import _app from './app.js';
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import QRCodeAlg from './QRCodeAlg.js';
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const ShreUserPosterBackgroundKey = 'ShrePosterBackground_'; // 背景图片缓存名称前缀
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const idKey = 'QSSHAREPOSTER_IDKEY'; //drawArray自动生成的idkey
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var isMp = false;
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// #ifdef MP
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isMp = true;
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// #endif
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|
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// export default
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function getSharePoster(obj) {
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return new Promise(async (resolve, reject) => {
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try {
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const result1 = await returnPromise(obj);
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resolve(result1);
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} catch (e) {
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//TODO handle the exception
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removePosterStorage(obj.type);
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try {
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_app.log('------------清除缓存后, 开始第二次尝试------------');
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const result2 = await returnPromise(obj);
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resolve(result2);
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} catch (e) {
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//TODO handle the exception
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reject(e);
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}
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}
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})
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}
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function returnPromise(obj) {
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let {
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type,
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formData,
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background,
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posterCanvasId,
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backgroundImage,
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reserve,
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textArray,
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drawArray,
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qrCodeArray,
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imagesArray,
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setCanvasWH,
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setCanvasToTempFilePath,
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setDraw,
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bgScale,
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Context,
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_this,
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delayTimeScale,
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drawDelayTime
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} = obj;
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return new Promise(async (rs, rj) => {
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try {
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_app.showLoading('正在准备海报数据');
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if (!Context) {
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_app.log('没有画布对象,创建画布对象');
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Context = uni.createCanvasContext(posterCanvasId, (_this || null));
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}
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let bgObj;
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if (background && background.width && background.height) {
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bgObj = background;
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} else {
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bgObj = await getShreUserPosterBackground({
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backgroundImage,
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type,
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formData
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});
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}
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// 为了ios 缩放一些
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bgScale = bgScale || .75;
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bgObj.width = bgObj.width * bgScale;
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bgObj.height = bgObj.height * bgScale;
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_app.log('获取背景图信息对象成功:' + JSON.stringify(bgObj));
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const params = {
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bgObj,
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type,
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bgScale
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};
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if (setCanvasWH && typeof(setCanvasWH) == 'function') setCanvasWH(params);
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if (imagesArray) {
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if (typeof(imagesArray) == 'function')
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imagesArray = imagesArray(params);
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_app.showLoading('正在生成需绘制图片的临时路径');
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_app.log('准备设置图片');
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imagesArray = await setImage(imagesArray);
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_app.hideLoading();
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}
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if (textArray) {
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if (typeof(textArray) == 'function')
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textArray = textArray(params);
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textArray = setText(Context, textArray);
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}
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if (qrCodeArray) {
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if (typeof(qrCodeArray) == 'function')
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qrCodeArray = qrCodeArray(params);
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_app.showLoading('正在生成需绘制图片的临时路径');
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for (let i = 0; i < qrCodeArray.length; i++) {
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_app.log(i);
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if (qrCodeArray[i].image)
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qrCodeArray[i].image = await _app.downloadFile_PromiseFc(qrCodeArray[i].image);
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}
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_app.hideLoading();
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}
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if (drawArray) {
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if (typeof(drawArray) == 'function') {
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drawArray = drawArray(params);
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}
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if (_app.isPromise(drawArray)) {
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drawArray = await drawArray;
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}
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if (_app.isArray(drawArray) && drawArray.length > 0) {
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let hasAllInfoCallback = false;
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for (let i = 0; i < drawArray.length; i++) {
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const drawArrayItem = drawArray[i];
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if (_app.isFn(drawArrayItem.allInfoCallback) && !hasAllInfoCallback) hasAllInfoCallback = true;
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drawArrayItem[idKey] = i;
