components/autofill/content/renderer/autofill_agent.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/autofill/content/renderer/autofill_agent.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/string_split.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "base/time/time.h"
  14 #include "components/autofill/content/common/autofill_messages.h"
  15 #include "components/autofill/content/renderer/form_autofill_util.h"
  16 #include "components/autofill/content/renderer/page_click_tracker.h"
  17 #include "components/autofill/content/renderer/password_autofill_agent.h"
  18 #include "components/autofill/content/renderer/password_generation_agent.h"
  19 #include "components/autofill/core/common/autofill_constants.h"
  20 #include "components/autofill/core/common/autofill_data_validation.h"
  21 #include "components/autofill/core/common/autofill_switches.h"
  22 #include "components/autofill/core/common/form_data.h"
  23 #include "components/autofill/core/common/form_data_predictions.h"
  24 #include "components/autofill/core/common/form_field_data.h"
  25 #include "components/autofill/core/common/password_form.h"
  26 #include "components/autofill/core/common/web_element_descriptor.h"
  27 #include "content/public/common/content_switches.h"
  28 #include "content/public/common/ssl_status.h"
  29 #include "content/public/common/url_constants.h"
  30 #include "content/public/renderer/render_view.h"
  31 #include "net/cert/cert_status_flags.h"
  32 #include "third_party/WebKit/public/platform/WebRect.h"
  33 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  34 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
  35 #include "third_party/WebKit/public/web/WebDataSource.h"
  36 #include "third_party/WebKit/public/web/WebDocument.h"
  37 #include "third_party/WebKit/public/web/WebElementCollection.h"
  38 #include "third_party/WebKit/public/web/WebFormControlElement.h"
  39 #include "third_party/WebKit/public/web/WebFormElement.h"
  40 #include "third_party/WebKit/public/web/WebInputEvent.h"
  41 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  42 #include "third_party/WebKit/public/web/WebNode.h"
  43 #include "third_party/WebKit/public/web/WebOptionElement.h"
  44 #include "third_party/WebKit/public/web/WebTextAreaElement.h"
  45 #include "third_party/WebKit/public/web/WebView.h"
  46 #include "ui/base/l10n/l10n_util.h"
  47 #include "ui/events/keycodes/keyboard_codes.h"
  48
  49 using blink::WebAutofillClient;
  50 using blink::WebConsoleMessage;
  51 using blink::WebElement;
  52 using blink::WebElementCollection;
  53 using blink::WebFormControlElement;
  54 using blink::WebFormElement;
  55 using blink::WebFrame;
  56 using blink::WebInputElement;
  57 using blink::WebKeyboardEvent;
  58 using blink::WebLocalFrame;
  59 using blink::WebNode;
  60 using blink::WebOptionElement;
  61 using blink::WebString;
  62 using blink::WebTextAreaElement;
  63 using blink::WebVector;
  64
  65 namespace autofill {
  66
  67 namespace {
  68
  69 // Gets all the data list values (with corresponding label) for the given
  70 // element.
  71 void GetDataListSuggestions(const WebInputElement& element,
  72                             bool ignore_current_value,
  73                             std::vector<base::string16>* values,
  74                             std::vector<base::string16>* labels) {
  75   WebElementCollection options = element.dataListOptions();
  76   if (options.isNull())
  77     return;
  78
  79   base::string16 prefix;
  80   if (!ignore_current_value) {
  81     prefix = element.editingValue();
  82     if (element.isMultiple() && element.isEmailField()) {
  83       std::vector<base::string16> parts;
  84       base::SplitStringDontTrim(prefix, ',', &parts);
  85       if (parts.size() > 0) {
  86         base::TrimWhitespace(parts[parts.size() - 1], base::TRIM_LEADING,
  87                              &prefix);
  88       }
  89     }
  90   }
  91   for (WebOptionElement option = options.firstItem().to<WebOptionElement>();
  92        !option.isNull(); option = options.nextItem().to<WebOptionElement>()) {
  93     if (!StartsWith(option.value(), prefix, false) ||
  94         option.value() == prefix ||
  95         !element.isValidValue(option.value()))
  96       continue;
  97
  98     values->push_back(option.value());
  99     if (option.value() != option.label())
 100       labels->push_back(option.label());
 101     else
 102       labels->push_back(base::string16());
 103   }
 104 }
 105
 106 // Trim the vector before sending it to the browser process to ensure we
 107 // don't send too much data through the IPC.
