Allow cancelling rAF callbacks from within rAF #1005
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Manishearth
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toji
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Apr 21, 2020
index.bs
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| @@ -879,7 +879,7 @@ The <dfn method for="XRSession">cancelAnimationFrame(|handle|)</dfn> method canc | |||
| When this method is invoked, the user agent MUST run the following steps: | |||
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| 1. Let |session| be the target {{XRSession}} object. | |||
| 1. Find the entry in |session|'s [=list of animation frame callbacks=] that is associated with the value |handle|. | |||
| 1. Find the entry in |session|'s [=list of animation frame callbacks=] and |session|'s [=list of currently running animation frame callbacks=] that is associated with the value |handle|. | |||
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Nit: This could be an "or", since the value should not exist in both at once.
index.bs
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| @@ -892,15 +892,16 @@ When an {{XRSession}} |session| receives updated [=viewer=] state for timestamp | |||
| 1. If |session|'s [=pending render state=] is not <code>null</code>, [=apply the pending render state=]. | |||
| 1. If |session|'s {{XRSession/renderState}}'s {{XRRenderState/baseLayer}} is <code>null</code>, abort these steps. | |||
| 1. If |session|'s [=XRSession/mode=] is {{XRSessionMode/"inline"}} and |session|'s {{XRSession/renderState}}'s [=XRRenderState/output canvas=] is <code>null</code>, abort these steps. | |||
| 1. Let |callbacks| be a list of the entries in |session|'s [=list of animation frame callback=], in the order in which they were added to the list. | |||
| 1. Set |session|'s [=list of currently running animation frame callbacks=] to be a copy of the list of the entries in |session|'s [=list of animation frame callbacks=], in the order in which they were added to the list. | |||
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What's the reasoning behind the new copy here? We should be able to just move the pointer around, so to speak, right?
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Trying to preserve the clause that that list is in order of append, but really that's how lists work anyway so i don't think this is necessary.
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toji
approved these changes
Apr 21, 2020
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Fixes #923
r? @toji