Revamp TabNavigation class

chrome/browser/sessions/session_types.cc

 // Copyright (c) 2012 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/sessions/session_types.h"
 
+#include "base/basictypes.h"
+#include "base/pickle.h"
+#include "base/stl_util.h"
 #include "base/string_util.h"
-#include "chrome/browser/profiles/profile.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/sessions/session_command.h"
 #include "chrome/browser/ui/browser.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
+#include "sync/util/time.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebReferrerPolicy.h"
+#include "webkit/glue/webkit_glue.h"
 
 using content::NavigationEntry;
 
 // TabNavigation --------------------------------------------------------------
 
 TabNavigation::TabNavigation()
-    : transition_(content::PAGE_TRANSITION_TYPED),
-      type_mask_(0),
+    : index_(-1),
+      unique_id_(0),
+      transition_type_(content::PAGE_TRANSITION_TYPED),
+      has_post_data_(false),
       post_id_(-1),
-      index_(-1),
-      is_overriding_user_agent_(false) {
-}
-
-TabNavigation::TabNavigation(int index,
-                             const GURL& virtual_url,
-                             const content::Referrer& referrer,
-                             const string16& title,
-                             const std::string& state,
-                             content::PageTransition transition)
-    : virtual_url_(virtual_url),
-      referrer_(referrer),
-      title_(title),
-      state_(state),
-      transition_(transition),
-      type_mask_(0),
-      post_id_(-1),
-      index_(index),
-      is_overriding_user_agent_(false) {
-}
-
-TabNavigation::TabNavigation(const TabNavigation& tab)
-    : virtual_url_(tab.virtual_url_),
-      referrer_(tab.referrer_),
-      title_(tab.title_),
-      state_(tab.state_),
-      transition_(tab.transition_),
-      type_mask_(tab.type_mask_),
-      post_id_(-1),
-      index_(tab.index_),
-      original_request_url_(tab.original_request_url_),
-      is_overriding_user_agent_(tab.is_overriding_user_agent_) {
-}
-
-TabNavigation::~TabNavigation() {
-}
-
-TabNavigation& TabNavigation::operator=(const TabNavigation& tab) {
-  virtual_url_ = tab.virtual_url_;
-  referrer_ = tab.referrer_;
-  title_ = tab.title_;
-  state_ = tab.state_;
-  transition_ = tab.transition_;
-  type_mask_ = tab.type_mask_;
-  post_id_ = tab.post_id_;
-  index_ = tab.index_;
-  original_request_url_ = tab.original_request_url_;
-  is_overriding_user_agent_ = tab.is_overriding_user_agent_;
-  return *this;
-}
+      is_overriding_user_agent_(false) {}
+
+TabNavigation::~TabNavigation() {}
 
