blob: a1c6e35fab648d89de697280d085ee46cef3ab58 [file] [log] [blame]
// Copyright 2013 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/browser_accessibility_android.h"
#include "base/i18n/break_iterator.h"
#include "base/lazy_instance.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/app/strings/grit/content_strings.h"
#include "content/browser/accessibility/browser_accessibility_manager_android.h"
#include "content/common/accessibility_messages.h"
#include "content/public/common/content_client.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/accessibility/ax_assistant_structure.h"
#include "ui/accessibility/ax_role_properties.h"
#include "ui/accessibility/platform/ax_android_constants.h"
#include "ui/accessibility/platform/ax_unique_id.h"
namespace {
// These are enums from android.text.InputType in Java:
enum {
ANDROID_TEXT_INPUTTYPE_TYPE_NULL = 0,
ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME = 0x4,
ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE = 0x14,
ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME = 0x24,
ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER = 0x2,
ANDROID_TEXT_INPUTTYPE_TYPE_PHONE = 0x3,
ANDROID_TEXT_INPUTTYPE_TYPE_TEXT = 0x1,
ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI = 0x11,
ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EDIT_TEXT = 0xa1,
ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL = 0xd1,
ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD = 0xe1
};
// These are enums from android.view.View in Java:
enum {
ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE = 0,
ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE = 1,
ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 2
};
// These are enums from
// android.view.accessibility.AccessibilityNodeInfo.RangeInfo in Java:
enum {
ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT = 1
};
static bool HasListAncestor(const content::BrowserAccessibility* node) {
if (node == nullptr)
return false; // Base case
if (ui::IsStaticList(node->GetRole()))
return true;
return HasListAncestor(node->InternalGetParent());
}
static bool HasListDescendant(const content::BrowserAccessibility* current,
const content::BrowserAccessibility* root) {
// Only check role of descendants
if (current != root) {
if (ui::IsStaticList(current->GetRole()))
return true;
}
int num_children = current->InternalChildCount();
for (int i = 0; i < num_children; ++i) {
if (HasListDescendant(current->InternalGetChild(i), root))
return true;
}
return false;
}
/*
Determines:
1. If this is an ancestor of any lists
2. If this list is a descendant of any lists
Talkback uses this information to report if the list has levels, and if so,
which level is currently selected
*/
static bool IsHierarchicalList(const content::BrowserAccessibility* node) {
// Only makes sense to run if |node| is already a list
DCHECK(ui::IsStaticList(node->GetRole()));
if (node == nullptr)
return false;
bool found_list_in_descendants = HasListDescendant(node, node);
bool found_list_in_ancestors = HasListAncestor(node->InternalGetParent());
return (found_list_in_descendants || found_list_in_ancestors);
}
} // namespace
namespace content {
// static
BrowserAccessibility* BrowserAccessibility::Create() {
return new BrowserAccessibilityAndroid();
}
using UniqueIdMap = std::unordered_map<int32_t, BrowserAccessibilityAndroid*>;
// Map from each AXPlatformNode's unique id to its instance.
base::LazyInstance<UniqueIdMap>::Leaky g_unique_id_map =
LAZY_INSTANCE_INITIALIZER;
// static
BrowserAccessibilityAndroid* BrowserAccessibilityAndroid::GetFromUniqueId(
int32_t unique_id) {
UniqueIdMap* unique_ids = g_unique_id_map.Pointer();
auto iter = unique_ids->find(unique_id);
if (iter != unique_ids->end())
return iter->second;
return nullptr;
}
BrowserAccessibilityAndroid::BrowserAccessibilityAndroid() {
g_unique_id_map.Get()[unique_id()] = this;
}
BrowserAccessibilityAndroid::~BrowserAccessibilityAndroid() {
if (unique_id())
g_unique_id_map.Get().erase(unique_id());
}
bool BrowserAccessibilityAndroid::IsNative() const {
return true;
}
void BrowserAccessibilityAndroid::OnLocationChanged() {
auto* manager =
static_cast<BrowserAccessibilityManagerAndroid*>(this->manager());
manager->FireLocationChanged(this);
}
base::string16 BrowserAccessibilityAndroid::GetValue() const {
base::string16 value = BrowserAccessibility::GetValue();
// Optionally replace entered password text with bullet characters
// based on a user preference.
if (IsPassword()) {
auto* manager =
static_cast<BrowserAccessibilityManagerAndroid*>(this->manager());
if (manager->ShouldRespectDisplayedPasswordText()) {
// In the Chrome accessibility tree, the value of a password node is
// unobscured. However, if ShouldRespectDisplayedPasswordText() returns
// true we should try to expose whatever's actually visually displayed,
// whether that's the actual password or dots or whatever. To do this
// we rely on the password field's shadow dom.
value = base::UTF8ToUTF16(ComputeAccessibleNameFromDescendants());
} else if (!manager->ShouldExposePasswordText()) {
value = base::string16(value.size(), ui::kSecurePasswordBullet);
}
}
return value;
}
bool BrowserAccessibilityAndroid::PlatformIsLeaf() const {
if (BrowserAccessibility::PlatformIsLeaf())
return true;
// Iframes are always allowed to contain children.
if (IsIframe() || GetRole() == ax::mojom::Role::kRootWebArea ||
GetRole() == ax::mojom::Role::kWebArea) {
return false;
}
// Date and time controls should drop their children.
switch (GetRole()) {
case ax::mojom::Role::kDate:
case ax::mojom::Role::kDateTime:
case ax::mojom::Role::kInputTime:
return true;
default:
break;
}
// If it has a focusable child, we definitely can't leave out children.
if (HasFocusableNonOptionChild())
return false;
BrowserAccessibilityManagerAndroid* manager_android =
static_cast<BrowserAccessibilityManagerAndroid*>(manager());
if (manager_android->prune_tree_for_screen_reader()) {
// Headings with text can drop their children.
base::string16 name = GetText();
if (GetRole() == ax::mojom::Role::kHeading && !name.empty())
return true;
// Focusable nodes with text can drop their children.
if (HasState(ax::mojom::State::kFocusable) && !name.empty())
return true;
// Nodes with only static text as children can drop their children.
if (HasOnlyTextChildren())
return true;
}
return false;
}
bool BrowserAccessibilityAndroid::CanFireEvents() const {
return true;
}
bool BrowserAccessibilityAndroid::IsCheckable() const {
return HasIntAttribute(ax::mojom::IntAttribute::kCheckedState);
}
bool BrowserAccessibilityAndroid::IsChecked() const {
return GetData().GetCheckedState() == ax::mojom::CheckedState::kTrue;
}
bool BrowserAccessibilityAndroid::IsClickable() const {
// If it has a custom default action verb except for
// ax::mojom::DefaultActionVerb::kClickAncestor, it's definitely clickable.
