Examples of com.google.gwt.dev.js.ast.JsFunction

com.google.gwt.dev.js.ast.JsFunction
Represents a JavaScript function expression.

        JsInvocation call = new JsInvocation();
        JsNameRef toStringRef = new JsNameRef(getPolyName(toStringMeth));
        toStringRef.setQualifier(new JsThisRef());
        call.setQualifier(toStringRef);
        JsReturn jsReturn = new JsReturn(call);
        JsFunction rhs = new JsFunction(topScope);
        JsBlock body = new JsBlock();
        body.getStatements().add(jsReturn);
        rhs.setBody(body);


        // asg
        JsExpression asg = createAssignment(lhs, rhs);
        globalStmts.add(new JsExprStmt(asg));
      }

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      JsStatements globalStmts = jsProgram.getGlobalBlock().getStatements();


      // declare all methods into the global scope
      for (int i = 0; i < jsFuncs.size(); ++i) {
        JsFunction func = (JsFunction) jsFuncs.get(i);
        if (func != null) {
          globalStmts.add(func.makeStmt());
        }
      }


      if (typeOracle.isInstantiatedType(x)) {
        generateClassSetup(x, globalStmts);

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      List/* <JsStatement> */jsFields = popList(x.fields.size()); // fields


      JsStatements globalStmts = jsProgram.getGlobalBlock().getStatements();


      if (typeOracle.hasDirectClinit(x)) {
        JsFunction clinitFunc = (JsFunction) jsFuncs.get(0);
        handleClinit(clinitFunc, null);
        globalStmts.add(clinitFunc.makeStmt());
      }


      // setup fields
      JsVars vars = new JsVars();
      for (int i = 0; i < jsFields.size(); ++i) {

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      if (x.isAbstract()) {
        push(null);
        return;
      }


      JsFunction jsFunc = (JsFunction) methodMap.get(x);
      jsFunc.setBody(body); // body


      JsParameters jsParams = jsFunc.getParameters();
      for (int i = 0; i < params.size(); ++i) {
        JsParameter param = (JsParameter) params.get(i);
        jsParams.add(param);
      }


      /*
       * Emit a statement to declare the method's complete set of local
       * variables. JavaScript doesn't have the same concept of lexical scoping
       * as Java, so it's okay to just predeclare all local vars at the top of
       * the function, which saves us having to use the "var" keyword over and
       * over.
       * 
       * Note: it's fine to use the same JS ident to represent two different
       * Java locals of the same name since they could never conflict with each
       * other in Java. We use the alreadySeen set to make sure we don't declare
       * the same-named local var twice.
       */
      JsVars vars = new JsVars();
      Set alreadySeen = new HashSet();
      for (int i = 0; i < locals.size(); ++i) {
        JsName name = (JsName) names.get(x.locals.get(i));
        String ident = name.getIdent();
        if (!alreadySeen.contains(ident)) {
          alreadySeen.add(ident);
          vars.add(new JsVar(name));
        }
      }


      if (!vars.isEmpty()) {
        jsFunc.getBody().getStatements().add(0, vars);
      }


      JsInvocation jsInvocation = maybeCreateClinitCall(x);
      if (jsInvocation != null) {
        jsFunc.getBody().getStatements().add(0, jsInvocation.makeStmt());
      }


      push(jsFunc);
      currentMethod = null;
    }

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      // types don't push


      // Generate entry methods
      List/* <JsFunction> */entryFuncs = popList(x.entryMethods.size()); // entryMethods
      for (int i = 0; i < entryFuncs.size(); ++i) {
        JsFunction func = (JsFunction) entryFuncs.get(i);
        if (func != null) {
          globalStmts.add(func.makeStmt());
        }
      }


      generateGwtOnLoad(entryFuncs, globalStmts);

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      }
    }


    // @Override
    public void endVisit(JsniMethod x, Context ctx) {
      JsFunction jsFunc = x.getFunc();


      // replace all JSNI idents with a real JsName now that we know it
      new JsModVisitor() {
        // @Override
        public void endVisit(JsNameRef x, JsContext ctx) {
          String ident = x.getIdent();
          if (ident.charAt(0) == '@') {
            HasEnclosingType node = (HasEnclosingType) program.jsniMap.get(ident);
            assert (node != null);
            if (node instanceof JField) {
              JField field = (JField) node;
              JsName jsName = getName(field);
              assert (jsName != null);
              x.resolve(jsName);


