VBufStorage_fieldNode_t* GeckoVBufBackend_t::fillVBuf(IAccessible2* pacc,
VBufStorage_buffer_t* buffer, VBufStorage_controlFieldNode_t* parentNode, VBufStorage_fieldNode_t* previousNode,
IAccessibleTable* paccTable, IAccessibleTable2* paccTable2, long tableID,
bool ignoreInteractiveUnlabelledGraphics
) {
nhAssert(buffer); //buffer can't be NULL
nhAssert(!parentNode||buffer->isNodeInBuffer(parentNode)); //parent node must be in buffer
nhAssert(!previousNode||buffer->isNodeInBuffer(previousNode)); //Previous node must be in buffer
VBufStorage_fieldNode_t* tempNode;
//all IAccessible methods take a variant for childID, get one ready
VARIANT varChild;
varChild.vt=VT_I4;
varChild.lVal=0;
wostringstream s;
//get docHandle -- IAccessible2 windowHandle
int docHandle;
if(pacc->get_windowHandle((HWND*)&docHandle)!=S_OK) {
LOG_DEBUG(L"pacc->get_windowHandle failed");
return NULL;
}
docHandle=(int)findRealMozillaWindow((HWND)docHandle);
if(!docHandle) {
LOG_DEBUG(L"bad docHandle");
return NULL;
}
//Get ID -- IAccessible2 uniqueID
int ID;
if(pacc->get_uniqueID((long*)&ID)!=S_OK) {
LOG_DEBUG(L"pacc->get_uniqueID failed");
return NULL;
}
//Make sure that we don't already know about this object -- protect from loops
if(buffer->getControlFieldNodeWithIdentifier(docHandle,ID)) {
LOG_DEBUG(L"a node with this docHandle and ID already exists, returning NULL");
return NULL;
}
//Add this node to the buffer
parentNode=buffer->addControlFieldNode(parentNode,previousNode,docHandle,ID,TRUE);
nhAssert(parentNode); //new node must have been created
previousNode=NULL;
//Get role -- IAccessible2 role
long role=0;
BSTR roleString=NULL;
if(pacc->role(&role)!=S_OK)
role=IA2_ROLE_UNKNOWN;
VARIANT varRole;
VariantInit(&varRole);
if(role==0) {
if(pacc->get_accRole(varChild,&varRole)!=S_OK) {
LOG_DEBUG(L"accRole failed");
}
if(varRole.vt==VT_I4)
role=varRole.lVal;
else if(varRole.vt==VT_BSTR)
roleString=varRole.bstrVal;
}
//Add role as an attrib
if(roleString)
s<<roleString;
else
s<<role;
parentNode->addAttribute(L"IAccessible::role",s.str());
s.str(L"");
VariantClear(&varRole);
//get states -- IAccessible accState
VARIANT varState;
VariantInit(&varState);
if(pacc->get_accState(varChild,&varState)!=S_OK) {
LOG_DEBUG(L"pacc->get_accState returned "<<res);
varState.vt=VT_I4;
varState.lVal=0;
}
int states=varState.lVal;
VariantClear(&varState);
//Add each state that is on, as an attrib
for(int i=0;i<32;++i) {
int state=1<<i;
if(state&states) {
s<<L"IAccessible::state_"<<state;
parentNode->addAttribute(s.str(),L"1");
s.str(L"");
}
}
//get IA2States -- IAccessible2 states
AccessibleStates IA2States;
if(pacc->get_states(&IA2States)!=S_OK) {
LOG_DEBUG(L"pacc->get_states failed");
IA2States=0;
}
//Add each state that is on, as an attrib
for(int i=0;i<32;++i) {
int state=1<<i;
if(state&IA2States) {
s<<L"IAccessible2::state_"<<state;
parentNode->addAttribute(s.str(),L"1");
s.str(L"");
}
}
//get keyboardShortcut -- IAccessible accKeyboardShortcut;
BSTR keyboardShortcut;
if(pacc->get_accKeyboardShortcut(varChild,&keyboardShortcut)==S_OK) {
parentNode->addAttribute(L"keyboardShortcut",keyboardShortcut);
//Free keyboardShortcut string memory
SysFreeString(keyboardShortcut);
} else
parentNode->addAttribute(L"keyboardShortcut",L"");
//get IA2Attributes -- IAccessible2 attributes;
BSTR IA2Attributes;
map<wstring,wstring> IA2AttribsMap;
if(pacc->get_attributes(&IA2Attributes)==S_OK) {
IA2AttribsToMap(IA2Attributes,IA2AttribsMap);
SysFreeString(IA2Attributes);
// Add each IA2 attribute as an attrib.
for(map<wstring,wstring>::const_iterator it=IA2AttribsMap.begin();it!=IA2AttribsMap.end();++it) {
s<<L"IAccessible2::attribute_"<<it->first;
parentNode->addAttribute(s.str(),it->second);
s.str(L"");
}
} else
LOG_DEBUG(L"pacc->get_attributes failed");
map<wstring,wstring>::const_iterator IA2AttribsMapIt;
//Check IA2Attributes, and or the role etc to work out if this object is a block element
bool isBlockElement=TRUE;
if(IA2States&IA2_STATE_MULTI_LINE) {
// Multiline nodes should always be block.
isBlockElement=TRUE;
} else if((IA2AttribsMapIt=IA2AttribsMap.find(L"display"))!=IA2AttribsMap.end()) {
// If there is a display attribute, we can rely solely on this to determine whether this is a block element or not.
isBlockElement=(IA2AttribsMapIt->second!=L"inline"&&IA2AttribsMapIt->second!=L"inline-block");
} else if((IA2AttribsMapIt=IA2AttribsMap.find(L"formatting"))!=IA2AttribsMap.end()&&IA2AttribsMapIt->second==L"block") {
isBlockElement=TRUE;
} else if(role==ROLE_SYSTEM_TABLE||role==ROLE_SYSTEM_CELL||role==IA2_ROLE_SECTION||role==ROLE_SYSTEM_DOCUMENT||role==IA2_ROLE_INTERNAL_FRAME||role==IA2_ROLE_UNKNOWN||role==ROLE_SYSTEM_SEPARATOR) {
isBlockElement=TRUE;
} else {
isBlockElement=FALSE;
}
parentNode->isBlock=isBlockElement;
// force isHidden to True if this has an ARIA role of presentation but its focusble -- Gecko does not hide this itself.