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let newData;
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switch (drawArrayItem.type) {
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case 'image':
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newData = await setImage(drawArrayItem);
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break;
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case 'text':
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newData = setText(Context, drawArrayItem);
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break;
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case 'qrcode':
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if (drawArrayItem.image)
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newData = {
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image: await _app.downloadFile_PromiseFc(drawArrayItem.image)
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};
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break;
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case 'custom':
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break;
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default:
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_app.log('未识别的类型');
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break;
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}
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if (newData && _app.isObject(newData)) {
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drawArray[i] = { ...drawArrayItem,
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...newData
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}
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};
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}
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if (hasAllInfoCallback) {
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_app.log('----------------hasAllInfoCallback----------------');
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const drawArray_copy = [...drawArray];
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drawArray_copy.sort((a, b) => {
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const a_serialNum = !_app.isUndef(a.serialNum) && !_app.isNull(a.serialNum) ? Number(a.serialNum) : Number.NEGATIVE_INFINITY;
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const b_serialNum = !_app.isUndef(b.serialNum) && !_app.isNull(b.serialNum) ? Number(b.serialNum) : Number.NEGATIVE_INFINITY;
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return a_serialNum - b_serialNum;
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})
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for (let i = 0; i < drawArray_copy.length; i++) {
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const item = { ...drawArray_copy[i]
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};
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if (_app.isFn(item.allInfoCallback)) {
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let newData = item.allInfoCallback({
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drawArray: drawArray_copy
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});
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if (_app.isPromise(newData)) newData = await newData;
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const item_idKey = item[idKey];
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if (!_app.isUndef(item_idKey)) {
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drawArray[item[idKey]] = { ...item,
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...newData
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};
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} else {
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console.log('程序错误 找不到idKey!!! ...这不应该啊');
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}
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}
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}
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}
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}
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}
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const poster = await drawShareImage({
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Context,
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type,
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posterCanvasId,
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reserve,
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drawArray,
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textArray,
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imagesArray,
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bgObj,
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qrCodeArray,
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setCanvasToTempFilePath,
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setDraw,
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bgScale,
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_this,
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delayTimeScale,
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drawDelayTime
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});
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_app.hideLoading();
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rs({
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bgObj,
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poster,
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type
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});
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} catch (e) {
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//TODO handle the exception
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rj(e);
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}
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});
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}
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function drawShareImage(obj) { //绘制海报方法
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let {
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Context,
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type,
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posterCanvasId,
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reserve,
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bgObj,
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drawArray,
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textArray,
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qrCodeArray,
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imagesArray,
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setCanvasToTempFilePath,
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setDraw,
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bgScale,
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_this,
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delayTimeScale,
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drawDelayTime
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} = obj;
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const params = {
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Context,
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bgObj,
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type,
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bgScale
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};
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delayTimeScale = delayTimeScale !== undefined ? delayTimeScale : 15;
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drawDelayTime = drawDelayTime !== undefined ? drawDelayTime : 100;
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return new Promise((rs, rj) => {
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try {
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_app.showLoading('正在绘制海报');
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_app.log('背景对象:' + JSON.stringify(bgObj));
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if (bgObj && bgObj.path) {
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_app.log('背景有图片路径');
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Context.drawImage(bgObj.path, 0, 0, bgObj.width, bgObj.height);
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} else {
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_app.log('背景没有图片路径');
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if (bgObj.backgroundColor) {
