Introduce ManagePasswordsState class.

chrome/browser/ui/passwords/manage_passwords_state.cc

+// Copyright 2015 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/ui/passwords/manage_passwords_state.h"
+
+#include "components/password_manager/content/common/credential_manager_types.h"
+#include "components/password_manager/core/browser/browser_save_password_progress_logger.h"
+#include "components/password_manager/core/browser/password_form_manager.h"
+#include "components/password_manager/core/browser/password_manager_client.h"
+
+using password_manager::PasswordFormManager;
+using autofill::PasswordFormMap;
+
+namespace {
+
+// Converts the map with pointers or const pointers to the vector of const
+// pointers.
+template <typename T>
+std::vector<const T*> MapToVector(
+    const std::map<base::string16, T*>& map) {
+  std::vector<const autofill::PasswordForm*> ret;
+  ret.reserve(map.size());
+  for (const auto& form_pair : map)
+    ret.push_back(form_pair.second);
+  return ret;
+}
+
+ScopedVector<const autofill::PasswordForm> DeepCopyMapToVector(
+    const PasswordFormMap& password_form_map) {
+  ScopedVector<const autofill::PasswordForm> ret;
+  ret.reserve(password_form_map.size());
+  for (const auto& form_pair : password_form_map)
+    ret.push_back(new autofill::PasswordForm(*form_pair.second));
+  return ret.Pass();
+}
+
+ScopedVector<const autofill::PasswordForm> ConstifyVector(
+    ScopedVector<autofill::PasswordForm>* forms) {
+  ScopedVector<const autofill::PasswordForm> ret;
+  ret.assign(forms->begin(), forms->end());
+  forms->weak_clear();
+  return ret.Pass();
+}
+
+// True if the unique keys for the forms are the same. The unique key is
+// (origin, username_element, username_value, password_element, signon_realm).
+bool IsEqualUniqueKey(const autofill::PasswordForm& left,
+                      const autofill::PasswordForm& right) {
+  return left.signon_realm == right.signon_realm &&
+      left.origin == right.origin &&
+      left.username_element == right.username_element &&
+      left.username_value == right.username_value &&
+      left.password_element == right.password_element;
+}
+
+void UpdateFormInVector(const autofill::PasswordForm& updated_form,

[vabr (Chromium), 2015/03/10 10:39:57]

This function seems to assume that there is at most one form in |forms| which
matches the unique key of |updated_forms|. Could you please mention that in a
comment?

This also applies to RemoveFormFromVector.

[vasilii, 2015/03/10 11:34:48]

Done.

