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// Copyright (c) 2006-2008 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 "config.h"
#include "AXObjectCache.h"
#include "Document.h"
#include "Frame.h"
#include "RefPtr.h"
#undef LOG
#include "webkit/glue/webaccessibilitymanager_impl.h"
#include "webkit/glue/glue_accessibility_object.h"
#include "webkit/glue/glue_util.h"
#include "webkit/glue/webframe_impl.h"
#include "webkit/glue/webview_impl.h"
namespace webkit_glue {
// struct WebAccessibilityManagerImpl::GlueAccessibilityObjectRoot
struct WebAccessibilityManagerImpl::GlueAccessibilityObjectRoot {
GlueAccessibilityObjectRoot() {}
// Root of the WebKit AccessibilityObject tree.
RefPtr<GlueAccessibilityObject> acc_obj_root_;
};
/*static*/
WebAccessibilityManager* WebAccessibilityManager::Create() {
return new WebAccessibilityManagerImpl();
}
// class WebAccessibilityManagerImpl
WebAccessibilityManagerImpl::WebAccessibilityManagerImpl()
: root_(new GlueAccessibilityObjectRoot) {
}
bool WebAccessibilityManagerImpl::GetAccObjInfo(WebView* view,
const WebAccessibility::InParams& in_params,
WebAccessibility::OutParams* out_params) {
if (!root_->acc_obj_root_ && !InitAccObjRoot(view)) {
// Failure in retrieving or initializing the root.
return false;
}
// Find GlueAccessibilityObject requested by [in_params.object_id].
IntToAccObjMap::iterator it =
int_to_acc_obj_map_.find(in_params.object_id);
if (it == int_to_acc_obj_map_.end() || !it->second) {
// Map did not contain a valid instance of the data requested.
return false;
}
RefPtr<GlueAccessibilityObject> active_acc_obj = it->second;
// Function input parameters.
int child_id = in_params.child_id;
// Temp paramters for holding output information.
RefPtr<GlueAccessibilityObject> out_acc_obj = NULL;
WebCore::String out_string;
switch (in_params.function_id) {
case WebAccessibility::FUNCTION_DODEFAULTACTION :
if (!active_acc_obj->DoDefaultAction(child_id))
return false;
break;
case WebAccessibility::FUNCTION_HITTEST :
out_acc_obj = active_acc_obj->HitTest(in_params.input_long1,
in_params.input_long2);
if (!out_acc_obj.get())
return false;
break;
case WebAccessibility::FUNCTION_LOCATION :
if (!active_acc_obj->Location(&out_params->output_long1,
&out_params->output_long2,
&out_params->output_long3,
&out_params->output_long4,
child_id)) {
return false;
}
break;
case WebAccessibility::FUNCTION_NAVIGATE :
out_acc_obj = active_acc_obj->Navigate(
static_cast<WebAccessibility::Direction>(in_params.input_long1),
child_id);
if (!out_acc_obj.get())
return false;
break;
case WebAccessibility::FUNCTION_GETCHILD :
if (child_id == 0) {
// If child requested is self, stay with the same accessibility object.
