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Convert CommonJS exports to ES6-compatible exports

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We use `export default` begrudgingly here. Ideally we'd use just `export`, though this entire SDK expects things to be exported as a default. Instead of breaking everything, we'll sacrifice our export pattern for a smaller diff - a later commit can always do the default export -> regular export conversion.
This commit is contained in:
Travis Ralston 2019-12-19 17:45:24 -07:00
parent 0b0fe92b17
commit 344dac4fb9
147 changed files with 649 additions and 620 deletions
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71
src/ImageUtils.js
View file

@ -16,41 +16,38 @@ limitations under the License.
'use strict';
module.exports = {
/**
* Returns the actual height that an image of dimensions (fullWidth, fullHeight)
* will occupy if resized to fit inside a thumbnail bounding box of size
* (thumbWidth, thumbHeight).
*
* If the aspect ratio of the source image is taller than the aspect ratio of
* the thumbnail bounding box, then we return the thumbHeight parameter unchanged.
* Otherwise we return the thumbHeight parameter scaled down appropriately to
* reflect the actual height the scaled thumbnail occupies.
*
* This is very useful for calculating how much height a thumbnail will actually
* consume in the timeline, when performing scroll offset calcuations
* (e.g. scroll locking)
*/
thumbHeight: function(fullWidth, fullHeight, thumbWidth, thumbHeight) {
if (!fullWidth || !fullHeight) {
// Cannot calculate thumbnail height for image: missing w/h in metadata. We can't even
// log this because it's spammy
return undefined;
}
if (fullWidth < thumbWidth && fullHeight < thumbHeight) {
// no scaling needs to be applied
return fullHeight;
}
const widthMulti = thumbWidth / fullWidth;
const heightMulti = thumbHeight / fullHeight;
if (widthMulti < heightMulti) {
// width is the dominant dimension so scaling will be fixed on that
return Math.floor(widthMulti * fullHeight);
} else {
// height is the dominant dimension so scaling will be fixed on that
return Math.floor(heightMulti * fullHeight);
}
},
};
/**
* Returns the actual height that an image of dimensions (fullWidth, fullHeight)
* will occupy if resized to fit inside a thumbnail bounding box of size
* (thumbWidth, thumbHeight).
*
* If the aspect ratio of the source image is taller than the aspect ratio of
* the thumbnail bounding box, then we return the thumbHeight parameter unchanged.
* Otherwise we return the thumbHeight parameter scaled down appropriately to
* reflect the actual height the scaled thumbnail occupies.
*
* This is very useful for calculating how much height a thumbnail will actually
* consume in the timeline, when performing scroll offset calcuations
* (e.g. scroll locking)
*/
export function thumbHeight(fullWidth, fullHeight, thumbWidth, thumbHeight) {
if (!fullWidth || !fullHeight) {
// Cannot calculate thumbnail height for image: missing w/h in metadata. We can't even
// log this because it's spammy
return undefined;
}
if (fullWidth < thumbWidth && fullHeight < thumbHeight) {
// no scaling needs to be applied
return fullHeight;
}
const widthMulti = thumbWidth / fullWidth;
const heightMulti = thumbHeight / fullHeight;
if (widthMulti < heightMulti) {
// width is the dominant dimension so scaling will be fixed on that
return Math.floor(widthMulti * fullHeight);
} else {
// height is the dominant dimension so scaling will be fixed on that
return Math.floor(heightMulti * fullHeight);
}
}