Pulled language_nelua directly into the main repo, as the original repository that held this language plugin was deleted.

1 files changed, 119 insertions, 0 deletions

diff --git a/plugins/language_nelua.lua b/plugins/language_nelua.lua
new file mode 100644
index 0000000..c29d969
--- /dev/null
+++ b/plugins/language_nelua.lua
@@ -0,0 +1,119 @@
+-- mod-version:3
+
+-- to better understand these comments, see this section from rxi's article
+-- https://rxi.github.io/lite_an_implementation_overview.html#syntax_highlighting
+
+-- first, we need to require the syntax module
+local syntax = require "core.syntax"
+
+--[[
+  then, we'll add a new syntax to the syntax module, lite-xl matches Lua patterns
+  against the source code in order to highlight the code.
+]]
+syntax.add {
+  -- the extension of source code
+  files = "%.nelua$",
+  -- this add support for shebang, is not rare to add #!/usr/local/bin/lua to make
+  -- lua scripts executable, here we add support for it for nelua
+  headers = "^#!.*[ /]nelua",
+  -- tells to lite how to toggle comments
+  comment = "--",
+  -- finally the patterns, is a table of tables,
+  -- each entry is a table with some fields, especially with "pattern" and "type" fields.
+  patterns = {
+    --[[
+      ["pattern"] field:
+      Describes a syntax pattern, this is done with Lua Patterns
+      you can learn it works here: https://www.lua.org/manual/5.4/manual.html#6.4.1
+
+      The pattern can be a string or a table, when is a string, then is just a
+      pattern that match everything, when is a table, then it follows this
+      logic:
+      { range_start_pattern, range_end_pattern [, escape_character] }
+
+      The matched range_start_pattern and range_end_pattern text will be highlighted, but the
+      text between them will not.
+
+      ["syntax"] field:
+      Optional field, when set, the text between matched ranges will use syntax from another language,
+      a good common known example of this is using javascript syntax inside a `script` element:
+      https://github.com/lite-xl/lite-xl/blob/df667ad28e9995f8cb79dab64e6039f095c202f4/data/plugins/language_html.lua#L17-L23
+
+      ["type"] field:
+      Set the style that should be used, this is defined on the "style" file from
+      the lite-xl's source, at "data/core/style.lua".
+    ]]
+    {
+      pattern = {"##%[=*%[", "%]=*%]"},
+      syntax = ".lua",
+      type = "function",
+    },
+    {
+      pattern = {"#|", "|#"},
+      syntax = ".lua",
+      type = "function",
+    },
+    {
+      pattern = {"##", "\n"},
+      syntax = ".lua",
+      type = "function",
+    },
+    { pattern = { '"', '"', '\\' },           type = "string" },
+    { pattern = { "'", "'", '\\' },           type = "string" },
+    { pattern = { "%[%[", "%]%]" },           type = "string" },
+    { pattern = { "%-%-%[=*%[", "%]=*%]"},    type = "comment" },
+    { pattern = "%-%-.-\n",                   type = "comment" },
+    { pattern = "0x%x+%.%x*[pP][-+]?%d+",     type = "number" },
+    { pattern = "0x%x+%.%x*",                 type = "number" },
+    { pattern = "0x%.%x+[pP][-+]?%d+",        type = "number" },
+    { pattern = "0x%.%x+",                    type = "number" },
+    { pattern = "0x%x+[pP][-+]?%d+",          type = "number" },
+    { pattern = "0x%x+",                      type = "number" },
+    { pattern = "%d%.%d*[eE][-+]?%d+",        type = "number" },
+    { pattern = "%d%.%d*",                    type = "number" },
+    { pattern = "%.?%d*[eE][-+]?%d+",         type = "number" },
+    { pattern = "<%S[%w+%._,%s*'\"()<>]-%S>", type = "keyword2" },
+    { pattern = "%.?%d+",                     type = "number" },
+    { pattern = "%.%.%.?",                    type = "operator" },
+    { pattern = "[<>~=]=",                    type = "operator" },
+    { pattern = "[%+%-=/%*%^%%#<>]",          type = "operator" },
+    { pattern = "[%a_][%w_]*()%s*%f[(\"'{]",  type = {"function", "normal"} },
+    { pattern = "[%a_][%w_]*",                type = "symbol" },
+    { pattern = "::[%a_][%w_]*::",            type = "function" },
+  },
+  -- special symbols, like keywords
+  symbols = {
+    -- lua symbols
+    ["if"]       = "keyword",
+    ["then"]     = "keyword",
+    ["else"]     = "keyword",
+    ["elseif"]   = "keyword",
+    ["end"]      = "keyword",
+    ["do"]       = "keyword",
+    ["function"] = "keyword",
+    ["repeat"]   = "keyword",
+    ["until"]    = "keyword",
+    ["while"]    = "keyword",
+    ["for"]      = "keyword",
+    ["break"]    = "keyword",
+    ["return"]   = "keyword",
+    ["local"]    = "keyword",
+    ["in"]       = "keyword",
+    ["not"]      = "keyword",
+    ["and"]      = "keyword",
+    ["or"]       = "keyword",
+    ["goto"]     = "keyword",
+    ["self"]     = "keyword2",
+    ["true"]     = "literal",
+    ["false"]    = "literal",
+    ["nil"]      = "literal",
+
+    -- nelua symbols
+    ["global"]   = "keyword",
+    ["switch"]   = "keyword",
+    ["case"]     = "keyword",
+    ["defer"]    = "keyword",
+    ["continue"] = "keyword",
+    ["nilptr"]   = "keyword",
+  },
+}