitionIsMainFrame(params.transition)) << 1141 "WebKit should only tell us about in-page navs for the main frame."; 1142 // We're guaranteed to have an entry for this one. 1143 NavigationEntryImpl* existing_entry = GetEntryWithPageID( 1144 rfh->GetSiteInstance(), params.page_id); 1145 1146 // Reference fragment navigation. We're guaranteed to have the last_committed 1147 // entry and it will be the same page as the new navigation (minus the 1148 // reference fragments, of course). We'll update the URL of the existing 1149 // entry without pruning the forward history. 1150 existing_entry->SetURL(params.url); 1151 if (existing_entry->update_virtual_url_with_url()) 1152 UpdateVirtualURLToURL(existing_entry, params.url); 1153 1154 // This replaces the existing entry since the page ID didn't change. 1155 *did_replace_entry = true; 1156 1157 DiscardNonCommittedEntriesInternal(); 1158 1159 // If a transient entry was removed, the indices might have changed, so we 1160 // have to query the entry index again. 1161 last_committed_entry_index_ = 1162 GetEntryIndexWithPageID(rfh->GetSiteInstance(), params.page_id); 1163} 1164 1165void NavigationControllerImpl::RendererDidNavigateNewSubframe( 1166 RenderFrameHost* rfh, 1167 const FrameHostMsg_DidCommitProvisionalLoad_Params& params) { 1168 if (PageTransitionCoreTypeIs(params.transition, 1169 PAGE_TRANSITION_AUTO_SUBFRAME)) { 1170 // This is not user-initiated. Ignore. 1171 DiscardNonCommittedEntriesInternal(); 1172 return; 1173 } 1174 1175 // Manual subframe navigations just get the current entry cloned so the user 1176 // can go back or forward to it. The actual subframe information will be 1177 // stored in the page state for each of those entries. This happens out of 1178 // band with the actual navigations. 1179 DCHECK(GetLastCommittedEntry()) << "ClassifyNavigation should guarantee " 1180 << "that a last committed entry exists."; 1181 NavigationEntryImpl* new_entry = new NavigationEntryImpl( 1182 *NavigationEntryImpl::FromNavigationEntry(GetLastCommittedEntry())); 1183 new_entry->SetPageID(params.page_id); 1184 InsertOrReplaceEntry(new_entry, false); 1185} 1186 1187bool NavigationControllerImpl::RendererDidNavigateAutoSubframe( 1188 RenderFrameHost* rfh, 1189 const FrameHostMsg_DidCommitProvisionalLoad_Params& params) { 1190 // We're guaranteed to have a previously committed entry, and we now need to 1191 // handle navigation inside of a subframe in it without creating a new entry. 1192 DCHECK(GetLastCommittedEntry()); 1193 1194 // Handle the case where we're navigating back/forward to a previous subframe 1195 // navigation entry. This is case "2." in NAV_AUTO_SUBFRAME comment in the 1196 // header file. In case "1." this will be a NOP. 1197 int entry_index = GetEntryIndexWithPageID( 1198 rfh->GetSiteInstance(), 1199 params.page_id); 1200 if (entry_index < 0 || 1201 entry_index >= static_cast<int>(entries_.size())) { 1202 NOTREACHED(); 1203 return false; 1204 } 1205 1206 // Update the current navigation entry in case we're going back/forward. 1207 if (entry_index != last_committed_entry_index_) { 1208 last_committed_entry_index_ = entry_index; 1209 DiscardNonCommittedEntriesInternal(); 1210 return true; 1211 } 1212 1213 // We do not need to discard the pending entry in this case, since we will 1214 // not generate commit notifications for this auto-subframe navigation. 1215 return false; 1216} 1217 1218int NavigationControllerImpl::GetIndexOfEntry( 1219 const NavigationEntryImpl* entry) const { 1220 const NavigationEntries::const_iterator i(std::find( 1221 entries_.begin(), 1222 entries_.end(), 1223 entry)); 1224 return (i == entries_.end()) ? -1 : static_cast<int>(i - entries_.begin()); 1225} 1226 1227bool NavigationControllerImpl::IsURLInPageNavigation( 1228 const GURL& url, 1229 bool renderer_says_in_page, 1230 NavigationType navigation_type) const { 1231 NavigationEntry* last_committed = GetLastCommittedEntry(); 1232 return last_committed && AreURLsInPageNavigation( 