mirror of
https://github.com/streetwriters/notesnook.git
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836be5e4f4
we'll be using this later on for everything keyboard related. it is simple implementation that normalizes key codes across platforms
114 lines
4.0 KiB
TypeScript
114 lines
4.0 KiB
TypeScript
/* eslint-disable header/header */
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/*
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Copyright (C) 2015-2017 by Marijn Haverbeke <marijnh@gmail.com> and others
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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import { base, keyName } from "w3c-keyname";
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export type Command = () => boolean;
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const mac =
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typeof navigator != "undefined"
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? /Mac|iP(hone|[oa]d)/.test(navigator.platform)
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: false;
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function normalizeKeyName(name: string) {
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const parts = name.split(/-(?!$)/);
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let result = parts[parts.length - 1];
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if (result == "Space") result = " ";
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let alt, ctrl, shift, meta;
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for (let i = 0; i < parts.length - 1; i++) {
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const mod = parts[i];
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if (/^(cmd|meta|m)$/i.test(mod)) meta = true;
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else if (/^a(lt)?$/i.test(mod)) alt = true;
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else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;
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else if (/^s(hift)?$/i.test(mod)) shift = true;
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else if (/^mod$/i.test(mod)) {
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if (mac) meta = true;
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else ctrl = true;
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} else throw new Error("Unrecognized modifier name: " + mod);
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}
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if (alt) result = "Alt-" + result;
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if (ctrl) result = "Ctrl-" + result;
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if (meta) result = "Meta-" + result;
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if (shift) result = "Shift-" + result;
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return result;
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}
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function normalize(map: { [key: string]: Command }) {
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const copy: { [key: string]: Command } = Object.create(null);
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for (const prop in map) copy[normalizeKeyName(prop)] = map[prop];
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return copy;
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}
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function modifiers(name: string, event: KeyboardEvent, shift: boolean) {
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if (event.altKey) name = "Alt-" + name;
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if (event.ctrlKey) name = "Ctrl-" + name;
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if (event.metaKey) name = "Meta-" + name;
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if (shift !== false && event.shiftKey) name = "Shift-" + name;
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return name;
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}
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// Given a set of bindings (using the same format as
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// [`keymap`](#keymap.keymap)), return a [keydown
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// handler](#view.EditorProps.handleKeyDown) that handles them.
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export function keydownHandler(
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bindings: Record<string, Command>
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): (event: KeyboardEvent) => boolean {
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const map = normalize(bindings);
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return function (event) {
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const name = keyName(event),
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isChar = name.length == 1 && name != " ";
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let baseName: string;
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const direct = map[modifiers(name, event, !isChar)];
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if (direct && direct()) {
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event.preventDefault();
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return true;
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}
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if (
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isChar &&
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(event.shiftKey ||
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event.altKey ||
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event.metaKey ||
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name.charCodeAt(0) > 127) &&
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(baseName = base[event.keyCode]) &&
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baseName != name
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) {
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// Try falling back to the keyCode when there's a modifier
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// active or the character produced isn't ASCII, and our table
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// produces a different name from the the keyCode. See #668,
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// #1060
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const fromCode = map[modifiers(baseName, event, true)];
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if (fromCode && fromCode()) {
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event.preventDefault();
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return true;
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}
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} else if (isChar && event.shiftKey) {
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// Otherwise, if shift is active, also try the binding with the
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// Shift- prefix enabled. See #997
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const withShift = map[modifiers(name, event, true)];
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if (withShift && withShift()) {
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event.preventDefault();
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return true;
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}
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}
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return false;
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};
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}
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