Added field align property support.

Fixed string field values so that they use CosString and not CosName.

lib/mixins/acroform.js

@@ -13,6 +13,11 @@ const FIELD_FLAGS = {
   edit: 0x40000,
   sort: 0x80000
 };
+const FIELD_JUSTIFY = {
+  left: 0,
+  center: 1,
+  right: 2
+};
 
 export default {
 
@@ -63,7 +68,9 @@ export default {
     }
     let opts = Object.assign({}, options);
     opts = this._resolveFlags(opts);
+    opts = this._resolveJustify(opts);
     opts = this._resolveFont(opts);
+    opts = this._resolveStrings(opts);
     opts = Object.assign(opts, {
       Subtype: 'Widget',
       F: 4,
@@ -92,6 +99,14 @@ export default {
     return options;
   },
 
+  _resolveJustify (options) {
+    if (options.align && FIELD_JUSTIFY[options.align]) {
+      options.Q = FIELD_JUSTIFY[options.align];
+      delete options.align;
+    }
+    return options;
+  },
+
   _resolveFont (options) {
     // add current font to document-level AcroForm dict if necessary
     if (this._acroform.fonts[this._font.id] == null) {
@@ -106,6 +121,27 @@ export default {
     return options;
   },
 
+  _resolveStrings (options) {
+    if (Array.isArray(options.Opt)) {
+      let arr = [];
+      for (let idx = 0; idx < options.Opt.length; idx++) {
+        if (typeof options.Opt[idx] === 'string') {
+          arr.push(new String(options.Opt[idx]))
+        } else {
+          arr.push(options.Opt[idx])
+        }
+        arr.push(new String(options.Opt[idx]));
+      }
+      options.Opt = arr;
+    }
+    ['V', 'DV'].forEach(key => {
+      if (typeof options[key] === 'string') {
+        options[key] = new String(options[key]);
+      }
+    });
+    return options;
+  },
+
   formButton (name, x, y, w, h, options = {}) {
     options.FT = 'Btn';
     return this.formAnnot(name, x, y, w, h, options)

tests/unit/acroform.spec.js

@@ -36,7 +36,7 @@ describe('AcroForm', () => {
 
     test('standard fonts', () => {
 
-      // const docData = logData(doc);
+      const docData = logData(doc);
 
       doc.registerFont('myfont1', 'tests/fonts/Roboto-Regular.ttf')