Jonas Jenwald 5565a6f8bf Slightly refactor the pages rotation handling code in the viewer
This changes both `PDFViewer` and `PDFThumbnailViewer` to return early in the `pagesRotation` setters if the rotation doesn't change.
It also fixes an existing issue, in `PDFViewer`, that would cause errors if the rotation changes *before* the scale has been set to a non-default value.

Finally, in preparation for subsequent patches, it also refactors the rotation code in `web/app.js` to update the thumbnails and trigger rendering with the new `rotationchanging` event.
2017-09-09 11:27:05 +02:00
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2017-08-30 19:45:13 +02:00