if((states&STATE_SYSTEM_FOCUSABLE)&&parentNode->matchAttributes(ATTRLIST_ROLES, REGEX_PRESENTATION_ROLE)) {
parentNode->isHidden=true;
}
BSTR name=NULL;
if(pacc->get_accName(varChild,&name)!=S_OK)
name=NULL;
wstring description;
BSTR rawDesc=NULL;
if(pacc->get_accDescription(varChild,&rawDesc)==S_OK) {
if(this->hasEncodedAccDescription) {
if(wcsncmp(rawDesc,L"Description: ",13)==0)
description=&rawDesc[13];
} else
description=rawDesc;
parentNode->addAttribute(L"description",description);
SysFreeString(rawDesc);
}
wstring locale;
IA2Locale ia2Locale={0};
if(pacc->get_locale(&ia2Locale)==S_OK) {
if(ia2Locale.language) {
locale.append(ia2Locale.language);
SysFreeString(ia2Locale.language);
}
if(ia2Locale.country) {
if(!locale.empty()) {
locale.append(L"-");
locale.append(ia2Locale.country);
}
SysFreeString(ia2Locale.country);
}
if(ia2Locale.variant) {
SysFreeString(ia2Locale.variant);
}
}
long left=0, top=0, width=0, height=0;
if(pacc->accLocation(&left,&top,&width,&height,varChild)!=S_OK) {
LOG_DEBUG(L"Error getting accLocation");
}
// Whether this node is editable text.
bool isEditable = (role == ROLE_SYSTEM_TEXT && (states & STATE_SYSTEM_FOCUSABLE || states & STATE_SYSTEM_UNAVAILABLE)) || IA2States & IA2_STATE_EDITABLE;
// Whether this node is a link or inside a link.
int inLink = states & STATE_SYSTEM_LINKED;
// Whether this is the root node.
bool isRoot = ID == this->rootID;
// Whether this is an embedded application.
bool isEmbeddedApp = role == IA2_ROLE_EMBEDDED_OBJECT
|| (!isRoot && (role == ROLE_SYSTEM_APPLICATION || role == ROLE_SYSTEM_DIALOG));
// Whether this node is interactive.
// Certain objects are never interactive, even if other checks are true.
bool isNeverInteractive = parentNode->isHidden||(!isEditable && (isRoot || role == ROLE_SYSTEM_DOCUMENT || role == IA2_ROLE_INTERNAL_FRAME));
bool isInteractive = !isNeverInteractive && (isEditable || inLink || states & STATE_SYSTEM_FOCUSABLE || states & STATE_SYSTEM_UNAVAILABLE || isEmbeddedApp || role == ROLE_SYSTEM_EQUATION);
// We aren't finished calculating isInteractive yet; actions are handled below.
// Whether the name is the content of this node.
bool nameIsContent = isEmbeddedApp
|| role == ROLE_SYSTEM_LINK || role == ROLE_SYSTEM_PUSHBUTTON || role == IA2_ROLE_TOGGLE_BUTTON || role == ROLE_SYSTEM_MENUITEM || role == ROLE_SYSTEM_GRAPHIC || (role == ROLE_SYSTEM_TEXT && !isEditable) || role == IA2_ROLE_HEADING || role == ROLE_SYSTEM_PAGETAB || role == ROLE_SYSTEM_BUTTONMENU
|| ((role == ROLE_SYSTEM_CHECKBUTTON || role == ROLE_SYSTEM_RADIOBUTTON) && !isLabelVisible(pacc));
IAccessibleText* paccText=NULL;
IAccessibleHypertext* paccHypertext=NULL;
//get IAccessibleText interface
pacc->QueryInterface(IID_IAccessibleText,(void**)&paccText);
//Get IAccessibleHypertext interface
pacc->QueryInterface(IID_IAccessibleHypertext,(void**)&paccHypertext);
//Get the text from the IAccessibleText interface
BSTR IA2Text=NULL;
int IA2TextLength=0;
if (paccText && paccText->get_text(0, IA2_TEXT_OFFSET_LENGTH, &IA2Text) == S_OK && IA2Text)
IA2TextLength=SysStringLen(IA2Text);
// Determine whether the text is extraneous whitespace.
bool IA2TextIsUnneededSpace=true;
// Whitespace isn't extraneous in editable controls.
if (IA2TextLength > 0 && !isEditable) {
for(int i=0;i<IA2TextLength;++i) {
if(IA2Text[i]==L'\n'||IA2Text[i]==L'\xfffc'||!iswspace(IA2Text[i])) {
IA2TextIsUnneededSpace=false;
break;
}
}
} else
IA2TextIsUnneededSpace=false;
// Whether a node is visible.
// An invisible node should not be rendered, but will have a presence in the buffer.
bool isVisible = true;
// Whether to render children, including text content.
// Note that we may still render the name, value, etc. even if we don't render children.
bool renderChildren = true;
long childCount=0;
if ((IA2AttribsMapIt = IA2AttribsMap.find(L"hidden")) != IA2AttribsMap.end() && IA2AttribsMapIt->second == L"true") {
// aria-hidden
isVisible = false;
} else {
isVisible = width > 0 && height > 0;
if (IA2TextIsUnneededSpace
|| role == ROLE_SYSTEM_COMBOBOX
|| (role == ROLE_SYSTEM_LIST && !(states & STATE_SYSTEM_READONLY))
|| isEmbeddedApp
|| role == ROLE_SYSTEM_OUTLINE
|| role == ROLE_SYSTEM_EQUATION
|| (nameIsContent && (IA2AttribsMapIt = IA2AttribsMap.find(L"explicit-name")) != IA2AttribsMap.end() && IA2AttribsMapIt->second == L"true")
)
renderChildren = false;
if(pacc->get_accChildCount(&childCount)==S_OK) {
if (childCount > 0) {
// If a node has children, it's visible.
isVisible = true;
}
} else
childCount=0;
}
//Expose all available actions
IAccessibleAction* paccAction=NULL;
pacc->QueryInterface(IID_IAccessibleAction,(void**)&paccAction);
if(paccAction) {
long nActions=0;
paccAction->nActions(&nActions);
for(int i=0;i<nActions;++i) {
BSTR actionName=NULL;
paccAction->get_name(i,&actionName);
if(actionName) {
wstring attribName=L"IAccessibleAction_";
attribName+=actionName;
s<<i;
parentNode->addAttribute(attribName,s.str());
s.str(L"");
if(!isNeverInteractive&&(wcscmp(actionName, L"click")==0||wcscmp(actionName, L"showlongdesc")==0)) {
isInteractive=true;
}
SysFreeString(actionName);
}
}
paccAction->Release();
}
// Handle table cell information.
IAccessibleTableCell* paccTableCell = NULL;
// For IAccessibleTable, we must always be passed the table interface by the caller.
