author James Teh <>
Wed, 01 Feb 2023 05:02:01 +0000
changeset 651150 dd0fdd1daa69783be36acd5c50544f3694eaa8f9
parent 618295 4a19d217b980b5903844432b7e03abff7b589f01
permissions -rw-r--r--
Bug 1813980: Check IsDoc before Parent in RemoteAccessibleBase::ApplyCrossDocOffset. r=morgan We call this function on every ancestor when calculating bounds. RemoteParent() currently requires a hash lookup, so it's more efficient to early return for !IsDoc() first. This is a micro-optimisation, but it might have some impact given that we call this on every ancestor, especially when hit testing, where we call Bounds() a lot. As a bit of drive-by cleanup, use RemoteParent() rather than calling Parent() and IsRemote/AsRemote(). Differential Revision:

<!DOCTYPE html>
  window.addEventListener("mousedown", event => {
    let data = JSON.stringify({
      type: "got-mouse-down",
      coords: {
        offsetX: event.clientX,
        offsetY: event.clientY
    window.parent.postMessage(data, "*");