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chromium / chromium / src / aace0cfef2d51e7f038b07d5df26d126e4160f70 / . / content / browser / accessibility / web_contents_accessibility_android.cc
blob: 79686d68837fb1b1bb78652eb18cf3687084a260 [file] [log] [blame]
// 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 "content/browser/accessibility/web_contents_accessibility_android.h"
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/debug/crash_logging.h"
#include "base/feature_list.h"
#include "base/macros.h"
#include "base/metrics/histogram_macros.h"
#include "base/numerics/ranges.h"
#include "content/browser/accessibility/browser_accessibility_android.h"
#include "content/browser/accessibility/browser_accessibility_manager_android.h"
#include "content/browser/accessibility/browser_accessibility_state_impl.h"
#include "content/browser/accessibility/one_shot_accessibility_tree_search.h"
#include "content/browser/android/render_widget_host_connector.h"
#include "content/browser/renderer_host/render_widget_host_view_android.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/android/content_jni_headers/WebContentsAccessibilityImpl_jni.h"
#include "content/public/common/content_features.h"
#include "content/public/common/use_zoom_for_dsf_policy.h"
#include "ui/accessibility/ax_assistant_structure.h"
#include "ui/events/android/motion_event_android.h"
using base::android::AttachCurrentThread;
using base::android::JavaParamRef;
using base::android::ScopedJavaLocalRef;
namespace content {
namespace {
// IMPORTANT!
// These values are written to logs. Do not renumber or delete
// existing items; add new entries to the end of the list.
//
// Note: The string names for these enums must correspond with the names of
// constants from AccessibilityEvent and AccessibilityServiceInfo, defined
// below. For example, UMA_EVENT_ANNOUNCEMENT corresponds to
// ACCESSIBILITYEVENT_TYPE_ANNOUNCEMENT via the macro
// EVENT_TYPE_HISTOGRAM(event_type_mask, ANNOUNCEMENT).
enum {
UMA_CAPABILITY_CAN_CONTROL_MAGNIFICATION = 0,
UMA_CAPABILITY_CAN_PERFORM_GESTURES = 1,
UMA_CAPABILITY_CAN_REQUEST_ENHANCED_WEB_ACCESSIBILITY = 2,
UMA_CAPABILITY_CAN_REQUEST_FILTER_KEY_EVENTS = 3,
UMA_CAPABILITY_CAN_REQUEST_TOUCH_EXPLORATION = 4,
UMA_CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT = 5,
UMA_EVENT_ANNOUNCEMENT = 6,
UMA_EVENT_ASSIST_READING_CONTEXT = 7,
UMA_EVENT_GESTURE_DETECTION_END = 8,
UMA_EVENT_GESTURE_DETECTION_START = 9,
UMA_EVENT_NOTIFICATION_STATE_CHANGED = 10,
UMA_EVENT_TOUCH_EXPLORATION_GESTURE_END = 11,
UMA_EVENT_TOUCH_EXPLORATION_GESTURE_START = 12,
UMA_EVENT_TOUCH_INTERACTION_END = 13,
UMA_EVENT_TOUCH_INTERACTION_START = 14,
UMA_EVENT_VIEW_ACCESSIBILITY_FOCUSED = 15,
UMA_EVENT_VIEW_ACCESSIBILITY_FOCUS_CLEARED = 16,
UMA_EVENT_VIEW_CLICKED = 17,
UMA_EVENT_VIEW_CONTEXT_CLICKED = 18,
UMA_EVENT_VIEW_FOCUSED = 19,
UMA_EVENT_VIEW_HOVER_ENTER = 20,
UMA_EVENT_VIEW_HOVER_EXIT = 21,
UMA_EVENT_VIEW_LONG_CLICKED = 22,
UMA_EVENT_VIEW_SCROLLED = 23,
UMA_EVENT_VIEW_SELECTED = 24,
UMA_EVENT_VIEW_TEXT_CHANGED = 25,
UMA_EVENT_VIEW_TEXT_SELECTION_CHANGED = 26,
UMA_EVENT_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY = 27,
UMA_EVENT_WINDOWS_CHANGED = 28,
UMA_EVENT_WINDOW_CONTENT_CHANGED = 29,
UMA_EVENT_WINDOW_STATE_CHANGED = 30,
UMA_FEEDBACK_AUDIBLE = 31,
UMA_FEEDBACK_BRAILLE = 32,
UMA_FEEDBACK_GENERIC = 33,
UMA_FEEDBACK_HAPTIC = 34,
UMA_FEEDBACK_SPOKEN = 35,
UMA_FEEDBACK_VISUAL = 36,
UMA_FLAG_FORCE_DIRECT_BOOT_AWARE = 37,
UMA_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS = 38,
UMA_FLAG_REPORT_VIEW_IDS = 39,
UMA_FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY = 40,
UMA_FLAG_REQUEST_FILTER_KEY_EVENTS = 41,
UMA_FLAG_REQUEST_TOUCH_EXPLORATION_MODE = 42,
UMA_FLAG_RETRIEVE_INTERACTIVE_WINDOWS = 43,
// This must always be the last enum. It's okay for its value to
// increase, but none of the other enum values may change.
UMA_ACCESSIBILITYSERVICEINFO_MAX
};
// These are constants from
// android.view.accessibility.AccessibilityEvent in Java.
//
// If you add a new constant, add a new UMA enum above and add a line
// to CollectStats(), below.
enum {
ACCESSIBILITYEVENT_TYPE_VIEW_CLICKED = 0x00000001,
ACCESSIBILITYEVENT_TYPE_VIEW_LONG_CLICKED = 0x00000002,
ACCESSIBILITYEVENT_TYPE_VIEW_SELECTED = 0x00000004,
ACCESSIBILITYEVENT_TYPE_VIEW_FOCUSED = 0x00000008,
ACCESSIBILITYEVENT_TYPE_VIEW_TEXT_CHANGED = 0x00000010,
ACCESSIBILITYEVENT_TYPE_WINDOW_STATE_CHANGED = 0x00000020,
ACCESSIBILITYEVENT_TYPE_NOTIFICATION_STATE_CHANGED = 0x00000040,
ACCESSIBILITYEVENT_TYPE_VIEW_HOVER_ENTER = 0x00000080,
ACCESSIBILITYEVENT_TYPE_VIEW_HOVER_EXIT = 0x00000100,
ACCESSIBILITYEVENT_TYPE_TOUCH_EXPLORATION_GESTURE_START = 0x00000200,
ACCESSIBILITYEVENT_TYPE_TOUCH_EXPLORATION_GESTURE_END = 0x00000400,
ACCESSIBILITYEVENT_TYPE_WINDOW_CONTENT_CHANGED = 0x00000800,
ACCESSIBILITYEVENT_TYPE_VIEW_SCROLLED = 0x00001000,
ACCESSIBILITYEVENT_TYPE_VIEW_TEXT_SELECTION_CHANGED = 0x00002000,
ACCESSIBILITYEVENT_TYPE_ANNOUNCEMENT = 0x00004000,
ACCESSIBILITYEVENT_TYPE_VIEW_ACCESSIBILITY_FOCUSED = 0x00008000,
ACCESSIBILITYEVENT_TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED = 0x00010000,
ACCESSIBILITYEVENT_TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY =
0x00020000,
ACCESSIBILITYEVENT_TYPE_GESTURE_DETECTION_START = 0x00040000,
ACCESSIBILITYEVENT_TYPE_GESTURE_DETECTION_END = 0x00080000,
ACCESSIBILITYEVENT_TYPE_TOUCH_INTERACTION_START = 0x00100000,
ACCESSIBILITYEVENT_TYPE_TOUCH_INTERACTION_END = 0x00200000,
ACCESSIBILITYEVENT_TYPE_WINDOWS_CHANGED = 0x00400000,
ACCESSIBILITYEVENT_TYPE_VIEW_CONTEXT_CLICKED = 0x00800000,
ACCESSIBILITYEVENT_TYPE_ASSIST_READING_CONTEXT = 0x01000000,
};
// These are constants from
// android.accessibilityservice.AccessibilityServiceInfo in Java:
//
// If you add a new constant, add a new UMA enum above and add a line
// to CollectStats(), below.
