あべこべを実装する

public/src/js/parsetja.js

@@ -516,6 +516,23 @@
 				var string = line.toUpperCase().split("")
 				
 				for(let symbol of string){
+					const abekobe = localStorage.getItem("abekobe") ?? "false";
+
+					if (abekobe === "true") {
+						if (symbol === "1") {
+							symbol = "2";
+						} else if (symbol === "2") {
+							symbol = "1";
+						} else if (symbol === "3") {
+							symbol = "4";
+						} else if (symbol === "4") {
+							symbol = "3";
+						} else if (symbol === "A") {
+							symbol = "B";
+						} else if (symbol === "B") {
+							symbol - "A";
+						}
+					}
 
 					var error = false
 					switch(symbol){

public/src/js/songselect.js

@@ -250,6 +250,12 @@ class SongSelect{
 					action: "doron",
 				});
 
+				this.songs.push({
+					title: "あべこべ",
+					skin: this.songSkin.customSettings,
+					action: "abekobe",
+				});
+
 		this.songs.push({
 			title: strings.back,
 			skin: this.songSkin.back,
@@ -941,6 +947,20 @@ class SongSelect{
 								}
 								localStorage.setItem("doron", doron);
 							}, 100);
+						} else if (currentSong.action === "abekobe") {
+							this.playSound("se_don");
+							setTimeout(() => {
+								let abekobe = localStorage.getItem("abekobe") ?? "false";
+								const input = prompt("あべこべを有効にするには\"true\"を入力してね！", abekobe);
+								if (input === null) {
+									// キャンセル
+								} else if (input === "") {
+									input = "false";
+								} else {
+									abekobe = input;
+								}
+								localStorage.setItem("abekobe", abekobe);
+							}, 100);
 						}
 		}
 		this.pointer(false)

public/src/js/view.js

@@ -1708,7 +1708,7 @@
 
 		const doron = localStorage.getItem("doron") ?? "false";
 
-		if((!fade || fade < 1) && doron === "false"){
+		if((!fade || fade < 1) && doron !== "true"){
 			// Main circle
 			ctx.fillStyle = fill
 			ctx.beginPath()