[python-win32] IE DOM ptr as input to DLL function - Doingthisright?

[Richard Bell]

Jef,

I'm not sure if this is helpful but you might try taking a look at the Pamie
code for how it gets deals with the DOM.

Additionally the following code snip may be helpful (self is
win32com.Client.Dispatch returned IE object)

Regards,
Richard

----- code -----
    def Dom(self,
            errorFlag = True, message = None ):
        """ Sets Yamie's dom attribute (topmost element of the page's DOM
tree).

        yie.Dom([errorFlag,][errorMessage])->object #HTML element in the DOM
tree

        The DOM is rebuilt after each navigation.  Previous values are no
longer good.

        Parameters:
        errorFlag (boolean) If True, COM error messages are written to
stderr.
                            Otherwise, COM error messages are surpressed.
        message (string)    A message to output on COM errors.
            
        Returns:
        dom (object)    The topmost element in the page's DOM tree.
                        dom is None on COM error.
                        Set status and comError.
        
        Usage:
        >>> dom = yie.Dom()
        >>> print dom             #doctest: +ELLIPSIS
        <win32com.gen_py.Microsoft HTML Object Library.DispHTMLHtmlElement
instance at 0x...>
        >>> print dom.CLSID
        {3050F560-98B5-11CF-BB82-00AA00BDCE0B}
        >>> len(dir(dom))
        65
        >>> len(dom._prop_map_get_.keys())
        130
        >>> dir(dom) == ['CLSID', 'FireEvent', '_ApplyTypes_', '__cmp__',
'__doc__', 
        ... '__getattr__', '__init__', '__module__', '__repr__',
'__setattr__', '_get_good_object_',
        ... '_get_good_single_object_', '_oleobj_', '_prop_map_get_',
'_prop_map_put_',
        ... 'addBehavior', 'addFilter', 'appendChild', 'applyElement',
'attachEvent', 'blur',
        ... 'clearAttributes', 'click', 'cloneNode', 'coclass_clsid',
'componentFromPoint',
        ... 'contains', 'createControlRange', 'detachEvent', 'doScroll',
'dragDrop', 'focus',
        ... 'getAdjacentText', 'getAttribute', 'getAttributeNode',
'getBoundingClientRect',
        ... 'getClientRects', 'getElementsByTagName', 'getExpression',
'hasChildNodes',
        ... 'insertAdjacentElement', 'insertAdjacentHTML',
'insertAdjacentText', 'insertBefore',
        ... 'mergeAttributes', 'normalize', 'releaseCapture',
'removeAttribute', 
        ... 'removeAttributeNode', 'removeBehavior', 'removeChild',
'removeExpression',
        ... 'removeFilter', 'removeNode', 'replaceAdjacentText',
'replaceChild', 'replaceNode',
        ... 'scrollIntoView', 'setActive', 'setAttribute',
'setAttributeNode', 'setCapture',
        ... 'setExpression', 'swapNode', 'toString']
        True
        >>> dom._prop_map_get_.keys()== ['all', 'contentEditable',
'parentElement',
        ... 'onrowsinserted', 'disabled', 'filters', 'onrowexit',
'children', 'style',
        ... 'ondataavailable', 'nodeName', 'ondatasetchanged', 'clientLeft',
'accessKey',
        ... 'offsetLeft', 'ondatasetcomplete', 'currentStyle', 'hideFocus',
'onclick', 'onkeypress',
        ... 'onbeforeupdate', 'onpropertychange', 'onresizestart',
'onmouseover', 'recordNumber',
        ... 'onscroll', 'onrowenter', 'clientHeight', 'onmouseenter',
'canHaveChildren', 'onkeyup',
        ... 'readyStateValue', 'onreadystatechange', 'dir', 'tagUrn',
'onfocusout', 'innerHTML',
        ... 'className', 'ondeactivate', 'onmoveend', 'ondragleave',
'glyphMode', 'onresize',
        ... 'version', 'onresizeend', 'offsetTop', 'onfocus', 'ondrag',
'previousSibling',
        ... 'onfocusin', 'nodeType', 'onbeforeeditfocus', 'onkeydown',
'outerText', 'onbeforecopy',
        ... 'language', 'title', 'firstChild', 'oncut',
'onbeforedeactivate', 'attributes',
        ... 'onmove', 'offsetParent', 'behaviorUrns', 'clientWidth',
'outerHTML', 'tagName',
        ... 'offsetHeight', 'onerrorupdate', 'onbeforepaste', 'childNodes',
'tabIndex', 
        ... 'scrollWidth', 'onpage', 'isDisabled', 'onhelp',
'oncontrolselect', 'onmouseup', 
        ... 'onmousemove', 'isMultiLine', 'onblur', 'onmouseout',
'oncellchange', 'sourceIndex', 
        ... 'scrollLeft', 'parentTextEdit', 'onmousewheel', 'lastChild',
'scrollHeight', 
        ... 'oncontextmenu', 'onrowsdelete', 'readyState', 'inflateBlock',
'onlayoutcomplete', 
        ... 'innerText', 'onmovestart', 'offsetWidth', 'uniqueID',
'onafterupdate', 'ondragenter', 
        ... 'nextSibling', 'onmousedown', 'clientTop', 'parentNode',
'oncopy', 'onfilterchange',
        ... 'id', 'ondrop', 'isTextEdit', 'onbeforecut', 'ownerDocument',
'onactivate',
        ... 'runtimeStyle', 'document', 'isContentEditable', 'ondragstart',
'onmouseleave',
        ... 'uniqueNumber', 'scrollTop', 'onpaste', 'ondragover', 'lang',
'ondragend',
        ... 'canHaveHTML', 'scopeName', 'nodeValue', 'onlosecapture',
'onbeforeactivate',
        ... 'ondblclick', 'onselectstart']
        True
         """
        try:
            node = self.Document.all.tags("HTML")
            self.dom = node.item(0)
            return self.dom
        except pythoncom.com_error, (hr, hrtxt, addinfo, arg):
            self.dom = None
            if not message: message = 'Dom error'
            self._ComError( errorFlag, message, hr, hrtxt, addinfo, arg)
            return None


