app/electron/main.js

// SiYuan - Build Your Eternal Digital Garden
// Copyright (c) 2020-present, b3log.org
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

const {
    app, BrowserWindow, shell, Menu, screen, ipcMain, globalShortcut, Tray,
} = require("electron");
const path = require("path");
const fs = require("fs");
const net = require("net");
const fetch = require("electron-fetch").default;
process.noAsar = true;
const appDir = path.dirname(app.getAppPath());
const isDevEnv = process.env.NODE_ENV === "development";
const appVer = app.getVersion();
const confDir = path.join(app.getPath("home"), ".config", "siyuan");
const windowStatePath = path.join(confDir, "windowState.json");
let bootWindow;
let firstOpen = false;
let workspaces = []; // workspaceDir, id, browserWindow, tray
let kernelPort = 6806;
let resetWindowStateOnRestart = false;
require("@electron/remote/main").initialize();

if (!app.requestSingleInstanceLock()) {
    app.quit();
    return;
}

try {
    firstOpen = !fs.existsSync(path.join(confDir, "workspace.json"));
    if (!fs.existsSync(confDir)) {
        fs.mkdirSync(confDir, {mode: 0o755, recursive: true});
    }
} catch (e) {
    console.error(e);
    require("electron").dialog.showErrorBox("创建配置目录失败 Failed to create config directory", "思源需要在用户家目录下创建配置文件夹（~/.config/siyuan），请确保该路径具有写入权限。\n\nSiYuan needs to create a configuration folder (~/.config/siyuan) in the user's home directory. Please make sure that the path has write permissions.");
    app.exit();
}

const exitApp = (port, errorWindowId) => {
    let tray;
    let mainWindow;

    // 关闭端口相同的所有非主窗口
    BrowserWindow.getAllWindows().forEach((item) => {
        try {
            const currentURL = new URL(item.getURL());
            if (port.toString() === currentURL.port.toString()) {
                if (currentURL.href.indexOf("/stage/build/app/?v=") > -1) {
                    mainWindow = item;
                } else {
                    item.destroy();
                }
            }
        } catch (e) {
            // load file is not a url
        }
    });
    workspaces.find((item, index) => {
        if (mainWindow.id === item.browserWindow.id) {
            if (workspaces.length > 1) {
                item.browserWindow.destroy();
            }
            workspaces.splice(index, 1);
            tray = item.tray;
            return true;
        }
    });
    if (tray && ("win32" === process.platform || "linux" === process.platform)) {
        tray.destroy();
    }
    if (workspaces.length === 0 && mainWindow) {
        try {
            if (resetWindowStateOnRestart) {
                fs.writeFileSync(windowStatePath, "{}");
            } else {
                const bounds = mainWindow.getBounds();
                fs.writeFileSync(windowStatePath, JSON.stringify({
                    isMaximized: mainWindow.isMaximized(),
                    fullscreen: mainWindow.isFullScreen(),
                    isDevToolsOpened: mainWindow.webContents.isDevToolsOpened(),
                    x: bounds.x,
                    y: bounds.y,
                    width: bounds.width,
                    height: bounds.height,
                }));
            }
        } catch (e) {
            writeLog(e);
        }

        if (errorWindowId) {
            BrowserWindow.getAllWindows().forEach((item) => {
                if (errorWindowId !== item.id) {
                    item.destroy();
                }
            });
        } else {
            app.exit();
        }
        globalShortcut.unregisterAll();
        writeLog("exited ui");
    }
};

const getServer = (port = kernelPort) => {
    return "http://127.0.0.1:" + port;
};

const sleep = (ms) => {
    return new Promise(resolve => setTimeout(resolve, ms));
};

const showErrorWindow = (title, content) => {
    let errorHTMLPath = path.join(appDir, "app", "electron", "error.html");
    if (isDevEnv) {
        errorHTMLPath = path.join(appDir, "electron", "error.html");
    }
    const errWindow = new BrowserWindow({
        width: screen.getPrimaryDisplay().size.width / 2,
        height: screen.getPrimaryDisplay().workAreaSize.height / 2,
        frame: false,
        icon: path.join(appDir, "stage", "icon-large.png"),
        webPreferences: {
            nodeIntegration: true, webviewTag: true, webSecurity: false, contextIsolation: false,
        },
    });
    require("@electron/remote/main").enable(errWindow.webContents);
    errWindow.loadFile(errorHTMLPath, {
        query: {
            home: app.getPath("home"),
            v: appVer,
            title: title,
            content: content,
            icon: path.join(appDir, "stage", "icon-large.png"),
        },
    });
    errWindow.show();
    return errWindow.id;
};

