I have a IWebBrowser2 control implemented (with some chages) as in this thread and, I suppose, that is originated from a project in codeproject.com here. I'm trying to load the following embedded HTML code:
static const std::wstring html =
LR"(
<!DOCTYPE html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"; content="IE=7">
</head>
<body>
<p>Hello, Привет</p>
</body>
</html>
)";
Here is the code for loading HTML:
// Invoking method
HRESULT STDMETHODCALLTYPE WebBrowser::Invoke(
DISPID dispIdMember,
REFIID riid,
LCID lcid,
WORD wFlags,
DISPPARAMS* pDispParams,
VARIANT* pVarResult,
EXCEPINFO* pExcepInfo,
UINT* puArgErr)
{
if (dispIdMember == DISPID_DOCUMENTCOMPLETE) {
return OnDocumentCompleted(pDispParams);
}
return S_OK;
}
// Loads HTML document
HRESULT WebBrowser::OnDocumentCompleted(DISPPARAMS* args)
{
if (html_.empty()) {
return S_OK;
}
IDispatch* iDispatch = 0;
IHTMLDocument2* htmlDocument = 0;
HRESULT result = webBrowser_->get_Document(&iDispatch);
if (SUCCEEDED(result) && iDispatch) {
result = iDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&htmlDocument);
}
else {
LogRD("WebBrowser error in OnDocumentCompleted", "Cann't get HTML document");
}
IStream* iStream = 0;
IPersistStreamInit* htmlDocumentPersistStream = 0;
if (SUCCEEDED(result) && htmlDocument) {
result = htmlDocument->QueryInterface(IID_IPersistStreamInit, (void**)&htmlDocumentPersistStream);
}
else {
LogRD("WebBrowser error in OnDocumentCompleted", "Cann't query IID_IPersistStreamInit interface");
}
if (SUCCEEDED(result) && htmlDocumentPersistStream) {
iStream = SHCreateMemStream((BYTE*)html_.c_str(), html_.size() * sizeof(wchar_t));
result = htmlDocumentPersistStream->Load(iStream);
if (FAILED(result)) {
LogRD("WebBrowser error in OnDocumentCompleted", "Failed to load iStream");
}
}
if (iStream) {
iStream->Release();
}
if (htmlDocumentPersistStream) {
htmlDocumentPersistStream->Release();
}
if (htmlDocument) {
htmlDocument->Release();
}
if (iDispatch) {
iDispatch->Release();
}
html_.clear();
return S_OK;
}
The result is:
I've found that Internet Explorer has some requirements for displaying UTF-8 in MSDN. I believe some requirements are satisfied, for example my HTML contains the charset=UTF-8 meta-tag, and my HTML is less than 4Kb in size. However, I don't know how to complete remaining requirements. What else do I need to show UTF-8 symbols properly?