👍 Add numerical sorter

Author: lambdalisue

deno.jsonc

@@ -51,6 +51,7 @@
     "./builtin/sorter": "./denops/@fall/builtin/sorter/mod.ts",
     "./builtin/sorter/lexical": "./denops/@fall/builtin/sorter/lexical.ts",
     "./builtin/sorter/noop": "./denops/@fall/builtin/sorter/noop.ts",
+    "./builtin/sorter/numerical": "./denops/@fall/builtin/sorter/numerical.ts",
     "./builtin/source": "./denops/@fall/builtin/source/mod.ts",
     "./builtin/source/buffer": "./denops/@fall/builtin/source/buffer.ts",
     "./builtin/source/file": "./denops/@fall/builtin/source/file.ts",

denops/@fall/builtin/sorter/lexical.ts

@@ -1,20 +1,19 @@
+import type { IdItem } from "../../item.ts";
 import { defineSorter, type Sorter } from "../../sorter.ts";
 
-type Options = {
+type Options<T> = {
+  attrGetter?: (item: IdItem<T>) => string;
   reverse?: boolean;
 };
 
-export function lexical<T>(options: Readonly<Options> = {}): Sorter<T> {
-  const reverse = options.reverse ?? false;
+export function lexical<T>(options: Readonly<Options<T>> = {}): Sorter<T> {
+  const attrGetter = options.attrGetter ?? ((item: IdItem<T>) => item.value);
+  const alpha = options.reverse ? -1 : 1;
   return defineSorter<T>((_denops, { items }, _options) => {
-    if (reverse) {
-      items.sort((a, b) =>
-        b.value < a.value ? -1 : (b.value > a.value ? 1 : 0)
-      );
-    } else {
-      items.sort((a, b) =>
-        a.value < b.value ? -1 : (a.value > b.value ? 1 : 0)
-      );
-    }
+    items.sort((a, b) => {
+      const va = attrGetter(a);
+      const vb = attrGetter(b);
+      return (va < vb ? -1 : (va > vb ? 1 : 0)) * alpha;
+    });
   });
 }

denops/@fall/builtin/sorter/mod.ts

@@ -1,3 +1,4 @@
 // This file is generated by gen-mod.ts
 export * from "./lexical.ts";
 export * from "./noop.ts";
+export * from "./numerical.ts";

denops/@fall/builtin/sorter/numerical.ts

@@ -0,0 +1,22 @@
+import type { IdItem } from "../../item.ts";
+import { defineSorter, type Sorter } from "../../sorter.ts";
+
+type Options<T> = {
+  attrGetter?: (item: IdItem<T>) => unknown;
+  reverse?: boolean;
+};
+
+export function numerical<T>(options: Readonly<Options<T>> = {}): Sorter<T> {
+  const attrGetter = options.attrGetter ?? ((item: IdItem<T>) => item.value);
+  const alpha = options.reverse ? -1 : 1;
+  return defineSorter<T>((_denops, { items }, _options) => {
+    items.sort((a, b) => {
+      const va = attrGetter(a);
+      const vb = attrGetter(b);
+      const na = typeof va === "number" ? va : Number(va);
+      const nb = typeof vb === "number" ? vb : Number(vb);
+      if (isNaN(na) || isNaN(nb)) return 0;
+      return Math.sign(na - nb) * alpha;
+    });
+  });
+}