From 1d17cc4abc493d20b4aba36569e8805c2382ea7b Mon Sep 17 00:00:00 2001
From: qualious <denizsydgl@gmail.com>
Date: Sun, 12 Sep 2021 22:14:00 +0300
Subject: [PATCH] feat: smart path (#914)

path_display = { "smart" }

Co-authored-by: Deniz <deniz@admentum.se>
Co-authored-by: Simon Hauser <Simon-Hauser@outlook.de>
---
 doc/telescope.txt        |  3 +++
 lua/telescope/config.lua |  2 ++
 lua/telescope/utils.lua  | 44 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+)

diff --git a/doc/telescope.txt b/doc/telescope.txt
index da2415b..cdcfe56 100644
--- a/doc/telescope.txt
+++ b/doc/telescope.txt
@@ -201,6 +201,8 @@ telescope.setup({opts})                                    *telescope.setup()*
         - "hidden"    hide file names
         - "tail"      only display the file name, and not the path
         - "absolute"  display absolute paths
+        - "smart"     remove as much from the path as possible to only show
+                      the difference between the displayed paths
         - "shorten"   only display the first character of each directory in
                       the path
 
@@ -917,6 +919,7 @@ builtin.lsp_type_definitions({opts})          *builtin.lsp_type_definitions()*
         {jump_type} (string)  how to goto definition if there is only one,
                               values: "tab", "split", "vsplit", "never"
 
+
 builtin.lsp_implementations({opts})            *builtin.lsp_implementations()*
     Goto the implementation of the word under the cursor if there's only one,
     otherwise show all options in Telescope
diff --git a/lua/telescope/config.lua b/lua/telescope/config.lua
index d58b94e..c66278f 100644
--- a/lua/telescope/config.lua
+++ b/lua/telescope/config.lua
@@ -201,6 +201,8 @@ local telescope_defaults = {
     - "hidden"    hide file names
     - "tail"      only display the file name, and not the path
     - "absolute"  display absolute paths
+    - "smart"     remove as much from the path as possible to only show
+                  the difference between the displayed paths
     - "shorten"   only display the first character of each directory in
                   the path
 
diff --git a/lua/telescope/utils.lua b/lua/telescope/utils.lua
index b5be5ef..cddeea5 100644
--- a/lua/telescope/utils.lua
+++ b/lua/telescope/utils.lua
@@ -261,6 +261,48 @@ utils.path_shorten = function(filename, len)
   return Path:new(filename):shorten(len)
 end
 
+utils.path_smart = (function()
+  local paths = {}
+  return function(filepath)
+    local final = filepath
+    if #paths ~= 0 then
+      local dirs = vim.split(filepath, "/")
+      local max = 1
+      for _, p in pairs(paths) do
+        if #p > 0 and p ~= filepath then
+          local _dirs = vim.split(p, "/")
+          for i = 1, math.min(#dirs, #_dirs) do
+            if (dirs[i] ~= _dirs[i]) and i > max then
+              max = i
+              break
+            end
+          end
+        end
+      end
+      if #dirs ~= 0 then
+        if max == 1 and #dirs >= 2 then
+          max = #dirs - 2
+        end
+        final = ""
+        for k, v in pairs(dirs) do
+          if k >= max - 1 then
+            final = final .. (#final > 0 and "/" or "") .. v
+          end
+        end
+      end
+    end
+    if not paths[filepath] then
+      paths[filepath] = ""
+      table.insert(paths, filepath)
+    end
+    if final and final ~= filepath then
+      return "../" .. final
+    else
+      return filepath
+    end
+  end
+end)()
+
 utils.path_tail = (function()
   local os_sep = utils.get_separator()
   local match_string = "[^" .. os_sep .. "]*$"
@@ -300,6 +342,8 @@ utils.transform_path = function(opts, path)
   elseif type(path_display) == "table" then
     if vim.tbl_contains(path_display, "tail") or path_display.tail then
       transformed_path = utils.path_tail(transformed_path)
+    elseif vim.tbl_contains(path_display, "smart") or path_display.smart then
+      transformed_path = utils.path_smart(transformed_path)
     else
       if not vim.tbl_contains(path_display, "absolute") or path_display.absolute == false then
         local cwd