XFA - By default a text ui has only one line when in a field element

- it aims to fix https://bugzilla.mozilla.org/show_bug.cgi?id=1716809.

src/core/xfa/template.js

@@ -18,6 +18,7 @@ import {
   $addHTML,
   $appendChild,
   $childrenToHTML,
+  $clean,
   $content,
   $extra,
   $finalize,
@@ -4820,11 +4821,7 @@ class TextEdit extends XFAObject {
       "on",
     ]);
     this.id = attributes.id || "";
-    this.multiLine = getInteger({
-      data: attributes.multiLine,
-      defaultValue: 1,
-      validate: x => x === 0,
-    });
+    this.multiLine = attributes.multiLine || "";
     this.use = attributes.use || "";
     this.usehref = attributes.usehref || "";
     this.vScrollPolicy = getStringOption(attributes.vScrollPolicy, [
@@ -4838,6 +4835,17 @@ class TextEdit extends XFAObject {
     this.margin = null;
   }
 
+  [$clean](builder) {
+    super[$clean](builder);
+    const parent = this[$getParent]();
+    const defaultValue = parent instanceof Draw ? 1 : 0;
+    this.multiLine = getInteger({
+      data: this.multiLine,
+      defaultValue,
+      validate: x => x === 0 || x === 1,
+    });
+  }
+
   [$toHTML](availableSpace) {
     // TODO: incomplete.
     const style = toStyle(this, "border", "font", "margin");

test/pdfs/xfa_bug1716809.pdf.link

@@ -0,0 +1 @@
+https://bugzilla.mozilla.org/attachment.cgi?id=9227437

test/test_manifest.json

@@ -938,6 +938,14 @@
        "enableXfa": true,
        "type": "eq"
     },
+    {  "id": "xfa_bug1716809",
+       "file": "pdfs/xfa_bug1716809.pdf",
+       "md5": "7192f9e27e8b84776d107f57cbe353d5",
+       "link": true,
+       "rounds": 1,
+       "enableXfa": true,
+       "type": "eq"
+    },
     {  "id": "xfa_annual_expense_report",
        "file": "pdfs/xfa_annual_expense_report.pdf",
        "md5": "06866e7a6bbc0346789208ef5f6e885c",

test/unit/xfa_tohtml_spec.js

@@ -137,7 +137,7 @@ describe("XFAFactory", function () {
           <medium stock="default" short="456pt" long="789pt"/>
           <field y="1pt" w="11pt" h="22pt" x="2pt">
             <ui>
-              <textEdit/>
+              <textEdit multiLine="0"/>
             </ui>
             <value>
               <text maxChars="123"/>
@@ -160,9 +160,54 @@ describe("XFAFactory", function () {
       expect(factory.numberPages).toEqual(1);
 
       const pages = factory.getPages();
-      const field = searchHtmlNode(pages, "name", "textarea");
+      const field = searchHtmlNode(pages, "name", "input");
 
       expect(field.attributes.maxLength).toEqual(123);
     });
+
+    it("should have an input or textarea", function () {
+      const xml = `
+<?xml version="1.0"?>
+<xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/">
+  <template xmlns="http://www.xfa.org/schema/xfa-template/3.3">
+    <subform name="root" mergeMode="matchTemplate">
+      <pageSet>
+        <pageArea>
+          <contentArea x="123pt" w="456pt" h="789pt"/>
+          <medium stock="default" short="456pt" long="789pt"/>
+          <field y="1pt" w="11pt" h="22pt" x="2pt">
+            <ui>
+              <textEdit/>
+            </ui>
+          </field>
+          <field y="1pt" w="11pt" h="22pt" x="2pt">
+            <ui>
+              <textEdit multiLine="1"/>
+            </ui>
+          </field>
+        </pageArea>
+      </pageSet>
+      <subform name="first">
+        <draw><value><text>foo</text></value></draw>
+      </subform>
+    </subform>
+  </template>
+  <xfa:datasets xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/">
+    <xfa:data>
+    </xfa:data>
+  </xfa:datasets>
+</xdp:xdp>
+      `;
+      const factory = new XFAFactory({ "xdp:xdp": xml });
+
+      expect(factory.numberPages).toEqual(1);
+
+      const pages = factory.getPages();
+      const field1 = searchHtmlNode(pages, "name", "input");
+      expect(field1).not.toEqual(null);
+
+      const field2 = searchHtmlNode(pages, "name", "textarea");
+      expect(field2).not.toEqual(null);
+    });
   });
 });