expose builtin previewer window options (closes #218)

README.md

@@ -261,6 +261,17 @@ require'fzf-lua'.setup {
                                         -- applies only when scrollbar = 'float'
       scrollchars    = {'█', '' },      -- scrollbar chars ({ <full>, <empty> }
                                         -- applies only when scrollbar = 'border'
+      winopts = {                       -- builtin previewer window options
+        number            = true,
+        relativenumber    = false,
+        cursorline        = true,
+        cursorlineopt     = 'both',
+        cursorcolumn      = false,
+        signcolumn        = 'no',
+        list              = false,
+        foldenable        = false,
+        foldmethod        = 'manual',
+      },
     },
     on_create = function()
       -- called once upon creation of the fzf main window

doc/fzf-lua.txt

@@ -295,6 +295,17 @@ Consult the list below for available settings:
                                             -- applies only when scrollbar = 'float'
           scrollchars    = {'█', '' },      -- scrollbar chars ({ <full>, <empty> }
                                             -- applies only when scrollbar = 'border'
+          winopts = {                       -- builtin previewer window options
+            number            = true,
+            relativenumber    = false,
+            cursorline        = true,
+            cursorlineopt     = 'both',
+            cursorcolumn      = false,
+            signcolumn        = 'no',
+            list              = false,
+            foldenable        = false,
+            foldmethod        = 'manual',
+          },
         },
         on_create = function()
           -- called once upon creation of the fzf main window

lua/fzf-lua/config.lua

@@ -58,6 +58,17 @@ M.globals = {
       -- default preview delay 100ms, same as native fzf preview
       -- https://github.com/junegunn/fzf/issues/2417#issuecomment-809886535
       delay               = 100,
+      winopts = {
+        number            = true,
+        relativenumber    = false,
+        cursorline        = true,
+        cursorlineopt     = 'both',
+        cursorcolumn      = false,
+        signcolumn        = 'no',
+        list              = false,
+        foldenable        = false,
+        foldmethod        = 'manual',
+      },
     },
     _borderchars          = {
       ["none"]            = {' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ' },

lua/fzf-lua/previewer/builtin.lua

@@ -32,6 +32,7 @@ function Previewer.base:new(o, opts, fzf_win)
   self.win = fzf_win
   self.delay = self.win.winopts.preview.delay or 100
   self.title = self.win.winopts.preview.title
+  self.winopts = self.win.winopts.preview.winopts
   self.syntax = o.syntax
   self.syntax_delay = o.syntax_delay
   self.syntax_limit_b = o.syntax_limit_b
@@ -47,18 +48,8 @@ function Previewer.base:close()
 end
 
 function Previewer.base:gen_winopts()
-  return {
-    wrap            = self.win.preview_wrap,
-    number          = true,
-    relativenumber  = false,
-    cursorline      = true,
-    cursorlineopt   = 'both',
-    cursorcolumn    = false,
-    signcolumn      = 'no',
-    list            = false,
-    foldenable      = false,
-    foldmethod      = 'manual',
-  }
+  local winopts = { wrap = self.win.preview_wrap }
+  return vim.tbl_extend("keep", winopts, self.winopts)
 end
 
 function Previewer.base:backup_winopts(win)
@@ -435,18 +426,11 @@ function Previewer.help_tags:new(o, opts, fzf_win)
 end
 
 function Previewer.help_tags:gen_winopts()
-  return {
-    wrap            = self.wrap,
-    number          = false,
-    relativenumber  = false,
-    cursorline      = true,
-    cursorlineopt   = 'both',
-    cursorcolumn    = false,
-    signcolumn      = 'no',
-    list            = false,
-    foldenable      = false,
-    foldmethod      = 'manual',
+  local winopts = {
+    wrap    = self.win.preview_wrap,
+    number  = false
   }
+  return vim.tbl_extend("keep", winopts, self.winopts)
 end
 
 function Previewer.help_tags:exec_cmd(str)