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chromium / chromium / src / 598c3e9b0e32c0e11debfa2d2da79586c5576a59 / . / content / browser / accessibility / browser_accessibility_win.cc
blob: a5501590560641bc29135659cfbbcbfaa15b6bdb [file] [log] [blame]
// Copyright (c) 2012 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_win.h"
#include <UIAutomationClient.h>
#include <UIAutomationCoreApi.h>
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/enum_variant.h"
#include "base/win/scoped_comptr.h"
#include "base/win/windows_version.h"
#include "content/browser/accessibility/browser_accessibility_manager_win.h"
#include "content/browser/accessibility/browser_accessibility_state_impl.h"
#include "content/common/accessibility_messages.h"
#include "content/public/common/content_client.h"
#include "ui/accessibility/ax_text_utils.h"
#include "ui/base/win/accessibility_ids_win.h"
#include "ui/base/win/accessibility_misc_utils.h"
#include "ui/base/win/atl_module.h"
namespace content {
// These nonstandard GUIDs are taken directly from the Mozilla sources
// (accessible/src/msaa/nsAccessNodeWrap.cpp); some documentation is here:
// http://developer.mozilla.org/en/Accessibility/AT-APIs/ImplementationFeatures/MSAA
const GUID GUID_ISimpleDOM = {
0x0c539790, 0x12e4, 0x11cf,
0xb6, 0x61, 0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8};
const GUID GUID_IAccessibleContentDocument = {
0xa5d8e1f3, 0x3571, 0x4d8f,
0x95, 0x21, 0x07, 0xed, 0x28, 0xfb, 0x07, 0x2e};
const base::char16 BrowserAccessibilityWin::kEmbeddedCharacter = L'\xfffc';
// static
LONG BrowserAccessibilityWin::next_unique_id_win_ =
base::win::kFirstBrowserAccessibilityManagerAccessibilityId;
//
// BrowserAccessibilityRelation
//
// A simple implementation of IAccessibleRelation, used to represent
// a relationship between two accessible nodes in the tree.
//
class BrowserAccessibilityRelation
: public CComObjectRootEx<CComMultiThreadModel>,
public IAccessibleRelation {
BEGIN_COM_MAP(BrowserAccessibilityRelation)
COM_INTERFACE_ENTRY(IAccessibleRelation)
END_COM_MAP()
CONTENT_EXPORT BrowserAccessibilityRelation() {}
CONTENT_EXPORT virtual ~BrowserAccessibilityRelation() {}
CONTENT_EXPORT void Initialize(BrowserAccessibilityWin* owner,
const base::string16& type);
CONTENT_EXPORT void AddTarget(int target_id);
// IAccessibleRelation methods.
CONTENT_EXPORT STDMETHODIMP get_relationType(BSTR* relation_type);
CONTENT_EXPORT STDMETHODIMP get_nTargets(long* n_targets);
CONTENT_EXPORT STDMETHODIMP get_target(long target_index, IUnknown** target);
CONTENT_EXPORT STDMETHODIMP get_targets(long max_targets,
IUnknown** targets,
long* n_targets);
// IAccessibleRelation methods not implemented.
CONTENT_EXPORT STDMETHODIMP get_localizedRelationType(BSTR* relation_type) {
return E_NOTIMPL;
}
private:
base::string16 type_;
base::win::ScopedComPtr<BrowserAccessibilityWin> owner_;
std::vector<int> target_ids_;
};
void BrowserAccessibilityRelation::Initialize(BrowserAccessibilityWin* owner,
const base::string16& type) {
owner_ = owner;
type_ = type;
}
void BrowserAccessibilityRelation::AddTarget(int target_id) {
target_ids_.push_back(target_id);
}
STDMETHODIMP BrowserAccessibilityRelation::get_relationType(
BSTR* relation_type) {
if (!relation_type)
return E_INVALIDARG;
if (!owner_->instance_active())
return E_FAIL;
*relation_type = SysAllocString(type_.c_str());
DCHECK(*relation_type);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityRelation::get_nTargets(long* n_targets) {
if (!n_targets)
return E_INVALIDARG;
if (!owner_->instance_active())
return E_FAIL;
*n_targets = static_cast<long>(target_ids_.size());
BrowserAccessibilityManager* manager = owner_->manager();
for (long i = *n_targets - 1; i >= 0; --i) {
BrowserAccessibility* result = manager->GetFromID(target_ids_[i]);
if (!result || !result->instance_active()) {
*n_targets = 0;
break;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityRelation::get_target(long target_index,
IUnknown** target) {
if (!target)
return E_INVALIDARG;
if (!owner_->instance_active())
return E_FAIL;
if (target_index < 0 ||
target_index >= static_cast<long>(target_ids_.size())) {
return E_INVALIDARG;
}
BrowserAccessibilityManager* manager = owner_->manager();
BrowserAccessibility* result =
manager->GetFromID(target_ids_[target_index]);
if (!result || !result->instance_active())
return E_FAIL;
*target = static_cast<IAccessible*>(
result->ToBrowserAccessibilityWin()->NewReference());
return S_OK;
}
STDMETHODIMP BrowserAccessibilityRelation::get_targets(long max_targets,
IUnknown** targets,
long* n_targets) {
if (!targets || !n_targets)
return E_INVALIDARG;
if (!owner_->instance_active())
return E_FAIL;
long count = static_cast<long>(target_ids_.size());
if (count > max_targets)
count = max_targets;
*n_targets = count;
if (count == 0)
return S_FALSE;
for (long i = 0; i < count; ++i) {
HRESULT result = get_target(i, &targets[i]);
if (result != S_OK)
return result;
}
return S_OK;
}
//
// BrowserAccessibilityWin::WinAttributes
//
BrowserAccessibilityWin::WinAttributes::WinAttributes()
: ia_role(0),
ia_state(0),
ia2_role(0),
ia2_state(0) {
}
//
// BrowserAccessibilityWin
//
// static
BrowserAccessibility* BrowserAccessibility::Create() {
ui::win::CreateATLModuleIfNeeded();
CComObject<BrowserAccessibilityWin>* instance;
HRESULT hr = CComObject<BrowserAccessibilityWin>::CreateInstance(&instance);
DCHECK(SUCCEEDED(hr));
return instance->NewReference();
}
BrowserAccessibilityWin* BrowserAccessibility::ToBrowserAccessibilityWin() {
return static_cast<BrowserAccessibilityWin*>(this);
}
BrowserAccessibilityWin::BrowserAccessibilityWin()
: win_attributes_(new WinAttributes()),
previous_scroll_x_(0),
previous_scroll_y_(0) {
// Start unique IDs at -1 and decrement each time, because get_accChild
// uses positive IDs to enumerate children, so we use negative IDs to
// clearly distinguish between indices and unique IDs.
unique_id_win_ = next_unique_id_win_;
if (next_unique_id_win_ ==
base::win::kLastBrowserAccessibilityManagerAccessibilityId) {
next_unique_id_win_ =
base::win::kFirstBrowserAccessibilityManagerAccessibilityId;
}
next_unique_id_win_--;
}
BrowserAccessibilityWin::~BrowserAccessibilityWin() {
for (size_t i = 0; i < relations_.size(); ++i)
relations_[i]->Release();
}
//
// IAccessible methods.
//
// Conventions:
// * Always test for instance_active() first and return E_FAIL if it's false.
// * Always check for invalid arguments first, even if they're unused.
// * Return S_FALSE if the only output is a string argument and it's empty.
//
HRESULT BrowserAccessibilityWin::accDoDefaultAction(VARIANT var_id) {
if (!instance_active())
return E_FAIL;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
manager()->DoDefaultAction(*target);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::accHitTest(LONG x_left,
LONG y_top,
VARIANT* child) {
if (!instance_active())
return E_FAIL;
if (!child)
return E_INVALIDARG;
gfx::Point point(x_left, y_top);
if (!GetGlobalBoundsRect().Contains(point)) {
// Return S_FALSE and VT_EMPTY when the outside the object's boundaries.
child->vt = VT_EMPTY;
return S_FALSE;
}
BrowserAccessibility* result = BrowserAccessibilityForPoint(point);
if (result == this) {
// Point is within this object.
child->vt = VT_I4;
child->lVal = CHILDID_SELF;
} else {
child->vt = VT_DISPATCH;
child->pdispVal = result->ToBrowserAccessibilityWin()->NewReference();
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::accLocation(LONG* x_left,
LONG* y_top,
LONG* width,
LONG* height,
VARIANT var_id) {
if (!instance_active())
return E_FAIL;
if (!x_left || !y_top || !width || !height)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
gfx::Rect bounds = target->GetGlobalBoundsRect();
*x_left = bounds.x();
*y_top = bounds.y();
*width = bounds.width();
*height = bounds.height();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::accNavigate(LONG nav_dir,
VARIANT start,
VARIANT* end) {
BrowserAccessibilityWin* target = GetTargetFromChildID(start);
if (!target)
return E_INVALIDARG;
if ((nav_dir == NAVDIR_LASTCHILD || nav_dir == NAVDIR_FIRSTCHILD) &&
start.lVal != CHILDID_SELF) {
// MSAA states that navigating to first/last child can only be from self.
return E_INVALIDARG;
}
uint32 child_count = target->PlatformChildCount();
BrowserAccessibility* result = NULL;
switch (nav_dir) {
case NAVDIR_DOWN:
case NAVDIR_UP:
case NAVDIR_LEFT:
case NAVDIR_RIGHT:
// These directions are not implemented, matching Mozilla and IE.
return E_NOTIMPL;
case NAVDIR_FIRSTCHILD:
if (child_count > 0)
result = target->PlatformGetChild(0);
break;
case NAVDIR_LASTCHILD:
if (child_count > 0)
result = target->PlatformGetChild(child_count - 1);
break;
case NAVDIR_NEXT:
result = target->GetNextSibling();
break;
case NAVDIR_PREVIOUS:
result = target->GetPreviousSibling();
break;
}
if (!result) {
end->vt = VT_EMPTY;
return S_FALSE;
}
end->vt = VT_DISPATCH;
end->pdispVal = result->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accChild(VARIANT var_child,
IDispatch** disp_child) {
if (!instance_active())
return E_FAIL;
if (!disp_child)
return E_INVALIDARG;
*disp_child = NULL;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_child);
if (!target)
return E_INVALIDARG;
(*disp_child) = target->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accChildCount(LONG* child_count) {
if (!instance_active())
return E_FAIL;
if (!child_count)
return E_INVALIDARG;
*child_count = PlatformChildCount();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accDefaultAction(VARIANT var_id,
BSTR* def_action) {
if (!instance_active())
return E_FAIL;
if (!def_action)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
return target->GetStringAttributeAsBstr(
ui::AX_ATTR_ACTION, def_action);
}
STDMETHODIMP BrowserAccessibilityWin::get_accDescription(VARIANT var_id,
BSTR* desc) {
if (!instance_active())
return E_FAIL;
if (!desc)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
base::string16 description_str = target->description();
if (description_str.empty())
return S_FALSE;
*desc = SysAllocString(description_str.c_str());
DCHECK(*desc);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accFocus(VARIANT* focus_child) {
if (!instance_active())
return E_FAIL;
if (!focus_child)
return E_INVALIDARG;
BrowserAccessibilityWin* focus = static_cast<BrowserAccessibilityWin*>(
manager()->GetFocus(this));
if (focus == this) {
focus_child->vt = VT_I4;
focus_child->lVal = CHILDID_SELF;
} else if (focus == NULL) {
focus_child->vt = VT_EMPTY;
} else {
focus_child->vt = VT_DISPATCH;
focus_child->pdispVal = focus->NewReference();
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accHelp(VARIANT var_id, BSTR* help) {
if (!instance_active())
return E_FAIL;
if (!help)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
base::string16 help_str = target->help();
if (help_str.empty())
return S_FALSE;
*help = SysAllocString(help_str.c_str());
DCHECK(*help);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accKeyboardShortcut(VARIANT var_id,
BSTR* acc_key) {
if (!instance_active())
return E_FAIL;
if (!acc_key)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
return target->GetStringAttributeAsBstr(
ui::AX_ATTR_SHORTCUT, acc_key);
}
STDMETHODIMP BrowserAccessibilityWin::get_accName(VARIANT var_id, BSTR* name) {
if (!instance_active())
return E_FAIL;
if (!name)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
base::string16 name_str = target->name();
// If the name is empty, see if it's labeled by another element.
if (name_str.empty()) {
int title_elem_id;
if (target->GetIntAttribute(ui::AX_ATTR_TITLE_UI_ELEMENT,
&title_elem_id)) {
BrowserAccessibilityWin* title_elem =
manager()->GetFromID(title_elem_id)->ToBrowserAccessibilityWin();
if (title_elem)
name_str = title_elem->GetNameRecursive();
}
}
if (name_str.empty())
return S_FALSE;
*name = SysAllocString(name_str.c_str());
DCHECK(*name);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accParent(IDispatch** disp_parent) {
if (!instance_active())
return E_FAIL;
if (!disp_parent)
return E_INVALIDARG;
IAccessible* parent_obj = GetParent()->ToBrowserAccessibilityWin();
if (parent_obj == NULL) {
// This happens if we're the root of the tree;
// return the IAccessible for the window.
parent_obj =
manager()->ToBrowserAccessibilityManagerWin()->GetParentIAccessible();
// |parent| can only be NULL if the manager was created before the parent
// IAccessible was known and it wasn't subsequently set before a client
// requested it. This has been fixed. |parent| may also be NULL during
// destruction. Possible cases where this could occur include tabs being
// dragged to a new window, etc.
