blob: f46b5d45b8497bf26c33e07c7037fab83978f2aa [file] [log] [blame]
[email protected]7f070d42011-03-09 20:25:321// Copyright (c) 2011 The Chromium Authors. All rights reserved.
license.botbf09a502008-08-24 00:55:552// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
initial.commit09911bf2008-07-26 23:55:294
[email protected]0dd3a0ab2011-02-18 08:17:445#include "content/browser/tab_contents/navigation_controller.h"
initial.commit09911bf2008-07-26 23:55:296
initial.commit09911bf2008-07-26 23:55:297#include "base/file_util.h"
8#include "base/logging.h"
9#include "base/string_util.h"
[email protected]b689fce72009-03-17 22:45:3410#include "base/time.h"
[email protected]252cad62010-08-18 18:33:5711#include "base/utf_string_conversions.h"
[email protected]3d7474ff2011-07-27 17:47:3712#include "content/browser/browser_context.h"
[email protected]b8148ac2011-07-13 22:03:2513#include "content/browser/browser_url_handler.h"
[email protected]419a0572011-04-18 22:21:4614#include "content/browser/child_process_security_policy.h"
[email protected]567812d2011-02-24 17:40:5015#include "content/browser/in_process_webkit/session_storage_namespace.h"
16#include "content/browser/site_instance.h"
[email protected]0dd3a0ab2011-02-18 08:17:4417#include "content/browser/tab_contents/interstitial_page.h"
[email protected]8286f51a2011-05-31 17:39:1318#include "content/browser/tab_contents/navigation_details.h"
[email protected]0dd3a0ab2011-02-18 08:17:4419#include "content/browser/tab_contents/navigation_entry.h"
20#include "content/browser/tab_contents/tab_contents.h"
21#include "content/browser/tab_contents/tab_contents_delegate.h"
[email protected]485e8232011-07-24 18:03:4622#include "content/browser/user_metrics.h"
[email protected]9966325b2011-04-18 05:00:1023#include "content/common/content_constants.h"
[email protected]4dd57932011-03-17 06:06:1224#include "content/common/navigation_types.h"
[email protected]7f070d42011-03-09 20:25:3225#include "content/common/notification_service.h"
[email protected]0aed2f52011-03-23 18:06:3626#include "content/common/view_messages.h"
[email protected]0d6e9bd2011-10-18 04:29:1627#include "content/public/browser/notification_types.h"
[email protected]a23de8572009-06-03 02:16:3228#include "net/base/escape.h"
[email protected]31682282010-01-15 18:05:1629#include "net/base/mime_util.h"
[email protected]7f070d42011-03-09 20:25:3230#include "net/base/net_util.h"
[email protected]765b35502008-08-21 00:51:2031#include "webkit/glue/webkit_glue.h"
initial.commit09911bf2008-07-26 23:55:2932
[email protected]e9ba4472008-09-14 15:42:4333namespace {
34
[email protected]93f230e02011-06-01 14:40:0035const int kInvalidateAll = 0xFFFFFFFF;
[email protected]8030f012009-09-25 18:09:3736
[email protected]e9ba4472008-09-14 15:42:4337// Invoked when entries have been pruned, or removed. For example, if the
38// current entries are [google, digg, yahoo], with the current entry google,
39// and the user types in cnet, then digg and yahoo are pruned.
[email protected]c12bf1a12008-09-17 16:28:4940void NotifyPrunedEntries(NavigationController* nav_controller,
41 bool from_front,
42 int count) {
[email protected]8286f51a2011-05-31 17:39:1343 content::PrunedDetails details;
[email protected]c12bf1a12008-09-17 16:28:4944 details.from_front = from_front;
45 details.count = count;
[email protected]e9ba4472008-09-14 15:42:4346 NotificationService::current()->Notify(
[email protected]432115822011-07-10 15:52:2747 content::NOTIFICATION_NAV_LIST_PRUNED,
[email protected]e9ba4472008-09-14 15:42:4348 Source<NavigationController>(nav_controller),
[email protected]8286f51a2011-05-31 17:39:1349 Details<content::PrunedDetails>(&details));
[email protected]e9ba4472008-09-14 15:42:4350}
51
52// Ensure the given NavigationEntry has a valid state, so that WebKit does not
53// get confused if we navigate back to it.
[email protected]40bcc302009-03-02 20:50:3954//
[email protected]e9ba4472008-09-14 15:42:4355// An empty state is treated as a new navigation by WebKit, which would mean
56// losing the navigation entries and generating a new navigation entry after
57// this one. We don't want that. To avoid this we create a valid state which
58// WebKit will not treat as a new navigation.
59void SetContentStateIfEmpty(NavigationEntry* entry) {
[email protected]965524b2009-04-04 21:32:4060 if (entry->content_state().empty()) {
[email protected]e9ba4472008-09-14 15:42:4361 entry->set_content_state(
62 webkit_glue::CreateHistoryStateForURL(entry->url()));
63 }
64}
65
66// Configure all the NavigationEntries in entries for restore. This resets
67// the transition type to reload and makes sure the content state isn't empty.
68void ConfigureEntriesForRestore(
[email protected]5e369672009-11-03 23:48:3069 std::vector<linked_ptr<NavigationEntry> >* entries,
70 bool from_last_session) {
[email protected]e9ba4472008-09-14 15:42:4371 for (size_t i = 0; i < entries->size(); ++i) {
72 // Use a transition type of reload so that we don't incorrectly increase
73 // the typed count.
[email protected]2905f742011-10-13 03:51:5874 (*entries)[i]->set_transition_type(content::PAGE_TRANSITION_RELOAD);
[email protected]5e369672009-11-03 23:48:3075 (*entries)[i]->set_restore_type(from_last_session ?
76 NavigationEntry::RESTORE_LAST_SESSION :
77 NavigationEntry::RESTORE_CURRENT_SESSION);
[email protected]e9ba4472008-09-14 15:42:4378 // NOTE(darin): This code is only needed for backwards compat.
79 SetContentStateIfEmpty((*entries)[i].get());
80 }
81}
82
83// See NavigationController::IsURLInPageNavigation for how this works and why.
84bool AreURLsInPageNavigation(const GURL& existing_url, const GURL& new_url) {
[email protected]192d8c5e2010-02-23 07:26:3285 if (existing_url == new_url || !new_url.has_ref()) {
86 // TODO(jcampan): what about when navigating back from a ref URL to the top
87 // non ref URL? Nothing is loaded in that case but we return false here.
88 // The user could also navigate from the ref URL to the non ref URL by
89 // entering the non ref URL in the location bar or through a bookmark, in
90 // which case there would be a load. I am not sure if the non-load/load
91 // scenarios can be differentiated with the TransitionType.
[email protected]e9ba4472008-09-14 15:42:4392 return false;
[email protected]192d8c5e2010-02-23 07:26:3293 }
[email protected]e9ba4472008-09-14 15:42:4394
95 url_canon::Replacements<char> replacements;
96 replacements.ClearRef();
97 return existing_url.ReplaceComponents(replacements) ==
98 new_url.ReplaceComponents(replacements);
99}
100
101} // namespace
102
initial.commit09911bf2008-07-26 23:55:29103// NavigationController ---------------------------------------------------
104
[email protected]765b35502008-08-21 00:51:20105// static
[email protected]3cc72b12010-03-18 23:03:00106size_t NavigationController::max_entry_count_ =
[email protected]9966325b2011-04-18 05:00:10107 content::kMaxSessionHistoryEntries;
[email protected]765b35502008-08-21 00:51:20108
initial.commit09911bf2008-07-26 23:55:29109// static
110bool NavigationController::check_for_repost_ = true;
111
[email protected]6ee12c42010-09-14 09:36:07112NavigationController::NavigationController(
113 TabContents* contents,
[email protected]3d7474ff2011-07-27 17:47:37114 content::BrowserContext* browser_context,
[email protected]6ee12c42010-09-14 09:36:07115 SessionStorageNamespace* session_storage_namespace)
[email protected]3d7474ff2011-07-27 17:47:37116 : browser_context_(browser_context),
[email protected]765b35502008-08-21 00:51:20117 pending_entry_(NULL),
118 last_committed_entry_index_(-1),
119 pending_entry_index_(-1),
[email protected]cbab76d2008-10-13 22:42:47120 transient_entry_index_(-1),
[email protected]9423d9412009-04-14 22:13:55121 tab_contents_(contents),
initial.commit09911bf2008-07-26 23:55:29122 max_restored_page_id_(-1),
[email protected]5d063842009-05-15 04:08:24123 ALLOW_THIS_IN_INITIALIZER_LIST(ssl_manager_(this)),
[email protected]38b8f4e2009-09-24 19:44:57124 needs_reload_(false),
[email protected]6ee12c42010-09-14 09:36:07125 session_storage_namespace_(session_storage_namespace),
[email protected]106a0812010-03-18 00:15:12126 pending_reload_(NO_RELOAD) {
[email protected]3d7474ff2011-07-27 17:47:37127 DCHECK(browser_context_);
[email protected]228d06592011-04-01 20:38:59128 if (!session_storage_namespace_) {
129 session_storage_namespace_ = new SessionStorageNamespace(
[email protected]3d7474ff2011-07-27 17:47:37130 browser_context_->GetWebKitContext());
[email protected]228d06592011-04-01 20:38:59131 }
initial.commit09911bf2008-07-26 23:55:29132}
133
initial.commit09911bf2008-07-26 23:55:29134NavigationController::~NavigationController() {
[email protected]cbab76d2008-10-13 22:42:47135 DiscardNonCommittedEntriesInternal();
[email protected]c0993872008-08-21 19:59:44136
[email protected]bfd04a62009-02-01 18:16:56137 NotificationService::current()->Notify(
[email protected]432115822011-07-10 15:52:27138 content::NOTIFICATION_TAB_CLOSED,
[email protected]bfd04a62009-02-01 18:16:56139 Source<NavigationController>(this),
140 NotificationService::NoDetails());
initial.commit09911bf2008-07-26 23:55:29141}
142
[email protected]03838e22011-06-06 15:27:14143void NavigationController::Restore(
[email protected]5e369672009-11-03 23:48:30144 int selected_navigation,
[email protected]03838e22011-06-06 15:27:14145 bool from_last_session,
146 std::vector<NavigationEntry*>* entries) {
[email protected]ce3fa3c2009-04-20 19:55:57147 // Verify that this controller is unused and that the input is valid.
