From 7484f087bc8770b04da4621eb25efd03cc57017b Mon Sep 17 00:00:00 2001
From: Andrew Kingston <andrew@kingston.dev>
Date: Fri, 23 Feb 2024 18:15:01 +0000
Subject: [PATCH] Add stacked drawer support and transitions

---
 packages/bbui/src/Drawer/Drawer.svelte        | 77 +++++++++++++------
 .../common/CodeEditor/CodeEditor.svelte       |  4 +
 .../src/components/common/CodeEditor/index.js |  2 -
 .../common/bindings/BindingPanel.svelte       |  2 +
 .../[screenId]/_components/AppPanel.svelte    | 10 +++
 5 files changed, 68 insertions(+), 27 deletions(-)

diff --git a/packages/bbui/src/Drawer/Drawer.svelte b/packages/bbui/src/Drawer/Drawer.svelte
index 00891c6bdc..aa35cd4c59 100644
--- a/packages/bbui/src/Drawer/Drawer.svelte
+++ b/packages/bbui/src/Drawer/Drawer.svelte
@@ -1,15 +1,16 @@
+<script context="module">
+  import { writable } from "svelte/store"
+
+  const openDrawers = writable([])
+</script>
+
 <script>
   import Portal from "svelte-portal"
   import Button from "../Button/Button.svelte"
-  import Body from "../Typography/Body.svelte"
-  import Heading from "../Typography/Heading.svelte"
-  import { setContext, createEventDispatcher } from "svelte"
+  import { setContext, createEventDispatcher, onDestroy } from "svelte"
   import { generate } from "shortid"
 
   export let title
-  export let fillWidth
-  export let left = "314px"
-  export let width = "calc(100% - 648px)"
   export let headless = false
 
   const dispatch = createEventDispatcher()
@@ -17,12 +18,15 @@
   let visible = false
   let drawerId = generate()
 
+  $: depth = $openDrawers.length - $openDrawers.indexOf(drawerId) - 1
+
   export function show() {
     if (visible) {
       return
     }
     visible = true
     dispatch("drawerShow", drawerId)
+    openDrawers.update(state => [...state, drawerId])
   }
 
   export function hide() {
@@ -31,6 +35,7 @@
     }
     visible = false
     dispatch("drawerHide", drawerId)
+    openDrawers.update(state => state.filter(id => id !== drawerId))
   }
 
   setContext("drawer-actions", {
@@ -54,22 +59,33 @@
       },
     }
   }
+
+  const getScaleFactor = depth => {
+    // Quadratic function approaching a limit of 1 as depth tends to infinity
+    const lim = 1 - 1 / (depth * depth + 1)
+    // Scale drawers between 1 and 0.9 as depth approaches infinity
+    return 1 - lim * 0.1
+  }
+
+  onDestroy(() => {
+    if (visible) {
+      hide()
+    }
+  })
 </script>
 
 {#if visible}
-  <Portal>
-    <section
-      class:fillWidth
+  <Portal target=".drawer-container">
+    <div
       class="drawer"
       class:headless
       transition:slide|local
-      style={`width: ${width}; left: ${left};`}
+      style="--scale-factor:{getScaleFactor(depth)}"
+      class:stacked={depth > 0}
     >
       {#if !headless}
         <header>
-          <div class="text">
-            {title}
-          </div>
+          <div class="text">{title}</div>
           <div class="buttons">
             <Button secondary quiet on:click={hide}>Cancel</Button>
             <slot name="buttons" />
@@ -77,30 +93,41 @@
         </header>
       {/if}
       <slot name="body" />
-    </section>
+    </div>
   </Portal>
 {/if}
 
