graph: option to hide nodes

frontend/src/Editor.svelte

@@ -68,7 +68,7 @@
   }
 
   // autosave ;)
-  let saveTimeoutHandle: number | null = null;
+  let saveTimeoutHandle: NodeJS.Timeout | null = null;
   function autosave() {
     if (saveTimeoutHandle != null) clearTimeout(saveTimeoutHandle);
 
@@ -77,7 +77,10 @@
       await saveTasks(tasks);
     }, 5000);
   }
-  $: { tasks; autosave(); }; 
+  $: {
+    tasks;
+    autosave();
+  }
 
   function saveLocally() {
     saveToLocalDisk("tasks.json", tasksToString(tasks));
@@ -197,6 +200,20 @@
     }));
     tasks.tasks = [...tasks.tasks, ...newDescriptors];
   }
+
+  function hideSelection() {
+    for (let t of graph.getCurrentSelection()) {
+      t.hidden = true;
+    }
+    tasks = tasks;
+  }
+
+  function showSelection() {
+    for (let t of graph.getCurrentSelection()) {
+      t.hidden = false;
+    }
+    tasks = tasks;
+  }
 </script>
 
 <style>
@@ -297,7 +314,8 @@
   bind:this={graph}
   {nodeDraggingEnabled}
   on:openTask={openTaskDetailEditorButton}
-  {showHiddenEdges} />
+  {showHiddenEdges}
+  showHidden={true} />
 
 <div class="container">
   <div class="topLeftHint">
@@ -358,6 +376,10 @@
           title={isLoggedIn() ? 'Nahraje všechny úlohy z jednoho ročníku, které tu ještě nejsou' : 'Je nutné být přihlášený a na stránce v KSP template.'}>Nahrát
           celý ročník</button>
       </div>
+      <div>
+        <button on:click={hideSelection}>Skrýt výběr</button>
+        <button on:click={showSelection}>Zobrazit výběr</button>
+      </div>
     </div>
 
     <div class="taskDetails">

frontend/src/Graph.svelte

@@ -7,6 +7,7 @@
   import { createEdges } from "./tasks";
   import { taskStatuses } from "./task-status-cache";
 import { grabAssignment } from "./ksp-task-grabber";
+import TaskDetailEditor from "./TaskDetailEditor.svelte";
 
   export let tasks: TasksFile;
   export let nodeDraggingEnabled: boolean = false;
@@ -14,6 +15,7 @@ import { grabAssignment } from "./ksp-task-grabber";
   export let showHiddenEdges: boolean = false;
   export let selection: Set<TaskDescriptor> = new Set();
   export let showCenterMarker: boolean = false;
+  export let showHidden: boolean = false;
 
   let hoveredTask: null | TaskDescriptor = null;
 
@@ -185,6 +187,10 @@ import { grabAssignment } from "./ksp-task-grabber";
     window.addEventListener("mouseup", dragStop, { once: true });
   }
 
+  export function getCurrentSelection(): Set<TaskDescriptor> {
+    return selection;
+  }
+
   onMount(() => {
     setupZoom();
   });
@@ -308,10 +314,13 @@ import { grabAssignment } from "./ksp-task-grabber";
             stroke-dasharray="15,15" />
         {/if}
         {#each edges as edge}
-          <GraphEdge {edge} showLabelEdge={showHiddenEdges} />
+          {#if showHidden || !(edge?.dependee?.hidden || edge?.dependency?.hidden)}
+            <GraphEdge {edge} showLabelEdge={showHiddenEdges} />
+          {/if}
         {/each}
         {#each nodes as task}
-          <GraphNode
+          {#if showHidden || !(task.hidden ?? false) }
+            <GraphNode
             {task}
             on:mousedown={dragStart}
             selected={selectionToolEnabled && selection.has(task)}
@@ -320,6 +329,7 @@ import { grabAssignment } from "./ksp-task-grabber";
             on:hoveringChange={nodeHover(task)}
             status={$taskStatuses.get(task.id)}
             on:dblclick={nodeDoubleClick(task)} />
+          {/if}
         {/each}
         {#if hoveredTask != null && hoveredTask.type == "open-data" }
         <g class="tooltip">

