Merge pull request #21431 from Snuffleupagus/more-isDict

Use the `isDict` helper function in a few more places

src/core/annotation.js

@@ -785,6 +785,14 @@ class Annotation {
     this._needAppearances = false;
   }
 
+  _getOperatorListNoAppearance() {
+    return {
+      opList: new OperatorList(),
+      separateForm: false,
+      separateCanvas: false,
+    };
+  }
+
   /**
    * @private
    */
@@ -1213,28 +1221,32 @@ class Annotation {
     return resources;
   }
 
+  // Whether the annotation should only be rendered on its own canvas when
+  // interactive forms are enabled. This is the case for checkbox/radio button
+  // widgets, whose checked/unchecked appearances are toggled in forms mode;
+  // other annotations (e.g. push buttons) keep their own canvas in any display
+  // mode.
+  get _ownCanvasRequiresForms() {
+    return false;
+  }
+
   async getOperatorList(evaluator, task, intent, annotationStorage) {
     const { hasOwnCanvas, id, rect } = this.data;
     let appearance = this.appearance;
     const isUsingOwnCanvas = !!(
-      hasOwnCanvas && intent & RenderingIntentFlag.DISPLAY
+      hasOwnCanvas &&
+      intent & RenderingIntentFlag.DISPLAY &&
+      (!this._ownCanvasRequiresForms ||
+        intent & RenderingIntentFlag.ANNOTATIONS_FORMS)
     );
     if (isUsingOwnCanvas && (this.width === 0 || this.height === 0)) {
       // Empty annotation, don't draw anything.
       this.data.hasOwnCanvas = false;
-      return {
-        opList: new OperatorList(),
-        separateForm: false,
-        separateCanvas: false,
-      };
+      return this._getOperatorListNoAppearance();
     }
     if (!appearance) {
       if (!isUsingOwnCanvas) {
-        return {
-          opList: new OperatorList(),
-          separateForm: false,
-          separateCanvas: false,
-        };
+        return this._getOperatorListNoAppearance();
       }
       appearance = new StringStream("", new Dict());
     }
@@ -1244,7 +1256,12 @@ class Annotation {
       RESOURCES_KEYS_OPERATOR_LIST,
       appearance
     );
-    const bbox = lookupRect(appearanceDict.getArray("BBox"), [0, 0, 1, 1]);
+    const bbox = lookupRect(appearanceDict.getArray("BBox"), [
+      0,
+      0,
+      this.width,
+      this.height,
+    ]);
     const matrix = lookupMatrix(
       appearanceDict.getArray("Matrix"),
       IDENTITY_MATRIX
@@ -2092,11 +2109,9 @@ class WidgetAnnotation extends Annotation {
       !this.data.noHTML &&
       !this.data.hasOwnCanvas
     ) {
-      return {
-        opList: new OperatorList(),
-        separateForm: true,
-        separateCanvas: false,
-      };
+      const list = this._getOperatorListNoAppearance();
+      list.separateForm = true;
+      return list;
     }
 
     if (!this._hasText) {
@@ -3148,20 +3163,58 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
     this.data.radioButton = isRadio && !isPushButton;
     this.data.pushButton = isPushButton;
     this.data.isTooltipOnly = false;
+    this.data.hasOwnCanvas = true;
+    this.data.noHTML = false;
 
     if (this.data.checkBox) {
       this._processCheckBox(params);
     } else if (this.data.radioButton) {
       this._processRadioButton(params);
     } else if (this.data.pushButton) {
-      this.data.hasOwnCanvas = true;
-      this.data.noHTML = false;
       this._processPushButton(params);
     } else {
       warn("Invalid field flags for button widget annotation");
     }
   }
 