const writeLog = (out) => {
    console.log(out);
    const logFile = path.join(confDir, "app.log");
    let log = "";
    const maxLogLines = 1024;
    try {
        if (fs.existsSync(logFile)) {
            log = fs.readFileSync(logFile).toString();
            let lines = log.split("\n");
            if (maxLogLines < lines.length) {
                log = lines.slice(maxLogLines / 2, maxLogLines).join("\n") + "\n";
            }
        }
        out = out.toString();
        out = new Date().toISOString().replace(/T/, " ").replace(/\..+/, "") + " " + out;
        log += out + "\n";
        fs.writeFileSync(logFile, log);
    } catch (e) {
        console.error(e);
    }
};

const boot = () => {
    // 恢复主窗体状态
    let oldWindowState = {};
    try {
        oldWindowState = JSON.parse(fs.readFileSync(windowStatePath, "utf8"));
    } catch (e) {
        fs.writeFileSync(windowStatePath, "{}");
    }
    let defaultWidth;
    let defaultHeight;
    let workArea;
    try {
        defaultWidth = screen.getPrimaryDisplay().size.width;
        defaultHeight = screen.getPrimaryDisplay().workAreaSize.height;
        workArea = screen.getPrimaryDisplay().workArea;
    } catch (e) {
        console.error(e);
    }
    const windowState = Object.assign({}, {
        isMaximized: true,
        fullscreen: false,
        isDevToolsOpened: false,
        x: 0,
        y: 0,
        width: defaultWidth,
        height: defaultHeight,
    }, oldWindowState);

    let x = windowState.x;
    let y = windowState.y;
    if (workArea) {
        // 窗口大小等同于或大于 workArea 时，缩小会隐藏到左下角
        if (windowState.width >= workArea.width || windowState.height >= workArea.height) {
            windowState.width = Math.min(defaultWidth, workArea.width);
            windowState.height = Math.min(defaultHeight, workArea.height);
        }
        if (x > workArea.width) {
            x = 0;
        }
        if (y > workArea.height) {
            y = 0;
        }
    }
    if (windowState.width < 400) {
        windowState.width = 400;
    }
    if (windowState.height < 300) {
        windowState.height = 300;
    }
    if (x < 0) {
        x = 0;
    }
    if (y < 0) {
        y = 0;
    }

    // 创建主窗体
    const currentWindow = new BrowserWindow({
        show: false,
        backgroundColor: "#FFF", // 桌面端主窗体背景色设置为 `#FFF` Fix https://github.com/siyuan-note/siyuan/issues/4544
        width: windowState.width,
        height: windowState.height,
        minWidth: 493,
        minHeight: 376,
        x,
        y,
        fullscreenable: true,
        fullscreen: windowState.fullscreen,
        trafficLightPosition: {x: 8, y: 8},
        webPreferences: {
            nodeIntegration: true,
            webviewTag: true,
            webSecurity: false,
            contextIsolation: false,
            autoplayPolicy: "user-gesture-required" // 桌面端禁止自动播放多媒体 https://github.com/siyuan-note/siyuan/issues/7587
        },
        frame: "darwin" === process.platform,
        titleBarStyle: "hidden",
        icon: path.join(appDir, "stage", "icon-large.png"),
    });
    require("@electron/remote/main").enable(currentWindow.webContents);
    currentWindow.webContents.userAgent = "SiYuan/" + appVer + " https://b3log.org/siyuan Electron";

    currentWindow.webContents.session.setSpellCheckerLanguages(["en-US"]);

    // 发起互联网服务请求时绕过安全策略 https://github.com/siyuan-note/siyuan/issues/5516
    currentWindow.webContents.session.webRequest.onBeforeSendHeaders((details, cb) => {
        if (-1 < details.url.indexOf("bili")) {
            // B 站不移除 Referer https://github.com/siyuan-note/siyuan/issues/94
            cb({requestHeaders: details.requestHeaders});
            return;
        }

