A super easy PHP Framework for web development!
https://github.com/exacti/phacil-framework
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
318 lines
11 KiB
318 lines
11 KiB
6 years ago
|
<?php
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file is part of Mustache.php.
|
||
|
|
*
|
||
|
|
* (c) 2010-2017 Justin Hileman
|
||
|
|
*
|
||
|
|
* For the full copyright and license information, please view the LICENSE
|
||
|
|
* file that was distributed with this source code.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Mustache Parser class.
|
||
|
|
*
|
||
|
|
* This class is responsible for turning a set of Mustache tokens into a parse tree.
|
||
|
|
*/
|
||
|
|
class Mustache_Parser
|
||
|
|
{
|
||
|
|
private $lineNum;
|
||
|
|
private $lineTokens;
|
||
|
|
private $pragmas;
|
||
|
|
private $defaultPragmas = array();
|
||
|
|
|
||
|
|
private $pragmaFilters;
|
||
|
|
private $pragmaBlocks;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Process an array of Mustache tokens and convert them into a parse tree.
|
||
|
|
*
|
||
|
|
* @param array $tokens Set of Mustache tokens
|
||
|
|
*
|
||
|
|
* @return array Mustache token parse tree
|
||
|
|
*/
|
||
|
|
public function parse(array $tokens = array())
|
||
|
|
{
|
||
|
|
$this->lineNum = -1;
|
||
|
|
$this->lineTokens = 0;
|
||
|
|
$this->pragmas = $this->defaultPragmas;
|
||
|
|
|
||
|
|
$this->pragmaFilters = isset($this->pragmas[Mustache_Engine::PRAGMA_FILTERS]);
|
||
|
|
$this->pragmaBlocks = isset($this->pragmas[Mustache_Engine::PRAGMA_BLOCKS]);
|
||
|
|
|
||
|
|
return $this->buildTree($tokens);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Enable pragmas across all templates, regardless of the presence of pragma
|
||
|
|
* tags in the individual templates.
|
||
|
|
*
|
||
|
|
* @internal Users should set global pragmas in Mustache_Engine, not here :)
|
||
|
|
*
|
||
|
|
* @param string[] $pragmas
|
||
|
|
*/
|
||
|
|
public function setPragmas(array $pragmas)
|
||
|
|
{
|
||
|
|
$this->pragmas = array();
|
||
|
|
foreach ($pragmas as $pragma) {
|
||
|
|
$this->enablePragma($pragma);
|
||
|
|
}
|
||
|
|
$this->defaultPragmas = $this->pragmas;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Helper method for recursively building a parse tree.
|
||
|
|
*
|
||
|
|
* @throws Mustache_Exception_SyntaxException when nesting errors or mismatched section tags are encountered
|
||
|
|
*
|
||
|
|
* @param array &$tokens Set of Mustache tokens
|
||
|
|
* @param array $parent Parent token (default: null)
|
||
|
|
*
|
||
|
|
* @return array Mustache Token parse tree
|
||
|
|
*/
|
||
|
|
private function buildTree(array &$tokens, array $parent = null)
|
||
|
|
{
|
||
|
|
$nodes = array();
|
||
|
|
|
||
|
|
while (!empty($tokens)) {
|
||
|
|
$token = array_shift($tokens);
|
||
|
|
|
||
|
|
if ($token[Mustache_Tokenizer::LINE] === $this->lineNum) {
|
||
|
|
$this->lineTokens++;
|
||
|
|
} else {
|
||
|
|
$this->lineNum = $token[Mustache_Tokenizer::LINE];
|
||
|
|
$this->lineTokens = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->pragmaFilters && isset($token[Mustache_Tokenizer::NAME])) {
|
||
|
|
list($name, $filters) = $this->getNameAndFilters($token[Mustache_Tokenizer::NAME]);
|
||
|
|
if (!empty($filters)) {
|
||
|
|
$token[Mustache_Tokenizer::NAME] = $name;
|
||
|
|
$token[Mustache_Tokenizer::FILTERS] = $filters;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch ($token[Mustache_Tokenizer::TYPE]) {
|
||
|
|
case Mustache_Tokenizer::T_DELIM_CHANGE:
|
||
|
|
$this->checkIfTokenIsAllowedInParent($parent, $token);
