XFA - Add support to print XFA forms

src/pdf.js

@@ -23,6 +23,7 @@ import {
   isValidFetchUrl,
   LinkTarget,
   loadScript,
+  PageViewport,
   PDFDateString,
   RenderingCancelledException,
 } from "./display/display_utils.js";
@@ -135,6 +136,7 @@ export {
   isPdfFile,
   LinkTarget,
   loadScript,
+  PageViewport,
   PDFDateString,
   RenderingCancelledException,
   // From "./display/api.js":

web/firefox_print_service.js

@@ -14,6 +14,7 @@
  */
 
 import { RenderingCancelledException, shadow } from "pdfjs-lib";
+import { getXfaHtmlForPrinting } from "./ui_utils.js";
 import { PDFPrintServiceFactory } from "./app.js";
 
 // Creates a placeholder with div and canvas with right size for the page.
@@ -33,6 +34,7 @@ function composePage(
   canvas.height = Math.floor(size.height * PRINT_UNITS);
 
   const canvasWrapper = document.createElement("div");
+  canvasWrapper.setAttribute("class", "printedPage");
   canvasWrapper.appendChild(canvas);
   printContainer.appendChild(canvasWrapper);
 
@@ -130,6 +132,11 @@ FirefoxPrintService.prototype = {
     const body = document.querySelector("body");
     body.setAttribute("data-pdfjsprinting", true);
 
+    if (pdfDocument.isPureXfa) {
+      getXfaHtmlForPrinting(printContainer, pdfDocument);
+      return;
+    }
+
     for (let i = 0, ii = pagesOverview.length; i < ii; ++i) {
       composePage(
         pdfDocument,

web/pdf_print_service.js

@@ -14,6 +14,7 @@
  */
 
 import { PDFPrintServiceFactory, PDFViewerApplication } from "./app.js";
+import { getXfaHtmlForPrinting } from "./ui_utils.js";
 import { viewerCompatibilityParams } from "./viewer_compatibility.js";
 
 let activeService = null;
@@ -139,6 +140,11 @@ PDFPrintService.prototype = {
   },
 
   renderPages() {
+    if (this.pdfDocument.isPureXfa) {
+      getXfaHtmlForPrinting(this.printContainer, this.pdfDocument);
+      return Promise.resolve();
+    }
+
     const pageCount = this.pagesOverview.length;
     const renderNextPage = (resolve, reject) => {
       this.throwIfInactive();
@@ -157,8 +163,12 @@ PDFPrintService.prototype = {
         this._printResolution,
         this._optionalContentConfigPromise
       )
-        .then(this.useRenderedPage.bind(this))
-        .then(function () {
+        .then(() => {
+          if (!this.pdfDocument.isPureXfa) {
+            this.useRenderedPage.bind(this);
+          }
+        })
+        .then(() => {
           renderNextPage(resolve, reject);
         }, reject);
     };
@@ -181,6 +191,7 @@ PDFPrintService.prototype = {
     }
 
     const wrapper = document.createElement("div");
+    wrapper.setAttribute("class", "printedPage");
     wrapper.appendChild(img);
     this.printContainer.appendChild(wrapper);
 

web/ui_utils.js

@@ -13,6 +13,9 @@
  * limitations under the License.
  */
 
+import { DefaultXfaLayerFactory } from "./xfa_layer_builder.js";
+import { PageViewport } from "pdfjs-lib";
+
 const CSS_UNITS = 96.0 / 72.0;
 const DEFAULT_SCALE_VALUE = "auto";
 const DEFAULT_SCALE = 1.0;
@@ -994,6 +997,29 @@ function apiPageModeToSidebarView(mode) {
   return SidebarView.NONE; // Default value.
 }
 
+function getXfaHtmlForPrinting(printContainer, pdfDocument) {
+  const xfaHtml = pdfDocument.allXfaHtml;
+  const factory = new DefaultXfaLayerFactory();
+  const scale = Math.round(CSS_UNITS * 100) / 100;
+  for (const xfaPage of xfaHtml.children) {
+    const page = document.createElement("div");
+    page.setAttribute("class", "xfaPrintedPage");
+    printContainer.appendChild(page);
+
+    const { width, height } = xfaPage.attributes.style;
+    const viewBox = [0, 0, parseInt(width), parseInt(height)];
+    const viewport = new PageViewport({ viewBox, scale, rotation: 0 });
+
+    const builder = factory.createXfaLayerBuilder(
+      page,
+      null,
+      pdfDocument.annotationStorage,
+      xfaPage
+    );
+    builder.render(viewport, "print");
+  }
+}
+
 export {
   animationStarted,
   apiPageLayoutToSpreadMode,
@@ -1010,6 +1036,7 @@ export {
   getOutputScale,
   getPageSizeInches,
   getVisibleElements,
+  getXfaHtmlForPrinting,
   isPortraitOrientation,
   isValidRotation,
   isValidScrollMode,

web/viewer.css

@@ -1772,7 +1772,8 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
   .toolbar,
   #loadingBox,
   #errorWrapper,
-  .textLayer {
+  .textLayer,
+  .canvasWrapper {
     display: none;
   }
   #viewerContainer {
@@ -1816,7 +1817,7 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
     height: 100%;
   }
   /* wrapper around (scaled) print canvas elements */
-  #printContainer > div {
+  #printContainer > .printedPage {
     page-break-after: always;
     page-break-inside: avoid;
 
