60 lines
2.3 KiB
JavaScript
Executable File
60 lines
2.3 KiB
JavaScript
Executable File
import Worker from '../worker.js';
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import { unitConvert } from '../utils.js';
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// Add hyperlink functionality to the PDF creation.
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// Main link array, and refs to original functions.
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var linkInfo = [];
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var orig = {
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toContainer: Worker.prototype.toContainer,
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toPdf: Worker.prototype.toPdf,
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};
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Worker.prototype.toContainer = function toContainer() {
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return orig.toContainer.call(this).then(function toContainer_hyperlink() {
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// Retrieve hyperlink info if the option is enabled.
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if (this.opt.enableLinks) {
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// Find all anchor tags and get the container's bounds for reference.
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var container = this.prop.container;
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var links = container.querySelectorAll('a');
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var containerRect = unitConvert(container.getBoundingClientRect(), this.prop.pageSize.k);
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linkInfo = [];
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// Loop through each anchor tag.
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Array.prototype.forEach.call(links, function(link) {
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// Treat each client rect as a separate link (for text-wrapping).
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var clientRects = link.getClientRects();
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for (var i=0; i<clientRects.length; i++) {
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var clientRect = unitConvert(clientRects[i], this.prop.pageSize.k);
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clientRect.left -= containerRect.left;
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clientRect.top -= containerRect.top;
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var page = Math.floor(clientRect.top / this.prop.pageSize.inner.height) + 1;
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var top = this.opt.margin[0] + clientRect.top % this.prop.pageSize.inner.height;
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var left = this.opt.margin[1] + clientRect.left;
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linkInfo.push({ page, top, left, clientRect, link });
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}
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}, this);
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}
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});
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};
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Worker.prototype.toPdf = function toPdf() {
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return orig.toPdf.call(this).then(function toPdf_hyperlink() {
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// Add hyperlinks if the option is enabled.
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if (this.opt.enableLinks) {
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// Attach each anchor tag based on info from toContainer().
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linkInfo.forEach(function(l) {
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this.prop.pdf.setPage(l.page);
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this.prop.pdf.link(l.left, l.top, l.clientRect.width, l.clientRect.height,
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{ url: l.link.href });
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}, this);
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// Reset the active page of the PDF to the final page.
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var nPages = this.prop.pdf.internal.getNumberOfPages();
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this.prop.pdf.setPage(nPages);
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}
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});
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};
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