FEATURE: Added google chrome renderer to the plugin

classes/ChromePdfGenerator.php

@@ -0,0 +1,114 @@
+<?php
+
+namespace Initbiz\PDFGenerator\Classes;
+
+
+use Symfony\Component\Process\Process;
+use Symfony\Component\Process\Exception\ProcessFailedException;
+
+class ChromePdfGenerator
+{
+    protected  string $executable;
+    protected  array $options = ['--no-sandbox',
+        '--headless=new',
+        '--disable-gpu',
+        '--run-all-compositor-stages-before-draw',
+        '--virtual-time-budget=5000'];
+    protected  string $baseTemp;
+
+    public function __construct($storagePath = "app/tmp", $executable = "google-chrome-stable"){
+        // Prepare base temp directory
+        $this->executable = $executable;
+        $this->prepareBaseTemp($storagePath);
+        $this->prepareCatalog();
+    }
+
+    protected function prepareBaseTemp($storagePath){
+        $this->baseTemp = storage_path($storagePath);
+        if (!is_dir($this->baseTemp)) {
+            mkdir($this->baseTemp, 0755, true);
+        }
+    }
+
+    protected  function prepareCatalog(){
+        // Create isolated user-data-dir for Chrome
+        $userDataDir = $this->baseTemp . DIRECTORY_SEPARATOR . 'chrome_user_data';
+        if (!is_dir($userDataDir)) {
+            mkdir($userDataDir, 0700, true);
+        }
+        $this->options[] = '--user-data-dir=' . escapeshellarg($userDataDir);
+    }
+
+    protected function buildCliParams(array $options): array {
+        $params = [];
+
+        foreach ($options as $key => $value) {
+            if (is_bool($value)) {
+                if ($value) {
+                    $params[] = "--$key";
+                }
+            } else {
+                $params[] = "--$key=" . escapeshellarg($value);
+            }
+        }
+
+        return $params;
+    }
+
+    /**
+     * Generate a PDF from raw HTML using headless Chrome,
+     * ensuring a writable user-data directory and full completion.
+     *
+     * @param string $html The raw HTML content to convert.
+     * @param string $filename Desired PDF filename (with or without .pdf extension).
+     * @param array $options Optional Chrome CLI flags (without URL or --print-to-pdf).
+     * @return string            Full path to the generated PDF file in the temp folder.
+     * @throws \RuntimeException If PDF generation fails or output is missing.
+     */
+    public function generate(string $html, string $filename, array $options = []): string
+    {
+        // Create temporary HTML file
+        $htmlPath = $this->baseTemp . DIRECTORY_SEPARATOR . 'chrome_html_' . uniqid() . '.html';
+        file_put_contents($htmlPath, $html);
+
+        // Normalize PDF filename and ensure storage dir exists
+        $filename = pathinfo($filename, PATHINFO_EXTENSION) === 'pdf' ? $filename : $filename . '.pdf';
+        $outputPath = $filename;
+
+        // Default Chrome flags
+
+        $this->options[] = "--print-to-pdf=" . escapeshellarg($outputPath);
+
+        // Build full command and merge stderr/stdout
+        $cmd = array_merge([$this->executable], $this->options, $this->buildCliParams($options), [escapeshellarg($htmlPath)]);
+        $cmdString = implode(' ', $cmd) . ' 2>&1';
+        $process = Process::fromShellCommandline($cmdString);
+        $process->setTimeout(null);
+
+        // Ensure Chrome runs under a writable HOME
+        $process->setEnv(['HOME' => $this->baseTemp]);
+
+        try {
+            $process->mustRun();
+        } catch (ProcessFailedException $e) {
+            @unlink($htmlPath);
+            $output = trim($process->getErrorOutput() ?: $process->getOutput());
+            throw new \RuntimeException('PDF generation failed: ' . $e->getMessage() . '\nChrome output: ' . $output);
+        }
+
+        @unlink($htmlPath);
+
+        // Wait for any remaining Chrome child processes
+        if (!$process->isTerminated()) {
+            $process->wait();
+        }
+
+        // Verify output file
+        if (!file_exists($outputPath)) {
+            $msg = trim($process->getOutput() . ' ' . $process->getErrorOutput());
+            throw new \RuntimeException("PDF not found at {$outputPath}. Output: {$msg}");
+        }
+
+        return $outputPath;
+    }
+}

classes/PdfGenerator.php

@@ -20,6 +20,12 @@ class PdfGenerator
      */
     public $snappyPdf;
 
+    /**
+     * Google Chrome PDF class
+     * @var ChromePdfGenerator
+     */
+    public $googleChrome;
+
     /**
      * Twig layout of PDF path
      * @var string
@@ -63,21 +69,33 @@ class PdfGenerator
      */
     public function __construct($filename = 'generated', $layout = null)
     {
-        $this->snappyPdf = new Pdf();
+        // let snappy be default
+        $engine = Settings::get("pdf_engine", "snappy");
+
+        if ($engine=="snappy"){
+            $this->snappyPdf = new Pdf();
+
+            //By default the most resonable one is set
+            $binaryPath = Settings::get('pdf_binary', plugins_path('initbiz/pdfgenerator/vendor/bin/wkhtmltopdf-amd64'));
+            $binaryPath = ($binaryPath === "") ? plugins_path('initbiz/pdfgenerator/vendor/bin/wkhtmltopdf-amd64') : $binaryPath;
 
