Document world ID limit

The max was bumbed from 11 to 256, now document it.

Task-number: QTBUG-69904
Change-Id: I6cbf64afe3409c4722d7a903d833124880b32bc0
Reviewed-by: Leena Miettinen <[email protected]>
Reviewed-by: Kai Koehne <[email protected]>

Author: Allan Sandfeld Jensen

src/webengine/api/qquickwebenginescript.cpp

@@ -86,7 +86,8 @@ QT_BEGIN_NAMESPACE
 /*!
     \enum QQuickWebEngineScript::ScriptWorldId
 
-    The world ID defining which isolated world the script is executed in.
+    The world ID defining which isolated world the script is executed in. Besides these predefined
+    IDs custom IDs can be used, but must be integers between \c 0 and \c 256.
 
     \value MainWorld
            The world used by the page's web contents. It can be useful in order to expose custom

src/webengine/doc/src/webengineview_lgpl.qdoc

@@ -365,7 +365,7 @@
     \since QtWebEngine 1.3
 
     JavaScript world that the web channel instance used by this view is
-    installed in.
+    installed in. The world must be a number between \c 0 and \c 256.
 */
 
 /*!

src/webenginewidgets/api/qwebenginescript.cpp

@@ -224,6 +224,8 @@ quint32 QWebEngineScript::worldId() const
 
 /*!
     Sets the world ID of the isolated world to \a id when running this script.
+
+    Must be between \c 0 and \c 256.
  */
 void QWebEngineScript::setWorldId(quint32 id)
 {

src/webenginewidgets/doc/src/qwebenginepage_lgpl.qdoc

@@ -718,9 +718,9 @@
     \since 5.7
 
     Runs the JavaScript code contained in \a scriptSource in the world specified by \a worldId.
-    The world ID values are the same as provided by QWebEngineScript::ScriptWorldId. Using the
-    \e runJavaScript() versions without the world ID is the same as running the script in the
-    \c MainWorld.
+    The world ID values are the same as provided by QWebEngineScript::ScriptWorldId, and between \c 0
+    and \c 256. Using the \e runJavaScript() versions without the world ID is the same as running the
+    script in the \c MainWorld.
 
     When the script has been executed, \a resultCallback is called with the result of the last
     executed statement. \c resultCallback can be any of a function pointer, a functor or a lambda,