 // static
-NavigationEntry* TabNavigation::ToNavigationEntry(
-    int page_id, Profile *profile) const {
-  NavigationEntry* entry = content::NavigationController::CreateNavigationEntry(
-      virtual_url_,
-      referrer_,
-      // Use a transition type of reload so that we don't incorrectly
-      // increase the typed count.
-      content::PAGE_TRANSITION_RELOAD,
-      false,
-      // The extra headers are not sync'ed across sessions.
-      std::string(),
-      profile);
-
+TabNavigation TabNavigation::FromNavigationEntry(
+    int index,
+    const NavigationEntry& entry,
+    base::Time timestamp) {
+  TabNavigation navigation;
+  navigation.index_ = index;
+  navigation.unique_id_ = entry.GetUniqueID();
+  navigation.referrer_ = entry.GetReferrer();
+  navigation.virtual_url_ = entry.GetVirtualURL();
+  navigation.title_ = entry.GetTitle();
+  navigation.content_state_ = entry.GetContentState();
+  navigation.transition_type_ = entry.GetTransitionType();
+  navigation.has_post_data_ = entry.GetHasPostData();
+  navigation.post_id_ = entry.GetPostID();
+  navigation.original_request_url_ = entry.GetOriginalRequestURL();
+  navigation.is_overriding_user_agent_ = entry.GetIsOverridingUserAgent();
+  navigation.timestamp_ = timestamp;
+  return navigation;
+}
+
+TabNavigation TabNavigation::FromSyncData(
+    int index,
+    const sync_pb::TabNavigation& specifics) {
+  TabNavigation navigation;
+  navigation.index_ = index;
+  if (specifics.has_unique_id()) {
+    navigation.unique_id_ = specifics.unique_id();
+  }
+  if (specifics.has_referrer()) {
+    navigation.referrer_ =
+        content::Referrer(GURL(specifics.referrer()),
+                          WebKit::WebReferrerPolicyDefault);
+  }
+  if (specifics.has_virtual_url())
+    navigation.virtual_url_ = GURL(specifics.virtual_url());
+  if (specifics.has_title())
+    navigation.title_ = UTF8ToUTF16(specifics.title());
+  if (specifics.has_state())
+    navigation.content_state_ = specifics.state();
+  navigation.transition_type_ = content::PAGE_TRANSITION_LINK;
+  if (specifics.has_page_transition() ||
+      specifics.has_navigation_qualifier()) {
+    switch (specifics.page_transition()) {
+      case sync_pb::SyncEnums_PageTransition_LINK:
+        navigation.transition_type_ = content::PAGE_TRANSITION_LINK;
+        break;
+      case sync_pb::SyncEnums_PageTransition_TYPED:
+        navigation.transition_type_ = content::PAGE_TRANSITION_TYPED;
+        break;
+      case sync_pb::SyncEnums_PageTransition_AUTO_BOOKMARK:
+        navigation.transition_type_ = content::PAGE_TRANSITION_AUTO_BOOKMARK;
+        break;
+      case sync_pb::SyncEnums_PageTransition_AUTO_SUBFRAME:
+        navigation.transition_type_ = content::PAGE_TRANSITION_AUTO_SUBFRAME;
+        break;
+      case sync_pb::SyncEnums_PageTransition_MANUAL_SUBFRAME:
+        navigation.transition_type_ = content::PAGE_TRANSITION_MANUAL_SUBFRAME;
+        break;
+      case sync_pb::SyncEnums_PageTransition_GENERATED:
+        navigation.transition_type_ = content::PAGE_TRANSITION_GENERATED;
+        break;
+      case sync_pb::SyncEnums_PageTransition_AUTO_TOPLEVEL:
+        navigation.transition_type_ = content::PAGE_TRANSITION_AUTO_TOPLEVEL;
+        break;
+      case sync_pb::SyncEnums_PageTransition_FORM_SUBMIT:
+        navigation.transition_type_ = content::PAGE_TRANSITION_FORM_SUBMIT;
+        break;
+      case sync_pb::SyncEnums_PageTransition_RELOAD:
+        navigation.transition_type_ = content::PAGE_TRANSITION_RELOAD;
+        break;
+      case sync_pb::SyncEnums_PageTransition_KEYWORD:
+        navigation.transition_type_ = content::PAGE_TRANSITION_KEYWORD;
+        break;
+      case sync_pb::SyncEnums_PageTransition_KEYWORD_GENERATED:
+        navigation.transition_type_ =
+            content::PAGE_TRANSITION_KEYWORD_GENERATED;
+        break;
+      case sync_pb::SyncEnums_PageTransition_CHAIN_START:
+        navigation.transition_type_ = content::PAGE_TRANSITION_CHAIN_START;
+        break;
+      case sync_pb::SyncEnums_PageTransition_CHAIN_END:
+        navigation.transition_type_ = content::PAGE_TRANSITION_CHAIN_END;
+        break;
+      default:
+        switch (specifics.navigation_qualifier()) {
+          case sync_pb::SyncEnums_PageTransitionQualifier_CLIENT_REDIRECT:
+            navigation.transition_type_ =
+                content::PAGE_TRANSITION_CLIENT_REDIRECT;
+            break;
+            case sync_pb::SyncEnums_PageTransitionQualifier_SERVER_REDIRECT:
+            navigation.transition_type_ =
+                content::PAGE_TRANSITION_SERVER_REDIRECT;
+              break;
+            default:
+            navigation.transition_type_ = content::PAGE_TRANSITION_TYPED;
+        }
+    }
+  }
+  if (specifics.has_timestamp()) {
+    navigation.timestamp_ = syncer::ProtoTimeToTime(specifics.timestamp());
+  }
+  return navigation;
+}
+
+namespace {
+
+// Helper used by TabNavigation::WriteToPickle(). It writes |str| to
+// |pickle|, if and only if |str| fits within (|max_bytes| -
+// |*bytes_written|).  |bytes_written| is incremented to reflect the
+// data written.
+//
+// TODO(akalin): Unify this with the same function in
+// base_session_service.cc.
+void WriteStringToPickle(Pickle* pickle,
+                         int* bytes_written,
+                         int max_bytes,
+                         const std::string& str) {
+  int num_bytes = str.size() * sizeof(char);
+  if (*bytes_written + num_bytes < max_bytes) {
+    *bytes_written += num_bytes;
+    pickle->WriteString(str);
+  } else {
+    pickle->WriteString(std::string());
+  }
+}
+
