Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Re-factor the source parsing, in getDocument, to use switch rather than if...else

Browse Source 
Given the number of parameters that we now need to parse here, this code is no longer as readable as one would like. Hence this re-factoring, which will improve overall readability and also help with the next patch.
This commit is contained in:
Jonas Jenwald 2021-03-31 16:21:37 +02:00
parent 9c6770748c
commit 27add0f1f3
1 changed files with 46 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
src/display/api.js
View File

@ -226,49 +226,53 @@ function getDocument(src) {
worker = null; worker = null;
for (const key in source) { for (const key in source) {
if (key === "url" && typeof window !== "undefined") { const value = source[key];
// The full path is required in the 'url' field.
params[key] = new URL(source[key], window.location).href; switch (key) {
continue; case "url":
} else if (key === "range") { if (typeof window !== "undefined") {
rangeTransport = source[key]; // The full path is required in the 'url' field.
continue; params[key] = new URL(value, window.location).href;
} else if (key === "worker") { continue;
worker = source[key]; }
continue; break;
} else if (key === "data") { case "range":
// Converting string or array-like data to Uint8Array. rangeTransport = value;
const pdfBytes = source[key]; continue;
if ( case "worker":
typeof PDFJSDev !== "undefined" && worker = value;
PDFJSDev.test("GENERIC") && continue;
isNodeJS && case "data":
typeof Buffer !== "undefined" && // eslint-disable-line no-undef // Converting string or array-like data to Uint8Array.
pdfBytes instanceof Buffer // eslint-disable-line no-undef if (
) { typeof PDFJSDev !== "undefined" &&
params[key] = new Uint8Array(pdfBytes); PDFJSDev.test("GENERIC") &&
} else if (pdfBytes instanceof Uint8Array) { isNodeJS &&
// Use the data as-is when it's already a Uint8Array. typeof Buffer !== "undefined" && // eslint-disable-line no-undef
params[key] = pdfBytes; value instanceof Buffer // eslint-disable-line no-undef
} else if (typeof pdfBytes === "string") { ) {
params[key] = stringToBytes(pdfBytes); params[key] = new Uint8Array(value);
} else if ( } else if (value instanceof Uint8Array) {
typeof pdfBytes === "object" && break; // Use the data as-is when it's already a Uint8Array.
pdfBytes !== null && } else if (typeof value === "string") {
!isNaN(pdfBytes.length) params[key] = stringToBytes(value);
) { } else if (
params[key] = new Uint8Array(pdfBytes); typeof value === "object" &&
} else if (isArrayBuffer(pdfBytes)) { value !== null &&
params[key] = new Uint8Array(pdfBytes); !isNaN(value.length)
} else { ) {
throw new Error( params[key] = new Uint8Array(value);
"Invalid PDF binary data: either typed array, " + } else if (isArrayBuffer(value)) {
"string, or array-like object is expected in the data property." params[key] = new Uint8Array(value);
); } else {
} throw new Error(
continue; "Invalid PDF binary data: either typed array, " +
"string, or array-like object is expected in the data property."
);
}
continue;
} }
params[key] = source[key]; params[key] = value;
} }
params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE; params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;