15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#ifndef CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ 62a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#include <set> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 117d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)#include "base/containers/hash_tables.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/weak_ptr.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/renderer/render_view_observer.h" 14c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch#include "content/renderer/accessibility/blink_ax_tree_source.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "content/renderer/accessibility/renderer_accessibility.h" 1658537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)#include "third_party/WebKit/public/web/WebAXEnums.h" 1758537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)#include "third_party/WebKit/public/web/WebAXObject.h" 185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/accessibility/ax_node_data.h" 19c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch#include "ui/accessibility/ax_tree_serializer.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 21f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)namespace blink { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class WebDocument; 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class WebNode; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class RenderViewImpl; 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This is the subclass of RendererAccessibility that implements 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// complete accessibility support for assistive technology (as opposed to 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// partial support - see RendererAccessibilityFocusOnly). 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 33effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch// This version turns on Blink's accessibility code and sends 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// a serialized representation of that tree whenever it changes. It also 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// handles requests from the browser to perform accessibility actions on 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// nodes in the tree (e.g., change focus, or click on a button). 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)class CONTENT_EXPORT RendererAccessibilityComplete 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : public RendererAccessibility { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 40116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch explicit RendererAccessibilityComplete(RenderFrameImpl* render_frame); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~RendererAccessibilityComplete(); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 43116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // RenderFrameObserver implementation. 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // RendererAccessibility. 4758537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) virtual void HandleWebAccessibilityEvent( 48f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const blink::WebAXObject& obj, blink::WebAXEvent event) OVERRIDE; 49effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch virtual RendererAccessibilityType GetType() OVERRIDE; 50116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch virtual void FocusedNodeChanged(const blink::WebNode& node) OVERRIDE; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 525d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) void HandleAXEvent(const blink::WebAXObject& obj, ui::AXEvent event); 535d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) protected: 5558537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) // Send queued events from the renderer to the browser. 5658537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) void SendPendingAccessibilityEvents(); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 58c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Check the entire accessibility tree to see if any nodes have 59c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // changed location, by comparing their locations to the cached 605d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // versions. If any have moved, send an IPC with the new locations. 615d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) void SendLocationChanges(); 62c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) private: 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Handlers for messages from the browser to the renderer. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnDoDefaultAction(int acc_obj_id); 6658537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) void OnEventsAck(); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnChangeScrollPosition(int acc_obj_id, int scroll_x, int scroll_y); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnScrollToMakeVisible(int acc_obj_id, gfx::Rect subfocus); 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnScrollToPoint(int acc_obj_id, gfx::Point point); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnSetFocus(int acc_obj_id); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void OnSetTextSelection(int acc_obj_id, int start_offset, int end_offset); 72cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void OnHitTest(gfx::Point point); 7329b820f8d84e3bc97d62552e54923c42407f2f29Ben Murdoch void OnReset(int reset_token); 742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void OnFatalError(); 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 76effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch // Events from Blink are collected until they are ready to be 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sent to the browser. 7858537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) std::vector<AccessibilityHostMsg_EventParams> pending_events_; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 80c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch // The adapter that exposes Blink's accessibility tree to AXTreeSerializer. 81c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch BlinkAXTreeSource tree_source_; 82c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch 83c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch // The serializer that sends accessibility messages to the browser process. 84c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch ui::AXTreeSerializer<blink::WebAXObject> serializer_; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 86c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch // Current location of every object, so we can detect when it moves. 87c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch base::hash_map<int, gfx::Rect> locations_; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The most recently observed scroll offset of the root document element. 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(dmazzoni): remove once https://bugs.webkit.org/show_bug.cgi?id=73460 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // is fixed. 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Size last_scroll_offset_; 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9458537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles) // Set if we are waiting for an accessibility event ack. 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool ack_pending_; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9729b820f8d84e3bc97d62552e54923c42407f2f29Ben Murdoch // Nonzero if the browser requested we reset the accessibility state. 9829b820f8d84e3bc97d62552e54923c42407f2f29Ben Murdoch // We need to return this token in the next IPC. 9929b820f8d84e3bc97d62552e54923c42407f2f29Ben Murdoch int reset_token_; 10029b820f8d84e3bc97d62552e54923c42407f2f29Ben Murdoch 1011320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // So we can queue up tasks to be executed later. 1021320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci base::WeakPtrFactory<RendererAccessibilityComplete> weak_factory_; 1031320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(RendererAccessibilityComplete); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif // CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 110