// ax::mojom::DefaultActionVerb::kClickAncestor is used when an element with a
// click listener is present in its ancestry chain.
if (HasIntAttribute(ax::mojom::IntAttribute::kDefaultActionVerb) &&
(GetData().GetDefaultActionVerb() !=
ax::mojom::DefaultActionVerb::kClickAncestor)) {
return true;
}
// Otherwise return true if it's focusable, but skip web areas and iframes.
if (IsIframe() || (GetRole() == ax::mojom::Role::kRootWebArea))
return false;
return IsFocusable();
}
bool BrowserAccessibilityAndroid::IsCollapsed() const {
return HasState(ax::mojom::State::kCollapsed);
}
// TODO(dougt) Move to ax_role_properties?
bool BrowserAccessibilityAndroid::IsCollection() const {
return (ui::IsTableLike(GetRole()) || GetRole() == ax::mojom::Role::kList ||
GetRole() == ax::mojom::Role::kListBox ||
GetRole() == ax::mojom::Role::kDescriptionList ||
GetRole() == ax::mojom::Role::kTree);
}
bool BrowserAccessibilityAndroid::IsCollectionItem() const {
return (GetRole() == ax::mojom::Role::kCell ||
GetRole() == ax::mojom::Role::kColumnHeader ||
GetRole() == ax::mojom::Role::kDescriptionListTerm ||
GetRole() == ax::mojom::Role::kListBoxOption ||
GetRole() == ax::mojom::Role::kListItem ||
GetRole() == ax::mojom::Role::kRowHeader ||
GetRole() == ax::mojom::Role::kTreeItem);
}
bool BrowserAccessibilityAndroid::IsContentInvalid() const {
return HasIntAttribute(ax::mojom::IntAttribute::kInvalidState) &&
GetData().GetInvalidState() != ax::mojom::InvalidState::kFalse;
}
bool BrowserAccessibilityAndroid::IsDismissable() const {
return false; // No concept of "dismissable" on the web currently.
}
bool BrowserAccessibilityAndroid::IsEditableText() const {
return IsPlainTextField() || IsRichTextField();
}
bool BrowserAccessibilityAndroid::IsEnabled() const {
return GetData().GetRestriction() != ax::mojom::Restriction::kDisabled;
}
bool BrowserAccessibilityAndroid::IsExpanded() const {
return HasState(ax::mojom::State::kExpanded);
}
bool BrowserAccessibilityAndroid::IsFocusable() const {
// If it's an iframe element, or the root element of a child frame,
// only mark it as focusable if the element has an explicit name.
// Otherwise mark it as not focusable to avoid the user landing on
// empty container elements in the tree.
if (IsIframe() ||
(GetRole() == ax::mojom::Role::kRootWebArea && PlatformGetParent()))
return HasStringAttribute(ax::mojom::StringAttribute::kName);
return HasState(ax::mojom::State::kFocusable);
}
bool BrowserAccessibilityAndroid::IsFocused() const {
return manager()->GetFocus() == this;
}
bool BrowserAccessibilityAndroid::IsHeading() const {
BrowserAccessibilityAndroid* parent =
static_cast<BrowserAccessibilityAndroid*>(PlatformGetParent());
if (parent && parent->IsHeading())
return true;
return ui::IsHeadingOrTableHeader(GetRole());
}
bool BrowserAccessibilityAndroid::IsHierarchical() const {
return (GetRole() == ax::mojom::Role::kTree ||
(ui::IsStaticList(GetRole()) && IsHierarchicalList(this)));
}
bool BrowserAccessibilityAndroid::IsLink() const {
return ui::IsLink(GetRole());
}
bool BrowserAccessibilityAndroid::IsMultiLine() const {
return HasState(ax::mojom::State::kMultiline);
}
bool BrowserAccessibilityAndroid::IsPassword() const {
return HasState(ax::mojom::State::kProtected);
}
bool BrowserAccessibilityAndroid::IsRangeType() const {
return (GetRole() == ax::mojom::Role::kProgressIndicator ||
GetRole() == ax::mojom::Role::kMeter ||
GetRole() == ax::mojom::Role::kScrollBar ||
GetRole() == ax::mojom::Role::kSlider ||
(GetRole() == ax::mojom::Role::kSplitter && IsFocusable()));
}
bool BrowserAccessibilityAndroid::IsScrollable() const {
return HasIntAttribute(ax::mojom::IntAttribute::kScrollXMax);
}
bool BrowserAccessibilityAndroid::IsSelected() const {
return GetBoolAttribute(ax::mojom::BoolAttribute::kSelected);
}
bool BrowserAccessibilityAndroid::IsSlider() const {
return GetRole() == ax::mojom::Role::kSlider;
}
bool BrowserAccessibilityAndroid::IsVisibleToUser() const {
return !HasState(ax::mojom::State::kInvisible);
}
bool BrowserAccessibilityAndroid::IsInterestingOnAndroid() const {
// The root is not interesting if it doesn't have a title, even
// though it's focusable.
if (GetRole() == ax::mojom::Role::kRootWebArea && GetText().empty())
return false;
// Mark as uninteresting if it's hidden, even if it is focusable.
if (HasState(ax::mojom::State::kInvisible))
return false;
// Focusable nodes are always interesting. Note that IsFocusable()
// already skips over things like iframes and child frames that are
// technically focusable but shouldn't be exposed as focusable on Android.
if (IsFocusable())
return true;
// If it's not focusable but has a control role, then it's interesting.
if (ui::IsControl(GetRole()))
return true;
// A non focusable child of a control is not interesting
const BrowserAccessibility* parent = PlatformGetParent();
while (parent != nullptr) {
if (ui::IsControl(parent->GetRole()))
return false;
parent = parent->PlatformGetParent();
}
// Otherwise, the interesting nodes are leaf nodes with non-whitespace text.
return PlatformIsLeaf() &&
!base::ContainsOnlyChars(GetText(), base::kWhitespaceUTF16);
}
const BrowserAccessibilityAndroid*
BrowserAccessibilityAndroid::GetSoleInterestingNodeFromSubtree() const {
if (IsInterestingOnAndroid())
return this;
const BrowserAccessibilityAndroid* sole_interesting_node = nullptr;
for (uint32_t i = 0; i < PlatformChildCount(); ++i) {
const BrowserAccessibilityAndroid* interesting_node =
static_cast<const BrowserAccessibilityAndroid*>(PlatformGetChild(i))->
GetSoleInterestingNodeFromSubtree();
if (interesting_node && sole_interesting_node) {
// If there are two interesting nodes, return nullptr.
return nullptr;
} else if (interesting_node) {
sole_interesting_node = interesting_node;
}
}
return sole_interesting_node;
}
bool BrowserAccessibilityAndroid::AreInlineTextBoxesLoaded() const {
if (GetRole() == ax::mojom::Role::kStaticText)
return InternalChildCount() > 0;
// Return false if any descendant needs to load inline text boxes.
