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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/tab_restore_service.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/navigation_controller.h"
#include "chrome/browser/navigation_entry.h"
using base::Time;
// HistoricalTab --------------------------------------------------------------
// ID of the next HistoricalTab.
static int next_historical_tab_id = 1;
TabRestoreService::HistoricalTab::HistoricalTab()
: close_time(Time::Now()),
from_last_session(false),
current_navigation_index(-1),
id(next_historical_tab_id++) {
}
// TabRestoreService ----------------------------------------------------------
// Max number of tabs we'll keep around.
static const size_t kMaxTabs = 10;
// Amount of time from when the session starts and when we'll allow loading of
// the last sessions tabs.
static const int kLoadFromLastSessionMS = 600000;
TabRestoreService::TabRestoreService(Profile* profile)
: profile_(profile),
loaded_last_session_(false) {
}
TabRestoreService::~TabRestoreService() {
FOR_EACH_OBSERVER(Observer, observer_list_, TabRestoreServiceDestroyed(this));
}
void TabRestoreService::AddObserver(Observer* observer) {
observer_list_.AddObserver(observer);
}
void TabRestoreService::RemoveObserver(Observer* observer) {
observer_list_.RemoveObserver(observer);
}
void TabRestoreService::LoadPreviousSessionTabs() {
if (!WillLoadPreviousSessionTabs() || IsLoadingPreviousSessionTabs())
return;
profile_->GetSessionService()->GetLastSession(
&cancelable_consumer_,
NewCallback(this, &TabRestoreService::OnGotLastSession));
}
bool TabRestoreService::IsLoadingPreviousSessionTabs() {
return cancelable_consumer_.HasPendingRequests();
}
bool TabRestoreService::WillLoadPreviousSessionTabs() {
return (!loaded_last_session_ && tabs_.size() < kMaxTabs &&
(Time::Now() - profile_->GetStartTime()).InMilliseconds() <
kLoadFromLastSessionMS);
}
void TabRestoreService::CreateHistoricalTab(NavigationController* tab) {
tabs_.push_front(HistoricalTab());
PopulateTabFromController(tab, &(tabs_.front()));
while (tabs_.size() > kMaxTabs)
tabs_.pop_back();
NotifyTabsChanged();
}
void TabRestoreService::RemoveHistoricalTabById(int id) {
for (Tabs::iterator i = tabs_.begin(); i != tabs_.end(); ++i) {
if (i->id == id) {
tabs_.erase(i);
NotifyTabsChanged();
return;
}
}
// Don't hoark here, we allow an invalid id.
}
void TabRestoreService::ClearHistoricalTabs() {
tabs_.clear();
NotifyTabsChanged();
}
void TabRestoreService::OnGotLastSession(SessionService::Handle handle,
std::vector<SessionWindow*>* windows) {
DCHECK(!loaded_last_session_);
loaded_last_session_ = true;
if (tabs_.size() == kMaxTabs)
return;
AddHistoricalTabs(windows);
NotifyTabsChanged();
}
void TabRestoreService::AddHistoricalTabs(
std::vector<SessionWindow*>* windows) {
// First pass, extract the selected tabs in each window.
for (size_t i = 0; i < windows->size(); ++i) {
SessionWindow* window = (*windows)[i];
if (window->type == BrowserType::TABBED_BROWSER) {
DCHECK(window->selected_tab_index >= 0 &&
window->selected_tab_index <
static_cast<int>(window->tabs.size()));
AppendHistoricalTabFromSessionTab(
window->tabs[window->selected_tab_index]);
if (tabs_.size() == kMaxTabs)
return;
}
}
// Second pass, extract the non-selected tabs.
for (size_t window_index = 0; window_index < windows->size();
++window_index) {
SessionWindow* window = (*windows)[window_index];
if (window->type != BrowserType::TABBED_BROWSER)
continue; // Ignore popups.
for (size_t tab_index = 0; tab_index < window->tabs.size(); ++tab_index) {
if (tab_index == window->selected_tab_index)
continue; // Pass one took care of this tab.
AppendHistoricalTabFromSessionTab(window->tabs[tab_index]);
if (tabs_.size() == kMaxTabs)
return;
}
}
}
void TabRestoreService::AppendHistoricalTabFromSessionTab(
SessionTab* tab) {
tabs_.push_back(HistoricalTab());
PopulateTabFromSessionTab(tab, &(tabs_.back()));
}
void TabRestoreService::PopulateTabFromController(
NavigationController* controller,
HistoricalTab* tab) {
const int pending_index = controller->GetPendingEntryIndex();
int entry_count = controller->GetEntryCount();
if (entry_count == 0 && pending_index == 0)
entry_count++;
tab->navigations.resize(static_cast<int>(entry_count));
for (int i = 0; i < entry_count; ++i) {
NavigationEntry* entry = (i == pending_index) ?
controller->GetPendingEntry() : controller->GetEntryAtIndex(i);
TabNavigation& tab_nav = tab->navigations[i];
tab_nav.url = entry->display_url();
tab_nav.referrer = entry->referrer();
tab_nav.title = entry->title();
tab_nav.state = entry->content_state();
tab_nav.transition = entry->transition_type();
tab_nav.type_mask = entry->has_post_data() ?
TabNavigation::HAS_POST_DATA : 0;
}
tab->current_navigation_index = controller->GetCurrentEntryIndex();
if (tab->current_navigation_index == -1 && entry_count > 0)
tab->current_navigation_index = 0;
}
void TabRestoreService::PopulateTabFromSessionTab(
SessionTab* session_tab,
HistoricalTab* tab) {
tab->navigations.swap(session_tab->navigations);
tab->from_last_session = true;
tab->current_navigation_index = session_tab->current_navigation_index;
}
void TabRestoreService::NotifyTabsChanged() {
FOR_EACH_OBSERVER(Observer, observer_list_, TabRestoreServiceChanged(this));
}
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