diabook-themes: added js for auto-growing comment-textareas

1 files changed, 46 insertions, 0 deletions

diff --git a/view/theme/diabook/js/jquery.autogrow.textarea.js b/view/theme/diabook/js/jquery.autogrow.textarea.js
new file mode 100644
index 000000000..806e34f51
--- /dev/null
+++ b/view/theme/diabook/js/jquery.autogrow.textarea.js
@@ -0,0 +1,46 @@
+(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);
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