add a alone title

Author: cht

README.md

@@ -11,6 +11,8 @@ require("csvtools").setup({
 	-- this will clear the highlight of buf after move
 	showoverflow = true,
 	-- this will provide a overflow show
+	titelflow = true,
+	-- add an alone title
 
 })
 ```

lua/csvtools.lua

@@ -2,19 +2,11 @@ local api = vim.api
 local highlight = require("csvtools.highlight")
 local overflow = require("csvtools.overflowtext")
 local M = {
-    --winid = nil,
-    --buf = nil,
-    --mainwindowbuf = nil,
-    --header = {},
     before = 20,
     after = 20,
     clearafter = true,
     showoverflow = true,
-    --overflowtext = {
-    --    markid = nil,
-    --    ns_id = nil,
-    --    id = nil,
-    --},
+    titleflow = true,
 }
 -- buf's status
 local Status = {
@@ -136,6 +128,9 @@ function M.Highlight()
                 --highlight.highlight(M.mainwindowbuf, count)
                 count = count + 1
             end
+            if line - 2 > 0 and M.titleflow then
+                table.insert(Status.overflowtext, overflow.OverFlowTitle(line - 2, Status.header, 4))
+            end
         end
     end
 end

lua/csvtools/overflowtext.lua

@@ -54,4 +54,51 @@ function M.OverFlow(line_num, header, id)
         id = id,
     }
 end
+function M.OverFlowTitle(line_num, header, id)
+    local bnr = vim.fn.bufnr("%")
+    local line = unpack(vim.api.nvim_buf_get_lines(0, 0, 1, true))
+    local output = Split(line, ",")
+    for count = 1, #header do
+        if output[count] == nil then
+            output[count] = ""
+        end
+        local len = string.len(output[count])
+        if len < header[count] then
+            for _ = 1, header[count] - len do
+                output[count] = output[count] .. " "
+            end
+        elseif len > header[count] then
+            --print(len,"  ",header[count])
+            output[count] = output[count]:sub(1, header[count] - 2)
+            output[count] = output[count] .. ".."
+            --print("len=" , string.len(output[count]))
+        end
+        --print(header[count])
+    end
+    local virt_text = {}
+    for count = 1, #output do
+        if count % 2 == 0 then
+            table.insert(virt_text, { output[count], "WhidHeader" })
+        else
+            table.insert(virt_text, { output[count], "WhidSubHeader" })
+        end
+        table.insert(virt_text, { "|" })
+        --table.insert(virt_text,{text,"WhidHeader"})
+        --print(output[count])
+    end
+    local opts = {
+        end_line = 1,
+        id = id,
+        virt_text = virt_text,
+        virt_text_pos = "overlay",
+        -- virt_text_win_col = 20,
+    }
+    --highlighttop2(bnr, text)
+    --print("sss")
+    return {
+        markid = vim.api.nvim_buf_set_extmark(bnr, ns_id, line_num - 1, 0, opts),
+        ns_id = ns_id,
+        id = id,
+    }
+end
 return M