DOM panel / light colors

[Benjamin Andre]

Hi,

I found the meaning of the colors, but no explanation on why the colors of dom property value is sometimes "light".

For exemple, you can see here that the property "clientWidth" is light blue, whereas "hidden" is normal blue.

Any idea ?

(this is important, this difference is the only one I found between a case that works and another cas that doesn't work... :-)

[Sebastian Zartner]

Hmm, spontaneously I'd say that's a bug. Do you have a URL and steps, so this can be reproduced?

Sebastian

[Benjamin Andre]

I made different tries and I realized that "light colors" appears only if you look at the dom while debugging.
It is then quite difficult to export and html file with the pb :-)

No, realy, I don't understand the meaning of these colors... If all properties were light it might indicates that ... the node is "fresh" ?? (joke)

[Simon Lindholm]

I *think* they might indicate that the property is readonly (has getter but no setter), and that the difference between debugging and not is whether the objects we deal with are wrapped or not (see http://code.google.com/p/fbug/issues/detail?id=5377 ).

[Benjamin ANDRE]

hum, I like the read only theory, but why when not in debugging does the color become strong again ?

Maybe your second point explain this, but I don't understand what a "wrapped object" is in this context...

Benjamin ANDRE - +33 (0)6 86 25 36 66 - CozyCloud.cc

2013/9/8 Simon Lindholm <simon.li...@gmail.com>

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[Sebastian Zartner]

Simon seems to be right with his assumption that the pale color indicates properties that are read-only. Here are the related code lines:

https://github.com/firebug/firebug/blob/master/extension/content/firebug/dom/domMemberProvider.js#L344
https://github.com/firebug/firebug/blob/master/extension/skin/classic/dom.css#L18

I added a sentence to the DOM panel reflecting that.

Though I wonder why they are not displayed in pale color for me within the DOM side panel:

That may be the bug here, because inside the main DOM panel the properties are displayed in light color. Simon, what do you think?

Sebastian

[Simon Lindholm]

Yeah, I'm pretty sure it's a bug (related to that issue I linked).

Wrapped objects are a technical term, related to privileged JavaScript in Firefox. I suppose you could google "spidermonkey wrappers" to get further information, but to simplify it a wrapper (at least, of this kind) is like a shadow version of a DOM object, that behaves subtly differently, and attempts to make it "nicer" to work with. (It is implicitly converted to a non-wrapper when passed back to non-privileged JavaScript.)

[Benjamin ANDRE]

thank you for the complete explanations, it was not easy to find : a bug in firebug... difficult to imagine ;-)
well done to both of you !

Benjamin ANDRE - +33 (0)6 86 25 36 66 - CozyCloud.cc

2013/9/9 Simon Lindholm <simon.li...@gmail.com>

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