git.roojs.org Git - roobuilder/blob - src/Palete/Javascript.vala

   1 /*
   2 extern JSCore.Value jscore_object_call_as_function(
   3         JSCore.Context ctx,
   4         JSCore.Object object,
   5         JSCore.Object thisObject,
   6         string  val,
   7         out JSCore.Value exception
   8         );
   9
  10 */
  11
  12
  13 namespace Palete {
  14
  15         public errordomain JavascriptError {
  16                 MISSING_METHOD,
  17                 MISSING_FILE
  18
  19         }
  20
  21         Javascript instance = null;
  22
  23         public class Javascript {
  24
  25 /*
  26                 public static JSCore.Object class_constructor(
  27                                 JSCore.Context ctx,
  28                                 JSCore.Object constructor,
  29                                 JSCore.Value[] arguments,
  30                               out JSCore.Value exception)
  31                 {
  32                         var c = new JSCore.Class (class_definition);
  33                         var o = new JSCore.Object (ctx, c, null);
  34                                 exception = null;
  35                         return o;
  36                 }
  37                 const JSCore.StaticFunction[] class_functions = {
  38                          { null, null, 0 }
  39                 };
  40                 const JSCore.ClassDefinition class_definition = {
  41                     0,
  42                     JSCore.ClassAttribute.None,
  43                     "App",
  44                     null,
  45
  46                     null,
  47                     class_functions,
  48
  49                     null,
  50                     null,
  51
  52                     null,
  53                     null,
  54                     null,
  55                     null,
  56
  57                     null,
  58                     null,
  59                     class_constructor,
  60                     null,
  61                     null
  62                 };
  63
  64
  65                 public JSCore.GlobalContext js_global_context =  null;
  66 */
  67                 public static Javascript singleton()
  68                 {
  69                         if (instance == null) {
  70                                 instance = new Javascript();
  71                         }
  72                         return instance;
  73                 }
  74                 public Javascript()
  75                 {
  76                         //var goc = new JSCore.Class(  class_definition );
  77                         //this.js_global_context = new JSCore.GlobalContext(goc);
  78
  79
  80                 }
  81                 public void validate(string code, JsRender.JsRender file)
  82                 {
  83
  84                         JSC.Exception? ex;
  85                         var  ctx = new JSC.Context();
  86
  87                         //GLib.debug("Check syntax %s", code);
  88
  89                         ctx.check_syntax(code, code.length, JSC.CheckSyntaxMode.SCRIPT, "", 1 ,out ex);
  90                     var ar = file.getErrors("ERR");
  91                         ar.remove_all();
  92                         if (ex == null) {
  93                                 return ; // this.compressionErrors(code, fn); << to slow on large files?
  94
  95                         }
  96
  97                         //GLib.debug("go        t error %d %s", (int)ex.get_line_number() , ex.get_message() );
  98
  99
 100                         var ret = new CompileError.new_jserror(file, "ERR", (int) ex.get_line_number() -1 , ex.get_message());
 101
 102                         ar.append(ret);
 103
 104
 105
 106                 }
 107
 108
 109                 public Json.Object   compressionErrors(string code , string fn)
 110                 {
 111                         // this uses the roojspacker code to try and compress the code.
 112                         // it should highlight errors before we actually push live the code.
 113
 114                         // standard error format:  file %s, line %s, Error
 115
 116
 117                         var cfg = new JSDOC.PackerRun();
 118                         cfg.opt_keep_whitespace = false;
 119                         cfg.opt_skip_scope = false;
 120                         cfg.opt_dump_tokens = false;
 121                         cfg.opt_clean_cache = false;
 122
 123
 124                         var p = new JSDOC.Packer(cfg);
 125
 126
 127                         p.packFile(code, fn,"");
 128                         //state.showCompileResult(p.result);
 129                         /*
 130                         var g = new Json.Generator ();
 131
 132                         g.pretty = true;
 133                         g.indent = 2;
 134                         var n = new Json.Node(Json.NodeType.OBJECT);
 135                         n.set_object(p.result);
 136                         g.set_root (n);
 137
 138                         GLib.debug("got %s", g.to_data (null));
 139                         */
 140                         return p.result;
 141
 142                 }
 143
 144                 /**
 145                  * extension API concept..
 146                  * javascript file.. loaded into jscore,
 147                  * then a method is called, with a string argument (json encoded)
 148                  *
 149                  */
 150                  /*
 151                 public string executeFile(string fname, string call_method, string js_data)
 152                                 throws JavascriptError
 153                 {
 154
 155                         string file_data;
 156                         if (!FileUtils.test (fname, FileTest.EXISTS)) {
 157                                 throw new JavascriptError.MISSING_FILE("Plugin: file not found %s", fname);
 158                         }
 159                         try {
 160                                 FileUtils.get_contents(fname, out file_data);
 161                         } catch (GLib.Error e) {
 162                                 GLib.debug("Error file load failed: %s", e.message);
 163                                 return "";
 164                         }
 165                         var jfile_data = new JSCore.String.with_utf8_c_string(file_data);
 166                         var jmethod = new JSCore.String.with_utf8_c_string(call_method);
 167                         //var json_args = new JSCore.String.with_utf8_c_string(js_data);
 168
 169                         JSCore.Value exa;
 170                         JSCore.Value exb;
 171                         unowned JSCore.Value exc;
 172                            JSCore.Value exd;
 173                            unowned JSCore.Value exe;
 174
 175                         var goc = new JSCore.Class(  class_definition );
 176                         var ctx = new JSCore.GlobalContext(goc);
 177                         var othis = ctx.get_global_object();
 178
 179                         ctx.evaluate_script (
 180                                                 jfile_data,
 181                                                 othis,
 182                                                 null,
 183                                 0,
 184                                 out exa
 185                                 );
 186
 187
 188                         if (!othis.has_property(ctx,jmethod)) {
 189                                 throw new JavascriptError.MISSING_METHOD ("Plugin: missing method  %s", call_method);
 190
 191                         }
 192
 193                         var val =  othis.get_property (ctx, jmethod, out exb);
 194
 195                         if (!val.is_object(ctx)) {
 196                                 throw new JavascriptError.MISSING_METHOD ("Plugin: not a property not found  %s", call_method);
 197                         }
 198                         var oval = val.to_object(ctx,  out  exc);
 199
 200                         if (!oval.is_function(ctx)) {
 201                                 throw new JavascriptError.MISSING_METHOD ("Plugin: not a method  %s", call_method);
 202                         }
 203                         throw new JavascriptError.MISSING_METHOD ("Plugin: not supported anymore");
 204                         return "";
 205
 206                          var res = jscore_object_call_as_function(
 207                                 ctx, oval, othis, js_data, out exd
 208                                 );
 209                      // this will never work, as we can not create arrays of Values - due to no
 210                      // free function being available..
 211                          //var args =  new JSCore.Value[1] ;
 212                          //args[0] = new JSCore.Value.string(ctx,json_args) ;
 213
 214                          //unowned JSCore.Value res = oval.call_as_function(ctx, othis, null, out exd);
 215                         // extract the text value from res...
 216                          JSCore.String  sv = res.to_string_copy ( ctx,  out  exe);
 217                          var length = sv.get_maximum_utf8_c_string_size();
 218                          var buf = new char[length];
 219
 220                          sv.get_utf8_c_string( buf, length);
 221
 222
 223                          print("ret:%s\n",(string)  buf);
 224                          return (string) buf;
 225
 226                 }
 227                 */
 228
 229
 230         }
 231
 232
 233
 234
 235 }
 236