mirror of
https://tildegit.org/sbgodin/HtmGem.git
synced 2023-08-25 13:53:12 +02:00
303 lines
10 KiB
PHP
303 lines
10 KiB
PHP
<?php
|
||
|
||
mb_internal_encoding("UTF-8");
|
||
mb_regex_encoding("UTF-8");
|
||
|
||
define("NARROW_NO_BREAK_SPACE", " ");
|
||
define("DASHES"
|
||
,"‒" # U+2012 Figure Dash
|
||
."–" # U+2013 En Dash
|
||
."—" # U+2014 Em Dash
|
||
."⸺" # U+2E3A Two-Em Dash
|
||
."⸻" # U+2E3B Three-Em Dash (Three times larger than a single char)
|
||
);
|
||
|
||
$url = @$_REQUEST["url"];
|
||
|
||
|
||
######################################## Installation page
|
||
if (empty($url)) {
|
||
if (!file_exists("index.gmi")) {
|
||
http_response_code(403);
|
||
die("<!-- index.gmi missing -->");
|
||
}
|
||
?>
|
||
<!DOCTYPE html>
|
||
<html lang="fr">
|
||
<head>
|
||
<title>Installation de HtmGem</title>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
<style>
|
||
<?php include("htmgem.css"); ?>
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<?php
|
||
echo translateGemToHtml(@file_get_contents("index.gmi"));
|
||
echo "</body>\n</html>\n";
|
||
die();
|
||
}
|
||
######################################## /Installation page
|
||
|
||
# Removes the trailling slash, to be sure there's not any.
|
||
$GMI_DIR = rtrim($_SERVER['DOCUMENT_ROOT'], "/");
|
||
$filePath = $GMI_DIR."/".$url;
|
||
|
||
$fileContents = @file_get_contents($filePath);
|
||
|
||
|
||
######################################## 404 page
|
||
if (empty($fileContents)) {
|
||
http_response_code(404); ?>
|
||
<!DOCTYPE html>
|
||
<html lang="fr">
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
<style>
|
||
<?php include("htmgem.css"); ?>
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<?php
|
||
$text404 = <<<EOF
|
||
# Page non trouvée
|
||
|
||
**$url**
|
||
|
||
=> $url rééssayer ?
|
||
=> / index
|
||
EOF;
|
||
echo translateGemToHtml($text404);
|
||
echo "</body>\n</html>";
|
||
die();
|
||
}
|
||
######################################## /404 page
|
||
|
||
# Removes the Byte Order Mark
|
||
$fileContents = preg_replace("/\xEF\xBB\xBF/", "", $fileContents);
|
||
|
||
|
||
/**
|
||
* 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) {
|
||
$output = $text;
|
||
|
||
# Replaces couples "__word__" into "<i>word</i>".
|
||
$output = mb_ereg_replace("${instruction}(.+?)${instruction}", "<{$markup}>\\1</{$markup}>", $output);
|
||
|
||
# Replaces a remaining __ into "<i>…</i>" to the end of the line.
|
||
$output = mb_ereg_replace("${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("\*\*", "strong", $line);
|
||
markupPreg("//", "em", $line);
|
||
markupPreg("~~", "del", $line);
|
||
}
|
||
|
||
/**
|
||
* Prepares the raw text to be displayed in HTML environment:
|
||
* * Escapes the HTML entities yet contained in the Gemtext.
|
||
* * Puts thin unbrakable spaces before some characters.