 108 void TrimStringVectorForIPC(std::vector<base::string16>* strings) {
 109   // Limit the size of the vector.
 110   if (strings->size() > kMaxListSize)
 111     strings->resize(kMaxListSize);
 112
 113   // Limit the size of the strings in the vector.
 114   for (size_t i = 0; i < strings->size(); ++i) {
 115     if ((*strings)[i].length() > kMaxDataLength)
 116       (*strings)[i].resize(kMaxDataLength);
 117   }
 118 }
 119
 120 }  // namespace
 121
 122 AutofillAgent::AutofillAgent(content::RenderView* render_view,
 123                              PasswordAutofillAgent* password_autofill_agent,
 124                              PasswordGenerationAgent* password_generation_agent)
 125     : content::RenderViewObserver(render_view),
 126       password_autofill_agent_(password_autofill_agent),
 127       password_generation_agent_(password_generation_agent),
 128       autofill_query_id_(0),
 129       web_view_(render_view->GetWebView()),
 130       display_warning_if_disabled_(false),
 131       was_query_node_autofilled_(false),
 132       has_shown_autofill_popup_for_current_edit_(false),
 133       did_set_node_text_(false),
 134       ignore_text_changes_(false),
 135       is_popup_possibly_visible_(false),
 136       main_frame_processed_(false),
 137       weak_ptr_factory_(this) {
 138   render_view->GetWebView()->setAutofillClient(this);
 139
 140   // The PageClickTracker is a RenderViewObserver, and hence will be freed when
 141   // the RenderView is destroyed.
 142   new PageClickTracker(render_view, this);
 143 }
 144
 145 AutofillAgent::~AutofillAgent() {}
 146
 147 bool AutofillAgent::OnMessageReceived(const IPC::Message& message) {
 148   bool handled = true;
 149   IPC_BEGIN_MESSAGE_MAP(AutofillAgent, message)
 150     IPC_MESSAGE_HANDLER(AutofillMsg_Ping, OnPing)
 151     IPC_MESSAGE_HANDLER(AutofillMsg_FillForm, OnFillForm)
 152     IPC_MESSAGE_HANDLER(AutofillMsg_PreviewForm, OnPreviewForm)
 153     IPC_MESSAGE_HANDLER(AutofillMsg_FieldTypePredictionsAvailable,
 154                         OnFieldTypePredictionsAvailable)
 155     IPC_MESSAGE_HANDLER(AutofillMsg_ClearForm, OnClearForm)
 156     IPC_MESSAGE_HANDLER(AutofillMsg_ClearPreviewedForm, OnClearPreviewedForm)
 157     IPC_MESSAGE_HANDLER(AutofillMsg_FillFieldWithValue, OnFillFieldWithValue)
 158     IPC_MESSAGE_HANDLER(AutofillMsg_PreviewFieldWithValue,
 159                         OnPreviewFieldWithValue)
 160     IPC_MESSAGE_HANDLER(AutofillMsg_AcceptDataListSuggestion,
 161                         OnAcceptDataListSuggestion)
 162     IPC_MESSAGE_HANDLER(AutofillMsg_FillPasswordSuggestion,
 163                         OnFillPasswordSuggestion)
 164     IPC_MESSAGE_HANDLER(AutofillMsg_PreviewPasswordSuggestion,
 165                         OnPreviewPasswordSuggestion)
 166     IPC_MESSAGE_HANDLER(AutofillMsg_RequestAutocompleteResult,
 167                         OnRequestAutocompleteResult)
 168     IPC_MESSAGE_UNHANDLED(handled = false)
 169   IPC_END_MESSAGE_MAP()
 170   return handled;
 171 }
 172
 173 void AutofillAgent::DidFinishDocumentLoad(WebLocalFrame* frame) {
 174   // If the main frame just finished loading, we should process it.