if (!parent_obj) {
DVLOG(1) << "In Function: "
<< __FUNCTION__
<< ". Parent IAccessible interface is NULL. Returning failure";
return E_FAIL;
}
}
parent_obj->AddRef();
*disp_parent = parent_obj;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accRole(VARIANT var_id,
VARIANT* role) {
if (!instance_active())
return E_FAIL;
if (!role)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
if (!target->role_name().empty()) {
role->vt = VT_BSTR;
role->bstrVal = SysAllocString(target->role_name().c_str());
} else {
role->vt = VT_I4;
role->lVal = target->ia_role();
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accState(VARIANT var_id,
VARIANT* state) {
if (!instance_active())
return E_FAIL;
if (!state)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
state->vt = VT_I4;
state->lVal = target->ia_state();
if (manager()->GetFocus(NULL) == this)
state->lVal |= STATE_SYSTEM_FOCUSED;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accValue(VARIANT var_id,
BSTR* value) {
if (!instance_active())
return E_FAIL;
if (!value)
return E_INVALIDARG;
BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
if (!target)
return E_INVALIDARG;
if (target->ia_role() == ROLE_SYSTEM_PROGRESSBAR ||
target->ia_role() == ROLE_SYSTEM_SCROLLBAR ||
target->ia_role() == ROLE_SYSTEM_SLIDER) {
base::string16 value_text = target->GetValueText();
*value = SysAllocString(value_text.c_str());
DCHECK(*value);
return S_OK;
}
// Expose color well value.
if (target->ia2_role() == IA2_ROLE_COLOR_CHOOSER) {
int r = target->GetIntAttribute(
ui::AX_ATTR_COLOR_VALUE_RED);
int g = target->GetIntAttribute(
ui::AX_ATTR_COLOR_VALUE_GREEN);
int b = target->GetIntAttribute(
ui::AX_ATTR_COLOR_VALUE_BLUE);
base::string16 value_text;
value_text = base::IntToString16((r * 100) / 255) + L"% red " +
base::IntToString16((g * 100) / 255) + L"% green " +
base::IntToString16((b * 100) / 255) + L"% blue";
*value = SysAllocString(value_text.c_str());
DCHECK(*value);
return S_OK;
}
*value = SysAllocString(target->value().c_str());
DCHECK(*value);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_accHelpTopic(BSTR* help_file,
VARIANT var_id,
LONG* topic_id) {
return E_NOTIMPL;
}
STDMETHODIMP BrowserAccessibilityWin::get_accSelection(VARIANT* selected) {
if (!instance_active())
return E_FAIL;
if (GetRole() != ui::AX_ROLE_LIST_BOX)
return E_NOTIMPL;
unsigned long selected_count = 0;
for (size_t i = 0; i < InternalChildCount(); ++i) {
if (InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED))
++selected_count;
}
if (selected_count == 0) {
selected->vt = VT_EMPTY;
return S_OK;
}
if (selected_count == 1) {
for (size_t i = 0; i < InternalChildCount(); ++i) {
if (InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED)) {
selected->vt = VT_DISPATCH;
selected->pdispVal =
InternalGetChild(i)->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
}
}
// Multiple items are selected.
base::win::EnumVariant* enum_variant =
new base::win::EnumVariant(selected_count);
enum_variant->AddRef();
unsigned long index = 0;
for (size_t i = 0; i < InternalChildCount(); ++i) {
if (InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED)) {
enum_variant->ItemAt(index)->vt = VT_DISPATCH;
enum_variant->ItemAt(index)->pdispVal =
InternalGetChild(i)->ToBrowserAccessibilityWin()->NewReference();
++index;
}
}
selected->vt = VT_UNKNOWN;
selected->punkVal = static_cast<IUnknown*>(
static_cast<base::win::IUnknownImpl*>(enum_variant));
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::accSelect(
LONG flags_sel, VARIANT var_id) {
if (!instance_active())
return E_FAIL;
if (flags_sel & SELFLAG_TAKEFOCUS) {
manager()->SetFocus(this, true);
return S_OK;
}
return S_FALSE;
}
//
// IAccessible2 methods.
//
STDMETHODIMP BrowserAccessibilityWin::role(LONG* role) {
if (!instance_active())
return E_FAIL;
if (!role)
return E_INVALIDARG;
*role = ia2_role();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_attributes(BSTR* attributes) {
if (!instance_active())
return E_FAIL;
if (!attributes)
return E_INVALIDARG;
// The iaccessible2 attributes are a set of key-value pairs
// separated by semicolons, with a colon between the key and the value.
base::string16 str;
const std::vector<base::string16>& attributes_list = ia2_attributes();
for (unsigned int i = 0; i < attributes_list.size(); ++i) {
str += attributes_list[i] + L';';
}
if (str.empty())
return S_FALSE;
*attributes = SysAllocString(str.c_str());
DCHECK(*attributes);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_states(AccessibleStates* states) {
if (!instance_active())
return E_FAIL;
if (!states)
return E_INVALIDARG;
*states = ia2_state();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_uniqueID(LONG* unique_id) {
if (!instance_active())
return E_FAIL;
if (!unique_id)
return E_INVALIDARG;
*unique_id = unique_id_win_;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_windowHandle(HWND* window_handle) {
if (!instance_active())
return E_FAIL;
if (!window_handle)
return E_INVALIDARG;
*window_handle =
manager()->ToBrowserAccessibilityManagerWin()->GetParentHWND();
if (!*window_handle)
return E_FAIL;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_indexInParent(LONG* index_in_parent) {
if (!instance_active())
return E_FAIL;
if (!index_in_parent)
return E_INVALIDARG;
*index_in_parent = this->GetIndexInParent();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nRelations(LONG* n_relations) {
if (!instance_active())
return E_FAIL;
if (!n_relations)
return E_INVALIDARG;
*n_relations = relations_.size();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_relation(
LONG relation_index,
IAccessibleRelation** relation) {
if (!instance_active())
return E_FAIL;
if (relation_index < 0 ||
relation_index >= static_cast<long>(relations_.size())) {
return E_INVALIDARG;
}
if (!relation)
return E_INVALIDARG;
relations_[relation_index]->AddRef();
*relation = relations_[relation_index];
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_relations(
LONG max_relations,
IAccessibleRelation** relations,
LONG* n_relations) {
if (!instance_active())
return E_FAIL;
if (!relations || !n_relations)
return E_INVALIDARG;
long count = static_cast<long>(relations_.size());
*n_relations = count;
if (count == 0)
return S_FALSE;
for (long i = 0; i < count; ++i) {
relations_[i]->AddRef();
relations[i] = relations_[i];
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::scrollTo(enum IA2ScrollType scroll_type) {
if (!instance_active())
return E_FAIL;
gfx::Rect r = GetLocation();
switch(scroll_type) {
case IA2_SCROLL_TYPE_TOP_LEFT:
manager()->ScrollToMakeVisible(*this, gfx::Rect(r.x(), r.y(), 0, 0));
break;
case IA2_SCROLL_TYPE_BOTTOM_RIGHT:
manager()->ScrollToMakeVisible(
*this, gfx::Rect(r.right(), r.bottom(), 0, 0));
break;
case IA2_SCROLL_TYPE_TOP_EDGE:
manager()->ScrollToMakeVisible(
*this, gfx::Rect(r.x(), r.y(), r.width(), 0));
break;
case IA2_SCROLL_TYPE_BOTTOM_EDGE:
manager()->ScrollToMakeVisible(
*this, gfx::Rect(r.x(), r.bottom(), r.width(), 0));
break;
case IA2_SCROLL_TYPE_LEFT_EDGE:
manager()->ScrollToMakeVisible(
*this, gfx::Rect(r.x(), r.y(), 0, r.height()));
break;
case IA2_SCROLL_TYPE_RIGHT_EDGE:
manager()->ScrollToMakeVisible(
*this, gfx::Rect(r.right(), r.y(), 0, r.height()));
break;
case IA2_SCROLL_TYPE_ANYWHERE:
default:
manager()->ScrollToMakeVisible(*this, r);
break;
}
manager()->ToBrowserAccessibilityManagerWin()->TrackScrollingObject(this);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::scrollToPoint(
enum IA2CoordinateType coordinate_type,
LONG x,
LONG y) {
if (!instance_active())
return E_FAIL;
gfx::Point scroll_to(x, y);
if (coordinate_type == IA2_COORDTYPE_SCREEN_RELATIVE) {
scroll_to -= manager()->GetViewBounds().OffsetFromOrigin();
} else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) {
if (GetParent())
scroll_to += GetParent()->GetLocation().OffsetFromOrigin();
} else {
return E_INVALIDARG;
}
manager()->ScrollToPoint(*this, scroll_to);
manager()->ToBrowserAccessibilityManagerWin()->TrackScrollingObject(this);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_groupPosition(
LONG* group_level,
LONG* similar_items_in_group,
LONG* position_in_group) {
if (!instance_active())
return E_FAIL;
if (!group_level || !similar_items_in_group || !position_in_group)
return E_INVALIDARG;
if (GetRole() == ui::AX_ROLE_LIST_BOX_OPTION &&
GetParent() &&
GetParent()->GetRole() == ui::AX_ROLE_LIST_BOX) {
*group_level = 0;
*similar_items_in_group = GetParent()->PlatformChildCount();
*position_in_group = GetIndexInParent() + 1;
return S_OK;
}
return E_NOTIMPL;
}
//
// IAccessibleApplication methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_appName(BSTR* app_name) {
// No need to check |instance_active()| because this interface is
// global, and doesn't depend on any local state.
if (!app_name)
return E_INVALIDARG;
// GetProduct() returns a string like "Chrome/aa.bb.cc.dd", split out
// the part before the "/".
std::vector<std::string> product_components;
base::SplitString(GetContentClient()->GetProduct(), '/', &product_components);
DCHECK_EQ(2U, product_components.size());
if (product_components.size() != 2)
return E_FAIL;
*app_name = SysAllocString(base::UTF8ToUTF16(product_components[0]).c_str());
DCHECK(*app_name);
return *app_name ? S_OK : E_FAIL;
}
STDMETHODIMP BrowserAccessibilityWin::get_appVersion(BSTR* app_version) {
// No need to check |instance_active()| because this interface is
// global, and doesn't depend on any local state.
if (!app_version)
return E_INVALIDARG;
// GetProduct() returns a string like "Chrome/aa.bb.cc.dd", split out
// the part after the "/".
std::vector<std::string> product_components;
base::SplitString(GetContentClient()->GetProduct(), '/', &product_components);
DCHECK_EQ(2U, product_components.size());
if (product_components.size() != 2)
return E_FAIL;
*app_version =
SysAllocString(base::UTF8ToUTF16(product_components[1]).c_str());
DCHECK(*app_version);
return *app_version ? S_OK : E_FAIL;
}
STDMETHODIMP BrowserAccessibilityWin::get_toolkitName(BSTR* toolkit_name) {
// No need to check |instance_active()| because this interface is
// global, and doesn't depend on any local state.
if (!toolkit_name)
return E_INVALIDARG;
// This is hard-coded; all products based on the Chromium engine
// will have the same toolkit name, so that assistive technology can
// detect any Chrome-based product.
*toolkit_name = SysAllocString(L"Chrome");
DCHECK(*toolkit_name);
return *toolkit_name ? S_OK : E_FAIL;
}
STDMETHODIMP BrowserAccessibilityWin::get_toolkitVersion(
BSTR* toolkit_version) {
// No need to check |instance_active()| because this interface is
// global, and doesn't depend on any local state.