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_app.log('背景有背景颜色:' + bgObj.backgroundColor);
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Context.setFillStyle(bgObj.backgroundColor);
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Context.fillRect(0, 0, bgObj.width, bgObj.height);
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} else {
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_app.log('背景没有背景颜色');
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}
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}
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_app.showLoading('绘制图片');
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if (imagesArray && imagesArray.length > 0)
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drawImage(Context, imagesArray);
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_app.showLoading('绘制自定义内容');
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if (setDraw && typeof(setDraw) == 'function') setDraw(params);
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_app.showLoading('绘制文本');
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if (textArray && textArray.length > 0)
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drawText(Context, textArray, bgObj);
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_app.showLoading('绘制二维码');
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if (qrCodeArray && qrCodeArray.length > 0) {
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for (let i = 0; i < qrCodeArray.length; i++) {
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drawQrCode(Context, qrCodeArray[i]);
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}
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}
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_app.showLoading('绘制可控层级序列');
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if (drawArray && drawArray.length > 0) {
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for (let i = 0; i < drawArray.length; i++) {
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const drawArrayItem = drawArray[i];
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_app.log('绘制可控层级序列, drawArrayItem:' + JSON.stringify(drawArrayItem));
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switch (drawArrayItem.type) {
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case 'image':
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_app.log('绘制可控层级序列, 绘制图片');
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drawImage(Context, drawArrayItem);
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break;
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case 'text':
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_app.log('绘制可控层级序列, 绘制文本');
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drawText(Context, drawArrayItem, bgObj);
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break;
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case 'qrcode':
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_app.log('绘制可控层级序列, 绘制二维码');
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drawQrCode(Context, drawArrayItem);
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break;
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case 'custom':
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_app.log('绘制可控层级序列, 绘制自定义内容');
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if (drawArrayItem.setDraw && typeof drawArrayItem.setDraw === 'function')
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drawArrayItem.setDraw(Context);
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break;
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default:
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_app.log('未识别的类型');
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break;
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}
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}
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}
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_app.showLoading('绘制中')
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setTimeout(() => {
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Context.draw((typeof(reserve) == 'boolean' ? reserve : false), function(){
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_app.showLoading('正在输出图片');
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let setObj = setCanvasToTempFilePath || {};
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if (setObj && typeof(setObj) == 'function')
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setObj = setCanvasToTempFilePath(bgObj, type);
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let canvasToTempFilePathFn;
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// #ifdef H5
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canvasToTempFilePathFn = function() {
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_app.hideLoading();
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rs({
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tempFilePath: document.querySelector(`uni-canvas[canvas-id=${posterCanvasId}]>canvas`).toDataURL(
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'image/jpeg', setObj.quality || .8)
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});
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}
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// #endif
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// #ifndef H5
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const data = {
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x: 0,
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y: 0,
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width: bgObj.width,
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height: bgObj.height,
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destWidth: bgObj.width * 2, // 若H5使用这里请不要乘以二
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destHeight: bgObj.height * 2, // 若H5使用这里请不要乘以二
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quality: .8,
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fileType: 'jpg',
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...setObj
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};
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_app.log('canvasToTempFilePath的data对象:' + JSON.stringify(data));
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canvasToTempFilePathFn = function() {
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const toTempFilePathObj = { //输出为图片
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...data,
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canvasId: posterCanvasId,
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success(res) {
|
_app.hideLoading();
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rs(res);
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},
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fail(err) {
|
_app.hideLoading();
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_app.log('输出图片失败:' + JSON.stringify(err));
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rj('输出图片失败:' + JSON.stringify(err))
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}
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}
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uni.canvasToTempFilePath(toTempFilePathObj, _this || null);
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}
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// #endif
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let delayTime = 0;
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if (qrCodeArray) {
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qrCodeArray.forEach(item => {
|
if (item.text) {
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delayTime += Number(item.text.length);
|
}
|
})
|
}
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if (imagesArray) {
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imagesArray.forEach(() => {
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delayTime += delayTimeScale;
|
})
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}
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if (textArray) {
|
textArray.forEach(() => {
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delayTime += delayTimeScale;
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})
|
}
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if (drawArray) {
|
drawArray.forEach(item => {
|
switch (item.type) {
|
case 'text':
|
if (item.text) {
|
delayTime += item.text.length;
|
}
|
break;
|
default:
|
delayTime += delayTimeScale;
|
break;
|
}
|
})
|
}
|
_app.log('延时系数:' + delayTimeScale);
|
_app.log('总计延时:' + delayTime);
