Begin implementation of google chrome debugger backend

pom.xml

@@ -65,8 +65,10 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <html4j.version>0.7.5</html4j.version>
     <sonatypeOssDistMgmtSnapshotsUrl>https://oss.sonatype.org/content/repositories/snapshots/</sonatypeOssDistMgmtSnapshotsUrl>
+    <html4j.version>0.7.5</html4j.version>
+    <jetty.version>9.2.1.v20140609</jetty.version>
+    <slf4j.version>1.7.7</slf4j.version>
   </properties>
 
   <modules>
@@ -79,6 +81,7 @@
     <module>teavm-samples</module>
     <module>teavm-platform</module>
     <module>teavm-cli</module>
+    <module>teavm-chrome-rdp</module>
   </modules>
 
   <dependencyManagement>
@@ -134,6 +137,26 @@
         <artifactId>maven-core</artifactId>
         <version>3.0</version>
       </dependency>
+      <dependency>
+        <groupId>javax.websocket</groupId>
+        <artifactId>javax.websocket-api</artifactId>
+        <version>1.0</version>
+      </dependency>
+      <dependency>
+        <groupId>org.eclipse.jetty</groupId>
+        <artifactId>jetty-server</artifactId>
+        <version>${jetty.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.eclipse.jetty.websocket</groupId>
+        <artifactId>javax-websocket-server-impl</artifactId>
+        <version>${jetty.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.slf4j</groupId>
+        <artifactId>slf4j-api</artifactId>
+        <version>${slf4j.version}</version>
+      </dependency>
     </dependencies>
   </dependencyManagement>
 

teavm-chrome-rdp/.gitignore

@@ -0,0 +1,4 @@
+/target
+/.settings
+/.classpath
+/.project

teavm-chrome-rdp/pom.xml

@@ -0,0 +1,88 @@
+<!--
+    Copyright 2014 Alexey Andreev.
+
+    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.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.teavm</groupId>
+    <artifactId>teavm</artifactId>
+    <version>0.2-SNAPSHOT</version>
+  </parent>
+  <artifactId>teavm-chrome-rdp</artifactId>
+
+  <name>TeaVM debugging backend for Google Chrome RDP</name>
+  <description>TeaVM debugging backend for Google Chrome RDP</description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-server</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty.websocket</groupId>
+      <artifactId>javax-websocket-server-impl</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.teavm</groupId>
+      <artifactId>teavm-core</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>javax.websocket</groupId>
+      <artifactId>javax.websocket-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-server</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty.websocket</groupId>
+      <artifactId>javax-websocket-server-impl</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.codehaus.jackson</groupId>
+      <artifactId>jackson-core-asl</artifactId>
+      <version>1.9.13</version>
+    </dependency>
+    <dependency>
+      <groupId>org.codehaus.jackson</groupId>
+      <artifactId>jackson-mapper-asl</artifactId>
+      <version>1.9.13</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/ChromeRDPDebugger.java

