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Prevent documents from intermittently opening with the zoom level set to 1% (issue 6253)

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*This fixes a regression from PR 6192.*

Under some circumstances, the `resize` event handler in `viewer.js` is fired before the scale has been set. This can lead to PDF documents being rendered at the wrong zoom level when they are opened.
It seems that a way to reliably trigger this is to, using the Firefox addon, open a PDF file that triggers the `fallback` bar, in a new background tab (i.e. middle clicking on a link, or use the context menu).

Prior to PR 6192, we checked the selected option in the `scaleSelect` dropdown instead. Since `pageAutoOption` is selected by default in `viewer.html`, this should explain why the issue wasn't visible previously.
This commit is contained in:
Jonas Jenwald 2015-07-22 23:40:38 +02:00
parent 862342189f
commit 299d05eaa5
1 changed files with 10 additions and 7 deletions
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17
web/viewer.js
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@ -1639,13 +1639,16 @@ window.addEventListener('updateviewarea', function (evt) {
window.addEventListener('resize', function webViewerResize(evt) {
if (PDFViewerApplication.initialized) {
var currentScaleValue = PDFViewerApplication.pdfViewer.currentScaleValue;
switch (currentScaleValue) {
case 'auto':
case 'page-fit':
case 'page-width':
// Note: the scale is constant for 'page-actual'.
PDFViewerApplication.pdfViewer.currentScaleValue = currentScaleValue;
break;
if (currentScaleValue === 'auto' ||
currentScaleValue === 'page-fit' ||
currentScaleValue === 'page-width') {
// Note: the scale is constant for 'page-actual'.
PDFViewerApplication.pdfViewer.currentScaleValue = currentScaleValue;
} else if (!currentScaleValue) {
// Normally this shouldn't happen, but if the scale wasn't initialized
// we set it to the default value in order to prevent any issues.
// (E.g. the document being rendered with the wrong scale on load.)
PDFViewerApplication.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
}
}
updateViewarea();