Centralize keyboard shortcuts (#1175)

This also adds two new keyboard shortcuts:
Save project hex: (Windows) Ctrl+Shift+S; (Mac) Cmd+Shift+S
Send to micro:bit: (Windows) Ctrl+Shift+E; (Mac) Cmd+Shift+E

package.json

@@ -46,6 +46,7 @@
     "mobile-drag-drop": "^2.3.0-rc.2",
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
+    "react-hotkeys-hook": "^4.5.0",
     "react-icons": "^4.8.0",
     "react-intl": "^6.2.10",
     "vite": "^5.1.5",

src/common/GenericDialog.tsx

@@ -16,6 +16,7 @@ import { ThemingProps } from "@chakra-ui/styled-system";
 import { ReactNode } from "react";
 import { FormattedMessage } from "react-intl";
 import ModalCloseButton from "./ModalCloseButton";
+import { FinalFocusRef } from "../project/project-actions";
 
 export interface GenericDialogProps {
   header?: ReactNode;
@@ -24,7 +25,7 @@ export interface GenericDialogProps {
   size?: ThemingProps<"Button">["size"];
   onClose: () => void;
   returnFocusOnClose?: boolean;
-  finalFocusRef?: React.RefObject<HTMLButtonElement>;
+  finalFocusRef?: FinalFocusRef;
 }
 
 export const GenericDialog = ({

src/common/InputDialog.tsx

@@ -16,6 +16,7 @@ import {
 import { ThemeTypings } from "@chakra-ui/styled-system";
 import { ReactNode, useCallback, useState } from "react";
 import { FormattedMessage } from "react-intl";
+import { FinalFocusRef } from "../project/project-actions";
 
 export interface InputValidationResult {
   ok: boolean;
@@ -39,7 +40,7 @@ export interface InputDialogProps<T> {
   actionLabel: string;
   size?: ThemeTypings["components"]["Modal"]["sizes"];
   validate?: (input: T) => InputValidationResult;
-  finalFocusRef?: React.RefObject<HTMLButtonElement>;
+  finalFocusRef?: FinalFocusRef;
   callback: (value: ValueOrCancelled<T>) => void;
 }
 

src/common/PostSaveDialog.tsx

@@ -8,6 +8,7 @@ import { ReactNode, useCallback } from "react";
 import { FormattedMessage } from "react-intl";
 import { GenericDialog, GenericDialogFooter } from "../common/GenericDialog";
 import { useProject } from "../project/project-hooks";
+import { FinalFocusRef } from "../project/project-actions";
 
 export const enum PostSaveChoice {
   ShowTransferHexHelp,
@@ -18,7 +19,7 @@ export const enum PostSaveChoice {
 interface PostSaveDialogProps {
   callback: (value: PostSaveChoice) => void;
   dialogNormallyHidden: boolean;
-  finalFocusRef: React.RefObject<HTMLButtonElement>;
+  finalFocusRef: FinalFocusRef;
 }
 
 export const PostSaveDialog = ({

src/common/keyboard-shortcuts.ts

@@ -0,0 +1,14 @@
+// Shortcuts are global unless noted otherwise.
+export const keyboardShortcuts = {
+  // This is scoped by keyboard focus.
+  copyCode: ["ctrl+c", "meta+c", "enter"],
+  search: ["ctrl+shift+f", "meta+shift+f"],
+  sendToMicrobit: ["ctrl+shift+e", "meta+shift+e"],
+  saveProject: ["ctrl+shift+s", "meta+shift+s"],
+};
+
+export const globalShortcutConfig = {
+  preventDefault: true,
+  enableOnContentEditable: true,
+  enableOnFormTags: true,
+};

src/documentation/api/ApiNode.tsx

@@ -41,6 +41,8 @@ import ShowMoreButton from "../common/ShowMoreButton";
 import { allowWrapAtPeriods } from "../common/wrap";
 import { useCodeDragImage } from "../documentation-hooks";
 import Highlight from "../reference/Highlight";
+import { useHotkeys } from "react-hotkeys-hook";
+import { keyboardShortcuts } from "../../common/keyboard-shortcuts";
 
