From eea54c306d1d7ff0377b1c9dd080c4f10ce2e1ce Mon Sep 17 00:00:00 2001
From: adroslice <adriel.m.slice@gmail.com>
Date: Mon, 27 Mar 2023 21:18:28 +0200
Subject: [PATCH] WIP Multiselect

---
 client/src/components/inputs/Multiselect.vue | 148 +++++++++++++++++++
 client/src/global-styles/components.css      |   3 +-
 client/src/global-styles/mlfe.css            |   1 +
 client/src/global-styles/transitions.css     |   7 +
 client/src/pages/index.vue                   |   4 +-
 5 files changed, 161 insertions(+), 2 deletions(-)
 create mode 100644 client/src/components/inputs/Multiselect.vue

diff --git a/client/src/components/inputs/Multiselect.vue b/client/src/components/inputs/Multiselect.vue
new file mode 100644
index 0000000..5e7aca7
--- /dev/null
+++ b/client/src/components/inputs/Multiselect.vue
@@ -0,0 +1,148 @@
+<script setup lang="ts">
+const props = defineModel<{
+  options?: Record<any, any>,
+  selection?: any[],
+  search?: string,
+}>();
+let {options, selection, search} = $(props);
+
+options ??= {
+  bt1: "Boring Test Data 1",
+  bt2: "Boring Test Data 2",
+  bt3: "Boring Test Data 3",
+  bt4: "Boring Test Data 4",
+  bt5: "Boring Test Data 5",
+  bt6: "Boring Test Data 6",
+};
+selection ??= ["bt1"];
+search ??= "";
+
+let open = $ref(false);
+let navigated = $ref(0);
+let input: HTMLElement | null = $ref(null);
+
+const selected = $computed(() => selection?.length || 0);
+
+function toggle(key: any) {
+  if (selection?.includes(key)) selection?.splice(selection?.indexOf(key), 1);
+  else selection?.push(key);
+  input?.focus();
+}
+
+function onInputKeydown(e: KeyboardEvent) {
+  switch (e.key) {
+  case "Backspace":
+  case "Delete":
+    if (!selection || search !== "") break;
+    if (navigated === 0) selection?.pop();
+    else if (navigated > 0) navigated = 0;
+    else {
+      selection?.splice(navigated, 1);
+      navigated = 0;
+    }
+    selection = selection;
+    break;
+  case "ArrowUp":
+    navigated--;
+    if (-navigated > selected) navigated = 0;
+    break;
+  case "ArrowDown":
+    navigated++;
+    if (navigated > Object.entries(options || {}).length) navigated = 0;
+    break;
+  case "Enter":
+    if (!open) open = true;
+    else if (navigated > 0)
+      toggle(Object.entries(options || {})[navigated-1][0]);
+    break;
+  case "Escape":
+    if (navigated !== 0) navigated = 0;
+    else open = false;
+    break;
+  default: break;
+  }
+}
+</script>
+<template>
+  <div :class="{'multiselect': 1, 'cl-secondary': 1, open}"
+       @focusout="$event => open = ($event.currentTarget as HTMLElement).contains(($event.relatedTarget as HTMLElement))">
+    <div class="head">
+      <div class="selection">
+        <div v-for="(key, index) of selection" :key="key" v-text="(options || {})[key]" @click="() => toggle(key)" :class="{navigated: selected + navigated === index}"/>
+      </div>
+      <div class="searchbar" @focusin="() => open = true">
+        <button class="expand" @click="() => ($refs.input as any).focus()">
+          <i-material-symbols-expand-circle-down-outline/>
+        </button>
+        <input placeholder="Search..." v-model="search" ref="input" @keydown="onInputKeydown"/>
+      </div>
+    </div>
+    <Transition name="fade-fast">
+      <div class="dropdown" v-if="open" tabindex="-1" @focusin="() => open = true">
+        <div v-for="([key, option], index) in Object.entries(options || {})" :key="key" @click="() => toggle(key)" :class="{selected: selection?.includes(key), navigated: navigated === index + 1}">
+          <i-material-symbols-check-box-outline v-if="selection?.includes(key)"/>
+          <i-material-symbols-check-box-outline-blank v-else/>
+          <div v-text="option"/>
+        </div>
+      </div>
+    </Transition>
+  </div>
+</template>
+<style scoped>
+* { border: none; }
+.selection, .searchbar, .dropdown {
+  border: 1px solid var(--cl-fg);
+}
+.selection { border-bottom: none; }
+.dropdown { border-top: none; }
+
+.selection, .dropdown {
+  flex-grow: 1;
+  padding: 0.5rem;
+  background-color: var(--cl-bg);
+}
+
+.selection {
+  gap: 0.5rem;
+}
+
+.selection > div {
+  background-color: var(--cl-bg-el);
+}
+
+:is(.selection, .dropdown) > div {
+  flex-flow: row nowrap;
+  gap: 0.5rem;
+  cursor: pointer;
+  padding: 0.25rem;
+}
+:is(.selection, .dropdown) > div > div {
+  justify-content: center;
+}
+:is(.selection, .dropdown) > div.selected {
+  background-color: var(--cl-bg-sl);
+}
+:is(.selection, .dropdown) > div:hover,
+:is(.selection, .dropdown) > div.navigated {
+  background-color: var(--cl-bg-hl);
+}
+
+.searchbar {
+  flex-flow: row nowrap;
+}
+
+.searchbar > input {
+  flex-grow: 1;
+}
+
+input {
+  padding: 0.5rem;
+}
+
+.expand > svg { transition: all 0.2s ease-out; }
+.open .expand > svg { transform: rotate(180deg); }
+
+div:empty {
+  display: none;
+}
+</style>
\ No newline at end of file
diff --git a/client/src/global-styles/components.css b/client/src/global-styles/components.css
index 79e3784..61304f4 100644
--- a/client/src/global-styles/components.css
+++ b/client/src/global-styles/components.css
@@ -67,7 +67,8 @@ button, .button {
 .nav-body .button {
   background-color: var(--cl-bg);
 }
-.button:hover, button:hover {
+.button:hover, button:hover,
+.button:focus, button:focus {
   background-color: var(--cl-bg-hl);
 }
 
