Merge pull request #1 from rxi/master

Update from upstream

6 files changed, 235 insertions, 49 deletions

diff --git a/README.md b/README.md
index 502e1ed..3701607 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@ Plugin | Description
 [`language_ksy`](https://raw.githubusercontent.com/whiteh0le/lite-plugins/main/plugins/language_ksy.lua?raw=1) | Syntax for [Kaitai](http://kaitai.io/) struct files
 [`language_make`](plugins/language_make.lua?raw=1) | Syntax for the Make build system language
 [`language_meson`](plugins/language_meson.lua?raw=1) | Syntax for the [Meson](https://mesonbuild.com) build system language
+[`language_nim`](plugins/language_nim.lua?raw=1) | Syntax for the [Nim](https://nim-lang.org) programming language
 [`language_odin`](plugins/language_odin.lua?raw=1) | Syntax for the [Odin](https://github.com/odin-lang/Odin) programming language
 [`language_php`](plugins/language_php.lua?raw=1) | Syntax for the [PHP](https://php.net) programming language
 [`language_pico8`](plugins/language_pico8.lua?raw=1) | Syntax for [Pico-8](https://www.lexaloffle.com/pico-8.php) cartridge files
@@ -73,6 +74,7 @@ Plugin | Description
 [`openfilelocation`](plugins/openfilelocation.lua?raw=1) | Opens the parent directory of the current file in the file manager
 [`openselected`](plugins/openselected.lua?raw=1) | Opens the selected filename or url
 [`projectmanager`](plugins/projectmanager.lua?raw=1) | Save projects and load/reload them quickly
+[`rainbowparen`](plugins/rainbowparen.lua?raw=1) | Show nesting of parentheses with rainbow colours
 [`scale`](plugins/scale.lua?raw=1) | Provides support for dynamically adjusting the scale of the code font / UI (`ctrl+-`, `ctrl+=`)
 [`scalestatus`](plugins/scalestatus.lua?raw=1) | Displays current scale (zoom) in status view (depends on scale plugin)
 [`selectionhighlight`](plugins/selectionhighlight.lua?raw=1) | Highlights regions of code that match the current selection *([screenshot](https://user-images.githubusercontent.com/3920290/80710883-5f597c80-8ae7-11ea-97f0-76dfacc08439.png))*
diff --git a/plugins/language_go.lua b/plugins/language_go.lua
index 488725f..dffbaf9 100644
--- a/plugins/language_go.lua
+++ b/plugins/language_go.lua
@@ -19,53 +19,54 @@ syntax.add {
     { pattern = "[%a_][%w_]*",          type = "symbol"   },
   },
   symbols = {
-    ["if"]         = "keyword",
-    ["else"]       = "keyword",
-    ["elseif"]     = "keyword",
-    ["for"]        = "keyword",
-    ["continue"]   = "keyword",
-    ["return"]     = "keyword",
-    ["struct"]     = "keyword",
-    ["switch"]     = "keyword",
-    ["case"]       = "keyword",
-    ["default"]    = "keyword",
-    ["const"]      = "keyword",
-    ["package"]    = "keyword",
-    ["import"]     = "keyword",
-    ["func"]       = "keyword",
-    ["var"]        = "keyword",
-    ["type"]       = "keyword",
-    ["interface"]  = "keyword",
-    ["select"]     = "keyword",
-    ["break"]      = "keyword",
-    ["range"]      = "keyword",
-    ["chan"]       = "keyword",
-    ["defer"]      = "keyword",
-    ["go"]         = "keyword",
-    ["int"]        = "keyword2",
-    ["int64"]      = "keyword2",
-    ["int32"]      = "keyword2",
-    ["int16"]      = "keyword2",
-    ["int8"]       = "keyword2",
-    ["uint"]       = "keyword2",
-    ["uint64"]     = "keyword2",
-    ["uint32"]     = "keyword2",
-    ["uint16"]     = "keyword2",
-    ["uint8"]      = "keyword2",
-    ["uintptr"]    = "keyword2",
-    ["float64"]    = "keyword2",
-    ["float32"]    = "keyword2",
-    ["map"]        = "keyword2",
-    ["string"]     = "keyword2",
-    ["rune"]       = "keyword2",
-    ["bool"]       = "keyword2",
-    ["byte"]       = "keyword2",
-    ["error"]      = "keyword2",
-    ["complex64"]  = "keyword2",
-    ["complex128"] = "keyword2",
-    ["true"]       = "literal",
-    ["false"]      = "literal",
-    ["nil"]        = "literal",
+    ["if"]          = "keyword",
+    ["else"]        = "keyword",
+    ["elseif"]      = "keyword",
+    ["for"]         = "keyword",
+    ["continue"]    = "keyword",
+    ["return"]      = "keyword",
+    ["struct"]      = "keyword",
+    ["switch"]      = "keyword",
+    ["case"]        = "keyword",
+    ["default"]     = "keyword",
+    ["const"]       = "keyword",
+    ["package"]     = "keyword",
+    ["import"]      = "keyword",
+    ["func"]        = "keyword",
+    ["var"]         = "keyword",
+    ["type"]        = "keyword",
+    ["interface"]   = "keyword",
+    ["select"]      = "keyword",
+    ["break"]       = "keyword",
+    ["range"]       = "keyword",
+    ["chan"]        = "keyword",
+    ["defer"]       = "keyword",
+    ["go"]          = "keyword",
+    ["fallthrough"] = "keyword",
+    ["int"]         = "keyword2",
+    ["int64"]       = "keyword2",
+    ["int32"]       = "keyword2",
+    ["int16"]       = "keyword2",
+    ["int8"]        = "keyword2",
+    ["uint"]        = "keyword2",
+    ["uint64"]      = "keyword2",
+    ["uint32"]      = "keyword2",
+    ["uint16"]      = "keyword2",
+    ["uint8"]       = "keyword2",
+    ["uintptr"]     = "keyword2",
+    ["float64"]     = "keyword2",
+    ["float32"]     = "keyword2",
+    ["map"]         = "keyword2",
+    ["string"]      = "keyword2",
+    ["rune"]        = "keyword2",
+    ["bool"]        = "keyword2",
+    ["byte"]        = "keyword2",
+    ["error"]       = "keyword2",
+    ["complex64"]   = "keyword2",
+    ["complex128"]  = "keyword2",
+    ["true"]        = "literal",
+    ["false"]       = "literal",
+    ["nil"]         = "literal",
   },
 }
 
