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Merge pull request #9586 from Snuffleupagus/pageSize-api-rotate

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Ensure that `PDFPageProxy.pageSizeInches` handles non-default /Rotate entries correctly
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Tim van der Meij 2018-03-25 18:03:32 +02:00 • committed by GitHub
commit 5c1a16ba6e
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5 changed files with 56 additions and 25 deletions
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22
web/ui_utils.js
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@ -269,6 +269,27 @@ function roundToDivide(x, div) {
return r === 0 ? x : Math.round(x - r + div);
}
/**
* Gets the size of the specified page, converted from PDF units to inches.
* @param {Object} An Object containing the properties: {Array} `view`,
* {number} `userUnit`, and {number} `rotate`.
* @return {Object} An Object containing the properties: {number} `width`
* and {number} `height`, given in inches.
*/
function getPageSizeInches({ view, userUnit, rotate, }) {
const [x1, y1, x2, y2] = view;
// We need to take the page rotation into account as well.
const changeOrientation = rotate % 180 !== 0;
const width = (x2 - x1) / 72 * userUnit;
const height = (y2 - y1) / 72 * userUnit;
return {
width: (changeOrientation ? height : width),
height: (changeOrientation ? width : height),
};
}
/**
* Generic helper to find out what elements are visible within a scroll pane.
*/
@ -634,6 +655,7 @@ export {
parseQueryString,
getVisibleElements,
roundToDivide,
getPageSizeInches,
approximateFraction,
getOutputScale,
scrollIntoView,