+  get _ownCanvasRequiresForms() {
+    return this.data.checkBox || this.data.radioButton;
+  }
+
+  #getOperatorListForAppearance(
+    evaluator,
+    task,
+    intent,
+    annotationStorage,
+    rotation,
+    appearance
+  ) {
+    if (!appearance) {
+      return this._getOperatorListNoAppearance();
+    }
+
+    const savedAppearance = this.appearance;
+    const savedMatrix = lookupMatrix(
+      appearance.dict.getArray("Matrix"),
+      IDENTITY_MATRIX
+    );
+
+    if (rotation) {
+      appearance.dict.set("Matrix", this.getRotationMatrix(annotationStorage));
+    }
+
+    this.appearance = appearance;
+    const operatorList = super.getOperatorList(
+      evaluator,
+      task,
+      intent,
+      annotationStorage
+    );
+    this.appearance = savedAppearance;
+    appearance.dict.set("Matrix", savedMatrix);
+    return operatorList;
+  }
+
   async getOperatorList(evaluator, task, intent, annotationStorage) {
     if (this.data.pushButton) {
       return super.getOperatorList(
@@ -3173,6 +3226,45 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
       );
     }
 
+    if (
+      intent & RenderingIntentFlag.DISPLAY &&
+      intent & RenderingIntentFlag.ANNOTATIONS_FORMS &&
+      (this.data.checkBox || this.data.radioButton)
+    ) {
+      // Tag the dedicated canvas with the state it represents. The appearance
+      // may start with other operators (e.g. an optional content marked-content
+      // sequence), so target the `beginAnnotation` operator directly rather
+      // than assuming it's the first one.
+      const setCanvasName = (operatorList, name) => {
+        const index = operatorList.fnArray.indexOf(OPS.beginAnnotation);
+        if (index !== -1) {
+          operatorList.argsArray[index].push(name);
+        }
+      };
+      const checked = await this.#getOperatorListForAppearance(
+        evaluator,
+        task,
+        intent,
+        annotationStorage,
+        null,
+        this.checkedAppearance
+      );
+      setCanvasName(checked.opList, "checked");
+      const unchecked = await this.#getOperatorListForAppearance(
+        evaluator,
+        task,
+        intent,
+        annotationStorage,
+        null,
+        this.uncheckedAppearance
+      );
+      setCanvasName(unchecked.opList, "unchecked");
+      checked.opList.addOpList(unchecked.opList);
+      checked.separateForm ||= unchecked.separateForm;
+      checked.separateCanvas ||= unchecked.separateCanvas;
+      return checked;
+    }
+
     let value = null;
     let rotation = null;
     if (annotationStorage) {
@@ -3195,41 +3287,14 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
         : this.data.fieldValue === this.data.buttonValue;
     }
 
-    const appearance = value
-      ? this.checkedAppearance
-      : this.uncheckedAppearance;
-    if (appearance) {
-      const savedAppearance = this.appearance;
-      const savedMatrix = lookupMatrix(
-        appearance.dict.getArray("Matrix"),
-        IDENTITY_MATRIX
-      );
-
-      if (rotation) {
-        appearance.dict.set(
-          "Matrix",
-          this.getRotationMatrix(annotationStorage)
-        );
-      }
-
-      this.appearance = appearance;
-      const operatorList = super.getOperatorList(
-        evaluator,
-        task,
-        intent,
-        annotationStorage
-      );
-      this.appearance = savedAppearance;
-      appearance.dict.set("Matrix", savedMatrix);
-      return operatorList;
-    }
-
-    // No appearance
-    return {
-      opList: new OperatorList(),
-      separateForm: false,
-      separateCanvas: false,
-    };
+    return this.#getOperatorListForAppearance(
+      evaluator,
+      task,
+      intent,
+      annotationStorage,
+      rotation,
+      value ? this.checkedAppearance : this.uncheckedAppearance
+    );
   }
 
   async save(evaluator, task, annotationStorage, changes) {
@@ -3422,13 +3487,11 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
 
   _processCheckBox(params) {
     const customAppearance = params.dict.get("AP");
-    if (!(customAppearance instanceof Dict)) {
-      return;
-    }
-
-    const normalAppearance = customAppearance.get("N");
+    let normalAppearance =
+      customAppearance instanceof Dict ? customAppearance.get("N") : null;
     if (!(normalAppearance instanceof Dict)) {
-      return;
+      // Synthesize a default appearance below when the field defines none.
+      normalAppearance = null;
     }
 
     // See https://bugzilla.mozilla.org/show_bug.cgi?id=1722036.
@@ -3444,7 +3507,9 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
         : "Yes";
 
