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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 WebKit {
     15 class WebDocument;
     16 class WebFormElement;
     17 class WebFrame;
     18 class WebInputElement;
     19 class WebSelectElement;
     20 }
     21 
     22 namespace autofill {
     23 
     24 struct FormData;
     25 struct FormDataPredictions;
     26 
     27 // Manages the forms in a RenderView.
     28 class FormCache {
     29  public:
     30   FormCache();
     31   ~FormCache();
     32 
     33   // Scans the DOM in |frame| extracting and storing forms.
     34   // Fills |forms| with extracted forms.
     35   void ExtractForms(const WebKit::WebFrame& frame,
     36                     std::vector<FormData>* forms);
     37 
     38   // Scans the DOM in |frame| extracting and storing forms.
     39   // Fills |forms| with extracted forms and |web_form_elements| with associated
     40   // web form elements. Returns true if there are unextracted forms due to
     41   // |minimum_required_fields| limit, else false.
     42   bool ExtractFormsAndFormElements(
     43       const WebKit::WebFrame& frame,
     44       size_t minimum_required_fields,
     45       std::vector<FormData>* forms,
     46       std::vector<WebKit::WebFormElement>* web_form_elements);
     47 
     48   // Resets the forms for the specified |frame|.
     49   void ResetFrame(const WebKit::WebFrame& frame);
     50 
     51   // Clears the values of all input elements in the form that contains
     52   // |element|.  Returns false if the form is not found.
     53   bool ClearFormWithElement(const WebKit::WebInputElement& element);
     54 
     55   // For each field in the |form|, sets the field's placeholder text to the
     56   // field's overall predicted type.  Also sets the title to include the field's
     57   // heuristic type, server type, and signature; as well as the form's signature
     58   // and the experiment id for the server predictions.
     59   bool ShowPredictions(const FormDataPredictions& form);
     60 
     61  private:
     62   // The cached web frames.
     63   std::set<WebKit::WebDocument> web_documents_;
     64 
     65   // The cached initial values for <select> elements.
     66   std::map<const WebKit::WebSelectElement, base::string16>
     67       initial_select_values_;
     68 
     69   // The cached initial values for checkable <input> elements.
     70   std::map<const WebKit::WebInputElement, bool> initial_checked_state_;
     71 
     72   DISALLOW_COPY_AND_ASSIGN(FormCache);
     73 };
     74 
     75 }  // namespace autofill
     76 
     77 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_CACHE_H_
     78