|
setTimeout(canvasToTempFilePathFn, delayTime);
|
});
|
}, drawDelayTime);
|
} catch (e) {
|
//TODO handle the exception
|
_app.hideLoading();
|
rj(e);
|
}
|
});
|
}
|
|
// export
|
function setText(Context, texts) { // 设置文本数据
|
_app.log('进入设置文字方法, texts:' + JSON.stringify(texts));
|
if (texts && _app.isArray(texts)) {
|
_app.log('texts是数组');
|
if (texts.length > 0) {
|
for (let i = 0; i < texts.length; i++) {
|
_app.log('字符串信息-初始化之前:' + JSON.stringify(texts[i]));
|
texts[i] = setTextFn(Context, texts[i]);
|
}
|
}
|
} else {
|
_app.log('texts是对象');
|
texts = setTextFn(Context, texts);
|
}
|
_app.log('返回texts:' + JSON.stringify(texts));
|
return texts;
|
}
|
|
function setTextFn(Context, textItem) {
|
_app.log('进入设置文字方法, textItem:' + JSON.stringify(textItem));
|
if (_app.isNotNull_string(textItem.text)) {
|
textItem.text = String(textItem.text);
|
textItem.alpha = textItem.alpha !== undefined ? textItem.alpha : 1;
|
textItem.color = textItem.color || 'black';
|
textItem.size = textItem.size !== undefined ? textItem.size : 10;
|
textItem.textAlign = textItem.textAlign || 'left';
|
textItem.textBaseline = textItem.textBaseline || 'middle';
|
textItem.dx = textItem.dx || 0;
|
textItem.dy = textItem.dy || 0;
|
textItem.size = Math.ceil(Number(textItem.size));
|
_app.log('字符串信息-初始化默认值后:' + JSON.stringify(textItem));
|
const textLength = countTextLength(Context, {
|
text: textItem.text,
|
size: textItem.size
|
});
|
_app.log('字符串信息-初始化时的文本长度:' + textLength);
|
let infoCallBackObj = {};
|
if (textItem.infoCallBack && typeof(textItem.infoCallBack) === 'function') {
|
infoCallBackObj = textItem.infoCallBack(textLength);
|
}
|
textItem = {
|
...textItem,
|
textLength,
|
...infoCallBackObj
|
}
|
_app.log('字符串信息-infoCallBack后:' + JSON.stringify(textItem));
|
}
|
return textItem;
|
}
|
|
function countTextLength(Context, obj) {
|
_app.log('计算文字长度, obj:' + JSON.stringify(obj));
|
const {
|
text,
|
size
|
} = obj;
|
Context.setFontSize(size);
|
let textLength;
|
/* try{
|
textLength = Context.measureText(text); // 官方文档说 App端自定义组件编译模式暂时不可用measureText方法
|
}catch(e){
|
//TODO handle the exception
|
textLength = {};
|
} */
|
textLength = {};
|
_app.log('measureText计算文字长度, textLength:' + JSON.stringify(textLength));
|
textLength = textLength && textLength.width ? textLength.width : 0;
|
if (!textLength) {
|
let l = 0;
|
for (let j = 0; j < text.length; j++) {
|
let t = text.substr(j, 1);
|
const countL = countStrLength(t);
|
_app.log('计算文字宽度系数:' + countL);
|
l += countL;
|
}
|
_app.log('文字宽度总系数:' + l);
|
textLength = l * size;
|
}
|
return textLength;
|
}
|
|
//计算字符长度系数
|
function countStrLength(t) {
|
let l;
|
if (/a/.test(t)) {
|
l = 0.552734375
|
} else if (/b/.test(t)) {
|
l = 0.638671875
|
} else if (/c/.test(t)) {
|
l = 0.50146484375
|
} else if (/d/.test(t)) {
|
l = 0.6396484375
|
} else if (/e/.test(t)) {
|
l = 0.5673828125
|
} else if (/f/.test(t)) {
|
l = 0.3466796875
|
} else if (/g/.test(t)) {
|
l = 0.6396484375
|
} else if (/h/.test(t)) {
|
l = 0.61572265625
|
} else if (/i/.test(t)) {
|
l = 0.26611328125
|
} else if (/j/.test(t)) {
|
l = 0.26708984375
|
} else if (/k/.test(t)) {
|
l = 0.54443359375
|
} else if (/l/.test(t)) {
|
l = 0.26611328125
|
} else if (/m/.test(t)) {
|
l = 0.93701171875
|
} else if (/n/.test(t)) {
|
l = 0.6162109375
|
} else if (/o/.test(t)) {
|
l = 0.6357421875
|
} else if (/p/.test(t)) {
|
l = 0.638671875
|
} else if (/q/.test(t)) {
|
l = 0.6396484375
|
} else if (/r/.test(t)) {
|
l = 0.3818359375
|
} else if (/s/.test(t)) {
|
l = 0.462890625
|
} else if (/t/.test(t)) {
|
l = 0.37255859375
|
} else if (/u/.test(t)) {
|
l = 0.6162109375
|
} else if (/v/.test(t)) {
|
l = 0.52490234375
|
} else if (/w/.test(t)) {
|
l = 0.78955078125
|
} else if (/x/.test(t)) {
|
l = 0.5068359375
|
} else if (/y/.test(t)) {
|
l = 0.529296875
|
} else if (/z/.test(t)) {
|
l = 0.49169921875
|
} else if (/A/.test(t)) {
|
l = 0.70361328125
|
} else if (/B/.test(t)) {
|
l = 0.62744140625
|
} else if (/C/.test(t)) {
|
l = 0.6689453125
|
} else if (/D/.test(t)) {
|
l = 0.76171875
|
} else if (/E/.test(t)) {
|
l = 0.5498046875
|
} else if (/F/.test(t)) {
|
l = 0.53125
|
} else if (/G/.test(t)) {
|
l = 0.74365234375
|
} else if (/H/.test(t)) {
|
l = 0.7734375
|
} else if (/I/.test(t)) {
|
l = 0.2939453125
|
} else if (/J/.test(t)) {
|
l = 0.39599609375
|
} else if (/K/.test(t)) {
|
l = 0.634765625
|
} else if (/L/.test(t)) {
|
l = 0.51318359375
|
} else if (/M/.test(t)) {
|
l = 0.97705078125
|
} else if (/N/.test(t)) {
|
l = 0.81298828125
|
} else if (/O/.test(t)) {
|
l = 0.81494140625
|
} else if (/P/.test(t)) {
|
l = 0.61181640625
|
} else if (/Q/.test(t)) {
|
l = 0.81494140625
|
} else if (/R/.test(t)) {
|
l = 0.65283203125
|
} else if (/S/.test(t)) {
|
l = 0.5771484375
|
} else if (/T/.test(t)) {
|
l = 0.5732421875
|
} else if (/U/.test(t)) {
|
l = 0.74658203125
|
} else if (/V/.test(t)) {
|
l = 0.67626953125
|
} else if (/W/.test(t)) {
|
l = 1.017578125
|
} else if (/X/.test(t)) {
|
l = 0.64501953125
|
} else if (/Y/.test(t)) {
|
l = 0.603515625
|
} else if (/Z/.test(t)) {
|
l = 0.6201171875
|
} else if (/[0-9]/.test(t)) {
|
l = 0.58642578125
|
} else if (/[\u4e00-\u9fa5]/.test(t)) {
|
l = 1
|
} else if (/ /.test(t)) {
|
l = 0.2958984375
|
} else if (/\`/.test(t)) {
|
l = 0.294921875
|
} else if (/\~/.test(t)) {
|
l = 0.74169921875
|
} else if (/\!/.test(t)) {
|
l = 0.3125
|
} else if (/\@/.test(t)) {
|
l = 1.03125
|
} else if (/\#/.test(t)) {
|
l = 0.63818359375
|
} else if (/\$/.test(t)) {
|
l = 0.58642578125
|
} else if (/\%/.test(t)) {
|
l = 0.8896484375
|
} else if (/\^/.test(t)) {
|
l = 0.74169921875
|
} else if (/\&/.test(t)) {
|
l = 0.8701171875
|
} else if (/\*/.test(t)) {
|
l = 0.455078125
|
} else if (/\(/.test(t)) {
|
l = 0.333984375
|
} else if (/\)/.test(t)) {
|
l = 0.333984375
|
} else if (/\_/.test(t)) {
|
l = 0.4482421875
|
} else if (/\-/.test(t)) {
|
l = 0.4326171875
|
} else if (/\+/.test(t)) {
|
l = 0.74169921875
|
} else if (/\=/.test(t)) {
|
l = 0.74169921875
|
} else if (/\|/.test(t)) {
|
l = 0.26904296875
|
} else if (/\\/.test(t)) {
|
l = 0.416015625
|
} else if (/\[/.test(t)) {
|
l = 0.333984375
|
} else if (/\]/.test(t)) {
|
l = 0.333984375
|
} else if (/\;/.test(t)) {
|
l = 0.24072265625
|
} else if (/\'/.test(t)) {
|
l = 0.25634765625
|
} else if (/\,/.test(t)) {
|
l = 0.24072265625
|
} else if (/\./.test(t)) {
|
l = 0.24072265625
|
} else if (/\//.test(t)) {
|
l = 0.42724609375
|
} else if (/\{/.test(t)) {
|
l = 0.333984375
|
} else if (/\}/.test(t)) {
|
l = 0.333984375
|
} else if (/\:/.test(t)) {
|
l = 0.24072265625
|
} else if (/\"/.test(t)) {
|
l = 0.435546875
|
} else if (/\</.test(t)) {
|
l = 0.74169921875
|
} else if (/\>/.test(t)) {
|
l = 0.74169921875
|
} else if (/\?/.test(t)) {
|
l = 0.48291015625
|
} else {
|
l = 1
|
}
|
return l;
|
}
|
|
// export
|
function setImage(images) { // 设置图片数据
|
_app.log('进入设置图片数据方法');
|
return new Promise(async (resolve, rejcet) => {
|
try {
|
if (images && _app.isArray(images)) {
|
_app.log('images是一个数组');
|
for (let i = 0; i < images.length; i++) {
|
_app.log('设置图片数据循环中:' + i);
|
images[i] = await setImageFn(images[i]);
|
}
|
} else {
|
_app.log('images是一个对象');
|
images = await setImageFn(images);
|
}
|
resolve(images);
|
} catch (e) {
|
//TODO handle the exception
|
rejcet(e);
|
}
|
})
|
}
|
|
function setImageFn(image) {
|
return new Promise(async (resolve, reject) => {
|
if (image.url) {
|
let imgUrl = image.url;
|
imgUrl = await _app.downloadFile_PromiseFc(imgUrl);
|
image.url = imgUrl;
|
const hasinfoCallBack = image.infoCallBack && typeof(image.infoCallBack) === 'function';
|
let imageInfo = {};
|
imageInfo = await _app.getImageInfo_PromiseFc(imgUrl);
|
if (hasinfoCallBack) {
|
image = {
|
...image,
|
...image.infoCallBack(imageInfo)
|
};
|
}
|
image.dx = image.dx || 0;
|
image.dy = image.dy || 0;
|
image.dWidth = image.dWidth || imageInfo.width;
|
image.dHeight = image.dHeight || imageInfo.height;
|
image = {
|
...image,
|
imageInfo
|
}
|
}
|
resolve(image);
|
})
|
}
|
|
// export
|
function drawText(Context, textArray, bgObj) { // 先遍历换行再绘制
|
if (!_app.isArray(textArray)) {
|
_app.log('遍历文本方法, 不是数组');
|
textArray = [textArray];
|
} else {
|
_app.log('遍历文本方法, 是数组');
|
}
|
_app.log('遍历文本方法, textArray:' + JSON.stringify(textArray));
|
const newArr = [];
|
if (textArray && textArray.length > 0) {
|
for (let j = 0; j < textArray.length; j++) {
|
const textItem = textArray[j];
|
if (textItem.text && textItem.lineFeed) {
|
let lineNum = -1,
|
maxWidth = bgObj.width,
|
lineHeight = textItem.size,
|
dx = textItem.dx;
|
if (_app.isObject(textItem.lineFeed)) {
|
const lineFeed = textItem.lineFeed;
|
lineNum = (lineFeed.lineNum !== undefined && typeof(lineFeed.lineNum) === 'number') && lineFeed.lineNum >= 0 ?
