Onclick,将短代码/ bbcode添加到textarea？

Question

我花了大约2个小时搜索javascript,这将为我提供简单的选项,为textarea添加新的"onclick,插入文本"按钮,但不幸的是我无法找到我想要的东西.

我有textarea:

<textarea name="user-submitted-content" rows="5" data-required="true" placeholder="<?php _e('Post Content', 'usp'); ?>" class="usp-textarea"></textarea>

我想要这样的javascript:

    var newText = "[" + shortcode + "]" + selectedText + "[/" + shortcode + "]"; 

而且我可以添加如下按钮:

<input type="button" value="youtube" onclick="formatText ('youtube');" /> 
<input type="button" value="text" onclick="formatText ('text');" />  

当我点击"youtube"按钮时,它应该[youtube][/youtube]在textarea中添加/插入:

上面的代码我从一个javascript示例中获取了一个带有标签的textarea选定文本:

<script type="text/javascript"> 
<!-- 
    function formatText (tag) { 
        var selectedText = document.selection.createRange().text; 

        if (selectedText != "") { 
            var newText = "[" + tag + "]" + selectedText + "[/" + tag + "]"; 
            document.selection.createRange().text = newText; 
        } 
    } 
//--> 
</script> 

<form name="my_form"> 
    <textarea name="my_textarea"></textarea><br /> 
    <input type="button" value="bold" onclick="formatText ('b');" /> 
    <input type="button" value="italic" onclick="formatText ('i');" /> 
    <input type="button" value="underline" onclick="formatText ('u');" /> 
</form>

经过几次更改,我认为它也可以用于我想要的.我真的需要这个.

Answer 1

在文本区域中添加文本：

<script type="text/javascript"> 
function formatText(tag) {
   var Field = document.getElementById('mytextarea');
   var val = Field.value;
   var selected_txt = val.substring(Field.selectionStart, Field.selectionEnd);
   var before_txt = val.substring(0, Field.selectionStart);
   var after_txt = val.substring(Field.selectionEnd, val.length);
   Field.value += '[' + tag + ']' + '[/' + tag + ']';
}
</script> 

<form name="my_form"> 
    <textarea id="mytextarea"></textarea><br /> 
    <input type="button" value="youtube" onclick="formatText ('youtube');" /> 
    <input type="button" value="dailymotion" onclick="formatText ('dailymotion');" /> 
    <input type="button" value="vimeo" onclick="formatText ('vimeo');" /> 
</form>

替换文本区域中的文本：

<script type="text/javascript"> 
function formatText(tag) {
   var Field = document.getElementById('mytextarea');
   var val = Field.value;
   var selected_txt = val.substring(Field.selectionStart, Field.selectionEnd);
   var before_txt = val.substring(0, Field.selectionStart);
   var after_txt = val.substring(Field.selectionEnd, val.length);
   Field.value = '[' + tag + ']' + '[/' + tag + ']';
}
</script> 

<form name="my_form"> 
    <textarea id="mytextarea"></textarea><br /> 
    <input type="button" value="youtube" onclick="formatText ('youtube');" /> 
    <input type="button" value="dailymotion" onclick="formatText ('dailymotion');" /> 
    <input type="button" value="vimeo" onclick="formatText ('vimeo');" /> 
</form>

例子

附加： http: //jsfiddle.net/aSgFa/

替换： http: //jsfiddle.net/bAQEs/

还：

<script type="text/javascript"> 
function formatText(tag) {
   var Field = document.getElementById('user-submitted-content');
   var val = Field.value;
   var selected_txt = val.substring(Field.selectionStart, Field.selectionEnd);
   var before_txt = val.substring(0, Field.selectionStart);
   var after_txt = val.substring(Field.selectionEnd, val.length);
   Field.value += '' + tag + '';
}
</script>

<div class="buttons">
    <input type="button" value="youtube" onclick="formatText ('[video]YouTubeURL[/video]\n[description]Write your description[/description]');" />  
</div>