initial commit of jade/pug highlighter

rc/extra/pug.kak

@@ -0,0 +1,83 @@
+# Note: jade is changing its name to pug (https://github.com/pugjs/pug/issues/2184)
+# This appears to be a work in progress -- the pug-lang domain is parked, while
+# the jade-lang one is active. This highlighter will recognize .pug and .jade extensions,
+
+# http://jade-lang.com (will be http://pug-lang.com)
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufSetOption mimetype=text/x-pug %{
+    set buffer filetype pug
+}
+
+hook global BufCreate .*[.](pug|jade) %{
+    set buffer filetype pug
+}
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+addhl -group / regions -default code pug                 \
+		text          ^\h*\|\s     $                      '' \
+    text          ^\h*([A-Za-z][A-Za-z0-9_-]*)?(\#[A-Za-z][A-Za-z0-9_-]*)?((?:\.[A-Za-z][A-Za-z0-9_-]*)*)?(?<=\S)\h+\K.* $ '' \
+		javascript    ^\h*[-=!]    $                      '' \
+    double_string '"'          (?:(?<!\\)(\\\\)*"|$)  '' \
+    single_string "'"          (?:(?<!\\)(\\\\)*'|$)  '' \
+    comment       //           $                      '' \
+	  attribute    \(            \)                     \( \
+    puglang      ^\h*\<(\block|extends|include|append|prepend|if|unless|else|case|when|default|each|while|mixin)\> $ '' \
+
+# Filters
+# ‾‾‾‾‾‾‾
+
+addhl -group /pug/double_string    fill    string
+addhl -group /pug/single_string    fill    string
+addhl -group /pug/comment          fill    comment
+addhl -group /pug/javascript       ref     javascript
+addhl -group /pug/attribute        ref     javascript
+addhl -group /pug/puglang          ref     javascript
+addhl -group /pug/puglang          regex   \<(\block|extends|include|append|prepend|if|unless|else|case|when|default|each|while|mixin|of|in)\> 0:keyword
+addhl -group /pug/attribute        regex   [()=]                             0:operator
+addhl -group /pug/text             regex   \h*(\|)                           1:meta
+addhl -group /pug/code             regex   ^\h*([A-Za-z][A-Za-z0-9_-]*)      1:type
+addhl -group /pug/code             regex   (\#[A-Za-z][A-Za-z0-9_-]*)        1:identifier
+addhl -group /pug/code             regex   ((?:\.[A-Za-z][A-Za-z0-9_-]*)*)   1:value
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+def -hidden _pug_filter_around_selections %{
+    # remove trailing white spaces
+    try %{ exec -draft -itersel <a-x> s \h+$ <ret> d }
+}
+
+def -hidden _pug_indent_on_new_line %{
+    eval -draft -itersel %{
+        # preserve previous line indent
+        try %{ exec -draft <space> K <a-&> }
+        # filter previous line
+        try %{ exec -draft k : _pug_filter_around_selections <ret> }
+        # copy '//', '|', '-' or '(!)=' prefix and following whitespace
+        try %{ exec -draft k x s ^\h*\K[/|!=-]{1,2}\h* <ret> y j p }
+        # indent unless we copied something above
+        try %{ exec -draft <a-gt> <space> b s \S <ret> g l <a-lt> }
+    }
+}
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=pug %{
+    addhl ref pug
+
+    hook window InsertEnd  .* -group pug-hooks  _pug_filter_around_selections
+    hook window InsertChar \n -group pug-indent _pug_indent_on_new_line
+}
+
+hook global WinSetOption filetype=(?!pug).* %{
+    rmhl pug
+    rmhooks window pug-indent
+    rmhooks window pug-hooks
+}