|
||
|
|
$this->clearStandaloneLines($nodes, $tokens);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_SECTION:
|
||
|
|
case Mustache_Tokenizer::T_INVERTED:
|
||
|
|
$this->checkIfTokenIsAllowedInParent($parent, $token);
|
||
|
|
$this->clearStandaloneLines($nodes, $tokens);
|
||
|
|
$nodes[] = $this->buildTree($tokens, $token);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_END_SECTION:
|
||
|
|
if (!isset($parent)) {
|
||
|
|
$msg = sprintf(
|
||
|
|
'Unexpected closing tag: /%s on line %d',
|
||
|
|
$token[Mustache_Tokenizer::NAME],
|
||
|
|
$token[Mustache_Tokenizer::LINE]
|
||
|
|
);
|
||
|
|
throw new Mustache_Exception_SyntaxException($msg, $token);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($token[Mustache_Tokenizer::NAME] !== $parent[Mustache_Tokenizer::NAME]) {
|
||
|
|
$msg = sprintf(
|
||
|
|
'Nesting error: %s (on line %d) vs. %s (on line %d)',
|
||
|
|
$parent[Mustache_Tokenizer::NAME],
|
||
|
|
$parent[Mustache_Tokenizer::LINE],
|
||
|
|
$token[Mustache_Tokenizer::NAME],
|
||
|
|
$token[Mustache_Tokenizer::LINE]
|
||
|
|
);
|
||
|
|
throw new Mustache_Exception_SyntaxException($msg, $token);
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->clearStandaloneLines($nodes, $tokens);
|
||
|
|
$parent[Mustache_Tokenizer::END] = $token[Mustache_Tokenizer::INDEX];
|
||
|
|
$parent[Mustache_Tokenizer::NODES] = $nodes;
|
||
|
|
|
||
|
|
return $parent;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_PARTIAL:
|
||
|
|
$this->checkIfTokenIsAllowedInParent($parent, $token);
|
||
|
|
//store the whitespace prefix for laters!
|
||
|
|
if ($indent = $this->clearStandaloneLines($nodes, $tokens)) {
|
||
|
|
$token[Mustache_Tokenizer::INDENT] = $indent[Mustache_Tokenizer::VALUE];
|
||
|
|
}
|
||
|
|
$nodes[] = $token;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_PARENT:
|
||
|
|
$this->checkIfTokenIsAllowedInParent($parent, $token);
|
||
|
|
$nodes[] = $this->buildTree($tokens, $token);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_BLOCK_VAR:
|
||
|
|
if ($this->pragmaBlocks) {
|
||
|
|
// BLOCKS pragma is enabled, let's do this!
|
||
|
|
if ($parent[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_PARENT) {
|
||
|
|
$token[Mustache_Tokenizer::TYPE] = Mustache_Tokenizer::T_BLOCK_ARG;
|
||
|
|
}
|
||
|
|
$this->clearStandaloneLines($nodes, $tokens);
|
||
|
|
$nodes[] = $this->buildTree($tokens, $token);
|
||
|
|
} else {
|
||
|
|
// pretend this was just a normal "escaped" token...
|
||
|
|
$token[Mustache_Tokenizer::TYPE] = Mustache_Tokenizer::T_ESCAPED;
|
||
|
|
// TODO: figure out how to figure out if there was a space after this dollar:
|
||
|
|
$token[Mustache_Tokenizer::NAME] = '$' . $token[Mustache_Tokenizer::NAME];
|
||
|
|
$nodes[] = $token;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_PRAGMA:
|
||
|
|
$this->enablePragma($token[Mustache_Tokenizer::NAME]);
|
||
|
|
// no break
|
||
|
|
|
||
|
|
case Mustache_Tokenizer::T_COMMENT:
|
||
|
|
$this->clearStandaloneLines($nodes, $tokens);
|
||
|
|
$nodes[] = $token;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
$nodes[] = $token;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($parent)) {
|
||
|
|
$msg = sprintf(
|
||
|
|
'Missing closing tag: %s opened on line %d',
|
||
|
|
$parent[Mustache_Tokenizer::NAME],
|
||
|
|
$parent[Mustache_Tokenizer::LINE]
|
||
|
|
);
|
||
|
|
throw new Mustache_Exception_SyntaxException($msg, $parent);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $nodes;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Clear standalone line tokens.