148 DCHECK(entry_count() == 0 && !pending_entry());
149 DCHECK(selected_navigation >= 0 &&
[email protected]03838e22011-06-06 15:27:14150 selected_navigation < static_cast<int>(entries->size()));
[email protected]ce3fa3c2009-04-20 19:55:57151
[email protected]ce3fa3c2009-04-20 19:55:57152 needs_reload_ = true;
[email protected]03838e22011-06-06 15:27:14153 for (size_t i = 0; i < entries->size(); ++i)
154 entries_.push_back(linked_ptr<NavigationEntry>((*entries)[i]));
155 entries->clear();
[email protected]ce3fa3c2009-04-20 19:55:57156
157 // And finish the restore.
[email protected]5e369672009-11-03 23:48:30158 FinishRestore(selected_navigation, from_last_session);
[email protected]ce3fa3c2009-04-20 19:55:57159}
160
[email protected]f1c74112008-10-30 16:17:04161void NavigationController::Reload(bool check_for_repost) {
[email protected]1ccb3568d2010-02-19 10:51:16162 ReloadInternal(check_for_repost, RELOAD);
163}
164void NavigationController::ReloadIgnoringCache(bool check_for_repost) {
165 ReloadInternal(check_for_repost, RELOAD_IGNORING_CACHE);
166}
167
168void NavigationController::ReloadInternal(bool check_for_repost,
169 ReloadType reload_type) {
[email protected]cbab76d2008-10-13 22:42:47170 // Reloading a transient entry does nothing.
171 if (transient_entry_index_ != -1)
172 return;
173
174 DiscardNonCommittedEntriesInternal();
initial.commit09911bf2008-07-26 23:55:29175 int current_index = GetCurrentEntryIndex();
[email protected]106a0812010-03-18 00:15:12176 // If we are no where, then we can't reload. TODO(darin): We should add a
177 // CanReload method.
178 if (current_index == -1) {
179 return;
180 }
181
[email protected]106a0812010-03-18 00:15:12182 if (check_for_repost_ && check_for_repost &&
[email protected]a3a1d142008-12-19 00:42:30183 GetEntryAtIndex(current_index)->has_post_data()) {
184 // The user is asking to reload a page with POST data. Prompt to make sure
[email protected]b5bb35f2009-02-05 20:17:07185 // they really want to do this. If they do, the dialog will call us back
186 // with check_for_repost = false.
[email protected]965bb092010-04-09 11:59:02187 NotificationService::current()->Notify(
[email protected]432115822011-07-10 15:52:27188 content::NOTIFICATION_REPOST_WARNING_SHOWN,
[email protected]965bb092010-04-09 11:59:02189 Source<NavigationController>(this),
190 NotificationService::NoDetails());
191
[email protected]106a0812010-03-18 00:15:12192 pending_reload_ = reload_type;
[email protected]9423d9412009-04-14 22:13:55193 tab_contents_->Activate();
[email protected]14f3408a2009-08-31 20:53:53194 tab_contents_->delegate()->ShowRepostFormWarningDialog(tab_contents_);
initial.commit09911bf2008-07-26 23:55:29195 } else {
[email protected]cbab76d2008-10-13 22:42:47196 DiscardNonCommittedEntriesInternal();
[email protected]765b35502008-08-21 00:51:20197
198 pending_entry_index_ = current_index;
[email protected]2905f742011-10-13 03:51:58199 entries_[pending_entry_index_]->set_transition_type(
200 content::PAGE_TRANSITION_RELOAD);
[email protected]1ccb3568d2010-02-19 10:51:16201 NavigateToPendingEntry(reload_type);
initial.commit09911bf2008-07-26 23:55:29202 }
203}
204
[email protected]106a0812010-03-18 00:15:12205void NavigationController::CancelPendingReload() {
206 DCHECK(pending_reload_ != NO_RELOAD);
207 pending_reload_ = NO_RELOAD;
208}
209
210void NavigationController::ContinuePendingReload() {
211 if (pending_reload_ == NO_RELOAD) {
212 NOTREACHED();
213 } else {
214 ReloadInternal(false, pending_reload_);
[email protected]965bb092010-04-09 11:59:02215 pending_reload_ = NO_RELOAD;
[email protected]106a0812010-03-18 00:15:12216 }
217}
218
[email protected]c70f9b82010-04-21 07:31:11219bool NavigationController::IsInitialNavigation() {
220 return last_document_loaded_.is_null();
221}
222
[email protected]b6ea7412010-05-04 23:26:47223// static
224NavigationEntry* NavigationController::CreateNavigationEntry(
[email protected]2905f742011-10-13 03:51:58225 const GURL& url, const GURL& referrer, content::PageTransition transition,
[email protected]e47ae9472011-10-13 19:48:34226 bool is_renderer_initiated, const std::string& extra_headers,
[email protected]3d7474ff2011-07-27 17:47:37227 content::BrowserContext* browser_context) {
[email protected]b6ea7412010-05-04 23:26:47228 // Allow the browser URL handler to rewrite the URL. This will, for example,
229 // remove "view-source:" from the beginning of the URL to get the URL that
230 // will actually be loaded. This real URL won't be shown to the user, just
231 // used internally.
232 GURL loaded_url(url);
233 bool reverse_on_redirect = false;
[email protected]f1eb87a2011-05-06 17:49:41234 BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
[email protected]3d7474ff2011-07-27 17:47:37235 &loaded_url, browser_context, &reverse_on_redirect);
[email protected]b6ea7412010-05-04 23:26:47236
237 NavigationEntry* entry = new NavigationEntry(
238 NULL, // The site instance for tabs is sent on navigation
239 // (TabContents::GetSiteInstance).
240 -1,
241 loaded_url,
242 referrer,
[email protected]6b2f7a82011-04-25 19:30:51243 string16(),
[email protected]e47ae9472011-10-13 19:48:34244 transition,
245 is_renderer_initiated);
[email protected]b6ea7412010-05-04 23:26:47246 entry->set_virtual_url(url);
247 entry->set_user_typed_url(url);
248 entry->set_update_virtual_url_with_url(reverse_on_redirect);
[email protected]6c6b02d2011-09-02 03:36:47249 entry->set_extra_headers(extra_headers);
[email protected]b6ea7412010-05-04 23:26:47250 return entry;
251}
252
[email protected]765b35502008-08-21 00:51:20253NavigationEntry* NavigationController::GetEntryWithPageID(
[email protected]7f0005a2009-04-15 03:25:11254 SiteInstance* instance, int32 page_id) const {
255 int index = GetEntryIndexWithPageID(instance, page_id);
[email protected]765b35502008-08-21 00:51:20256 return (index != -1) ? entries_[index].get() : NULL;
257}
258
259void NavigationController::LoadEntry(NavigationEntry* entry) {
[email protected]419a0572011-04-18 22:21:46260 // Don't navigate to URLs disabled by policy. This prevents showing the URL
261 // on the Omnibar when it is also going to be blocked by
262 // ChildProcessSecurityPolicy::CanRequestURL.
263 ChildProcessSecurityPolicy *policy =
264 ChildProcessSecurityPolicy::GetInstance();
265 if (policy->IsDisabledScheme(entry->url().scheme()) ||
266 policy->IsDisabledScheme(entry->virtual_url().scheme())) {
267 VLOG(1) << "URL not loaded because the scheme is blocked by policy: "
268 << entry->url();
269 delete entry;
270 return;
271 }
272
[email protected]765b35502008-08-21 00:51:20273 // When navigating to a new page, we don't know for sure if we will actually
274 // end up leaving the current page. The new page load could for example
275 // result in a download or a 'no content' response (e.g., a mailto: URL).
[email protected]cbab76d2008-10-13 22:42:47276 DiscardNonCommittedEntriesInternal();
[email protected]765b35502008-08-21 00:51:20277 pending_entry_ = entry;
278 NotificationService::current()->Notify(
[email protected]432115822011-07-10 15:52:27279 content::NOTIFICATION_NAV_ENTRY_PENDING,
[email protected]765b35502008-08-21 00:51:20280 Source<NavigationController>(this),
[email protected]6c6b02d2011-09-02 03:36:47281 Details<NavigationEntry>(entry));
[email protected]1ccb3568d2010-02-19 10:51:16282 NavigateToPendingEntry(NO_RELOAD);
[email protected]765b35502008-08-21 00:51:20283}
284
[email protected]765b35502008-08-21 00:51:20285NavigationEntry* NavigationController::GetActiveEntry() const {
[email protected]cbab76d2008-10-13 22:42:47286 if (transient_entry_index_ != -1)
287 return entries_[transient_entry_index_].get();
288 if (pending_entry_)
289 return pending_entry_;
290 return GetLastCommittedEntry();
[email protected]765b35502008-08-21 00:51:20291}
292
[email protected]867e1f92011-08-30 19:01:19293NavigationEntry* NavigationController::GetVisibleEntry() const {
294 if (transient_entry_index_ != -1)
295 return entries_[transient_entry_index_].get();
[email protected]e47ae9472011-10-13 19:48:34296 // Only return the pending_entry for new (non-history), browser-initiated
297 // navigations, in order to prevent URL spoof attacks.
