554811 - showModalDialog does not honor center and resize options

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Angelo Borsotti]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2

window.showModalDialog can be told to center the dialog
on the desktop and to make it non-resizable. However,
these options do not produce the intended result.

Reproducible: Always

Steps to Reproduce:
1. take the example page from http://developer.mozilla.org/samples/domref/showModalDialog.html
2. add resizable: no; center: yes to the last argument of window.showModalDialog
3. open the page in the browser, and click on the button
Actual Results:  
a dialog is displayed at the top left of the deskop. The dialog can be resized.

Expected Results:  
the dialog placed at the center of the desktop, not resizable.

Comment 1

[Boris Zbarsky [:bzbarsky]]

I believe that we don't allow untrusted content to set those features by default; this applies to all window opening, not just modal dialogs.  Or do those features work with window.open?

Comment 2

[Angelo Borsotti]

These are the arguments to the window.showModalDialog function call, see:
https://developer.mozilla.org/en/DOM/window.showModalDialog
This page tells what arguments this function supports, and does not
mention that some are allowed only by some kind of content.
As a matter of fact, the width and height can be specified, and they
function properly. There are no reasons then that the centering could
instead be restricted to some content.
Centering is told to be the default too.

Comment 3

[:Gijs (he/him)]

The showModalDialog API was disabled in Firefox 56 and removed later on. As a result, I believe this bug is no longer present in (more) recent versions of Firefox. Please reopen and needinfo me if you think this bug is still relevant.

Bugmail filter: showModalDialogClosure.