Add neighbouring lines feature to Flipper Logs plugin

Summary:
Adding a feature to Flipper's Logs plugin where:
1) you search for something,
2) click on a line among the filtered search results,
3) press control,
4) get taken back to unfiltered list of all messages, centered on your selected line

This is to help debugging where the user may add a print statement but the error happens after it, and it's difficult to catch without a lot of scrolling.

Reviewed By: mweststrate

Differential Revision: D33446285

fbshipit-source-id: 19aa472a12de074e561dbe37b44821fc29bf5c91

desktop/flipper-plugin/src/ui/data-table/DataTableManager.tsx

@@ -40,6 +40,7 @@ type PersistedState = {
   columns: Pick<DataTableColumn, 'key' | 'width' | 'filters' | 'visible'>[];
   scrollOffset: number;
   autoScroll: boolean;
+  selectedSearchRecord: any;
 };
 
 type Action<Name extends string, Args = {}> = {type: Name} & Args;
@@ -90,7 +91,9 @@ type DataManagerActions<T> =
   | Action<'appliedInitialScroll'>
   | Action<'toggleUseRegex'>
   | Action<'toggleAutoScroll'>
-  | Action<'setAutoScroll', {autoScroll: boolean}>;
+  | Action<'setAutoScroll', {autoScroll: boolean}>
+  | Action<'clearSelectedSearchRecord'>
+  | Action<'setSelectedSearchRecord'>;
 
 type DataManagerConfig<T> = {
   dataSource: DataSource<T, T[keyof T]>;
@@ -113,6 +116,8 @@ type DataManagerState<T> = {
   searchValue: string;
   useRegex: boolean;
   autoScroll: boolean;
+  /** Used to remember the record entry to lookup when user presses ctrl */
+  selectedSearchRecord: any;
 };
 
 export type DataTableReducer<T> = Reducer<
@@ -251,6 +256,24 @@ export const dataTableManagerReducer = produce<
       draft.autoScroll = action.autoScroll;
       break;
     }
+    case 'setSelectedSearchRecord': {
+      if (draft.searchValue !== '') {
+        // Clear search to get unfiltered list of records
+        draft.searchValue = '';
+
+        // Save the record to map back in DataTable
+        draft.selectedSearchRecord = config.dataSource.view.get(
+          draft.selection.current,
+        );
+
+        draft.selection = castDraft(emptySelection);
+      }
+      break;
+    }
+    case 'clearSelectedSearchRecord': {
+      draft.selectedSearchRecord = null;
+      break;
+    }
     default: {
       throw new Error('Unknown action ' + (action as any).type);
     }
@@ -280,6 +303,8 @@ export type DataTableManager<T> = {
   sortColumn(column: keyof T, direction?: SortDirection): void;
   setSearchValue(value: string): void;
   dataSource: DataSource<T, T[keyof T]>;
+  setSelectedSearchRecord(): void;
+  clearSelectedSearchRecord(): void;
 };
 
 export function createDataTableManager<T>(
@@ -323,6 +348,12 @@ export function createDataTableManager<T>(
     setSearchValue(value) {
       dispatch({type: 'setSearchValue', value});
     },
+    setSelectedSearchRecord() {
+      dispatch({type: 'setSelectedSearchRecord'});
+    },
+    clearSelectedSearchRecord() {
+      dispatch({type: 'clearSelectedSearchRecord'});
+    },
     dataSource,
   };
 }
@@ -366,6 +397,7 @@ export function createInitialState<T>(
     searchValue: prefs?.search ?? '',
     useRegex: prefs?.useRegex ?? false,
     autoScroll: prefs?.autoScroll ?? config.autoScroll ?? false,
+    selectedSearchRecord: null,
   };
   // @ts-ignore
   res.config[immerable] = false; // optimization: never proxy anything in config
@@ -442,6 +474,7 @@ export function savePreferences(
     })),
     scrollOffset,
     autoScroll: state.autoScroll,
+    selectedSearchRecord: state.selectedSearchRecord,
   };
   localStorage.setItem(state.storageKey, JSON.stringify(prefs));
 }