298 // Ideally we would also show the pending entry's URL for new renderer-
299 // initiated navigations with no last committed entry (e.g., a link opening
300 // in a new tab), but an attacker can insert content into the about:blank
301 // page while the pending URL loads in that case.
302 if (pending_entry_ &&
303 pending_entry_->page_id() == -1 &&
304 !pending_entry_->is_renderer_initiated())
[email protected]867e1f92011-08-30 19:01:19305 return pending_entry_;
306 return GetLastCommittedEntry();
307}
308
[email protected]765b35502008-08-21 00:51:20309int NavigationController::GetCurrentEntryIndex() const {
[email protected]cbab76d2008-10-13 22:42:47310 if (transient_entry_index_ != -1)
311 return transient_entry_index_;
[email protected]765b35502008-08-21 00:51:20312 if (pending_entry_index_ != -1)
313 return pending_entry_index_;
314 return last_committed_entry_index_;
315}
316
317NavigationEntry* NavigationController::GetLastCommittedEntry() const {
318 if (last_committed_entry_index_ == -1)
319 return NULL;
320 return entries_[last_committed_entry_index_].get();
321}
322
[email protected]31682282010-01-15 18:05:16323bool NavigationController::CanViewSource() const {
324 bool is_supported_mime_type = net::IsSupportedNonImageMimeType(
325 tab_contents_->contents_mime_type().c_str());
326 NavigationEntry* active_entry = GetActiveEntry();
327 return active_entry && !active_entry->IsViewSourceMode() &&
328 is_supported_mime_type;
329}
330
[email protected]765b35502008-08-21 00:51:20331NavigationEntry* NavigationController::GetEntryAtOffset(int offset) const {
[email protected]cbab76d2008-10-13 22:42:47332 int index = (transient_entry_index_ != -1) ?
333 transient_entry_index_ + offset :
334 last_committed_entry_index_ + offset;
[email protected]7f0005a2009-04-15 03:25:11335 if (index < 0 || index >= entry_count())
[email protected]765b35502008-08-21 00:51:20336 return NULL;
337
338 return entries_[index].get();
339}
340
[email protected]765b35502008-08-21 00:51:20341bool NavigationController::CanGoBack() const {
342 return entries_.size() > 1 && GetCurrentEntryIndex() > 0;
343}
344
345bool NavigationController::CanGoForward() const {
346 int index = GetCurrentEntryIndex();
347 return index >= 0 && index < (static_cast<int>(entries_.size()) - 1);
348}
349
350void NavigationController::GoBack() {
351 if (!CanGoBack()) {
352 NOTREACHED();
353 return;
354 }
355
[email protected]25396da2010-03-11 19:19:10356 // If an interstitial page is showing, going back is equivalent to hiding the
357 // interstitial.
358 if (tab_contents_->interstitial_page()) {
359 tab_contents_->interstitial_page()->DontProceed();
360 return;
361 }
362
[email protected]765b35502008-08-21 00:51:20363 // Base the navigation on where we are now...
364 int current_index = GetCurrentEntryIndex();
365
[email protected]cbab76d2008-10-13 22:42:47366 DiscardNonCommittedEntries();
[email protected]765b35502008-08-21 00:51:20367
368 pending_entry_index_ = current_index - 1;
[email protected]784688a62010-09-13 07:06:52369 entries_[pending_entry_index_]->set_transition_type(
[email protected]2905f742011-10-13 03:51:58370 content::PageTransitionFromInt(
371 entries_[pending_entry_index_]->transition_type() |
372 content::PAGE_TRANSITION_FORWARD_BACK));
[email protected]1ccb3568d2010-02-19 10:51:16373 NavigateToPendingEntry(NO_RELOAD);
[email protected]765b35502008-08-21 00:51:20374}
375
376void NavigationController::GoForward() {
377 if (!CanGoForward()) {
378 NOTREACHED();
379 return;
380 }
381
[email protected]25396da2010-03-11 19:19:10382 // If an interstitial page is showing, the previous renderer is blocked and
383 // cannot make new requests. Unblock (and disable) it to allow this
384 // navigation to succeed. The interstitial will stay visible until the
385 // resulting DidNavigate.
386 if (tab_contents_->interstitial_page()) {
387 tab_contents_->interstitial_page()->CancelForNavigation();
388 }
389
[email protected]cbab76d2008-10-13 22:42:47390 bool transient = (transient_entry_index_ != -1);
391
[email protected]765b35502008-08-21 00:51:20392 // Base the navigation on where we are now...
393 int current_index = GetCurrentEntryIndex();
394
[email protected]cbab76d2008-10-13 22:42:47395 DiscardNonCommittedEntries();
[email protected]765b35502008-08-21 00:51:20396
[email protected]cbab76d2008-10-13 22:42:47397 pending_entry_index_ = current_index;
398 // If there was a transient entry, we removed it making the current index
399 // the next page.
400 if (!transient)
401 pending_entry_index_++;
402
[email protected]784688a62010-09-13 07:06:52403 entries_[pending_entry_index_]->set_transition_type(
[email protected]2905f742011-10-13 03:51:58404 content::PageTransitionFromInt(
405 entries_[pending_entry_index_]->transition_type() |
406 content::PAGE_TRANSITION_FORWARD_BACK));
[email protected]1ccb3568d2010-02-19 10:51:16407 NavigateToPendingEntry(NO_RELOAD);
[email protected]765b35502008-08-21 00:51:20408}
409
410void NavigationController::GoToIndex(int index) {
411 if (index < 0 || index >= static_cast<int>(entries_.size())) {
412 NOTREACHED();
413 return;
414 }
415
[email protected]cbab76d2008-10-13 22:42:47416 if (transient_entry_index_ != -1) {
417 if (index == transient_entry_index_) {
418 // Nothing to do when navigating to the transient.
419 return;
420 }
421 if (index > transient_entry_index_) {
422 // Removing the transient is goint to shift all entries by 1.
423 index--;
424 }
425 }
426
[email protected]25396da2010-03-11 19:19:10427 // If an interstitial page is showing, the previous renderer is blocked and
428 // cannot make new requests.
429 if (tab_contents_->interstitial_page()) {
430 if (index == GetCurrentEntryIndex() - 1) {
431 // Going back one entry is equivalent to hiding the interstitial.
432 tab_contents_->interstitial_page()->DontProceed();
433 return;
434 } else {
435 // Unblock the renderer (and disable the interstitial) to allow this
436 // navigation to succeed. The interstitial will stay visible until the
437 // resulting DidNavigate.
438 tab_contents_->interstitial_page()->CancelForNavigation();
439 }
440 }
441
[email protected]cbab76d2008-10-13 22:42:47442 DiscardNonCommittedEntries();
[email protected]765b35502008-08-21 00:51:20443
444 pending_entry_index_ = index;
[email protected]784688a62010-09-13 07:06:52445 entries_[pending_entry_index_]->set_transition_type(
[email protected]2905f742011-10-13 03:51:58446 content::PageTransitionFromInt(
447 entries_[pending_entry_index_]->transition_type() |
448 content::PAGE_TRANSITION_FORWARD_BACK));
[email protected]1ccb3568d2010-02-19 10:51:16449 NavigateToPendingEntry(NO_RELOAD);
[email protected]765b35502008-08-21 00:51:20450}
451
452void NavigationController::GoToOffset(int offset) {
[email protected]cbab76d2008-10-13 22:42:47453 int index = (transient_entry_index_ != -1) ?
454 transient_entry_index_ + offset :
455 last_committed_entry_index_ + offset;
[email protected]7f0005a2009-04-15 03:25:11456 if (index < 0 || index >= entry_count())
[email protected]765b35502008-08-21 00:51:20457 return;
458
459 GoToIndex(index);
460}
461
[email protected]cbab76d2008-10-13 22:42:47462void NavigationController::RemoveEntryAtIndex(int index,
463 const GURL& default_url) {
[email protected]43032342011-03-21 14:10:31464 bool is_current = index == last_committed_entry_index_;
465 RemoveEntryAtIndexInternal(index);
466 if (is_current) {
[email protected]cbab76d2008-10-13 22:42:47467 // We removed the currently shown entry, so we have to load something else.
468 if (last_committed_entry_index_ != -1) {
469 pending_entry_index_ = last_committed_entry_index_;
[email protected]1ccb3568d2010-02-19 10:51:16470 NavigateToPendingEntry(NO_RELOAD);
[email protected]cbab76d2008-10-13 22:42:47471 } else {
472 // If there is nothing to show, show a default page.
[email protected]ed3456f2009-02-26 20:24:48473 LoadURL(default_url.is_empty() ? GURL("about:blank") : default_url,
[email protected]2905f742011-10-13 03:51:58474 GURL(), content::PAGE_TRANSITION_START_PAGE, std::string());
[email protected]cbab76d2008-10-13 22:42:47475 }
[email protected]cbab76d2008-10-13 22:42:47476 }
[email protected]cbab76d2008-10-13 22:42:47477}
478
[email protected]38178a42009-12-17 18:58:32479void NavigationController::UpdateVirtualURLToURL(
480 NavigationEntry* entry, const GURL& new_url) {
481 GURL new_virtual_url(new_url);
[email protected]f1eb87a2011-05-06 17:49:41482 if (BrowserURLHandler::GetInstance()->ReverseURLRewrite(
[email protected]3d7474ff2011-07-27 17:47:37483 &new_virtual_url, entry->virtual_url(), browser_context_)) {
[email protected]38178a42009-12-17 18:58:32484 entry->set_virtual_url(new_virtual_url);
485 }
486}
487
[email protected]cbab76d2008-10-13 22:42:47488void NavigationController::AddTransientEntry(NavigationEntry* entry) {
489 // Discard any current transient entry, we can only have one at a time.
