Hint diff dialog: color added, removed and hunk lines

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/sb_builder/hints_tab.py b/sb_builder/hints_tab.py
index 8d0bed4..2956abc 100644
--- a/sb_builder/hints_tab.py
+++ b/sb_builder/hints_tab.py
@@ -20,7 +20,7 @@ import difflib
 import os
 
 from PyQt6.QtCore import Qt, pyqtSignal
-from PyQt6.QtGui import QColor, QFontDatabase, QKeySequence, QShortcut
+from PyQt6.QtGui import QColor, QFontDatabase, QKeySequence, QShortcut, QSyntaxHighlighter
 from PyQt6.QtWidgets import (QCheckBox, QDialog, QHBoxLayout, QLabel, QLineEdit, QListWidget,
                              QListWidgetItem, QMessageBox, QPlainTextEdit, QPushButton, QSplitter,
                              QTableWidget, QTableWidgetItem, QVBoxLayout, QWidget)
@@ -206,6 +206,18 @@ class HintsTab(QWidget):
         self.reload()
 
 
+class DiffColors(QSyntaxHighlighter):
+    """Unified diff colors: added green, removed red, hunk headers blue."""
+
+    COLORS = (("+++", None), ("---", None), ("+", STATUS["ok"]), ("-", STATUS["failed"]),
+              ("@@", "#3b8bd0"))
+
+    def highlightBlock(self, text):
+        color = next((c for prefix, c in self.COLORS if text.startswith(prefix)), None)
+        if color:
+            self.setFormat(0, len(text), QColor(color))
+
+
 class HintResultDialog(QDialog):
     """After a hint job: each changed package's diff, Revert per package, Build these."""
 
@@ -224,6 +236,7 @@ class HintResultDialog(QDialog):
             self.list.addItem(item)
         self.list.currentItemChanged.connect(self._show)
         self.diff = QPlainTextEdit(readOnly=True)
+        self.colors = DiffColors(self.diff.document())
         self.diff.setFont(QFontDatabase.systemFont(QFontDatabase.SystemFont.FixedFont))
         split = QSplitter()
         split.addWidget(self.list)