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@ -1,21 +1,19 @@
@@ -1,21 +1,19 @@
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//Minimal PDF rendering and text-selection example using pdf.js by Vivin Suresh Paliath (http://vivin.net)
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//This example uses a built version of pdf.js that contains all modules that it requires.
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// Minimal PDF rendering and text-selection example using PDF.js by Vivin Suresh Paliath (http://vivin.net)
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// This example uses a built version of PDF.js that contains all modules that it requires.
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//
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// The problem with understanding text selection was that the text selection code has heavily intertwined
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// with viewer.html and viewer.js. I have extracted the parts I need out of viewer.js into a separate file
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// which contains the bare minimum required to implement text selection. The key component is TextLayerBuilder,
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// which is the object that handles the creation of text-selection divs. I have added this code as an external
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// resource.
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//
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//The problem with understanding text selection was that the text selection code has heavily intertwined
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//with viewer.html and viewer.js. I have extracted the parts I need out of viewer.js into a separate file
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//which contains the bare minimum required to implement text selection. The key component is TextLayerBuilder,
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//which is the object that handles the creation of text-selection divs. I have added this code as an external
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//resource.
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// This demo uses a PDF that only has one page. You can render other pages if you wish, but the focus here is
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// just to show you how you can render a PDF with text selection. Hence the code only loads up one page.
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//
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//This demo uses a PDF that only has one page. You can render other pages if you wish, but the focus here is
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//just to show you how you can render a PDF with text selection. Hence the code only loads up one page.
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//
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//The CSS used here is also very important since it sets up the CSS for the text layer divs overlays that
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//you actually end up selecting.
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// The CSS used here is also very important since it sets up the CSS for the text layer divs overlays that
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// you actually end up selecting.
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window.onload = function () { |
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var scale = 1.5; //Set this to whatever you want. This is basically the "zoom" factor for the PDF.
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PDFJS.workerSrc = '../../src/worker_loader.js'; |
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@ -32,13 +30,13 @@ window.onload = function () {
@@ -32,13 +30,13 @@ window.onload = function () {
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var viewport = page.getViewport(scale); |
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var $canvas = jQuery("<canvas></canvas>"); |
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//Set the canvas height and width to the height and width of the viewport
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// Set the canvas height and width to the height and width of the viewport
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var canvas = $canvas.get(0); |
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var context = canvas.getContext("2d"); |
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canvas.height = viewport.height; |
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canvas.width = viewport.width; |
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//Append the canvas to the pdf container div
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// Append the canvas to the pdf container div
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var $pdfContainer = jQuery("#pdfContainer"); |
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$pdfContainer.css("height", canvas.height + "px").css("width", canvas.width + "px"); |
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$pdfContainer.append($canvas); |
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@ -53,7 +51,7 @@ window.onload = function () {
@@ -53,7 +51,7 @@ window.onload = function () {
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left: canvasOffset.left |
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}); |
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//The following few lines of code set up scaling on the context if we are on a HiDPI display
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// The following few lines of code set up scaling on the context if we are on a HiDPI display
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var outputScale = getOutputScale(context); |
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if (outputScale.scaled) { |
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var cssScale = 'scale(' + (1 / outputScale.sx) + ', ' + |
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@ -76,12 +74,10 @@ window.onload = function () {
@@ -76,12 +74,10 @@ window.onload = function () {
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$pdfContainer.append($textLayerDiv); |
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page.getTextContent().then(function (textContent) { |
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var textLayer = new TextLayerBuilder({ |
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textLayerDiv: $textLayerDiv.get(0), |
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pageIndex: 0 |
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}); |
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textLayer.setTextContent(textContent); |
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var renderContext = { |
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