feat: add tabline

README.md

@@ -149,6 +149,11 @@ global_settings = {
 
     -- set marks specific to each git branch inside git repository
     mark_branch = false,
+
+    -- enable tabline with harpoon marks
+    tabline = false,
+    tabline_prefix = "   ",
+    tabline_suffix = "   ",
 }
 ```
 
@@ -208,6 +213,29 @@ require("harpoon").setup({
 })
 ```
 
+
+#### Tabline
+
+By default, the tabline will use the default theme of your theme.  You can customize by editing the following highlights:
+
+* HarpoonInactive
+* HarpoonActive
+* HarpoonNumberActive
+* HarpoonNumberInactive
+
+Example to make it cleaner:
+
+```lua
+vim.cmd('highlight! HarpoonInactive guibg=NONE guifg=#63698c')
+vim.cmd('highlight! HarpoonActive guibg=NONE guifg=white')
+vim.cmd('highlight! HarpoonNumberActive guibg=NONE guifg=#7aa2f7')
+vim.cmd('highlight! HarpoonNumberInactive guibg=NONE guifg=#7aa2f7')
+vim.cmd('highlight! TabLineFill guibg=NONE guifg=white')
+```
+
+Result: 
+![tabline](https://i.imgur.com/8i8mKJD.png) 
+
 ## ⇁ Social
 For questions about Harpoon, there's a #harpoon channel on [the Primagen's Discord](https://discord.gg/theprimeagen) server.  
 * [Discord](https://discord.gg/theprimeagen)

lua/harpoon/init.lua

@@ -210,6 +210,9 @@ function M.setup(config)
             ["tmux_autoclose_windows"] = false,
             ["excluded_filetypes"] = { "harpoon" },
             ["mark_branch"] = false,
+            ["tabline"] = false,
+            ["tabline_suffix"] = "   ",
+            ["tabline_prefix"] = "   ",
         },
     }, expand_dir(c_config), expand_dir(u_config), expand_dir(config))
 
@@ -217,7 +220,12 @@ function M.setup(config)
     -- an object for vim.loop.cwd()
     ensure_correct_config(complete_config)
 
+    if complete_config.tabline then
+        require("harpoon.tabline").setup(complete_config)
+    end
+
     HarpoonConfig = complete_config
+
     log.debug("setup(): Complete config", HarpoonConfig)
     log.trace("setup(): log_key", Dev.get_log_key())
 end

lua/harpoon/tabline.lua

@@ -0,0 +1,84 @@
+local Dev = require("harpoon.dev")
+local log = Dev.log
+
+local M = {}
+
+local function get_color(group, attr)
+    return vim.fn.synIDattr(vim.fn.synIDtrans(vim.fn.hlID(group)), attr)
+end
+
+
+local function shorten_filenames(filenames)
+    local shortened = {}
+
+    local counts = {}
+    for _, file in ipairs(filenames) do
+        local name = vim.fn.fnamemodify(file.filename, ":t")
+        counts[name] = (counts[name] or 0) + 1
+    end
+
+    for _, file in ipairs(filenames) do
+        local name = vim.fn.fnamemodify(file.filename, ":t")
+
+        if counts[name] == 1 then
+            table.insert(shortened, { filename = vim.fn.fnamemodify(name, ":t") })
+        else
+            table.insert(shortened, { filename = file.filename })
+        end
+    end
+
+    return shortened
+end
+
+function M.setup(opts)
+    function _G.tabline()
+        local original_tabs = require('harpoon').get_mark_config().marks
+        local tabs = shorten_filenames(original_tabs)
+        local tabline = ''
+
+        for i, tab in ipairs(original_tabs) do
+            local is_current = string.match(vim.fn.bufname(), tab.filename) or vim.fn.bufname() == tab.filename
+
+            local label = tabs[i].filename
+
+
+            if is_current then
+                tabline = tabline ..
+                    '%#HarpoonNumberActive#' .. (opts.tabline_prefix or '   ') .. i .. ' %*' .. '%#HarpoonActive#'
+            else
+                tabline = tabline ..
+                    '%#HarpoonNumberInactive#' .. (opts.tabline_prefix or '   ') .. i .. ' %*' .. '%#HarpoonInactive#'
+            end
+
+            tabline = tabline .. label .. (opts.tabline_suffix or '   ') .. '%*'
+            if i < #tabs then
+                tabline = tabline .. '%T'
+            end
+        end
+
+        return tabline
+    end
+
+    vim.opt.showtabline = 2
+
+    vim.o.tabline = '%!v:lua.tabline()'
+
+    vim.api.nvim_create_autocmd("ColorScheme", {
+        group = vim.api.nvim_create_augroup("harpoon", { clear = true }),
+        pattern = { "*" },
+        callback = function()
+            local color = get_color('HarpoonActive', 'bg#')
+
+            if (color == "" or color == nil) then
+                vim.api.nvim_set_hl(0, "HarpoonInactive", { link = "Tabline" })
+                vim.api.nvim_set_hl(0, "HarpoonActive", { link = "TablineSel" })
+                vim.api.nvim_set_hl(0, "HarpoonNumberActive", { link = "TablineSel" })
+                vim.api.nvim_set_hl(0, "HarpoonNumberInactive", { link = "Tabline" })
+            end
+        end,
+    })
+
+    log.debug("setup(): Tabline Setup", opts)
+end
+
+return M