UX: style & position AI helper in composer (#758)

Co-authored-by: Keegan George <kgeorge13@gmail.com>

assets/javascripts/discourse/components/ai-composer-helper-menu.gjs

@@ -162,6 +162,14 @@ export default class AiComposerHelperMenu extends Component {
     return true;
   }
 
+  get isExpanded() {
+    if (this.aiComposerHelper.menuState === this.MENU_STATES.triggers) {
+      return "";
+    }
+
+    return "is-expanded";
+  }
+
   @bind
   onKeyDown(event) {
     if (event.key === "Escape") {
@@ -306,7 +314,10 @@ export default class AiComposerHelperMenu extends Component {
   }
 
   <template>
-    <div class="ai-composer-helper-menu" {{this.documentListeners}}>
+    <div
+      class="ai-composer-helper-menu {{this.isExpanded}}"
+      {{this.documentListeners}}
+    >
       {{#if (eq this.aiComposerHelper.menuState this.MENU_STATES.triggers)}}
         <ul class="ai-composer-helper-menu__triggers">
           <li>

assets/javascripts/discourse/connectors/after-d-editor/ai-composer-helper.gjs

@@ -14,6 +14,7 @@ export default class AiComposerHelper extends Component {
     return showComposerAIHelper(outletArgs, helper, "context_menu");
   }
 
+  @service site;
   @service menu;
   @service aiComposerHelper;
   @tracked caretCoords;
@@ -31,6 +32,9 @@ export default class AiComposerHelper extends Component {
     document.addEventListener("mousedown", this.onMouseDown, { passive: true });
     document.addEventListener("mouseup", this.onMouseUp, { passive: true });
     document.addEventListener("selectionchange", this.onSelectionChanged);
+    window.visualViewport.addEventListener("resize", this.onResize, {
+      passive: true,
+    });
 
     this.dEditorInput = document.querySelector(".d-editor-input");
 
@@ -42,6 +46,7 @@ export default class AiComposerHelper extends Component {
       document.removeEventListener("mousedown", this.onMouseDown);
       document.removeEventListener("mouseup", this.onMouseUp);
       document.removeEventListener("selectionchange", this.onSelectionChanged);
+      window.visualViewport.removeEventListener("resize", this.onResize);
 
       if (this.dEditorInput) {
         this.dEditorInput.removeEventListener("scroll", this.updatePosition);
@@ -54,6 +59,18 @@ export default class AiComposerHelper extends Component {
     this.menuInstance?.close();
   }
 
+  @bind
+  onResize() {
+    if (!this.site.mobileView) {
+      return;
+    }
+
+    document.documentElement.style.setProperty(
+      "--mobile-virtual-screen-height",
+      `${window.visualViewport.height}px`
+    );
+  }
+
   @bind
   onSelectionChanged() {
     if (

assets/stylesheets/modules/ai-helper/mobile/ai-helper.scss

@@ -0,0 +1,75 @@
+:root {
+  // Overridden in ai-composer-helper.gjs to adjust for virtual keyboard
+  --mobile-virtual-screen-height: 100svh;
+}
+
+.ai-composer-helper-menu:not(.is-expanded) {
+  --composer-helper-menu-padding: 1rem;
+  --composer-helper-menu-trigger-size: 3em;
+  --composer-helper-menu-height: calc(1rem + 3em);
+
+  position: fixed;
+  list-style: none;
+  inset: auto;
+  transform: none;
+  max-width: unset;
+  z-index: z("fullscreen");
+  top: calc(
+    var(--mobile-virtual-screen-height) - var(--composer-helper-menu-height)
+  );
+  right: 0;
+  padding-right: 1rem;
+  padding-bottom: var(--composer-helper-menu-padding);
+  margin: 0px;
+  width: 100vw;
+  text-align: right;
+  border: none;
+  background: linear-gradient(
+    to bottom,
+    transparent 0,
+    rgba(0, 0, 0, 0.3) 100%
+  );
+  box-shadow: none;
+
+  &.out-of-bounds {
+    visibility: visible;
+    pointer-events: initial;
+  }
+
+  button {
+    background: var(--secondary);
+    border: 1px solid var(--primary-low);
+    border-radius: 100%;
+    box-shadow: var(--shadow-card);
+    width: var(--composer-helper-menu-trigger-size);
+    height: var(--composer-helper-menu-trigger-size);
+    animation-duration: 0.15s;
+    animation-timing-function: cubic-bezier(0, 0.7, 0.9, 1.2);
+    animation-fill-mode: backwards;
+    animation-name: slide-in;
+
+    &:hover {
+      .discourse-no-touch & {
+        background: var(--secondary);
+      }
+    }
+
+    .d-button-label {
+      display: none;
+    }
+    .d-icon {
+      margin: 0;
+    }
+  }
+}
+
+@keyframes slide-in {
+  0% {
+    opacity: 0;
+    transform: translateY(calc(100% + 1rem));
+  }
+  100% {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}

plugin.rb

@@ -14,6 +14,7 @@ gem "tiktoken_ruby", "0.0.9"
 enabled_site_setting :discourse_ai_enabled
 
 register_asset "stylesheets/modules/ai-helper/common/ai-helper.scss"
+register_asset "stylesheets/modules/ai-helper/mobile/ai-helper.scss", :mobile
 
 register_asset "stylesheets/modules/summarization/common/ai-summary.scss"
 register_asset "stylesheets/modules/summarization/desktop/ai-summary.scss", :desktop