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| author | Vjacheslav Trushkin <cyberalien@gmail.com> | 2013-04-09 18:38:59 +0300 |
|---|---|---|
| committer | Vjacheslav Trushkin <cyberalien@gmail.com> | 2013-04-12 16:46:54 +0300 |
| commit | 88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767 (patch) | |
| tree | 255eca04046201f5598136902cf52f39612c19cd /phpBB/assets | |
| parent | c25dfef770e440dec9f1d1eeb71e5ef8c3ffbb66 (diff) | |
| download | forums-88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767.tar forums-88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767.tar.gz forums-88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767.tar.bz2 forums-88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767.tar.xz forums-88072fd6c2c3ec6cc6d2a880bd76a9c601fd0767.zip | |
[ticket/10741] Function to resize textarea elements
New function to automatically resize textarea elements
as user types text
PHPBB3-10741
Diffstat (limited to 'phpBB/assets')
| -rw-r--r-- | phpBB/assets/javascript/core.js | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/phpBB/assets/javascript/core.js b/phpBB/assets/javascript/core.js index 8bbea8b8c9..6fe71d141a 100644 --- a/phpBB/assets/javascript/core.js +++ b/phpBB/assets/javascript/core.js @@ -568,4 +568,89 @@ phpbb.addAjaxCallback('toggle_link', function() { el.parent().attr('class', toggleClass); }); +/** +* Automatically resize textarea +* +* This function automatically resizes textarea elements when user +* types text. +* +* @param jQuery item jQuery object to resize +* @param object options Optional parameter that adjusts default +* configuration. See configuration variable +*/ +phpbb.resizeTextArea = function(items) { + // Configuration + var configuration = { + minWindowHeight: 500, // Minimum browser window height when textareas are resized + minHeight: 200, // Minimum height of textarea + maxHeight: 500, // Maximum height of textarea + heightDiff: 200, // Minimum difference between window and textarea height + // In following callbacks parameter "item" is jQuery object. "this" points to DOM object + resizeCallback: function(item) { }, // Function to call after resizing textarea. + resetCallback: function(item) { } // Function to call when resize has been canceled + } + + if (arguments.length > 1) + { + configuration = $.extend(configuration, arguments[1]); + } + + function resetAutoResize(item) + { + var $item = $(item); + if ($item.hasClass('auto-resized')) + { + $(item).css('height', '').removeClass('auto-resized'); + configuration.resetCallback.call(item, $item); + } + }; + + function autoResize(item) + { + function setHeight(height) + { + $item.css('height', height + 'px').addClass('auto-resized'); + configuration.resizeCallback.call(item, $item); + } + + var windowHeight = $(window).height(); + + if (windowHeight < configuration.minWindowHeight) + { + resetAutoResize(item); + return; + } + + var maxHeight = Math.min(Math.max(windowHeight - configuration.heightDiff, configuration.minHeight), configuration.maxHeight), + $item = $(item), + height = parseInt($item.height()), + scrollHeight = (item.scrollHeight) ? item.scrollHeight : 0; + + if (height > maxHeight) + { + setHeight(maxHeight); + } + else if (scrollHeight > (height + 5)) + { + setHeight(Math.min(maxHeight, scrollHeight)); + } + }; + + items.bind('focus change keyup', function() { + $(this).each(function() { + autoResize(this); + }); + }).css('resize', 'none').change(); + + $(window).resize(function() { + items.each(function() { + if ($(this).hasClass('auto-resized')) + { + autoResize(this); + } + }); + }); +}; + + })(jQuery); // Avoid conflicts with other libraries |