feat: 优化名片分享海报与详情交互
- 为律师详情页增加分享海报生成与分享封面图 - 新增律所简介入口并调整个人简介为页面整体滚动
This commit is contained in:
@@ -1,4 +1,12 @@
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<view class="action-dock">
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<view class="action-item" data-action="home" bindtap="handleAction">
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<text class="icon">所</text>
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<text>律所简介</text>
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</view>
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<view class="action-item" data-action="location" bindtap="handleAction">
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<text class="icon">导</text>
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<text>律所导航</text>
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</view>
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<view class="action-item" data-action="save" bindtap="handleAction">
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<text class="icon">存</text>
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<text>收下名片</text>
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@@ -7,8 +15,4 @@
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<text class="icon">享</text>
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<text>分享名片</text>
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</button>
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<view class="action-item" data-action="location" bindtap="handleAction">
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<text class="icon">导</text>
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<text>律所导航</text>
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</view>
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</view>
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@@ -175,12 +175,6 @@
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white-space: pre-wrap;
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}
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.bio-scroll {
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height: 360rpx;
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box-sizing: border-box;
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padding-right: 8rpx;
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}
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.firm-mini-card {
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background: #fff;
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padding: var(--spacing-md);
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@@ -232,6 +226,16 @@
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height: 160rpx;
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}
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.share-poster-canvas {
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position: fixed;
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left: -9999px;
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top: -9999px;
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width: 500px;
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height: 400px;
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opacity: 0;
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pointer-events: none;
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}
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.not-found-action {
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padding: var(--spacing-lg);
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text-align: center;
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@@ -1,7 +1,38 @@
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import { getLawyerDetail, recordCardShare } from '../../api/open';
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import type { FirmInfo } from '../../types/card';
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import type { Lawyer } from '../../types/card';
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import { getFirmProfile, getLawyerDetail, recordCardShare } from '../../api/open';
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import type { FirmInfo, Lawyer } from '../../types/card';
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import { appendCardViewRecord } from '../../utils/history';
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import { generateSharePoster, SHARE_POSTER_CANVAS_ID } from '../../utils/share-poster';
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interface DetailPageData {
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firm: FirmInfo;
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lawyer: Lawyer | null;
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notFound: boolean;
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specialtiesText: string;
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detailBgStyle: string;
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loading: boolean;
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sharePosterPath: string;
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}
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interface DetailPageCustom {
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handleDockAction(event: WechatMiniprogram.CustomEvent<{ action: string }>): void;
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saveContact(): void;
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callPhone(): void;
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navigateOffice(): void;
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previewWechatQr(): void;
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goFirmProfile(): void;
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goLawyerList(): void;
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getSharePosterCanvas(): Promise<WechatMiniprogram.Canvas>;
