The DOMAudioPlaybackStarted event would affect the tabbrowser's attribute,
"soundPlaying", and this attribute should indicate whether the tab is audible or not. However, in present codebase, even the tab has "soundplaying", it doens't mean
the tab has audible sound, you need to check extra attribute, "muted".
After applying this patch, tabbrowser can only own one of the attributes ("soundplaying"
or "mute"). These attributes won't exist at the same time, so we can easily know
whether the tab is audible by checking "soundPlaying".
Let's see an example,
step1. playing a playing audio
- tab owns "soundPlaying"
step2. mute the tab
- tab owns "muted"
step3. stop audio
- tab owns "muted"
step4. replay the audio
- tab owns "muted"
step5. unmute the tab
- tab owns "soundPlaying"
step6. stop audio
- tab owns ""
MozReview-Commit-ID: EEKEbAVzsVm
The DOMAudioPlaybackStarted event would affect the tabbrowser's attribute,
"soundPlaying", and this attribute should indicate whether the tab is audible or not. However, in present codebase, even the tab has "soundplaying", it doens't mean
the tab has audible sound, you need to check extra attribute, "muted".
After applying this patch, tabbrowser can only own one of the attributes ("soundplaying"
or "mute"). These attributes won't exist at the same time, so we can easily know
whether the tab is audible by checking "soundPlaying".
Let's see an example,
step1. playing a playing audio
- tab owns "soundPlaying"
step2. mute the tab
- tab owns "muted"
step3. stop audio
- tab owns "muted"
step4. replay the audio
- tab owns "muted"
step5. unmute the tab
- tab owns "soundPlaying"
step6. stop audio
- tab owns ""
MozReview-Commit-ID: 50NorRbRIP
This is a terrible hack, asking input[type=range] in our video control
xbl binding content continue to handle mouse/touch event, even if the
event is being defaultPrevented by the content.
MozReview-Commit-ID: G1huxbS7oeq
This changes the `relatedBrowser` property which held a <xul:browser> to the
more explicit `sameProcessAsFrameLoader` which takes an nsIFrameLoader.
This clarifies the purpose of the property and also (by switching to the frame
loader) makes it easier to set in some contexts.
MozReview-Commit-ID: LnEvSP8zkto
In present design, the tab would hide the unblocking icon when receives
the audio-playback event, but it means we can't hide the icon if the media isn't
audible.
For example, we won't show the unblocking icon for audio with audio track, but
we show the icon for audio with silent audio track which can only be detected
after starting decoding.
In this case, we can't receive the audio-playback after resuming that media.
Therefore, we should dispatch the different event to notify tab UI that the
tab has already been resumed.
MozReview-Commit-ID: 3xCWQU7nVCl
In present design, the tab would hide the unblocking icon when receives
the audio-playback event, but it means we can't hide the icon if the media isn't
audible.
For example, we won't show the unblocking icon for audio with audio track, but
we show the icon for audio with silent audio track which can only be detected
after starting decoding.
In this case, we can't receive the audio-playback after resuming that media.
Therefore, we should dispatch the different event to notify tab UI that the
tab has already been resumed.
MozReview-Commit-ID: 3xCWQU7nVCl