1233 last_committed->GetURL(), url, renderer_says_in_page, navigation_type); 1234} 1235 1236void NavigationControllerImpl::CopyStateFrom( 1237 const NavigationController& temp) { 1238 const NavigationControllerImpl& source = 1239 static_cast<const NavigationControllerImpl&>(temp); 1240 // Verify that we look new. 1241 DCHECK(GetEntryCount() == 0 && !GetPendingEntry()); 1242 1243 if (source.GetEntryCount() == 0) 1244 return; // Nothing new to do. 1245 1246 needs_reload_ = true; 1247 InsertEntriesFrom(source, source.GetEntryCount()); 1248 1249 for (SessionStorageNamespaceMap::const_iterator it = 1250 source.session_storage_namespace_map_.begin(); 1251 it != source.session_storage_namespace_map_.end(); 1252 ++it) { 1253 SessionStorageNamespaceImpl* source_namespace = 1254 static_cast<SessionStorageNamespaceImpl*>(it->second.get()); 1255 session_storage_namespace_map_[it->first] = source_namespace->Clone(); 1256 } 1257 1258 FinishRestore(source.last_committed_entry_index_, RESTORE_CURRENT_SESSION); 1259 1260 // Copy the max page id map from the old tab to the new tab. This ensures 1261 // that new and existing navigations in the tab's current SiteInstances 1262 // are identified properly. 1263 delegate_->CopyMaxPageIDsFrom(source.delegate()->GetWebContents()); 1264} 1265 1266void NavigationControllerImpl::CopyStateFromAndPrune( 1267 NavigationController* temp, 1268 bool replace_entry) { 1269 // It is up to callers to check the invariants before calling this. 1270 CHECK(CanPruneAllButLastCommitted()); 1271 1272 NavigationControllerImpl* source = 1273 static_cast<NavigationControllerImpl*>(temp); 1274 // The SiteInstance and page_id of the last committed entry needs to be 1275 // remembered at this point, in case there is only one committed entry 1276 // and it is pruned. We use a scoped_refptr to ensure the SiteInstance 1277 // can't be freed during this time period. 1278 NavigationEntryImpl* last_committed = 1279 NavigationEntryImpl::FromNavigationEntry(GetLastCommittedEntry()); 1280 scoped_refptr<SiteInstance> site_instance( 1281 last_committed->site_instance()); 1282 int32 minimum_page_id = last_committed->GetPageID(); 1283 int32 max_page_id = 1284 delegate_->GetMaxPageIDForSiteInstance(site_instance.get()); 1285 1286 // Remove all the entries leaving the active entry. 1287 PruneAllButLastCommittedInternal(); 1288 1289 // We now have one entry, possibly with a new pending entry. Ensure that 1290 // adding the entries from source won't put us over the limit. 1291 DCHECK_EQ(1, GetEntryCount()); 1292 if (!replace_entry) 1293 source->PruneOldestEntryIfFull(); 1294 1295 // Insert the entries from source. Don't use source->GetCurrentEntryIndex as 1296 // we don't want to copy over the transient entry. Ignore any pending entry, 1297 // since it has not committed in source. 1298 int max_source_index = source->last_committed_entry_index_; 1299 if (max_source_index == -1) 1300 max_source_index = source->GetEntryCount(); 1301 else 1302 max_source_index++; 1303 1304 // Ignore the source's current entry if merging with replacement. 1305 // TODO(davidben): This should preserve entries forward of the current 1306 // too. http://crbug.com/317872 1307 if (replace_entry && max_source_index > 0) 1308 max_source_index--; 1309 1310 InsertEntriesFrom(*source, max_source_index); 1311 1312 // Adjust indices such that the last entry and pending are at the end now. 1313 last_committed_entry_index_ = GetEntryCount() - 1; 1314 1315 delegate_->SetHistoryLengthAndPrune(site_instance.get(), 1316 max_source_index, 1317 minimum_page_id); 1318 1319 // Copy the max page id map from the old tab to the new tab. This ensures 1320 // that new and existing navigations in the tab's current SiteInstances 1321 // are identified properly. 