error_status_t nvdaInProcUtils_getActiveObject(handle_t bindingHandle, const wchar_t* progid, IUnknown** ppUnknown) {
if(!progid) {
LOG_DEBUGWARNING(L"NULL progid");
return E_FAIL;
}
IID clsid;
HRESULT res=CLSIDFromString(progid,&clsid);
if(res!=NOERROR) {
LOG_DEBUGWARNING(L"CLSIDFromString for "<<progid<<L" returned "<<res);
return res;
}
return GetActiveObject(clsid,NULL,ppUnknown);
}
BOOL installIA2Support() {
LPFNGETCLASSOBJECT IA2Dll_DllGetClassObject;
int i;
int res;
if(isIA2Installed) return TRUE;
if((IA2DllHandle=CoLoadLibrary(IA2DllPath,FALSE))==NULL) {
LOG_ERROR(L"CoLoadLibrary failed");
return FALSE;
}
IA2Dll_DllGetClassObject=(LPFNGETCLASSOBJECT)GetProcAddress(static_cast<HMODULE>(IA2DllHandle),"DllGetClassObject");
assert(IA2Dll_DllGetClassObject); //IAccessible2 proxy dll must have this function
IUnknown* ia2ClassObjPunk=NULL;
if((res=IA2Dll_DllGetClassObject(IAccessible2ProxyIID,IID_IUnknown,(LPVOID*)&ia2ClassObjPunk))!=S_OK) {
LOG_ERROR(L"Error calling DllGetClassObject, code "<<res);
CoFreeLibrary(IA2DllHandle);
IA2DllHandle=0;
return FALSE;
}
if((res=CoRegisterClassObject(IAccessible2ProxyIID,ia2ClassObjPunk,CLSCTX_INPROC_SERVER,REGCLS_MULTIPLEUSE,(LPDWORD)&IA2RegCooky))!=S_OK) {
LOG_DEBUGWARNING(L"Error registering class object, code "<<res);
ia2ClassObjPunk->Release();
CoFreeLibrary(IA2DllHandle);
IA2DllHandle=0;
return FALSE;
}
ia2ClassObjPunk->Release();
for(i=0;i<ARRAYSIZE(ia2Iids);++i) {
CoGetPSClsid(ia2Iids[i],&(_ia2PSClsidBackups[i]));
CoRegisterPSClsid(ia2Iids[i],IAccessible2ProxyIID);
}
isIA2Installed=TRUE;
return TRUE;
}
PROPERTYID registerUIAProperty(GUID* guid, LPCWSTR programmaticName, UIAutomationType propertyType) {
HRESULT res;
IUIAutomationRegistrar* registrar=NULL;
if(CoCreateInstance(CLSID_CUIAutomationRegistrar,NULL,CLSCTX_INPROC_SERVER,IID_IUIAutomationRegistrar,(void**)®istrar)!=S_OK) {
LOG_DEBUGWARNING(L"Could not create instance of IUIAutomationRegistrar");
return 0;
}
UIAutomationPropertyInfo info={*guid,programmaticName,propertyType};
PROPERTYID propertyId=0;
res=registrar->RegisterProperty(&info,&propertyId);
if(res!=S_OK) {
LOG_DEBUGWARNING(L"IUIAutomationRegistrar::RegisterProperty failed with "<<res);
return 0;
}
registrar->Release();
return propertyId;
}
error_status_t nvdaInProcUtils_sysListView32_getGroupInfo(handle_t bindingHandle, long windowHandle, int groupIndex, BSTR* header, BSTR* footer, int* state) {
LVGROUP group={0};
group.cbSize=sizeof(group);
group.mask=LVGF_HEADER|LVGF_FOOTER|LVGF_STATE;
group.stateMask=0xffffffff;
if(!SendMessage((HWND)windowHandle,LVM_GETGROUPINFOBYINDEX,(WPARAM)groupIndex,(LPARAM)&group)) {
LOG_DEBUGWARNING(L"LVM_GETGROUPINFOBYINDEX failed");
return 1;
}
if(group.pszHeader) *header=SysAllocString(group.pszHeader);
if(group.pszFooter) *footer=SysAllocString(group.pszFooter);
*state=group.state;
return 0;
}
/* Overview of the structures being accessed:
pRange.Fields property
pRange.Fields.Count property
pRange.Fields.Item method - takes an int (starting at 1) to give item 1 up to item Count. Returns a Field
Field.Type property
Field.Result property - the range for the ref / hyperlink object. This is the displayed range.