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loadFirmForShare(): Promise<FirmInfo>;
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prepareSharePoster(): void;
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ensureSharePoster(): Promise<string>;
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}
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type DetailPageInstance = WechatMiniprogram.Page.Instance<DetailPageData, DetailPageCustom>;
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const sharePosterPromiseMap = new WeakMap<DetailPageInstance, Promise<string>>();
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const shareFirmPromiseMap = new WeakMap<DetailPageInstance, Promise<FirmInfo>>();
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const shareCanvasPromiseMap = new WeakMap<DetailPageInstance, Promise<WechatMiniprogram.Canvas>>();
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const pageReadyMap = new WeakMap<DetailPageInstance, boolean>();
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function createEmptyFirm(): FirmInfo {
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return {
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@@ -29,29 +60,24 @@ function buildDetailBgStyle(coverImage?: string): string {
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return `background-image: url("${cover}"); background-size: cover; background-position: center;`;
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}
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function shouldUseBioScroll(bio?: string): boolean {
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const text = typeof bio === 'string' ? bio.trim() : '';
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return text.length > 180;
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}
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Page({
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Page<DetailPageData, DetailPageCustom>({
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data: {
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firm: createEmptyFirm(),
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lawyer: null as Lawyer | null,
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lawyer: null,
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notFound: false,
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specialtiesText: '',
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detailBgStyle: '',
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bioScrollable: false,
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loading: false,
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sharePosterPath: '',
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},
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async onLoad(options: Record<string, string | undefined>) {
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async onLoad(options) {
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const lawyerId = typeof options.id === 'string' ? options.id : '';
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const sourceType = typeof options.sourceType === 'string' ? options.sourceType : 'DIRECT';
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const shareFromCardId = typeof options.shareFromCardId === 'string' ? options.shareFromCardId : '';
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if (!lawyerId) {
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this.setData({ notFound: true, specialtiesText: '', detailBgStyle: '', bioScrollable: false });
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this.setData({ notFound: true, specialtiesText: '', detailBgStyle: '' });
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return;
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}
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@@ -64,13 +90,13 @@ Page({
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notFound: false,
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specialtiesText: payload.lawyer.specialties.join('；'),
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detailBgStyle: buildDetailBgStyle(payload.lawyer.coverImage),
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bioScrollable: shouldUseBioScroll(payload.lawyer.bio),
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});
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appendCardViewRecord(payload.lawyer);
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wx.showShareMenu({ menus: ['shareAppMessage'] });
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this.prepareSharePoster();
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} catch (error) {
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const message = error instanceof Error ? error.message : '律师信息不存在';
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this.setData({ notFound: true, specialtiesText: '', detailBgStyle: '', bioScrollable: false });
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this.setData({ notFound: true, specialtiesText: '', detailBgStyle: '' });
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wx.showToast({
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title: message,
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icon: 'none',
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@@ -80,9 +106,24 @@ Page({
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}
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},
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handleDockAction(event: WechatMiniprogram.CustomEvent<{ action: string }>) {
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onReady() {
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pageReadyMap.set(this, true);
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this.prepareSharePoster();
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},
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onUnload() {
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pageReadyMap.delete(this);
