[Greasemonkey] New GM_ function request.

Nikolas Coukouma lists at atrus.org
Tue Aug 23 20:04:13 EDT 2005

Adam Judson wrote:

>On 23/08/05, Nikolas Coukouma <lists at atrus.org> wrote:
>>You'll get a security error if you use window.open . If you didn't you
>>would have access to a chrome window and be able to twiddle it:
>>var chromeWin = window.open("chrome://browser/content/pref/pref.xul",
>>"Preferences", "");
>>var chromeDoc = chromeWin.document;
>>// Insert evil here
>I'm not sure I understand this.  
>I know I get a security error if I try to insert 
>using GM, that's the problem I'm trying to solve.
>I don't get a security error using the code I suggested.  Though I should note
>that I'm not passing the "chrome" flag to openDialog.
>>Your suggestion has two noticable features: it doesn't return a
>>reference to the window and it lets you pass in parameters. I will note
>>that GM_openInTab will let you open a chrome URL in a tab and you can
>>use the usual query string mechanism (but not complete objects).
>It's not clear if you are using "feature" in a positive way here...
>I don't need a window handle, as I'd like to open the window modally,
>though I supose
>others might.  Which is the problem with using openInTab, I want modal
>behaviour, and
>I want my extension to modify values, so the script can use the modified
>values when the window closes.
I was trying to cover what currently exists and what your proposal would

>>The more general solution for "I want to use my extension from user
>>scripts" is to allow extensions to export functions to Greasemonkey.
>>I've filed a bug[1] about it, if you're interested.
>>[1] http://mozdev.org/bugs/show_bug.cgi?id=10969
>I took a look.  I'm not sure I understand what you are proposing.  How would my
>extension see the export_to_GM function?  I don't want to introduce a
>dependency on GM
>in my extension.
As I said, the solution is more general, so you'd basically export
something like "tamperdata_open" and it would wrap openDialog
appropriately. As for adding a dependency on Greasemonkey, all you'd
need to do to avoid it is wrap the export in an if block:
function tamperdata_open( form ) {
 window.openDialog("chrome://tamperdata/content/tamper.xul", "Tamper",
"modal", form);
if( export_to_GM ) {
  export_to_GM("tamperdata_open", someFunc);

I mentioned this as an alternative because GM_openDialog is pretty
specific; not by itself, but it offers very little over window.open and
GM_openInTab. The only feature missing is the ability to pass object
arguments to the window, which doesn't seem terribly common.


More information about the Greasemonkey mailing list