1322 delegate_->CopyMaxPageIDsFrom(source->delegate()->GetWebContents()); 1323 1324 // If there is a last committed entry, be sure to include it in the new 1325 // max page ID map. 1326 if (max_page_id > -1) { 1327 delegate_->UpdateMaxPageIDForSiteInstance(site_instance.get(), 1328 max_page_id); 1329 } 1330} 1331 1332bool NavigationControllerImpl::CanPruneAllButLastCommitted() { 1333 // If there is no last committed entry, we cannot prune. Even if there is a 1334 // pending entry, it may not commit, leaving this WebContents blank, despite 1335 // possibly giving it new entries via CopyStateFromAndPrune. 1336 if (last_committed_entry_index_ == -1) 1337 return false; 1338 1339 // We cannot prune if there is a pending entry at an existing entry index. 1340 // It may not commit, so we have to keep the last committed entry, and thus 1341 // there is no sensible place to keep the pending entry. It is ok to have 1342 // a new pending entry, which can optionally commit as a new navigation. 1343 if (pending_entry_index_ != -1) 1344 return false; 1345 1346 // We should not prune if we are currently showing a transient entry. 1347 if (transient_entry_index_ != -1) 1348 return false; 1349 1350 return true; 1351} 1352 1353void NavigationControllerImpl::PruneAllButLastCommitted() { 1354 PruneAllButLastCommittedInternal(); 1355 1356 // We should still have a last committed entry. 1357 DCHECK_NE(-1, last_committed_entry_index_); 1358 1359 // We pass 0 instead of GetEntryCount() for the history_length parameter of 1360 // SetHistoryLengthAndPrune, because it will create history_length additional 1361 // history entries. 1362 // TODO(jochen): This API is confusing and we should clean it up. 1363 // http://crbug.com/178491 1364 NavigationEntryImpl* entry = 1365 NavigationEntryImpl::FromNavigationEntry(GetVisibleEntry()); 1366 delegate_->SetHistoryLengthAndPrune( 1367 entry->site_instance(), 0, entry->GetPageID()); 1368} 1369 1370void NavigationControllerImpl::PruneAllButLastCommittedInternal() { 1371 // It is up to callers to check the invariants before calling this. 1372 CHECK(CanPruneAllButLastCommitted()); 1373 1374 // Erase all entries but the last committed entry. There may still be a 1375 // new pending entry after this. 1376 entries_.erase(entries_.begin(), 1377 entries_.begin() + last_committed_entry_index_); 1378 entries_.erase(entries_.begin() + 1, entries_.end()); 1379 last_committed_entry_index_ = 0; 1380} 1381 1382void NavigationControllerImpl::ClearAllScreenshots() { 1383 screenshot_manager_->ClearAllScreenshots(); 1384} 1385 1386void NavigationControllerImpl::SetSessionStorageNamespace( 1387 const std::string& partition_id, 1388 SessionStorageNamespace* session_storage_namespace) { 1389 if (!session_storage_namespace) 1390 return; 1391 1392 // We can't overwrite an existing SessionStorage without violating spec. 1393 // Attempts to do so may give a tab access to another tab's session storage 1394 // so die hard on an error. 1395 bool successful_insert = session_storage_namespace_map_.insert( 1396 make_pair(partition_id, 1397 static_cast<SessionStorageNamespaceImpl*>( 1398 session_storage_namespace))) 1399 .second; 1400 CHECK(successful_insert) << "Cannot replace existing SessionStorageNamespace"; 1401} 1402 1403void NavigationControllerImpl::SetMaxRestoredPageID(int32 max_id) { 1404 max_restored_page_id_ = max_id; 1405} 1406 1407int32 NavigationControllerImpl::GetMaxRestoredPageID() const { 1408 return max_restored_page_id_; 1409} 1410 1411SessionStorageNamespace* 1412NavigationControllerImpl::GetSessionStorageNamespace(SiteInstance* instance) { 1413 std::string partition_id; 1414 if (instance) { 1415 // TODO(ajwong): When GetDefaultSessionStorageNamespace() goes away, remove 1416 // this if statement so |instance| must not be NULL. 1417 partition_id = 1418 GetContentClient()->browser()->GetStoragePartitionIdForSite( 1419 browser_context_, instance->GetSiteURL()); 1420 } 1421 1422 SessionStorageNamespaceMap::const_iterator it = 1423 session_storage_namespace_map_.find(partition_id); 1424 if (it != session_storage_namespace_map_.end()) 1425 return it->second.get(); 1426 1427 // Create one if no one has