        for (let key in details.requestHeaders) {
            if ("referer" === key.toLowerCase()) {
                delete details.requestHeaders[key];
            }
        }
        cb({requestHeaders: details.requestHeaders});
    });
    currentWindow.webContents.session.webRequest.onHeadersReceived((details, cb) => {
        for (let key in details.responseHeaders) {
            if ("x-frame-options" === key.toLowerCase()) {
                delete details.responseHeaders[key];
            } else if ("content-security-policy" === key.toLowerCase()) {
                delete details.responseHeaders[key];
            } else if ("access-control-allow-origin" === key.toLowerCase()) {
                delete details.responseHeaders[key];
            }
        }
        cb({responseHeaders: details.responseHeaders});
    });

    currentWindow.webContents.on("did-finish-load", () => {
        let siyuanOpenURL;
        if ("win32" === process.platform || "linux" === process.platform) {
            siyuanOpenURL = process.argv.find((arg) => arg.startsWith("siyuan://"));
        }
        if (siyuanOpenURL) {
            if (currentWindow.isMinimized()) {
                currentWindow.restore();
            }
            if (!currentWindow.isVisible()) {
                currentWindow.show();
            }
            currentWindow.focus();
            setTimeout(() => { // 等待界面js执行完毕
                writeLog(siyuanOpenURL);
                currentWindow.webContents.send("siyuan-openurl", siyuanOpenURL);
            }, 2000);
        }
    });

    if (windowState.isDevToolsOpened) {
        currentWindow.webContents.openDevTools({mode: "bottom"});
    }

    // 主界面事件监听
    currentWindow.once("ready-to-show", () => {
        currentWindow.show();
        if (windowState.isMaximized) {
            currentWindow.maximize();
        } else {
            currentWindow.unmaximize();
        }
        if (bootWindow && !bootWindow.isDestroyed()) {
            bootWindow.destroy();
        }
    });

    // 加载主界面
    currentWindow.loadURL(getServer() + "/stage/build/app/index.html?v=" + new Date().getTime());

    // 菜单
    const productName = "SiYuan";
    const template = [{
        label: productName, submenu: [{
            label: `About ${productName}`, role: "about",
        }, {type: "separator"}, {role: "services"}, {type: "separator"}, {
            label: `Hide ${productName}`, role: "hide",
        }, {role: "hideOthers"}, {role: "unhide"}, {type: "separator"}, {
            label: `Quit ${productName}`, role: "quit",
        },],
    }, {
        role: "editMenu",
        submenu: [{role: "cut"}, {role: "copy"}, {role: "paste"}, {
            role: "pasteAndMatchStyle",
            accelerator: "CmdOrCtrl+Shift+C"
        }, {role: "selectAll"},],
    }, {
        role: "windowMenu",
        submenu: [{role: "minimize"}, {role: "zoom"}, {role: "togglefullscreen"}, {type: "separator"}, {role: "toggledevtools"}, {type: "separator"}, {role: "front"},],
    },];
    const menu = Menu.buildFromTemplate(template);
    Menu.setApplicationMenu(menu);
    // 当前页面链接使用浏览器打开
    currentWindow.webContents.on("will-navigate", (event, url) => {
        const currentURL = new URL(event.sender.getURL());
        if (url.startsWith(getServer(currentURL.port))) {
            return;
        }

        event.preventDefault();
        shell.openExternal(url);
    });

    currentWindow.on("close", (event) => {
        if (currentWindow && !currentWindow.isDestroyed()) {
            currentWindow.webContents.send("siyuan-save-close", false);
        }
        event.preventDefault();
    });
    workspaces.push({
        browserWindow: currentWindow, id: currentWindow.id,
    });
};

const showWindow = (wnd) => {
    if (!wnd || wnd.isDestroyed()) {
        return;
    }

    if (wnd.isMinimized()) {
        wnd.restore();
    }
    if (!wnd.isVisible()) {
        wnd.show();
    }
    wnd.focus();
};

const initKernel = (workspace, port, lang) => {
    return new Promise(async (resolve) => {
        bootWindow = new BrowserWindow({
            width: screen.getPrimaryDisplay().size.width / 2,
            height: screen.getPrimaryDisplay().workAreaSize.height / 2,
            frame: false,
            icon: path.join(appDir, "stage", "icon-large.png"),
            transparent: "linux" !== process.platform,
        });

        const kernelName = "win32" === process.platform ? "SiYuan-Kernel.exe" : "SiYuan-Kernel";
        const kernelPath = path.join(appDir, "kernel", kernelName);
        if (!fs.existsSync(kernelPath)) {
            showErrorWindow("⚠️ 内核文件丢失 Kernel is missing", "<div>内核可执行文件丢失，请重新安装思源，并将思源加入杀毒软件信任列表。</div><div>The kernel binary is not found, please reinstall SiYuan and add SiYuan into the trust list of your antivirus software.</div>");
            bootWindow.destroy();
            resolve(false);
            return;
        }