// For IAccessibleTable2, we can always obtain the cell interface,
// which allows us to handle updates to table cells.
if (
pacc->QueryInterface(IID_IAccessibleTableCell, (void**)&paccTableCell) == S_OK || // IAccessibleTable2
(paccTable && (IA2AttribsMapIt = IA2AttribsMap.find(L"table-cell-index")) != IA2AttribsMap.end()) // IAccessibleTable
) {
if (paccTableCell) {
// IAccessibleTable2
this->fillTableCellInfo_IATable2(parentNode, paccTableCell);
if (!paccTable2) {
// This is an update; we're not rendering the entire table.
tableID = updateTableCounts(paccTableCell, this);
}
paccTableCell->Release();
paccTableCell = NULL;
} else // IAccessibleTable
fillTableCellInfo_IATable(parentNode, paccTable, IA2AttribsMapIt->second);
// tableID is the IAccessible2::uniqueID for paccTable.
s << tableID;
parentNode->addAttribute(L"table-id", s.str());
s.str(L"");
// We're now within a cell, so descendant nodes shouldn't refer to this table anymore.
paccTable = NULL;
paccTable2 = NULL;
tableID = 0;
}
// Handle table information.
// Don't release the table unless it was created in this call.
bool releaseTable = false;
// If paccTable is not NULL, we're within a table but not yet within a cell, so don't bother to query for table info.
if (!paccTable2 && !paccTable) {
// Try to get table information.
pacc->QueryInterface(IID_IAccessibleTable2,(void**)&paccTable2);
if(!paccTable2)
pacc->QueryInterface(IID_IAccessibleTable,(void**)&paccTable);
if (paccTable2||paccTable) {
// We did the QueryInterface for paccTable, so we must release it after all calls that use it are done.
releaseTable = true;
// This is a table, so add its information as attributes.
if((IA2AttribsMapIt = IA2AttribsMap.find(L"layout-guess")) != IA2AttribsMap.end())
parentNode->addAttribute(L"table-layout",L"1");
tableID = ID;
s << ID;
parentNode->addAttribute(L"table-id", s.str());
s.str(L"");
if(paccTable2)
fillTableCounts<IAccessibleTable2>(parentNode, pacc, paccTable2);
else
fillTableCounts<IAccessibleTable>(parentNode, pacc, paccTable);
// Add the table summary if one is present and the table is visible.
if (isVisible &&
(!description.empty() && (tempNode = buffer->addTextFieldNode(parentNode, previousNode, description))) ||
// If there is no caption, the summary (if any) is the name.
// There is no caption if the label isn't visible.
(name && !isLabelVisible(pacc) && (tempNode = buffer->addTextFieldNode(parentNode, previousNode, name)))
) {
if(!locale.empty()) tempNode->addAttribute(L"language",locale);
previousNode = tempNode;
}
}
}
BSTR value=NULL;
if(pacc->get_accValue(varChild,&value)==S_OK) {
if(value&&SysStringLen(value)==0) {
SysFreeString(value);
value=NULL;
}
}
//If the name isn't being rendered as the content, then add the name as a field attribute.
if (!nameIsContent && name)
parentNode->addAttribute(L"name", name);
if (isVisible) {
if (role==ROLE_SYSTEM_GRAPHIC&&childCount>0&&name) {
// This is an image map with a name. Render the name first.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,name);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
if (isInteractive && !ignoreInteractiveUnlabelledGraphics) {
// Don't render interactive unlabelled graphic descendants if this node has a name,
// as author supplied names are preferred.
ignoreInteractiveUnlabelledGraphics = name != NULL;
}
if (renderChildren && IA2TextLength > 0) {
// Process IAccessibleText.
int chunkStart=0;
long attribsStart = 0;
long attribsEnd = 0;
map<wstring,wstring> textAttribs;
for(int i=0;;++i) {
if(i!=chunkStart&&(i==IA2TextLength||i==attribsEnd||IA2Text[i]==0xfffc)) {
// We've reached the end of the current chunk of text.
// (A chunk ends at the end of the text, at the end of an attributes run
// or at an embedded object char.)
// Add the chunk to the buffer.
if(tempNode=buffer->addTextFieldNode(parentNode,previousNode,wstring(IA2Text+chunkStart,i-chunkStart))) {
previousNode=tempNode;
// Add text attributes.
for(map<wstring,wstring>::const_iterator it=textAttribs.begin();it!=textAttribs.end();++it)
previousNode->addAttribute(it->first,it->second);
#define copyObjectAttribute(attr) if ((IA2AttribsMapIt = IA2AttribsMap.find(attr)) != IA2AttribsMap.end()) \
previousNode->addAttribute(attr, IA2AttribsMapIt->second);
copyObjectAttribute(L"text-align");
#undef copyObjectAttribute
}
}
if(i==IA2TextLength)
break;
if(i==attribsEnd) {
// We've hit the end of the last attributes run and thus the start of the next.
textAttribs.clear();
chunkStart=i;
BSTR attribsStr;
if(paccText->get_attributes(attribsEnd,&attribsStart,&attribsEnd,&attribsStr)==S_OK) {
if(attribsStr) {
IA2AttribsToMap(attribsStr,textAttribs);
SysFreeString(attribsStr);
}
} else {
// If attributes fails, assume it'll fail for the entire text.
attribsEnd=IA2TextLength;
}
}
if(paccHypertext&&IA2Text[i]==0xfffc) {
// Embedded object char.
// The next chunk of text shouldn't include this char.
chunkStart=i+1;
long hyperlinkIndex;
if(paccHypertext->get_hyperlinkIndex(i,&hyperlinkIndex)!=S_OK)
continue;
IAccessibleHyperlink* paccHyperlink=NULL;
if(paccHypertext->get_hyperlink(hyperlinkIndex,&paccHyperlink)!=S_OK)
continue;
IAccessible2* childPacc=NULL;
if(paccHyperlink->QueryInterface(IID_IAccessible2,(void**)&childPacc)!=S_OK) {
paccHyperlink->Release();
continue;
}
paccHyperlink->Release();
if (tempNode = this->fillVBuf(childPacc, buffer, parentNode, previousNode, paccTable, paccTable2, tableID, ignoreInteractiveUnlabelledGraphics)) {
previousNode=tempNode;
} else {
LOG_DEBUG(L"Error in fillVBuf");
}
childPacc->Release();
}
}
} else if (renderChildren && childCount > 0) {
// The object has no text, but we do want to render its children.