accessed session storage for this partition yet. 1428 // 1429 // TODO(ajwong): Should this use the |partition_id| directly rather than 1430 // re-lookup via |instance|? http://crbug.com/142685 1431 StoragePartition* partition = 1432 BrowserContext::GetStoragePartition(browser_context_, instance); 1433 SessionStorageNamespaceImpl* session_storage_namespace = 1434 new SessionStorageNamespaceImpl( 1435 static_cast<DOMStorageContextWrapper*>( 1436 partition->GetDOMStorageContext())); 1437 session_storage_namespace_map_[partition_id] = session_storage_namespace; 1438 1439 return session_storage_namespace; 1440} 1441 1442SessionStorageNamespace* 1443NavigationControllerImpl::GetDefaultSessionStorageNamespace() { 1444 // TODO(ajwong): Remove if statement in GetSessionStorageNamespace(). 1445 return GetSessionStorageNamespace(NULL); 1446} 1447 1448const SessionStorageNamespaceMap& 1449NavigationControllerImpl::GetSessionStorageNamespaceMap() const { 1450 return session_storage_namespace_map_; 1451} 1452 1453bool NavigationControllerImpl::NeedsReload() const { 1454 return needs_reload_; 1455} 1456 1457void NavigationControllerImpl::SetNeedsReload() { 1458 needs_reload_ = true; 1459} 1460 1461void NavigationControllerImpl::RemoveEntryAtIndexInternal(int index) { 1462 DCHECK(index < GetEntryCount()); 1463 DCHECK(index != last_committed_entry_index_); 1464 1465 DiscardNonCommittedEntries(); 1466 1467 entries_.erase(entries_.begin() + index); 1468 if (last_committed_entry_index_ > index) 1469 last_committed_entry_index_--; 1470} 1471 1472void NavigationControllerImpl::DiscardNonCommittedEntries() { 1473 bool transient = transient_entry_index_ != -1; 1474 DiscardNonCommittedEntriesInternal(); 1475 1476 // If there was a transient entry, invalidate everything so the new active 1477 // entry state is shown. 1478 if (transient) { 1479 delegate_->NotifyNavigationStateChanged(kInvalidateAll); 1480 } 1481} 1482 1483NavigationEntry* NavigationControllerImpl::GetPendingEntry() const { 1484 return pending_entry_; 1485} 1486 1487int NavigationControllerImpl::GetPendingEntryIndex() const { 1488 return pending_entry_index_; 1489} 1490 1491void NavigationControllerImpl::InsertOrReplaceEntry(NavigationEntryImpl* entry, 1492 bool replace) { 1493 DCHECK(entry->GetTransitionType() != PAGE_TRANSITION_AUTO_SUBFRAME); 1494 1495 // Copy the pending entry's unique ID to the committed entry. 1496 // I don't know if pending_entry_index_ can be other than -1 here. 1497 const NavigationEntryImpl* const pending_entry = 1498 (pending_entry_index_ == -1) ? 1499 pending_entry_ : entries_[pending_entry_index_].get(); 1500 if (pending_entry) 1501 entry->set_unique_id(pending_entry->GetUniqueID()); 1502 1503 DiscardNonCommittedEntriesInternal(); 1504 1505 int current_size = static_cast<int>(entries_.size()); 1506 1507 if (current_size > 0) { 1508 // Prune any entries which are in front of the current entry. 1509 // Also prune the current entry if we are to replace the current entry. 1510 // last_committed_entry_index_ must be updated here since calls to 1511 // NotifyPrunedEntries() below may re-enter and we must make sure 1512 // last_committed_entry_index_ is not left in an invalid state. 1513 if (replace) 1514 --last_committed_entry_index_; 1515 1516 int num_pruned = 0; 1517 while (last_committed_entry_index_ < (current_size - 1)) { 1518 num_pruned++; 1519 entries_.pop_back(); 1520 current_size--; 1521 } 1522 if (num_pruned > 0) // Only notify if we did prune something. 