     // Don't decode the keys which are names.
-    const exportValues = [...normalAppearance.getKeys()];
+    const exportValues = normalAppearance
+      ? [...normalAppearance.getKeys()]
+      : [];
     if (exportValues.length === 0) {
       exportValues.push("Off", yes);
     } else if (exportValues.length === 1) {
@@ -3470,10 +3535,10 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
 
     this.data.exportValue = exportValues[1];
 
-    const checkedAppearance = normalAppearance.get(this.data.exportValue);
+    const checkedAppearance = normalAppearance?.get(this.data.exportValue);
     this.checkedAppearance =
       checkedAppearance instanceof BaseStream ? checkedAppearance : null;
-    const uncheckedAppearance = normalAppearance.get("Off");
+    const uncheckedAppearance = normalAppearance?.get("Off");
     this.uncheckedAppearance =
       uncheckedAppearance instanceof BaseStream ? uncheckedAppearance : null;
 

src/core/editor/pdf_editor.js

@@ -27,7 +27,15 @@ import {
   getNewAnnotationsMap,
   numberToString,
 } from "../core_utils.js";
-import { Dict, isName, Name, Ref, RefSet, RefSetCache } from "../primitives.js";
+import {
+  Dict,
+  isDict,
+  isName,
+  Name,
+  Ref,
+  RefSet,
+  RefSetCache,
+} from "../primitives.js";
 import { incrementalUpdate, writeValue } from "../writer.js";
 import { isArrayEqual, stringToBytes } from "../../shared/util.js";
 import { NameTree, NumberTree } from "../name_number_tree.js";
@@ -280,11 +288,7 @@ class PDFEditor {
       oldRefMapping.put(oldRef, newRef);
 
       if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
-        if (
-          obj instanceof Dict &&
-          isName(obj.get("Type"), "Page") &&
-          !this.currentDocument.pagesMap.has(oldRef)
-        ) {
+        if (isDict(obj, "Page") && !this.currentDocument.pagesMap.has(oldRef)) {
           throw new Error(
             "Add a deleted page to the document is not supported."
           );

src/core/struct_tree.js

@@ -19,7 +19,7 @@ import {
   stringToUTF8String,
   warn,
 } from "../shared/util.js";
-import { Dict, isName, Name, Ref, RefSetCache } from "./primitives.js";
+import { Dict, isDict, isName, Name, Ref, RefSetCache } from "./primitives.js";
 import { stringToAsciiOrUTF16BE, stringToPDFString } from "./string_utils.js";
 import { BaseStream } from "./base_stream.js";
 import { lookupNormalRect } from "./core_utils.js";
@@ -594,10 +594,7 @@ class StructElementNode {
     }
     for (let af of AFs) {
       af = this.xref.fetchIfRef(af);
-      if (!(af instanceof Dict)) {
-        continue;
-      }
-      if (!isName(af.get("Type"), "Filespec")) {
+      if (!isDict(af, "Filespec")) {
         continue;
       }
       if (!isName(af.get("AFRelationship"), "Supplement")) {

src/display/annotation_layer.js

@@ -439,9 +439,6 @@ class AnnotationElement {
       if (horizontalRadius > 0 || verticalRadius > 0) {
         const radius = `calc(${horizontalRadius}px * var(--total-scale-factor)) / calc(${verticalRadius}px * var(--total-scale-factor))`;
         style.borderRadius = radius;
-      } else if (this instanceof RadioButtonWidgetAnnotationElement) {
-        const radius = `calc(${width}px * var(--total-scale-factor)) / calc(${height}px * var(--total-scale-factor))`;
-        style.borderRadius = radius;
       }
 
       switch (data.borderStyle.style) {
@@ -2009,7 +2006,6 @@ class CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {
       );
     }
 
-    this._setBackgroundColor(element);
     this._setDefaultPropertiesFromJS(element);
 
     this.container.append(element);
@@ -2028,7 +2024,9 @@ class RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {
     const data = this.data;
     const id = data.id;
     let value = storage.getValue(id, {
-      value: data.fieldValue === data.buttonValue,
+      // A radio without an on-state (`buttonValue === null`, e.g. no /AP) must
+      // not be checked by default, otherwise `null === null` would select it.
+      value: data.buttonValue !== null && data.fieldValue === data.buttonValue,
     }).value;
     if (typeof value === "string") {
       // The value has been changed through js and set in annotationStorage.
@@ -2115,7 +2113,6 @@ class RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {
       );
     }
 