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sharePosterPromiseMap.delete(this);
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shareFirmPromiseMap.delete(this);
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shareCanvasPromiseMap.delete(this);
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},
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handleDockAction(event) {
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const action = event.detail.action;
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switch (action) {
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case 'home':
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this.goFirmProfile();
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break;
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case 'save':
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this.saveContact();
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break;
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@@ -137,6 +178,7 @@ Page({
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wx.showToast({ title: '暂未配置地图位置', icon: 'none' });
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return;
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}
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wx.openLocation({
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latitude: this.data.firm.hqLatitude,
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longitude: this.data.firm.hqLongitude,
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@@ -155,21 +197,166 @@ Page({
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wx.showToast({ title: '二维码未配置', icon: 'none' });
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return;
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}
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wx.previewImage({
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current: url,
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urls: [url],
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});
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},
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goFirmProfile() {
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wx.navigateTo({ url: '/pages/firm/index' });
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},
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goLawyerList() {
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wx.navigateTo({ url: '/pages/lawyer-list/index' });
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},
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onShareAppMessage() {
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async getSharePosterCanvas() {
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const cachedPromise = shareCanvasPromiseMap.get(this);
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if (cachedPromise) {
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return cachedPromise;
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}
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const canvasPromise = new Promise<WechatMiniprogram.Canvas>((resolve, reject) => {
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const query = wx.createSelectorQuery();
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query
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.in(this)
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.select(`#${SHARE_POSTER_CANVAS_ID}`)
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.node((result) => {
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const canvas = result && 'node' in result ? (result.node as WechatMiniprogram.Canvas | undefined) : undefined;
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if (canvas) {
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resolve(canvas);
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return;
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}
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reject(new Error('分享海报画布未就绪'));
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})
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.exec();
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}).then(
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(canvas) => {
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shareCanvasPromiseMap.delete(this);
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return canvas;
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},
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(error: unknown) => {
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shareCanvasPromiseMap.delete(this);
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throw error;
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}
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);
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shareCanvasPromiseMap.set(this, canvasPromise);
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return canvasPromise;
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},
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async loadFirmForShare() {
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const cachedPromise = shareFirmPromiseMap.get(this);
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if (cachedPromise) {
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return cachedPromise;
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}
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const currentFirm = this.data.firm;
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if (currentFirm.logo) {
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return currentFirm;
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}
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const firmPromise = getFirmProfile()
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.then((firmProfile) => ({
