Last modified: 2012-10-26 09:52:31 UTC

Wikimedia Bugzilla is closed!

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Bug 32197 - SVG renderer text layout problems with nested attributes


Summary:	SVG renderer text layout problems with nested attributes

Status:	RESOLVED FIXED

Product:	Wikimedia
Classification:	Unclassified
Component:	SVG rendering (Other open bugs)
Version:	unspecified
Hardware:	All All

Importance:	Normal normal (vote)
Target Milestone:	---
Assigned To:	Nobody - You can work on this!

URL:
Whiteboard:
Keywords:	upstream

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2011-11-04 03:05 UTC by Liangent
Modified:	2012-10-26 09:52 UTC (History)
CC List:	2 users (show)

See Also:
Web browser:	---
Mobile Platform:	---
Assignee Huggle Beta Tester:	---

Attachments
Add an attachment (proposed patch, testcase, etc.)

Description Liangent 2011-11-04 03:05:27 UTC

Compare https://upload.wikimedia.org/wikipedia/mediawiki/thumb/9/9b/MediaWiki_flyer_20110725-1-zh-hans.svg/1000px-MediaWiki_flyer_20110725-1-zh-hans.svg.png and Firefox's rendered image of https://upload.wikimedia.org/wikipedia/mediawiki/9/9b/MediaWiki_flyer_20110725-1-zh-hans.svg . The Firefox one is expected (the position of those gray and black text).

Comment 1 Brion Vibber 2011-11-04 17:46:48 UTC

Looks fine offhand; can you point out what's wrong specifically?

Comment 2 Liangent 2011-11-04 22:21:10 UTC

(In reply to comment #1)
> Looks fine offhand; can you point out what's wrong specifically?

1. Line 3 in headlines: "维基百科" and "，" after it are swapped
2. Line 5 in "不是程序员？" box: "支持" and "其他用户" are swapped
3. Line 6 in "不是程序员？" box: "传播" and "消息" are swapped

Comment 3 Brion Vibber 2011-11-04 22:34:50 UTC

Looks like something's going awry with the nested <tspan> elements. Trimmed down:

<text>
  <tspan>
    MediaWiki
    <tspan>
      ，
    </tspan>
    维基百科
    <tspan>
      上
    </tspan>
  </tspan>
  <tspan>
    <tspan>
      运行的软件，正在寻找
    </tspan>
    贡献者
  </tspan>
</text>

I'm seeing the same buggy mislayout using rsvg on my local dev box: Ubuntu 11.10 with rsvg 2.34.1.

Comment 4 Liangent 2011-11-04 22:36:59 UTC

I don't know much about XML structure of SVG files but Iceweasel generated that file. Is it a bug there?

Comment 5 Liangent 2011-11-04 22:38:44 UTC

ie. Are nested <tspan>s invalid?

Comment 6 Brion Vibber 2011-11-04 22:43:59 UTC

No, they're perfectly valid -- there's an upstream bug in Gnome bugzilla on what looks like the same issue seen in other files:
<https://bugzilla.gnome.org/show_bug.cgi?id=581108>

Comment 7 Brion Vibber 2011-11-04 23:20:46 UTC

Upstream bug has a provisional patch someone posted in 2010, which with a slight update appears to resolve the issue.

librsvg maintainers seem to not be very active, I'll see if we can find someone to push it...

Comment 8 Brion Vibber 2011-11-04 23:47:39 UTC

I've posted updates on the bug & emailed the original patch author and one of the current librsvg maintainers; hopefully we'll get a good communication channel going for this & other svg bugs... \o/

Comment 9 Brion Vibber 2011-11-08 00:04:26 UTC

Patch has been committed to master upstream; if it holds ok ought to make it into the Gnome 3.4 release but not promised yet. :)

Comment 10 Derk-Jan Hartman 2012-10-26 09:52:31 UTC

This problem is fixed now.

Wikimedia Bugzilla is closed!

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