diff options
| -rw-r--r-- | stupid_template_engine.php | 232 |
1 files changed, 120 insertions, 112 deletions
diff --git a/stupid_template_engine.php b/stupid_template_engine.php index b88cb3f..a74ae60 100644 --- a/stupid_template_engine.php +++ b/stupid_template_engine.php @@ -114,6 +114,16 @@ function find_closing_bracket($text, $opening, $closing) return $i; } +function instance_in_array($classname, $a) +{ + foreach($a as $v) + { + if($v instanceof $classname) + return True; + } + return False; +} + function unescape_text($text) { return stripcslashes($text); @@ -509,59 +519,62 @@ $ste_builtins = array( }, "cmp" => function($ast) { + $operators = array( + array('eq', '=='), + array('neq', '!='), + array('lt', '<'), + array('lte', '<='), + array('gt', '>'), + array('gte', '>=') + ); + $code = ""; - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; if(isset($ast->params["var_b"])) - { - $code .= _transcompile($ast->params["var_b"]); - $b = '$ste->get_var_by_name(array_pop($outputstack))'; - } + $b = '$ste->get_var_by_name(' . _transcompile($ast->params["var_b"], True) . ')'; else if(isset($ast->params["text_b"])) - { - $code .= _transcompile($ast->params["text_b"]); - $b = 'array_pop($outputstack)'; - } + $b = _transcompile($ast->params["text_b"], True); else throw new ParseCompileError("Transcompile error: neiter var_b nor text_b set in <ste:cmp>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; if(isset($ast->params["var_a"])) - { - $code .= _transcompile($ast->params["var_a"]); - $a = '$ste->get_var_by_name(array_pop($outputstack))'; - } + $a = '$ste->get_var_by_name(' . _transcompile($ast->params["var_a"], True) . ')'; else if(isset($ast->params["text_a"])) - { - $code .= _transcompile($ast->params["text_a"]); - $a = 'array_pop($outputstack)'; - } + $a = _transcompile($ast->params["text_a"], True); else throw new ParseCompileError("Transcompile error: neiter var_a nor text_a set in <ste:cmp>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - if(isset($ast->params["op"])) - $code .= _transcompile($ast->params["op"]); - else + if(!isset($ast->params["op"])) throw new ParseCompileError("Transcompile error: op not given in <ste:cmp>.", $ast->tpl, $ast->offset); - - $code .= "\$outputstack_i -= 3;\nswitch(trim(array_pop(\$outputstack)))\n{\n\t"; - $code .= implode("", array_map( - function($op) use ($a,$b) + if((count($ast->params["op"]) == 1) and ($ast->params["op"][0] instanceof TextNode)) + { + /* Operator is known at compile time, this saves *a lot* of output code! */ + $op = trim($ast->params["op"][0]->text); + $op_php = NULL; + foreach($operators as $v) + { + if($v[0] == $op) { - list($op_stetpl, $op_php) = $op; - return "case '$op_stetpl':\n\t\$outputstack[\$outputstack_i] .= (($a) $op_php ($b)) ? 'yes' : '';\n\tbreak;\n\t"; - }, - array( - array('eq', '=='), - array('neq', '!='), - array('lt', '<'), - array('lte', '<='), - array('gt', '>'), - array('gte', '>=') - ) - )); - $code .= "default: throw new \Exception('Runtime Error: Unknown operator in <ste:cmp>.');\n}\n"; + $op_php = $v[1]; + break; + } + } + if($op_php === NULL) + throw new ParseCompileError("Transcompile Error: Unknown operator in <ste:cmp>", $ast->tpl, $ast->offset); + $code .= "\$outputstack[\$outputstack_i] .= (($a) $op_php ($b)) ? 'yes' : '';\n"; + } + else + { + $code .= "switch(trim(" . _transcompile($ast->params["op"], True) . "))\n{\n\t"; + $code .= implode("", array_map( + function($op) use ($a,$b) + { + list($op_stetpl, $op_php) = $op; + return "case '$op_stetpl':\n\t\$outputstack[\$outputstack_i] .= (($a) $op_php ($b)) ? 'yes' : '';\n\tbreak;\n\t"; + }, $operators + )); + $code .