feat: universal selector (#1877)

lua/avante/ui/selector/providers/fzf_lua.lua

@@ -0,0 +1,49 @@
+local Utils = require("avante.utils")
+local M = {}
+
+---@param selector avante.ui.Selector
+function M.show(selector)
+  local success, fzf_lua = pcall(require, "fzf-lua")
+  if not success then
+    Utils.error("fzf-lua is not installed. Please install fzf-lua to use it as a file selector.")
+    return
+  end
+
+  local formated_items = vim.iter(selector.items):map(function(item) return item.title end):totable()
+  local title_to_id = {}
+  for _, item in ipairs(selector.items) do
+    title_to_id[item.title] = item.id
+  end
+
+  local function close_action() selector.on_select(nil) end
+  fzf_lua.fzf_exec(
+    formated_items,
+    vim.tbl_deep_extend("force", {
+      prompt = selector.title,
+      preview = selector.get_preview_content and function(item)
+        local id = title_to_id[item[1]]
+        local content = selector.get_preview_content(id)
+        return content
+      end or nil,
+      fzf_opts = {},
+      git_icons = false,
+      actions = {
+        ["default"] = function(selected)
+          if not selected or #selected == 0 then return close_action() end
+          ---@type string[]
+          local selections = {}
+          for _, entry in ipairs(selected) do
+            local id = title_to_id[entry]
+            if id then table.insert(selections, id) end
+          end
+
+          selector.on_select(selections)
+        end,
+        ["esc"] = close_action,
+        ["ctrl-c"] = close_action,
+      },
+    }, selector.provider_opts)
+  )
+end
+
+return M