Move remaining Autofill code to //components/autofill.

chrome/renderer/autofill/form_cache.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/renderer/autofill/form_cache.h"
-
-#include "base/logging.h"
-#include "base/utf_string_conversions.h"
-#include "chrome/renderer/autofill/form_autofill_util.h"
-#include "components/autofill/common/form_data.h"
-#include "components/autofill/common/form_data_predictions.h"
-#include "components/autofill/common/form_field_data.h"
-#include "components/autofill/common/form_field_data_predictions.h"
-#include "grit/generated_resources.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebVector.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebFormControlElement.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebFormElement.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputElement.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebSelectElement.h"
-#include "ui/base/l10n/l10n_util.h"
-
-using WebKit::WebDocument;
-using WebKit::WebFormControlElement;
-using WebKit::WebFormElement;
-using WebKit::WebFrame;
-using WebKit::WebInputElement;
-using WebKit::WebSelectElement;
-using WebKit::WebString;
-using WebKit::WebVector;
-
-namespace {
-
-// The number of fields required by Autofill.  Ideally we could send the forms
-// to Autofill no matter how many fields are in the forms; however, finding the
-// label for each field is a costly operation and we can't spare the cycles if
-// it's not necessary.
-const size_t kRequiredAutofillFields = 3;
-
-}  // namespace
-
-namespace autofill {
-
-// Helper function to discard state of various WebFormElements when they go out
-// of web frame's scope. This is done to release memory that we no longer need
-// to hold.
-// K should inherit from WebFormControlElement as the function looks to extract
-// WebFormElement for K.form().
-template <class K, class V>
-void RemoveOldElements(const WebFrame& frame, std::map<const K, V>* states) {
-  std::vector<K> to_remove;
-  for (typename std::map<const K, V>::const_iterator it = states->begin();
-       it != states->end(); ++it) {
-    WebFormElement form_element = it->first.form();
-    if (form_element.isNull()) {
-      to_remove.push_back(it->first);
-    } else {
-      const WebFrame* element_frame = form_element.document().frame();
-      if (!element_frame || element_frame == &frame)
-        to_remove.push_back(it->first);
-    }
-  }
-
-  for (typename std::vector<K>::const_iterator it = to_remove.begin();
-       it != to_remove.end(); ++it) {
-    states->erase(*it);
-  }
-}
-
-FormCache::FormCache() {
-}
-
-FormCache::~FormCache() {
-}
-
-void FormCache::ExtractForms(const WebFrame& frame,
-                             std::vector<FormData>* forms) {
-  ExtractFormsAndFormElements(frame, forms, NULL);
-}
-
-void FormCache::ExtractFormsAndFormElements(
-    const WebFrame& frame,
-    std::vector<FormData>* forms,
-    std::vector<WebFormElement>* web_form_elements) {
-  // Reset the cache for this frame.
-  ResetFrame(frame);
-
-  WebDocument document = frame.document();
-  if (document.isNull())
-    return;
-
-  web_documents_.insert(document);
-
-  WebVector<WebFormElement> web_forms;
-  document.forms(web_forms);
-
-  size_t num_fields_seen = 0;
-  for (size_t i = 0; i < web_forms.size(); ++i) {
-    WebFormElement form_element = web_forms[i];
-
-    std::vector<WebFormControlElement> control_elements;
-    ExtractAutofillableElements(form_element, autofill::REQUIRE_NONE,
-                                &control_elements);
-
-    size_t num_editable_elements = 0;
-    for (size_t j = 0; j < control_elements.size(); ++j) {
-      WebFormControlElement element = control_elements[j];
-
-      // Save original values of <select> elements so we can restore them
-      // when |ClearFormWithNode()| is invoked.
-      if (IsSelectElement(element)) {
-        const WebSelectElement select_element =
-            element.toConst<WebSelectElement>();
-        initial_select_values_.insert(std::make_pair(select_element,
-                                                     select_element.value()));
-        ++num_editable_elements;
-      } else {
-        const WebInputElement input_element =
-            element.toConst<WebInputElement>();
-        if (IsCheckableElement(&input_element)) {
-          initial_checked_state_.insert(
-              std::make_pair(input_element, input_element.isChecked()));
-        } else {
-          ++num_editable_elements;
-        }
-      }
-    }
-
-    // To avoid overly expensive computation, we impose a minimum number of
-    // allowable fields.  The corresponding maximum number of allowable fields
-    // is imposed by WebFormElementToFormData().
