Support comb textfields for printing

mozilla · Aug 7, 2020 · 06b0c71 · 06b0c71
1 parent 0255383
commit 06b0c71
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Showing 2 changed files with 66 additions and 0 deletions.
diff --git a/src/core/annotation.js b/src/core/annotation.js
@@ -982,6 +982,16 @@ class WidgetAnnotation extends Annotation {
  const vPadding = defaultPadding + Math.abs(descent) * fontSize;
  const defaultAppearance = this.data.defaultAppearance;
 
+ if (this.data.comb) {
+ return this._getCombAppearance(
+ defaultAppearance,
+ value,
+ totalWidth,
+ hPadding,
+ vPadding
+ );
+ }
+
  if (this.data.multiLine) {
  return this._getMultilineAppearance(
  defaultAppearance,
@@ -1129,6 +1139,22 @@ class TextWidgetAnnotation extends WidgetAnnotation {
  this.data.maxLen !== null;
  }
 
+ _getCombAppearance(defaultAppearance, text, width, hPadding, vPadding) {
+ const combWidth = (width / this.data.maxLen).toFixed(2);
+ const buf = [];
+ for (const character of text) {
+ buf.push(`(${escapeString(character)}) Tj`);
+ }
+
+ const renderedComb = buf.join(` ${combWidth} 0 Td `);
+ return (
+ "/Tx BMC q BT " +
+ defaultAppearance +
+ ` 1 0 0 1 ${hPadding} ${vPadding} Tm ${renderedComb}` +
+ " ET Q EMC"
+ );
+ }
+
  _getMultilineAppearance(
  defaultAppearance,
  text,

diff --git a/test/unit/annotation_spec.js b/test/unit/annotation_spec.js
@@ -1717,6 +1717,46 @@ describe("annotation", function () {
  done();
  }, done.fail);
  });
+
+ it("should render comb for printing", function (done) {
+ textWidgetDict.set("Ff", AnnotationFieldFlag.COMB);
+ textWidgetDict.set("MaxLen", 4);
+
+ const textWidgetRef = Ref.get(271, 0);
+ const xref = new XRefMock([
+ { ref: textWidgetRef, data: textWidgetDict },
+ fontRefObj,
+ ]);
+ const task = new WorkerTask("test print");
+ partialEvaluator.xref = xref;
+
+ AnnotationFactory.create(
+ xref,
+ textWidgetRef,
+ pdfManagerMock,
+ idFactoryMock
+ )
+ .then(annotation => {
+ const id = annotation.data.id;
+ const annotationStorage = {};
+ annotationStorage[id] = "aa(aa)a\\";
+ return annotation._getAppearance(
+ partialEvaluator,
+ task,
+ annotationStorage
+ );
+ }, done.fail)
+ .then(appearance => {
+ expect(appearance).toEqual(
+ "/Tx BMC q BT /Helv 5 Tf 1 0 0 1 2 2 Tm" +
+ " (a) Tj 8.00 0 Td (a) Tj 8.00 0 Td (\\() Tj" +
+ " 8.00 0 Td (a) Tj 8.00 0 Td (a) Tj" +
+ " 8.00 0 Td (\\)) Tj 8.00 0 Td (a) Tj" +
+ " 8.00 0 Td (\\\\) Tj ET Q EMC"
+ );
+ done();
+ }, done.fail);
+ });
  });
 
  describe("ButtonWidgetAnnotation", function () {