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android / platform / external / chromium_org / d57369d / . / content / browser / accessibility / browser_accessibility_win.cc
blob: 2c0150322b9eb6237e8ee27477f642458c2620ee [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/base/accessibility/accessible_text_utils.h"
#include "ui/base/win/accessibility_ids_win.h"
#include "ui/base/win/accessibility_misc_utils.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 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->GetFromRendererID(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->GetFromRendererID(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
//
// static
BrowserAccessibility* BrowserAccessibility::Create() {
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()
: ia_role_(0),
ia_state_(0),
ia2_role_(0),
ia2_state_(0),
first_time_(true),
old_ia_state_(0),
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(
AccessibilityNodeData::ATTR_SHORTCUT, 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;
return target->GetStringAttributeAsBstr(
AccessibilityNodeData::ATTR_DESCRIPTION, desc);
}
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;
return target->GetStringAttributeAsBstr(
AccessibilityNodeData::ATTR_HELP, help);
}
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(
AccessibilityNodeData::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;
std::string 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(AccessibilityNodeData::ATTR_TITLE_UI_ELEMENT,
&title_elem_id)) {
BrowserAccessibility* title_elem =
manager()->GetFromRendererID(title_elem_id);
if (title_elem)
name_str = title_elem->GetTextRecursive();
}
}
if (name_str.empty())
return S_FALSE;
*name = SysAllocString(UTF8ToUTF16(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 = parent()->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()->parent_iaccessible();
// |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. Crash hard if this happens so that we get crash reports.
CHECK(parent_obj);
}
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(
AccessibilityNodeData::ATTR_COLOR_VALUE_RED);
int g = target->GetIntAttribute(
AccessibilityNodeData::ATTR_COLOR_VALUE_GREEN);
int b = target->GetIntAttribute(
AccessibilityNodeData::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(UTF8ToUTF16(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 (blink_role() != blink::WebAXRoleListBox)
return E_NOTIMPL;
unsigned long selected_count = 0;
for (size_t i = 0; i < children().size(); ++i) {
if (children()[i]->HasState(blink::WebAXStateSelected))
++selected_count;
}
if (selected_count == 0) {
selected->vt = VT_EMPTY;
return S_OK;
}
if (selected_count == 1) {
for (size_t i = 0; i < children().size(); ++i) {
if (children()[i]->HasState(blink::WebAXStateSelected)) {
selected->vt = VT_DISPATCH;
selected->pdispVal =
children()[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 < children().size(); ++i) {
if (children()[i]->HasState(blink::WebAXStateSelected)) {
enum_variant->ItemAt(index)->vt = VT_DISPATCH;
enum_variant->ItemAt(index)->pdispVal =
children()[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;
for (unsigned int i = 0; i < ia2_attributes_.size(); ++i) {
if (i != 0)
str += L';';
str += ia2_attributes_[i];
}
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()->parent_hwnd();
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->index_in_parent();
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 = location();
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 (parent())
scroll_to += parent()->location().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 (blink_role() == blink::WebAXRoleListBoxOption &&
parent() &&
parent()->role() == blink::WebAXRoleListBox) {
*group_level = 0;
*similar_items_in_group = parent()->PlatformChildCount();
*position_in_group = index_in_parent() + 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(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(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(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;
return GetStringAttributeAsBstr(
AccessibilityNodeData::ATTR_DESCRIPTION, desc);
}
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()->parent_hwnd();
POINT top_left = {0, 0};
::ClientToScreen(parent_hwnd, &top_left);
*x = location().x() + top_left.x;
*y = location().y() + top_left.y;
} else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) {
*x = location().x();
*y = location().y();
if (parent()) {
*x -= parent()->location().x();
*y -= parent()->location().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 = location().height();
*width = location().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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
DCHECK_EQ(columns * rows, static_cast<int>(cell_ids.size()));
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell = GetFromRendererID(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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
const std::vector<int32>& unique_cell_ids = GetIntListAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
for (int i = 0; i < rows; ++i) {
int cell_id = cell_ids[i * columns + column];
BrowserAccessibilityWin* cell = static_cast<BrowserAccessibilityWin*>(
manager()->GetFromRendererID(cell_id));
if (cell && cell->blink_role() == blink::WebAXRoleColumnHeader) {
base::string16 cell_name = cell->GetString16Attribute(
AccessibilityNodeData::ATTR_NAME);
if (cell_name.size() > 0) {
*description = SysAllocString(cell_name.c_str());
return S_OK;