VARIANT* varChildren;
if(!(varChildren=(VARIANT*)malloc(sizeof(VARIANT)*childCount))) {
LOG_DEBUG(L"Error allocating varChildren memory");
return NULL;
}
if(AccessibleChildren(pacc,0,childCount,varChildren,&childCount)!=S_OK) {
LOG_DEBUG(L"AccessibleChildren failed");
childCount=0;
}
for(long i=0;i<childCount;++i) {
if (varChildren[i].vt != VT_DISPATCH) {
VariantClear(&(varChildren[i]));
continue;
}
IAccessible2* childPacc=NULL;
if(varChildren[i].pdispVal) varChildren[i].pdispVal->QueryInterface(IID_IAccessible2,(void**)&childPacc);
if (!childPacc) {
VariantClear(&(varChildren[i]));
continue;
}
if (tempNode = this->fillVBuf(childPacc, buffer, parentNode, previousNode, paccTable, paccTable2, tableID, ignoreInteractiveUnlabelledGraphics))
previousNode=tempNode;
else
LOG_DEBUG(L"Error in calling fillVBuf");
childPacc->Release();
VariantClear(&(varChildren[i]));
}
free(varChildren);
} else {
// There were no children to render.
if(role==ROLE_SYSTEM_GRAPHIC) {
if (name && name[0]) {
// The graphic has a label, so use it.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,name);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
} else if ((name && !name[0]) || ignoreInteractiveUnlabelledGraphics) {
// alt="" or we've determined that all unlabelled graphics should be ignored,
// so don't render the graphic at all.
isInteractive = false;
} else if (isInteractive) {
// The graphic is unlabelled, but we should try to derive a name for it.
if (inLink && value) {
// derive the label from the link URL.
previousNode = buffer->addTextFieldNode(parentNode, previousNode, getNameForURL(value));
} else if ((IA2AttribsMapIt = IA2AttribsMap.find(L"src")) != IA2AttribsMap.end()) {
// Derive the label from the graphic URL.
previousNode = buffer->addTextFieldNode(parentNode, previousNode, getNameForURL(IA2AttribsMap[L"src"]));
}
}
} else if (!nameIsContent && value) {
previousNode=buffer->addTextFieldNode(parentNode,previousNode,value);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
}
if ((nameIsContent || role == IA2_ROLE_SECTION || role == IA2_ROLE_TEXT_FRAME) && !nodeHasUsefulContent(parentNode)) {
// If there is no useful content and the name can be the content,
// render the name if there is one.
if(name) {
tempNode = buffer->addTextFieldNode(parentNode, NULL, name);
if(tempNode && !locale.empty()) tempNode->addAttribute(L"language", locale);
} else if(role==ROLE_SYSTEM_LINK&&value) {
// If a link has no name, derive it from the URL.
buffer->addTextFieldNode(parentNode, NULL, getNameForURL(value));
}
}
if ((role == ROLE_SYSTEM_CELL || role == ROLE_SYSTEM_ROWHEADER || role == ROLE_SYSTEM_COLUMNHEADER||role==IA2_ROLE_UNKNOWN) && parentNode->getLength() == 0) {
// Always render a space for empty table cells and unknowns.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,L" ");
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
parentNode->isBlock=false;
}
if ((isInteractive || role == ROLE_SYSTEM_SEPARATOR) && parentNode->getLength() == 0) {
// If the node is interactive or otherwise relevant even when empty
// and it still has no content, render a space so the user can access the node.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,L" ");
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
}
// Clean up.
if(name)
SysFreeString(name);
if(value)
SysFreeString(value);
if (IA2Text)
SysFreeString(IA2Text);
if(paccText)
paccText->Release();
if(paccHypertext)
paccHypertext->Release();
if (releaseTable) {
if(paccTable2)
paccTable2->Release();
else
paccTable->Release();
}
return parentNode;
}
VBufStorage_fieldNode_t* GeckoVBufBackend_t::fillVBuf(IAccessible2* pacc,
VBufStorage_buffer_t* buffer, VBufStorage_controlFieldNode_t* parentNode, VBufStorage_fieldNode_t* previousNode,
IAccessibleTable* paccTable, IAccessibleTable2* paccTable2, long tableID, const wchar_t* parentPresentationalRowNumber,
bool ignoreInteractiveUnlabelledGraphics
) {
nhAssert(buffer); //buffer can't be NULL
nhAssert(!parentNode||buffer->isNodeInBuffer(parentNode)); //parent node must be in buffer
nhAssert(!previousNode||buffer->isNodeInBuffer(previousNode)); //Previous node must be in buffer
VBufStorage_fieldNode_t* tempNode;
//all IAccessible methods take a variant for childID, get one ready
VARIANT varChild;
varChild.vt=VT_I4;
varChild.lVal=0;
wostringstream s;
//get docHandle -- IAccessible2 windowHandle
HWND docHwnd;
if(pacc->get_windowHandle(&docHwnd)!=S_OK) {
LOG_DEBUG(L"pacc->get_windowHandle failed");
return NULL;
}
const int docHandle=HandleToUlong(findRealMozillaWindow(docHwnd));
if(!docHandle) {
LOG_DEBUG(L"bad docHandle");
return NULL;
}
//Get ID -- IAccessible2 uniqueID
int ID;
if(pacc->get_uniqueID((long*)&ID)!=S_OK) {
LOG_DEBUG(L"pacc->get_uniqueID failed");
return NULL;
}
//Make sure that we don't already know about this object -- protect from loops
if(buffer->getControlFieldNodeWithIdentifier(docHandle,ID)) {
LOG_DEBUG(L"a node with this docHandle and ID already exists, returning NULL");
return NULL;
}
if(buffer!=this&&parentNode) {
// We are rendering a subtree of a temp buffer
auto existingNode=this->reuseExistingNodeInRender(parentNode,previousNode,docHandle,ID);
if(existingNode) {
// This child already exists on the backend, we can reuse it.
