Bug 281478 – text zoom should scale texts in HTML in SVG documents

• Status: NEW
• Component: SVG

[Fujii Hironori]

After 284310@main (bug#199236), we no longer need WebCore::Style::BuilderState::useSVGZoomRules().
computed font-size are same both for HTML and SVG.

[Fujii Hironori]

Pull request: https://github.com/WebKit/WebKit/pull/35203

[Radar WebKit Bug Importer]

<rdar://problem/138381179>

[Fujii Hironori]

With the WIP patch <https://github.com/WebKit/WebKit/commit/98a585cdf128de8685e8b4929de5cb6afd4a2d7a>,
in svg/zoom/page/zoom-foreignObject.svg, line-height of <xhtml:a> is zoomed by page zoom unexpectedly.
It is affected by the font size of the parent <svg:foreignObject>.

This can be worked around by adding a parent element <xhtml:html>.

diff --git a/LayoutTests/svg/zoom/page/zoom-foreignObject.svg b/LayoutTests/svg/zoom/page/zoom-foreignObject.svg
index 52675c5cee95..07e329112cff 100644
--- a/LayoutTests/svg/zoom/page/zoom-foreignObject.svg
+++ b/LayoutTests/svg/zoom/page/zoom-foreignObject.svg
@@ -5,9 +5,11 @@
 
 <!-- HTML FO text -->
 <foreignObject width="250" height="200" transform="scale(3) skewY(5) skewX(5)">
+  <xhtml:html>
   <xhtml:div>This is a text</xhtml:div>
   <xhtml:a href="http://www.example.com/">and a link.</xhtml:a><xhtml:br/>
   <xhtml:div>[HTML]</xhtml:div>
+  </xhtml:html>
 </foreignObject>
 <rect width="250" height="200" stroke="green" fill="none" />