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

extensions/chromium/preferences_schema.json

@@ -151,6 +151,10 @@
       "type": "boolean",
       "default": true
     },
+    "enableScripting": {
+      "type": "boolean",
+      "default": false
+    },
     "enablePermissions": {
       "type": "boolean",
       "default": false

gulpfile.js

@@ -316,6 +316,23 @@ function createMainBundle(defines) {
     .pipe(replaceJSRootName(mainAMDName, "pdfjsLib"));
 }
 
+function createScriptingBundle(defines) {
+  var mainAMDName = "pdfjs-dist/build/pdf.scripting";
+  var mainOutputName = "pdf.scripting.js";
+
+  var mainFileConfig = createWebpackConfig(defines, {
+    filename: mainOutputName,
+    library: mainAMDName,
+    libraryTarget: "umd",
+    umdNamedDefine: true,
+  });
+  return gulp
+    .src("./src/scripting_api/initialization.js")
+    .pipe(webpack2Stream(mainFileConfig))
+    .pipe(replaceWebpackRequire())
+    .pipe(replaceJSRootName(mainAMDName, "pdfjsScripting"));
+}
+
 function createWorkerBundle(defines) {
   var workerAMDName = "pdfjs-dist/build/pdf.worker";
   var workerOutputName = "pdf.worker.js";
@@ -1036,6 +1053,9 @@ gulp.task(
       createMainBundle(defines).pipe(
         gulp.dest(MOZCENTRAL_CONTENT_DIR + "build")
       ),
+      createScriptingBundle(defines).pipe(
+        gulp.dest(MOZCENTRAL_CONTENT_DIR + "build")
+      ),
       createWorkerBundle(defines).pipe(
         gulp.dest(MOZCENTRAL_CONTENT_DIR + "build")
       ),

src/display/annotation_layer.js

@@ -468,6 +468,8 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
         element.setAttribute("value", textContent);
       }
 
+      element.setAttribute("id", id);
+
       element.addEventListener("input", function (event) {
         storage.setValue(id, event.target.value);
       });
@@ -476,6 +478,35 @@ 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: {
+                      id,
+                      name: "Format",
+                      value: event.target.value,
+                    },
+                  })
+                );
+              });
+              break;
+          }
+        }
+      }
+
       element.disabled = this.data.readOnly;
       element.name = this.data.fieldName;
 

src/scripting_api/aform.js

@@ -0,0 +1,46 @@
+/* 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.
+ */
+
+class AForm {
+  constructor(document, app, util) {
+    this._document = document;
+    this._app = app;
+    this._util = util;
+  }
+
+  AFNumber_Format(
+    nDec,
+    sepStyle,
+    negStyle,
+    currStyle,
+    strCurrency,
+    bCurrencyPrepend
+  ) {
+    const event = this._document._event;
+    if (!event.value) {
+      return;
+    }
+
+    nDec = Math.abs(nDec);
+    const value = event.value.trim().replace(",", ".");
+    let number = Number.parseFloat(value);
+    if (isNaN(number) || !isFinite(number)) {
+      number = 0;
+    }
+    event.value = number.toFixed(nDec);
+  }
+}
+
+export { AForm };

src/scripting_api/app.js

@@ -0,0 +1,61 @@
+/* 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 { EventDispatcher } from "./event.js";
+import { NotSupportedError } from "./error.js";
+import { PDFObject } from "./pdf_object.js";
+
+class App extends PDFObject {
+  constructor(data) {
+    super(data);
+    this._document = data._document;
+    this._objects = Object.create(null);
+    this._eventDispatcher = new EventDispatcher(
+      this._document,
+      data.calculationOrder,
+      this._objects
+    );
+
+    // used in proxy.js to check that this the object with the backdoor
+    this._isApp = true;
+  }
+
+  // This function is called thanks to the proxy
+  // when we call app['random_string'] to dispatch the event.
+  _dispatchEvent(pdfEvent) {
+    this._eventDispatcher.dispatch(pdfEvent);
+  }
+
+  get activeDocs() {
+    return [this._document.wrapped];
+  }
+
+  set activeDocs(_) {
+    throw new NotSupportedError("app.activeDocs");
+  }
+
+  alert(
+    cMsg,
+    nIcon = 0,
+    nType = 0,
+    cTitle = "PDF.js",
+    oDoc = null,
+    oCheckbox = null
+  ) {
+    this._send({ command: "alert", value: cMsg });
+  }
+}
+
+export { App };

