fix unist node handling (#23)

* fix unist node handling

remove `unist` package deps

* fix

Author: azu

package.json

@@ -28,7 +28,8 @@
   "scripts": {
     "build": "microbundle --external none",
     "prepublish": "npm run --if-present build",
-    "test": "mocha \"test/**/*.{js,ts}\"",
+    "typecheck": "tsc --noEmit",
+    "test": "npm run typecheck && mocha \"test/**/*.{js,ts}\"",
     "watch": "tsc -p . --watch",
     "format": "prettier --write \"**/*.{js,jsx,ts,tsx,css}\"",
     "prepare": "git config --local core.hooksPath .githooks"

src/StringSource.ts

@@ -1,10 +1,10 @@
-import type { TxtHtmlNode, TxtNode, TxtNodeLocation, TxtNodeRange } from "@textlint/ast-node-types";
+import type { TxtHtmlNode, TxtNode, TxtNodeLocation, TxtNodeRange, TxtParagraphNode } from "@textlint/ast-node-types";
 import { SourcePosition, StructuredSource } from "structured-source";
-import type { Node as UnistNode } from "unist";
 import unified from "unified";
 // @ts-expect-error no type definition
 import parse from "rehype-parse";
 import { emptyValue, handleReplacerCommand, maskValue, StringSourceReplacerCommand } from "./replacer";
+import { UnistNode } from "./UnistNode";
 
 const isTxtNode = (node: unknown): node is TxtNode => {
     return typeof node === "object" && node !== null && "range" in node;
@@ -228,7 +228,7 @@ export class StringSource {
         return this.originalSource.indexToPosition(originalIndex);
     }
 
-    isParagraphNode(node: TxtNode | StringSourceTxtParentNodeLikeNode): boolean {
+    isParagraphNode(node: TxtNode | StringSourceTxtParentNodeLikeNode): node is TxtParagraphNode {
         return node.type === "Paragraph";
     }
 
@@ -311,7 +311,7 @@ export class StringSource {
         // <p><strong><Str /></strong></p>
         // => container is <strong>
         const container = this.isParagraphNode(parent) ? newNode : parent;
-        const rawValue = container.raw as string | undefined;
+        const rawValue = "raw" in container ? container.raw : undefined;
         if (rawValue === undefined) {
             return;
         }

src/UnistNode.ts

@@ -0,0 +1,51 @@
+export type UnistPoint = {
+    /**
+     * Column in a source file (1-indexed integer).
+     */
+    column: number;
+
+    /**
+     * Line in a source file (1-indexed integer).
+     */
+    line: number;
+
+    /**
+     * Character in a source file (0-indexed integer).
+     */
+    offset?: number;
+};
+
+export type UnistPosition = {
+    /**
+     * Place of the first character of the parsed source region.
+     */
+    start: UnistPoint;
+
+    /**
+     * Place of the first character after the parsed source region.
+     */
+    end: UnistPoint;
+
+    /**
+     * Start column at each index (plus start line) in the source region,
+     * for elements that span multiple lines.
+     */
+    indent?: number[];
+};
+
+export type UnistNode = {
+    /**
+     * The variant of a node.
+     */
+    type: string;
+
+    /**
+     * Information from the ecosystem.
+     */
+    data?: unknown | undefined;
+    /**
+     * Location of a node in a source document.
+     * Must not be present if a node is generated.
+     */
+    position?: UnistPosition | undefined;
+};

src/replacer.ts

@@ -1,5 +1,5 @@
 import { TxtNode } from "@textlint/ast-node-types";
-import { Node as UnistNode } from "unist";
+import { UnistNode } from "./UnistNode";
 
 export type StringSourceReplacerMaskValueCommand = {
     type: "StringSourceReplacerMaskValueCommand";

test/StringSource-txt-test.js renamed to test/StringSource-txt-test.ts

@@ -2,11 +2,12 @@
 "use strict";
 import assert from "assert";
 import { StringSource } from "../src/StringSource";
+import type { TxtDocumentNode } from "@textlint/ast-node-types";
 
 describe("StringSource AST", function () {
     describe("#toString", function () {
         it("should concat string", function () {
-            const AST = {
+            const AST: TxtDocumentNode = {
                 type: "Document",
                 raw: "Str",
                 range: [0, 3],
@@ -56,8 +57,8 @@ describe("StringSource AST", function () {
                     }
                 ]
             };
-            let source = new StringSource(AST);
-            var text = source.toString();
+            const source = new StringSource(AST);
+            const text = source.toString();
             assert.equal(text + "!!", "Str!!");
         });
     });