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[2.0.1] Officially add experimental auto-paragraphing and linkification functionality. Rename %Core.DefinitionCache to %Cache.DefinitionImpl. Have AutoParagraph handle even more edge cases. Fix MakeWellFormed bug.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1223 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
2007-06-24 20:29:50 +00:00
parent 5f0663cad7
commit b15cbbb42a
8 changed files with 297 additions and 69 deletions
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183
library/HTMLPurifier/Injector/AutoParagraph.php
View File

@@ -2,6 +2,24 @@
require_once 'HTMLPurifier/Injector.php';
HTMLPurifier_ConfigSchema::define(
'AutoFormat', 'AutoParagraph', false, 'bool', '
<p>
This directive turns on auto-paragraphing, where double newlines are
converted in to paragraphs whenever possible. Auto-paragraphing
applies when:
</p>
<ul>
<li>There are inline elements or text in the root node</li>
<li>There are inline elements or text with double newlines or
block elements in nodes that allow paragraph tags</li>
<li>There are double newlines in paragraph tags</li>
</ul>
<p>
This directive has been available since 2.0.1.
</p>
');
/**
* Injector that auto paragraphs text in the root node based on
* double-spacing.
@@ -11,27 +29,94 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
function handleText(&$token) {
$text = $token->data;
// $token is the focus: if processing is needed, it gets
// turned into an array of tokens that will replace the
// original token
if (empty($this->currentNesting)) {
if (!$this->allowsElement('p')) return;
// we're in root node, and the root node allows paragraphs
// start a paragraph since we just hit some text
// case 1: we're in root node (and it allows paragraphs)
$token = array(new HTMLPurifier_Token_Start('p'));
$this->_splitText($text, $token);
} elseif ($this->currentNesting[count($this->currentNesting)-1]->name == 'p') {
// we're not in root node but we're in a paragraph, so don't
// add a paragraph start tag but still perform processing
// case 2: we're in a paragraph
$token = array();
$this->_splitText($text, $token);
} elseif ($this->allowsElement('p')) {
// case 3: we're in an element that allows paragraphs
if (strpos($text, PHP_EOL . PHP_EOL) !== false) {
// case 3.1: this text node has a double-newline
$token = array(new HTMLPurifier_Token_Start('p'));
$this->_splitText($text, $token);
} else {
$ok = false;
// test if up-coming tokens are either block or have
// a double newline in them
for ($i = $this->inputIndex + 1; isset($this->inputTokens[$i]); $i++) {
if ($this->inputTokens[$i]->type == 'start'){
if (!$this->_isInline($this->inputTokens[$i])) {
$ok = true;
}
break;
}
if ($this->inputTokens[$i]->type == 'end') break;
if ($this->inputTokens[$i]->type == 'text') {
if (strpos($this->inputTokens[$i]->data, PHP_EOL . PHP_EOL) !== false) {
$ok = true;
}
if (!$this->inputTokens[$i]->is_whitespace) break;
}
}
if ($ok) {
// case 3.2: this text node is next to another node
// that will start a paragraph
$token = array(new HTMLPurifier_Token_Start('p'), $token);
}
}
}
}
function handleStart(&$token) {
// check if we're inside a tag already, if so, don't add
// paragraph tags
if (!empty($this->currentNesting)) return;
// check if we're inside a tag already
if (!empty($this->currentNesting)) {
if ($this->allowsElement('p')) {
// special case: we're in an element that allows paragraphs
// this token is already paragraph, abort
if ($token->name == 'p') return;
// check if this token is adjacent to the parent
if ($this->inputTokens[$this->inputIndex - 1]->type != 'start') {
// not adjacent, we can abort early
// add lead paragraph tag if our token is inline
if ($this->_isInline($token)) {
$token = array(new HTMLPurifier_Token_Start('p'), $token);
}
return;
}
// this token is the first child of the element that allows
// paragraph. We have to peek ahead and see whether or not
// there is anything inside that suggests that a paragraph
// will be needed
$ok = false;
// maintain a mini-nesting counter, this lets us bail out
// early if possible
$j = 2; // current nesting, is two due to parent and this start
for ($i = $this->inputIndex + 1; isset($this->inputTokens[$i]); $i++) {
if ($this->inputTokens[$i]->type == 'start') $j++;
if ($this->inputTokens[$i]->type == 'end') $j--;
if ($this->inputTokens[$i]->type == 'text') {