@@ -0,0 +1,202 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.websocket.OnMessage;
+import javax.websocket.OnOpen;
+import javax.websocket.Session;
+import javax.websocket.server.ServerEndpoint;
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.teavm.chromerpd.data.CallFrameDTO;
+import org.teavm.chromerpd.data.LocationDTO;
+import org.teavm.chromerpd.data.Message;
+import org.teavm.chromerpd.messages.ContinueToLocationCommand;
+import org.teavm.chromerpd.messages.ScriptParsedNotification;
+import org.teavm.chromerpd.messages.SuspendedNotification;
+import org.teavm.debugging.*;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+@ServerEndpoint("/")
+public class ChromeRDPDebugger implements JavaScriptDebugger {
+    private List<JavaScriptDebuggerListener> listeners = new ArrayList<>();
+    private Session session;
+    private RDPCallFrame[] callStack = new RDPCallFrame[0];
+    private Map<String, String> scripts = new HashMap<>();
+    private Map<String, String> scriptIds = new HashMap<>();
+    private boolean suspended;
+    private ObjectMapper mapper = new ObjectMapper();
+
+    @OnOpen
+    public void open(Session session) {
+        this.session = session;
+    }
+
+    @OnMessage
+    public void receive(String messageText) throws IOException {
+        Message message = mapper.reader(Message.class).readValue(messageText);
+        switch (message.getMethod()) {
+            case "Debugger.paused":
+                firePaused(parseJson(SuspendedNotification.class, message.getParams()));
+                break;
+            case "Debugger.resumed":
+                fireResumed();
+                break;
+            case "Debugger.scriptParsed":
+                scriptParsed(parseJson(ScriptParsedNotification.class, message.getParams()));
+                break;
+        }
+    }
+
+    private <T> T parseJson(Class<T> type, JsonNode node) throws IOException {
+        return mapper.reader(type).readValue(node);
+    }
+
+    private void firePaused(SuspendedNotification params) {
+        suspended = true;
+        CallFrameDTO[] callFrameDTOs = params.getCallFrames();
+        RDPCallFrame[] callFrames = new RDPCallFrame[callFrameDTOs.length];
+        for (int i = 0; i < callFrames.length; ++i) {
+            callFrames[i] = map(callFrameDTOs[i]);
+        }
+        for (JavaScriptDebuggerListener listener : listeners) {
+            listener.paused();
+        }
+    }
+
+    RDPCallFrame map(CallFrameDTO dto) {
+        return new RDPCallFrame(dto.getCallFrameId(), map(dto.getLocation()));
+    }
+
+    JavaScriptLocation map(LocationDTO dto) {
+        return new JavaScriptLocation(scripts.get(dto.getScriptId()), dto.getLineNumber(), dto.getColumnNumber());
+    }
+
+    private void fireResumed() {
+        suspended = false;
+        for (JavaScriptDebuggerListener listener : listeners) {
+            listener.resumed();
+        }
+    }
+
+    private void scriptParsed(ScriptParsedNotification params) {
+        if (scripts.containsKey(params.getScriptId())) {
+            return;
+        }
+        scripts.put(params.getScriptId(), params.getUrl());
+        scriptIds.put(params.getUrl(), params.getScriptId());
+        for (JavaScriptDebuggerListener listener : listeners) {
+            listener.scriptAdded(params.getUrl());
+        }
+    }
+
+    @Override
+    public void addListener(JavaScriptDebuggerListener listener) {
+        listeners.add(listener);
+    }
+
+    @Override
+    public void removeListener(JavaScriptDebuggerListener listener) {
+        listeners.remove(listener);
+    }
+
+    private void sendMessage(Message message) {
+        try {
+            String messageText = mapper.writer().writeValueAsString(message);
+            session.getAsyncRemote().sendText(messageText);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public void suspend() {
+        Message message = new Message();
+        message.setMethod("Debugger.pause");
+        sendMessage(message);
+    }
+
+    @Override
+    public void resume() {
+        Message message = new Message();
+        message.setMethod("Debugger.resume");
+        sendMessage(message);
+    }
+
+    @Override
+    public void stepInto() {
+        Message message = new Message();
+        message.setMethod("Debugger.stepInto");
+        sendMessage(message);
+    }
+
+    @Override
+    public void stepOut() {
+        Message message = new Message();
+        message.setMethod("Debugger.stepOut");
+        sendMessage(message);
+    }
+
+    @Override
+    public void stepOver() {
+        Message message = new Message();
+        message.setMethod("Debugger.stepOver");
+        sendMessage(message);
+    }
+
+    @Override
+    public void continueToLocation(JavaScriptLocation location) {
+        Message message = new Message();
+        message.setMethod("Debugger.continueToLocation");
+        ContinueToLocationCommand params = new ContinueToLocationCommand();
+        LocationDTO locationDTO = new LocationDTO();
+        locationDTO.setScriptId(scriptIds.get(location.getScript()));
+        locationDTO.setLineNumber(location.getLine());
+        locationDTO.setColumnNumber(location.getColumn());
+        params.setLocation(locationDTO);
+        message.setParams(mapper.valueToTree(params));
+        sendMessage(message);
+    }
+
+    @Override
+    public boolean isSuspended() {
+        return suspended;
+    }
+
+    @Override
+    public JavaScriptCallFrame[] getCallStack() {
+        return callStack;
+    }
+
+    @Override
+    public JavaScriptBreakpoint getCurrentBreakpoint() {
+        return null;
+    }
+
+    @Override
+    public JavaScriptBreakpoint createBreakpoint(JavaScriptLocation location) {
+        return null;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/RDPCallFrame.java

