#define CAMEL_FOLDER_TYPE_MASK (63 << CAMEL_FOLDER_TYPE_BIT)
+/**
+ * CamelMimeFilterToHTMLFlags:
+ * @CAMEL_MIME_FILTER_TOHTML_PRE:
+ * Enclose the content in <pre> ... </pre> tags.
+ * @CAMEL_MIME_FILTER_TOHTML_CONVERT_NL:
+ * Convert newline characters to <br> tags.
+ * @CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES:
+ * Convert space and tab characters to a non-breaking space ( ).
+ * @CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS:
+ * Convert recognized URLs to <a href="foo">foo</a>.
+ * @CAMEL_MIME_FILTER_TOHTML_MARK_CITATION:
+ * Color quoted lines (lines beginning with '>').
+ * @CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES:
+ * Convert mailto: URLs to <a href="mailto:foo">mailto:foo</a>.
+ * @CAMEL_MIME_FILTER_TOHTML_ESCAPE_8BIT:
+ * Convert 8-bit characters to escaped hexdecimal (&#nnn;).
+ * @CAMEL_MIME_FILTER_TOHTML_CITE:
+ * Prefix each line with "> ".
+ * @CAMEL_MIME_FILTER_TOHTML_PRESERVE_8BIT:
+ * This flag is not used by #CamelMimeFilterToHTML.
+ * @CAMEL_MIME_FILTER_TOHTML_FORMAT_FLOWED:
+ * This flag is not used by #CamelMimeFilterToHTML.
+ *
+ * Flags for converting text/plain content into text/html.
+ **/
typedef enum { /*< flags >*/
CAMEL_MIME_FILTER_TOHTML_PRE = 1 << 0,
CAMEL_MIME_FILTER_TOHTML_CONVERT_NL = 1 << 1,