if (!toolkit_version)
return E_INVALIDARG;
std::string user_agent = GetContentClient()->GetUserAgent();
*toolkit_version = SysAllocString(base::UTF8ToUTF16(user_agent).c_str());
DCHECK(*toolkit_version);
return *toolkit_version ? S_OK : E_FAIL;
}
//
// IAccessibleImage methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_description(BSTR* desc) {
if (!instance_active())
return E_FAIL;
if (!desc)
return E_INVALIDARG;
if (description().empty())
return S_FALSE;
*desc = SysAllocString(description().c_str());
DCHECK(*desc);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_imagePosition(
enum IA2CoordinateType coordinate_type,
LONG* x,
LONG* y) {
if (!instance_active())
return E_FAIL;
if (!x || !y)
return E_INVALIDARG;
if (coordinate_type == IA2_COORDTYPE_SCREEN_RELATIVE) {
HWND parent_hwnd =
manager()->ToBrowserAccessibilityManagerWin()->GetParentHWND();
if (!parent_hwnd)
return E_FAIL;
POINT top_left = {0, 0};
::ClientToScreen(parent_hwnd, &top_left);
*x = GetLocation().x() + top_left.x;
*y = GetLocation().y() + top_left.y;
} else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) {
*x = GetLocation().x();
*y = GetLocation().y();
if (GetParent()) {
*x -= GetParent()->GetLocation().x();
*y -= GetParent()->GetLocation().y();
}
} else {
return E_INVALIDARG;
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_imageSize(LONG* height, LONG* width) {
if (!instance_active())
return E_FAIL;
if (!height || !width)
return E_INVALIDARG;
*height = GetLocation().height();
*width = GetLocation().width();
return S_OK;
}
//
// IAccessibleTable methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_accessibleAt(
long row,
long column,
IUnknown** accessible) {
if (!instance_active())
return E_FAIL;
if (!accessible)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(
ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (row < 0 || row >= rows || column < 0 || column >= columns)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
DCHECK_EQ(columns * rows, static_cast<int>(cell_ids.size()));
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell = GetFromID(cell_id);
if (cell) {
*accessible = static_cast<IAccessible*>(cell->NewReference());
return S_OK;
}
*accessible = NULL;
return E_INVALIDARG;
}
STDMETHODIMP BrowserAccessibilityWin::get_caption(IUnknown** accessible) {
if (!instance_active())
return E_FAIL;
if (!accessible)
return E_INVALIDARG;
// TODO(dmazzoni): implement
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_childIndex(long row,
long column,
long* cell_index) {
if (!instance_active())
return E_FAIL;
if (!cell_index)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(
ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (row < 0 || row >= rows || column < 0 || column >= columns)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
const std::vector<int32>& unique_cell_ids = GetIntListAttribute(
ui::AX_ATTR_UNIQUE_CELL_IDS);
DCHECK_EQ(columns * rows, static_cast<int>(cell_ids.size()));
int cell_id = cell_ids[row * columns + column];
for (size_t i = 0; i < unique_cell_ids.size(); ++i) {
if (unique_cell_ids[i] == cell_id) {
*cell_index = (long)i;
return S_OK;
}
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnDescription(long column,
BSTR* description) {
if (!instance_active())
return E_FAIL;
if (!description)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (column < 0 || column >= columns)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
for (int i = 0; i < rows; ++i) {
int cell_id = cell_ids[i * columns + column];
BrowserAccessibilityWin* cell = static_cast<BrowserAccessibilityWin*>(
manager()->GetFromID(cell_id));
if (cell && cell->GetRole() == ui::AX_ROLE_COLUMN_HEADER) {
base::string16 cell_name = cell->GetString16Attribute(
ui::AX_ATTR_NAME);
if (cell_name.size() > 0) {
*description = SysAllocString(cell_name.c_str());
return S_OK;
}
if (cell->description().size() > 0) {
*description = SysAllocString(cell->description().c_str());
return S_OK;
}
}
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnExtentAt(
long row,
long column,
long* n_columns_spanned) {
if (!instance_active())
return E_FAIL;
if (!n_columns_spanned)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (row < 0 || row >= rows || column < 0 || column >= columns)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell = static_cast<BrowserAccessibilityWin*>(
manager()->GetFromID(cell_id));
int colspan;
if (cell &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN, &colspan) &&
colspan >= 1) {
*n_columns_spanned = colspan;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnHeader(
IAccessibleTable** accessible_table,
long* starting_row_index) {
// TODO(dmazzoni): implement
return E_NOTIMPL;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnIndex(long cell_index,
long* column_index) {
if (!instance_active())
return E_FAIL;
if (!column_index)
return E_INVALIDARG;
const std::vector<int32>& unique_cell_ids = GetIntListAttribute(
ui::AX_ATTR_UNIQUE_CELL_IDS);
int cell_id_count = static_cast<int>(unique_cell_ids.size());
if (cell_index < 0)
return E_INVALIDARG;
if (cell_index >= cell_id_count)
return S_FALSE;
int cell_id = unique_cell_ids[cell_index];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
int col_index;
if (cell &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX, &col_index)) {
*column_index = col_index;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_nColumns(long* column_count) {
if (!instance_active())
return E_FAIL;
if (!column_count)
return E_INVALIDARG;
int columns;
if (GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns)) {
*column_count = columns;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_nRows(long* row_count) {
if (!instance_active())
return E_FAIL;
if (!row_count)
return E_INVALIDARG;
int rows;
if (GetIntAttribute(ui::AX_ATTR_TABLE_ROW_COUNT, &rows)) {
*row_count = rows;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_nSelectedChildren(long* cell_count) {
if (!instance_active())
return E_FAIL;
if (!cell_count)
return E_INVALIDARG;
// TODO(dmazzoni): add support for selected cells/rows/columns in tables.
*cell_count = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nSelectedColumns(long* column_count) {
if (!instance_active())
return E_FAIL;
if (!column_count)
return E_INVALIDARG;
*column_count = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nSelectedRows(long* row_count) {
if (!instance_active())
return E_FAIL;
if (!row_count)
return E_INVALIDARG;
*row_count = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowDescription(long row,
BSTR* description) {
if (!instance_active())
return E_FAIL;
if (!description)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (row < 0 || row >= rows)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
for (int i = 0; i < columns; ++i) {
int cell_id = cell_ids[row * columns + i];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
if (cell && cell->GetRole() == ui::AX_ROLE_ROW_HEADER) {
base::string16 cell_name = cell->GetString16Attribute(
ui::AX_ATTR_NAME);
if (cell_name.size() > 0) {
*description = SysAllocString(cell_name.c_str());
return S_OK;
}
if (cell->description().size() > 0) {
*description = SysAllocString(cell->description().c_str());
return S_OK;
}
}
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowExtentAt(long row,
long column,
long* n_rows_spanned) {
if (!instance_active())
return E_FAIL;
if (!n_rows_spanned)
return E_INVALIDARG;
int columns;
int rows;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(ui::AX_ATTR_TABLE_ROW_COUNT, &rows) ||
columns <= 0 ||
rows <= 0) {
return S_FALSE;
}
if (row < 0 || row >= rows || column < 0 || column >= columns)
return E_INVALIDARG;
const std::vector<int32>& cell_ids = GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
int rowspan;
if (cell &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
rowspan >= 1) {
*n_rows_spanned = rowspan;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowHeader(
IAccessibleTable** accessible_table,
long* starting_column_index) {
// TODO(dmazzoni): implement
return E_NOTIMPL;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowIndex(long cell_index,
long* row_index) {
if (!instance_active())
return E_FAIL;
if (!row_index)
return E_INVALIDARG;
const std::vector<int32>& unique_cell_ids = GetIntListAttribute(
ui::AX_ATTR_UNIQUE_CELL_IDS);
int cell_id_count = static_cast<int>(unique_cell_ids.size());
if (cell_index < 0)
return E_INVALIDARG;
if (cell_index >= cell_id_count)
return S_FALSE;
int cell_id = unique_cell_ids[cell_index];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
int cell_row_index;
if (cell &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_INDEX, &cell_row_index)) {
*row_index = cell_row_index;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedChildren(long max_children,
long** children,
long* n_children) {
if (!instance_active())
return E_FAIL;
if (!children || !n_children)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_children = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedColumns(long max_columns,
long** columns,
long* n_columns) {
if (!instance_active())
return E_FAIL;
if (!columns || !n_columns)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_columns = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedRows(long max_rows,
long** rows,
long* n_rows) {
if (!instance_active())
return E_FAIL;
if (!rows || !n_rows)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_rows = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_summary(IUnknown** accessible) {
if (!instance_active())
return E_FAIL;
if (!accessible)
return E_INVALIDARG;
// TODO(dmazzoni): implement
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_isColumnSelected(
long column,
boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!is_selected)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*is_selected = false;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_isRowSelected(long row,
boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!is_selected)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*is_selected = false;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_isSelected(long row,
long column,
boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!is_selected)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*is_selected = false;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowColumnExtentsAtIndex(
long index,
long* row,
long* column,
long* row_extents,
long* column_extents,
boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!row || !column || !row_extents || !column_extents || !is_selected)
return E_INVALIDARG;
const std::vector<int32>& unique_cell_ids = GetIntListAttribute(
ui::AX_ATTR_UNIQUE_CELL_IDS);
int cell_id_count = static_cast<int>(unique_cell_ids.size());
if (index < 0)
return E_INVALIDARG;
if (index >= cell_id_count)
return S_FALSE;
int cell_id = unique_cell_ids[index];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
int rowspan;
int colspan;
if (cell &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
cell->GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN, &colspan) &&
rowspan >= 1 &&
colspan >= 1) {
*row_extents = rowspan;
*column_extents = colspan;
return S_OK;
}
return S_FALSE;
}
//
// IAccessibleTable2 methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_cellAt(long row,
long column,
IUnknown** cell) {
return get_accessibleAt(row, column, cell);
}
STDMETHODIMP BrowserAccessibilityWin::get_nSelectedCells(long* cell_count) {
return get_nSelectedChildren(cell_count);
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedCells(
IUnknown*** cells,
long* n_selected_cells) {
if (!instance_active())
return E_FAIL;
if (!cells || !n_selected_cells)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_selected_cells = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedColumns(long** columns,
long* n_columns) {
if (!instance_active())
return E_FAIL;
if (!columns || !n_columns)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_columns = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_selectedRows(long** rows,
long* n_rows) {
if (!instance_active())
return E_FAIL;
if (!rows || !n_rows)
return E_INVALIDARG;
// TODO(dmazzoni): Implement this.
*n_rows = 0;
return S_OK;
}
//
// IAccessibleTableCell methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_columnExtent(
long* n_columns_spanned) {
if (!instance_active())
return E_FAIL;
if (!n_columns_spanned)
return E_INVALIDARG;
int colspan;
if (GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN, &colspan) &&
colspan >= 1) {
*n_columns_spanned = colspan;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnHeaderCells(
IUnknown*** cell_accessibles,
long* n_column_header_cells) {
if (!instance_active())
return E_FAIL;
if (!cell_accessibles || !n_column_header_cells)
return E_INVALIDARG;
*n_column_header_cells = 0;
int column;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX, &column)) {
return S_FALSE;
}
BrowserAccessibility* table = GetParent();
while (table && table->GetRole() != ui::AX_ROLE_TABLE)
table = table->GetParent();
if (!table) {
NOTREACHED();
return S_FALSE;
}
int columns;
int rows;
if (!table->GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!table->GetIntAttribute(
ui::AX_ATTR_TABLE_ROW_COUNT, &rows)) {
return S_FALSE;
}
if (columns <= 0 || rows <= 0 || column < 0 || column >= columns)
return S_FALSE;
const std::vector<int32>& cell_ids = table->GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
for (int i = 0; i < rows; ++i) {
int cell_id = cell_ids[i * columns + column];
BrowserAccessibilityWin* cell =
manager()->GetFromID(cell_id)->ToBrowserAccessibilityWin();
if (cell && cell->GetRole() == ui::AX_ROLE_COLUMN_HEADER)
(*n_column_header_cells)++;
}
*cell_accessibles = static_cast<IUnknown**>(CoTaskMemAlloc(
(*n_column_header_cells) * sizeof(cell_accessibles[0])));
int index = 0;
for (int i = 0; i < rows; ++i) {
int cell_id = cell_ids[i * columns + column];
BrowserAccessibility* cell = manager()->GetFromID(cell_id);
if (cell && cell->GetRole() == ui::AX_ROLE_COLUMN_HEADER) {
(*cell_accessibles)[index] = static_cast<IAccessible*>(
cell->ToBrowserAccessibilityWin()->NewReference());
++index;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_columnIndex(long* column_index) {
if (!instance_active())
return E_FAIL;
if (!column_index)
return E_INVALIDARG;
int column;
if (GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX, &column)) {
*column_index = column;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowExtent(long* n_rows_spanned) {
if (!instance_active())
return E_FAIL;
if (!n_rows_spanned)
return E_INVALIDARG;
int rowspan;
if (GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
rowspan >= 1) {
*n_rows_spanned = rowspan;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowHeaderCells(
IUnknown*** cell_accessibles,
long* n_row_header_cells) {
if (!instance_active())
return E_FAIL;
if (!cell_accessibles || !n_row_header_cells)
return E_INVALIDARG;
*n_row_header_cells = 0;
int row;
if (!GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_INDEX, &row)) {
return S_FALSE;
}
BrowserAccessibility* table = GetParent();
while (table && table->GetRole() != ui::AX_ROLE_TABLE)
table = table->GetParent();
if (!table) {
NOTREACHED();
return S_FALSE;
}
int columns;
int rows;
if (!table->GetIntAttribute(
ui::AX_ATTR_TABLE_COLUMN_COUNT, &columns) ||
!table->GetIntAttribute(
ui::AX_ATTR_TABLE_ROW_COUNT, &rows)) {
return S_FALSE;
}
if (columns <= 0 || rows <= 0 || row < 0 || row >= rows)
return S_FALSE;
const std::vector<int32>& cell_ids = table->GetIntListAttribute(
ui::AX_ATTR_CELL_IDS);
for (int i = 0; i < columns; ++i) {
int cell_id = cell_ids[row * columns + i];
BrowserAccessibility* cell = manager()->GetFromID(cell_id);
if (cell && cell->GetRole() == ui::AX_ROLE_ROW_HEADER)
(*n_row_header_cells)++;
}
*cell_accessibles = static_cast<IUnknown**>(CoTaskMemAlloc(
(*n_row_header_cells) * sizeof(cell_accessibles[0])));
int index = 0;
for (int i = 0; i < columns; ++i) {
int cell_id = cell_ids[row * columns + i];
BrowserAccessibility* cell = manager()->GetFromID(cell_id);
if (cell && cell->GetRole() == ui::AX_ROLE_ROW_HEADER) {
(*cell_accessibles)[index] = static_cast<IAccessible*>(
cell->ToBrowserAccessibilityWin()->NewReference());
++index;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowIndex(long* row_index) {
if (!instance_active())
return E_FAIL;
if (!row_index)
return E_INVALIDARG;
int row;
if (GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_INDEX, &row)) {
*row_index = row;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_isSelected(boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!is_selected)
return E_INVALIDARG;
*is_selected = false;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_rowColumnExtents(
long* row_index,
long* column_index,
long* row_extents,
long* column_extents,
boolean* is_selected) {
if (!instance_active())
return E_FAIL;
if (!row_index ||
!column_index ||
!row_extents ||
!column_extents ||
!is_selected) {
return E_INVALIDARG;
}
int row;
int column;
int rowspan;
int colspan;
if (GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_INDEX, &row) &&
GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX, &column) &&
GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
GetIntAttribute(
ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN, &colspan)) {
*row_index = row;
*column_index = column;
*row_extents = rowspan;
*column_extents = colspan;
*is_selected = false;
return S_OK;
}
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_table(IUnknown** table) {
if (!instance_active())
return E_FAIL;
if (!table)
return E_INVALIDARG;
int row;
int column;
GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_INDEX, &row);
GetIntAttribute(ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX, &column);
BrowserAccessibility* find_table = GetParent();
while (find_table && find_table->GetRole() != ui::AX_ROLE_TABLE)
find_table = find_table->GetParent();
if (!find_table) {
NOTREACHED();
return S_FALSE;
}
*table = static_cast<IAccessibleTable*>(
find_table->ToBrowserAccessibilityWin()->NewReference());
return S_OK;
}
//
// IAccessibleText methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_nCharacters(LONG* n_characters) {
if (!instance_active())
return E_FAIL;
if (!n_characters)
return E_INVALIDARG;
*n_characters = TextForIAccessibleText().length();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_caretOffset(LONG* offset) {
if (!instance_active())
return E_FAIL;
if (!offset)
return E_INVALIDARG;
*offset = 0;
if (GetRole() == ui::AX_ROLE_TEXT_FIELD ||
GetRole() == ui::AX_ROLE_TEXT_AREA) {
int sel_start = 0;
if (GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START,
&sel_start))
*offset = sel_start;
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_characterExtents(
LONG offset,
enum IA2CoordinateType coordinate_type,
LONG* out_x,
LONG* out_y,
LONG* out_width,
LONG* out_height) {
if (!instance_active())
return E_FAIL;
if (!out_x || !out_y || !out_width || !out_height)
return E_INVALIDARG;
const base::string16& text_str = TextForIAccessibleText();
HandleSpecialTextOffset(text_str, &offset);
if (offset < 0 || offset > static_cast<LONG>(text_str.size()))
return E_INVALIDARG;
gfx::Rect character_bounds;
if (coordinate_type == IA2_COORDTYPE_SCREEN_RELATIVE) {
character_bounds = GetGlobalBoundsForRange(offset, 1);
} else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) {
character_bounds = GetLocalBoundsForRange(offset, 1);
character_bounds -= GetLocation().OffsetFromOrigin();
} else {
return E_INVALIDARG;
}
*out_x = character_bounds.x();
*out_y = character_bounds.y();
*out_width = character_bounds.width();
*out_height = character_bounds.height();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nSelections(LONG* n_selections) {
if (!instance_active())
return E_FAIL;
if (!n_selections)
return E_INVALIDARG;
*n_selections = 0;
if (GetRole() == ui::AX_ROLE_TEXT_FIELD ||
GetRole() == ui::AX_ROLE_TEXT_AREA) {
int sel_start = 0;
int sel_end = 0;
if (GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START,
&sel_start) &&
GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END, &sel_end) &&
sel_start != sel_end)
*n_selections = 1;
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_selection(LONG selection_index,
LONG* start_offset,
LONG* end_offset) {
if (!instance_active())
return E_FAIL;
if (!start_offset || !end_offset || selection_index != 0)
return E_INVALIDARG;
*start_offset = 0;
*end_offset = 0;
if (GetRole() == ui::AX_ROLE_TEXT_FIELD ||
GetRole() == ui::AX_ROLE_TEXT_AREA) {
int sel_start = 0;
int sel_end = 0;
if (GetIntAttribute(
ui::AX_ATTR_TEXT_SEL_START, &sel_start) &&
GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END, &sel_end)) {
*start_offset = sel_start;
*end_offset = sel_end;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_text(LONG start_offset,
LONG end_offset,
BSTR* text) {
if (!instance_active())
return E_FAIL;
if (!text)
return E_INVALIDARG;
const base::string16& text_str = TextForIAccessibleText();
// Handle special text offsets.
