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Refactoring download button logic

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Yury Delendik 2013-07-12 13:14:13 -05:00
parent 077f08fa6d
commit ef658bf5f1
5 changed files with 198 additions and 132 deletions
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55
web/ui_utils.js
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@ -91,6 +91,61 @@ function getOutputScale() {
};
}
/**
* Scrolls specified element into view of its parent.
* element {Object} The element to be visible.
* spot {Object} The object with the top property -- offset from the top edge.
*/
function scrollIntoView(element, spot) {
// Assuming offsetParent is available (it's not available when viewer is in
// hidden iframe or object). We have to scroll: if the offsetParent is not set
// producing the error. See also animationStartedClosure.
var parent = element.offsetParent;
var offsetY = element.offsetTop + element.clientTop;
if (!parent) {
console.error('offsetParent is not set -- cannot scroll');
return;
}
while (parent.clientHeight == parent.scrollHeight) {
offsetY += parent.offsetTop;
parent = parent.offsetParent;
if (!parent)
return; // no need to scroll
}
if (spot)
offsetY += spot.top;
parent.scrollTop = offsetY;
}
/**
* Returns the filename or guessed filename from the url (see issue 3455).
* url {String} The original PDF location.
* @return {String} Guessed PDF file name.
*/
function getPDFFileNameFromURL(url) {
var reURI = /^(?:([^:]+:)?\/\/[^\/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
// SCHEME HOST 1.PATH 2.QUERY 3.REF
// Pattern to get last matching NAME.pdf
var reFilename = /[^\/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
var splitURI = reURI.exec(url);
var suggestedFilename = reFilename.exec(splitURI[1]) ||
reFilename.exec(splitURI[2]) ||
reFilename.exec(splitURI[3]);
if (suggestedFilename) {
suggestedFilename = suggestedFilename[0];
if (suggestedFilename.indexOf('%') != -1) {
// URL-encoded %2Fpath%2Fto%2Ffile.pdf should be file.pdf
try {
suggestedFilename =
reFilename.exec(decodeURIComponent(suggestedFilename))[0];
} catch(e) { // Possible (extremely rare) errors:
// URIError "Malformed URI", e.g. for "%AA.pdf"
// TypeError "null has no properties", e.g. for "%2F.pdf"
}
}
}
return suggestedFilename || 'document.pdf';
}
var ProgressBar = (function ProgressBarClosure() {