| 886 | } |
| 887 | |
| 888 | int Document::Undo() { |
| 889 | int newPos = -1; |
| 890 | CheckReadOnly(); |
| 891 | if ((enteredModification == 0) && (cb.IsCollectingUndo())) { |
| 892 | enteredModification++; |
| 893 | if (!cb.IsReadOnly()) { |
| 894 | bool startSavePoint = cb.IsSavePoint(); |
| 895 | bool multiLine = false; |
| 896 | int steps = cb.StartUndo(); |
| 897 | //Platform::DebugPrintf("Steps=%d\n", steps); |
| 898 | int coalescedRemovePos = -1; |
| 899 | int coalescedRemoveLen = 0; |
| 900 | int prevRemoveActionPos = -1; |
| 901 | int prevRemoveActionLen = 0; |
| 902 | for (int step = 0; step < steps; step++) { |
| 903 | const int prevLinesTotal = LinesTotal(); |
| 904 | const Action &action = cb.GetUndoStep(); |
| 905 | if (action.at == removeAction) { |
| 906 | NotifyModified(DocModification( |
| 907 | SC_MOD_BEFOREINSERT | SC_PERFORMED_UNDO, action)); |
| 908 | } else if (action.at == containerAction) { |
| 909 | DocModification dm(SC_MOD_CONTAINER | SC_PERFORMED_UNDO); |
| 910 | dm.token = action.position; |
| 911 | NotifyModified(dm); |
| 912 | if (!action.mayCoalesce) { |
| 913 | coalescedRemovePos = -1; |
| 914 | coalescedRemoveLen = 0; |
| 915 | prevRemoveActionPos = -1; |
| 916 | prevRemoveActionLen = 0; |
| 917 | } |
| 918 | } else { |
| 919 | NotifyModified(DocModification( |
| 920 | SC_MOD_BEFOREDELETE | SC_PERFORMED_UNDO, action)); |
| 921 | } |
| 922 | cb.PerformUndoStep(); |
| 923 | if (action.at != containerAction) { |
| 924 | ModifiedAt(action.position); |
| 925 | newPos = action.position; |
| 926 | } |
| 927 | |
| 928 | int modFlags = SC_PERFORMED_UNDO; |
| 929 | // With undo, an insertion action becomes a deletion notification |
| 930 | if (action.at == removeAction) { |
| 931 | newPos += action.lenData; |
| 932 | modFlags |= SC_MOD_INSERTTEXT; |
| 933 | if ((coalescedRemoveLen > 0) && |
| 934 | (action.position == prevRemoveActionPos || action.position == (prevRemoveActionPos + prevRemoveActionLen))) { |
| 935 | coalescedRemoveLen += action.lenData; |
| 936 | newPos = coalescedRemovePos + coalescedRemoveLen; |
| 937 | } else { |
| 938 | coalescedRemovePos = action.position; |
| 939 | coalescedRemoveLen = action.lenData; |
| 940 | } |
| 941 | prevRemoveActionPos = action.position; |
| 942 | prevRemoveActionLen = action.lenData; |
| 943 | } else if (action.at == insertAction) { |
| 944 | modFlags |= SC_MOD_DELETETEXT; |
| 945 | coalescedRemovePos = -1; |
nothing calls this directly
no test coverage detected