enum {
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT = 0x00000001,
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_REQUEST_TOUCH_EXPLORATION =
0x00000002,
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_REQUEST_ENHANCED_WEB_ACCESSIBILITY =
0x00000004,
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_REQUEST_FILTER_KEY_EVENTS =
0x00000008,
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_CONTROL_MAGNIFICATION = 0x00000010,
ACCESSIBILITYSERVICEINFO_CAPABILITY_CAN_PERFORM_GESTURES = 0x00000020,
ACCESSIBILITYSERVICEINFO_FEEDBACK_SPOKEN = 0x0000001,
ACCESSIBILITYSERVICEINFO_FEEDBACK_HAPTIC = 0x0000002,
ACCESSIBILITYSERVICEINFO_FEEDBACK_AUDIBLE = 0x0000004,
ACCESSIBILITYSERVICEINFO_FEEDBACK_VISUAL = 0x0000008,
ACCESSIBILITYSERVICEINFO_FEEDBACK_GENERIC = 0x0000010,
ACCESSIBILITYSERVICEINFO_FEEDBACK_BRAILLE = 0x0000020,
ACCESSIBILITYSERVICEINFO_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS = 0x0000002,
ACCESSIBILITYSERVICEINFO_FLAG_REQUEST_TOUCH_EXPLORATION_MODE = 0x0000004,
ACCESSIBILITYSERVICEINFO_FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY = 0x00000008,
ACCESSIBILITYSERVICEINFO_FLAG_REPORT_VIEW_IDS = 0x00000010,
ACCESSIBILITYSERVICEINFO_FLAG_REQUEST_FILTER_KEY_EVENTS = 0x00000020,
ACCESSIBILITYSERVICEINFO_FLAG_RETRIEVE_INTERACTIVE_WINDOWS = 0x00000040,
ACCESSIBILITYSERVICEINFO_FLAG_FORCE_DIRECT_BOOT_AWARE = 0x00010000,
};
// These macros simplify recording a histogram based on information we get
// from an AccessibilityService. There are four bitmasks of information
// we get from each AccessibilityService, and for each possible bit mask
// corresponding to one flag, we want to check if that flag is set, and if
// so, record the corresponding histogram.
//
// Doing this with macros reduces the chance for human error by
// recording the wrong histogram for the wrong flag.
//
// These macros are used by CollectStats(), below.
#define EVENT_TYPE_HISTOGRAM(event_type_mask, event_type) \
if (event_type_mask & ACCESSIBILITYEVENT_TYPE_##event_type) \
UMA_HISTOGRAM_ENUMERATION("Accessibility.AndroidServiceInfo", \
UMA_EVENT_##event_type, \
UMA_ACCESSIBILITYSERVICEINFO_MAX)
#define FLAGS_HISTOGRAM(flags_mask, flag) \
if (flags_mask & ACCESSIBILITYSERVICEINFO_FLAG_##flag) \
UMA_HISTOGRAM_ENUMERATION("Accessibility.AndroidServiceInfo", \
UMA_FLAG_##flag, UMA_ACCESSIBILITYSERVICEINFO_MAX)
#define FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, feedback_type) \
if (feedback_type_mask & ACCESSIBILITYSERVICEINFO_FEEDBACK_##feedback_type) \
UMA_HISTOGRAM_ENUMERATION("Accessibility.AndroidServiceInfo", \
UMA_FEEDBACK_##feedback_type, \
UMA_ACCESSIBILITYSERVICEINFO_MAX)
#define CAPABILITY_TYPE_HISTOGRAM(capability_type_mask, capability_type) \
if (capability_type_mask & \
ACCESSIBILITYSERVICEINFO_CAPABILITY_##capability_type) \
UMA_HISTOGRAM_ENUMERATION("Accessibility.AndroidServiceInfo", \
UMA_CAPABILITY_##capability_type, \
UMA_ACCESSIBILITYSERVICEINFO_MAX)
using SearchKeyToPredicateMap =
std::unordered_map<std::u16string, AccessibilityMatchPredicate>;
base::LazyInstance<SearchKeyToPredicateMap>::Leaky
g_search_key_to_predicate_map = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<std::u16string>::Leaky g_all_search_keys =
LAZY_INSTANCE_INITIALIZER;
bool SectionPredicate(BrowserAccessibility* start, BrowserAccessibility* node) {
switch (node->GetRole()) {
case ax::mojom::Role::kApplication:
case ax::mojom::Role::kArticle:
case ax::mojom::Role::kBanner:
case ax::mojom::Role::kComplementary:
case ax::mojom::Role::kContentInfo:
case ax::mojom::Role::kHeading:
case ax::mojom::Role::kMain:
case ax::mojom::Role::kNavigation:
case ax::mojom::Role::kRegion:
case ax::mojom::Role::kSearch:
case ax::mojom::Role::kSection:
return true;
default:
return false;
}
}
bool AllInterestingNodesPredicate(BrowserAccessibility* start,
BrowserAccessibility* node) {
BrowserAccessibilityAndroid* android_node =
static_cast<BrowserAccessibilityAndroid*>(node);
return android_node->IsInterestingOnAndroid();
}
void AddToPredicateMap(const char* search_key_ascii,
AccessibilityMatchPredicate predicate) {
std::u16string search_key_utf16 = base::ASCIIToUTF16(search_key_ascii);
g_search_key_to_predicate_map.Get()[search_key_utf16] = predicate;
if (!g_all_search_keys.Get().empty())
g_all_search_keys.Get() += base::ASCIIToUTF16(",");
g_all_search_keys.Get() += search_key_utf16;
}
// These are special unofficial strings sent from TalkBack/BrailleBack
// to jump to certain categories of web elements.
