From 080640ab15afd6588f52082d90af86a3922cca65 Mon Sep 17 00:00:00 2001
From: colinf <colinf@mac.com>
Date: Wed, 14 Nov 2012 14:21:07 +0000
Subject: [PATCH 1/3] Constrain view to specified from/to years

---
 lib/calendar.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/lib/calendar.js b/lib/calendar.js
index 6551f4f..5c133cc 100644
--- a/lib/calendar.js
+++ b/lib/calendar.js
@@ -43,6 +43,7 @@ function Calendar(date) {
   this.days.on('month', this.menuChange.bind(this, 'month'));
   this.show(date || new Date);
   this.days.on('change', function(date){
+    if (self.invalidDate(date)) { return };
     self.emit('change', date);
   });
 }
@@ -92,6 +93,7 @@ Calendar.prototype.select = function(date){
  */
 
 Calendar.prototype.show = function(date){
+  if (this.invalidDate(date)) { return this };
   this._date = date;
   this.days.show(date);
   return this;
@@ -109,6 +111,8 @@ Calendar.prototype.show = function(date){
 Calendar.prototype.showYearSelect = function(from, to){
   from = from || this._date.getFullYear() - 10;
   to = to || this._date.getFullYear() + 10;
+  this._from = from;
+  this._to = to;
   this.days.yearMenu(from, to);
   this.show(this._date);
   return this;
@@ -194,3 +198,18 @@ Calendar.prototype.menuChange = function(action){
   this.emit('view change', date, action);
   return this;
 };
+
+/**
+ * Check if date is outside the from/to years specified.
+ *
+ * @return {Boolean}
+ * @api private
+ */
+
+Calendar.prototype.invalidDate = function(date) {
+  var year = date.getFullYear();
+  if ((this._from && year < this._from) || (this._to && year > this._to)) {
+    return true;
+  }
+  return false;
+}

From 3a19c009d169426539916e3729d40e4205d0c027 Mon Sep 17 00:00:00 2001
From: colinf <colinf@mac.com>
Date: Wed, 14 Nov 2012 15:46:32 +0000
Subject: [PATCH 2/3] Allow for reverse range when checking date

---
 lib/calendar.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/calendar.js b/lib/calendar.js
index 5c133cc..01aef27 100644
--- a/lib/calendar.js
+++ b/lib/calendar.js
@@ -208,7 +208,12 @@ Calendar.prototype.menuChange = function(action){
 
 Calendar.prototype.invalidDate = function(date) {
   var year = date.getFullYear();
-  if ((this._from && year < this._from) || (this._to && year > this._to)) {
+  
+  // allow for reversed range with from > to
+  var from = this._to < this._from ? this._to : this._from;
+  var to = this._to < this._from ? this._from : this._to;
+
+  if ((from && year < from) || (to && year > to)) {
     return true;
   }
   return false;

From 528c40c8b3891d01819d3758ca74bc6a8b02ce69 Mon Sep 17 00:00:00 2001
From: colinf <colinf@mac.com>
Date: Wed, 14 Nov 2012 17:41:27 +0000
Subject: [PATCH 3/3] improve return condition for invalidDate

---
 lib/calendar.js | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/calendar.js b/lib/calendar.js
index 01aef27..475e06e 100644
--- a/lib/calendar.js
+++ b/lib/calendar.js
@@ -213,8 +213,5 @@ Calendar.prototype.invalidDate = function(date) {
   var from = this._to < this._from ? this._to : this._from;
   var to = this._to < this._from ? this._from : this._to;
 
-  if ((from && year < from) || (to && year > to)) {
-    return true;
-  }
-  return false;
+  return year < from || year > to;
 }