git.roojs.org Git - app.Builder.js/blob - src/Palete/Javascript.vala

   1
   2
   3
   4 namespace Palete {
   5
   6         public errordomain JavascriptError {
   7                 MISSING_METHOD,
   8                 MISSING_FILE
   9
  10         }
  11
  12         Javascript instance = null;
  13
  14         public class Javascript {
  15
  16
  17                 public static JSCore.Object class_constructor(
  18                                 JSCore.Context ctx,
  19                                 JSCore.Object constructor,
  20                                 JSCore.Value[] arguments,
  21                               out JSCore.Value exception)
  22                 {
  23                         var c = new JSCore.Class (class_definition);
  24                         var o = new JSCore.Object (ctx, c, null);
  25                                 exception = null;
  26                         return o;
  27                 }
  28                 static const JSCore.StaticFunction[] class_functions = {
  29                          { null, null, 0 }
  30                 };
  31                 static const JSCore.ClassDefinition class_definition = {
  32                     0,
  33                     JSCore.ClassAttribute.None,
  34                     "App",
  35                     null,
  36
  37                     null,
  38                     class_functions,
  39
  40                     null,
  41                     null,
  42
  43                     null,
  44                     null,
  45                     null,
  46                     null,
  47
  48                     null,
  49                     null,
  50                     class_constructor,
  51                     null,
  52                     null
  53                 };
  54
  55
  56                 public JSCore.GlobalContext js_global_context =  null;
  57
  58                 public static Javascript singleton()
  59                 {
  60                         if (instance == null) {
  61                                 instance = new Javascript();
  62                         }
  63                         return instance;
  64                 }
  65                 public Javascript()
  66                 {
  67                         var goc = new JSCore.Class(  class_definition );
  68                         this.js_global_context = new JSCore.GlobalContext(goc);
  69
  70
  71                 }
  72                 public int validate(string code, out string res)
  73                 {
  74                         JSCore.Value ex;
  75                         unowned   JSCore.GlobalContext ctx = this.js_global_context;
  76                         var ret = this.js_global_context.check_script_syntax(
  77                                    new JSCore.String.with_utf8_c_string(code),
  78                                    null,
  79                                    0,
  80                                    out ex
  81                         );
  82                         res = "";
  83                         if (ex.is_null(ctx)) {
  84                                 return -1;
  85                         }
  86
  87
  88                         var exo = ex.to_object(ctx, null);
  89                         unowned JSCore.PropertyNameArray property_names = exo.copy_property_names (ctx);
  90
  91
  92
  93
  94                         var js_string = new JSCore.String.with_utf8_c_string("line");
  95                         var line = exo.get_property(ctx, js_string, null).to_number(ctx,null);
  96
  97
  98
  99                         // see if we can convert exception string
 100                         char *c_string = new char[1024];
 101                         var err_string = ex.to_string_copy (ctx, null);
 102                         err_string.get_utf8_c_string (c_string, 1023);
 103                         res = (string)c_string;
 104                         //print ("Error on line %d\n%s\n", (int)line, res);
 105
 106                         var rline = (int) line;
 107
 108                         return rline > 0 ? rline -1 : 0;
 109
 110
 111                 }
 112                 /**
 113                  * extension API concept..
 114                  * javascript file.. loaded into jscore,
 115                  * then a method is called, with a string argument (json encoded)
 116                  *
 117                  */
 118                 public void executeFile(string fname, string method, string json)
 119                 {
 120                         string file_data;
 121                         if (!FileUtils.test (fname, FileTest.EXISTS)) {
 122                                 throw new JavascriptError.MISSING_FILE("Plugin: file not found %s", fname);
 123                         }
 124
 125                         FileUtils.get_contents(fname, out file_data);
 126
 127                         var jfile_data = new JSCore.String.with_utf8_c_string(file_data);
 128                         var jmethod = new JSCore.String.with_utf8_c_string(method);
 129                         var json_args = new JSCore.String.with_utf8_c_string(json);
 130
 131                         JSCore.Value ex;
 132
 133                         var goc = new JSCore.Class(  class_definition );
 134                         var ctx = new JSCore.GlobalContext(goc);
 135                         var othis = ctx.get_global_object();
 136
 137                         var eval = ctx.evaluate_script (
 138                                                 jfile_data,
 139                                                 othis,
 140                                                 null,
 141                                 0,
 142                                 out ex
 143                                 );
 144
 145
 146                         if (!othis.has_property(ctx,jmethod)) {
 147                                 throw new JavascriptError.MISSING_METHOD ("Plugin: missing method  %s", method);
 148                                 return;
 149                         }
 150
 151                         var val =  othis.get_property (ctx, jmethod, out ex);
 152
 153                         if (!val.is_object(ctx)) {
 154                                 throw new JavascriptError.MISSING_METHOD ("Plugin: not a property not found  %s", method);
 155                         }
 156                         var oval = val.to_object(ctx, out ex);
 157
 158                         if (!oval.is_function(ctx)) {
 159                                 throw new JavascriptError.MISSING_METHOD ("Plugin: not a method  %s", method);
 160                         }
 161                         JSCore.Value[] args = {};
 162                         args += new JSCore.Value.string(ctx,json_args);
 163
 164                         var res = oval.call_as_function(ctx, othis, args, out ex);
 165
 166
 167
 168
 169                 }
 170
 171
 172
 173         }
 174
 175
 176
 177
 178 }
 179