 175   if (!frame->parent())
 176     main_frame_processed_ = false;
 177
 178   ProcessForms(*frame);
 179 }
 180
 181 void AutofillAgent::DidCommitProvisionalLoad(WebLocalFrame* frame,
 182                                              bool is_new_navigation) {
 183   form_cache_.ResetFrame(*frame);
 184 }
 185
 186 void AutofillAgent::FrameDetached(WebFrame* frame) {
 187   form_cache_.ResetFrame(*frame);
 188 }
 189
 190 void AutofillAgent::FrameWillClose(WebFrame* frame) {
 191   if (in_flight_request_form_.isNull())
 192     return;
 193
 194   for (WebFrame* temp = in_flight_request_form_.document().frame();
 195        temp; temp = temp->parent()) {
 196     if (temp == frame) {
 197       Send(new AutofillHostMsg_CancelRequestAutocomplete(routing_id()));
 198       break;
 199     }
 200   }
 201 }
 202
 203 void AutofillAgent::WillSubmitForm(WebLocalFrame* frame,
 204                                    const WebFormElement& form) {
 205   FormData form_data;
 206   if (WebFormElementToFormData(form,
 207                                WebFormControlElement(),
 208                                REQUIRE_NONE,
 209                                static_cast<ExtractMask>(
 210                                    EXTRACT_VALUE | EXTRACT_OPTION_TEXT),
 211                                &form_data,
 212                                NULL)) {
 213     Send(new AutofillHostMsg_FormSubmitted(routing_id(), form_data,
 214                                            base::TimeTicks::Now()));
 215   }
 216 }
 217
 218 void AutofillAgent::FocusedNodeChanged(const WebNode& node) {
 219   HidePopup();
 220
 221   if (password_generation_agent_ &&
 222       password_generation_agent_->FocusedNodeHasChanged(node)) {
 223     is_popup_possibly_visible_ = true;
 224     return;
 225   }
 226
 227   if (node.isNull() || !node.isElementNode())
 228     return;
 229
 230   WebElement web_element = node.toConst<WebElement>();
 231
 232   if (!web_element.document().frame())
 233       return;
 234
 235   const WebInputElement* element = toWebInputElement(&web_element);
 236
 237   if (!element || !element->isEnabled() || element->isReadOnly() ||
 238       !element->isTextField() || element->isPasswordField())
 239     return;
 240
 241   element_ = *element;
 242 }
 243
 244 void AutofillAgent::OrientationChangeEvent() {
 245   HidePopup();
 246 }
 247
 248 void AutofillAgent::Resized() {
 249   HidePopup();
 250 }
 251
 252 void AutofillAgent::DidChangeScrollOffset(WebLocalFrame*) {
 253   HidePopup();
 254 }
 255
 256 void AutofillAgent::didRequestAutocomplete(
 257     const WebFormElement& form) {
 258   // Disallow the dialog over non-https or broken https, except when the
 259   // ignore SSL flag is passed. See http://crbug.com/272512.
 260   // TODO(palmer): this should be moved to the browser process after frames
 261   // get their own processes.
