diff options
Diffstat (limited to 'src/ste/Parser.php')
| -rw-r--r-- | src/ste/Parser.php | 178 |
1 files changed, 99 insertions, 79 deletions
diff --git a/src/ste/Parser.php b/src/ste/Parser.php index 7226c60..40f5f20 100644 --- a/src/ste/Parser.php +++ b/src/ste/Parser.php @@ -10,7 +10,8 @@ namespace kch42\ste; * The class, where the parser lives in. Can not be constructed manually. * Use the static method parse. */ -class Parser { +class Parser +{ private $text; private $name; private $off; @@ -21,15 +22,17 @@ class Parser { const ESCAPES_DEFAULT = '$?~{}|\\'; - private function __construct($text, $name) { + private function __construct($text, $name) + { $this->text = $text; $this->name = $name; $this->off = 0; $this->len = mb_strlen($text); } - private function next($n = 1) { - if($n <= 0) { + private function next($n = 1) + { + if ($n <= 0) { throw new \InvalidArgumentException("\$n must be > 0"); } $c = mb_substr($this->text, $this->off, $n); @@ -37,48 +40,53 @@ class Parser { return $c; } - private function eof() { + private function eof() + { return ($this->off == $this->len); } - private function back($n = 1) { - if($n <= 0) { + private function back($n = 1) + { + if ($n <= 0) { throw new \InvalidArgumentException("\$n must be > 0"); } $this->off = max($this->off - $n, 0); } - private function search_off($needle) { + private function search_off($needle) + { return mb_strpos($this->text, $needle, $this->off); } - private function search_multi($needles) { + private function search_multi($needles) + { $oldoff = $this->off; $minoff = $this->len; - $which = NULL; + $which = null; - foreach($needles as $key => $needle) { - if(($off = $this->search_off($needle)) === false) { + foreach ($needles as $key => $needle) { + if (($off = $this->search_off($needle)) === false) { continue; } - if($off < $minoff) { + if ($off < $minoff) { $minoff = $off; $which = $key; } } - $this->off = $minoff + (($which === NULL) ? 0 : mb_strlen((string) $needles[$which])); + $this->off = $minoff + (($which === null) ? 0 : mb_strlen((string) $needles[$which])); return array($which, $minoff, mb_substr($this->text, $oldoff, $minoff - $oldoff), $oldoff); } - private function search($needle) { + private function search($needle) + { $oldoff = $this->off; $off = $this->search_off($needle); - if($off === false) { + if ($off === false) { $this->off = $this->len; return array(false, mb_substr($this->text, $oldoff), $oldoff); } @@ -87,10 +95,11 @@ class Parser { return array($off, mb_substr($this->text, $oldoff, $off - $oldoff), $oldoff); } - private function take_while($cb) { + private function take_while($cb) + { $s = ""; - while(($c = $this->next()) !== "") { - if(!call_user_func($cb, $c)) { + while (($c = $this->next()) !== "") { + if (!call_user_func($cb, $c)) { $this->back(); return $s; } @@ -99,14 +108,18 @@ class Parser { return $s; } - private function skip_ws() { + private function skip_ws() + { $this->take_while("ctype_space"); } - private function get_name() { + private function get_name() + { $off = $this->off; - $name = $this->take_while(function($c) { return ctype_alnum($c) || ($c == "_"); }); - if(mb_strlen($name) == 0) { + $name = $this->take_while(function ($c) { + return ctype_alnum($c) || ($c == "_"); + }); + if (mb_strlen($name) == 0) { throw new ParseCompileError("Expected a name (alphanumeric chars + '_', at least one char)", $this->name, $off); } return $name; @@ -128,7 +141,8 @@ class Parser { * Throws: * <ParseCompileError> */ - public static function parse($text, $name) { + public static function parse($text, $name) + { $obj = new self($text, $name); $res = $obj->parse_text( self::ESCAPES_DEFAULT, /* Escapes */ @@ -137,39 +151,40 @@ class Parser { return self::tidyup_ast($res[0]); } - private static function tidyup_ast($ast) { + private static function tidyup_ast($ast) + { $out = array(); - $prevtext = NULL; + $prevtext = null; $first = true; - foreach($ast as $node) { - if($node instanceof TextNode) { - if($prevtext === NULL) { + foreach ($ast as $node) { + if ($node instanceof TextNode) { + if ($prevtext === null) { $prevtext = $node; } else { $prevtext->text .