feat(profiles): added hide (improved resume, #1686)

The profile changes the default binds to hide the fzf-lua window
instead of aborting it, therefore keeping cursor position, selection,
etc.

Note that this also continues long running operations in the background
so be mindful of sending fzf to background on a large mono repo, can
still be aborted with `ctrl-c` or `alt-esc`.

Enable with:
```lua
-- Set as base profile
:lua require("fzf-lua").setup({"hide"})
-- More than one profile
:lua require("fzf-lua").setup({"border-fused","hide"})
-- Or with `profiles`:
:FzfLua profiles load=hide
-- More than one profile
:FzfLua profiles load={"border-fused","hide"}
```

README.md

@@ -145,16 +145,18 @@ Alternatively, resuming work on a specific picker:
 > By default pressing esc or ctrl-c terminates the fzf process,
 > as such resume is not perfect and is limited to resuming the
 > picker/query and sometimes additional parameters such as regex
-> in grep, etc, for a more "complete" resume press alt-esc to
-> hide the fzf process instead, this will keep the fzf process
-> running in the background and thus will restore the process
-> entirely including cursor position and selection.
+> in grep, etc, for a more complete resume use the "hide" profile,
+> this will keep the fzf process running in the background allowing
+> `:FzfLua resume` to restore the picker state entirely, including
+> cursor position and selection.
 > To configure hiding by default:
 > ```lua
-> require("fzf-lua").setup({ keymap = { builtin = { true, ["<Esc>"] = "hide" } } })
+> require("fzf-lua").setup({
+>   "hide",
+>   -- your other settings here 
+> })
 > ```
 
-
 **LIST OF AVAILABLE COMMANDS BELOW** 👇
 
 ## Commands
@@ -1077,10 +1079,6 @@ previewers = {
     winopts           = { height = 0.55, width = 0.30, },
     -- uncomment to ignore colorschemes names (lua patterns)
     -- ignore_patterns   = { "^delek$", "^blue$" },
-    -- uncomment to execute a callback on preview|close
-    -- e.g. a call to reset statusline highlights
-    -- cb_preview        = function() ... end,
-    -- cb_exit           = function() ... end,
   },
   awesome_colorschemes = {
     prompt            = 'Colorschemes❯ ',
@@ -1099,9 +1097,6 @@ previewers = {
       ["ctrl-r"]  = { fn = actions.cs_update, reload = true },
       ["ctrl-x"]  = { fn = actions.cs_delete, reload = true },
     },
-    -- uncomment to execute a callback on preview|close
-    -- cb_preview        = function() ... end,
-    -- cb_exit           = function() ... end,
   },
   keymaps = {
     prompt            = "Keymaps> ",
@@ -1359,6 +1354,7 @@ require('fzf-lua').setup({'fzf-vim'})
 | `borderless`      | borderless and minimalistic seamless look &amp; feel                                                |
 | `borderless-full` | borderless with description in window title (instead of prompt)                                     |
 | `border-fused`    | single border around both fzf and the previewer                                                     |
+| `hide`            | send fzf process to background instead of termination                                               |
 
 </details>
 

lua/fzf-lua/actions.lua

@@ -696,7 +696,8 @@ M.git_yank_commit = function(selected, opts)
   -- copy to the yank register regardless
   vim.fn.setreg(reg, commit_hash)
   vim.fn.setreg([[0]], commit_hash)
-  utils.info(string.format("commit hash %s copied to register %s, use 'p' to paste.", commit_hash, reg))
+  utils.info(string.format("commit hash %s copied to register %s, use 'p' to paste.",
+    commit_hash, reg))
 end
 
 M.git_checkout = function(selected, opts)

lua/fzf-lua/config.lua

@@ -841,6 +841,10 @@ function M.normalize_opts(opts, globals, __resume_key)
     end
   end
 
