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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/media_controls/media_controls_shared_helper.h"
#include <cmath>
#include "third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/fullscreen/fullscreen.h"
#include "third_party/blink/renderer/core/html/media/html_media_element.h"
#include "third_party/blink/renderer/core/html/media/html_media_element_controls_list.h"
#include "third_party/blink/renderer/core/html/media/html_video_element.h"
#include "third_party/blink/renderer/core/html/time_ranges.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
namespace {
const double kCurrentTimeBufferedDelta = 1.0;
}
namespace blink {
// |element| is the element to listen for the 'transitionend' event on.
// |callback| is the callback to call when the event is handled.
MediaControlsSharedHelpers::TransitionEventListener::TransitionEventListener(
Element* element,
Callback callback)
: callback_(callback), element_(element) {
DCHECK(callback_);
DCHECK(element_);
}
void MediaControlsSharedHelpers::TransitionEventListener::Attach() {
DCHECK(!attached_);
attached_ = true;
element_->addEventListener(event_type_names::kTransitionend, this, false);
}
void MediaControlsSharedHelpers::TransitionEventListener::Detach() {
DCHECK(attached_);
attached_ = false;
element_->removeEventListener(event_type_names::kTransitionend, this, false);
}
bool MediaControlsSharedHelpers::TransitionEventListener::IsAttached() const {
return attached_;
}
void MediaControlsSharedHelpers::TransitionEventListener::Invoke(
ExecutionContext* context,
Event* event) {
if (event->target() != element_)
return;
if (event->type() == event_type_names::kTransitionend) {
callback_.Run();
return;
}
NOTREACHED();
}
void MediaControlsSharedHelpers::TransitionEventListener::Trace(
blink::Visitor* visitor) const {
NativeEventListener::Trace(visitor);
visitor->Trace(element_);
}
std::optional<unsigned> MediaControlsSharedHelpers::GetCurrentBufferedTimeRange(
HTMLMediaElement& media_element) {
double current_time = media_element.currentTime();
double duration = media_element.duration();
TimeRanges* buffered_time_ranges = media_element.buffered();
DCHECK(buffered_time_ranges);
if (!std::isfinite(duration) || !duration || std::isnan(current_time)) {
return std::nullopt;
}
// Calculate the size of the after segment (i.e. what has been buffered).
for (unsigned i = 0; i < buffered_time_ranges->length(); ++i) {
float start = buffered_time_ranges->start(i, ASSERT_NO_EXCEPTION);
float end = buffered_time_ranges->end(i, ASSERT_NO_EXCEPTION);
// The delta is there to avoid corner cases when buffered
// ranges is out of sync with current time because of
// asynchronous media pipeline and current time caching in
// HTMLMediaElement.
// This is related to https://www.w3.org/Bugs/Public/show_bug.cgi?id=28125
// FIXME: Remove this workaround when WebMediaPlayer
// has an asynchronous pause interface.
if (!std::isnan(start) && !std::isnan(end) &&
start <= current_time + kCurrentTimeBufferedDelta &&
end > current_time) {
return i;
}
}
return std::nullopt;
}
String MediaControlsSharedHelpers::FormatTime(double time) {
if (!std::isfinite(time))
time = 0;
int seconds = static_cast<int>(fabs(time));
int minutes = seconds / 60;
int hours = minutes / 60;
seconds %= 60;
minutes %= 60;
const char* negative_sign = (time < 0 ? "-" : "");
// [0-10) minutes duration is m:ss
// [10-60) minutes duration is mm:ss
// [1-10) hours duration is h:mm:ss
// [10-100) hours duration is hh:mm:ss
// [100-1000) hours duration is hhh:mm:ss
// etc.
if (hours > 0) {
return String::Format("%s%d:%02d:%02d", negative_sign, hours, minutes,
seconds);
}
return String::Format("%s%d:%02d", negative_sign, minutes, seconds);
}
bool MediaControlsSharedHelpers::ShouldShowFullscreenButton(
const HTMLMediaElement& media_element) {
// Unconditionally allow the user to exit fullscreen if we are in it
// now. Especially on android, when we might not yet know if
// fullscreen is supported, we sometimes guess incorrectly and show
// the button earlier, and we don't want to remove it here if the
// user chose to enter fullscreen. crbug.com/500732 .
if (media_element.IsFullscreen())
return true;
if (!IsA<HTMLVideoElement>(media_element))
return false;
if (!media_element.HasVideo())
return false;
if (!Fullscreen::FullscreenEnabled(media_element.GetDocument()))
return false;
if (media_element.ControlsListInternal()->ShouldHideFullscreen() &&
!media_element.UserWantsControlsVisible()) {
UseCounter::Count(media_element.GetDocument(),
WebFeature::kHTMLMediaElementControlsListNoFullscreen);
return false;
}
return true;
}
} // namespace blink
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