return buffer->addReferenceNodeToBuffer(parentNode,previousNode,existingNode);
}
}
//Add this node to the buffer
parentNode=buffer->addControlFieldNode(parentNode,previousNode,docHandle,ID,TRUE);
nhAssert(parentNode); //new node must have been created
previousNode=NULL;
//Get role -- IAccessible2 role
long role=0;
BSTR roleString=NULL;
if(pacc->role(&role)!=S_OK)
role=IA2_ROLE_UNKNOWN;
VARIANT varRole;
VariantInit(&varRole);
if(role==0) {
if(pacc->get_accRole(varChild,&varRole)!=S_OK) {
LOG_DEBUG(L"accRole failed");
}
if(varRole.vt==VT_I4)
role=varRole.lVal;
else if(varRole.vt==VT_BSTR)
roleString=varRole.bstrVal;
}
//Add role as an attrib
if(roleString)
s<<roleString;
else
s<<role;
parentNode->addAttribute(L"IAccessible::role",s.str());
s.str(L"");
VariantClear(&varRole);
//get states -- IAccessible accState
VARIANT varState;
VariantInit(&varState);
if(pacc->get_accState(varChild,&varState)!=S_OK) {
LOG_DEBUG(L"pacc->get_accState failed");
varState.vt=VT_I4;
varState.lVal=0;
}
int states=varState.lVal;
VariantClear(&varState);
//Add each state that is on, as an attrib
for(int i=0;i<32;++i) {
int state=1<<i;
if(state&states) {
s<<L"IAccessible::state_"<<state;
parentNode->addAttribute(s.str(),L"1");
s.str(L"");
}
}
//get IA2States -- IAccessible2 states
AccessibleStates IA2States;
if(pacc->get_states(&IA2States)!=S_OK) {
LOG_DEBUG(L"pacc->get_states failed");
IA2States=0;
}
// Remove state_editible from tables as Gecko exposes it for ARIA grids which is not in the ARIA spec.
if(IA2States&IA2_STATE_EDITABLE&&role==ROLE_SYSTEM_TABLE) {
IA2States-=IA2_STATE_EDITABLE;
}
//Add each state that is on, as an attrib
for(int i=0;i<32;++i) {
int state=1<<i;
if(state&IA2States) {
s<<L"IAccessible2::state_"<<state;
parentNode->addAttribute(s.str(),L"1");
s.str(L"");
}
}
//get keyboardShortcut -- IAccessible accKeyboardShortcut;
BSTR keyboardShortcut;
if(pacc->get_accKeyboardShortcut(varChild,&keyboardShortcut)==S_OK) {
parentNode->addAttribute(L"keyboardShortcut",keyboardShortcut);
//Free keyboardShortcut string memory
SysFreeString(keyboardShortcut);
} else
parentNode->addAttribute(L"keyboardShortcut",L"");
//get IA2Attributes -- IAccessible2 attributes;
BSTR IA2Attributes;
map<wstring,wstring> IA2AttribsMap;
if(pacc->get_attributes(&IA2Attributes)==S_OK) {
IA2AttribsToMap(IA2Attributes,IA2AttribsMap);
SysFreeString(IA2Attributes);
// Add each IA2 attribute as an attrib.
for(map<wstring,wstring>::const_iterator it=IA2AttribsMap.begin();it!=IA2AttribsMap.end();++it) {
s<<L"IAccessible2::attribute_"<<it->first;
parentNode->addAttribute(s.str(),it->second);
s.str(L"");
}
} else
LOG_DEBUG(L"pacc->get_attributes failed");
map<wstring,wstring>::const_iterator IA2AttribsMapIt;
//Check IA2Attributes, and or the role etc to work out if this object is a block element
bool isBlockElement=TRUE;
if(IA2States&IA2_STATE_MULTI_LINE) {
// Multiline nodes should always be block.
isBlockElement=TRUE;
} else if((IA2AttribsMapIt=IA2AttribsMap.find(L"display"))!=IA2AttribsMap.end()) {
// If there is a display attribute, we can rely solely on this to determine whether this is a block element or not.
isBlockElement=(IA2AttribsMapIt->second!=L"inline"&&IA2AttribsMapIt->second!=L"inline-block");
} else if((IA2AttribsMapIt=IA2AttribsMap.find(L"formatting"))!=IA2AttribsMap.end()&&IA2AttribsMapIt->second==L"block") {
isBlockElement=TRUE;
} else if(role==ROLE_SYSTEM_TABLE||role==ROLE_SYSTEM_CELL||role==IA2_ROLE_SECTION||role==ROLE_SYSTEM_DOCUMENT||role==IA2_ROLE_INTERNAL_FRAME||role==IA2_ROLE_UNKNOWN||role==ROLE_SYSTEM_SEPARATOR) {
isBlockElement=TRUE;
} else {
isBlockElement=FALSE;
}
parentNode->isBlock=isBlockElement;
// force isHidden to True if this has an ARIA role of presentation but its focusble -- Gecko does not hide this itself.
if((states&STATE_SYSTEM_FOCUSABLE)&&parentNode->matchAttributes(ATTRLIST_ROLES, REGEX_PRESENTATION_ROLE)) {
parentNode->isHidden=true;
}
BSTR name=NULL;
if(pacc->get_accName(varChild,&name)!=S_OK)
name=NULL;
wstring description;
BSTR rawDesc=NULL;
if(pacc->get_accDescription(varChild,&rawDesc)==S_OK) {
if(this->hasEncodedAccDescription) {
if(wcsncmp(rawDesc,L"Description: ",13)==0)
description=&rawDesc[13];
} else
description=rawDesc;
parentNode->addAttribute(L"description",description);
SysFreeString(rawDesc);
}
wstring locale;
IA2Locale ia2Locale={0};
if(pacc->get_locale(&ia2Locale)==S_OK) {
if(ia2Locale.language) {
locale.append(ia2Locale.language);
SysFreeString(ia2Locale.language);
}
if(ia2Locale.country) {
if(!locale.empty()) {
locale.append(L"-");
locale.append(ia2Locale.country);
}
SysFreeString(ia2Locale.country);
}
if(ia2Locale.variant) {
SysFreeString(ia2Locale.variant);
}
}
long left=0, top=0, width=0, height=0;
if(pacc->accLocation(&left,&top,&width,&height,varChild)!=S_OK) {
LOG_DEBUG(L"Error getting accLocation");
}
// Whether this node is editable text.
bool isEditable = (role == ROLE_SYSTEM_TEXT && (states & STATE_SYSTEM_FOCUSABLE || states & STATE_SYSTEM_UNAVAILABLE)) || IA2States & IA2_STATE_EDITABLE;
// Whether this node is a link or inside a link.
int inLink = states & STATE_SYSTEM_LINKED;
// Whether this is the root node.
bool isRoot = ID == this->rootID;
// Whether this is an embedded application.
bool isEmbeddedApp = role == IA2_ROLE_EMBEDDED_OBJECT
|| (!isRoot && (role == ROLE_SYSTEM_APPLICATION || role == ROLE_SYSTEM_DIALOG));
// Whether this node is interactive.