 262   GURL url(form.document().url());
 263   content::SSLStatus ssl_status =
 264       render_view()->GetSSLStatusOfFrame(form.document().frame());
 265   bool is_safe = url.SchemeIs(url::kHttpsScheme) &&
 266       !net::IsCertStatusError(ssl_status.cert_status);
 267   bool allow_unsafe = CommandLine::ForCurrentProcess()->HasSwitch(
 268       ::switches::kReduceSecurityForTesting);
 269
 270   FormData form_data;
 271   std::string error_message;
 272   if (!in_flight_request_form_.isNull()) {
 273     error_message = "already active.";
 274   } else if (!is_safe && !allow_unsafe) {
 275     error_message =
 276         "must use a secure connection or --reduce-security-for-testing.";
 277   } else if (!WebFormElementToFormData(form,
 278                                        WebFormControlElement(),
 279                                        REQUIRE_AUTOCOMPLETE,
 280                                        static_cast<ExtractMask>(
 281                                            EXTRACT_VALUE |
 282                                            EXTRACT_OPTION_TEXT |
 283                                            EXTRACT_OPTIONS),
 284                                        &form_data,
 285                                        NULL)) {
 286     error_message = "failed to parse form.";
 287   }
 288
 289   if (!error_message.empty()) {
 290     WebConsoleMessage console_message = WebConsoleMessage(
 291         WebConsoleMessage::LevelLog,
 292         WebString(base::ASCIIToUTF16("requestAutocomplete: ") +
 293                       base::ASCIIToUTF16(error_message)));
 294     form.document().frame()->addMessageToConsole(console_message);
 295     WebFormElement(form).finishRequestAutocomplete(
 296         WebFormElement::AutocompleteResultErrorDisabled);
 297     return;
 298   }
 299
 300   // Cancel any pending Autofill requests and hide any currently showing popups.
 301   ++autofill_query_id_;
 302   HidePopup();
 303
 304   in_flight_request_form_ = form;
 305   Send(new AutofillHostMsg_RequestAutocomplete(routing_id(), form_data, url));
 306 }
 307
 308 void AutofillAgent::setIgnoreTextChanges(bool ignore) {
 309   ignore_text_changes_ = ignore;
 310 }
 311
 312 void AutofillAgent::FormControlElementClicked(
 313     const WebFormControlElement& element,
 314     bool was_focused) {
 315   const WebInputElement* input_element = toWebInputElement(&element);
 316   if (!input_element && !IsTextAreaElement(element))
 317     return;
 318
 319   bool show_full_suggestion_list = element.isAutofilled() || was_focused;
 320   bool show_password_suggestions_only = !was_focused;
 321   ShowSuggestions(element,
 322                   true,
 323                   false,
 324                   true,
 325                   false,
 326                   show_full_suggestion_list,
 327                   show_password_suggestions_only);
 328 }
 329
 330 void AutofillAgent::textFieldDidEndEditing(const WebInputElement& element) {
 331   password_autofill_agent_->TextFieldDidEndEditing(element);
 332   has_shown_autofill_popup_for_current_edit_ = false;
 333   Send(new AutofillHostMsg_DidEndTextFieldEditing(routing_id()));
 334 }
 335
 336 void AutofillAgent::textFieldDidChange(const WebFormControlElement& element) {
 337   if (ignore_text_changes_)
 338     return;
 339
 340   DCHECK(toWebInputElement(&element) || IsTextAreaElement(element));
 341
 342   if (did_set_node_text_) {
 343     did_set_node_text_ = false;
 344     return;
 345   }
 346
 347   // We post a task for doing the Autofill as the caret position is not set
 348   // properly at this point (http://bugs.webkit.org/show_bug.cgi?id=16976) and
 349   // it is needed to trigger autofill.
 350   weak_ptr_factory_.InvalidateWeakPtrs();
 351   base::MessageLoop::current()->PostTask(
 352       FROM_HERE,
 353       base::Bind(&AutofillAgent::TextFieldDidChangeImpl,
 354                  weak_ptr_factory_.GetWeakPtr(),
 355                  element));
 356 }
 357
 358 void AutofillAgent::TextFieldDidChangeImpl(
 359     const WebFormControlElement& element) {
 360   // If the element isn't focused then the changes don't matter. This check is
 361   // required to properly handle IME interactions.