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...currentFirm,
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...firmProfile,
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name: firmProfile.name || currentFirm.name,
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hqAddress: currentFirm.hqAddress || firmProfile.hqAddress,
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}))
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.catch(() => currentFirm);
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const firmPromiseWithCleanup = firmPromise.then(
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(result) => {
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shareFirmPromiseMap.delete(this);
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return result;
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},
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(error: unknown) => {
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shareFirmPromiseMap.delete(this);
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throw error;
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}
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);
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shareFirmPromiseMap.set(this, firmPromiseWithCleanup);
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return firmPromiseWithCleanup;
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},
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prepareSharePoster() {
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if (!pageReadyMap.get(this) || !this.data.lawyer || this.data.notFound) {
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return;
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}
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this.ensureSharePoster().catch(() => {
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// 海报生成失败时使用默认头像兜底
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});
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},
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async ensureSharePoster() {
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if (this.data.sharePosterPath) {
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return this.data.sharePosterPath;
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}
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const currentPromise = sharePosterPromiseMap.get(this);
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if (currentPromise) {
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return currentPromise;
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}
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const lawyer = this.data.lawyer;
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if (!lawyer) {
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throw new Error('名片数据未就绪');
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}
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const posterPromise = this.loadFirmForShare()
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.then((firm) =>
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this.getSharePosterCanvas().then((canvas) =>
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generateSharePoster({
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canvas,
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firm: {
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name: firm.name,
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logo: firm.logo,
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hqAddress: firm.hqAddress,
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},
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lawyer: {
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name: lawyer.name,
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title: lawyer.title,
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office: lawyer.office,
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phone: lawyer.phone,
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email: lawyer.email,
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address: lawyer.address,
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avatar: lawyer.avatar,
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},
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})
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)
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)
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.then((posterPath) => {
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if (posterPath) {
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this.setData({ sharePosterPath: posterPath });
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}
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return posterPath;
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});
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const posterPromiseWithCleanup = posterPromise.then(
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(result) => {
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sharePosterPromiseMap.delete(this);
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return result;
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},
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(error: unknown) => {
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sharePosterPromiseMap.delete(this);
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throw error;
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}
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);
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sharePosterPromiseMap.set(this, posterPromiseWithCleanup);
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return posterPromiseWithCleanup;
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},
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onShareAppMessage() {