void InitSearchKeyToPredicateMapIfNeeded() {
if (!g_search_key_to_predicate_map.Get().empty())
return;
AddToPredicateMap("ARTICLE", AccessibilityArticlePredicate);
AddToPredicateMap("BUTTON", AccessibilityButtonPredicate);
AddToPredicateMap("CHECKBOX", AccessibilityCheckboxPredicate);
AddToPredicateMap("COMBOBOX", AccessibilityComboboxPredicate);
AddToPredicateMap("CONTROL", AccessibilityControlPredicate);
AddToPredicateMap("FOCUSABLE", AccessibilityFocusablePredicate);
AddToPredicateMap("FRAME", AccessibilityFramePredicate);
AddToPredicateMap("GRAPHIC", AccessibilityGraphicPredicate);
AddToPredicateMap("H1", AccessibilityH1Predicate);
AddToPredicateMap("H2", AccessibilityH2Predicate);
AddToPredicateMap("H3", AccessibilityH3Predicate);
AddToPredicateMap("H4", AccessibilityH4Predicate);
AddToPredicateMap("H5", AccessibilityH5Predicate);
AddToPredicateMap("H6", AccessibilityH6Predicate);
AddToPredicateMap("HEADING", AccessibilityHeadingPredicate);
AddToPredicateMap("LANDMARK", AccessibilityLandmarkPredicate);
AddToPredicateMap("LINK", AccessibilityLinkPredicate);
AddToPredicateMap("LIST", AccessibilityListPredicate);
AddToPredicateMap("LIST_ITEM", AccessibilityListItemPredicate);
AddToPredicateMap("MAIN", AccessibilityMainPredicate);
AddToPredicateMap("MEDIA", AccessibilityMediaPredicate);
AddToPredicateMap("RADIO", AccessibilityRadioButtonPredicate);
AddToPredicateMap("SECTION", SectionPredicate);
AddToPredicateMap("TABLE", AccessibilityTablePredicate);
AddToPredicateMap("TEXT_FIELD", AccessibilityTextfieldPredicate);
AddToPredicateMap("UNVISITED_LINK", AccessibilityUnvisitedLinkPredicate);
AddToPredicateMap("VISITED_LINK", AccessibilityVisitedLinkPredicate);
}
AccessibilityMatchPredicate PredicateForSearchKey(
const std::u16string& element_type) {
InitSearchKeyToPredicateMapIfNeeded();
const auto& iter = g_search_key_to_predicate_map.Get().find(element_type);
if (iter != g_search_key_to_predicate_map.Get().end())
return iter->second;
// If we don't recognize the selector, return any element that a
// screen reader should navigate to.
return AllInterestingNodesPredicate;
}
// The element in the document for which we may be displaying an autofill popup.
int32_t g_element_hosting_autofill_popup_unique_id = -1;
// The element in the document that is the next element after
// |g_element_hosting_autofill_popup_unique_id|.
int32_t g_element_after_element_hosting_autofill_popup_unique_id = -1;
// Autofill popup will not be part of the |AXTree| that is sent by renderer.
// Hence, we need a proxy |AXNode| to represent the autofill popup.
BrowserAccessibility* g_autofill_popup_proxy_node = nullptr;
ui::AXNode* g_autofill_popup_proxy_node_ax_node = nullptr;
void DeleteAutofillPopupProxy() {
if (g_autofill_popup_proxy_node) {
delete g_autofill_popup_proxy_node;
delete g_autofill_popup_proxy_node_ax_node;
g_autofill_popup_proxy_node = nullptr;
}
}
// The most common use of the EXTRA_DATA_TEXT_CHARACTER_LOCATION_KEY
// API is to retrieve character bounds for one word at a time. There
// should never need to be a reason to return more than this many
// character bounding boxes at once. Set the limit much higher than needed
// but small enough to prevent wasting memory and cpu if abused.
const int kMaxCharacterBoundingBoxLen = 1024;
} // anonymous namespace
class WebContentsAccessibilityAndroid::Connector
: public RenderWidgetHostConnector {
public:
Connector(WebContents* web_contents,
WebContentsAccessibilityAndroid* accessibility);
~Connector() override = default;
void DeleteEarly();
// RenderWidgetHostConnector:
void UpdateRenderProcessConnection(
RenderWidgetHostViewAndroid* old_rwhva,
RenderWidgetHostViewAndroid* new_rhwva) override;
private:
std::unique_ptr<WebContentsAccessibilityAndroid> accessibility_;
};
WebContentsAccessibilityAndroid::Connector::Connector(
WebContents* web_contents,
WebContentsAccessibilityAndroid* accessibility)
: RenderWidgetHostConnector(web_contents), accessibility_(accessibility) {
Initialize();
}
void WebContentsAccessibilityAndroid::Connector::DeleteEarly() {
RenderWidgetHostConnector::DestroyEarly();
}
void WebContentsAccessibilityAndroid::Connector::UpdateRenderProcessConnection(
RenderWidgetHostViewAndroid* old_rwhva,
RenderWidgetHostViewAndroid* new_rwhva) {
if (old_rwhva)
old_rwhva->SetWebContentsAccessibility(nullptr);
if (new_rwhva)
new_rwhva->SetWebContentsAccessibility(accessibility_.get());
accessibility_->UpdateBrowserAccessibilityManager();
}
WebContentsAccessibilityAndroid::WebContentsAccessibilityAndroid(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
WebContents* web_contents)
: java_ref_(env, obj),
web_contents_(static_cast<WebContentsImpl*>(web_contents)),
frame_info_initialized_(false),
use_zoom_for_dsf_enabled_(IsUseZoomForDSFEnabled()) {
// We must initialize this after weak_ptr_factory_ because it can result in
// calling UpdateBrowserAccessibilityManager() which accesses
// weak_ptr_factory_.
connector_ = new Connector(web_contents, this);
CollectStats();
}
WebContentsAccessibilityAndroid::WebContentsAccessibilityAndroid(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jlong ax_tree_update_ptr)
: java_ref_(env, obj),
web_contents_(nullptr),
frame_info_initialized_(false),
use_zoom_for_dsf_enabled_(IsUseZoomForDSFEnabled()) {
std::unique_ptr<ui::AXTreeUpdate> ax_tree_snapshot(
reinterpret_cast<ui::AXTreeUpdate*>(ax_tree_update_ptr));
manager_.reset(new BrowserAccessibilityManagerAndroid(*ax_tree_snapshot,
GetWeakPtr(), nullptr));
connector_ = nullptr;
CollectStats();
}
WebContentsAccessibilityAndroid::~WebContentsAccessibilityAndroid() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
// Clean up autofill popup proxy node in case the popup was not dismissed.