}
return cell->GetStringAttributeAsBstr(
AccessibilityNodeData::ATTR_DESCRIPTION, description);
}
}
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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell = static_cast<BrowserAccessibilityWin*>(
manager()->GetFromRendererID(cell_id));
int colspan;
if (cell &&
cell->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::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()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
int col_index;
if (cell &&
cell->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::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(AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
for (int i = 0; i < columns; ++i) {
int cell_id = cell_ids[row * columns + i];
BrowserAccessibilityWin* cell =
manager()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
if (cell && cell->blink_role() == blink::WebAXRoleRowHeader) {
base::string16 cell_name = cell->GetString16Attribute(
AccessibilityNodeData::ATTR_NAME);
if (cell_name.size() > 0) {
*description = SysAllocString(cell_name.c_str());
return S_OK;
}
return cell->GetStringAttributeAsBstr(
AccessibilityNodeData::ATTR_DESCRIPTION, description);
}
}
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(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!GetIntAttribute(AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
int cell_id = cell_ids[row * columns + column];
BrowserAccessibilityWin* cell =
manager()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
int rowspan;
if (cell &&
cell->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::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()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
int cell_row_index;
if (cell &&
cell->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::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()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
int rowspan;
int colspan;
if (cell &&
cell->GetIntAttribute(
AccessibilityNodeData::ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
cell->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_TABLE_CELL_COLUMN_INDEX, &column)) {
return S_FALSE;
}
BrowserAccessibility* table = parent();
while (table && table->role() != blink::WebAXRoleTable)
table = table->parent();
if (!table) {
NOTREACHED();
return S_FALSE;
}
int columns;
int rows;
if (!table->GetIntAttribute(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!table->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
for (int i = 0; i < rows; ++i) {
int cell_id = cell_ids[i * columns + column];
BrowserAccessibilityWin* cell =
manager()->GetFromRendererID(cell_id)->ToBrowserAccessibilityWin();
if (cell && cell->blink_role() == blink::WebAXRoleColumnHeader)
(*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()->GetFromRendererID(cell_id);
if (cell && cell->role() == blink::WebAXRoleColumnHeader) {
(*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(
AccessibilityNodeData::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(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_TABLE_CELL_ROW_INDEX, &row)) {
return S_FALSE;
}
BrowserAccessibility* table = parent();
while (table && table->role() != blink::WebAXRoleTable)
table = table->parent();
if (!table) {
NOTREACHED();
return S_FALSE;
}
int columns;
int rows;
if (!table->GetIntAttribute(
AccessibilityNodeData::ATTR_TABLE_COLUMN_COUNT, &columns) ||
!table->GetIntAttribute(
AccessibilityNodeData::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(
AccessibilityNodeData::ATTR_CELL_IDS);
for (int i = 0; i < columns; ++i) {
int cell_id = cell_ids[row * columns + i];
BrowserAccessibility* cell = manager()->GetFromRendererID(cell_id);
if (cell && cell->role() == blink::WebAXRoleRowHeader)
(*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()->GetFromRendererID(cell_id);
if (cell && cell->role() == blink::WebAXRoleRowHeader) {
(*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(AccessibilityNodeData::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(AccessibilityNodeData::ATTR_TABLE_CELL_ROW_INDEX, &row) &&
GetIntAttribute(
AccessibilityNodeData::ATTR_TABLE_CELL_COLUMN_INDEX, &column) &&
GetIntAttribute(
AccessibilityNodeData::ATTR_TABLE_CELL_ROW_SPAN, &rowspan) &&
GetIntAttribute(
AccessibilityNodeData::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(AccessibilityNodeData::ATTR_TABLE_CELL_ROW_INDEX, &row);
GetIntAttribute(AccessibilityNodeData::ATTR_TABLE_CELL_COLUMN_INDEX, &column);
BrowserAccessibility* find_table = parent();
while (find_table && find_table->role() != blink::WebAXRoleTable)
find_table = find_table->parent();
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 (blink_role() == blink::WebAXRoleTextField ||
blink_role() == blink::WebAXRoleTextArea) {
int sel_start = 0;
if (GetIntAttribute(AccessibilityNodeData::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;
if (blink_role() != blink::WebAXRoleStaticText)
return E_FAIL;
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 -= location().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 (blink_role() == blink::WebAXRoleTextField ||
blink_role() == blink::WebAXRoleTextArea) {
int sel_start = 0;
int sel_end = 0;
if (GetIntAttribute(AccessibilityNodeData::ATTR_TEXT_SEL_START,
&sel_start) &&
GetIntAttribute(AccessibilityNodeData::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 (blink_role() == blink::WebAXRoleTextField ||
blink_role() == blink::WebAXRoleTextArea) {
int sel_start = 0;
int sel_end = 0;
if (GetIntAttribute(
