| var packNumber = require('./Number').pack; |
| var LENGTH_UNIT = { |
| // absolute length units |
| 'px': true, |
| 'mm': true, |
| 'cm': true, |
| 'in': true, |
| 'pt': true, |
| 'pc': true, |
| |
| // relative length units |
| 'em': true, |
| 'ex': true, |
| 'ch': true, |
| 'rem': true, |
| |
| // viewport-percentage lengths |
| 'vh': true, |
| 'vw': true, |
| 'vmin': true, |
| 'vmax': true, |
| 'vm': true |
| }; |
| |
| module.exports = function compressDimension(node, item) { |
| var value = packNumber(node.value, item); |
| |
| node.value = value; |
| |
| if (value === '0' && this.declaration !== null && this.atrulePrelude === null) { |
| var unit = node.unit.toLowerCase(); |
| |
| // only length values can be compressed |
| if (!LENGTH_UNIT.hasOwnProperty(unit)) { |
| return; |
| } |
| |
| // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11 |
| // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11 |
| if (this.declaration.property === '-ms-flex' || |
| this.declaration.property === 'flex') { |
| return; |
| } |
| |
| // issue #222: don't remove units inside calc |
| if (this['function'] && this['function'].name === 'calc') { |
| return; |
| } |
| |
| item.data = { |
| type: 'Number', |
| loc: node.loc, |
| value: value |
| }; |
| } |
| }; |