for (uint32_t i = 0; i < InternalChildCount(); ++i) {
BrowserAccessibilityAndroid* child =
static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
if (!child->AreInlineTextBoxesLoaded())
return false;
}
// Otherwise return true - either they're all loaded, or there aren't
// any descendants that need to load inline text boxes.
return true;
}
bool BrowserAccessibilityAndroid::CanOpenPopup() const {
return HasIntAttribute(ax::mojom::IntAttribute::kHasPopup);
}
const char* BrowserAccessibilityAndroid::GetClassName() const {
ax::mojom::Role role = GetRole();
// On Android, contenteditable needs to be handled the same as any
// other text field.
if (IsPlainTextField() || IsRichTextField())
role = ax::mojom::Role::kTextField;
return ui::AXRoleToAndroidClassName(role, PlatformGetParent() != nullptr);
}
base::string16 BrowserAccessibilityAndroid::GetText() const {
if (IsIframe() || GetRole() == ax::mojom::Role::kWebArea) {
return base::string16();
}
// First, always return the |value| attribute if this is an
// input field.
base::string16 value = GetValue();
if (ShouldExposeValueAsName())
return value;
// For color wells, the color is stored in separate attributes.
// Perhaps we could return color names in the future?
if (GetRole() == ax::mojom::Role::kColorWell) {
unsigned int color = static_cast<unsigned int>(
GetIntAttribute(ax::mojom::IntAttribute::kColorValue));
unsigned int red = SkColorGetR(color);
unsigned int green = SkColorGetG(color);
unsigned int blue = SkColorGetB(color);
return base::UTF8ToUTF16(
base::StringPrintf("#%02X%02X%02X", red, green, blue));
}
base::string16 text = GetString16Attribute(ax::mojom::StringAttribute::kName);
if (text.empty())
text = value;
// If this is the root element, give up now, allow it to have no
// accessible text. For almost all other focusable nodes we try to
// get text from contents, but for the root element that's redundant
// and often way too verbose.
if (GetRole() == ax::mojom::Role::kRootWebArea)
return text;
// This is called from PlatformIsLeaf, so don't call PlatformChildCount
// from within this!
if (text.empty() && (HasOnlyTextChildren() ||
(IsFocusable() && HasOnlyTextAndImageChildren()))) {
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
text += static_cast<BrowserAccessibilityAndroid*>(child)->GetText();
}
}
if (text.empty() && (ui::IsLink(GetRole()) || ui::IsImage(GetRole())) &&
!HasExplicitlyEmptyName()) {
base::string16 url = GetString16Attribute(ax::mojom::StringAttribute::kUrl);
text = ui::AXUrlBaseText(url);
}
return text;
}
base::string16 BrowserAccessibilityAndroid::GetHint() const {
std::vector<base::string16> strings;
// If we're returning the value as the main text, the name needs to be
// part of the hint.
if (ShouldExposeValueAsName()) {
base::string16 name =
GetString16Attribute(ax::mojom::StringAttribute::kName);
if (!name.empty())
strings.push_back(name);
}
if (GetData().GetNameFrom() != ax::mojom::NameFrom::kPlaceholder &&
GetData().GetIntAttribute(ax::mojom::IntAttribute::kDescriptionFrom) !=
static_cast<int32_t>(ax::mojom::DescriptionFrom::kPlaceholder)) {
base::string16 placeholder =
GetString16Attribute(ax::mojom::StringAttribute::kPlaceholder);
if (!placeholder.empty())
strings.push_back(placeholder);
}
base::string16 description =
GetString16Attribute(ax::mojom::StringAttribute::kDescription);
if (!description.empty())
strings.push_back(description);
return base::JoinString(strings, base::ASCIIToUTF16(" "));
}
std::string BrowserAccessibilityAndroid::GetRoleString() const {
return ui::ToString(GetRole());
}
base::string16 BrowserAccessibilityAndroid::GetRoleDescription() const {
content::ContentClient* content_client = content::GetContentClient();
// As a special case, if we have a heading level return a string like
// "heading level 1", etc.
if (GetRole() == ax::mojom::Role::kHeading) {
int level = GetIntAttribute(ax::mojom::IntAttribute::kHierarchicalLevel);
if (level >= 1 && level <= 6) {
std::vector<base::string16> values;
values.push_back(base::IntToString16(level));
return base::ReplaceStringPlaceholders(
content_client->GetLocalizedString(IDS_AX_ROLE_HEADING_WITH_LEVEL),
values, nullptr);
}
}
int message_id = -1;
switch (GetRole()) {
case ax::mojom::Role::kAbbr:
// No role description.
break;
case ax::mojom::Role::kAlertDialog:
message_id = IDS_AX_ROLE_ALERT_DIALOG;
break;
case ax::mojom::Role::kAlert:
message_id = IDS_AX_ROLE_ALERT;
break;
case ax::mojom::Role::kAnchor:
// No role description.
break;
case ax::mojom::Role::kAnnotation:
// No role description.
break;
case ax::mojom::Role::kApplication:
message_id = IDS_AX_ROLE_APPLICATION;
break;
case ax::mojom::Role::kArticle:
message_id = IDS_AX_ROLE_ARTICLE;
break;
case ax::mojom::Role::kAudio:
message_id = IDS_AX_MEDIA_AUDIO_ELEMENT;
break;
case ax::mojom::Role::kBanner:
message_id = IDS_AX_ROLE_BANNER;
break;
case ax::mojom::Role::kBlockquote:
message_id = IDS_AX_ROLE_BLOCKQUOTE;
break;
case ax::mojom::Role::kButton:
message_id = IDS_AX_ROLE_BUTTON;
break;
case ax::mojom::Role::kCanvas:
// No role description.
break;
case ax::mojom::Role::kCaption:
// No role description.
break;
case ax::mojom::Role::kCaret:
// No role description.
break;
case ax::mojom::Role::kCell:
// No role description.
break;
case ax::mojom::Role::kCheckBox:
message_id = IDS_AX_ROLE_CHECK_BOX;
break;
case ax::mojom::Role::kClient:
// No role description.
break;
case ax::mojom::Role::kColorWell:
message_id = IDS_AX_ROLE_COLOR_WELL;
break;
case ax::mojom::Role::kColumnHeader:
message_id = IDS_AX_ROLE_COLUMN_HEADER;
break;
case ax::mojom::Role::kColumn:
// No role description.
break;
case ax::mojom::Role::kComboBoxGrouping:
// No role descripotion.
break;
case ax::mojom::Role::kComboBoxMenuButton:
// No role descripotion.