// Certain objects are never interactive, even if other checks are true.
bool isNeverInteractive = parentNode->isHidden||(!isEditable && (isRoot || role == ROLE_SYSTEM_DOCUMENT || role == IA2_ROLE_INTERNAL_FRAME));
bool isInteractive = !isNeverInteractive && (isEditable || inLink || states & STATE_SYSTEM_FOCUSABLE || states & STATE_SYSTEM_UNAVAILABLE || isEmbeddedApp || role == ROLE_SYSTEM_EQUATION);
// We aren't finished calculating isInteractive yet; actions are handled below.
const bool isAriaHidden = hasAriaHiddenAttribute(IA2AttribsMap);
const long childCount = getChildCount(isAriaHidden, pacc);
const bool isImgMap = role == ROLE_SYSTEM_GRAPHIC && childCount > 0;
IA2AttribsMapIt = IA2AttribsMap.find(L"explicit-name");
// Whether the name of this node has been explicitly set (as opposed to calculated by descendant)
const bool nameIsExplicit = IA2AttribsMapIt != IA2AttribsMap.end() && IA2AttribsMapIt->second == L"true";
// Whether the name is the content of this node.
std::experimental::optional<bool> isLabelVisibleVal_;
// A version of the isLabelVisible function that caches its result
auto isLabelVisibleCached=[&]() {
if(!isLabelVisibleVal_) {
isLabelVisibleVal_=isLabelVisible(pacc);
}
return *isLabelVisibleVal_;
};
const bool nameIsContent = isEmbeddedApp
|| role == ROLE_SYSTEM_LINK
|| role == ROLE_SYSTEM_PUSHBUTTON
|| role == IA2_ROLE_TOGGLE_BUTTON
|| role == ROLE_SYSTEM_MENUITEM
|| (role == ROLE_SYSTEM_GRAPHIC && !isImgMap)
|| (role == ROLE_SYSTEM_TEXT && !isEditable)
|| role == IA2_ROLE_HEADING
|| role == ROLE_SYSTEM_PAGETAB
|| role == ROLE_SYSTEM_BUTTONMENU
|| ((role == ROLE_SYSTEM_CHECKBUTTON || role == ROLE_SYSTEM_RADIOBUTTON) && !isLabelVisibleCached());
// Whether this node has a visible label somewhere else in the tree
const bool labelVisible = nameIsExplicit && name && name[0] //this node must actually have an explicit name, and not be just an empty string
&&(!nameIsContent||role==ROLE_SYSTEM_TABLE) // We only need to know if the name won't be used as content or if it is a table (for table summary)
&&isLabelVisibleCached(); // actually do the check
// If the node is explicitly labeled for accessibility, and we haven't used the label as the node's content, and the label does not visibly appear anywhere else in the tree (E.g. aria-label on an edit field)
// then ensure that the label is always reported along withe the node
// We must exclude tables from this though as table summaries / captions are handled very specifically
if(nameIsExplicit && !nameIsContent && (role != ROLE_SYSTEM_TABLE) && !labelVisible) {
parentNode->addAttribute(L"alwaysReportName",L"true");
}
IAccessibleText* paccText=NULL;
//get IAccessibleText interface
pacc->QueryInterface(IID_IAccessibleText,(void**)&paccText);
//Get the text from the IAccessibleText interface
BSTR IA2Text=NULL;
int IA2TextLength=0;
if (paccText && paccText->get_text(0, IA2_TEXT_OFFSET_LENGTH, &IA2Text) == S_OK && IA2Text)
IA2TextLength=SysStringLen(IA2Text);
// Determine whether the text is extraneous whitespace.
bool IA2TextIsUnneededSpace=true;
// Whitespace isn't extraneous in editable controls.
if (IA2TextLength > 0 && !isEditable) {
for(int i=0;i<IA2TextLength;++i) {
if(IA2Text[i]==L'\n'||IA2Text[i]==L'\xfffc'||!iswspace(IA2Text[i])) {
IA2TextIsUnneededSpace=false;
break;
}
}
} else
IA2TextIsUnneededSpace=false;
// Whether a node is visible.
// An invisible node should not be rendered, but will have a presence in the buffer.
bool isVisible = true;
// Whether to render children, including text content.
// Note that we may still render the name, value, etc. even if we don't render children.
bool renderChildren = true;
// Whether this is a selection container for which only the selected item should be rendered;
// currently, list boxes and trees.
bool renderSelectedItemOnly = false;
if (isAriaHidden) {
// aria-hidden
isVisible = false;
} else {
// If a node has children, it's visible.
isVisible = width > 0 && height > 0 || childCount > 0;
if ((role == ROLE_SYSTEM_LIST && !(states & STATE_SYSTEM_READONLY))
|| role == ROLE_SYSTEM_OUTLINE
) {
renderSelectedItemOnly = true;
}
if (IA2TextIsUnneededSpace
|| role == ROLE_SYSTEM_COMBOBOX
|| renderSelectedItemOnly
|| isEmbeddedApp
|| role == ROLE_SYSTEM_EQUATION
|| (nameIsContent && nameIsExplicit)
) {
renderChildren = false;
}
}
//Expose all available actions
IAccessibleAction* paccAction=NULL;
pacc->QueryInterface(IID_IAccessibleAction,(void**)&paccAction);
if(paccAction) {
long nActions=0;
paccAction->nActions(&nActions);
for(int i=0;i<nActions;++i) {
BSTR actionName=NULL;
paccAction->get_name(i,&actionName);
if(actionName) {
wstring attribName=L"IAccessibleAction_";
attribName+=actionName;
s<<i;
parentNode->addAttribute(attribName,s.str());
s.str(L"");
if(!isNeverInteractive&&(wcscmp(actionName, L"click")==0||wcscmp(actionName, L"showlongdesc")==0)) {
isInteractive=true;
}
SysFreeString(actionName);
}
}
paccAction->Release();
}
// Handle table cell information.
IAccessibleTableCell* paccTableCell = NULL;
if(pacc->QueryInterface(IID_IAccessibleTableCell, (void**)&paccTableCell)!=S_OK) {
paccTableCell=nullptr;
}
if(paccTable2) {
// We are rendering a node that is part of a table (row group, row or cell).
// Set some properties to ensure that this and other nodes in the table aare correctly re-rendered if the table changes,
// so that the table's row and column cordinates remain accurate.
// setting denyReuseIfPreviousSiblingsChange ensures that if any part of the table is added or removed previous to this node,
// this node will not be reused (as its row / column coordinates would now be out of date).
LOG_DEBUG(L"Setting node's denyReuseIfPreviousSiblingsChanged to true");
parentNode->denyReuseIfPreviousSiblingsChanged=true;
if(!paccTableCell) { // just rows and row groups
// setting requiresParentUpdate ensures that if this node is specifically invalidated,
// its parent will also be invalidated.
// For example, if this is a table row group, its rerendering may change the number of rows inside.
// this in turn would affect the coordinates of all table cells in table rows after this row group.
// Thus, ensuring we rerender this node's parent, gives a chance to rerender other table rows.
