feat: Public release of Sindarin (sjn) translation easter egg (#4033)

This has been secretly in our demo on appspot since April 2019, but it
was being inserted on-the-fly by our appspot code on the server-side.

Now that we are transitioning all of our infrastructure into GitHub
Actions, we're simplifying things by making this public and adding it
to the repo for the first time.

Enjoy!

https://shaka-player-demo.appspot.com/demo/#uilang=sjn

demo/demo.less

@@ -80,7 +80,16 @@ main.mdl-layout__content {
 
 html, body {
   /* Ensure everything has a consistent font. */
-  font-family: Roboto, Helvetica, Arial, sans-serif;
+  font-family: Roboto-Regular, Roboto, sans-serif, TengwarTelcontar;
+}
+
+// This font supports the Sindarin (sjn) translation.
+@font-face {
+  font-family: TengwarTelcontar;
+  // This could be served from demo/ (uncompiled) or dist (compiled).
+  src: url("../demo/TengwarTelcontar.woff2") format("woff2");
+  font-weight: normal;
+  font-style: normal;
 }
 
 /* Change the default opacity of the ripple container, to get around an iOS bug.

ui/less/containers.less

@@ -23,7 +23,7 @@
 
   /* Set the fonts for all other content. */
   * {
-    font-family: Roboto-Regular, Roboto, sans-serif;
+    font-family: Roboto-Regular, Roboto, sans-serif, TengwarTelcontar;
   }
 }
 

ui/locales/sjn-translations.yaml

@@ -0,0 +1,257 @@
+# Shaka Player Sindarin (Elvish) Translations
+# Copyright 2022 Google LLC
+# SPDX-License-Identifier: Apache-2.0
+
+# This documents the manual translation of our UI into Sindarin.
+# This file is not consumed automatically.
+
+# References:
+#  - Font: http://freetengwar.sourceforge.net/tengtelc.html
+#  - Transliteration & dictionary: https://www.tecendil.com/?mode=sindarin
+#  - Dictionary: https://www.jrrvf.com/hisweloke/sindar/
+#  - Dictionary: https://www.elfdict.com/w/run/s?include_old=1
+#  - Grammar: https://www.elvish.org/gwaith/sindarin_intro.htm
+#  - Grammar: https://eldamo.org/content/grammar-indexes/grammars-s.html
+#  - Imperative ending: -o
+#  - Thesaurus: https://www.thesaurus.com/
+
+translations:
+ - key: AD_DURATION
+   english: "Ad duration"
+   sjn-literal: "time for break for money"
+   sjn-roman: "lû an hastië an mirian"
+   sjn: "    "
+
+ - key: AD_PROGRESS
+   english: "Ad [AD_ON] of [NUM_ADS]"
+   sjn-literal: "break for money [A] / [B]"
+   sjn-roman: "hastië an mirian [A] / [B]"
+   sjn: "   [AD_ON] / [NUM_ADS]"
+
+ - key: AD_TIME
+   english: "Ad: [AD_TIME]"
+   sjn-literal: "break for money: [A]"
+   sjn-roman: "hastië an mirian: [A]"
+   sjn: "  : [AD_TIME]"
+
+ - key: AIRPLAY
+   english: "AirPlay"
+   sjn-literal: "heavens-make-play"
+   sjn-roman: "menelnortho"
+   sjn: ""
+
+ - key: AUTO_QUALITY
+   english: "Auto"
+   sjn-literal: "adapt/make fit"
+   sjn-roman: "cammo"
+   sjn: ""
+
+ - key: BACK
+   english: "Back"
+   sjn-literal: "return"
+   sjn-roman: "dan"
+   sjn: ""
+
+ - key: CAPTIONS
+   english: "Captions"
+   sjn-literal: "words written"
+   sjn-roman: "pith teithiel"
+   sjn: " "
+
+ - key: CAST
+   english: "Cast..."
+   sjn-literal: "throw"
+   sjn-roman: "hanto"
+   sjn: ""
+
+ - key: ENTER_LOOP_MODE
+   english: "Loop the current video"
+   sjn-literal: "enter repeating"
+   sjn-roman: "minno enquetië"
+   sjn: " "
+
+ - key: ENTER_PICTURE_IN_PICTURE
+   english: "Enter Picture-in-Picture"
+   sjn-literal: "enter mind-picture within mind-picture"
+   sjn-roman: "minno fanwos bir fanwos"
+   sjn: "   "
+
+ - key: EXIT_FULL_SCREEN
+   english: "Exit full screen"
+   sjn-literal: "escape mind-picture full"
+   sjn-roman: "uthro fanwos panta"
+   sjn: "  "
+
+ - key: EXIT_LOOP_MODE
+   english: "Stop looping the current video"
+   sjn-literal: "escape repeating"
+   sjn-roman: "uthro enquetië"
+   sjn: " "
+
+ - key: EXIT_PICTURE_IN_PICTURE
+   english: "Exit Picture-in-Picture"
+   sjn-literal: "escape mind-picture within mind-picture"
+   sjn-roman: "uthro fanwos bir fanwos"
+   sjn: "   "
+
+ - key: FAST_FORWARD
+   english: "Fast-forward"
+   sjn-literal: "make-run fast"
+   sjn-roman: "northo lim"
+   sjn: " "
+
+ - key: FULL_SCREEN
+   english: "Full screen"
+   sjn-literal: "mind-picture full"
+   sjn-roman: "fanwos panta"
+   sjn: " "
+
+ - key: LANGUAGE
+   english: "Language"
+   sjn-literal: "language"
+   sjn-roman: "lambë"
+   sjn: ""
+
+ - key: LIVE
+   english: "Live"
+   sjn-literal: "freshest"
+   sjn-roman: "cîrwain"
+   sjn: ""
+
+ - key: LOOP
+   english: "Loop"
+   sjn-literal: "repeat"
+   sjn-roman: "enqueto"
+   sjn: ""
+
+ - key: MORE_SETTINGS
+   english: "More settings"
+   sjn-literal: "more+choices"
+   sjn-roman: "galainc"
+   sjn: ""
+
+ - key: MULTIPLE_LANGUAGES
+   english: "Multiple languages"
+   sjn-literal: "language without count"
+   sjn-roman: "lambë arnoediad"
+   sjn: " "
+
+ - key: MUTE
+   english: "Mute"
+   sjn-literal: "silence"
+   sjn-roman: "dîn"
+   sjn: ""
+
+ - key: NOT_APPLICABLE
+   english: "Not applicable"
+   sjn-literal: "not important"
+   sjn-roman: "la bâl"
+   sjn: " "
+
+ - key: OFF
+   english: "Off"
+   sjn-literal: "nothing"
+   sjn-roman: "unt"
+   sjn: ""
+
+ - key: ON
+   english: "On"
+   sjn-literal: "active"
+   sjn-roman: "carweg"
+   sjn: ""
+
+ - key: PAUSE
+   english: "Pause"
+   sjn-literal: "tarry/wait/pause"
+   sjn-roman: "hasto"
+   sjn: ""
+
+ - key: PICTURE_IN_PICTURE
+   english: "Picture-in-picture"
+   sjn-literal: "mind-picture within mind-picture"
+   sjn-roman: "fanwos bir fanwos"
+   sjn: "  "
+
+ - key: PLAY
+   english: "Play"
+   sjn-literal: "make-run"
+   sjn-roman: "northo"
+   sjn: ""
+
+ - key: PLAYBACK_RATE
+   english: "Playback speed"
+   sjn-literal: "speed"
+   sjn-roman: "lintië"
+   sjn: ""
+
+ - key: REPLAY
+   english: "Replay"
+   sjn-literal: "make-run again"
+   sjn-roman: "adnortho"
+   sjn: ""
+
+ - key: RESOLUTION
+   english: "Resolution"
+   sjn-literal: "value/preciousness"
+   sjn-roman: "meiras"
+   sjn: ""
+
+ - key: REWIND
+   english: "Rewind"
+   sjn-literal: "make-run backwards"
+   sjn-roman: "northo abont"
+   sjn: " "
+
+ - key: SEEK
+   english: "Seek"
+   sjn-literal: "time"
+   sjn-roman: "lû"
+   sjn: ""
+
+ - key: SKIP_AD
+   english: "Skip Ad"
+   sjn-literal: "leap across break for money"
+   sjn-roman: "cabo thar hastië an mirian"
+   sjn: "    "
+
+ - key: SKIP_TO_LIVE
+   english: "Skip ahead to live"
+   sjn-literal: "leap to freshest"
+   sjn-roman: "cabo na cîrwain"
+   sjn: "  "
+
+ - key: STATISTICS
+   english: "Statistics"
+   sjn-literal: "interrogate numbers"
+   sjn-roman: "cetho neth"
+   sjn: " "
+
+ - key: SUBTITLE_FORCED
+   english: "Forced"
+   sjn-literal: "words written firm/abiding"
+   sjn-roman: "pith teithiel taug"
+   sjn: "  "
+
+ - key: UNDETERMINED_LANGUAGE
+   english: "Undetermined"
+   sjn-literal: "not known"
+   sjn-roman: "la sinnen"
+   sjn: " "
+
+ - key: UNMUTE
+   english: "Unmute"
+   sjn-literal: "noise/sound"
+   sjn-roman: "lhôn"
+   sjn: ""
+
+ - key: UNRECOGNIZED_LANGUAGE
+   english: "Unrecognized"
+   sjn-literal: "not known"
+   sjn-roman: "la sinnen"
+   sjn: " "
+
+ - key: VOLUME
+   english: "Volume"
+   sjn-literal: "loud(ness)"
+   sjn-roman: "brui"
+   sjn: ""

