如何用pdf.js搜索？ [英] How to search with pdf.js?

问题描述

我在Ionic App中显示pdf文件和pdf.js。我不使用viewer.js和viewer.html，因为我需要一个完全不同的布局。现在我有一个自定义搜索栏，我想在我的pdf文件中突出显示术语。有没有我可以调用的函数来执行此操作？

I'm displaying a pdf file with pdf.js in my Ionic App. I do not use viewer.js and viewer.html, because I need a totally different layout. Now I have a custom search bar and I want to highlight terms in my pdf file. Is there a function I can invoke to do this?

我正在渲染这样的文件：

I'm rendering the file like this:

$scope.renderPages = function(pdfDoc) {
    $scope.pdfFile = pdfDoc;
    for(var num = 1; num <= pdfDoc.numPages; num++){
        pdfDoc.getPage(num).then($scope.renderPage);
    }
}

$scope.renderPage = function(page) {
    var viewport = page.getViewport(1);
    scale = document.getElementById('viewer').clientWidth / viewport.width;
    viewport = page.getViewport(scale);

    var canvas = document.createElement('canvas');
    var ctx = canvas.getContext('2d');
    var renderContext = {
        canvasContext: ctx,
        viewport: viewport
    };

    canvas.height = viewport.height;
    canvas.width = viewport.width;

    var canvasContainer = document.getElementById('viewer');
    canvasContainer.appendChild(canvas);

    page.render(renderContext);
}

HTML：

<div id="viewerContainer" style="padding-bottom: 100%; padding-top: 20px;">
    <div id="viewer" class="viewer-styles">
    </div>
</div>

推荐答案

现在我找到了解决方案！

Now I found the solution!

var container = document.getElementById('viewerContainer');
var viewer = document.getElementById('viewer');


var pdfViewer = new PDFViewer({ 
   container: container,
   viewer: viewer
});

$scope.pdfFindController = new PDFFindController({
   pdfViewer: pdfViewer
);

pdfViewer.setFindController($scope.pdfFindController);

container.addEventListener('pagesinit', function () {
    pdfViewer.currentScaleValue = 'page-width';                            
});

PDFJS.getDocument(MY_PATH_TO_THE_PDF).then(function (pdfDocument) {
    pdfViewer.setDocument(pdfDocument);
});

搜索条件：

$scope.pdfFindController.executeCommand('find', {
    caseSensitive: false, 
    findPrevious: undefined,
    highlightAll: true, 
    phraseSearch: true, 
    query: "myQuery"
});

我必须导入viewer.js。

And I had to import the viewer.js.

我不再需要在问题中发布的代码了。 PDFViewer呈现pdf。

The code that I posted in the question is not needed anymore. The PDFViewer renders the pdf.

这篇关于如何用pdf.js搜索？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！