frontend.android renamed to android-compiler-plugin

2014-09-23 18:11:03 +04:00
parent 35028227a0
commit 565ce5a781
19 changed files with 35 additions and 17 deletions
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="plugin-api" exported="" />
+    <orderEntry type="module" module-name="frontend" />
+    <orderEntry type="library" name="kotlin-runtime" level="project" />
+    <orderEntry type="module" module-name="cli" />
+  </component>
+</module>
+
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android;
+
+import com.intellij.openapi.util.Key;
+
+public class AndroidConst {
+    public static final Key<String> ANDROID_USER_PACKAGE = Key.create("ANDROID_USER_PACKAGE");
+    public static final String SYNTHETIC_FILENAME = "ANDROIDXML.kt";
+}
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import com.intellij.psi.PsiFile
+import com.intellij.psi.PsiElement
+import com.intellij.openapi.project.Project
+
+abstract class AndroidResourceManager(protected val project: Project, protected val searchPath: String?) {
+    private val idDeclarationPrefix = "@+id/"
+    private val idUsagePrefix = "@id/"
+    public val androidNamespace: String = "android"
+    public val idAttributeNoNamespace: String = "id"
+    public val idAttribute: String = androidNamespace + ":" + idAttributeNoNamespace
+    public val classAttributeNoNamespace: String = "class"
+    public val classAttribute: String = androidNamespace + ":" + classAttributeNoNamespace
+
+    abstract fun getLayoutXmlFiles(): Collection<PsiFile>
+    abstract fun idToXmlAttribute(id: String): PsiElement?
+    public fun nameToIdDeclaration(name: String): String = idDeclarationPrefix + name
+    public fun nameToIdUsage(name: String): String = idUsagePrefix + name
+    public fun idToName(id: String?): String {
+        return if (isResourceIdDeclaration(id)) id!!.replace(idDeclarationPrefix, "")
+        else if (isResourceIdUsage(id)) id!!.replace(idUsagePrefix, "")
+        else throw WrongIdFormat(id)
+    }
+    public fun isResourceIdDeclaration(str: String?): Boolean = str?.startsWith(idDeclarationPrefix) ?: false
+    public fun isResourceIdUsage(str: String?): Boolean = str?.startsWith(idUsagePrefix) ?: false
+    public fun isResourceDeclarationOrUsage(id: String?): Boolean = isResourceIdDeclaration(id) || isResourceIdUsage(id)
+
+    abstract fun readManifest(): AndroidManifest
+
+    inner class NoUIXMLsFound : Exception("No android UI xmls found in $searchPath")
+    inner class WrongIdFormat(id: String?) : Exception("Id \"$id\" has wrong format")
+
+}
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiFile
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFileManager
+import com.intellij.psi.PsiManager
+import java.util.ArrayList
+import com.intellij.openapi.vfs.VirtualFile
+
+abstract class AndroidResourceManagerBase(project: Project, searchPath: String?) : AndroidResourceManager(project, searchPath) {
+    override fun getLayoutXmlFiles(): Collection<PsiFile> {
+        val fileManager = VirtualFileManager.getInstance()
+        val watchDir = fileManager.findFileByUrl("file://" + searchPath)
+        val psiManager = PsiManager.getInstance(project)
+        val files = watchDir?.getChildren()?.toArrayList()?.map { psiManager.findFile(it) }?.mapNotNull { it } ?: ArrayList(0)
+        return files.sortBy({it.getName()})
+    }
+
+    protected fun vritualFileToPsi(vf: VirtualFile): PsiFile? {
+        val psiManager = PsiManager.getInstance(project)
+        return psiManager.findFile(vf)
+
+    }
+
+    override fun idToXmlAttribute(id: String): PsiElement? {
+        return null
+    }
+}
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import java.util.ArrayList
+import java.util.HashMap
+import java.util.concurrent.ConcurrentLinkedQueue
+import java.io.File
+import javax.xml.parsers.SAXParserFactory
+import java.io.File
+import java.io.FileInputStream
+import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.psi.JetPsiFactory
