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Make context errors more friendly; factor out disabled; fix broken test cases; update TODO.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1220 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
2007-06-24 04:22:28 +00:00
parent 269268b843
commit 75e52a12a6
5 changed files with 51 additions and 37 deletions
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59
library/HTMLPurifier/Strategy/MakeWellFormed.php
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@@ -50,48 +50,58 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
$escape_invalid_tags = $config->get('Core', 'EscapeInvalidTags');
// -- begin INJECTOR --
// factor this stuff out to its own class
$injector = array();
$injector_skip = array();
$injector_disabled = array();
if ($config->get('Core', 'AutoParagraph')) {
$injector[] = new HTMLPurifier_Injector_AutoParagraph();
$injector_skip[] = 0;
$injector_disabled[] = false;
// decrement happens first, so set to one so we start at zero
$injector_skip[] = 1;
}
if ($config->get('Core', 'AutoLinkify')) {
$injector[] = new HTMLPurifier_Injector_Linkify();
$injector_skip[] = 0;
$injector_disabled[] = false;
$injector_skip[] = 1;
}
$current_injector = 0;
// array index of the injector that resulted in an array
// substitution. This enables processTokens() to know which
// injectors are affected by the added tokens and which are
// not (namely, the ones after the current injector are not
// affected)
$current_injector = false;
$context->register('Injector', $injector);
$context->register('InjectorSkip', $injector_skip);
$context->register('CurrentInjector', $current_injector);
// number of tokens to skip + 1
// before processing, this gets decremented: if it equals zero,
// it means the injector is active and is processing tokens, if
// it is greater than zero, then it is inactive, presumably having
// been the source of the tokens
$context->register('InjectorSkip', $injector_skip);
// -- end INJECTOR --
for ($tokens_index = 0; isset($tokens[$tokens_index]); $tokens_index++) {
// if all goes well, this token will be passed through unharmed
$token = $tokens[$tokens_index];
foreach ($injector as $i => $x) {
if ($injector_skip[$i] > 0) {
$injector_skip[$i]--;
$injector_disabled[$i] = true;
} else {
$injector_disabled[$i] = false;
}
if ($injector_skip[$i] > 0) $injector_skip[$i]--;
}
// quick-check: if it's not a tag, no need to process
if (empty( $token->is_tag )) {
// duplicated with handleStart
if ($token->type === 'text') {
foreach ($injector as $i => $x) {
if (!$injector_disabled[$i]) {
if (!$injector_skip[$i]) {
$x->handleText($token, $config, $context);
}
if (is_array($token)) {
@@ -149,8 +159,9 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
$current_nesting[] = $parent; // undo the pop
}
// injectors
foreach ($injector as $i => $x) {
if (!$injector_disabled[$i]) {
if (!$injector_skip[$i]) {
$x->handleStart($token, $config, $context);
}
if (is_array($token)) {
@@ -236,12 +247,16 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
$context->destroy('InputIndex');
$context->destroy('OutputTokens');
$context->destroy('Injector');
$context->destroy('CurrentInjector');
$context->destroy('InjectorSkip');
return $result;
}
function processToken($token, $config, &$context) {
if (is_array($token)) {
// the original token was overloaded by a formatter, time
// the original token was overloaded by an injector, time
// to some fancy acrobatics
$tokens =& $context->get('InputTokens');
@@ -250,13 +265,11 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
// re-processed
array_splice($tokens, $tokens_index--, 1, $token);
// this will be a bit more complicated when we add more formatters
// we need to prevent the same formatter from running twice on it
$injector_skip =& $context->get('InjectorSkip');
$injector =& $context->get('Injector');
// adjust the injector skips based on the array substitution
$injector_skip =& $context->get('InjectorSkip');
$current_injector =& $context->get('CurrentInjector');
$offset = count($token);
$offset = count($token) + 1;
for ($i = 0; $i <= $current_injector; $i++) {
$injector_skip[$i] += $offset;
}
@@ -269,9 +282,9 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
if ($token->type == 'start') {
$current_nesting[] = $token;
} elseif ($token->type == 'end') {
// theoretical: this isn't used because performing
// theoretical: this code doesn't get run because performing
// the calculations inline is more efficient, and
// end tokens currently do not cause a handler invocation
// end tokens (currently) do not cause a handler invocation
array_pop($current_nesting);
}
}