HandleSpecialTextOffset(text_str, &start_offset);
HandleSpecialTextOffset(text_str, &end_offset);
// The spec allows the arguments to be reversed.
if (start_offset > end_offset) {
LONG tmp = start_offset;
start_offset = end_offset;
end_offset = tmp;
}
// The spec does not allow the start or end offsets to be out or range;
// we must return an error if so.
LONG len = text_str.length();
if (start_offset < 0)
return E_INVALIDARG;
if (end_offset > len)
return E_INVALIDARG;
base::string16 substr = text_str.substr(start_offset,
end_offset - start_offset);
if (substr.empty())
return S_FALSE;
*text = SysAllocString(substr.c_str());
DCHECK(*text);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_textAtOffset(
LONG offset,
enum IA2TextBoundaryType boundary_type,
LONG* start_offset,
LONG* end_offset,
BSTR* text) {
if (!instance_active())
return E_FAIL;
if (!start_offset || !end_offset || !text)
return E_INVALIDARG;
// The IAccessible2 spec says we don't have to implement the "sentence"
// boundary type, we can just let the screenreader handle it.
if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
*start_offset = 0;
*end_offset = 0;
*text = NULL;
return S_FALSE;
}
const base::string16& text_str = TextForIAccessibleText();
*start_offset = FindBoundary(
text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
*end_offset = FindBoundary(
text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
return get_text(*start_offset, *end_offset, text);
}
STDMETHODIMP BrowserAccessibilityWin::get_textBeforeOffset(
LONG offset,
enum IA2TextBoundaryType boundary_type,
LONG* start_offset,
LONG* end_offset,
BSTR* text) {
if (!instance_active())
return E_FAIL;
if (!start_offset || !end_offset || !text)
return E_INVALIDARG;
// The IAccessible2 spec says we don't have to implement the "sentence"
// boundary type, we can just let the screenreader handle it.
if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
*start_offset = 0;
*end_offset = 0;
*text = NULL;
return S_FALSE;
}
const base::string16& text_str = TextForIAccessibleText();
*start_offset = FindBoundary(
text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
*end_offset = offset;
return get_text(*start_offset, *end_offset, text);
}
STDMETHODIMP BrowserAccessibilityWin::get_textAfterOffset(
LONG offset,
enum IA2TextBoundaryType boundary_type,
LONG* start_offset,
LONG* end_offset,
BSTR* text) {
if (!instance_active())
return E_FAIL;
if (!start_offset || !end_offset || !text)
return E_INVALIDARG;
// The IAccessible2 spec says we don't have to implement the "sentence"
// boundary type, we can just let the screenreader handle it.
if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
*start_offset = 0;
*end_offset = 0;
*text = NULL;
return S_FALSE;
}
const base::string16& text_str = TextForIAccessibleText();
*start_offset = offset;
*end_offset = FindBoundary(
text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
return get_text(*start_offset, *end_offset, text);
}
STDMETHODIMP BrowserAccessibilityWin::get_newText(IA2TextSegment* new_text) {
if (!instance_active())
return E_FAIL;
if (!new_text)
return E_INVALIDARG;
if (!old_win_attributes_)
return E_FAIL;
int start, old_len, new_len;
ComputeHypertextRemovedAndInserted(&start, &old_len, &new_len);
if (new_len == 0)
return E_FAIL;
base::string16 substr = hypertext().substr(start, new_len);
new_text->text = SysAllocString(substr.c_str());
new_text->start = static_cast<long>(start);
new_text->end = static_cast<long>(start + new_len);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_oldText(IA2TextSegment* old_text) {
if (!instance_active())
return E_FAIL;
if (!old_text)
return E_INVALIDARG;
if (!old_win_attributes_)
return E_FAIL;
int start, old_len, new_len;
ComputeHypertextRemovedAndInserted(&start, &old_len, &new_len);
if (old_len == 0)
return E_FAIL;
base::string16 old_hypertext = old_win_attributes_->hypertext;
base::string16 substr = old_hypertext.substr(start, old_len);
old_text->text = SysAllocString(substr.c_str());
old_text->start = static_cast<long>(start);
old_text->end = static_cast<long>(start + old_len);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_offsetAtPoint(
LONG x,
LONG y,
enum IA2CoordinateType coord_type,
LONG* offset) {
if (!instance_active())
return E_FAIL;
if (!offset)
return E_INVALIDARG;
// TODO(dmazzoni): implement this. We're returning S_OK for now so that
// screen readers still return partially accurate results rather than
// completely failing.
*offset = 0;
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::scrollSubstringTo(
LONG start_index,
LONG end_index,
enum IA2ScrollType scroll_type) {
// TODO(dmazzoni): adjust this for the start and end index, too.
return scrollTo(scroll_type);
}
STDMETHODIMP BrowserAccessibilityWin::scrollSubstringToPoint(
LONG start_index,
LONG end_index,
enum IA2CoordinateType coordinate_type,
LONG x, LONG y) {
// TODO(dmazzoni): adjust this for the start and end index, too.
return scrollToPoint(coordinate_type, x, y);
}
STDMETHODIMP BrowserAccessibilityWin::addSelection(LONG start_offset,
LONG end_offset) {
if (!instance_active())
return E_FAIL;
const base::string16& text_str = TextForIAccessibleText();
HandleSpecialTextOffset(text_str, &start_offset);
HandleSpecialTextOffset(text_str, &end_offset);
manager()->SetTextSelection(*this, start_offset, end_offset);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::removeSelection(LONG selection_index) {
if (!instance_active())
return E_FAIL;
if (selection_index != 0)
return E_INVALIDARG;
manager()->SetTextSelection(*this, 0, 0);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::setCaretOffset(LONG offset) {
if (!instance_active())
return E_FAIL;
const base::string16& text_str = TextForIAccessibleText();
HandleSpecialTextOffset(text_str, &offset);
manager()->SetTextSelection(*this, offset, offset);
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::setSelection(LONG selection_index,
LONG start_offset,
LONG end_offset) {
if (!instance_active())
return E_FAIL;
if (selection_index != 0)
return E_INVALIDARG;
const base::string16& text_str = TextForIAccessibleText();
HandleSpecialTextOffset(text_str, &start_offset);
HandleSpecialTextOffset(text_str, &end_offset);
manager()->SetTextSelection(*this, start_offset, end_offset);
return S_OK;
}
//
// IAccessibleHypertext methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_nHyperlinks(long* hyperlink_count) {
if (!instance_active())
return E_FAIL;
if (!hyperlink_count)
return E_INVALIDARG;
*hyperlink_count = hyperlink_offset_to_index().size();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_hyperlink(
long index,
IAccessibleHyperlink** hyperlink) {
if (!instance_active())
return E_FAIL;
if (!hyperlink ||
index < 0 ||
index >= static_cast<long>(hyperlinks().size())) {
return E_INVALIDARG;
}
int32 id = hyperlinks()[index];
BrowserAccessibilityWin* child =
manager()->GetFromID(id)->ToBrowserAccessibilityWin();
if (child) {
*hyperlink = static_cast<IAccessibleHyperlink*>(child->NewReference());
return S_OK;
}
return E_FAIL;
}
STDMETHODIMP BrowserAccessibilityWin::get_hyperlinkIndex(
long char_index,
long* hyperlink_index) {
if (!instance_active())
return E_FAIL;
if (!hyperlink_index)
return E_INVALIDARG;
*hyperlink_index = -1;
if (char_index < 0 ||
char_index >= static_cast<long>(hypertext().size())) {
return E_INVALIDARG;
}
std::map<int32, int32>::iterator it =
hyperlink_offset_to_index().find(char_index);
if (it == hyperlink_offset_to_index().end())
return E_FAIL;
*hyperlink_index = it->second;
return S_OK;
}
//
// IAccessibleValue methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_currentValue(VARIANT* value) {
if (!instance_active())
return E_FAIL;
if (!value)
return E_INVALIDARG;
float float_val;
if (GetFloatAttribute(
ui::AX_ATTR_VALUE_FOR_RANGE, &float_val)) {
value->vt = VT_R8;
value->dblVal = float_val;
return S_OK;
}
value->vt = VT_EMPTY;
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_minimumValue(VARIANT* value) {
if (!instance_active())
return E_FAIL;
if (!value)
return E_INVALIDARG;
float float_val;
if (GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE,
&float_val)) {
value->vt = VT_R8;
value->dblVal = float_val;
return S_OK;
}
value->vt = VT_EMPTY;
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::get_maximumValue(VARIANT* value) {
if (!instance_active())
return E_FAIL;
if (!value)
return E_INVALIDARG;
float float_val;
if (GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE,
&float_val)) {
value->vt = VT_R8;
value->dblVal = float_val;
return S_OK;
}
value->vt = VT_EMPTY;
return S_FALSE;
}
STDMETHODIMP BrowserAccessibilityWin::setCurrentValue(VARIANT new_value) {
// TODO(dmazzoni): Implement this.