@@ -0,0 +1,42 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd;
+
+import org.teavm.debugging.JavaScriptCallFrame;
+import org.teavm.debugging.JavaScriptLocation;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class RDPCallFrame implements JavaScriptCallFrame {
+    private String chromeId;
+    private JavaScriptLocation location;
+
+    public RDPCallFrame(String chromeId, JavaScriptLocation location) {
+        this.chromeId = chromeId;
+        this.location = location;
+    }
+
+    public String getChromeId() {
+        return chromeId;
+    }
+
+    @Override
+    public JavaScriptLocation getLocation() {
+        return location;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/data/CallFrameDTO.java

@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.data;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class CallFrameDTO {
+    private String callFrameId;
+    private LocationDTO location;
+
+    public String getCallFrameId() {
+        return callFrameId;
+    }
+
+    public void setCallFrameId(String callFrameId) {
+        this.callFrameId = callFrameId;
+    }
+
+    public LocationDTO getLocation() {
+        return location;
+    }
+
+    public void setLocation(LocationDTO location) {
+        this.location = location;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/data/LocationDTO.java

@@ -0,0 +1,50 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.data;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class LocationDTO {
+    private int columnNumber;
+    private int lineNumber;
+    private String scriptId;
+
+    public int getColumnNumber() {
+        return columnNumber;
+    }
+
+    public void setColumnNumber(int columnNumber) {
+        this.columnNumber = columnNumber;
+    }
+
+    public int getLineNumber() {
+        return lineNumber;
+    }
+
+    public void setLineNumber(int lineNumber) {
+        this.lineNumber = lineNumber;
+    }
+
+    public String getScriptId() {
+        return scriptId;
+    }
+
+    public void setScriptId(String scriptId) {
+        this.scriptId = scriptId;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/data/Message.java

@@ -0,0 +1,43 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.data;
+
+import org.codehaus.jackson.JsonNode;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class Message {
+    private String method;
+    private JsonNode params;
+
+    public String getMethod() {
+        return method;
+    }
+
+    public void setMethod(String method) {
+        this.method = method;
+    }
+
+    public JsonNode getParams() {
+        return params;
+    }
+
+    public void setParams(JsonNode params) {
+        this.params = params;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/messages/ContinueToLocationCommand.java

@@ -0,0 +1,34 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.messages;
+
+import org.teavm.chromerpd.data.LocationDTO;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class ContinueToLocationCommand {
+    private LocationDTO location;
+
+    public LocationDTO getLocation() {
+        return location;
+    }
+
+    public void setLocation(LocationDTO location) {
+        this.location = location;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/messages/ScriptParsedNotification.java

@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.messages;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class ScriptParsedNotification {
+    private String scriptId;
+    private String url;
+
+    public String getScriptId() {
+        return scriptId;
+    }
+
+    public void setScriptId(String scriptId) {
+        this.scriptId = scriptId;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+}

teavm-chrome-rdp/src/main/java/org/teavm/chromerpd/messages/SuspendedNotification.java

