check if form is dirty

highlightingdialog.py

@@ -71,7 +71,7 @@ class HighlightingDialog(QDialog):
 
         row = row + 1
         self.buttons = QDialogButtonBox()
-        self.buttons.setStandardButtons(QDialogButtonBox.StandardButton.Cancel | QDialogButtonBox.StandardButton.Save)
+        self.buttons.setStandardButtons(QDialogButtonBox.StandardButton.Cancel | QDialogButtonBox.StandardButton.Ok)
         self.buttons.accepted.connect(self._save)
         self.buttons.rejected.connect(self.close)
         form_grid.addWidget(self.buttons, row, 0, 1, 2)
@@ -126,6 +126,16 @@ class HighlightingDialog(QDialog):
         self.list.setCurrentIndex(index.sibling(selected_index + 1, 0))
 
     def _save(self):
+
+        if self._is_dirty():
+            unsaved = QMessageBox(QMessageBox.Icon.Question, self.tr("unsaved changes"),
+                                  self.tr("You have unsaved changes. Continue?"))
+            unsaved.setStandardButtons(QMessageBox.StandardButton.Cancel)
+            unsaved.addButton(QPushButton(self.tr("Continue")), QMessageBox.ButtonRole.AcceptRole)
+            result = unsaved.exec()
+            if result == QMessageBox.StandardButton.Cancel:
+                return
+
         highlighters = []
         for index in range(0, self.list.count()):
             item: PayloadItem = self.list.item(index)
@@ -156,6 +166,21 @@ class HighlightingDialog(QDialog):
             self.hit_background_color.set_color(highlighter.hit_background_color)
             self.line_background_color.set_color(highlighter.line_background_color)
 
+    def _is_dirty(self):
+        if len(self.list.selectedIndexes()) == 0:
+            dirty = False
+        if len(self.list.selectedIndexes()) == 1:
+            item: PayloadItem = self.list.currentItem()
+            highlighter: HighlightRegex = item.payload
+            dirty = self.query.text() != highlighter.query \
+                    or self.ignore_case.isChecked() != highlighter.ignore_case \
+                    or self.is_regex.isChecked() != highlighter.is_regex \
+                    or self.hit_background_color.color != highlighter.hit_background_color \
+                    or self.line_background_color.color != highlighter.line_background_color
+        else:
+            dirty = False
+        return dirty
+
     def _load_existing_hightlighters(self):
         highlighters: [HighlightRegex] = Highlighting.read_config(self._settings)
         first_item = None