 362   if (!element.focused())
 363     return;
 364
 365   const WebInputElement* input_element = toWebInputElement(&element);
 366   if (input_element) {
 367     if (password_generation_agent_ &&
 368         password_generation_agent_->TextDidChangeInTextField(*input_element)) {
 369       is_popup_possibly_visible_ = true;
 370       return;
 371     }
 372
 373     if (password_autofill_agent_->TextDidChangeInTextField(*input_element)) {
 374       element_ = element;
 375       return;
 376     }
 377   }
 378
 379   ShowSuggestions(element, false, true, false, false, false, false);
 380
 381   FormData form;
 382   FormFieldData field;
 383   if (FindFormAndFieldForFormControlElement(element,
 384                                             &form,
 385                                             &field,
 386                                             REQUIRE_NONE)) {
 387     Send(new AutofillHostMsg_TextFieldDidChange(routing_id(), form, field,
 388                                                 base::TimeTicks::Now()));
 389   }
 390 }
 391
 392 void AutofillAgent::textFieldDidReceiveKeyDown(const WebInputElement& element,
 393                                                const WebKeyboardEvent& event) {
 394   if (password_autofill_agent_->TextFieldHandlingKeyDown(element, event)) {
 395     element_ = element;
 396     return;
 397   }
 398
 399   if (event.windowsKeyCode == ui::VKEY_DOWN ||
 400       event.windowsKeyCode == ui::VKEY_UP)
 401     ShowSuggestions(element, true, true, true, false, false, false);
 402 }
 403
 404 void AutofillAgent::openTextDataListChooser(const WebInputElement& element) {
 405   ShowSuggestions(element, true, false, false, true, false, false);
 406 }
 407
 408 void AutofillAgent::firstUserGestureObserved() {
 409   password_autofill_agent_->FirstUserGestureObserved();
 410 }
 411
 412 void AutofillAgent::AcceptDataListSuggestion(
 413     const base::string16& suggested_value) {
 414   WebInputElement* input_element = toWebInputElement(&element_);
 415   DCHECK(input_element);
 416   base::string16 new_value = suggested_value;
 417   // If this element takes multiple values then replace the last part with
 418   // the suggestion.
 419   if (input_element->isMultiple() && input_element->isEmailField()) {
 420     std::vector<base::string16> parts;
 421
 422     base::SplitStringDontTrim(input_element->editingValue(), ',', &parts);
 423     if (parts.size() == 0)
 424       parts.push_back(base::string16());
 425
 426     base::string16 last_part = parts.back();
 427     // We want to keep just the leading whitespace.
 428     for (size_t i = 0; i < last_part.size(); ++i) {
 429       if (!IsWhitespace(last_part[i])) {
 430         last_part = last_part.substr(0, i);
 431         break;
 432       }
 433     }
 434     last_part.append(suggested_value);
 435     parts[parts.size() - 1] = last_part;
 436
 437     new_value = JoinString(parts, ',');
 438   }
 439   FillFieldWithValue(new_value, input_element);
 440 }
 441
 442 void AutofillAgent::OnFieldTypePredictionsAvailable(
 443     const std::vector<FormDataPredictions>& forms) {
 444   for (size_t i = 0; i < forms.size(); ++i) {
 445     form_cache_.ShowPredictions(forms[i]);
 446   }
 447 }
 448
 449 void AutofillAgent::OnFillForm(int query_id, const FormData& form) {
 450   if (!render_view()->GetWebView() || query_id != autofill_query_id_)
 451     return;
 452
 453   was_query_node_autofilled_ = element_.isAutofilled();
 454   FillForm(form, element_);
 455   Send(new AutofillHostMsg_DidFillAutofillFormData(routing_id(),
 456                                                    base::TimeTicks::Now()));
 457 }
 458
 459 void AutofillAgent::OnPing() {
 460   Send(new AutofillHostMsg_PingAck(routing_id()));
 461 }
 462
 463 void AutofillAgent::OnPreviewForm(int query_id, const FormData& form) {
 464   if (!render_view()->GetWebView() || query_id != autofill_query_id_)
 465     return;
 466
 467   was_query_node_autofilled_ = element_.isAutofilled();
 468   PreviewForm(form, element_);
 469   Send(new AutofillHostMsg_DidPreviewAutofillFormData(routing_id()));
 470 }
 471
 472 void AutofillAgent::OnClearForm() {
 473   form_cache_.ClearFormWithElement(element_);
 474 }
 475
