nsIDOMFontFace 编辑

layout/inspector/public/nsIDOMFontFace.idlScriptable Describes a single font face. 1.0 66 Introduced Gecko 7.0 Inherits from: nsISupports Last changed in Gecko 7.0 (Firefox 7.0 / Thunderbird 7.0 / SeaMonkey 2.4)

This object describes a single font. It's returned in a list you can get using inIDOMUtils.getUsedFontFaces().

Attributes

Font source attributes

These attributes indicate how the font was found during the font matching process.

Note: The same physical font may have been found in multiple ways within a range.

Attribute	Type	Description
fromFontGroup	boolean	Indicates whether or not the font was located in a font group. Read only.
fromLanguagePrefs	boolean	Indicates whether or not the font was located using language preferences. Read only.
fromSystemFallback	boolean	Indicates whether or not the font is the system fallback font. Read only.

Attributes available for all fonts

These attributes are always available.

Attribute	Type	Description
CSSFamilyName	DOMString	A family name that could be used in CSS font-family (not necessarily the actual name that was used, due to aliases, generics, localized names, and so on). Read only.
name	DOMString	Full font name as obtained from the font resource. Read only.

Attributes only available when specified with @font-face

These attributes only have meaningful values when the font is a user font defined using @font-face.

Attribute	Type	Description
format	DOMString	The font format. Read only.
localName	DOMString	null if not a src:local(...) rule. Read only.
metadata	DOMString	XML metadata from WOFF file(if any). Read only.
rule	nsIDOMCSSFontFaceRule	null if no associated @font-face rule. Read only.
srcIndex	long	Index in the rule's src list, -1 if no @font-face rule. Read only.
URI	DOMString	null if not a downloaded font, that is local. Read only.

See also

• nsIDOMFontFaceList