如何使用 pdf.js 进行搜索? [英] How to search with pdf.js?

问题描述

我正在我的 Ionic 应用程序中显示一个带有 pdf.js 的 pdf 文件.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，我想突出显示我的 pdf 文件中的术语.是否有我可以调用的函数来执行此操作?

我正在渲染这样的文件:

$scope.renderPages = function(pdfDoc) {$scope.pdfFile = pdfDoc;for(var num = 1; num <= pdfDoc.numPages; num++){pdfDoc.getPage(num).then($scope.renderPage);}}$scope.renderPage = 函数(页面){var viewport = page.getViewport(1);scale = document.getElementById('viewer').clientWidth/viewport.width;视口 = page.getViewport(scale);var canvas = document.createElement('canvas');var ctx = canvas.getContext('2d');var renderContext = {画布上下文:ctx，视口:视口};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">

解决方案

现在我找到了解决方案！

var container = document.getElementById('viewerContainer');var viewer = document.getElementById('viewer');var pdfViewer = 新的 PDFViewer({容器:容器，观众:观众});$scope.pdfFindController = 新的 PDFFindController({pdfViewer: pdfViewer);pdfViewer.setFindController($scope.pdfFindController);container.addEventListener('pagesinit', function () {pdfViewer.currentScaleValue = '页面宽度';});PDFJS.getDocument(MY_PATH_TO_THE_PDF).then(function (pdfDocument) {pdfViewer.setDocument(pdfDocument);});

搜索词:

$scope.pdfFindController.executeCommand('find', {区分大小写:假，findPrevious:未定义，亮点全部:真实，短语搜索:真实，查询:我的查询"});

我不得不导入viewer.js.

不再需要我在问题中发布的代码.PDFViewer 呈现 pdf.

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?

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>

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);
});

Search for terms:

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

And I had to import the viewer.js.

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

这篇关于如何使用 pdf.js 进行搜索?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！