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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_AUTOFILL_AGENT_H_
      6 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_
      7 
      8 #include <vector>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/gtest_prod_util.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "base/time/time.h"
     15 #include "base/timer/timer.h"
     16 #include "components/autofill/content/renderer/form_cache.h"
     17 #include "components/autofill/content/renderer/page_click_listener.h"
     18 #include "content/public/renderer/render_view_observer.h"
     19 #include "third_party/WebKit/public/web/WebAutofillClient.h"
     20 #include "third_party/WebKit/public/web/WebFormControlElement.h"
     21 #include "third_party/WebKit/public/web/WebFormElement.h"
     22 #include "third_party/WebKit/public/web/WebInputElement.h"
     23 
     24 namespace blink {
     25 class WebNode;
     26 class WebView;
     27 struct WebAutocompleteParams;
     28 }
     29 
     30 namespace autofill {
     31 
     32 struct FormData;
     33 struct FormFieldData;
     34 struct WebElementDescriptor;
     35 class PasswordAutofillAgent;
     36 class PasswordGenerationAgent;
     37 
     38 // AutofillAgent deals with Autofill related communications between WebKit and
     39 // the browser.  There is one AutofillAgent per RenderView.
     40 // This code was originally part of RenderView.
     41 // Note that Autofill encompasses:
     42 // - single text field suggestions, that we usually refer to as Autocomplete,
     43 // - password form fill, refered to as Password Autofill, and
     44 // - entire form fill based on one field entry, referred to as Form Autofill.
     45 
     46 class AutofillAgent : public content::RenderViewObserver,
     47                       public PageClickListener,
     48                       public blink::WebAutofillClient {
     49  public:
     50   // PasswordAutofillAgent is guaranteed to outlive AutofillAgent.
     51   // PasswordGenerationAgent may be NULL. If it is not, then it is also
     52   // guaranteed to outlive AutofillAgent.
     53   AutofillAgent(content::RenderView* render_view,
     54                 PasswordAutofillAgent* password_autofill_manager,
     55                 PasswordGenerationAgent* password_generation_agent);
     56   virtual ~AutofillAgent();
     57 
     58  private:
     59   // content::RenderViewObserver:
     60   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     61   virtual void DidFinishDocumentLoad(blink::WebLocalFrame* frame) OVERRIDE;
     62   virtual void DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
     63                                         bool is_new_navigation) OVERRIDE;
     64   virtual void FrameDetached(blink::WebFrame* frame) OVERRIDE;
     65   virtual void FrameWillClose(blink::WebFrame* frame) OVERRIDE;
     66   virtual void WillSubmitForm(blink::WebLocalFrame* frame,
     67                               const blink::WebFormElement& form) OVERRIDE;
     68   virtual void DidChangeScrollOffset(blink::WebLocalFrame* frame) OVERRIDE;
     69   virtual void FocusedNodeChanged(const blink::WebNode& node) OVERRIDE;
     70   virtual void OrientationChangeEvent() OVERRIDE;
     71   virtual void Resized() OVERRIDE;
     72 
     73   // PageClickListener:
     74   virtual void FormControlElementClicked(
     75       const blink::WebFormControlElement& element,
     76       bool was_focused) OVERRIDE;
     77 
     78   // blink::WebAutofillClient:
     79   virtual void textFieldDidEndEditing(
     80       const blink::WebInputElement& element);
     81   virtual void textFieldDidChange(
     82       const blink::WebFormControlElement& element);
     83   virtual void textFieldDidReceiveKeyDown(
     84       const blink::WebInputElement& element,
     85       const blink::WebKeyboardEvent& event);
     86   virtual void didRequestAutocomplete(
     87       const blink::WebFormElement& form);
     88   virtual void setIgnoreTextChanges(bool ignore);
     89   virtual void didAssociateFormControls(
     90       const blink::WebVector<blink::WebNode>& nodes);
     91   virtual void openTextDataListChooser(const blink::WebInputElement& element);
     92   virtual void firstUserGestureObserved();
     93 
     94   void OnFieldTypePredictionsAvailable(
     95       const std::vector<FormDataPredictions>& forms);
     96   void OnFillForm(int query_id, const FormData& form);
     97   void OnPing();
     98   void OnPreviewForm(int query_id, const FormData& form);
     99 
    100   // For external Autofill selection.
    101   void OnClearForm();
    102   void OnClearPreviewedForm();
    103   void OnFillFieldWithValue(const base::string16& value);
    104   void OnPreviewFieldWithValue(const base::string16& value);
    105   void OnAcceptDataListSuggestion(const base::string16& value);
    106   void OnFillPasswordSuggestion(const base::string16& username,
    107                                 const base::string16& password);
    108   void OnPreviewPasswordSuggestion(const base::string16& username,
    109                                    const base::string16& password);
    110 
    111   // Called when interactive autocomplete finishes. |message| is printed to
    112   // the console if non-empty.
    113   void OnRequestAutocompleteResult(
    114       blink::WebFormElement::AutocompleteResult result,
    115       const base::string16& message,
    116       const FormData& form_data);
    117 
    118   // Called when an autocomplete request succeeds or fails with the |result|.
    119   void FinishAutocompleteRequest(
    120       blink::WebFormElement::AutocompleteResult result);
    121 
    122   // Called in a posted task by textFieldDidChange() to work-around a WebKit bug
    123   // http://bugs.webkit.org/show_bug.cgi?id=16976
    124   void TextFieldDidChangeImpl(const blink::WebFormControlElement& element);
    125 
    126   // Shows the autofill suggestions for |element|.