AccessibilityNodeData::ATTR_TEXT_SEL_START, &sel_start) &&
GetIntAttribute(AccessibilityNodeData::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;
base::string16 text = TextForIAccessibleText();
new_text->text = SysAllocString(text.c_str());
new_text->start = 0;
new_text->end = static_cast<long>(text.size());
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_oldText(IA2TextSegment* old_text) {
if (!instance_active())
return E_FAIL;
if (!old_text)
return E_INVALIDARG;
old_text->text = SysAllocString(old_text_.c_str());
old_text->start = 0;
old_text->end = static_cast<long>(old_text_.size());
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;
}
BrowserAccessibilityWin* child =
children()[hyperlinks_[index]]->ToBrowserAccessibilityWin();
*hyperlink = static_cast<IAccessibleHyperlink*>(child->NewReference());
return S_OK;
}
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(
AccessibilityNodeData::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(AccessibilityNodeData::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(AccessibilityNodeData::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(AccessibilityNodeData::ATTR_DOC_URL, url);
}
STDMETHODIMP BrowserAccessibilityWin::get_title(BSTR* title) {
if (!instance_active())
return E_FAIL;
if (!title)
return E_INVALIDARG;
return GetStringAttributeAsBstr(AccessibilityNodeData::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(
AccessibilityNodeData::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(
AccessibilityNodeData::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(AccessibilityNodeData::ATTR_HTML_TAG, &tag))
*node_name = SysAllocString(tag.c_str());
else
*node_name = NULL;
*name_space_id = 0;
*node_value = SysAllocString(UTF8ToUTF16(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 > html_attributes().size())
*num_attribs = html_attributes().size();
for (unsigned short i = 0; i < *num_attribs; ++i) {
attrib_names[i] = SysAllocString(
UTF8ToUTF16(html_attributes()[i].first).c_str());
name_space_id[i] = 0;
attrib_values[i] = SysAllocString(
UTF8ToUTF16(html_attributes()[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 = UTF16ToUTF8((LPCWSTR)attrib_names[i]);
for (unsigned int j = 0; j < html_attributes().size(); ++j) {
if (html_attributes()[j].first == name) {
attrib_values[i] = SysAllocString(
UTF8ToUTF16(html_attributes()[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(AccessibilityNodeData::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];
StringToLowerASCII(&name);
if (name == L"display") {
base::string16 display = GetString16Attribute(
AccessibilityNodeData::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 = parent()->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 (!parent() || index_in_parent() <= 0) {
*node = NULL;
return S_FALSE;
}
*node = parent()->children()[index_in_parent() - 1]->
ToBrowserAccessibilityWin()->NewReference();
return S_OK;
}
STDMETHODIMP BrowserAccessibilityWin::get_nextSibling(ISimpleDOMNode** node) {
if (!instance_active())
return E_FAIL;
if (!node)
return E_INVALIDARG;
if (!parent() ||
index_in_parent() < 0 ||
index_in_parent() >= static_cast<int>(parent()->children().size()) - 1) {
*node = NULL;
return S_FALSE;
}
*node = parent()->children()[index_in_parent() + 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(
AccessibilityNodeData::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;
}
if (blink_role() != blink::WebAXRoleStaticText)
return E_FAIL;
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()) {
// The BrowserAccessibilityManager keeps track of instances when
// we don't want to show the on-screen keyboard.
if (!manager()->IsOSKAllowed(GetGlobalBoundsRect()))
return E_NOTIMPL;
DVLOG(1) << "Returning UIA text provider";
base::win::UIATextProvider::CreateTextProvider(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.
//
HRESULT WINAPI BrowserAccessibilityWin::InternalQueryInterface(
void* this_ptr,
const _ATL_INTMAP_ENTRY* entries,
REFIID iid,
void** object) {
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 (ia_role_ != ROLE_SYSTEM_CELL) {
*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.
//
// Initialize this object and mark it as active.
void BrowserAccessibilityWin::PreInitialize() {
BrowserAccessibility::PreInitialize();
InitRoleAndState();
// Expose the "display" and "tag" attributes.
StringAttributeToIA2(AccessibilityNodeData::ATTR_DISPLAY, "display");
StringAttributeToIA2(AccessibilityNodeData::ATTR_HTML_TAG, "tag");
StringAttributeToIA2(AccessibilityNodeData::ATTR_ROLE, "xml-roles");
// Expose "level" attribute for headings, trees, etc.
IntAttributeToIA2(AccessibilityNodeData::ATTR_HIERARCHICAL_LEVEL, "level");
// Expose the set size and position in set for listbox options.
if (blink_role() == blink::WebAXRoleListBoxOption &&
parent() &&
parent()->role() == blink::WebAXRoleListBox) {
ia2_attributes_.push_back(
L"setsize:" + base::IntToString16(parent()->PlatformChildCount()));
ia2_attributes_.push_back(
L"setsize:" + base::IntToString16(index_in_parent() + 1));
}
if (ia_role_ == ROLE_SYSTEM_CHECKBUTTON ||
ia_role_ == ROLE_SYSTEM_RADIOBUTTON ||
ia2_role_ == IA2_ROLE_TOGGLE_BUTTON) {
ia2_attributes_.push_back(L"checkable:true");
}
// Expose live region attributes.
StringAttributeToIA2(AccessibilityNodeData::ATTR_LIVE_STATUS, "live");
StringAttributeToIA2(AccessibilityNodeData::ATTR_LIVE_RELEVANT, "relevant");
BoolAttributeToIA2(AccessibilityNodeData::ATTR_LIVE_ATOMIC, "atomic");
BoolAttributeToIA2(AccessibilityNodeData::ATTR_LIVE_BUSY, "busy");
// Expose container live region attributes.
