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mirror of https://github.com/erusev/parsedown.git synced 2023-08-10 21:13:06 +03:00

remove "parse_blocks" method in favor of a more capable "parse_lines"

This commit is contained in:
Emanuil 2013-09-18 00:27:35 +03:00
parent bc27850c41
commit 238b1029c0

View File

@ -89,7 +89,10 @@ class Parsedown
# ~ # ~
$text = $this->parse_blocks($text); $text = trim($text, "\n");
$text = preg_replace('/\n\s*\n/', "\n\n", $text);
$text = $this->parse_lines($text);
# Decodes escape sequences (leaves out backslashes). # Decodes escape sequences (leaves out backslashes).
@ -107,267 +110,113 @@ class Parsedown
# Private Methods # Private Methods
# #
private function parse_blocks($text) private function parse_lines($text, $context = null)
{ {
$text = trim($text, "\n");
# Divides text into blocks.
$blocks = preg_split('/\n\s*\n/', $text);
# Makes sure compound blocks get rendered.
$blocks []= NULL;
$markup = '';
# Parses blocks.
foreach ($blocks as $block)
{
if (isset($block) and $block[0] >= 'A')
{
$quick_block = $block;
unset($block);
}
# List
if (isset($block) and preg_match('/^([ ]{0,3})(\d+[.]|[*+-])[ ]/', $block, $matches)) # list item
{
if (isset($list)) # subsequent
{
$list .= "\n\n".$block;
}
else # first
{
$list = $block;
$list_indentation = strlen($matches[1]);
list($list_type, $list_marker_pattern) = ($matches[2] === '-' or $matches[2] === '+' or $matches[2] === '*')
? array('ul', '[*+-]')
: array('ol', '\d+[.]');
}
unset($block);
}
elseif (isset($block) and isset($list) and $block[0] === ' ') # list item block
{
$list .= "\n\n".$block;
unset($block);
}
elseif (isset($list))
{
$markup .= '<'.$list_type.'>'."\n";
$list_items = preg_split('/^([ ]{'.$list_indentation.'})'.$list_marker_pattern.'[ ]/m', $list, -1, PREG_SPLIT_NO_EMPTY);
foreach ($list_items as $list_item)
{
$markup .= '<li>';
if (strpos($list_item, "\n\n")) # sparse
{
$list_item = trim($list_item, "\n");
if (strpos($list_item, "\n\n"))
{
$list_item = preg_replace('/^[ ]{0,4}/m', '', $list_item);
$list_item = $this->parse_blocks($list_item);
}
else
{
$list_item = $this->parse_lines($list_item, TRUE);
}
$markup .= "\n".$list_item;
}
else # dense
{
$list_item = trim($list_item, "\n");
$list_item = strpos($list_item, "\n")
? $this->parse_lines($list_item)
: $this->parse_inline_elements($list_item);
$markup .= $list_item;
}
$markup .= '</li>'."\n";
}
$markup .= '</'.$list_type.'>'."\n";
unset($list);
}
# Code Block
if (isset($block) and strlen($block) > 4 and $block[0] === ' ' and $block[1] === ' ' and $block[2] === ' ' and $block[3] === ' ')
{
if (isset($code_block))
{
$code_block .= "\n\n".$block;
}
else
{
$code_block = $block;
}
unset($block);
}
elseif (isset($code_block))
{
$code_block_text = preg_replace('/^[ ]{4}/m', '', $code_block);
$code_block_text = htmlentities($code_block_text, ENT_NOQUOTES);
