Minor fix for comment plugin and migrating to use "comment.type" option (zyedidia#3424)

Fixing comment plugin not using user settings when overriding default
setting,
Migrating comment plugin to use "comment.type" option instead

Author: Neko-Box-Coder

runtime/plugins/comment/comment.lua

@@ -3,6 +3,7 @@ VERSION = "1.0.0"
 local util = import("micro/util")
 local config = import("micro/config")
 local buffer = import("micro/buffer")
+local micro = import("micro")
 
 local ft = {}
 
@@ -61,17 +62,21 @@ ft["zig"] = "// %s"
 ft["zscript"] = "// %s"
 ft["zsh"] = "# %s"
 
-local last_ft
-
 function updateCommentType(buf)
-    if buf.Settings["commenttype"] == nil or (last_ft ~= buf.Settings["filetype"] and last_ft ~= nil) then
-        if ft[buf.Settings["filetype"]] ~= nil then
-            buf:SetOptionNative("commenttype", ft[buf.Settings["filetype"]])
+    -- NOTE: Using DoSetOptionNative to avoid LocalSettings[option] = true
+    -- so that "comment.type" can be reset by a "filetype" change to default.
+    if (buf.Settings["comment.type"] == "") then
+        -- NOTE: This won't get triggered if a filetype is change via `setlocal filetype`
+        -- since it is not registered with `RegisterGlobalOption()``
+        if buf.Settings["commenttype"] ~= nil then
+            buf:DoSetOptionNative("comment.type", buf.Settings["commenttype"])
         else
-            buf:SetOptionNative("commenttype", "# %s")
+            if (ft[buf.Settings["filetype"]] ~= nil) then
+                buf:DoSetOptionNative("comment.type", ft[buf.Settings["filetype"]])
+            else
+                buf:DoSetOptionNative("comment.type", "# %s")
+            end
         end
-
-        last_ft = buf.Settings["filetype"]
     end
 end
 
@@ -88,7 +93,7 @@ function commentLine(bp, lineN, indentLen)
     updateCommentType(bp.Buf)
 
     local line = bp.Buf:Line(lineN)
-    local commentType = bp.Buf.Settings["commenttype"]
+    local commentType = bp.Buf.Settings["comment.type"]
     local sel = -bp.Cursor.CurSelection
     local curpos = -bp.Cursor.Loc
     local index = string.find(commentType, "%%s") - 1
@@ -114,7 +119,7 @@ function uncommentLine(bp, lineN, commentRegex)
     updateCommentType(bp.Buf)
 
     local line = bp.Buf:Line(lineN)
-    local commentType = bp.Buf.Settings["commenttype"]
+    local commentType = bp.Buf.Settings["comment.type"]
     local sel = -bp.Cursor.CurSelection
     local curpos = -bp.Cursor.Loc
     local index = string.find(commentType, "%%s") - 1
@@ -178,7 +183,7 @@ end
 function comment(bp, args)
     updateCommentType(bp.Buf)
 
-    local commentType = bp.Buf.Settings["commenttype"]
+    local commentType = bp.Buf.Settings["comment.type"]
     local commentRegex = "^%s*" .. commentType:gsub("%%","%%%%"):gsub("%$","%$"):gsub("%)","%)"):gsub("%(","%("):gsub("%?","%?"):gsub("%*", "%*"):gsub("%-", "%-"):gsub("%.", "%."):gsub("%+", "%+"):gsub("%]", "%]"):gsub("%[", "%["):gsub("%%%%s", "(.*)")
 
     if bp.Cursor:HasSelection() then
@@ -204,6 +209,10 @@ function string.starts(String,Start)
     return string.sub(String,1,string.len(Start))==Start
 end
 
+function preinit()
+    config.RegisterCommonOption("comment", "type", "")
+end
+
 function init()
     config.MakeCommand("comment", comment, config.NoComplete)
     config.TryBindKey("Alt-/", "lua:comment.comment", false)

runtime/plugins/comment/help/comment.md

@@ -80,18 +80,23 @@ but it is only available for certain filetypes:
 * zsh: `# %s`
 
 If your filetype is not available here, you can simply modify
-the `commenttype` option:
+the `comment.type` option:
 
 ```
-set commenttype "/* %s */"
+set comment.type "/* %s */"
 ```
 
 Or in your `settings.json`:
 
 ```json
 {
     "*.c": {
-        "commenttype": "/* %s */"
+        "comment.type": "/* %s */"
     }
 }
 ```
+
+`commenttype` (without the dot) is the legacy option that is
+superseded by `comment.type`. `commenttype` is still supported
+but deprecated.
+**Use `comment.type` instead.**