|
lineFeed.lineNum : lineNum;
|
maxWidth = (lineFeed.maxWidth !== undefined && typeof(lineFeed.maxWidth) === 'number') ? lineFeed.maxWidth :
|
maxWidth;
|
lineHeight = (lineFeed.lineHeight !== undefined && typeof(lineFeed.lineHeight) === 'number') ? lineFeed.lineHeight :
|
lineHeight;
|
dx = (lineFeed.dx !== undefined && typeof(lineFeed.dx) === 'number') ? lineFeed.dx : dx;
|
}
|
const chr = (textItem.text).split("");
|
let temp = "";
|
const row = [];
|
//循环出几行文字组成数组
|
for (let a = 0, len = chr.length; a < len; a++) {
|
if (countTextLength(Context, {
|
text: temp,
|
size: textItem.size
|
}) <= maxWidth && countTextLength(Context, {
|
text: (temp + chr[a]),
|
size: textItem.size
|
}) <= maxWidth) {
|
temp += chr[a];
|
if (a == (chr.length - 1)) {
|
row.push(temp);
|
}
|
} else {
|
row.push(temp);
|
temp = chr[a];
|
}
|
}
|
_app.log('循环出的文本数组:' + JSON.stringify(row));
|
//只显示几行 变量间距lineHeight 变量行数lineNum
|
let allNum = (lineNum >= 0 && lineNum < row.length) ? lineNum : row.length;
|
|
for (let i = 0; i < allNum; i++) {
|
let str = row[i];
|
if (i == (allNum - 1) && allNum < row.length) {
|
str = str.substring(0, str.length - 1) + '...';
|
}
|
const obj = { ...textItem,
|
text: str,
|
dx: i === 0 ? textItem.dx : (dx >= 0 ? dx : textItem.dx),
|
dy: textItem.dy + (i * lineHeight),
|
textLength: countTextLength(Context, {
|
text: str,
|
size: textItem.size
|
})
|
};
|
_app.log('重新组成的文本对象:' + JSON.stringify(obj));
|
newArr.push(obj);
|
}
|
} else {
|
newArr.push(textItem);
|
}
|
}
|
}
|
_app.log('绘制文本新数组:' + JSON.stringify(newArr));
|
drawTexts(Context, newArr);
|
}
|
|
function setFont(textItem = {}) {
|
if (textItem.font && typeof(textItem.font) === 'string') {
|
_app.log(textItem.font)
|
return textItem.font;
|
} else {
|
let fontStyle = 'normal';
|
let fontVariant = 'normal';
|
let fontWeight = 'normal';
|
let fontSize = textItem.size || 10;
|
let fontFamily = 'sans-serif';
|
fontSize = Math.ceil(Number(fontSize));
|
if (textItem.fontStyle && typeof(textItem.fontStyle) === 'string')
|
fontStyle = textItem.fontStyle.trim();
|
if (textItem.fontVariant && typeof(textItem.fontVariant) === 'string')
|
fontVariant = textItem.fontVariant.trim();
|
if (textItem.fontWeight && (typeof(textItem.fontWeight) === 'string' || typeof(textItem.fontWeight) === 'number'))
|
fontWeight = textItem.fontWeight.trim();
|
if (textItem.fontFamily && typeof(textItem.fontFamily) === 'string')
|
fontFamily = textItem.fontFamily.trim();
|
return fontStyle + ' ' +
|
fontVariant + ' ' +
|
fontWeight + ' ' +
|
fontSize + 'px' + ' ' +
|
fontFamily;
|
}
|
}
|
|
function drawTexts(Context, texts) { // 绘制文本
|
_app.log('准备绘制文本方法, texts:' + JSON.stringify(texts));
|
if (texts && _app.isArray(texts)) {
|
_app.log('准备绘制文本方法, 是数组');
|
if (texts.length > 0) {
|
for (let i = 0; i < texts.length; i++) {
|
drawTextFn(Context, texts[i]);
|
}
|
}
|
} else {
|
_app.log('准备绘制文本方法, 不是数组');
|
drawTextFn(Context, texts);
|
}
|
}
|
|
function drawTextFn(Context, textItem) {
|
_app.log('进入绘制文本方法, textItem:' + JSON.stringify(textItem));
|
if (textItem && _app.isObject(textItem) && textItem.text) {
|
Context.font = setFont(textItem);
|
Context.setFillStyle(textItem.color);
|
Context.setGlobalAlpha(textItem.alpha);
|
Context.setTextAlign(textItem.textAlign);
|
Context.setTextBaseline(textItem.textBaseline);
|
Context.fillText(textItem.text, textItem.dx, textItem.dy);
|
if (textItem.lineThrough && _app.isObject(textItem.lineThrough)) {
|
_app.log('有删除线');
|
let lineThrough = textItem.lineThrough;
|
lineThrough.alpha = lineThrough.alpha !== undefined ? lineThrough.alpha : textItem.alpha;
|
lineThrough.style = lineThrough.style || textItem.color;
|
lineThrough.width = lineThrough.width !== undefined ? lineThrough.width : textItem.size / 10;
|
lineThrough.cap = lineThrough.cap !== undefined ? lineThrough.cap : 'butt';
|
_app.log('删除线对象:' + JSON.stringify(lineThrough));
|
Context.setGlobalAlpha(lineThrough.alpha);
|
Context.setStrokeStyle(lineThrough.style);
|
