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33 lines
1.0 KiB
33 lines
1.0 KiB
/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeMax = Math.max,
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nativeMin = Math.min;
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/**
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* Gets the view, applying any `transforms` to the `start` and `end` positions.
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*
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* @private
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* @param {number} start The start of the view.
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* @param {number} end The end of the view.
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* @param {Array} transforms The transformations to apply to the view.
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* @returns {Object} Returns an object containing the `start` and `end`
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* positions of the view.
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*/
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function getView(start, end, transforms) {
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var index = -1,
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length = transforms.length;
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while (++index < length) {
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var data = transforms[index],
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size = data.size;
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switch (data.type) {
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case 'drop': start += size; break;
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case 'dropRight': end -= size; break;
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case 'take': end = nativeMin(end, start + size); break;
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case 'takeRight': start = nativeMax(start, end - size); break;
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}
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}
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return { 'start': start, 'end': end };
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}
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module.exports = getView;
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