[Files.app] Initial implementation of new audio player

chrome/browser/resources/file_manager/audio_player/elements/track_list.css

Index: chrome/browser/resources/file_manager/audio_player/elements/track_list.css
diff --git a/chrome/browser/resources/file_manager/audio_player/elements/track_list.css b/chrome/browser/resources/file_manager/audio_player/elements/track_list.css
new file mode 100644
index 0000000000000000000000000000000000000000..09c4fac8454c6942dd2a62051bc24e672d61bb85
--- /dev/null
+++ b/chrome/browser/resources/file_manager/audio_player/elements/track_list.css
@@ -0,0 +1,131 @@
+/* Copyright (c) 2012 The Chromium Authors. All rights reserved.

[mtomasz, 2014/01/23 08:05:09]

nit: 2014

[yoshiki, 2014/01/24 15:34:19]

Done.

+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+

[mtomasz, 2014/01/23 08:05:09]

The last track is not fully visible, if there is a scrollbar.

[yoshiki, 2014/01/24 15:34:19]

Fixed the height of bottom margin.

+:host {
+  -webkit-box-align: center;
+  -webkit-box-orient: vertical;
+  -webkit-box-pack: start;
+  background: #f5f5f5;
+  bottom: 62px;  /* Room for the controls bar. */
+  color: #3d3d3d;
+  cursor: default;
+  display: -webkit-box;
+  font-family: Open Sans, Droid Sans Fallback, sans-serif;
+  font-size: 10pt;
+  left: 0;
+  overflow-x: hidden;
+  overflow-y: auto;
+  position: absolute;
+  right: 0;
+  top: 0;
+}
+
+/* Common properties for track containers. */
+#track-list,

[mtomasz, 2014/01/23 08:05:09]

Since empty can we remove?

[yoshiki, 2014/01/24 15:34:19]

Done.

+#track-stack {
+}
+
+/* Scrollable list of tracks.
+ * Displayed in expanded mode if there is more than one track. */
+#track-list {
+
+}
+
+/* A single track container.
+ * Displayed in the compact mode or when there is only one track. */
+.track-stack {
+  height: 58px;
+}
+
+.audio-player.collapsed > #track-list,
+.audio-player.single_track > #track-list,
+.audio-player:not(.collapsed):not(.single-track) > .track-stack {
+  opacity: 0;
+  pointer-events: none;
+}
+
+/* Track item. */
+.track {
+  -webkit-box-align: center;
+  -webkit-box-orient: horizontal;
+  -webkit-box-pack: start;
+  display: -webkit-box;
+  height: 44px;
+  padding-left: 20px;

[mtomasz, 2014/01/23 08:05:09]

nit: The padding is too large comparing to specs.

[yoshiki, 2014/01/24 15:34:19]

Removed the padding in .track.data. Done.

+  width: 100%;
+}
+
+track-list:not([expanded]) > .track:not([active='true']) {
+  display: none;
+}
+
+/* In the expanded mode the selected track is highlighted. */
+.track[active='true'] {
+  background-color: rgb(66, 129, 244);
+}
+
+/* In the compact mode all tracks are in the same position, only the selected
+  is visible.*/
+.track-stack > .track {
+  position: absolute;
+  top: 0;
+}
+
+.track-stack > .track.selected {
+  z-index: 1;

[mtomasz, 2014/01/23 08:05:09]

Why z-index is needed?

[yoshiki, 2014/01/24 15:34:19]

Sorry, removed unnecessary styles.

+}
+
+/* Opacity transition is controlled differently for the text and the artwork.
+ * Text transition looks better if fade-in and fade-out go in parallel.
+ * For the artwork we start fading out the old icon only after the new one
+ * is completely opaque (otherwise when transitioning between identical icons
+ * we see some fading because the background transpires). */
+.track-stack > .track:not(.selected) .data,
+.track-stack > .track:not(.visible) .art {
+  opacity: 0;
+  transition: opacity 220ms ease-out;
+}
+
+/* Track data. */
+
+.track .data {
+  -webkit-box-flex: 1;
+  -webkit-box-orient: vertical;
+  -webkit-box-pack: center;
+  display: -webkit-box;
+  margin-left: 8px;
+  margin-right: 4px;
+}
+
+.track .data .data-title,
+.track .data .data-artist {
+  font-size: 12px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.track .data .data-title {
+  color: #343434;
+  font-weight: bold;
+}
+
+.track .data .data-artist {
+  color: #969696;
+}
+
+.track[active='true'] .data .data-title,
+.track[active='true'] .data .data-artist {
+  color: #fff;
+}
+
+/* TODO(kaznacheev): Set to 20px when the audio player is title-less. */
+.single-track .data-title {
+  padding-right: 0;
+}
+
+/* TODO(kaznacheev): Set to 50px when the audio player is title-less. */
+.collapsed:not(.single-track) .data-title {
+  padding-right: 20px;
+}