|
||
* @param $text1, $text2 texts to process
|
||
*/
|
||
function htmlPrepare(&$text) {
|
||
$text = htmlspecialchars($text, ENT_HTML5|ENT_NOQUOTES, "UTF-8", false);
|
||
$text = mb_ereg_replace("\ ([?!:;»€$])", NARROW_NO_BREAK_SPACE."\\1", $text);
|
||
$text = mb_ereg_replace("([«])\ ", "\\1".NARROW_NO_BREAK_SPACE, $text); # Espace fine insécable
|
||
|
||
# Warning: using a monospace font editor may not display dashes as they should be!
|
||
# Adds no-break spaces to stick the (EM/EN dashes) to words : aaaaaa – bb – ccccc ==> aaaaaa –$bb$– ccccc
|
||
$text = mb_ereg_replace("([".DASHES."]) ([^".DASHES.".]+) ([".DASHES."])", "\\1".NARROW_NO_BREAK_SPACE."\\2".NARROW_NO_BREAK_SPACE."\\3", $text);
|
||
|
||
# Adds no-break space to stick the (EM/EN dashes) to words : aaaaaa – bb. ==> aaaaaa –$bb.
|
||
$text = mb_ereg_replace("([—–]) ([^.]+).", "\\1".NARROW_NO_BREAK_SPACE."\\2.", $text);
|
||
}
|
||
|
||
function translateGemToHtml($fileContents) {
|
||
$fileLines = preg_split("/\n/", $fileContents);
|
||
ob_start();
|
||
$mode = null;
|
||
$mode_textAttributes = true;
|
||
foreach ($fileLines as $line) {
|
||
$reDoCount = 0;
|
||
$mode_textAttributes_temp = false;
|
||
while (true) {
|
||
if ($reDoCount>2) {
|
||
error_log("HtmGem: Too many loops, mode == '$mode'");
|
||
$mode = null;
|
||
$reDoCount = 0;
|
||
break;
|
||
}
|
||
$reDoCount += 1;
|
||
$line1 = substr($line, 0, 1); // $line can be modified
|
||
$line2 = substr($line, 0, 2); // in the meantime.
|
||
$line3 = substr($line, 0, 3);
|
||
if (is_null($mode)) {
|
||
if (empty($line)) {
|
||
echo "<p> </p>\n";
|
||
} elseif ('^^^' == $line3) {
|
||
if (preg_match("/^\^\^\^\s+(.*)$/", $line)) {
|
||
$mode_textAttributes = !$mode_textAttributes;
|
||
} else {
|
||
$mode = "raw";
|
||
continue;
|
||
}
|
||
} elseif ('^' == $line1 and !$mode_textAttributes_temp) {
|
||
preg_match("/^\^\s*(.*)$/", $line, $parts);
|
||
$line = $parts[1];
|
||
$mode_textAttributes_temp = true;
|
||
continue;
|
||
} elseif ("#" == $line1) {
|
||
preg_match("/^(#{1,3})\s*(.*)/", $line, $sharps);
|
||
$h_level = strlen($sharps[1]);
|
||
$text = $sharps[2];
|
||
htmlPrepare($text);
|
||
switch ($h_level) {
|
||
case 1: echo "<h1>".$text."</h1>\n"; break;
|
||
case 2: echo "<h2>".$text."</h2>\n"; break;
|
||
case 3: echo "<h3>".$text."</h3>\n"; break;
|
||
}
|
||
} elseif ("=>" == $line2) {
|
||
if (preg_match("/^=>\s*([^\s]+)(?:\s+(.*))?$/", $line, $linkParts)) {
|
||
$url_link = $linkParts[1];
|
||
$url_label = @$linkParts[2];
|
||
preg_match("/^([^:]+):/", $url_link, $matches);
|
||
$url_protocol = @$matches[1];
|
||
if (empty($url_protocol)) $url_protocol = "local";
|
||
if (empty(trim($url_label))) {
|
||
$url_label = $url_link;
|
||
} else {
|
||
// the label is humain-made, apply formatting
|
||
htmlPrepare($url_label);
|
||
}
|
||
echo "<p><a class='$url_protocol' href='$url_link'>$url_label</a></p>\n";