        if (!isDevEnv || workspaces.length > 0) {
            if (port && "" !== port) {
                kernelPort = port;
            } else {
                const getAvailablePort = () => {
                    // https://gist.github.com/mikeal/1840641
                    return new Promise((portResolve, portReject) => {
                        const server = net.createServer();
                        server.on("error", error => {
                            writeLog(error);
                            kernelPort = "";
                            portReject();
                        });
                        server.listen(0, () => {
                            kernelPort = server.address().port;
                            server.close(() => portResolve(kernelPort));
                        });
                    });
                };
                await getAvailablePort();
            }
        }
        writeLog("got kernel port [" + kernelPort + "]");
        if (!kernelPort) {
            bootWindow.destroy();
            resolve(false);
            return;
        }
        const cmds = ["--port", kernelPort, "--wd", appDir];
        if (isDevEnv && workspaces.length === 0) {
            cmds.push("--mode", "dev");
        }
        if (workspace && "" !== workspace) {
            cmds.push("--workspace", workspace);
        }
        if (port && "" !== port) {
            cmds.push("--port", port);
        }
        if (lang && "" !== lang) {
            cmds.push("--lang", lang);
        }
        let cmd = `ui version [${appVer}], booting kernel [${kernelPath} ${cmds.join(" ")}]`;
        writeLog(cmd);
        if (!isDevEnv || workspaces.length > 0) {
            const cp = require("child_process");
            const kernelProcess = cp.spawn(kernelPath, cmds, {
                detached: false, // 桌面端内核进程不再以游离模式拉起 https://github.com/siyuan-note/siyuan/issues/6336
                stdio: "ignore",
            },);

            const currentKernelPort = kernelPort;
            writeLog("booted kernel process [pid=" + kernelProcess.pid + ", port=" + kernelPort + "]");
            kernelProcess.on("close", (code) => {
                writeLog(`kernel [pid=${kernelProcess.pid}, port=${currentKernelPort}] exited with code [${code}]`);
                if (0 !== code) {
                    let errorWindowId;
                    switch (code) {
                        case 20:
                            errorWindowId = showErrorWindow("⚠️ 数据库被锁定 The database is locked", "<div>数据库文件正在被其他进程占用，请检查是否同时存在多个内核进程（SiYuan Kernel）服务相同的工作空间。</div><div>The database file is being occupied by other processes, please check whether there are multiple kernel processes (SiYuan Kernel) serving the same workspace at the same time.</div>");
                            break;
                        case 21:
                            errorWindowId = showErrorWindow("⚠️ 监听端口 " + currentKernelPort + " 失败 Failed to listen to port " + currentKernelPort, "<div>监听 " + currentKernelPort + " 端口失败，请确保程序拥有网络权限并不受防火墙和杀毒软件阻止。</div><div>Failed to listen to port " + currentKernelPort + ", please make sure the program has network permissions and is not blocked by firewalls and antivirus software.</div>");
                            break;
                        case 22:
                            errorWindowId = showErrorWindow("⚠️ 创建配置目录失败 Failed to create config directory", "<div>思源需要在用户家目录下创建配置文件夹（~/.config/siyuan），请确保该路径具有写入权限。</div><div>SiYuan needs to create a configuration folder (~/.config/siyuan) in the user\'s home directory. Please make sure that the path has write permissions.</div>");
                            break;
                        case 24: // 工作空间已被锁定，尝试切换到第一个打开的工作空间
                            if (workspaces && 0 < workspaces.length) {
                                showWindow(workspaces[0].browserWindow);
                            }

