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1 | /* Built-in method references for those with the same name as other `lodash` methods. */
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2 | var nativeMax = Math.max,
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3 | nativeMin = Math.min;
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4 |
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5 | /**
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6 | * Gets the view, applying any `transforms` to the `start` and `end` positions.
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7 | *
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8 | * @private
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9 | * @param {number} start The start of the view.
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10 | * @param {number} end The end of the view.
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11 | * @param {Array} transforms The transformations to apply to the view.
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12 | * @returns {Object} Returns an object containing the `start` and `end`
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13 | * positions of the view.
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14 | */
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15 | function getView(start, end, transforms) {
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16 | var index = -1,
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17 | length = transforms.length;
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18 |
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19 | while (++index < length) {
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20 | var data = transforms[index],
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21 | size = data.size;
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22 |
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23 | switch (data.type) {
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24 | case 'drop': start += size; break;
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25 | case 'dropRight': end -= size; break;
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26 | case 'take': end = nativeMin(end, start + size); break;
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27 | case 'takeRight': start = nativeMax(start, end - size); break;
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28 | }
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29 | }
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30 | return { 'start': start, 'end': end };
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31 | }
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32 |
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33 | module.exports = getView;
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