DeleteAutofillPopupProxy();
Java_WebContentsAccessibilityImpl_onNativeObjectDestroyed(env, obj);
}
void WebContentsAccessibilityAndroid::UpdateBrowserAccessibilityManager() {
auto* manager = GetRootBrowserAccessibilityManager();
if (manager)
manager->set_web_contents_accessibility(GetWeakPtr());
}
void WebContentsAccessibilityAndroid::DeleteEarly(JNIEnv* env) {
if (connector_) {
connector_->DeleteEarly();
} else {
delete this;
}
}
jboolean WebContentsAccessibilityAndroid::IsEnabled(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
return GetRootBrowserAccessibilityManager() != nullptr;
}
void WebContentsAccessibilityAndroid::Enable(JNIEnv* env,
const JavaParamRef<jobject>& obj) {
BrowserAccessibilityStateImpl* accessibility_state =
BrowserAccessibilityStateImpl::GetInstance();
auto* manager = GetRootBrowserAccessibilityManager();
// First check if we already have a BrowserAccessibilityManager that
// that needs to be connected to this instance. This can happen if
// BAM creation precedes render view updates for the associated
// web contents.
if (manager) {
manager->set_web_contents_accessibility(GetWeakPtr());
return;
}
// Otherwise, enable accessibility globally unless it was
// explicitly disallowed by a command-line flag, then enable it for
// this WebContents if that succeeded.
accessibility_state->OnScreenReaderDetected();
if (accessibility_state->IsAccessibleBrowser() && web_contents_)
web_contents_->AddAccessibilityMode(ui::kAXModeComplete);
}
bool WebContentsAccessibilityAndroid::ShouldRespectDisplayedPasswordText() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return false;
return Java_WebContentsAccessibilityImpl_shouldRespectDisplayedPasswordText(
env, obj);
}
bool WebContentsAccessibilityAndroid::ShouldExposePasswordText() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return false;
return Java_WebContentsAccessibilityImpl_shouldExposePasswordText(env, obj);
}
void WebContentsAccessibilityAndroid::HandlePageLoaded(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handlePageLoaded(env, obj, unique_id);
}
void WebContentsAccessibilityAndroid::HandleContentChanged(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
// If there are a large number of changes it's too expensive to fire all of
// them, so we just fire one on the root instead.
content_changed_events_++;
if (content_changed_events_ < max_content_changed_events_to_fire_) {
// If it's less than the max event count, fire the event on the specific
// node that changed.
Java_WebContentsAccessibilityImpl_handleContentChanged(env, obj, unique_id);
} else if (content_changed_events_ == max_content_changed_events_to_fire_) {
// If it's equal to the max event count, fire the event on the
// root instead.
auto* root_manager = GetRootBrowserAccessibilityManager();
if (root_manager) {
auto* root_node =
static_cast<BrowserAccessibilityAndroid*>(root_manager->GetRoot());
if (root_node) {
Java_WebContentsAccessibilityImpl_handleContentChanged(
env, obj, root_node->unique_id());
}
}
}
}
void WebContentsAccessibilityAndroid::HandleFocusChanged(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleFocusChanged(env, obj, unique_id);
}
void WebContentsAccessibilityAndroid::HandleCheckStateChanged(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleCheckStateChanged(env, obj,
unique_id);
}
void WebContentsAccessibilityAndroid::HandleClicked(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleClicked(env, obj, unique_id);
}
void WebContentsAccessibilityAndroid::HandleScrollPositionChanged(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleScrollPositionChanged(env, obj,
unique_id);
}
void WebContentsAccessibilityAndroid::HandleScrolledToAnchor(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleScrolledToAnchor(env, obj, unique_id);
}
void WebContentsAccessibilityAndroid::AnnounceLiveRegionText(
const std::u16string& text) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
// Do not announce empty text.
if (text.empty())
return;
Java_WebContentsAccessibilityImpl_announceLiveRegionText(
env, obj, base::android::ConvertUTF16ToJavaString(env, text));
}
void WebContentsAccessibilityAndroid::HandleTextSelectionChanged(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleTextSelectionChanged(env, obj,
unique_id);
}
void WebContentsAccessibilityAndroid::HandleEditableTextChanged(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleEditableTextChanged(env, obj,
unique_id);
}
void WebContentsAccessibilityAndroid::HandleSliderChanged(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleSliderChanged(env, obj, unique_id);
}
void WebContentsAccessibilityAndroid::SendDelayedWindowContentChangedEvent() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_sendDelayedWindowContentChangedEvent(env,
obj);
}
void WebContentsAccessibilityAndroid::HandleHover(int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleHover(env, obj, unique_id);
}
bool WebContentsAccessibilityAndroid::OnHoverEvent(
const ui::MotionEventAndroid& event) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return false;
if (!Java_WebContentsAccessibilityImpl_onHoverEvent(
env, obj,
ui::MotionEventAndroid::GetAndroidAction(event.GetAction())))
return false;
// |HitTest| sends an IPC to the render process to do the hit testing.
// The response is handled by HandleHover when it returns.
// Hover event was consumed by accessibility by now. Return true to
// stop the event from proceeding.
if (event.GetAction() != ui::MotionEvent::Action::HOVER_EXIT &&
GetRootBrowserAccessibilityManager()) {
gfx::PointF point = event.GetPointPix();
point.Scale(1 / page_scale_);
GetRootBrowserAccessibilityManager()->HitTest(gfx::ToFlooredPoint(point));
}
return true;
}
void WebContentsAccessibilityAndroid::HandleNavigate() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_handleNavigate(env, obj);
}
void WebContentsAccessibilityAndroid::ClearNodeInfoCacheForGivenId(
int32_t unique_id) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_clearNodeInfoCacheForGivenId(env, obj,
unique_id);
}
base::android::ScopedJavaLocalRef<jstring>
WebContentsAccessibilityAndroid::GetSupportedHtmlElementTypes(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
InitSearchKeyToPredicateMapIfNeeded();
return base::android::ConvertUTF16ToJavaString(env, g_all_search_keys.Get());
}
jint WebContentsAccessibilityAndroid::GetRootId(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
if (auto* root_manager = GetRootBrowserAccessibilityManager()) {
auto* root =
static_cast<BrowserAccessibilityAndroid*>(root_manager->GetRoot());
if (root)
return static_cast<jint>(root->unique_id());
}
return -1;
}
jboolean WebContentsAccessibilityAndroid::IsNodeValid(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
return GetAXFromUniqueID(unique_id) != NULL;
}
void WebContentsAccessibilityAndroid::HitTest(JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint x,
jint y) {
if (auto* root_manager = GetRootBrowserAccessibilityManager())
root_manager->HitTest(gfx::Point(x, y));
}
jboolean WebContentsAccessibilityAndroid::IsEditableText(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->IsTextField();
}
jboolean WebContentsAccessibilityAndroid::IsFocused(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->IsFocused();
}
jint WebContentsAccessibilityAndroid::GetEditableTextSelectionStart(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->GetSelectionStart();
}
jint WebContentsAccessibilityAndroid::GetEditableTextSelectionEnd(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->GetSelectionEnd();
}
base::android::ScopedJavaLocalRef<jintArray>
WebContentsAccessibilityAndroid::GetAbsolutePositionForNode(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return nullptr;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return nullptr;