diff --git a/plugins/language_nim.lua b/plugins/language_nim.lua
new file mode 100644
index 0000000..af230e4
--- /dev/null
+++ b/plugins/language_nim.lua
@@ -0,0 +1,120 @@
+local syntax = require "core.syntax"
+
+local patterns = {}
+
+local symbols = {
+  ["nil"] = "literal",
+  ["true"] = "literal",
+  ["false"] = "literal",
+}
+
+local number_patterns = {
+  "0[bB][01][01_]*",
+  "0o[0-7][0-7_]*",
+  "0[xX]%x[%x_]*",
+  "%d[%d_]*%.%d[%d_]*[eE][-+]?%d[%d_]*",
+  "%d[%d_]*%.%d[%d_]*",
+  "%d[%d_]*",
+}
+
+local type_suffix_patterns = {}
+
+for _, size in ipairs({"", "8", "16", "32", "64"}) do
+  table.insert(type_suffix_patterns, "'?[fuiFUI]"..size)
+end
+
+for _, pattern in ipairs(number_patterns) do
+  for _, suffix in ipairs(type_suffix_patterns) do
+    table.insert(patterns, { pattern = pattern..suffix, type = "literal" })
+  end
+  table.insert(patterns, { pattern = pattern, type = "literal" })
+end
+
+local keywords = {
+  "addr", "and", "as", "asm",
+  "bind", "block", "break",
+  "case", "cast", "concept", "const", "continue", "converter",
+  "defer", "discard", "distinct", "div", "do",
+  "elif", "else", "end", "enum", "except", "export",
+  "finally", "for", "from", "func",
+  "if", "import", "in", "include", "interface", "is", "isnot", "iterator",
+  "let",
+  "macro", "method", "mixin", "mod",
+  "not", "notin",
+  "object", "of", "or", "out",
+  "proc", "ptr",
+  "raise", "ref", "return",
+  "shl", "shr", "static",
+  "template", "try", "tuple", "type",
+  "using",
+  "var",
+  "when", "while",
+  "xor",
+  "yield",
+}
+
+for _, keyword in ipairs(keywords) do
+  symbols[keyword] = "keyword"
+end
+
+local standard_types = {
+  "bool", "byte",
+  "int", "int8", "int16", "int32", "int64",
+  "uint", "uint8", "uint16", "uint32", "uint64",
+  "float", "float32", "float64",
+  "char", "string", "cstring",
+  "pointer",
+  "typedesc",
+  "void", "auto", "any",
+  "untyped", "typed",
+  "clong", "culong", "cchar", "cschar", "cshort", "cint", "csize", "csize_t",
+  "clonglong", "cfloat", "cdouble", "clongdouble", "cuchar", "cushort",
+  "cuint", "culonglong", "cstringArray",
+}
+
+for _, type in ipairs(standard_types) do
+  symbols[type] = "keyword2"
+end
+
+local standard_generic_types = {
+  "range",
+  "array", "open[aA]rray", "varargs", "seq", "set",
+  "sink", "lent", "owned",
+}
+
+for _, type in ipairs(standard_generic_types) do
+  table.insert(patterns, { pattern = type.."%f[%[]", type = "keyword2" })
+  table.insert(patterns, { pattern = type.." +%f[%w]", type = "keyword2" })
+end
+
+local user_patterns = {
+  -- comments
+  { pattern = { "##?%[", "]##?" },            type = "comment" },
+  { pattern = "##?.-\n",                      type = "comment" },
+  -- strings and chars
+  { pattern = { '"', '"', '\\' },             type = "string" },
+  { pattern = { '"""', '"""[^"]' },           type = "string" },
+  { pattern = { "'", "'", '\\' },             type = "literal" },
+  -- function calls
+  { pattern = "[a-zA-Z][a-zA-Z0-9_]*%f[(]",   type = "function" },
+  -- identifiers
+  { pattern = "[A-Z][a-zA-Z0-9_]*",           type = "keyword2" },
+  { pattern = "[a-zA-Z][a-zA-Z0-9_]*",        type = "symbol" },
+  -- operators
+  { pattern = "%.%f[^.]",                     type = "normal" },
+  { pattern = ":%f[ ]",                       type = "normal" },
+  { pattern = "[=+%-*/<>@$~&%%|!?%^&.:\\]+",  type = "operator" },
+}
+
+for _, pattern in ipairs(user_patterns) do
+  table.insert(patterns, pattern)
+end
+
+local nim = {
+  files = { "%.nim$", "%.nims$", "%.nimble$" },
+  comment = "#",
+  patterns = patterns,
+  symbols = symbols,
+}
+
+syntax.add(nim)
diff --git a/plugins/language_rust.lua b/plugins/language_rust.lua
index 321efc2..37ba81f 100644
--- a/plugins/language_rust.lua
+++ b/plugins/language_rust.lua
@@ -61,6 +61,7 @@ syntax.add {
     ["i128"]      = "keyword2",
     ["i16"]      = "keyword2",
     ["i8"]       = "keyword2",
+    ["u8"] 	= "keyword2",
     ["u16"]       = "keyword2",
     ["u32"]     = "keyword2",
     ["u64"]     = "keyword2",
@@ -70,6 +71,7 @@ syntax.add {
     ["f64"]    = "keyword2",
     ["f128"]    = "keyword2",
     ["String"]        = "keyword2",
+    ["char"] = "keyword2",
     ["&str"]     = "keyword2",
     ["bool"]       = "keyword2",
     ["true"]       = "literal",
diff --git a/plugins/lastproject.lua b/plugins/lastproject.lua
index 09ca507..5fb23bd 100644
--- a/plugins/lastproject.lua
+++ b/plugins/lastproject.lua
@@ -14,8 +14,10 @@ end
 