                            errorWindowId = showErrorWindow("⚠️ 工作空间已被锁定 The workspace is locked", "<div>该工作空间正在被使用。</div><div>The workspace is in use.</div>");
                            break;
                        case 25:
                            errorWindowId = showErrorWindow("⚠️ 创建工作空间目录失败 Failed to create workspace directory", "<div>创建工作空间目录失败。</div><div>Failed to create workspace directory.</div>");
                            break;
                        case 26:
                            errorWindowId = showErrorWindow("⚠️ 文件系统读写错误 File system access error", "<div>请检查文件系统权限，并确保没有其他程序正在读写文件；<br>请勿使用第三方同步盘进行数据同步，否则数据会被损坏（iCloud/OneDrive/Dropbox/Google Drive/坚果云/百度网盘/腾讯微云等）</div><div>Please check file system permissions and make sure no other programs are reading or writing to the file;<br>Do not use a third-party sync disk for data sync, otherwise the data will be damaged (OneDrive/Dropbox/Google Drive/Nutstore/Baidu Netdisk/Tencent Weiyun, etc.)</div>");
                            break;
                        case 0:
                            break;
                        default:
                            errorWindowId = showErrorWindow("⚠️ 内核因未知原因退出 The kernel exited for unknown reasons", `<div>思源内核因未知原因退出 [code=${code}]，请尝试重启操作系统后再启动思源。如果该问题依然发生，请检查杀毒软件是否阻止思源内核启动。</div><div>SiYuan Kernel exited for unknown reasons [code=${code}], please try to reboot your operating system and then start SiYuan again. If occurs this problem still, please check your anti-virus software whether kill the SiYuan Kernel.</div>`);
                            break;
                    }

                    exitApp(currentKernelPort, errorWindowId);
                    bootWindow.destroy();
                    resolve(false);
                }
            });
        }

        let gotVersion = false;
        let apiData;
        let count = 0;
        writeLog("checking kernel version");
        while (!gotVersion && count < 15) {
            try {
                const apiResult = await fetch(getServer() + "/api/system/version");
                apiData = await apiResult.json();
                gotVersion = true;
                bootWindow.setResizable(false);
                bootWindow.loadURL(getServer() + "/appearance/boot/index.html");
                bootWindow.show();
            } catch (e) {
                writeLog("get kernel version failed: " + e.message);
                await sleep(100);
            } finally {
                count++;
                if (14 < count) {
                    writeLog("get kernel ver failed");
                    showErrorWindow("⚠️ 获取内核服务端口失败 Failed to get kernel serve port", "<div>获取内核服务端口失败，请确保程序拥有网络权限并不受防火墙和杀毒软件阻止。</div><div>Failed to get kernel serve port, please make sure the program has network permissions and is not blocked by firewalls and antivirus software.</div>");
                    bootWindow.destroy();
                    resolve(false);
                }
            }
        }

        if (!gotVersion) {
            return;
        }

        if (0 === apiData.code) {
            writeLog("got kernel version [" + apiData.data + "]");
            if (!isDevEnv && apiData.data !== appVer) {
                writeLog(`kernel [${apiData.data}] is running, shutdown it now and then start kernel [${appVer}]`);
                fetch(getServer() + "/api/system/exit", {method: "POST"});
                bootWindow.destroy();
                resolve(false);
            } else {
                let progressing = false;
                while (!progressing) {
                    try {
                        const progressResult = await fetch(getServer() + "/api/system/bootProgress");
                        const progressData = await progressResult.json();
                        if (progressData.data.progress >= 100) {
                            resolve(true);
                            progressing = true;
                        } else {
                            await sleep(100);
                        }
                    } catch (e) {
                        writeLog("get boot progress failed: " + e.message);
                        fetch(getServer() + "/api/system/exit", {method: "POST"});
                        bootWindow.destroy();
                        resolve(false);
                        progressing = true;
                    }
                }
            }
        } else {
            writeLog(`get kernel version failed: ${apiData.code}, ${apiData.msg}`);
            resolve(false);
        }
    });
};

app.setAsDefaultProtocolClient("siyuan");

app.commandLine.appendSwitch("disable-web-security");
app.commandLine.appendSwitch("auto-detect", "false");
app.commandLine.appendSwitch("no-proxy-server");
app.commandLine.appendSwitch("enable-features", "PlatformHEVCDecoderSupport");

app.setPath("userData", app.getPath("userData") + "-Electron"); // `~/.config` 下 Electron 相关文件夹名称改为 `SiYuan-Electron` https://github.com/siyuan-note/siyuan/issues/3349

app.whenReady().then(() => {
    const resetTrayMenu = (tray, lang, mainWindow) => {
        const trayMenuTemplate = [{
            label: mainWindow.isVisible() ? lang.hideWindow : lang.showWindow, click: () => {
                showHideWindow(tray, lang, mainWindow);
            },
        }, {
            label: lang.officialWebsite, click: () => {
                shell.openExternal("https://b3log.org/siyuan/");
            },
        }, {
            label: lang.openSource, click: () => {
                shell.openExternal("https://github.com/siyuan-note/siyuan");
            },
        }, {
            label: lang.resetWindow, type: "checkbox", click: v => {
                resetWindowStateOnRestart = v.checked;
                mainWindow.webContents.send("siyuan-save-close", true);
            },
        }, {
            label: lang.quit, click: () => {
                mainWindow.webContents.send("siyuan-save-close", true);
            },
        },];