+// string16 version of WriteStringToPickle.
+//
+// TODO(akalin): Unify this, too.
+void WriteString16ToPickle(Pickle* pickle,
+                           int* bytes_written,
+                           int max_bytes,
+                           const string16& str) {
+  int num_bytes = str.size() * sizeof(char16);
+  if (*bytes_written + num_bytes < max_bytes) {
+    *bytes_written += num_bytes;
+    pickle->WriteString16(str);
+  } else {
+    pickle->WriteString16(string16());
+  }
+}
+
+// A mask used for arbitrary boolean values needed to represent a
+// NavigationEntry. Currently only contains HAS_POST_DATA.
+//
+// NOTE(akalin): We may want to just serialize |has_post_data_|
+// directly.  Other bools (|is_overriding_user_agent_|) haven't been
+// added to this mask.
+enum TypeMask {
+  HAS_POST_DATA = 1
+};
+
+}  // namespace
+
+// Pickle order:
+//
+// index_
+// virtual_url_
+// title_
+// content_state_
+// transition_type_
+//
+// Added on later:
+//
+// type_mask (has_post_data_)
+// referrer_
+// original_request_url_
+// is_overriding_user_agent_
+
+void TabNavigation::WriteToPickle(Pickle* pickle) const {
+  pickle->WriteInt(index_);
+
+  // We only allow navigations up to 63k (which should be completely
+  // reasonable). On the off chance we get one that is too big, try to
+  // keep the url.
+
+  // Bound the string data (which is variable length) to
+  // |max_state_size bytes| bytes.
+  static const size_t max_state_size =
+      std::numeric_limits<SessionCommand::size_type>::max() - 1024;
+  int bytes_written = 0;
+
+  WriteStringToPickle(pickle, &bytes_written, max_state_size,
+                      virtual_url_.spec());
+
+  WriteString16ToPickle(pickle, &bytes_written, max_state_size, title_);
+
+  std::string content_state = content_state_;
+  if (has_post_data_) {
+    content_state =
+        webkit_glue::RemovePasswordDataFromHistoryState(content_state);
+  }
+  WriteStringToPickle(pickle, &bytes_written, max_state_size, content_state);
+
+  pickle->WriteInt(transition_type_);
+
+  const int type_mask = has_post_data_ ? HAS_POST_DATA : 0;
+  pickle->WriteInt(type_mask);
+
+  WriteStringToPickle(
+      pickle, &bytes_written, max_state_size,
+      referrer_.url.is_valid() ? referrer_.url.spec() : std::string());
+
+  pickle->WriteInt(referrer_.policy);
+
+  // Save info required to override the user agent.
+  WriteStringToPickle(
+      pickle, &bytes_written, max_state_size,
+      original_request_url_.is_valid() ?
+      original_request_url_.spec() : std::string());
+  pickle->WriteBool(is_overriding_user_agent_);
+
+  // TODO(akalin): Persist timestamp.
+}
+
+bool TabNavigation::ReadFromPickle(PickleIterator* iterator) {
+  *this = TabNavigation();
+  std::string virtual_url_spec;
+  int transition_type_int = 0;
+  if (!iterator->ReadInt(&index_) ||
+      !iterator->ReadString(&virtual_url_spec) ||
+      !iterator->ReadString16(&title_) ||
+      !iterator->ReadString(&content_state_) ||
+      !iterator->ReadInt(&transition_type_int))
+    return false;
+  virtual_url_ = GURL(virtual_url_spec);
+  transition_type_ = static_cast<content::PageTransition>(transition_type_int);
+
+  // type_mask did not always exist in the written stream. As such, we
+  // don't fail if it can't be read.
+  int type_mask = 0;
+  bool has_type_mask = iterator->ReadInt(&type_mask);
+
+  if (has_type_mask) {
+    has_post_data_ = type_mask & HAS_POST_DATA;
+    // the "referrer" property was added after type_mask to the written
+    // stream. As such, we don't fail if it can't be read.
+    std::string referrer_spec;
+    if (!iterator->ReadString(&referrer_spec))
+      referrer_spec = std::string();
+    // The "referrer policy" property was added even later, so we fall back to
+    // the default policy if the property is not present.
+    int policy_int;
+    WebKit::WebReferrerPolicy policy;
+    if (iterator->ReadInt(&policy_int))
+      policy = static_cast<WebKit::WebReferrerPolicy>(policy_int);
+    else
+      policy = WebKit::WebReferrerPolicyDefault;
+    referrer_ = content::Referrer(GURL(referrer_spec), policy);
+
+    // If the original URL can't be found, leave it empty.
+    std::string original_request_url_spec;
+    if (!iterator->ReadString(&original_request_url_spec))
+      original_request_url_spec = std::string();
+    original_request_url_ = GURL(original_request_url_spec);
+
+    // Default to not overriding the user agent if we don't have info.
+    if (!iterator->ReadBool(&is_overriding_user_agent_))
+      is_overriding_user_agent_ = false;
+  }
+
+  // TODO(akalin): Restore timestamp when it is persisted.
+  return true;
+}
+
+scoped_ptr<NavigationEntry> TabNavigation::ToNavigationEntry(
+    int page_id,
+    content::BrowserContext* browser_context) const {
+  scoped_ptr<NavigationEntry> entry(
+      content::NavigationController::CreateNavigationEntry(
+          virtual_url_,
+          referrer_,
+          // Use a transition type of reload so that we don't incorrectly
+          // increase the typed count.
+          content::PAGE_TRANSITION_RELOAD,
+          false,
+          // The extra headers are not sync'ed across sessions.
+          std::string(),
+          browser_context));
+
+  entry->SetTitle(title_);
+  entry->SetContentState(content_state_);
   entry->SetPageID(page_id);
-  entry->SetTitle(title_);
-  entry->SetContentState(state_);
-  entry->SetHasPostData(type_mask_ & TabNavigation::HAS_POST_DATA);
+  entry->SetHasPostData(has_post_data_);
   entry->SetPostID(post_id_);
   entry->SetOriginalRequestURL(original_request_url_);
   entry->SetIsOverridingUserAgent(is_overriding_user_agent_);
 