return E_NOTIMPL;
}
//
// ISimpleDOMDocument methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_URL(BSTR* url) {
if (!instance_active())
return E_FAIL;
if (!url)
return E_INVALIDARG;
return GetStringAttributeAsBstr(ui::AX_ATTR_DOC_URL, url);
}
STDMETHODIMP BrowserAccessibilityWin::get_title(BSTR* title) {
if (!instance_active())
return E_FAIL;
if (!title)
return E_INVALIDARG;
return GetStringAttributeAsBstr(ui::AX_ATTR_DOC_TITLE, title);
}
STDMETHODIMP BrowserAccessibilityWin::get_mimeType(BSTR* mime_type) {
if (!instance_active())
return E_FAIL;
if (!mime_type)
return E_INVALIDARG;
return GetStringAttributeAsBstr(
ui::AX_ATTR_DOC_MIMETYPE, mime_type);
}
STDMETHODIMP BrowserAccessibilityWin::get_docType(BSTR* doc_type) {
if (!instance_active())
return E_FAIL;
if (!doc_type)
return E_INVALIDARG;
return GetStringAttributeAsBstr(
ui::AX_ATTR_DOC_DOCTYPE, doc_type);
}
//
// ISimpleDOMNode methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_nodeInfo(
BSTR* node_name,
short* name_space_id,
BSTR* node_value,
unsigned int* num_children,
unsigned int* unique_id,
unsigned short* node_type) {
if (!instance_active())
return E_FAIL;
if (!node_name || !name_space_id || !node_value || !num_children ||
!unique_id || !node_type) {
return E_INVALIDARG;
}
base::string16 tag;
if (GetString16Attribute(ui::AX_ATTR_HTML_TAG, &tag))
*node_name = SysAllocString(tag.c_str());
else
*node_name = NULL;
*name_space_id = 0;
*node_value = SysAllocString(value().c_str());
*num_children = PlatformChildCount();
*unique_id = unique_id_win_;
if (ia_role() == ROLE_SYSTEM_DOCUMENT) {
*node_type = NODETYPE_DOCUMENT;
} else if (ia_role() == ROLE_SYSTEM_TEXT &&
((ia2_state() & IA2_STATE_EDITABLE) == 0)) {
*node_type = NODETYPE_TEXT;
} else {
*node_type = NODETYPE_ELEMENT;
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_attributes(
unsigned short max_attribs,
BSTR* attrib_names,
short* name_space_id,
BSTR* attrib_values,
unsigned short* num_attribs) {
if (!instance_active())
return E_FAIL;
if (!attrib_names || !name_space_id || !attrib_values || !num_attribs)
return E_INVALIDARG;
*num_attribs = max_attribs;
if (*num_attribs > GetHtmlAttributes().size())
*num_attribs = GetHtmlAttributes().size();
for (unsigned short i = 0; i < *num_attribs; ++i) {
attrib_names[i] = SysAllocString(
base::UTF8ToUTF16(GetHtmlAttributes()[i].first).c_str());
name_space_id[i] = 0;
attrib_values[i] = SysAllocString(
base::UTF8ToUTF16(GetHtmlAttributes()[i].second).c_str());
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_attributesForNames(
unsigned short num_attribs,
BSTR* attrib_names,
short* name_space_id,
BSTR* attrib_values) {
if (!instance_active())
return E_FAIL;
if (!attrib_names || !name_space_id || !attrib_values)
return E_INVALIDARG;
for (unsigned short i = 0; i < num_attribs; ++i) {
name_space_id[i] = 0;
bool found = false;
std::string name = base::UTF16ToUTF8((LPCWSTR)attrib_names[i]);
for (unsigned int j = 0; j < GetHtmlAttributes().size(); ++j) {
if (GetHtmlAttributes()[j].first == name) {
attrib_values[i] = SysAllocString(
base::UTF8ToUTF16(GetHtmlAttributes()[j].second).c_str());
found = true;
break;
}
}
if (!found) {
attrib_values[i] = NULL;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_computedStyle(
unsigned short max_style_properties,
boolean use_alternate_view,
BSTR* style_properties,
BSTR* style_values,
unsigned short *num_style_properties) {
if (!instance_active())
return E_FAIL;
if (!style_properties || !style_values)
return E_INVALIDARG;
// We only cache a single style property for now: DISPLAY
base::string16 display;
if (max_style_properties == 0 ||
!GetString16Attribute(ui::AX_ATTR_DISPLAY, &display)) {
*num_style_properties = 0;
return S_OK;
}
*num_style_properties = 1;
style_properties[0] = SysAllocString(L"display");
style_values[0] = SysAllocString(display.c_str());
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_computedStyleForProperties(
unsigned short num_style_properties,
boolean use_alternate_view,
BSTR* style_properties,
BSTR* style_values) {
if (!instance_active())
return E_FAIL;
if (!style_properties || !style_values)
return E_INVALIDARG;
// We only cache a single style property for now: DISPLAY
for (unsigned short i = 0; i < num_style_properties; ++i) {
base::string16 name = (LPCWSTR)style_properties[i];
base::StringToLowerASCII(&name);
if (name == L"display") {
base::string16 display = GetString16Attribute(
ui::AX_ATTR_DISPLAY);
style_values[i] = SysAllocString(display.c_str());
} else {
style_values[i] = NULL;
}
}
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::scrollTo(boolean placeTopLeft) {
return scrollTo(placeTopLeft ?
IA2_SCROLL_TYPE_TOP_LEFT : IA2_SCROLL_TYPE_ANYWHERE);
}
STDMETHODIMP BrowserAccessibilityWin::get_parentNode(ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
*node = GetParent()->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_firstChild(ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (PlatformChildCount() == 0) {
*node = NULL;
return S_FALSE;
}
*node = PlatformGetChild(0)->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_lastChild(ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (PlatformChildCount() == 0) {
*node = NULL;
return S_FALSE;
}
*node = PlatformGetChild(PlatformChildCount() - 1)
->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_previousSibling(
ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (!GetParent() || GetIndexInParent() <= 0) {
*node = NULL;
return S_FALSE;
}
*node = GetParent()->InternalGetChild(GetIndexInParent() - 1)->
ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nextSibling(ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (!GetParent() ||
GetIndexInParent() < 0 ||
GetIndexInParent() >= static_cast<int>(
GetParent()->InternalChildCount()) - 1) {
*node = NULL;
return S_FALSE;
}
*node = GetParent()->InternalGetChild(GetIndexInParent() + 1)->
ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_childAt(
unsigned int child_index,
ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (child_index >= PlatformChildCount())
return E_INVALIDARG;
BrowserAccessibility* child = PlatformGetChild(child_index);
if (!child) {
*node = NULL;
return S_FALSE;
}
*node = child->ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
//
// ISimpleDOMText methods.
//
STDMETHODIMP BrowserAccessibilityWin::get_domText(BSTR* dom_text) {
if (!instance_active())
return E_FAIL;
if (!dom_text)
return E_INVALIDARG;
return GetStringAttributeAsBstr(
ui::AX_ATTR_NAME, dom_text);
}
STDMETHODIMP BrowserAccessibilityWin::get_clippedSubstringBounds(
unsigned int start_index,
unsigned int end_index,
int* out_x,
int* out_y,
int* out_width,
int* out_height) {
// TODO(dmazzoni): fully support this API by intersecting the
// rect with the container's rect.
return get_unclippedSubstringBounds(
start_index, end_index, out_x, out_y, out_width, out_height);
}
STDMETHODIMP BrowserAccessibilityWin::get_unclippedSubstringBounds(
unsigned int start_index,
unsigned int end_index,
int* out_x,
int* out_y,
int* out_width,
int* out_height) {
if (!instance_active())
return E_FAIL;
if (!out_x || !out_y || !out_width || !out_height)
return E_INVALIDARG;
const base::string16& text_str = TextForIAccessibleText();
if (start_index > text_str.size() ||
end_index > text_str.size() ||
start_index > end_index) {
return E_INVALIDARG;
}
gfx::Rect bounds = GetGlobalBoundsForRange(
start_index, end_index - start_index);
*out_x = bounds.x();
*out_y = bounds.y();
*out_width = bounds.width();
*out_height = bounds.height();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::scrollToSubstring(
unsigned int start_index,
unsigned int end_index) {
if (!instance_active())
return E_FAIL;
const base::string16& text_str = TextForIAccessibleText();
if (start_index > text_str.size() ||
end_index > text_str.size() ||
start_index > end_index) {
return E_INVALIDARG;
}
manager()->ScrollToMakeVisible(*this, GetLocalBoundsForRange(
start_index, end_index - start_index));
manager()->ToBrowserAccessibilityManagerWin()->TrackScrollingObject(this);
return S_OK;
}
//
// IServiceProvider methods.
//
STDMETHODIMP BrowserAccessibilityWin::QueryService(REFGUID guidService,
REFIID riid,
void** object) {
if (!instance_active())
return E_FAIL;
// The system uses IAccessible APIs for many purposes, but only
// assistive technology like screen readers uses IAccessible2.
// Enable full accessibility support when IAccessible2 APIs are queried.
if (riid == IID_IAccessible2)
BrowserAccessibilityStateImpl::GetInstance()->EnableAccessibility();
if (guidService == GUID_IAccessibleContentDocument) {
// Special Mozilla extension: return the accessible for the root document.
// Screen readers use this to distinguish between a document loaded event
// on the root document vs on an iframe.
return manager()->GetRoot()->ToBrowserAccessibilityWin()->QueryInterface(
IID_IAccessible2, object);
}
if (guidService == IID_IAccessible ||
guidService == IID_IAccessible2 ||
guidService == IID_IAccessibleAction ||
guidService == IID_IAccessibleApplication ||
guidService == IID_IAccessibleHyperlink ||
guidService == IID_IAccessibleHypertext ||
guidService == IID_IAccessibleImage ||
guidService == IID_IAccessibleTable ||
guidService == IID_IAccessibleTable2 ||
guidService == IID_IAccessibleTableCell ||
guidService == IID_IAccessibleText ||
guidService == IID_IAccessibleValue ||
guidService == IID_ISimpleDOMDocument ||
guidService == IID_ISimpleDOMNode ||
guidService == IID_ISimpleDOMText ||
guidService == GUID_ISimpleDOM) {
return QueryInterface(riid, object);
}
// We only support the IAccessibleEx interface on Windows 8 and above. This
// is needed for the on-screen Keyboard to show up in metro mode, when the
// user taps an editable portion on the page.
// All methods in the IAccessibleEx interface are unimplemented.
if (riid == IID_IAccessibleEx &&
base::win::GetVersion() >= base::win::VERSION_WIN8) {
return QueryInterface(riid, object);
}
*object = NULL;
return E_FAIL;
}
STDMETHODIMP BrowserAccessibilityWin::GetPatternProvider(PATTERNID id,
IUnknown** provider) {
DVLOG(1) << "In Function: "
<< __FUNCTION__
<< " for pattern id: "
<< id;
if (id == UIA_ValuePatternId || id == UIA_TextPatternId) {
if (IsEditableText()) {
DVLOG(1) << "Returning UIA text provider";
base::win::UIATextProvider::CreateTextProvider(
GetValueText(), true, provider);
return S_OK;
}
}
return E_NOTIMPL;
}
STDMETHODIMP BrowserAccessibilityWin::GetPropertyValue(PROPERTYID id,
VARIANT* ret) {
DVLOG(1) << "In Function: "
<< __FUNCTION__
<< " for property id: "
<< id;
V_VT(ret) = VT_EMPTY;
if (id == UIA_ControlTypePropertyId) {
if (IsEditableText()) {
V_VT(ret) = VT_I4;
ret->lVal = UIA_EditControlTypeId;
DVLOG(1) << "Returning Edit control type";
} else {
DVLOG(1) << "Returning empty control type";
}
}
return S_OK;
}
//
// CComObjectRootEx methods.
//
// static
HRESULT WINAPI BrowserAccessibilityWin::InternalQueryInterface(
void* this_ptr,
const _ATL_INTMAP_ENTRY* entries,
REFIID iid,
void** object) {
BrowserAccessibilityWin* accessibility =
reinterpret_cast<BrowserAccessibilityWin*>(this_ptr);
int32 ia_role = accessibility->ia_role();
if (iid == IID_IAccessibleImage) {
if (ia_role != ROLE_SYSTEM_GRAPHIC) {
*object = NULL;
return E_NOINTERFACE;
}
} else if (iid == IID_IAccessibleTable || iid == IID_IAccessibleTable2) {
if (ia_role != ROLE_SYSTEM_TABLE) {
*object = NULL;
return E_NOINTERFACE;
}
} else if (iid == IID_IAccessibleTableCell) {
if (!accessibility->IsCellOrTableHeaderRole()) {
*object = NULL;
return E_NOINTERFACE;
}
} else if (iid == IID_IAccessibleValue) {
if (ia_role != ROLE_SYSTEM_PROGRESSBAR &&
ia_role != ROLE_SYSTEM_SCROLLBAR &&
ia_role != ROLE_SYSTEM_SLIDER) {
*object = NULL;
return E_NOINTERFACE;
}
} else if (iid == IID_ISimpleDOMDocument) {
if (ia_role != ROLE_SYSTEM_DOCUMENT) {
*object = NULL;
return E_NOINTERFACE;
}
}
return CComObjectRootBase::InternalQueryInterface(
this_ptr, entries, iid, object);
}
//
// Private methods.
//
void BrowserAccessibilityWin::UpdateStep1ComputeWinAttributes() {
// Swap win_attributes_ to old_win_attributes_, allowing us to see
// exactly what changed and fire appropriate events. Note that
// old_win_attributes_ is cleared at the end of UpdateStep3FireEvents.
old_win_attributes_.swap(win_attributes_);
win_attributes_.reset(new WinAttributes());
InitRoleAndState();
win_attributes_->ia2_attributes.clear();
// Expose autocomplete attribute for combobox and textbox.
StringAttributeToIA2(ui::AX_ATTR_AUTO_COMPLETE, "autocomplete");
// Expose the "display" and "tag" attributes.
StringAttributeToIA2(ui::AX_ATTR_DISPLAY, "display");
StringAttributeToIA2(ui::AX_ATTR_TEXT_INPUT_TYPE, "text-input-type");
StringAttributeToIA2(ui::AX_ATTR_HTML_TAG, "tag");
StringAttributeToIA2(ui::AX_ATTR_ROLE, "xml-roles");
// Expose "level" attribute for headings, trees, etc.
IntAttributeToIA2(ui::AX_ATTR_HIERARCHICAL_LEVEL, "level");
// Expose the set size and position in set for listbox options.
if (GetRole() == ui::AX_ROLE_LIST_BOX_OPTION &&
GetParent() &&
GetParent()->GetRole() == ui::AX_ROLE_LIST_BOX) {
win_attributes_->ia2_attributes.push_back(
L"setsize:" + base::IntToString16(GetParent()->PlatformChildCount()));
win_attributes_->ia2_attributes.push_back(
L"setsize:" + base::IntToString16(GetIndexInParent() + 1));
}
if (ia_role() == ROLE_SYSTEM_CHECKBUTTON ||
ia_role() == ROLE_SYSTEM_RADIOBUTTON ||
ia2_role() == IA2_ROLE_CHECK_MENU_ITEM ||
ia2_role() == IA2_ROLE_RADIO_MENU_ITEM ||
ia2_role() == IA2_ROLE_TOGGLE_BUTTON) {
win_attributes_->ia2_attributes.push_back(L"checkable:true");
}
// Expose live region attributes.
