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| 1 // Copyright 2014 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 #include "components/html_viewer/ax_provider_impl.h" | |
| 6 | |
| 7 #include <utility> | |
| 8 | |
| 9 #include "components/html_viewer/blink_basic_type_converters.h" | |
| 10 #include "third_party/WebKit/public/platform/WebURL.h" | |
| 11 #include "third_party/WebKit/public/web/WebAXObject.h" | |
| 12 #include "third_party/WebKit/public/web/WebSettings.h" | |
| 13 #include "third_party/WebKit/public/web/WebView.h" | |
| 14 | |
| 15 using blink::WebAXObject; | |
| 16 using blink::WebURL; | |
| 17 using blink::WebView; | |
| 18 | |
| 19 using mojo::Array; | |
| 20 using mojo::AxNodePtr; | |
| 21 using mojo::String; | |
| 22 | |
| 23 namespace html_viewer { | |
| 24 | |
| 25 AxProviderImpl::AxProviderImpl(WebView* web_view, | |
| 26 mojo::InterfaceRequest<mojo::AxProvider> request) | |
| 27 : web_view_(web_view), binding_(this, std::move(request)) {} | |
| 28 | |
| 29 AxProviderImpl::~AxProviderImpl() { | |
| 30 } | |
| 31 | |
| 32 void AxProviderImpl::GetTree( | |
| 33 const mojo::Callback<void(Array<AxNodePtr> nodes)>& callback) { | |
| 34 web_view_->settings()->setAccessibilityEnabled(true); | |
| 35 web_view_->settings()->setInlineTextBoxAccessibilityEnabled(true); | |
| 36 | |
| 37 Array<AxNodePtr> result; | |
| 38 Populate(web_view_->accessibilityObject(), 0, 0, &result); | |
| 39 callback.Run(std::move(result)); | |
| 40 } | |
| 41 | |
| 42 int AxProviderImpl::Populate(const WebAXObject& ax_object, | |
| 43 int parent_id, | |
| 44 int next_sibling_id, | |
| 45 Array<AxNodePtr>* result) { | |
| 46 AxNodePtr ax_node(ConvertAxNode(ax_object, parent_id, next_sibling_id)); | |
| 47 int ax_node_id = ax_node->id; | |
| 48 if (ax_node.is_null()) | |
| 49 return 0; | |
| 50 | |
| 51 result->push_back(std::move(ax_node)); | |
| 52 | |
| 53 unsigned num_children = ax_object.childCount(); | |
| 54 next_sibling_id = 0; | |
| 55 for (unsigned i = 0; i < num_children; ++i) { | |
| 56 int new_id = Populate(ax_object.childAt(num_children - i - 1), | |
| 57 ax_node_id, | |
| 58 next_sibling_id, | |
| 59 result); | |
| 60 if (new_id != 0) | |
| 61 next_sibling_id = new_id; | |
| 62 } | |
| 63 | |
| 64 return ax_node_id; | |
| 65 } | |
| 66 | |
| 67 AxNodePtr AxProviderImpl::ConvertAxNode(const WebAXObject& ax_object, | |
| 68 int parent_id, | |
| 69 int next_sibling_id) { | |
| 70 AxNodePtr result; | |
| 71 if (!const_cast<WebAXObject&>(ax_object).updateLayoutAndCheckValidity()) | |
| 72 return result; | |
| 73 | |
| 74 result = mojo::AxNode::New(); | |
| 75 result->id = static_cast<int>(ax_object.axID()); | |
| 76 result->parent_id = parent_id; | |
| 77 result->next_sibling_id = next_sibling_id; | |
| 78 result->bounds = mojo::Rect::From(ax_object.boundingBoxRect()); | |
| 79 | |
| 80 if (ax_object.isAnchor()) { | |
| 81 result->link = mojo::AxLink::New(); | |
| 82 result->link->url = String::From(ax_object.url().string()); | |
| 83 } else if (ax_object.childCount() == 0) { | |
| 84 blink::WebString name = ax_object.name(); | |
| 85 if (!name.isEmpty()) { | |
| 86 result->text = mojo::AxText::New(); | |
| 87 result->text->content = String::From(name); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 return result; | |
| 92 } | |
| 93 | |
| 94 } // namespace html_viewer | |
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