XFA - Use native radio and checkbox buttons

- Remove current stuff which relies on some system fonts to avoid bad rendering.

src/core/xfa/template.js

@@ -890,71 +890,45 @@ class CheckButton extends XFAObject {
   }
 
   [$toHTML](availableSpace) {
-    // TODO: shape and mark == default.
-    const style = toStyle(this, "border", "margin");
+    // TODO: border, shape and mark.
+
+    const style = toStyle("margin");
     const size = measureToString(this.size);
 
     style.width = style.height = size;
 
-    let mark, radius;
-    if (this.shape === "square") {
-      mark = "▪";
-      radius = "10%";
-    } else {
-      mark = "●";
-      radius = "50%";
-    }
-
-    if (!style.borderRadius) {
-      style.borderRadius = radius;
-    }
-
-    if (this.mark !== "default") {
-      // TODO: To avoid some rendering issues we should use svg
-      // to draw marks.
-      switch (this.mark) {
-        case "check":
-          mark = "✓";
-          break;
-        case "circle":
-          mark = "●";
-          break;
-        case "cross":
-          mark = "✕";
-          break;
-        case "diamond":
-          mark = "♦";
-          break;
-        case "square":
-          mark = "▪";
-          break;
-        case "star":
-          mark = "★";
-          break;
-      }
-    }
-
-    if (size !== "10px") {
-      style.fontSize = size;
-      style.lineHeight = size;
-      style.width = size;
-      style.height = size;
-    }
-
+    let type;
+    let className;
+    let groupId;
+    let id;
     const fieldId = this[$getParent]()[$getParent]()[$uid];
+    const container = this[$getParent]()[$getParent]()[$getParent]();
+    if (container instanceof ExclGroup) {
+      groupId = container[$uid];
+      type = "radio";
+      className = "xfaRadio";
+      id = `${fieldId}-radio`;
+    } else {
+      type = "checkbox";
+      className = "xfaCheckbox";
+    }
+
     const input = {
       name: "input",
       attributes: {
-        class: "xfaCheckbox",
+        class: className,
+        style,
         fieldId,
-        type: "radio",
-        id: `${fieldId}-radio`,
+        type,
       },
     };
 
-    const container = this[$getParent]()[$getParent]()[$getParent]();
-    if (container instanceof ExclGroup) {
-      input.attributes.name = container[$uid];
+    if (id) {
+      input.attributes.id = id;
+    }
+
+    if (groupId) {
+      input.attributes.name = groupId;
     }
 
     return HTMLResult.success({
@@ -962,17 +936,7 @@ class CheckButton extends XFAObject {
       attributes: {
         class: "xfaLabel",
       },
-      children: [
-        input,
-        {
-          name: "span",
-          attributes: {
-            class: "xfaCheckboxMark",
-            mark,
-            style,
-          },
-        },
-      ],
+      children: [input],
     });
   }
 }

src/display/xfa_layer.js

@@ -16,20 +16,26 @@
 import { PageViewport } from "./display_utils.js";
 
 class XfaLayer {
-  static setupStorage(html, fieldId, element, storage) {
+  static setupStorage(html, fieldId, element, storage, intent) {
     const storedData = storage.getValue(fieldId, { value: null });
     switch (element.name) {
       case "textarea":
         html.textContent = storedData.value !== null ? storedData.value : "";
+        if (intent === "print") {
+          break;
+        }
         html.addEventListener("input", event => {
           storage.setValue(fieldId, { value: event.target.value });
         });
         break;
       case "input":
-        if (storedData.value !== null) {
-          html.setAttribute("value", storedData.value);
-        }
         if (element.attributes.type === "radio") {
+          if (storedData.value) {
+            html.setAttribute("checked", true);
+          }
+          if (intent === "print") {
+            break;
+          }
           html.addEventListener("change", event => {
             const { target } = event;
             for (const radio of document.getElementsByName(target.name)) {
@@ -40,7 +46,23 @@ class XfaLayer {
             }
             storage.setValue(fieldId, { value: target.checked });
           });
+        } else if (element.attributes.type === "checkbox") {
+          if (storedData.value) {
+            html.setAttribute("checked", true);
+          }
+          if (intent === "print") {
+            break;
+          }
+          html.addEventListener("input", event => {
+            storage.setValue(fieldId, { value: event.target.checked });
+          });
         } else {
+          if (storedData.value !== null) {
+            html.setAttribute("value", storedData.value);
+          }
+          if (intent === "print") {
+            break;
+          }
           html.addEventListener("input", event => {
             storage.setValue(fieldId, { value: event.target.value });
           });
@@ -66,8 +88,13 @@ class XfaLayer {
     }
   }
 
-  static setAttributes(html, element, storage) {
+  static setAttributes(html, element, storage, intent) {
     const { attributes } = element;
+    if (attributes.type === "radio") {
+      // Avoid to have a radio group when printing with the same as one
+      // already displayed.
+      attributes.name = `${attributes.name}-${intent}`;
+    }
     for (const [key, value] of Object.entries(attributes)) {
       if (value === null || value === undefined || key === "fieldId") {
         continue;
@@ -94,6 +121,7 @@ class XfaLayer {
   static render(parameters) {
     const storage = parameters.annotationStorage;
     const root = parameters.xfa;
+    const intent = parameters.intent;
     const rootHtml = document.createElement(root.name);
     if (root.attributes) {
       this.setAttributes(rootHtml, root);
@@ -134,7 +162,7 @@ class XfaLayer {
       const childHtml = document.createElement(name);
       html.appendChild(childHtml);
       if (child.attributes) {
-        this.setAttributes(childHtml, child, storage);
+        this.setAttributes(childHtml, child, storage, intent);
       }
 
       if (child.children && child.children.length > 0) {

web/xfa_layer_builder.css

@@ -125,38 +125,6 @@
   resize: none;
 }
 
-.xfaLabel > input[type="radio"] {
-  /* Use this trick to make the checkbox invisible but
-       but still focusable. */
-  position: absolute;
-  left: -99999px;
-}
-
-.xfaLabel > input[type="radio"]:focus + .xfaCheckboxMark {
-  box-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
-}
-
-.xfaCheckboxMark {
-  cursor: pointer;
-  flex: 0 0 auto;
-  border-style: solid;
-  border-width: 2px;
-  border-color: #8f8f9d;
-  font-size: 10px;
-  line-height: 10px;
-  width: 10px;
-  height: 10px;
-  text-align: center;
-  vertical-align: middle;
-  display: flex;
-  flex-direction: row;
-  align-items: center;
-}
-
-.xfaCheckbox:checked + .xfaCheckboxMark::after {
-  content: attr(mark);
-}
-
 .xfaButton {
   cursor: pointer;
   width: 100%;
@@ -169,6 +137,13 @@
   background: Highlight;
 }
 
+.xfaCheckbox,
+.xfaRadio {
+  width: 100%;
+  height: 100%;
+  border: none;
+}
+
 .xfaRich {
   white-space: pre-wrap;
 }

web/xfa_layer_builder.js

@@ -82,6 +82,7 @@ class XfaLayerBuilder {
       xfa: this.xfaHtml,
       page: null,
       annotationStorage: this.annotationStorage,
+      intent,
     };
 
     // Create an xfa layer div and render the form