Hello all,
I recently found out about the Mozilla Active X control and since it was
supposed to be adrop-in replacement for the IE control, I downloaded it
to check it out.
While the basics seemd to work, it wasn't quite a drop-in replacement
for me. On eproblem was trgar it doesn't support the the res protocol.
In my Windows app I have the basic HTML page defined as a resource and I
could just tell the IE control
m_pBrowser->Navigate(_bstr_t("res://MultiBible.exe/135"), NULL, NULL,
NULL, NULL);
and that basic page page would show. This was minor thing, however,
since I could just use the IHTMLDocument2::write() method instead.
However, a non-minor problem was that the Mozilla control did not like
the IHTMLDocument2::get_body() method. I use the basic HTML doc to set
up what things are going to look like with a <style> tag, and then
whenever that data that needs to be shown is changed I use get_body() to
return a pointer an IHTMLElement object for the <body> tag and the use
IHTMLElements put_innerHTML, put_innerText() and insertAdjacentHTML to
first clear everything inside the <body> tag and then add the new data.
The code looks like this:
void CHtmlWindow::ClearBody()
{
IHTMLDocument2 *phtml = NULL;
IHTMLElement *pbody = NULL;
phtml = GetDocument();
if (phtml != NULL) {
phtml->get_body(&pbody);
if (pbody) {
pbody->put_innerHTML(_bstr_t(L""));
pbody->put_innerText(_bstr_t(L""));
}
phtml->Release();
}
}
int CHtmlWindow::AddLine(LPWSTR lpszLine)
{
IHTMLDocument2 *phtml = NULL;
IHTMLElement *pbody = NULL;
HRESULT hr;
BSTR line = _bstr_t(lpszLine);
phtml = GetDocument();
if (phtml != NULL) {
hr = phtml->get_body(&pbody);
if (pbody) {
hr = pbody->insertAdjacentHTML(_bstr_t("beforeEnd"), line);
}
phtml->Release();
}
return 0;
}
It all works perfectly in the IE control, but in AddLine() the line
phtml->get_body(&pbody); causes my app to crash when I use the Mozilla
control and ClearBody() was called just before. If I comment out the
ClearBody() call, then the phtml->get_body() works but
pbody->insertAdjacentHTML() returns 0x80004001. (I have no idea what
that value means, but in WinError.h there is the comment "Invalid advise
flags" just before the #define of OLE_E_ADVF as that value.)
First off, why would IHTMLDocument2::get_body() crash after after using
the code in ClearBody()? The <body> tag may be empty, but it is still
there. Second, why would IHTMLDocument2::insertAdjacentHTML() fail to
add the new HTML? Anybody have nay ideas?
Thanks in advance.
--
Cory Albrecht
http://www.sentex.net/~corya/
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