break;
case ax::mojom::Role::kComplementary:
message_id = IDS_AX_ROLE_COMPLEMENTARY;
break;
case ax::mojom::Role::kContentDeletion:
message_id = IDS_AX_ROLE_CONTENT_DELETION;
break;
case ax::mojom::Role::kContentInsertion:
message_id = IDS_AX_ROLE_CONTENT_INSERTION;
break;
case ax::mojom::Role::kContentInfo:
message_id = IDS_AX_ROLE_CONTENT_INFO;
break;
case ax::mojom::Role::kDate:
message_id = IDS_AX_ROLE_DATE;
break;
case ax::mojom::Role::kDateTime:
message_id = IDS_AX_ROLE_DATE_TIME;
break;
case ax::mojom::Role::kDefinition:
message_id = IDS_AX_ROLE_DEFINITION;
break;
case ax::mojom::Role::kDescriptionListDetail:
message_id = IDS_AX_ROLE_DEFINITION;
break;
case ax::mojom::Role::kDescriptionList:
// No role description.
break;
case ax::mojom::Role::kDescriptionListTerm:
// No role description.
break;
case ax::mojom::Role::kDesktop:
// No role description.
break;
case ax::mojom::Role::kDetails:
// No role description.
break;
case ax::mojom::Role::kDialog:
message_id = IDS_AX_ROLE_DIALOG;
break;
case ax::mojom::Role::kDirectory:
message_id = IDS_AX_ROLE_DIRECTORY;
break;
case ax::mojom::Role::kDisclosureTriangle:
message_id = IDS_AX_ROLE_DISCLOSURE_TRIANGLE;
break;
case ax::mojom::Role::kDocAbstract:
message_id = IDS_AX_ROLE_DOC_ABSTRACT;
break;
case ax::mojom::Role::kDocAcknowledgments:
message_id = IDS_AX_ROLE_DOC_ACKNOWLEDGMENTS;
break;
case ax::mojom::Role::kDocAfterword:
message_id = IDS_AX_ROLE_DOC_AFTERWORD;
break;
case ax::mojom::Role::kDocAppendix:
message_id = IDS_AX_ROLE_DOC_APPENDIX;
break;
case ax::mojom::Role::kDocBackLink:
message_id = IDS_AX_ROLE_DOC_BACKLINK;
break;
case ax::mojom::Role::kDocBiblioEntry:
message_id = IDS_AX_ROLE_DOC_BIBLIO_ENTRY;
break;
case ax::mojom::Role::kDocBibliography:
message_id = IDS_AX_ROLE_DOC_BIBLIOGRAPHY;
break;
case ax::mojom::Role::kDocBiblioRef:
message_id = IDS_AX_ROLE_DOC_BIBLIO_REF;
break;
case ax::mojom::Role::kDocChapter:
message_id = IDS_AX_ROLE_DOC_CHAPTER;
break;
case ax::mojom::Role::kDocColophon:
message_id = IDS_AX_ROLE_DOC_COLOPHON;
break;
case ax::mojom::Role::kDocConclusion:
message_id = IDS_AX_ROLE_DOC_CONCLUSION;
break;
case ax::mojom::Role::kDocCover:
message_id = IDS_AX_ROLE_DOC_COVER;
break;
case ax::mojom::Role::kDocCredit:
message_id = IDS_AX_ROLE_DOC_CREDIT;
break;
case ax::mojom::Role::kDocCredits:
message_id = IDS_AX_ROLE_DOC_CREDITS;
break;
case ax::mojom::Role::kDocDedication:
message_id = IDS_AX_ROLE_DOC_DEDICATION;
break;
case ax::mojom::Role::kDocEndnote:
message_id = IDS_AX_ROLE_DOC_ENDNOTE;
break;
case ax::mojom::Role::kDocEndnotes:
message_id = IDS_AX_ROLE_DOC_ENDNOTES;
break;
case ax::mojom::Role::kDocEpigraph:
message_id = IDS_AX_ROLE_DOC_EPIGRAPH;
break;
case ax::mojom::Role::kDocEpilogue:
message_id = IDS_AX_ROLE_DOC_EPILOGUE;
break;
case ax::mojom::Role::kDocErrata:
message_id = IDS_AX_ROLE_DOC_ERRATA;
break;
case ax::mojom::Role::kDocExample:
message_id = IDS_AX_ROLE_DOC_EXAMPLE;
break;
case ax::mojom::Role::kDocFootnote:
message_id = IDS_AX_ROLE_DOC_FOOTNOTE;
break;
case ax::mojom::Role::kDocForeword:
message_id = IDS_AX_ROLE_DOC_FOREWORD;
break;
case ax::mojom::Role::kDocGlossary:
message_id = IDS_AX_ROLE_DOC_GLOSSARY;
break;
case ax::mojom::Role::kDocGlossRef:
message_id = IDS_AX_ROLE_DOC_GLOSS_REF;
break;
case ax::mojom::Role::kDocIndex:
message_id = IDS_AX_ROLE_DOC_INDEX;
break;
case ax::mojom::Role::kDocIntroduction:
message_id = IDS_AX_ROLE_DOC_INTRODUCTION;
break;
case ax::mojom::Role::kDocNoteRef:
message_id = IDS_AX_ROLE_DOC_NOTE_REF;
break;
case ax::mojom::Role::kDocNotice:
message_id = IDS_AX_ROLE_DOC_NOTICE;
break;
case ax::mojom::Role::kDocPageBreak:
message_id = IDS_AX_ROLE_DOC_PAGE_BREAK;
break;
case ax::mojom::Role::kDocPageList:
message_id = IDS_AX_ROLE_DOC_PAGE_LIST;
break;
case ax::mojom::Role::kDocPart:
message_id = IDS_AX_ROLE_DOC_PART;
break;
case ax::mojom::Role::kDocPreface:
message_id = IDS_AX_ROLE_DOC_PREFACE;
break;
case ax::mojom::Role::kDocPrologue:
message_id = IDS_AX_ROLE_DOC_PROLOGUE;
break;
case ax::mojom::Role::kDocPullquote:
message_id = IDS_AX_ROLE_DOC_PULLQUOTE;
break;
case ax::mojom::Role::kDocQna:
message_id = IDS_AX_ROLE_DOC_QNA;
break;
case ax::mojom::Role::kDocSubtitle:
message_id = IDS_AX_ROLE_DOC_SUBTITLE;
break;
case ax::mojom::Role::kDocTip:
message_id = IDS_AX_ROLE_DOC_TIP;
break;
case ax::mojom::Role::kDocToc:
message_id = IDS_AX_ROLE_DOC_TOC;
break;
case ax::mojom::Role::kDocument:
message_id = IDS_AX_ROLE_DOCUMENT;
break;
case ax::mojom::Role::kEmbeddedObject:
message_id = IDS_AX_ROLE_EMBEDDED_OBJECT;
break;
case ax::mojom::Role::kFeed:
message_id = IDS_AX_ROLE_FEED;
break;
case ax::mojom::Role::kFigcaption:
// No role description.