if (strpos($this->inputTokens[$i]->data, PHP_EOL . PHP_EOL) !== false) {
$ok = true;
break;
}
}
if ($j <= 0) break;
}
if ($ok) {
$token = array(new HTMLPurifier_Token_Start('p'), $token);
}
}
return;
}
// check if the start tag counts as a "block" element
if (!$this->_isInline($token)) return;
@@ -56,55 +141,79 @@ class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
// remove empty paragraphs
$paragraphs = array();
$needs_start = false;
$first = true;
foreach ($raw_paragraphs as $par) {
if (trim($par) !== '') $paragraphs[] = $par;
if (trim($par) !== '') {
$paragraphs[] = $par;
} elseif (empty($result) && $first) {
// The empty result indicates that the AutoParagraph
// injector did not add any start paragraph tokens.
// The fact that the first paragraph is empty indicates
// that there was a double-newline at the start of the
// data.
// Combined together, this means that we are in a paragraph,
// and the newline means we should start a new one.
$result[] = new HTMLPurifier_Token_End('p');
// However, the start token should only be added if
// there is more processing to be done (i.e. there are
// real paragraphs in here). If there are none, the
// next start paragraph tag will be handled by the
// next run-around the injector
$needs_start = true;
}
$first = false;
}
// check if there are no "real" paragraphs to be processed
if (empty($paragraphs) && count($raw_paragraphs) > 1) {
$result[] = new HTMLPurifier_Token_End('p');
if (empty($paragraphs)) {
return;
}
// add a start tag if an end tag was added while processing
// the raw paragraphs (that happens if there's a leading double
// newline)
if ($needs_start) $result[] = new HTMLPurifier_Token_Start('p');
// append the paragraphs onto the result
foreach ($paragraphs as $par) {
$result[] = new HTMLPurifier_Token_Text($par);
$result[] = new HTMLPurifier_Token_End('p');
$result[] = new HTMLPurifier_Token_Start('p');
}
array_pop($result); // remove trailing start token
// remove trailing start token, if one is needed, it will
// be handled the next time this injector is called
array_pop($result);
// check the outside to determine whether or not the
// end paragraph tag should be removed. It should be removed
// unless the next non-whitespace token is a paragraph
// or a block element.
$remove_paragraph_end = true;
// Start of the checks one after the current token's index
for ($i = $this->inputIndex + 1; isset($this->inputTokens[$i]); $i++) {
if ($this->inputTokens[$i]->type == 'start' || $this->inputTokens[$i]->type == 'empty') {
$remove_paragraph_end = $this->_isInline($this->inputTokens[$i]);
break;
}
// check if we can abort early (whitespace means we carry-on!)
if ($this->inputTokens[$i]->type == 'text' && !$this->inputTokens[$i]->is_whitespace) break;
// end tags will automatically be handled by MakeWellFormed,
// so we don't have to worry about them
if ($this->inputTokens[$i]->type == 'end') break;
}
// check the outside to determine whether or not the
// end paragraph tag should be removed
if ($this->_removeParagraphEnd()) {
if ($remove_paragraph_end) {
array_pop($result);
}
}
/**
* Returns boolean whether or not to remove the paragraph end tag
* that was automatically added. The paragraph end tag should be
* removed unless the next token is a paragraph or block element.
* @private
*/
function _removeParagraphEnd() {
$tokens =& $this->inputTokens;
$remove_paragraph_end = true;
// Start of the checks one after the current token's index
for ($i = $this->inputIndex + 1; isset($tokens[$i]); $i++) {
if ($tokens[$i]->type == 'start' || $tokens[$i]->type == 'empty') {
$remove_paragraph_end = $this->_isInline($tokens[$i]);
break;
}
// check if we can abort early (whitespace means we carry-on!)
if ($tokens[$i]->type == 'text' && !$tokens[$i]->is_whitespace) break;
if ($tokens[$i]->type == 'end') break; // nonsensical
}
return $remove_paragraph_end;
}
/**
* Returns true if passed token is inline (and, ergo, allowed in
* paragraph tags)

8
library/HTMLPurifier/Injector/Linkify.php
View File

@@ -2,6 +2,14 @@
require_once 'HTMLPurifier/Injector.php';
HTMLPurifier_ConfigSchema::define(
'AutoFormat', 'Linkify', false, 'bool', '
<p>
This directive turns on linkification, auto-linking http, ftp and
https URLs. This directive has been available since 2.0.1.
</p>
');
/**
* Injector that converts http, https and ftp text URLs to actual links.
*/