render.php

<?php
/*
	render.php is part of the PHP teletext viewer project, codenamed 'Non Editing Teletext Viewer' or NETV (NET-v)
	Display Functions
	Nathan Dane, 2018
*/
function lineRender($line,$control,$mpp)
{
	$lastesc=strpos($line,"\e");	// Find the first control code
	$lastesc++;
	$i=0;
	$dh="";	// Reset the double height flag
	$end="";	// Nothing to close yet
	$out="";	// Prepare the output buffer
	$everycode="";	// Once a background is declared, it should be on every code until it changes or is removed
	foreach ($control as $key => $code)
	{
		if (is_array($code[0]))
		{
			$count=0;
			$pre="f";
			$codesgroup=array();
			foreach($code as $process)
			{
				$last=($count-1);
				if ($process[0] == "]")
				{
					$codesgroup[$last][1]='b';
					$everycode=$codesgroup[$last][1].$codesgroup[$last][0];
				}
				else 
				{
					$control=codeControl($process[0]);	// This'll give us the html version of the code we need.
					array_push($codesgroup,array($control[0],'f'));
					$count++;
				}
			}
			$html=str_repeat(' ',$count).'<span class="';
			foreach($codesgroup as $process)
			{
				$html.="$process[1]$process[0] ";
			}
			$lastesc+=$count;
			$html.="$pre$control[0] ";
			$out.=$html;
			$out.="$everycode".'"> ';
			$thisesc=strpos($line,"\e",($lastesc));	// Add 'count': how many control codes there were in this group
			if ($thisesc === false) $thisesc=40;	// no more control codes, go to the end of the line
			$wait=substr($line,($lastesc),($thisesc-$lastesc));
			if ($control[1] === true)	// Is this a graphics code? 
				$out.=contiguousGraphics($wait,0);	// Convert the text to graphics
			else
				$out.=$wait;
			$lastesc=$thisesc;
			$lastesc++;	// Add one so that it doesn't include the esc
			$i++;
		}
		else
		{
			$control=codeControl($code[0]);	// This'll give us the html version of the code we need.
			if (is_array($control))
			{
				if ($i > 0) $end="</span>";	// If we've already done something, make sure to close it
				$thisesc=strpos($line,"\e",$lastesc);
				if ($thisesc === false) $thisesc=40;	// no more control codes, go to the end of the line
				$out.="$end".'<span class="f'."$control[0]$dh $everycode".'"> ';	// Add the control code 
				$wait=substr($line,$lastesc,($thisesc-$lastesc));	// and text to the output 'buffer'. NO, WAIT!!!
				if ($control[1] === true)	// Is this a graphics code? 
					$out.=contiguousGraphics($wait,0);	// Convert the text to graphics
					// Need to add option for seperated graphics here @todo
					// Also if this isn't graphics, nothing will get output. 
					// Not sure if this is a problem yet
				else
					$out.=$wait;
				$lastesc=$thisesc;
				$lastesc++;	// Add one so that it doesn't include the esc
				$i++;
				//$out.= "got called";
			}
			else
			{
				if ($i > 0) $end="</span>";	// If we've already done something, make sure to close it
				$thisesc=strpos($line,"\e",$lastesc);
				if ($thisesc === false) $thisesc=40;	// no more control codes, go to the end of the line
				if ($control!="dh") $start="f";
				$out.="$end".'<span class="'."$start$control$dh $everycode".'"> ';	// Add the control code 
				$out.=substr($line,$lastesc,($thisesc-$lastesc));	// and text to the output 'buffer'.
				$lastesc=$thisesc;
				$lastesc++;	// Add one so that it doesn't include the esc
				$i++;
				//$out.= "got called";
			}
			if ($control=="dh") $dh=" dh";
		}
	}
	$out=str_replace("`",'—',$out);	// Make dashes look right
	return $out;
}