-  return entry;
-}
-
-void TabNavigation::SetFromNavigationEntry(const NavigationEntry& entry) {
-  virtual_url_ = entry.GetVirtualURL();
-  referrer_ = entry.GetReferrer();
-  title_ = entry.GetTitle();
-  state_ = entry.GetContentState();
-  transition_ = entry.GetTransitionType();
-  type_mask_ = entry.GetHasPostData() ? TabNavigation::HAS_POST_DATA : 0;
-  post_id_ = entry.GetPostID();
-  original_request_url_ = entry.GetOriginalRequestURL();
-  is_overriding_user_agent_ = entry.GetIsOverridingUserAgent();
+  // TODO(akalin): Set |entry|'s timestamp once NavigationEntry has a
+  // field for it.
+
+  return entry.Pass();
+}
+
+// TODO(zea): perhaps sync state (scroll position, form entries, etc.) as well?
+// See http://crbug.com/67068.
+sync_pb::TabNavigation TabNavigation::ToSyncData() const {
+  sync_pb::TabNavigation sync_data;
+  sync_data.set_virtual_url(virtual_url_.spec());
+  // FIXME(zea): Support referrer policy?
+  sync_data.set_referrer(referrer_.url.spec());
+  sync_data.set_title(UTF16ToUTF8(title_));
+  switch (transition_type_) {
+    case content::PAGE_TRANSITION_LINK:
+      sync_data.set_page_transition(
+          sync_pb::SyncEnums_PageTransition_LINK);
+      break;
+    case content::PAGE_TRANSITION_TYPED:
+      sync_data.set_page_transition(
+          sync_pb::SyncEnums_PageTransition_TYPED);
+      break;
+    case content::PAGE_TRANSITION_AUTO_BOOKMARK:
+      sync_data.set_page_transition(
+          sync_pb::SyncEnums_PageTransition_AUTO_BOOKMARK);
+      break;
+    case content::PAGE_TRANSITION_AUTO_SUBFRAME:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_AUTO_SUBFRAME);
+      break;
+    case content::PAGE_TRANSITION_MANUAL_SUBFRAME:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_MANUAL_SUBFRAME);
+      break;
+    case content::PAGE_TRANSITION_GENERATED:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_GENERATED);
+      break;
+    case content::PAGE_TRANSITION_AUTO_TOPLEVEL:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_AUTO_TOPLEVEL);
+      break;
+    case content::PAGE_TRANSITION_FORM_SUBMIT:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_FORM_SUBMIT);
+      break;
+    case content::PAGE_TRANSITION_RELOAD:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_RELOAD);
+      break;
+    case content::PAGE_TRANSITION_KEYWORD:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_KEYWORD);
+      break;
+    case content::PAGE_TRANSITION_KEYWORD_GENERATED:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_KEYWORD_GENERATED);
+      break;
+    case content::PAGE_TRANSITION_CHAIN_START:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_CHAIN_START);
+      break;
+    case content::PAGE_TRANSITION_CHAIN_END:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_CHAIN_END);
+      break;
+    case content::PAGE_TRANSITION_CLIENT_REDIRECT:
+      sync_data.set_navigation_qualifier(
+        sync_pb::SyncEnums_PageTransitionQualifier_CLIENT_REDIRECT);
+      break;
+    case content::PAGE_TRANSITION_SERVER_REDIRECT:
+      sync_data.set_navigation_qualifier(
+        sync_pb::SyncEnums_PageTransitionQualifier_SERVER_REDIRECT);
+      break;
+    default:
+      sync_data.set_page_transition(
+        sync_pb::SyncEnums_PageTransition_TYPED);
+  }
+  sync_data.set_unique_id(unique_id_);
+  sync_data.set_timestamp(syncer::TimeToProtoTime(timestamp_));
+  return sync_data;
 }
 