StringAttributeToIA2(AccessibilityNodeData::ATTR_CONTAINER_LIVE_STATUS,
"container-live");
StringAttributeToIA2(AccessibilityNodeData::ATTR_CONTAINER_LIVE_RELEVANT,
"container-relevant");
BoolAttributeToIA2(AccessibilityNodeData::ATTR_CONTAINER_LIVE_ATOMIC,
"container-atomic");
BoolAttributeToIA2(AccessibilityNodeData::ATTR_CONTAINER_LIVE_BUSY,
"container-busy");
// Expose slider value.
if (ia_role_ == ROLE_SYSTEM_PROGRESSBAR ||
ia_role_ == ROLE_SYSTEM_SCROLLBAR ||
ia_role_ == ROLE_SYSTEM_SLIDER) {
ia2_attributes_.push_back(L"valuetext:" + GetValueText());
}
// Expose table cell index.
if (ia_role_ == ROLE_SYSTEM_CELL) {
BrowserAccessibility* table = parent();
while (table && table->role() != blink::WebAXRoleTable)
table = table->parent();
if (table) {
const std::vector<int32>& unique_cell_ids = table->GetIntListAttribute(
AccessibilityNodeData::ATTR_UNIQUE_CELL_IDS);
for (size_t i = 0; i < unique_cell_ids.size(); ++i) {
if (unique_cell_ids[i] == renderer_id()) {
ia2_attributes_.push_back(
base::string16(L"table-cell-index:") + base::IntToString16(i));
}
}
}
}
// 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(
AccessibilityNodeData::ATTR_TITLE_UI_ELEMENT);
std::string help = GetStringAttribute(AccessibilityNodeData::ATTR_HELP);
std::string description = GetStringAttribute(
AccessibilityNodeData::ATTR_DESCRIPTION);
// 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.
std::string 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()) {
set_name(description);
description.clear();
}
if (!help.empty() && description.empty()) {
description = help;
help.clear();
}
if (!description.empty() && name().empty() && !title_elem_id) {
set_name(description);
description.clear();
}
// If it's a text field, also consider the placeholder.
std::string placeholder;
if (blink_role() == blink::WebAXRoleTextField &&
HasState(blink::WebAXStateFocusable) &&
GetHtmlAttribute("placeholder", &placeholder)) {
if (name().empty() && !title_elem_id) {
set_name(placeholder);
} else if (description.empty()) {
description = placeholder;
}
}
SetStringAttribute(AccessibilityNodeData::ATTR_DESCRIPTION, description);
SetStringAttribute(AccessibilityNodeData::ATTR_HELP, help);
// On Windows, the value of a document should be its url.
if (blink_role() == blink::WebAXRoleRootWebArea ||
blink_role() == blink::WebAXRoleWebArea) {
set_value(GetStringAttribute(AccessibilityNodeData::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() &&
(blink_role() == blink::WebAXRoleListBoxOption ||
blink_role() == blink::WebAXRoleStaticText ||
blink_role() == blink::WebAXRoleListMarker)) {
std::string tmp = value();
set_value(name());
set_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))
set_value(GetStringAttribute(AccessibilityNodeData::ATTR_URL));
// 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);
}
}
void BrowserAccessibilityWin::PostInitialize() {
BrowserAccessibility::PostInitialize();
// Construct the hypertext for this node.
hyperlink_offset_to_index_.clear();
hyperlinks_.clear();
hypertext_.clear();
for (unsigned int i = 0; i < PlatformChildCount(); ++i) {
BrowserAccessibility* child = PlatformGetChild(i);
if (child->role() == blink::WebAXRoleStaticText) {
hypertext_ += UTF8ToUTF16(child->name());
} else {
hyperlink_offset_to_index_[hypertext_.size()] = hyperlinks_.size();
hypertext_ += kEmbeddedCharacter;
hyperlinks_.push_back(i);
}
}
DCHECK_EQ(hyperlink_offset_to_index_.size(), hyperlinks_.size());
// Fire an event when an alert first appears.
if (blink_role() == blink::WebAXRoleAlert && first_time_)
manager()->NotifyAccessibilityEvent(blink::WebAXEventAlert, this);
// Fire events if text has changed.
base::string16 text = TextForIAccessibleText();
if (previous_text_ != text) {
if (!previous_text_.empty() && !text.empty()) {
manager()->NotifyAccessibilityEvent(
blink::WebAXEventShow, this);
}
// TODO(dmazzoni): Look into HIDE events, too.
old_text_ = previous_text_;
previous_text_ = text;
}
BrowserAccessibilityManagerWin* manager =
this->manager()->ToBrowserAccessibilityManagerWin();
// Fire events if the state has changed.
if (!first_time_ && ia_state_ != old_ia_state_) {
// 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 (blink_role() == blink::WebAXRoleListBoxOption &&
(ia_state_ & STATE_SYSTEM_FOCUSABLE) &&
(ia_state_ & STATE_SYSTEM_SELECTABLE) &&
(ia_state_ & STATE_SYSTEM_FOCUSED) &&
!(old_ia_state_ & STATE_SYSTEM_FOCUSED)) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_FOCUS, unique_id_win());
}
if ((ia_state_ & STATE_SYSTEM_SELECTED) &&
!(old_ia_state_ & STATE_SYSTEM_SELECTED)) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_SELECTIONADD,
unique_id_win());
} else if (!(ia_state_ & STATE_SYSTEM_SELECTED) &&
(old_ia_state_ & STATE_SYSTEM_SELECTED)) {
manager->MaybeCallNotifyWinEvent(EVENT_OBJECT_SELECTIONREMOVE,
unique_id_win());
}
old_ia_state_ = ia_state_;
}
// Fire an event if this container object has scrolled.
