feat: basic sortable list, missing auto-scroll

web/src/components/QueueViewer.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+    import SortableList from './SortableList.vue';
     import {
         beautifyTime
     } from '@/ts/util/time';
@@ -32,7 +33,7 @@
             </button>
         </div>
         <div>
-            <div v-for="(song, index) in queue" :key="index">
+            <SortableList v-slot="{ item: song, index }" v-model="queue">
                 <div class="song-cover-wrapper">
                     <img
                         v-if="song.cover"
@@ -58,9 +59,8 @@
                 <div>
                     <i class="fa-solid fa-trash-can"></i>
                     <i class="fa-solid fa-pen-to-square"></i>
-                    <i class="fa-solid fa-grip-vertical"></i>
                 </div>
-            </div>
+            </SortableList>
         </div>
     </div>
 </template>

web/src/components/SortableList.vue

@@ -1,14 +1,123 @@
-<script setup lang="ts">
-    const queue = defineModel<unknown[]>();
+<script setup lang="ts" generic="T">
+    import {
+        ref,
+        useTemplateRef
+    } from 'vue';
+
+    const queue = defineModel<T[]>( {
+        'required': true
+    } );
+
+    defineSlots<{
+        default( props: {
+            'item': T,
+            'index': number
+        } ): void
+    }>();
+
+    const emit = defineEmits<{
+        ( e: 'dropped' ): void
+    }>();
+    const scrollContainer = useTemplateRef( 'scroll-container' );
+    const movingIdx = ref( -1 );
+    const movingCurrentIdx = ref( -1 );
+    const movableSize = ref( -1 );
+    const offset = ref( -1 );
+
+    let mover = -1;
+    let moveSpeed = 0;
+
+    const start = ( ev: MouseEvent, idx: number ) => {
+        movableSize.value = document.getElementById( 'movable-' + idx )!.scrollHeight;
+        offset.value = ev.y - ( movableSize.value / 2 );
+        movingIdx.value = idx;
+        movingCurrentIdx.value = idx;
+    };
+
+    const move = ( ev: MouseEvent ) => {
+        if ( movingIdx.value < 0 ) return;
+
+        offset.value = ev.y - ( movableSize.value / 2 );
+        const relToContainer = ev.y - scrollContainer.value!.offsetTop;
+        // const height = scrollContainer.value!.offsetHeight;
+        //
+        // // Scrolling up and down
+        // if ( relToContainer < 50 ) {
+        //     moveSpeed = Math.ceil( Math.min( 10 / relToContainer, 10 ) );
+        //     startTracker();
+        // } else if ( relToContainer > height - 50 ) {
+        //     moveSpeed = Math.ceil( Math.min( 10 / ( height - relToContainer ), 10 ) );
+        //     startTracker();
+        // } else {
+        //     if ( mover >= 0 ) {
+        //         try {
+        //             clearInterval( mover );
+        //         } catch { /* empty */ }
+        //     }
+        // }
+        // Determine current index to insert
+        const percentage = ( relToContainer - scrollContainer.value!.scrollTop ) / scrollContainer.value!.scrollHeight;
+        const newIdx = Math.min( Math.max( Math.floor( percentage * queue.value.length ), 0 ), queue.value.length - 1 );
+
+        if ( newIdx !== movingIdx.value )
+            movingCurrentIdx.value = newIdx;
+        else
+            movingCurrentIdx.value = movingIdx.value;
+    };
+
+    const startTracker = () => {
+        if ( mover < 0 ) {
+            mover = setInterval( () => {
+                scrollContainer.value!.scrollTop += moveSpeed;
+            }, 100 );
+        }
+    };
+
+    const end = () => {
+        offset.value = -1;
+        movingIdx.value = -1;
+
+        // TODO: Actually do the move
+        try {
+            clearInterval( mover );
+        } catch { /* empty */ }
+
+        emit( 'dropped' );
+    };
 </script>
 
 <template>
-    <div>
-        <div v-for="(song, index) in queue" :key="index">
-            <slot :item="song"></slot>
-            <div>
-                <i class="fa-solid fa-grip-vertical"></i>
-            </div>
+    <div ref="scroll-container" class="sortable-list">
+        <div
+            v-if="movingIdx >= 0"
+            class="grip-target"
+            @mousemove="move"
+            @mouseleave="end"
+            @mouseup="end"
+        >
+        </div>
+        <div
+            v-for="(item, index) in queue"
+            :id="'movable-' + index"
+            :key="index"
+            :class="[ 'movable', movingIdx === index ? 'moving' : undefined ]"
+            :style="
+                movingIdx >= 0
+                    && ((movingCurrentIdx === index && movingIdx !== index)
+                        || (movingCurrentIdx === index - 1 && index - 1 === movingIdx)
+                    )
+                    ? `margin-top: ${ movableSize }px;`
+                    : (movingIdx === index
+                        ? `top: ${offset}px;`
+                        : ''
+                    )"
+        >
+            <slot :item="item" :index="index"></slot>
+            <i class="fa-solid fa-grip-vertical" @mousedown="( e ) => start( e, index )"></i>
         </div>
     </div>
 </template>
+
+<style lang="scss" scoped>
+    @import '@/scss/components/sortablelist.scss'
+</style>

web/src/scss/components/sortablelist.scss

@@ -0,0 +1,25 @@
+.sortable-list {
+  overflow-y: scroll;
+  overflow-x: hidden;
+  height: 100%;
+  position: relative;
+
+  >.grip-target {
+    width: 100vw;
+    height: 100vh;
+    position: fixed;
+    top: 0;
+    left: 0;
+    cursor: grabbing;
+  }
+
+  >.movable {
+    &.moving {
+      position: fixed;
+    }
+
+    >i {
+      cursor: move;
+    }
+  }
+}

web/src/views/StartPage.vue

@@ -1,5 +1,36 @@
+<script setup lang="ts">
+    import SortableList from '@/components/SortableList.vue';
+    import {
+        ref
+    } from 'vue';
+
+    const items = ref( [
+        'test',
+        'test2',
+        'test3',
+        'test4',
+        'test5',
+        'test6',
+        'test7',
+        'test8',
+        'test9',
+        'test10'
+    ] );
+</script>
+
 <template>
     <div>
         <h1>MusicPlayer</h1>
+        <div class="test">
+            <SortableList v-slot="{ item, index }" v-model="items">
+                {{ item }} at {{ index }}
+            </SortableList>
+        </div>
     </div>
 </template>
+
+<style lang="scss" scoped>
+.test {
+    height: 150px;
+}
+</style>