From 37c50be4cafef1e69e0e7de7d1f796a226242ae2 Mon Sep 17 00:00:00 2001
From: Johannes Zillmann <jz@datameer.com>
Date: Sun, 28 Feb 2021 10:20:21 +0100
Subject: [PATCH] stage description tooltip

---
 core/src/Debugger.ts                          |  2 +
 ui/src/debug/DebugView.svelte                 |  1 +
 ui/src/debug/TransformerSelectionPopup.svelte | 56 +++++++++++++++----
 3 files changed, 48 insertions(+), 11 deletions(-)

diff --git a/core/src/Debugger.ts b/core/src/Debugger.ts
index 5504529..d774477 100644
--- a/core/src/Debugger.ts
+++ b/core/src/Debugger.ts
@@ -13,11 +13,13 @@ export default class Debugger {
   private transformers: ItemTransformer[];
   private stageResultCache: StageResult[];
   stageNames: string[];
+  stageDescriptions: string[];
 
   constructor(inputSchema: string[], inputItems: Item[], context: TransformContext, transformers: ItemTransformer[]) {
     this.transformers = transformers;
     this.context = context;
     this.stageNames = ['Parse Result', ...transformers.map((t) => t.name)];
+    this.stageDescriptions = ['Initial items as parsed by PDFjs', ...transformers.map((t) => t.description)];
     this.stageResultCache = [initialStage(inputSchema, inputItems)];
   }
 
diff --git a/ui/src/debug/DebugView.svelte b/ui/src/debug/DebugView.svelte
index 3291e43..0a13420 100644
--- a/ui/src/debug/DebugView.svelte
+++ b/ui/src/debug/DebugView.svelte
@@ -75,6 +75,7 @@
                     <span slot="content">
                         <TransformerSelectionPopup
                             {stageNames}
+                            stageDescriptions={debug.stageDescriptions}
                             {currentStage}
                             on:selectTransformer={(e) => (currentStage = e.detail)} />
                     </span>
diff --git a/ui/src/debug/TransformerSelectionPopup.svelte b/ui/src/debug/TransformerSelectionPopup.svelte
index c8815bb..549224d 100644
--- a/ui/src/debug/TransformerSelectionPopup.svelte
+++ b/ui/src/debug/TransformerSelectionPopup.svelte
@@ -6,6 +6,7 @@
     import type { Writable } from 'svelte/store';
 
     export let stageNames: string[];
+    export let stageDescriptions: string[];
     export let currentStage: number;
 
     const popupOpened: Writable<boolean> = getContext('popupOpened');
@@ -17,16 +18,19 @@
     }
 </script>
 
-<div class="absolute -mt-6 p-2 bg-gray-200 shadow-lg rounded-sm overflow-auto max-h-96" transition:slide>
-    {#each stageNames as stageName, idx}
-        <div
-            on:click={() => selectTransformer(idx)}
-            class="px-2 "
-            class:selected={idx == currentStage}
-            class:selectable={idx != currentStage}>
-            {stageName}
-        </div>
-    {/each}
+<div class="absolute -mt-6 " transition:slide>
+    <div class="p-2 bg-gray-200 shadow-lg rounded-sm overflow-auto max-h-96">
+        {#each stageNames as stageName, idx}
+            <div
+                on:click={() => selectTransformer(idx)}
+                class="tooltip px-2"
+                class:selected={idx == currentStage}
+                class:selectable={idx != currentStage}
+                data-text={stageDescriptions[idx]}>
+                {stageName}
+            </div>
+        {/each}
+    </div>
 </div>
 
 <style>
@@ -34,7 +38,6 @@
         @apply cursor-default;
         @apply bg-gray-300;
         @apply rounded;
-        /* @apply underline; */
     }
     .selectable {
         @apply cursor-pointer;
@@ -44,4 +47,35 @@
         @apply text-green-700;
         @apply rounded;
     }
+
+    .tooltip:before {
+        content: attr(data-text); /* here's the magic */
+        position: absolute;
+
+        transform: translateY(-2px);
+
+        /* move to right */
+        left: 100%;
+
+        /* the arrow */
+        border: 10px solid;
+        border-color: transparent transparent transparent var(--color-gray-600);
+
+        /* basic styles */
+        @apply ml-2;
+        @apply px-2;
+        @apply py-1;
+        @apply w-72;
+        @apply bg-gray-300;
+        @apply text-gray-800;
+        @apply rounded;
+        @apply shadow-sm;
+        @apply text-center;
+        @apply italic;
+
+        display: none; /* hide by default */
+    }
+    .tooltip:hover:before {
+        display: block;
+    }
 </style>