490 int index = 0;
491 if (last_committed_entry_index_ != -1)
492 index = last_committed_entry_index_ + 1;
493 DiscardTransientEntry();
494 entries_.insert(entries_.begin() + index, linked_ptr<NavigationEntry>(entry));
[email protected]e1cd5452010-08-26 18:03:25495 transient_entry_index_ = index;
[email protected]93f230e02011-06-01 14:40:00496 tab_contents_->NotifyNavigationStateChanged(kInvalidateAll);
[email protected]cbab76d2008-10-13 22:42:47497}
498
[email protected]79046fd2011-09-10 05:48:33499void NavigationController::LoadURL(
[email protected]6c6b02d2011-09-02 03:36:47500 const GURL& url,
501 const GURL& referrer,
[email protected]2905f742011-10-13 03:51:58502 content::PageTransition transition,
[email protected]6c6b02d2011-09-02 03:36:47503 const std::string& extra_headers) {
initial.commit09911bf2008-07-26 23:55:29504 // The user initiated a load, we don't need to reload anymore.
505 needs_reload_ = false;
506
[email protected]b6ea7412010-05-04 23:26:47507 NavigationEntry* entry = CreateNavigationEntry(url, referrer, transition,
[email protected]e47ae9472011-10-13 19:48:34508 false,
509 extra_headers,
510 browser_context_);
511
512 LoadEntry(entry);
513}
514
515void NavigationController::LoadURLFromRenderer(
516 const GURL& url,
517 const GURL& referrer,
518 content::PageTransition transition,
519 const std::string& extra_headers) {
520 // The user initiated a load, we don't need to reload anymore.
521 needs_reload_ = false;
522
523 NavigationEntry* entry = CreateNavigationEntry(url, referrer, transition,
524 true,
[email protected]6c6b02d2011-09-02 03:36:47525 extra_headers,
[email protected]3d7474ff2011-07-27 17:47:37526 browser_context_);
initial.commit09911bf2008-07-26 23:55:29527
528 LoadEntry(entry);
529}
530
[email protected]09b8f82f2009-06-16 20:22:11531void NavigationController::DocumentLoadedInFrame() {
532 last_document_loaded_ = base::TimeTicks::Now();
533}
534
[email protected]e9ba4472008-09-14 15:42:43535bool NavigationController::RendererDidNavigate(
536 const ViewHostMsg_FrameNavigate_Params& params,
[email protected]8286f51a2011-05-31 17:39:13537 content::LoadCommittedDetails* details) {
[email protected]4bf3522c2010-08-19 21:00:20538
[email protected]0e8db942008-09-24 21:21:48539 // Save the previous state before we clobber it.
540 if (GetLastCommittedEntry()) {
[email protected]ecd9d8702008-08-28 22:10:17541 details->previous_url = GetLastCommittedEntry()->url();
[email protected]7f0005a2009-04-15 03:25:11542 details->previous_entry_index = last_committed_entry_index();
[email protected]0e8db942008-09-24 21:21:48543 } else {
544 details->previous_url = GURL();
545 details->previous_entry_index = -1;
546 }
[email protected]ecd9d8702008-08-28 22:10:17547
[email protected]77362eb2011-08-01 17:18:38548 // If we have a pending entry at this point, it should have a SiteInstance.
549 // Restored entries start out with a null SiteInstance, but we should have
550 // assigned one in NavigateToPendingEntry.
551 DCHECK(pending_entry_index_ == -1 || pending_entry_->site_instance());
[email protected]e9ba4472008-09-14 15:42:43552
[email protected]192d8c5e2010-02-23 07:26:32553 // is_in_page must be computed before the entry gets committed.
554 details->is_in_page = IsURLInPageNavigation(params.url);
555
[email protected]e9ba4472008-09-14 15:42:43556 // Do navigation-type specific actions. These will make and commit an entry.
[email protected]0e8db942008-09-24 21:21:48557 details->type = ClassifyNavigation(params);
[email protected]4bf3522c2010-08-19 21:00:20558
[email protected]0e8db942008-09-24 21:21:48559 switch (details->type) {
560 case NavigationType::NEW_PAGE:
[email protected]befd8d822009-07-01 04:51:47561 RendererDidNavigateToNewPage(params, &(details->did_replace_entry));
[email protected]e9ba4472008-09-14 15:42:43562 break;
[email protected]0e8db942008-09-24 21:21:48563 case NavigationType::EXISTING_PAGE:
[email protected]e9ba4472008-09-14 15:42:43564 RendererDidNavigateToExistingPage(params);
565 break;
[email protected]0e8db942008-09-24 21:21:48566 case NavigationType::SAME_PAGE:
[email protected]e9ba4472008-09-14 15:42:43567 RendererDidNavigateToSamePage(params);
568 break;
[email protected]0e8db942008-09-24 21:21:48569 case NavigationType::IN_PAGE:
[email protected]befd8d822009-07-01 04:51:47570 RendererDidNavigateInPage(params, &(details->did_replace_entry));
[email protected]e9ba4472008-09-14 15:42:43571 break;
[email protected]0e8db942008-09-24 21:21:48572 case NavigationType::NEW_SUBFRAME:
[email protected]e9ba4472008-09-14 15:42:43573 RendererDidNavigateNewSubframe(params);
574 break;
[email protected]0e8db942008-09-24 21:21:48575 case NavigationType::AUTO_SUBFRAME:
[email protected]e9ba4472008-09-14 15:42:43576 if (!RendererDidNavigateAutoSubframe(params))
577 return false;
578 break;
[email protected]0e8db942008-09-24 21:21:48579 case NavigationType::NAV_IGNORE:
[email protected]20d1c992011-04-12 21:17:49580 // If a pending navigation was in progress, this canceled it. We should
581 // discard it and make sure it is removed from the URL bar. After that,
582 // there is nothing we can do with this navigation, so we just return to
[email protected]e9ba4472008-09-14 15:42:43583 // the caller that nothing has happened.
[email protected]20d1c992011-04-12 21:17:49584 if (pending_entry_) {
585 DiscardNonCommittedEntries();
[email protected]93f230e02011-06-01 14:40:00586 tab_contents_->NotifyNavigationStateChanged(
587 TabContents::INVALIDATE_URL);
[email protected]20d1c992011-04-12 21:17:49588 }
[email protected]e9ba4472008-09-14 15:42:43589 return false;
590 default:
591 NOTREACHED();
[email protected]765b35502008-08-21 00:51:20592 }
593
[email protected]e9ba4472008-09-14 15:42:43594 // All committed entries should have nonempty content state so WebKit doesn't
595 // get confused when we go back to them (see the function for details).
[email protected]0f38dc4552011-02-25 11:24:00596 DCHECK(!params.content_state.empty());
597 NavigationEntry* active_entry = GetActiveEntry();
598 active_entry->set_content_state(params.content_state);
[email protected]765b35502008-08-21 00:51:20599
[email protected]e47ae9472011-10-13 19:48:34600 // Once committed, we do not need to track if the entry was initiated by
601 // the renderer.
602 active_entry->set_is_renderer_initiated(false);
603
[email protected]49bd30e62011-03-22 20:12:59604 // The active entry's SiteInstance should match our SiteInstance.
605 DCHECK(active_entry->site_instance() == tab_contents_->GetSiteInstance());
606
[email protected]e9ba4472008-09-14 15:42:43607 // Now prep the rest of the details for the notification and broadcast.
[email protected]0f38dc4552011-02-25 11:24:00608 details->entry = active_entry;
[email protected]2905f742011-10-13 03:51:58609 details->is_main_frame =
610 content::PageTransitionIsMainFrame(params.transition);
[email protected]f072d2ce2008-09-17 17:16:24611 details->serialized_security_info = params.security_info;
[email protected]2e39d2e2009-02-19 18:41:31612 details->http_status_code = params.http_status_code;
[email protected]93f230e02011-06-01 14:40:00613 NotifyNavigationEntryCommitted(details);
initial.commit09911bf2008-07-26 23:55:29614
[email protected]e9ba4472008-09-14 15:42:43615 return true;
initial.commit09911bf2008-07-26 23:55:29616}
617
[email protected]0e8db942008-09-24 21:21:48618NavigationType::Type NavigationController::ClassifyNavigation(
[email protected]e9ba4472008-09-14 15:42:43619 const ViewHostMsg_FrameNavigate_Params& params) const {
[email protected]e9ba4472008-09-14 15:42:43620 if (params.page_id == -1) {
[email protected]eef9de32009-09-23 17:19:46621 // The renderer generates the page IDs, and so if it gives us the invalid
622 // page ID (-1) we know it didn't actually navigate. This happens in a few
623 // cases:
624 //
625 // - If a page makes a popup navigated to about blank, and then writes
626 // stuff like a subframe navigated to a real page. We'll get the commit
627 // for the subframe, but there won't be any commit for the outer page.
628 //
629 // - We were also getting these for failed loads (for example, bug 21849).
