feat: jump to result (#58)

Co-authored-by: Maurice Van Wassenhove <mauricevanwassenhove@gmail.com>

src/jvmMain/kotlin/ui/codeview/CodeViewer.kt

@@ -132,7 +132,7 @@ fun CodeViewer(viewModel: DebuggerViewModel) {
                             }
                         }
 
-                        InstructionViewer(instruction, maxOffsetLength, color, inCatch)
+                        InstructionViewer(viewModel, instruction, maxOffsetLength, color, inCatch)
                     }
 
                     // There is an error to display at the current instruction

src/jvmMain/kotlin/ui/codeview/InstructionViewer.kt

@@ -1,15 +1,23 @@
 package ui.codeview
 
+import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.onClick
 import androidx.compose.material3.Divider
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
@@ -18,16 +26,24 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import data.InstructionRecord
 import ui.Colors
+import viewmodel.DebuggerViewModel
+import viewmodel.Display
 
 /**
  * Display the current instruction. Highlight it if it is the current one.
  */
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
-fun InstructionViewer(instruction: InstructionRecord, maxOffsetLength: Int, color: Color, inCatch: Boolean) {
+fun InstructionViewer(viewModel: DebuggerViewModel, instruction: InstructionRecord, maxOffsetLength: Int, color: Color, inCatch: Boolean) {
     val dividerColor = if (inCatch) Colors.Red.value else MaterialTheme.colorScheme.onSurfaceVariant
+    var expandedSelection by remember {
+        mutableStateOf(false)
+    }
 
     Row(
-        Modifier.fillMaxWidth().background(color),
+        Modifier.fillMaxWidth().background(color).onClick {
+            expandedSelection = true
+        },
         verticalAlignment = Alignment.CenterVertically,
     ) {
         // Pad with whitespaces to align the offsets
@@ -52,5 +68,34 @@ fun InstructionViewer(instruction: InstructionRecord, maxOffsetLength: Int, colo
             fontFamily = FontFamily.Monospace,
             modifier = Modifier.padding(start = 16.dp),
         )
+
+        viewModel.codeAttribute?.let { codeAttribute ->
+            DropdownMenu(expandedSelection, { expandedSelection = false }) {
+                DropdownMenuItem({ Text("Result") }, onClick = {
+                    expandedSelection = false
+                    val instructionIndex = codeAttribute.instructions.indexOf(instruction)
+                    viewModel.display = Display.RESULTS
+                    viewModel.instructionIndex = instructionIndex
+                })
+
+                codeAttribute.blockEvaluations.withIndex().flatMap { blockIndex ->
+                    // Filter: match instruction
+                    blockIndex.value.evaluations.filter { evaluationIndex ->
+                        evaluationIndex.instructionOffset == instruction.offset
+                    }.withIndex().map { evaluationIndex ->
+                        // Pair of <Block index; evaluation index> with a pair containing the evaluation
+                        Pair(Pair(blockIndex.index, evaluationIndex.index), evaluationIndex.value)
+                    }
+                }.forEach() {
+                    val evalCount = it.second.evaluationCount + 1
+                    DropdownMenuItem({ Text(evalCount.toString()) }, onClick = {
+                        expandedSelection = false
+                        viewModel.display = Display.EVALUATIONS
+                        viewModel.updateEvaluationBlockIndex(it.first.first)
+                        viewModel.evaluationIndex = it.first.second
+                    })
+                }
+            }
+        }
     }
 }