feat(full-screen): add mousetrap record poc

Author: daksh2k

Extensions/full-screen/dist/fullScreen.js

@@ -21,6 +21,7 @@ import { Config, Settings } from "./types/fullscreen";
 import WebAPI from "./services/web-api";
 import showWhatsNew from "./services/whats-new";
 import { getHtmlContent } from "./services/html-creator";
+import { initMoustrapRecord } from "./services/mousetrap-record";
 
 import SeekableProgressBar from "./ui/components/ProgressBar/ProgressBar";
 import SeekableVolumeBar from "./ui/components/VolumeBar/VolumeBar";
@@ -47,6 +48,7 @@ async function main() {
 
     // Start from here
     showWhatsNew();
+    initMoustrapRecord(Spicetify.Mousetrap);
 
     if (CFM.getGlobal("activationTypes") !== "btns") {
         if (CFM.getGlobal("keyActivation") !== "def") Spicetify.Mousetrap.bind("t", openwithTV);
@@ -259,6 +261,12 @@ async function main() {
         }
     }
 
+    function recordSequence() {
+        Spicetify.Mousetrap.record(function (sequence) {
+            // sequence is an array like ['ctrl+k', 'c']
+            console.log("You pressed: " + sequence.join(" "));
+        });
+    }
     // Set the timeout to show upnext or hide when song ends
     let upnextTimer: NodeJS.Timeout,
         upNextShown = false;

Extensions/full-screen/src/app.tsx

@@ -0,0 +1,199 @@
+/**
+ * This extension allows you to record a sequence using Mousetrap.
+ *
+ * @author Dan Tao <[email protected]>
+ */
+export function initMoustrapRecord(Mousetrap) {
+    /**
+     * the sequence currently being recorded
+     *
+     * @type {Array}
+     */
+    var _recordedSequence = [],
+        /**
+         * a callback to invoke after recording a sequence
+         *
+         * @type {Function|null}
+         */
+        _recordedSequenceCallback = null,
+        /**
+         * a list of all of the keys currently held down
+         *
+         * @type {Array}
+         */
+        _currentRecordedKeys = [],
+        /**
+         * temporary state where we remember if we've already captured a
+         * character key in the current combo
+         *
+         * @type {boolean}
+         */
+        _recordedCharacterKey = false,
+        /**
+         * a handle for the timer of the current recording
+         *
+         * @type {null|number}
+         */
+        _recordTimer = null,
+        /**
+         * the original handleKey method to override when Mousetrap.record() is
+         * called
+         *
+         * @type {Function}
+         */
+        _origHandleKey = Mousetrap.prototype.handleKey;
+
+    /**
+     * handles a character key event
+     *
+     * @param {string} character
+     * @param {Array} modifiers
+     * @param {Event} e
+     * @returns void
+     */
+    function _handleKey(character, modifiers, e) {
+        var self = this;
+
+        if (!self.recording) {
+            _origHandleKey.apply(self, arguments);
+            return;
+        }
+
+        // remember this character if we're currently recording a sequence
+        if (e.type == "keydown") {
+            if (character.length === 1 && _recordedCharacterKey) {
+                _recordCurrentCombo();
+            }
+
+            for (i = 0; i < modifiers.length; ++i) {
+                _recordKey(modifiers[i]);
+            }
+            _recordKey(character);
+
+            // once a key is released, all keys that were held down at the time
+            // count as a keypress
+        } else if (e.type == "keyup" && _currentRecordedKeys.length > 0) {
+            _recordCurrentCombo();
+        }
+    }
+
+    /**
+     * marks a character key as held down while recording a sequence
+     *
+     * @param {string} key
+     * @returns void
+     */
+    function _recordKey(key) {
+        var i;
+
+        // one-off implementation of Array.indexOf, since IE6-9 don't support it
+        for (i = 0; i < _currentRecordedKeys.length; ++i) {
+            if (_currentRecordedKeys[i] === key) {
+                return;
+            }
+        }
+
+        _currentRecordedKeys.push(key);
+
+        if (key.length === 1) {
+            _recordedCharacterKey = true;
+        }
+    }
+
+    /**
+     * marks whatever key combination that's been recorded so far as finished
+     * and gets ready for the next combo
+     *
+     * @returns void
+     */
+    function _recordCurrentCombo() {
+        _recordedSequence.push(_currentRecordedKeys);
+        _currentRecordedKeys = [];
+        _recordedCharacterKey = false;
+        _restartRecordTimer();
+    }
+
+    /**
+     * ensures each combo in a sequence is in a predictable order and formats
+     * key combos to be '+'-delimited
+     *
+     * modifies the sequence in-place
+     *
+     * @param {Array} sequence
+     * @returns void
+     */
+    function _normalizeSequence(sequence) {
+        var i;
+
+        for (i = 0; i < sequence.length; ++i) {
+            sequence[i].sort(function (x, y) {
+                // modifier keys always come first, in alphabetical order
+                if (x.length > 1 && y.length === 1) {
+                    return -1;
+                } else if (x.length === 1 && y.length > 1) {
+                    return 1;
+                }
+
+                // character keys come next (list should contain no duplicates,
+                // so no need for equality check)
+                return x > y ? 1 : -1;
+            });
+
+            sequence[i] = sequence[i].join("+");
+        }
+    }
+
+    /**
+     * finishes the current recording, passes the recorded sequence to the stored
+     * callback, and sets Mousetrap.handleKey back to its original function
+     *
+     * @returns void
+     */
+    function _finishRecording() {
+        if (_recordedSequenceCallback) {
+            _normalizeSequence(_recordedSequence);
+            _recordedSequenceCallback(_recordedSequence);
+        }
+
+        // reset all recorded state
+        _recordedSequence = [];
+        _recordedSequenceCallback = null;
+        _currentRecordedKeys = [];
+    }
+
+    /**
+     * called to set a 1 second timeout on the current recording
+     *
+     * this is so after each key press in the sequence the recording will wait for
+     * 1 more second before executing the callback
+     *
+     * @returns void
+     */
+    function _restartRecordTimer() {
+        clearTimeout(_recordTimer);
+        _recordTimer = setTimeout(_finishRecording, 1000);
+    }
+
+    /**
+     * records the next sequence and passes it to a callback once it's
+     * completed
+     *
+     * @param {Function} callback
+     * @returns void
+     */
+    Mousetrap.prototype.record = function (callback) {
+        var self = this;
+        self.recording = true;
+        _recordedSequenceCallback = function () {
+            self.recording = false;
+            callback.apply(self, arguments);
+        };
+    };
+
+    Mousetrap.prototype.handleKey = function () {
+        var self = this;
+        _handleKey.apply(self, arguments);
+    };
+
+    Mousetrap.init();
+}

Extensions/full-screen/src/services/mousetrap-record.ts

@@ -782,6 +782,7 @@ declare namespace Spicetify {
 	 * so new extension should use this library instead.
 	 */
 	const Mousetrap: {
+		record(arg0: (sequence: any) => void): unknown;
         bind: (
             keys: string | string[],
             callback: (event: KeyboardEvent, combo: string) => void,