[BATIK-927] Batik should display anchor "xlink:title" attribute contents as a tooltip - ASF JIRA

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Details

Type: Bug
Status: Open
Resolution: Unresolved
Affects Version/s: 1.8
Fix Version/s: None
Component/s: Bridge
Labels:
None
Environment:
Operating System: All
Platform: All

Description

A tooltip is not displayed whenever a anchor ("a" element) has the "xlink:title" attribute [1] set.

Batik already displays the contents of "title" and "desc" elements as tooltips, as suggested by the SVG specification [2], so I'd say we should also display the link title.

I'm not sure how precedence should be handled (when a given link has "xlink:title" attribute and child "title"/"desc" elements), but it is suggested [3] that "xlink:title", when set, should take precedence over the other.

A current workaround consists of adding a "title" child element to the anchor with the same content as the "xlink:title" attribute, which is then rendered by Batik. A test case with this idea was implemented [4] during experiments in order to force a pointer cursor in ASV3: one would expect a tooltip when hovering on the blue (leftmost) circle.

[1] http://www.w3.org/TR/SVG/struct.html#XLinkTitleAttribute
[2] http://www.w3.org/TR/SVG/struct.html#DescriptionAndTitleElements
[3] http://www.w3.org/Graphics/SVG/IG/wiki/Accessibility_Activity#Title_As_Tooltip
[4] http://heldermagalhaes.com/stuff/svg/hacks/ASV3-EmulatePointerCursor.svg