Pango Text Attribute Markup3Pango LibraryPango Text Attribute MarkupSimple
markup language to encode text plus a PangoAttrListPango Text Attribute Markup Language
Frequently, you want to display some text to the user with attributes
applied to part of the text (for example, you might want bold or
italicized words). With the base Pango interfaces, you could create a
PangoAttrList and apply it to the
text; the problem is that you'd need to apply attributes to some
numeric range of characters, for example "characters 12-17." This is
broken from an internationalization standpoint; once the text is
translated, the word you wanted to italicize could be in a different
position.
The solution is to include the text attributes in the string to be
translated. Pango provides this feature with a small markup language.
You can parse a marked-up string into the string text plus a
PangoAttrList using the function
pango_parse_markup().
A simple example of a marked-up string might be:
"<span foreground="blue" size="100">Blue text</span> is <i>cool</i>!"
The root tag of a marked-up document is <markup>, but pango_parse_markup() allows you to
omit this tag, so you will most likely never need to use it. The most
general markup tag is <span>, then there are some convenience
tags. <span> has the following attributes:
<span> attributesfont_desc
A font description string, such as "Sans Italic 12"; note that any other
span attributes will override this description. So if you have "Sans
Italic" and also a style="normal" attribute, you will get Sans normal,
not italic.
font_family
A font family name
face
Synonym for font_family
size
Font size in 1000ths of a point, one of the absolute sizes
'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large',
'xx-large', or one of the relative sizes 'smaller' or 'larger'.
style
One of 'normal', 'oblique', 'italic'
weight
One of 'ultralight', 'light', 'normal', 'bold', 'ultrabold', 'heavy',
or a numeric weight
variant
'normal' or 'smallcaps'
stretch
One of 'ultracondensed', 'extracondensed', 'condensed',
'semicondensed', 'normal', 'semiexpanded', 'expanded',
'extraexpanded', 'ultraexpanded'
foreground
An RGB color specification such as '#00FF00' or a color name such as
'red'
background
An RGB color specification such as '#00FF00' or a color name such as
'red'
underline
One of 'single', 'double', 'low', 'none'
rise
Vertical displacement, in 10000ths of an em. Can be negative for
subscript, positive for superscript.
strikethrough
'true' or 'false' whether to strike through the text
lang
A language code, indicating the text language
The following convenience tags are provided:
Convenience tagsb
Bold
big
Makes font relatively larger, equivalent to <span size="larger">
i
Italic
s
Strikethrough
sub
Subscript
sup
Superscript
small
Makes font relatively smaller, equivalent to <span size="smaller">
tt
Monospace font
u
Underline