1 files changed, 77 insertions, 0 deletions
diff --git a/Source/WebCore/Modules/modern-media-controls/media/seek-support.js b/Source/WebCore/Modules/modern-media-controls/media/seek-support.js
new file mode 100644
index 000000000..596f2bc80
--- /dev/null
+++ b/Source/WebCore/Modules/modern-media-controls/media/seek-support.js
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class SeekSupport extends MediaControllerSupport
+{
+
+    // Protected
+
+    get multiplier()
+    {
+        // Implemented by subclasses.
+    }
+
+    buttonPressedStateDidChange(control, isPressed)
+    {
+        if (isPressed)
+            this._startSeeking();
+        else
+            this._stopSeeking();
+    }
+
+    // Private
+
+    _startSeeking()
+    {
+        const media = this.mediaController.media;
+        const isPaused = media.paused;
+        if (isPaused)
+            media.play();
+
+        this._wasPausedWhenSeekingStarted = isPaused;
+        this._interval = window.setInterval(this._seek.bind(this), SeekSupport.SeekDelay);
+        this._seek();
+    }
+
+    _stopSeeking()
+    {
+        const media = this.mediaController.media;
+        media.playbackRate = media.defaultPlaybackRate;
+        if (this._wasPausedWhenSeekingStarted)
+            media.pause();
+        if (this._interval)
+            window.clearInterval(this._interval);
+    }
+
+    _seek()
+    {
+        const media = this.mediaController.media;
+        media.playbackRate = Math.min(SeekSupport.MaximumSeekRate, Math.abs(media.playbackRate * 2)) * this.multiplier;
+    }
+
+}
+
+SeekSupport.MaximumSeekRate = 8;
+SeekSupport.SeekDelay = 1500;