fix: Add first working example

lua/telescope/_extensions/last_positions.lua

@@ -0,0 +1,131 @@
+local finders = require "telescope.finders"
+local make_entry = require "telescope.make_entry"
+local Path = require "plenary.path"
+local pickers = require "telescope.pickers"
+local last_positions = require"smoothcursor.last_positions"
+local entry_display = require "telescope.pickers.entry_display"
+local utils = require "telescope.utils"
+local strings = require "plenary.strings"
+
+local conf = require("telescope.config").values
+
+local DEFAULT_MODE_ICON_MAP = {
+    v = " ",
+    V = "",
+    i = "",
+    R = "󰊄",
+}
+
+-- Makes sure aliased options are set correctly
+local function apply_cwd_only_aliases(opts)
+  local has_cwd_only = opts.cwd_only ~= nil
+  local has_only_cwd = opts.only_cwd ~= nil
+
+  if has_only_cwd and not has_cwd_only then
+    -- Internally, use cwd_only
+    opts.cwd_only = opts.only_cwd
+    opts.only_cwd = nil
+  end
+
+  return opts
+end
+
+return require"telescope".register_extension {
+    setup = function() end,
+    exports = {
+        last_positions = function(opts)
+            opts = apply_cwd_only_aliases(opts)
+            local results = {}
+
+            for buffer_raw, last_positions_for_buffer in pairs(last_positions.last_positions) do
+                local buffer = tonumber(buffer_raw)
+
+                local info = vim.fn.getbufinfo(buffer)[1]
+                for mode, pos in pairs(last_positions_for_buffer) do
+                    local line = pos[1]
+
+                    local element = {
+                        bufnr = buffer,
+                        info = info,
+                        indicator = DEFAULT_MODE_ICON_MAP[mode] or mode,
+                        lnum = line,
+                    }
+
+                    table.insert(results, element)
+                end
+            end
+
+            if not opts.bufnr_width then
+                local max_bufnr = math.max(
+                    unpack(
+                        vim.tbl_map(
+                            function (buffer) return buffer.bufnr end,
+                            results
+                        )
+                    )
+                )
+                opts.bufnr_width = #tostring(max_bufnr)
+            end
+
+            -- Adapted from https://github.com/nvim-telescope/telescope.nvim/blob/da8b3d485975a8727bea127518b65c980521ae22/lua/telescope/make_entry.lua#L574
+            local disable_devicons = opts.disable_devicons
+
+            local icon_width = 0
+            if not disable_devicons then
+                local icon, _ = utils.get_devicons("fname", disable_devicons)
+                icon_width = strings.strdisplaywidth(icon)
+            end
+
+            local displayer = entry_display.create {
+                separator = " ",
+                items = {
+                    { width = opts.bufnr_width },
+                    { width = 4 },
+                    { width = icon_width },
+                    { remaining = true },
+                },
+            }
+
+            local cwd = vim.fn.expand(opts.cwd or vim.loop.cwd())
+
+            local make_display = function(entry)
+                opts.__prefix = opts.bufnr_width + 4 + icon_width + 3 + 1 + #tostring(entry.lnum)
+                local display_bufname = utils.transform_path(opts, entry.filename)
+                local icon, hl_group = utils.get_devicons(entry.filename, disable_devicons)
+
+                return displayer {
+                    { entry.bufnr, "TelescopeResultsNumber" },
+                    { entry.indicator, "TelescopeResultsComment" },
+                    { icon, hl_group },
+                    display_bufname .. ":" .. entry.lnum,
+                }
+            end
+
+            pickers
+            .new(opts, {
+                prompt_title = "Last Positions",
+                finder = finders.new_table {
+                    results = results,
+                    entry_maker = function(entry)
+                        local bufname = entry.info.name ~= "" and entry.info.name or "[No Name]"
+                        -- if bufname is inside the cwd, trim that part of the string
+                        bufname = Path:new(bufname):normalize(cwd)
+
+                        return make_entry.set_default_entry_mt({
+                            value = bufname,
+                            ordinal = entry.bufnr .. " : " .. bufname,
+                            display = make_display,
+
+                            bufnr = entry.bufnr,
+                            filename = bufname,
+                            lnum = entry.lnum,
+                            indicator = entry.indicator,
+                        }, opts)
+                    end
+                },
+                previewer = conf.grep_previewer(opts),
+                sorter = conf.generic_sorter(opts),
+            }):find()
+        end
+    }
+}