+import org.jetbrains.kotlin.psi.JetFile
+import javax.xml.parsers.SAXParser
+import java.util.HashMap
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.VirtualFileManager
+import com.intellij.openapi.vfs.VirtualFileAdapter
+import com.intellij.openapi.vfs.VirtualFileEvent
+import com.intellij.openapi.project.Project
+import java.util.concurrent.ConcurrentLinkedQueue
+import com.intellij.openapi.util.Key
+import com.intellij.testFramework.LightVirtualFile
+import com.intellij.psi.PsiManager
+import java.io.FileInputStream
+import org.xml.sax.helpers.DefaultHandler
+import org.xml.sax.Attributes
+import com.intellij.psi.PsiFileFactory
+import com.intellij.psi.util.PsiModificationTracker
+import com.intellij.psi.impl.PsiModificationTrackerImpl
+import java.util.Queue
+import com.intellij.psi.PsiFile
+import com.intellij.openapi.diagnostic.Logger
+import org.jetbrains.jet.lang.resolve.android.AndroidConst.*
+
+public abstract class AndroidUIXmlProcessor(protected val project: Project) {
+
+    public class NoAndroidManifestFound : Exception("No android manifest file found in project root")
+
+    private enum class CacheAction { HIT; MISS }
+
+    private val androidImports = arrayListOf("android.app.Activity",
+                                     "android.view.View",
+                                     "android.widget.*")
+
+    protected abstract val searchPath: String?
+    protected abstract val androidAppPackage: String
+
+    private val fileCache = HashMap<PsiFile, String>()
+    var lastCachedPsi: JetFile? = null
+        private set
+    protected val fileModificationTime: HashMap<PsiFile, Long> = HashMap()
+
+    protected val filesToProcess: Queue<PsiFile> = ConcurrentLinkedQueue()
+
+    public abstract val resourceManager: AndroidResourceManager
+
+    protected val LOG: Logger = Logger.getInstance(this.javaClass)
+
+    public fun parseToString(): String? {
+        val cacheState = doParse()
+        if (cacheState == null) return null
+        return renderString()
+    }
+
+
+    public fun parseToPsi(project: Project): JetFile? {
+        val cacheState = doParse()
+        if (cacheState == null) return null
+        return if (cacheState == CacheAction.MISS || lastCachedPsi == null) {
+            try {
+                val vf = LightVirtualFile(SYNTHETIC_FILENAME, renderString())
+                val psiFile = PsiManager.getInstance(project).findFile(vf) as JetFile
+                psiFile.putUserData(ANDROID_USER_PACKAGE, androidAppPackage)
+                lastCachedPsi = psiFile
+                psiFile
+            }
+            catch (e: Exception) {
+                invalidateCaches()
+                null
+            }
+        }
+        else lastCachedPsi
+    }
+
+    private fun writeImports(kw: KotlinStringWriter): KotlinWriter {
+        kw.writePackage(androidAppPackage)
+        for (elem in androidImports)
+            kw.writeImport(elem)
+        kw.writeEmptyLine()
+        return kw
+    }
+
+    private fun parseSingleFileWithCache(file: PsiFile): Pair<String, CacheAction> {
+        val lastRecorded = fileModificationTime[file] ?: -1
+        if (file.getModificationStamp() > lastRecorded)
+            return Pair(parseSingleFile(file), CacheAction.MISS)
+        else
+            return Pair(fileCache[file]!!, CacheAction.HIT)
+    }
+
+    private fun parseSingleFile(file: PsiFile): String {
+        val res = parseSingleFileImpl(file)
+        fileModificationTime[file] = file.getModificationStamp()
+        fileCache[file] = res
+        return res
+    }
+
+    protected abstract fun parseSingleFileImpl(file: PsiFile): String
+
+    private fun doParse(): CacheAction? {
+        if (searchPath == null || searchPath == "") return null
+        populateQueue()
+        var overallCacheMiss = false
+        var file = filesToProcess.poll()
+        while (file != null) {
+            val res = parseSingleFileWithCache(file!!)
