jscript: Make Function object invocation a special case in IDispatchEx implementation.

dlls/jscript/dispex.c

@@ -391,7 +391,6 @@ static HRESULT invoke_prop_func(jsdisp_t *This, jsdisp_t *jsthis, dispex_prop_t
     case PROP_BUILTIN: {
         DISPPARAMS params;
         VARIANT buf[6];
-        vdisp_t vthis;
 
         if(flags == DISPATCH_CONSTRUCT && (prop->flags & PROPF_METHOD)) {
             WARN("%s is not a constructor\n", debugstr_w(prop->name));
@@ -402,9 +401,16 @@ static HRESULT invoke_prop_func(jsdisp_t *This, jsdisp_t *jsthis, dispex_prop_t
         if(FAILED(hres))
             return hres;
 
-        set_jsdisp(&vthis, jsthis);
-        hres = prop->u.p->invoke(This->ctx, &vthis, flags, &params, retv, ei);
-        vdisp_release(&vthis);
+        if(prop->name || jsthis->builtin_info->class != JSCLASS_FUNCTION) {
+            vdisp_t vthis;
+
+            set_jsdisp(&vthis, jsthis);
+            hres = prop->u.p->invoke(This->ctx, &vthis, flags, &params, retv, ei);
+            vdisp_release(&vthis);
+        }else {
+            /* Function object calls are special case */
+            hres = Function_invoke(This, flags, &params, retv, ei);
+        }
         if(params.rgvarg != buf && params.rgvarg != dp->rgvarg)
             heap_free(params.rgvarg);
         return hres;

dlls/jscript/function.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#include <assert.h>
+
 #include "jscript.h"
 #include "engine.h"
 
@@ -305,6 +307,25 @@ static HRESULT function_to_string(FunctionInstance *function, BSTR *ret)
     return S_OK;
 }
 
+HRESULT Function_invoke(jsdisp_t *func_this, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
+{
+    FunctionInstance *function;
+
+    TRACE("\n");
+
+    assert(is_class(func_this, JSCLASS_FUNCTION));
+    function = (FunctionInstance*)func_this;
+
+    if(function->value_proc)
+        return invoke_value_proc(function->dispex.ctx, function, get_this(dp), flags, dp, retv, ei);
+
+    if(flags == DISPATCH_CONSTRUCT)
+        return invoke_constructor(function->dispex.ctx, function, dp, retv, ei);
+
+    assert(flags == DISPATCH_METHOD);
+    return invoke_source(function->dispex.ctx, function, get_this(dp), dp, retv, ei);
+}
+
 static HRESULT Function_length(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
         VARIANT *retv, jsexcept_t *ei)
 {

dlls/jscript/jscript.h

@@ -225,6 +225,7 @@ VARIANT_BOOL jsdisp_is_own_prop(jsdisp_t *obj, BSTR name) DECLSPEC_HIDDEN;
 HRESULT create_builtin_function(script_ctx_t*,builtin_invoke_t,const WCHAR*,const builtin_info_t*,DWORD,
         jsdisp_t*,jsdisp_t**) DECLSPEC_HIDDEN;
 HRESULT Function_value(script_ctx_t*,vdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*) DECLSPEC_HIDDEN;
+HRESULT Function_invoke(jsdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*);
 
 HRESULT throw_eval_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*) DECLSPEC_HIDDEN;
 HRESULT throw_generic_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*) DECLSPEC_HIDDEN;