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// Copyright 2015 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/ash/accessibility/chromevox_panel.h"
#include <memory>
#include "ash/accessibility/accessibility_controller.h"
#include "ash/public/cpp/accessibility_controller_enums.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ash/accessibility/accessibility_manager.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/common/constants.h"
#include "ui/accessibility/accessibility_features.h"
#include "ui/views/view_class_properties.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace {
const char kChromeVoxMV2PanelRelativeUrl[] = "/chromevox/mv2/panel/panel.html";
const char kChromeVoxPanelRelativeUrl[] = "/chromevox/mv3/panel/panel.html";
const char kDisableSpokenFeedbackURLFragment[] = "close";
const char kFocusURLFragment[] = "focus";
const char kFullscreenURLFragment[] = "fullscreen";
const char kWidgetName[] = "ChromeVoxPanel";
const int kPanelHeight = 44;
} // namespace
DEFINE_ELEMENT_IDENTIFIER_VALUE(kChromeVoxPanelElementId);
class ChromeVoxPanel::ChromeVoxPanelWebContentsObserver
: public content::WebContentsObserver {
public:
ChromeVoxPanelWebContentsObserver(content::WebContents* web_contents,
ChromeVoxPanel* panel)
: content::WebContentsObserver(web_contents), panel_(panel) {}
ChromeVoxPanelWebContentsObserver(const ChromeVoxPanelWebContentsObserver&) =
delete;
ChromeVoxPanelWebContentsObserver& operator=(
const ChromeVoxPanelWebContentsObserver&) = delete;
~ChromeVoxPanelWebContentsObserver() override = default;
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override {
// The ChromeVox panel uses the URL fragment to communicate state
// to this panel host.
std::string fragment = web_contents()->GetLastCommittedURL().ref();
if (fragment == kDisableSpokenFeedbackURLFragment)
AccessibilityManager::Get()->EnableSpokenFeedback(false);
else if (fragment == kFullscreenURLFragment)
panel_->EnterFullscreen();
else if (fragment == kFocusURLFragment)
panel_->Focus();
else
panel_->ExitFullscreen();
}
private:
raw_ptr<ChromeVoxPanel> panel_;
};
ChromeVoxPanel::ChromeVoxPanel(content::BrowserContext* browser_context)
: AccessibilityPanel(browser_context, GetUrlForContent(), kWidgetName) {
web_contents_observer_ = std::make_unique<ChromeVoxPanelWebContentsObserver>(
GetWebContents(), this);
GetContentsView()->SetProperty(views::kElementIdentifierKey,
kChromeVoxPanelElementId);
SetAccessibilityPanelFullscreen(false);
}
ChromeVoxPanel::~ChromeVoxPanel() = default;
void ChromeVoxPanel::EnterFullscreen() {
Focus();
SetAccessibilityPanelFullscreen(true);
}
void ChromeVoxPanel::ExitFullscreen() {
GetWidget()->Deactivate();
GetWidget()->widget_delegate()->SetCanActivate(false);
SetAccessibilityPanelFullscreen(false);
}
void ChromeVoxPanel::Focus() {
GetWidget()->widget_delegate()->SetCanActivate(true);
GetWidget()->Activate();
GetContentsView()->RequestFocus();
}
void ChromeVoxPanel::SetAccessibilityPanelFullscreen(bool fullscreen) {
gfx::Rect bounds(0, 0, 0, kPanelHeight);
auto state = fullscreen ? AccessibilityPanelState::FULLSCREEN
: AccessibilityPanelState::FULL_WIDTH;
AccessibilityController::Get()->SetAccessibilityPanelBounds(bounds, state);
}
std::string ChromeVoxPanel::GetUrlForContent() {
std::string url(EXTENSION_PREFIX);
url += extension_misc::kChromeVoxExtensionId;
if (::features::IsAccessibilityManifestV3EnabledForChromeVox()) {
url += kChromeVoxPanelRelativeUrl;
} else {
url += kChromeVoxMV2PanelRelativeUrl;
}
return url;
}
} // namespace ash
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