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      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 
     14 namespace blink {
     15 class WebDocument;
     16 class WebFormControlElement;
     17 class WebFormElement;
     18 class WebFrame;
     19 class WebInputElement;
     20 class WebSelectElement;
     21 }
     22 
     23 namespace autofill {
     24 
     25 struct FormData;
     26 struct FormDataPredictions;
     27 
     28 // Manages the forms in a RenderView.
     29 class FormCache {
     30  public:
     31   FormCache();
     32   ~FormCache();
     33 
     34   // Scans the DOM in |frame| extracting and storing forms that have not been
     35   // seen before. Fills |forms| with extracted forms.
     36   void ExtractNewForms(const blink::WebFrame& frame,
     37                        std::vector<FormData>* forms);
     38 
     39   // Resets the forms for the specified |frame|.
     40   void ResetFrame(const blink::WebFrame& frame);
     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   // The cached web frames.
     54   std::set<blink::WebDocument> web_documents_;
     55 
     56   // The cached forms per frame. Used to prevent re-extraction of forms.
     57   std::map<const blink::WebFrame*, std::set<FormData> > parsed_forms_;
     58 
     59   // The cached initial values for <select> elements.
     60   std::map<const blink::WebSelectElement, base::string16>
     61       initial_select_values_;
     62 
     63   // The cached initial values for checkable <input> elements.
     64   std::map<const blink::WebInputElement, bool> initial_checked_state_;
     65 
     66   DISALLOW_COPY_AND_ASSIGN(FormCache);
     67 };
     68 
     69 }  // namespace autofill
     70 
     71 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_CACHE_H_
     72