JS - Add the basic architecture to be able to execute embedded js

gulpfile.js

@@ -1257,9 +1257,9 @@ function buildLib(defines, dir) {
   return merge([
     gulp.src(
       [
-        "src/{core,display,shared}/*.js",
+        "src/{core,display,scripting_api,shared}/*.js",
         "!src/shared/{cffStandardStrings,fonts_utils}.js",
-        "src/{pdf,pdf.worker}.js",
+        "src/{pdf,pdf.scripting_api,pdf.worker}.js",
       ],
       { base: "src/" }
     ),

src/display/annotation_layer.js

@@ -462,6 +462,8 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
         element.setAttribute("value", textContent);
       }
 
+      element.setAttribute("id", id);
+
       element.addEventListener("input", function (event) {
         storage.setValue(id, event.target.value);
       });
@@ -470,6 +472,39 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
         event.target.setSelectionRange(0, 0);
       });
 
+      if (this.data.actions) {
+        element.addEventListener("updateFromSandbox", function (event) {
+          const data = event.detail;
+          if ("value" in data) {
+            event.target.value = event.detail.value;
+          } else if ("focus" in data) {
+            event.target.focus({ preventScroll: false });
+          }
+        });
+
+        for (const eventType of Object.keys(this.data.actions)) {
+          switch (eventType) {
+            case "Format":
+              element.addEventListener("blur", function (event) {
+                window.dispatchEvent(
+                  new CustomEvent("dispatchEventInSandbox", {
+                    detail: {
+                      field: "value",
+                      id,
+                      event: {
+                        type: "Field",
+                        name: "Format",
+                        value: event.target.value,
+                      },
+                    },
+                  })
+                );
+              });
+              break;
+          }
+        }
+      }
+
       element.disabled = this.data.readOnly;
       element.name = this.data.fieldName;
 

src/pdf.js

@@ -53,6 +53,7 @@ import { AnnotationLayer } from "./display/annotation_layer.js";
 import { apiCompatibilityParams } from "./display/api_compatibility.js";
 import { GlobalWorkerOptions } from "./display/worker_options.js";
 import { renderTextLayer } from "./display/text_layer.js";
+import { Scripting } from "./pdf.scripting_api.js";
 import { SVGGraphics } from "./display/svg.js";
 
 /* eslint-disable-next-line no-unused-vars */
@@ -164,4 +165,6 @@ export {
   renderTextLayer,
   // From "./display/svg.js":
   SVGGraphics,
+  // From "./pdf.scripting_api.js"
+  Scripting,
 };

src/pdf.scripting_api.js

@@ -0,0 +1,24 @@
+/* Copyright 2020 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { generateCode } from "./scripting_api/code_gen.js";
+
+const Scripting = {
+  getCode(objects) {
+    return generateCode(objects);
+  },
+};
+
+export { Scripting };