@@ -0,0 +1,53 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.chromerpd.messages;
+
+import org.codehaus.jackson.JsonNode;
+import org.teavm.chromerpd.data.CallFrameDTO;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class SuspendedNotification {
+    private CallFrameDTO[] callFrames;
+    private String reason;
+    private JsonNode data;
+
+    public CallFrameDTO[] getCallFrames() {
+        return callFrames;
+    }
+
+    public void setCallFrames(CallFrameDTO[] callFrames) {
+        this.callFrames = callFrames;
+    }
+
+    public String getReason() {
+        return reason;
+    }
+
+    public void setReason(String reason) {
+        this.reason = reason;
+    }
+
+    public JsonNode getData() {
+        return data;
+    }
+
+    public void setData(JsonNode data) {
+        this.data = data;
+    }
+}

teavm-core/src/main/java/org/teavm/debugging/DebugInformation.java

@@ -41,6 +41,10 @@ public class DebugInformation {
     Mapping methodMapping;
     Mapping lineMapping;
 
+    public String[] getCoveredSourceFiles() {
+        return fileNames.clone();
+    }
+
     public Collection<GeneratedLocation> getGeneratedLocations(String fileName, int line) {
         Integer fileIndex = fileNameMap.get(fileName);
         if (fileIndex == null) {
@@ -90,6 +94,10 @@ public class DebugInformation {
         return new MethodReference(className, MethodDescriptor.parse(method));
     }
 
+    public MethodReference getMethodAt(int line, int column) {
+        return getMethodAt(new GeneratedLocation(line, column));
+    }
+
     private <T> T componentByKey(Mapping mapping, T[] values, GeneratedLocation location) {
         int keyIndex = indexByKey(mapping, location);
         int valueIndex = keyIndex >= 0 ? mapping.values[keyIndex] : -1;
@@ -106,7 +114,7 @@ public class DebugInformation {
         writer.write(this);
     }
 
-    public DebugInformation read(InputStream input) throws IOException {
+    public static DebugInformation read(InputStream input) throws IOException {
         DebugInformationReader reader = new DebugInformationReader(input);
         return reader.read();
     }

teavm-core/src/main/java/org/teavm/debugging/DebugInformationProvider.java

@@ -0,0 +1,24 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.debugging;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public interface DebugInformationProvider {
+    DebugInformation getDebugInformation(String script);
+}

teavm-core/src/main/java/org/teavm/debugging/Debugger.java

@@ -27,14 +27,17 @@ import org.teavm.model.MethodReference;
 public class Debugger {
     private List<DebuggerListener> listeners = new ArrayList<>();
     private JavaScriptDebugger javaScriptDebugger;
-    private DebugInformation debugInformation;
+    private DebugInformationProvider debugInformationProvider;
     private List<JavaScriptBreakpoint> temporaryJsBreakpoints = new ArrayList<>();
+    private Map<String, DebugInformation> debugInformationMap = new HashMap<>();
+    private Map<String, List<DebugInformation>> debugInformationFileMap = new HashMap<>();
+    private Map<DebugInformation, String> scriptMap = new HashMap<>();
     Map<String, Breakpoint> breakpointMap = new HashMap<>();
     private CallFrame[] callStack;
 
-    public Debugger(JavaScriptDebugger javaScriptDebugger, DebugInformation debugInformation) {
+    public Debugger(JavaScriptDebugger javaScriptDebugger, DebugInformationProvider debugInformationProvider) {
         this.javaScriptDebugger = javaScriptDebugger;
-        this.debugInformation = debugInformation;
+        this.debugInformationProvider = debugInformationProvider;
         javaScriptDebugger.addListener(javaScriptListener);
     }
 
@@ -65,7 +68,6 @@ public class Debugger {
         if (!javaScriptDebugger.isSuspended()) {
             return;
         }
-        // TODO: lookup all locations that are "out of" the current location and create temporary breakpoints
         javaScriptDebugger.stepOut();
     }
 
