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92 lines
3.7 KiB
92 lines
3.7 KiB
<?php
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declare(strict_types=1);
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namespace dW\HTML5;
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class ParseError {
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const TAG_NAME_EXPECTED = 0;
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const UNEXPECTED_EOF = 1;
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const UNEXPECTED_CHARACTER = 2;
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const ATTRIBUTE_EXISTS = 3;
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const UNEXPECTED_TAG_END = 4;
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const UNEXPECTED_START_TAG = 5;
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const UNEXPECTED_END_TAG = 6;
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const UNEXPECTED_DOCTYPE = 7;
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const INVALID_DOCTYPE = 8;
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const INVALID_CONTROL_OR_NONCHARACTERS = 9;
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const UNEXPECTED_XMLNS_ATTRIBUTE_VALUE = 10;
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const ENTITY_UNEXPECTED_CHARACTER = 11;
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const INVALID_NUMERIC_ENTITY = 12;
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const INVALID_NAMED_ENTITY = 14;
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const INVALID_CODEPOINT = 15;
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protected static $messages = ['Tag name expected; found %s',
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'Unexpected end-of-file; %s expected',
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'Unexpected "%s" character; %s expected',
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'%s attribute already exists; discarding',
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'Unexpected tag end; %s expected',
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'Unexpected %s start tag; %s expected',
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'Unexpected %s end tag; %s expected',
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'Unexpected DOCTYPE; %s expected',
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'Invalid DOCTYPE',
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'Invalid Control or Non-character; removing',
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'Unexpected xmlns attribute value; %s expected',
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'Unexpected "%s" character in entity; %s expected',
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'"%s" is an invalid numeric entity',
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'"%s" is an invalid name for an entity',
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'"%s" is an invalid character codepoint'];
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public static function errorHandler($code, $message, $file, $line, array $context) {
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if ($code === E_USER_WARNING) {
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$errMsg = sprintf("HTML5 Parse Error: \"%s\" in %s", $message, Parser::$instance->data->filePath);
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if (Parser::$instance->data->length !== 0) {
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$errMsg .= sprintf(" on line %s, column %s\n", Parser::$instance->data->line, Parser::$instance->data->column);
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} else {
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$errMsg .= "\n";
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}
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echo $errMsg;
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}
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}
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public static function trigger(int $code, ...$args): bool {
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if (!isset(static::$messages[$code])) {
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throw new Exception(Exception::INVALID_CODE);
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}
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// Set the error handler and honor already-set error reporting rules.
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set_error_handler('\\dW\\HTML5\\ParseError::errorHandler', error_reporting());
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$message = static::$messages[$code];
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// Count the number of replacements needed in the message.
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$count = substr_count($message, '%s');
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// If the number of replacements don't match the arguments then oops.
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if (count($args) !== $count) {
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throw new Exception(Exception::INCORRECT_PARAMETERS_FOR_MESSAGE, $count);
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}
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if ($count > 0) {
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// Convert newlines and tabs in the arguments to words to better express what they
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// are.
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$args = array_map(function($value) {
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if ($value === "\n") {
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return 'Newline';
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} elseif ($value === "\t") {
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return 'Tab';
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} elseif (is_null($value)) {
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return "nothing";
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} else {
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return $value;
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}
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}, $args);
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// Go through each of the arguments and run sprintf on the strings.
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$message = call_user_func_array('sprintf', array_merge([$message], $args));
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}
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$output = trigger_error($message, E_USER_WARNING);
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restore_error_handler();
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return $output;
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}
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}
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