2009-11-05 Jeffrey Stedfast <fejj@novell.com>

2009-11-05  Jeffrey Stedfast  <fejj@novell.com>

	* brush.cpp (ImageBrush::OnPropertyChanged): Check that the Source
	uri is valid and the download policy will allow it.

	* media.cpp (Image::OnPropertyChanged): Check that the Source uri
	is valid and the download policy will allow it.

	* mediaelement.cpp (OnPropertyChanged): Check that the Source uri
	is valid and the download policy will allow it.

	* glyphs.cpp (DownloadFont): Now takes a MoonError argument so
	that (late) download policy errors (caused by a failed
	Downloader::Open) can propogate up through callers like
	OnPropertyChanged() or SetParent().
	(SetParent): Moved here from from SetSurface() so that we can
	throw an exception when ading the glyphs to the tree if the
	FontUri is invalid.
	(OnPropertyChanged): Set the MoonError if the uri is invalid.

	* bitmapimage.cpp (ValidateDownloadPolicy): New method to check if
	the uri can be downloaded.
	(OnPropertyChanged): Check if the Source uri is invalid. If so,
	set an error.

	* downloader.cpp (ValidateDownloadPolicy): New static method to
	check that the policy would allow downloading the content at the
	uri. Split out from Open().

	* uri.h (IsInvalidPath): New method to check the validity of the
	path component of a URI.
	(IsUncPath): New method that returns true if the path begins with \\

	r:spouliot

git-svn-id: svn+ssh://mono-cvs.ximian.com/source/trunk/moon@145615 e3ebcda4-bce8-0310-ba0a-eca2169e7518