-        //By default the most resonable one is set
-        $binaryPath = Settings::get('pdf_binary', plugins_path('initbiz/pdfgenerator/vendor/bin/wkhtmltopdf-amd64'));
-        $binaryPath = ($binaryPath === "") ? plugins_path('initbiz/pdfgenerator/vendor/bin/wkhtmltopdf-amd64') : $binaryPath;
+            $pathAlias = substr($binaryPath, 0, 1);
 
-        $pathAlias = substr($binaryPath, 0, 1);
+            if ($pathAlias === '$') {
+                $binaryPath = plugins_path(substr($binaryPath, 1));
+            } elseif ($pathAlias === '~') {
+                $binaryPath = base_path(substr($binaryPath, 1));
+            }
 
-        if ($pathAlias === '$') {
-            $binaryPath = plugins_path(substr($binaryPath, 1));
-        } elseif ($pathAlias === '~') {
-            $binaryPath = base_path(substr($binaryPath, 1));
+            $this->snappyPdf->setBinary($binaryPath);
+        }
+
+        if($engine=="chrome"){
+            // reuse the binary settings entry, google-chrome-stable is the default binary on $PATH on debian.
+            $binary = Settings::get('pdf_binary', "google-chrome-stable");
+            $this->googleChrome = new ChromePdfGenerator(executable: $binary);
         }
 
-        $this->snappyPdf->setBinary($binaryPath);
 
         $this->filename = $filename;
 
@@ -127,7 +145,13 @@ public function generateFromTwig($layout, $localFileName, array $data = [])
     {
         $html = Twig::parse(File::get($layout), $data);
         $settings = Settings::instance();
-        $this->snappyPdf->generateFromHtml($html, $localFileName, $settings->getOptionsKeyValue());
+
+        // I am so sorry for this method of handling things :C
+        if($this->snappyPdf)
+            $this->snappyPdf->generateFromHtml($html, $localFileName, $settings->getOptionsKeyValue());
+
+        if($this->googleChrome)
+            $this->googleChrome->generate($html, $localFileName, $settings->getOptionsKeyValue());
 
         Event::fire('initbiz.pdfgenerator.afterGeneratePdf', [$this]);
     }

lang/en/lang.php

@@ -20,6 +20,10 @@
         'pdf_rm_older_than_comment' => 'In seconds time to store PDFs. By default 172800 - two days',
         'pdf_binary_label' => 'Binary path',
         'pdf_binary_comment' => 'Path to wkhtmltopdf, you can start the path with \~ (root path) or \$ (plugins path)',
+        'pdf_engine_label' => 'Engine Used',
+        'pdf_engine_comment' => 'Select the engine you want to use, Snappypdf is the reliable and secure pick. Google chrome is experimental, allows rendering modern js and css!',
+        'pdf_binary_comment_chrome' => 'Path of your google-chrome binary',
+        'pdf_generator_options_comment_chrome' => 'key-value pair for google chrome cli options',
     ],
     'permissions' => [
         'pdfgenerator_tab' => 'PDF Generator',

models/Settings.php

@@ -36,4 +36,21 @@ public function getOptionsKeyValue(): array
 
         return $parsed;
     }
+
+
+    public function filterFields($fields, $context = null)
+    {
+        $engine = post('pdf_engine', $this->pdf_engine);
+
+        // let it fail
+        try {
+            if ($engine === 'snappy') {
+                $fields->pdf_generator_options->commentAbove = 'initbiz.pdfgenerator::lang.settings.pdf_generator_options_comment';
+                $fields->pdf_binary->commentAbove = 'initbiz.pdfgenerator::lang.settings.pdf_binary_comment';
+            } else if ($engine === 'chrome') {
+                $fields->pdf_generator_options->commentAbove = 'initbiz.pdfgenerator::lang.settings.pdf_generator_options_comment_chrome';
+                $fields->pdf_binary->commentAbove = 'initbiz.pdfgenerator::lang.settings.pdf_binary_comment_chrome';
+            }
+        }catch (\Exception $ex){}
+    }
 }

models/settings/fields.yaml

@@ -13,14 +13,15 @@ tabs:
                     value:
                         type: text
                         span: auto
+            dependsOn: [pdf_engine]
 
         pdf_tokenize:
             label: initbiz.pdfgenerator::lang.settings.pdf_tokenize_label
             tab: initbiz.pdfgenerator::lang.settings.download_tab
             commentAbove: initbiz.pdfgenerator::lang.settings.pdf_tokenize_comment
             type: switch
             default: true
-            
+
         pdf_dir:
             label: initbiz.pdfgenerator::lang.settings.pdf_dir_label
             tab: initbiz.pdfgenerator::lang.settings.download_tab
@@ -56,3 +57,14 @@ tabs:
             label: initbiz.pdfgenerator::lang.settings.pdf_binary_label
             tab: initbiz.pdfgenerator::lang.settings.download_tab
             commentAbove: initbiz.pdfgenerator::lang.settings.pdf_binary_comment
+            dependsOn: [pdf_engine]
+
+        pdf_engine:
+            label: initbiz.pdfgenerator::lang.settings.pdf_engine_label
+            tab: initbiz.pdfgenerator::lang.settings.generator_tab
+            commentAbove: initbiz.pdfgenerator::lang.settings.pdf_engine_comment
+            type: dropdown
+            default: snappy
+            options:
+                snappy: SnappyPdf
+                chrome: Google Chrome (EXPERIMENTAL)

updates/version.yaml

@@ -18,3 +18,5 @@
     - 'downloadPdfDirectly to get PDFs using data-request-download without redirect and generator options in settings'
 1.2.0:
     - 'Allow generator options without value'
+1.3.0:
+    - 'Add support for google chrome rendering engine'