              // See if we need to add a clinit call to a static field ref
              JsInvocation clinitCall = maybeCreateClinitCall(field);
              if (clinitCall != null) {
                JsExpression commaExpr = createCommaExpression(clinitCall, x);
                ctx.replaceMe(commaExpr);
              }
            } else {
              JMethod method = (JMethod) node;
              if (x.getQualifier() == null) {
                JsName jsName = getName(method);
                assert (jsName != null);
                x.resolve(jsName);
              } else {
                JsName jsName = getPolyName(method);
                if (jsName == null) {
                  // this can occur when JSNI references an instance method on a
                  // type that was never actually instantiated.
                  jsName = nullMethodName;
                }
                x.resolve(jsName);
              }
            }
          }
        }
      }.accept(jsFunc);


      JsInvocation jsInvocation = maybeCreateClinitCall(x);
      if (jsInvocation != null) {
        jsFunc.getBody().getStatements().add(0, jsInvocation.makeStmt());
      }


      push(jsFunc);
      currentMethod = null;
    }

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       *     init();
       *   }
       * }
       * </pre>
       */
      JsFunction gwtOnLoad = new JsFunction(topScope);
      globalStmts.add(gwtOnLoad.makeStmt());
      JsName gwtOnLoadName = topScope.declareName("gwtOnLoad");
      gwtOnLoadName.setObfuscatable(false);
      gwtOnLoad.setName(gwtOnLoadName);
      JsBlock body = new JsBlock();
      gwtOnLoad.setBody(body);
      JsScope fnScope = gwtOnLoad.getScope();
      JsParameters params = gwtOnLoad.getParameters();
      JsName errFn = fnScope.declareName("errFn");
      JsName modName = fnScope.declareName("modName");
      JsName modBase = fnScope.declareName("modBase");
      params.add(new JsParameter(errFn));
      params.add(new JsParameter(modName));
      params.add(new JsParameter(modBase));
      JsExpression asg = createAssignment(
          topScope.findExistingUnobfuscatableName("$moduleName").makeRef(),
          modName.makeRef());
      body.getStatements().add(asg.makeStmt());
      asg = createAssignment(topScope.findExistingUnobfuscatableName(
          "$moduleBase").makeRef(), modBase.makeRef());
      body.getStatements().add(asg.makeStmt());
      JsIf jsIf = new JsIf();
      body.getStatements().add(jsIf);
      jsIf.setIfExpr(errFn.makeRef());
      JsTry jsTry = new JsTry();
      jsIf.setThenStmt(jsTry);
      JsBlock callBlock = new JsBlock();
      jsIf.setElseStmt(callBlock);
      jsTry.setTryBlock(callBlock);
      for (int i = 0; i < entryFuncs.size(); ++i) {
        JsFunction func = (JsFunction) entryFuncs.get(i);
        if (func != null) {
          JsInvocation call = new JsInvocation();
          call.setQualifier(func.getName().makeRef());
          callBlock.getStatements().add(call.makeStmt());
        }
      }
      JsCatch jsCatch = new JsCatch(fnScope, "e");
      jsTry.getCatches().add(jsCatch);

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      errCall.getArguments().add(modName.makeRef());
    }


    private void generateNullFunc(JsStatements globalStatements) {
      // handle null method
      JsFunction nullFunc = new JsFunction(topScope, nullMethodName);
      nullFunc.setBody(new JsBlock());
      globalStatements.add(nullFunc.makeStmt());
    }

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      if (x != program.getTypeJavaLangString()) {
        JsName seedFuncName = getName(x);


        // seed function
        // function com_example_foo_Foo() { }
        JsFunction seedFunc = new JsFunction(topScope, seedFuncName);
        JsBlock body = new JsBlock();
        seedFunc.setBody(body);
        globalStmts.add(seedFunc.makeStmt());


        // setup prototype, assign to temp
        // _ = com_example_foo_Foo.prototype = new com_example_foo_FooSuper();
        JsNameRef lhs = prototype.makeRef();
        lhs.setQualifier(seedFuncName.makeRef());

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        globalName = topScope.declareName(mangleName, name);
      }
      names.put(x, globalName);


      // create my peer JsFunction
      JsFunction jsFunction = new JsFunction(topScope, globalName);
      methodMap.put(x, jsFunction);


      push(jsFunction.getScope());
      return true;
    }

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