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Fix annotation border style parsing by handling empty dash arrays

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The PDF specification states that empty dash arrays, i.e. arrays with
zero elements, are in fact valid. In that case the dash array simply
corresponds to a solid, unbroken line. However, this case was erroneously
being flagged as invalid and therefore the annotation was not drawn
because its width was set to zero. This commit fixes the issue by
allowing dash arrays to have a length of zero.
This commit is contained in:
Tim van der Meij 2024-04-08 16:01:30 +02:00
parent 5adad89eb3
commit d01a0bd0c8
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5 changed files with 22 additions and 4 deletions
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src/core/annotation.js
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@ -1474,9 +1474,9 @@ class AnnotationBorderStyle {
// We validate the dash array, but we do not use it because CSS does not
// allow us to change spacing of dashes. For more information, visit
// http://www.w3.org/TR/css3-background/#the-border-style.
if (Array.isArray(dashArray) && dashArray.length > 0) {
// According to the PDF specification: the elements in `dashArray`
// shall be numbers that are nonnegative and not all equal to zero.
if (Array.isArray(dashArray)) {
// The PDF specification states that elements in the dash array, if
// present, must be non-negative numbers and must not all equal zero.
let isValid = true;
let allZeros = true;
for (const element of dashArray) {
@ -1488,7 +1488,7 @@ class AnnotationBorderStyle {
allZeros = false;
}
}
if (isValid && !allZeros) {
if (dashArray.length === 0 || (isValid && !allZeros)) {
this.dashArray = dashArray;
if (forceStyle) {