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content / renderer / accessibility / render_accessibility_manager.cc [blame]
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/accessibility/render_accessibility_manager.h"
#include <utility>
#include "base/debug/alias.h"
#include "base/functional/bind.h"
#include "content/renderer/accessibility/render_accessibility_impl.h"
#include "content/renderer/render_frame_impl.h"
#include "third_party/blink/public/common/features.h"
namespace content {
RenderAccessibilityManager::RenderAccessibilityManager(
RenderFrameImpl* render_frame)
: render_frame_(render_frame) {}
RenderAccessibilityManager::~RenderAccessibilityManager() = default;
void RenderAccessibilityManager::BindReceiver(
mojo::PendingAssociatedReceiver<blink::mojom::RenderAccessibility>
receiver) {
// TODO(crbug.com/40842669): re-add DCHECK(!receiver_.is_bound()),
// once underlying issue is resolved.
if (receiver_.is_bound())
receiver_.reset();
receiver_.Bind(std::move(receiver));
receiver_.set_disconnect_handler(base::BindOnce(
[](RenderAccessibilityManager* impl) {
impl->receiver_.reset();
impl->SetMode(ui::AXMode::kNone, 0);
},
base::Unretained(this)));
}
RenderAccessibilityImpl*
RenderAccessibilityManager::GetRenderAccessibilityImpl() {
return render_accessibility_.get();
}
ui::AXMode RenderAccessibilityManager::GetAccessibilityMode() const {
if (!render_accessibility_)
return ui::AXMode();
return render_accessibility_->GetAccessibilityMode();
}
void RenderAccessibilityManager::SetMode(const ui::AXMode& new_mode,
uint32_t reset_token) {
ui::AXMode old_mode = GetAccessibilityMode();
if (old_mode == new_mode) {
if (render_accessibility_) {
render_accessibility_->set_reset_token(reset_token);
}
return;
}
if (new_mode.has_mode(ui::AXMode::kWebContents) &&
!old_mode.has_mode(ui::AXMode::kWebContents)) {
render_accessibility_ =
std::make_unique<RenderAccessibilityImpl>(this, render_frame_);
} else if (!new_mode.has_mode(ui::AXMode::kWebContents) &&
old_mode.has_mode(ui::AXMode::kWebContents)) {
render_accessibility_.reset();
}
if (render_accessibility_) {
CHECK(reset_token);
render_accessibility_->set_reset_token(reset_token);
render_accessibility_->NotifyAccessibilityModeChange(new_mode);
}
// Notify the RenderFrame when the accessibility mode is changes to ensure it
// notifies the relevant observers (subclasses of RenderFrameObserver). This
// does not include the RenderAccessibilityImpl instance owned by |this| which
// already received the mode change above. It must go first because it sets up
// or tears down Blink accessibility ensuring subsequent observers can reason
// accurately about accessibility.
render_frame_->NotifyAccessibilityModeChange(new_mode);
}
void RenderAccessibilityManager::FatalError() {
NO_CODE_FOLDING();
CHECK(false) << "Invalid accessibility tree.";
}
void RenderAccessibilityManager::HitTest(
const gfx::Point& point,
ax::mojom::Event event_to_fire,
int request_id,
blink::mojom::RenderAccessibility::HitTestCallback callback) {
DCHECK(render_accessibility_);
render_accessibility_->HitTest(point, event_to_fire, request_id,
std::move(callback));
}
void RenderAccessibilityManager::PerformAction(const ui::AXActionData& data) {
DCHECK(render_accessibility_);
render_accessibility_->PerformAction(data);
}
void RenderAccessibilityManager::Reset(uint32_t reset_token) {
DCHECK(render_accessibility_);
render_accessibility_->Reset(reset_token);
}
void RenderAccessibilityManager::HandleAXEvents(
ui::AXUpdatesAndEvents& updates_and_events,
ui::AXLocationAndScrollUpdates& location_and_scroll_updates,
uint32_t reset_token,
blink::mojom::RenderAccessibilityHost::HandleAXEventsCallback callback) {
CHECK(reset_token);
GetOrCreateRemoteRenderAccessibilityHost()->HandleAXEvents(
updates_and_events, location_and_scroll_updates, reset_token,
std::move(callback));
}
mojo::Remote<blink::mojom::RenderAccessibilityHost>&
RenderAccessibilityManager::GetOrCreateRemoteRenderAccessibilityHost() {
if (!render_accessibility_host_) {
render_frame_->GetBrowserInterfaceBroker().GetInterface(
render_accessibility_host_.BindNewPipeAndPassReceiver());
}
return render_accessibility_host_;
}
void RenderAccessibilityManager::CloseConnection() {
if (render_accessibility_host_) {
render_accessibility_host_.reset();
if (render_accessibility_) {
render_accessibility_->ConnectionClosed();
}
}
}
} // namespace content