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Move the getPdfFilenameFromUrl helper function from web/ui_utils.js and into src/display/display_utils.js

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It seems reasonable to place this alongside the *similar* `getFilenameFromUrl` helper function. This way, with the changes in the next patch, we also avoid having to expose the `isDataScheme` function in the API itself and we instead expose `getPdfFilenameFromUrl` in the API (which feels overall more appropriate).
This commit is contained in:
Jonas Jenwald 2021-03-16 11:56:31 +01:00
parent a164941351
commit bd9dee1544
8 changed files with 225 additions and 226 deletions
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55
web/ui_utils.js
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@ -570,60 +570,6 @@ function noContextMenuHandler(evt) {
evt.preventDefault();
}
function isDataSchema(url) {
let i = 0;
const ii = url.length;
while (i < ii && url[i].trim() === "") {
i++;
}
return url.substring(i, i + 5).toLowerCase() === "data:";
}
/**
* Returns the filename or guessed filename from the url (see issue 3455).
* @param {string} url - The original PDF location.
* @param {string} defaultFilename - The value returned if the filename is
* unknown, or the protocol is unsupported.
* @returns {string} Guessed PDF filename.
*/
function getPDFFileNameFromURL(url, defaultFilename = "document.pdf") {
if (typeof url !== "string") {
return defaultFilename;
}
if (isDataSchema(url)) {
console.warn(
"getPDFFileNameFromURL: " +
'ignoring "data:" URL for performance reasons.'
);
return defaultFilename;
}
const reURI = /^(?:(?:[^:]+:)?\/\/[^/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
// SCHEME HOST 1.PATH 2.QUERY 3.REF
// Pattern to get last matching NAME.pdf
const reFilename = /[^/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
const splitURI = reURI.exec(url);
let suggestedFilename =
reFilename.exec(splitURI[1]) ||
reFilename.exec(splitURI[2]) ||
reFilename.exec(splitURI[3]);
if (suggestedFilename) {
suggestedFilename = suggestedFilename[0];
if (suggestedFilename.includes("%")) {
// URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf
try {
suggestedFilename = reFilename.exec(
decodeURIComponent(suggestedFilename)
)[0];
} catch (ex) {
// Possible (extremely rare) errors:
// URIError "Malformed URI", e.g. for "%AA.pdf"
// TypeError "null has no properties", e.g. for "%2F.pdf"
}
}
}
return suggestedFilename || defaultFilename;
}
function normalizeWheelEventDirection(evt) {
let delta = Math.hypot(evt.deltaX, evt.deltaY);
const angle = Math.atan2(evt.deltaY, evt.deltaX);
@ -1063,7 +1009,6 @@ export {
getActiveOrFocusedElement,
getOutputScale,
getPageSizeInches,
getPDFFileNameFromURL,
getVisibleElements,
isPortraitOrientation,
isValidRotation,