630 // The guess is that we get a "load commit" for the alternate error page,
631 // but that doesn't affect the page ID, so we get the "old" one, which
632 // could be invalid. This can also happen for a cross-site transition
633 // that causes us to swap processes. Then the error page load will be in
634 // a new process with no page IDs ever assigned (and hence a -1 value),
635 // yet the navigation controller still might have previous pages in its
636 // list.
637 //
638 // In these cases, there's nothing we can do with them, so ignore.
[email protected]0e8db942008-09-24 21:21:48639 return NavigationType::NAV_IGNORE;
[email protected]e9ba4472008-09-14 15:42:43640 }
641
[email protected]9423d9412009-04-14 22:13:55642 if (params.page_id > tab_contents_->GetMaxPageID()) {
[email protected]e9ba4472008-09-14 15:42:43643 // Greater page IDs than we've ever seen before are new pages. We may or may
644 // not have a pending entry for the page, and this may or may not be the
645 // main frame.
[email protected]2905f742011-10-13 03:51:58646 if (content::PageTransitionIsMainFrame(params.transition))
[email protected]0e8db942008-09-24 21:21:48647 return NavigationType::NEW_PAGE;
[email protected]4c27ba82008-09-24 16:49:09648
649 // When this is a new subframe navigation, we should have a committed page
650 // for which it's a suframe in. This may not be the case when an iframe is
651 // navigated on a popup navigated to about:blank (the iframe would be
652 // written into the popup by script on the main page). For these cases,
653 // there isn't any navigation stuff we can do, so just ignore it.
654 if (!GetLastCommittedEntry())
[email protected]0e8db942008-09-24 21:21:48655 return NavigationType::NAV_IGNORE;
[email protected]4c27ba82008-09-24 16:49:09656
657 // Valid subframe navigation.
[email protected]0e8db942008-09-24 21:21:48658 return NavigationType::NEW_SUBFRAME;
[email protected]e9ba4472008-09-14 15:42:43659 }
660
661 // Now we know that the notification is for an existing page. Find that entry.
662 int existing_entry_index = GetEntryIndexWithPageID(
[email protected]9423d9412009-04-14 22:13:55663 tab_contents_->GetSiteInstance(),
[email protected]e9ba4472008-09-14 15:42:43664 params.page_id);
665 if (existing_entry_index == -1) {
666 // The page was not found. It could have been pruned because of the limit on
667 // back/forward entries (not likely since we'll usually tell it to navigate
668 // to such entries). It could also mean that the renderer is smoking crack.
669 NOTREACHED();
[email protected]485e8232011-07-24 18:03:46670
671 // Because the unknown entry has committed, we risk showing the wrong URL in
672 // release builds. Instead, we'll kill the renderer process to be safe.
673 LOG(ERROR) << "terminating renderer for bad navigation: " << params.url;
674 UserMetrics::RecordAction(UserMetricsAction("BadMessageTerminate_NC"));
675 if (tab_contents_->GetSiteInstance()->HasProcess())
676 tab_contents_->GetSiteInstance()->GetProcess()->ReceivedBadMessage();
[email protected]0e8db942008-09-24 21:21:48677 return NavigationType::NAV_IGNORE;
[email protected]e9ba4472008-09-14 15:42:43678 }
679 NavigationEntry* existing_entry = entries_[existing_entry_index].get();
680
[email protected]2905f742011-10-13 03:51:58681 if (!content::PageTransitionIsMainFrame(params.transition)) {
[email protected]e6035c22010-05-25 16:15:52682 // All manual subframes would get new IDs and were handled above, so we
683 // know this is auto. Since the current page was found in the navigation
684 // entry list, we're guaranteed to have a last committed entry.
685 DCHECK(GetLastCommittedEntry());
686 return NavigationType::AUTO_SUBFRAME;
687 }
688
689 // Anything below here we know is a main frame navigation.
[email protected]e9ba4472008-09-14 15:42:43690 if (pending_entry_ &&
[email protected]e9ba4472008-09-14 15:42:43691 existing_entry != pending_entry_ &&
[email protected]230c0012011-04-08 16:27:24692 pending_entry_->page_id() == -1 &&
693 existing_entry == GetLastCommittedEntry()) {
[email protected]e9ba4472008-09-14 15:42:43694 // In this case, we have a pending entry for a URL but WebCore didn't do a
695 // new navigation. This happens when you press enter in the URL bar to
696 // reload. We will create a pending entry, but WebKit will convert it to
697 // a reload since it's the same page and not create a new entry for it
698 // (the user doesn't want to have a new back/forward entry when they do
[email protected]230c0012011-04-08 16:27:24699 // this). If this matches the last committed entry, we want to just ignore
700 // the pending entry and go back to where we were (the "existing entry").
[email protected]0e8db942008-09-24 21:21:48701 return NavigationType::SAME_PAGE;
[email protected]e9ba4472008-09-14 15:42:43702 }
703
[email protected]fc60f222008-12-18 17:36:54704 // Any toplevel navigations with the same base (minus the reference fragment)
705 // are in-page navigations. We weeded out subframe navigations above. Most of
706 // the time this doesn't matter since WebKit doesn't tell us about subframe
707 // navigations that don't actually navigate, but it can happen when there is
708 // an encoding override (it always sends a navigation request).
709 if (AreURLsInPageNavigation(existing_entry->url(), params.url))
710 return NavigationType::IN_PAGE;
711
[email protected]e9ba4472008-09-14 15:42:43712 // Since we weeded out "new" navigations above, we know this is an existing
[email protected]4c27ba82008-09-24 16:49:09713 // (back/forward) navigation.
[email protected]0e8db942008-09-24 21:21:48714 return NavigationType::EXISTING_PAGE;
[email protected]e9ba4472008-09-14 15:42:43715}
716
[email protected]09b8f82f2009-06-16 20:22:11717bool NavigationController::IsRedirect(
718 const ViewHostMsg_FrameNavigate_Params& params) {
719 // For main frame transition, we judge by params.transition.
720 // Otherwise, by params.redirects.
[email protected]2905f742011-10-13 03:51:58721 if (content::PageTransitionIsMainFrame(params.transition)) {
722 return content::PageTransitionIsRedirect(params.transition);
[email protected]09b8f82f2009-06-16 20:22:11723 }
724 return params.redirects.size() > 1;
725}
726
[email protected]e9ba4472008-09-14 15:42:43727void NavigationController::RendererDidNavigateToNewPage(
[email protected]befd8d822009-07-01 04:51:47728 const ViewHostMsg_FrameNavigate_Params& params, bool* did_replace_entry) {
[email protected]e9ba4472008-09-14 15:42:43729 NavigationEntry* new_entry;
[email protected]f1eb87a2011-05-06 17:49:41730 bool update_virtual_url;
[email protected]e9ba4472008-09-14 15:42:43731 if (pending_entry_) {
732 // TODO(brettw) this assumes that the pending entry is appropriate for the
733 // new page that was just loaded. I don't think this is necessarily the
[email protected]49bd30e62011-03-22 20:12:59734 // case! We should have some more tracking to know for sure.
[email protected]e9ba4472008-09-14 15:42:43735 new_entry = new NavigationEntry(*pending_entry_);
736
737 // Don't use the page type from the pending entry. Some interstitial page
738 // may have set the type to interstitial. Once we commit, however, the page
739 // type must always be normal.
[email protected]cccd3762010-11-12 18:40:01740 new_entry->set_page_type(NORMAL_PAGE);
[email protected]f1eb87a2011-05-06 17:49:41741 update_virtual_url = new_entry->update_virtual_url_with_url();
[email protected]e9ba4472008-09-14 15:42:43742 } else {
[email protected]b680ad22009-04-15 23:19:42743 new_entry = new NavigationEntry;
[email protected]f1eb87a2011-05-06 17:49:41744 // When navigating to a new page, give the browser URL handler a chance to
745 // update the virtual URL based on the new URL. For example, this is needed
746 // to show chrome://bookmarks/#1 when the bookmarks webui extension changes
747 // the URL.
748 update_virtual_url = true;
[email protected]e9ba4472008-09-14 15:42:43749 }
750
751 new_entry->set_url(params.url);
[email protected]f1eb87a2011-05-06 17:49:41752 if (update_virtual_url)
[email protected]38178a42009-12-17 18:58:32753 UpdateVirtualURLToURL(new_entry, params.url);
[email protected]740fbda2009-02-18 21:38:08754 new_entry->set_referrer(params.referrer);
[email protected]e9ba4472008-09-14 15:42:43755 new_entry->set_page_id(params.page_id);
756 new_entry->set_transition_type(params.transition);
[email protected]9423d9412009-04-14 22:13:55757 new_entry->set_site_instance(tab_contents_->GetSiteInstance());
[email protected]e9ba4472008-09-14 15:42:43758 new_entry->set_has_post_data(params.is_post);
759
[email protected]befd8d822009-07-01 04:51:47760 InsertOrReplaceEntry(new_entry, *did_replace_entry);
[email protected]e9ba4472008-09-14 15:42:43761}
762
763void NavigationController::RendererDidNavigateToExistingPage(
764 const ViewHostMsg_FrameNavigate_Params& params) {
765 // We should only get here for main frame navigations.
[email protected]2905f742011-10-13 03:51:58766 DCHECK(content::PageTransitionIsMainFrame(params.transition));
[email protected]e9ba4472008-09-14 15:42:43767
768 // This is a back/forward navigation. The existing page for the ID is
[email protected]4c27ba82008-09-24 16:49:09769 // guaranteed to exist by ClassifyNavigation, and we just need to update it
770 // with new information from the renderer.