        if ("win32" === process.platform) {
            // Windows 端支持窗口置顶 https://github.com/siyuan-note/siyuan/issues/6860
            trayMenuTemplate.splice(1, 0, {
                label: mainWindow.isAlwaysOnTop() ? lang.cancelWindowTop : lang.setWindowTop, click: () => {
                    if (!mainWindow.isAlwaysOnTop()) {
                        mainWindow.setAlwaysOnTop(true);
                    } else {
                        mainWindow.setAlwaysOnTop(false);
                    }
                    resetTrayMenu(tray, lang, mainWindow);
                },
            });
        }
        const contextMenu = Menu.buildFromTemplate(trayMenuTemplate);
        tray.setContextMenu(contextMenu);
    };

    const hideWindow = (wnd) => {
        // 通过 `Alt+M` 最小化后焦点回到先前的窗口 https://github.com/siyuan-note/siyuan/issues/7275
        wnd.minimize();
        wnd.hide();
    };

    const showHideWindow = (tray, lang, mainWindow) => {
        if (!mainWindow.isVisible()) {
            if (mainWindow.isMinimized()) {
                mainWindow.restore();
            }
            mainWindow.show();
        } else {
            hideWindow(mainWindow);
        }

        resetTrayMenu(tray, lang, mainWindow);
    };

    ipcMain.on("siyuan-first-quit", () => {
        app.exit();
    });
    ipcMain.on("siyuan-show", (event, id) => {
        showWindow(BrowserWindow.fromId(id));
    });
    ipcMain.on("siyuan-config-tray", (event, data) => {
        workspaces.find(item => {
            if (item.id === data.id) {
                hideWindow(item.browserWindow);
                if ("win32" === process.platform || "linux" === process.platform) {
                    resetTrayMenu(item.tray, data.languages, item.browserWindow);
                }
                return true;
            }
        });
    });
    ipcMain.on("siyuan-export-pdf", (event, data) => {
        BrowserWindow.fromId(data.id).webContents.send("siyuan-export-pdf", data);
    });
    ipcMain.on("siyuan-export-close", (event, id) => {
        BrowserWindow.fromId(id).webContents.send("siyuan-export-close", id);
    });
    ipcMain.on("siyuan-export-prevent", (event, id) => {
        BrowserWindow.fromId(id).webContents.on("will-navigate", (event, url) => {
            const currentURL = new URL(event.sender.getURL());
            event.preventDefault();
            if (url.startsWith(getServer(currentURL.port))) {
                return;
            }
            shell.openExternal(url);
        });
    });
    ipcMain.on("siyuan-quit", (event, port) => {
        exitApp(port);
    });
    ipcMain.on("siyuan-openwindow", (event, data) => {
        const mainWindow = BrowserWindow.fromId(data.id);
        const mainBounds = mainWindow.getBounds();
        const mainScreen = screen.getDisplayNearestPoint({x: mainBounds.x, y: mainBounds.y});
        const win = new BrowserWindow({
            show: true,
            backgroundColor: "#FFF",
            trafficLightPosition: {x: 8, y: 13},
            width: mainScreen.size.width * 0.7,
            height: mainScreen.size.height * 0.9,
            minWidth: 493,
            center: true,
            minHeight: 376,
            fullscreenable: true,
            frame: "darwin" === process.platform,
            icon: path.join(appDir, "stage", "icon-large.png"),
            titleBarStyle: "hidden",
            webPreferences: {
                contextIsolation: false,
                nodeIntegration: true,
                webviewTag: true,
                webSecurity: false,
                autoplayPolicy: "user-gesture-required" // 桌面端禁止自动播放多媒体 https://github.com/siyuan-note/siyuan/issues/7587
            },
        });
        win.loadURL(data.url);
        const targetScreen = screen.getDisplayNearestPoint(screen.getCursorScreenPoint());
        if (mainScreen.id !== targetScreen.id) {
            win.setBounds(targetScreen.workArea);
        }
        require("@electron/remote/main").enable(win.webContents);
    });
    ipcMain.on("siyuan-open-workspace", (event, data) => {
        const foundWorkspace = workspaces.find((item) => {
            if (item.workspaceDir === data.workspace) {
                showWindow(item.browserWindow);
                return true;
            }
        });
        if (!foundWorkspace) {
            initKernel(data.workspace, "", data.lang).then((isSucc) => {
                if (isSucc) {
                    boot();
                }
            });
        }
    });
    ipcMain.on("siyuan-init", async (event, data) => {
        const exitWS = workspaces.find(item => {
            if (data.id === item.id && item.workspaceDir) {
                return true;
            }
        });
        if (exitWS) {
            return;
        }
        let tray;
        if ("win32" === process.platform || "linux" === process.platform) {
            // 系统托盘
            tray = new Tray(path.join(appDir, "stage", "icon-large.png"));
            tray.setToolTip(`${path.basename(data.workspaceDir)} - SiYuan v${appVer}`);
            const mainWindow = BrowserWindow.fromId(data.id);
            resetTrayMenu(tray, data.languages, mainWindow);
            tray.on("click", () => {
                showHideWindow(tray, data.languages, mainWindow);
            });
        }
        workspaces.find(item => {
            if (data.id === item.id) {
                item.workspaceDir = data.workspaceDir;
                item.tray = tray;
                return true;
            }
        });
        await fetch(getServer(data.port) + "/api/system/uiproc?pid=" + process.pid, {method: "POST"});
    });
    ipcMain.on("siyuan-hotkey", (event, data) => {
        globalShortcut.unregisterAll();
        if (!data.hotkey) {
            return;
        }
        globalShortcut.register(data.hotkey, () => {
            workspaces.forEach(item => {
                const mainWindow = item.browserWindow;
                if (mainWindow.isMinimized()) {
                    mainWindow.restore();
                    if (!mainWindow.isVisible()) {
                        mainWindow.show();
                    }
                } else {
                    if (mainWindow.isVisible()) {
                        if (1 === workspaces.length) { // 改进 `Alt+M` 激活窗口 https://github.com/siyuan-note/siyuan/issues/7258
                            if (!mainWindow.isFocused()) {
                                mainWindow.show();
                            } else {
                                hideWindow(mainWindow);
                            }
                        } else {
                            hideWindow(mainWindow);
                        }
                    } else {
                        mainWindow.show();
                    }
                }

