First test to run pagedjs grom python.
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# Grafting a tree
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# Installation
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The prototype uses pagedjs-cli to convert the HTML into PDF. In a terminal `cd` into the cloned folder and run:
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`npm install pagedjs-cli`
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class delayedLoading extends Paged.Handler {
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// this let us call the methods from the the chunker, the polisher and the caller for the rest of the script
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constructor(chunker, polisher, caller) {
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super(chunker, polisher, caller);
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}
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beforeParsed (_) {
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document.body.appendChild(document.createTextNode('this text was inserted before the slow resolve'));
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return new Promise(function (resolve) {
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setTimeout(function () {
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document.body.appendChild(document.createTextNode('this text was inserted before pagedjs is loaded'));
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resolve();
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}, 2000);
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});
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}
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}
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Paged.registerHandlers(delayedLoading);
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Hello world</title>
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<style>
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h1 {
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string-set: runningheader content(text);
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page-break-after: right;
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}
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h2, h3, h4, h5, h6 {
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page-break-inside: avoid;
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page-break-after: avoid;
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}
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p {
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widows: 3;
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orphans: 3;
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}
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a {
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string-set: lastlink attr(href);
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}
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@page {
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/* width and height. In this case for an A5 */
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size: 148.5mm 210mm;
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/* Bigger bleed as weasyprint draws the cropmarks within the bleed*/
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@top-center {
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content: "Hello world example file";
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}
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@bottom-center {
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content: counter(page);
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}
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@top-left {
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color: red;
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font-size: 80%;
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content: string(runningheader);
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}
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@top-right {
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content: string(lastlink);
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}
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}
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@page:left {
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/* Only applied on left pages */
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margin-left: 40mm;
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}
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@page:right {
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/* Only applied on right pages */
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margin-right: 40mm;
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}
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</style>
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</head>
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<body>
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<h1>
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Hello world.
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</h1>
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<p>This document started as a <a href="http://osp.kitchen">website</a>.</p>
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<p>This is a second paragraph.</p>
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</body>
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</html>
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import subprocess
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import tempfile
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import os.path
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basepath = os.path.abspath(os.path.dirname(__file__))
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paged_bin = 'node_modules/pagedjs-cli/bin/paged'
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def run_pagedjs (path_html, path_pdf, cwd=None, extra_scripts=[]):
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args = [
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paged_bin
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]
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for script in extra_scripts:
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args.extend([
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'--additional-script',
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script
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])
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args.extend([
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'-o', path_pdf,
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path_html
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])
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try:
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return subprocess.check_output(args, cwd=cwd, stderr=subprocess.STDOUT).decode()
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except subprocess.CalledProcessError as e:
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return 'Error:\n{}'.format(e.output.decode())
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"""
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Generate a PDF based on provided HTML using pagedjs and returns the contents of
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the generated PDF.
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If optional path_out is provided the PDF is written there and the function returns the path.
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Optional extra_scripts is a list of strings with javascript.
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Scripts are sent in the same order to paged.js
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"""
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def make_pdf (html, path_out=None, extra_scripts=[]):
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with tempfile.TemporaryDirectory(prefix='algoliterary_publishing_house_') as tempdir:
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with tempfile.NamedTemporaryFile(dir=tempdir, mode='w', suffix='.html', delete=False) as temphtml:
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# Store html in a temporary file
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temphtml.write(html)
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temphtml.close()
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name_in = temphtml.name
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extra_scripts_tmp = []
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for script in extra_scripts:
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with tempfile.NamedTemporaryFile(dir=tempdir, mode='w', suffix='.js', delete=False) as tempjs:
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tempjs.write(script)
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tempjs.close()
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extra_scripts_tmp.append(tempjs.name)
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# Make a temporary file for the generated PDF
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with tempfile.NamedTemporaryFile(dir=tempdir, mode='w', suffix='.pdf', delete=False) as temppdf:
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temppdf.close()
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name_out = temppdf.name
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# Make the pdf
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run_pagedjs(name_in, name_out, cwd=basepath, extra_scripts=extra_scripts_tmp)
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if path_out:
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import shutil
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shutil.copy(name_out, path_out)
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return path_out
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else:
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with open(name_out) as generated_pdf:
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return generated_pdf.read()
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if __name__ == '__main__':
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with open(os.path.join(basepath, 'index.html'), 'r') as file_input:
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html = file_input.read()
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with open(os.path.join(basepath, 'delayedLoading.js'), 'r') as js_input:
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js = js_input.read()
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make_pdf(html, os.path.join(basepath, 'generated.pdf'), [ js ])
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