components/autofill/content/renderer/page_click_tracker.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_PAGE_CLICK_TRACKER_H_
   6 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PAGE_CLICK_TRACKER_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/public/renderer/render_frame_observer.h"
  13 #include "content/public/renderer/render_view_observer.h"
  14 #include "third_party/WebKit/public/web/WebNode.h"
  15
  16 namespace autofill {
  17
  18 class PageClickListener;
  19
  20 // This class is responsible notifying the associated listener when a node is
  21 // clicked or tapped. It also tracks whether a node was focused before the event
  22 // was handled.
  23 //
  24 // This is useful for password/form autofill where we want to trigger a
  25 // suggestion popup when a text input is clicked.
  26 //
  27 // There is one PageClickTracker per AutofillAgent.
  28 class PageClickTracker : public content::RenderFrameObserver {
  29  public:
  30   // The |listener| will be notified when an element is clicked.  It must
  31   // outlive this class.
  32   PageClickTracker(content::RenderFrame* render_frame,
  33                    PageClickListener* listener);
  34   ~PageClickTracker() override;
  35
  36  private:
  37   // TODO(estade): migrate this stuff to content::RenderFrameObserver, and
  38   // remove this class.
  39   class Legacy : public content::RenderViewObserver {
  40    public:
  41     Legacy(PageClickTracker* tracker);
  42
  43     // RenderViewObserver implementation.
  44     void OnDestruct() override;
  45     void OnMouseDown(const blink::WebNode& mouse_down_node) override;
  46     void FocusChangeComplete() override;
  47
  48    private:
  49     PageClickTracker* tracker_;
  50   };
  51   friend class Legacy;
  52
  53   // RenderFrameObserver implementation.
  54   void FocusedNodeChanged(const blink::WebNode& node) override;
  55
  56   // RenderViewObserver methods forwarded from Legacy. Should be
  57   // merged into RenderFrameObserver.
  58   void OnMouseDown(const blink::WebNode& mouse_down_node);
  59   void FocusChangeComplete();
  60   void DoFocusChangeComplete();
  61
  62   // True when the last click was on the focused node.
  63   bool focused_node_was_last_clicked_;
  64
  65   // This is set to false when the focus changes, then set back to true soon
  66   // afterwards. This helps track whether an event happened after a node was
  67   // already focused, or if it caused the focus to change.
  68   bool was_focused_before_now_;
  69
  70   // The listener getting the actual notifications.
  71   PageClickListener* listener_;
  72
  73   Legacy legacy_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(PageClickTracker);
  76 };
  77
  78 }  // namespace autofill
  79
  80 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PAGE_CLICK_TRACKER_H_