# Decodes encoded escape sequences if present.
strpos($code_block_text, "\x1A\\") !== FALSE and $code_block_text = strtr($code_block_text, $this->escape_sequence_map);
$markup .= '<pre><code>'.$code_block_text.'</code></pre>'."\n";
unset($code_block);
}
# Atx Heading
if (isset($block) and $block[0] === '#' and preg_match('/^(#{1,6})[ ]*(.+?)[ ]*#*$/', $block, $matches))
{
$level = strlen($matches[1]);
$heading = $this->parse_inline_elements($matches[2]);
$markup .= '<h'.$level.'>'.$heading.'</h'.$level.'>'."\n";
continue;
}
# Quote Block
if (isset($block) and preg_match('/^[ ]{0,3}>/', $block))
{
$block = preg_replace('/^[ ]{0,3}>[ ]?/m', '', $block);
$block = $this->parse_blocks($block);
$markup .= '<blockquote>'."\n".$block.'</blockquote>'."\n";
continue;
}
# Horizontal Line
if (isset($block) and preg_match('/^[ ]{0,3}([-*_])([ ]{0,2}\1){2,}$/', $block))
{
$markup .= '<hr />'."\n";
continue;
}
# ~
if (isset($quick_block))
{
$block = $quick_block;
unset ($quick_block);
}
#
# Paragraph
if (isset($block))
{
if (strpos($block, "\n"))
{
$markup .= $this->parse_lines($block, TRUE);
}
else
{
$element_text = $this->parse_inline_elements($block);
$element = '<p>'.$element_text.'</p>'."\n";
$markup .= $element;
}
}
}
return $markup;
}
private function parse_lines($text, $paragraph_based = FALSE)
{
$text = trim($text, "\n");
$lines = explode("\n", $text); $lines = explode("\n", $text);
$lines []= NULL; $lines []= NULL;
$line_count = count($lines);
$markup = ''; $markup = '';
foreach ($lines as $line) foreach ($lines as $index => $line)
{ {
if (isset($line) and $line === '') # Quick Line
{
unset($line);
}
# Paragraph if (isset($line) and $line !== '' and $line[0] >= 'A')
if (isset($line) and $line[0] >= 'A')
{ {
$quick_line = $line; $quick_line = $line;
unset($line); unset($line);
} }
# Setext Heading (-)
if (isset($line) and $line !== '' and isset($paragraph) and preg_match('/^[-]+[ ]*$/', $line))
{
$setext_heading_text = $this->parse_inline_elements($paragraph);
$markup .= '<h2>'.$setext_heading_text.'</h2>'."\n";
unset($paragraph, $line);
continue;
}
# Rule
if (isset($line) and preg_match('/^[ ]{0,3}([-*_])([ ]{0,2}\1){2,}[ ]*$/', $line))
{
$rule = true;
unset($line);
}
elseif (isset($rule))
{
$markup .= '<hr />'."\n";
unset($rule);
}
# List # List
if (isset($line) and preg_match('/^([ ]*)(\d+[.]|[*+-])[ ](.*)/', $line, $matches)) # list item # Unlike other types, consequent lines of type "list items" may not
# belong to the same block.
if (isset($line) and $line !== '' and preg_match('/^([ ]{0,3})(\d+[.]|[*+-])[ ](.*)/', $line, $matches)) # list item
{ {
$list_item_indentation = strlen($matches[1]); $list_item_indentation = $matches[1];
$list_item_type = ($matches[2] === '-' or $matches[2] === '+' or $matches[2] === '*') $list_item_type = ($matches[2] === '-' or $matches[2] === '+' or $matches[2] === '*')
? 'ul' ? 'ul'
: 'ol'; : 'ol';
if (isset($list)) # subsequent if (isset($list_items)) # subsequent
{ {
if ($list_item_indentation === $list_indentation and $list_item_type === $list_type) if ($list_item_indentation === $list_indentation and $list_item_type === $list_type)
{ {
# Adds last list item to the list. $list_items []= $list_item;
$list []= $list_item;
# Creates a separate list item.
$list_item = $matches[3]; $list_item = $matches[3];
} }
else else
{ {
# Adds line to the current list item.
$list_item .= "\n".$line; $list_item .= "\n".$line;
} }
} }
else # first else # first
{ {
$list = array();
$list_indentation = $list_item_indentation; $list_indentation = $list_item_indentation;
$list_type = $list_item_type; $list_type = $list_item_type;
$list_item = $matches[3]; $list_item = $matches[3];
$list_items = array();
} }
unset($line); unset($line);
} }
else elseif (isset($list_items)) # incomplete list item
{ {
if (isset($list)) if (isset($line) and ($line === '' or $line[0] === ' '))
{ {
$list []= $list_item; $line and $line = preg_replace('/^[ ]{0,4}/', '', $line);;
$list_item .= "\n".$line;
unset($line);
}
else # line is consumed or does not belong to the list item
{
$list_item = rtrim($list_item, "\n");
$list_items []= $list_item;
$markup .= '<'.$list_type.'>'."\n"; $markup .= '<'.$list_type.'>'."\n";
foreach ($list as $list_item) foreach ($list_items as $list_item)
{ {
$list_item_text = strpos($list_item, "\n") $list_item_text = strpos($list_item, "\n") !== false
? $this->parse_lines($list_item) ? $this->parse_lines($list_item, 'li')
: $this->parse_inline_elements($list_item); : $this->parse_inline_elements($list_item);
$markup .= '<li>'.$list_item_text.'</li>'."\n"; $markup .= '<li>'.$list_item_text.'</li>'."\n";
@ -375,47 +224,87 @@ class Parsedown
$markup .= '</'.$list_type.'>'."\n"; $markup .= '</'.$list_type.'>'."\n";
unset($list); unset($list_items);
}
}
# Code Block
if (isset($line) and $line !== '' and preg_match('/^[ ]{4}(.*)/', $line, $matches))
{
if (isset($code_block))
{
$code_block .= "\n".$matches[1];
}
else
{
$code_block = $matches[1];
}
unset($line);
}
elseif (isset($code_block))
{
if (isset($line) and $line === '')
{
$code_block .= "\n";
# » continue;
}
else
{
$code_block = rtrim($code_block);
$code_block_text = htmlentities($code_block, ENT_NOQUOTES);
