Slim template language syntax highlighting

plugins/language_slim.lua

@@ -0,0 +1,261 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+syntax.add {
+  name = "Slim template language",
+  files = { "%.slim$", "%.skim$" },
+  comment = "/",
+  patterns = {
+    {
+      -- Embedded engine blocks (indented content until next non-indented line).
+      -- Matches:
+      --   ruby:
+      --     body { color: red }
+      pattern = { "^%s*ruby:%s*[^\n]*", "^%S" },
+      syntax = ".rb",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   css:
+      --     body { color: red }
+      pattern = { "^%s*css:%s*[^\n]*", "^%S" },
+      syntax = ".css",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   sass:
+      --     $c: #fff
+      --     body
+      --       color: $c
+      pattern = { "^%s*sass:%s*[^\n]*", "^%S" },
+      syntax = ".sass",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   styl:
+      --     body
+      --       color red
+      pattern = { "^%s*styl:%s*[^\n]*", "^%S" },
+      syntax = ".styl",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   scss:
+      --     $c: #fff;
+      --     body { color: $c; }
+      pattern = { "^%s*scss:%s*[^\n]*", "^%S" },
+      syntax = ".scss",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   coffee:
+      --     alert "hi"
+      pattern = { "^%s*coffee:%s*[^\n]*", "^%S" },
+      syntax = ".coffee",
+      type = "function",
+    },
+    {
+      -- Matches:
+      --   javascript:
+      --     console.log("hi")
+      pattern = { "^%s*javascript:%s*[^\n]*", "^%S" },
+      syntax = ".js",
+      type = "function",
+    },
+
+    {
+      -- Slim block comment: a slash line with nested indented lines.
+      -- Matches:
+      --   / This is a comment block
+      --     still commented
+      regex = "^%s*/%S[^\n]*$",
+      type = "comment",
+    },
+    {
+      -- Slim line comment: slash at line start, no indentation block.
+      -- Matches:
+      --   /just a comment
+      pattern = { "^%s*/%s*", "\n" },
+      -- regex = "^%s*/%S[^\n]*$",
+      type = "comment",
+    },
+
+    {
+      -- Escaped content block: literal text starting with | or ' then space/tab.
+      -- Matches:
+      --   | literal <b>not a tag</b> #{user.name}
+      --     continued line
+      pattern = { "^%s*[|']%s", "^%S" },
+      type = "normal",
+      syntax = ".html",
+    },
+
+    {
+      -- Ruby logic line (control flow): lines starting with "-".
+      -- Matches:
+      --   - if user
+      --   - user.items.each do |i|
+      pattern = { "^%s*%-%s*", "\n" },
+      syntax = ".rb",
+      type = "function",
+    },
+    {
+      -- Ruby output line: lines starting with "=" or "==".
+      -- Matches:
+      --   = user.name
+      --   == render("partial")
+      pattern = { "^%s*==?%s*", "\n" },
+      syntax = ".rb",
+      type = "function",
+    },
+    {
+      -- Ruby interpolation inside text: #{ ... } (best-effort; nested braces not handled).
+      -- Matches:
+      --   | Hello #{current_user.name}!
+      regex = { "(?<!\\\\)#\\{", "\\}" },
+      syntax = ".rb",
+      type = "function",
+    },
+
+    {
+      -- Enclosed tag params: `tag[...]` with ruby-ish params.
+      -- Matches:
+      --   a[href=user_path(user)]
+      regex = { "([A-Za-z][%w.#-]*%w)\\[", "\\]" },
+      type = "function",
+      patterns = {
+        {
+          -- Attribute name.
+          -- Matches:
+          --   a[href=...]
+          regex = "(?:^|[\\s\\[{(])()\\w[\\w:-]*(?==)",
+          type = "keyword2",
+        },
+        {
+          -- Attribute value (ruby expression), starting right after '=' with no space.
+          -- Matches:
+          --   a[href=user_path(user)]
+          regex = "=(?!\\s)([^\\s\\]\\}):)]*)",
+          syntax = ".rb",
+          type = "string",
+        },
+        {
+          -- Any ruby content inside params.
+          -- Matches:
+          --   div[data={a: 1, b: foo()}]
+          regex = "[^\\]\\n]+",
+          syntax = ".rb",
+          type = "string",
+        },
+      },
+    },
+    {
+      -- Enclosed tag params: `tag{...}` with ruby-ish params.
+      -- Matches:
+      --   div{data: {a: 1}}
+      regex = { "([A-Za-z][%w.#-]*%w)\\{", "\\}" },
+      type = "function",
+      syntax = ".rb",
+    },
+    {
+      -- Enclosed tag params: `tag(...)` with ruby-ish params.
+      -- Matches:
+      --   input(type="text" value=user.name)
+      regex = { "([A-Za-z][%w.#-]*%w)\\(", "\\)" },
+      type = "function",
+      syntax = ".rb",
+    },
+
+    {
+      -- Unenclosed tag at start of line (best-effort).
+      -- Matches:
+      --   div class="a"
+      --   .btn#save
+      regex = "^%s*([A-Za-z.#][%w.#-]*%w)",
+      type = "function",
+    },
+
+    {
+      -- Illegal line (TextMate's "illegal" rule): line starts with a character
+      -- that doesn't look like Slim markup.
+      -- Matches:
+      --   @@@
+      regex = "^%s*[^%w=%.#|\\'%-][^\n]*$",
+      type = "comment",
+    },
+
+    {
+      -- Doctype.
+      -- Matches:
+      --   doctype html
+      pattern = "doctype%s+%S+",
+      type = "keyword",
+    },
+
+    {
+      -- Double-quoted string.
+      -- Matches:
+      --   a href="x"
+      pattern = { '"', '"', '\\' },
+      type = "string",
+    },
+    {
+      -- Single-quoted string.
+      -- Matches:
+      --   a href='x'
+      pattern = { "'", "'", '\\' },
+      type = "string",
+    },
+
+    {
+      -- ID shorthand.
+      -- Matches:
+      --   #main
+      pattern = "#[%a][%w_-]*",
+      type = "keyword2",
+    },
+    {
+      -- Class shorthand.
+      -- Matches:
+      --   .btn.primary
+      pattern = "%.[%a][%w_.-]*",
+      type = "keyword2",
+    },
+    {
+      -- Attribute-like name before '=' (best-effort).
+      -- Matches:
+      --   href=
+      pattern = "[%a][%w_-]*%s*=",
+      type = "keyword",
+    },
+    {
+      -- Numbers.
+      -- Matches:
+      --   123
+      --   -12.5
+      pattern = "-?%d+[%d%.]*",
+      type = "number",
+    },
+    {
+      -- Generic identifiers (best-effort fallback).
+      -- Matches:
+      --   div
+      --   render
+      pattern = "[%a][%w]*",
+      type = "function",
+    },
+    {
+      -- Operators/punctuation common in Slim.
+      -- Matches:
+      --   . # = / ( ) [ ] { } | :
+      pattern = "[.#=/()%[%]{}|:]",
+      type = "operator",
+    },
+  },
+  symbols = {},
+}