terrastruct · alixander · Jan 16, 2025 · Jan 14, 2025 · Jan 15, 2025 · Jan 16, 2025
diff --git a/ci/peek-wasm-size.sh b/ci/peek-wasm-size.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+OUTPUT_FILE="main.wasm"
+SOURCE_PACKAGE="./d2js"
+
+echo "Building WASM file..."
+GOOS=js GOARCH=wasm go build -ldflags='-s -w' -trimpath -o "$OUTPUT_FILE" "$SOURCE_PACKAGE"
+
+if [ $? -eq 0 ]; then
+    echo "Build successful."
+
+    if [ -f "$OUTPUT_FILE" ]; then
+        FILE_SIZE_BYTES=$(stat -f%z "$OUTPUT_FILE")
+        FILE_SIZE_MB=$(echo "scale=2; $FILE_SIZE_BYTES / 1024 / 1024" | bc)
+
+        echo "File size of $OUTPUT_FILE: $FILE_SIZE_MB MB"
+    else
+        echo "File $OUTPUT_FILE not found!"
+        exit 1
+    fi
+
+    echo "Deleting $OUTPUT_FILE..."
+    rm "$OUTPUT_FILE"
+    echo "File deleted."
+else
+    echo "Build failed."
+    exit 1
+fi
diff --git a/d2js/d2wasm/functions.go b/d2js/d2wasm/functions.go
@@ -107,6 +107,52 @@ func GetRefRanges(args []js.Value) (interface{}, error) {
 	}, nil
 }
 
+func GetELKGraph(args []js.Value) (interface{}, error) {
+	if len(args) < 1 {
+		return nil, &WASMError{Message: "missing JSON argument", Code: 400}
+	}
+	var input CompileRequest
+	if err := json.Unmarshal([]byte(args[0].String()), &input); err != nil {
+		return nil, &WASMError{Message: "invalid JSON input", Code: 400}
+	}
+
+	if input.FS == nil {
+		return nil, &WASMError{Message: "missing 'fs' field in input JSON", Code: 400}
+	}
+
+	if _, ok := input.FS["index"]; !ok {
+		return nil, &WASMError{Message: "missing 'index' file in input fs", Code: 400}
+	}
+
+	fs, err := memfs.New(input.FS)
+	if err != nil {
+		return nil, &WASMError{Message: fmt.Sprintf("invalid fs input: %s", err.Error()), Code: 400}
+	}
+
+	g, _, err := d2compiler.Compile("", strings.NewReader(input.FS["index"]), &d2compiler.CompileOptions{
+		UTF16Pos: true,
+		FS:       fs,
+	})
+	if err != nil {
+		return nil, &WASMError{Message: err.Error(), Code: 400}
+	}
+
+	ruler, err := textmeasure.NewRuler()
+	if err != nil {
+		return nil, &WASMError{Message: fmt.Sprintf("text ruler cannot be initialized: %s", err.Error()), Code: 500}
+	}
+	err = g.SetDimensions(nil, ruler, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	elk, err := d2elklayout.ConvertGraph(context.Background(), g, nil)
+	if err != nil {
+		return nil, &WASMError{Message: err.Error(), Code: 400}
+	}
+	return elk, nil
+}
+
 func Compile(args []js.Value) (interface{}, error) {
 	if len(args) < 1 {
 		return nil, &WASMError{Message: "missing JSON argument", Code: 400}

diff --git a/d2js/js.go b/d2js/js.go
@@ -15,6 +15,7 @@ func main() {
 	api.Register("getParentID", d2wasm.GetParentID)
 	api.Register("getObjOrder", d2wasm.GetObjOrder)
 	api.Register("getRefRanges", d2wasm.GetRefRanges)
+	api.Register("getELKGraph", d2wasm.GetELKGraph)
 	api.Register("compile", d2wasm.Compile)
 	api.Register("render", d2wasm.Render)
 	api.Register("getBoardAtPosition", d2wasm.GetBoardAtPosition)

diff --git a/d2js/js/build.js b/d2js/js/build.js
@@ -93,6 +93,7 @@ async function buildAndCopy(buildType) {
       resolve(ROOT_DIR, "wasm/wasm_exec.js"),
       join(config.outdir, "wasm_exec.js")
     );
+    await copyFile(resolve(ROOT_DIR, "src/elk.js"), join(config.outdir, "elk.js"));
   }
 }
 

diff --git a/d2js/js/examples/customizable.html b/d2js/js/examples/customizable.html
@@ -24,7 +24,16 @@
         border-radius: 4px;
         font-family: monospace;
       }
-      .layout-toggle {
+      .options-group {
+        display: flex;
+        flex-direction: column;
+        gap: 12px;
+        padding: 12px;
+        border: 1px solid #eee;
+        border-radius: 4px;
+      }
+      .layout-toggle,
+      .sketch-toggle {
         display: flex;
         gap: 16px;
         align-items: center;
@@ -33,7 +42,8 @@
         display: flex;
         gap: 12px;
       }
-      .radio-label {
+      .radio-label,
+      .checkbox-label {
         display: flex;
         gap: 4px;
         align-items: center;
@@ -66,16 +76,24 @@
   <body>
     <div class="controls">
       <textarea id="input">x -> y</textarea>
-      <div class="layout-toggle">
-        <span>Layout:</span>
-        <div class="radio-group">
-          <label class="radio-label">
-            <input type="radio" name="layout" value="dagre" checked />
-            Dagre
-          </label>
-          <label class="radio-label">
-            <input type="radio" name="layout" value="elk" />
-            ELK
+      <div class="options-group">
+        <div class="layout-toggle">
+          <span>Layout:</span>
+          <div class="radio-group">
+            <label class="radio-label">
+              <input type="radio" name="layout" value="dagre" checked />
+              Dagre
+            </label>
+            <label class="radio-label">
+              <input type="radio" name="layout" value="elk" />
+              ELK
+            </label>
+          </div>
+        </div>
+        <div class="sketch-toggle">
+          <label class="checkbox-label">
+            <input type="checkbox" id="sketch" />
+            Sketch mode
           </label>
         </div>
       </div>
@@ -88,9 +106,10 @@
       window.compile = async () => {
         const input = document.getElementById("input").value;
         const layout = document.querySelector('input[name="layout"]:checked').value;
+        const sketch = document.getElementById("sketch").checked;
         try {
-          const result = await d2.compile(input, { layout });
-          const svg = await d2.render(result.diagram);
+          const result = await d2.compile(input, { layout, sketch });
+          const svg = await d2.render(result.diagram, { sketch });
           document.getElementById("output").innerHTML = svg;
         } catch (err) {
           console.error(err);

diff --git a/d2js/js/package.json b/d2js/js/package.json
@@ -2,7 +2,7 @@
   "name": "@terrastruct/d2",
   "author": "Terrastruct, Inc.",
   "description": "D2.js is a wrapper around the WASM build of D2, the modern text-to-diagram language.",
-  "version": "0.1.20",
+  "version": "0.1.21",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/terrastruct/d2.git",
-Original file line number
+Diff line change
@@ Expand Up / @@ -93,6 +93,7 @@ async function buildAndCopy(buildType) { @@
           resolve(ROOT_DIR, "wasm/wasm_exec.js"),
           join(config.outdir, "wasm_exec.js")
         );
+        await copyFile(resolve(ROOT_DIR, "src/elk.js"), join(config.outdir, "elk.js"));
       }
     }
@@ Expand Down @@