[web] Add lyrics player to the webinterface

Update icons.js
Add icons in alphabetical order.
Change comment to remove reference to external website
Remove extra line feeds

Co-Authored-by: Alain Nussbaumer <alain.nussbaumer@alleluia.ch>

web-src/src/App.vue

@@ -297,15 +297,27 @@ export default {
     update_player_status() {
       webapi.player_status().then(({ data }) => {
         this.$store.commit(types.UPDATE_PLAYER_STATUS, data)
+        this.update_lyrics()
       })
     },
 
     update_queue() {
       webapi.queue().then(({ data }) => {
         this.$store.commit(types.UPDATE_QUEUE, data)
+        this.update_lyrics()
       })
     },
 
+    update_lyrics() {
+      let track = this.$store.state.queue.items.filter(
+        (e) => e.id == this.$store.state.player.item_id
+      )
+      if (track.length >= 1)
+        webapi.library_track(track[0].track_id).then(({ data }) => {
+          this.$store.commit(types.UPDATE_LYRICS, data)
+        })
+    },
+
     update_settings() {
       webapi.settings().then(({ data }) => {
         this.$store.commit(types.UPDATE_SETTINGS, data)

web-src/src/components/LyricsPane.vue

@@ -0,0 +1,193 @@
+<template>
+  <div
+    ref="lyricsWrapper"
+    class="lyrics-wrapper"
+    @touchstart="autoScroll = false"
+    @touchend="autoScroll = true"
+    @scroll.passive="startedScroll"
+    @wheel.passive="startedScroll"
+  >
+    <div class="lyrics">
+      <p
+        v-for="(item, key) in lyricsArr"
+        :key="item"
+        :class="key == lyricIndex && is_sync && 'gradient'"
+      >
+        {{ item[0] }}
+      </p>
+    </div>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'LyricsPane',
+  data() {
+    // Non reactive
+    // Used as a cache to speed up finding the lyric index in the array for the current time
+    this.lastIndex = 0
+    // Fired upon scrolling, that's disabling the auto scrolling for 5s
+    this.scrollTimer = null
+    this.lastItemId = -1
+    // Reactive
+    return {
+      scroll: {},
+      // lineHeight: 42,
+      autoScroll: true // stop scroll to element when touch
+    }
+  },
+  computed: {
+    player() {
+      return this.$store.state.player
+    },
+
+    is_sync() {
+      return this.lyricsArr.length && this.lyricsArr[0].length > 1
+    },
+
+    lyricIndex() {
+      // We have to perform a dichotomic search in the time array to find the index that's matching
+      const curTime = this.player.item_progress_ms / 1000
+      const la = this.lyricsArr
+      if (la.length && la[0].length === 1) return 0 // Bail out for non synchronized lyrics
+      if (
+        this.player.item_id != this.lastItemId ||
+        (this.lastIndex < la.length && la[this.lastIndex][1] > curTime)
+      ) {
+        // Song changed or time scrolled back, let's reset the cache
+        this.resetPosCache()
+      }
+      // Check the cached value to avoid searching the times
+      if (this.lastIndex < la.length - 1 && la[this.lastIndex + 1][1] > curTime)
+        return this.lastIndex
+      if (this.lastIndex < la.length - 2 && la[this.lastIndex + 2][1] > curTime)
+        return this.lastIndex + 1
+
+      // Not found in the next 2 items, so start dichotomic search for the best time
+      let i
+      let start = 0,
+        end = la.length - 1
+      while (start <= end) {
+        i = ((end + start) / 2) | 0
+        if (la[i][1] <= curTime && la.length > i + 1 && la[i + 1][1] > curTime)
+          break
+        if (la[i][1] < curTime) start = i + 1
+        else end = i - 1
+      }
+      return i
+    },
+    lyricDuration() {
+      // Ignore unsynchronized lyrics.
+      if (!this.lyricsArr.length || this.lyricsArr[0].length < 2) return 3600
+      // The index is 0 before the first lyric until the end of the first lyric
+      if (
+        !this.lyricIndex &&
+        this.player.item_progress_ms / 1000 < this.lyricsArr[0][1]
+      )
+        return this.lyricsArr[0][1]
+      return this.lyricIndex < this.lyricsArr.length - 1
+        ? this.lyricsArr[this.lyricIndex + 1][1] -
+            this.lyricsArr[this.lyricIndex][1]
+        : 3600