 <style>
-  .buttons {
-    display: flex;
-    gap: var(--spacing-m);
-  }
-
   .drawer {
+    --drawer-spacing: 10px;
     position: absolute;
-    bottom: 0;
+    left: var(--drawer-spacing);
+    bottom: var(--drawer-spacing);
+    transform: translateY(calc(-210% * (1 - var(--scale-factor))))
+      scale(var(--scale-factor));
+    width: calc(100% - 2 * var(--drawer-spacing));
     background: var(--background);
     border: var(--border-light);
     z-index: 3;
     border-radius: 8px;
     overflow: hidden;
-    margin: 8px;
+    box-sizing: border-box;
+    transition: transform 360ms ease-out;
   }
-
-  .fillWidth {
-    left: 260px !important;
-    width: calc(100% - 260px) !important;
+  .drawer::after {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: var(--background);
+    pointer-events: none;
+    transition: opacity 360ms ease-out;
+    opacity: calc(10 * (1 - var(--scale-factor)));
+  }
+  .drawer.stacked::after {
+    pointer-events: all;
   }
 
   header {
diff --git a/packages/builder/src/components/common/CodeEditor/CodeEditor.svelte b/packages/builder/src/components/common/CodeEditor/CodeEditor.svelte
index 935ca98463..f00e9cd780 100644
--- a/packages/builder/src/components/common/CodeEditor/CodeEditor.svelte
+++ b/packages/builder/src/components/common/CodeEditor/CodeEditor.svelte
@@ -297,6 +297,10 @@
 </div>
 
 <style>
+  .code-editor :global(.cm-editor) {
+    background: var(--spectrum-global-color-gray-50) !important;
+  }
+
   /* Unify spacing between HBS and JS */
   .code-editor :global(.cm-content) {
     padding: 10px 0;
diff --git a/packages/builder/src/components/common/CodeEditor/index.js b/packages/builder/src/components/common/CodeEditor/index.js
index deb5f272dd..65a01f7f53 100644
--- a/packages/builder/src/components/common/CodeEditor/index.js
+++ b/packages/builder/src/components/common/CodeEditor/index.js
@@ -44,8 +44,6 @@ export const getDefaultTheme = opts => {
         border:
           "var(--spectrum-alias-border-size-thin) solid var(--spectrum-alias-border-color)",
         borderRadius: "var(--border-radius-s)",
-        backgroundColor:
-          "var( --spectrum-textfield-m-background-color, var(--spectrum-global-color-gray-50) )",
         resize: resize ? `${resize}` : "",
         overflow: "hidden",
         color: "var(--spectrum-alias-text-color)",
diff --git a/packages/builder/src/components/common/bindings/BindingPanel.svelte b/packages/builder/src/components/common/bindings/BindingPanel.svelte
index feb1a7fadf..920b9b83bd 100644
--- a/packages/builder/src/components/common/bindings/BindingPanel.svelte
+++ b/packages/builder/src/components/common/bindings/BindingPanel.svelte
@@ -25,6 +25,7 @@
   import { BindingHelpers } from "./utils"
   import formatHighlight from "json-format-highlight"
   import { capitalise } from "helpers"
+  import DrawerBindableInput from "components/common/bindings/DrawerBindableInput.svelte"
 
   const dispatch = createEventDispatcher()
 
@@ -173,6 +174,7 @@
               {capitalise(tab)}
             </ActionButton>
           {/each}
+          <DrawerBindableInput />
         </div>
         <div class="side-tabs">
           {#each sideTabs as tab}
diff --git a/packages/builder/src/pages/builder/app/[application]/design/[screenId]/_components/AppPanel.svelte b/packages/builder/src/pages/builder/app/[application]/design/[screenId]/_components/AppPanel.svelte
index 5867021386..c2988ada46 100644
--- a/packages/builder/src/pages/builder/app/[application]/design/[screenId]/_components/AppPanel.svelte
+++ b/packages/builder/src/pages/builder/app/[application]/design/[screenId]/_components/AppPanel.svelte
@@ -6,6 +6,7 @@
 </script>
 
 <div class="app-panel">
+  <div class="drawer-container" />
   <div class="header">
     <div class="header-left">
       <UndoRedoControl store={screenStore.history} />
@@ -33,6 +34,15 @@
     justify-content: flex-start;
     align-items: stretch;
     padding: 9px var(--spacing-m);
+    position: relative;
+  }
+  .drawer-container {
+    position: absolute;
+    height: 100%;
+    width: 100%;
+    overflow: hidden;
+    top: 0;
+    left: 0;
   }
   .header {
     display: flex;