+  if type(opts.enrich) == "function" then
+    opts = opts.enrich(opts)
+  end
+
   -- mark as normalized
   opts._normalized = true
 

lua/fzf-lua/core.lua

@@ -610,7 +610,7 @@ M.create_fzf_binds = function(opts)
     -- Separate "transform|execute|execute-silent" binds to their own `--bind` argument, this
     -- way we can use `transform:...` and not be forced to use brackets, i.e. `transform(...)`
     -- this enables us to use brackets in the inner actions, e.g. "zero:transform:rebind(...)"
-    if action:match("transform") or action:match("execute") then
+    if action:match("transform") or action:match("execute") or action:match("reload") then
       table.insert(separate, bind)
     else
       table.insert(combine, bind)
@@ -1103,14 +1103,20 @@ M.convert_reload_actions = function(reload_cmd, opts)
       local shell_action = shell.raw_action(function(items, _, _)
         v.fn(items, opts)
       end, v.field_index == false and "" or v.field_index or "{+}", opts.debug)
+      if type(v.prefix) == "string" and not v.prefix:match("%+$") then
+        v.prefix = v.prefix .. "+"
+      end
+      if type(v.postfix) == "string" and not v.postfix:match("^%+") then
+        v.postfix = "+" .. v.postfix
+      end
       opts.keymap.fzf[k] = {
         string.format("%s%sexecute-silent(%s)+reload(%s)%s",
           type(v.prefix) == "string" and v.prefix or "",
           unbind and (unbind .. "+") or "",
           shell_action,
           reload_cmd,
           type(v.postfix) == "string" and v.postfix or ""),
-        desc = config.get_action_helpstr(v.fn)
+        desc = v.desc or config.get_action_helpstr(v.fn)
       }
       opts.actions[k] = nil
     end
@@ -1125,25 +1131,54 @@ end
 ---@param opts table
 ---@return table
 M.convert_exec_silent_actions = function(opts)
-  -- Does not work with fzf version < 0.36, fzf fails with
-  -- "error 2: bind action not specified:"
-  if not utils.has(opts, "fzf", { 0, 36 })
-      or utils.has(opts, "sk") then
+  -- `execute-silent` actions are bugged with skim (can't use quotes)
+  if utils.has(opts, "sk") then
     return opts
   end
   for k, v in pairs(opts.actions) do
     if type(v) == "table" and v.exec_silent then
       assert(type(v.fn) == "function")
+      -- Use both {q} and {+} as field indexes so we can update last query when
+      -- executing the action, without this we lose the last query on "hide" as
+      -- the process never terminates and `--print-query` isn't being printed
+      local field_index = v.field_index == false and "" or v.field_index or "{q} {+}"
       -- replace the action with shell cmd proxy to the original action
       local shell_action = shell.raw_action(function(items, _, _)
+        if field_index:match("^{q}") then
+          local query = table.remove(items, 1)
+          config.resume_set("query", query, opts)
+        end
         v.fn(items, opts)
-      end, v.field_index == false and "" or v.field_index or "{+}", opts.debug)
+      end, field_index, opts.debug)
+      if type(v.prefix) == "string" and not v.prefix:match("%+$") then
+        v.prefix = v.prefix .. "+"
+      end
+      if type(v.postfix) == "string" and not v.postfix:match("^%+") then
+        v.postfix = "+" .. v.postfix
+      end
+      -- `execute-silent(...)` with fzf version < 0.36, errors with:
+      -- 'error 2: bind action not specified' (due to inner brackets)
+      -- changing to `execute-silent:...` removes the need to care for
+      -- brackets within the command with the limitation of not using
+      -- potfix (must be the last part of the arg), from `man fzf`:
+      --
+      --   action-name:...
+      --      The last one is the special form that frees you from parse
+      --      errors as it does not expect the closing character. The catch is
+      --      that it should be the last one in the comma-separated list of
+      --      key-action pairs.
+      --
+      local has_fzf036 = utils.has(opts, "fzf", { 0, 36 })
       opts.keymap.fzf[k] = {
-        string.format("%sexecute-silent(%s)%s",
+        string.format("%sexecute-silent%s%s",
           type(v.prefix) == "string" and v.prefix or "",
-          shell_action,
-          type(v.postfix) == "string" and v.postfix or ""),
-        desc = config.get_action_helpstr(v.fn)
+          -- prefer "execute-silent:..." unless we have postfix
+          has_fzf036 and type(v.postfix) == "string"
+          and string.format("(%s)", shell_action)
+          or string.format(":%s", shell_action),
+          -- can't use postfix since we use "execute-silent:..."
+          has_fzf036 and type(v.postfix) == "string" and v.postfix or ""),
+        desc = v.desc or config.get_action_helpstr(v.fn)
       }
       opts.actions[k] = nil
     end

lua/fzf-lua/defaults.lua

@@ -445,7 +445,7 @@ M.defaults.git                  = {
     prompt     = "Branches> ",
     cmd        = "git branch --all --color",
     preview    = "git log --graph --pretty=oneline --abbrev-commit --color {1}",
-    remotes     = "local",
+    remotes    = "local",
     actions    = {
       ["enter"]  = actions.git_switch,
       ["ctrl-x"] = { fn = actions.git_branch_del, reload = true },

lua/fzf-lua/init.lua

@@ -143,7 +143,7 @@ end
 -- case the user decides not to call `setup()`
 M.setup_highlights()
 
