1 files changed, 72 insertions, 0 deletions
diff --git a/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js b/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js
new file mode 100644
index 00000000..c29a04c3
--- /dev/null
+++ b/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js
@@ -0,0 +1,72 @@
+var split = require('../../../utils/split');
+var startsAsUrl = require('./starts-as-url');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var EXPRESSION_PATTERN = /^expression\(.*\)$/;
+var ANY_FUNCTION_PATTERN = /^(-(?:moz|ms|o|webkit)-[a-z-]+|[a-z-]+)\((.+)\)$/;
+var TOKEN_SEPARATOR_PATTERN = /([\s,/])/;
+
+var DOT_ZERO_PATTERN = /(^|\D)\.0+(\D|$)/g;
+var FRACTION_PATTERN = /\.([1-9]*)0+(\D|$)/g;
+var LEADING_ZERO_FRACTION_PATTERN = /(^|\D)0\.(\d)/g;
+var MINUS_ZERO_FRACTION_PATTERN = /([^\w\d-]|^)-0([^.]|$)/g;
+var ZERO_PREFIXED_UNIT_PATTERN = /(^|\s)0+([1-9])/g;
+
+function optimizeRecursively(value) {
+  var functionTokens;
+  var tokens;
+
+  if (startsAsUrl(value)) {
+    return value;
+  }
+
+  if (EXPRESSION_PATTERN.test(value)) {
+    return value;
+  }
+
+  functionTokens = ANY_FUNCTION_PATTERN.exec(value);
+
+  if (!functionTokens) {
+    return optimizeFractions(value);
+  }
+
+  tokens = split(functionTokens[2], TOKEN_SEPARATOR_PATTERN)
+    .map(function(token) { return optimizeRecursively(token); });
+
+  return functionTokens[1] + '(' + tokens.join('') + ')';
+}
+
+function optimizeFractions(value) {
+  if (value.indexOf('0') == -1) {
+    return value;
+  }
+
+  if (value.indexOf('-') > -1) {
+    value = value
+      .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2')
+      .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2');
+  }
+
+  return value
+    .replace(ZERO_PREFIXED_UNIT_PATTERN, '$1$2')
+    .replace(DOT_ZERO_PATTERN, '$10$2')
+    .replace(FRACTION_PATTERN, function(match, nonZeroPart, suffix) {
+      return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
+    })
+    .replace(LEADING_ZERO_FRACTION_PATTERN, '$1.$2');
+}
+
+var plugin = {
+  level1: {
+    value: function fraction(name, value, options) {
+      if (!options.level[OptimizationLevel.One].replaceZeroUnits) {
+        return value;
+      }
+
+      return optimizeRecursively(value);
+    }
+  }
+};
+
+module.exports = plugin;