[email protected]7f0005a2009-04-15 03:25:11771 int entry_index = GetEntryIndexWithPageID(tab_contents_->GetSiteInstance(),
772 params.page_id);
[email protected]e9ba4472008-09-14 15:42:43773 DCHECK(entry_index >= 0 &&
774 entry_index < static_cast<int>(entries_.size()));
775 NavigationEntry* entry = entries_[entry_index].get();
776
777 // The URL may have changed due to redirects. The site instance will normally
778 // be the same except during session restore, when no site instance will be
779 // assigned.
780 entry->set_url(params.url);
[email protected]38178a42009-12-17 18:58:32781 if (entry->update_virtual_url_with_url())
782 UpdateVirtualURLToURL(entry, params.url);
[email protected]e9ba4472008-09-14 15:42:43783 DCHECK(entry->site_instance() == NULL ||
[email protected]9423d9412009-04-14 22:13:55784 entry->site_instance() == tab_contents_->GetSiteInstance());
785 entry->set_site_instance(tab_contents_->GetSiteInstance());
[email protected]e9ba4472008-09-14 15:42:43786
[email protected]d5a49e52010-01-08 03:01:41787 entry->set_has_post_data(params.is_post);
788
[email protected]e9ba4472008-09-14 15:42:43789 // The entry we found in the list might be pending if the user hit
790 // back/forward/reload. This load should commit it (since it's already in the
[email protected]49bd30e62011-03-22 20:12:59791 // list, we can just discard the pending pointer). We should also discard the
792 // pending entry if it corresponds to a different navigation, since that one
793 // is now likely canceled. If it is not canceled, we will treat it as a new
794 // navigation when it arrives, which is also ok.
[email protected]e9ba4472008-09-14 15:42:43795 //
796 // Note that we need to use the "internal" version since we don't want to
797 // actually change any other state, just kill the pointer.
[email protected]49bd30e62011-03-22 20:12:59798 if (pending_entry_)
[email protected]cbab76d2008-10-13 22:42:47799 DiscardNonCommittedEntriesInternal();
[email protected]40bcc302009-03-02 20:50:39800
[email protected]80858db52009-10-15 00:35:18801 // If a transient entry was removed, the indices might have changed, so we
802 // have to query the entry index again.
803 last_committed_entry_index_ =
804 GetEntryIndexWithPageID(tab_contents_->GetSiteInstance(), params.page_id);
[email protected]e9ba4472008-09-14 15:42:43805}
806
807void NavigationController::RendererDidNavigateToSamePage(
808 const ViewHostMsg_FrameNavigate_Params& params) {
809 // This mode implies we have a pending entry that's the same as an existing
[email protected]4c27ba82008-09-24 16:49:09810 // entry for this page ID. This entry is guaranteed to exist by
811 // ClassifyNavigation. All we need to do is update the existing entry.
[email protected]e9ba4472008-09-14 15:42:43812 NavigationEntry* existing_entry = GetEntryWithPageID(
[email protected]9423d9412009-04-14 22:13:55813 tab_contents_->GetSiteInstance(),
[email protected]e9ba4472008-09-14 15:42:43814 params.page_id);
815
816 // We assign the entry's unique ID to be that of the new one. Since this is
817 // always the result of a user action, we want to dismiss infobars, etc. like
818 // a regular user-initiated navigation.
819 existing_entry->set_unique_id(pending_entry_->unique_id());
820
[email protected]a0e69262009-06-03 19:08:48821 // The URL may have changed due to redirects.
[email protected]38178a42009-12-17 18:58:32822 if (existing_entry->update_virtual_url_with_url())
823 UpdateVirtualURLToURL(existing_entry, params.url);
[email protected]a0e69262009-06-03 19:08:48824 existing_entry->set_url(params.url);
825
[email protected]cbab76d2008-10-13 22:42:47826 DiscardNonCommittedEntries();
[email protected]e9ba4472008-09-14 15:42:43827}
828
829void NavigationController::RendererDidNavigateInPage(
[email protected]befd8d822009-07-01 04:51:47830 const ViewHostMsg_FrameNavigate_Params& params, bool* did_replace_entry) {
[email protected]2905f742011-10-13 03:51:58831 DCHECK(content::PageTransitionIsMainFrame(params.transition)) <<
[email protected]e9ba4472008-09-14 15:42:43832 "WebKit should only tell us about in-page navs for the main frame.";
833 // We're guaranteed to have an entry for this one.
834 NavigationEntry* existing_entry = GetEntryWithPageID(
[email protected]9423d9412009-04-14 22:13:55835 tab_contents_->GetSiteInstance(),
[email protected]e9ba4472008-09-14 15:42:43836 params.page_id);
837
838 // Reference fragment navigation. We're guaranteed to have the last_committed
839 // entry and it will be the same page as the new navigation (minus the
[email protected]d466b8a2011-07-15 21:48:03840 // reference fragments, of course). We'll update the URL of the existing
841 // entry without pruning the forward history.
842 existing_entry->set_url(params.url);
843 if (existing_entry->update_virtual_url_with_url())
844 UpdateVirtualURLToURL(existing_entry, params.url);
[email protected]ccbe04e2010-03-17 17:58:43845
846 // This replaces the existing entry since the page ID didn't change.
847 *did_replace_entry = true;
[email protected]d466b8a2011-07-15 21:48:03848
849 if (pending_entry_)
850 DiscardNonCommittedEntriesInternal();
851
852 // If a transient entry was removed, the indices might have changed, so we
853 // have to query the entry index again.
854 last_committed_entry_index_ =
855 GetEntryIndexWithPageID(tab_contents_->GetSiteInstance(), params.page_id);
[email protected]e9ba4472008-09-14 15:42:43856}
857
858void NavigationController::RendererDidNavigateNewSubframe(
859 const ViewHostMsg_FrameNavigate_Params& params) {
[email protected]2905f742011-10-13 03:51:58860 if (content::PageTransitionStripQualifier(params.transition) ==
861 content::PAGE_TRANSITION_AUTO_SUBFRAME) {
[email protected]09b8f82f2009-06-16 20:22:11862 // This is not user-initiated. Ignore.
863 return;
864 }
[email protected]09b8f82f2009-06-16 20:22:11865
[email protected]e9ba4472008-09-14 15:42:43866 // Manual subframe navigations just get the current entry cloned so the user
867 // can go back or forward to it. The actual subframe information will be
868 // stored in the page state for each of those entries. This happens out of
869 // band with the actual navigations.
[email protected]4c27ba82008-09-24 16:49:09870 DCHECK(GetLastCommittedEntry()) << "ClassifyNavigation should guarantee "
871 << "that a last committed entry exists.";
[email protected]e9ba4472008-09-14 15:42:43872 NavigationEntry* new_entry = new NavigationEntry(*GetLastCommittedEntry());
873 new_entry->set_page_id(params.page_id);
[email protected]672eba292009-05-13 13:22:45874 InsertOrReplaceEntry(new_entry, false);
[email protected]e9ba4472008-09-14 15:42:43875}
876
877bool NavigationController::RendererDidNavigateAutoSubframe(
878 const ViewHostMsg_FrameNavigate_Params& params) {
879 // We're guaranteed to have a previously committed entry, and we now need to
880 // handle navigation inside of a subframe in it without creating a new entry.
881 DCHECK(GetLastCommittedEntry());
882
883 // Handle the case where we're navigating back/forward to a previous subframe
884 // navigation entry. This is case "2." in NAV_AUTO_SUBFRAME comment in the
885 // header file. In case "1." this will be a NOP.
886 int entry_index = GetEntryIndexWithPageID(
[email protected]9423d9412009-04-14 22:13:55887 tab_contents_->GetSiteInstance(),
[email protected]e9ba4472008-09-14 15:42:43888 params.page_id);
889 if (entry_index < 0 ||
890 entry_index >= static_cast<int>(entries_.size())) {
891 NOTREACHED();
892 return false;
893 }
894
895 // Update the current navigation entry in case we're going back/forward.
896 if (entry_index != last_committed_entry_index_) {
[email protected]e9ba4472008-09-14 15:42:43897 last_committed_entry_index_ = entry_index;
[email protected]e9ba4472008-09-14 15:42:43898 return true;
899 }
900 return false;
901}
902
[email protected]765b35502008-08-21 00:51:20903int NavigationController::GetIndexOfEntry(
904 const NavigationEntry* entry) const {
905 const NavigationEntries::const_iterator i(std::find(
906 entries_.begin(),
907 entries_.end(),
908 entry));
909 return (i == entries_.end()) ? -1 : static_cast<int>(i - entries_.begin());
910}
911
[email protected]e9ba4472008-09-14 15:42:43912bool NavigationController::IsURLInPageNavigation(const GURL& url) const {
913 NavigationEntry* last_committed = GetLastCommittedEntry();
914 if (!last_committed)
915 return false;
916 return AreURLsInPageNavigation(last_committed->url(), url);
917}
918
[email protected]ce3fa3c2009-04-20 19:55:57919void NavigationController::CopyStateFrom(const NavigationController& source) {
920 // Verify that we look new.
921 DCHECK(entry_count() == 0 && !pending_entry());
922
923 if (source.entry_count() == 0)
924 return; // Nothing new to do.
925
926 needs_reload_ = true;
[email protected]e1cd5452010-08-26 18:03:25927 InsertEntriesFrom(source, source.entry_count());
[email protected]ce3fa3c2009-04-20 19:55:57928
[email protected]6ee12c42010-09-14 09:36:07929 session_storage_namespace_ = source.session_storage_namespace_->Clone();
[email protected]4e6419c2010-01-15 04:50:34930
[email protected]5e369672009-11-03 23:48:30931 FinishRestore(source.last_committed_entry_index_, false);
[email protected]ce3fa3c2009-04-20 19:55:57932}
933
[email protected]5bc95482011-09-03 19:51:13934void NavigationController::CopyStateFromAndPrune(NavigationController* source) {
[email protected]9e1ad4b2011-08-14 16:49:19935 // The SiteInstance and page_id of the last committed entry needs to be
936 // remembered at this point, in case there is only one committed entry
937 // and it is pruned.