// Note that we however do not want to set this on table rows as if this row alone is invalidated, none of the other row coordinates would be affected.
if(role!=ROLE_SYSTEM_ROW) {
LOG_DEBUG(L"Setting node's requiresParentUpdate to true");
parentNode->requiresParentUpdate=true;
}
// Setting alwaysRerenderChildren ensures that if this node is rerendered, none of its children are reused.
// For example, if this is a table row that is rerendered (perhaps due to a previous table row being added),
// this row's cells can't be reused because their coordinates would now be out of date.
LOG_DEBUG(L"Setting node's alwaysRerenderChildren to true");
parentNode->alwaysRerenderChildren=true;
}
}
// For IAccessibleTable, we must always be passed the table interface by the caller.
// For IAccessibleTable2, we can always obtain the cell interface,
// which allows us to handle updates to table cells.
if (
paccTableCell || // IAccessibleTable2
(paccTable && (IA2AttribsMapIt = IA2AttribsMap.find(L"table-cell-index")) != IA2AttribsMap.end()) // IAccessibleTable
) {
if (paccTableCell) {
// IAccessibleTable2
this->fillTableCellInfo_IATable2(parentNode, paccTableCell);
if (!paccTable2) {
// This is an update; we're not rendering the entire table.
tableID = getTableIDFromCell(paccTableCell);
}
paccTableCell->Release();
paccTableCell = NULL;
} else // IAccessibleTable
fillTableCellInfo_IATable(parentNode, paccTable, IA2AttribsMapIt->second);
// tableID is the IAccessible2::uniqueID for paccTable.
s << tableID;
parentNode->addAttribute(L"table-id", s.str());
s.str(L"");
// We're now within a cell, so descendant nodes shouldn't refer to this table anymore.
paccTable = NULL;
paccTable2 = NULL;
tableID = 0;
}
// Handle table information.
// Don't release the table unless it was created in this call.
bool releaseTable = false;
// If paccTable is not NULL, we're within a table but not yet within a cell, so don't bother to query for table info.
if (!paccTable2 && !paccTable) {
// Try to get table information.
pacc->QueryInterface(IID_IAccessibleTable2,(void**)&paccTable2);
if(!paccTable2)
pacc->QueryInterface(IID_IAccessibleTable,(void**)&paccTable);
if (paccTable2||paccTable) {
// We did the QueryInterface for paccTable, so we must release it after all calls that use it are done.
releaseTable = true;
// This is a table, so add its information as attributes.
if((IA2AttribsMapIt = IA2AttribsMap.find(L"layout-guess")) != IA2AttribsMap.end())
parentNode->addAttribute(L"table-layout",L"1");
tableID = ID;
s << ID;
parentNode->addAttribute(L"table-id", s.str());
s.str(L"");
if(paccTable2)
fillTableCounts<IAccessibleTable2>(parentNode, pacc, paccTable2);
else
fillTableCounts<IAccessibleTable>(parentNode, pacc, paccTable);
// Add the table summary if one is present and the table is visible.
if (isVisible &&
(!description.empty() && (tempNode = buffer->addTextFieldNode(parentNode, previousNode, description))) ||
// If there is no caption, the summary (if any) is the name.
// There is no caption if the label isn't visible.
(name && !labelVisible && (tempNode = buffer->addTextFieldNode(parentNode, previousNode, name)))
) {
if(!locale.empty()) tempNode->addAttribute(L"language",locale);
previousNode = tempNode;
}
}
}
// Add some presentational table attributes
// Note these are only for reporting, the physical table attributes (table-physicalrownumber etc) for aiding in navigation etc are added later on.
// propagate table-rownumber down to the cell as Gecko only includes it on the row itself
if(parentPresentationalRowNumber)
parentNode->addAttribute(L"table-rownumber",parentPresentationalRowNumber);
const wchar_t* presentationalRowNumber=NULL;
if((IA2AttribsMapIt = IA2AttribsMap.find(L"rowindex")) != IA2AttribsMap.end()) {
parentNode->addAttribute(L"table-rownumber",IA2AttribsMapIt->second);
presentationalRowNumber=IA2AttribsMapIt->second.c_str();
}
if((IA2AttribsMapIt = IA2AttribsMap.find(L"colindex")) != IA2AttribsMap.end())
parentNode->addAttribute(L"table-columnnumber",IA2AttribsMapIt->second);
if((IA2AttribsMapIt = IA2AttribsMap.find(L"rowcount")) != IA2AttribsMap.end())
parentNode->addAttribute(L"table-rowcount",IA2AttribsMapIt->second);
if((IA2AttribsMapIt = IA2AttribsMap.find(L"colcount")) != IA2AttribsMap.end())
parentNode->addAttribute(L"table-columncount",IA2AttribsMapIt->second);
BSTR value=NULL;
if(pacc->get_accValue(varChild,&value)==S_OK) {
if(value&&SysStringLen(value)==0) {
SysFreeString(value);
value=NULL;
}
}
//If the name isn't being rendered as the content, then add the name as a field attribute.
if (!nameIsContent && name)
parentNode->addAttribute(L"name", name);
if(nameIsContent) {
// We may render an accessible name for this node if it has been explicitly set or it has no useful content.
parentNode->alwaysRerenderDescendants=true;
}
if (isVisible) {
if ( isImgMap && name ) {
// This is an image map with a name. Render the name first.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,name);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
if (isInteractive && !ignoreInteractiveUnlabelledGraphics) {
// Don't render interactive unlabelled graphic descendants if this node has a name,
// as author supplied names are preferred.
ignoreInteractiveUnlabelledGraphics = name != NULL;
}
if (renderChildren && IA2TextLength > 0) {
// Process IAccessibleText.
int chunkStart=0;
long attribsStart = 0;
long attribsEnd = 0;
map<wstring,wstring> textAttribs;
auto linkGetter = makeHyperlinkGetter(pacc);
for(int i=0;;++i) {
if(i!=chunkStart&&(i==IA2TextLength||i==attribsEnd||IA2Text[i]==EMBEDDED_OBJ_CHAR)) {
// We've reached the end of the current chunk of text.
// (A chunk ends at the end of the text, at the end of an attributes run
// or at an embedded object char.)