+    },
+    lyricsArr() {
+      return this.$store.getters.lyrics
+    }
+  },
+  watch: {
+    lyricIndex() {
+      // Scroll current lyric in the center of the view unless user manipulated
+      this.autoScroll && this._scrollToElement()
+      this.lastIndex = this.lyricIndex
+    }
+  },
+  methods: {
+    resetPosCache() {
+      this.lastItemId = this.player.item_id
+      this.lastIndex = 0
+    },
+    startedScroll(e) {
+      // Ugly trick to check if a scroll event comes from the user or from JS
+      if (!e.screenX || e.screenX == 0 || !e.screenY || e.screenY == 0) return // Programmatically triggered event are ignored here
+      this.autoScroll = false
+      if (this.scrollTimer) clearTimeout(this.scrollTimer)
+      let t = this
+      // Re-enable automatic scrolling after 5s
+      this.scrollTimer = setTimeout(function () {
+        t.autoScroll = true
+      }, 5000)
+    },
+
+    _scrollToElement() {
+      let scrollTouch = this.$refs.lyricsWrapper,
+        currentLyric = scrollTouch.children[0].children[this.lyricIndex],
+        offsetToCenter = scrollTouch.offsetHeight >> 1
+      if (!this.lyricsArr || !currentLyric) return
+
+      let currOff = scrollTouch.scrollTop,
+        destOff = currentLyric.offsetTop - offsetToCenter
+      // Using scrollBy ensure that scrolling will happen
+      // even if the element is visible before scrolling
+      scrollTouch.scrollBy({
+        top: destOff - currOff,
+        left: 0,
+        behavior: 'smooth'
+      })
+
+      // Then prepare the animated gradient too
+      currentLyric.style.animationDuration = this.lyricDuration + 's'
+    }
+  }
+}
+</script>
+
+<style scoped>
+.lyrics-wrapper {
+  position: absolute;
+  top: -1rem;
+  left: calc(50% - 40vw);
+  right: calc(50% - 40vw);
+  bottom: 0;
+  max-height: calc(100% - 9rem);
+  overflow: auto;
+
+  /* Glass effect */
+  background: rgba(255, 255, 255, 0.8);
+  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
+  backdrop-filter: blur(3px);
+  -webkit-backdrop-filter: blur(3px);
+  border: 1px solid rgba(0, 0, 0, 0.3);
+}
+.lyrics-wrapper .lyrics {
+  display: flex;
+  align-items: center;
+  flex-direction: column;
+}
+.lyrics-wrapper .lyrics .gradient {
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+  font-weight: bold;
+  font-size: 120%;
+  animation: slide-right 1 linear;
+  background-size: 200% 100%;
+
+  background-image: -webkit-linear-gradient(left, #080 50%, #000 50%);
+}
+
+@keyframes slide-right {
+  0% {
+    background-position: 100% 0%;
+  }
+  100% {
+    background-position: 0% 0%;
+  }
+}
+
+.lyrics-wrapper .lyrics p {
+  line-height: 3rem;
+  text-align: center;
+  font-size: 1rem;
+  color: #000;
+}
+</style>

web-src/src/components/NavbarBottom.vue

@@ -100,6 +100,7 @@
                 <player-button-repeat class="button" />
                 <player-button-shuffle class="button" />
                 <player-button-consume class="button" />
+                <player-button-lyrics class="button" />
               </div>
             </div>
           </div>
@@ -176,6 +177,7 @@
             <player-button-repeat class="button" />
             <player-button-shuffle class="button" />
             <player-button-consume class="button" />
+            <player-button-lyrics class="button" />
           </div>
         </div>
         <hr class="my-3" />
@@ -268,6 +270,7 @@ import { mdiCancel } from '@mdi/js'
 import NavbarItemLink from './NavbarItemLink.vue'
 import NavbarItemOutput from './NavbarItemOutput.vue'
 import PlayerButtonConsume from '@/components/PlayerButtonConsume.vue'
+import PlayerButtonLyrics from '@/components/PlayerButtonLyrics.vue'
 import PlayerButtonNext from '@/components/PlayerButtonNext.vue'
 import PlayerButtonPlayPause from '@/components/PlayerButtonPlayPause.vue'
 import PlayerButtonPrevious from '@/components/PlayerButtonPrevious.vue'
@@ -284,6 +287,7 @@ export default {
     NavbarItemLink,
     NavbarItemOutput,
     PlayerButtonConsume,
+    PlayerButtonLyrics,
     PlayerButtonNext,
     PlayerButtonPlayPause,
     PlayerButtonPrevious,