= "default: throw new \Exception('Runtime Error: Unknown operator in <ste:cmp>.');\n}\n"; + } return $code; }, "not" => function($ast) @@ -584,44 +597,44 @@ $ste_builtins = array( $loopname = "forloop_" . str_replace(".", "_", uniqid("",True)); if(empty($ast->params["start"])) throw new ParseCompileError("Transcompile error: Missing 'start' parameter in <ste:for>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["start"]); - $code .= "\$outputstack_i--;\n\$${loopname}_start = array_pop(\$outputstack);\n"; + $code .= "\$${loopname}_start = " . _transcompile($ast->params["start"], True) . ";\n"; if(empty($ast->params["stop"])) throw new ParseCompileError("Transcompile error: Missing 'end' parameter in <ste:for>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["stop"]); - $code .= "\$outputstack_i--;\n\$${loopname}_stop = array_pop(\$outputstack);\n"; + $code .= "\$${loopname}_stop = " . _transcompile($ast->params["stop"], True) . ";\n"; + $step = NULL; /* i.e. not known at compilation time */ if(empty($ast->params["step"])) - $code .= "\$${loopname}_step = 1;\n"; + $step = 1; + else if((count($ast->params["step"]) == 1) and ($ast->params["step"][0] instanceof TextNode)) + $step = $ast->params["step"][0] + 0; else - { - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["step"]); - $code .= "\$outputstack_i--;\n\$${loopname}_step = array_pop(\$outputstack);\n"; - } + $code .= "\$${loopname}_step = " . _transcompile($ast->params["step"], True) . ";\n"; if(!empty($ast->params["counter"])) - { - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["counter"]); - $code .= "\$outputstack_i--;\n\$${loopname}_countername = array_pop(\$outputstack);\n"; - } + $code .= "\$${loopname}_countername = " . _transcompile($ast->params["counter"], True) . ";\n"; $loopbody = empty($ast->params["counter"]) ? "" : "\$ste->set_var_by_name(\$${loopname}_countername, \$${loopname}_counter);\n"; $loopbody .= _transcompile($ast->sub); $loopbody = indent_code("{\n" . loopbody(indent_code($loopbody)) . "\n}\n"); - $code .= "if(\$${loopname}_step == 0)\n\tthrow new \Exception('Runtime Error: step can not be 0 in <ste:for>. Stop.');\n"; - $code .= "if(\$${loopname}_step > 0)\n{\n"; - $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; - $code .= $loopbody; - $code .= "\n}\nelse\n{\n"; - $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; - $code .= $loopbody; - $code .= "\n}\n"; + if($step === NULL) + { + $code .= "if(\$${loopname}_step == 0)\n\tthrow new \Exception('Runtime Error: step can not be 0 in <ste:for>.');\n"; + $code .= "if(\$${loopname}_step > 0)\n{\n"; + $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; + $code .= $loopbody; + $code .= "\n}\nelse\n{\n"; + $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; + $code .= $loopbody; + $code .= "\n}\n"; + } + else if($step == 0) + throw new ParseCompileError("Transcompile Error: step can not be 0 in <ste:for>.", $ast->tpl, $ast->offset); + else if($step > 0) + $code .= "for(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += $step)\n$loopbody\n"; + else + $code .= "for(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += $step)\n$loopbody\n"; return $code; }, @@ -632,39 +645,30 @@ $ste_builtins = array( if(empty($ast->params["array"])) throw new ParseCompileError("Transcompile Error: array not given in <ste:foreach>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["array"]); - $code .= "\$outputstack_i--;\n\$${loopname}_arrayvar = array_pop(\$outputstack);\n"; + $code .= "\$${loopname}_arrayvar = " . _transcompile($ast->params["array"], True) . ";\n"; if(empty($ast->params["value"])) throw new ParseCompileError("Transcompile Error: value not given in <ste:foreach>.", $ast->tpl, $ast->offset); - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["value"]); - $code .