Context.setLineWidth(lineThrough.width);
|
Context.setLineCap(lineThrough.cap);
|
let mx, my;
|
switch (textItem.textAlign) {
|
case 'left':
|
mx = textItem.dx;
|
break;
|
case 'center':
|
mx = textItem.dx - (textItem.textLength) / 2;
|
break;
|
default:
|
mx = textItem.dx - (textItem.textLength);
|
break;
|
}
|
switch (textItem.textBaseline) {
|
case 'top':
|
my = textItem.dy + (textItem.size * .5);
|
break;
|
case 'middle':
|
my = textItem.dy;
|
break;
|
default:
|
my = textItem.dy - (textItem.size * .5);
|
break;
|
}
|
Context.beginPath();
|
Context.moveTo(mx, my);
|
Context.lineTo(mx + textItem.textLength, my);
|
Context.stroke();
|
Context.closePath();
|
_app.log('删除线完毕');
|
}
|
Context.setGlobalAlpha(1);
|
Context.font = '10px sans-serif';
|
}
|
}
|
// export
|
function drawImage(Context, images) { // 绘制图片
|
_app.log('判断图片数据类型:' + JSON.stringify(images))
|
if (images && _app.isArray(images)) {
|
if (images.length > 0) {
|
for (let i = 0; i < images.length; i++) {
|
readyDrawImageFn(Context, images[i]);
|
}
|
}
|
} else {
|
readyDrawImageFn(Context, images);
|
}
|
|
}
|
|
function readyDrawImageFn(Context, img) {
|
_app.log('判断绘制图片形状, img:' + JSON.stringify(img));
|
if (img.url) {
|
if (img.circleSet) {
|
drawCircleImage(Context, img);
|
} else if (img.roundRectSet) {
|
drawRoundRectImage(Context, img);
|
} else {
|
drawImageFn(Context, img);
|
}
|
}
|
}
|
|
function drawImageFn(Context, img) {
|
_app.log('进入绘制默认图片方法, img:' + JSON.stringify(img));
|
if (img.url) {
|
const hasAlpha = !_app.isUndef(img.alpha);
|
img.alpha = Number(!_app.isUndef(img.alpha) ? img.alpha : 1);
|
Context.setGlobalAlpha(img.alpha);
|
_app.log('绘制默认图片方法, 有url');
|
if (img.dWidth && img.dHeight && img.sx && img.sy && img.sWidth && img.sHeight) {
|
_app.log('绘制默认图片方法, 绘制第一种方案');
|
Context.drawImage(img.url, img.dx || 0, img.dy || 0,
|
img.dWidth || false, img.dHeight || false,
|
img.sx || false, img.sy || false,
|
img.sWidth || false, img.sHeight || false);
|
} else if (img.dWidth && img.dHeight) {
|
_app.log('绘制默认图片方法, 绘制第二种方案');
|
Context.drawImage(img.url, img.dx || 0, img.dy || 0,
|
img.dWidth || false, img.dHeight || false);
|
} else {
|
_app.log('绘制默认图片方法, 绘制第三种方案');
|
Context.drawImage(img.url, img.dx || 0, img.dy || 0);
|
}
|
if (hasAlpha) {
|
Context.setGlobalAlpha(1);
|
}
|
}
|
_app.log('绘制默认图片方法, 绘制完毕');
|
}
|
|
function drawCircleImage(Context, obj) {
|
_app.log('进入绘制圆形图片方法, obj:' + JSON.stringify(obj));
|
let {
|
dx,
|
dy,
|
dWidth,
|
dHeight,
|
circleSet,
|
imageInfo
|
} = obj;
|
let x, y, r;
|
if (typeof circleSet === 'object') {
|
x = circleSet.x;
|
y = circleSet.y;
|
r = circleSet.r;
|
}
|
if (!r) {
|
let d;
|
d = dWidth > dHeight ? dHeight : dWidth;
|
r = d / 2;
|
}
|
|
x = x ? dx + x : (dx || 0) + r;
|
y = y ? dy + y : (dy || 0) + r;
|
Context.save();
|
Context.beginPath();
|
Context.arc(x, y, r, 0, 2 * Math.PI, false);
|
Context.closePath();
|
Context.setGlobalAlpha(0);
|
Context.fillStyle = '#FFFFFF';
|
Context.fill();
|
Context.setGlobalAlpha(1);
|
Context.clip();
|
drawImageFn(Context, obj);
|
_app.log('默认图片绘制完毕');
|
Context.restore();
|
}
|
|
function drawRoundRectImage(Context, obj) { // 绘制矩形
|
_app.log('进入绘制矩形图片方法, obj:' + JSON.stringify(obj));
|
Context.save();
|
let {
|
dx,
|
dy,
|
dWidth,
|
dHeight,
|
roundRectSet,
|
imageInfo
|
} = obj;
|
let r;
|
if (typeof roundRectSet === 'object') {
|
r = roundRectSet.r;
|
}
|
r = r || dWidth * .1;
|
|
if (dWidth < 2 * r) {
|
r = dWidth / 2;
|
}
|
if (dHeight < 2 * r) {
|
r = dHeight / 2;
|
}
|
Context.beginPath();
|
Context.moveTo(dx + r, dy);
|
Context.arcTo(dx + dWidth, dy, dx + dWidth, dy + dHeight, r);
|
Context.arcTo(dx + dWidth, dy + dHeight, dx, dy + dHeight, r);
|
Context.arcTo(dx, dy + dHeight, dx, dy, r);
|
Context.arcTo(dx, dy, dx + dWidth, dy, r);
|
Context.closePath();
|
Context.setGlobalAlpha(0);
|
Context.fillStyle = '#FFFFFF';
|
Context.fill();
|
Context.setGlobalAlpha(1);
|
Context.clip();
|
drawImageFn(Context, obj);
|
Context.restore();
|
_app.log('进入绘制矩形图片方法, 绘制完毕');
