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Alternative fix fonts issue in printing #156

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Alternative fix fonts issue in printing #156

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6f59582
Remove 1pt margin on page for printing.
May 27, 2019
7ac48fc
Resolve missing font issue by rendering in original DOM first and cop…
May 27, 2019
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20 changes: 16 additions & 4 deletions src/pdfjsWrapper.js
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Original file line number Diff line number Diff line change
Expand Up @@ -77,10 +77,14 @@ export default function(PDFJS) {
var CSS_UNITS = 96.0 / 72.0;

var iframeElt = document.createElement('iframe');
var tempElt = document.createElement('div');
tempElt.style.cssText = 'display: none';
window.document.body.appendChild(tempElt);

function removeIframe() {

iframeElt.parentNode.removeChild(iframeElt);
tempElt.parentNode.removeChild(tempElt);
}

new Promise(function(resolve, reject) {
Expand Down Expand Up @@ -108,9 +112,8 @@ export default function(PDFJS) {
var viewport = page.getViewport(1);
win.document.head.appendChild(win.document.createElement('style')).textContent =
'@supports ((size:A4) and (size:1pt 1pt)) {' +
'@page { margin: 1pt; size: ' + ((viewport.width * PRINT_UNITS) / CSS_UNITS) + 'pt ' + ((viewport.height * PRINT_UNITS) / CSS_UNITS) + 'pt; }' +
'}' +

'@page { size: ' + ((viewport.width * PRINT_UNITS) / CSS_UNITS) + 'pt ' + ((viewport.height * PRINT_UNITS) / CSS_UNITS) + 'pt; }' +
'}'+
'@media print {' +
'body { margin: 0 }' +
'canvas { page-break-before: avoid; page-break-after: always; page-break-inside: avoid }' +
Expand Down Expand Up @@ -139,7 +142,7 @@ export default function(PDFJS) {

var viewport = page.getViewport(1);

var printCanvasElt = win.document.body.appendChild(win.document.createElement('canvas'));
var printCanvasElt = tempElt.appendChild(document.createElement('canvas'));
printCanvasElt.width = (viewport.width * PRINT_UNITS);
printCanvasElt.height = (viewport.height * PRINT_UNITS);

Expand All @@ -158,6 +161,15 @@ export default function(PDFJS) {

Promise.all(allPages)
.then(function() {
for (var i = 0; i < tempElt.children.length; ++i) {
var child = tempElt.children[i];
var canvas = child.cloneNode(true);

var ctx = canvas.getContext('2d');
ctx.drawImage(child, 0, 0);

win.document.body.appendChild(canvas);
}

win.focus(); // Required for IE
if (win.document.queryCommandSupported('print')) {
Expand Down