Media Controls: move last buttons to modules/.

third_party/WebKit/Source/modules/media_controls/elements/MediaControlDownloadButtonElement.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/media_controls/elements/MediaControlDownloadButtonElement.h"
+
+#include "core/InputTypeNames.h"
+#include "core/events/Event.h"
+#include "core/frame/Settings.h"
+#include "core/html/HTMLAnchorElement.h"
+#include "core/html/HTMLMediaElement.h"
+#include "core/html/media/HTMLMediaElementControlsList.h"
+#include "core/html/media/HTMLMediaSource.h"
+#include "core/page/Page.h"
+#include "modules/media_controls/MediaControlsImpl.h"
+#include "public/platform/Platform.h"
+
+namespace blink {
+
+MediaControlDownloadButtonElement::MediaControlDownloadButtonElement(
+    MediaControlsImpl& media_controls)
+    : MediaControlInputElement(media_controls, kMediaDownloadButton) {
+  EnsureUserAgentShadowRoot();
+  setType(InputTypeNames::button);
+  SetShadowPseudoId(AtomicString("-internal-media-controls-download-button"));
+  SetIsWanted(false);
+}
+
+bool MediaControlDownloadButtonElement::ShouldDisplayDownloadButton() {
+  const KURL& url = MediaElement().currentSrc();
+
+  // Check page settings to see if download is disabled.
+  if (GetDocument().GetPage() &&
+      GetDocument().GetPage()->GetSettings().GetHideDownloadUI())
+    return false;
+
+  // URLs that lead to nowhere are ignored.
+  if (url.IsNull() || url.IsEmpty())
+    return false;
+
+  // If we have no source, we can't download.
+  if (MediaElement().getNetworkState() == HTMLMediaElement::kNetworkEmpty ||
+      MediaElement().getNetworkState() == HTMLMediaElement::kNetworkNoSource) {
+    return false;
+  }
+
+  // Local files and blobs (including MSE) should not have a download button.
+  if (url.IsLocalFile() || url.ProtocolIs("blob"))
+    return false;
+
+  // MediaStream can't be downloaded.
+  if (HTMLMediaElement::IsMediaStreamURL(url.GetString()))
+    return false;
+
+  // MediaSource can't be downloaded.
+  if (HTMLMediaSource::Lookup(url))
+    return false;
+
+  // HLS stream shouldn't have a download button.
+  if (HTMLMediaElement::IsHLSURL(url))
+    return false;
+
+  // Infinite streams don't have a clear end at which to finish the download
+  // (would require adding UI to prompt for the duration to download).
+  if (MediaElement().duration() == std::numeric_limits<double>::infinity())
+    return false;
+
+  // The attribute disables the download button.
+  if (MediaElement().ControlsListInternal()->ShouldHideDownload()) {
+    UseCounter::Count(MediaElement().GetDocument(),
+                      UseCounter::kHTMLMediaElementControlsListNoDownload);
+    return false;
+  }
+
+  return true;
+}
+
+WebLocalizedString::Name
+MediaControlDownloadButtonElement::GetOverflowStringName() {
+  return WebLocalizedString::kOverflowMenuDownload;
+}
+
+bool MediaControlDownloadButtonElement::HasOverflowButton() {
+  return true;
+}
+
+void MediaControlDownloadButtonElement::SetIsWanted(bool wanted) {
+  MediaControlElement::SetIsWanted(wanted);
+
+  if (!IsWanted())
+    return;
+
+  DCHECK(IsWanted());
+  if (!show_use_counted_) {
+    show_use_counted_ = true;
+    RecordMetrics(DownloadActionMetrics::kShown);
+  }
+}
+
+DEFINE_TRACE(MediaControlDownloadButtonElement) {
+  visitor->Trace(anchor_);
+  MediaControlInputElement::Trace(visitor);
+}
+
+void MediaControlDownloadButtonElement::DefaultEventHandler(Event* event) {
+  const KURL& url = MediaElement().currentSrc();
+  if (event->type() == EventTypeNames::click &&
+      !(url.IsNull() || url.IsEmpty())) {
+    Platform::Current()->RecordAction(
+        UserMetricsAction("Media.Controls.Download"));
+    if (!click_use_counted_) {
+      click_use_counted_ = true;
+      RecordMetrics(DownloadActionMetrics::kClicked);
+    }
+    if (!anchor_) {
+      HTMLAnchorElement* anchor = HTMLAnchorElement::Create(GetDocument());
+      anchor->setAttribute(HTMLNames::downloadAttr, "");
+      anchor_ = anchor;
+    }
+    anchor_->SetURL(url);
+    anchor_->DispatchSimulatedClick(event);
+  }
+  MediaControlInputElement::DefaultEventHandler(event);
+}
+
+void MediaControlDownloadButtonElement::RecordMetrics(
+    DownloadActionMetrics metric) {
+  DEFINE_STATIC_LOCAL(EnumerationHistogram, download_action_histogram,
+                      ("Media.Controls.Download",
+                       static_cast<int>(DownloadActionMetrics::kCount)));
+  download_action_histogram.Count(static_cast<int>(metric));
+}
+
+}  // namespace blink