[Webkit-unassigned] [Bug 271074] New: [UnifiedPDF] Data detector page overlay tiles should not be repainted when there is no active highlight

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=271074

            Bug ID: 271074
           Summary: [UnifiedPDF] Data detector page overlay tiles should
                    not be repainted when there is no active highlight
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: PDF
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: a_protyasha at apple.com
                CC: a_protyasha at apple.com, thorton at apple.com,
                    webkit-bug-importer at group.apple.com

Currently, we unconditionally call PageOverlay::setNeedsDisplay() whenever we scroll the PDF plugin. This is incredibly inefficient because we're repainting all the tiles even when there is no need to repaint. Let's be more prudent and teach the data detector overlay controller to better reason about when a repaint is necessary.

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