[BATIK-1191] Batik changed the overflow default for drawings

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.9, 1.10
• Component/s: SVG Viewer
• Assignee: Unassigned
• Reporter: Bjoern Voigt
• Created: 02/Jun/17 14:29
• Updated: 31/Oct/18 14:30

Description

If an SVG image contains objects partially or completely outside the viewbox, then these objects are completely or partially hidden, even if the view is changed manually with zoom & pan.

This bug is introduced in revision r1784917:

$ svn log -c r1784917

------------------------------------------------------------------------
r1784917 | ssteiner | 2017-03-01 12:44:53 +0100 (Wed, 01 Mar 2017) | 1 line

BATIK-1179: Clip wrongly applied
------------------------------------------------------------------------

The revision r1784917 introduced a global CSS stylesheet:

$ svn diff -c r1784917
Index: batik-svg-dom/src/main/resources/org/apache/batik/dom/svg/resources/UserAgentStyleSheet.css
===================================================================
--- batik-svg-dom/src/main/resources/org/apache/batik/dom/svg/resources/UserAgentStyleSheet.css    (revision 1784916)
+++ batik-svg-dom/src/main/resources/org/apache/batik/dom/svg/resources/UserAgentStyleSheet.css    (nonexistent)
@@ -1,6 +0,0 @@
-/*
- * The default SVG style sheet.
- */
-svg, symbol, image, marker, pattern, foreignObject { overflow: hidden }
-
-/* svg { width:attr(width); height:attr(height) } */
Index: batik-anim/src/main/resources/org/apache/batik/anim/dom/resources/UserAgentStyleSheet.css
===================================================================
--- batik-anim/src/main/resources/org/apache/batik/anim/dom/resources/UserAgentStyleSheet.css    (nonexistent)
+++ batik-anim/src/main/resources/org/apache/batik/anim/dom/resources/UserAgentStyleSheet.css    (revision 1784917)
@@ -0,0 +1,6 @@
+/*
+ * The default SVG style sheet.
+ */
+svg, symbol, image, marker, pattern, foreignObject { overflow: hidden }
+
+/* svg { width:attr(width); height:attr(height) } */

The issue can be easily shown with the attached sample.svg and Squiggle (part of the Batik SVG distribution). It is not a bug of Squiggle. Sample programs with JSVGCanvas show the same behavior.

java -jar batik-squiggle-1.8.jar sample.svg
java -jar batik-squiggle-1.9.jar sample.svg

Initially both Squiggle windows look similar. But if you make the Squiggle windows wider, then the version 1.8 variant of Squiggle shows the complete red rectangle, which is partially outside the viewbox. The version 1.9 variant keeps the red rectangle cut off on the viewbox.