components/autofill/content/renderer/form_cache.h

   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 #ifndef COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_CACHE_H_
   6 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_CACHE_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <vector>
  11
  12 #include "base/strings/string16.h"
  13 #include "components/autofill/core/common/form_data.h"
  14
  15 namespace blink {
  16 class WebDocument;
  17 class WebElement;
  18 class WebElementCollection;
  19 class WebFormControlElement;
  20 class WebFrame;
  21 class WebInputElement;
  22 class WebSelectElement;
  23 }
  24
  25 namespace autofill {
  26
  27 struct FormDataPredictions;
  28
  29 // Manages the forms in a single RenderFrame.
  30 class FormCache {
  31  public:
  32   explicit FormCache(const blink::WebFrame& frame);
  33   ~FormCache();
  34
  35   // Scans the DOM in |frame_| extracting and storing forms that have not been
  36   // seen before. Returns the extracted forms.
  37   std::vector<FormData> ExtractNewForms();
  38
  39   // Resets the forms.
  40   void Reset();
  41
  42   // Clears the values of all input elements in the form that contains
  43   // |element|.  Returns false if the form is not found.
  44   bool ClearFormWithElement(const blink::WebFormControlElement& element);
  45
  46   // For each field in the |form|, sets the field's placeholder text to the
  47   // field's overall predicted type.  Also sets the title to include the field's
  48   // heuristic type, server type, and signature; as well as the form's signature
  49   // and the experiment id for the server predictions.
  50   bool ShowPredictions(const FormDataPredictions& form);
  51
  52  private:
  53   // Scans |control_elements| and returns the number of editable elements.
  54   // Also remembers the initial <select> and <input> element states, and
  55   // logs warning messages for deprecated attribute if
  56   // |log_deprecation_messages| is set.
  57   size_t ScanFormControlElements(
  58       const std::vector<blink::WebFormControlElement>& control_elements,
  59       bool log_deprecation_messages);
  60
  61   // The frame this FormCache is associated with.
  62   const blink::WebFrame& frame_;
  63
  64   // The cached forms. Used to prevent re-extraction of forms.
  65   std::set<FormData> parsed_forms_;
  66
  67   // The synthetic FormData is for all the fieldsets in the document without a
  68   // form owner.
  69   FormData synthetic_form_;
  70
  71   // The cached initial values for <select> elements.
  72   std::map<const blink::WebSelectElement, base::string16>
  73       initial_select_values_;
  74
  75   // The cached initial values for checkable <input> elements.
  76   std::map<const blink::WebInputElement, bool> initial_checked_state_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(FormCache);
  79 };
  80
  81 }  // namespace autofill
  82
  83 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_CACHE_H_