+            overallCacheMiss = overallCacheMiss or (res.second == CacheAction.MISS)
+            file = filesToProcess.poll()
+        }
+        return if (overallCacheMiss) CacheAction.MISS else CacheAction.HIT
+    }
+
+    private fun renderString(): String {
+        val buffer = writeImports(KotlinStringWriter()).output()
+        for (buf in fileCache.entrySet().sortBy({it.key.getName()}))
+            buffer.append(buf.value)
+        return buffer.toString()
+    }
+
+    private fun invalidateCaches() {
+        fileCache.clear()
+        fileModificationTime.clear()
+        lastCachedPsi = null
+    }
+
+    protected fun populateQueue() {
+        filesToProcess.addAll(resourceManager.getLayoutXmlFiles())
+    }
+
+
+    protected fun produceKotlinProperties(kw: KotlinStringWriter, ids: Collection<AndroidWidget>): StringBuffer {
+        for (id in ids) {
+            val body = arrayListOf("return findViewById(0) as ${id.className}")
+            kw.writeImmutableExtensionProperty(receiver = "Activity",
+                                               name = id.id,
+                                               retType = id.className,
+                                               getterBody = body)
+        }
+        return kw.output()
+    }
+}
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import com.intellij.psi.PsiFile
+import com.intellij.psi.PsiElement
+import com.intellij.openapi.project.Project
+import org.jetbrains.jet.lang.psi.JetFile
+import com.intellij.openapi.components.ServiceManager
+import java.util.ArrayList
+import com.intellij.psi.PsiField
+import com.intellij.psi.PsiClass
+
+trait AndroidResource
+
+class AndroidID(val rawID: String) : AndroidResource {
+
+    override fun equals(other: Any?): Boolean {
+        return other is AndroidID && this.rawID == other.rawID
+    }
+    override fun hashCode(): Int {
+        return rawID.hashCode()
+    }
+    override fun toString(): String {
+        return rawID
+    }
+}
+
+class AndroidWidget(val id: String, val className: String) : AndroidResource
+
+class AndroidManifest(val _package: String) : AndroidResource
+
+fun isAndroidSyntheticFile(f: PsiFile?): Boolean {
+    return f?.getUserData(org.jetbrains.jet.lang.resolve.android.AndroidConst.ANDROID_USER_PACKAGE) != null
+}
+
+public fun isAndroidSyntheticElement(element: PsiElement?): Boolean {
+    return isAndroidSyntheticFile(element?.getContainingFile())
+}
+
+public fun searchAndAddAndroidDeclarations(project: Project, originalFiles: Collection<JetFile>): Collection<JetFile> {
+    val parser = ServiceManager.getService<AndroidUIXmlProcessor>(project, javaClass<AndroidUIXmlProcessor>())
+    val file = parser?.parseToPsi(project)
+    val files = ArrayList(originalFiles)
+    if (file != null) files.add(file)
+    return files
+}
+
+public fun isRClassField(element: PsiElement): Boolean {
+    return if (element is PsiField) {
+        val outerClass = element.getParent()?.getParent()
+        if (outerClass !is PsiClass) return false
+        val processor = ServiceManager.getService<AndroidUIXmlProcessor>(element.getProject(), javaClass<AndroidUIXmlProcessor>())
+        val packageName = processor?.resourceManager?.readManifest()?._package
+        if ((outerClass as PsiClass).getQualifiedName()?.startsWith(packageName ?: "") ?: false)
+        true else false
+    }
+    else false
+}
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import org.xml.sax.helpers.DefaultHandler
+import org.xml.sax.Attributes
+import java.util.HashMap
+
+class AndroidXmlHandler(private val resourceManager: AndroidResourceManager, private val elementCallback: (String, String) -> Unit) : DefaultHandler() {
+
+    override fun startDocument() {
+        super<DefaultHandler>.startDocument()
+    }
+
+    override fun endDocument() {
+        super<DefaultHandler>.endDocument()
+    }
+
+    override fun startElement(uri: String, localName: String, qName: String, attributes: Attributes) {
+        val attributesMap = attributes.toMap()
+        val idAttr = attributesMap[resourceManager.idAttributeNoNamespace]
+        val classNameAttr = attributesMap[resourceManager.classAttributeNoNamespace] ?: localName
+        if (resourceManager.isResourceDeclarationOrUsage(idAttr)) elementCallback(resourceManager.idToName(idAttr), classNameAttr)
+    }
+
+    override fun endElement(uri: String?, localName: String, qName: String) {
+
+    }
+
+}
+
+public fun Attributes.toMap(): HashMap<String, String> {
+    val res = HashMap<String, String>()
+    for (index in 0..getLength() - 1) {
+        val attrName = getLocalName(index)!!