-    this._setBackgroundColor(element);
     this._setDefaultPropertiesFromJS(element);
 
     this.container.append(element);
@@ -4139,18 +4136,44 @@ class AnnotationLayer {
       if (!element) {
         continue;
       }
-
-      canvas.className = "annotationContent";
+      if (Array.isArray(canvas)) {
+        for (const cvs of canvas) {
+          cvs.className = "annotationContent";
+          cvs.ariaHidden = true;
+        }
+      } else {
+        canvas.className = "annotationContent";
+        canvas.ariaHidden = true;
+      }
+      const toRemove = [];
+      for (const child of element.children) {
+        if (child.nodeName === "CANVAS") {
+          toRemove.push(child);
+        }
+      }
+      for (const child of toRemove) {
+        child.remove();
+      }
+      const firstCanvas = Array.isArray(canvas) ? canvas[0] : canvas;
       const { firstChild } = element;
       if (!firstChild) {
-        element.append(canvas);
-      } else if (firstChild.nodeName === "CANVAS") {
-        firstChild.replaceWith(canvas);
+        element.append(firstCanvas);
       } else if (!firstChild.classList.contains("annotationContent")) {
-        firstChild.before(canvas);
+        firstChild.before(firstCanvas);
       } else {
-        firstChild.after(canvas);
+        firstChild.after(firstCanvas);
       }
+      if (Array.isArray(canvas)) {
+        let lastCanvas = firstCanvas;
+        for (let i = 1, ii = canvas.length; i < ii; i++) {
+          lastCanvas.after(canvas[i]);
+          lastCanvas = canvas[i];
+        }
+      }
+      // Drop only the entries we inserted; keep ones whose element isn't in the
+      // DOM yet so a later refresh can still pick them up instead of losing
+      // them.
+      this.#annotationCanvasMap.delete(id);
 
       const editableAnnotation = this.#editableAnnotations.get(id);
       if (!editableAnnotation) {
@@ -4168,7 +4191,12 @@ class AnnotationLayer {
         editableAnnotation.canvas = canvas;
       }
     }
-    this.#annotationCanvasMap.clear();
+  }
+
+  // Move any pending annotation canvases (e.g. higher-resolution ones rendered
+  // by the detail view) into their elements.
+  refreshCanvases() {
+    this.#setAnnotationCanvasMap();
   }
 
   getEditableAnnotations() {

src/display/canvas.js

@@ -3630,7 +3630,15 @@ class CanvasGraphics {
     }
   }
 
-  beginAnnotation(opIdx, id, rect, transform, matrix, hasOwnCanvas) {
+  beginAnnotation(
+    opIdx,
+    id,
+    rect,
+    transform,
+    matrix,
+    hasOwnCanvas,
+    canvasName
+  ) {
     // The annotations are drawn just after the page content.
     // The page content drawing can potentially have set a transform,
     // a clipping path, whatever...
@@ -3673,7 +3681,26 @@ class CanvasGraphics {
           canvasHeight
         );
         const { canvas, context } = this.annotationCanvas;
-        this.annotationCanvasMap.set(id, canvas);
+        if (canvasName) {
+          let canvases = this.annotationCanvasMap.get(id);
+          if (!canvases) {
+            canvases = [];
+            this.annotationCanvasMap.set(id, canvases);
+          }
+          canvas.setAttribute("data-canvas-name", canvasName);
+          // Replace any same-named canvas from a previous render so stale
+          // low-resolution canvases don't pile up across zooms.
+          const index = canvases.findIndex(
+            c => c.getAttribute("data-canvas-name") === canvasName
+          );
+          if (index === -1) {
+            canvases.push(canvas);
+          } else {
+            canvases[index] = canvas;
+          }
+        } else {
+          this.annotationCanvasMap.set(id, canvas);
+        }
         this.annotationCanvas.savedCtx = this.ctx;
         this.ctx = context;
         this.ctx.save();

src/display/page_viewport.js

@@ -190,7 +190,6 @@ class PageViewport {
    * @returns {Array} Array containing `x`- and `y`-coordinates of the
    *   point in the viewport coordinate space.
    * @see {@link convertToPdfPoint}
-   * @see {@link convertToViewportRectangle}
    */
   convertToViewportPoint(x, y) {
     const p = [x, y];
@@ -198,21 +197,6 @@ class PageViewport {
     return p;
   }
 