|
}
|
|
// export
|
function drawQrCode(Context, qrCodeObj) { //生成二维码方法， 参考了 诗小柒 的二维码生成器代码
|
_app.log('进入绘制二维码方法')
|
_app.showLoading('正在生成二维码');
|
let qrcodeAlgObjCache = [];
|
let options = {
|
text: String(qrCodeObj.text || '') || '', // 生成内容
|
size: Number(qrCodeObj.size || 0) || 200, // 二维码大小
|
background: String(qrCodeObj.background || '') || '#ffffff', // 背景色
|
foreground: String(qrCodeObj.foreground || '') || '#000000', // 前景色
|
pdground: String(qrCodeObj.pdground || '') || '#000000', // 定位角点颜色
|
correctLevel: Number(qrCodeObj.correctLevel || 0) || 3, // 容错级别
|
image: String(qrCodeObj.image || '') || '', // 二维码图标
|
imageSize: Number(qrCodeObj.imageSize || 0) || 40, // 二维码图标大小
|
dx: Number(qrCodeObj.dx || 0) || 0, // x轴距离
|
dy: Number(qrCodeObj.dy || 0) || 0 // y轴距离
|
}
|
let qrCodeAlg = null;
|
let d = 0;
|
for (var i = 0, l = qrcodeAlgObjCache.length; i < l; i++) {
|
d = i;
|
if (qrcodeAlgObjCache[i].text == options.text && qrcodeAlgObjCache[i].text.correctLevel == options.correctLevel) {
|
qrCodeAlg = qrcodeAlgObjCache[i].obj;
|
break;
|
}
|
}
|
if (d == l) {
|
qrCodeAlg = new QRCodeAlg(options.text, options.correctLevel);
|
qrcodeAlgObjCache.push({
|
text: options.text,
|
correctLevel: options.correctLevel,
|
obj: qrCodeAlg
|
});
|
}
|
let getForeGround = function(config) {
|
let options = config.options;
|
if (options.pdground && (
|
(config.row > 1 && config.row < 5 && config.col > 1 && config.col < 5) ||
|
(config.row > (config.count - 6) && config.row < (config.count - 2) && config.col > 1 && config.col < 5) ||
|
(config.row > 1 && config.row < 5 && config.col > (config.count - 6) && config.col < (config.count - 2))
|
)) {
|
return options.pdground;
|
}
|
return options.foreground;
|
}
|
let count = qrCodeAlg.getModuleCount();
|
let ratioSize = options.size;
|
let ratioImgSize = options.imageSize;
|
//计算每个点的长宽
|
let tileW = (ratioSize / count).toPrecision(4);
|
let tileH = (ratioSize / count).toPrecision(4);
|
//绘制
|
for (let row = 0; row < count; row++) {
|
for (let col = 0; col < count; col++) {
|
let w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW));
|
let h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW));
|
let foreground = getForeGround({
|
row: row,
|
col: col,
|
count: count,
|
options: options
|
});
|
Context.setFillStyle(qrCodeAlg.modules[row][col] ? foreground : options.background);
|
Context.fillRect(options.dx + Math.round(col * tileW), options.dy + Math.round(row * tileH), w, h);
|
}
|
}
|
if (options.image) {
|
let x = options.dx + Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
|
let y = options.dy + Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
|
drawRoundedRect(Context, x, y, ratioImgSize, ratioImgSize, 2, 6, true, true)
|
Context.drawImage(options.image, x, y, ratioImgSize, ratioImgSize);
|
// 画圆角矩形
|
function drawRoundedRect(ctxi, x, y, width, height, r, lineWidth, fill, stroke) {
|
ctxi.setLineWidth(lineWidth);
|
ctxi.setFillStyle(options.background);
|
ctxi.setStrokeStyle(options.background);
|
ctxi.beginPath(); // draw top and top right corner
|
ctxi.moveTo(x + r, y);
|
ctxi.arcTo(x + width, y, x + width, y + r, r); // draw right side and bottom right corner
|
ctxi.arcTo(x + width, y + height, x + width - r, y + height, r); // draw bottom and bottom left corner
|
ctxi.arcTo(x, y + height, x, y + height - r, r); // draw left and top left corner
|
ctxi.arcTo(x, y, x + r, y, r);
|
ctxi.closePath();
|
if (fill) {
|
ctxi.fill();
|
}
|
if (stroke) {
|
ctxi.stroke();
|
}
|
}
|
}
|
_app.hideLoading();
|
}
|
|
|
function getShreUserPosterBackground(objs) { //检查背景图是否存在于本地， 若存在直接返回， 否则调用getShreUserPosterBackgroundFc方法
|
let {
|
backgroundImage,
|
type
|
} = objs;
|
return new Promise(async (resolve, reject) => {
|
try {
|
_app.showLoading('正在获取海报背景图');
|
let pbg;
|
// #ifndef H5
|
pbg = getPosterStorage(type);
|
// #endif
|
// #ifdef H5
|
pbg = false;
|
// #endif
|
_app.log('获取的缓存:' + JSON.stringify(pbg));
|
if (pbg && pbg.path && pbg.name) {
|