break;
case ax::mojom::Role::kFigure:
message_id = IDS_AX_ROLE_GRAPHIC;
break;
case ax::mojom::Role::kFooter:
message_id = IDS_AX_ROLE_FOOTER;
break;
case ax::mojom::Role::kForm:
// No role description.
break;
case ax::mojom::Role::kGenericContainer:
// No role description.
break;
case ax::mojom::Role::kGraphicsDocument:
message_id = IDS_AX_ROLE_GRAPHICS_DOCUMENT;
break;
case ax::mojom::Role::kGraphicsObject:
message_id = IDS_AX_ROLE_GRAPHICS_OBJECT;
break;
case ax::mojom::Role::kGraphicsSymbol:
message_id = IDS_AX_ROLE_GRAPHICS_SYMBOL;
break;
case ax::mojom::Role::kGrid:
message_id = IDS_AX_ROLE_TABLE;
break;
case ax::mojom::Role::kGroup:
// No role description.
break;
case ax::mojom::Role::kHeading:
// Note that code above this switch statement handles headings with
// a level, returning a string like "heading level 1", etc.
message_id = IDS_AX_ROLE_HEADING;
break;
case ax::mojom::Role::kIframe:
// No role description.
break;
case ax::mojom::Role::kIframePresentational:
// No role description.
break;
case ax::mojom::Role::kIgnored:
// No role description.
break;
case ax::mojom::Role::kImageMap:
message_id = IDS_AX_ROLE_GRAPHIC;
break;
case ax::mojom::Role::kImage:
message_id = IDS_AX_ROLE_GRAPHIC;
break;
case ax::mojom::Role::kInlineTextBox:
// No role description.
break;
case ax::mojom::Role::kInputTime:
message_id = IDS_AX_ROLE_INPUT_TIME;
break;
case ax::mojom::Role::kKeyboard:
// No role description.
break;
case ax::mojom::Role::kLabelText:
// No role description.
break;
case ax::mojom::Role::kLayoutTable:
case ax::mojom::Role::kLayoutTableCell:
case ax::mojom::Role::kLayoutTableColumn:
case ax::mojom::Role::kLayoutTableRow:
// No role description.
break;
case ax::mojom::Role::kLegend:
// No role description.
break;
case ax::mojom::Role::kLineBreak:
// No role description.
break;
case ax::mojom::Role::kLink:
message_id = IDS_AX_ROLE_LINK;
break;
case ax::mojom::Role::kList:
// No role description.
break;
case ax::mojom::Role::kListBox:
message_id = IDS_AX_ROLE_LIST_BOX;
break;
case ax::mojom::Role::kListBoxOption:
// No role description.
break;
case ax::mojom::Role::kListGrid:
message_id = IDS_AX_ROLE_TABLE;
break;
case ax::mojom::Role::kListItem:
// No role description.
break;
case ax::mojom::Role::kListMarker:
// No role description.
break;
case ax::mojom::Role::kLog:
message_id = IDS_AX_ROLE_LOG;
break;
case ax::mojom::Role::kMain:
message_id = IDS_AX_ROLE_MAIN_CONTENT;
break;
case ax::mojom::Role::kMark:
message_id = IDS_AX_ROLE_MARK;
break;
case ax::mojom::Role::kMarquee:
message_id = IDS_AX_ROLE_MARQUEE;
break;
case ax::mojom::Role::kMath:
message_id = IDS_AX_ROLE_MATH;
break;
case ax::mojom::Role::kMenu:
message_id = IDS_AX_ROLE_MENU;
break;
case ax::mojom::Role::kMenuBar:
message_id = IDS_AX_ROLE_MENU_BAR;
break;
case ax::mojom::Role::kMenuButton:
message_id = IDS_AX_ROLE_MENU_BUTTON;
break;
case ax::mojom::Role::kMenuItem:
message_id = IDS_AX_ROLE_MENU_ITEM;
break;
case ax::mojom::Role::kMenuItemCheckBox:
message_id = IDS_AX_ROLE_CHECK_BOX;
break;
case ax::mojom::Role::kMenuItemRadio:
message_id = IDS_AX_ROLE_RADIO;
break;
case ax::mojom::Role::kMenuListOption:
// No role description.
break;
case ax::mojom::Role::kMenuListPopup:
// No role description.
break;
case ax::mojom::Role::kMeter:
message_id = IDS_AX_ROLE_METER;
break;
case ax::mojom::Role::kNavigation:
message_id = IDS_AX_ROLE_NAVIGATIONAL_LINK;
break;
case ax::mojom::Role::kNote:
message_id = IDS_AX_ROLE_NOTE;
break;
case ax::mojom::Role::kPane:
// No role description.
break;
case ax::mojom::Role::kParagraph:
// No role description.
break;
case ax::mojom::Role::kPopUpButton:
message_id = IDS_AX_ROLE_POP_UP_BUTTON;
break;
case ax::mojom::Role::kPre:
// No role description.
break;
case ax::mojom::Role::kPresentational:
// No role description.
break;
case ax::mojom::Role::kProgressIndicator:
message_id = IDS_AX_ROLE_PROGRESS_INDICATOR;
break;
case ax::mojom::Role::kRadioButton:
message_id = IDS_AX_ROLE_RADIO;
break;
case ax::mojom::Role::kRadioGroup:
message_id = IDS_AX_ROLE_RADIO_GROUP;
break;
case ax::mojom::Role::kRegion:
message_id = IDS_AX_ROLE_REGION;
break;
case ax::mojom::Role::kRootWebArea:
// No role description.
break;
case ax::mojom::Role::kRowHeader:
message_id = IDS_AX_ROLE_ROW_HEADER;
break;
case ax::mojom::Role::kRow:
// No role description.
break;
case ax::mojom::Role::kRuby:
// No role description.
break;
case ax::mojom::Role::kSvgRoot:
message_id = IDS_AX_ROLE_GRAPHIC;
break;
case ax::mojom::Role::kScrollBar:
message_id = IDS_AX_ROLE_SCROLL_BAR;
break;
case ax::mojom::Role::kScrollView:
// No role description.
break;
case ax::mojom::Role::kSearch:
message_id = IDS_AX_ROLE_SEARCH;
break;
case ax::mojom::Role::kSearchBox:
message_id = IDS_AX_ROLE_SEARCH_BOX;
break;
case ax::mojom::Role::kSlider:
message_id = IDS_AX_ROLE_SLIDER;
break;
case ax::mojom::Role::kSliderThumb:
// No role description.
break;
case ax::mojom::Role::kSpinButton:
message_id = IDS_AX_ROLE_SPIN_BUTTON;
break;
case ax::mojom::Role::kSplitter:
message_id = IDS_AX_ROLE_SPLITTER;
break;
case ax::mojom::Role::kStaticText:
// No role description.