int sx = 0;
int sy = 0;
if (GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_X, &sx) &&
GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_Y, &sy)) {
if (!first_time_ &&
(sx != previous_scroll_x_ || sy != previous_scroll_y_)) {
manager->MaybeCallNotifyWinEvent(EVENT_SYSTEM_SCROLLINGEND,
unique_id_win());
}
previous_scroll_x_ = sx;
previous_scroll_y_ = sy;
}
first_time_ = false;
}
void BrowserAccessibilityWin::NativeAddReference() {
AddRef();
}
void BrowserAccessibilityWin::NativeReleaseReference() {
Release();
}
bool BrowserAccessibilityWin::IsNative() const {
return true;
}
void BrowserAccessibilityWin::SetLocation(const gfx::Rect& new_location) {
BrowserAccessibility::SetLocation(new_location);
manager()->ToBrowserAccessibilityManagerWin()->MaybeCallNotifyWinEvent(
EVENT_OBJECT_LOCATIONCHANGE, unique_id_win());
}
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(
AccessibilityNodeData::StringAttribute 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(
AccessibilityNodeData::StringAttribute attribute,
const char* ia2_attr) {
base::string16 value;
if (GetString16Attribute(attribute, &value))
ia2_attributes_.push_back(ASCIIToUTF16(ia2_attr) + L":" + value);
}
void BrowserAccessibilityWin::BoolAttributeToIA2(
AccessibilityNodeData::BoolAttribute attribute,
const char* ia2_attr) {
bool value;
if (GetBoolAttribute(attribute, &value)) {
ia2_attributes_.push_back((ASCIIToUTF16(ia2_attr) + L":") +
(value ? L"true" : L"false"));
}
}
void BrowserAccessibilityWin::IntAttributeToIA2(
AccessibilityNodeData::IntAttribute attribute,
const char* ia2_attr) {
int value;
if (GetIntAttribute(attribute, &value)) {
ia2_attributes_.push_back(ASCIIToUTF16(ia2_attr) + L":" +
base::IntToString16(value));
}
}
base::string16 BrowserAccessibilityWin::GetValueText() {
float fval;
base::string16 value = UTF8ToUTF16(this->value());
if (value.empty() &&
GetFloatAttribute(AccessibilityNodeData::ATTR_VALUE_FOR_RANGE, &fval)) {
value = UTF8ToUTF16(base::DoubleToString(fval));
}
return value;
}
base::string16 BrowserAccessibilityWin::TextForIAccessibleText() {
if (IsEditableText())
return UTF8ToUTF16(value());
return (blink_role() == blink::WebAXRoleStaticText) ?
UTF8ToUTF16(name()) : hypertext_;
}
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(
AccessibilityNodeData::ATTR_LINE_BREAKS);
return ui::FindAccessibleTextBoundary(
text, line_breaks, boundary, start_offset, direction);
}
BrowserAccessibilityWin* BrowserAccessibilityWin::GetFromRendererID(
int32 renderer_id) {
return manager()->GetFromRendererID(renderer_id)->ToBrowserAccessibilityWin();
}
void BrowserAccessibilityWin::InitRoleAndState() {
ia_state_ = 0;
ia2_state_ = IA2_STATE_OPAQUE;
ia2_attributes_.clear();
if (HasState(blink::WebAXStateBusy))
ia_state_ |= STATE_SYSTEM_BUSY;
if (HasState(blink::WebAXStateChecked))
ia_state_ |= STATE_SYSTEM_CHECKED;
if (HasState(blink::WebAXStateCollapsed))
ia_state_ |= STATE_SYSTEM_COLLAPSED;
if (HasState(blink::WebAXStateExpanded))
ia_state_ |= STATE_SYSTEM_EXPANDED;
if (HasState(blink::WebAXStateFocusable))
ia_state_ |= STATE_SYSTEM_FOCUSABLE;
if (HasState(blink::WebAXStateHaspopup))
ia_state_ |= STATE_SYSTEM_HASPOPUP;
if (HasState(blink::WebAXStateHovered))
ia_state_ |= STATE_SYSTEM_HOTTRACKED;
if (HasState(blink::WebAXStateIndeterminate))
ia_state_ |= STATE_SYSTEM_INDETERMINATE;
if (HasState(blink::WebAXStateInvisible))
ia_state_ |= STATE_SYSTEM_INVISIBLE;
if (HasState(blink::WebAXStateLinked))
ia_state_ |= STATE_SYSTEM_LINKED;
if (HasState(blink::WebAXStateMultiselectable)) {
ia_state_ |= STATE_SYSTEM_EXTSELECTABLE;
ia_state_ |= STATE_SYSTEM_MULTISELECTABLE;
}
// TODO(ctguil): Support STATE_SYSTEM_EXTSELECTABLE/accSelect.
