MpdfAction.php

<?php
/**
 * Handles the 'mpdf' action.
 */

class MpdfAction extends Action {

	/**
	 * Return the name of the action this object responds to.
	 * @return string lowercase
	 */
	public function getName() {
		return 'mpdf';
	}

	/**
	 * The main action entry point. Do all output for display and send it
	 * to the context output.
	 */
	public function show() {
		global $wgMpdfSimpleOutput;

		$title = $this->getTitle();
		$output = $this->getOutput();
		$request = $this->getRequest();

		$titletext = $title->getPrefixedText();
		$filename = str_replace( [ '\\', '/', ':', '*', '?', '"', '<', '>', "\n", "\r", "\0" ], '_', $titletext );
		$article = new Article( $title );
		Hooks::run( 'MpdfGetArticle', [ $title, &$article ] );

		if ( $wgMpdfSimpleOutput ) {
			$article->render();
			ob_start();
			$output->output();
			$url = $title->getFullURL();
			$footer = "<p><em>$url</em></p><h1>$titletext</h1>\n";
			$html = $footer . ob_get_clean();
		} else {
			$output->setPrintable();
			$article->view();
			ob_start();
			$output->output();
			$html = ob_get_clean();
		}

		// Initialise PDF variables
		$format = $request->getText( 'format' );

		// If format=html in query-string, return html content directly
		if ( $format == 'html' ) {
			$output->disable();
			header( "Content-Type: text/html" );
			header( "Content-Disposition: attachment; filename=\"$filename.html\"" );
			print $html;
		} else {
			// return pdf file
			$mode = 'utf-8';
			$format = 'A4';
			$marginLeft = 15;
			$marginRight = 15;
			$marginTop = 16;
			$marginBottom = 16;
			$marginHeader = 9;
			$marginFooter = 9;
			$orientation = 'P';
			$constr1 = explode( '<!--mpdf<constructor', $html, 2 );
			if ( isset( $constr1[1] ) ) {
				list( $constr2 ) = explode( '/>', $constr1[1], 1 );
				$matches = [];
				if ( preg_match( '/format\s*=\s*"(.*?)"/', $constr2, $matches ) ) {
					$format = $matches[1];
				}
				if ( preg_match( '/margin-left\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
					$marginLeft = (float)$matches[1];
				}
				if ( preg_match( '/margin-right\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
					$marginRight = (float)$matches[1];
				}
				if ( preg_match( '/margin-top\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
						$marginTop = (float)$matches[1];
				}
				if ( preg_match( '/margin-bottom\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
					$marginBottom = (float)$matches[1];
				}
				if ( preg_match( '/margin-header\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
					$marginHeader = (float)$matches[1];
				}
				if ( preg_match( '/margin-footer\s*=\s*"?([0-9.]+)/', $constr2, $matches ) ) {
					$marginFooter = (float)$matches[1];
				}
				if ( preg_match( '/orientation\s*=\s*"(.*?)"/', $constr2, $matches ) ) {
					$orientation = $matches[1];
				}
			}
			$mpdf = new mPDF( $mode, $format, 0, '', $marginLeft, $marginRight, $marginTop, $marginBottom, $marginHeader, $marginFooter, $orientation );

			// Suppress warning messages, because the mPDF library
			// itself generates warnings (due to trying to add
			// variables with a value of 'auto'), and if these get
			// printed out, they can get into the PDF file and make
			// it unreadable.
			if ( function_exists( '\Wikimedia\suppressWarnings' ) ) {
				// MW 1.31+
				\Wikimedia\suppressWarnings();
			} else {
				wfSuppressWarnings();
			}
			$mpdf->WriteHTML( $html );
			if ( function_exists( '\Wikimedia\restoreWarnings' ) ) {
				// MW 1.31+
				\Wikimedia\restoreWarnings();
			} else {
				wfRestoreWarnings();
			}

			$mpdf->Output( $filename . '.pdf', 'D' );
		}
		$output->disable();
	}

}