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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 "chrome/browser/ui/webui/settings/accessibility_main_handler.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/renderer_context_menu/accessibility_labels_bubble_model.h"
#include "chrome/browser/ui/confirm_bubble.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "ui/accessibility/accessibility_features.h"
#include "ui/accessibility/platform/ax_platform.h"
namespace settings {
AccessibilityMainHandler::AccessibilityMainHandler() = default;
AccessibilityMainHandler::~AccessibilityMainHandler() = default;
void AccessibilityMainHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
"getScreenReaderState",
base::BindRepeating(&AccessibilityMainHandler::HandleGetScreenReaderState,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"confirmA11yImageLabels",
base::BindRepeating(
&AccessibilityMainHandler::HandleCheckAccessibilityImageLabels,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"getScreenAiInstallState",
base::BindRepeating(
&AccessibilityMainHandler::HandleGetScreenAIInstallState,
base::Unretained(this)));
}
void AccessibilityMainHandler::OnJavascriptAllowed() {
#if BUILDFLAG(IS_CHROMEOS)
accessibility_subscription_ =
ash::AccessibilityManager::Get()->RegisterCallback(base::BindRepeating(
&AccessibilityMainHandler::OnAccessibilityStatusChanged,
base::Unretained(this)));
#endif // BUILDFLAG(IS_CHROMEOS)
if (features::IsMainNodeAnnotationsEnabled()) {
CHECK(!component_ready_observer_.IsObserving());
component_ready_observer_.Observe(
screen_ai::ScreenAIInstallState::GetInstance());
}
}
void AccessibilityMainHandler::OnJavascriptDisallowed() {
#if BUILDFLAG(IS_CHROMEOS)
accessibility_subscription_ = {};
#endif // BUILDFLAG(IS_CHROMEOS)
if (features::IsMainNodeAnnotationsEnabled()) {
component_ready_observer_.Reset();
}
}
void AccessibilityMainHandler::DownloadProgressChanged(double progress) {
CHECK_GE(progress, 0.0);
CHECK_LE(progress, 1.0);
const int progress_num = progress * 100;
FireWebUIListener("screen-ai-downloading-progress-changed",
base::Value(progress_num));
}
void AccessibilityMainHandler::StateChanged(
screen_ai::ScreenAIInstallState::State state) {
base::Value state_value = base::Value(static_cast<int>(state));
FireWebUIListener("screen-ai-state-changed", state_value);
}
void AccessibilityMainHandler::HandleGetScreenAIInstallState(
const base::Value::List& args) {
CHECK_EQ(1U, args.size());
const base::Value& callback_id = args[0];
AllowJavascript();
// Get the current install state and send it back to a UI callback.
screen_ai::ScreenAIInstallState::State current_install_state =
screen_ai::ScreenAIInstallState::GetInstance()->get_state();
ResolveJavascriptCallback(
callback_id, base::Value(static_cast<int>(current_install_state)));
}
void AccessibilityMainHandler::HandleGetScreenReaderState(
const base::Value::List& args) {
CHECK_EQ(1U, args.size());
const base::Value& callback_id = args[0];
AllowJavascript();
// Get the current install state and send it back to a UI callback.
base::Value is_screen_reader_active(
ui::AXPlatform::GetInstance().IsScreenReaderActive());
ResolveJavascriptCallback(callback_id, is_screen_reader_active);
}
void AccessibilityMainHandler::HandleCheckAccessibilityImageLabels(
const base::Value::List& args) {
// When the user tries to enable the feature, show the modal dialog. The
// dialog will disable the feature again if it is not accepted.
content::WebContents* web_contents = web_ui()->GetWebContents();
content::RenderWidgetHostView* view = web_contents->GetPrimaryMainFrame()
->GetRenderViewHost()
->GetWidget()
->GetView();
gfx::Rect rect = view->GetViewBounds();
auto model = std::make_unique<AccessibilityLabelsBubbleModel>(
Profile::FromWebUI(web_ui()), web_contents, true /* enable always */);
chrome::ShowConfirmBubble(
web_contents->GetTopLevelNativeWindow(), view->GetNativeView(),
gfx::Point(rect.CenterPoint().x(), rect.y()), std::move(model));
}
void AccessibilityMainHandler::SendScreenReaderStateChanged() {
base::Value result(ui::AXPlatform::GetInstance().IsScreenReaderActive());
FireWebUIListener("screen-reader-state-changed", result);
}
#if BUILDFLAG(IS_CHROMEOS)
void AccessibilityMainHandler::OnAccessibilityStatusChanged(
const ash::AccessibilityStatusEventDetails& details) {
// TODO(accessibility): Listen to assistive tech changes across all platforms
// using AXModeObserver::OnAssistiveTechChanged().
if (details.notification_type ==
ash::AccessibilityNotificationType::kToggleSpokenFeedback) {
SendScreenReaderStateChanged();
}
}
#endif // BUILDFLAG(IS_CHROMEOS)
} // namespace settings
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