frontend/src/GraphEdge.svelte

@@ -1,15 +1,29 @@
 <script lang="ts">
     import type { TaskEdge } from "./graph";
-  
+
     export let edge: TaskEdge;
     export let showLabelEdge: boolean = false;
-    
-    $: [x1, y1] = edge?.dependency?.position ?? [0,0];
+
+    $: [x1, y1] = edge?.dependency?.position ?? [0, 0];
     $: [x2, y2] = edge?.dependee?.position ?? [0, 0];
-    $: dx = x1 - x2
-    $: dy = y1 - y2
+    $: dx = x1 - x2;
+    $: dy = y1 - y2;
+
+    $: hidden =
+        (edge?.dependee?.hidden ?? false) ||
+        (edge?.dependency?.hidden ?? false);
 </script>
 
-{#if showLabelEdge || (edge?.dependee?.type ?? null) != "label"}
-    <path d="m {x2} {y2+0} c 0 0 {dx} {dy-40} {dx} {dy-20}" style="fill:none; stroke: #aaa; stroke-width: 3px" />
+<style>
+    .hidden {
+        stroke-opacity: 0.5;
+        fill-opacity: 0.5;
+    }
+</style>
+
+{#if showLabelEdge || (edge?.dependee?.type ?? null) != 'label'}
+    <path
+        d="m {x2} {y2 + 0} c 0 0 {dx} {dy - 40} {dx} {dy - 20}"
+        style="fill:none; stroke: #aaa; stroke-width: 3px"
+        class={hidden ? 'hidden' : ''} />
 {/if}

frontend/src/GraphNode.svelte

@@ -41,8 +41,7 @@
   // every time after that
   $: {
     task.title;
-    if (text_element)
-      ensureTextFits();
+    if (text_element) ensureTextFits();
   }
 
   function dblclick(e: MouseEvent) {
@@ -56,6 +55,12 @@
   g:not(.label) {
     cursor: pointer;
   }
+
+  .hidden {
+    fill-opacity: 0.5;
+    stroke-opacity: 0.5;
+  }
+
   .label {
     font-size: 1.5em;
     fill: gainsboro;
@@ -81,7 +86,8 @@
     fill: green; /* TODO */
   }
 
-  .selected > ellipse, .selected > rect {
+  .selected > ellipse,
+  .selected > rect {
     stroke-width: 4px;
     stroke: red;
   }
@@ -94,9 +100,12 @@
   on:mouseleave={leave}
   on:click={click}
   on:dblclick={dblclick}
-  class="{status == null ? '' : status.solved ? 'solved' : status.submitted ? 'submitted' : ''} {task.type} {selected ? 'selected' : 'notSelected'}">
+  class="{status == null ? '' : status.solved ? 'solved' : status.submitted ? 'submitted' : ''}
+    {task.type}
+    {selected ? 'selected' : 'notSelected'}
+    {task.hidden ?? false ? 'hidden' : ''}">
   {#if task.type == 'label'}
-    {#if selected }
+    {#if selected}
       <ellipse rx={ellipse_rx} ry={20} {cx} {cy} />
     {/if}
     <text
@@ -109,8 +118,14 @@
       {task.title == null ? task.id : task.title}
     </text>
   {:else}
-    {#if task.type == "text"}
-      <rect class="taskNode" x={cx-ellipse_rx} y={cy-20} height={40} width={2*ellipse_rx} rx={3} />
+    {#if task.type == 'text'}
+      <rect
+        class="taskNode"
+        x={cx - ellipse_rx}
+        y={cy - 20}
+        height={40}
+        width={2 * ellipse_rx}
+        rx={3} />
     {:else}
       <ellipse class="taskNode" rx={ellipse_rx} ry={20} {cx} {cy} />
     {/if}

frontend/src/tasks.ts

@@ -6,6 +6,7 @@ export type TaskDescriptor = {
     requires: string[]
     comment?: string
     position?: [number, number]
+    hidden?: boolean
 } & (
         {
             type: "open-data",