1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package android.databinding.tool.writer
18
19 import android.databinding.tool.CallbackWrapper
20
CallbackWrappernull21 fun CallbackWrapper.allArgsWithTypes() =
22 "int ${CallbackWrapper.SOURCE_ID} ${method.parameterTypes.withIndex().map { ", ${it.value.toJavaCode()} ${CallbackWrapper.ARG_PREFIX}${it.index}" }.joinToString("")}"
23
argsWithTypesnull24 fun CallbackWrapper.argsWithTypes() =
25 method.parameterTypes.withIndex().map { "${it.value.toJavaCode()} ${CallbackWrapper.ARG_PREFIX}${it.index}" }.joinToString(", ")
26
argsnull27 fun CallbackWrapper.args() =
28 method.parameterTypes.withIndex().map { "${CallbackWrapper.ARG_PREFIX}${it.index}" }.joinToString(", ")
29
allArgsnull30 fun CallbackWrapper.allArgs() =
31 "mSourceId ${method.parameterTypes.withIndex().map { ", ${CallbackWrapper.ARG_PREFIX}${it.index}" }.joinToString("")}"
32
33 /**
34 * For any listener type we see, we create a class that can wrap around it. This wrapper has an
35 * interface which is implemented by the ViewDataBinding.
36 */
37 public class CallbackWrapperWriter(val wrapper: CallbackWrapper) {
38
<lambda>null39 public fun write() = kcode("") {
40 with(wrapper) {
41 @Suppress("RemoveCurlyBracesFromTemplate")
42 app("package ${`package`};")
43 val extendsImplements = if (klass.isInterface) {
44 "implements"
45 } else {
46 "extends"
47 }
48 block("public final class $className $extendsImplements ${klass.canonicalName}") {
49 // declare the actual listener interface
50 nl("final $listenerInterfaceName mListener;")
51 nl("final int mSourceId;")
52 block("public $className($listenerInterfaceName listener, int sourceId)") {
53 nl("mListener = listener;")
54 nl("mSourceId = sourceId;")
55 }
56 nl("")
57 nl("@Override")
58 block("public ${method.returnType.canonicalName} ${method.name}(${wrapper.argsWithTypes()})") {
59 val evaluate = "mListener.$listenerMethodName(${wrapper.allArgs()});"
60 if (method.returnType.isVoid) {
61 nl("$evaluate")
62 } else {
63 nl("return $evaluate")
64 }
65 }
66 nl("")
67 block("public interface $listenerInterfaceName") {
68 nl("${method.returnType} $listenerMethodName(${wrapper.allArgsWithTypes()});")
69 }
70 }
71 }
72 }.generate()
73 }