/// <summary>
/// Utility for properly printing the start tag for an element.
/// This utility takes care of including/suppressing attributes and namespaces properly.
/// </summary>
/// <param name="writer"></param>
/// <param name="element"></param>
private static void printElementStart(HtmlWriter writer, IHTMLElement element)
{
string tagName = element.tagName;
// If there is no tag name, this is mostly an artificial tag reported by mshtml,
// and not really present in the markup
// (e.g HTMLTableCaptionClass)
if (string.IsNullOrEmpty(tagName))
{
return;
}
//XHTML tags are all lowercase
tagName = tagName.ToLower(CultureInfo.InvariantCulture);
//this is a standard HTML tag, so just write it out.
writer.WriteStartElement(tagName);
IHTMLDOMNode node = element as IHTMLDOMNode;
IHTMLAttributeCollection attrs = node.attributes as IHTMLAttributeCollection;
if (attrs != null)
{
foreach (IHTMLDOMAttribute attr in attrs)
{
string attrName = attr.nodeName as string;
if (attr.specified)
{
string attrNameLower = attrName.ToLower(CultureInfo.InvariantCulture);
//get the raw attribute value (so that IE doesn't try to expand out paths in the value).
string attrValue = element.getAttribute(attrName, 2) as string;
if (attrValue == null)
{
//IE won't return some attributes (like class) using IHTMLElement.getAttribute(),
//so if the value is null, try to get the value directly from the DOM Attribute.
//Note: we can't use the DOM value by default, because IE will rewrite the value
//to contain a fully-qualified path on some attributes (like src and href).
attrValue = attr.nodeValue as string;
if (attrValue == null)
{
if ((attrNameLower == "hspace" || attrNameLower == "vspace") && attr.nodeValue is int)
{
attrValue = ((int)attr.nodeValue).ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "style")
{
//Avoid bug: Images that are resized with the editor insert a STYLE attribute.
//IE won't return the style attribute using the standard API, so we have to grab
//it from the style object
attrValue = element.style.cssText;
}
else if (attrNameLower == "colspan")
{
attrValue = (element as IHTMLTableCell).colSpan.ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "rowspan")
{
attrValue = (element as IHTMLTableCell).rowSpan.ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "align" && attr.nodeValue is int)
{
// This is not documented anywhere. Just discovered the values empirically on IE7 (Vista).
switch ((int)attr.nodeValue)
{
case 1:
attrValue = "left";
break;
case 2:
attrValue = "center";
break;
case 3:
attrValue = "right";
break;
case 4:
attrValue = "texttop";
break;
case 5:
attrValue = "absmiddle";
break;
case 6:
attrValue = "baseline";
break;
case 7:
attrValue = "absbottom";
break;
case 8:
attrValue = "bottom";
break;
case 9:
attrValue = "middle";
break;
case 10:
attrValue = "top";
break;
}
}
}
Debug.WriteLineIf(attrValue != null && attrName != "id", String.Format(CultureInfo.InvariantCulture, "{0}.{1} attribute value not retreived", tagName, attrName), element.outerHTML);
}
// Minimized attributes are not allowed, according
// to section 4.5 of XHTML 1.0 specification.
// TODO: Deal with simple values that are not strings
if (attrValue == null && attrNameLower != "id")
{
attrValue = attrName;
}
if (attrName != null && attrValue != null)
{
//write out this attribute.
writer.WriteAttributeString(attrName, attrValue);
}
}
}
}
}
/// <summary>
/// Utility for properly printing the start tag for an element.
/// This utility takes care of including/suppresing attributes and namespaces properly.
/// </summary>
/// <param name="writer"></param>
/// <param name="element"></param>
private static void printElementStart(HtmlWriter writer, IHTMLElement element)
{
string tagName = element.tagName;
// If there is no tag name, this is mostly an artificial tag reported by mshtml,
// and not really present in the markup
// (e.g HTMLTableCaptionClass)
if (string.IsNullOrEmpty(tagName))
{
return;
}
//XHTML tags are all lowercase
tagName = tagName.ToLower(CultureInfo.InvariantCulture);
//this is a standard HTML tag, so just write it out.
writer.WriteStartElement(tagName);
IHTMLDOMNode node = element as IHTMLDOMNode;
IHTMLAttributeCollection attrs = node.attributes as IHTMLAttributeCollection;
if (attrs != null)
{
foreach (IHTMLDOMAttribute attr in attrs)
{
string attrName = attr.nodeName as string;
if (attr.specified)
{
string attrNameLower = attrName.ToLower(CultureInfo.InvariantCulture);
//get the raw attribute value (so that IE doesn't try to expand out paths in the value).
string attrValue = element.getAttribute(attrName, 2) as string;
if (attrValue == null)
{
//IE won't return some attributes (like class) using IHTMLElement.getAttribute(),
//so if the value is null, try to get the value directly from the DOM Attribute.
//Note: we can't use the DOM value by default, because IE will rewrite the value
//to contain a fully-qualified path on some attribures (like src and href).
attrValue = attr.nodeValue as string;
if (attrValue == null)
{
if ((attrNameLower == "hspace" || attrNameLower == "vspace") && attr.nodeValue is int)
{
attrValue = ((int)attr.nodeValue).ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "style")
{
//Avoid bug: Images that are resized with the editor insert a STYLE attribute.
//IE won't return the style attribute using the standard API, so we have to grab
//it from the style object
attrValue = element.style.cssText;
}
else if (attrNameLower == "colspan")
{
attrValue = (element as IHTMLTableCell).colSpan.ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "rowspan")
{
attrValue = (element as IHTMLTableCell).rowSpan.ToString(CultureInfo.InvariantCulture);
}
else if (attrNameLower == "align" && attr.nodeValue is int)
{
// This is not documented anywhere. Just discovered the values empirically on IE7 (Vista).
switch ((int)attr.nodeValue)
{
case 1:
attrValue = "left";
break;
case 2:
attrValue = "center";
break;
case 3:
attrValue = "right";
break;
case 4:
attrValue = "texttop";
break;
case 5:
attrValue = "absmiddle";
break;
case 6:
attrValue = "baseline";
break;
case 7:
attrValue = "absbottom";
break;
case 8:
attrValue = "bottom";
break;
case 9:
attrValue = "middle";
break;
case 10:
attrValue = "top";
break;
}
}
}
Debug.WriteLineIf(attrValue != null && attrName != "id", String.Format(CultureInfo.InvariantCulture, "{0}.{1} attribute value not retreived", tagName, attrName), element.outerHTML);
}
// Minimized attributes are not allowed, according
// to section 4.5 of XHTML 1.0 specification.
// TODO: Deal with simple values that are not strings
if (attrValue == null && attrNameLower != "id")
attrValue = attrName;
if (attrName != null && attrValue != null)
{
//write out this attribute.
writer.WriteAttributeString(attrName, attrValue);
}
}
}
}
}