break;
case ax::mojom::Role::kStatus:
message_id = IDS_AX_ROLE_STATUS;
break;
case ax::mojom::Role::kSwitch:
message_id = IDS_AX_ROLE_SWITCH;
break;
case ax::mojom::Role::kTabList:
message_id = IDS_AX_ROLE_TAB_LIST;
break;
case ax::mojom::Role::kTabPanel:
message_id = IDS_AX_ROLE_TAB_PANEL;
break;
case ax::mojom::Role::kTab:
message_id = IDS_AX_ROLE_TAB;
break;
case ax::mojom::Role::kTableHeaderContainer:
// No role description.
break;
case ax::mojom::Role::kTable:
message_id = IDS_AX_ROLE_TABLE;
break;
case ax::mojom::Role::kTerm:
message_id = IDS_AX_ROLE_DESCRIPTION_TERM;
break;
case ax::mojom::Role::kTextField:
// No role description.
break;
case ax::mojom::Role::kTextFieldWithComboBox:
// No role description.
break;
case ax::mojom::Role::kTime:
message_id = IDS_AX_ROLE_TIME;
break;
case ax::mojom::Role::kTimer:
message_id = IDS_AX_ROLE_TIMER;
break;
case ax::mojom::Role::kTitleBar:
// No role description.
break;
case ax::mojom::Role::kToggleButton:
message_id = IDS_AX_ROLE_TOGGLE_BUTTON;
break;
case ax::mojom::Role::kToolbar:
message_id = IDS_AX_ROLE_TOOLBAR;
break;
case ax::mojom::Role::kTreeGrid:
message_id = IDS_AX_ROLE_TREE_GRID;
break;
case ax::mojom::Role::kTreeItem:
message_id = IDS_AX_ROLE_TREE_ITEM;
break;
case ax::mojom::Role::kTree:
message_id = IDS_AX_ROLE_TREE;
break;
case ax::mojom::Role::kUnknown:
// No role description.
break;
case ax::mojom::Role::kTooltip:
message_id = IDS_AX_ROLE_TOOLTIP;
break;
case ax::mojom::Role::kVideo:
message_id = IDS_AX_MEDIA_VIDEO_ELEMENT;
break;
case ax::mojom::Role::kWebArea:
// No role description.
break;
case ax::mojom::Role::kWebView:
// No role description.
break;
case ax::mojom::Role::kWindow:
// No role description.
break;
case ax::mojom::Role::kNone:
// No role description.
break;
}
if (message_id != -1)
return content_client->GetLocalizedString(message_id);
return base::string16();
}
int BrowserAccessibilityAndroid::GetItemIndex() const {
int index = 0;
if (IsRangeType()) {
// Return a percentage here for live feedback in an AccessibilityEvent.
// The exact value is returned in RangeCurrentValue.
float min = GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange);
float max = GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange);
float value = GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange);
if (max > min && value >= min && value <= max)
index = static_cast<int>(((value - min)) * 100 / (max - min));
} else {
switch (GetRole()) {
case ax::mojom::Role::kListItem:
case ax::mojom::Role::kListBoxOption:
case ax::mojom::Role::kTreeItem:
index = node()->GetPosInSet() - 1;
break;
default:
break;
}
}
return index;
}
int BrowserAccessibilityAndroid::GetItemCount() const {
int count = 0;
if (IsRangeType()) {
// An AccessibilityEvent can only return integer information about a
// seek control, so we return a percentage. The real range is returned
// in RangeMin and RangeMax.
count = 100;
} else {
switch (GetRole()) {
case ax::mojom::Role::kList:
case ax::mojom::Role::kListBox:
case ax::mojom::Role::kDescriptionList:
count = node()->GetSetSize();
break;
default:
break;
}
}
return count;
}
bool BrowserAccessibilityAndroid::CanScrollForward() const {
if (IsSlider()) {
float value = GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange);
float max = GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange);
return value < max;
} else {
return GetScrollX() < GetMaxScrollX() ||
GetScrollY() < GetMaxScrollY();
}
}
bool BrowserAccessibilityAndroid::CanScrollBackward() const {
if (IsSlider()) {
float value = GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange);
float min = GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange);
return value > min;
} else {
return GetScrollX() > GetMinScrollX() ||
GetScrollY() > GetMinScrollY();
}
}
bool BrowserAccessibilityAndroid::CanScrollUp() const {
return GetScrollY() > GetMinScrollY();
}
bool BrowserAccessibilityAndroid::CanScrollDown() const {
return GetScrollY() < GetMaxScrollY();
}
bool BrowserAccessibilityAndroid::CanScrollLeft() const {
return GetScrollX() > GetMinScrollX();
}
bool BrowserAccessibilityAndroid::CanScrollRight() const {
return GetScrollX() < GetMaxScrollX();
}
int BrowserAccessibilityAndroid::GetScrollX() const {
int value = 0;
GetIntAttribute(ax::mojom::IntAttribute::kScrollX, &value);
return value;
}
int BrowserAccessibilityAndroid::GetScrollY() const {
int value = 0;
GetIntAttribute(ax::mojom::IntAttribute::kScrollY, &value);
return value;
}
int BrowserAccessibilityAndroid::GetMinScrollX() const {
return GetIntAttribute(ax::mojom::IntAttribute::kScrollXMin);
}
int BrowserAccessibilityAndroid::GetMinScrollY() const {
return GetIntAttribute(ax::mojom::IntAttribute::kScrollYMin);
}
int BrowserAccessibilityAndroid::GetMaxScrollX() const {
return GetIntAttribute(ax::mojom::IntAttribute::kScrollXMax);
}
int BrowserAccessibilityAndroid::GetMaxScrollY() const {
return GetIntAttribute(ax::mojom::IntAttribute::kScrollYMax);
}
bool BrowserAccessibilityAndroid::Scroll(int direction) const {
int x_initial = GetIntAttribute(ax::mojom::IntAttribute::kScrollX);
int x_min = GetIntAttribute(ax::mojom::IntAttribute::kScrollXMin);
int x_max = GetIntAttribute(ax::mojom::IntAttribute::kScrollXMax);
int y_initial = GetIntAttribute(ax::mojom::IntAttribute::kScrollY);
int y_min = GetIntAttribute(ax::mojom::IntAttribute::kScrollYMin);
int y_max = GetIntAttribute(ax::mojom::IntAttribute::kScrollYMax);
// Figure out the bounding box of the visible portion of this scrollable
// view so we know how much to scroll by.
gfx::Rect bounds;
if (GetRole() == ax::mojom::Role::kRootWebArea && !PlatformGetParent()) {
// If this is the root web area, use the bounds of the view to determine
// how big one page is.
if (!manager()->delegate())
return false;
bounds = manager()->delegate()->AccessibilityGetViewBounds();
} else if (GetRole() == ax::mojom::Role::kRootWebArea &&
PlatformGetParent()) {
// If this is a web area inside of an iframe, try to use the bounds of
// the containing element.