 const kindToFontSize: Record<string, any> = {
   module: "2xl",
@@ -422,20 +424,9 @@ const DraggableSignature = ({
     onCopy();
     await actions?.copyCode(code, codeWithImports, type, id);
   }, [actions, code, codeWithImports, onCopy, type, id]);
-  const isMac = /Mac/.test(navigator.platform);
-  const handleKeyDown = useCallback(
-    async (e: React.KeyboardEvent<HTMLDivElement>) => {
-      if (e.key === "Enter") {
-        e.preventDefault();
-        handleCopyCode();
-      }
-      if ((e.key === "c" || e.key === "C") && (isMac ? e.metaKey : e.ctrlKey)) {
-        e.preventDefault();
-        handleCopyCode();
-      }
-    },
-    [handleCopyCode, isMac]
-  );
+  const hotKeysRef = useHotkeys(keyboardShortcuts.copyCode, handleCopyCode, {
+    preventDefault: true,
+  });
   const intl = useIntl();
   const [{ dragDropSuccess }] = useSessionSettings();
   return (
@@ -448,6 +439,7 @@ const DraggableSignature = ({
         isDisabled={dragDropSuccess}
       >
         <HStack
+          ref={hotKeysRef}
           draggable
           spacing={0}
           onClick={copyCodeButton.onToggle}
@@ -467,7 +459,6 @@ const DraggableSignature = ({
             boxShadow: "var(--chakra-shadows-outline);",
             outline: "none",
           }}
-          onKeyDown={handleKeyDown}
           {...props}
           cursor="grab"
         >

src/documentation/common/CodeEmbed.tsx

@@ -13,6 +13,7 @@ import {
 } from "@chakra-ui/react";
 import { forwardRef } from "@chakra-ui/system";
 import React, {
+  LegacyRef,
   Ref,
   useCallback,
   useEffect,
@@ -33,6 +34,8 @@ import { useSessionSettings } from "../../settings/session-settings";
 import DragHandle from "../common/DragHandle";
 import { useCodeDragImage } from "../documentation-hooks";
 import CodeActionButton from "./CodeActionButton";
+import { useHotkeys } from "react-hotkeys-hook";
+import { keyboardShortcuts } from "../../common/keyboard-shortcuts";
 
 interface CodeEmbedProps {
   code: string;
@@ -132,20 +135,9 @@ const CodeEmbed = ({
   const textHeight = lineCount * 1.375 + "em";
   const codeHeight = `calc(${textHeight} + var(--chakra-space-2) + var(--chakra-space-2))`;
   const codePopUpHeight = `calc(${codeHeight} + 2px)`; // Account for border.
-  const isMac = /Mac/.test(navigator.platform);
-  const handleKeyDown = useCallback(
-    async (e: React.KeyboardEvent<HTMLDivElement>) => {
-      if (e.key === "Enter") {
-        e.preventDefault();
-        handleCopyCode();
-      }
-      if ((e.key === "c" || e.key === "C") && (isMac ? e.metaKey : e.ctrlKey)) {
-        e.preventDefault();
-        handleCopyCode();
-      }
-    },
-    [handleCopyCode, isMac]
-  );
+  const hotKeysRef = useHotkeys(keyboardShortcuts.copyCode, handleCopyCode, {
+    preventDefault: true,
+  }) as LegacyRef<HTMLDivElement>;
   const determineBackground = () => {
     if (
       (toolkitType === "ideas" && state === "highlighted") ||
@@ -157,7 +149,7 @@ const CodeEmbed = ({
   };
   return (
     <Box position="relative">
-      <Box height={codeHeight} fontSize="md">
+      <Box height={codeHeight} fontSize="md" ref={hotKeysRef} tabIndex={-1}>
         <Code
           onMouseEnter={toRaised}
           onMouseLeave={handleMouseLeave}
@@ -180,7 +172,6 @@ const CodeEmbed = ({
           _focusVisible={{
             outline: "none",
           }}
-          onKeyDown={handleKeyDown}
           zIndex={zIndexCode}
         />
         {state === "raised" && (

