Return error information from pdfium to JS.

This implements the previously unimplemented JS_Error() function.

Along the way:
- fix some IWYU when the include order in global.cpp was perturbed.
- remove some uses of JS_ErrorString, to increase transparency.
- use vp.IsSetting() in place of !vp.IsGetting() for clarity.
- specify an error string on several error return paths.
- add an error string for writing readonly properties.
- rename an error string constant to reflect the actual message.
- replace calls to variadic Format() with a function doing string appends.
- remove unused JS_GetClassName()

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/963193003

1 files changed, 8 insertions, 6 deletions

diff --git a/fpdfsdk/src/javascript/global.cpp b/fpdfsdk/src/javascript/global.cpp
index 587ba85219..cc18b2906c 100644
--- a/fpdfsdk/src/javascript/global.cpp
+++ b/fpdfsdk/src/javascript/global.cpp
@@ -4,15 +4,16 @@
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "../../include/javascript/JavaScript.h"
 #include "../../include/javascript/IJavaScript.h"
+#include "../../include/javascript/JS_Context.h"
 #include "../../include/javascript/JS_Define.h"
+#include "../../include/javascript/JS_EventHandler.h"
+#include "../../include/javascript/JS_GlobalData.h"
 #include "../../include/javascript/JS_Object.h"
 #include "../../include/javascript/JS_Value.h"
-#include "../../include/javascript/JS_GlobalData.h"
+#include "../../include/javascript/JavaScript.h"
 #include "../../include/javascript/global.h"
-#include "../../include/javascript/JS_EventHandler.h"
-#include "../../include/javascript/JS_Context.h"
+#include "../../include/javascript/resource.h"
 
 /* ---------------------------- global ---------------------------- */
 
@@ -270,9 +271,10 @@ FX_BOOL global_alternate::DoProperty(IFXJS_Context* cc, FX_LPCWSTR propname, CJS
 
 FX_BOOL global_alternate::setPersistent(IFXJS_Context* cc, const CJS_Parameters& params, CJS_Value& vRet, JS_ErrorString& sError)
 {
+	CJS_Context* pContext = static_cast<CJS_Context*>(cc);
 	if (params.size() != 2)
 	{
-		//sError = JSGetStringFromID(IDS_STRING_JSPARAMERROR);	
+		sError = JSGetStringFromID(pContext, IDS_STRING_JSPARAMERROR);
 		return FALSE;
 	}
 
@@ -288,7 +290,7 @@ FX_BOOL global_alternate::setPersistent(IFXJS_Context* cc, const CJS_Parameters&
 		}
 	}
 
-	//sError = JSGetStringFromID(IDS_JSPARAM_INCORRECT);	
+	sError = JSGetStringFromID(pContext, IDS_STRING_JSNOGLOBAL);
 	return FALSE;
 }