guyitang/mbos/sdfsdfgdsg

$(document).ready(function() {
    var recordId = requestParam.recordId;
    var hrefStr = requestParam.hrefStr;

    // 获取PDF容器和设置其样式
    var pdfContainer = document.getElementById("pdf-container");
    pdfContainer.style.width = 'calc(100% - 20px)'; // 左右间隔10px
    pdfContainer.style.margin = '0 auto';
    pdfContainer.style.overflow = 'auto'; // 允许滚动

    // 调用后端服务获取base64编码的PDF数据
    mbos.eas.invokeScript({
        name: "commonOSFservice",
        param: ['getJobRegistrationPackage', JSON.stringify({ recordId: recordId })],
        success: function(res) {
            // 后端获取到的base64Data
            var base64Data = res.msg;

            // 将base64数据转换为PDF.js可以识别的格式
            var pdfData = atob(base64Data);
            var loadingTask = pdfjsLib.getDocument({data: pdfData});

            loadingTask.promise.then(function(pdf) {
                // 获取第一页（可以根据需要修改）
                pdf.getPage(1).then(function(page) {
                    var scale = 1.5; // 初始缩放比例，可以根据需要调整
                    var viewport = page.getViewport({ scale: scale });

                    // 设置容器的宽度和高度
                    pdfContainer.style.width = viewport.width + 'px';
                    pdfContainer.style.height = viewport.height + 'px';

                    // 创建一个canvas元素来渲染PDF页面
                    var canvas = document.createElement('canvas');
                    var context = canvas.getContext('2d');
                    canvas.height = viewport.height;
                    canvas.width = viewport.width;

                    // 将canvas添加到容器中
                    pdfContainer.appendChild(canvas);

                    // 渲染PDF页面到canvas上
                    var renderContext = {
                        canvasContext: context,
                        viewport: viewport
                    };
                    page.render(renderContext);

                    // 添加缩放和拖拽功能
                    var isDragging = false;
                    var lastScale = scale;
                    var startX, startY, startScale;

                    // 缩放事件
                    canvas.addEventListener('wheel', function(event) {
                        if (event.deltaY < 0) {
                            scale *= 1.1;
                        } else {
                            scale /= 1.1;
                        }
                        renderPage(scale);
                    });

                    // 拖拽事件
                    canvas.addEventListener('mousedown', function(event) {
                        isDragging = true;
                        startX = event.clientX - canvas.offsetLeft;
                        startY = event.clientY - canvas.offsetTop;
                        startScale = scale;
                    });

                    canvas.addEventListener('mousemove', function(event) {
                        if (isDragging) {
                            var dx = event.clientX - startX;
                            var dy = event.clientY - startY;

                            // 更新canvas的位置
                            canvas.style.left = dx + 'px';
                            canvas.style.top = dy + 'px';
                        }
                    });

                    canvas.addEventListener('mouseup', function() {
                        isDragging = false;
                    });

                    canvas.addEventListener('mouseout', function() {
                        isDragging = false;
                    });

                    // 重新渲染页面的函数
                    function renderPage(newScale) {
                        viewport = page.getViewport({ scale: newScale });
                        canvas.width = viewport.width;
                        canvas.height = viewport.height;

                        renderContext.viewport = viewport;
                        page.render(renderContext);
                    }
                });
            }, function(reason) {
                console.error(reason);
            });
        },
        error: function(e) {
            console.log(e);
        }
    });

    // 隐藏或显示按钮
    if (hrefStr == null) {
        $('#myButton').hide();
    }

    // 按钮点击事件
    $('#myButton').click(function() {
        window.location.href = hrefStr + "/judge_page?recordId=" + encodeURIComponent(recordId);
    });
});