Field.Code property - Not used, but gives the hidden part of the ref / hyperlink.
Field.Result.Start property
Field.Result.End property
*/
Fields::Fields(IDispatch* pRange) {
IDispatchPtr pDispatchFields = nullptr;
auto res = _com_dispatch_raw_propget( pRange, wdDISPID_RANGE_FIELDS, VT_DISPATCH, &pDispatchFields);
if( res != S_OK || !pDispatchFields ) {
LOG_DEBUGWARNING(L"error getting fields from range");
return;
}
int count = 0;
res = _com_dispatch_raw_propget( pDispatchFields, wdDISPID_FIELDS_COUNT, VT_I4, &count);
if( res != S_OK || count <= 0 ) {
return;
}
for(int i = 1; i <= count; ++i) {
IDispatchPtr pDispatchItem = nullptr;
res = _com_dispatch_raw_method( pDispatchFields, wdDISPID_FIELDS_ITEM, DISPATCH_METHOD, VT_DISPATCH, &pDispatchItem, L"\x0003", i);
if( res != S_OK || !pDispatchItem) {
LOG_DEBUGWARNING(L"error getting field item");
continue;
}
/*
Fields can be of many types, to get this we look at Type property. We care about:
Ref - a Reference to some other part of the file
Hyperlink - a link to another part of the file or to an external URL
The following are defined on msdn (WdFieldType Enumeration - https://msdn.microsoft.com/en-us/library/office/ff192211.aspx)
*/
const int CROSS_REFERENCE_TYPE_VALUE = 3; // wdFieldRef
const int HYPERLINK_TYPE_VALUE = 88; // wdFieldHyperlink
const int PAGE_NUMBER_TYPE_VALUE = 33; // wdFieldPage
int type = -1;
res = _com_dispatch_raw_propget( pDispatchItem, wdDISPID_FIELDS_ITEM_TYPE, VT_I4, &type);
if( res != S_OK || !(type == CROSS_REFERENCE_TYPE_VALUE || type == HYPERLINK_TYPE_VALUE || type == PAGE_NUMBER_TYPE_VALUE) ) {
continue;
}
IDispatchPtr pDispatchFieldResult = nullptr;
res = _com_dispatch_raw_propget( pDispatchItem, wdDISPID_FIELDS_ITEM_RESULT, VT_DISPATCH, &pDispatchFieldResult);
if( res != S_OK || !pDispatchFieldResult) {
LOG_DEBUGWARNING(L"error getting the result from the field item.");
continue;
}
long resultStart = 0, resultEnd = 0;
auto ok = S_OK == _com_dispatch_raw_propget( pDispatchFieldResult, wdDISPID_RANGE_START, VT_I4, &resultStart)
&& S_OK == _com_dispatch_raw_propget( pDispatchFieldResult, wdDISPID_RANGE_END, VT_I4, &resultEnd);
if(!ok) {
LOG_DEBUGWARNING(L"error getting range start and end points");
continue;
}
auto itemRange = std::make_pair(resultStart, resultEnd);
switch(type) {
case CROSS_REFERENCE_TYPE_VALUE: // intentional fall through to hyperlink case
case HYPERLINK_TYPE_VALUE:
m_links.push_back(itemRange);
break;
case PAGE_NUMBER_TYPE_VALUE:
m_pageNumbers.push_back(itemRange);
break;
}
}
}
