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refactor(export): use message system for all exporters
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,29 +1,9 @@ | ||
| import { WebviewTag } from 'electron'; | ||
| import * as Fs from 'fs'; | ||
| import * as Util from 'util'; | ||
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| const writeFile = Util.promisify(Fs.writeFile); | ||
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| export interface ExportResult { | ||
| error?: Error; | ||
| result?: Buffer; | ||
| } | ||
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| export interface ExportWriteResult { | ||
| error?: Error; | ||
| } | ||
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| export abstract class Exporter { | ||
| public contents: Buffer; | ||
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| public abstract async createExport(webview: WebviewTag): Promise<ExportResult>; | ||
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| public async writeToDisk(path: string): Promise<ExportWriteResult> { | ||
| try { | ||
| await writeFile(path, this.contents); | ||
| return {}; | ||
| } catch (error) { | ||
| return { error }; | ||
| } | ||
| } | ||
| public abstract execute(path: string): void; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,108 +1,110 @@ | ||
| import * as Url from 'url'; | ||
| import * as uuid from 'uuid'; | ||
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| import * as Sender from '../message/client'; | ||
| import { Exporter, ExportResult } from './exporter'; | ||
| import { Exporter } from './exporter'; | ||
| import { ServerMessageType } from '../message'; | ||
| import { ViewStore } from '../store'; | ||
| import * as Url from 'url'; | ||
| import * as uuid from 'uuid'; | ||
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| export class PdfExporter extends Exporter { | ||
| public async createExport(): Promise<ExportResult> { | ||
| return new Promise<ExportResult>(resolve => { | ||
| const id = uuid.v4(); | ||
| const initial = 'data:text/html;<html></html>'; | ||
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| const webview = document.createElement('webview'); | ||
| webview.style.position = 'fixed'; | ||
| webview.style.top = '100vh'; | ||
| webview.src = initial; | ||
| webview.webpreferences = 'useContentSize=yes, javascript=no'; | ||
| document.body.insertBefore(webview, document.body.firstChild); | ||
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| const store = ViewStore.getInstance(); | ||
| let started; | ||
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| // (1) Request HTML contents from preview | ||
| const start = () => { | ||
| Sender.send({ | ||
| payload: undefined, | ||
| type: ServerMessageType.ContentRequest, | ||
| id | ||
| }); | ||
| }; | ||
|
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| // (2) Receive HTML response from preview and load into webview | ||
| // tslint:disable-next-line:no-any | ||
| const receive = message => { | ||
| if (message.type !== ServerMessageType.ContentResponse || message.id !== id) { | ||
| return; | ||
| } | ||
| public execute(path: string): void { | ||
| const id = uuid.v4(); | ||
| const initial = 'data:text/html;<html></html>'; | ||
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| const webview = document.createElement('webview'); | ||
| webview.style.position = 'fixed'; | ||
| webview.style.top = '100vh'; | ||
| webview.src = initial; | ||
| webview.webpreferences = 'useContentSize=yes, javascript=no'; | ||
| document.body.insertBefore(webview, document.body.firstChild); | ||
|
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| const store = ViewStore.getInstance(); | ||
| let started; | ||
|
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| // (1) Request HTML contents from preview | ||
| const start = () => { | ||
| Sender.send({ | ||
| payload: undefined, | ||
| type: ServerMessageType.ContentRequest, | ||
| id | ||
| }); | ||
| }; | ||
|
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| const payload = message.payload; | ||
| // (2) Receive HTML response from preview and load into webview | ||
| // tslint:disable-next-line:no-any | ||
| const receive = message => { | ||
| if (message.type !== ServerMessageType.ContentResponse || message.id !== id) { | ||
| return; | ||
| } | ||
|
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| const parsed = Url.parse(payload.location); | ||
| const payload = message.payload; | ||
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| if (parsed.host !== `localhost:${store.getServerPort()}`) { | ||
| return; | ||
| } | ||
| const parsed = Url.parse(payload.location); | ||
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| webview.style.width = `${payload.width}px`; | ||
| webview.style.height = `${payload.height}px`; | ||
| if (parsed.host !== `localhost:${store.getServerPort()}`) { | ||
| return; | ||
| } | ||
|
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| webview.loadURL( | ||
| `data:text/html;charset=utf-8,${encodeURIComponent(payload.document)}`, | ||
| { | ||
| baseURLForDataURL: payload.location | ||
| webview.style.width = `${payload.width}px`; | ||
| webview.style.height = `${payload.height}px`; | ||
|
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| webview.loadURL(`data:text/html;charset=utf-8,${encodeURIComponent(payload.document)}`, { | ||
| baseURLForDataURL: payload.location | ||
| }); | ||
| }; | ||
|
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| // (3) Wait for webview to be ready and capture the page | ||
| const createPdf = () => { | ||
| if (started !== id) { | ||
| return; | ||
| } | ||
|
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| webview.printToPDF( | ||
| { | ||
| marginsType: 1, | ||
| pageSize: 'A4', | ||
| printBackground: true, | ||
| printSelectionOnly: false, | ||
| landscape: false | ||
| }, | ||
| (error: Error, data: Buffer) => { | ||
| if (error) { | ||
| // Todo: Implement error message | ||
| // resolve({ error }); | ||
| return; | ||
| } | ||
| ); | ||
| }; | ||
|
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| // (3) Wait for webview to be ready and capture the page | ||
| const createPdf = () => { | ||
| if (started !== id) { | ||
| return; | ||
| } | ||
| this.contents = data; | ||
|
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| webview.printToPDF( | ||
| { | ||
| marginsType: 1, | ||
| pageSize: 'A4', | ||
| printBackground: true, | ||
| printSelectionOnly: false, | ||
| landscape: false | ||
| }, | ||
| (error: Error, data: Buffer) => { | ||
| if (error) { | ||
| resolve({ error }); | ||
| return; | ||
| } | ||
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| this.contents = data; | ||
| resolve({ result: this.contents }); | ||
|
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| setTimeout(() => { | ||
| document.body.removeChild(webview); | ||
| }); | ||
| } | ||
| ); | ||
| }; | ||
| Sender.send({ | ||
| id: uuid.v4(), | ||
| type: ServerMessageType.ExportPDF, | ||
| payload: { path, content: this.contents } | ||
| }); | ||
|
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| webview.addEventListener('did-finish-load', () => { | ||
| if (webview.src === initial) { | ||
| return; | ||
| setTimeout(() => { | ||
| document.body.removeChild(webview); | ||
| }); | ||
| } | ||
| createPdf(); | ||
| }); | ||
| ); | ||
| }; | ||
|
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| webview.addEventListener('did-finish-load', () => { | ||
| if (webview.src === initial) { | ||
| return; | ||
| } | ||
| createPdf(); | ||
| }); | ||
|
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| Sender.receive(receive); | ||
| Sender.receive(receive); | ||
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| webview.addEventListener('dom-ready', () => { | ||
| if (started === id) { | ||
| return; | ||
| } | ||
| webview.addEventListener('dom-ready', () => { | ||
| if (started === id) { | ||
| return; | ||
| } | ||
|
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| started = id; | ||
| start(); | ||
| }); | ||
| started = id; | ||
| start(); | ||
| }); | ||
| } | ||
| } |
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