web-src/src/components/PlayerButtonLyrics.vue

@@ -0,0 +1,46 @@
+<template>
+  <a :class="{ 'is-active': is_active }" @click="toggle_lyrics">
+    <mdicon
+      v-if="!is_active"
+      class="icon"
+      name="script-text-outline"
+      :size="icon_size"
+      :title="$t('player.button.toggle-lyrics')"
+    />
+    <mdicon
+      v-if="is_active"
+      class="icon"
+      name="script-text-play"
+      :size="icon_size"
+      :title="$t('player.button.toggle-lyrics')"
+    />
+  </a>
+</template>
+
+<script>
+export default {
+  name: 'PlayerButtonLyrics',
+
+  props: {
+    icon_size: {
+      type: Number,
+      default: 16
+    }
+  },
+
+  computed: {
+    is_active() {
+      return this.$store.getters.lyrics_pane
+    }
+  },
+
+  methods: {
+    toggle_lyrics() {
+      this.$store.state.lyrics.lyrics_pane =
+        !this.$store.state.lyrics.lyrics_pane
+    }
+  }
+}
+</script>
+
+<style></style>

web-src/src/icons.js

@@ -45,6 +45,8 @@ import {
   mdiRepeatOnce,
   mdiRewind10,
   mdiRss,
+  mdiScriptTextOutline,
+  mdiScriptTextPlay,
   mdiServer,
   mdiShuffle,
   mdiShuffleDisabled,
@@ -107,6 +109,8 @@ export const icons = {
   mdiRewind10,
   mdiRss,
   mdiServer,
+  mdiScriptTextOutline,
+  mdiScriptTextPlay,
   mdiShuffle,
   mdiShuffleDisabled,
   mdiSkipBackward,

web-src/src/locales/de.json

@@ -578,7 +578,8 @@
       "shuffle-disabled": "Tracks in Reihenfolge wiedergeben",
       "skip-backward": "Zum vorherigen Track springen",
       "skip-forward": "Zum nächsten Track springen",
-      "stop": "Wiedergabe stoppen"
+      "stop": "Wiedergabe stoppen",
+      "toggle-lyrics": "Liedtexte anzeigen/verbergen"
     }
   },
   "setting": {

web-src/src/locales/en.json

@@ -578,7 +578,8 @@
       "shuffle-disabled": "Play tracks in order",
       "skip-backward": "Skip to previous track",
       "skip-forward": "Skip to next track",
-      "stop": "Stop"
+      "stop": "Stop",
+      "toggle-lyrics": "Toggle lyrics"
     }
   },
   "setting": {

web-src/src/locales/fr.json

@@ -578,7 +578,8 @@
       "shuffle-disabled": "Lire les pistes dans l’ordre",
       "skip-backward": "Reculer à la piste précédente",
       "skip-forward": "Avancer à la piste suivante",
-      "stop": "Arrêter la lecture"
+      "stop": "Arrêter la lecture",
+      "toggle-lyrics": "Voir/Cacher les paroles"
     }
   },
   "setting": {

web-src/src/locales/zh.json

@@ -578,7 +578,8 @@
       "shuffle-disabled": "按顺序播放曲目",
       "skip-backward": "播放上一首",
       "skip-forward": "播放下一首",
-      "stop": "停止"
+      "stop": "停止",
+      "toggle-lyrics": "显示/隐藏歌词"
     }
   },
   "setting": {

web-src/src/pages/PageNowPlaying.vue

@@ -9,6 +9,7 @@
           class="is-clickable fd-has-shadow fd-cover-big-image"
           @click="open_dialog(track)"
         />
+        <lyrics-pane v-if="lyrics_visible" />
         <control-slider
           v-model:value="track_progress"
           class="mt-5"
@@ -56,6 +57,7 @@
 import * as types from '@/store/mutation_types'
 import ControlSlider from '@/components/ControlSlider.vue'
 import CoverArtwork from '@/components/CoverArtwork.vue'
+import LyricsPane from '@/components/LyricsPane.vue'
 import { mdiCancel } from '@mdi/js'
 import ModalDialogQueueItem from '@/components/ModalDialogQueueItem.vue'
 import webapi from '@/webapi'
@@ -67,6 +69,7 @@ export default {
   components: {
     ControlSlider,
     CoverArtwork,
+    LyricsPane,
     ModalDialogQueueItem
   },
 
