[Webkit-unassigned] [Bug 240867] New: <text>, <tspan> position is not respected when white-space is applied and element contains text nodes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=240867

            Bug ID: 240867
           Summary: <text>, <tspan> position is not respected when
                    white-space is applied and element contains text nodes
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gtktsc at gmail.com
                CC: sabouhallawa at apple.com, zimmermann at kde.org

Created attachment 459718

  --> https://bugs.webkit.org/attachment.cgi?id=459718&action=review

Example of working and broken <text> nodes in SVG when white-space is applied

When <text> node has `white-space` property set to `pre-wrap` or `pre-line` and it contains <tspan> nodes and text nodes combined (for example newline character or empty space between <tspan>) children overlap on each other - their position is not respected. When text nodes are trimmed from <text> it works properly. It works in Firefox and Chrome.

Similar bug https://bugs.webkit.org/show_bug.cgi?id=189790 related to how `white-space` behaves, but it's not about text nodes in particular.

I've attached an example, it contains three <text> nodes:
- text node without `white-space` property - working,
- text node with `white-space` property and text nodes in between - broken,
- text node with `white-space` property but without text nodes in between - working.

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