Support path_display: filename_first (#195)

* feat:support path style

* chore: add types and comments to be readable

* fix: do not use the logic without 'filename_first'

---------

Co-authored-by: zhaogang <zhaogang@dustess.com>

lua/frecency/entry_maker.lua

@@ -49,12 +49,6 @@ end
 ---@param workspace_tag? string
 ---@return FrecencyEntryMakerInstance
 function EntryMaker:create(filepath_formatter, workspace, workspace_tag)
-  local displayer = entry_display.create {
-    separator = "",
-    hl_chars = { [Path.path.sep] = "TelescopePathSeparator" },
-    items = self:displayer_items(workspace, workspace_tag),
-  }
-
   return function(file)
     return {
       filename = file.path,
@@ -64,63 +58,67 @@ function EntryMaker:create(filepath_formatter, workspace, workspace_tag)
       ---@param entry FrecencyEntry
       ---@return table
       display = function(entry)
-        local items = self:items(entry, workspace, workspace_tag, filepath_formatter(workspace))
+        local items, width_items = self:items(entry, workspace, workspace_tag, filepath_formatter(workspace))
+
+        local displayer = entry_display.create {
+          separator = "",
+          hl_chars = { [Path.path.sep] = "TelescopePathSeparator" },
+          items = width_items,
+        }
+
         return displayer(items)
       end,
     }
   end
 end
 
----@private
----@param workspace? string
----@param workspace_tag? string
----@return table[]
-function EntryMaker:displayer_items(workspace, workspace_tag)
-  local items = {}
-  if config.show_scores then
-    table.insert(items, { width = 5 }) -- recency score
-    if config.matcher == "fuzzy" then
-      table.insert(items, { width = 5 }) -- index
-      table.insert(items, { width = 6 }) -- fuzzy score
-    end
-  end
-  if self.web_devicons.is_enabled then
-    table.insert(items, { width = 2 })
-  end
-  if config.show_filter_column and workspace and workspace_tag then
-    table.insert(items, { width = self:calculate_filter_column_width(workspace, workspace_tag) })
-  end
-  table.insert(items, { remaining = true })
-  return items
-end
-
 ---@private
 ---@param entry FrecencyEntry
 ---@param workspace? string
 ---@param workspace_tag? string
----@param formatter fun(filename: string): string
+---@param formatter fun(filename: string): string, FrecencyTelescopePathStyle[]
----@return table[]
+---@return table[], table[]
 function EntryMaker:items(entry, workspace, workspace_tag, formatter)
-  local items = {}
+  local items, width_items = {}, {}
   if config.show_scores then
     table.insert(items, { entry.score, "TelescopeFrecencyScores" })
+    table.insert(width_items, { width = 5 }) -- recency score
     if config.matcher == "fuzzy" then
       table.insert(items, { entry.index, "TelescopeFrecencyScores" })
+      table.insert(width_items, { width = 5 }) -- index
       local score = (not entry.fuzzy_score or entry.fuzzy_score == 0) and "0"
         or ("%.3f"):format(entry.fuzzy_score):sub(0, 5)
       table.insert(items, { score, "TelescopeFrecencyScores" })
+      table.insert(width_items, { width = 6 }) -- fuzzy score
     end
   end
   if self.web_devicons.is_enabled then
     table.insert(items, { self.web_devicons:get_icon(entry.name, entry.name:match "%a+$", { default = true }) })
+    table.insert(width_items, { width = 2 })
   end
   if config.show_filter_column and workspace and workspace_tag then
     local filtered = self:should_show_tail(workspace_tag) and utils.path_tail(workspace) .. Path.path.sep
       or self.fs:relative_from_home(workspace) .. Path.path.sep
     table.insert(items, { filtered, "Directory" })
+    table.insert(width_items, { width = self:calculate_filter_column_width(workspace, workspace_tag) })
   end
-  table.insert(items, { formatter(entry.name), self.loaded[entry.name] and "TelescopeBufferLoaded" or "" })
+  local formatted_name, path_style = formatter(entry.name)
-  return items
+  -- NOTE: this means it is formatted with the option: filename_first
+  if path_style and type(path_style) == "table" and #path_style > 0 then
+    local index = path_style[1][1]
+    local filename = formatted_name:sub(1, index[1])
+    local parent_path = formatted_name:sub(index[1] + 2, index[2])
+    local hl = path_style[1][2]
+
+    table.insert(items, { filename, self.loaded[entry.name] and "TelescopeBufferLoaded" or "" })
+    table.insert(items, { parent_path, hl })
+    table.insert(width_items, { width = #filename + 1 })
+    table.insert(width_items, { remaining = true })
+  else
+    table.insert(items, { formatted_name, self.loaded[entry.name] and "TelescopeBufferLoaded" or "" })
+    table.insert(width_items, { remaining = true })
+  end
+  return items, width_items
 end
 
 ---@private

lua/frecency/picker.lua

@@ -257,7 +257,7 @@ function Picker:set_prompt_options(bufnr)
   vim.keymap.set("i", "<S-Tab>", "pumvisible() ? '<C-p>' : ''", { buffer = bufnr, expr = true })
 end
 
----@alias FrecencyFilepathFormatter fun(workspace: string?): fun(filename: string): string): string
+---@alias FrecencyFilepathFormatter fun(workspace: string?): fun(filename: string): string, FrecencyTelescopePathStyle[]
 
 ---@private
 ---@param picker_opts table
@@ -272,6 +272,11 @@ function Picker:filepath_formatter(picker_opts)
     opts.cwd = workspace or self.fs.os_homedir
 
     return function(filename)
+      local path_display = config_values.path_display
+      if type(path_display) == "table" and path_display.filename_first then
+        opts.path_display = path_display
+      end
+
       return utils.transform_path(opts, filename)
     end
   end

lua/frecency/types.lua

@@ -139,9 +139,17 @@ function FrecencyPlenaryAsyncUtil.scheduler() end
 ---@class FrecencyTelescopeEntryDisplay
 ---@field create fun(opts: FrecencyTelescopeEntryDisplayOptions): FrecencyTelescopeEntryDisplayer
 
+---@class FrecencyTelescopePathStyleIndex
+---@field [1] integer start index of the path
+---@field [2] integer finish index of the path
+
+---@class FrecencyTelescopePathStyle
+---@field [1] FrecencyTelescopePathStyleIndex
+---@field [2] string highlight name
+
 ---@class FrecencyTelescopeUtils
 ---@field path_tail fun(path: string): string
----@field transform_path fun(opts: table, path: string): string
+---@field transform_path fun(opts: table, path: string): string, FrecencyTelescopePathStyle[]
 ---@field buf_is_loaded fun(filename: string): boolean
 
 ---@class FrecencyTelescopePicker