@@ -86,13 +89,8 @@ export default {
       return this.track.length_ms === 0
     },
 
-    track_progress: {
-      get() {
-        return Math.floor(this.player.item_progress_ms / INTERVAL)
-      },
-      set(value) {
-        this.player.item_progress_ms = value * INTERVAL
-      }
+    lyrics_visible() {
+      return this.$store.getters.lyrics_pane
     },
 
     player() {
@@ -103,6 +101,15 @@ export default {
       return this.$store.getters.now_playing
     },
 
+    track_progress: {
+      get() {
+        return Math.floor(this.player.item_progress_ms / INTERVAL)
+      },
+      set(value) {
+        this.player.item_progress_ms = value * INTERVAL
+      }
+    },
+
     track_progress_max() {
       return this.is_live ? 1 : Math.floor(this.track.length_ms / INTERVAL)
     },

web-src/src/store/index.js

@@ -33,6 +33,12 @@ export default createStore({
         item_length_ms: 0,
         item_progress_ms: 0
       },
+      lyrics: {
+        found: false,
+        lyrics_id: -1,
+        lyrics_pane: false,
+        lyrics: []
+      },
       queue: {
         version: 0,
         count: 0,
@@ -70,6 +76,18 @@ export default createStore({
   },
 
   getters: {
+    lyrics: (state) => {
+      return state.lyrics.lyrics
+    },
+
+    lyrics_found: (state) => {
+      return state.lyrics.found
+    },
+
+    lyrics_pane: (state) => {
+      return state.lyrics.lyrics_pane
+    },
+
     now_playing: (state) => {
       const item = state.queue.items.find(function (item) {
         return item.id === state.player.item_id
@@ -188,6 +206,28 @@ export default createStore({
     [types.UPDATE_QUEUE](state, queue) {
       state.queue = queue
     },
+    [types.UPDATE_LYRICS](state, lyrics) {
+      // Parse from .LRC or text format to synchronized lyrics
+      function parse(lyrics) {
+        let lyricsObj = []
+        let tempArr = lyrics.split('\n')
+        const regex = /(\[(\d+):(\d+)(?:\.\d+)?\] ?)?(.*)/
+
+        tempArr.forEach((item) => {
+          let matches = regex.exec(item)
+          if (matches !== null && matches[4].length) {
+            let obj = [matches[4]]
+            if (matches[2] != null && matches[3] != null)
+              obj.push(parseInt(matches[2], 10) * 60 + parseInt(matches[3], 10))
+            lyricsObj.push(obj)
+          }
+        })
+        return lyricsObj
+      }
+      state.lyrics.lyrics = 'lyrics' in lyrics ? parse(lyrics.lyrics) : ''
+      if (!state.lyrics.found)
+        state.lyrics.found = state.lyrics.lyrics.length > 0
+    },
     [types.UPDATE_LASTFM](state, lastfm) {
       state.lastfm = lastfm
     },

web-src/src/store/mutation_types.js

@@ -8,6 +8,7 @@ export const UPDATE_LIBRARY_RSS_COUNT = 'UPDATE_LIBRARY_RSS_COUNT'
 export const UPDATE_OUTPUTS = 'UPDATE_OUTPUTS'
 export const UPDATE_PLAYER_STATUS = 'UPDATE_PLAYER_STATUS'
 export const UPDATE_QUEUE = 'UPDATE_QUEUE'
+export const UPDATE_LYRICS = 'UPDATE_LYRICS'
 export const UPDATE_LASTFM = 'UPDATE_LASTFM'
 export const UPDATE_SPOTIFY = 'UPDATE_SPOTIFY'
 export const UPDATE_PAIRING = 'UPDATE_PAIRING'