StringAttributeToIA2(ui::AX_ATTR_LIVE_STATUS, "live");
StringAttributeToIA2(ui::AX_ATTR_LIVE_RELEVANT, "relevant");
BoolAttributeToIA2(ui::AX_ATTR_LIVE_ATOMIC, "atomic");
BoolAttributeToIA2(ui::AX_ATTR_LIVE_BUSY, "busy");
// Expose aria-grabbed attributes.
BoolAttributeToIA2(ui::AX_ATTR_GRABBED, "grabbed");
// Expose container live region attributes.
StringAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_STATUS,
"container-live");
StringAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_RELEVANT,
"container-relevant");
BoolAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_ATOMIC,
"container-atomic");
BoolAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_BUSY,
"container-busy");
// Expose table cell index.
if (IsCellOrTableHeaderRole()) {
BrowserAccessibility* table = GetParent();
while (table && table->GetRole() != ui::AX_ROLE_TABLE)
table = table->GetParent();
if (table) {
const std::vector<int32>& unique_cell_ids = table->GetIntListAttribute(
ui::AX_ATTR_UNIQUE_CELL_IDS);
for (size_t i = 0; i < unique_cell_ids.size(); ++i) {
if (unique_cell_ids[i] == GetId()) {
win_attributes_->ia2_attributes.push_back(
base::string16(L"table-cell-index:") + base::IntToString16(i));
}
}
}
}
// Expose invalid state for form controls and elements with aria-invalid.
int invalid_state;
if (GetIntAttribute(ui::AX_ATTR_INVALID_STATE, &invalid_state)) {
// TODO(nektar): Handle the possibility of having multiple aria-invalid
// attributes defined, e.g., "invalid:spelling,grammar".
switch (invalid_state) {
case ui::AX_INVALID_STATE_NONE:
break;
case ui::AX_INVALID_STATE_FALSE:
win_attributes_->ia2_attributes.push_back(L"invalid:false");
break;
case ui::AX_INVALID_STATE_TRUE:
win_attributes_->ia2_attributes.push_back(L"invalid:true");
break;
case ui::AX_INVALID_STATE_SPELLING:
win_attributes_->ia2_attributes.push_back(L"invalid:spelling");
break;
case ui::AX_INVALID_STATE_GRAMMAR:
win_attributes_->ia2_attributes.push_back(L"invalid:grammar");
break;
case ui::AX_INVALID_STATE_OTHER:
{
base::string16 aria_invalid_value;
if (GetString16Attribute(ui::AX_ATTR_ARIA_INVALID_VALUE,
&aria_invalid_value)) {
win_attributes_->ia2_attributes.push_back(
L"invalid:" + aria_invalid_value);
} else {
// Set the attribute to L"true", since we cannot be more specific.
win_attributes_->ia2_attributes.push_back(L"invalid:true");
}
}
break;
default:
NOTREACHED();
}
}
// The calculation of the accessible name of an element has been
// standardized in the HTML to Platform Accessibility APIs Implementation
// Guide (http://www.w3.org/TR/html-aapi/). In order to return the
// appropriate accessible name on Windows, we need to apply some logic
// to the fields we get from WebKit.
//
// TODO(dmazzoni): move most of this logic into WebKit.
//
// WebKit gives us:
//
// name: the default name, e.g. inner text
// title ui element: a reference to a <label> element on the same
// page that labels this node.
// description: accessible labels that override the default name:
// aria-label or aria-labelledby or aria-describedby
// help: the value of the "title" attribute
//
// On Windows, the logic we apply lets some fields take precedence and
// always returns the primary name in "name" and the secondary name,
// if any, in "description".
int title_elem_id = GetIntAttribute(ui::AX_ATTR_TITLE_UI_ELEMENT);
base::string16 name = GetString16Attribute(ui::AX_ATTR_NAME);
base::string16 description = GetString16Attribute(ui::AX_ATTR_DESCRIPTION);
base::string16 help = GetString16Attribute(ui::AX_ATTR_HELP);
base::string16 value = GetString16Attribute(ui::AX_ATTR_VALUE);
// WebKit annoyingly puts the title in the description if there's no other
// description, which just confuses the rest of the logic. Put it back.
// Now "help" is always the value of the "title" attribute, if present.
base::string16 title_attr;
if (GetHtmlAttribute("title", &title_attr) &&
description == title_attr &&
help.empty()) {
help = description;
description.clear();
}
// Now implement the main logic: the descripion should become the name if
// it's nonempty, and the help should become the description if
// there's no description - or the name if there's no name or description.
if (!description.empty()) {
name = description;
description.clear();
}
if (!help.empty() && description.empty()) {
description = help;
help.clear();
}
if (!description.empty() && name.empty() && !title_elem_id) {
name = description;
description.clear();
}
// If it's a text field, also consider the placeholder.
base::string16 placeholder;
if (GetRole() == ui::AX_ROLE_TEXT_FIELD &&
HasState(ui::AX_STATE_FOCUSABLE) &&
GetHtmlAttribute("placeholder", &placeholder)) {
if (name.empty() && !title_elem_id) {
name = placeholder;
} else if (description.empty()) {
description = placeholder;
}
}
// On Windows, the value of a document should be its url.
if (GetRole() == ui::AX_ROLE_ROOT_WEB_AREA ||
GetRole() == ui::AX_ROLE_WEB_AREA) {
value = GetString16Attribute(ui::AX_ATTR_DOC_URL);
}
// For certain roles (listbox option, static text, and list marker)
// WebKit stores the main accessible text in the "value" - swap it so
// that it's the "name".
if (name.empty() &&
(GetRole() == ui::AX_ROLE_LIST_BOX_OPTION ||
GetRole() == ui::AX_ROLE_STATIC_TEXT ||
GetRole() == ui::AX_ROLE_LIST_MARKER)) {
base::string16 tmp = value;
value = name;
name = tmp;
}
// If this doesn't have a value and is linked then set its value to the url
// attribute. This allows screen readers to read an empty link's destination.
if (value.empty() && (ia_state() & STATE_SYSTEM_LINKED))
value = GetString16Attribute(ui::AX_ATTR_URL);
win_attributes_->name = name;
win_attributes_->description = description;
win_attributes_->help = help;
win_attributes_->value = value;
// Clear any old relationships between this node and other nodes.
for (size_t i = 0; i < relations_.size(); ++i)
relations_[i]->Release();
relations_.clear();
// Handle title UI element.
if (title_elem_id) {
// Add a labelled by relationship.
CComObject<BrowserAccessibilityRelation>* relation;
HRESULT hr = CComObject<BrowserAccessibilityRelation>::CreateInstance(
&relation);
DCHECK(SUCCEEDED(hr));
relation->AddRef();
relation->Initialize(this, IA2_RELATION_LABELLED_BY);
relation->AddTarget(title_elem_id);
relations_.push_back(relation);
}
// Expose slider value.
if (ia_role() == ROLE_SYSTEM_PROGRESSBAR ||
ia_role() == ROLE_SYSTEM_SCROLLBAR ||
ia_role() == ROLE_SYSTEM_SLIDER) {
win_attributes_->ia2_attributes.push_back(L"valuetext:" + GetValueText());
}
// If this is a web area for a presentational iframe, give it a role of
// something other than DOCUMENT so that the fact that it's a separate doc
// is not exposed to AT.
if (IsWebAreaForPresentationalIframe()) {
win_attributes_->ia_role = ROLE_SYSTEM_GROUPING;
win_attributes_->ia2_role = ROLE_SYSTEM_GROUPING;
}
}
void BrowserAccessibilityWin::UpdateStep2ComputeHypertext() {
// Construct the hypertext for this node, which contains the concatenation
// of all of the static text of this node's children and an embedded object
// character for all non-static-text children. Build up a map from the
// character index of each embedded object character to the id of the
// child object it points to.
for (unsigned int i = 0; i < PlatformChildCount(); ++i) {
BrowserAccessibilityWin* child =
PlatformGetChild(i)->ToBrowserAccessibilityWin();
if (child->GetRole() == ui::AX_ROLE_STATIC_TEXT) {
win_attributes_->hypertext += child->name();
} else {
int32 char_offset = hypertext().size();
int32 child_id = child->GetId();
int32 index = hyperlinks().size();
win_attributes_->hyperlink_offset_to_index[char_offset] = index;
win_attributes_->hyperlinks.push_back(child_id);
win_attributes_->hypertext += kEmbeddedCharacter;
}
}
}
void BrowserAccessibilityWin::UpdateStep3FireEvents(bool is_subtree_creation) {
BrowserAccessibilityManagerWin* manager =
this->manager()->ToBrowserAccessibilityManagerWin();
// Fire an event when an alert first appears.
if (ia_role() == ROLE_SYSTEM_ALERT &&
old_win_attributes_->ia_role != ROLE_SYSTEM_ALERT) {
manager->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, this);
}
// Fire an event when a new subtree is created.
if (is_subtree_creation)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_SHOW, this);
// The rest of the events only fire on changes, not on new objects.
if (old_win_attributes_->ia_role != 0 ||
!old_win_attributes_->role_name.empty()) {
// Fire an event if the name, description, help, or value changes.
if (name() != old_win_attributes_->name)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_NAMECHANGE, this);
if (description() != old_win_attributes_->description)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_DESCRIPTIONCHANGE, this);
if (help() != old_win_attributes_->help)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_HELPCHANGE, this);
if (value() != old_win_attributes_->value)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_VALUECHANGE, this);
if (ia_state() != old_win_attributes_->ia_state)
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_STATECHANGE, this);
// Normally focus events are handled elsewhere, however
// focus for managed descendants is platform-specific.
// Fire a focus event if the focused descendant in a multi-select
// list box changes.
if (GetRole() == ui::AX_ROLE_LIST_BOX_OPTION &&
(ia_state() & STATE_SYSTEM_FOCUSABLE) &&
(ia_state() & STATE_SYSTEM_SELECTABLE) &&
(ia_state() & STATE_SYSTEM_FOCUSED) &&
!(old_win_attributes_->ia_state & STATE_SYSTEM_FOCUSED)) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_FOCUS, this);
}
// Handle selection being added or removed.
bool is_selected_now = (ia_state() & STATE_SYSTEM_SELECTED) != 0;
bool was_selected_before =
(old_win_attributes_->ia_state & STATE_SYSTEM_SELECTED) != 0;
if (is_selected_now && !was_selected_before) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_SELECTIONADD, this);
} else if (!is_selected_now && was_selected_before) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_SELECTIONREMOVE, this);
}
// Fire an event if this container object has scrolled.
int sx = 0;
int sy = 0;
if (GetIntAttribute(ui::AX_ATTR_SCROLL_X, &sx) &&
GetIntAttribute(ui::AX_ATTR_SCROLL_Y, &sy)) {
if (sx != previous_scroll_x_ || sy != previous_scroll_y_)
manager->MaybeCallNotifyWinEvent(EVENT_SYSTEM_SCROLLINGEND, this);
previous_scroll_x_ = sx;
previous_scroll_y_ = sy;
}
// Changing a static text node can affect the IAccessibleText hypertext
// of the parent node, so force an update on the parent.
BrowserAccessibilityWin* parent = GetParent()->ToBrowserAccessibilityWin();
if (parent &&
GetRole() == ui::AX_ROLE_STATIC_TEXT &&
name() != old_win_attributes_->name) {
parent->UpdateStep1ComputeWinAttributes();
parent->UpdateStep2ComputeHypertext();
parent->UpdateStep3FireEvents(false);
}
// Fire hypertext-related events.
int start, old_len, new_len;
ComputeHypertextRemovedAndInserted(&start, &old_len, &new_len);
if (old_len > 0) {
// In-process screen readers may call IAccessibleText::get_oldText
// in reaction to this event to retrieve the text that was removed.
manager->MaybeCallNotifyWinEvent(IA2_EVENT_TEXT_REMOVED, this);
}
if (new_len > 0) {
// In-process screen readers may call IAccessibleText::get_newText
// in reaction to this event to retrieve the text that was inserted.
