Initial commit

pastebin-embed.php

+<?php if (!defined('PmWiki')) exit();
+
+$RecipeInfo['Pastebin Embed']['Version'] = '2017-12-27';
+
+## (:pastebin-embed:)
+Markup('pastebin-embed', '<fulltext', '/\\(:pastebin-embed\\s+(.+)\\s*:\\)/', 'PastebinEmbed');
+
+SDV($PastebinEmbedHighlightStyle, "background-color: yellow;");
+
+function PastebinEmbed ($m) {
+	static $id = 1;
+	
+	## Parse arguments to the markup.
+	$parsed = ParseArgs($m[1]);
+
+	## These are the "bare" arguments (ones which don't require a key, just value(s)).	
+	$args = $parsed[''];
+	$paste_id = $args[0];
+	$noJS = in_array('no-js', $args);
+	$noFooter = in_array('nofooter', $args);
+	$noLineNumbers = in_array('nolinenums', $args);
+	$raw = in_array('raw', $args);
+	$noPre = in_array('no-pre', $args);
+	
+	## Convert the comma-delimited line ranges to an array containing each line to be
+	## included as values.
+	## Note that the line numbers will be zero-indexed (for use with raw text, etc.).
+	$line_ranges = $parsed['lines'] ? explode(',', $parsed['lines']) : array();
+	$line_numbers = array();
+	$to_end_from = -1;
+	foreach ($line_ranges as $key => $line_range) {
+		if (preg_match("/([0-9]+)[-–]([0-9]+)/", $line_range, $m)) {
+			$line_numbers = array_merge($line_numbers, range(--$m[1],--$m[2]));
+		} else if (preg_match("/([0-9]+)[-–]$/", $line_range, $m)) {
+			$line_numbers[] = $to_end_from = --$m[1];
+		} else {
+			$line_numbers[] = --$line_range;
+		}
+	}
+	
+	## Same thing, but for highlighted line ranges.
+	$hl_line_ranges = $parsed['hl'] ? explode(',', $parsed['hl']) : array();
+	$hl_line_numbers = array();
+	$hl_to_end_from = -1;
+	foreach ($hl_line_ranges as $key => $hl_line_range) {
+		if (preg_match("/([0-9]+)[-–]([0-9]+)/", $hl_line_range, $m)) {
+			$hl_line_numbers = array_merge($hl_line_numbers, range(--$m[1],--$m[2]));
+		} else if (preg_match("/([0-9]+)[-–]$/", $hl_line_range, $m)) {
+			$hl_line_numbers[] = $hl_to_end_from = --$m[1];
+		} else {
+			$hl_line_numbers[] = --$hl_line_range;
+		}
+	}
+	
+	$embed_js_url = "https://pastebin.com/embed_js/$paste_id";
+	$embed_iframe_url = "https://pastebin.com/embed_iframe/$paste_id";
+	$embed_raw_url = "https://pastebin.com/raw/$paste_id";
+	
+	$out = "<span class='pastebin-embed-error'>Unknown error.</span>";
+	
+	## There are three 'modes': raw (retrieve just the text, client-side, and insert it
+	## into the page), no-js (retrieve the HTML, server-side, and insert it into the 
+	## page), and default (i.e., JS-based - insert the scriptlet, and let it retrieve and 
+	## insert the HTML into the page, client-side & async).
+	## The mode is set by arguments to the (:pastebin-embed:) markup:
+	## - if neither the 'raw' nor the 'no-js' option is given, default (JS) mode is used
+	## - if the 'raw' option is given, raw mode is used
+	## - if the 'no-js' option is given, no-js mode is used
+	if ($raw) {
+		$raw_text = file_get_contents($embed_raw_url);
+		if (!$raw_text) return Keep("<span class='pastebin-embed-error'>Could not retrieve paste!</span>");
+		
+		$raw_lines = explode("\n", $raw_text);
+		## Convert HTML entities.
+		if (!$noPre) {
+			foreach ($raw_lines as $line)
+				$line = PVSE($line);
+		}
+		## Highlighting only works if no-pre is NOT enabled.
+		if (!empty($hl_line_numbers) && !$noPre) {
+			if ($hl_to_end_from >= 0)
+				$hl_line_numbers = array_merge($hl_line_numbers, range($hl_to_end_from, count($raw_lines) - 1));
+			foreach ($hl_line_numbers as $l) {
+				$raw_lines[$l] = "<span class='pastebin-embed-highlighted-line'>" . rtrim($raw_lines[$l]) . "</span>";
+			}
+		}
+		## Filter by line number ranges, if specified.
+		if (!empty($line_numbers)) {			
+			if ($to_end_from >= 0)
+				$line_numbers = array_merge($line_numbers, range($to_end_from, count($raw_lines) - 1));
+			$raw_lines = array_intersect_key($raw_lines, array_flip($line_numbers));
+		}
+		$raw_text = implode("\n", $raw_lines);
+		
+		## The 'no-pre' option means we shouldn't wrap the text in a <pre> tag.