_app.log('海报有缓存, 准备获取后端背景图进行对比');
|
const image = await _app.getPosterUrl(objs);
|
_app.log('准备对比name是否相同');
|
if (pbg.name === _app.fileNameInPath(image)) {
|
_app.log('name相同, 判断该背景图是否存在于本地')
|
const index = await _app.checkFile_PromiseFc(pbg.path)
|
if (index >= 0) {
|
_app.log('海报save路径存在, 对比宽高信息, 存储并输出');
|
const imageObj = await _app.getImageInfo_PromiseFc(pbg.path);
|
let obj = { ...pbg
|
};
|
if (!pbg.width || !pbg.height || pbg.width !== imageObj.width || pbg.height !== imageObj.height) {
|
_app.log('宽高对比不通过， 重新获取');
|
const savedFilePath = await getShreUserPosterBackgroundFc(objs, image)
|
_app.hideLoading();
|
resolve(savedFilePath);
|
} else {
|
_app.log('宽高对比通过, 再次存储, 并返回路径');
|
obj = {
|
...pbg,
|
width: imageObj.width,
|
height: imageObj.height
|
};
|
// #ifndef H5
|
setPosterStorage(type, { ...obj
|
});
|
// #endif
|
_app.hideLoading();
|
resolve(obj);
|
}
|
} else {
|
_app.log('海报save路径不存在, 重新获取海报');
|
const savedFilePath = await getShreUserPosterBackgroundFc(objs, image)
|
_app.hideLoading();
|
resolve(savedFilePath);
|
}
|
} else {
|
_app.log('name不相同, 重新获取海报');
|
const savedFilePath = await getShreUserPosterBackgroundFc(objs, image)
|
_app.hideLoading();
|
resolve(savedFilePath);
|
}
|
} else {
|
_app.log('海报背景图没有缓存, 准备获取海报背景图');
|
const savedFilePath = await getShreUserPosterBackgroundFc(objs)
|
_app.hideLoading();
|
resolve(savedFilePath);
|
}
|
} catch (e) {
|
_app.hideLoading();
|
_app.showToast('获取分享用户背景图失败:' + JSON.stringify(e));
|
_app.log(JSON.stringify(e));
|
reject(e);
|
}
|
})
|
}
|
|
function getPosterStorage(type) {
|
return _app.getStorageSync(getStorageKey(type));
|
}
|
|
function removePosterStorage(type) {
|
const ShreUserPosterBackgroundKey = getStorageKey(type);
|
const pbg = _app.getStorageSync(ShreUserPosterBackgroundKey);
|
if (pbg && pbg.path) {
|
_app.removeSavedFile(pbg.path);
|
_app.removeStorageSync(ShreUserPosterBackgroundKey);
|
}
|
}
|
|
function setPosterStorage(type, data) {
|
_app.setStorage(getStorageKey(type), data);
|
}
|
|
function getStorageKey(type) {
|
return ShreUserPosterBackgroundKey + (type || 'default');
|
}
|
|
function getShreUserPosterBackgroundFc(objs, upimage) { //下载并保存背景图方法
|
let {
|
backgroundImage,
|
type
|
} = objs;
|
_app.log('获取分享背景图, 尝试清空本地数据');
|
removePosterStorage(type);
|
return new Promise(async (resolve, reject) => {
|
try {
|
_app.showLoading('正在下载海报背景图');
|
if (upimage) {
|
_app.log('有从后端获取的背景图片路径');
|
_app.log('尝试下载并保存背景图');
|
const name = _app.fileNameInPath(upimage);
|
const savedFilePath = await _app.downLoadAndSaveFile_PromiseFc(upimage);
|
if (savedFilePath) {
|
_app.log('下载并保存背景图成功:' + savedFilePath);
|
const imageObj = await _app.getImageInfo_PromiseFc(savedFilePath);
|
const returnObj = {
|
path: savedFilePath,
|
width: imageObj.width,
|
height: imageObj.height,
|
name
|
}
|
// #ifndef H5
|
setPosterStorage(type, { ...returnObj
|
});
|
// #endif
|
_app.hideLoading();
|
resolve(returnObj);
|
} else {
|
_app.hideLoading();
|
reject('not find savedFilePath');
|
}
|
} else {
|
_app.log('没有从后端获取的背景图片路径, 尝试从后端获取背景图片路径');
|
const image = await _app.getPosterUrl(objs);
|
_app.log('尝试下载并保存背景图:' + image);
|
const savedFilePath = await _app.downLoadAndSaveFile_PromiseFc(image);
|
if (savedFilePath) {
|
_app.log('下载并保存背景图成功:' + savedFilePath);
|
const imageObj = await _app.getImageInfo_PromiseFc(savedFilePath);
|
_app.log('获取图片信息成功');
|
const returnObj = {
|
path: savedFilePath,
|
width: imageObj.width,
|
height: imageObj.height,
|
name: _app.fileNameInPath(image)
|
}
|
_app.log('拼接背景图信息对象成功:' + JSON.stringify(returnObj));
|
|
// #ifndef H5
|
setPosterStorage(type, { ...returnObj
|
});
|
// #endif
|
|
_app.hideLoading();
|
_app.log('返回背景图信息对象');
|
resolve({ ...returnObj
|
});
|
} else {
|
_app.hideLoading();
|
reject('not find savedFilePath');
|
}
|
}
|
} catch (e) {
|
//TODO handle the exception
|
reject(e);
|
}
|
});
|
}
|
|
|
module.exports = {
|
getSharePoster,
|
setText,
|
setImage,
|
drawText,
|
drawImage,
|
drawQrCode
|
}
|
