Sticky zero width, height in viewBox attribute

Bug #1473955 reported by su_v on 2015-07-13
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Tavmjong Bah

Bug Description

When changing the page width and/or height via 'Document Properties > Page > Custom Size' and entering a value of '0' (zero) as intermediary step, the corresponding '0' in the document's 'viewBox' attribute gets "sticky" i.e. does not update if the page width or height is set to a positive value later on.

Viewing such a file in other SVG viewers (e.g. web browsers) causes the content to be not rendered visible:
«A negative value for <width> or <height> is an error (see Error processing). A value of zero disables rendering of the element.»

Side-effect: python-based extensions will fail with a ZeroDivisionError in getDocumentUnit() when applied in such a document (this failure was originally reported on irc by Qcoder00).

Steps to reproduce:
1) launch inkscape (default prefs, default new document)
2) draw a large rectangle (e.g. as large as the page)
3) open 'File > Document Properties > Page'
4) set Width in 'Custom size' to '0'
5) set Width in 'Custom size' to '210' (same as before)
6) save
7) view the file e.g. in Firefox

Expected result:
The rectangle drawn on the page is visible in the browser.

Actual result:
The browser displays an "empty" file (rendering is disabled).

Reproduced with Inkscape 0.91 r13725 and 0.91+devel r14242 on OS X 10.7.5.

Related branches

su_v (suv-lp) on 2015-07-13
description: updated
su_v (suv-lp) wrote :

Result of 'steps to reproduce' (with Inkscape 0.91 r13725)

su_v (suv-lp) wrote :

Fix committed to trunk in rev 14243.

Changed in inkscape:
assignee: nobody → Tavmjong Bah (tavmjong-free)
importance: Undecided → Medium
milestone: none → 0.92
status: New → Fix Committed
su_v (suv-lp) wrote :

Diff to backport r14243 to <lp:inkscape/0.91.x> - please review/test.

tags: added: backport-proposed
su_v (suv-lp) wrote :

Fix backported to 0.91.x in rev 13806.

Changed in inkscape:
milestone: 0.92 → 0.91.1
tags: removed: backport-proposed
jazzynico (jazzynico) on 2017-01-28
Changed in inkscape:
milestone: 0.91.1 → 0.92
status: Fix Committed → Fix Released
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