69 lines
2.5 KiB
JavaScript
69 lines
2.5 KiB
JavaScript
/* Copyright 2014 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var PDF_PATH = '../../web/compressed.tracemonkey-pldi-09.pdf';
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var PAGE_NUMBER = 1;
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var PAGE_SCALE = 1.5;
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var SVG_NS = 'http://www.w3.org/2000/svg';
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function buildSVG(viewport, textContent) {
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// Building SVG with size of the viewport (for simplicity)
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var svg = document.createElementNS(SVG_NS, 'svg:svg');
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svg.setAttribute('width', viewport.width + 'px');
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svg.setAttribute('height', viewport.height + 'px');
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// items are transformed to have 1px font size
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svg.setAttribute('font-size', 1);
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// processing all items
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textContent.items.forEach(function (textItem) {
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// we have to take in account viewport transform, which incudes scale,
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// rotation and Y-axis flip, and not forgetting to flip text.
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var tx = PDFJS.Util.transform(
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PDFJS.Util.transform(viewport.transform, textItem.transform),
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[1, 0, 0, -1, 0, 0]);
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var style = textContent.styles[textItem.fontName];
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// adding text element
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var text = document.createElementNS(SVG_NS, 'svg:text');
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text.setAttribute('transform', 'matrix(' + tx.join(' ') + ')');
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text.setAttribute('font-family', style.fontFamily);
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text.textContent = textItem.str;
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svg.appendChild(text);
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});
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return svg;
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}
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function pageLoaded() {
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// Loading document and page text content
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PDFJS.getDocument({url: PDF_PATH}).then(function (pdfDocument) {
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pdfDocument.getPage(PAGE_NUMBER).then(function (page) {
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var viewport = page.getViewport(PAGE_SCALE);
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page.getTextContent().then(function (textContent) {
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// building SVG and adding that to the DOM
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var svg = buildSVG(viewport, textContent);
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document.getElementById('pageContainer').appendChild(svg);
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});
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});
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});
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}
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document.addEventListener('DOMContentLoaded', function () {
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if (typeof PDFJS === 'undefined') {
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alert('Built version of PDF.js was not found.\n' +
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'Please run `node make generic`.');
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return;
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}
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pageLoaded();
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});
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