float dip_scale =
use_zoom_for_dsf_enabled_ ? 1 / root_manager->device_scale_factor() : 1.0;
gfx::Rect absolute_rect = gfx::ScaleToEnclosingRect(
node->GetUnclippedRootFrameBoundsRect(), dip_scale, dip_scale);
int rect[4] = {absolute_rect.x(), absolute_rect.y(), absolute_rect.right(),
absolute_rect.bottom()};
return base::android::ToJavaIntArray(env, rect, static_cast<size_t>(4));
}
static size_t ActualUnignoredChildCount(const ui::AXNode* node) {
size_t count = 0;
for (const ui::AXNode* child : node->children()) {
if (child->IsIgnored()) {
count += ActualUnignoredChildCount(child);
} else {
++count;
}
}
return count;
}
void WebContentsAccessibilityAndroid::UpdateAccessibilityNodeInfoBoundsRect(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& info,
jint unique_id,
BrowserAccessibilityAndroid* node) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return;
float dip_scale =
use_zoom_for_dsf_enabled_ ? 1 / root_manager->device_scale_factor() : 1.0;
gfx::Rect absolute_rect = gfx::ScaleToEnclosingRect(
node->GetUnclippedRootFrameBoundsRect(), dip_scale, dip_scale);
gfx::Rect parent_relative_rect = absolute_rect;
bool is_root = node->PlatformGetParent() == nullptr;
if (!is_root) {
gfx::Rect parent_rect = gfx::ScaleToEnclosingRect(
node->PlatformGetParent()->GetUnclippedRootFrameBoundsRect(), dip_scale,
dip_scale);
parent_relative_rect.Offset(-parent_rect.OffsetFromOrigin());
}
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoLocation(
env, obj, info, unique_id, absolute_rect.x(), absolute_rect.y(),
parent_relative_rect.x(), parent_relative_rect.y(), absolute_rect.width(),
absolute_rect.height(), is_root);
}
jboolean WebContentsAccessibilityAndroid::UpdateCachedAccessibilityNodeInfo(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& info,
jint unique_id) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return false;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
// Update cached nodes by providing new enclosing Rects
UpdateAccessibilityNodeInfoBoundsRect(env, obj, info, unique_id, node);
return true;
}
jboolean WebContentsAccessibilityAndroid::PopulateAccessibilityNodeInfo(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& info,
jint unique_id) {
if (!GetRootBrowserAccessibilityManager())
return false;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
bool is_root = node->PlatformGetParent() == nullptr;
if (!is_root) {
auto* android_node =
static_cast<BrowserAccessibilityAndroid*>(node->PlatformGetParent());
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoParent(
env, obj, info, android_node->unique_id());
}
// Build a vector of child ids
std::vector<int> child_ids;
for (BrowserAccessibility::PlatformChildIterator it =
node->PlatformChildrenBegin();
it != node->PlatformChildrenEnd(); ++it) {
auto* android_node = static_cast<BrowserAccessibilityAndroid*>(it.get());
child_ids.push_back(android_node->unique_id());
}
if (child_ids.size()) {
Java_WebContentsAccessibilityImpl_addAccessibilityNodeInfoChildren(
env, obj, info,
base::android::ToJavaIntArray(env, child_ids.data(), child_ids.size()));
}
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoBooleanAttributes(
env, obj, info, unique_id, node->IsReportingCheckable(),
node->IsChecked(), node->IsClickable(), node->IsContentInvalid(),
node->IsEnabled(), node->IsFocusable(), node->IsFocused(),
node->HasImage(), node->IsPasswordField(), node->IsScrollable(),
node->IsSelected(), node->IsVisibleToUser());
Java_WebContentsAccessibilityImpl_addAccessibilityNodeInfoActions(
env, obj, info, unique_id, node->CanScrollForward(),
node->CanScrollBackward(), node->CanScrollUp(), node->CanScrollDown(),
node->CanScrollLeft(), node->CanScrollRight(), node->IsClickable(),
node->IsTextField(), node->IsEnabled(), node->IsFocusable(),
node->IsFocused(), node->IsCollapsed(), node->IsExpanded(),
node->HasNonEmptyValue(), !node->GetInnerText().empty(),
node->IsSeekControl(), node->IsFormDescendant());
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoBaseAttributes(
env, obj, info, is_root,
base::android::ConvertUTF8ToJavaString(env, node->GetClassName()),
base::android::ConvertUTF8ToJavaString(env, node->GetRoleString()),
base::android::ConvertUTF16ToJavaString(env, node->GetRoleDescription()),
base::android::ConvertUTF16ToJavaString(env, node->GetHint()),
base::android::ConvertUTF16ToJavaString(env, node->GetTargetUrl()),
node->CanOpenPopup(), node->IsDismissable(), node->IsMultiLine(),
node->AndroidInputType(), node->AndroidLiveRegionType(),
base::android::ConvertUTF16ToJavaString(
env, node->GetContentInvalidErrorMessage()));
ScopedJavaLocalRef<jintArray> suggestion_starts_java;
ScopedJavaLocalRef<jintArray> suggestion_ends_java;
ScopedJavaLocalRef<jobjectArray> suggestion_text_java;
std::vector<int> suggestion_starts;
std::vector<int> suggestion_ends;
node->GetSuggestions(&suggestion_starts, &suggestion_ends);
if (suggestion_starts.size() && suggestion_ends.size()) {
suggestion_starts_java = base::android::ToJavaIntArray(
env, suggestion_starts.data(), suggestion_starts.size());
suggestion_ends_java = base::android::ToJavaIntArray(
env, suggestion_ends.data(), suggestion_ends.size());
// Currently we don't retrieve the text of each suggestion, so
// store a blank string for now.
std::vector<std::string> suggestion_text(suggestion_starts.size());
suggestion_text_java =
base::android::ToJavaArrayOfStrings(env, suggestion_text);
}
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoText(
env, obj, info,
base::android::ConvertUTF16ToJavaString(env, node->GetInnerText()),
node->IsLink(), node->IsTextField(),
base::android::ConvertUTF16ToJavaString(
env, node->GetInheritedString16Attribute(
ax::mojom::StringAttribute::kLanguage)),
suggestion_starts_java, suggestion_ends_java, suggestion_text_java,
base::android::ConvertUTF16ToJavaString(env,
node->GetStateDescription()));
std::u16string element_id;
if (node->GetHtmlAttribute("id", &element_id)) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoViewIdResourceName(
env, obj, info,
base::android::ConvertUTF16ToJavaString(env, element_id));
}
UpdateAccessibilityNodeInfoBoundsRect(env, obj, info, unique_id, node);
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoOAttributes(
env, obj, info, node->HasCharacterLocations(),
base::android::ConvertUTF16ToJavaString(env, node->GetHint()));
if (node->IsCollection()) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoCollectionInfo(
env, obj, info, node->RowCount(), node->ColumnCount(),
node->IsHierarchical());
}
if (node->IsCollectionItem() || node->IsHeading()) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoCollectionItemInfo(
env, obj, info, node->RowIndex(), node->RowSpan(), node->ColumnIndex(),
node->ColumnSpan(), node->IsHeading());
}
if (node->GetData().IsRangeValueSupported()) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoRangeInfo(
env, obj, info, node->AndroidRangeType(), node->RangeMin(),
node->RangeMax(), node->RangeCurrentValue());
}
if (ui::IsDialog(node->GetRole())) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoPaneTitle(
env, obj, info,
base::android::ConvertUTF16ToJavaString(env, node->GetInnerText()));
}
if (node->IsTextField()) {
Java_WebContentsAccessibilityImpl_setAccessibilityNodeInfoSelectionAttrs(
env, obj, info, node->GetSelectionStart(), node->GetSelectionEnd());
}
return true;
}
jboolean WebContentsAccessibilityAndroid::PopulateAccessibilityEvent(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& event,
jint unique_id,
jint event_type) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
// We will always set boolean, classname, list and scroll attributes.
