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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/accessibility/platform/ax_platform_node_textchildprovider_win.h"
#include <UIAutomationClient.h>
#include <UIAutomationCoreApi.h>
#include "ui/accessibility/platform/ax_platform_node_textprovider_win.h"
#include "ui/base/win/atl_module.h"
#define UIA_VALIDATE_TEXTCHILDPROVIDER_CALL() \
if (owner()->IsDestroyed()) \
return UIA_E_ELEMENTNOTAVAILABLE;
namespace ui {
namespace {
AXPlatformNodeWin* GetParentAXPlatformNodeWin(AXPlatformNodeWin* node) {
gfx::NativeViewAccessible native_parent = node->GetParent();
DCHECK(native_parent != node->GetNativeViewAccessible());
return static_cast<AXPlatformNodeWin*>(
AXPlatformNode::FromNativeViewAccessible(native_parent));
}
} // namespace
AXPlatformNodeTextChildProviderWin::AXPlatformNodeTextChildProviderWin() {}
AXPlatformNodeTextChildProviderWin::~AXPlatformNodeTextChildProviderWin() {}
// static
Microsoft::WRL::ComPtr<AXPlatformNodeTextChildProviderWin>
AXPlatformNodeTextChildProviderWin::Create(AXPlatformNodeWin* owner) {
CComObject<AXPlatformNodeTextChildProviderWin>* text_child_provider = nullptr;
if (SUCCEEDED(CComObject<AXPlatformNodeTextChildProviderWin>::CreateInstance(
&text_child_provider))) {
DCHECK(text_child_provider);
text_child_provider->owner_ = owner;
return text_child_provider;
}
return nullptr;
}
// static
void AXPlatformNodeTextChildProviderWin::CreateIUnknown(
AXPlatformNodeWin* owner,
IUnknown** unknown) {
Microsoft::WRL::ComPtr<AXPlatformNodeTextChildProviderWin>
text_child_provider(Create(owner));
if (text_child_provider)
*unknown = text_child_provider.Detach();
}
HRESULT AXPlatformNodeTextChildProviderWin::get_TextContainer(
IRawElementProviderSimple** result) {
WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_TEXTCHILD_GET_TEXTCONTAINER);
UIA_VALIDATE_TEXTCHILDPROVIDER_CALL();
*result = nullptr;
AXPlatformNodeWin* container = GetTextContainer(owner_.Get());
if (container)
container->QueryInterface(IID_PPV_ARGS(result));
return S_OK;
}
HRESULT AXPlatformNodeTextChildProviderWin::get_TextRange(
ITextRangeProvider** result) {
WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_TEXTCHILD_GET_TEXTRANGE);
UIA_VALIDATE_TEXTCHILDPROVIDER_CALL();
*result = nullptr;
AXPlatformNodeWin* container = GetTextContainer(owner_.Get());
if (container && container->IsDescendant(owner())) {
AXPlatformNodeTextProviderWin::GetRangeFromChild(container, owner(),
result);
}
return S_OK;
}
AXPlatformNodeWin* AXPlatformNodeTextChildProviderWin::GetTextContainer(
AXPlatformNodeWin* descendant) {
for (AXPlatformNodeWin* parent = GetParentAXPlatformNodeWin(descendant);
parent; parent = GetParentAXPlatformNodeWin(parent)) {
if (parent->IsPatternProviderSupported(UIA_TextPatternId)) {
return parent;
}
}
return nullptr;
}
AXPlatformNodeWin* AXPlatformNodeTextChildProviderWin::owner() const {
return owner_.Get();
}
} // namespace ui
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