Add Groovy syntax highlighting support. (#410)

* WIP: added groovy keywords and some other things.

* Tidied up some things.

* Added block comment.

* Added some more comments.

* Added a few patterns.

* Fixed big types.

* Added entry to meta-languages package.

* Bumped meta_languages version.

* Removed shebang pattern.

* Update manifest.json

---------

Co-authored-by: Guldoman <giulio.lettieri@gmail.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/plugins/language_groovy.lua b/plugins/language_groovy.lua
new file mode 100644
index 0000000..8a3c5b8
--- /dev/null
+++ b/plugins/language_groovy.lua
@@ -0,0 +1,108 @@
+-- mod-version:3
+local syntax = require "core.syntax"
+
+syntax.add {
+  name = "Groovy",
+  files = { "%.groovy$" },
+  comment = "//",
+  block_comment = { "/*", "*/" },
+  patterns = {
+    { pattern = "//.*",                          type = "comment"  }, -- Single-line comment
+    { pattern = { "/%*", "%*/" },                type = "comment"  }, -- Multi-line comment
+    { pattern = { '"', '"', '\\' },              type = "string"   }, -- String, double quotes
+    { pattern = { "'", "'", '\\' },              type = "string"   }, -- String, apices
+    { pattern = { "%/", "%/", '\\' },            type = "string"   }, -- Slashy string
+    { pattern = { "%$%/", "%/%$", '\\' },        type = "string"   }, -- Dollar slashy string
+    { pattern = "'\\x%x?%x?%x?%x'",              type = "string"   }, -- character hexadecimal escape sequence
+    { pattern = "'\\u%x%x%x%x'",                 type = "string"   }, -- character unicode escape sequence
+    { pattern = "'\\?.'",                        type = "string"   }, -- character literal
+    { pattern = "-?0x%x+",                       type = "number"   }, -- ?
+    { pattern = "-?%d+[%d%.eE]*[a-zA-Z]?",       type = "number"   }, -- ?
+    { pattern = "-?%.?%d+",                      type = "number"   }, -- ?
+    { pattern = "-?[%d_+]+[a-zA-Z]?",            type = "number"   }, -- ?
+    { pattern = "[%+%-=/%*%^%%<>!~|&]",          type = "operator" }, -- Operators
+    { pattern = "[%a_][%w_]*%f[(]",              type = "function" }, -- Function/Class/Method/...
+    { pattern = "[%a_][%w_]*%f[%[]",             type = "function" }, -- Custom Type
+    { regex   = "[A-Z]+_?[A-Z]+",                type = "keyword2" }, -- Constants
+    { pattern = "[%a_][%w_]*",                   type = "symbol"   }, -- ?
+    { pattern = "[a-zA-Z]+%.+",                  type = "function" }, -- Lib path
+    -- TODO: .class.
+  },
+  symbols = {
+    -- Reserved keywords
+    ["abstract"]           = "keyword",
+    ["assert"]             = "keyword",
+    ["break"]              = "keyword",
+    ["case"]               = "keyword",
+    ["catch"]              = "keyword",
+    ["class"]              = "keyword",
+    ["const"]              = "keyword",
+    ["continue"]           = "keyword",
+    ["def"]                = "keyword",
+    ["default"]            = "keyword",
+    ["do"]                 = "keyword",
+    ["else"]               = "keyword",
+    ["enum"]               = "keyword",
+    ["extends"]            = "keyword",
+    ["final"]              = "keyword",
+    ["finally"]            = "keyword",
+    ["for"]                = "keyword",
+    ["goto"]               = "keyword",
+    ["if"]                 = "keyword",
+    ["implements"]         = "keyword",
+    ["import"]             = "keyword",
+    ["instanceof"]         = "keyword",
+    ["interface"]          = "keyword",
+    ["native"]             = "keyword",
+    ["new"]                = "keyword",
+    ["non-sealed"]         = "keyword",
+    ["package"]            = "keyword",
+    ["public"]             = "keyword",
+    ["protected"]          = "keyword",
+    ["private"]            = "keyword",
+    ["return"]             = "keyword",
+    ["static"]             = "keyword",
+    ["strictfp"]           = "keyword",
+    ["super"]              = "keyword",
+    ["switch"]             = "keyword",
+    ["synchronizedthis"]   = "keyword",
+    ["threadsafe"]         = "keyword",
+    ["throw"]              = "keyword",
+    ["throws"]             = "keyword",
+    ["transient"]          = "keyword",
+    ["try"]                = "keyword",
+    ["while"]              = "keyword",
+    
+    -- Contextual keywords
+    ["as"]                 = "keyword",
+    ["in"]                 = "keyword",
+    ["permitsrecord"]      = "keyword",
+    ["sealed"]             = "keyword",
+    ["trait"]              = "keyword",
+    ["var"]                = "keyword",
+    ["yields"]             = "keyword",
+    
+    -- ?
+    ["true"]               = "literal",
+    ["false"]              = "literal",
+    ["null"]               = "literal",
+    ["boolean"]            = "literal",
+
+    -- Types
+    ["char"]               = "keyword",
+    ["byte"]               = "keyword",
+    ["short"]              = "keyword",
+    ["int"]                = "keyword",
+    ["long"]               = "keyword",
+    ["float"]              = "keyword",
+    ["double"]             = "keyword",
+    
+    ["Integer"]            = "keyword",
+    ["BigInteger"]         = "keyword",
+    ["Long"]               = "keyword",
+    ["Float"]              = "keyword",
+    ["BigDecimal"]         = "keyword",
+    ["Double"]             = "keyword",
+    ["String"]             = "keyword",
+  },
+}