BrowserAccessibility* parent = PlatformGetParent();
while (parent && (parent->GetPageBoundsRect().width() == 0 ||
parent->GetPageBoundsRect().height() == 0)) {
parent = parent->PlatformGetParent();
}
if (parent)
bounds = parent->GetPageBoundsRect();
else
bounds = GetPageBoundsRect();
} else {
// Otherwise this is something like a scrollable div, just use the
// bounds of this object itself.
bounds = GetPageBoundsRect();
}
// Scroll by 80% of one page.
int page_x = std::max(bounds.width() * 4 / 5, 1);
int page_y = std::max(bounds.height() * 4 / 5, 1);
if (direction == FORWARD)
direction = y_max > y_min ? DOWN : RIGHT;
if (direction == BACKWARD)
direction = y_max > y_min ? UP : LEFT;
int x = x_initial;
int y = y_initial;
switch (direction) {
case UP:
if (y_initial == y_min)
return false;
y = std::min(std::max(y_initial - page_y, y_min), y_max);
break;
case DOWN:
if (y_initial == y_max)
return false;
y = std::min(std::max(y_initial + page_y, y_min), y_max);
break;
case LEFT:
if (x_initial == x_min)
return false;
x = std::min(std::max(x_initial - page_x, x_min), x_max);
break;
case RIGHT:
if (x_initial == x_max)
return false;
x = std::min(std::max(x_initial + page_x, x_min), x_max);
break;
default:
NOTREACHED();
}
manager()->SetScrollOffset(*this, gfx::Point(x, y));
return true;
}
// Given arbitrary old_value_ and new_value_, we must come up with reasonable
// edit metrics. Although edits like "apple" > "apples" are typical, anything
// is possible, such as "apple" > "applesauce", "apple" > "boot", or "" >
// "supercalifragilisticexpialidocious". So we consider old_value_ to be of the
// form AXB and new_value_ to be of the form AYB, where X and Y are the pieces
// that don't match. We take the X to be the "removed" characters and Y to be
// the "added" characters.
int BrowserAccessibilityAndroid::GetTextChangeFromIndex() const {
// This is len(A)
return CommonPrefixLength(old_value_, new_value_);
}
int BrowserAccessibilityAndroid::GetTextChangeAddedCount() const {
// This is len(AYB) - (len(A) + len(B)), or len(Y), the added characters.
return new_value_.length() - CommonEndLengths(old_value_, new_value_);
}
int BrowserAccessibilityAndroid::GetTextChangeRemovedCount() const {
// This is len(AXB) - (len(A) + len(B)), or len(X), the removed characters.
return old_value_.length() - CommonEndLengths(old_value_, new_value_);
}
// static
size_t BrowserAccessibilityAndroid::CommonPrefixLength(
const base::string16 a,
const base::string16 b) {
size_t a_len = a.length();
size_t b_len = b.length();
size_t i = 0;
while (i < a_len &&
i < b_len &&
a[i] == b[i]) {
i++;
}
return i;
}
// static
size_t BrowserAccessibilityAndroid::CommonSuffixLength(
const base::string16 a,
const base::string16 b) {
size_t a_len = a.length();
size_t b_len = b.length();
size_t i = 0;
while (i < a_len &&
i < b_len &&
a[a_len - i - 1] == b[b_len - i - 1]) {
i++;
}
return i;
}
// TODO(nektar): Merge this function with
// |BrowserAccessibilityCocoa::computeTextEdit|.
//
// static
size_t BrowserAccessibilityAndroid::CommonEndLengths(
const base::string16 a,
const base::string16 b) {
size_t prefix_len = CommonPrefixLength(a, b);
// Remove the matching prefix before finding the suffix. Otherwise, if
// old_value_ is "a" and new_value_ is "aa", "a" will be double-counted as
// both a prefix and a suffix of "aa".
base::string16 a_body = a.substr(prefix_len, std::string::npos);
base::string16 b_body = b.substr(prefix_len, std::string::npos);
size_t suffix_len = CommonSuffixLength(a_body, b_body);
return prefix_len + suffix_len;
}
base::string16 BrowserAccessibilityAndroid::GetTextChangeBeforeText() const {
return old_value_;
}
int BrowserAccessibilityAndroid::GetSelectionStart() const {
int sel_start = 0;
GetIntAttribute(ax::mojom::IntAttribute::kTextSelStart, &sel_start);
return sel_start;
}
int BrowserAccessibilityAndroid::GetSelectionEnd() const {
int sel_end = 0;
GetIntAttribute(ax::mojom::IntAttribute::kTextSelEnd, &sel_end);
return sel_end;
}
int BrowserAccessibilityAndroid::GetEditableTextLength() const {
base::string16 value = GetValue();
return value.length();
}
int BrowserAccessibilityAndroid::AndroidInputType() const {
std::string html_tag =
GetStringAttribute(ax::mojom::StringAttribute::kHtmlTag);
if (html_tag != "input")
return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
std::string type;
if (!GetHtmlAttribute("type", &type))
return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
if (type.empty() || type == "text" || type == "search")
return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
else if (type == "date")
return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
else if (type == "datetime" || type == "datetime-local")
return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
else if (type == "email")
return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL;
else if (type == "month")
return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
else if (type == "number")
return ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER;
else if (type == "password")
return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD;
else if (type == "tel")
return ANDROID_TEXT_INPUTTYPE_TYPE_PHONE;
else if (type == "time")
return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME;
else if (type == "url")
return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI;
else if (type == "week")
return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
}
int BrowserAccessibilityAndroid::AndroidLiveRegionType() const {
std::string live =
GetStringAttribute(ax::mojom::StringAttribute::kLiveStatus);
if (live == "polite")
return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE;
else if (live == "assertive")
return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE;
return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE;
}
int BrowserAccessibilityAndroid::AndroidRangeType() const {
return ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT;
}
int BrowserAccessibilityAndroid::RowCount() const {
if (ui::IsTableLike(GetRole()))
return node()->GetTableRowCount();
if (GetRole() == ax::mojom::Role::kList ||
GetRole() == ax::mojom::Role::kListBox ||
GetRole() == ax::mojom::Role::kDescriptionList ||
GetRole() == ax::mojom::Role::kTree) {
return node()->GetSetSize();
}
return 0;
}
int BrowserAccessibilityAndroid::ColumnCount() const {
if (ui::IsTableLike(GetRole()))
return node()->GetTableColCount();
return 0;
}
int BrowserAccessibilityAndroid::RowIndex() const {
if (GetRole() == ax::mojom::Role::kListItem ||
GetRole() == ax::mojom::Role::kListBoxOption ||
GetRole() == ax::mojom::Role::kTreeItem) {
return node()->GetPosInSet() - 1;
}
return node()->GetTableCellRowIndex();
}
int BrowserAccessibilityAndroid::RowSpan() const {
return node()->GetTableCellRowSpan();
}
int BrowserAccessibilityAndroid::ColumnIndex() const {
return node()->GetTableCellColIndex();
}
int BrowserAccessibilityAndroid::ColumnSpan() const {
return node()->GetTableCellColSpan();
}
float BrowserAccessibilityAndroid::RangeMin() const {
return GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange);
}
float BrowserAccessibilityAndroid::RangeMax() const {
return GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange);
}
float BrowserAccessibilityAndroid::RangeCurrentValue() const {
return GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange);
}
void BrowserAccessibilityAndroid::GetGranularityBoundaries(
int granularity,
std::vector<int32_t>* starts,
std::vector<int32_t>* ends,
int offset) {
switch (granularity) {
case ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_LINE:
GetLineBoundaries(starts, ends, offset);
break;
case ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_WORD:
GetWordBoundaries(starts, ends, offset);
break;
default:
NOTREACHED();
}
}
void BrowserAccessibilityAndroid::GetLineBoundaries(
std::vector<int32_t>* line_starts,
std::vector<int32_t>* line_ends,
int offset) {
// If this node has no children, treat it as all one line.