 476 void AutofillAgent::OnClearPreviewedForm() {
 477   if (!element_.isNull()) {
 478     if (password_autofill_agent_->DidClearAutofillSelection(element_))
 479       return;
 480
 481     ClearPreviewedFormWithElement(element_, was_query_node_autofilled_);
 482   } else {
 483     // TODO(isherman): There seem to be rare cases where this code *is*
 484     // reachable: see [ http://crbug.com/96321#c6 ].  Ideally we would
 485     // understand those cases and fix the code to avoid them.  However, so far I
 486     // have been unable to reproduce such a case locally.  If you hit this
 487     // NOTREACHED(), please file a bug against me.
 488     NOTREACHED();
 489   }
 490 }
 491
 492 void AutofillAgent::OnFillFieldWithValue(const base::string16& value) {
 493   WebInputElement* input_element = toWebInputElement(&element_);
 494   if (input_element) {
 495     FillFieldWithValue(value, input_element);
 496     input_element->setAutofilled(true);
 497   }
 498 }
 499
 500 void AutofillAgent::OnPreviewFieldWithValue(const base::string16& value) {
 501   WebInputElement* input_element = toWebInputElement(&element_);
 502   if (input_element)
 503     PreviewFieldWithValue(value, input_element);
 504 }
 505
 506 void AutofillAgent::OnAcceptDataListSuggestion(const base::string16& value) {
 507   AcceptDataListSuggestion(value);
 508 }
 509
 510 void AutofillAgent::OnFillPasswordSuggestion(const base::string16& username,
 511                                              const base::string16& password) {
 512   bool handled = password_autofill_agent_->FillSuggestion(
 513       element_,
 514       username,
 515       password);
 516   DCHECK(handled);
 517 }
 518
 519 void AutofillAgent::OnPreviewPasswordSuggestion(
 520     const base::string16& username,
 521     const base::string16& password) {
 522   bool handled = password_autofill_agent_->PreviewSuggestion(
 523       element_,
 524       username,
 525       password);
 526   DCHECK(handled);
 527 }
 528
 529 void AutofillAgent::OnRequestAutocompleteResult(
 530     WebFormElement::AutocompleteResult result,
 531     const base::string16& message,
 532     const FormData& form_data) {
 533   if (in_flight_request_form_.isNull())
 534     return;
 535
 536   if (result == WebFormElement::AutocompleteResultSuccess) {
 537     FillFormIncludingNonFocusableElements(form_data, in_flight_request_form_);
 538     if (!in_flight_request_form_.checkValidity())
 539       result = WebFormElement::AutocompleteResultErrorInvalid;
 540   }
 541
 542   in_flight_request_form_.finishRequestAutocomplete(result);
 543
 544   if (!message.empty()) {
 545     const base::string16 prefix(base::ASCIIToUTF16("requestAutocomplete: "));
 546     WebConsoleMessage console_message = WebConsoleMessage(
 547         WebConsoleMessage::LevelLog, WebString(prefix + message));
 548     in_flight_request_form_.document().frame()->addMessageToConsole(
 549         console_message);
 550   }
 551
 552   in_flight_request_form_.reset();
 553 }
 554
 555 void AutofillAgent::ShowSuggestions(const WebFormControlElement& element,
 556                                     bool autofill_on_empty_values,
 557                                     bool requires_caret_at_end,
 558                                     bool display_warning_if_disabled,
 559                                     bool datalist_only,
 560                                     bool show_full_suggestion_list,
 561                                     bool show_password_suggestions_only) {
 562   if (!element.isEnabled() || element.isReadOnly())
 563     return;
 564   if (!datalist_only && !element.suggestedValue().isEmpty())
 565     return;
 566
 567   const WebInputElement* input_element = toWebInputElement(&element);
 568   if (input_element) {
 569     if (!input_element->isTextField() || input_element->isPasswordField())
 570       return;
 571     if (!datalist_only && !input_element->suggestedValue().isEmpty())
 572       return;
 573   } else {
 574     DCHECK(IsTextAreaElement(element));
 575     if (!element.toConst<WebTextAreaElement>().suggestedValue().isEmpty())
 576       return;
 577   }
 578
 579   // Don't attempt to autofill with values that are too large or if filling
 580   // criteria are not met.