= "\$outputstack_i--;\n\$${loopname}_valuevar = array_pop(\$outputstack);\n"; + $code .= "\$${loopname}_valuevar = " . _transcompile($ast->params["value"], True) . ";\n"; if(!empty($ast->params["key"])) - { - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["key"]); - $code .= "\$outputstack_i--;\n\$${loopname}_keyvar = array_pop(\$outputstack);\n"; - } + $code .= "\$${loopname}_keyvar = " . _transcompile($ast->params["key"], True) . ";\n"; if(!empty($ast->params["counter"])) - { - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["counter"]); - $code .= "\$outputstack_i--;\n\$${loopname}_countervar = array_pop(\$outputstack);\n"; - } + $code .= "\$${loopname}_countervar = " . _transcompile($ast->params["counter"], True) . ";\n"; + $loopbody = ""; $code .= "\$${loopname}_array = \$ste->get_var_by_name(\$${loopname}_arrayvar);\n"; $code .= "if(!is_array(\$${loopname}_array))\n\t\$${loopname}_array = array();\n"; - $code .= "\$${loopname}_counter = -1;\n"; + if(!empty($ast->params["counter"])) + { + $code .= "\$${loopname}_counter = -1;\n"; + $loopbody .= "\$${loopname}_counter++;\n\$ste->set_var_by_name(\$${loopname}_countervar, \$${loopname}_counter);\n"; + } - $loopbody = "\$${loopname}_counter++;\n\$ste->set_var_by_name(\$${loopname}_valuevar, \$${loopname}_value);\n"; + $loopbody = "\$ste->set_var_by_name(\$${loopname}_valuevar, \$${loopname}_value);\n"; if(!empty($ast->params["key"])) $loopbody .= "\$ste->set_var_by_name(\$${loopname}_keyvar, \$${loopname}_key);\n"; - if(!empty($ast->params["counter"])) - $loopbody .= "\$ste->set_var_by_name(\$${loopname}_countervar, \$${loopname}_counter);\n"; $loopbody .= "\n"; $loopbody .= _transcompile($ast->sub); $loopbody = "{\n" . loopbody(indent_code($loopbody)) . "\n}\n"; @@ -692,9 +696,7 @@ $ste_builtins = array( $blknamevar = "blockname_" . str_replace(".", "_", uniqid("", True)); - $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["name"]); - $code .= "\$outputstack_i--;\n\$${blknamevar} = array_pop(\$outputstack);\n"; + $code = "\$${blknamevar} = " . _transcompile($ast->params["name"], True) . ";\n"; $tmpblk = uniqid("", True); $code .= "\$ste->blocks['$tmpblk'] = array_pop(\$outputstack);\n\$ste->blockorder[] = '$tmpblk';\n\$outputstack = array('');\n\$outputstack_i = 0;\n"; @@ -711,20 +713,14 @@ $ste_builtins = array( if(empty($ast->params["name"])) throw new ParseCompileError("Transcompile Error: name missing in <ste:load>.", $ast->tpl, $ast->offset); - $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["name"]); - $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= \$ste->load(array_pop(\$outputstack));\n"; - - return $code; + return "\$outputstack[\$outputstack_i] .= \$ste->load(" . _transcompile($ast->params["name"], True) . ");\n"; }, "mktag" => function($ast) { if(empty($ast->params["name"])) throw new ParseCompileError("Transcompile Error: name missing in <ste:mktag>.", $ast->tpl, $ast->offset); - $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["name"]); - $code .= "\$outputstack_i--;\n\$tagname = array_pop(\$outputstack);\n"; + $tagname = _transcompile($ast->params["name"], True); $fxbody = "\$outputstack = array(); \$outputstack_i = 0;\$ste->vars['_tag_parameters'] = \$params;\n"; @@ -734,14 +730,14 @@ $ste_builtins = array( $code .= _transcompile($ast->params["mandatory"]); $code .= "\$outputstack_i--;\n\$mandatory_params = explode('|', array_pop(\$outputstack));\n"; - $fxbody .= "foreach(\$mandatory_params as \$mp)\n{\n\tif(!isset(\$params[\$mp]))\n\t\tthrow new \Exception(\"Runtime Error: \$mp missing in <ste:\$tagname>. Stop.