938 NavigationEntry* last_committed = GetLastCommittedEntry();
939 SiteInstance* site_instance =
940 last_committed ? last_committed->site_instance() : NULL;
941 int32 minimum_page_id = last_committed ? last_committed->page_id() : -1;
942
[email protected]e1cd5452010-08-26 18:03:25943 // This code is intended for use when the last entry is the active entry.
944 DCHECK((transient_entry_index_ != -1 &&
945 transient_entry_index_ == entry_count() - 1) ||
946 (pending_entry_ && (pending_entry_index_ == -1 ||
947 pending_entry_index_ == entry_count() - 1)) ||
948 (!pending_entry_ && last_committed_entry_index_ == entry_count() - 1));
949
950 // Remove all the entries leaving the active entry.
951 PruneAllButActive();
952
[email protected]47e020a2010-10-15 14:43:37953 // Insert the entries from source. Don't use source->GetCurrentEntryIndex as
[email protected]e1cd5452010-08-26 18:03:25954 // we don't want to copy over the transient entry.
[email protected]47e020a2010-10-15 14:43:37955 int max_source_index = source->pending_entry_index_ != -1 ?
956 source->pending_entry_index_ : source->last_committed_entry_index_;
[email protected]e1cd5452010-08-26 18:03:25957 if (max_source_index == -1)
[email protected]47e020a2010-10-15 14:43:37958 max_source_index = source->entry_count();
[email protected]e1cd5452010-08-26 18:03:25959 else
960 max_source_index++;
[email protected]47e020a2010-10-15 14:43:37961 InsertEntriesFrom(*source, max_source_index);
[email protected]e1cd5452010-08-26 18:03:25962
963 // Adjust indices such that the last entry and pending are at the end now.
964 last_committed_entry_index_ = entry_count() - 1;
965 if (pending_entry_index_ != -1)
966 pending_entry_index_ = entry_count() - 1;
967 if (transient_entry_index_ != -1) {
968 // There's a transient entry. In this case we want the last committed to
969 // point to the previous entry.
970 transient_entry_index_ = entry_count() - 1;
971 if (last_committed_entry_index_ != -1)
972 last_committed_entry_index_--;
973 }
[email protected]796931a92011-08-10 01:32:14974
[email protected]9e1ad4b2011-08-14 16:49:19975 tab_contents_->SetHistoryLengthAndPrune(site_instance,
976 max_source_index,
977 minimum_page_id);
[email protected]e1cd5452010-08-26 18:03:25978}
979
[email protected]97b6c4f2010-09-27 19:31:26980void NavigationController::PruneAllButActive() {
[email protected]97b6c4f2010-09-27 19:31:26981 if (transient_entry_index_ != -1) {
982 // There is a transient entry. Prune up to it.
983 DCHECK_EQ(entry_count() - 1, transient_entry_index_);
[email protected]77d8d622010-12-15 10:30:12984 entries_.erase(entries_.begin(), entries_.begin() + transient_entry_index_);
[email protected]97b6c4f2010-09-27 19:31:26985 transient_entry_index_ = 0;
986 last_committed_entry_index_ = -1;
987 pending_entry_index_ = -1;
988 } else if (!pending_entry_) {
989 // There's no pending entry. Leave the last entry (if there is one).
[email protected]77d8d622010-12-15 10:30:12990 if (!entry_count())
[email protected]97b6c4f2010-09-27 19:31:26991 return;
992
[email protected]77d8d622010-12-15 10:30:12993 DCHECK(last_committed_entry_index_ >= 0);
994 entries_.erase(entries_.begin(),
995 entries_.begin() + last_committed_entry_index_);
996 entries_.erase(entries_.begin() + 1, entries_.end());
[email protected]97b6c4f2010-09-27 19:31:26997 last_committed_entry_index_ = 0;
998 } else if (pending_entry_index_ != -1) {
[email protected]77d8d622010-12-15 10:30:12999 entries_.erase(entries_.begin(), entries_.begin() + pending_entry_index_);
1000 entries_.erase(entries_.begin() + 1, entries_.end());
[email protected]97b6c4f2010-09-27 19:31:261001 pending_entry_index_ = 0;
1002 last_committed_entry_index_ = 0;
[email protected]97b6c4f2010-09-27 19:31:261003 } else {
1004 // There is a pending_entry, but it's not in entries_.
1005 pending_entry_index_ = -1;
1006 last_committed_entry_index_ = -1;
[email protected]77d8d622010-12-15 10:30:121007 entries_.clear();
[email protected]97b6c4f2010-09-27 19:31:261008 }
1009
1010 if (tab_contents_->interstitial_page()) {
1011 // Normally the interstitial page hides itself if the user doesn't proceeed.
1012 // This would result in showing a NavigationEntry we just removed. Set this
1013 // so the interstitial triggers a reload if the user doesn't proceed.
1014 tab_contents_->interstitial_page()->set_reload_on_dont_proceed(true);
1015 }
[email protected]97b6c4f2010-09-27 19:31:261016}
1017
[email protected]43032342011-03-21 14:10:311018void NavigationController::RemoveEntryAtIndexInternal(int index) {
1019 DCHECK(index < entry_count());
1020
1021 DiscardNonCommittedEntries();
1022
1023 entries_.erase(entries_.begin() + index);
1024 if (last_committed_entry_index_ == index)
1025 last_committed_entry_index_--;
1026 else if (last_committed_entry_index_ > index)
1027 last_committed_entry_index_--;
1028}
1029
[email protected]cbab76d2008-10-13 22:42:471030void NavigationController::DiscardNonCommittedEntries() {
1031 bool transient = transient_entry_index_ != -1;
1032 DiscardNonCommittedEntriesInternal();
initial.commit09911bf2008-07-26 23:55:291033
[email protected]cbab76d2008-10-13 22:42:471034 // If there was a transient entry, invalidate everything so the new active
1035 // entry state is shown.
1036 if (transient) {
[email protected]93f230e02011-06-01 14:40:001037 tab_contents_->NotifyNavigationStateChanged(kInvalidateAll);
[email protected]cbab76d2008-10-13 22:42:471038 }
initial.commit09911bf2008-07-26 23:55:291039}
1040
[email protected]672eba292009-05-13 13:22:451041void NavigationController::InsertOrReplaceEntry(NavigationEntry* entry,
1042 bool replace) {
[email protected]2905f742011-10-13 03:51:581043 DCHECK(entry->transition_type() != content::PAGE_TRANSITION_AUTO_SUBFRAME);
[email protected]765b35502008-08-21 00:51:201044
1045 // Copy the pending entry's unique ID to the committed entry.
1046 // I don't know if pending_entry_index_ can be other than -1 here.
1047 const NavigationEntry* const pending_entry = (pending_entry_index_ == -1) ?
1048 pending_entry_ : entries_[pending_entry_index_].get();
1049 if (pending_entry)
1050 entry->set_unique_id(pending_entry->unique_id());
1051
[email protected]cbab76d2008-10-13 22:42:471052 DiscardNonCommittedEntriesInternal();
[email protected]765b35502008-08-21 00:51:201053
1054 int current_size = static_cast<int>(entries_.size());
1055
[email protected]765b35502008-08-21 00:51:201056 if (current_size > 0) {
[email protected]672eba292009-05-13 13:22:451057 // Prune any entries which are in front of the current entry.
1058 // Also prune the current entry if we are to replace the current entry.
[email protected]47dcbdc2011-05-27 15:08:311059 // last_committed_entry_index_ must be updated here since calls to
1060 // NotifyPrunedEntries() below may re-enter and we must make sure
1061 // last_committed_entry_index_ is not left in an invalid state.
1062 if (replace)
1063 --last_committed_entry_index_;
1064
[email protected]c12bf1a12008-09-17 16:28:491065 int num_pruned = 0;
[email protected]47dcbdc2011-05-27 15:08:311066 while (last_committed_entry_index_ < (current_size - 1)) {
[email protected]c12bf1a12008-09-17 16:28:491067 num_pruned++;
[email protected]765b35502008-08-21 00:51:201068 entries_.pop_back();
1069 current_size--;
1070 }
[email protected]c12bf1a12008-09-17 16:28:491071 if (num_pruned > 0) // Only notify if we did prune something.
1072 NotifyPrunedEntries(this, false, num_pruned);
[email protected]765b35502008-08-21 00:51:201073 }
1074
[email protected]c12bf1a12008-09-17 16:28:491075 if (entries_.size() >= max_entry_count_) {
[email protected]cbab76d2008-10-13 22:42:471076 RemoveEntryAtIndex(0, GURL());
[email protected]c12bf1a12008-09-17 16:28:491077 NotifyPrunedEntries(this, true, 1);
1078 }
[email protected]765b35502008-08-21 00:51:201079
1080 entries_.push_back(linked_ptr<NavigationEntry>(entry));
1081 last_committed_entry_index_ = static_cast<int>(entries_.size()) - 1;
[email protected]e9ba4472008-09-14 15:42:431082
1083 // This is a new page ID, so we need everybody to know about it.