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const lawyer = this.data.lawyer;
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const firmName = this.data.firm.name || '电子名片';
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if (!lawyer) {
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return {
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title: `${this.data.firm.name || '电子名片'}电子名片`,
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title: firmName,
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path: '/pages/firm/index',
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};
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}
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@@ -179,10 +366,33 @@ Page({
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// 分享埋点失败不阻断分享动作
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});
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const title = firmName;
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const fallbackImage = lawyer.avatar;
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if (this.data.sharePosterPath) {
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return {
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title: `${lawyer.name}律师电子名片`,
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title,
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path: sharePath,
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imageUrl: lawyer.avatar,
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imageUrl: this.data.sharePosterPath,
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};
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}
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const promise = this.ensureSharePoster()
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.then((posterPath) => ({
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title,
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path: sharePath,
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imageUrl: posterPath || fallbackImage,
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}))
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.catch(() => ({
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title,
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path: sharePath,
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imageUrl: fallbackImage,
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}));
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return {
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title,
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path: sharePath,
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imageUrl: fallbackImage,
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promise,
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};
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},
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});
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@@ -61,10 +61,7 @@
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<!-- Bio -->
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<view class="section-card">
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<view class="section-header">个人简介</view>
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<scroll-view wx:if="{{bioScrollable}}" class="bio-scroll" scroll-y="true" show-scrollbar="true">
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<view class="bio-text">{{lawyer.bio}}</view>
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</scroll-view>
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<view wx:else class="bio-text">{{lawyer.bio}}</view>
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</view>
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@@ -73,6 +70,15 @@
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</view>
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</scroll-view>
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<canvas
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id="sharePosterCanvas"
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class="share-poster-canvas"
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canvas-id="sharePosterCanvas"
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disable-scroll="true"
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type="2d"
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style="width: 500px; height: 400px;"
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></canvas>
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<!-- Fixed Action Dock -->
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<action-dock bind:action="handleDockAction"></action-dock>
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</block>
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477
frontend_miniprogram/miniprogram/utils/share-poster.ts
Normal file
477
frontend_miniprogram/miniprogram/utils/share-poster.ts
Normal file
@@ -0,0 +1,477 @@
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import type { FirmInfo, Lawyer } from '../types/card';
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const POSTER_WIDTH = 500;
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const POSTER_HEIGHT = 400;
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const EXPORT_SCALE = 2;
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const EXPORT_WIDTH = POSTER_WIDTH * EXPORT_SCALE;
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const EXPORT_HEIGHT = POSTER_HEIGHT * EXPORT_SCALE;
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const BACKGROUND_COLOR = '#f4f0ee';
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const PRIMARY_COLOR = '#8E2230';
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const PRIMARY_DARK = '#5C0D15';
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const TEXT_MAIN = '#1A1A1A';
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type CanvasNode = WechatMiniprogram.Canvas;
