pastebin-embed.php

   1 <?php if (!defined('PmWiki')) exit();
   2
   3 $RecipeInfo['Pastebin Embed']['Version'] = '2017-12-27';
   4
   5 ## (:pastebin-embed:)
   6 Markup('pastebin-embed', '<fulltext', '/\\(:pastebin-embed\\s+(.+)\\s*:\\)/', 'PastebinEmbed');
   7
   8 SDV($PastebinEmbedHighlightStyle, "background-color: yellow;");
   9
  10 function PastebinEmbed ($m) {
  11         static $id = 1;
  12
  13         ## Parse arguments to the markup.
  14         $parsed = ParseArgs($m[1]);
  15
  16         ## These are the "bare" arguments (ones which don't require a key, just value(s)).
  17         $args = $parsed[''];
  18         $paste_id = $args[0];
  19         $noJS = in_array('no-js', $args);
  20         $noFooter = in_array('nofooter', $args);
  21         $noLineNumbers = in_array('nolinenums', $args);
  22         $raw = in_array('raw', $args);
  23         $noPre = in_array('no-pre', $args);
  24
  25         ## Convert the comma-delimited line ranges to an array containing each line to be
  26         ## included as values.
  27         ## Note that the line numbers will be zero-indexed (for use with raw text, etc.).
  28         $line_ranges = $parsed['lines'] ? explode(',', $parsed['lines']) : array();
  29         $line_numbers = array();
  30         $to_end_from = -1;
  31         foreach ($line_ranges as $key => $line_range) {
  32                 if (preg_match("/([0-9]+)[-–]([0-9]+)/", $line_range, $m)) {
  33                         $line_numbers = array_merge($line_numbers, range(--$m[1],--$m[2]));
  34                 } else if (preg_match("/([0-9]+)[-–]$/", $line_range, $m)) {
  35                         $line_numbers[] = $to_end_from = --$m[1];
  36                 } else {
  37                         $line_numbers[] = --$line_range;
  38                 }
  39         }
  40
  41         ## Same thing, but for highlighted line ranges.
  42         $hl_line_ranges = $parsed['hl'] ? explode(',', $parsed['hl']) : array();
  43         $hl_line_numbers = array();
  44         $hl_to_end_from = -1;
  45         foreach ($hl_line_ranges as $key => $hl_line_range) {
  46                 if (preg_match("/([0-9]+)[-–]([0-9]+)/", $hl_line_range, $m)) {
  47                         $hl_line_numbers = array_merge($hl_line_numbers, range(--$m[1],--$m[2]));
  48                 } else if (preg_match("/([0-9]+)[-–]$/", $hl_line_range, $m)) {
  49                         $hl_line_numbers[] = $hl_to_end_from = --$m[1];
  50                 } else {
  51                         $hl_line_numbers[] = --$hl_line_range;
  52                 }
  53         }
  54
  55         $embed_js_url = "https://pastebin.com/embed_js/$paste_id";
  56         $embed_iframe_url = "https://pastebin.com/embed_iframe/$paste_id";
  57         $embed_raw_url = "https://pastebin.com/raw/$paste_id";
  58
  59         $out = "<span class='pastebin-embed-error'>Unknown error.</span>";
  60
  61         ## There are three 'modes': raw (retrieve just the text, client-side, and insert it
  62         ## into the page), no-js (retrieve the HTML, server-side, and insert it into the
  63         ## page), and default (i.e., JS-based - insert the scriptlet, and let it retrieve and
  64         ## insert the HTML into the page, client-side & async).
  65         ## The mode is set by arguments to the (:pastebin-embed:) markup:
  66         ## - if neither the 'raw' nor the 'no-js' option is given, default (JS) mode is used
  67         ## - if the 'raw' option is given, raw mode is used
  68         ## - if the 'no-js' option is given, no-js mode is used
  69         if ($raw) {
  70                 $raw_text = file_get_contents($embed_raw_url);
  71                 if (!$raw_text) return Keep("<span class='pastebin-embed-error'>Could not retrieve paste!</span>");
  72
  73                 $raw_lines = explode("\n", $raw_text);
  74                 ## Convert HTML entities.
  75                 if (!$noPre) {
  76                         foreach ($raw_lines as $line)
  77                                 $line = PVSE($line);
  78                 }
  79                 ## Highlighting only works if no-pre is NOT enabled.
  80                 if (!empty($hl_line_numbers) && !$noPre) {
  81                         if ($hl_to_end_from >= 0)
  82                                 $hl_line_numbers = array_merge($hl_line_numbers, range($hl_to_end_from, count($raw_lines) - 1));
  83                         foreach ($hl_line_numbers as $l) {
  84                                 $raw_lines[$l] = "<span class='pastebin-embed-highlighted-line'>" . rtrim($raw_lines[$l]) . "</span>";
  85                         }
  86                 }
  87                 ## Filter by line number ranges, if specified.
  88                 if (!empty($line_numbers)) {
  89                         if ($to_end_from >= 0)
  90                                 $line_numbers = array_merge($line_numbers, range($to_end_from, count($raw_lines) - 1));
  91                         $raw_lines = array_intersect_key($raw_lines, array_flip($line_numbers));
  92                 }
  93                 $raw_text = implode("\n", $raw_lines);
  94
  95                 ## The 'no-pre' option means we shouldn't wrap the text in a <pre> tag.