@@ -1829,8 +1830,17 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
     justify-content: center;
     align-items: center;
   }
-  #printContainer canvas,
-  #printContainer img {
+
+  #printContainer > .xfaPrintedPage {
+    page-break-after: always;
+    page-break-inside: avoid;
+    width: 100%;
+    height: 100%;
+    position: relative;
+  }
+
+  .printedPage canvas,
+  .printedPage img {
     /* The intrinsic canvas / image size will make sure that we fit the page. */
     max-width: 100%;
     max-height: 100%;

web/xfa_layer_builder.css

@@ -262,3 +262,10 @@
 .xfaTable .xfaRlRow > div {
   flex: 1;
 }
+
+@media print {
+  .xfaTextfield,
+  .xfaSelect {
+    background-color: transparent;
+  }
+}

web/xfa_layer_builder.js

@@ -26,9 +26,10 @@ class XfaLayerBuilder {
   /**
    * @param {XfaLayerBuilderOptions} options
    */
-  constructor({ pageDiv, pdfPage, annotationStorage }) {
+  constructor({ pageDiv, pdfPage, xfaHtml, annotationStorage }) {
     this.pageDiv = pageDiv;
     this.pdfPage = pdfPage;
+    this.xfaHtml = xfaHtml;
     this.annotationStorage = annotationStorage;
 
     this.div = null;
@@ -42,34 +43,54 @@ class XfaLayerBuilder {
    *   annotations is complete.
    */
   render(viewport, intent = "display") {
-    return this.pdfPage
-      .getXfa()
-      .then(xfa => {
-        if (this._cancelled) {
-          return;
-        }
-        const parameters = {
-          viewport: viewport.clone({ dontFlip: true }),
-          div: this.div,
-          xfa,
-          page: this.pdfPage,
-          annotationStorage: this.annotationStorage,
-        };
+    if (intent === "display") {
+      return this.pdfPage
+        .getXfa()
+        .then(xfa => {
+          if (this._cancelled) {
+            return;
+          }
+          const parameters = {
+            viewport: viewport.clone({ dontFlip: true }),
+            div: this.div,
+            xfa,
+            page: this.pdfPage,
+            annotationStorage: this.annotationStorage,
+          };
 
-        if (this.div) {
-          XfaLayer.update(parameters);
-        } else {
-          // Create an xfa layer div and render the form
-          this.div = document.createElement("div");
-          this.pageDiv.appendChild(this.div);
-          parameters.div = this.div;
+          if (this.div) {
+            XfaLayer.update(parameters);
+          } else {
+            // Create an xfa layer div and render the form
+            this.div = document.createElement("div");
+            this.pageDiv.appendChild(this.div);
+            parameters.div = this.div;
 
-          XfaLayer.render(parameters);
-        }
-      })
-      .catch(error => {
-        console.error(error);
-      });
+            XfaLayer.render(parameters);
+          }
+        })
+        .catch(error => {
+          console.error(error);
+        });
+    }
+
+    // intent === "print".
+    const parameters = {
+      viewport: viewport.clone({ dontFlip: true }),
+      div: this.div,
+      xfa: this.xfaHtml,
+      page: null,
+      annotationStorage: this.annotationStorage,
+    };
+
+    // Create an xfa layer div and render the form
+    const div = document.createElement("div");
+    this.pageDiv.appendChild(div);
+    parameters.div = div;
+
+    XfaLayer.render(parameters);
+
+    return null;
   }
 
   cancel() {
@@ -92,12 +113,19 @@ class DefaultXfaLayerFactory {
    * @param {HTMLDivElement} pageDiv
    * @param {PDFPage} pdfPage
    * @param {AnnotationStorage} [annotationStorage]
+   * @param {Object} [xfaHtml]
    */
-  createXfaLayerBuilder(pageDiv, pdfPage, annotationStorage = null) {
+  createXfaLayerBuilder(
+    pageDiv,
+    pdfPage,
+    annotationStorage = null,
+    xfaHtml = null
+  ) {
     return new XfaLayerBuilder({
       pageDiv,
       pdfPage,
       annotationStorage,
+      xfaHtml,
     });
   }
 }