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type Canvas2DContext = any;
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type CanvasImage = any;
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export const SHARE_POSTER_CANVAS_ID = 'sharePosterCanvas';
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export interface SharePosterPayload {
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canvas: CanvasNode;
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firm: Pick<FirmInfo, 'name' | 'logo' | 'hqAddress'>;
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lawyer: Pick<Lawyer, 'name' | 'title' | 'office' | 'phone' | 'email' | 'address' | 'avatar'>;
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}
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interface PosterAssets {
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avatarImage: CanvasImage | null;
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logoImage: CanvasImage | null;
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}
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interface ContactRow {
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kind: 'phone' | 'email' | 'address';
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value: string;
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maxLines: number;
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}
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interface MultilineTextOptions {
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x: number;
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y: number;
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maxWidth: number;
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lineHeight: number;
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maxLines: number;
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color: string;
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font: string;
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}
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function normalizeText(value: string | undefined | null): string {
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return typeof value === 'string' ? value.trim() : '';
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}
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function buildBrandInitial(name: string): string {
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const normalizedName = normalizeText(name);
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return normalizedName ? normalizedName.slice(0, 1) : '律';
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}
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function buildContactRows(payload: SharePosterPayload): ContactRow[] {
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const rows: ContactRow[] = [];
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const phone = normalizeText(payload.lawyer.phone);
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const email = normalizeText(payload.lawyer.email);
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const address = normalizeText(payload.lawyer.address) || normalizeText(payload.firm.hqAddress);
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if (phone) {
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rows.push({ kind: 'phone', value: phone, maxLines: 1 });
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}
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if (email) {
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rows.push({ kind: 'email', value: email, maxLines: 1 });
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}
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if (address) {
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rows.push({ kind: 'address', value: address, maxLines: 2 });
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}
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return rows;
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}
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function getImageInfo(src: string): Promise<string> {
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const normalizedSrc = normalizeText(src);
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if (!normalizedSrc) {
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return Promise.resolve('');
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}
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return new Promise((resolve) => {
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wx.getImageInfo({
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src: normalizedSrc,
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success: (result) => {
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resolve(result.path || normalizedSrc);
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},
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fail: () => {
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resolve('');
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},
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});
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});
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}
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||||
|
||||
function loadCanvasImage(canvas: CanvasNode, src: string): Promise<CanvasImage | null> {
|
||||
const normalizedSrc = normalizeText(src);
|
||||
if (!normalizedSrc) {
|
||||
return Promise.resolve(null);
|
||||
}
|
||||
|
||||
return new Promise((resolve) => {
|
||||
const image = canvas.createImage();
|
||||
image.onload = () => resolve(image);
|
||||
image.onerror = () => resolve(null);
|
||||
image.src = normalizedSrc;
|
||||
});
|
||||
}
|
||||
|
||||
async function preloadAssets(payload: SharePosterPayload): Promise<PosterAssets> {
|
||||
const [avatarPath, logoPath] = await Promise.all([
|
||||
getImageInfo(payload.lawyer.avatar),
|
||||