if (GetText().size() > 0 && !InternalChildCount()) {
line_starts->push_back(offset);
line_ends->push_back(offset + GetText().size());
}
// If this is a static text node, get the line boundaries from the
// inline text boxes if possible.
if (GetRole() == ax::mojom::Role::kStaticText) {
int last_y = 0;
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibilityAndroid* child =
static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
CHECK_EQ(ax::mojom::Role::kInlineTextBox, child->GetRole());
// TODO(dmazzoni): replace this with a proper API to determine
// if two inline text boxes are on the same line. http://crbug.com/421771
int y = child->GetPageBoundsRect().y();
if (i == 0) {
line_starts->push_back(offset);
} else if (y != last_y) {
line_ends->push_back(offset);
line_starts->push_back(offset);
}
offset += child->GetText().size();
last_y = y;
}
line_ends->push_back(offset);
return;
}
// Otherwise, call GetLineBoundaries recursively on the children.
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibilityAndroid* child =
static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
child->GetLineBoundaries(line_starts, line_ends, offset);
offset += child->GetText().size();
}
}
void BrowserAccessibilityAndroid::GetWordBoundaries(
std::vector<int32_t>* word_starts,
std::vector<int32_t>* word_ends,
int offset) {
if (GetRole() == ax::mojom::Role::kInlineTextBox) {
const std::vector<int32_t>& starts =
GetIntListAttribute(ax::mojom::IntListAttribute::kWordStarts);
const std::vector<int32_t>& ends =
GetIntListAttribute(ax::mojom::IntListAttribute::kWordEnds);
for (size_t i = 0; i < starts.size(); ++i) {
word_starts->push_back(offset + starts[i]);
word_ends->push_back(offset + ends[i]);
}
return;
}
base::string16 concatenated_text;
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibilityAndroid* child =
static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
base::string16 child_text = child->GetText();
concatenated_text += child->GetText();
}
base::string16 text = GetText();
if (text.empty() || concatenated_text == text) {
// Great - this node is just the concatenation of its children, so
// we can get the word boundaries recursively.
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibilityAndroid* child =
static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
child->GetWordBoundaries(word_starts, word_ends, offset);
offset += child->GetText().size();
}
} else {
// This node has its own accessible text that doesn't match its
// visible text - like alt text for an image or something with an
// aria-label, so split the text into words locally.
base::i18n::BreakIterator iter(text, base::i18n::BreakIterator::BREAK_WORD);
if (!iter.Init())
return;
while (iter.Advance()) {
if (iter.IsWord()) {
word_starts->push_back(iter.prev());
word_ends->push_back(iter.pos());
}
}
}
}
bool BrowserAccessibilityAndroid::HasFocusableNonOptionChild() const {
// This is called from PlatformIsLeaf, so don't call PlatformChildCount
// from within this!
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
if (child->HasState(ax::mojom::State::kFocusable) &&
child->GetRole() != ax::mojom::Role::kMenuListOption)
return true;
if (static_cast<BrowserAccessibilityAndroid*>(child)
->HasFocusableNonOptionChild())
return true;
}
return false;
}
bool BrowserAccessibilityAndroid::HasNonEmptyValue() const {
return IsEditableText() && !GetValue().empty();
}
bool BrowserAccessibilityAndroid::HasCharacterLocations() const {
if (GetRole() == ax::mojom::Role::kStaticText)
return true;
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
if (static_cast<BrowserAccessibilityAndroid*>(child)
->HasCharacterLocations())
return true;
}
return false;
}
bool BrowserAccessibilityAndroid::HasImage() const {
if (ui::IsImage(GetRole()))
return true;
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
if (static_cast<BrowserAccessibilityAndroid*>(child)->HasImage())
return true;
}
return false;
}
bool BrowserAccessibilityAndroid::HasOnlyTextChildren() const {
// This is called from PlatformIsLeaf, so don't call PlatformChildCount
// from within this!
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
if (!child->IsTextOnlyObject())
return false;
}
return true;
}
bool BrowserAccessibilityAndroid::HasOnlyTextAndImageChildren() const {
// This is called from PlatformIsLeaf, so don't call PlatformChildCount
// from within this!
for (uint32_t i = 0; i < InternalChildCount(); i++) {
BrowserAccessibility* child = InternalGetChild(i);
if (child->GetRole() != ax::mojom::Role::kStaticText &&
!ui::IsImage(child->GetRole())) {
return false;
}
}
return true;
}
bool BrowserAccessibilityAndroid::IsIframe() const {
return (GetRole() == ax::mojom::Role::kIframe ||
GetRole() == ax::mojom::Role::kIframePresentational);
}
bool BrowserAccessibilityAndroid::ShouldExposeValueAsName() const {
switch (GetRole()) {
case ax::mojom::Role::kTextField:
case ax::mojom::Role::kTextFieldWithComboBox:
return true;
default:
break;
}
if (HasState(ax::mojom::State::kEditable))
return true;
base::string16 value = GetValue();
if (value.empty())
return false;
if (GetRole() == ax::mojom::Role::kPopUpButton)
return true;
return false;
}
void BrowserAccessibilityAndroid::OnDataChanged() {
BrowserAccessibility::OnDataChanged();
if (IsEditableText()) {
base::string16 value = GetValue();
if (value != new_value_) {
old_value_ = new_value_;
new_value_ = value;
}
}
}
int BrowserAccessibilityAndroid::CountChildrenWithRole(
ax::mojom::Role role) const {
int count = 0;
for (uint32_t i = 0; i < PlatformChildCount(); i++) {
if (PlatformGetChild(i)->GetRole() == role)
count++;
}
return count;
}
} // namespace content