1523 NotifyPrunedEntries(this, false, num_pruned); 1524 } 1525 1526 PruneOldestEntryIfFull(); 1527 1528 entries_.push_back(linked_ptr<NavigationEntryImpl>(entry)); 1529 last_committed_entry_index_ = static_cast<int>(entries_.size()) - 1; 1530 1531 // This is a new page ID, so we need everybody to know about it. 1532 delegate_->UpdateMaxPageID(entry->GetPageID()); 1533} 1534 1535void NavigationControllerImpl::PruneOldestEntryIfFull() { 1536 if (entries_.size() >= max_entry_count()) { 1537 DCHECK_EQ(max_entry_count(), entries_.size()); 1538 DCHECK_GT(last_committed_entry_index_, 0); 1539 RemoveEntryAtIndex(0); 1540 NotifyPrunedEntries(this, true, 1); 1541 } 1542} 1543 1544void NavigationControllerImpl::NavigateToPendingEntry(ReloadType reload_type) { 1545 needs_reload_ = false; 1546 1547 // If we were navigating to a slow-to-commit page, and the user performs 1548 // a session history navigation to the last committed page, RenderViewHost 1549 // will force the throbber to start, but WebKit will essentially ignore the 1550 // navigation, and won't send a message to stop the throbber. To prevent this 1551 // from happening, we drop the navigation here and stop the slow-to-commit 1552 // page from loading (which would normally happen during the navigation). 1553 if (pending_entry_index_ != -1 && 1554 pending_entry_index_ == last_committed_entry_index_ && 1555 (entries_[pending_entry_index_]->restore_type() == 1556 NavigationEntryImpl::RESTORE_NONE) && 1557 (entries_[pending_entry_index_]->GetTransitionType() & 1558 PAGE_TRANSITION_FORWARD_BACK)) { 1559 delegate_->Stop(); 1560 1561 // If an interstitial page is showing, we want to close it to get back 1562 // to what was showing before. 1563 if (delegate_->GetInterstitialPage()) 1564 delegate_->GetInterstitialPage()->DontProceed(); 1565 1566 DiscardNonCommittedEntries(); 1567 return; 1568 } 1569 1570 // If an interstitial page is showing, the previous renderer is blocked and 1571 // cannot make new requests. Unblock (and disable) it to allow this 1572 // navigation to succeed. The interstitial will stay visible until the 1573 // resulting DidNavigate. 1574 if (delegate_->GetInterstitialPage()) { 1575 static_cast<InterstitialPageImpl*>(delegate_->GetInterstitialPage())-> 1576 CancelForNavigation(); 1577 } 1578 1579 // For session history navigations only the pending_entry_index_ is set. 1580 if (!pending_entry_) { 1581 DCHECK_NE(pending_entry_index_, -1); 1582 pending_entry_ = entries_[pending_entry_index_].get(); 1583 } 1584 1585 // This call does not support re-entrancy. See http://crbug.com/347742. 1586 CHECK(!in_navigate_to_pending_entry_); 1587 in_navigate_to_pending_entry_ = true; 1588 bool success = delegate_->NavigateToPendingEntry(reload_type); 1589 in_navigate_to_pending_entry_ = false; 1590 1591 if (!success) 1592 DiscardNonCommittedEntries(); 1593 1594 // If the entry is being restored and doesn't have a SiteInstance yet, fill 1595 // it in now that we know. This allows us to find the entry when it commits. 1596 if (pending_entry_ && !pending_entry_->site_instance() && 1597 pending_entry_->restore_type() != NavigationEntryImpl::RESTORE_NONE) { 1598 pending_entry_->set_site_instance(static_cast<SiteInstanceImpl*>( 1599 delegate_->GetPendingSiteInstance())); 1600 pending_entry_->set_restore_type(NavigationEntryImpl::RESTORE_NONE); 1601 } 1602} 1603 1604void NavigationControllerImpl::NotifyNavigationEntryCommitted( 1605 LoadCommittedDetails* details) { 1606 details->entry = GetLastCommittedEntry(); 1607 1608 // We need to notify the ssl_manager_ before the web_contents_ so the 1609 // location bar will have up-to-date information about the security style 1610 // when it wants to draw. See http://crbug.com/11157 1611 ssl_manager_.DidCommitProvisionalLoad(*details); 1612 1613 delegate_->NotifyNavigationStateChanged(kInvalidateAll); 1614 delegate_->NotifyNavigationEntryCommitted(*details); 1615 1616 // TODO(avi): Remove. http://crbug.com/170921 1617 NotificationDetails notification_details = 1618 Details<LoadCommittedDetails>(details); 1619 NotificationService::current()->Notify( 1620 NOTIFICATION_NAV_ENTRY_COMMITTED, 1621 Source<NavigationController>(this), 1622 notification_details); 1623} 1624 1625// static 1626size_t NavigationControllerImpl::max_entry_count() { 1627 if (max_entry_count_for_testing_ != kMaxEntryCountForTestingNotSet) 1628 return max_entry_count_for_testing_; 1629 return kMaxSessionHistoryEntries; 1630} 1631 1632void NavigationControllerImpl::SetActive(bool is_active) { 1633 if (is_active && needs_reload_) 1634 LoadIfNecessary(); 1635} 1636 1637void NavigationControllerImpl::LoadIfNecessary() { 1638 if (!needs_reload_) 1639 return; 1640 1641 // Calling Reload() results in ignoring state, and not loading. 