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| -rw-r--r-- | src/Hakyll/Web/Template.hs | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/Hakyll/Web/Template.hs b/src/Hakyll/Web/Template.hs index 76911e0..56f5da9 100644 --- a/src/Hakyll/Web/Template.hs +++ b/src/Hakyll/Web/Template.hs @@ -33,6 +33,89 @@ -- -- Because of it's simplicity, these templates can be used for more than HTML: -- you could make, for example, CSS or JS templates as well. +-- +-- Apart from interpolating @$key$@s from the 'Context' you can also +-- use the following macros: +-- +-- * @$if(key)$@ +-- +-- > $if(key)$ +-- > <b> Defined </b> +-- > $else$ +-- > <b> Non-defined </b> +-- > $endif$ +-- +-- This example will print @Defined@ if @key@ is defined in the +-- context and @Non-defined@ otherwise. The @$else$@ clause is +-- optional. +-- +-- * @$for(key)$@ +-- +-- The @for@ macro is used for enumerating 'Context' elements that are +-- lists, i.e. constructed using the 'listField' function. Assume that +-- in a context we have an element @listField \"key\" c itms@. Then +-- the snippet +-- +-- > $for(key)$ +-- > $x$ +-- > $sep$, +-- > $endfor$ +-- +-- would, for each item @i@ in 'itms', lookup @$x$@ in the context @c@ +-- with item @i@, interpolate it, and join the resulting list with +-- @,@. +-- +-- Another concrete example one may consider is the following. Given the +-- context +-- +-- > listField "things" (field "thing" (return . itemBody)) +-- > (sequence [makeItem "fruits", makeItem "vegetables"]) +-- +-- and a template +-- +-- > I like +-- > $for(things)$ +-- > fresh $thing$$sep$, and +-- > $endfor$ +-- +-- the resulting page would look like +-- +-- > <p> +-- > I like +-- > +-- > fresh fruits, and +-- > +-- > fresh vegetables +-- > </p> +-- +-- The @$sep$@ part can be omitted. Usually, you can get by using the +-- 'applyListTemplate' and 'applyJoinListTemplate' functions. +-- +-- * @$partial(path)$@ +-- +-- Loads a template located in a separate file and interpolates it +-- under the current context. +-- +-- Assuming that the file @test.html@ contains +-- +-- > <b>$key$</b> +-- +-- The result of rendering +-- +-- > <p> +-- > $partial("test.html")$ +-- > </p> +-- +-- is the same as the result of rendering +-- +-- > <p> +-- > <b>$key$</b> +-- > </p> +-- +-- That is, calling @$partial$@ is equivalent to just copying and pasting +-- template code. +-- + module Hakyll.Web.Template ( Template , templateCompiler |