diff --git a/client/src/global-styles/mlfe.css b/client/src/global-styles/mlfe.css
index 079a263..cefc80c 100644
--- a/client/src/global-styles/mlfe.css
+++ b/client/src/global-styles/mlfe.css
@@ -12,6 +12,7 @@
   user-select: inherit;
   color: inherit;
   overflow: hidden;
+  flex-shrink: 0;
 }
 
 div, ul, ol, nav {
diff --git a/client/src/global-styles/transitions.css b/client/src/global-styles/transitions.css
index 87dc1bc..dc53338 100644
--- a/client/src/global-styles/transitions.css
+++ b/client/src/global-styles/transitions.css
@@ -3,4 +3,11 @@
 }
 .fade-enter-from, .fade-leave-to {
   opacity: 0;
+}
+
+.fade-fast-enter-active, .fade-fast-leave-active { 
+  transition: all 0.1s ease-out !important;
+}
+.fade-fast-enter-from, .fade-fast-leave-to {
+  opacity: 0;
 }
\ No newline at end of file
diff --git a/client/src/pages/index.vue b/client/src/pages/index.vue
index 53e0718..a97886d 100644
--- a/client/src/pages/index.vue
+++ b/client/src/pages/index.vue
@@ -13,7 +13,7 @@ let options = $ref([{name: 'Accept'}, {name: 'Drop'}, {name: 'Continue'}]);
 </script>
 
 <template>
-  <div>
+  <div style="overflow-y: auto;">
     <PageHeader title="Dashboard">
       <button @click="doShit">Example Buttons</button>
     </PageHeader>
@@ -29,6 +29,8 @@ let options = $ref([{name: 'Accept'}, {name: 'Drop'}, {name: 'Continue'}]);
       <pillbar :options="options" name="verdict" ></pillbar>
       <button>Submit</button>
     </form>
+    <Multiselect/>
+    asd
   </div>
 </template>