src/project/SaveButton.tsx

@@ -4,13 +4,18 @@
  * SPDX-License-Identifier: MIT
  */
 import { Tooltip } from "@chakra-ui/react";
-import { useRef } from "react";
+import { useCallback, useRef } from "react";
 import { RiDownload2Line } from "react-icons/ri";
 import { useIntl } from "react-intl";
 import CollapsibleButton, {
   CollapsibleButtonProps,
 } from "../common/CollapsibleButton";
 import { useProjectActions } from "./project-hooks";
+import { useHotkeys } from "react-hotkeys-hook";
+import {
+  globalShortcutConfig,
+  keyboardShortcuts,
+} from "../common/keyboard-shortcuts";
 
 interface SaveButtonProps
   extends Omit<CollapsibleButtonProps, "onClick" | "text" | "icon"> {}
@@ -27,6 +32,12 @@ const SaveButton = (props: SaveButtonProps) => {
   const actions = useProjectActions();
   const intl = useIntl();
   const menuButtonRef = useRef<HTMLButtonElement>(null);
+  const activeElementRef = useRef<HTMLElement | null>(null);
+  const handleSave = useCallback(() => {
+    activeElementRef.current = document.activeElement as HTMLElement;
+    actions.save(activeElementRef);
+  }, [actions]);
+  useHotkeys(keyboardShortcuts.saveProject, handleSave, globalShortcutConfig);
   return (
     <Tooltip
       hasArrow

src/project/SendButton.tsx

@@ -22,6 +22,12 @@ import { ConnectionAction, ConnectionStatus } from "../device/device";
 import { useConnectionStatus } from "../device/device-hooks";
 import MoreMenuButton from "./MoreMenuButton";
 import { useProjectActions } from "./project-hooks";
+import { useHotkeys } from "react-hotkeys-hook";
+import {
+  globalShortcutConfig,
+  keyboardShortcuts,
+} from "../common/keyboard-shortcuts";
+import { FinalFocusRef } from "./project-actions";
 
 interface SendButtonProps {
   size?: ThemeTypings["components"]["Button"]["sizes"];
@@ -48,24 +54,27 @@ const SendButton = React.forwardRef(
       flashing: false,
       lastCompleteFlash: 0,
     });
-    const handleSendToMicrobit = useCallback(async () => {
-      if (flashing.current.flashing) {
-        // Ignore repeated clicks.
-        return;
-      }
-      flashing.current = {
-        flashing: true,
-        lastCompleteFlash: flashing.current.lastCompleteFlash,
-      };
-      try {
-        await actions.flash(sendButtonRef);
-      } finally {
+    const handleSendToMicrobit = useCallback(
+      async (finalFocusRef: FinalFocusRef) => {
+        if (flashing.current.flashing) {
+          // Ignore repeated clicks.
+          return;
+        }
         flashing.current = {
-          flashing: false,
-          lastCompleteFlash: new Date().getTime(),
+          flashing: true,
+          lastCompleteFlash: flashing.current.lastCompleteFlash,
         };
-      }
-    }, [flashing, actions, sendButtonRef]);
+        try {
+          await actions.flash(finalFocusRef);
+        } finally {
+          flashing.current = {
+            flashing: false,
+            lastCompleteFlash: new Date().getTime(),
+          };
+        }
+      },
+      [flashing, actions]
+    );
     const handleFocus = useCallback(
       (e: FocusEvent<unknown>) => {
         const inProgress = flashing.current.flashing;
@@ -79,6 +88,16 @@ const SendButton = React.forwardRef(
       [flashing]
     );
     const menuButtonRef = useRef<HTMLButtonElement>(null);
+    const activeElementRef = useRef<HTMLElement | null>(null);
+    const handleSendToMicrobitShortcut = useCallback(() => {
+      activeElementRef.current = document.activeElement as HTMLElement;
+      handleSendToMicrobit(activeElementRef);
+    }, [handleSendToMicrobit]);
+    useHotkeys(
+      keyboardShortcuts.sendToMicrobit,
+      handleSendToMicrobitShortcut,
+      globalShortcutConfig
+    );
     return (
       <HStack>
         <Menu>
@@ -96,7 +115,7 @@ const SendButton = React.forwardRef(
                 size={size}
                 variant="solid"
                 leftIcon={<RiUsbLine />}
-                onClick={handleSendToMicrobit}
+                onClick={() => handleSendToMicrobit(sendButtonRef)}
               >
                 <FormattedMessage id="send-action" />
               </Button>