if (HasState(blink::WebAXStateOffscreen))
ia_state_ |= STATE_SYSTEM_OFFSCREEN;
if (HasState(blink::WebAXStatePressed))
ia_state_ |= STATE_SYSTEM_PRESSED;
if (HasState(blink::WebAXStateProtected))
ia_state_ |= STATE_SYSTEM_PROTECTED;
if (HasState(blink::WebAXStateRequired))
ia2_state_ |= IA2_STATE_REQUIRED;
if (HasState(blink::WebAXStateSelectable))
ia_state_ |= STATE_SYSTEM_SELECTABLE;
if (HasState(blink::WebAXStateSelected))
ia_state_ |= STATE_SYSTEM_SELECTED;
if (HasState(blink::WebAXStateVisited))
ia_state_ |= STATE_SYSTEM_TRAVERSED;
if (!HasState(blink::WebAXStateEnabled))
ia_state_ |= STATE_SYSTEM_UNAVAILABLE;
if (HasState(blink::WebAXStateVertical)) {
ia2_state_ |= IA2_STATE_VERTICAL;
} else {
ia2_state_ |= IA2_STATE_HORIZONTAL;
}
if (HasState(blink::WebAXStateVisited))
ia_state_ |= STATE_SYSTEM_TRAVERSED;
// 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(blink::WebAXStateReadonly))
ia2_state_ |= IA2_STATE_EDITABLE;
base::string16 invalid;
if (GetHtmlAttribute("aria-invalid", &invalid))
ia2_state_ |= IA2_STATE_INVALID_ENTRY;
if (GetBoolAttribute(AccessibilityNodeData::ATTR_BUTTON_MIXED))
ia_state_ |= STATE_SYSTEM_MIXED;
if (GetBoolAttribute(AccessibilityNodeData::ATTR_CAN_SET_VALUE))
ia2_state_ |= IA2_STATE_EDITABLE;
base::string16 html_tag = GetString16Attribute(
AccessibilityNodeData::ATTR_HTML_TAG);
ia_role_ = 0;
ia2_role_ = 0;
switch (blink_role()) {
case blink::WebAXRoleAlert:
ia_role_ = ROLE_SYSTEM_ALERT;
break;
case blink::WebAXRoleAlertDialog:
ia_role_ = ROLE_SYSTEM_DIALOG;
break;
case blink::WebAXRoleApplication:
ia_role_ = ROLE_SYSTEM_APPLICATION;
break;
case blink::WebAXRoleArticle:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_SECTION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleBusyIndicator:
ia_role_ = ROLE_SYSTEM_ANIMATION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleButton:
ia_role_ = ROLE_SYSTEM_PUSHBUTTON;
bool is_aria_pressed_defined;
bool is_mixed;
if (GetAriaTristate("aria-pressed", &is_aria_pressed_defined, &is_mixed))
ia_state_ |= STATE_SYSTEM_PRESSED;
if (is_aria_pressed_defined)
ia2_role_ = IA2_ROLE_TOGGLE_BUTTON;
if (is_mixed)
ia_state_ |= STATE_SYSTEM_MIXED;
break;
case blink::WebAXRoleCanvas:
if (GetBoolAttribute(AccessibilityNodeData::ATTR_CANVAS_HAS_FALLBACK)) {
role_name_ = L"canvas";
ia2_role_ = IA2_ROLE_CANVAS;
} else {
ia_role_ = ROLE_SYSTEM_GRAPHIC;
}
break;
case blink::WebAXRoleCell:
ia_role_ = ROLE_SYSTEM_CELL;
break;
case blink::WebAXRoleCheckBox:
ia_role_ = ROLE_SYSTEM_CHECKBUTTON;
break;
case blink::WebAXRoleColorWell:
ia_role_ = ROLE_SYSTEM_CLIENT;
ia2_role_ = IA2_ROLE_COLOR_CHOOSER;
break;
case blink::WebAXRoleColumn:
ia_role_ = ROLE_SYSTEM_COLUMN;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleColumnHeader:
ia_role_ = ROLE_SYSTEM_COLUMNHEADER;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleComboBox:
ia_role_ = ROLE_SYSTEM_COMBOBOX;
break;
case blink::WebAXRoleDiv:
role_name_ = L"div";
ia2_role_ = IA2_ROLE_SECTION;
break;
case blink::WebAXRoleDefinition:
role_name_ = html_tag;
ia2_role_ = IA2_ROLE_PARAGRAPH;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleDescriptionListDetail:
role_name_ = html_tag;
ia2_role_ = IA2_ROLE_PARAGRAPH;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleDescriptionListTerm:
ia_role_ = ROLE_SYSTEM_LISTITEM;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleDialog:
ia_role_ = ROLE_SYSTEM_DIALOG;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleDisclosureTriangle:
ia_role_ = ROLE_SYSTEM_OUTLINEBUTTON;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleDocument:
case blink::WebAXRoleRootWebArea:
case blink::WebAXRoleWebArea:
ia_role_ = ROLE_SYSTEM_DOCUMENT;
ia_state_ |= STATE_SYSTEM_READONLY;
ia_state_ |= STATE_SYSTEM_FOCUSABLE;
break;
case blink::WebAXRoleEditableText:
ia_role_ = ROLE_SYSTEM_TEXT;
ia2_state_ |= IA2_STATE_SINGLE_LINE;
