kd-aiot
/
print-utils-desktop


			
				
					
						
						
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							import { printRecordService } from './database/PrintRecordService'
import { getMainWindow } from 'ee-core/electron/window'
import { logger } from 'ee-core/log'
import { BrowserWindow } from 'electron'
import {Event} from '../utils/Event'
import {PrintEvent} from "../event/PrintEvent";
import {Channel} from "../channel/Channel";
/**
 * 打印服务
 */
class PrintService {

    constructor() {
    }

    _init() {
        Event.on(PrintEvent.PRINT_DATA, async (res) => {
            await this.printData(res)
        })
    }

    /**
     * 获取本地打印机列表
     */
    async listLocalPrinters(): Promise<Electron.PrinterInfo[]> {
        return getMainWindow().webContents.getPrintersAsync();
    }

    async printData(data: any) {
        getMainWindow().webContents.send(Channel.PRINT_START)
        const printWindow = new BrowserWindow({ show: false });
        const printData = `<html><body>${data.html}</body></html>`
        getMainWindow().webContents.send(Channel.PRINT_DATA, printData)
        await printWindow.loadURL(`data:text/html, ${printData}`);
        printWindow.webContents.on('did-finish-load', () => {
            getMainWindow().webContents.send(Channel.PRINT_PROGRESS)
            printWindow.webContents.print({
                silent: true,
                printBackground: true,
                deviceName: data.deviceName ,
                margins:data.margins||{
                    marginType :'none'
                },
                landscape:data.landscape||false,
                copies:data.copies||1,
                dpi:data.dpi,
                header:data.header,
                footer:data.footer,
                pageSize:data.pageSize //A4,Legal | {height:}
            }, (success: boolean, failureReason: string) => {
                logger.info('打印结果：', success, failureReason)
                getMainWindow().webContents.send(Channel.PRINT_RESULT, {
                    success,
                    failureReason
                })
                printRecordService.add({
                    printerName: data.deviceName,
                    printHtml: data.html,
                    printStatus: success ? 'success' : 'failure',
                    failureReason: failureReason
                })
                printWindow.close();
            }); // 静默打印
        });
    }

}
PrintService.toString = () => '[class PrintService]'
const printService = new PrintService()
export {
    PrintService,
    printService
}