feat(heirline): Implemented vim tabline

1 files changed, 95 insertions, 1 deletions

diff --git a/lua/plugins/heirline.lua b/lua/plugins/heirline.lua
index 00e0ca7..dcd7e7d 100644
--- a/lua/plugins/heirline.lua
+++ b/lua/plugins/heirline.lua
@@ -58,6 +58,11 @@ return {
 			}
 		end
 
+		function set_hl(name, val)
+			vim.api.nvim_set_hl(0, name, val)
+			return val
+		end
+
 		--[=[ Common elements ]=]--
 
 		local FileStat = {
@@ -159,10 +164,99 @@ return {
 			CursorChar, RightSep, FileType, Space, LineAndColumn
 		}
 
-		--[=[ Setup ]=]--
+		--[=[ Tabline ]=]--
+		local hl_TabLine     = set_hl("TabLine",     { ctermfg = 252, ctermbg = 242 })
+		local hl_TabLineSel  = set_hl("TabLineSel",  { ctermfg = 252, ctermbg = 235 })
+		local hl_TabLineFill = set_hl("TabLineFill", { ctermfg = 248, ctermbg = 238 })
+		set_hl("TabLineRFR",    { ctermfg = hl_TabLine.ctermbg,    ctermbg = hl_TabLineFill.ctermbg }) -- nonactive Right Full, Rightmost
+		set_hl("TabLineSelRF",  { ctermfg = hl_TabLineSel.ctermbg, ctermbg = hl_TabLine.ctermbg })     -- active Right Full
+		set_hl("TabLineSelRFR", { ctermfg = hl_TabLineSel.ctermbg, ctermbg = hl_TabLineFill.ctermbg }) -- active Right Full, Rightmost
+		set_hl("TabLineSelLF",  { ctermfg = hl_TabLine.ctermbg,    ctermbg = hl_TabLineSel.ctermbg })  -- active Left Full (left one's Right Full)
+
+		local TabPage = {
+			init = function(self)
+				self.pages = vim.api.nvim_list_tabpages()
+			end,
+			{
+				static = {
+					get_icon = require("nvim-web-devicons").get_icon,
+					ft_icon  = require("nvim-web-devicons").get_icon_by_filetype,
+					none_icon = "",
+				},
+				init = function(self)
+					self.bufnr = vim.api.nvim_win_get_buf(vim.api.nvim_tabpage_get_win(self.tabpage))
+				end,
+				provider = function(self)
+					--[==[ Filename ]==]--
+					local filename = vim.fn.fnamemodify(vim.api.nvim_buf_get_name(self.bufnr), ":t")
+					if #filename == 0 then filename = "[No Name]" end
+
+					local max_name_len = vim.o.columns / (5 + #self.pages)
+					filename = (self.get_icon(filename, vim.fn.fnamemodify(filename, ":e")) or self.ft_icon(vim.bo[self.bufnr].filetype) or self.none_icon) ..
+					           " " .. string.sub(filename, 1, max_name_len)
+
+					--[==[ Readonly ]==]--
+					local readonly = vim.bo[self.bufnr].readonly and " " or ""
 
+					--[==[ Modification ]==]--
+					local mod = vim.bo[self.bufnr].modified and " "
+								or (vim.bo[self.bufnr].modifiable and "" or " ")
+
+					--[==[ Tab ]==]--
+					return
+						"%" .. self.tabnr .. "T" ..
+						" " ..
+						filename .. readonly .. mod ..
+						" "
+				end,
+				hl = function(self)
+					if not self.is_active then
+						return "TabLine"
+					else
+						return "TabLineSel"
+					end
+				end,
+			},
+			{
+				init = function(self)
+					local activenr = vim.api.nvim_tabpage_get_number(vim.api.nvim_get_current_tabpage())
+
+					self.dist = self.tabnr - activenr
+					self.last = self.tabnr == #self.pages
+				end,
+				provider = function(self)
+					return (self.last or self.dist == -1 or self.dist == 0)
+					       and delimiters.FilledCircle[2] or delimiters.Circle[2]
+				end,
+				hl = function(self)
+					if not self.is_active then
+						return self.last and "TabLineRFR" or (self.dist == -1 and "TabLineSelLF" or "TabLine")
+					else
+						return self.last and "TabLineSelRFR" or "TabLineSelRF"
+					end
+				end,
+			},
+			{
+				provider = "%T"
+			}
+		}
+
+		local TabPages = {
+			-- only show this component if there's 2 or more tabpages
+			condition = function()
+				return #vim.api.nvim_list_tabpages() >= 2
+			end,
+			utils.make_tablist(TabPage),
+		}
+
+		local TabLine = {
+			TabPages,
+		}
+
+		--[=[ Setup ]=]--
 		return {
 			statusline = StatusLine,
+			tabline    = TabLine,
 		}
 	end,
 }