out_params->object_id = in_params.object_id;
out_acc_obj = active_acc_obj.get();
} else {
out_acc_obj = active_acc_obj->GetChild(child_id);
}
if (!out_acc_obj.get())
return false;
break;
case WebAccessibility::FUNCTION_CHILDCOUNT :
if (!active_acc_obj->ChildCount(&out_params->output_long1))
return false;
break;
case WebAccessibility::FUNCTION_DEFAULTACTION :
if (!active_acc_obj->DefaultAction(child_id, &out_string))
return false;
break;
case WebAccessibility::FUNCTION_DESCRIPTION :
if (!active_acc_obj->Description(child_id, &out_string))
return false;
break;
case WebAccessibility::FUNCTION_GETFOCUSEDCHILD :
out_acc_obj = active_acc_obj->GetFocusedChild();
if (!out_acc_obj.get())
return false;
break;
case WebAccessibility::FUNCTION_HELPTEXT :
if (!active_acc_obj->HelpText(child_id, &out_string))
return false;
break;
case WebAccessibility::FUNCTION_KEYBOARDSHORTCUT :
if (!active_acc_obj->KeyboardShortcut(child_id, &out_string))
return false;
break;
case WebAccessibility::FUNCTION_NAME :
if (!active_acc_obj->Name(child_id, &out_string))
return false;
break;
case WebAccessibility::FUNCTION_GETPARENT :
out_acc_obj = active_acc_obj->GetParent();
if (!out_acc_obj.get())
return false;
break;
case WebAccessibility::FUNCTION_ROLE :
if (!active_acc_obj->Role(child_id, &out_params->output_long1))
return false;
break;
case WebAccessibility::FUNCTION_STATE :
if (!active_acc_obj->State(child_id, &out_params->output_long1))
return false;
break;
case WebAccessibility::FUNCTION_VALUE :
if (!active_acc_obj->Value(child_id, &out_string))
return false;
break;
default:
// Non-supported function id.
return false;
}
// Output and hashmap assignments, as appropriate.
if (!out_string.isEmpty())
out_params->output_string = StringToString16(out_string);
if (out_acc_obj) {
AccObjToIntMap::iterator it = acc_obj_to_int_map_.find(out_acc_obj.get());
if (it != acc_obj_to_int_map_.end()) {
// Data already present in map, return previously assigned id.
out_params->object_id = it->second;
out_params->output_long1 = -1;
} else {
// Insert new GlueAccessibilityObject in hashmaps.
int_to_acc_obj_map_[acc_obj_id_] = out_acc_obj.get();
acc_obj_to_int_map_[out_acc_obj.get()] = acc_obj_id_;
out_params->object_id = acc_obj_id_++;
out_params->output_long1 = -1;
}
}
// TODO(klink): Handle simple objects returned.
return true;
}
bool WebAccessibilityManagerImpl::InitAccObjRoot(WebView* view) {
// Root id is always 0.
acc_obj_id_ = 0;
// Enable accessibility and retrieve Document.
WebCore::AXObjectCache::enableAccessibility();
WebFrameImpl* main_frame_impl =
static_cast<WebFrameImpl*>(view->GetMainFrame());
if (!main_frame_impl || !main_frame_impl->frame())
return false;
WebCore::Document* doc = main_frame_impl->frame()->document();
if (!doc || !doc->renderer())
return false;
if (!root_->acc_obj_root_) {
// Either we've never had a wrapper for this frame's top-level Document,
// the Document renderer was destroyed and its wrapper was detached, or
// the previous Document is in the page cache, and the current document
// needs to be wrapped.
root_->acc_obj_root_ = GlueAccessibilityObject::CreateInstance(doc->
axObjectCache()->getOrCreate(doc->renderer()));
}
// Insert root in hashmaps.
int_to_acc_obj_map_[acc_obj_id_] = root_->acc_obj_root_.get();
acc_obj_to_int_map_[root_->acc_obj_root_.get()] = acc_obj_id_++;
return true;
}
bool WebAccessibilityManagerImpl::ClearAccObjMap(int acc_obj_id,
bool clear_all) {
if (clear_all) {
// Clear maps and invalidate root.
int_to_acc_obj_map_.clear();
acc_obj_to_int_map_.clear();
root_->acc_obj_root_ = 0;
return true;
}
IntToAccObjMap::iterator it = int_to_acc_obj_map_.find(acc_obj_id);
if (it == int_to_acc_obj_map_.end()) {
// Element not found.
return false;
}
if (it->second) {
// Erase element from reverse hashmap.
AccObjToIntMap::iterator it2 = acc_obj_to_int_map_.find(it->second);
if (it2 != acc_obj_to_int_map_.end())
acc_obj_to_int_map_.erase(it2);
}
int_to_acc_obj_map_.erase(it);
if (acc_obj_id == 0) {
// Invalidate root.
root_->acc_obj_root_ = 0;
}
return true;
}
} // namespace webkit_glue
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