+        val attrVal = getValue(index)!!
+        res[attrName] = attrVal
+    }
+    return res
+}
+
+
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import com.intellij.openapi.project.Project
+import java.io.File
+import java.io.FileInputStream
+import org.xml.sax.helpers.DefaultHandler
+import org.xml.sax.Attributes
+import javax.xml.parsers.SAXParser
+import javax.xml.parsers.SAXParserFactory
+
+public class CliAndroidResourceManager(project: Project, searchPath: String?, private val manifestPath: String?) : org.jetbrains.jet.lang.resolve.android.AndroidResourceManagerBase(project, searchPath) {
+
+    val saxParser: SAXParser = initSAX()
+
+    protected fun initSAX(): SAXParser {
+        val saxFactory = SAXParserFactory.newInstance()
+        saxFactory?.setNamespaceAware(true)
+        return saxFactory!!.newSAXParser()
+    }
+    override fun readManifest(): org.jetbrains.jet.lang.resolve.android.AndroidManifest {
+        try {
+            val manifestXml = File(manifestPath!!)
+            var _package: String = ""
+            try {
+                saxParser.parse(FileInputStream(manifestXml), object : DefaultHandler() {
+                    override fun startElement(uri: String, localName: String, qName: String, attributes: Attributes) {
+                        if (localName == "manifest")
+                            _package = attributes.toMap()["package"] ?: ""
+                    }
+                })
+            }
+            catch (e: Exception) {
+                throw e
+            }
+            return org.jetbrains.jet.lang.resolve.android.AndroidManifest(_package)
+        }
+        catch (e: Exception) {
+            throw org.jetbrains.jet.lang.resolve.android.AndroidUIXmlProcessor.NoAndroidManifestFound()
+        }
+    }
+}
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import java.util.ArrayList
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiFile
+
+public class CliAndroidUIXmlProcessor(project: Project, override val searchPath: String?, val manifestPath: String?) : org.jetbrains.jet.lang.resolve.android.AndroidUIXmlProcessor(project) {
+
+    override var androidAppPackage: String = ""
+        get() = resourceManager.readManifest()._package
+
+    override val resourceManager = org.jetbrains.jet.lang.resolve.android.CliAndroidResourceManager(project, searchPath, manifestPath)
+
+    override fun parseSingleFileImpl(file: PsiFile): String {
+        val ids: MutableCollection<AndroidWidget> = ArrayList()
+        val handler = org.jetbrains.jet.lang.resolve.android.AndroidXmlHandler(resourceManager, { id, wClass -> ids.add(AndroidWidget(id, wClass)) })
+        try {
+            resourceManager.saxParser.parse(file.getVirtualFile()?.getInputStream()!!, handler)
+            return produceKotlinProperties(KotlinStringWriter(), ids).toString()
+        }
+        catch (e: Throwable) {
+            LOG.error(e)
+            return ""
+        }
+    }
+}
+
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+import java.util.ArrayList
+
+
+open class Context(val buffer: StringBuffer = StringBuffer(), private var indentDepth: Int = 0) {
+    open class InvalidIndent(num: Int) : RuntimeException("Indentation level < 0: $num")
+
+    val indentUnit = "    "
+    protected var currentIndent: String = indentUnit.repeat(indentDepth)
+    private val children = ArrayList<Context>()
+
+    public fun incIndent() {
+        indentDepth++
+        currentIndent += indentUnit
+    }
+
+    public fun decIndent() {
+        indentDepth--
+        if (indentDepth < 0)
+            throw InvalidIndent(indentDepth)
+        currentIndent = currentIndent.substring(0, currentIndent.length - indentUnit.length)
+    }
+
+    public open fun write(what: String) {
+        writeNoIndent(currentIndent)
+        writeNoIndent(what)
