Eliminate generated files

snapshot-src/get-snap.js

@@ -0,0 +1,122 @@
+const { app, BrowserWindow } = require("electron");
+let argDir = process.argv[2];
+let fs = require("fs");
+let cp = require("child_process");
+
+let mainWindow = null;
+let allWindowClosed = false;
+let pendingTasks = 0;
+let zoom = 2;
+
+function checkQuit() {
+	if (allWindowClosed && pendingTasks == 0) app.quit();
+}
+
+app.on("window-all-closed", function () {
+	allWindowClosed = true;
+	checkQuit();
+});
+
+function combineImages(images, outfile, width, height, doubleTrim) {
+	let command =
+		"magick " +
+		images.join(" ") +
+		" -append -crop " +
+		width +
+		"x" +
+		height +
+		"+0+0 +repage -bordercolor #008000 -fuzz 5% -trim  " +
+		(doubleTrim ? "-bordercolor " + doubleTrim + " -trim " : "") +
+		outfile;
+	console.log(command);
+	cp.exec(command, function (err, stdout, stderr) {
+		if (err) console.log(err);
+		images.forEach(function (file) {
+			fs.unlinkSync(file);
+		});
+		pendingTasks -= 1;
+		checkQuit();
+	});
+}
+
+let ipc = require("electron").ipcMain;
+function GOTO(phase) {
+	currentPhase = phase;
+}
+const phases = {
+	prepare: function (event, arg) {
+		console.log(arg);
+		GOTO(phases["receive-rect"]);
+	},
+	"receive-rect": function (event, rect) {
+		pendingTasks += 1;
+		console.log("Received rect.");
+		rect = JSON.parse(JSON.stringify(rect));
+		let file = argDir + "/" + rect.name + ".png";
+		let j = 0;
+		let totalFiles = Math.ceil(rect.height / rect.windowHeight);
+		let pendingFiles = totalFiles;
+		step();
+
+		function doneFileWrite() {
+			pendingFiles -= 1;
+			if (pendingFiles <= 0) {
+				let images = [];
+				for (let k = 0; k < j; k++) {
+					images.push(argDir + "/" + rect.name + "." + k + ".png");
+				}
+				combineImages(
+					images,
+					file,
+					rect.windowWidth * rect.dpi,
+					rect.height * rect.dpi,
+					rect.doubleTrim
+				);
+			}
+		}
+		function step() {
+			event.sender.send("scroll", rect.y + j * rect.windowHeight);
+			GOTO(function (event) {
+				mainWindow.capturePage().then(function (image) {
+					fs.writeFile(
+						argDir + "/" + rect.name + "." + j + ".png",
+						image.toPNG(),
+						doneFileWrite
+					);
+					j += 1;
+					if (j >= totalFiles) {
+						// Move to next image
+						event.sender.send("complete", file);
+						GOTO(phases["receive-rect"]);
+					} else {
+						step();
+					}
+				});
+			});
+		}
+	}
+};
+let currentPhase = phases["prepare"];
+ipc.on("snapshot", function () {
+	currentPhase.apply(this, arguments);
+});
+ipc.on("log", function (event, arg) {
+	console.log(arg);
+});
+
+app.on("ready", function () {
+	mainWindow = new BrowserWindow({
+		width: 64 * 16 * zoom,
+		height: 1024 * zoom,
+		//x: 5000, y: 5000,
+		webPreferences: {
+			zoomFactor: zoom,
+			nodeIntegration: true
+		},
+		show: false
+	});
+	mainWindow.showInactive();
+	mainWindow.loadURL("file://" + __dirname + "/index.html");
+	mainWindow.blurWebView();
+	//mainWindow.hide();
+});