+                        ScopedVector<const autofill::PasswordForm>* forms) {
+  ScopedVector<const autofill::PasswordForm>::iterator it = std::find_if(
+      forms->begin(), forms->end(),
+      [&updated_form](const autofill::PasswordForm* form) {
+    return IsEqualUniqueKey(*form, updated_form);
+  });
+  if (it != forms->end()) {
+    delete *it;
+    *it = new autofill::PasswordForm(updated_form);
+  }
+}
+
+// Removes |form_to_delete| from std::vector or ScopedVector.
+template <class Vector>
+void RemoveFormFromVector(const autofill::PasswordForm& form_to_delete,
+                          Vector* forms) {
+  typename Vector::iterator it = std::find_if(
+      forms->begin(), forms->end(),
+      [&form_to_delete](const autofill::PasswordForm* form) {
+    return IsEqualUniqueKey(*form, form_to_delete);
+  });
+  if (it != forms->end())
+    forms->erase(it);
+}
+
+}  // namespace
+
+ManagePasswordsState::ManagePasswordsState()
+    : state_(password_manager::ui::INACTIVE_STATE),
+      client_(nullptr) {
+}
+
+ManagePasswordsState::~ManagePasswordsState() {}
+
+void ManagePasswordsState::OnPendingPassword(
+      scoped_ptr<password_manager::PasswordFormManager> form_manager) {
+  ClearData();
+  form_manager_ = form_manager.Pass();
+  current_forms_weak_ = MapToVector(form_manager_->best_matches());
+  origin_ = form_manager_->pending_credentials().origin;
+  SetState(password_manager::ui::PENDING_PASSWORD_STATE);
+}
+
+void ManagePasswordsState::OnRequestCredentials(
+    ScopedVector<autofill::PasswordForm> local_credentials,
+    ScopedVector<autofill::PasswordForm> federated_credentials,
+    const GURL& origin) {
+  ClearData();
+  local_credentials_forms_ = ConstifyVector(&local_credentials);
+  federated_credentials_forms_ = ConstifyVector(&federated_credentials);
+  origin_ = origin;
+  SetState(password_manager::ui::CREDENTIAL_REQUEST_STATE);
+}
+
+void ManagePasswordsState::OnAutoSignin(
+    ScopedVector<autofill::PasswordForm> local_forms) {
+  DCHECK(!local_forms.empty());
+  ClearData();
+  local_credentials_forms_ = ConstifyVector(&local_forms);
+  origin_ = local_credentials_forms_[0]->origin;
+  SetState(password_manager::ui::AUTO_SIGNIN_STATE);
+}
+
+void ManagePasswordsState::OnAutomaticPasswordSave(
+    scoped_ptr<PasswordFormManager> form_manager) {
+  ClearData();
+  form_manager_ = form_manager.Pass();
+  autofill::ConstPasswordFormMap current_forms;
+  current_forms.insert(form_manager_->best_matches().begin(),
+                       form_manager_->best_matches().end());
+  current_forms[form_manager_->associated_username()] =
+      &form_manager_->pending_credentials();
+  current_forms_weak_ = MapToVector(current_forms);
+  origin_ = form_manager_->pending_credentials().origin;
+  SetState(password_manager::ui::CONFIRMATION_STATE);
+}
+
+void ManagePasswordsState::OnPasswordAutofilled(
+    const PasswordFormMap& password_form_map) {
+  DCHECK(!password_form_map.empty());
+  ClearData();
+  if (password_form_map.begin()->second->IsPublicSuffixMatch()) {
+    // Don't show the UI for PSL matched passwords. They are not stored for this
+    // page and cannot be deleted.
+    origin_ = GURL();
+    SetState(password_manager::ui::INACTIVE_STATE);
+  } else {
+    local_credentials_forms_ = DeepCopyMapToVector(password_form_map);
+    origin_ = local_credentials_forms_.front()->origin;
+    SetState(password_manager::ui::MANAGE_STATE);
+  }
+}
+
+void ManagePasswordsState::OnBlacklistBlockedAutofill(
+    const autofill::PasswordFormMap& password_form_map) {
+  DCHECK(!password_form_map.empty());
+  ClearData();
+  local_credentials_forms_ = DeepCopyMapToVector(password_form_map);
+  origin_ = local_credentials_forms_.front()->origin;
+  SetState(password_manager::ui::BLACKLIST_STATE);
+}
+
+void ManagePasswordsState::OnInactive() {
+  ClearData();
+  origin_ = GURL();
+  SetState(password_manager::ui::INACTIVE_STATE);
+}
+
+void ManagePasswordsState::TransitionToState(

[vabr (Chromium), 2015/03/10 10:39:56]

The declaration comment lists the allowed transitions, but the code does not
seem to check that.

[vasilii, 2015/03/10 11:34:48]

Done.