1642 // Explicitly use NavigateToPendingEntry so that the renderer uses the 1643 // cached state. 1644 pending_entry_index_ = last_committed_entry_index_; 1645 NavigateToPendingEntry(NO_RELOAD); 1646} 1647 1648void NavigationControllerImpl::NotifyEntryChanged(const NavigationEntry* entry, 1649 int index) { 1650 EntryChangedDetails det; 1651 det.changed_entry = entry; 1652 det.index = index; 1653 NotificationService::current()->Notify( 1654 NOTIFICATION_NAV_ENTRY_CHANGED, 1655 Source<NavigationController>(this), 1656 Details<EntryChangedDetails>(&det)); 1657} 1658 1659void NavigationControllerImpl::FinishRestore(int selected_index, 1660 RestoreType type) { 1661 DCHECK(selected_index >= 0 && selected_index < GetEntryCount()); 1662 ConfigureEntriesForRestore(&entries_, type); 1663 1664 SetMaxRestoredPageID(static_cast<int32>(GetEntryCount())); 1665 1666 last_committed_entry_index_ = selected_index; 1667} 1668 1669void NavigationControllerImpl::DiscardNonCommittedEntriesInternal() { 1670 DiscardPendingEntry(); 1671 DiscardTransientEntry(); 1672} 1673 1674void NavigationControllerImpl::DiscardPendingEntry() { 1675 // It is not safe to call DiscardPendingEntry while NavigateToEntry is in 1676 // progress, since this will cause a use-after-free. http://crbug.com/347742. 1677 CHECK(!in_navigate_to_pending_entry_); 1678 1679 if (pending_entry_index_ == -1) 1680 delete pending_entry_; 1681 pending_entry_ = NULL; 1682 pending_entry_index_ = -1; 1683} 1684 1685void NavigationControllerImpl::DiscardTransientEntry() { 1686 if (transient_entry_index_ == -1) 1687 return; 1688 entries_.erase(entries_.begin() + transient_entry_index_); 1689 if (last_committed_entry_index_ > transient_entry_index_) 1690 last_committed_entry_index_--; 1691 transient_entry_index_ = -1; 1692} 1693 1694int NavigationControllerImpl::GetEntryIndexWithPageID( 1695 SiteInstance* instance, int32 page_id) const { 1696 for (int i = static_cast<int>(entries_.size()) - 1; i >= 0; --i) { 1697 if ((entries_[i]->site_instance() == instance) && 1698 (entries_[i]->GetPageID() == page_id)) 1699 return i; 1700 } 1701 return -1; 1702} 1703 1704NavigationEntry* NavigationControllerImpl::GetTransientEntry() const { 1705 if (transient_entry_index_ == -1) 1706 return NULL; 1707 return entries_[transient_entry_index_].get(); 1708} 1709 1710void NavigationControllerImpl::SetTransientEntry(NavigationEntry* entry) { 1711 // Discard any current transient entry, we can only have one at a time. 1712 int index = 0; 1713 if (last_committed_entry_index_ != -1) 1714 index = last_committed_entry_index_ + 1; 1715 DiscardTransientEntry(); 1716 entries_.insert( 1717 entries_.begin() + index, linked_ptr<NavigationEntryImpl>( 1718 NavigationEntryImpl::FromNavigationEntry(entry))); 1719 transient_entry_index_ = index; 1720 delegate_->NotifyNavigationStateChanged(kInvalidateAll); 1721} 1722 1723void NavigationControllerImpl::InsertEntriesFrom( 1724 const NavigationControllerImpl& source, 1725 int max_index) { 1726 DCHECK_LE(max_index, source.GetEntryCount()); 1727 size_t insert_index = 0; 1728 for (int i = 0; i < max_index; i++) { 1729 // When cloning a tab, copy all entries except interstitial pages 1730 if (source.entries_[i].get()->GetPageType() != 1731 PAGE_TYPE_INTERSTITIAL) { 1732 entries_.insert(entries_.begin() + insert_index++, 1733 linked_ptr<NavigationEntryImpl>( 1734 new NavigationEntryImpl(*source.entries_[i]))); 1735 } 1736 } 1737} 1738 1739void NavigationControllerImpl::SetGetTimestampCallbackForTest( 1740 const base::Callback<base::Time()>& get_timestamp_callback) { 1741 get_timestamp_callback_ = get_timestamp_callback; 1742} 1743 1744} // namespace content 1745