prepare to implement firefox evaluate

platform/script-debugger/backend/src/org/jetbrains/debugger/BreakpointManager.java

@@ -43,6 +43,15 @@ public interface BreakpointManager {
   @NotNull
   Promise<Void> flush(@NotNull Breakpoint breakpoint);
 
+  /**
+   * Asynchronously enables or disables all breakpoints on remote. 'Enabled' means that
+   * breakpoints behave as normal, 'disabled' means that VM doesn't stop on breakpoints.
+   * It doesn't update individual properties of {@link Breakpoint}s. Method call
+   * with a null value and not null callback simply returns current value.
+   */
+  @NotNull
+  Promise<?> enableBreakpoints(boolean enabled);
+
   interface BreakpointListener extends EventListener {
     void resolved(@NotNull Breakpoint breakpoint);
 

platform/script-debugger/backend/src/org/jetbrains/debugger/BreakpointManagerBase.java

@@ -152,4 +152,10 @@ public abstract class BreakpointManagerBase<T extends BreakpointBase<?>> impleme
   public Promise<Void> flush(@NotNull Breakpoint breakpoint) {
     return ((T)breakpoint).flush(this);
   }
+
+  @NotNull
+  @Override
+  public Promise<?> enableBreakpoints(boolean enabled) {
+    return Promise.reject("Unsupported");
+  }
 }

platform/script-debugger/backend/src/org/jetbrains/debugger/Vm.java

@@ -1,6 +1,7 @@
 package org.jetbrains.debugger;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.concurrency.Promise;
 
 public interface Vm {
@@ -23,23 +24,13 @@ public interface Vm {
   @NotNull
   SuspendContextManager getSuspendContextManager();
 
-  /**
-   * Asynchronously enables or disables all breakpoints on remote. 'Enabled' means that
-   * breakpoints behave as normal, 'disabled' means that VM doesn't stop on breakpoints.
-   * It doesn't update individual properties of {@link Breakpoint}s. Method call
-   * with a null value and not null callback simply returns current value.
-   * @param enabled new value to set or null
-   */
-  @NotNull
-  Promise<?> enableBreakpoints(boolean enabled);
-
   /**
    * Controls whether VM stops on exceptions
    */
   @NotNull
   Promise<?> setBreakOnException(@NotNull ExceptionCatchMode catchMode);
 
-  @NotNull
+  @Nullable("if global evaluate not supported")
   EvaluateContext getEvaluateContext();
 
   @NotNull

platform/script-debugger/backend/src/org/jetbrains/debugger/VmBase.java

@@ -1,6 +1,7 @@
 package org.jetbrains.debugger;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.concurrency.Promise;
 
 public abstract class VmBase implements Vm, Vm.AttachStateManager {
@@ -11,7 +12,7 @@ public abstract class VmBase implements Vm, Vm.AttachStateManager {
     this.debugListener = debugListener;
   }
 
-  @NotNull
+  @Nullable
   @Override
   public final synchronized EvaluateContext getEvaluateContext() {
     if (evaluateContext == null) {
@@ -20,8 +21,10 @@ public abstract class VmBase implements Vm, Vm.AttachStateManager {
     return evaluateContext;
   }
 
-  @NotNull
-  protected abstract EvaluateContext computeEvaluateContext();
+  @Nullable
+  protected EvaluateContext computeEvaluateContext() {
+    return null;
+  }
 
   @NotNull
   @Override