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Diffstat (limited to 'lispref/modes.texi')
| -rw-r--r-- | lispref/modes.texi | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/lispref/modes.texi b/lispref/modes.texi index 4f68bb5064b..29c316d625d 100644 --- a/lispref/modes.texi +++ b/lispref/modes.texi @@ -2358,7 +2358,12 @@ Lock mode is enabled, to set all the other variables. @defvar font-lock-defaults This variable is set by major modes, as a buffer-local variable, to specify how to fontify text in that mode. It automatically becomes -buffer-local when you set it. The value should look like this: +buffer-local when you set it. If its value is @code{nil}, Font-Lock +mode does no highlighting, and you can use the @samp{Faces} menu +(under @samp{Edit} and then @samp{Text Properties} in the menu bar) to +assign faces explicitly to text in the buffer. + +If non-@code{nil}, the value should look like this: @example (@var{keywords} [@var{keywords-only} [@var{case-fold} @@ -2374,9 +2379,10 @@ The first symbol specifies how to do level 1 fontification, the second symbol how to do level 2, and so on. @xref{Levels of Font Lock}. The second element, @var{keywords-only}, specifies the value of the -variable @code{font-lock-keywords-only}. If this is non-@code{nil}, -syntactic fontification (of strings and comments) is not performed. -@xref{Syntactic Font Lock}. +variable @code{font-lock-keywords-only}. If this is omitted or +@code{nil}, syntactic fontification (of strings and comments) is also +performed. If this is non-@code{nil}, such fontification is not +performed. @xref{Syntactic Font Lock}. The third element, @var{case-fold}, specifies the value of @code{font-lock-keywords-case-fold-search}. If it is non-@code{nil}, @@ -2403,6 +2409,13 @@ fontification, aside from those you can control with the first five elements. @xref{Other Font Lock Variables}. @end defvar + If your mode fontifies text explicitly by adding +@code{font-lock-face} properties, it can specify @code{(nil t)} for +@code{font-lock-defaults} to turn off all automatic fontification. +However, this is not required; it is possible to fontify some things +using @code{font-lock-face} properties and set up automatic +fontification for other parts of the text. + @node Search-based Fontification @subsection Search-based Fontification |