From e216889cad72949e16b1c4bee384fb26f929d0b3 Mon Sep 17 00:00:00 2001
From: Georgios Papadakis <ggppdk@users.noreply.github.com>
Date: Tue, 6 Mar 2018 00:06:27 +0200
Subject: [PATCH 1/3] Allow locking to min and / or max year to current year

---
 layouts/joomla/form/field/calendar.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/layouts/joomla/form/field/calendar.php b/layouts/joomla/form/field/calendar.php
index 0f3bde9d410ac..48edc546d6094 100644
--- a/layouts/joomla/form/field/calendar.php
+++ b/layouts/joomla/form/field/calendar.php
@@ -125,8 +125,8 @@
 			data-show-others="<?php echo $filltable; ?>"
 			data-time-24="<?php echo $timeformat; ?>"
 			data-only-months-nav="<?php echo $singleheader; ?>"
-			<?php echo !empty($minYear) ? 'data-min-year="' . $minYear . '"' : ''; ?>
-			<?php echo !empty($maxYear) ? 'data-max-year="' . $maxYear . '"' : ''; ?>
+			<?php echo strlen($minYear) ? 'data-min-year="' . $minYear . '"' : ''; ?>
+			<?php echo strlen($maxYear) ? 'data-max-year="' . $maxYear . '"' : ''; ?>
 			title="<?php echo JText::_('JLIB_HTML_BEHAVIOR_OPEN_CALENDAR'); ?>"
 		><span class="icon-calendar" aria-hidden="true"></span></button>
 		<?php if (!$readonly && !$disabled) : ?>

From f27cbd61848858f866cef472aafdfd28aaa8c3b2 Mon Sep 17 00:00:00 2001
From: Georgios Papadakis <ggppdk@users.noreply.github.com>
Date: Tue, 6 Mar 2018 00:55:49 +0200
Subject: [PATCH 2/3] Update calendar.php

---
 libraries/joomla/form/fields/calendar.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/joomla/form/fields/calendar.php b/libraries/joomla/form/fields/calendar.php
index 198714349ef6a..3bc372ff9e001 100644
--- a/libraries/joomla/form/fields/calendar.php
+++ b/libraries/joomla/form/fields/calendar.php
@@ -169,8 +169,8 @@ public function setup(SimpleXMLElement $element, $value, $group = null)
 			$this->filltable    = (string) $this->element['filltable'] ? (string) $this->element['filltable'] : 'true';
 			$this->timeformat   = (int) $this->element['timeformat'] ? (int) $this->element['timeformat'] : 24;
 			$this->singleheader = (string) $this->element['singleheader'] ? (string) $this->element['singleheader'] : 'false';
-			$this->minyear      = (string) $this->element['minyear'] ? (string) $this->element['minyear'] : null;
-			$this->maxyear      = (string) $this->element['maxyear'] ? (string) $this->element['maxyear'] : null;
+			$this->minyear      = strlen((string) $this->element['minyear']) ? (string) $this->element['minyear'] : null;
+			$this->maxyear      = strlen((string) $this->element['maxyear']) ? (string) $this->element['maxyear'] : null;
 
 			if ($this->maxyear < 0 || $this->minyear > 0)
 			{

From 243a1af670ebdae036470843d2c9a9e919bc46bb Mon Sep 17 00:00:00 2001
From: Georgios Papadakis <ggppdk@users.noreply.github.com>
Date: Tue, 6 Mar 2018 01:38:22 +0200
Subject: [PATCH 3/3] Cleared non-set variable notices

---
 layouts/joomla/form/field/calendar.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/layouts/joomla/form/field/calendar.php b/layouts/joomla/form/field/calendar.php
index 48edc546d6094..50623445b2559 100644
--- a/layouts/joomla/form/field/calendar.php
+++ b/layouts/joomla/form/field/calendar.php
@@ -125,8 +125,8 @@
 			data-show-others="<?php echo $filltable; ?>"
 			data-time-24="<?php echo $timeformat; ?>"
 			data-only-months-nav="<?php echo $singleheader; ?>"
-			<?php echo strlen($minYear) ? 'data-min-year="' . $minYear . '"' : ''; ?>
-			<?php echo strlen($maxYear) ? 'data-max-year="' . $maxYear . '"' : ''; ?>
+			<?php echo isset($minYear) && strlen($minYear) ? 'data-min-year="' . $minYear . '"' : ''; ?>
+			<?php echo isset($maxYear) && strlen($maxYear) ? 'data-max-year="' . $maxYear . '"' : ''; ?>
 			title="<?php echo JText::_('JLIB_HTML_BEHAVIOR_OPEN_CALENDAR'); ?>"
 		><span class="icon-calendar" aria-hidden="true"></span></button>
 		<?php if (!$readonly && !$disabled) : ?>