|-----Original Message-----
|From: python-win32-bounces at python.org [mailto:python-win32-
|bounces at python.org] On Behalf Of Mark Hammond
|Sent: Friday, June 29, 2007 11:47 PM
|To: 'Jef Allbright'; python-win32 at python.org
|Subject: Re: [python-win32] IE DOM ptr as input to DLL function -
|Doingthisright?
|
|> I'm a newbie to Win32 COM and am unsure whether my current problem
|> lies in what I'm doing or possibly in some quirk of the DLL I'm trying
|> to use from Python.
|>
|> I have a snippet of C++ that I want to implement in Python:
|>
|> 	IDispatch* pVoid;
|> 	m_pBrowserApp->get_Document(&pVoid);
|> 	m_pAnalyzer->Analyze(pVoid, _variant_t(5L));
|> 	pVoid->Release();
|>
|> At first, I tried using win32com.Client.Dispatch to create a COM
|> object for both my DLL and for the IE browser, and that worked well up
|> to the point where I tried to use the ie.Document object as input to
|> Analyze where it expects the pVoid.  Got "argument is not a COM
|> object"
|
|In general, COM itself doesn't understand a "void *".  In the example
|above,
|that first param would probably be best defined as IUnknown rather than
|void.  Further, in general, win32com only supports IDispatch based
|interfaces, but the C++ example above is using vtables.  If you can get
|your
|analyzer interface working via IDispatch, it will work correctly from
|Python, as well as VBScript, JS, etc...
|
|I'm afraid I can't help with the comtypes issues...
|
|Cheers,
|
|Mark
|
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