@@ -74,18 +76,26 @@ public class Debugger {
             return;
         }
         javaScriptDebugger.stepOver();
-        // TODO: lookup all locations that are "after" the current location and create temporary breakpoints
+    }
+
+    private List<DebugInformation> debugInformationBySource(String sourceFile) {
+        List<DebugInformation> list = debugInformationFileMap.get(sourceFile);
+        return list != null ? list : Collections.<DebugInformation>emptyList();
     }
 
     public void continueToLocation(String fileName, int line) {
         if (!javaScriptDebugger.isSuspended()) {
             return;
         }
-        Collection<GeneratedLocation> locations = debugInformation.getGeneratedLocations(fileName, line);
-        for (GeneratedLocation location : locations) {
-            JavaScriptBreakpoint jsBreakpoint = javaScriptDebugger.createBreakpoint(location);
-            if (jsBreakpoint != null) {
-                temporaryJsBreakpoints.add(jsBreakpoint);
+        for (DebugInformation debugInformation : debugInformationBySource(fileName)) {
+            Collection<GeneratedLocation> locations = debugInformation.getGeneratedLocations(fileName, line);
+            for (GeneratedLocation location : locations) {
+                JavaScriptLocation jsLocation = new JavaScriptLocation(scriptMap.get(debugInformation),
+                        location.getLine(), location.getColumn());
+                JavaScriptBreakpoint jsBreakpoint = javaScriptDebugger.createBreakpoint(jsLocation);
+                if (jsBreakpoint != null) {
+                    temporaryJsBreakpoints.add(jsBreakpoint);
+                }
             }
         }
         javaScriptDebugger.resume();
@@ -96,12 +106,16 @@ public class Debugger {
     }
 
     public Breakpoint createBreakpoint(String fileName, int line) {
-        Collection<GeneratedLocation> locations = debugInformation.getGeneratedLocations(fileName, line);
         List<JavaScriptBreakpoint> jsBreakpoints = new ArrayList<>();
-        for (GeneratedLocation location : locations) {
-            JavaScriptBreakpoint jsBreakpoint = javaScriptDebugger.createBreakpoint(location);
-            if (jsBreakpoint != null) {
-                jsBreakpoints.add(jsBreakpoint);
+        for (DebugInformation debugInformation : debugInformationBySource(fileName)) {
+            Collection<GeneratedLocation> locations = debugInformation.getGeneratedLocations(fileName, line);
+            for (GeneratedLocation location : locations) {
+                JavaScriptLocation jsLocation = new JavaScriptLocation(scriptMap.get(debugInformation),
+                        location.getLine(), location.getColumn());
+                JavaScriptBreakpoint jsBreakpoint = javaScriptDebugger.createBreakpoint(jsLocation);
+                if (jsBreakpoint != null) {
+                    jsBreakpoints.add(jsBreakpoint);
+                }
             }
         }
         return !jsBreakpoints.isEmpty() ? new Breakpoint(this, jsBreakpoints, fileName, line) : null;
@@ -117,9 +131,17 @@ public class Debugger {
             List<CallFrame> frames = new ArrayList<>();
             boolean wasEmpty = false;
             for (JavaScriptCallFrame jsFrame : javaScriptDebugger.getCallStack()) {
-                SourceLocation loc = debugInformation.getSourceLocation(jsFrame.getLocation());
+                DebugInformation debugInformation = debugInformationMap.get(jsFrame.getLocation().getScript());
+                SourceLocation loc;
+                if (debugInformation != null) {
+                    loc = debugInformation.getSourceLocation(jsFrame.getLocation().getLine(),
+                            jsFrame.getLocation().getColumn());
+                } else {
+                    loc = null;
+                }
                 boolean empty = loc == null || (loc.getFileName() == null && loc.getLine() < 0);
-                MethodReference method = !empty ? debugInformation.getMethodAt(jsFrame.getLocation()) : null;
+                MethodReference method = !empty ? debugInformation.getMethodAt(jsFrame.getLocation().getLine(),
+                        jsFrame.getLocation().getColumn()) : null;
                 if (!empty || !wasEmpty) {
                     frames.add(new CallFrame(loc, method));
                 }
@@ -130,6 +152,23 @@ public class Debugger {
         return callStack.clone();
     }
 