[email protected]9423d9412009-04-14 22:13:551084 tab_contents_->UpdateMaxPageID(entry->page_id());
initial.commit09911bf2008-07-26 23:55:291085}
1086
[email protected]1ccb3568d2010-02-19 10:51:161087void NavigationController::NavigateToPendingEntry(ReloadType reload_type) {
[email protected]72097fd02010-01-21 23:36:011088 needs_reload_ = false;
1089
[email protected]83c2e232011-10-07 21:36:461090 // If we were navigating to a slow-to-commit page, and the user performs
1091 // a session history navigation to the last committed page, RenderViewHost
1092 // will force the throbber to start, but WebKit will essentially ignore the
1093 // navigation, and won't send a message to stop the throbber. To prevent this
1094 // from happening, we drop the navigation here and stop the slow-to-commit
1095 // page from loading (which would normally happen during the navigation).
1096 if (pending_entry_index_ != -1 &&
1097 pending_entry_index_ == last_committed_entry_index_ &&
1098 (entries_[pending_entry_index_]->restore_type() ==
1099 NavigationEntry::RESTORE_NONE) &&
1100 (entries_[pending_entry_index_]->transition_type() &
[email protected]2905f742011-10-13 03:51:581101 content::PAGE_TRANSITION_FORWARD_BACK)) {
[email protected]83c2e232011-10-07 21:36:461102 tab_contents_->Stop();
1103 DiscardNonCommittedEntries();
1104 return;
1105 }
1106
initial.commit09911bf2008-07-26 23:55:291107 // For session history navigations only the pending_entry_index_ is set.
1108 if (!pending_entry_) {
[email protected]4bf3522c2010-08-19 21:00:201109 DCHECK_NE(pending_entry_index_, -1);
[email protected]765b35502008-08-21 00:51:201110 pending_entry_ = entries_[pending_entry_index_].get();
initial.commit09911bf2008-07-26 23:55:291111 }
1112
[email protected]1ccb3568d2010-02-19 10:51:161113 if (!tab_contents_->NavigateToPendingEntry(reload_type))
[email protected]cbab76d2008-10-13 22:42:471114 DiscardNonCommittedEntries();
[email protected]77362eb2011-08-01 17:18:381115
1116 // If the entry is being restored and doesn't have a SiteInstance yet, fill
1117 // it in now that we know. This allows us to find the entry when it commits.
1118 // This works for browser-initiated navigations. We handle renderer-initiated
1119 // navigations to restored entries in TabContents::OnGoToEntryAtOffset.
1120 if (pending_entry_ && !pending_entry_->site_instance() &&
1121 pending_entry_->restore_type() != NavigationEntry::RESTORE_NONE) {
1122 pending_entry_->set_site_instance(tab_contents_->GetPendingSiteInstance());
1123 pending_entry_->set_restore_type(NavigationEntry::RESTORE_NONE);
1124 }
initial.commit09911bf2008-07-26 23:55:291125}
1126
[email protected]ecd9d8702008-08-28 22:10:171127void NavigationController::NotifyNavigationEntryCommitted(
[email protected]93f230e02011-06-01 14:40:001128 content::LoadCommittedDetails* details) {
[email protected]df1af242009-05-01 00:11:401129 details->entry = GetActiveEntry();
1130 NotificationDetails notification_details =
[email protected]8286f51a2011-05-31 17:39:131131 Details<content::LoadCommittedDetails>(details);
[email protected]df1af242009-05-01 00:11:401132
1133 // We need to notify the ssl_manager_ before the tab_contents_ so the
1134 // location bar will have up-to-date information about the security style
1135 // when it wants to draw. See http://crbug.com/11157
1136 ssl_manager_.DidCommitProvisionalLoad(notification_details);
1137
initial.commit09911bf2008-07-26 23:55:291138 // TODO(pkasting): http://b/1113079 Probably these explicit notification paths
1139 // should be removed, and interested parties should just listen for the
1140 // notification below instead.
[email protected]93f230e02011-06-01 14:40:001141 tab_contents_->NotifyNavigationStateChanged(kInvalidateAll);
initial.commit09911bf2008-07-26 23:55:291142
[email protected]ecd9d8702008-08-28 22:10:171143 NotificationService::current()->Notify(
[email protected]432115822011-07-10 15:52:271144 content::NOTIFICATION_NAV_ENTRY_COMMITTED,
[email protected]ecd9d8702008-08-28 22:10:171145 Source<NavigationController>(this),
[email protected]df1af242009-05-01 00:11:401146 notification_details);
initial.commit09911bf2008-07-26 23:55:291147}
1148
initial.commit09911bf2008-07-26 23:55:291149// static
1150void NavigationController::DisablePromptOnRepost() {
1151 check_for_repost_ = false;
1152}
1153
1154void NavigationController::SetActive(bool is_active) {
[email protected]ee613922009-09-02 20:38:221155 if (is_active && needs_reload_)
1156 LoadIfNecessary();
initial.commit09911bf2008-07-26 23:55:291157}
1158
1159void NavigationController::LoadIfNecessary() {
1160 if (!needs_reload_)
1161 return;
1162
initial.commit09911bf2008-07-26 23:55:291163 // Calling Reload() results in ignoring state, and not loading.
1164 // Explicitly use NavigateToPendingEntry so that the renderer uses the
1165 // cached state.
1166 pending_entry_index_ = last_committed_entry_index_;
[email protected]1ccb3568d2010-02-19 10:51:161167 NavigateToPendingEntry(NO_RELOAD);
initial.commit09911bf2008-07-26 23:55:291168}
1169
[email protected]534e54b2008-08-13 15:40:091170void NavigationController::NotifyEntryChanged(const NavigationEntry* entry,
1171 int index) {
[email protected]8286f51a2011-05-31 17:39:131172 content::EntryChangedDetails det;
[email protected]534e54b2008-08-13 15:40:091173 det.changed_entry = entry;
1174 det.index = index;
[email protected]432115822011-07-10 15:52:271175 NotificationService::current()->Notify(
1176 content::NOTIFICATION_NAV_ENTRY_CHANGED,
[email protected]8286f51a2011-05-31 17:39:131177 Source<NavigationController>(this),
1178 Details<content::EntryChangedDetails>(&det));
initial.commit09911bf2008-07-26 23:55:291179}
1180
[email protected]5e369672009-11-03 23:48:301181void NavigationController::FinishRestore(int selected_index,
1182 bool from_last_session) {
[email protected]7f0005a2009-04-15 03:25:111183 DCHECK(selected_index >= 0 && selected_index < entry_count());
[email protected]5e369672009-11-03 23:48:301184 ConfigureEntriesForRestore(&entries_, from_last_session);
initial.commit09911bf2008-07-26 23:55:291185
[email protected]61398152010-08-26 21:45:341186 set_max_restored_page_id(static_cast<int32>(entry_count()));
initial.commit09911bf2008-07-26 23:55:291187
1188 last_committed_entry_index_ = selected_index;
initial.commit09911bf2008-07-26 23:55:291189}
[email protected]765b35502008-08-21 00:51:201190
[email protected]cbab76d2008-10-13 22:42:471191void NavigationController::DiscardNonCommittedEntriesInternal() {
[email protected]765b35502008-08-21 00:51:201192 if (pending_entry_index_ == -1)
1193 delete pending_entry_;
1194 pending_entry_ = NULL;
1195 pending_entry_index_ = -1;
[email protected]cbab76d2008-10-13 22:42:471196
1197 DiscardTransientEntry();
1198}
1199
1200void NavigationController::DiscardTransientEntry() {
1201 if (transient_entry_index_ == -1)
1202 return;
[email protected]a0e69262009-06-03 19:08:481203 entries_.erase(entries_.begin() + transient_entry_index_);
[email protected]80858db52009-10-15 00:35:181204 if (last_committed_entry_index_ > transient_entry_index_)
1205 last_committed_entry_index_--;
[email protected]cbab76d2008-10-13 22:42:471206 transient_entry_index_ = -1;
[email protected]765b35502008-08-21 00:51:201207}
1208
1209int NavigationController::GetEntryIndexWithPageID(
[email protected]7f0005a2009-04-15 03:25:111210 SiteInstance* instance, int32 page_id) const {
[email protected]765b35502008-08-21 00:51:201211 for (int i = static_cast<int>(entries_.size()) - 1; i >= 0; --i) {
[email protected]7f0005a2009-04-15 03:25:111212 if ((entries_[i]->site_instance() == instance) &&
[email protected]1e5645ff2008-08-27 18:09:071213 (entries_[i]->page_id() == page_id))
[email protected]765b35502008-08-21 00:51:201214 return i;
1215 }
1216 return -1;
1217}
[email protected]cbab76d2008-10-13 22:42:471218
1219NavigationEntry* NavigationController::GetTransientEntry() const {
1220 if (transient_entry_index_ == -1)
1221 return NULL;
1222 return entries_[transient_entry_index_].get();
1223}
[email protected]e1cd5452010-08-26 18:03:251224
[email protected]e1cd5452010-08-26 18:03:251225void NavigationController::InsertEntriesFrom(
1226 const NavigationController& source,
1227 int max_index) {
1228 DCHECK_LE(max_index, source.entry_count());
1229 size_t insert_index = 0;
1230 for (int i = 0; i < max_index; i++) {
1231 // When cloning a tab, copy all entries except interstitial pages
[email protected]cccd3762010-11-12 18:40:011232 if (source.entries_[i].get()->page_type() != INTERSTITIAL_PAGE) {
[email protected]e1cd5452010-08-26 18:03:251233 entries_.insert(entries_.begin() + insert_index++,
1234 linked_ptr<NavigationEntry>(
1235 new NavigationEntry(*source.entries_[i])));
1236 }
1237 }
1238}