avoid loading documents for all stack frames files

java/debugger/impl/src/com/intellij/debugger/engine/JavaStackFrame.java

@@ -34,15 +34,19 @@ import com.intellij.debugger.ui.tree.render.ClassRenderer;
 import com.intellij.debugger.ui.tree.render.DescriptorLabelListener;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Computable;
 import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.pom.Navigatable;
 import com.intellij.ui.ColoredTextContainer;
 import com.intellij.xdebugger.XDebugSession;
 import com.intellij.xdebugger.XSourcePosition;
 import com.intellij.xdebugger.evaluation.XDebuggerEvaluator;
 import com.intellij.xdebugger.frame.*;
 import com.intellij.xdebugger.frame.presentation.XValuePresentation;
+import com.intellij.xdebugger.impl.XSourcePositionImpl;
 import com.intellij.xdebugger.impl.ui.XDebuggerUIConstants;
 import com.intellij.xdebugger.settings.XDebuggerSettingsManager;
 import com.sun.jdi.*;
@@ -83,12 +87,7 @@ public class JavaStackFrame extends XStackFrame {
     }
     myDebugProcess = ((DebugProcessImpl)descriptor.getDebugProcess());
     myNodeManager = myDebugProcess.getXdebugProcess().getNodeManager();
-    myXSourcePosition = ApplicationManager.getApplication().runReadAction(new Computable<XSourcePosition>() {
-      @Override
-      public XSourcePosition compute() {
-        return myDescriptor.getSourcePosition() != null ? DebuggerUtilsEx.toXSourcePosition(myDescriptor.getSourcePosition()) : null;
-      }
-    });
+    myXSourcePosition = myDescriptor.getSourcePosition() != null ? new JavaXSourcePosition(myDescriptor.getSourcePosition()) : null;
   }
 
   @NotNull
@@ -408,4 +407,34 @@ public class JavaStackFrame extends XStackFrame {
       return "JavaFrame position unknown";
     }
   }
+
+  private static class JavaXSourcePosition implements XSourcePosition {
+    private final SourcePosition mySourcePosition;
+
+    public JavaXSourcePosition(@NotNull SourcePosition sourcePosition) {
+      mySourcePosition = sourcePosition;
+    }
+
+    @Override
+    public int getLine() {
+      return mySourcePosition.getLine();
+    }
+
+    @Override
+    public int getOffset() {
+      return mySourcePosition.getOffset();
+    }
+
+    @NotNull
+    @Override
+    public VirtualFile getFile() {
+      return mySourcePosition.getFile().getVirtualFile();
+    }
+
+    @NotNull
+    @Override
+    public Navigatable createNavigatable(@NotNull Project project) {
+      return XSourcePositionImpl.createOpenFileDescriptor(project, this);
+    }
+  }
 }

platform/xdebugger-impl/src/com/intellij/xdebugger/impl/ui/ExecutionPointHighlighter.java

@@ -177,7 +177,7 @@ public class ExecutionPointHighlighter {
   private void addHighlighter() {
     int line = mySourcePosition.getLine();
     Document document = myEditor.getDocument();
-    if (line >= document.getLineCount()) return;
+    if (line < 0 || line >= document.getLineCount()) return;
 
     if (myUseSelection) {
       myEditor.getSelectionModel().setSelection(document.getLineStartOffset(line), document.getLineEndOffset(line) + document.getLineSeparatorLength(line));