-local function load_profiles(profiles)
+function M.load_profiles(profiles, silent, opts)
   local ret = {}
   profiles = type(profiles) == "table" and profiles
       or type(profiles) == "string" and { profiles }
@@ -152,15 +152,15 @@ local function load_profiles(profiles)
     -- backward compat, renamed "borderless_full" > "borderless-full"
     if profile == "borderless_full" then profile = "borderless-full" end
     local fname = path.join({ vim.g.fzf_lua_directory, "profiles", profile .. ".lua" })
-    local profile_opts = utils.load_profile_fname(fname, nil, 1)
+    local profile_opts = utils.load_profile_fname(fname, nil, silent)
     if type(profile_opts) == "table" then
       if profile_opts[1] then
         -- profile requires loading base profile(s)
         profile_opts = vim.tbl_deep_extend("keep",
-          profile_opts, load_profiles(profile_opts[1]))
+          profile_opts, M.load_profiles(profile_opts[1], silent, opts))
       end
       if type(profile_opts.fn_load) == "function" then
-        profile_opts.fn_load()
+        profile_opts.fn_load(opts)
         profile_opts.fn_load = nil
       end
       ret = vim.tbl_deep_extend("force", ret, profile_opts)
@@ -175,7 +175,7 @@ function M.setup(opts, do_not_reset_defaults)
   opts[1] = opts[1] == nil and utils.__HAS_NVIM_09 and "default-title" or opts[1]
   if opts[1] then
     -- Did the user supply profile(s) to load?
-    opts = vim.tbl_deep_extend("keep", opts, load_profiles(opts[1]))
+    opts = vim.tbl_deep_extend("keep", opts, M.load_profiles(opts[1], 1, opts))
   end
   if do_not_reset_defaults then
     -- no defaults reset requested, merge with previous setup options
@@ -381,6 +381,7 @@ M._exported_modules = {
 M._excluded_meta = {
   "setup",
   "redraw",
+  "load_profiles",
   "fzf",
   "fzf_raw",
   "fzf_wrap",

lua/fzf-lua/profiles/README.md

@@ -29,6 +29,7 @@ telescope defaults with `bat` previewer:
 | `borderless`       | borderless and minimalistic seamless look & feel |
 | `borderless-full`  | borderless with description in window title (instead of prompt) |
 | `border-fused`     | single border around both fzf and the previewer |
+| `hide`            | send fzf process to background instead of termination |
 
 
 **Custom user settings which make sense and aren't mere duplications with minimal modifications

lua/fzf-lua/profiles/hide.lua

@@ -0,0 +1,53 @@
+local uv = vim.uv or vim.loop
+local fzf = require("fzf-lua")
+return {
+  desc     = "hide interface instead of abort",
+  defaults = {
+    enrich = function(opts)
+      if opts._is_fzf_tmux then
+        fzf.utils.warn("'hide' profile cannot work with tmux, ignoring.")
+        return opts
+      end
+      -- `execute-silent` actions are bugged with skim
+      if fzf.utils.has(opts, "sk") then
+        opts.actions["esc"] = false
+        opts.keymap.builtin["<esc>"] = "hide"
+        return opts
+      end
+      -- While we can use `keymap.builtin.<esc>` (to hide) this is better
+      -- as it captures the query when execute-silent action is called as
+      -- we add "{q}" as the first field index similar to `--print-query`
+      local histfile = opts.fzf_opts and opts.fzf_opts["--history"]
+      opts.actions["esc"] = { fn = fzf.actions.dummy_abort, desc = "hide" }
+      opts.actions = vim.tbl_map(function(act)
+        act = type(act) == "function" and { fn = act } or act
+        act = type(act) == "table" and type(act[1]) == "function"
+            and { fn = act[1], noclose = true } or act
+        assert(type(act) == "table" and type(act.fn) == "function" or not act)
+        if type(act) == "table" and
+            not act.exec_silent and not act.reload and not act.noclose
+        then
+          local fn = act.fn
+          act.exec_silent = true
+          act.desc = act.desc or fzf.config.get_action_helpstr(fn)
+          act.fn = function(s, o)
+            fzf.hide()
+            fn(s, o)
+            -- As the process never terminates fzf history is never written
+            -- manually append to the fzf history file if needed
+            if histfile and type(o.last_query) == "string" and #o.last_query > 0 then
+              local fd = uv.fs_open(histfile, "a", -1)
+              if fd then
+                uv.fs_write(fd, o.last_query .. "\n", nil, function(_)
+                  uv.fs_close(fd)
+                end)
+              end
+            end
+          end
+        end
+        return act
+      end, opts.actions)
+      return opts
+    end,
+  },
+}