-  /**
-   * Converts PDF rectangle to the viewport coordinates.
-   * @param {Array} rect - The xMin, yMin, xMax and yMax coordinates.
-   * @returns {Array} Array containing corresponding coordinates of the
-   *   rectangle in the viewport coordinate space.
-   * @see {@link convertToViewportPoint}
-   */
-  convertToViewportRectangle(rect) {
-    const topLeft = [rect[0], rect[1]];
-    Util.applyTransform(topLeft, this.transform);
-    const bottomRight = [rect[2], rect[3]];
-    Util.applyTransform(bottomRight, this.transform);
-    return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];
-  }
-
   /**
    * Converts viewport coordinates to the PDF location. For examples, useful
    * for converting canvas pixel location into PDF one.

test/annotation_layer_builder_overrides.css

@@ -68,4 +68,26 @@
     color: red;
     font-size: 10px;
   }
+
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) {
+    img[data-canvas-name="checked"] {
+      &:has(~ input:checked) {
+        display: block;
+      }
+
+      &:has(~ input:not(:checked)) {
+        display: none;
+      }
+    }
+
+    img[data-canvas-name="unchecked"] {
+      &:has(~ input:checked) {
+        display: none;
+      }
+
+      &:has(~ input:not(:checked)) {
+        display: block;
+      }
+    }
+  }
 }

test/driver.js

@@ -94,6 +94,7 @@ async function writeSVG(svgElement, ctx) {
       setTimeout(resolve, 10);
     });
   }
+
   return loadImage(svg_xml, ctx);
 }
 
@@ -150,21 +151,40 @@ async function inlineImages(node, silentErrors = false) {
 async function convertCanvasesToImages(annotationCanvasMap, outputScale) {
   const results = new Map();
   const promises = [];
+  const canvasToImage = (canvas, key) => {
+    const { promise, resolve } = Promise.withResolvers();
+    promises.push(promise);
+    canvas.toBlob(blob => {
+      const image = document.createElement("img");
+      image.classList.add("wasCanvas");
+      image.onload = function () {
+        image.style.width = Math.floor(image.width / outputScale) + "px";
+        resolve();
+      };
+      const canvasName = canvas.getAttribute("data-canvas-name");
+      if (canvasName) {
+        image.setAttribute("data-canvas-name", canvasName);
+        let images = results.get(key);
+        if (!images) {
+          images = [];
+          results.set(key, images);
+        }
+        images.push(image);
+      } else {
+        results.set(key, image);
+      }
+      image.src = URL.createObjectURL(blob);
+    });
+  };
+
   for (const [key, canvas] of annotationCanvasMap) {
-    promises.push(
-      new Promise(resolve => {
-        canvas.toBlob(blob => {
-          const image = document.createElement("img");
-          image.classList.add("wasCanvas");
-          image.onload = function () {
-            image.style.width = Math.floor(image.width / outputScale) + "px";
-            resolve();
-          };
-          results.set(key, image);
-          image.src = URL.createObjectURL(blob);
-        });
-      })
-    );
+    if (Array.isArray(canvas)) {
+      for (const canvasItem of canvas) {
+        canvasToImage(canvasItem, key);
+      }
+    } else {
+      canvasToImage(canvas, key);
+    }
   }
   await Promise.all(promises);
   return results;

test/integration/annotation_spec.mjs

@@ -122,12 +122,12 @@ describe("Checkbox annotation", () => {
           for (const selector of selectors) {
             await page.click(selector);
             await page.waitForFunction(
-              `document.querySelector('${selector} > :first-child').checked`
+              `document.querySelector('${selector} input').checked`
             );
 
