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Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
This commit is contained in:
Šimon Brandner 2021-04-24 09:41:46 +02:00 committed by J. Ryan Stinnett
parent 7e2a3e3c31
commit d0ba142b72
1 changed files with 9 additions and 0 deletions
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9
src/components/views/elements/ImageView.tsx
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@ -115,9 +115,18 @@ export default class ImageView extends React.Component<IProps, IState> {
// TODO: What if we don't have width and height props?
const imageWrapper = document.getElementsByClassName(IMAGE_WRAPPER_CLASS)[0];
const zoomX = imageWrapper.clientWidth / this.props.width;
const zoomY = imageWrapper.clientHeight / this.props.height;
// We set minZoom to the min of the zoomX and zoomY to avoid overflow in
// any direction. We also multiply by MAX_SCALE to get a gap around the
// image by default
const minZoom = Math.min(zoomX, zoomY) * MAX_SCALE;
// If minZoom is bigger or equal to 1, it means we scaling the image up
// to fit the viewport and therefore we want to disable zooming, so we
// set the maxZoom to be the same as the minZoom. Otherwise, we are
// scaling the image down - we want the user to be allowed to zoom to
// 100%
const maxZoom = minZoom >= 1 ? minZoom : 1;
if (this.state.zoom <= this.state.minZoom) this.setState({zoom: minZoom});