src/scripting_api/console.js

@@ -0,0 +1,38 @@
+/* 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 { PDFObject } from "./pdf_object.js";
+
+class Console extends PDFObject {
+  clear() {
+    this._send({ id: "clear" });
+  }
+
+  hide() {
+    /* Not implemented */
+  }
+
+  println(msg) {
+    if (typeof msg === "string") {
+      this._send({ command: "println", value: "PDF.js Console:: " + msg });
+    }
+  }
+
+  show() {
+    /* Not implemented */
+  }
+}
+
+export { Console };

src/scripting_api/doc.js

@@ -0,0 +1,48 @@
+/* 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 { PDFObject } from "./pdf_object.js";
+
+class Doc extends PDFObject {
+  constructor(data) {
+    super(data);
+
+    this._printParams = null;
+    this._fields = Object.create(null);
+    this._event = null;
+  }
+
+  calculateNow() {
+    this._eventDispatcher.calculateNow();
+  }
+
+  getField(cName) {
+    if (typeof cName !== "string") {
+      throw new TypeError("Invalid field name: must be a string");
+    }
+    if (cName in this._fields) {
+      return this._fields[cName];
+    }
+    for (const [name, field] of Object.entries(this._fields)) {
+      if (name.includes(cName)) {
+        return field;
+      }
+    }
+
+    return undefined;
+  }
+}
+
+export { Doc };

src/scripting_api/error.js

@@ -0,0 +1,23 @@
+/* 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.
+ */
+
+class NotSupportedError extends Error {
+  constructor(name) {
+    super(`${name} isn't supported in PDF.js`);
+    this.name = "NotSupportedError";
+  }
+}
+
+export { NotSupportedError };

src/scripting_api/event.js

@@ -0,0 +1,79 @@
+/* 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.
+ */
+
+class Event {
+  constructor(data) {
+    this.change = data.change || "";
+    this.changeEx = data.changeEx || null;
+    this.commitKey = data.commitKey || 0;
+    this.fieldFull = data.fieldFull || false;
+    this.keyDown = data.keyDown || false;
+    this.modifier = data.modifier || false;
+    this.name = data.name;
+    this.rc = true;
+    this.richChange = data.richChange || [];
+    this.richChangeEx = data.richChangeEx || [];
+    this.richValue = data.richValue || [];
+    this.selEnd = data.selEnd || 0;
+    this.selStart = data.selStart || 0;
+    this.shift = data.shift || false;
+    this.source = data.source || null;
+    this.target = data.target || null;
+    this.targetName = data.targetName || "";
+    this.type = "Field";
+    this.value = data.value || null;
+    this.willCommit = data.willCommit || false;
+  }
+}
+
+class EventDispatcher {
+  constructor(document, calculationOrder, objects) {
+    this._document = document;
+    this._calculationOrder = calculationOrder;
+    this._objects = objects;
+
+    this._document.obj._eventDispatcher = this;
+  }
+
+  dispatch(baseEvent) {
+    const id = baseEvent.id;
+    if (!(id in this._objects)) {
+      return;
+    }
+
+    const name = baseEvent.name.replace(" ", "");
+    const source = this._objects[id];
+    const event = (this._document.obj._event = new Event(baseEvent));
+    const oldValue = source.obj.value;
+
+    this.runActions(source, source, event, name);
+    if (event.rc && oldValue !== event.value) {
+      source.wrapped.value = event.value;
+    }
+  }
+
+  runActions(source, target, event, eventName) {
+    event.source = source.wrapped;
+    event.target = target.wrapped;
+    event.name = eventName;
+    event.rc = true;
+    if (!target.obj._runActions(event)) {
+      return true;
+    }
+    return event.rc;
+  }
+}
+
+export { Event, EventDispatcher };