You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
1.0 KiB
34 lines
1.0 KiB
2 years ago
|
/* Built-in method references for those with the same name as other `lodash` methods. */
|
||
|
|
var nativeMax = Math.max,
|
||
|
|
nativeMin = Math.min;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the view, applying any `transforms` to the `start` and `end` positions.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {number} start The start of the view.
|
||
|
|
* @param {number} end The end of the view.
|
||
|
|
* @param {Array} transforms The transformations to apply to the view.
|
||
|
|
* @returns {Object} Returns an object containing the `start` and `end`
|
||
|
|
* positions of the view.
|
||
|
|
*/
|
||
|
|
function getView(start, end, transforms) {
|
||
|
|
var index = -1,
|
||
|
|
length = transforms.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var data = transforms[index],
|
||
|
|
size = data.size;
|
||
|
|
|
||
|
|
switch (data.type) {
|
||
|
|
case 'drop': start += size; break;
|
||
|
|
case 'dropRight': end -= size; break;
|
||
|
|
case 'take': end = nativeMin(end, start + size); break;
|
||
|
|
case 'takeRight': start = nativeMax(start, end - size); break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return { 'start': start, 'end': end };
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = getView;
|