 581   WebString value = element.editingValue();
 582   if (!datalist_only &&
 583       (value.length() > kMaxDataLength ||
 584        (!autofill_on_empty_values && value.isEmpty()) ||
 585        (requires_caret_at_end &&
 586         (element.selectionStart() != element.selectionEnd() ||
 587          element.selectionEnd() != static_cast<int>(value.length()))))) {
 588     // Any popup currently showing is obsolete.
 589     HidePopup();
 590     return;
 591   }
 592
 593   element_ = element;
 594   if (IsAutofillableInputElement(input_element) &&
 595       (password_autofill_agent_->ShowSuggestions(*input_element,
 596                                                  show_full_suggestion_list) ||
 597        show_password_suggestions_only)) {
 598     is_popup_possibly_visible_ = true;
 599     return;
 600   }
 601
 602   // If autocomplete is disabled at the field level, ensure that the native
 603   // UI won't try to show a warning, since that may conflict with a custom
 604   // popup. Note that we cannot use the WebKit method element.autoComplete()
 605   // as it does not allow us to distinguish the case where autocomplete is
 606   // disabled for *both* the element and for the form.
 607   const base::string16 autocomplete_attribute =
 608       element.getAttribute("autocomplete");
 609   if (LowerCaseEqualsASCII(autocomplete_attribute, "off"))
 610     display_warning_if_disabled = false;
 611
 612   QueryAutofillSuggestions(element,
 613                            display_warning_if_disabled,
 614                            datalist_only);
 615 }
 616
 617 void AutofillAgent::QueryAutofillSuggestions(
 618     const WebFormControlElement& element,
 619     bool display_warning_if_disabled,
 620     bool datalist_only) {
 621   if (!element.document().frame())
 622     return;
 623
 624   DCHECK(toWebInputElement(&element) || IsTextAreaElement(element));
 625
 626   static int query_counter = 0;
 627   autofill_query_id_ = query_counter++;
 628   display_warning_if_disabled_ = display_warning_if_disabled;
 629
 630   // If autocomplete is disabled at the form level, we want to see if there
 631   // would have been any suggestions were it enabled, so that we can show a
 632   // warning.  Otherwise, we want to ignore fields that disable autocomplete, so
 633   // that the suggestions list does not include suggestions for these form
 634   // fields -- see comment 1 on http://crbug.com/69914
 635   const RequirementsMask requirements =
 636       element.autoComplete() ? REQUIRE_AUTOCOMPLETE : REQUIRE_NONE;
 637
 638   FormData form;
 639   FormFieldData field;
 640   if (!FindFormAndFieldForFormControlElement(element, &form, &field,
 641                                              requirements)) {
 642     // If we didn't find the cached form, at least let autocomplete have a shot
 643     // at providing suggestions.
