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// Copyright (c) 2019 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.
// Define all the base::Features used by ui/accessibility.
#ifndef UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
#define UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
#include "base/feature_list.h"
#include "build/build_config.h"
#include "ui/accessibility/ax_base_export.h"
namespace features {
AX_BASE_EXPORT extern const base::Feature kEnableAccessibilityExposeDisplayNone;
// Returns true if "display: none" nodes should be exposed to the
// browser process AXTree.
AX_BASE_EXPORT bool IsAccessibilityExposeDisplayNoneEnabled();
AX_BASE_EXPORT extern const base::Feature kEnableAccessibilityExposeHTMLElement;
// Returns true if the <html> element should be exposed to the
// browser process AXTree (as an ignored node).
AX_BASE_EXPORT bool IsAccessibilityExposeHTMLElementEnabled();
AX_BASE_EXPORT extern const base::Feature
kEnableAccessibilityExposeIgnoredNodes;
// Returns true if all ignored nodes are exposed by Blink in the
// accessibility tree.
AX_BASE_EXPORT bool IsAccessibilityExposeIgnoredNodesEnabled();
AX_BASE_EXPORT extern const base::Feature kEnableAccessibilityLanguageDetection;
// Return true if language detection should be used to determine the language
// of text content in page and exposed to the browser process AXTree.
AX_BASE_EXPORT bool IsAccessibilityLanguageDetectionEnabled();
// Serializes accessibility information from the Views tree and deserializes it
// into an AXTree in the browser process.
AX_BASE_EXPORT extern const base::Feature kEnableAccessibilityTreeForViews;
// Returns true if the Views tree is exposed using an AXTree in the browser
// process. Returns false if the Views tree is exposed to accessibility
// directly.
AX_BASE_EXPORT bool IsAccessibilityTreeForViewsEnabled();
AX_BASE_EXPORT extern const base::Feature kAccessibilityFocusHighlight;
// Returns true if the accessibility focus highlight feature is enabled,
// which draws a visual highlight around the focused element on the page
// briefly whenever focus changes.
AX_BASE_EXPORT bool IsAccessibilityFocusHighlightEnabled();
#if defined(OS_WIN)
// Enables an experimental Chrome-specific accessibility COM API
AX_BASE_EXPORT extern const base::Feature kIChromeAccessible;
// Returns true if the IChromeAccessible COM API is enabled.
AX_BASE_EXPORT bool IsIChromeAccessibleEnabled();
#endif // defined(OS_WIN)
#if defined(OS_CHROMEOS)
AX_BASE_EXPORT extern const base::Feature kAccessibilityCursorColor;
// Returns true if the accessibility cursor color feature is enabled, letting
// users pick a custom cursor color.
AX_BASE_EXPORT bool IsAccessibilityCursorColorEnabled();
// Enables new magnifier focus following feature, which provides a richer
// focus following experience.
AX_BASE_EXPORT extern const base::Feature kMagnifierNewFocusFollowing;
// Returns true if the new magnifier focus following feature is enabled.
AX_BASE_EXPORT bool IsMagnifierNewFocusFollowingEnabled();
#endif // defined(OS_CHROMEOS)
// Enables Get Image Descriptions to augment existing images labels,
// rather than only provide descriptions for completely unlabeled images.
AX_BASE_EXPORT extern const base::Feature kAugmentExistingImageLabels;
// Returns true if augmenting existing image labels is enabled.
AX_BASE_EXPORT bool IsAugmentExistingImageLabelsEnabled();
// Once this flag is enabled, a single codebase in AXPosition will be used for
// handling document markers on all platforms, including the announcement of
// spelling mistakes.
AX_BASE_EXPORT extern const base::Feature kUseAXPositionForDocumentMarkers;
// Returns true if document markers are exposed on inline text boxes in the
// accessibility tree in addition to on static text nodes. This in turn enables
// AXPosition on the browser to discover and work with document markers, instead
// of the legacy code that collects document markers manually from static text
// nodes and which is different for each platform.
AX_BASE_EXPORT bool IsUseAXPositionForDocumentMarkersEnabled();
#if defined(OS_CHROMEOS)
// Enables enhanced Select-to-speak features that allow users broader control
// of TTS (pause, resume, skip between sentences and paragraphs).
AX_BASE_EXPORT extern const base::Feature kSelectToSpeakNavigationControl;
// Returns true if enhanced Select-to-speak features are enabled.
AX_BASE_EXPORT bool IsSelectToSpeakNavigationControlEnabled();
#endif // defined(OS_CHROMEOS)
} // namespace features
#endif // UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
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