New class: JavascriptEngine!

modules/juce_core/javascript/juce_Javascript.h

@@ -0,0 +1,92 @@
+/*
+  ==============================================================================
+
+   This file is part of the juce_core module of the JUCE library.
+   Copyright (c) 2013 - Raw Material Software Ltd.
+
+   Permission to use, copy, modify, and/or distribute this software for any purpose with
+   or without fee is hereby granted, provided that the above copyright notice and this
+   permission notice appear in all copies.
+
+   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
+   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
+   NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+   DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+   IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ------------------------------------------------------------------------------
+
+   NOTE! This permissive ISC license applies ONLY to files within the juce_core module!
+   All other JUCE modules are covered by a dual GPL/commercial license, so if you are
+   using any other modules, be sure to check that you also comply with their license.
+
+   For more details, visit www.juce.com
+
+  ==============================================================================
+*/
+
+
+/**
+    A simple javascript interpreter!
+
+    It's not fully standards-compliant, and won't be as fast as the fancy JIT-compiled
+    engines that you get in browsers, but this is an extremely compact, low-overhead javascript
+    interpreter, which is integrated with the juce var and DynamicObject classes. If you need
+    a few simple bits of scripting in your app, and want to be able to easily let the JS
+    work with native objects defined as DynamicObject subclasses, then this might do the job.
+
+    To use, simply create an instance of this class and call execute() to run your code.
+    Variables that the script sets can be retrieved with evaluate(), and if you need to provide
+    native objects for the script to use, you can add them with registerNativeObject().
+
+    One caveat: Because the values and objects that the engine works with are DynamicObject
+    and var objects, they use reference-counting rather than garbage-collection, so if your
+    script creates complex connections between objects, you run the risk of creating cyclic
+    dependencies and hence leaking.
+*/
+class JavascriptEngine
+{
+public:
+    /** Creates an instance of the engine.
+        This creates a root namespace and defines some basic Object, String, Array
+        and Math library methods.
+    */
+    JavascriptEngine();
+
+    /** Destructor. */
+    ~JavascriptEngine();
+
+    /** Attempts to parse and run a block of javascript code.
+        If there's a parse or execution error, the error description is returned in
+        the result.
+        You can specify a maximum time for which the program is allowed to run, and
+        it'll return with an error message if this time is exceeded.
+    */
+    Result execute (const String& javascriptCode,
+                    RelativeTime maximumRunTime = RelativeTime::seconds (10));
+
+    /** Attempts to parse and run a javascript expression, and returns the result.
+        If there's a syntax error, or the expression can't be evaluated, the return value
+        will be var::undefined(). The errorMessage parameter gives you a way to find out
+        any parsing errors.
+        You can specify a maximum time for which the program is allowed to run, and
+        it'll return with an error message if this time is exceeded.
+    */
+    var evaluate (const String& javascriptCode,
+                  Result* errorMessage = nullptr,
+                  RelativeTime maximumRunTime = RelativeTime::seconds (10));
+
+    /** Adds a native object to the root namespace.
+        The object passed-in is reference-counted, and will be retained by the
+        engine until the engine is deleted. The name must be a simple JS identifier,
+        without any dots.
+    */
+    void registerNativeObject (Identifier objectName, DynamicObject* object);
+
+private:
+    struct RootObject;
+    ReferenceCountedObjectPtr<RootObject> root;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (JavascriptEngine)
+};

modules/juce_core/juce_core.cpp

@@ -119,7 +119,8 @@ namespace juce
 #include "files/juce_FileOutputStream.cpp"
 #include "files/juce_FileSearchPath.cpp"
 #include "files/juce_TemporaryFile.cpp"
-#include "json/juce_JSON.cpp"
+#include "javascript/juce_JSON.cpp"
+#include "javascript/juce_Javascript.cpp"
 #include "containers/juce_DynamicObject.cpp"
 #include "logging/juce_FileLogger.cpp"
 #include "logging/juce_Logger.cpp"

modules/juce_core/juce_core.h

@@ -234,7 +234,8 @@ extern JUCE_API void JUCE_CALLTYPE logAssertion (const char* file, int line) noe
 #include "files/juce_TemporaryFile.h"
 #include "streams/juce_FileInputSource.h"
 #include "logging/juce_FileLogger.h"
-#include "json/juce_JSON.h"
+#include "javascript/juce_JSON.h"
+#include "javascript/juce_Javascript.h"
 #include "maths/juce_BigInteger.h"
 #include "maths/juce_Expression.h"
 #include "maths/juce_Random.h"

modules/juce_core/juce_module_info

@@ -25,7 +25,7 @@
                       "logging/*",
                       "system/*",
                       "xml/*",
-                      "json/*",
+                      "javascript/*",
                       "zip/*",
                       "unit_tests/*",
                       "misc/*",