 644     WebFormControlElementToFormField(element, EXTRACT_VALUE, &field);
 645   }
 646   if (datalist_only)
 647     field.should_autocomplete = false;
 648
 649   gfx::RectF bounding_box_scaled =
 650       GetScaledBoundingBox(web_view_->pageScaleFactor(), &element_);
 651
 652   std::vector<base::string16> data_list_values;
 653   std::vector<base::string16> data_list_labels;
 654   const WebInputElement* input_element = toWebInputElement(&element);
 655   if (input_element) {
 656     // Find the datalist values and send them to the browser process.
 657     GetDataListSuggestions(*input_element,
 658                            datalist_only,
 659                            &data_list_values,
 660                            &data_list_labels);
 661     TrimStringVectorForIPC(&data_list_values);
 662     TrimStringVectorForIPC(&data_list_labels);
 663   }
 664
 665   is_popup_possibly_visible_ = true;
 666   Send(new AutofillHostMsg_SetDataList(routing_id(),
 667                                        data_list_values,
 668                                        data_list_labels));
 669
 670   Send(new AutofillHostMsg_QueryFormFieldAutofill(routing_id(),
 671                                                   autofill_query_id_,
 672                                                   form,
 673                                                   field,
 674                                                   bounding_box_scaled,
 675                                                   display_warning_if_disabled));
 676 }
 677
 678 void AutofillAgent::FillFieldWithValue(const base::string16& value,
 679                                        WebInputElement* node) {
 680   did_set_node_text_ = true;
 681   node->setEditingValue(value.substr(0, node->maxLength()));
 682 }
 683
 684 void AutofillAgent::PreviewFieldWithValue(const base::string16& value,
 685                                           WebInputElement* node) {
 686   was_query_node_autofilled_ = element_.isAutofilled();
 687   node->setSuggestedValue(value.substr(0, node->maxLength()));
 688   node->setAutofilled(true);
 689   node->setSelectionRange(node->value().length(),
 690                           node->suggestedValue().length());
 691 }
 692
 693 void AutofillAgent::ProcessForms(const WebLocalFrame& frame) {
 694   // Record timestamp of when the forms are first seen. This is used to
 695   // measure the overhead of the Autofill feature.
 696   base::TimeTicks forms_seen_timestamp = base::TimeTicks::Now();
 697
 698   std::vector<FormData> forms;
 699   form_cache_.ExtractNewForms(frame, &forms);
 700
 701   // Always communicate to browser process for topmost frame.
 702   if (!forms.empty() ||
 703       (!frame.parent() && !main_frame_processed_)) {
 704     Send(new AutofillHostMsg_FormsSeen(routing_id(), forms,
 705                                        forms_seen_timestamp));
 706   }
 707
 708   if (!frame.parent())
 709     main_frame_processed_ = true;
 710 }
 711
 712 void AutofillAgent::HidePopup() {
 713   if (!is_popup_possibly_visible_)
 714     return;
 715
 716   if (!element_.isNull())
 717     OnClearPreviewedForm();
 718
 719   is_popup_possibly_visible_ = false;
 720   Send(new AutofillHostMsg_HidePopup(routing_id()));
 721 }
 722
 723 void AutofillAgent::didAssociateFormControls(const WebVector<WebNode>& nodes) {
 724   for (size_t i = 0; i < nodes.size(); ++i) {
 725     WebLocalFrame* frame = nodes[i].document().frame();
 726     // Only monitors dynamic forms created in the top frame. Dynamic forms
 727     // inserted in iframes are not captured yet. Frame is only processed
 728     // if it has finished loading, otherwise you can end up with a partially
 729     // parsed form.
 730     if (frame && !frame->parent() && !frame->isLoading()) {
 731       ProcessForms(*frame);
 732       password_autofill_agent_->OnDynamicFormsSeen(frame);
 733       return;
 734     }
 735   }
 736 }
 737
 738 }  // namespace autofill