相关疑难解决方法(0)

我想PDF.js.

我的问题是Hello World演示版不支持文本选择.它将在没有文本图层的画布中绘制所有内容.该官员PDF.js演示不支持文本选择,但代码过于复杂.我想知道是否有人有文本层的简约演示.

如何使PDF中的文本可选？

在这里尝试过.PDF写得很好,但没有文字选择

https://github.com/mozilla/pdf.js

https://github.com/mozilla/pdf.js/blob/master/web/text_layer_builder.css
https://github.com/mozilla/pdf.js/blob/master/web/text_layer_builder.js

'use strict';

PDFJS.getDocument('file.pdf').then(function(pdf){
    var page_num = 1;
    pdf.getPage(page_num).then(function(page){
        var scale = 1.5;
        var viewport = page.getViewport(scale);
        var canvas = document.getElementById('the-canvas');
        var context = canvas.getContext('2d');
        canvas.height = viewport.height;
        canvas.width = viewport.width;

        var canvasOffset = $(canvas).offset();
        var $textLayerDiv = $('#text-layer').css({
            height : viewport.height+'px',
            width : viewport.width+'px',
            top : canvasOffset.top,
            left : canvasOffset.left
        });

        page.render({
            canvasContext : context,
            viewport : viewport
        });

        page.getTextContent().then(function(textContent){
            var textLayer = new TextLayerBuilder({
                textLayerDiv : $textLayerDiv.get(0),
                pageIndex : page_num - 1,
                viewport : …