pango-font-family-is-monospace (family)

family -- a pango-font-family object

True if family is monospace.

A monospace font is a font designed for text display where the characters form a regular grid. For Western languages this would mean that the advance width of all characters are the same, but this categorization also includes Asian fonts which include double-width characters: characters that occupy two grid cells. The function g_unichar_iswide() returns a result that indicates whether a character is typically double-width in a monospace font.

The best way to find out the grid-cell size is to call the function pango-font-metrics-approximate-digit-width, since the results of the function pango-font-metrics-approximate-char-width may be affected by double-width characters.