ui/locales/sjn.json

@@ -0,0 +1,42 @@
+{
+  "AD_DURATION": "    ",
+  "AD_PROGRESS": "   [AD_ON] / [NUM_ADS]",
+  "AD_TIME": "  : [AD_TIME]",
+  "AIRPLAY": "",
+  "AUTO_QUALITY": "",
+  "BACK": "",
+  "CAPTIONS": " ",
+  "CAST": "",
+  "ENTER_LOOP_MODE": " ",
+  "ENTER_PICTURE_IN_PICTURE": "   ",
+  "EXIT_FULL_SCREEN": "  ",
+  "EXIT_LOOP_MODE": " ",
+  "EXIT_PICTURE_IN_PICTURE": "   ",
+  "FAST_FORWARD": " ",
+  "FULL_SCREEN": " ",
+  "LANGUAGE": "",
+  "LIVE": "",
+  "LOOP": "",
+  "MORE_SETTINGS": "",
+  "MULTIPLE_LANGUAGES": " ",
+  "MUTE": "",
+  "NOT_APPLICABLE": " ",
+  "OFF": "",
+  "ON": "",
+  "PAUSE": "",
+  "PICTURE_IN_PICTURE": "  ",
+  "PLAY": "",
+  "PLAYBACK_RATE": "",
+  "REPLAY": "",
+  "RESOLUTION": "",
+  "REWIND": " ",
+  "SEEK": "",
+  "SKIP_AD": "    ",
+  "SKIP_TO_LIVE": "  ",
+  "STATISTICS": " ",
+  "SUBTITLE_FORCED": "  ",
+  "UNDETERMINED_LANGUAGE": " ",
+  "UNMUTE": "",
+  "UNRECOGNIZED_LANGUAGE": " ",
+  "VOLUME": ""
+}