  96                 $out = $noPre ? $raw_text : Keep("<pre class='escaped embedPastebinRaw' id='pastebinEmbed_$id'>\n" . $raw_text . "\n</pre>\n");
  97         } else if ($noJS) {
  98                 include_once('simple_html_dom.php');
  99
 100                 $content_html = file_get_html($embed_iframe_url);
 101                 if (!$content_html) return Keep("<span class='pastebin-embed-error'>Could not retrieve paste!</span>");
 102                 $content = $content_html->find(".embedPastebin", 0);
 103                 $content->id = "pastebinEmbed_$id";
 104
 105                 $styles_html = file_get_html($embed_js_url);
 106                 if (!$styles_html) return Keep("<span class='pastebin-embed-error'>Could not retrieve styles!</span>");
 107                 $styles = $styles_html->find("style", 0);
 108
 109                 ## Filter specified line ranges (if any have been specified via the lines=
 110                 ## parameter).
 111                 if (!empty($line_numbers)) {
 112                         $lines = $content_html->find(".embedPastebin > ol > li");
 113                         if ($to_end_from >= 0)
 114                                 $line_numbers = array_merge($line_numbers, range($to_end_from, count($lines) - 1));
 115                         foreach ($lines as $i => $line) {
 116                                 if (!in_array($i, $line_numbers))
 117                                         $line->outertext = '';
 118                                 else
 119                                         $line->value = ++$i;
 120                         }
 121                 }
 122
 123                 ## Highlight specified line ranges (if any have been specified via the hl=
 124                 ## parameter).
 125                 if (!empty($hl_line_numbers)) {
 126                         $lines = $content_html->find(".embedPastebin > ol > li");
 127                         if ($hl_to_end_from >= 0)
 128                                 $hl_line_numbers = array_merge($hl_line_numbers, range($hl_to_end_from, count($lines) - 1));
 129                         foreach ($lines as $i => $line) {
 130                                 if (in_array($i, $hl_line_numbers)) {
 131                                         $line->children(0)->class .= " pastebin-embed-highlighted-line";
 132                                 }
 133                         }
 134                 }
 135
 136                 $out = Keep($styles.$content);
 137         } else {
 138                 $out = Keep("<script id='pastebinEmbedScript_$id' src='$embed_js_url'></script>");
 139
 140                 if (!empty($hl_line_numbers) || !empty($line_numbers)) {
 141                         $line_numbers_js = "[ ".implode(", ",$line_numbers)." ]";
 142                         $hl_line_numbers_js = "[ ".implode(", ",$hl_line_numbers)." ]";
 143                         $out .= Keep("
 144 <script>
 145         var num_lines = document.querySelector('#pastebinEmbedScript_$id').parentElement.nextSibling.querySelectorAll('.embedPastebin > ol > li').length;
 146
 147         var line_numbers = $line_numbers_js;
 148         var to_end_from = $to_end_from;
 149         if (to_end_from >= 0)
 150                 line_numbers = [...line_numbers, ...[...Array(num_lines - to_end_from)].map((_, i) => to_end_from + i)];
 151
 152         var hl_line_numbers = $hl_line_numbers_js;
 153         var hl_to_end_from = $hl_to_end_from;
 154         if (hl_to_end_from >= 0)
 155                 hl_line_numbers = [...hl_line_numbers, ...[...Array(num_lines - hl_to_end_from)].map((_, i) => hl_to_end_from + i)];
 156
 157         document.querySelector('#pastebinEmbedScript_$id').parentElement.nextSibling.querySelectorAll('.embedPastebin > ol > li').forEach(function (line, i) {
 158                 // Highlight specified line ranges (if any have been specified via the hl= parameter).
 159                 if (hl_line_numbers.indexOf(i) != -1)
 160                         line.firstChild.className += ' pastebin-embed-highlighted-line';
 161
 162                 // Filter specified line ranges (if any have been specified via the lines= parameter).
 163                 if (line_numbers.length > 0) {
 164                         if (line_numbers.indexOf(i) == -1)
 165                                 line.parentElement.removeChild(line);
 166                         else
 167                                 line.value = ++i;
 168                 }
 169         });
 170 </script>
 171                         ");
 172                 }
 173
 174                 PastebinEmbedAppendFooter();
 175         }
 176
 177         global $HTMLStylesFmt;
 178         if (!$raw && $noFooter) {
 179                 $HTMLStylesFmt['pastebin-embed'][] = "#pastebinEmbed_$id .embedFooter { display: none; }\n";
 180         }
 181         if (!$raw && $noLineNumbers) {
 182                 $HTMLStylesFmt['pastebin-embed'][] = "#pastebinEmbed_$id > ol { padding-left: 5px; }\n";
 183         }
 184
 185         PastebinEmbedInjectStyles();
 186
 187         $id++;
 188         return $out;
 189 }
 190
 191 function PastebinEmbedAppendFooter() {
 192         static $ran_once = false;
 193         if (!$ran_once) {
 194                 global $HTMLFooterFmt;
 195                 $HTMLFooterFmt[] =
 196 "<script>
 197         document.querySelectorAll('div.embedPastebin').forEach(function (embed) {
 198                 if (embed.previousSibling && embed.previousSibling.tagName == 'P') {
 199                         embed.id = 'pastebinEmbed_' + embed.previousSibling.firstChild.id.substring(20);
 200                 }
 201         });
 202 </script>\n";
 203         }
 204         $ran_once = true;
 205 }
 206
 207 function PastebinEmbedInjectStyles() {
 208         static $ran_once = false;
 209         if (!$ran_once) {
 210                 global $HTMLStylesFmt, $PastebinEmbedHighlightStyle;
 211                 $styles = "
 212 .embedPastebinRaw .pastebin-embed-highlighted-line { $PastebinEmbedHighlightStyle display: inline-block; width: calc(100% + 4px); padding-left: 4px; margin-left: -4px; }
 213 .embedPastebin li .pastebin-embed-highlighted-line { $PastebinEmbedHighlightStyle }
 214 ";
 215                 $HTMLStylesFmt['pastebin-embed'][] = $styles;
 216         }
 217         $ran_once = true;
 218 }