<?php
require('../fpdf.php');

class PDF extends Itdatex_EInvoiceCore_Vendor_FPDF
{
	protected $B = 0;
	protected $I = 0;
	protected $U = 0;
	protected $HREF = '';

	function WriteHTML($html)
	{
		// HTML parser
		$html = str_replace("\n", ' ', $html);
		$a = preg_split('/<(.*)>/U', $html, -1, PREG_SPLIT_DELIM_CAPTURE);
		foreach($a as $i=>$e)
		{
			if($i%2==0)
			{
				// Text
				if($this->HREF)
					$this->PutLink($this->HREF, $e);
				else
					$this->Write(5, $e);
			}
			else
			{
				// Tag
				if($e[0]=='/')
					$this->CloseTag(strtoupper(substr($e, 1)));
				else
				{
					// Extract attributes
					$a2 = explode(' ', $e);
					$tag = strtoupper(array_shift($a2));
					$attr = array();
					foreach($a2 as $v)
					{
						if(preg_match('/([^=]*)=["\']?([^"\']*)/', $v, $a3))
							$attr[strtoupper($a3[1])] = $a3[2];
					}
					$this->OpenTag($tag, $attr);
				}
			}
		}
	}

	function OpenTag($tag, $attr)
	{
		// Opening tag
		if($tag=='B' || $tag=='I' || $tag=='U')
			$this->SetStyle($tag, true);
		if($tag=='A')
			$this->HREF = $attr['HREF'];
		if($tag=='BR')
			$this->Ln(5);
	}

	function CloseTag($tag)
	{
		// Closing tag
		if($tag=='B' || $tag=='I' || $tag=='U')
			$this->SetStyle($tag, false);
		if($tag=='A')
			$this->HREF = '';
	}

	function SetStyle($tag, $enable)
	{
		// Modify style and select corresponding font
		$this->$tag += ($enable ? 1 : -1);
		$style = '';
		foreach(array('B', 'I', 'U') as $s)
		{
			if($this->$s>0)
				$style .= $s;
		}
		$this->SetFont('', $style);
	}

	function PutLink($URL, $txt)
	{
		// Put a hyperlink
		$this->SetTextColor(0, 0, 255);
		$this->SetStyle('U', true);
		$this->Write(5, $txt, $URL);
		$this->SetStyle('U', false);
		$this->SetTextColor(0);
	}
}

$html = 'You can now easily print text mixing different styles: <b>bold</b>, <i>italic</i>,
<u>underlined</u>, or <b><i><u>all at once</u></i></b>!<br><br>You can also insert links on
text, such as <a href="https://www.fpdf.org">www.fpdf.org</a>, or on an image: click on the logo.';

$pdf = new PDF();
// First page
$pdf->AddPage();
$pdf->SetFont('Arial', '', 20);
$pdf->Write(5, "To find out what's new in this tutorial, click ");
$pdf->SetFont('', 'U');
$link = $pdf->AddLink();
$pdf->Write(5, 'here', $link);
$pdf->SetFont('');
// Second page
$pdf->AddPage();
$pdf->SetLink($link);
$pdf->Image('logo.png', 10, 12, 30, 0, '', 'https://www.fpdf.org');
$pdf->SetLeftMargin(45);
$pdf->SetFontSize(14);
$pdf->WriteHTML($html);
$pdf->Output();
?>