= $node->text; } } else { - if($prevtext !== NULL) { - if($first) { + if ($prevtext !== null) { + if ($first) { $prevtext->text = ltrim($prevtext->text); } - if($prevtext->text != "") { + if ($prevtext->text != "") { $out[] = $prevtext; } } - $prevtext = NULL; + $prevtext = null; $first = false; - if($node instanceof TagNode) { + if ($node instanceof TagNode) { $node->sub = self::tidyup_ast($node->sub); - foreach($node->params as $k => &$v) { + foreach ($node->params as $k => &$v) { $v = self::tidyup_ast($v); } unset($v); } else { /* VariableNode */ - foreach($node->arrayfields as &$v) { + foreach ($node->arrayfields as &$v) { $v = self::tidyup_ast($v); } unset($v); @@ -179,11 +194,11 @@ class Parser { } } - if($prevtext !== NULL) { - if($first) { + if ($prevtext !== null) { + if ($first) { $prevtext->text = ltrim($prevtext->text); } - if($prevtext->text != "") { + if ($prevtext->text != "") { $out[] = $prevtext; } } @@ -191,7 +206,8 @@ class Parser { return $out; } - private function parse_text($escapes, $flags, $breakon = NULL, $separator = NULL, $nullaction = NULL, $opentag = NULL, $openedat = -1) { + private function parse_text($escapes, $flags, $breakon = null, $separator = null, $nullaction = null, $opentag = null, $openedat = -1) + { $elems = array(); $astlist = array(); @@ -203,30 +219,30 @@ class Parser { "var" => '$', ); - if($flags & self::PARSE_TAG) { + if ($flags & self::PARSE_TAG) { $needles["tagopen"] = '<ste:'; $needles["closetagopen"] = '</ste:'; } - if($flags & self::PARSE_SHORT) { + if ($flags & self::PARSE_SHORT) { $needles["shortifopen"] = '?{'; $needles["shortcompopen"] = '~{'; } - if($separator !== NULL) { + if ($separator !== null) { $needles["sep"] = $separator; } - if($breakon !== NULL) { + if ($breakon !== null) { $needles["break"] = $breakon; } - for(;;) { + for (;;) { list($which, $off, $before, $offbefore) = $this->search_multi($needles); $astlist[] = new TextNode($this->name, $offbefore, $before); - switch($which) { - case NULL: - if($nullaction === NULL) { + switch ($which) { + case null: + if ($nullaction === null) { $elems[] = $astlist; return $elems; } else { @@ -235,14 +251,14 @@ class Parser { break; case "commentopen": list($off, $before, $offbefore) = $this->search("</ste:comment>"); - if($off === false) { + if ($off === false) { throw new ParseCompileError("ste:comment was not closed", $this->name, $offbefore); } break; case "rawopen": $off_start = $off; list($off, $before, $offbefore) = $this->search("</ste:rawtext>"); - if($off === false) { + if ($off === false) { throw new ParseCompileError("ste:rawtext was not closed", $this->name, $off_start); } $astlist[] = new TextNode($this->name, $off_start, $before); @@ -255,14 +271,14 @@ class Parser { $name = $this->get_name(); $this->skip_ws(); $off = $this->off; - if($this->next() != ">") { + if ($this->next() != ">") { throw new ParseCompileError("Expected '>' in closing ste-Tag", $this->name, $off); } - if($opentag === NULL) { + if ($opentag === null) { throw new ParseCompileError("Found closing ste:$name tag, but no tag was opened", $this->name, $off_start); } - if($opentag != $name) { + if ($opentag != $name) { throw new ParseCompileError("Open ste:$opentag was not closed", $this->name, $openedat); } @@ -270,7 +286,7 @@ class Parser { return $elems; case "escape": $c = $this->next(); - if(mb_strpos($escapes, $c) !== false) { + if (mb_strpos($escapes, $c) !== false) { $astlist[] = new TextNode($this->name, $off, $c); } else { $astlist[] = new TextNode($this->name, $off, '\\'); @@ -279,7 +295,7 @@ class Parser { break; case "shortifopen": $shortelems = $this->parse_short("?{", $off); - if(count($shortelems) != 3) { + if (count($shortelems) != 3) { throw new ParseCompileError("A short if tag must have the form ?{..|..|..