refactor converter initialization

- push lazyInit() down to IDE and Cli implementations
- no file listeners created in cli implementation anymore
- fix tests

idea/src/org/jetbrains/jet/plugin/android/IDEAndroidUIXmlParser.kt

@@ -2,8 +2,38 @@ package org.jetbrains.jet.plugin.android
 
 import org.jetbrains.jet.lang.resolve.android.AndroidUIXmlParser
 import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFileManager
+import java.util.ArrayList
+import com.intellij.openapi.vfs.VirtualFileAdapter
+import com.intellij.openapi.vfs.VirtualFileEvent
 
 class IDEAndroidUIXmlParser(project: Project): AndroidUIXmlParser() {
     override val searchPath: String? = project.getBasePath() + "/res/layout/"
+
+    override protected fun lazySetup() {
+        if (listenerSetUp) return
+        val fileManager = VirtualFileManager.getInstance()
+        val watchDir = fileManager.findFileByUrl("file://" + searchPath)
+        filesToProcess.addAll(watchDir?.getChildren()?.toArrayList() ?: ArrayList(0))
+        fileManager.addVirtualFileListener(object : VirtualFileAdapter() {
+            override fun contentsChanged(event: VirtualFileEvent) {
+                if (event.getParent() == watchDir)
+                    filesToProcess.add(event.getFile())
+            }
+            override fun fileCreated(event: VirtualFileEvent) {
+                if (event.getParent() == watchDir)
+                    super<VirtualFileAdapter>.fileCreated(event)
+            }
+            override fun fileDeleted(event: VirtualFileEvent) {
+                if (event.getParent() == watchDir) {
+                    // ignore potential synchronisation issues - it doesn't really matter if invalidation and
+                    // file processing will be handled in different passes
+                    invalidateCaches = true
+                    filesToProcess.addAll(watchDir?.getChildren()?.toArrayList() ?: ArrayList(0))
+                }
+            }
+        })
+        listenerSetUp = true
+    }
 }