getImageInfo(payload.firm.logo),
|
||||
]);
|
||||
const [avatarImage, logoImage] = await Promise.all([
|
||||
loadCanvasImage(payload.canvas, avatarPath),
|
||||
loadCanvasImage(payload.canvas, logoPath),
|
||||
]);
|
||||
|
||||
return {
|
||||
avatarImage,
|
||||
logoImage,
|
||||
};
|
||||
}
|
||||
|
||||
function createRoundedRectPath(
|
||||
ctx: Canvas2DContext,
|
||||
x: number,
|
||||
y: number,
|
||||
width: number,
|
||||
height: number,
|
||||
radius: number
|
||||
) {
|
||||
const safeRadius = Math.min(radius, width / 2, height / 2);
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(x + safeRadius, y);
|
||||
ctx.lineTo(x + width - safeRadius, y);
|
||||
ctx.arcTo(x + width, y, x + width, y + safeRadius, safeRadius);
|
||||
ctx.lineTo(x + width, y + height - safeRadius);
|
||||
ctx.arcTo(x + width, y + height, x + width - safeRadius, y + height, safeRadius);
|
||||
ctx.lineTo(x + safeRadius, y + height);
|
||||
ctx.arcTo(x, y + height, x, y + height - safeRadius, safeRadius);
|
||||
ctx.lineTo(x, y + safeRadius);
|
||||
ctx.arcTo(x, y, x + safeRadius, y, safeRadius);
|
||||
ctx.closePath();
|
||||
}
|
||||
|
||||
function fillRoundedRect(
|
||||
ctx: Canvas2DContext,
|
||||
x: number,
|
||||
y: number,
|
||||
width: number,
|
||||
height: number,
|
||||
radius: number,
|
||||
color: string
|
||||
) {
|
||||
createRoundedRectPath(ctx, x, y, width, height, radius);
|
||||
ctx.fillStyle = color;
|
||||
ctx.fill();
|
||||
}
|
||||
|
||||
function clipRoundedImage(
|
||||
ctx: Canvas2DContext,
|
||||
image: CanvasImage,
|
||||
x: number,
|
||||
y: number,
|
||||
width: number,
|
||||
height: number,
|
||||
radius: number
|
||||
) {
|
||||
ctx.save();
|
||||
createRoundedRectPath(ctx, x, y, width, height, radius);
|
||||
ctx.clip();
|
||||
ctx.drawImage(image, x, y, width, height);
|
||||
ctx.restore();
|
||||
}
|
||||
|
||||
function drawPhoneIcon(ctx: Canvas2DContext, x: number, y: number) {
|
||||
ctx.save();
|
||||
ctx.strokeStyle = PRIMARY_DARK;
|
||||
ctx.lineWidth = 1.8;
|
||||
ctx.lineCap = 'round';
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(x + 5, y + 8);
|
||||
ctx.quadraticCurveTo(x + 4, y + 10, x + 6, y + 13);
|
||||
ctx.lineTo(x + 9, y + 16);
|
||||
ctx.quadraticCurveTo(x + 11, y + 18, x + 13, y + 17);
|
||||
ctx.lineTo(x + 15, y + 15);
|
||||
ctx.quadraticCurveTo(x + 16.5, y + 13.5, x + 15.5, y + 12);
|
||||
ctx.lineTo(x + 13.5, y + 10);
|
||||
ctx.quadraticCurveTo(x + 12, y + 8.5, x + 10.5, y + 9.5);
|
||||
ctx.lineTo(x + 9.5, y + 10.5);
|
||||
ctx.quadraticCurveTo(x + 8.5, y + 11.5, x + 7.5, y + 10.5);
|
||||
ctx.lineTo(x + 6.5, y + 9.5);
|
||||
ctx.quadraticCurveTo(x + 5.5, y + 8.5, x + 6.5, y + 7.5);
|
||||
ctx.lineTo(x + 7.5, y + 6.5);
|
||||
ctx.quadraticCurveTo(x + 8.5, y + 5, x + 7, y + 3.5);
|
||||
ctx.lineTo(x + 5, y + 1.5);
|
||||
ctx.quadraticCurveTo(x + 3.5, y, x + 2.5, y + 2);
|
||||
ctx.lineTo(x + 1.5, y + 4);
|
||||
ctx.quadraticCurveTo(x + 0.5, y + 6, x + 2.5, y + 7.5);
|
||||
ctx.stroke();
|
||||
ctx.restore();
|
||||
}
|
||||
|
||||
function drawEmailIcon(ctx: Canvas2DContext, x: number, y: number) {
|
||||
ctx.save();
|
||||
ctx.strokeStyle = PRIMARY_DARK;
|
||||
ctx.lineWidth = 1.6;
|
||||
ctx.lineJoin = 'round';
|
||||
createRoundedRectPath(ctx, x + 1, y + 3, 18, 14, 4);
|
||||
ctx.stroke();
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(x + 3.5, y + 5.5);
|
||||
ctx.lineTo(x + 10, y + 11);
|
||||
ctx.lineTo(x + 16.5, y + 5.5);
|
||||
ctx.stroke();
|
||||
ctx.restore();
|
||||
}
|
||||
|
||||
function drawAddressIcon(ctx: Canvas2DContext, x: number, y: number) {
|
||||
ctx.save();
|
||||
ctx.strokeStyle = PRIMARY_DARK;
|
||||
ctx.lineWidth = 1.6;
|
||||
ctx.lineJoin = 'round';
|
||||
ctx.lineCap = 'round';
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(x + 10, y + 18);
|
||||
ctx.bezierCurveTo(x + 15, y + 12.5, x + 17, y + 9.5, x + 17, y + 7);
|
||||
ctx.arc(x + 10, y + 7, 7, 0, Math.PI, true);
|
||||
ctx.bezierCurveTo(x + 3, y + 9.5, x + 5, y + 12.5, x + 10, y + 18);
|
||||
ctx.stroke();
|
||||
ctx.beginPath();
|
||||
ctx.arc(x + 10, y + 7, 2.3, 0, Math.PI * 2);
|
||||
ctx.stroke();
|
||||
ctx.restore();
|
||||
}
|
||||
|
||||
function drawContactIcon(ctx: Canvas2DContext, kind: ContactRow['kind'], x: number, y: number) {
|
||||
fillRoundedRect(ctx, x, y, 28, 28, 14, 'rgba(142,34,48,0.07)');
|
||||
if (kind === 'phone') {
|
||||
drawPhoneIcon(ctx, x + 6, y + 5);
|
||||
return;
|
||||
}
|
||||
if (kind === 'email') {
|
||||
drawEmailIcon(ctx, x + 4, y + 4);
|
||||
return;
|
||||
}
|
||||
drawAddressIcon(ctx, x + 4, y + 4);
|
||||
}
|
||||
|
||||
function buildWrappedLines(
|
||||
ctx: Canvas2DContext,
|
||||
text: string,
|
||||
maxWidth: number,
|
||||
maxLines: number
|
||||
): { lines: string[]; truncated: boolean } {
|
||||
const normalizedText = normalizeText(text);
|
||||
if (!normalizedText) {
|
||||
return { lines: [], truncated: false };
|
||||
}
|
||||
|
||||
const paragraphs = normalizedText.split(/\n+/).filter(Boolean);
|
||||
const lines: string[] = [];
|
||||
let truncated = false;
|
||||
|
||||
for (let paragraphIndex = 0; paragraphIndex < paragraphs.length; paragraphIndex += 1) {
|
||||
const paragraph = paragraphs[paragraphIndex];
|
||||
let currentLine = '';
|
||||
|
||||
for (let index = 0; index < paragraph.length; index += 1) {
|
||||
const nextLine = `${currentLine}${paragraph[index]}`;
|
||||
if (ctx.measureText(nextLine).width <= maxWidth) {
|
||||
currentLine = nextLine;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (currentLine) {
|
||||
lines.push(currentLine);
|
||||
}
|
||||
currentLine = paragraph[index];
|
||||
|
||||
if (lines.length >= maxLines) {
|
||||
truncated = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (lines.length >= maxLines) {
|
||||
truncated = true;
|
||||
break;
|
||||
}
|
||||
|
||||
if (currentLine) {
|
||||
lines.push(currentLine);
|
||||
}
|
||||
}
|
||||
|
||||
const finalLines = lines.slice(0, maxLines);
|
||||
if (truncated && finalLines.length > 0) {
|
||||