             for (const otherSelector of selectors) {
               const checked = await page.$eval(
-                `${otherSelector} > :first-child`,
+                `${otherSelector} input`,
                 el => el.checked
               );
               expect(checked)
@@ -157,7 +157,7 @@ describe("Checkbox annotation", () => {
           const selector = getAnnotationSelector("7R");
           await page.click(selector);
           await page.waitForFunction(
-            `document.querySelector('${selector} > :first-child').checked`
+            `document.querySelector('${selector} input').checked`
           );
           expect(true).withContext(`In ${browserName}`).toEqual(true);
         })
@@ -185,7 +185,7 @@ describe("Checkbox annotation", () => {
           for (const selector of selectors) {
             await page.click(selector);
             await page.waitForFunction(
-              `document.querySelector('${selector} > :first-child').checked`
+              `document.querySelector('${selector} input').checked`
             );
           }
         })

test/integration/scripting_spec.mjs

@@ -2413,49 +2413,6 @@ describe("Interaction", () => {
     });
   });
 
-  describe("Change radio property", () => {
-    let pages;
-
-    beforeEach(async () => {
-      pages = await loadAndWait("bug1922766.pdf", getAnnotationSelector("44R"));
-    });
-
-    afterEach(async () => {
-      await closePages(pages);
-    });
-
-    it("must check that a change on a radio implies the change on all the radio in the group", async () => {
-      await Promise.all(
-        pages.map(async ([browserName, page]) => {
-          await waitForScripting(page);
-
-          const checkColor = async color => {
-            await waitForSandboxTrip(page);
-            for (const i of [40, 41, 42, 43]) {
-              const bgColor = await page.$eval(
-                `[data-element-id='${i}R']`,
-                el => getComputedStyle(el).backgroundColor
-              );
-              expect(bgColor)
-                .withContext(`In ${browserName}`)
-                .toEqual(`rgb(${color.join(", ")})`);
-            }
-          };
-          await checkColor([255, 0, 0]);
-          await page.click(getAnnotationSelector("44R"));
-          await checkColor([0, 0, 255]);
-          await page.click(getAnnotationSelector("44R"));
-          await checkColor([255, 0, 0]);
-
-          await page.click(getAnnotationSelector("43R"));
-          await waitForSandboxTrip(page);
-          await page.click(getAnnotationSelector("44R"));
-          await checkColor([0, 0, 255]);
-        })
-      );
-    });
-  });
-
   describe("Date creation must be timezone consistent", () => {
     let pages;
 

test/pdfs/.gitignore

@@ -933,3 +933,5 @@
 !cidfont_cmap_overflow.pdf
 !jbig2_file_header.pdf
 !text_field_own_canvas_calc.pdf
+!bug1802506.pdf
+!checkbox_no_appearance.pdf

test/pdfs/checkbox_no_appearance.pdf

@@ -0,0 +1,30 @@
+%PDF-1.7
+%ÿÿÿÿ
+1 0 obj
+<< /Type /Catalog /Pages 2 0 R /AcroForm << /Fields [4 0 R 5 0 R] /NeedAppearances true >> >>
+endobj
+2 0 obj
+<< /Type /Pages /Kids [3 0 R] /Count 1 >>
+endobj
+3 0 obj
+<< /Type /Page /Parent 2 0 R /MediaBox [0 0 200 200] /Annots [4 0 R 5 0 R] /Resources << >> >>
+endobj
+4 0 obj
+<< /Type /Annot /Subtype /Widget /FT /Btn /T (cbOn) /Rect [30 140 70 180] /V /Yes /AS /Yes >>
+endobj
+5 0 obj
+<< /Type /Annot /Subtype /Widget /FT /Btn /T (cbOff) /Rect [90 140 130 180] /V /Off /AS /Off >>
+endobj
+xref
+0 6
+0000000000 65535 f 
+0000000015 00000 n 
+0000000124 00000 n 
+0000000181 00000 n 
+0000000291 00000 n 
+0000000400 00000 n 
+trailer
+<< /Size 6 /Root 1 0 R >>
+startxref
+511
+%%EOF

test/test_manifest.json

@@ -14387,5 +14387,23 @@
     "rounds": 1,
     "link": true,
     "type": "eq"
+  },
+  {
+    "id": "bug1802506",
+    "file": "pdfs/bug1802506.pdf",
+    "md5": "ed56da1780b8480262c7329c4419fbb5",
+    "rounds": 1,
+    "type": "eq",
+    "annotations": true,
+    "forms": true
+  },
+  {
+    "id": "checkbox_no_appearance",
+    "file": "pdfs/checkbox_no_appearance.pdf",
+    "md5": "216ff8ea24c470421ff1c528d805caea",
+    "rounds": 1,
+    "type": "eq",
+    "annotations": true,
+    "forms": true
   }
 ]