+		$out = $noPre ? $raw_text : Keep("<pre class='escaped embedPastebinRaw' id='pastebinEmbed_$id'>\n" . $raw_text . "\n</pre>\n");
+	} else if ($noJS) {
+		include_once('simple_html_dom.php');
+		
+		$content_html = file_get_html($embed_iframe_url);
+		if (!$content_html) return Keep("<span class='pastebin-embed-error'>Could not retrieve paste!</span>");
+		$content = $content_html->find(".embedPastebin", 0);
+		$content->id = "pastebinEmbed_$id";
+		
+		$styles_html = file_get_html($embed_js_url);
+		if (!$styles_html) return Keep("<span class='pastebin-embed-error'>Could not retrieve styles!</span>");
+		$styles = $styles_html->find("style", 0);
+		
+		## Filter specified line ranges (if any have been specified via the lines= 
+		## parameter).
+		if (!empty($line_numbers)) {
+			$lines = $content_html->find(".embedPastebin > ol > li");
+			if ($to_end_from >= 0)
+				$line_numbers = array_merge($line_numbers, range($to_end_from, count($lines) - 1));
+			foreach ($lines as $i => $line) {
+				if (!in_array($i, $line_numbers))
+					$line->outertext = '';
+				else
+					$line->value = ++$i;
+			}
+		}
+		
+		## Highlight specified line ranges (if any have been specified via the hl= 
+		## parameter).
+		if (!empty($hl_line_numbers)) {
+			$lines = $content_html->find(".embedPastebin > ol > li");
+			if ($hl_to_end_from >= 0)
+				$hl_line_numbers = array_merge($hl_line_numbers, range($hl_to_end_from, count($lines) - 1));
+			foreach ($lines as $i => $line) {
+				if (in_array($i, $hl_line_numbers)) {
+					$line->children(0)->class .= " pastebin-embed-highlighted-line";
+				}
+			}
+		}
+		
+		$out = Keep($styles.$content);
+	} else {
+		$out = Keep("<script id='pastebinEmbedScript_$id' src='$embed_js_url'></script>");
+
+		if (!empty($hl_line_numbers) || !empty($line_numbers)) {
+			$line_numbers_js = "[ ".implode(", ",$line_numbers)." ]";
+			$hl_line_numbers_js = "[ ".implode(", ",$hl_line_numbers)." ]";
+			$out .= Keep("
+<script>
+	var num_lines = document.querySelector('#pastebinEmbedScript_$id').parentElement.nextSibling.querySelectorAll('.embedPastebin > ol > li').length;
+	
+	var line_numbers = $line_numbers_js;	
+	var to_end_from = $to_end_from;
+	if (to_end_from >= 0)
+		line_numbers = [...line_numbers, ...[...Array(num_lines - to_end_from)].map((_, i) => to_end_from + i)];
+
+	var hl_line_numbers = $hl_line_numbers_js;
+	var hl_to_end_from = $hl_to_end_from;
+	if (hl_to_end_from >= 0)
+		hl_line_numbers = [...hl_line_numbers, ...[...Array(num_lines - hl_to_end_from)].map((_, i) => hl_to_end_from + i)];
+
+	document.querySelector('#pastebinEmbedScript_$id').parentElement.nextSibling.querySelectorAll('.embedPastebin > ol > li').forEach(function (line, i) {
+		// Highlight specified line ranges (if any have been specified via the hl= parameter).
+		if (hl_line_numbers.indexOf(i) != -1)
+			line.firstChild.className += ' pastebin-embed-highlighted-line';
+
+		// Filter specified line ranges (if any have been specified via the lines= parameter).
+		if (line_numbers.length > 0) {
+			if (line_numbers.indexOf(i) == -1)
+				line.parentElement.removeChild(line);
+			else
+				line.value = ++i;
+		}
+	});
+</script>
+			");
+		}
+		
+		PastebinEmbedAppendFooter();
+	}
+	
+	global $HTMLStylesFmt;
+	if (!$raw && $noFooter) {
+		$HTMLStylesFmt['pastebin-embed'][] = "#pastebinEmbed_$id .embedFooter { display: none; }\n";
+	}
+	if (!$raw && $noLineNumbers) {
+		$HTMLStylesFmt['pastebin-embed'][] = "#pastebinEmbed_$id > ol { padding-left: 5px; }\n";
+	}
+	
+	PastebinEmbedInjectStyles();
+	
+	$id++;
+	return $out;
+}
+
+function PastebinEmbedAppendFooter() {
+	static $ran_once = false;
+	if (!$ran_once) {
+		global $HTMLFooterFmt;
+		$HTMLFooterFmt[] = 
+"<script>
+	document.querySelectorAll('div.embedPastebin').forEach(function (embed) {
+		if (embed.previousSibling && embed.previousSibling.tagName == 'P') {
+			embed.id = 'pastebinEmbed_' + embed.previousSibling.firstChild.id.substring(20);
+		}
+	});
+</script>\n";
+	}
+	$ran_once = true;
+}
+
+function PastebinEmbedInjectStyles() {
+	static $ran_once = false;
+	if (!$ran_once) {
+		global $HTMLStylesFmt, $PastebinEmbedHighlightStyle;
+		$styles = "
+.embedPastebinRaw .pastebin-embed-highlighted-line { $PastebinEmbedHighlightStyle display: inline-block; width: calc(100% + 4px); padding-left: 4px; margin-left: -4px; }
+.embedPastebin li .pastebin-embed-highlighted-line { $PastebinEmbedHighlightStyle }
+";
+		$HTMLStylesFmt['pastebin-embed'][] = $styles;
+	}
+	$ran_once = true;
+}