|
||
|
|
*
|
||
|
|
* Returns a whitespace token for indenting partials, if applicable.
|
||
|
|
*
|
||
|
|
* @param array $nodes Parsed nodes
|
||
|
|
* @param array $tokens Tokens to be parsed
|
||
|
|
*
|
||
|
|
* @return array|null Resulting indent token, if any
|
||
|
|
*/
|
||
|
|
private function clearStandaloneLines(array &$nodes, array &$tokens)
|
||
|
|
{
|
||
|
|
if ($this->lineTokens > 1) {
|
||
|
|
// this is the third or later node on this line, so it can't be standalone
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$prev = null;
|
||
|
|
if ($this->lineTokens === 1) {
|
||
|
|
// this is the second node on this line, so it can't be standalone
|
||
|
|
// unless the previous node is whitespace.
|
||
|
|
if ($prev = end($nodes)) {
|
||
|
|
if (!$this->tokenIsWhitespace($prev)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($next = reset($tokens)) {
|
||
|
|
// If we're on a new line, bail.
|
||
|
|
if ($next[Mustache_Tokenizer::LINE] !== $this->lineNum) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the next token isn't whitespace, bail.
|
||
|
|
if (!$this->tokenIsWhitespace($next)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($tokens) !== 1) {
|
||
|
|
// Unless it's the last token in the template, the next token
|
||
|
|
// must end in newline for this to be standalone.
|
||
|
|
if (substr($next[Mustache_Tokenizer::VALUE], -1) !== "\n") {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Discard the whitespace suffix
|
||
|
|
array_shift($tokens);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($prev) {
|
||
|
|
// Return the whitespace prefix, if any
|
||
|
|
return array_pop($nodes);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check whether token is a whitespace token.
|
||
|
|
*
|
||
|
|
* True if token type is T_TEXT and value is all whitespace characters.
|
||
|
|
*
|
||
|
|
* @param array $token
|
||
|
|
*
|
||
|
|
* @return bool True if token is a whitespace token
|
||
|
|
*/
|
||
|
|
private function tokenIsWhitespace(array $token)
|
||
|
|
{
|
||
|
|
if ($token[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_TEXT) {
|
||
|
|
return preg_match('/^\s*$/', $token[Mustache_Tokenizer::VALUE]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check whether a token is allowed inside a parent tag.
|
||
|
|
*
|
||
|
|
* @throws Mustache_Exception_SyntaxException if an invalid token is found inside a parent tag
|
||
|
|
*
|
||
|
|
* @param array|null $parent
|
||
|
|
* @param array $token
|
||
|
|
*/
|
||
|
|
private function checkIfTokenIsAllowedInParent($parent, array $token)
|
||
|
|
{
|
||
|
|
if ($parent[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_PARENT) {
|
||
|
|
throw new Mustache_Exception_SyntaxException('Illegal content in < parent tag', $token);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Split a tag name into name and filters.
|
||
|
|
*
|
||
|
|
* @param string $name
|
||
|
|
*
|
||
|
|
* @return array [Tag name, Array of filters]
|
||
|
|
*/
|
||
|
|
private function getNameAndFilters($name)
|
||
|
|
{
|
||
|
|
$filters = array_map('trim', explode('|', $name));
|
||
|
|
$name = array_shift($filters);
|
||
|
|
|
||
|
|
return array($name, $filters);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Enable a pragma.
|
||
|
|
*
|
||
|
|
* @param string $name
|
||
|
|
*/
|
||
|
|
private function enablePragma($name)
|
||
|
|
{
|
||
|
|
$this->pragmas[$name] = true;
|
||
|
|
|
||
|
|
switch ($name) {
|
||
|
|
case Mustache_Engine::PRAGMA_BLOCKS:
|
||
|
|
$this->pragmaBlocks = true;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case Mustache_Engine::PRAGMA_FILTERS:
|
||
|
|
$this->pragmaFilters = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|