+    private void addScript(String name) {
+        if (debugInformationMap.containsKey(name)) {
+            return;
+        }
+        DebugInformation debugInfo = debugInformationProvider.getDebugInformation(name);
+        debugInformationMap.put(name, debugInfo);
+        for (String sourceFile : debugInfo.getCoveredSourceFiles()) {
+            List<DebugInformation> list = debugInformationFileMap.get(sourceFile);
+            if (list == null) {
+                list = new ArrayList<>();
+                debugInformationFileMap.put(sourceFile, list);
+            }
+            list.add(debugInfo);
+        }
+        scriptMap.put(debugInfo, name);
+    }
+
     private JavaScriptDebuggerListener javaScriptListener = new JavaScriptDebuggerListener() {
         @Override
         public void resumed() {
@@ -148,5 +187,10 @@ public class Debugger {
                 listener.paused();
             }
         }
+
+        @Override
+        public void scriptAdded(String name) {
+            addScript(name);
+        }
     };
 }

teavm-core/src/main/java/org/teavm/debugging/JavaScriptBreakpoint.java

@@ -28,7 +28,7 @@ public interface JavaScriptBreakpoint {
 
     String getFileName();
 
-    GeneratedLocation getLocation();
+    JavaScriptLocation getLocation();
 
     void destroy();
 }

teavm-core/src/main/java/org/teavm/debugging/JavaScriptCallFrame.java

@@ -20,5 +20,5 @@ package org.teavm.debugging;
  * @author Alexey Andreev
  */
 public interface JavaScriptCallFrame {
-    GeneratedLocation getLocation();
+    JavaScriptLocation getLocation();
 }

teavm-core/src/main/java/org/teavm/debugging/JavaScriptDebugger.java

@@ -34,7 +34,7 @@ public interface JavaScriptDebugger {
 
     void stepOver();
 
-    void continueToLocation(GeneratedLocation location);
+    void continueToLocation(JavaScriptLocation location);
 
     boolean isSuspended();
 
@@ -42,5 +42,5 @@ public interface JavaScriptDebugger {
 
     JavaScriptBreakpoint getCurrentBreakpoint();
 
-    JavaScriptBreakpoint createBreakpoint(GeneratedLocation location);
+    JavaScriptBreakpoint createBreakpoint(JavaScriptLocation location);
 }

teavm-core/src/main/java/org/teavm/debugging/JavaScriptDebuggerListener.java

@@ -23,4 +23,6 @@ public interface JavaScriptDebuggerListener {
     void paused();
 
     void resumed();
+
+    void scriptAdded(String name);
 }

teavm-core/src/main/java/org/teavm/debugging/JavaScriptLocation.java

@@ -0,0 +1,44 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.debugging;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class JavaScriptLocation {
+    private String script;
+    private int line;
+    private int column;
+
+    public JavaScriptLocation(String script, int line, int column) {
+        this.script = script;
+        this.line = line;
+        this.column = column;
+    }
+
+    public String getScript() {
+        return script;
+    }
+
+    public int getLine() {
+        return line;
+    }
+
+    public int getColumn() {
+        return column;
+    }
+}

teavm-core/src/main/java/org/teavm/debugging/URLDebugInformationProvider.java

@@ -0,0 +1,44 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  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.teavm.debugging;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+public class URLDebugInformationProvider implements DebugInformationProvider {
+    private String baseURL;
+
+    public URLDebugInformationProvider(String baseURL) {
+        this.baseURL = baseURL;
+    }
+
+    @Override
+    public DebugInformation getDebugInformation(String script) {
+        try {
+            URL url = new URL(baseURL + script);
+            try (InputStream input = url.openStream()) {
+                return DebugInformation.read(input);
+            }
+        } catch (IOException e) {
+            return null;
+        }
+    }
+}