 -- save current project path
 local fp = io.open(last_project_filename, "w")
-fp:write(system.absolute_path ".")
-fp:close()
+if nil ~= fp then
+    fp:write(system.absolute_path ".")
+    fp:close()
+end
 
 
 -- restart using last project path if we had no commandline arguments and could
@@ -24,3 +26,4 @@ if #ARGS == 1 and project_path then
     system.exec(string.format("%s %q", EXEFILE, project_path))
     core.quit(true)
 end
+
diff --git a/plugins/rainbowparen.lua b/plugins/rainbowparen.lua
new file mode 100644
index 0000000..b2689f0
--- /dev/null
+++ b/plugins/rainbowparen.lua
@@ -0,0 +1,58 @@
+local tokenizer = require "core.tokenizer"
+local style = require "core.style"
+local common = require "core.common"
+
+local tokenize = tokenizer.tokenize
+local closers = {
+  ["("] = ")",
+  ["["] = "]",
+  ["{"] = "}"
+}
+local function parenstyle(parenstack)
+  return "paren" .. ((#parenstack % 5) + 1)
+end
+function tokenizer.tokenize(syntax, text, state)
+  state = state or {}
+  local res, istate = tokenize(syntax, text, state.istate)
+  local parenstack = state.parenstack or ""
+  local newres = {}
+  -- split parens out
+  -- the stock tokenizer can't do this because it merges identical adjacent tokens
+  for i, type, text in tokenizer.each_token(res) do
+    if type == "normal" or type == "symbol" then
+      for normtext1, paren, normtext2 in text:gmatch("([^%(%[{}%]%)]*)([%(%[{}%]%)]?)([^%(%[{}%]%)]*)") do
+        if #normtext1 > 0 then
+          table.insert(newres, type)
+          table.insert(newres, normtext1)
+        end
+        if #paren > 0 then
+          if paren == parenstack:sub(-1) then -- expected closer
+            parenstack = parenstack:sub(1, -2)
+            table.insert(newres, parenstyle(parenstack))
+          elseif closers[paren] then -- opener
+            table.insert(newres, parenstyle(parenstack))
+            parenstack = parenstack .. closers[paren]
+          else -- unexpected closer
+            table.insert(newres, "paren_unbalanced")
+          end
+          table.insert(newres, paren)
+        end
+        if #normtext2 > 0 then
+          table.insert(newres, type)
+          table.insert(newres, normtext2)
+        end
+      end
+    else
+      table.insert(newres, type)
+      table.insert(newres, text)
+    end
+  end
+  return newres, { parenstack = parenstack, istate = istate }
+end
+
+style.syntax.paren_unbalanced = style.syntax.paren_unbalanced or { common.color "#DC0408" }
+style.syntax.paren1  =  style.syntax.paren1 or { common.color "#FC6F71"}
+style.syntax.paren2  =  style.syntax.paren2 or { common.color "#fcb053"}
+style.syntax.paren3  =  style.syntax.paren3 or { common.color "#fcd476"}
+style.syntax.paren4  =  style.syntax.paren4 or { common.color "#52dab2"}
+style.syntax.paren5  =  style.syntax.paren5 or { common.color "#5a98cf"}