how expand/move range object

[Thomas]

Hi dudes,

I have a range object for text (not the one in the IE, the one for
Mozilla). Now I have a function to reduce/move the range in the text
to the LEFT, e.g.:
range.setStart( range.startCont ainer, startPos-1);
range.setEnd(ra nge.endContaine r, endPos-1);
range ist the range object created via
window.getSelec tion.getRangeAt (0).
Now I have the problem to extend or simply move the range to the
RIGHT.
range.setEnd(ra nge.endContaine r, endPos + 1);
range.setStart( range.startCont ainer, startPos + 1);
I thought I could simply switch the sign, but this doesn't work, I get
the following error (yes, I exchanged the order for expanding, so that
first the endContainer is moved and afterwards the startContainer ;-)
):

Error: [Exception... "Index or size is negative or greater than the
allowed amount" code: "1" nsresult: "0x80530001
(NS_ERROR_DOM_I NDEX_SIZE_ERR)" location: "xxx.html Line: 79"]
Source File: xxx.html
Line: 79

Thx for any help,
Thomas

[Martin Honnen]

Re: how expand/move range object



Thomas wrote:
[color=blue]
> I have a range object for text (not the one in the IE, the one for
> Mozilla). Now I have a function to reduce/move the range in the text
> to the LEFT, e.g.:
> range.setStart( range.startCont ainer, startPos-1);
> range.setEnd(ra nge.endContaine r, endPos-1);
> range ist the range object created via
> window.getSelec tion.getRangeAt (0).
> Now I have the problem to extend or simply move the range to the
> RIGHT.
> range.setEnd(ra nge.endContaine r, endPos + 1);
> range.setStart( range.startCont ainer, startPos + 1);
> I thought I could simply switch the sign, but this doesn't work, I get
> the following error (yes, I exchanged the order for expanding, so that
> first the endContainer is moved and afterwards the startContainer ;-)
> ):
>
> Error: [Exception... "Index or size is negative or greater than the
> allowed amount" code: "1" nsresult: "0x80530001
> (NS_ERROR_DOM_I NDEX_SIZE_ERR)" location: "xxx.html Line: 79"]
> Source File: xxx.html
> Line: 79[/color]

That will probably depend on what kind of node the current end or
startContainer is and whether there is anything left to move to. If
needed you must change the container.

--

Martin Honnen

http://JavaScript.FAQTs.com/