# Decodes encoded escape sequences if present.
strpos($code_block_text, "\x1A\\") !== FALSE and $code_block_text = strtr($code_block_text, $this->escape_sequence_map);
$markup .= '<pre><code>'.$code_block_text.'</code></pre>'."\n";
unset($code_block);
} }
} }
# Quote Block # Quote Block
if (isset($line) and preg_match('/^[ ]*>[ ]?(.*)/', $line, $matches)) if (isset($line) and $line !== '' and preg_match('/^[ ]*>[ ]?(.*)/', $line, $matches))
{ {
if (isset($quote)) if (isset($blockquote))
{ {
$quote .= "\n".$matches[1]; $blockquote .= "\n".$matches[1];
$blockquote_is_multiline = true;
} }
else else
{ {
$quote = $matches[1]; $blockquote = $matches[1];
$blockquote_is_multiline = false;
} }
unset($line); unset($line);
} }
else elseif (isset($blockquote))
{ {
if (isset($quote)) if (isset($line) and $line === '')
{ {
$quote = $this->parse_blocks($quote); $blockquote .= "\n";
$blockquote_is_multiline = true;
}
else
{
$blockquote = $blockquote_is_multiline
? $this->parse_lines($blockquote)
: '<p>'.$this->parse_inline_elements($blockquote).'</p>'."\n";
$markup .= '<blockquote>'."\n".$quote.'</blockquote>'."\n"; $markup .= '<blockquote>'."\n".$blockquote.'</blockquote>'."\n";
unset($quote); unset($blockquote);
} }
} }
# Atx Heading # Atx Heading
if (isset($atx_heading)) if (isset($line) and $line !== '' and $line[0] === '#' and preg_match('/^(#{1,6})[ ]*(.+?)[ ]*#*$/', $line, $matches))
{
$markup .= '<h'.$atx_heading_level.'>'.$atx_heading.'</h'.$atx_heading_level.'>'."\n";
unset($atx_heading);
}
if (isset($line) and $line[0] === '#' and preg_match('/^(#{1,6})[ ]*(.+?)[ ]*#*$/', $line, $matches))
{ {
$atx_heading_level = strlen($matches[1]); $atx_heading_level = strlen($matches[1]);
@ -423,28 +312,24 @@ class Parsedown
unset($line); unset($line);
} }
elseif (isset($atx_heading))
# Setext Heading
if (isset($line) and isset($paragraph))
{ {
$setext_characters = array('=', '-'); $markup .= '<h'.$atx_heading_level.'>'.$atx_heading.'</h'.$atx_heading_level.'>'."\n";
foreach ($setext_characters as $index => $setext_character) unset($atx_heading);
{ }
if ($line[0] === $setext_character and preg_match('/^['.$setext_character.']+[ ]*$/', $line))
{ # Setext Heading (=)
$setext_heading_level = $index + 1;
if (isset($line) and $line !== '' and isset($paragraph) and preg_match('/^[=]+[ ]*$/', $line))
$setext_heading_text = $this->parse_inline_elements($paragraph); {
$setext_heading_text = $this->parse_inline_elements($paragraph);
$markup .= '<h'.$setext_heading_level.'>'.$setext_heading_text.'</h'.$setext_heading_level.'>'."\n";
$markup .= '<h1>'.$setext_heading_text.'</h1>'."\n";
unset($paragraph, $line);
unset($paragraph, $line);
continue 2;
} continue;
}
} }
# Paragraph # Paragraph
@ -456,12 +341,10 @@ class Parsedown
unset($quick_line); unset($quick_line);
} }
if (isset($line)) if (isset($line) and $line !== '')
{ {
substr($line, -2) === ' ' substr($line, -2) === ' ' and $line = substr_replace($line, '<br />', -2);
and $line = substr($line, 0, -2)
and $line .= '<br />';
if (isset($paragraph)) if (isset($paragraph))
{ {
$paragraph .= "\n".$line; $paragraph .= "\n".$line;
@ -471,18 +354,31 @@ class Parsedown
$paragraph = $line; $paragraph = $line;
} }
} }
else elseif (isset($paragraph))
{ {
if (isset($paragraph)) $paragraph_text = $this->parse_inline_elements($paragraph);
if ($context === 'li')
{ {
$paragraph_text = $this->parse_inline_elements($paragraph); if ( ! $markup and $index + 1 === $line_count)
{
$text_is_simple = true;
}
else
{
$markup or $markup .= "\n";
}
$markup .= $markup === '' && $paragraph_based === FALSE $markup .= isset($text_is_simple)
? $paragraph_text ? $paragraph_text
: '<p>'.$paragraph_text.'</p>'."\n"; : '<p>'.$paragraph_text.'</p>'."\n";
unset($paragraph);
} }
else
{
$markup .= '<p>'.$paragraph_text.'</p>'."\n";
}
unset($paragraph);
} }
} }