function ApplyBold()
{
theSelection = document.selection.createRange().text;
if(theSelection)
{
document.selection.createRange().text = "<strong>" + theSelection + "</strong>";
document.selection.anchorOffset = selStart;
}
}
0
[web] Javascript - Add HTML tags around selection
Started by InsaneBoarder234, Jun 27 2006 04:25 AM
2 replies to this topic
#1 Members - Reputation: 174
Posted 27 June 2006 - 04:25 AM
I'm having difficulty finding suitable pages about this on google. Basically I'm writing a simple editor and I want to add a few buttons that will add tags around the current selection for formatting.
So far I have this piece of javascript to apply bold to the selected piece of text.
I have a few questions..
(1) How can I only affect the selection if it is within the textarea named 'text' on the form named 'editor'?
(2) If there is no selection, or the 'text' textarea doesn't currently have keyboard focus, how can I detect this and use it to simply add "" into the textarea at the location of the cursor? (i.e. if I click at the start of the textarea, then click in another text box, then call ApplyBold() via a button, ApplyBold will insert the strong tag at the start of the 'text' textarea).
Thanks!
Progress is born from the opportunity to make mistakes.
My prize winning Connect 4 AI looks one move ahead, can you beat it? @nickstadb
My prize winning Connect 4 AI looks one move ahead, can you beat it? @nickstadb
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#2 Members - Reputation: 584
Posted 27 June 2006 - 07:32 AM
Try this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>Untitled</title>
<script type="text/javascript">
function applyTag(obj, tag)
{
wrapText(obj, '<'+tag+'>', '</'+tag+'>');
};
function wrapText(obj, beginTag, endTag)
{
if(typeof obj.selectionStart == 'number')
{
// Mozilla, Opera, and other browsers
var start = obj.selectionStart;
var end = obj.selectionEnd;
obj.value = obj.value.substring(0, start) + beginTag + obj.value.substring(start, end) + endTag + obj.value.substring(end, obj.value.length);
}
else if(document.selection)
{
// Internet Explorer
// make sure it's the textarea's selection
obj.focus();
var range = document.selection.createRange();
if(range.parentElement() != obj) return false;
if(typeof range.text == 'string')
document.selection.createRange().text = beginTag + range.text + endTag;
}
else
obj.value += text;
};
</script>
</head>
<body>
<p>Blah blah blah.</p>
<textarea id="ta" rows="10" cols="50"></textarea> <br /><br />
<input type="button" value="Bold" onclick="applyTag(document.getElementById('ta'), 'b')" />
<input type="button" value="Italics" onclick="applyTag(document.getElementById('ta'), 'i')" />
</body>
</html>
#3 Members - Reputation: 174
Posted 27 June 2006 - 08:22 AM
That works great, thanks!
Progress is born from the opportunity to make mistakes.
My prize winning Connect 4 AI looks one move ahead, can you beat it? @nickstadb
My prize winning Connect 4 AI looks one move ahead, can you beat it? @nickstadb
