197716 - Spaces at end of lines affect centering (text-align: center, trailing whitespace)

Status: NEW

(Core :: Layout: Block and Inline, defect)

Description

[Vedran Miletic]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3) Gecko/20030312
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3) Gecko/20030312

According to W3C it shouldn't cause alignment problems, but it does.

Reproducible: Always

Steps to Reproduce:
1. Go to the page http://24.125.90.54/
Actual Results:  
Alignment is not correct, the images aren't in one row.

Expected Results:  
They should all be in the same row.

Comment 1

[Chris Lyon]

->Layout

Comment 2

[Mats Palmgren (inactive)]

I can't connect to the site and there is no testcase here.
Unless the site comes online or someone can construct a testcase from memory
this bug will be marked invalid.

Comment 3

[Vedran Miletic]

It was tested on WinXP, and on Camino on Mac. So, it's OS->All.

Comment 4

[Vedran Miletic]

Attachment: Camino on MacOS

This is how it looks on MacOS and Camino.

I will try to find someone to recreate the testcase.

Comment 5

[Vedran Miletic]

Attachment: Testcase

Is this good enough?

Comment 6

[Mats Palmgren (inactive)]

Sure, that's a good testcase.  I'm not convinced this is a bug though.
On the first and third line there is non-ignorable whitespace.  You can see
this if you "Select All".  This is what causes the images to not align.

The only whitespace that should be ignored is a single linefeed after a
start tag or before an end tag, all other consecutive whitespace are compressed
into single space that should not be ignored.  (There is known bug on the
linefeed bit (bug 2750) but I don't think that matters for your testcase.)

I see that IE aligns the left edge of the images even though it also has
a space after the first and third image, this seems like a bug in IE to me.

Comment 7

[Hixie (not reading bugmail)]

Looks valid to me. Those spaces shouldn't be having any effect in white-space:
normal blocks.

Comment 8

[Mats Palmgren (inactive)]

Ian, are you saying the spaces should be ignored or that they somehow should
not be part of the line width calculation (and thus not influence the x position
of the line under 'text-align: center')?

Comment 9

[Vedran Miletic]

Attachment: Improved testcase

Removing unneeded things, making diffrence in code more obvoious.

Comment 10

[Hixie (not reading bugmail)]

Spaces at end of white-space:normal lines should be collapsed away. See
   http://www.w3.org/TR/css3-text/#white-space-processing

Comment 11

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

I don't think that's compatible with existing implementations (at least for some
things), although I guess we could do it in standards mode.

Comment 12

[brewthatistrue]

Attachment: reduced testcase01

Comment 13

[brewthatistrue]

*** Bug 236495 has been marked as a duplicate of this bug. ***

Comment 14

[Andrew Schultz]

only drivers can set blocking flags