Leading white spaces should be ignored when parsing an SVG list property

[Mathias Bynens]

Created attachment 406774 [details]
test case showing either a red background (fail) or a green background (pass)

This SVG filter definition doesn't have an effect, because Safari apparently cannot handle the newline characters in the `values` attribute value:

  <filter id="f">
    <feColorMatrix values="
      0 0 0 0 0
      1 1 1 0 0
      0 0 0 0 0
      0 0 0 1 0">
  </filter>

Rewriting the attribute value without any newlines (or dynamically updating the attribute value via JS, as done in the attached test case) causes the filter to work as expected:

  <filter id="f">
    <feColorMatrix values="0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0">
  </filter>

Please support newlines in `<feColorMatrix values>`.

[Mathias Bynens]

Created attachment 406775 [details]
test case with simpler workaround

[Mathias Bynens]

Turns out only the leading newline is problematic. The other newlines don’t need to be removed.

Rewriting

  <filter id="f">
    <feColorMatrix values="
      0 0 0 0 0
      1 1 1 0 0
      0 0 0 0 0
      0 0 0 1 0">
  </filter>

as

  <filter id="f">
    <feColorMatrix values="0 0 0 0 0
                           1 1 1 0 0
                           0 0 0 0 0
                           0 0 0 1 0">
  </filter>

…is a sufficient workaround.

[Radar WebKit Bug Importer]

<rdar://problem/67726601>

[Said Abou-Hallawa]

Created attachment 407320 [details]
Patch

[Sam Weinig]

Comment on attachment 407320 [details]
Patch

Nice. Our whitespace ignoring for SVG is quite odd, glad to see we improving on inconsistencies here.

[EWS]

Committed r266206: <https://trac.webkit.org/changeset/266206>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 407320 [details].