lua/fzf-lua/providers/colorschemes.lua

@@ -61,32 +61,28 @@ M.colorschemes = function(opts)
     opts.fzf_opts["--preview-window"] = "nohidden:right:0"
     opts.preview = shell.raw_action(function(sel)
       if opts.live_preview and sel then
+        opts._live = sel[1]
         vim.cmd("colorscheme " .. sel[1])
-        if type(opts.cb_preview) == "function" then
-          opts.cb_preview(sel, opts)
-        end
       end
     end, nil, opts.debug)
   end
 
-  opts.fn_selected = function(selected, o)
+  opts.winopts = opts.winopts or {}
+  opts.winopts.on_close = function()
     -- reset color scheme if live_preview is enabled
-    -- and nothing or non-default action was selected
-    if opts.live_preview and (not selected or #selected[1] > 0) then
+    if opts._live and opts._live ~= current_colorscheme then
       vim.cmd("colorscheme " .. current_colorscheme)
       vim.o.background = current_background
     end
+  end
 
+  opts.fn_selected = function(selected, o)
     if selected then
       actions.act(opts.actions, selected, o)
     end
 
     -- setup fzf-lua's own highlight groups
     utils.setup_highlights()
-
-    if type(opts.cb_exit) == "function" then
-      opts.cb_exit(selected, opts)
-    end
   end
 
   core.fzf_exec(colors, opts)
@@ -486,12 +482,11 @@ M.awesome_colorschemes = function(opts)
           -- wrap in pcall as some colorschemes have bg triggers that can fail
           pcall(function() vim.o.background = opts._cur_background end)
           M.apply_awesome_theme(dbkey, idx, opts)
-          if type(opts.cb_preview) == "function" then
-            opts.cb_preview(sel, opts)
-          end
+          opts._live = true
         else
           vim.cmd("colorscheme " .. opts._cur_colorscheme)
           vim.o.background = opts._cur_background
+          opts._live = nil
         end
       end
     end, "{}", opts.debug)
@@ -509,6 +504,15 @@ M.awesome_colorschemes = function(opts)
     end
   end
 
+  opts.winopts = opts.winopts or {}
+  opts.winopts.on_close = function()
+    -- reset color scheme if live_preview is enabled
+    if opts._live then
+      vim.cmd("colorscheme " .. opts._cur_colorscheme)
+      vim.o.background = opts._cur_background
+    end
+  end
+
   opts.fn_selected = function(sel, o)
     -- do not remove our cache path from packpath
     -- or packadd in `apply_awesome_theme` fails
@@ -530,10 +534,6 @@ M.awesome_colorschemes = function(opts)
 
     -- setup fzf-lua's own highlight groups
     utils.setup_highlights()
-
-    if type(o.cb_exit) == "function" then
-      o.cb_exit(sel, o)
-    end
   end
 
   opts = core.set_header(opts, opts.headers or { "actions" })

lua/fzf-lua/providers/module.lua

@@ -57,6 +57,11 @@ M.profiles = function(opts)
   opts = config.normalize_opts(opts, "profiles")
   if not opts then return end
 
+  if opts.load then
+    utils.load_profiles(opts.load)
+    return
+  end
+
   local dirs = {
     path.join({ vim.g.fzf_lua_directory, "profiles" })
   }

lua/fzf-lua/shell.lua

@@ -12,7 +12,7 @@ local M = {}
 -- provider are 2 (`live_grep` with `multiprocess=false`)
 -- and 4 (`git_status` with preview and 3 reload binds)
 -- we can always increase if we need more
-local _MAX_LEN = vim.g.fzf_lua_shell_maxlen or 10
+local _MAX_LEN = 50
 local _index = 0
 local _registry = {}
 local _protected = {}