Minor: get line start without whitespaces in KotlinExtraVariablesProvider

#KT-10183 Fxied

idea/src/org/jetbrains/kotlin/idea/debugger/KotlinFrameExtraVariablesProvider.kt

@@ -34,9 +34,12 @@ import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.caches.resolve.analyzeFully
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
+import org.jetbrains.kotlin.idea.core.refactoring.getLineEndOffset
+import org.jetbrains.kotlin.idea.core.refactoring.getLineStartOffset
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.utils.addToStdlib.check
 import java.util.*
 
 public class KotlinFrameExtraVariablesProvider : FrameExtraVariablesProvider {
@@ -61,8 +64,7 @@ private fun findAdditionalExpressions(position: SourcePosition): Set<TextWithImp
         return emptySet()
     }
 
-    val offset = doc.getLineStartOffset(line)
+    val offset = file.getLineStartOffset(line)?.check { it > 0 } ?: return emptySet()
-    if (offset < 0) return emptySet()
 
     val elem = file.findElementAt(offset)
     val containingElement = getContainingElement(elem!!) ?: elem ?: return emptySet()
@@ -79,8 +81,8 @@ private fun findAdditionalExpressions(position: SourcePosition): Set<TextWithImp
         endLine++
     }
 
-    val startOffset = doc.getLineStartOffset(startLine)
+    val startOffset = file.getLineStartOffset(startLine) ?: return emptySet()
-    val endOffset = doc.getLineEndOffset(endLine)
+    val endOffset = file.getLineEndOffset(endLine) ?: return emptySet()
 
     if (startOffset >= endOffset) return emptySet()
 

idea/testData/debugger/tinyApp/outs/evFunctionDeclaration.out

@@ -0,0 +1,24 @@
+LineBreakpoint created at evFunctionDeclaration.kt:5
+!JDK_HOME!\bin\java -agentlib:jdwp=transport=dt_socket,address=!HOST_NAME!:!HOST_PORT!,suspend=y,server=n -Dfile.encoding=!FILE_ENCODING! -classpath !OUTPUT_PATH!;!KOTLIN_RUNTIME!;!CUSTOM_LIBRARY!;!RT_JAR! evFunctionDeclaration.EvFunctionDeclarationKt
+Connected to the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+evFunctionDeclaration.kt:5
+package evFunctionDeclaration
+
+class A(val a: Int) {
+    //Breakpoint!
+    fun foo() = a
+}
+
+fun main(args: Array<String>) {
+    A(1).foo()
+}
+
+// PRINT_FRAME
+Compile bytecode for a
+ frame    = foo():5, A {evFunctionDeclaration}
+   this     = this = {evFunctionDeclaration.A@uniqueID}
+     field    = a: int = 1 (sp = evFunctionDeclaration.kt, 3)
+   extra    = a
+Disconnected from the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+
+Process finished with exit code 0

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/extraVariables/evFunctionDeclaration.kt

@@ -0,0 +1,12 @@
+package evFunctionDeclaration
+
+class A(val a: Int) {
+    //Breakpoint!
+    fun foo() = a
+}
+
+fun main(args: Array<String>) {
+    A(1).foo()
+}
+
+// PRINT_FRAME

idea/tests/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinEvaluateExpressionTestGenerated.java

@@ -390,6 +390,12 @@ public class KotlinEvaluateExpressionTestGenerated extends AbstractKotlinEvaluat
                 doSingleBreakpointTest(fileName);
             }
 
+            @TestMetadata("evFunctionDeclaration.kt")
+            public void testEvFunctionDeclaration() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/extraVariables/evFunctionDeclaration.kt");
+                doSingleBreakpointTest(fileName);
+            }
+
             @TestMetadata("evLineRange.kt")
             public void testEvLineRange() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/extraVariables/evLineRange.kt");