 // static
-void TabNavigation::CreateNavigationEntriesFromTabNavigations(
-    Profile* profile,
+std::vector<NavigationEntry*>
+TabNavigation::CreateNavigationEntriesFromTabNavigations(
     const std::vector<TabNavigation>& navigations,
-    std::vector<NavigationEntry*>* entries) {
+    content::BrowserContext* browser_context) {
   int page_id = 0;
-  for (std::vector<TabNavigation>::const_iterator i =
-           navigations.begin(); i != navigations.end(); ++i, ++page_id) {
-    entries->push_back(i->ToNavigationEntry(page_id, profile));
-  }
+  std::vector<NavigationEntry*> entries;
+  for (std::vector<TabNavigation>::const_iterator it = navigations.begin();
+       it != navigations.end(); ++it) {
+    entries.push_back(
+        it->ToNavigationEntry(page_id, browser_context).release());
+    ++page_id;
+  }
+  return entries;
 }
 
 // SessionTab -----------------------------------------------------------------
 
 SessionTab::SessionTab()
     : tab_visual_index(-1),
       current_navigation_index(-1),
       pinned(false) {
 }
 
 SessionTab::~SessionTab() {
 }
 
 // SessionWindow ---------------------------------------------------------------
 
 SessionWindow::SessionWindow()
     : selected_tab_index(-1),
       type(Browser::TYPE_TABBED),
       is_constrained(true),
       show_state(ui::SHOW_STATE_DEFAULT) {
 }
 
 SessionWindow::~SessionWindow() {
   STLDeleteElements(&tabs);
 }