Java_WebContentsAccessibilityImpl_setAccessibilityEventBaseAttributes(
env, obj, event, node->IsChecked(), node->IsEnabled(),
node->IsPasswordField(), node->IsScrollable(), node->GetItemIndex(),
node->GetItemCount(), node->GetScrollX(), node->GetScrollY(),
node->GetMaxScrollX(), node->GetMaxScrollY(),
base::android::ConvertUTF8ToJavaString(env, node->GetClassName()));
switch (event_type) {
case ANDROID_ACCESSIBILITY_EVENT_TEXT_CHANGED: {
std::u16string before_text = node->GetTextChangeBeforeText();
std::u16string text = node->GetInnerText();
Java_WebContentsAccessibilityImpl_setAccessibilityEventTextChangedAttrs(
env, obj, event, node->GetTextChangeFromIndex(),
node->GetTextChangeAddedCount(), node->GetTextChangeRemovedCount(),
base::android::ConvertUTF16ToJavaString(env, before_text),
base::android::ConvertUTF16ToJavaString(env, text));
break;
}
case ANDROID_ACCESSIBILITY_EVENT_TEXT_SELECTION_CHANGED: {
std::u16string text = node->GetInnerText();
Java_WebContentsAccessibilityImpl_setAccessibilityEventSelectionAttrs(
env, obj, event, node->GetSelectionStart(), node->GetSelectionEnd(),
node->GetEditableTextLength(),
base::android::ConvertUTF16ToJavaString(env, text));
break;
}
default:
break;
}
return true;
}
void WebContentsAccessibilityAndroid::Click(JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return;
// If it's a heading consisting of only a link, click the link.
if (node->IsHeadingLink()) {
node = static_cast<BrowserAccessibilityAndroid*>(
node->InternalChildrenBegin().get());
}
// Only perform the default action on a node that is enabled. Having the
// ACTION_CLICK action on the node is not sufficient, since TalkBack won't
// announce a control as disabled unless it's also marked as clickable, so
// disabled nodes are secretly clickable if we do not check here.
// Children of disabled controls/widgets will also have the click action, so
// ensure that parents/ancestry chain is enabled as well.
if (node->IsEnabled() && !node->IsDisabledDescendant())
node->manager()->DoDefaultAction(*node);
}
void WebContentsAccessibilityAndroid::Focus(JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node)
node->manager()->SetFocus(*node);
}
void WebContentsAccessibilityAndroid::Blur(JNIEnv* env,
const JavaParamRef<jobject>& obj) {
if (auto* root_manager = GetRootBrowserAccessibilityManager())
root_manager->SetFocus(*root_manager->GetRoot());
}
void WebContentsAccessibilityAndroid::ScrollToMakeNodeVisible(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node) {
node->manager()->ScrollToMakeVisible(
*node, gfx::Rect(node->GetClippedFrameBoundsRect().size()));
}
}
void WebContentsAccessibilityAndroid::SetTextFieldValue(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
const JavaParamRef<jstring>& value) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node) {
node->manager()->SetValue(
*node, base::android::ConvertJavaStringToUTF8(env, value));
}
}
void WebContentsAccessibilityAndroid::SetSelection(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
jint start,
jint end) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node) {
node->manager()->SetSelection(
BrowserAccessibility::AXRange(node->CreatePositionForSelectionAt(start),
node->CreatePositionForSelectionAt(end)));
}
}
jboolean WebContentsAccessibilityAndroid::AdjustSlider(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
jboolean increment) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
BrowserAccessibilityAndroid* android_node =
static_cast<BrowserAccessibilityAndroid*>(node);
if (!android_node->IsSlider() || !android_node->IsEnabled())
return false;
float value =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange);
float min =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange);
float max =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange);
if (max <= min)
return false;
// If this node has defined a step value, move by that amount. Otherwise, to
// behave similarly to an Android SeekBar, move by an increment of ~5%.
float delta;
if (node->HasFloatAttribute(ax::mojom::FloatAttribute::kStepValueForRange)) {
delta =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kStepValueForRange);
// If delta from step value is too small, increase to our minimum amount.
float minimum_move = (max - min) * kMinimumPercentageMoveForSliders;
delta = std::max(delta, minimum_move);
} else {
delta = (max - min) / kDefaultNumberOfTicksForSliders;
}
// Add/Subtract based on |increment| boolean, then clamp to range.
float original_value = value;
value += (increment ? delta : -delta);
value = base::ClampToRange(value, min, max);
if (value != original_value) {
node->manager()->SetValue(*node, base::NumberToString(value));
return true;
}
return false;
}
void WebContentsAccessibilityAndroid::ShowContextMenu(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node)
node->manager()->ShowContextMenu(*node);
}
jint WebContentsAccessibilityAndroid::FindElementType(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint start_id,
const JavaParamRef<jstring>& element_type_str,
jboolean forwards,
jboolean can_wrap_to_last_element) {
BrowserAccessibilityAndroid* start_node = GetAXFromUniqueID(start_id);
if (!start_node)
return 0;
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return 0;
BrowserAccessibility* root = root_manager->GetRoot();
if (!root)
return 0;
AccessibilityMatchPredicate predicate = PredicateForSearchKey(
base::android::ConvertJavaStringToUTF16(env, element_type_str));
OneShotAccessibilityTreeSearch tree_search(root);
tree_search.SetStartNode(start_node);
tree_search.SetDirection(forwards
? OneShotAccessibilityTreeSearch::FORWARDS
: OneShotAccessibilityTreeSearch::BACKWARDS);
tree_search.SetResultLimit(1);
tree_search.SetImmediateDescendantsOnly(false);
tree_search.SetCanWrapToLastElement(can_wrap_to_last_element);
tree_search.SetOnscreenOnly(false);
tree_search.AddPredicate(predicate);
if (tree_search.CountMatches() == 0)
return 0;
auto* android_node =
static_cast<BrowserAccessibilityAndroid*>(tree_search.GetMatchAtIndex(0));
int32_t element_id = android_node->unique_id();
// Navigate forwards to the autofill popup's proxy node if focus is currently
// on the element hosting the autofill popup. Once within the popup, a back
// press will navigate back to the element hosting the popup. If user swipes
// past last suggestion in the popup, or swipes left from the first suggestion
// in the popup, we will navigate to the element that is the next element in
// the document after the element hosting the popup.