                if ("win32" === process.platform || "linux" === process.platform) {
                    resetTrayMenu(item.tray, data.languages, mainWindow);
                }
            });
        });
    });
    ipcMain.on("siyuan-send_windows", (event, data) => {
        BrowserWindow.getAllWindows().forEach(item => {
            item.webContents.send("siyuan-send_windows", data);
        });
    });

    if (firstOpen) {
        const firstOpenWindow = new BrowserWindow({
            width: screen.getPrimaryDisplay().size.width * 0.6,
            height: screen.getPrimaryDisplay().workAreaSize.height * 0.8,
            frame: false,
            icon: path.join(appDir, "stage", "icon-large.png"),
            transparent: "linux" !== process.platform,
            webPreferences: {
                nodeIntegration: true, webviewTag: true, webSecurity: false, contextIsolation: false,
            },
        });
        require("@electron/remote/main").enable(firstOpenWindow.webContents);
        let initHTMLPath = path.join(appDir, "app", "electron", "init.html");
        if (isDevEnv) {
            initHTMLPath = path.join(appDir, "electron", "init.html");
        }

        // 改进桌面端初始化时使用的外观语言 https://github.com/siyuan-note/siyuan/issues/6803
        let languages = app.getPreferredSystemLanguages();
        let language = languages && 0 < languages.length && "zh-Hans-CN" === languages[0] ? "zh_CN" : "en_US";
        firstOpenWindow.loadFile(initHTMLPath, {
            query: {
                lang: language,
                home: app.getPath("home"),
                v: appVer,
                icon: path.join(appDir, "stage", "icon-large.png"),
            },
        });
        firstOpenWindow.show();
        // 初始化启动
        ipcMain.on("siyuan-first-init", (event, data) => {
            initKernel(data.workspace, "", data.lang).then((isSucc) => {
                if (isSucc) {
                    boot();
                }
            });
            firstOpenWindow.destroy();
        });
    } else {
        const getArg = (name) => {
            for (let i = 0; i < process.argv.length; i++) {
                if (process.argv[i].startsWith(name)) {
                    return process.argv[i].split("=")[1];
                }
            }
        };

