fix bug with deleting and recreating entries in wxFileConfig (patch 1796866)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48776 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -228,6 +228,13 @@ wxX11:
 - Make Enter key activate the default button (David Hart).
 
 
+2.8.6
+-----
+
+All:
+
+- Fixed another bug in wxFileConfig when deleting entries (Axel Gembe)
+
 2.8.5
 -----
 

src/common/fileconf.cpp

@@ -1810,29 +1810,21 @@ bool wxFileConfigGroup::DeleteEntry(const wxString& name)
       // our last entry is being deleted - find the last one which stays
       wxASSERT( m_pLine != NULL );  // if we have an entry with !NULL pLine...
 
-      // go back until we find another entry or reach the group's line
+      // find the previous entry (if any)
       wxFileConfigEntry *pNewLast = NULL;
-      size_t n, nEntries = m_aEntries.GetCount();
+      const wxFileConfigLineList * const
-      wxFileConfigLineList *pl;
+        pNewLastLine = m_pLastEntry->GetLine()->Prev();
-      for ( pl = pLine->Prev(); pl != m_pLine; pl = pl->Prev() ) {
+      const size_t nEntries = m_aEntries.GetCount();
-        // is it our subgroup?
+      for ( size_t n = 0; n < nEntries; n++ ) {
-        for ( n = 0; (pNewLast == NULL) && (n < nEntries); n++ ) {
+        if ( m_aEntries[n]->GetLine() == pNewLastLine ) {
-          if ( m_aEntries[n]->GetLine() == m_pLine )
+          pNewLast = m_aEntries[n];
-            pNewLast = m_aEntries[n];
-        }
-
-        if ( pNewLast != NULL ) // found?
           break;
+        }
       }
 
-      if ( pl == m_pLine ) {
+      // pNewLast can be NULL here -- it's ok and can happen if we have no
-        wxASSERT( !pNewLast );  // how comes it has the same line as we?
+      // entries left
-
+      m_pLastEntry = pNewLast;
-        // we've reached the group line without finding any subgroups
-        m_pLastEntry = NULL;
-      }
-      else
-        m_pLastEntry = pNewLast;
     }
 
     m_pConfig->LineListRemove(pLine);

tests/config/fileconf.cpp

@@ -70,6 +70,7 @@ private:
         CPPUNIT_TEST( Binary );
         CPPUNIT_TEST( Save );
         CPPUNIT_TEST( DeleteEntry );
+        CPPUNIT_TEST( DeleteAndWriteEntry );
         CPPUNIT_TEST( DeleteGroup );
         CPPUNIT_TEST( DeleteAll );
         CPPUNIT_TEST( RenameEntry );
@@ -89,6 +90,7 @@ private:
     void Binary();
     void Save();
     void DeleteEntry();
+    void DeleteAndWriteEntry();
     void DeleteGroup();
     void DeleteAll();
     void RenameEntry();
@@ -324,6 +326,47 @@ void FileConfigTestCase::DeleteEntry()
                          fc );
 }
 
+void FileConfigTestCase::DeleteAndWriteEntry()
+{
+    wxStringInputStream sis(
+            "[root/group1]\n"
+            "subentry=subvalue\n"
+            "subentry2=subvalue2\n"
+            "subentry3=subvalue3\n"
+    );
+
+    wxFileConfig fc(sis);
+
+    fc.DeleteEntry("/root/group1/subentry2");
+    fc.Write("/root/group1/subentry2", "testvalue");
+    fc.DeleteEntry("/root/group2/subentry2");
+    fc.Write("/root/group2/subentry2", "testvalue2");
+    fc.DeleteEntry("/root/group1/subentry2");
+    fc.Write("/root/group1/subentry2", "testvalue");
+    fc.DeleteEntry("/root/group2/subentry2");
+    fc.Write("/root/group2/subentry2", "testvalue2");
+
+    wxVERIFY_FILECONFIG( "[root/group1]\n"
+                         "subentry=subvalue\n"
+                         "subentry3=subvalue3\n"
+                         "subentry2=testvalue\n"
+                         "[root/group2]\n"
+                         "subentry2=testvalue2\n",
+                         fc );
+
+    fc.DeleteEntry("/root/group2/subentry2");
+    wxVERIFY_FILECONFIG( "[root/group1]\n"
+                         "subentry=subvalue\n"
+                         "subentry3=subvalue3\n"
+                         "subentry2=testvalue\n",
+                         fc );
+
+    fc.DeleteEntry("/root/group1/subentry2");
+    fc.DeleteEntry("/root/group1/subentry");
+    fc.DeleteEntry("/root/group1/subentry3");
+    wxVERIFY_FILECONFIG( "", fc );
+}
+
 void FileConfigTestCase::DeleteGroup()
 {
     wxStringInputStream sis(testconfig);