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rOACCT/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js
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populate-components.js
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			var configuration = require('../../configuration');
			var InvalidPropertyError = require('../../invalid-property-error');

			function populateComponents(properties, validator, warnings) {
			var component;
			var j, m;

			for (var i = properties.length - 1; i >= 0; i--) {
			var property = properties[i];
			var descriptor = configuration[property.name];

			if (!property.dynamic && descriptor && descriptor.shorthand) {
			if (onlyValueIsVariable(property, validator) \|\| moreThanOneValueIsVariable(property, validator)) {
			property.optimizable = false;
			continue;
			}

			property.shorthand = true;
			property.dirty = true;

			try {
			property.components = descriptor.breakUp(property, configuration, validator);

			if (descriptor.shorthandComponents) {
			for (j = 0, m = property.components.length; j < m; j++) {
			component = property.components[j];
			component.components = configuration[component.name].breakUp(component, configuration, validator);
			}
			}
			} catch (e) {
			if (e instanceof InvalidPropertyError) {
			property.components = []; // this will set property.unused to true below
			warnings.push(e.message);
			} else {
			throw e;
			}
			}

			if (property.components.length > 0) {
			property.multiplex = property.components[0].multiplex;
			} else {
			property.unused = true;
			}
			}
			}
			}

			function onlyValueIsVariable(property, validator) {
			return property.value.length == 1 && validator.isVariable(property.value[0][1]);
			}

			function moreThanOneValueIsVariable(property, validator) {
			return property.value.length > 1
			&& property.value.filter(
			function(value) {
			return validator.isVariable(value[1]);
			}
			).length > 1;
			}

			module.exports = populateComponents;