-    if (num_editable_elements < kRequiredAutofillFields)
-      continue;
-
-    FormData form;
-    ExtractMask extract_mask =
-      static_cast<ExtractMask>(EXTRACT_VALUE | EXTRACT_OPTIONS);
-
-    if (!WebFormElementToFormData(form_element, WebFormControlElement(),
-                                  REQUIRE_NONE, extract_mask, &form, NULL)) {
-      continue;
-    }
-
-    num_fields_seen += form.fields.size();
-    if (num_fields_seen > kMaxParseableFields)
-      break;
-
-    if (form.fields.size() >= kRequiredAutofillFields) {
-      forms->push_back(form);
-      if (web_form_elements)
-        web_form_elements->push_back(form_element);
-    }
-  }
-}
-
-void FormCache::ResetFrame(const WebFrame& frame) {
-  std::vector<WebDocument> documents_to_delete;
-  for (std::set<WebDocument>::const_iterator it = web_documents_.begin();
-       it != web_documents_.end(); ++it) {
-    const WebFrame* document_frame = it->frame();
-    if (!document_frame || document_frame == &frame)
-      documents_to_delete.push_back(*it);
-  }
-
-  for (std::vector<WebDocument>::const_iterator it =
-           documents_to_delete.begin();
-       it != documents_to_delete.end(); ++it) {
-    web_documents_.erase(*it);
-  }
-
-  RemoveOldElements(frame, &initial_select_values_);
-  RemoveOldElements(frame, &initial_checked_state_);
-}
-
-bool FormCache::ClearFormWithElement(const WebInputElement& element) {
-  WebFormElement form_element = element.form();
-  if (form_element.isNull())
-    return false;
-
-  std::vector<WebFormControlElement> control_elements;
-  ExtractAutofillableElements(form_element, autofill::REQUIRE_NONE,
-                              &control_elements);
-  for (size_t i = 0; i < control_elements.size(); ++i) {
-    WebFormControlElement control_element = control_elements[i];
-    WebInputElement* input_element = toWebInputElement(&control_element);
-    if (IsTextInput(input_element)) {
-      // We don't modify the value of disabled fields.
-      if (!input_element->isEnabled())
-        continue;
-
-      input_element->setValue(string16(), true);
-      input_element->setAutofilled(false);
-
-      // Clearing the value in the focused node (above) can cause selection
-      // to be lost. We force selection range to restore the text cursor.
-      if (element == *input_element) {
-        int length = input_element->value().length();
-        input_element->setSelectionRange(length, length);
-      }
-    } else if (IsSelectElement(control_element)) {
-      WebSelectElement select_element = control_element.to<WebSelectElement>();
-
-      std::map<const WebSelectElement, string16>::const_iterator
-          initial_value_iter = initial_select_values_.find(select_element);
-      if (initial_value_iter != initial_select_values_.end() &&
-          select_element.value() != initial_value_iter->second) {
-        select_element.setValue(initial_value_iter->second);
-        select_element.dispatchFormControlChangeEvent();
-      }
-    } else {
-      WebInputElement input_element = control_element.to<WebInputElement>();
-      DCHECK(IsCheckableElement(&input_element));
-      std::map<const WebInputElement, bool>::const_iterator it =
-          initial_checked_state_.find(input_element);
-      if (it != initial_checked_state_.end() &&
-          input_element.isChecked() != it->second) {
-        input_element.setChecked(it->second, true);
-      }
-    }
-  }
-
-  return true;
-}
-
-bool FormCache::ShowPredictions(const FormDataPredictions& form) {
-  DCHECK_EQ(form.data.fields.size(), form.fields.size());
-
-  // Find the form.
-  bool found_form = false;
-  WebFormElement form_element;
-  for (std::set<WebDocument>::const_iterator it = web_documents_.begin();
-       it != web_documents_.end() && !found_form; ++it) {
-    WebVector<WebFormElement> web_forms;
-    it->forms(web_forms);
-
-    for (size_t i = 0; i < web_forms.size(); ++i) {
-      form_element = web_forms[i];
-
-      // Note: matching on the form name here which is not guaranteed to be
-      // unique for the page, nor is it guaranteed to be non-empty.  Ideally, we
-      // would have a way to uniquely identify the form cross-process.  For now,
-      // we'll check form name and form action for identity.
-      // Also note that WebString() == WebString(string16()) does not evaluate
-      // to |true| -- WebKit distinguishes between a "null" string (lhs) and an
-      // "empty" string (rhs).  We don't want that distinction, so forcing to
-      // string16.
-      string16 element_name = GetFormIdentifier(form_element);
-      GURL action(form_element.document().completeURL(form_element.action()));
-      if (element_name == form.data.name && action == form.data.action) {
-        found_form = true;
-        break;
-      }
-    }
-  }
-
-  if (!found_form)
-    return false;
-
-  std::vector<WebFormControlElement> control_elements;
-  ExtractAutofillableElements(form_element, autofill::REQUIRE_NONE,
-                              &control_elements);
-  if (control_elements.size() != form.fields.size()) {
-    // Keep things simple.  Don't show predictions for forms that were modified
-    // between page load and the server's response to our query.
-    return false;
-  }
-
-  for (size_t i = 0; i < control_elements.size(); ++i) {
-    WebFormControlElement* element = &control_elements[i];
-
-    if (string16(element->nameForAutofill()) != form.data.fields[i].name) {
-      // Keep things simple.  Don't show predictions for elements whose names
-      // were modified between page load and the server's response to our query.
-      continue;
-    }
-
-    std::string placeholder = form.fields[i].overall_type;
-    string16 title = l10n_util::GetStringFUTF16(
-        IDS_AUTOFILL_SHOW_PREDICTIONS_TITLE,
-        UTF8ToUTF16(form.fields[i].heuristic_type),
-        UTF8ToUTF16(form.fields[i].server_type),
-        UTF8ToUTF16(form.fields[i].signature),
-        UTF8ToUTF16(form.signature),
-        UTF8ToUTF16(form.experiment_id));
-    if (!element->hasAttribute("placeholder"))
-      element->setAttribute("placeholder", WebString(UTF8ToUTF16(placeholder)));
-    element->setAttribute("title", WebString(title));
-  }
-
-  return true;
-}
-
-}  // namespace autofill