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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/autocomplete_history_manager.h"
#include <vector>
#include "base/string_util.h"
#include "chrome/browser/pref_service.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/common/pref_names.h"
#include "webkit/glue/form_field_values.h"
// Limit on the number of suggestions to appear in the pop-up menu under an
// text input element in a form.
static const int kMaxAutofillMenuItems = 6;
AutocompleteHistoryManager::AutocompleteHistoryManager(
TabContents* tab_contents) : tab_contents_(tab_contents),
pending_query_handle_(0),
query_id_(0) {
form_autofill_enabled_.Init(prefs::kAutoFillEnabled,
profile()->GetPrefs(), NULL);
}
AutocompleteHistoryManager::~AutocompleteHistoryManager() {
CancelPendingQuery();
}
void AutocompleteHistoryManager::CancelPendingQuery() {
if (pending_query_handle_) {
SendSuggestions(NULL);
WebDataService* web_data_service =
profile()->GetWebDataService(Profile::EXPLICIT_ACCESS);
if (!web_data_service) {
NOTREACHED();
return;
}
web_data_service->CancelRequest(pending_query_handle_);
}
pending_query_handle_ = 0;
}
Profile* AutocompleteHistoryManager::profile() {
return tab_contents_->profile();
}
void AutocompleteHistoryManager::FormFieldValuesSubmitted(
const webkit_glue::FormFieldValues& form) {
StoreFormEntriesInWebDatabase(form);
}
bool AutocompleteHistoryManager::GetAutocompleteSuggestions(
int query_id, const string16& name, const string16& prefix) {
if (!*form_autofill_enabled_)
return false;
WebDataService* web_data_service =
profile()->GetWebDataService(Profile::EXPLICIT_ACCESS);
if (!web_data_service) {
NOTREACHED();
return false;
}
CancelPendingQuery();
query_id_ = query_id;
pending_query_handle_ = web_data_service->GetFormValuesForElementName(
name, prefix, kMaxAutofillMenuItems, this);
return true;
}
void AutocompleteHistoryManager::RemoveAutocompleteEntry(
const string16& name, const string16& value) {
WebDataService* web_data_service =
profile()->GetWebDataService(Profile::EXPLICIT_ACCESS);
if (!web_data_service) {
NOTREACHED();
return;
}
web_data_service->RemoveFormValueForElementName(name, value);
}
void AutocompleteHistoryManager::OnWebDataServiceRequestDone(
WebDataService::Handle h,
const WDTypedResult* result) {
DCHECK(pending_query_handle_);
pending_query_handle_ = 0;
if (*form_autofill_enabled_) {
DCHECK(result);
SendSuggestions(result);
} else {
SendSuggestions(NULL);
}
}
void AutocompleteHistoryManager::StoreFormEntriesInWebDatabase(
const webkit_glue::FormFieldValues& form) {
if (!*form_autofill_enabled_)
return;
if (profile()->IsOffTheRecord())
return;
// We put the following restriction on stored FormFields:
// - non-empty name
// - non-empty value
// - text field
std::vector<webkit_glue::FormField> values;
for (std::vector<webkit_glue::FormField>::const_iterator iter =
form.elements.begin();
iter != form.elements.end(); ++iter) {
if (!iter->value().empty() &&
!iter->name().empty() &&
iter->form_control_type() == ASCIIToUTF16("text"))
values.push_back(*iter);
}
profile()->GetWebDataService(Profile::EXPLICIT_ACCESS)->
AddFormFieldValues(values);
}
void AutocompleteHistoryManager::SendSuggestions(const WDTypedResult* result) {
RenderViewHost* host = tab_contents_->render_view_host();
if (!host)
return;
if (result) {
DCHECK(result->GetType() == AUTOFILL_VALUE_RESULT);
const WDResult<std::vector<string16> >* autofill_result =
static_cast<const WDResult<std::vector<string16> >*>(result);
host->AutocompleteSuggestionsReturned(
query_id_, autofill_result->GetValue(), -1);
} else {
host->AutocompleteSuggestionsReturned(
query_id_, std::vector<string16>(), -1);
}
}
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