        const workspace = getArg("--workspace");
        if (workspace) {
            writeLog("got arg [--workspace=" + workspace + "]");
        }
        const port = getArg("--port");
        if (port) {
            writeLog("got arg [--port=" + port + "]");
        }
        initKernel(workspace, port, "").then((isSucc) => {
            if (isSucc) {
                boot();
            }
        });
    }
});

app.on("open-url", (event, url) => { // for macOS
    if (url.startsWith("siyuan://")) {
        workspaces.forEach(item => {
            if (item.browserWindow && !item.browserWindow.isDestroyed()) {
                item.browserWindow.webContents.send("siyuan-openurl", url);
            }
        });
    }
});

app.on("second-instance", (event, argv) => {
    writeLog("second-instance [" + argv + "]");
    let workspace = argv.find((arg) => arg.startsWith("--workspace="));
    if (workspace) {
        workspace = workspace.split("=")[1];
        writeLog("got second-instance arg [--workspace=" + workspace + "]");
    }
    let port = argv.find((arg) => arg.startsWith("--port="));
    if (port) {
        port = port.split("=")[1];
        writeLog("got second-instance arg [--port=" + port + "]");
    } else {
        port = 0;
    }
    const foundWorkspace = workspaces.find(item => {
        if (item.browserWindow && !item.browserWindow.isDestroyed()) {
            if (workspace && workspace === item.workspaceDir) {
                showWindow(item.browserWindow);
                return true;
            }
        }
    });
    if (foundWorkspace) {
        return;
    }
    if (workspace) {
        initKernel(workspace, port, "").then((isSucc) => {
            if (isSucc) {
                boot();
            }
        });
        return;
    }

    const siyuanURL = argv.find((arg) => arg.startsWith("siyuan://"));
    workspaces.forEach(item => {
        if (item.browserWindow && !item.browserWindow.isDestroyed() && siyuanURL) {
            item.browserWindow.webContents.send("siyuan-openurl", siyuanURL);
        }
    });

    if (!siyuanURL && 0 < workspaces.length) {
        showWindow(workspaces[0].browserWindow);
    }
});

app.on("activate", () => {
    if (workspaces.length > 0) {
        const mainWindow = workspaces[0].browserWindow;
        if (mainWindow && !mainWindow.isDestroyed()) {
            mainWindow.show();
        }
    }
    if (BrowserWindow.getAllWindows().length === 0) {
        boot();
    }
});

// 在编辑器内打开链接的处理，比如 iframe 上的打开链接。
app.on("web-contents-created", (webContentsCreatedEvent, contents) => {
    contents.setWindowOpenHandler((details) => {
        shell.openExternal(details.url);
        return {action: "deny"};
    });
});

app.on("before-quit", (event) => {
    workspaces.forEach(item => {
        if (item.browserWindow && !item.browserWindow.isDestroyed()) {
            event.preventDefault();
            item.browserWindow.webContents.send("siyuan-save-close", true);
        }
    });
});

const {powerMonitor} = require("electron");

powerMonitor.on("suspend", () => {
    writeLog("system suspend");
});

powerMonitor.on("resume", async () => {
    // 桌面端系统休眠唤醒后判断网络连通性后再执行数据同步 https://github.com/siyuan-note/siyuan/issues/6687
    writeLog("system resume");
    const isOnline = async () => {
        try {
            const result = await fetch("https://www.baidu.com", {timeout: 1000});
            return 200 === result.status;
        } catch (e) {
            try {
                const result = await fetch("https://icanhazip.com", {timeout: 1000});
                return 200 === result.status;
            } catch (e) {
                return false;
            }
        }
    };
    let online = false;
    for (let i = 0; i < 7; i++) {
        if (await isOnline()) {
            online = true;
            break;
        }

        writeLog("network is offline");
        await sleep(1000);
    }

    if (!online) {
        writeLog("network is offline, do not sync after system resume");
        return;
    }

    workspaces.forEach(item => {
        const currentURL = new URL(item.browserWindow.getURL());
        const server = getServer(currentURL.port);
        writeLog("sync after system resume [" + server + "/api/sync/performSync" + "]");
        fetch(server + "/api/sync/performSync", {method: "POST"});
    });
});

powerMonitor.on("shutdown", () => {
    writeLog("system shutdown");
    workspaces.forEach(item => {
        const currentURL = new URL(item.browserWindow.getURL());
        fetch(getServer(currentURL.port) + "/api/system/exit", {method: "POST"});
    });
});