}", $this->name, $off); } @@ -302,7 +318,7 @@ class Parser { break; case "shortcompopen": $shortelems = $this->parse_short("~{", $off); - if(count($shortelems) != 3) { + if (count($shortelems) != 3) { throw new ParseCompileError("A short comparasion tag must have the form ~{..|..|..}", $this->name, $off); } @@ -336,7 +352,8 @@ class Parser { return $elems; } - private function parse_short($shortname, $openedat) { + private function parse_short($shortname, $openedat) + { $tplname = $this->name; return $this->parse_text( @@ -344,43 +361,45 @@ class Parser { self::PARSE_SHORT | self::PARSE_TAG, /* Flags */ '}', /* Break on */ '|', /* Separator */ - function() use ($shortname, $tplname, $openedat) { /* NULL action */ + function () use ($shortname, $tplname, $openedat) { /* NULL action */ throw new ParseCompileError("Unclosed $shortname", $tplname, $openedat); }, - NULL, /* Open tag */ + null, /* Open tag */ $openedat /* Opened at */ ); } - private function parse_var($openedat, $curly) { + private function parse_var($openedat, $curly) + { $varnode = new VariableNode($this->name, $openedat); $varnode->name = $this->get_name(); - if(!$this->eof()) { + if (!$this->eof()) { $varnode->arrayfields = $this->parse_array(); } - if(($curly) && ($this->next() != "}")) { + if (($curly) && ($this->next() != "}")) { throw new ParseCompileError("Unclosed '\${'", $this->name, $openedat); } return $varnode; } - private function parse_array() { + private function parse_array() + { $tplname = $this->name; $arrayfields = array(); - while($this->next() == "[") { + while ($this->next() == "[") { $openedat = $this->off - 1; $res = $this->parse_text( self::ESCAPES_DEFAULT, /* Escapes */ 0, /* Flags */ ']', /* Break on */ - NULL, /* Separator */ - function() use ($tplname, $openedat) { /* NULL action */ + null, /* Separator */ + function () use ($tplname, $openedat) { /* NULL action */ throw new ParseCompileError("Unclosed array access '[...]'", $tplname, $openedat); }, - NULL, /* Open tag */ + null, /* Open tag */ $openedat /* Opened at */ ); $arrayfields[] = $res[0]; @@ -390,7 +409,8 @@ class Parser { return $arrayfields; } - private function parse_tag($openedat) { + private function parse_tag($openedat) + { $tplname = $this->name; $this->skip_ws(); @@ -399,13 +419,13 @@ class Parser { $tag->params = array(); $tag->sub = array(); - for(;;) { + for (;;) { $this->skip_ws(); - switch($this->next()) { + switch ($this->next()) { case '/': /* Self-closing tag */ $this->skip_ws(); - if($this->next() != '>') { + if ($this->next() != '>') { throw new ParseCompileError("Unclosed opening <ste: tag (expected >)", $this->name, $openedat); } @@ -414,9 +434,9 @@ class Parser { $sub = $this->parse_text( self::ESCAPES_DEFAULT, /* Escapes */ self::PARSE_SHORT | self::PARSE_TAG, /* Flags */ - NULL, /* Break on */ - NULL, /* Separator */ - function() use ($name, $tplname, $openedat) { /* NULL action */ + null, /* Break on */ + null, /* Separator */ + function () use ($name, $tplname, $openedat) { /* NULL action */ throw new ParseCompileError("Open ste:$name tag was not closed", $tplname, $openedat); }, $tag->name, /* Open tag */ @@ -430,13 +450,13 @@ class Parser { $param = $this->get_name(); $this->skip_ws(); - if($this->next() != '=') { + if ($this->next() != '=') { throw new ParseCompileError("Expected '=' after tag parameter name", $this->name, $this->off - 1); } $this->skip_ws(); $quot = $this->next(); - if(($quot != '"') && ($quot != "'")) { + if (($quot != '"') && ($quot != "'")) { throw new ParseCompileError("Expected ' or \" after '=' of tag parameter", $this->name, $this->off - 1); } @@ -445,11 +465,11 @@ class Parser { self::ESCAPES_DEFAULT . $quot, /* Escapes */ 0, /* Flags */ $quot, /* Break on */ - NULL, /* Separator */ - function() use ($quot, $tplname, $off) { /* NULL action */ + null, /* Separator */ + function () use ($quot, $tplname, $off) { /* NULL action */ throw new ParseCompileError("Open tag parameter value ($quot) was not closed", $tplname, $off); }, - NULL, /* Open tag */ + null, /* Open tag */ $off /* Opened at */ ); $tag->params[$param] = $paramval[0]; 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