let lastLine = finalLines[finalLines.length - 1];
|
||||
while (lastLine && ctx.measureText(`${lastLine}...`).width > maxWidth) {
|
||||
lastLine = lastLine.slice(0, -1);
|
||||
}
|
||||
finalLines[finalLines.length - 1] = `${lastLine}...`;
|
||||
}
|
||||
|
||||
return { lines: finalLines, truncated };
|
||||
}
|
||||
|
||||
function drawMultilineText(
|
||||
ctx: Canvas2DContext,
|
||||
text: string,
|
||||
options: MultilineTextOptions
|
||||
): number {
|
||||
const normalizedText = normalizeText(text);
|
||||
if (!normalizedText) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
ctx.fillStyle = options.color;
|
||||
ctx.font = options.font;
|
||||
ctx.textAlign = 'left';
|
||||
ctx.textBaseline = 'top';
|
||||
const { lines: finalLines } = buildWrappedLines(ctx, normalizedText, options.maxWidth, options.maxLines);
|
||||
|
||||
finalLines.forEach((line, index) => {
|
||||
ctx.fillText(line, options.x, options.y + index * options.lineHeight);
|
||||
});
|
||||
|
||||
return finalLines.length * options.lineHeight;
|
||||
}
|
||||
|
||||
function drawBackground(ctx: Canvas2DContext) {
|
||||
const gradient = ctx.createLinearGradient(0, 0, POSTER_WIDTH, POSTER_HEIGHT);
|
||||
gradient.addColorStop(0, '#fbf8f6');
|
||||
gradient.addColorStop(1, BACKGROUND_COLOR);
|
||||
|
||||
ctx.fillStyle = gradient;
|
||||
ctx.fillRect(0, 0, POSTER_WIDTH, POSTER_HEIGHT);
|
||||
|
||||
ctx.save();
|
||||
ctx.globalAlpha = 0.14;
|
||||
const ribbonGradient = ctx.createLinearGradient(80, 0, 360, 240);
|
||||
ribbonGradient.addColorStop(0, '#c9929b');
|
||||
ribbonGradient.addColorStop(1, '#8E2230');
|
||||
ctx.fillStyle = ribbonGradient;
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(220, 0);
|
||||
ctx.lineTo(POSTER_WIDTH, 0);
|
||||
ctx.lineTo(POSTER_WIDTH, 180);
|
||||
ctx.lineTo(340, 280);
|
||||
ctx.closePath();
|
||||
ctx.fill();
|
||||
ctx.restore();
|
||||
|
||||
ctx.save();
|
||||
ctx.globalAlpha = 0.08;
|
||||
ctx.fillStyle = PRIMARY_DARK;
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(0, 220);
|
||||
ctx.lineTo(110, 150);
|
||||
ctx.lineTo(180, 190);
|
||||
ctx.lineTo(0, 340);
|
||||
ctx.closePath();
|
||||
ctx.fill();
|
||||
ctx.restore();
|
||||
}
|
||||
|
||||
function drawHeaderSection(ctx: Canvas2DContext, payload: SharePosterPayload, assets: PosterAssets): number {
|
||||
const avatarX = 46;
|
||||
const avatarY = 62;
|
||||
const avatarSize = 108;
|
||||
|
||||
if (assets.avatarImage) {
|
||||
clipRoundedImage(ctx, assets.avatarImage, avatarX, avatarY, avatarSize, avatarSize, 20);
|
||||
} else {
|
||||
fillRoundedRect(ctx, avatarX, avatarY, avatarSize, avatarSize, 20, 'rgba(142,34,48,0.12)');
|
||||
ctx.fillStyle = PRIMARY_COLOR;
|
||||
ctx.font = '600 28px sans-serif';
|
||||
ctx.textAlign = 'center';
|
||||
ctx.textBaseline = 'middle';
|
||||
ctx.fillText(buildBrandInitial(payload.lawyer.name), avatarX + avatarSize / 2, avatarY + avatarSize / 2);
|
||||
}
|
||||
|
||||
const infoX = 176;
|
||||
ctx.textAlign = 'left';
|
||||
ctx.textBaseline = 'top';
|
||||
ctx.fillStyle = TEXT_MAIN;
|
||||
ctx.font = '600 35px sans-serif';
|
||||
ctx.fillText(payload.lawyer.name || '未命名律师', infoX, 80);
|
||||
|
||||
ctx.fillStyle = PRIMARY_COLOR;
|
||||
ctx.font = '600 20px sans-serif';
|
||||
ctx.fillText(payload.lawyer.title || '律师', infoX, 128);
|
||||
|
||||
return 226;
|
||||
}
|
||||
|
||||
function drawContactRows(ctx: Canvas2DContext, rows: ContactRow[], startY: number): number {
|
||||
let currentY = startY;
|
||||
|
||||
rows.forEach((row, index) => {
|
||||
ctx.save();
|
||||
if (index > 0) {
|
||||
ctx.strokeStyle = 'rgba(142,34,48,0.08)';
|
||||
ctx.lineWidth = 1;
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(96, currentY - 12);
|
||||
ctx.lineTo(430, currentY - 12);
|
||||
ctx.stroke();
|
||||
}
|
||||
|
||||
drawContactIcon(ctx, row.kind, 52, currentY - 3);
|
||||
|
||||
const usedHeight = drawMultilineText(ctx, row.value, {
|
||||
x: 98,
|
||||
y: currentY - 1,
|
||||
maxWidth: 334,
|
||||
lineHeight: row.maxLines > 1 ? 24 : 22,
|
||||
maxLines: row.maxLines,
|
||||
color: TEXT_MAIN,
|
||||
font: row.maxLines > 1 ? '500 16px sans-serif' : '600 18px sans-serif',
|
||||
});
|
||||
|
||||
currentY += Math.max(usedHeight, 30) + 18;
|
||||
ctx.restore();
|
||||
});
|
||||
|
||||
return currentY;
|
||||
}
|
||||
|
||||
function drawPoster(ctx: Canvas2DContext, payload: SharePosterPayload, assets: PosterAssets) {
|
||||
drawBackground(ctx);
|
||||
const contactRows = buildContactRows(payload);
|
||||
const contactStartY = 234;
|
||||
drawHeaderSection(ctx, payload, assets);
|
||||
drawContactRows(ctx, contactRows, contactStartY);
|
||||
}
|
||||
|
||||
function configureCanvas(canvas: CanvasNode): Canvas2DContext {
|
||||
const context = canvas.getContext('2d') as Canvas2DContext;
|
||||
canvas.width = EXPORT_WIDTH;
|
||||
canvas.height = EXPORT_HEIGHT;
|
||||
if (typeof context.setTransform === 'function') {
|
||||
context.setTransform(1, 0, 0, 1, 0, 0);
|
||||
}
|
||||
context.clearRect(0, 0, EXPORT_WIDTH, EXPORT_HEIGHT);
|
||||
context.scale(EXPORT_SCALE, EXPORT_SCALE);
|
||||
return context;
|
||||
}
|
||||
|
||||
function exportCanvas(canvas: CanvasNode): Promise<string> {
|
||||
return new Promise((resolve, reject) => {
|
||||
wx.canvasToTempFilePath({
|
||||
canvas,
|
||||
x: 0,
|
||||
y: 0,
|
||||
width: POSTER_WIDTH,
|
||||
height: POSTER_HEIGHT,
|
||||
destWidth: EXPORT_WIDTH,
|
||||
destHeight: EXPORT_HEIGHT,
|
||||
fileType: 'jpg',
|
||||
quality: 0.92,
|
||||
success: (result) => {
|
||||
resolve(result.tempFilePath);
|
||||
},
|
||||
fail: () => {
|
||||
reject(new Error('分享海报导出失败'));
|
||||
},
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
export async function generateSharePoster(payload: SharePosterPayload): Promise<string> {
|
||||
const ctx = configureCanvas(payload.canvas);
|
||||
const assets = await preloadAssets(payload);
|
||||
drawPoster(ctx, payload, assets);
|
||||
return exportCanvas(payload.canvas);
|
||||
}
|
||||
Reference in New Issue
Block a user