// Add the chunk to the buffer.
if(tempNode=buffer->addTextFieldNode(parentNode,previousNode,wstring(IA2Text+chunkStart,i-chunkStart))) {
previousNode=tempNode;
// Add the IA2Text start offset as an attribute on the node.
s << chunkStart;
previousNode->addAttribute(L"ia2TextStartOffset", s.str());
s.str(L"");
// Add text attributes.
for(map<wstring,wstring>::const_iterator it=textAttribs.begin();it!=textAttribs.end();++it)
previousNode->addAttribute(it->first,it->second);
#define copyObjectAttribute(attr) if ((IA2AttribsMapIt = IA2AttribsMap.find(attr)) != IA2AttribsMap.end()) \
previousNode->addAttribute(attr, IA2AttribsMapIt->second);
copyObjectAttribute(L"text-align");
#undef copyObjectAttribute
}
}
if(i==IA2TextLength)
break;
if(i==attribsEnd) {
// We've hit the end of the last attributes run and thus the start of the next.
textAttribs.clear();
chunkStart=i;
BSTR attribsStr;
if(paccText->get_attributes(attribsEnd,&attribsStart,&attribsEnd,&attribsStr)==S_OK) {
if(attribsStr) {
IA2AttribsToMap(attribsStr,textAttribs);
SysFreeString(attribsStr);
}
} else {
// If attributes fails, assume it'll fail for the entire text.
attribsEnd=IA2TextLength;
}
}
if (IA2Text[i] == EMBEDDED_OBJ_CHAR && linkGetter) {
// Embedded object char.
// The next chunk of text shouldn't include this char.
chunkStart=i+1;
// In Gecko, hyperlinks correspond to embedded object chars,
// so there's no need to call IAHyperlink::hyperlinkIndex.
CComPtr<IAccessibleHyperlink> link = linkGetter->next();
CComQIPtr<IAccessible2> childPacc = link;
if(!childPacc) {
continue;
}
if (tempNode = this->fillVBuf(childPacc, buffer, parentNode, previousNode, paccTable, paccTable2, tableID, presentationalRowNumber, ignoreInteractiveUnlabelledGraphics)) {
previousNode=tempNode;
} else {
LOG_DEBUG(L"Error in fillVBuf");
}
}
}
} else if (renderChildren && childCount > 0) {
// The object has no text, but we do want to render its children.
VARIANT* varChildren;
if(!(varChildren=(VARIANT*)malloc(sizeof(VARIANT)*childCount))) {
LOG_DEBUG(L"Error allocating varChildren memory");
return NULL;
}
long accessibleChildrenCount = 0;
if(AccessibleChildren(pacc,0,childCount,varChildren,&accessibleChildrenCount)!=S_OK) {
LOG_DEBUG(L"AccessibleChildren failed");
accessibleChildrenCount=0;
}
for(long i=0;i<accessibleChildrenCount;++i) {
if (varChildren[i].vt != VT_DISPATCH) {
VariantClear(&(varChildren[i]));
continue;
}
IAccessible2* childPacc=NULL;
if(varChildren[i].pdispVal) varChildren[i].pdispVal->QueryInterface(IID_IAccessible2,(void**)&childPacc);
if (!childPacc) {
VariantClear(&(varChildren[i]));
continue;
}
if (tempNode = this->fillVBuf(childPacc, buffer, parentNode, previousNode, paccTable, paccTable2, tableID, presentationalRowNumber, ignoreInteractiveUnlabelledGraphics))
previousNode=tempNode;
else
LOG_DEBUG(L"Error in calling fillVBuf");
childPacc->Release();
VariantClear(&(varChildren[i]));
}
free(varChildren);
} else if (renderSelectedItemOnly) {
CComPtr<IAccessible2> item = this->getSelectedItem(pacc, IA2AttribsMap);
if (item) {
if (tempNode = this->fillVBuf(item, buffer, parentNode, previousNode,
paccTable, paccTable2, tableID, presentationalRowNumber,
ignoreInteractiveUnlabelledGraphics)
) {
previousNode=tempNode;
// The container itself might not always fire selection events.
// Therefore, we rely on a stateChange event on the item (since
// these fire for both selection and unselection) and have the item
// re-render its parent.
static_cast<VBufStorage_controlFieldNode_t*>(tempNode)->requiresParentUpdate = true;
} else {
LOG_DEBUG(L"Error in calling fillVBuf");
}
}
} else {
// There were no children to render.
if(role==ROLE_SYSTEM_GRAPHIC) {
if (name && name[0]) {
// The graphic has a label, so use it.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,name);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
} else if ((name && !name[0]) || ignoreInteractiveUnlabelledGraphics) {
// alt="" or we've determined that all unlabelled graphics should be ignored,
// so don't render the graphic at all.
isInteractive = false;
} else if (isInteractive) {
// The graphic is unlabelled, but we should try to derive a name for it.
if (inLink && value) {
// derive the label from the link URL.
previousNode = buffer->addTextFieldNode(parentNode, previousNode, getNameForURL(value));
} else if ((IA2AttribsMapIt = IA2AttribsMap.find(L"src")) != IA2AttribsMap.end()) {
// Derive the label from the graphic URL.
previousNode = buffer->addTextFieldNode(parentNode, previousNode, getNameForURL(IA2AttribsMap[L"src"]));
}
}
} else if (!nameIsContent && value) {
previousNode=buffer->addTextFieldNode(parentNode,previousNode,value);
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
}
if (!isEditable && (nameIsContent || role == IA2_ROLE_SECTION || role == IA2_ROLE_TEXT_FRAME) && !nodeHasUsefulContent(parentNode)) {
// If there is no useful content and the name can be the content,
// render the name if there is one.
if(name) {
tempNode = buffer->addTextFieldNode(parentNode, NULL, name);
if(tempNode && !locale.empty()) tempNode->addAttribute(L"language", locale);
} else if(role==ROLE_SYSTEM_LINK&&value) {
// If a link has no name, derive it from the URL.
buffer->addTextFieldNode(parentNode, NULL, getNameForURL(value));
}
}
if ((role == ROLE_SYSTEM_CELL || role == ROLE_SYSTEM_ROWHEADER || role == ROLE_SYSTEM_COLUMNHEADER||role==IA2_ROLE_UNKNOWN) && parentNode->getLength() == 0) {
// Always render a space for empty table cells and unknowns.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,L" ");
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
parentNode->isBlock=false;
}
if ((isInteractive || role == ROLE_SYSTEM_SEPARATOR) && parentNode->getLength() == 0) {
// If the node is interactive or otherwise relevant even when empty
// and it still has no content, render a space so the user can access the node.
previousNode=buffer->addTextFieldNode(parentNode,previousNode,L" ");
if(previousNode&&!locale.empty()) previousNode->addAttribute(L"language",locale);
}
}
// Clean up.
if(name)
SysFreeString(name);
if(value)
SysFreeString(value);
if (IA2Text)
SysFreeString(IA2Text);
if(paccText)
paccText->Release();
if (releaseTable) {
if(paccTable2)
paccTable2->Release();
else
paccTable->Release();
}
return parentNode;
}
