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Diffstat (limited to 'themes/default/js/plugins/jquery.autogrow-textarea.js')
| -rw-r--r-- | themes/default/js/plugins/jquery.autogrow-textarea.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/themes/default/js/plugins/jquery.autogrow-textarea.js b/themes/default/js/plugins/jquery.autogrow-textarea.js new file mode 100644 index 000000000..2e85b98af --- /dev/null +++ b/themes/default/js/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, '<') + .replace(/>/g, '>') + .replace(/&/g, '&') + .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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