Use coroutine CancellationException

app/src/main/java/com/hippo/ehviewer/client/EhClient.kt

@@ -16,9 +16,9 @@
 package com.hippo.ehviewer.client
 
 import com.hippo.ehviewer.EhApplication.Companion.okHttpClient
-import com.hippo.ehviewer.client.exception.CancelledException
 import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.lang.withUIContext
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.CoroutineStart
 import kotlinx.coroutines.Dispatchers
@@ -183,9 +183,10 @@ class EhClient {
                     }
                     withUIContext { callback?.onSuccess(result) }
                 } catch (e: Exception) {
+                    if (e is CancellationException)
+                        throw e // Don't catch coroutine CancellationException
                     e.printStackTrace()
-                    if (e !is CancelledException)
-                        withUIContext { callback?.onFailure(e) }
+                    withUIContext { callback?.onFailure(e) }
                 }
                 request.task = null
                 request.callback = null
@@ -212,15 +213,9 @@ class EhClient {
         private val mStop
             get() = !(job?.isActive ?: false)
 
-        // Called in Job thread
-        @Throws(CancelledException::class)
         fun setCall(call: Call?) {
-            if (mStop) {
-                // Stopped Job thread
-                throw CancelledException()
-            } else {
-                mCall.lazySet(call)
-            }
+            if (mStop) call?.cancel()
+            else mCall.lazySet(call)
         }
 
         fun stop() {

app/src/main/java/com/hippo/ehviewer/client/EhEngine.java

@@ -31,7 +31,6 @@ import com.hippo.ehviewer.client.data.GalleryCommentList;
 import com.hippo.ehviewer.client.data.GalleryDetail;
 import com.hippo.ehviewer.client.data.GalleryInfo;
 import com.hippo.ehviewer.client.data.PreviewSet;
-import com.hippo.ehviewer.client.exception.CancelledException;
 import com.hippo.ehviewer.client.exception.EhException;
 import com.hippo.ehviewer.client.exception.ParseException;
 import com.hippo.ehviewer.client.parser.ArchiveParser;
@@ -64,6 +63,7 @@ import org.jsoup.select.Elements;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CancellationException;
 
 import okhttp3.Call;
 import okhttp3.FormBody;
@@ -94,7 +94,7 @@ public class EhEngine {
     private static void doThrowException(Call call, int code, @Nullable Headers headers,
                                          @Nullable String body, Throwable e) throws Throwable {
         if (call.isCanceled()) {
-            throw new CancelledException();
+            throw new CancellationException("Call cancelled!");
         }
 
         // Check sad panda

app/src/main/java/com/hippo/ehviewer/client/exception/CancelledException.java

@@ -1,24 +0,0 @@
-/*
- * Copyright 2016 Hippo Seven
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.hippo.ehviewer.client.exception;
-
-public class CancelledException extends Exception {
-
-    public CancelledException() {
-        super("CANCELED");
-    }
-}