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| $("head").append('<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>');
let my_script=`<script>
function px2Num(px) {
return Number(px.split("px")[0].toString());
}
function getPages(){
if( $("canvas[id^=canvas_]").length > 0 ) {
$("canvas[id^=canvas_]").delete();
}
var baseurl = "http://c.gb688.cn/bzgk/gb/";
var pagecount = $("div.page").length;
var pages = new Array(pagecount);
var pagebg = new Array(pagecount);
var title = $("title").text().split("|")[1].toString().trim();
var pheight = $("#0").css("height");
var pwidth = $("#0").css("width");
$(".page").each(function(i, elem) {
if (elem.hasAttribute("bg")) {
pagebg[i] = elem.getAttribute("bg");
} else {
pagebg[i] = $(elem).children("span").first().css("background-image").split('"')[
1].split(/\\//).slice(-1)[0];
}
});
$(".page").each(function(i, elem) {
var canvasclone = $("canvas#canvas").clone();
canvasclone.attr("id","canvas_"+i).css("background-color","#FFFFFFFF");
$("#newimg").append(canvasclone);
var canvas = document.getElementById('canvas_'+i);
var ctx = canvas.getContext('2d');
ctx.fillStyle="white";
ctx.fillRect(0,0,px2Num(pwidth), px2Num(pheight));
$("#imgContainer").append("<img id=img_" + i + " src='" + baseurl+pagebg[i] + "' />")
var image = document.getElementById('img_'+i);
image.addEventListener('load', e => {
$(elem).children("span").each(function(j,s){
ctx.drawImage(image, -px2Num($(s).css("background-position-x")), -px2Num($(s).css("background-position-y")), 119, 168,
$(s).attr("class").split('-')[1]*119, $(s).attr("class").split('-')[2]*168, 119, 168);
});
});
});
}
function isimgComplete(imgs){
flag = true;
for(i=0;i<imgs.length;i++){
flag=flag && imgs[i].complete;
}
return flag;
}
function downloadPDF(){
if( $("canvas[id^=canvas_]").length == 0 ) {
alert("请先点击获取页面！");
return;
}
var images = $("img[id^=img_]");
if(!isimgComplete(images)){
alert("页面尚未提取完，稍等");
return;
}
var pheight = $("#0").css("height");
var pwidth = $("#0").css("width");
const { jsPDF } = window.jspdf;
const pdf = new jsPDF('p','px',[px2Num(pwidth), px2Num(pheight)]);
var title = $("title").text().split("|")[1].toString().trim();
let [imgX, imgY] = [595.28, 841.89];
let imgHeight = imgX / (px2Num(pwidth) / px2Num(pheight));
$("canvas[id^=canvas_]").each(function(i,e){
pdf.addImage(document.getElementById('canvas_'+i).toDataURL('image/jpeg'), 'jpeg', 0, 0, px2Num(pwidth), px2Num(pheight), '', 'MEDDIUM');
pdf.addPage();
});
let targetPage = pdf.internal.getNumberOfPages();
pdf.deletePage(targetPage);
pdf.save(title + ".pdf");
}
function downloadPDF0(){
while($("canvas[id^=canvas_]").length < $(".page").length){
setTimeout(function(){
},1000);
}
}
</script>`;
let source_img = `
<div id="canvas_container">
<input type="button" value="获取页面" onclick="getPages()"/>
<input type="button" value="下载pdf" onclick="downloadPDF()"/>
</div>
<div id="imgContainer" style="display:none;"><img id="source" src=""></div>
<div id="newimg" width="1190px"></div>
<canvas id="canvas" width="1190px" height="1680px" style="display:none;"></canvas>`;
let style = `
<style>
#canvas_container {
position: fixed;
height: 30px;
width: 150px;
top: 50px;
left: 10px;
border: 1px;
border-radius: 3px;
}
</style>
`;
$("head").append(style);
$("body").append(source_img);
$("body").append(my_script);
|
