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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_PASSWORD_AUTOFILL_AGENT_H_
      6 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
      7 
      8 #include <map>
      9 #include <vector>
     10 
     11 #include "base/memory/weak_ptr.h"
     12 #include "components/autofill/core/common/password_form_fill_data.h"
     13 #include "content/public/renderer/render_view_observer.h"
     14 #include "third_party/WebKit/public/web/WebInputElement.h"
     15 
     16 namespace WebKit {
     17 class WebInputElement;
     18 class WebKeyboardEvent;
     19 class WebView;
     20 }
     21 
     22 namespace autofill {
     23 
     24 // This class is responsible for filling password forms.
     25 // There is one PasswordAutofillAgent per RenderView.
     26 class PasswordAutofillAgent : public content::RenderViewObserver {
     27  public:
     28   explicit PasswordAutofillAgent(content::RenderView* render_view);
     29   virtual ~PasswordAutofillAgent();
     30 
     31   // WebViewClient editor related calls forwarded by the RenderView.
     32   // If they return true, it indicates the event was consumed and should not
     33   // be used for any other autofill activity.
     34   bool TextFieldDidEndEditing(const WebKit::WebInputElement& element);
     35   bool TextDidChangeInTextField(const WebKit::WebInputElement& element);
     36   bool TextFieldHandlingKeyDown(const WebKit::WebInputElement& element,
     37                                 const WebKit::WebKeyboardEvent& event);
     38 
     39   // Fills the password associated with user name |value|. Returns true if the
     40   // username and password fields were filled, false otherwise.
     41   bool DidAcceptAutofillSuggestion(const WebKit::WebNode& node,
     42                                    const WebKit::WebString& value);
     43   // A no-op.  Password forms are not previewed, so they do not need to be
     44   // cleared when the selection changes.  However, this method returns
     45   // true when |node| is fillable by password Autofill.
     46   bool DidClearAutofillSelection(const WebKit::WebNode& node);
     47   // Shows an Autofill popup with username suggestions for |element|.
     48   // Returns true if any suggestions were shown, false otherwise.
     49   bool ShowSuggestions(const WebKit::WebInputElement& element);
     50 
     51  private:
     52   friend class PasswordAutofillAgentTest;
     53 
     54   enum OtherPossibleUsernamesUsage {
     55     NOTHING_TO_AUTOFILL,
     56     OTHER_POSSIBLE_USERNAMES_ABSENT,
     57     OTHER_POSSIBLE_USERNAMES_PRESENT,
     58     OTHER_POSSIBLE_USERNAME_SHOWN,
     59     OTHER_POSSIBLE_USERNAME_SELECTED,
     60     OTHER_POSSIBLE_USERNAMES_MAX
     61   };
     62 
     63   struct PasswordInfo {
     64     WebKit::WebInputElement password_field;
     65     PasswordFormFillData fill_data;
     66     bool backspace_pressed_last;
     67     PasswordInfo() : backspace_pressed_last(false) {}
     68   };
     69   typedef std::map<WebKit::WebElement, PasswordInfo> LoginToPasswordInfoMap;
     70 
     71   // RenderViewObserver:
     72   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     73   virtual void DidStartLoading() OVERRIDE;
     74   virtual void DidFinishDocumentLoad(WebKit::WebFrame* frame) OVERRIDE;
     75   virtual void DidFinishLoad(WebKit::WebFrame* frame) OVERRIDE;
     76   virtual void FrameDetached(WebKit::WebFrame* frame) OVERRIDE;
     77   virtual void FrameWillClose(WebKit::WebFrame* frame) OVERRIDE;
     78 
     79   // RenderView IPC handlers:
     80   void OnFillPasswordForm(const PasswordFormFillData& form_data);
     81 
     82   // Scans the given frame for password forms and sends them up to the browser.
     83   // If |only_visible| is true, only forms visible in the layout are sent.
     84   void SendPasswordForms(WebKit::WebFrame* frame, bool only_visible);
     85 
     86   void GetSuggestions(const PasswordFormFillData& fill_data,
     87                       const base::string16& input,
     88                       std::vector<base::string16>* suggestions,
     89                       std::vector<base::string16>* realms);
     90 
     91   bool ShowSuggestionPopup(const PasswordFormFillData& fill_data,
     92                            const WebKit::WebInputElement& user_input);
     93 
     94   bool FillUserNameAndPassword(
     95       WebKit::WebInputElement* username_element,
     96       WebKit::WebInputElement* password_element,
     97       const PasswordFormFillData& fill_data,
     98       bool exact_username_match,
     99       bool set_selection);
    100 
    101   // Fills |login_input| and |password| with the most relevant suggestion from
    102   // |fill_data| and shows a popup with other suggestions.
    103   void PerformInlineAutocomplete(
    104       const WebKit::WebInputElement& username,
    105       const WebKit::WebInputElement& password,
    106       const PasswordFormFillData& fill_data);
    107 
    108   // Invoked when the passed frame is closing.  Gives us a chance to clear any
    109   // reference we may have to elements in that frame.
    110   void FrameClosing(const WebKit::WebFrame* frame);
    111 
    112   // Finds login information for a |node| that was previously filled.
    113   bool FindLoginInfo(const WebKit::WebNode& node,
    114                      WebKit::WebInputElement* found_input,
    115                      PasswordInfo* found_password);
    116 
    117   // The logins we have filled so far with their associated info.
    118   LoginToPasswordInfoMap login_to_password_info_;
    119 
    120   // Used for UMA stats.
    121   OtherPossibleUsernamesUsage usernames_usage_;
    122 
    123   // Pointer to the WebView. Used to access page scale factor.
    124   WebKit::WebView* web_view_;
    125 
    126   base::WeakPtrFactory<PasswordAutofillAgent> weak_ptr_factory_;
    127 
    128   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);
    129 };
    130 
    131 }  // namespace autofill
    132 
    133 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
    134