\");\n}"; + $fxbody .= "foreach(\$mandatory_params as \$mp)\n{\n\tif(!isset(\$params[\$mp]))\n\t\tthrow new \Exception(\"Runtime Error: \$mp missing in <ste:\" . $tagname . \">. Stop.\");\n}"; } $fxbody .= _transcompile($ast->sub); $fxbody .= "return array_pop(\$outputstack);"; - $code .= "\$tag_fx = function(\$ste, \$params, \$sub) use (\$tagname, \$mandatory_params)\n{\n" . indent_code($fxbody) . "\n};\n"; - $code .= "\$ste->register_tag(\$tagname, \$tag_fx);\n"; + $code .= "\$tag_fx = function(\$ste, \$params, \$sub) use (\$mandatory_params)\n{\n" . indent_code($fxbody) . "\n};\n"; + $code .= "\$ste->register_tag($tagname, \$tag_fx);\n"; return $code; }, @@ -755,13 +751,10 @@ $ste_builtins = array( throw new ParseCompileError("Transcompile Error: var missing in <ste:set>.", $ast->tpl, $ast->offset); $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($ast->params["var"]); - - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; $code .= _transcompile($ast->sub); + $code .= "\$outputstack_i--;\n"; - $code .= "\$outputstack_i -= 2;\n\$newvartext = array_pop(\$outputstack);\n\$varname = array_pop(\$outputstack);\n"; - $code .= "\$ste->set_var_by_name(\$varname, \$newvartext);\n"; + $code .= "\$ste->set_var_by_name(" . _transcompile($ast->params["var"], True) . ", array_pop(\$outputstack));\n"; return $code; }, @@ -780,19 +773,26 @@ function escape_text($text) return addcslashes($text, "\r\n\t\$\0..\x1f\\'\"\x7f..\xff"); } -function _transcompile($ast) /* The real transcompile function, does not add boilerplate code. */ +function _transcompile($ast, $no_outputstack = False) /* The real transcompile function, does not add boilerplate code. */ { $code = ""; global $ste_builtins; + $text_and_var_buffer = array(); + foreach($ast as $node) { if($node instanceof TextNode) - $code .= "\$outputstack[\$outputstack_i] .= \"" . escape_text($node->text) . "\";\n"; + $text_and_var_buffer[] = '"' . escape_text($node->text) . '"'; else if($node instanceof VariableNode) - $code .= "\$outputstack[\$outputstack_i] .= " . $node->transcompile() . ";\n"; + $text_and_var_buffer[] = $node->transcompile(); else if($node instanceof TagNode) { + if(!empty($text_and_var_buffer)) + { + $code .= "\$outputstack[\$outputstack_i] .= " . implode (" . ", $text_and_var_buffer) . ";\n"; + $text_and_var_buffer = array(); + } if(isset($ste_builtins[$node->name])) $code .= $ste_builtins[$node->name]($node); else @@ -801,17 +801,25 @@ function _transcompile($ast) /* The real transcompile function, does not add boi $code .= "\$$paramarray = array();\n"; foreach($node->params as $pname => $pcontent) - { - $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; - $code .= _transcompile($pcontent); - $code .= "\$outputstack_i--;\n\$${paramarray}['" . escape_text($pname) . "'] = array_pop(\$outputstack);\n"; - } + $code .= "\$${paramarray}['" . escape_text($pname) . "'] = " . _transcompile($pcontent, True) . ";\n"; - $code .= "\$outputstack[\$outputstack_i] .= \$ste->call_tag('" . escape_text($node->name) . "', \$${paramarray}, " . transcompile($node->sub) . ");\n"; + $code .= "\$outputstack[\$outputstack_i] .= \$ste->call_tag('" . escape_text($node->name) . "', \$${paramarray}, "; + $code .= empty($node->sub) ? "function(\$ste) { return ''; }" : transcompile($node->sub); + $code .= ");\n"; } } } + if(!empty($text_and_var_buffer)) + { + if(!$no_outputstack) + $code .= "\$outputstack[\$outputstack_i] .= "; + $code .= implode (" . ", $text_and_var_buffer); + if(!$no_outputstack) + $code .= ";\n"; + $text_and_var_buffer = array(); + } + return $code; } |