👍 Add Fall command completion

Author: lambdalisue

autoload/fall/command/Fall.vim

@@ -11,7 +11,7 @@ function! fall#command#Fall#call(args) abort
   try
     set laststatus=0
     call fall#internal#mapping#store()
-    call denops#request('fall', 'picker:start:command', [a:args])
+    call denops#request('fall', 'picker:command', [a:args])
   finally
     augroup fall_command_Fall
       autocmd!
@@ -23,10 +23,10 @@ function! fall#command#Fall#call(args) abort
 endfunction
 
 function! fall#command#Fall#complete(arglead, cmdline, cursorpos) abort
-  if denops#plugin#wait('fall') == 0
+  if denops#plugin#wait('fall') isnot# 0
     return []
   endif
-  return []
+  return denops#request('fall', 'picker:command:complete', [a:arglead, a:cmdline, a:cursorpos])
 endfunction
 
 function! s:hide() abort

denops/fall/config.ts

@@ -9,7 +9,10 @@ import {
 
 export { getGlobalConfig } from "./config/global_config.ts";
 export { getActionPickerParams } from "./config/action_picker.ts";
-export { getItemPickerParams } from "./config/item_picker.ts";
+export {
+  getItemPickerParams,
+  listItemPickerNames,
+} from "./config/item_picker.ts";
 
 export async function loadUserConfig(
   denops: Denops,

denops/fall/config/item_picker.ts

@@ -19,6 +19,10 @@ const itemPickerParamsMap = new Map<
   ItemPickerParams<unknown, string>
 >();
 
+export function listItemPickerNames(): readonly string[] {
+  return Array.from(itemPickerParamsMap.keys());
+}
+
 export function getItemPickerParams(
   name: string,
 ): Readonly<ItemPickerParams<unknown, string> & GlobalConfig> | undefined {

denops/fall/main/picker.ts

@@ -16,6 +16,7 @@ import {
   getActionPickerParams,
   getGlobalConfig,
   getItemPickerParams,
+  listItemPickerNames,
   loadUserConfig,
 } from "../config.ts";
 import { Picker } from "../picker.ts";
@@ -26,7 +27,7 @@ let zindex = 50;
 export const main: Entrypoint = (denops) => {
   denops.dispatcher = {
     ...denops.dispatcher,
-    "picker:start:command": async (args) => {
+    "picker:command": async (args) => {
       await init(denops);
       // Split the command arguments
       const [name, ...sourceArgs] = ensure(args, isArgs);
@@ -49,6 +50,13 @@ export const main: Entrypoint = (denops) => {
         { signal: denops.interrupted },
       );
     },
+    "picker:command:complete": async (arglead, cmdline, cursorpos) => {
+      await init(denops);
+      assert(arglead, is.String);
+      assert(cmdline, is.String);
+      assert(cursorpos, is.Number);
+      return listItemPickerNames().filter((name) => name.startsWith(arglead));
+    },
     "picker:start": async (args, screen, params, options) => {
       await init(denops);
       assert(args, isArgs);

plugin/fall.vim

@@ -3,7 +3,9 @@ if exists('g:loaded_fall')
 endif
 let g:loaded_fall = 1
 
-command! -nargs=+ Fall call fall#command#Fall#call([<f-args>])
+command! -nargs=+ -complete=customlist,fall#command#Fall#complete 
+      \ Fall call fall#command#Fall#call([<f-args>])
+
 command! -nargs=0 FallConfig call fall#command#FallConfig#call()
 
 augroup fall_plugin