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If unspecified, don't crash if missing thumbnail info

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applies to stickers/images.

We might want to consider to do that is better than assuming a aspect
ratio of 600 x 800 (4:3).
This commit is contained in:
Luke Barnard 2018-06-14 14:19:30 +01:00
parent 5523c1e50a
commit c8d233c0a6
1 changed files with 14 additions and 5 deletions
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19
src/components/views/messages/MImageBody.js
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@ -185,7 +185,7 @@ export default class extends React.Component {
const content = this.props.mxEvent.getContent();
if (content.file !== undefined && this.state.decryptedUrl === null) {
let thumbnailPromise = Promise.resolve(null);
if (content.info.thumbnail_file) {
if (content.info && content.info.thumbnail_file) {
thumbnailPromise = decryptFile(
content.info.thumbnail_file,
).then(function(blob) {
@ -239,11 +239,20 @@ export default class extends React.Component {
}
_messageContent(contentUrl, thumbUrl, content) {
// If unspecifide in the thumbnail info, assume width x height to be 800 x 600.
let infoHeight = 600;
let infoWidth = 800;
if (content.info && content.info.h && content.info.w) {
infoHeight = content.info.h;
infoWidth = content.info.w;
}
// The maximum height of the thumbnail as it is rendered as an <img>
const maxHeight = Math.min(this.props.maxImageHeight || 600, content.info.h);
const maxHeight = Math.min(this.props.maxImageHeight || 600, infoHeight);
// The maximum width of the thumbnail, as dictated by its natural
// maximum height.
const maxWidth = content.info.w * maxHeight / content.info.h;
const maxWidth = infoWidth * maxHeight / infoHeight;
let img = null;
let placeholder = null;
@ -274,12 +283,12 @@ export default class extends React.Component {
const thumbnail = (
<div className="mx_MImageBody_thumbnail_container" style={{ "max-height": maxHeight + "px" }} >
{ /* Calculate aspect ratio, using %padding will size _container correctly */ }
<div style={{ paddingBottom: (100 * content.info.h / content.info.w) + '%' }}></div>
<div style={{ paddingBottom: (100 * infoHeight / infoWidth) + '%' }}></div>
{ showPlaceholder &&
<div className="mx_MImageBody_thumbnail" style={{
// Constrain width here so that spinner appears central to the loaded thumbnail
"max-width": content.info.w + "px",
"max-width": infoWidth + "px",
}}>
<div className="mx_MImageBody_thumbnail_spinner">
{ placeholder }