package type: module

.gitignore

@@ -1,2 +1 @@
 /node_modules/
-/index.js

index.js

@@ -0,0 +1,50 @@
+// https://knowledge.autodesk.com/ja/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2019/JPN/AutoCAD-Core/files/GUID-968CBC1D-BA99-4519-ABDD-88419EB2BF92-htm.html
+// https://knowledge.autodesk.com/ja/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2019/JPN/AutoCAD-Core/files/GUID-518E1A9D-398C-4A8A-AC32-2D85590CDBE1-htm.html
+const dxfTextControlCodeSymbolMap = {
+    d: '°',
+    c: '⌀',
+    p: '±',
+};
+export const decodeDxfTextCharacterCodes = (text, mbcsEncoding) => {
+    text = decodeDxfTextUnicodeCodePoints(text);
+    return mbcsEncoding ? decodeDxfTextMbcsCharacterCodes(text, mbcsEncoding) : text;
+};
+export const decodeDxfTextUnicodeCodePoints = (text) => text.replace(/\\[uU]\+([0-9a-fA-F]{4})/g, (_, codePoint) => String.fromCodePoint(parseInt(codePoint, 16)));
+export const decodeDxfTextMbcsCharacterCodes = (text, encoding) => {
+    let decoder = encoding instanceof TextDecoder ? encoding : undefined;
+    return text.replace(/\\[mM]\+1([0-9a-fA-F]{2})([0-9a-fA-F]{2})/g, (_, a, b) => (decoder = decoder || new TextDecoder(encoding)).decode(new Uint8Array([parseInt(a, 16), parseInt(b, 16)])));
+};
+export const parseDxfTextContent = (text, options) => {
+    text = decodeDxfTextCharacterCodes(text, options?.encoding);
+    let previousIndex = 0;
+    let currentContent = { text: '' };
+    const contents = [currentContent];
+    for (const match of text.matchAll(/%%(\d\d\d|.)/g)) {
+        currentContent.text += text.slice(previousIndex, match.index);
+        const c = match[1];
+        const code = c.toLowerCase();
+        const symbol = dxfTextControlCodeSymbolMap[code];
+        if (symbol) {
+            currentContent.text += symbol;
+        }
+        else if (code.length === 3) {
+            currentContent.text += String.fromCodePoint(+code);
+        }
+        else if (code === 'k' || code === 'o' || code === 'u') {
+            currentContent = { ...currentContent, text: '' };
+            if (currentContent[code]) {
+                delete currentContent[code];
+            }
+            else {
+                currentContent[code] = 1;
+            }
+            contents.push(currentContent);
+        }
+        else {
+            currentContent.text += code;
+        }
+        previousIndex = match.index + match[0].length;
+    }
+    currentContent.text += text.slice(previousIndex);
+    return contents.filter(content => content.text);
+};

package.json

@@ -7,13 +7,13 @@
   "keywords": [
     "dxf"
   ],
-  "main": "index.mjs",
+  "type": "module",
+  "main": "index.js",
   "types": "index.d.ts",
   "scripts": {
-    "build": "tsc -p . && terser -c -m --toplevel -b beautify=false,semicolons=false --warn -o index.mjs index.js"
+    "build": "tsc -p ."
   },
   "devDependencies": {
-    "terser": "^5.14.2",
-    "typescript": "^4.7.4"
+    "typescript": "^5.0.4"
   }
 }

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
-    "target": "es2020",
-    "module": "es2020",
+    "target": "es2022",
+    "module": "es2022",
     "moduleResolution": "node",
     "declaration": true,
     "strict": true,