if (forwards && start_id == g_element_hosting_autofill_popup_unique_id &&
g_autofill_popup_proxy_node) {
g_element_after_element_hosting_autofill_popup_unique_id = element_id;
auto* proxy_android_node =
static_cast<BrowserAccessibilityAndroid*>(g_autofill_popup_proxy_node);
return proxy_android_node->unique_id();
}
return element_id;
}
jboolean WebContentsAccessibilityAndroid::NextAtGranularity(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint granularity,
jboolean extend_selection,
jint unique_id,
jint cursor_index) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return false;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
jint start_index = -1;
int end_index = -1;
if (root_manager->NextAtGranularity(granularity, cursor_index, node,
&start_index, &end_index)) {
std::u16string text = node->GetInnerText();
Java_WebContentsAccessibilityImpl_finishGranularityMoveNext(
env, obj, base::android::ConvertUTF16ToJavaString(env, text),
extend_selection, start_index, end_index);
return true;
}
return false;
}
jint WebContentsAccessibilityAndroid::GetTextLength(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return -1;
std::u16string text = node->GetInnerText();
return text.size();
}
void WebContentsAccessibilityAndroid::AddSpellingErrorForTesting(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
jint start_offset,
jint end_offset) {
BrowserAccessibility* node = GetAXFromUniqueID(unique_id);
CHECK(node);
while (node->GetRole() != ax::mojom::Role::kStaticText &&
node->InternalChildCount() > 0) {
node = node->InternalChildrenBegin().get();
}
CHECK(node->GetRole() == ax::mojom::Role::kStaticText);
std::u16string text = node->GetInnerText();
CHECK_LT(start_offset, static_cast<int>(text.size()));
CHECK_LE(end_offset, static_cast<int>(text.size()));
ui::AXNodeData data = node->GetData();
data.AddIntListAttribute(ax::mojom::IntListAttribute::kMarkerStarts,
{start_offset});
data.AddIntListAttribute(ax::mojom::IntListAttribute::kMarkerEnds,
{end_offset});
data.AddIntListAttribute(
ax::mojom::IntListAttribute::kMarkerTypes,
{static_cast<int>(ax::mojom::MarkerType::kSuggestion)});
node->node()->SetData(data);
}
jboolean WebContentsAccessibilityAndroid::PreviousAtGranularity(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint granularity,
jboolean extend_selection,
jint unique_id,
jint cursor_index) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return false;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
jint start_index = -1;
int end_index = -1;
if (root_manager->PreviousAtGranularity(granularity, cursor_index, node,
&start_index, &end_index)) {
Java_WebContentsAccessibilityImpl_finishGranularityMovePrevious(
env, obj,
base::android::ConvertUTF16ToJavaString(env, node->GetInnerText()),
extend_selection, start_index, end_index);
return true;
}
return false;
}
void WebContentsAccessibilityAndroid::MoveAccessibilityFocus(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint old_unique_id,
jint new_unique_id) {
BrowserAccessibilityAndroid* old_node = GetAXFromUniqueID(old_unique_id);
if (old_node)
old_node->manager()->ClearAccessibilityFocus(*old_node);
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(new_unique_id);
if (!node)
return;
node->manager()->SetAccessibilityFocus(*node);
// When Android sets accessibility focus to a node, we load inline text
// boxes for that node so that subsequent requests for character bounding
// boxes will succeed. However, don't do that for the root of the tree,
// as that will result in loading inline text boxes for the whole tree.
if (node != node->manager()->GetRoot())
node->manager()->LoadInlineTextBoxes(*node);
}
bool WebContentsAccessibilityAndroid::IsSlider(JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->GetRole() == ax::mojom::Role::kSlider;
}
void WebContentsAccessibilityAndroid::OnAutofillPopupDisplayed(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager ||
!base::FeatureList::IsEnabled(features::kAndroidAutofillAccessibility))
return;
BrowserAccessibility* current_focus = root_manager->GetFocus();
if (current_focus == nullptr) {
return;
}
DeleteAutofillPopupProxy();
g_autofill_popup_proxy_node = BrowserAccessibility::Create();
g_autofill_popup_proxy_node_ax_node = new ui::AXNode(nullptr, nullptr, -1, 0);
ui::AXNodeData ax_node_data;
ax_node_data.role = ax::mojom::Role::kMenu;
ax_node_data.SetName("Autofill");
ax_node_data.SetRestriction(ax::mojom::Restriction::kReadOnly);
ax_node_data.AddState(ax::mojom::State::kFocusable);
ax_node_data.AddBoolAttribute(ax::mojom::BoolAttribute::kSelected, false);
g_autofill_popup_proxy_node_ax_node->SetData(ax_node_data);
g_autofill_popup_proxy_node->Init(root_manager,
g_autofill_popup_proxy_node_ax_node);
auto* android_node = static_cast<BrowserAccessibilityAndroid*>(current_focus);
g_element_hosting_autofill_popup_unique_id = android_node->unique_id();
}
void WebContentsAccessibilityAndroid::OnAutofillPopupDismissed(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
g_element_hosting_autofill_popup_unique_id = -1;
g_element_after_element_hosting_autofill_popup_unique_id = -1;
DeleteAutofillPopupProxy();
}
jint WebContentsAccessibilityAndroid::
GetIdForElementAfterElementHostingAutofillPopup(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
if (!base::FeatureList::IsEnabled(features::kAndroidAutofillAccessibility) ||
g_element_after_element_hosting_autofill_popup_unique_id == -1 ||
GetAXFromUniqueID(
g_element_after_element_hosting_autofill_popup_unique_id) == nullptr)
return 0;
return g_element_after_element_hosting_autofill_popup_unique_id;
}
jboolean WebContentsAccessibilityAndroid::IsAutofillPopupNode(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
auto* android_node =
static_cast<BrowserAccessibilityAndroid*>(g_autofill_popup_proxy_node);
return g_autofill_popup_proxy_node && android_node->unique_id() == unique_id;
}
bool WebContentsAccessibilityAndroid::Scroll(JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
int direction,
bool is_page_scroll) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->Scroll(direction, is_page_scroll);
}
bool WebContentsAccessibilityAndroid::SetRangeValue(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id,
float value) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
BrowserAccessibilityAndroid* android_node =
static_cast<BrowserAccessibilityAndroid*>(node);
if (!android_node->GetData().IsRangeValueSupported())
return false;
float min =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange);
float max =
node->GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange);
if (max <= min)
return false;
value = base::ClampToRange(value, min, max);
node->manager()->SetValue(*node, base::NumberToString(value));