+    password_manager::ui::State state) {
+  DCHECK_NE(password_manager::ui::INACTIVE_STATE, state);
+  DCHECK_NE(password_manager::ui::INACTIVE_STATE, state_);
+  if (state_ == password_manager::ui::CREDENTIAL_REQUEST_STATE &&
+      !credentials_callback_.is_null()) {
+    credentials_callback_.Run(password_manager::CredentialInfo());
+    credentials_callback_.Reset();
+  }
+  SetState(state);
+}
+
+void ManagePasswordsState::ProcessLoginsChanged(
+    const password_manager::PasswordStoreChangeList& changes) {
+  if (state() == password_manager::ui::INACTIVE_STATE)
+    return;
+
+  for (const password_manager::PasswordStoreChange& change : changes) {
+    const autofill::PasswordForm& changed_form = change.form();
+    if (change.type() == password_manager::PasswordStoreChange::REMOVE) {
+      DeleteForm(changed_form);
+      if (changed_form.blacklisted_by_user &&

[vabr (Chromium), 2015/03/10 10:39:57]

The style guide weakly suggests braces for this if and the one on lines 196+.
"conditional or loop statements with complex conditions or statements may be
more readable with curly braces"
http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Conditionals

[vasilii, 2015/03/10 11:34:48]

Done.

+          state() == password_manager::ui::BLACKLIST_STATE &&
+          changed_form.origin == origin_)
+        TransitionToState(password_manager::ui::MANAGE_STATE);
+    } else {
+      if (change.type() == password_manager::PasswordStoreChange::UPDATE)
+        UpdateForm(changed_form);
+      else
+        AddForm(changed_form);
+      if (changed_form.blacklisted_by_user &&
+          changed_form.origin == origin_)
+        TransitionToState(password_manager::ui::BLACKLIST_STATE);
+    }
+  }
+}
+
+void ManagePasswordsState::ClearData() {
+  form_manager_.reset();
+  current_forms_weak_.clear();
+  local_credentials_forms_.clear();
+  federated_credentials_forms_.clear();
+  credentials_callback_.Reset();
+}
+
+void ManagePasswordsState::AddForm(const autofill::PasswordForm& form) {
+  if (form.origin != origin_)
+    return;
+  local_credentials_forms_.push_back(new autofill::PasswordForm(form));

[vabr (Chromium), 2015/03/10 10:39:56]

Should we check that a form with the same unique key is not already in
local_credentials_forms_?

[vasilii, 2015/03/10 11:34:48]

OK. Let's be on the safe side.

+  if (form_manager_)
+    current_forms_weak_.push_back(local_credentials_forms_.back());
+}
+
+void ManagePasswordsState::UpdateForm(const autofill::PasswordForm& form) {
+  if (form_manager_) {
+    // |current_forms_weak_| contains the list of current passwords.
+    std::vector<const autofill::PasswordForm*>::iterator it = std::find_if(
+        current_forms_weak_.begin(), current_forms_weak_.end(),
+        [&form](const autofill::PasswordForm* current_form) {
+      return IsEqualUniqueKey(form, *current_form);
+    });
+    if (it != current_forms_weak_.end()) {
+      RemoveFormFromVector(form, &local_credentials_forms_);
+      local_credentials_forms_.push_back(new autofill::PasswordForm(form));
+      *it = local_credentials_forms_.back();
+    }
+  } else {
+    // |current_forms_weak_| isn't used.
+    UpdateFormInVector(form, &local_credentials_forms_);
+    UpdateFormInVector(form, &federated_credentials_forms_);
+  }
+}
+
+void ManagePasswordsState::DeleteForm(const autofill::PasswordForm& form) {
+  RemoveFormFromVector(form, &current_forms_weak_);
+  RemoveFormFromVector(form, &local_credentials_forms_);
+  RemoveFormFromVector(form, &federated_credentials_forms_);
+}
+
+void ManagePasswordsState::SetState(password_manager::ui::State state) {
+  if (client_ && client_->IsLoggingActive()) {
+    password_manager::BrowserSavePasswordProgressLogger logger(client_);
+    logger.LogNumber(
+        autofill::SavePasswordProgressLogger::STRING_NEW_UI_STATE,
+        state);
+  }
+  state_ = state;
+}