From 54cf6ad411ad25b8c7e17a6ae2cfcb0c3deec7b2 Mon Sep 17 00:00:00 2001
From: Jan Prochazka <jan.prochazka@gmail.com>
Date: Wed, 7 Apr 2021 20:51:07 +0200
Subject: [PATCH] activator

---
 .../src/jsonview/CollectionJsonView.svelte    | 22 ++------
 packages/web/src/utility/createActivator.ts   | 52 +++++++++++++++++++
 2 files changed, 56 insertions(+), 18 deletions(-)
 create mode 100644 packages/web/src/utility/createActivator.ts

diff --git a/packages/web/src/jsonview/CollectionJsonView.svelte b/packages/web/src/jsonview/CollectionJsonView.svelte
index f4510bbf..2b7c086b 100644
--- a/packages/web/src/jsonview/CollectionJsonView.svelte
+++ b/packages/web/src/jsonview/CollectionJsonView.svelte
@@ -1,7 +1,5 @@
 <script lang="ts" context="module">
-  let lastFocusedEditor = null;
-  const getCurrentEditor = () =>
-    lastFocusedEditor?.getTabId && lastFocusedEditor?.getTabId() == getActiveTabId() ? lastFocusedEditor : null;
+  const getCurrentEditor = () => getActiveComponent('CollectionJsonView');
 
   registerCommand({
     id: 'dataJson.switchToTable',
@@ -16,17 +14,15 @@
 <script lang="ts">
   import _ from 'lodash';
 
-  import { getContext, onMount } from 'svelte';
-  import { get_current_component } from 'svelte/internal';
-  import invalidateCommands from '../commands/invalidateCommands';
+  import { onMount } from 'svelte';
   import registerCommand from '../commands/registerCommand';
   import ChangeSetGrider from '../datagrid/ChangeSetGrider';
+  import createActivator, { getActiveComponent } from '../utility/createActivator';
 
   import { loadCollectionDataPage } from '../datagrid/CollectionDataGridCore.svelte';
   import LoadingInfo from '../elements/LoadingInfo.svelte';
   import Pager from '../elements/Pager.svelte';
 
-  import { getActiveTabId } from '../stores';
   import contextMenu, { getContextMenu, registerMenu } from '../utility/contextMenu';
   import CollectionJsonRow from './CollectionJsonRow.svelte';
 
@@ -39,9 +35,7 @@
   export let changeSetState;
   export let dispatchChangeSet;
 
-  const instance = get_current_component();
-  const tabVisible: any = getContext('tabVisible');
-  const tabid = getContext('tabid');
+  export const activator = createActivator('CollectionJsonView', true);
 
   let isLoading = false;
   let loadedTime = null;
@@ -62,12 +56,6 @@
     loadData();
   }
 
-  $: if ($tabVisible) lastFocusedEditor = instance;
-
-  export function getTabId() {
-    return tabid;
-  }
-
   export function switchToTable() {
     setConfig(cfg => ({
       ...cfg,
@@ -77,8 +65,6 @@
 
   onMount(() => {
     loadData();
-    if ($tabVisible) lastFocusedEditor = instance;
-    invalidateCommands();
   });
 
   registerMenu({ command: 'dataJson.switchToTable' });
diff --git a/packages/web/src/utility/createActivator.ts b/packages/web/src/utility/createActivator.ts
new file mode 100644
index 00000000..d65bd3c3
--- /dev/null
+++ b/packages/web/src/utility/createActivator.ts
@@ -0,0 +1,52 @@
+import { getContext } from 'svelte';
+import { get_current_component, onMount, setContext } from 'svelte/internal';
+import invalidateCommands from '../commands/invalidateCommands';
+
+const lastActiveDictionary = {};
+
+export default function createActivator(name, activateOnTabVisible) {
+  const instance = get_current_component();
+  const tabVisible: any = getContext('tabVisible');
+  const tabid = getContext('tabid');
+  const parentActivatorInstance = getContext('parentActivatorInstance') as any;
+  setContext('parentActivatorInstance', instance);
+  let tabVisibleValue;
+
+  onMount(() => {
+    const unsubscribeTabVisible = tabVisible.subscribe(value => {
+      tabVisibleValue = value;
+      if (activateOnTabVisible) {
+        activate();
+      }
+    });
+    invalidateCommands();
+
+    return () => {
+      unsubscribeTabVisible();
+    };
+  });
+
+  const activate = () => {
+    lastActiveDictionary[name] = instance;
+    if (parentActivatorInstance) {
+      parentActivatorInstance.activator.activate();
+    }
+  };
+
+  const getTabVisible = () => tabVisibleValue;
+
+  return {
+    activate,
+    tabid,
+    getTabVisible,
+  };
+}
+
+export function getActiveComponent(name) {
+  const current = lastActiveDictionary[name];
+  if (!current) return null;
+  if (!current.activator) return null;
+  if (!current.activator.getTabVisible) return null;
+  if (!current.activator.getTabVisible()) return null;
+  return current;
+}