|
||
} else {
|
||
$mode = "raw";
|
||
continue;
|
||
}
|
||
} elseif ("```" == $line3) {
|
||
if (preg_match("/^```\s*(.*)$/", $line, $matches)) {
|
||
$alt_text = trim(@$matches[1]);
|
||
if (!(empty($alt_text))) {
|
||
echo "<pre alt='$alt_text' title='$alt_text'>\n";
|
||
} else {
|
||
echo "<pre>\n";
|
||
}
|
||
}
|
||
$mode="pre";
|
||
} elseif (">" == $line1) {
|
||
$mode = "quote";
|
||
preg_match("/^>\s*(.*)$/", $line, $quoteParts);
|
||
$quote = $quoteParts[1];
|
||
echo "<blockquote>\n";
|
||
if (empty($quote))
|
||
echo "<p> </p>\n";
|
||
else
|
||
htmlPrepare($quote);
|
||
if ($mode_textAttributes xor $mode_textAttributes_temp) addTextAttributes($line);
|
||
echo "<p>".$quote."</p>\n";
|
||
} elseif ("* " == $line2) {
|
||
echo "<ul>\n";
|
||
$mode = "ul";
|
||
continue;
|
||
} else {
|
||
$mode = "raw";
|
||
continue;
|
||
}
|
||
} else {
|
||
if ("raw"==$mode) {
|
||
htmlPrepare($line);
|
||
if ($mode_textAttributes xor $mode_textAttributes_temp) addTextAttributes($line);
|
||
if (empty($line)) $line = " ";
|
||
echo "<p>$line</p>\n";
|
||
$mode = null;
|
||
} elseif ("pre"==$mode) {
|
||
if ("```" == $line3) {
|
||
echo "</pre>\n";
|
||
$mode = null;
|
||
} else {
|
||
htmlPrepare($line);
|
||
echo $line."\n";
|
||
}
|
||
} elseif ("quote"==$mode) {
|
||
if (">" == $line1) {
|
||
preg_match("/^>\s*(.*)$/", $line, $quoteParts);
|
||
$quote = $quoteParts[1];
|
||
if (empty($quote))
|
||
echo "<p> </p>\n";
|
||
else
|
||
htmlPrepare($quote);
|
||
echo "<p>".$quote."</p>\n";
|
||
} else {
|
||
echo "</blockquote>\n";
|
||
$mode = null;
|
||
continue;
|
||
}
|
||
} elseif ("ul"==$mode) {
|
||
if ("* " == $line2) {
|
||
preg_match("/^\*\s*(.*)$/", $line, $ulParts);
|
||
$li = $ulParts[1];
|
||
if (empty($li)) {
|
||
echo "<li> \n";
|
||
} else {
|
||
htmlPrepare($li);
|
||
if ($mode_textAttributes xor $mode_textAttributes_temp) addTextAttributes($li);
|
||
echo "<li>".$li."\n";
|
||
}
|
||
} else {
|
||
echo "</ul>\n";
|
||
$mode = null;
|
||
continue;
|
||
}
|
||
} else {
|
||
die("Unexpected mode: $mode!");
|
||
}
|
||
}
|
||
break; // exits the while(true) as no continue occured
|
||
}
|
||
}
|
||
$html = ob_get_contents();
|
||
ob_clean();
|
||
return $html;
|
||
}
|
||
|
||
# Gets the page title: the first occurrence with # at the line start
|
||
mb_ereg("#\s*([^\n]+)\n", $fileContents, $matches);
|
||
$page_title = @$matches[1];
|
||
|
||
# <!-- link type="text/css" rel="StyleSheet" href="/htmgem.css" -->
|
||
echo <<<EOL
|
||
<!DOCTYPE html>
|
||
<html lang="fr">
|
||
<head>
|
||
<title>$page_title</title>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
<style>
|
||
|
||
EOL;
|
||
include("htmgem.css");
|
||
echo <<<EOL
|
||
</style>
|
||
</head>
|
||
<body>
|
||
EOL;
|
||
|
||
echo "\n".translateGemToHtml($fileContents);
|
||
echo "</body>\n</html>\n";
|
||
ob_end_flush();
|
||
|
||
?>
|