mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-04-27 06:48:49 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions9

LibWeb: Implement TimeRanges and HTMLMediaElement.seekable()

Browse source
This commit is contained in:
Psychpsyo 2025-02-14 11:22:12 +01:00 • committed by Andrew Kaster
parent 3952ff4786
commit aa243000f3
Notes: github-actions[bot] 2025-02-18 17:46:30 +00:00
5 changed files with 103 additions and 18 deletions
Libraries/LibWeb/HTML
HTMLMediaElement.cpp

57
Libraries/LibWeb/HTML/HTMLMediaElement.cpp
View file

@ -185,6 +185,18 @@ GC::Ref<TimeRanges> HTMLMediaElement::played() const
return time_ranges;
}
// https://html.spec.whatwg.org/multipage/media.html#dom-media-seekable
GC::Ref<TimeRanges> HTMLMediaElement::seekable() const
{
auto& realm = this->realm();
// The seekable attribute must return a new static normalized TimeRanges object that represents the ranges of the media resource, if any, that the
// user agent is able to seek to, at the time the attribute is evaluated.
auto time_ranges = realm.create<TimeRanges>(realm);
time_ranges->add_range(0, m_duration);
return time_ranges;
}
// https://html.spec.whatwg.org/multipage/media.html#dom-navigator-canplaytype
Bindings::CanPlayTypeResult HTMLMediaElement::can_play_type(StringView type) const
{
@ -1566,11 +1578,46 @@ void HTMLMediaElement::seek_element(double playback_position, MediaSeekMode seek
if (playback_position < 0)
playback_position = 0;
// FIXME: 8. If the (possibly now changed) new playback position is not in one of the ranges given in the seekable attribute,
// then let it be the position in one of the ranges given in the seekable attribute that is the nearest to the new
// playback position. If two positions both satisfy that constraint (i.e. the new playback position is exactly in the
// middle between two ranges in the seekable attribute) then use the position that is closest to the current playback
// position. If there are no ranges given in the seekable attribute then set the seeking IDL attribute to false and return.
// 8. If the (possibly now changed) new playback position is not in one of the ranges given in the seekable attribute,
auto time_ranges = seekable();
if (!time_ranges->in_range(playback_position)) {
// then let it be the position in one of the ranges given in the seekable attribute that is the nearest to the new
// playback position.
// If there are no ranges given in the seekable attribute then set the seeking IDL attribute to false and return.
if (time_ranges->length() == 0) {
set_seeking(false);
return;
}
double nearest_point;
Optional<double> other_nearest_point = {};
double distance = INFINITY;
for (size_t i = 0; i < time_ranges->length(); i++) {
for (double point : { MUST(time_ranges->start(i)), MUST(time_ranges->end(i)) }) {
auto point_distance = abs(playback_position - point);
if (point_distance < distance) {
nearest_point = point;
other_nearest_point = {};
distance = point_distance;
} else if (point_distance == distance) {
other_nearest_point = point;
}
}
}
// If two positions both satisfy that constraint (i.e. the new playback position is exactly in the middle between two ranges
// in the seekable attribute) then use the position that is closest to the current playback position.
if (other_nearest_point.has_value()) {
auto nearest_point_distance = abs(m_current_playback_position - nearest_point);
auto other_nearest_point_distance = abs(m_current_playback_position - other_nearest_point.value());
if (nearest_point_distance < other_nearest_point_distance) {
playback_position = nearest_point;
} else {
playback_position = other_nearest_point.value();
}
}
}
// 9. If the approximate-for-speed flag is set, adjust the new playback position to a value that will allow for playback to resume
// promptly. If new playback position before this step is before current playback position, then the adjusted new playback position