manager->MaybeCallNotifyWinEvent(IA2_EVENT_TEXT_INSERTED, this);
}
}
old_win_attributes_.reset(nullptr);
}
void BrowserAccessibilityWin::OnSubtreeWillBeDeleted() {
manager()->ToBrowserAccessibilityManagerWin()->MaybeCallNotifyWinEvent(
EVENT_OBJECT_HIDE, this);
}
void BrowserAccessibilityWin::NativeAddReference() {
AddRef();
}
void BrowserAccessibilityWin::NativeReleaseReference() {
Release();
}
bool BrowserAccessibilityWin::IsNative() const {
return true;
}
void BrowserAccessibilityWin::OnLocationChanged() {
manager()->ToBrowserAccessibilityManagerWin()->MaybeCallNotifyWinEvent(
EVENT_OBJECT_LOCATIONCHANGE, this);
}
BrowserAccessibilityWin* BrowserAccessibilityWin::NewReference() {
AddRef();
return this;
}
BrowserAccessibilityWin* BrowserAccessibilityWin::GetTargetFromChildID(
const VARIANT& var_id) {
if (var_id.vt != VT_I4)
return NULL;
LONG child_id = var_id.lVal;
if (child_id == CHILDID_SELF)
return this;
if (child_id >= 1 && child_id <= static_cast<LONG>(PlatformChildCount()))
return PlatformGetChild(child_id - 1)->ToBrowserAccessibilityWin();
return manager()->ToBrowserAccessibilityManagerWin()->
GetFromUniqueIdWin(child_id);
}
HRESULT BrowserAccessibilityWin::GetStringAttributeAsBstr(
ui::AXStringAttribute attribute,
BSTR* value_bstr) {
base::string16 str;
if (!GetString16Attribute(attribute, &str))
return S_FALSE;
if (str.empty())
return S_FALSE;
*value_bstr = SysAllocString(str.c_str());
DCHECK(*value_bstr);
return S_OK;
}
void BrowserAccessibilityWin::StringAttributeToIA2(
ui::AXStringAttribute attribute,
const char* ia2_attr) {
base::string16 value;
if (GetString16Attribute(attribute, &value)) {
win_attributes_->ia2_attributes.push_back(
base::ASCIIToUTF16(ia2_attr) + L":" + value);
}
}
void BrowserAccessibilityWin::BoolAttributeToIA2(
ui::AXBoolAttribute attribute,
const char* ia2_attr) {
bool value;
if (GetBoolAttribute(attribute, &value)) {
win_attributes_->ia2_attributes.push_back(
(base::ASCIIToUTF16(ia2_attr) + L":") +
(value ? L"true" : L"false"));
}
}
void BrowserAccessibilityWin::IntAttributeToIA2(
ui::AXIntAttribute attribute,
const char* ia2_attr) {
int value;
if (GetIntAttribute(attribute, &value)) {
win_attributes_->ia2_attributes.push_back(
base::ASCIIToUTF16(ia2_attr) + L":" +
base::IntToString16(value));
}
}
base::string16 BrowserAccessibilityWin::GetNameRecursive() const {
if (!name().empty()) {
return name();
}
base::string16 result;
for (uint32 i = 0; i < PlatformChildCount(); ++i) {
result += PlatformGetChild(i)->ToBrowserAccessibilityWin()->
GetNameRecursive();
}
return result;
}
base::string16 BrowserAccessibilityWin::GetValueText() {
float fval;
base::string16 value = this->value();
if (value.empty() &&
GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE, &fval)) {
value = base::UTF8ToUTF16(base::DoubleToString(fval));
}
return value;
}
base::string16 BrowserAccessibilityWin::TextForIAccessibleText() {
if (IsEditableText())
return value();
return (GetRole() == ui::AX_ROLE_STATIC_TEXT) ? name() : hypertext();
}
bool BrowserAccessibilityWin::IsSameHypertextCharacter(size_t old_char_index,
size_t new_char_index) {
CHECK(old_win_attributes_);
// For anything other than the "embedded character", we just compare the
// characters directly.
base::char16 old_ch = old_win_attributes_->hypertext[old_char_index];
base::char16 new_ch = win_attributes_->hypertext[new_char_index];
if (old_ch != new_ch)
return false;
if (old_ch == new_ch && new_ch != kEmbeddedCharacter)
return true;
// If it's an embedded character, they're only identical if the child id
// the hyperlink points to is the same.
std::map<int32, int32>& old_offset_to_index =
old_win_attributes_->hyperlink_offset_to_index;
std::vector<int32>& old_hyperlinks = old_win_attributes_->hyperlinks;
int32 old_hyperlinks_count = static_cast<int32>(old_hyperlinks.size());
std::map<int32, int32>::iterator iter;
iter = old_offset_to_index.find(old_char_index);
int old_index = (iter != old_offset_to_index.end()) ? iter->second : -1;
int old_child_id = (old_index >= 0 && old_index < old_hyperlinks_count) ?
old_hyperlinks[old_index] : -1;
std::map<int32, int32>& new_offset_to_index =
win_attributes_->hyperlink_offset_to_index;
std::vector<int32>& new_hyperlinks = win_attributes_->hyperlinks;
int32 new_hyperlinks_count = static_cast<int32>(new_hyperlinks.size());
iter = new_offset_to_index.find(new_char_index);
int new_index = (iter != new_offset_to_index.end()) ? iter->second : -1;
int new_child_id = (new_index >= 0 && new_index < new_hyperlinks_count) ?
new_hyperlinks[new_index] : -1;
return old_child_id == new_child_id;
}
void BrowserAccessibilityWin::ComputeHypertextRemovedAndInserted(
int* start, int* old_len, int* new_len) {
CHECK(old_win_attributes_);
*start = 0;
*old_len = 0;
*new_len = 0;
const base::string16& old_text = old_win_attributes_->hypertext;
const base::string16& new_text = hypertext();
size_t common_prefix = 0;
while (common_prefix < old_text.size() &&
common_prefix < new_text.size() &&
IsSameHypertextCharacter(common_prefix, common_prefix)) {
++common_prefix;
}
size_t common_suffix = 0;
while (common_prefix + common_suffix < old_text.size() &&
common_prefix + common_suffix < new_text.size() &&
IsSameHypertextCharacter(
old_text.size() - common_suffix - 1,
new_text.size() - common_suffix - 1)) {
++common_suffix;
}
*start = common_prefix;
*old_len = old_text.size() - common_prefix - common_suffix;
*new_len = new_text.size() - common_prefix - common_suffix;
}
void BrowserAccessibilityWin::HandleSpecialTextOffset(
const base::string16& text,
LONG* offset) {
if (*offset == IA2_TEXT_OFFSET_LENGTH)
*offset = static_cast<LONG>(text.size());
else if (*offset == IA2_TEXT_OFFSET_CARET)
get_caretOffset(offset);
}
ui::TextBoundaryType BrowserAccessibilityWin::IA2TextBoundaryToTextBoundary(
IA2TextBoundaryType ia2_boundary) {
switch(ia2_boundary) {
case IA2_TEXT_BOUNDARY_CHAR:
return ui::CHAR_BOUNDARY;
case IA2_TEXT_BOUNDARY_WORD:
return ui::WORD_BOUNDARY;
case IA2_TEXT_BOUNDARY_LINE:
return ui::LINE_BOUNDARY;
case IA2_TEXT_BOUNDARY_SENTENCE:
return ui::SENTENCE_BOUNDARY;
case IA2_TEXT_BOUNDARY_PARAGRAPH:
return ui::PARAGRAPH_BOUNDARY;
case IA2_TEXT_BOUNDARY_ALL:
return ui::ALL_BOUNDARY;
default:
NOTREACHED();
}
return ui::CHAR_BOUNDARY;
}
LONG BrowserAccessibilityWin::FindBoundary(
const base::string16& text,
IA2TextBoundaryType ia2_boundary,
LONG start_offset,
ui::TextBoundaryDirection direction) {
HandleSpecialTextOffset(text, &start_offset);
ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary);
const std::vector<int32>& line_breaks = GetIntListAttribute(
ui::AX_ATTR_LINE_BREAKS);
return ui::FindAccessibleTextBoundary(
text, line_breaks, boundary, start_offset, direction);
}
BrowserAccessibilityWin* BrowserAccessibilityWin::GetFromID(int32 id) {
return manager()->GetFromID(id)->ToBrowserAccessibilityWin();
}
void BrowserAccessibilityWin::InitRoleAndState() {
int32 ia_role = 0;
int32 ia_state = 0;
base::string16 role_name;
int32 ia2_role = 0;
int32 ia2_state = IA2_STATE_OPAQUE;
if (HasState(ui::AX_STATE_BUSY))
ia_state |= STATE_SYSTEM_BUSY;
if (HasState(ui::AX_STATE_CHECKED))
ia_state |= STATE_SYSTEM_CHECKED;
if (HasState(ui::AX_STATE_COLLAPSED))
ia_state |= STATE_SYSTEM_COLLAPSED;
if (HasState(ui::AX_STATE_EXPANDED))
ia_state |= STATE_SYSTEM_EXPANDED;
if (HasState(ui::AX_STATE_FOCUSABLE))
ia_state |= STATE_SYSTEM_FOCUSABLE;
if (HasState(ui::AX_STATE_HASPOPUP))
ia_state |= STATE_SYSTEM_HASPOPUP;
if (HasState(ui::AX_STATE_INDETERMINATE))
ia_state |= STATE_SYSTEM_INDETERMINATE;
if (HasIntAttribute(ui::AX_ATTR_INVALID_STATE) &&
GetIntAttribute(ui::AX_ATTR_INVALID_STATE) != ui::AX_INVALID_STATE_FALSE)
ia2_state |= IA2_STATE_INVALID_ENTRY;
if (HasState(ui::AX_STATE_INVISIBLE))
ia_state |= STATE_SYSTEM_INVISIBLE;
if (HasState(ui::AX_STATE_LINKED))
ia_state |= STATE_SYSTEM_LINKED;
if (HasState(ui::AX_STATE_MULTISELECTABLE)) {
ia_state |= STATE_SYSTEM_EXTSELECTABLE;
ia_state |= STATE_SYSTEM_MULTISELECTABLE;
}
// TODO(ctguil): Support STATE_SYSTEM_EXTSELECTABLE/accSelect.
if (HasState(ui::AX_STATE_OFFSCREEN))
ia_state |= STATE_SYSTEM_OFFSCREEN;
if (HasState(ui::AX_STATE_PRESSED))
ia_state |= STATE_SYSTEM_PRESSED;
if (HasState(ui::AX_STATE_PROTECTED))
ia_state |= STATE_SYSTEM_PROTECTED;
if (HasState(ui::AX_STATE_REQUIRED))
ia2_state |= IA2_STATE_REQUIRED;
if (HasState(ui::AX_STATE_SELECTABLE))
ia_state |= STATE_SYSTEM_SELECTABLE;
if (HasState(ui::AX_STATE_SELECTED))
ia_state |= STATE_SYSTEM_SELECTED;
if (HasState(ui::AX_STATE_VISITED))
ia_state |= STATE_SYSTEM_TRAVERSED;
if (!HasState(ui::AX_STATE_ENABLED))
ia_state |= STATE_SYSTEM_UNAVAILABLE;
if (HasState(ui::AX_STATE_VERTICAL))
ia2_state |= IA2_STATE_VERTICAL;
if (HasState(ui::AX_STATE_HORIZONTAL))
ia2_state |= IA2_STATE_HORIZONTAL;
if (HasState(ui::AX_STATE_VISITED))
ia_state |= STATE_SYSTEM_TRAVERSED;
// Expose whether or not the mouse is over an element, but suppress
// this for tests because it can make the test results flaky depending
// on the position of the mouse.
BrowserAccessibilityStateImpl* accessibility_state =
BrowserAccessibilityStateImpl::GetInstance();
if (!accessibility_state->disable_hot_tracking_for_testing()) {
if (HasState(ui::AX_STATE_HOVERED))
ia_state |= STATE_SYSTEM_HOTTRACKED;
}
// WebKit marks everything as readonly unless it's editable text, so if it's
// not readonly, mark it as editable now. The final computation of the
// READONLY state for MSAA is below, after the switch.
