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authorKlaus Weidenbach <Klaus.Weidenbach@gmx.net>2017-05-23 00:32:11 +0200
committerKlaus Weidenbach <Klaus.Weidenbach@gmx.net>2017-05-23 00:32:11 +0200
commit547df2219ab4b870256f2ed90e36b97d8bf200bf (patch)
tree3e990b35eb939911bb7949c2f5d633fa3d788faf /vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php
parent50e9d024581ddf57f37a6302bc089a88237657bb (diff)
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Replace Mardownify library with html-to-markdown library.
Diffstat (limited to 'vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php')
-rw-r--r--vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php124
1 files changed, 124 insertions, 0 deletions
diff --git a/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php b/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php
new file mode 100644
index 000000000..cf852bfcf
--- /dev/null
+++ b/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace League\HTMLToMarkdown\Converter;
+
+use League\HTMLToMarkdown\ElementInterface;
+
+class ParagraphConverter implements ConverterInterface
+{
+ /**
+ * @param ElementInterface $element
+ *
+ * @return string
+ */
+ public function convert(ElementInterface $element)
+ {
+ $value = $element->getValue();
+
+ $markdown = '';
+
+ $lines = preg_split('/\r\n|\r|\n/', $value);
+ foreach ($lines as $line) {
+ /*
+ * Some special characters need to be escaped based on the position that they appear
+ * The following function will deal with those special cases.
+ */
+ $markdown .= $this->escapeSpecialCharacters($line);
+ $markdown .= "\n";
+ }
+
+ return trim($markdown) !== '' ? rtrim($markdown) . "\n\n" : '';
+ }
+
+ /**
+ * @return string[]
+ */
+ public function getSupportedTags()
+ {
+ return array('p');
+ }
+
+ /**
+ * @param string $line
+ *
+ * @return string
+ */
+ private function escapeSpecialCharacters($line)
+ {
+ $line = $this->escapeFirstCharacters($line);
+ $line = $this->escapeOtherCharacters($line);
+ $line = $this->escapeOtherCharactersRegex($line);
+
+ return $line;
+ }
+
+ /**
+ * @param string $line
+ *
+ * @return string
+ */
+ private function escapeFirstCharacters($line)
+ {
+ $escapable = array(
+ '>',
+ '- ',
+ '+ ',
+ '--',
+ '~~~',
+ '---',
+ '- - -'
+ );
+
+ foreach ($escapable as $i) {
+ if (strpos(ltrim($line), $i) === 0) {
+ // Found a character that must be escaped, adding a backslash before
+ return '\\' . ltrim($line);
+ }
+ }
+
+ return $line;
+ }
+
+ /**
+ * @param string $line
+ *
+ * @return string
+ */
+ private function escapeOtherCharacters($line)
+ {
+ $escapable = array(
+ '<!--'
+ );
+
+ foreach ($escapable as $i) {
+ if (strpos($line, $i) !== false) {
+ // Found an escapable character, escaping it
+ $line = substr_replace($line, '\\', strpos($line, $i), 0);
+ }
+ }
+
+ return $line;
+ }
+
+ /**
+ * @param string $line
+ *
+ * @return string
+ */
+ private function escapeOtherCharactersRegex($line)
+ {
+ $regExs = array(
+ // Match numbers ending on ')' or '.' that are at the beginning of the line.
+ '/^[0-9]+(?=\)|\.)/'
+ );
+
+ foreach ($regExs as $i) {
+ if (preg_match($i, $line, $match)) {
+ // Matched an escapable character, adding a backslash on the string before the offending character
+ $line = substr_replace($line, '\\', strlen($match[0]), 0);
+ }
+ }
+
+ return $line;
+ }
+}