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// Copyright 2014 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 "components/html_viewer/ax_provider_impl.h"
#include "components/html_viewer/blink_basic_type_converters.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/web/WebAXObject.h"
#include "third_party/WebKit/public/web/WebSettings.h"
#include "third_party/WebKit/public/web/WebView.h"
using blink::WebAXObject;
using blink::WebURL;
using blink::WebView;
using mojo::Array;
using mojo::AxNodePtr;
using mojo::String;
namespace html_viewer {
AxProviderImpl::AxProviderImpl(WebView* web_view) : web_view_(web_view) {
}
void AxProviderImpl::GetTree(
const mojo::Callback<void(Array<AxNodePtr> nodes)>& callback) {
web_view_->settings()->setAccessibilityEnabled(true);
web_view_->settings()->setInlineTextBoxAccessibilityEnabled(true);
Array<AxNodePtr> result;
Populate(web_view_->accessibilityObject(), 0, 0, &result);
callback.Run(result.Pass());
}
int AxProviderImpl::Populate(const WebAXObject& ax_object,
int parent_id,
int next_sibling_id,
Array<AxNodePtr>* result) {
AxNodePtr ax_node(ConvertAxNode(ax_object, parent_id, next_sibling_id));
int ax_node_id = ax_node->id;
if (ax_node.is_null())
return 0;
result->push_back(ax_node.Pass());
unsigned num_children = ax_object.childCount();
next_sibling_id = 0;
for (unsigned i = 0; i < num_children; ++i) {
int new_id = Populate(ax_object.childAt(num_children - i - 1),
ax_node_id,
next_sibling_id,
result);
if (new_id != 0)
next_sibling_id = new_id;
}
return ax_node_id;
}
AxNodePtr AxProviderImpl::ConvertAxNode(const WebAXObject& ax_object,
int parent_id,
int next_sibling_id) {
AxNodePtr result;
if (!const_cast<WebAXObject&>(ax_object).updateLayoutAndCheckValidity())
return result.Pass();
result = mojo::AxNode::New();
result->id = static_cast<int>(ax_object.axID());
result->parent_id = parent_id;
result->next_sibling_id = next_sibling_id;
result->bounds = mojo::Rect::From(ax_object.boundingBoxRect());
if (ax_object.isAnchor()) {
result->link = mojo::AxLink::New();
result->link->url = String::From(ax_object.url().string());
} else if (ax_object.childCount() == 0 &&
!ax_object.stringValue().isEmpty()) {
result->text = mojo::AxText::New();
result->text->content = String::From(ax_object.stringValue());
}
return result.Pass();
}
} // namespace html_viewer
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