if (!HasState(ui::AX_STATE_READ_ONLY))
ia2_state |= IA2_STATE_EDITABLE;
if (GetBoolAttribute(ui::AX_ATTR_BUTTON_MIXED))
ia_state |= STATE_SYSTEM_MIXED;
if (GetBoolAttribute(ui::AX_ATTR_CAN_SET_VALUE))
ia2_state |= IA2_STATE_EDITABLE;
if (!GetStringAttribute(ui::AX_ATTR_AUTO_COMPLETE).empty())
ia2_state |= IA2_STATE_SUPPORTS_AUTOCOMPLETION;
base::string16 html_tag = GetString16Attribute(
ui::AX_ATTR_HTML_TAG);
switch (GetRole()) {
case ui::AX_ROLE_ALERT:
ia_role = ROLE_SYSTEM_ALERT;
break;
case ui::AX_ROLE_ALERT_DIALOG:
ia_role = ROLE_SYSTEM_DIALOG;
break;
case ui::AX_ROLE_APPLICATION:
ia_role = ROLE_SYSTEM_APPLICATION;
break;
case ui::AX_ROLE_ARTICLE:
ia_role = ROLE_SYSTEM_DOCUMENT;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_BANNER:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_HEADER;
break;
case ui::AX_ROLE_BLOCKQUOTE:
role_name = html_tag;
ia2_role = IA2_ROLE_SECTION;
break;
case ui::AX_ROLE_BUSY_INDICATOR:
ia_role = ROLE_SYSTEM_ANIMATION;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_BUTTON:
ia_role = ROLE_SYSTEM_PUSHBUTTON;
break;
case ui::AX_ROLE_CANVAS:
if (GetBoolAttribute(ui::AX_ATTR_CANVAS_HAS_FALLBACK)) {
role_name = L"canvas";
ia2_role = IA2_ROLE_CANVAS;
} else {
ia_role = ROLE_SYSTEM_GRAPHIC;
}
break;
case ui::AX_ROLE_CAPTION:
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_CAPTION;
break;
case ui::AX_ROLE_CELL:
ia_role = ROLE_SYSTEM_CELL;
break;
case ui::AX_ROLE_CHECK_BOX:
ia_role = ROLE_SYSTEM_CHECKBUTTON;
ia2_state |= IA2_STATE_CHECKABLE;
break;
case ui::AX_ROLE_COLOR_WELL:
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_COLOR_CHOOSER;
break;
case ui::AX_ROLE_COLUMN:
ia_role = ROLE_SYSTEM_COLUMN;
break;
case ui::AX_ROLE_COLUMN_HEADER:
ia_role = ROLE_SYSTEM_COLUMNHEADER;
break;
case ui::AX_ROLE_COMBO_BOX:
ia_role = ROLE_SYSTEM_COMBOBOX;
break;
case ui::AX_ROLE_COMPLEMENTARY:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_NOTE;
break;
case ui::AX_ROLE_CONTENT_INFO:
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_PARAGRAPH;
break;
case ui::AX_ROLE_DATE:
case ui::AX_ROLE_DATE_TIME:
ia_role = ROLE_SYSTEM_DROPLIST;
ia2_role = IA2_ROLE_DATE_EDITOR;
break;
case ui::AX_ROLE_DIV:
role_name = L"div";
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_SECTION;
break;
case ui::AX_ROLE_DEFINITION:
role_name = html_tag;
ia2_role = IA2_ROLE_PARAGRAPH;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_DESCRIPTION_LIST_DETAIL:
role_name = html_tag;
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_PARAGRAPH;
break;
case ui::AX_ROLE_DESCRIPTION_LIST:
role_name = html_tag;
ia_role = ROLE_SYSTEM_LIST;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_DESCRIPTION_LIST_TERM:
ia_role = ROLE_SYSTEM_LISTITEM;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_DETAILS:
role_name = html_tag;
ia_role = ROLE_SYSTEM_GROUPING;
break;
case ui::AX_ROLE_DIALOG:
ia_role = ROLE_SYSTEM_DIALOG;
break;
case ui::AX_ROLE_DISCLOSURE_TRIANGLE:
ia_role = ROLE_SYSTEM_PUSHBUTTON;
break;
case ui::AX_ROLE_DOCUMENT:
case ui::AX_ROLE_ROOT_WEB_AREA:
case ui::AX_ROLE_WEB_AREA:
ia_role = ROLE_SYSTEM_DOCUMENT;
ia_state |= STATE_SYSTEM_READONLY;
ia_state |= STATE_SYSTEM_FOCUSABLE;
break;
case ui::AX_ROLE_EMBEDDED_OBJECT:
ia_role = ROLE_SYSTEM_CLIENT;
ia2_role = IA2_ROLE_EMBEDDED_OBJECT;
break;
case ui::AX_ROLE_FIGCAPTION:
role_name = html_tag;
ia2_role = IA2_ROLE_CAPTION;
break;
case ui::AX_ROLE_FIGURE:
ia_role = ROLE_SYSTEM_GROUPING;
break;
case ui::AX_ROLE_FORM:
role_name = L"form";
ia2_role = IA2_ROLE_FORM;
break;
case ui::AX_ROLE_FOOTER:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_FOOTER;
break;
case ui::AX_ROLE_GRID:
ia_role = ROLE_SYSTEM_TABLE;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_GROUP: {
base::string16 aria_role = GetString16Attribute(
ui::AX_ATTR_ROLE);
if (aria_role == L"group" || html_tag == L"fieldset") {
ia_role = ROLE_SYSTEM_GROUPING;
} else if (html_tag == L"li") {
ia_role = ROLE_SYSTEM_LISTITEM;
ia_state |= STATE_SYSTEM_READONLY;
} else {
if (html_tag.empty())
role_name = L"div";
else
role_name = html_tag;
ia2_role = IA2_ROLE_SECTION;
}
break;
}
case ui::AX_ROLE_HEADING:
role_name = html_tag;
ia2_role = IA2_ROLE_HEADING;
break;
case ui::AX_ROLE_IFRAME:
ia_role = ROLE_SYSTEM_DOCUMENT;
ia2_role = IA2_ROLE_INTERNAL_FRAME;
ia_state = STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_IFRAME_PRESENTATIONAL:
ia_role = ROLE_SYSTEM_GROUPING;
break;
case ui::AX_ROLE_IMAGE:
ia_role = ROLE_SYSTEM_GRAPHIC;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_IMAGE_MAP:
role_name = html_tag;
ia2_role = IA2_ROLE_IMAGE_MAP;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_IMAGE_MAP_LINK:
ia_role = ROLE_SYSTEM_LINK;
ia_state |= STATE_SYSTEM_LINKED;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_LABEL_TEXT:
case ui::AX_ROLE_LEGEND:
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_LABEL;
break;
case ui::AX_ROLE_SEARCH:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_SECTION;
break;
case ui::AX_ROLE_LINK:
ia_role = ROLE_SYSTEM_LINK;
ia_state |= STATE_SYSTEM_LINKED;
break;
case ui::AX_ROLE_LIST:
ia_role = ROLE_SYSTEM_LIST;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_LIST_BOX:
ia_role = ROLE_SYSTEM_LIST;
break;
case ui::AX_ROLE_LIST_BOX_OPTION:
ia_role = ROLE_SYSTEM_LISTITEM;
if (ia_state & STATE_SYSTEM_SELECTABLE) {
ia_state |= STATE_SYSTEM_FOCUSABLE;
if (HasState(ui::AX_STATE_FOCUSED))
ia_state |= STATE_SYSTEM_FOCUSED;
}
break;
case ui::AX_ROLE_LIST_ITEM:
ia_role = ROLE_SYSTEM_LISTITEM;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_MAIN:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_PARAGRAPH;
break;
case ui::AX_ROLE_MARQUEE:
ia_role = ROLE_SYSTEM_ANIMATION;
break;
case ui::AX_ROLE_MATH:
ia_role = ROLE_SYSTEM_EQUATION;
break;
case ui::AX_ROLE_MENU:
case ui::AX_ROLE_MENU_BUTTON:
ia_role = ROLE_SYSTEM_MENUPOPUP;
break;
case ui::AX_ROLE_MENU_BAR:
ia_role = ROLE_SYSTEM_MENUBAR;
break;
case ui::AX_ROLE_MENU_ITEM:
ia_role = ROLE_SYSTEM_MENUITEM;
break;
case ui::AX_ROLE_MENU_ITEM_CHECK_BOX:
ia_role = ROLE_SYSTEM_MENUITEM;
ia2_role = IA2_ROLE_CHECK_MENU_ITEM;
ia2_state |= IA2_STATE_CHECKABLE;
break;
case ui::AX_ROLE_MENU_ITEM_RADIO:
ia_role = ROLE_SYSTEM_MENUITEM;
ia2_role = IA2_ROLE_RADIO_MENU_ITEM;
break;
case ui::AX_ROLE_MENU_LIST_POPUP:
ia_role = ROLE_SYSTEM_CLIENT;
break;
case ui::AX_ROLE_MENU_LIST_OPTION:
ia_role = ROLE_SYSTEM_LISTITEM;
if (ia_state & STATE_SYSTEM_SELECTABLE) {
ia_state |= STATE_SYSTEM_FOCUSABLE;
if (HasState(ui::AX_STATE_FOCUSED))
ia_state |= STATE_SYSTEM_FOCUSED;
}
break;
case ui::AX_ROLE_METER:
role_name = html_tag;
ia_role = ROLE_SYSTEM_PROGRESSBAR;
break;
case ui::AX_ROLE_NAVIGATION:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_SECTION;
break;
case ui::AX_ROLE_NOTE:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_NOTE;
break;
case ui::AX_ROLE_OUTLINE:
ia_role = ROLE_SYSTEM_OUTLINE;
break;
case ui::AX_ROLE_PARAGRAPH:
role_name = L"P";
ia2_role = IA2_ROLE_PARAGRAPH;
break;
case ui::AX_ROLE_POP_UP_BUTTON:
if (html_tag == L"select") {
ia_role = ROLE_SYSTEM_COMBOBOX;
} else {
ia_role = ROLE_SYSTEM_BUTTONMENU;
}
break;
case ui::AX_ROLE_PRE:
role_name = html_tag;
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_PARAGRAPH;
break;
case ui::AX_ROLE_PROGRESS_INDICATOR:
ia_role = ROLE_SYSTEM_PROGRESSBAR;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_RADIO_BUTTON:
ia_role = ROLE_SYSTEM_RADIOBUTTON;
ia2_state = IA2_STATE_CHECKABLE;
break;
case ui::AX_ROLE_RADIO_GROUP:
ia_role = ROLE_SYSTEM_GROUPING;
break;
case ui::AX_ROLE_REGION:
if (html_tag == L"section") {
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_SECTION;
} else {
ia_role = ROLE_SYSTEM_PANE;
}
break;
case ui::AX_ROLE_ROW:
ia_role = ROLE_SYSTEM_ROW;
break;
case ui::AX_ROLE_ROW_HEADER:
ia_role = ROLE_SYSTEM_ROWHEADER;
break;
case ui::AX_ROLE_RUBY:
ia_role = ROLE_SYSTEM_TEXT;
ia2_role = IA2_ROLE_TEXT_FRAME;
break;
case ui::AX_ROLE_RULER:
ia_role = ROLE_SYSTEM_CLIENT;
ia2_role = IA2_ROLE_RULER;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_SCROLL_AREA:
ia_role = ROLE_SYSTEM_CLIENT;
ia2_role = IA2_ROLE_SCROLL_PANE;
ia_state |= STATE_SYSTEM_READONLY;
ia2_state &= ~(IA2_STATE_EDITABLE);
break;
case ui::AX_ROLE_SCROLL_BAR:
ia_role = ROLE_SYSTEM_SCROLLBAR;
break;
case ui::AX_ROLE_SLIDER:
ia_role = ROLE_SYSTEM_SLIDER;
break;
case ui::AX_ROLE_SPIN_BUTTON:
ia_role = ROLE_SYSTEM_SPINBUTTON;
break;
case ui::AX_ROLE_SPIN_BUTTON_PART:
ia_role = ROLE_SYSTEM_PUSHBUTTON;
break;
case ui::AX_ROLE_ANNOTATION:
case ui::AX_ROLE_LIST_MARKER:
case ui::AX_ROLE_STATIC_TEXT:
ia_role = ROLE_SYSTEM_STATICTEXT;
break;
case ui::AX_ROLE_STATUS:
ia_role = ROLE_SYSTEM_STATUSBAR;
break;
case ui::AX_ROLE_SPLITTER:
ia_role = ROLE_SYSTEM_SEPARATOR;
break;
case ui::AX_ROLE_SVG_ROOT:
ia_role = ROLE_SYSTEM_GRAPHIC;
break;
case ui::AX_ROLE_TAB:
ia_role = ROLE_SYSTEM_PAGETAB;
break;
case ui::AX_ROLE_TABLE: {
base::string16 aria_role = GetString16Attribute(
ui::AX_ATTR_ROLE);
if (aria_role == L"treegrid") {
ia_role = ROLE_SYSTEM_OUTLINE;
} else {
ia_role = ROLE_SYSTEM_TABLE;
}
break;
}
case ui::AX_ROLE_TABLE_HEADER_CONTAINER:
ia_role = ROLE_SYSTEM_GROUPING;
ia2_role = IA2_ROLE_SECTION;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_TAB_LIST:
ia_role = ROLE_SYSTEM_PAGETABLIST;
break;
case ui::AX_ROLE_TAB_PANEL:
ia_role = ROLE_SYSTEM_PROPERTYPAGE;
break;
case ui::AX_ROLE_TOGGLE_BUTTON:
ia_role = ROLE_SYSTEM_PUSHBUTTON;
ia2_role = IA2_ROLE_TOGGLE_BUTTON;
break;
case ui::AX_ROLE_TEXT_AREA:
ia_role = ROLE_SYSTEM_TEXT;
ia2_state |= IA2_STATE_MULTI_LINE;
ia2_state |= IA2_STATE_EDITABLE;
ia2_state |= IA2_STATE_SELECTABLE_TEXT;
break;
case ui::AX_ROLE_TEXT_FIELD:
ia_role = ROLE_SYSTEM_TEXT;
ia2_state |= IA2_STATE_SINGLE_LINE;
ia2_state |= IA2_STATE_EDITABLE;
ia2_state |= IA2_STATE_SELECTABLE_TEXT;
break;
case ui::AX_ROLE_TIME:
ia_role = ROLE_SYSTEM_SPINBUTTON;
break;
case ui::AX_ROLE_TIMER:
ia_role = ROLE_SYSTEM_CLOCK;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_TOOLBAR:
ia_role = ROLE_SYSTEM_TOOLBAR;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_TOOLTIP:
ia_role = ROLE_SYSTEM_TOOLTIP;
ia_state |= STATE_SYSTEM_READONLY;
break;
case ui::AX_ROLE_TREE:
ia_role = ROLE_SYSTEM_OUTLINE;
break;
case ui::AX_ROLE_TREE_GRID:
ia_role = ROLE_SYSTEM_OUTLINE;
break;
case ui::AX_ROLE_TREE_ITEM:
ia_role = ROLE_SYSTEM_OUTLINEITEM;
break;
case ui::AX_ROLE_LINE_BREAK:
ia_role = ROLE_SYSTEM_WHITESPACE;
break;
case ui::AX_ROLE_WINDOW:
ia_role = ROLE_SYSTEM_WINDOW;
break;
// TODO(dmazzoni): figure out the proper MSAA role for all of these.
case ui::AX_ROLE_DIRECTORY:
case ui::AX_ROLE_IGNORED:
case ui::AX_ROLE_LOG:
case ui::AX_ROLE_NONE:
case ui::AX_ROLE_PRESENTATIONAL:
case ui::AX_ROLE_SLIDER_THUMB:
default:
ia_role = ROLE_SYSTEM_CLIENT;
break;
}
// Compute the final value of READONLY for MSAA.
//
// We always set the READONLY state for elements that have the
// aria-readonly attribute and for a few roles (in the switch above).
// We clear the READONLY state on focusable controls and on a document.
// Everything else, the majority of objects, do not have this state set.
if (HasState(ui::AX_STATE_FOCUSABLE) &&
ia_role != ROLE_SYSTEM_DOCUMENT) {
ia_state &= ~(STATE_SYSTEM_READONLY);
}
if (!HasState(ui::AX_STATE_READ_ONLY))
ia_state &= ~(STATE_SYSTEM_READONLY);
if (GetBoolAttribute(ui::AX_ATTR_ARIA_READONLY))
ia_state |= STATE_SYSTEM_READONLY;
// The role should always be set.
DCHECK(!role_name.empty() || ia_role);
// If we didn't explicitly set the IAccessible2 role, make it the same
// as the MSAA role.
if (!ia2_role)
ia2_role = ia_role;
win_attributes_->ia_role = ia_role;
win_attributes_->ia_state = ia_state;
win_attributes_->role_name = role_name;
win_attributes_->ia2_role = ia2_role;
win_attributes_->ia2_state = ia2_state;
}
} // namespace content