+    }
+
+    public fun writeNoIndent(what: String) {
+        buffer.append(what)
+    }
+
+    public fun writeln(what: String) {
+        write(what)
+        newLine()
+    }
+
+    public fun newLine() {
+        writeNoIndent("\n")
+    }
+
+
+    public fun trim(num: Int) {
+        buffer.delete(buffer.length - num, buffer.length)
+    }
+
+    public fun fork(newBuffer: StringBuffer = StringBuffer(),
+                    newIndentDepth: Int = indentDepth): Context {
+        val child = Context(newBuffer, newIndentDepth)
+        children.add(child)
+        return child
+    }
+
+    public fun adopt<T : Context>(c: T, inheritIndent: Boolean = true): T {
+        children.add(c)
+        if (inheritIndent) c.currentIndent = currentIndent
+        return c
+    }
+
+    public fun absorbChildren(noIndent: Boolean = true) {
+        for (child in children) {
+            child.absorbChildren()
+            if (noIndent)
+                writeNoIndent(child.toString())
+            else
+                write(child.toString())
+        }
+        children.clear()
+    }
+
+    public override fun toString(): String {
+        return buffer.toString()
+    }
+}
+
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.lang.resolve.android
+
+trait KotlinWriter {
+    fun output(): StringBuffer
+}
+
+class KotlinStringWriter : KotlinWriter {
+
+    private val ctx = org.jetbrains.jet.lang.resolve.android.Context()
+    private val imports = ctx.fork()
+    private val body = ctx.fork()
+
+    fun writeFunction(name: String,
+                      args: Collection<String>?,
+                      retType: String,
+                      stmts: Collection<String>) {
+        val returnTerm = if (retType == "" || retType == "Unit") "" else ": $retType"
+        val argStr = if (args != null) args.join(", ") else ""
+        body.writeln("fun $name($argStr)$returnTerm {")
+        body.incIndent()
+        for (stmt in stmts)
+            body.writeln(stmt)
+        body.decIndent()
+        body.writeln("}")
+    }
+
+    fun writeExtensionFunction(receiver: String,
+                               name: String,
+                               args: Collection<String>?,
+                               retType: String,
+                               body: Collection<String>) {
+        writeFunction("$receiver.$name", args, retType, body)
+    }
+
+    fun writeImmutableProperty(name: String,
+                               retType: String,
+                               getterBody: Collection<String>) {
+        body.writeln("val $name: $retType")
+        body.incIndent()
+        body.write("get() ")
+        if (getterBody.size > 1) {
+            body.writeNoIndent("{\n")
+            body.incIndent()
+            for (stmt in getterBody) {
+                body.writeln(stmt)
+            }
+            body.decIndent()
+            body.writeln("}")
+        }
+        else {
+            body.writeNoIndent("=")
+            body.writeNoIndent(getterBody.join("").replace("return", ""))
+            body.newLine()
+        }
+        body.decIndent()
+        body.newLine()
+    }
+
+    fun writeImmutableExtensionProperty(receiver: String,
+                                        name: String,
+                                        retType: String,
+                                        getterBody: Collection<String>) {
+        writeImmutableProperty("$receiver.$name", retType, getterBody)
+    }
+
+    fun writeImport(what: String) {
+        imports.writeln("import $what")
+    }
+
+    fun writePackage(_package: String) {
+        ctx.writeln("package $_package\n")
+    }
+
+    fun writeEmptyLine() {
+        body.newLine()
+    }
+
+    override fun output(): StringBuffer {
+        ctx.absorbChildren()
+        return ctx.buffer
+    }
+}
+