Merge pull request #285 from frnknglrt/master

Proposed fix for #284

src/main/kotlin/kweb/Kweb.kt

@@ -112,6 +112,8 @@ class Kweb private constructor(
             var plugins: List<KwebPlugin> = Collections.emptyList()
             var kwebConfig: KwebConfiguration = KwebDefaultConfiguration()
 
+
+
             @Deprecated("Please use the Ktor syntax for defining page handlers instead: $buildPageReplacementCode")
             var buildPage: (WebBrowser.() -> Unit)? = null
         }
@@ -298,6 +300,7 @@ class Kweb private constructor(
                     }
                 } catch (e: Exception) {
                     logger.error("Exception while receiving websocket message", e)
+                    kwebConfig.onWebsocketMessageHandlingFailure(e)
                 }
             }
         } finally {

src/main/kotlin/kweb/config/KwebConfiguration.kt

@@ -51,6 +51,18 @@ abstract class KwebConfiguration {
         logger.debug { "Configuration has been initialized successfully" }
     }
 
+
+    /**
+     * Override this function to handle uncaught exceptions of client callbacks.
+     * E.g. if the browser sends a websocket message back to the kweb instance
+     * and the message handler throws an uncaught exception, kweb will invoke
+     * this exception handler to expose the fact that a message could not be
+     * properly handled
+     */
+    open fun onWebsocketMessageHandlingFailure(ex: Exception){
+
+    }
+
     /**
      * Override the default robots.txt behavior, which is to return with a 404. Passed a Ktor [ApplicationCall]
      * which may be used to return whatever you wish.

src/main/kotlin/kweb/html/events/events.kt

@@ -44,8 +44,8 @@ data class MouseEvent(
     val altKey: Boolean,
     val button: Int,
     val buttons: Int,
-    val clientX: Int,
-    val clientY: Int,
+    val clientX: Float,
+    val clientY: Float,
     val ctrlKey: Boolean,
     val metaKey: Boolean,
     val movementX: Int? = null,
@@ -54,8 +54,8 @@ data class MouseEvent(
     val screenX: Int,
     val screenY: Int,
     val shiftKey: Boolean,
-    val x: Int = clientX,
-    val y: Int = clientY,
+    val x: Float = clientX,
+    val y: Float = clientY,
     /** @see kweb.Element.on **/
     val retrieved: JsonElement = JsonNull
 )

src/main/resources/kweb/kweb_bootstrap.js

@@ -88,7 +88,7 @@ function debugErr(debugToken, err, errMsg) {
         const message = {id: kwebClientId, error: err};
         sendMessage(JSON.stringify(message));
     } else {
-        throw err;
+        console.error(errMsg)
     }
 }