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Introduce helper functions for parsing /Matrix and /BBox arrays

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This commit is contained in:
Jonas Jenwald 2024-04-30 08:47:14 +02:00
parent 52f7ff155d
commit 9b41bfc374
5 changed files with 63 additions and 69 deletions
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19
src/core/core_utils.js
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@ -19,6 +19,7 @@ import {
BaseException,
objectSize,
stringToPDFString,
Util,
warn,
} from "../shared/util.js";
import { Dict, isName, Ref, RefSet } from "./primitives.js";
@ -248,6 +249,21 @@ function isNumberArray(arr, len) {
);
}
// Returns the matrix, or the fallback value if it's invalid.
function lookupMatrix(arr, fallback) {
return isNumberArray(arr, 6) ? arr : fallback;
}
// Returns the rectangle, or the fallback value if it's invalid.
function lookupRect(arr, fallback) {
return isNumberArray(arr, 4) ? arr : fallback;
}
// Returns the normalized rectangle, or the fallback value if it's invalid.
function lookupNormalRect(arr, fallback) {
return isNumberArray(arr, 4) ? Util.normalizeRect(arr) : fallback;
}
/**
* AcroForm field names use an array like notation to refer to
* repeated XFA elements e.g. foo.bar[nnn].
@ -671,6 +687,9 @@ export {
isNumberArray,
isWhiteSpace,
log2,
lookupMatrix,
lookupNormalRect,
lookupRect,
MissingDataException,
numberToString,
ParserEOFException,