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Last change
on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
823 bytes
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| 1 | var utils = require('../utils')
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| 2 | , nodes = require('../nodes');
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| 3 |
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| 4 | /**
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| 5 | * Return the opposites of the given `positions`.
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| 6 | *
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| 7 | * Examples:
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| 8 | *
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| 9 | * opposite-position(top left)
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| 10 | * // => bottom right
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| 11 | *
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| 12 | * @param {Expression} positions
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| 13 | * @return {Expression}
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| 14 | * @api public
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| 15 | */
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| 16 |
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| 17 | (module.exports = function oppositePosition(positions){
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| 18 | var expr = [];
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| 19 | utils.unwrap(positions).nodes.forEach(function(pos, i){
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| 20 | utils.assertString(pos, 'position ' + i);
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| 21 | pos = (function(){ switch (pos.string) {
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| 22 | case 'top': return 'bottom';
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| 23 | case 'bottom': return 'top';
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| 24 | case 'left': return 'right';
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| 25 | case 'right': return 'left';
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| 26 | case 'center': return 'center';
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| 27 | default: throw new Error('invalid position ' + pos);
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| 28 | }})();
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| 29 | expr.push(new nodes.Literal(pos));
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| 30 | });
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| 31 | return expr;
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| 32 | }).raw = true;
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