ia2_state_ |= IA2_STATE_EDITABLE;
break;
case blink::WebAXRoleForm:
role_name_ = L"form";
ia2_role_ = IA2_ROLE_FORM;
break;
case blink::WebAXRoleFooter:
ia_role_ = IA2_ROLE_FOOTER;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleGrid:
ia_role_ = ROLE_SYSTEM_TABLE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleGroup: {
base::string16 aria_role = GetString16Attribute(
AccessibilityNodeData::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;
} else {
if (html_tag.empty())
role_name_ = L"div";
else
role_name_ = html_tag;
ia2_role_ = IA2_ROLE_SECTION;
}
ia_state_ |= STATE_SYSTEM_READONLY;
break;
}
case blink::WebAXRoleGrowArea:
ia_role_ = ROLE_SYSTEM_GRIP;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleHeading:
role_name_ = html_tag;
ia2_role_ = IA2_ROLE_HEADING;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleHorizontalRule:
ia_role_ = ROLE_SYSTEM_SEPARATOR;
break;
case blink::WebAXRoleImage:
ia_role_ = ROLE_SYSTEM_GRAPHIC;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleImageMap:
role_name_ = html_tag;
ia2_role_ = IA2_ROLE_IMAGE_MAP;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleImageMapLink:
ia_role_ = ROLE_SYSTEM_LINK;
ia_state_ |= STATE_SYSTEM_LINKED;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleLabel:
ia_role_ = ROLE_SYSTEM_TEXT;
ia2_role_ = IA2_ROLE_LABEL;
break;
case blink::WebAXRoleBanner:
case blink::WebAXRoleComplementary:
case blink::WebAXRoleContentInfo:
case blink::WebAXRoleMain:
case blink::WebAXRoleNavigation:
case blink::WebAXRoleSearch:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_SECTION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleLink:
ia_role_ = ROLE_SYSTEM_LINK;
ia_state_ |= STATE_SYSTEM_LINKED;
break;
case blink::WebAXRoleList:
ia_role_ = ROLE_SYSTEM_LIST;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleListBox:
ia_role_ = ROLE_SYSTEM_LIST;
break;
case blink::WebAXRoleListBoxOption:
ia_role_ = ROLE_SYSTEM_LISTITEM;
if (ia_state_ & STATE_SYSTEM_SELECTABLE) {
ia_state_ |= STATE_SYSTEM_FOCUSABLE;
if (HasState(blink::WebAXStateFocused))
ia_state_ |= STATE_SYSTEM_FOCUSED;
}
break;
case blink::WebAXRoleListItem:
ia_role_ = ROLE_SYSTEM_LISTITEM;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleListMarker:
ia_role_ = ROLE_SYSTEM_TEXT;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleMath:
ia_role_ = ROLE_SYSTEM_EQUATION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleMenu:
case blink::WebAXRoleMenuButton:
ia_role_ = ROLE_SYSTEM_MENUPOPUP;
break;
case blink::WebAXRoleMenuBar:
ia_role_ = ROLE_SYSTEM_MENUBAR;
break;
case blink::WebAXRoleMenuItem:
ia_role_ = ROLE_SYSTEM_MENUITEM;
break;
case blink::WebAXRoleMenuListPopup:
ia_role_ = ROLE_SYSTEM_CLIENT;
break;
case blink::WebAXRoleMenuListOption:
ia_role_ = ROLE_SYSTEM_LISTITEM;
if (ia_state_ & STATE_SYSTEM_SELECTABLE) {
ia_state_ |= STATE_SYSTEM_FOCUSABLE;
if (HasState(blink::WebAXStateFocused))
ia_state_ |= STATE_SYSTEM_FOCUSED;
}
break;
case blink::WebAXRoleNote:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_NOTE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleOutline:
ia_role_ = ROLE_SYSTEM_OUTLINE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleParagraph:
role_name_ = L"P";
ia2_role_ = IA2_ROLE_PARAGRAPH;
break;
case blink::WebAXRolePopUpButton:
if (html_tag == L"select") {
ia_role_ = ROLE_SYSTEM_COMBOBOX;
} else {
ia_role_ = ROLE_SYSTEM_BUTTONMENU;
}
break;
case blink::WebAXRoleProgressIndicator:
ia_role_ = ROLE_SYSTEM_PROGRESSBAR;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleRadioButton:
ia_role_ = ROLE_SYSTEM_RADIOBUTTON;
break;
case blink::WebAXRoleRadioGroup:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_SECTION;
break;
case blink::WebAXRoleRegion:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_SECTION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleRow:
