Debug Layout option added.

apps/dvxbasic/ide/ideMain.c

@@ -109,6 +109,7 @@
 #define CMD_WIN_CALLSTACK 153
 #define CMD_WIN_WATCH     154
 #define CMD_WIN_BREAKPOINTS 155
+#define CMD_DEBUG_LAYOUT    156
 #define IDE_MAX_IMM      1024
 #define IDE_DESIGN_W     400
 #define IDE_DESIGN_H     300
@@ -281,8 +282,9 @@ static int32_t sOutputLen = 0;
 // swaps directly between buffers with no splicing needed.
 static char   *sGeneralBuf  = NULL;  // (General) section: module-level code
 static char  **sProcBufs    = NULL;  // stb_ds array: one buffer per procedure
-static int32_t sCurProcIdx  = -2;    // which buffer is in the editor (-1=General, -2=none)
-static int32_t sEditorFileIdx = -1;  // which project file owns sProcBufs (-1=none)
+static int32_t sCurProcIdx    = -2;    // which buffer is in the editor (-1=General, -2=none)
+static int32_t sEditorFileIdx = -1;   // which project file owns sProcBufs (-1=none)
+static int32_t sEditorLineCount = 0;  // line count for breakpoint adjustment on edit
 
 // Find/Replace state
 static char sFindText[256]    = "";
@@ -730,6 +732,8 @@ static void buildWindow(void) {
 
     MenuT *toolsMenu = wmAddMenu(menuBar, "&Tools");
     wmAddMenuItem(toolsMenu, "&Preferences...", CMD_PREFERENCES);
+    wmAddMenuSeparator(toolsMenu);
+    wmAddMenuCheckItem(toolsMenu, "Debug &Layout", CMD_DEBUG_LAYOUT, false);
 
     MenuT *helpMenu = wmAddMenu(menuBar, "&Help");
     wmAddMenuItem(helpMenu, "&About DVX BASIC...", CMD_HELP_ABOUT);
@@ -1135,6 +1139,54 @@ static void toggleBreakpointLine(int32_t editorLine) {
         }
     }
 
+    // Validate that this line is breakable (not blank, comment, or SUB/FUNCTION decl/end)
+    if (sEditor) {
+        const char *text = wgtGetText(sEditor);
+
+        if (text) {
+            // Find the start of editorLine (1-based)
+            const char *p = text;
+            int32_t ln = 1;
+
+            while (*p && ln < editorLine) {
+                if (*p == '\n') {
+                    ln++;
+                }
+
+                p++;
+            }
+
+            // Skip leading whitespace
+            while (*p == ' ' || *p == '\t') {
+                p++;
+            }
+
+            // Blank line
+            if (*p == '\0' || *p == '\n' || *p == '\r') {
+                return;
+            }
+
+            // Comment (single quote or REM)
+            if (*p == '\'') {
+                return;
+            }
+
+            if (strncasecmp(p, "REM ", 4) == 0 || strncasecmp(p, "REM\n", 4) == 0 ||
+                strncasecmp(p, "REM\r", 4) == 0 || strcasecmp(p, "REM") == 0) {
+                return;
+            }
+
+            // SUB/FUNCTION declaration or END SUB/FUNCTION
+            if (strncasecmp(p, "SUB ", 4) == 0 || strncasecmp(p, "FUNCTION ", 9) == 0) {
+                return;
+            }
+
+            if (strncasecmp(p, "END SUB", 7) == 0 || strncasecmp(p, "END FUNCTION", 12) == 0) {
+                return;
+            }
+        }
+    }
+
     // Add new breakpoint
     IdeBreakpointT bp;
     memset(&bp, 0, sizeof(bp));
@@ -4225,6 +4277,10 @@ static void onMenu(WindowT *win, int32_t menuId) {
         showPreferencesDialog();
     }
 
+    if (menuId == CMD_DEBUG_LAYOUT && sWin && sWin->menuBar) {
+        wgtSetDebugLayout(sAc, wmMenuItemIsChecked(sWin->menuBar, CMD_DEBUG_LAYOUT));
+    }
+
     if (menuId == CMD_HELP_ABOUT) {
         dvxMessageBox(sAc, "About DVX BASIC",
             "DVX BASIC 1.0\n"
@@ -7070,9 +7126,71 @@ static void updateWatchWindow(void) {
 // setStatus
 // ============================================================
 
+static int32_t countLines(const char *text) {
+    if (!text || !text[0]) {
+        return 1;
+    }
+
+    int32_t n = 1;
+
+    for (const char *p = text; *p; p++) {
+        if (*p == '\n') {
+            n++;
+        }
+    }
+
+    return n;
+}
+
+
 static void onEditorChange(WidgetT *w) {
     (void)w;
 
+    // Adjust breakpoints when lines are added or removed
+    if (sEditor && sBreakpointCount > 0) {
+        const char *text = wgtGetText(sEditor);
+        int32_t newLineCount = countLines(text);
+        int32_t delta = newLineCount - sEditorLineCount;
+
+        if (delta != 0) {
+            int32_t fileIdx    = sProject.activeFileIdx;
+            int32_t cursorLine = wgtTextAreaGetCursorLine(sEditor);
+
+            // Convert editor cursor line to file code line
+            int32_t editCodeLine = cursorLine;
+
+            if (sCurProcIdx >= 0 && sCurProcIdx < (int32_t)arrlen(sProcTable)) {
+                editCodeLine = sProcTable[sCurProcIdx].lineNum + cursorLine - 1;
+            }
+
+            bool changed = false;
+
+            for (int32_t i = sBreakpointCount - 1; i >= 0; i--) {
+                if (sBreakpoints[i].fileIdx != fileIdx) {
+                    continue;
+                }
+
+                if (sBreakpoints[i].codeLine >= editCodeLine) {
+                    sBreakpoints[i].codeLine += delta;
+
+                    // Remove if shifted to invalid line
+                    if (sBreakpoints[i].codeLine < 1) {
+                        arrdel(sBreakpoints, i);
+                        sBreakpointCount = (int32_t)arrlen(sBreakpoints);
+                    }
+
+                    changed = true;
+                }
+            }
+
+            if (changed) {
+                updateBreakpointWindow();
+            }
+
+            sEditorLineCount = newLineCount;
+        }
+    }
+
     // Mark the active file as modified
     if (sProject.activeFileIdx >= 0 && sProject.activeFileIdx < sProject.fileCount) {
         sProject.files[sProject.activeFileIdx].modified = true;
@@ -7841,6 +7959,7 @@ static void showProc(int32_t procIdx) {
         sCurProcIdx = procIdx;
     }
 
+    sEditorLineCount = countLines(wgtGetText(sEditor));
     sEditor->onChange = savedOnChange;
 }