test/unit/annotation_spec.js

@@ -1776,7 +1776,7 @@ describe("annotation", function () {
       expect(opList.argsArray[0]).toEqual([
         "271R",
         [0, 0, 32, 10],
-        [32, 0, 0, 10, 0, 0],
+        [1, 0, 0, 1, 0, 0],
         [1, 0, 0, 1, 0, 0],
         false,
       ]);
@@ -2607,6 +2607,44 @@ describe("annotation", function () {
       expect(opList.argsArray[3][0][0].unicode).toEqual("4");
     });
 
+    it("should synthesize a checked appearance for checkboxes without an /AP", async function () {
+      buttonWidgetDict.set("V", Name.get("Checked"));
+      buttonWidgetDict.set("Rect", [0, 0, 20, 20]);
+      // Note: no /AP entry, so a default appearance must be synthesized.
+
+      const buttonWidgetRef = Ref.get(124, 0);
+      const xref = new XRefMock([
+        { ref: buttonWidgetRef, data: buttonWidgetDict },
+      ]);
+      const task = new WorkerTask("test checkbox without /AP");
+      const checkboxEvaluator = partialEvaluator.clone({ ignoreErrors: true });
+      const annotation = await AnnotationFactory.create(
+        xref,
+        buttonWidgetRef,
+        annotationGlobalsMock,
+        idFactoryMock
+      );
+
+      expect(annotation.data.checkBox).toEqual(true);
+      expect(annotation.data.exportValue).toEqual("Checked");
+
+      const { opList } = await annotation.getOperatorList(
+        checkboxEvaluator,
+        task,
+        RenderingIntentFlag.DISPLAY | RenderingIntentFlag.ANNOTATIONS_FORMS,
+        new Map()
+      );
+
+      // A checkmark is drawn on its own dedicated "checked" canvas.
+      expect(opList.fnArray[0]).toEqual(OPS.beginAnnotation);
+      expect(opList.fnArray.at(-1)).toEqual(OPS.endAnnotation);
+      expect(opList.fnArray).toContain(OPS.showText);
+      const [id, , , , isUsingOwnCanvas, canvasName] = opList.argsArray[0];
+      expect(id).toEqual("124R");
+      expect(isUsingOwnCanvas).toEqual(true);
+      expect(canvasName).toEqual("checked");
+    });
+
     it("should render checkboxes for printing", async function () {
       const appearanceStatesDict = new Dict();
       const normalAppearanceDict = new Dict();
@@ -2685,7 +2723,7 @@ describe("annotation", function () {
       expect(opList2.argsArray[0]).toEqual([
         "124R",
         [0, 0, 0, 0],
-        [0, 0, 0, 0, 0, 0],
+        [1, 0, 0, 1, 0, 0],
         [1, 0, 0, 1, 0, 0],
         false,
       ]);
@@ -3084,7 +3122,7 @@ describe("annotation", function () {
       expect(opList2.argsArray[0]).toEqual([
         "124R",
         [0, 0, 0, 0],
-        [0, 0, 0, 0, 0, 0],
+        [1, 0, 0, 1, 0, 0],
         [1, 0, 0, 1, 0, 0],
         false,
       ]);
@@ -3147,7 +3185,7 @@ describe("annotation", function () {
       expect(opList.argsArray[0]).toEqual([
         "124R",
         [0, 0, 0, 0],
-        [0, 0, 0, 0, 0, 0],
+        [1, 0, 0, 1, 0, 0],
         [1, 0, 0, 1, 0, 0],
         false,
       ]);

web/annotation_layer_builder.css

@@ -17,6 +17,7 @@
   color-scheme: only light;
 