ia_role_ = ROLE_SYSTEM_ROW;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleRowHeader:
ia_role_ = ROLE_SYSTEM_ROWHEADER;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleRuler:
ia_role_ = ROLE_SYSTEM_CLIENT;
ia2_role_ = IA2_ROLE_RULER;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleScrollArea:
ia_role_ = ROLE_SYSTEM_CLIENT;
ia2_role_ = IA2_ROLE_SCROLL_PANE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleScrollBar:
ia_role_ = ROLE_SYSTEM_SCROLLBAR;
break;
case blink::WebAXRoleSlider:
ia_role_ = ROLE_SYSTEM_SLIDER;
break;
case blink::WebAXRoleSpinButton:
ia_role_ = ROLE_SYSTEM_SPINBUTTON;
break;
case blink::WebAXRoleSpinButtonPart:
ia_role_ = ROLE_SYSTEM_PUSHBUTTON;
break;
case blink::WebAXRoleSplitGroup:
ia_role_ = ROLE_SYSTEM_CLIENT;
ia2_role_ = IA2_ROLE_SPLIT_PANE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleAnnotation:
case blink::WebAXRoleStaticText:
ia_role_ = ROLE_SYSTEM_TEXT;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleStatus:
ia_role_ = ROLE_SYSTEM_STATUSBAR;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleSplitter:
ia_role_ = ROLE_SYSTEM_SEPARATOR;
break;
case blink::WebAXRoleSVGRoot:
ia_role_ = ROLE_SYSTEM_GRAPHIC;
break;
case blink::WebAXRoleTab:
ia_role_ = ROLE_SYSTEM_PAGETAB;
break;
case blink::WebAXRoleTable: {
base::string16 aria_role = GetString16Attribute(
AccessibilityNodeData::ATTR_ROLE);
if (aria_role == L"treegrid") {
ia_role_ = ROLE_SYSTEM_OUTLINE;
} else {
ia_role_ = ROLE_SYSTEM_TABLE;
ia_state_ |= STATE_SYSTEM_READONLY;
}
break;
}
case blink::WebAXRoleTableHeaderContainer:
ia_role_ = ROLE_SYSTEM_GROUPING;
ia2_role_ = IA2_ROLE_SECTION;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleTabList:
ia_role_ = ROLE_SYSTEM_PAGETABLIST;
break;
case blink::WebAXRoleTabPanel:
ia_role_ = ROLE_SYSTEM_PROPERTYPAGE;
break;
case blink::WebAXRoleToggleButton:
ia_role_ = ROLE_SYSTEM_PUSHBUTTON;
ia2_role_ = IA2_ROLE_TOGGLE_BUTTON;
break;
case blink::WebAXRoleTextArea:
ia_role_ = ROLE_SYSTEM_TEXT;
ia2_state_ |= IA2_STATE_MULTI_LINE;
ia2_state_ |= IA2_STATE_EDITABLE;
ia2_state_ |= IA2_STATE_SELECTABLE_TEXT;
break;
case blink::WebAXRoleTextField:
ia_role_ = ROLE_SYSTEM_TEXT;
ia2_state_ |= IA2_STATE_SINGLE_LINE;
ia2_state_ |= IA2_STATE_EDITABLE;
ia2_state_ |= IA2_STATE_SELECTABLE_TEXT;
break;
case blink::WebAXRoleTimer:
ia_role_ = ROLE_SYSTEM_CLOCK;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleToolbar:
ia_role_ = ROLE_SYSTEM_TOOLBAR;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleUserInterfaceTooltip:
ia_role_ = ROLE_SYSTEM_TOOLTIP;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleTree:
ia_role_ = ROLE_SYSTEM_OUTLINE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleTreeGrid:
ia_role_ = ROLE_SYSTEM_OUTLINE;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleTreeItem:
ia_role_ = ROLE_SYSTEM_OUTLINEITEM;
ia_state_ |= STATE_SYSTEM_READONLY;
break;
case blink::WebAXRoleWindow:
ia_role_ = ROLE_SYSTEM_WINDOW;
break;
// TODO(dmazzoni): figure out the proper MSAA role for all of these.
case blink::WebAXRoleBrowser:
case blink::WebAXRoleDirectory:
case blink::WebAXRoleDrawer:
case blink::WebAXRoleHelpTag:
case blink::WebAXRoleIgnored:
case blink::WebAXRoleIncrementor:
case blink::WebAXRoleLog:
case blink::WebAXRoleMarquee:
case blink::WebAXRoleMatte:
case blink::WebAXRolePresentational:
case blink::WebAXRoleRulerMarker:
case blink::WebAXRoleSheet:
case blink::WebAXRoleSliderThumb:
case blink::WebAXRoleSystemWide:
case blink::WebAXRoleValueIndicator:
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(blink::WebAXStateFocusable) &&
ia_role_ != ROLE_SYSTEM_DOCUMENT) {
ia_state_ &= ~(STATE_SYSTEM_READONLY);
}
if (!HasState(blink::WebAXStateReadonly))
ia_state_ &= ~(STATE_SYSTEM_READONLY);
if (GetBoolAttribute(AccessibilityNodeData::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_;
}
} // namespace content