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-rw-r--r--template-common/lib/plugins/jquery.autogrow-textarea.js47
1 files changed, 47 insertions, 0 deletions
diff --git a/template-common/lib/plugins/jquery.autogrow-textarea.js b/template-common/lib/plugins/jquery.autogrow-textarea.js
new file mode 100644
index 000000000..2e85b98af
--- /dev/null
+++ b/template-common/lib/plugins/jquery.autogrow-textarea.js
@@ -0,0 +1,47 @@
+(function($) {
+
+ /*
+ * Auto-growing textareas; technique ripped from Facebook
+ */
+ $.fn.autogrow = function(options) {
+
+ this.filter('textarea').each(function() {
+
+ var $this = $(this),
+ minHeight = $this.height(),
+ lineHeight = $this.css('lineHeight');
+
+ var shadow = $('<div></div>').css({
+ position: 'absolute',
+ top: -10000,
+ left: -10000,
+ width: $(this).width(),
+ fontSize: $this.css('fontSize'),
+ fontFamily: $this.css('fontFamily'),
+ lineHeight: $this.css('lineHeight'),
+ resize: 'none'
+ }).appendTo(document.body);
+
+ var update = function() {
+
+ var val = this.value.replace(/</g, '&lt;')
+ .replace(/>/g, '&gt;')
+ .replace(/&/g, '&amp;')
+ .replace(/\n/g, '<br/>');
+
+ shadow.html(val);
+ $(this).css('height', Math.max(shadow.height() + 20, minHeight));
+
+ }
+
+ $(this).change(update).keyup(update).keydown(update);
+
+ update.apply(this);
+
+ });
+
+ return this;
+
+ }
+
+})(jQuery); \ No newline at end of file