includes/clientside/static/template-compiler.js
author Dan
Thu, 14 Feb 2008 21:57:04 -0500
changeset 423 990ccfb20120
parent 212 30b857a6b811
child 582 a38876c0793c
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Merging changes from scribus
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// An implementation of Enano's template compiler in Javascript. Same exact API
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// as the PHP version - constructor accepts text, then the assign_vars, assign_bool, and run methods.
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function templateParser(text)
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{
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  this.tpl_code    = text;
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  this.tpl_strings = new Object();
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  this.tpl_bool    = new Object();
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  this.assign_vars = __tpAssignVars;
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  this.assign_bool = __tpAssignBool;
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  this.run         = __tpRun;
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}
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function __tpAssignVars(vars)
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{
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  for(var i in vars)
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  {
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    this.tpl_strings[i] = vars[i];
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  }
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}
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function __tpAssignBool(vars)
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{
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  for(var i in vars)
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  {
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    this.tpl_bool[i] = ( vars[i] ) ? true : false; 
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  }
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}
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function __tpRun()
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{
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  if(typeof(this.tpl_code) == 'string')
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  {
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    tpl_code = __tpCompileTemplate(this.tpl_code);
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    try {
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      compiled = eval(tpl_code);
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    }
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    catch(e)
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    {
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      alert(e);
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      aclDebug(tpl_code);
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    }
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    return compiled;
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  }
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  return false;
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}
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function __tpCompileTemplate(code)
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{
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  // Compile plaintext/template code to javascript code
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  code = code.replace(/\\/g, "\\\\");
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  code = code.replace(/\'/g,  "\\'");
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  code = code.replace(/\"/g,  '\\"');
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  code = code.replace(new RegExp(unescape('%0A'), 'g'), '\\n');
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  code = "'" + code + "'";
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  code = code.replace(/\{([A-z0-9_-]+)\}/ig, "' + this.tpl_strings['$1'] + '");
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  code = code.replace(/\{lang:([a-z0-9_]+)\}/g, "' + $lang.get('$1') + '");
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  code = code.replace(/\<!-- BEGIN ([A-z0-9_-]+) --\>([\s\S]*?)\<!-- BEGINELSE \1 --\>([\s\S]*?)\<!-- END \1 --\>/ig, "' + ( ( this.tpl_bool['$1'] == true ) ? '$2' : '$3' ) + '");
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  code = code.replace(/\<!-- BEGIN ([A-z0-9_-]+) --\>([\s\S]*?)\<!-- END \1 --\>/ig, "' + ( ( this.tpl_bool['$1'] == true ) ? '$2' : '' ) + '");
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  return code;
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}
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function __tpExtractVars(code)
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{
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  code = code.replace('\\', "\\\\");
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  code = code.replace("'",  "\\'");
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  code = code.replace('"',  '\\"');
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  code = code.replace(new RegExp(unescape('%0A'), 'g'), "\\n");
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  code = code.match(/\<!-- VAR ([A-z0-9_-]+) --\>([\s\S]*?)\<!-- ENDVAR \1 -->/g);
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  code2 = '';
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  for(var i in code)
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    if(typeof(code[i]) == 'string')
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      code2 = code2 + code[i];
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  code = code2.replace(/\<!-- VAR ([A-z0-9_-]+) --\>([\s\S]*?)\<!-- ENDVAR \1 -->/g, "'$1' : \"$2\",");
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  code = '( { ' + code + ' "________null________" : false } )';
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  vars = eval(code);
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  return vars;
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}
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