return true;
}
jboolean WebContentsAccessibilityAndroid::AreInlineTextBoxesLoaded(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return false;
return node->AreInlineTextBoxesLoaded();
}
void WebContentsAccessibilityAndroid::LoadInlineTextBoxes(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jint unique_id) {
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (node)
node->manager()->LoadInlineTextBoxes(*node);
}
base::android::ScopedJavaLocalRef<jintArray>
WebContentsAccessibilityAndroid::GetCharacterBoundingBoxes(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
jint unique_id,
jint start,
jint len) {
auto* root_manager = GetRootBrowserAccessibilityManager();
if (!root_manager)
return nullptr;
BrowserAccessibilityAndroid* node = GetAXFromUniqueID(unique_id);
if (!node)
return nullptr;
if (len <= 0 || len > kMaxCharacterBoundingBoxLen) {
LOG(ERROR) << "Trying to request EXTRA_DATA_TEXT_CHARACTER_LOCATION_KEY "
<< "with a length of " << len << ". Valid values are between 1 "
<< "and " << kMaxCharacterBoundingBoxLen;
return nullptr;
}
float dip_scale =
use_zoom_for_dsf_enabled_ ? 1 / root_manager->device_scale_factor() : 1.0;
gfx::Rect object_bounds = node->GetUnclippedRootFrameBoundsRect();
int coords[4 * len];
for (int i = 0; i < len; i++) {
gfx::Rect char_bounds = node->GetUnclippedRootFrameInnerTextRangeBoundsRect(
start + i, start + i + 1);
if (char_bounds.IsEmpty())
char_bounds = object_bounds;
char_bounds = gfx::ScaleToEnclosingRect(char_bounds, dip_scale, dip_scale);
coords[4 * i + 0] = char_bounds.x();
coords[4 * i + 1] = char_bounds.y();
coords[4 * i + 2] = char_bounds.right();
coords[4 * i + 3] = char_bounds.bottom();
}
return base::android::ToJavaIntArray(env, coords,
static_cast<size_t>(4 * len));
}
BrowserAccessibilityManagerAndroid*
WebContentsAccessibilityAndroid::GetRootBrowserAccessibilityManager() {
if (manager_) {
return manager_.get();
}
return static_cast<BrowserAccessibilityManagerAndroid*>(
web_contents_->GetRootBrowserAccessibilityManager());
}
BrowserAccessibilityAndroid* WebContentsAccessibilityAndroid::GetAXFromUniqueID(
int32_t unique_id) {
return BrowserAccessibilityAndroid::GetFromUniqueId(unique_id);
}
void WebContentsAccessibilityAndroid::UpdateFrameInfo(float page_scale) {
page_scale_ = page_scale;
if (frame_info_initialized_)
return;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_WebContentsAccessibilityImpl_notifyFrameInfoInitialized(env, obj);
frame_info_initialized_ = true;
}
void WebContentsAccessibilityAndroid::CollectStats() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
int event_type_mask =
Java_WebContentsAccessibilityImpl_getAccessibilityServiceEventTypeMask(
env, obj);
EVENT_TYPE_HISTOGRAM(event_type_mask, ANNOUNCEMENT);
EVENT_TYPE_HISTOGRAM(event_type_mask, ASSIST_READING_CONTEXT);
EVENT_TYPE_HISTOGRAM(event_type_mask, GESTURE_DETECTION_END);
EVENT_TYPE_HISTOGRAM(event_type_mask, GESTURE_DETECTION_START);
EVENT_TYPE_HISTOGRAM(event_type_mask, NOTIFICATION_STATE_CHANGED);
EVENT_TYPE_HISTOGRAM(event_type_mask, TOUCH_EXPLORATION_GESTURE_END);
EVENT_TYPE_HISTOGRAM(event_type_mask, TOUCH_EXPLORATION_GESTURE_START);
EVENT_TYPE_HISTOGRAM(event_type_mask, TOUCH_INTERACTION_END);
EVENT_TYPE_HISTOGRAM(event_type_mask, TOUCH_INTERACTION_START);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_ACCESSIBILITY_FOCUSED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_ACCESSIBILITY_FOCUS_CLEARED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_CLICKED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_CONTEXT_CLICKED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_FOCUSED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_HOVER_ENTER);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_HOVER_EXIT);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_LONG_CLICKED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_SCROLLED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_SELECTED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_TEXT_CHANGED);
EVENT_TYPE_HISTOGRAM(event_type_mask, VIEW_TEXT_SELECTION_CHANGED);
EVENT_TYPE_HISTOGRAM(event_type_mask,
VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY);
EVENT_TYPE_HISTOGRAM(event_type_mask, WINDOWS_CHANGED);
EVENT_TYPE_HISTOGRAM(event_type_mask, WINDOW_CONTENT_CHANGED);
EVENT_TYPE_HISTOGRAM(event_type_mask, WINDOW_STATE_CHANGED);
int feedback_type_mask =
Java_WebContentsAccessibilityImpl_getAccessibilityServiceFeedbackTypeMask(
env, obj);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, SPOKEN);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, HAPTIC);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, AUDIBLE);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, VISUAL);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, GENERIC);
FEEDBACK_TYPE_HISTOGRAM(feedback_type_mask, BRAILLE);
int flags_mask =
Java_WebContentsAccessibilityImpl_getAccessibilityServiceFlagsMask(env,
obj);
FLAGS_HISTOGRAM(flags_mask, INCLUDE_NOT_IMPORTANT_VIEWS);
FLAGS_HISTOGRAM(flags_mask, REQUEST_TOUCH_EXPLORATION_MODE);
FLAGS_HISTOGRAM(flags_mask, REQUEST_ENHANCED_WEB_ACCESSIBILITY);
FLAGS_HISTOGRAM(flags_mask, REPORT_VIEW_IDS);
FLAGS_HISTOGRAM(flags_mask, REQUEST_FILTER_KEY_EVENTS);
FLAGS_HISTOGRAM(flags_mask, RETRIEVE_INTERACTIVE_WINDOWS);
FLAGS_HISTOGRAM(flags_mask, FORCE_DIRECT_BOOT_AWARE);
int capabilities_mask =
Java_WebContentsAccessibilityImpl_getAccessibilityServiceCapabilitiesMask(
env, obj);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask, CAN_RETRIEVE_WINDOW_CONTENT);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask, CAN_REQUEST_TOUCH_EXPLORATION);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask,
CAN_REQUEST_ENHANCED_WEB_ACCESSIBILITY);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask, CAN_REQUEST_FILTER_KEY_EVENTS);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask, CAN_CONTROL_MAGNIFICATION);
CAPABILITY_TYPE_HISTOGRAM(capabilities_mask, CAN_PERFORM_GESTURES);
}
base::WeakPtr<WebContentsAccessibilityAndroid>
WebContentsAccessibilityAndroid::GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
jlong JNI_WebContentsAccessibilityImpl_InitWithAXTree(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jlong ax_tree_update_ptr) {
return reinterpret_cast<intptr_t>(
new WebContentsAccessibilityAndroid(env, obj, ax_tree_update_ptr));
}
jlong JNI_WebContentsAccessibilityImpl_Init(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& jweb_contents) {
WebContents* web_contents = WebContents::FromJavaWebContents(jweb_contents);
DCHECK(web_contents);
return reinterpret_cast<intptr_t>(
new WebContentsAccessibilityAndroid(env, obj, web_contents));
}
} // namespace content