refactor(editor): rename block-std to std (#11250)

Closes: BS-2946

blocksuite/framework/std/src/event/keymap.ts

@@ -0,0 +1,127 @@
+import { IS_MAC } from '@blocksuite/global/env';
+import { BlockSuiteError, ErrorCode } from '@blocksuite/global/exceptions';
+import { base, keyName } from 'w3c-keyname';
+
+import type { UIEventHandler } from './base.js';
+
+function normalizeKeyName(name: string) {
+  const parts = name.split(/-(?!$)/);
+  let result = parts.at(-1);
+  if (result === 'Space') {
+    result = ' ';
+  }
+  let alt, ctrl, shift, meta;
+  parts.slice(0, -1).forEach(mod => {
+    if (/^(cmd|meta|m)$/i.test(mod)) {
+      meta = true;
+      return;
+    }
+    if (/^a(lt)?$/i.test(mod)) {
+      alt = true;
+      return;
+    }
+    if (/^(c|ctrl|control)$/i.test(mod)) {
+      ctrl = true;
+      return;
+    }
+    if (/^s(hift)?$/i.test(mod)) {
+      shift = true;
+      return;
+    }
+    if (/^mod$/i.test(mod)) {
+      if (IS_MAC) {
+        meta = true;
+      } else {
+        ctrl = true;
+      }
+      return;
+    }
+
+    throw new BlockSuiteError(
+      ErrorCode.EventDispatcherError,
+      'Unrecognized modifier name: ' + mod
+    );
+  });
+  if (alt) result = 'Alt-' + result;
+  if (ctrl) result = 'Ctrl-' + result;
+  if (meta) result = 'Meta-' + result;
+  if (shift) result = 'Shift-' + result;
+  return result as string;
+}
+
+function modifiers(name: string, event: KeyboardEvent, shift = true) {
+  if (event.altKey) name = 'Alt-' + name;
+  if (event.ctrlKey) name = 'Ctrl-' + name;
+  if (event.metaKey) name = 'Meta-' + name;
+  if (shift && event.shiftKey) name = 'Shift-' + name;
+  return name;
+}
+
+function normalize(map: Record<string, UIEventHandler>) {
+  const copy: Record<string, UIEventHandler> = Object.create(null);
+  for (const prop in map) copy[normalizeKeyName(prop)] = map[prop];
+  return copy;
+}
+
+export function bindKeymap(
+  bindings: Record<string, UIEventHandler>
+): UIEventHandler {
+  const map = normalize(bindings);
+  return ctx => {
+    const state = ctx.get('keyboardState');
+    const event = state.raw;
+    const name = keyName(event);
+    const direct = map[modifiers(name, event)];
+    if (direct && direct(ctx)) {
+      return true;
+    }
+    if (name.length !== 1 || name === ' ') {
+      return false;
+    }
+
+    if (event.shiftKey) {
+      const noShift = map[modifiers(name, event, false)];
+      if (noShift && noShift(ctx)) {
+        return true;
+      }
+    }
+
+    // none standard keyboard, fallback to keyCode
+    const special =
+      event.shiftKey ||
+      event.altKey ||
+      event.metaKey ||
+      name.charCodeAt(0) > 127;
+    const baseName = base[event.keyCode];
+    if (special && baseName && baseName !== name) {
+      const fromCode = map[modifiers(baseName, event)];
+      if (fromCode && fromCode(ctx)) {
+        return true;
+      }
+    }
+
+    return false;
+  };
+}
+
+// In Android, the keypress event  dose not contain
+// the information about what key is pressed. See
+// https://stackoverflow.com/a/68188679
+// https://stackoverflow.com/a/66724830
+export function androidBindKeymapPatch(
+  bindings: Record<string, UIEventHandler>
+): UIEventHandler {
+  return ctx => {
+    const event = ctx.get('defaultState').event;
+    if (!(event instanceof InputEvent)) return;
+
+    if (
+      event.inputType === 'deleteContentBackward' &&
+      'Backspace' in bindings
+    ) {
+      return bindings['Backspace'](ctx);
+    }
+
+    return false;
+  };
+}