    127   // This call is asynchronous and may or may not lead to the showing of a
    128   // suggestion popup (no popup is shown if there are no available suggestions).
    129   // |autofill_on_empty_values| specifies whether suggestions should be shown
    130   // when |element| contains no text.
    131   // |requires_caret_at_end| specifies whether suggestions should be shown when
    132   // the caret is not after the last character in |element|.
    133   // |display_warning_if_disabled| specifies whether a warning should be
    134   // displayed to the user if Autofill has suggestions available, but cannot
    135   // fill them because it is disabled (e.g. when trying to fill a credit card
    136   // form on a non-secure website).
    137   // |datalist_only| specifies whether all of <datalist> suggestions and no
    138   // autofill suggestions are shown. |autofill_on_empty_values| and
    139   // |requires_caret_at_end| are ignored if |datalist_only| is true.
    140   // |show_full_suggestion_list| specifies that all autofill suggestions should
    141   // be shown and none should be elided because of the current value of
    142   // |element| (relevant for inline autocomplete).
    143   // |show_password_suggestions_only| specifies that only show a suggestions box
    144   // if |element| is part of a password form, otherwise show no suggestions.
    145   void ShowSuggestions(const blink::WebFormControlElement& element,
    146                        bool autofill_on_empty_values,
    147                        bool requires_caret_at_end,
    148                        bool display_warning_if_disabled,
    149                        bool datalist_only,
    150                        bool show_full_suggestion_list,
    151                        bool show_password_suggestions_only);
    152 
    153   // Queries the browser for Autocomplete and Autofill suggestions for the given
    154   // |element|.
    155   void QueryAutofillSuggestions(const blink::WebFormControlElement& element,
    156                                 bool display_warning_if_disabled,
    157                                 bool datalist_only);
    158 
    159   // Sets the element value to reflect the selected |suggested_value|.
    160   void AcceptDataListSuggestion(const base::string16& suggested_value);
    161 
    162   // Fills |form| and |field| with the FormData and FormField corresponding to
    163   // |node|. Returns true if the data was found; and false otherwise.
    164   bool FindFormAndFieldForNode(
    165       const blink::WebNode& node,
    166       FormData* form,
    167       FormFieldData* field) WARN_UNUSED_RESULT;
    168 
    169   // Set |node| to display the given |value|.
    170   void FillFieldWithValue(const base::string16& value,
    171                           blink::WebInputElement* node);
    172 
    173   // Set |node| to display the given |value| as a preview.  The preview is
    174   // visible on screen to the user, but not visible to the page via the DOM or
    175   // JavaScript.
    176   void PreviewFieldWithValue(const base::string16& value,
    177                              blink::WebInputElement* node);
    178 
    179   // Notifies browser of new fillable forms in |frame|.
    180   void ProcessForms(const blink::WebLocalFrame& frame);
    181 
    182   // Hides any currently showing Autofill popup.
    183   void HidePopup();
    184 
    185   FormCache form_cache_;
    186 
    187   PasswordAutofillAgent* password_autofill_agent_;  // Weak reference.
    188   PasswordGenerationAgent* password_generation_agent_;  // Weak reference.
    189 
    190   // The ID of the last request sent for form field Autofill.  Used to ignore
    191   // out of date responses.
    192   int autofill_query_id_;
    193 
    194   // The element corresponding to the last request sent for form field Autofill.
    195   blink::WebFormControlElement element_;
    196 
    197   // The form element currently requesting an interactive autocomplete.
    198   blink::WebFormElement in_flight_request_form_;
    199 
    200   // Pointer to the WebView. Used to access page scale factor.
    201   blink::WebView* web_view_;
    202 
    203   // Should we display a warning if autofill is disabled?
    204   bool display_warning_if_disabled_;
    205 
    206   // Was the query node autofilled prior to previewing the form?
    207   bool was_query_node_autofilled_;
    208 
    209   // Have we already shown Autofill suggestions for the field the user is
    210   // currently editing?  Used to keep track of state for metrics logging.
    211   bool has_shown_autofill_popup_for_current_edit_;
    212 
    213   // If true we just set the node text so we shouldn't show the popup.
    214   bool did_set_node_text_;
    215 
    216   // Whether or not to ignore text changes.  Useful for when we're committing
    217   // a composition when we are defocusing the WebView and we don't want to
    218   // trigger an autofill popup to show.
    219   bool ignore_text_changes_;
    220 
    221   // Whether the Autofill popup is possibly visible.  This is tracked as a
    222   // performance improvement, so that the IPC channel isn't flooded with
    223   // messages to close the Autofill popup when it can't possibly be showing.
    224   bool is_popup_possibly_visible_;
    225 
    226   // True if a message has already been sent about forms for the main frame.
    227   // When the main frame is first loaded, a message is sent even if no forms
    228   // exist in the frame. Otherwise, such messages are supressed.
    229   bool main_frame_processed_;
    230 
    231   base::WeakPtrFactory<AutofillAgent> weak_ptr_factory_;
    232 
    233   DISALLOW_COPY_AND_ASSIGN(AutofillAgent);
    234 };
    235 
    236 }  // namespace autofill
    237 
    238 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_
    239