| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/public/web/web_ax_context.h" |
| |
| #include "third_party/blink/public/web/web_document.h" |
| #include "third_party/blink/renderer/core/accessibility/ax_context.h" |
| #include "third_party/blink/renderer/core/accessibility/ax_object_cache.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/modules/accessibility/ax_object_cache_impl.h" |
| |
| namespace blink { |
| |
| WebAXContext::WebAXContext(WebDocument root_document) |
| : private_(new AXContext(*root_document.Unwrap<Document>())) {} |
| |
| WebAXContext::~WebAXContext() {} |
| |
| WebAXObject WebAXContext::Root() const { |
| // It is an error to call AXContext::GetAXObjectCache() if the underlying |
| // document is no longer active, so early return in that case to prevent |
| // crashes that might otherwise happen in some cases (see crbug.com/1094576). |
| if (!private_->HasActiveDocument()) |
| return WebAXObject(); |
| |
| // Make sure that layout is updated before a root ax object is created. |
| WebAXObject::UpdateLayout(WebDocument(private_->GetDocument())); |
| |
| return WebAXObject( |
| static_cast<AXObjectCacheImpl*>(&private_->GetAXObjectCache())->Root()); |
| } |
| |
| } // namespace blink |
