197654 - html:iframe within xml document does not respect height:100% but does respect width:100%

Status: RESOLVED INVALID

(Core :: CSS Parsing and Computation, defect)

Description

[rvj]

User-Agent:       Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2.1) Gecko/20021130

if an xml document contains an html:iframe element with height:100%, the iframe
is not inheriting the containing block height.



Reproducible: Always

Steps to Reproduce:
1. create an xml document with xhtml namespace
2. create a root node and enclose the following tag
3.  <html:iframe src=""  style="height:100%;width:100%;background:blue;
border:0;" />

Actual Results:  
The height of iframe defaults to approximately 100px , width is correctly
rendered as indicated by the iframe's blue background

NB height is correctly rendered if the height is specified in pixels

Expected Results:  
The iframe should fill the current Mozilla window (all blue background)

Comment 1

[rvj]

Ive found a work around by defining the containing block as position:absolute.

Not sure if that is how it supposed to work but at least it gets round the main 
problem.

Comment 2

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Could you attach a testcase?  I suspect, though, that our behavior is correct,
since the CSS spec says that percentage heights on descendants of blocks with
'auto' height (as your root element probably has) become 'auto' heights.

Comment 3

[rvj]

Attachment: xml 100% height property fails even with inline style position:absolute

In an htm doc the style would work as expected i.e. the iframe will fill the
window	

Im an xml doc it does not even if position absolute is specified in the root
node

If however position:absolute is spcefied in an external css file, then the
entire window will be filled (see the iframe2 example that follows)

Comment 4

[rvj]

Attachment: working external css style sheet work around with position absolute for iframe2.xml

external style sheet for iframe2.xml work around

Comment 5

[rvj]

Attachment: working example using external css stylesheet with position:absolute

work around solution using external css stylesheet and posoition:absolute

Comment 6

[Boris Zbarsky [:bzbarsky]]

This bug is invalid.  The <root> element is not in the html namespace, so its
style attribute means absolutely nothing (and certainly does not mean "apply
this CSS to this element).  Putting the <root> in the html namespace leads to
the expected rendering.