   --annotation-unfocused-field-background: url("data:image/svg+xml;charset=UTF-8,<svg width='1px' height='1px' xmlns='http://www.w3.org/2000/svg'><rect width='100%' height='100%' style='fill:rgba(0, 54, 255, 0.13);'/></svg>");
+  --annotation-unfocused-field-filter: url("data:image/svg+xml;charset=UTF-8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='pdfjsFillableField' x='0%' y='0%' width='100%' height='100%' color-interpolation-filters='sRGB'><feFlood flood-color='rgb(0,54,255)' flood-opacity='0.13' result='f'/><feComposite in='f' in2='SourceGraphic' operator='over'/></filter></svg>#pdfjsFillableField");
   --input-focus-border-color: Highlight;
   --input-focus-outline: 1px solid Canvas;
   --input-unfocused-border-color: transparent;
@@ -208,10 +209,6 @@
     padding: 0;
   }
 
-  .buttonWidgetAnnotation.radioButton input {
-    border-radius: 50%;
-  }
-
   .textWidgetAnnotation textarea {
     resize: none;
   }
@@ -259,36 +256,34 @@
     outline: var(--input-focus-outline);
   }
 
-  .buttonWidgetAnnotation.checkBox input:checked::before,
-  .buttonWidgetAnnotation.checkBox input:checked::after,
-  .buttonWidgetAnnotation.radioButton input:checked::before {
-    background-color: CanvasText;
-    content: "";
-    display: block;
-    position: absolute;
-  }
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) {
+    [data-canvas-name] {
+      filter: var(--annotation-unfocused-field-filter);
+    }
 
-  .buttonWidgetAnnotation.checkBox input:checked::before,
-  .buttonWidgetAnnotation.checkBox input:checked::after {
-    height: 80%;
-    left: 45%;
-    width: 1px;
-  }
+    &:focus-within [data-canvas-name] {
+      filter: none;
+    }
 
-  .buttonWidgetAnnotation.checkBox input:checked::before {
-    transform: rotate(45deg);
-  }
+    [data-canvas-name="checked"] {
+      &:has(~ input:checked) {
+        display: block;
+      }
 
-  .buttonWidgetAnnotation.checkBox input:checked::after {
-    transform: rotate(-45deg);
-  }
+      &:has(~ input:not(:checked)) {
+        display: none;
+      }
+    }
 
-  .buttonWidgetAnnotation.radioButton input:checked::before {
-    border-radius: 50%;
-    height: 50%;
-    left: 25%;
-    top: 25%;
-    width: 50%;
+    [data-canvas-name="unchecked"] {
+      &:has(~ input:checked) {
+        display: none;
+      }
+
+      &:has(~ input:not(:checked)) {
+        display: block;
+      }
+    }
   }
 
   .textWidgetAnnotation input.comb {
@@ -317,6 +312,17 @@
     appearance: none;
   }
 
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton):has(
+      [data-canvas-name="checked"]
+    )
+    input:checked,
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton):has(
+      [data-canvas-name="unchecked"]
+    )
+    input:not(:checked) {
+    background-image: none;
+  }
+
   .fileAttachmentAnnotation .popupTriggerArea {
     height: 100%;
     width: 100%;

web/annotation_layer_builder.js

@@ -224,6 +224,10 @@ class AnnotationLayerBuilder {
     this.#eventAC = null;
   }
 
+  refreshCanvases() {
+    this.annotationLayer?.refreshCanvases();
+  }
+
   hide() {
     if (!this.div) {
       return;

web/pdf_page_detail_view.js

@@ -297,6 +297,7 @@ class PDFPageDetailView extends BasePDFPageView {
         this.canvas = prevCanvas;
       },
       () => {
+        this.pageView._refreshAnnotationLayer();
         this.dispatchPageRendered(
           /* cssTransform */ false,
           /* isDetailView */ true

web/pdf_page_view.js

@@ -484,6 +484,17 @@ class PDFPageView extends BasePDFPageView {
     }
   }
 
+  // The detail view re-renders checkbox/radio appearances at a higher
+  // resolution into the shared `annotationCanvasMap`; move them into the
+  // annotation layer so they replace the lower-resolution ones. This only
+  // consumes pending canvases (no re-render), and is a no-op until their
+  // elements exist, so it's safe to call while the layer is still rendering.
+  _refreshAnnotationLayer() {
+    if (this._annotationCanvasMap?.size) {
+      this.annotationLayer?.refreshCanvases();
+    }
+  }
+
   async #renderAnnotationEditorLayer() {
     let error = null;
     try {