core: Change fzf_binds configuration style

This allows the users to configure fzf_binds in a way that is
similar to other key mappings defined in config.lua.

README.md

@@ -224,16 +224,16 @@ require'fzf-lua'.setup {
   fzf_layout          = 'reverse',      -- fzf '--layout=' options
   fzf_args            = '',             -- adv: fzf extra args, empty unless adv
   fzf_binds           = {               -- fzf '--bind=' options
-      'f2:toggle-preview',
-      'f3:toggle-preview-wrap',
-      'shift-down:preview-page-down',
-      'shift-up:preview-page-up',
-      'ctrl-u:unix-line-discard',
-      'ctrl-f:half-page-down',
-      'ctrl-b:half-page-up',
-      'ctrl-a:beginning-of-line',
-      'ctrl-e:end-of-line',
-      'alt-a:toggle-all',
+    ["f2"]            = "toggle-preview",
+    ["f3"]            = "toggle-preview-wrap",
+    ["shift-down"]    = "preview-page-down",
+    ["shift-up"]      = "preview-page-up",
+    ["ctrl-u"]        = "unix-line-discard",
+    ["ctrl-f"]        = "half-page-down",
+    ["ctrl-b"]        = "half-page-up",
+    ["ctrl-a"]        = "beginning-of-line",
+    ["ctrl-e"]        = "end-of-line",
+    ["alt-a"]         = "toggle-all",
   },
   --[[ fzf_colors = {                   -- fzf '--color=' options
       ["fg"] = { "fg", "CursorLine" },

lua/fzf-lua/config.lua

@@ -46,16 +46,16 @@ M.globals = {
     -- <C-u>       clear query
     -- <A-a>       toggle select-all
     -- <A-q>       send selected to quickfix
-    'f2:toggle-preview',
-    'f3:toggle-preview-wrap',
-    'shift-down:preview-page-down',
-    'shift-up:preview-page-up',
-    'ctrl-u:unix-line-discard',
-    'ctrl-f:half-page-down',
-    'ctrl-b:half-page-up',
-    'ctrl-a:beginning-of-line',
-    'ctrl-e:end-of-line',
-    'alt-a:toggle-all',
+    ["f2"]            = "toggle-preview",
+    ["f3"]            = "toggle-preview-wrap",
+    ["shift-down"]    = "preview-page-down",
+    ["shift-up"]      = "preview-page-up",
+    ["ctrl-u"]        = "unix-line-discard",
+    ["ctrl-f"]        = "half-page-down",
+    ["ctrl-b"]        = "half-page-up",
+    ["ctrl-a"]        = "beginning-of-line",
+    ["ctrl-e"]        = "end-of-line",
+    ["alt-a"]         = "toggle-all",
   },
   preview_border      = 'border',
   preview_wrap        = 'nowrap',

lua/fzf-lua/core.lua

@@ -101,11 +101,20 @@ M.create_fzf_colors = function(colors)
   return string.format("--color=%s", colors)
 end
 
+M.create_fzf_binds = function(binds)
+  local tbl = {}
+  for key, action in pairs(binds) do
+    table.insert(tbl, string.format("%s:%s", key, action))
+  end
+  return vim.fn.shellescape(table.concat(tbl, ","))
+end
+
 M.build_fzf_cli = function(opts, debug_print)
   opts.prompt = opts.prompt or config.globals.default_prompt
   opts.preview_offset = opts.preview_offset or ''
   opts.fzf_info = opts.fzf_info or config.globals.fzf_info
   opts.fzf_ansi = opts.fzf_ansi or config.globals.fzf_ansi
+
   if not opts.fzf_info then
     -- skim (rust version of fzf) doesn't
     -- support the '--info=' flag
@@ -120,8 +129,7 @@ M.build_fzf_cli = function(opts, debug_print)
     opts.fzf_args or config.globals.fzf_args or '',
     M.create_fzf_colors(opts.fzf_colors or config.globals.fzf_colors),
     opts.fzf_layout or config.globals.fzf_layout,
-    utils._if(opts.fzf_binds, opts.fzf_binds,
-      vim.fn.shellescape(table.concat(config.globals.fzf_binds, ','))),
+    M.create_fzf_binds(opts.fzf_binds or config.globals.fzf_binds),
     vim.fn.shellescape(opts.prompt),
     utils._if(opts.preview_window, opts.preview_window, M.preview_window(opts)),
     utils._if(#opts.preview_offset>0, ":"..opts.preview_offset, ''),