1
0
mirror of https://tildegit.org/sbgodin/HtmGem.git synced 2023-08-25 13:53:12 +02:00
HtmGem/htmgem.php
2021-03-03 16:07:56 +01:00

186 lines
5.9 KiB
PHP
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<?php
if (isset($_REQUEST["url"]))
$url = $_REQUEST["url"];
elseif (isset($_SERVER["QUERY_STRING"]))
$url = "/".$_SERVER["QUERY_STRING"];
else
$url = "/index.gmi";
$GMI_DIR = $_SERVER['DOCUMENT_ROOT'];
$filePath = $GMI_DIR.$url;
$fileContent = @file_get_contents($filePath);
if (!$fileContent) {
http_response_code(404);
die("404: $filePath $GMI_DIR $url");
}
$fileLines = preg_split("/\n/", $fileContent);
ob_start();
echo(<<<EOL
<!DOCTYPE html>
<html lang="fr">
<head>
<title>HTM Gem</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!-- link type="text/css" rel="StyleSheet" href="/htmgem.css" -->
<style>
EOL
);
include("htmgem.css");
echo(<<<EOL
</style>
</head>
<body>
EOL);
/**
* Replaces markups things like __underlined__ to <u>underlined</u>.
* @param $instruction the characters to replace, ex. _
* @param $markup the markup to replace to, ex. "u" to get <u>…</u>
* @param &$text where to replace.
*/
function markupPreg($instruction, $markup, &$text) {
#return preg_replace("#{$instruction}((?!{$instruction}.)+)(?:{$instruction})?#", "<{$markup}>$1</{$markup}>", $text);
$output = $text;
# Replaces couples "__word__" into "<i>word</i>".
$output = preg_replace("#${instruction}(.+?)${instruction}#", "<{$markup}>$1</{$markup}>", $output);
# Replaces a remaining __ into "<i>…</i>" to the end of the line.
$output = preg_replace("#${instruction}(.+)#", "<{$markup}>$1</{$markup}>", $output);
$text = $output;
}
/**
* Adds text attributes sucj as underline, bold, … to $line
* @param $line the line to process
*/
function addTextAttributes(&$line) {
markupPreg("__", "u", $line);
markupPreg("\*\*", "b", $line);
markupPreg("//", "i", $line);
markupPreg("~~", "del", $line);
}
/**
* Escapes the HTML entities yet contained in the Gemtext, keeps multiple spaces.
* @param $text1, $text2 texts to process
*/
function htmlEscape(&$text1, &$text2=null) {
$text1 = htmlspecialchars($text1, ENT_HTML5, "UTF-8", false);
# https://en.wikipedia.org/wiki/Whitespace_character#Unicode
$text1 = preg_replace("# #", "&puncsp;&puncsp;", $text1); #TODO: a way to not touch single spaces as "&ensp;" > " "
if (!is_null($text2)) return htmlEscape($text2);
}
$mode = null;
$mode_textAttributes = true;
foreach ($fileLines as $line) {
$reDo = true;
$line1 = substr($line, 0, 1);
$line2 = substr($line, 0, 2);
$line3 = substr($line, 0, 3);
while ($reDo) {
$reDo = false; # Change in modes need to redo one loop as they cant handle the case
if (is_null($mode)) {
if (empty($line)) {
print("<p>&nbsp;</p>\n");
} elseif ("#" == $line1) {
preg_match("/^(#{1,3})\s*(.*)/", $line, $sharps);
$h_level = strlen($sharps[1]);
$text = $sharps[2];
htmlEscape($text);
switch ($h_level) {
case 1: print("<h1>".$text."</h1>\n"); break;
case 2: print("<h2>".$text."</h2>\n"); break;
case 3: print("<h3>".$text."</h3>\n"); break;
}
} elseif ("=>" == $line2) {
preg_match("/^=>\s*([^\s]+)\s*(.*)$/", $line, $linkParts);
$url_link = $linkParts[1];
$url_label = $linkParts[2];
if (empty($url_label)) $url_label = $url_link;
htmlEscape($url_link, $url_label);
if ($mode_textAttributes) addTextAttributes($url_label);
print("<p><a href='".$url_link."'>".$url_label."</a></p>\n");
} elseif ('"""' == $line3) {
$mode_textAttributes = !$mode_textAttributes;
$reDo = true;
} elseif ("```" == $line3) {
$mode="pre";
print("<pre>\n");
} elseif (">" == $line1) {
$mode = "quote";
preg_match("/^>\s*(.*)$/", $line, $quoteParts);
$quote = $quoteParts[1];
print("<blockquote>\n");
if (empty($quote))
print("<p>&nbsp;</p>\n");
else
htmlEscape($quote);
print("<p>".$quote."</p>\n");
} elseif ("*" == $line1 && "**" != $line2) {
$mode = "ul";
$reDo = true;
print("<ul>\n");
} else {
htmlEscape($line);
if ($mode_textAttributes) addTextAttributes($line);
print("<p>$line</p>\n");
}
} elseif ("pre"==$mode) {
if ("```" == $line3) {
$mode=null;
print("</pre>\n");
} else {
htmlEscape($line);
if ($mode_textAttributes) addTextAttributes($line);
print($line."\n");
}
} elseif ("quote"==$mode) {
if (">" == $line1) {
preg_match("/^>\s*(.*)$/", $line, $quoteParts);
$quote = $quoteParts[1];
if (empty($quote))
print("<p>&nbsp;</p>\n");
else
htmlEscape($quote);
print("<p>".$quote."</p>\n");
} else {
print("</blockquote>\n");
$mode=null;
$reDo=true;
}
} elseif ("ul"==$mode) {
if ("*" == $line1 && "**" != $line2) {
preg_match("/^\*\s*(.*)$/", $line, $ulParts);
$li = $ulParts[1];
if (empty($li))
print("<li>&nbsp;\n");
else
htmlEscape($li);
print("<li>".$li."\n");
} else {
$mode = null;
print("</ul>\n");
$reDo = true;
}
}
$line = "";
}
}
echo "</body>\n</html>\n";
ob_end_flush();
?>