1 files changed, 64 insertions, 0 deletions
diff --git a/i18n/src/parser.js b/i18n/src/parser.js
new file mode 100644
index 00000000..db31aeef
--- /dev/null
+++ b/i18n/src/parser.js
@@ -0,0 +1,64 @@
+/**
+* A simple parser to parse a number format into a pattern object
+*/
+
+exports.parsePattern = parsePattern;
+
+var PATTERN_SEP = ';',
+    DECIMAL_SEP = '.',
+    GROUP_SEP   = ',',
+    ZERO        = '0',
+    DIGIT       = '#';
+
+/**
+ * main funciton for parser
+ * @param str {string} pattern to be parsed (e.g. #,##0.###).
+ */
+function parsePattern(pattern) {
+  var p = {
+            minInt: 1,
+            minFrac: 0,
+            macFrac: 0,
+            posPre: '',
+            posSuf: '',
+            negPre: '',
+            negSuf: '',
+            gSize: 0,
+            lgSize: 0
+          };
+
+  var parts = pattern.split(PATTERN_SEP),
+      positive = parts[0],
+      negative = parts[1];
+
+  var parts = positive.split(DECIMAL_SEP),
+      integer = parts[0],
+      fraction = parts[1];
+
+  p.posPre = integer.substr(0, integer.indexOf(DIGIT));
+
+  for (var i = 0; i < fraction.length; i++) {
+    var ch = fraction.charAt(i);
+    if (ch == ZERO) p.minFrac = p.maxFrac = i + 1;
+    else if (ch == DIGIT) p.maxFrac = i + 1;
+    else p.posSuf += ch;
+  }
+
+  var groups = integer.split(GROUP_SEP);
+  p.gSize = groups[1].length;
+  p.lgSize = (groups[2] || groups[1]).length;
+
+  if (negative) {
+    var trunkLen = positive.length - p.posPre.length - p.posSuf.length,
+        pos = negative.indexOf(DIGIT);
+
+    p.negPre = negative.substr(0, pos).replace(/\'/g, '');
+    p.negSuf = negative.substr(pos + trunkLen).replace(/\'/g, '');
+  } else {
+    // hardcoded '-' sign is fine as all locale use '-' as MINUS_SIGN. (\u2212 is the same as '-')
+    p.negPre = p.posPre + '-';
+    p.negSuf = p.posSuf;
+  }
+
+  return p;
+}