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ax_system_caret_win.cc
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ax_system_caret_win.cc
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// Copyright 2017 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 "ui/accessibility/platform/ax_system_caret_win.h"
#include <windows.h>
#include "base/logging.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/accessibility/platform/ax_platform_node_win.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/rect_f.h"
namespace ui {
AXSystemCaretWin::AXSystemCaretWin(gfx::AcceleratedWidget event_target)
: event_target_(event_target) {
caret_ = static_cast<AXPlatformNodeWin*>(AXPlatformNodeWin::Create(this));
// The caret object is not part of the accessibility tree and so doesn't need
// a node ID. A globally unique ID is used when firing Win events, retrieved
// via |unique_id|.
data_.id = -1;
data_.role = ax::mojom::Role::kCaret;
// |get_accState| should return 0 which means that the caret is visible.
data_.state = 0;
// According to MSDN, "Edit" should be the name of the caret object.
data_.SetName(L"Edit");
data_.offset_container_id = -1;
if (event_target_) {
::NotifyWinEvent(EVENT_OBJECT_CREATE, event_target_, OBJID_CARET,
-caret_->GetUniqueId());
}
}
AXSystemCaretWin::~AXSystemCaretWin() {
if (event_target_) {
::NotifyWinEvent(EVENT_OBJECT_DESTROY, event_target_, OBJID_CARET,
-caret_->GetUniqueId());
}
caret_->Destroy();
}
Microsoft::WRL::ComPtr<IAccessible> AXSystemCaretWin::GetCaret() const {
Microsoft::WRL::ComPtr<IAccessible> caret_accessible;
HRESULT hr = caret_->QueryInterface(
IID_IAccessible,
reinterpret_cast<void**>(caret_accessible.GetAddressOf()));
DCHECK(SUCCEEDED(hr));
return caret_accessible;
}
void AXSystemCaretWin::MoveCaretTo(const gfx::Rect& bounds) {
if (bounds.IsEmpty())
return;
data_.location = gfx::RectF(bounds);
if (event_target_) {
::NotifyWinEvent(EVENT_OBJECT_LOCATIONCHANGE, event_target_, OBJID_CARET,
-caret_->GetUniqueId());
}
}
const AXNodeData& AXSystemCaretWin::GetData() const {
return data_;
}
const AXTreeData& AXSystemCaretWin::GetTreeData() const {
CR_DEFINE_STATIC_LOCAL(AXTreeData, empty_data, ());
return empty_data;
}
gfx::NativeWindow AXSystemCaretWin::GetTopLevelWidget() {
return nullptr;
}
gfx::NativeViewAccessible AXSystemCaretWin::GetParent() {
if (!event_target_)
return nullptr;
gfx::NativeViewAccessible parent;
HRESULT hr =
::AccessibleObjectFromWindow(event_target_, OBJID_WINDOW, IID_IAccessible,
reinterpret_cast<void**>(&parent));
if (SUCCEEDED(hr))
return parent;
return nullptr;
}
int AXSystemCaretWin::GetChildCount() {
return 0;
}
gfx::NativeViewAccessible AXSystemCaretWin::ChildAtIndex(int index) {
return nullptr;
}
gfx::Rect AXSystemCaretWin::GetClippedScreenBoundsRect() const {
// We could optionally add clipping here if ever needed.
return ToEnclosingRect(data_.location);
}
gfx::Rect AXSystemCaretWin::GetUnclippedScreenBoundsRect() const {
return ToEnclosingRect(data_.location);
}
gfx::NativeViewAccessible AXSystemCaretWin::HitTestSync(int x, int y) {
return nullptr;
}
gfx::NativeViewAccessible AXSystemCaretWin::GetFocus() {
return nullptr;
}
gfx::AcceleratedWidget
AXSystemCaretWin::GetTargetForNativeAccessibilityEvent() {
return event_target_;
}
int AXSystemCaretWin::GetTableRowCount() const {
return 0;
}
int AXSystemCaretWin::GetTableColCount() const {
return 0;
}
std::vector<int32_t> AXSystemCaretWin::GetColHeaderNodeIds(
int32_t col_index) const {
return std::vector<int32_t>();
}
std::vector<int32_t> AXSystemCaretWin::GetRowHeaderNodeIds(
int32_t row_index) const {
return std::vector<int32_t>();
}
int32_t AXSystemCaretWin::GetCellId(int32_t row_index,
int32_t col_index) const {
return 0;
}
int32_t AXSystemCaretWin::CellIdToIndex(int32_t cell_id) const {
return -1;
}
int32_t AXSystemCaretWin::CellIndexToId(int32_t cell_index) const {
return 0;
}
bool AXSystemCaretWin::AccessibilityPerformAction(const AXActionData& data) {
return false;
}
int AXSystemCaretWin::GetIndexInParent() const {
return -1;
}
AXPlatformNode* AXSystemCaretWin::GetFromNodeID(int32_t id) {
return nullptr;
}
bool AXSystemCaretWin::ShouldIgnoreHoveredStateForTesting() {
return false;
}
bool AXSystemCaretWin::IsOffscreen() const {
return false;
}
std::set<int32_t> AXSystemCaretWin::GetReverseRelations(
ax::mojom::IntAttribute attr,
int32_t dst_id) {
return std::set<int32_t>();
}
std::set<int32_t> AXSystemCaretWin::GetReverseRelations(
ax::mojom::IntListAttribute attr,
int32_t dst_id) {
return std::set<int32_t>();
}
const ui::AXUniqueId& AXSystemCaretWin::GetUniqueId() const {
return unique_id_;
}
} // namespace ui