One problem you are also going to run into when limiting the number of
characters is what happens when someone enters a large number of new
lines. Ie one person could enter some text that appears ok within the
boundaries you define, but another could enter the same text littered
with line breaks everywhere, same text but now needs a much larger
area to display it as the user intended, which might break whatever
boundaries you are needing to enforce.
I've had this issue before and in the end I found it's better to set a
high enough limit for most users and rethink your output methods,
rather than try to restrict everyone (ie truncate and add a 'more'
link etc). If that's possible.
cheers,
Steve
On 01/01/2009, at 10:43 PM, Jeremy Thomerson wrote:
To do this correctly, you're going to basically need to do one of two
things:
1 - strip all HTML out of the shortened version and only show plain
text
(convert <BR> and <P> tags to new lines, then use regex to remove
all HTML,
then truncate to length).
2 - parse the HTML, count the non-html characters, keeping track of
which
tags are open, and when you get to the number of characters where
you want
to cut it off, close all of your open HTML tags.
If you don't do one of those two things, you will end up with open
tags
really messing up your page.
--
Jeremy Thomerson
http://www.wickettraining.com
On Thu, Jan 1, 2009 at 1:09 PM, jchappelle <[email protected]>
wrote:
I have strings in a databse that are raw html text and it is being
displayed
on a blog page. Users are able to edit the text using the TinyMCE
component
and therefore add formatting to their blog entries. I am using the
setEscapeModelStrings(false) to correctly display the html
formatting.
However I would like to limit the text length.
I have created a component called LimitedTextPanel that almost works.
However, when I check the length of the text to test whether or not
it is
over the limit, the html formatting text is included in the length.
This
poses a problem because text with a great deal of formatting html,
which is
invisible to the user, actually gets cut off way before it should be.
My code for my current incorrect implementation is at the bottom.
Can someone help?
abstract public class LimitedTextPanel extends Panel
{
abstract protected AbstractLink makeMoreLink(final String id);
private static final long serialVersionUID = 1L;
private static final int DEFAULT_TRUNC_LEN = 150;
private TruncatingTextModel truncModel;
public LimitedTextPanel(final String id, final IModel model)
{
this(id, model, DEFAULT_TRUNC_LEN);
}
public LimitedTextPanel(final String id, final IModel model,
final
int
truncLen)
{
super(id, model);
truncModel = new TruncatingTextModel(model, truncLen);
Label textLabel = new Label("text", truncModel);
textLabel.setEscapeModelStrings(false);
add(textLabel);
AbstractLink more = makeMoreLink("more");
more.setVisible(truncModel.isTruncated());
add(more);
}
private class TruncatingTextModel implements IModel
{
private static final long serialVersionUID = 1L;
private int truncLen;
private IModel model;
public TruncatingTextModel(final IModel model, final
int
truncLen)
{
this.truncLen = truncLen;
this.model = model;
}
public void detach(){}
public void setObject(Object arg0){}
private String getText()
{
return (String)model.getObject();
}
public Object getObject()
{
if(isTruncated())
{
return getText().substring(0,
Math.min(getText().length(), truncLen)) +
"...";
}
return getText();
}
public boolean isTruncated()
{
return getText().length() > truncLen;
}
}
}
--
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