3 using System.Collections;
4 using System.Collections.Generic;
11 public enum MTextFormat
13 MTEXT_FORMAT_US_ASCII,
15 MTEXT_FORMAT_UTF_16BE,
16 MTEXT_FORMAT_UTF_16LE,
17 MTEXT_FORMAT_UTF_32BE,
18 MTEXT_FORMAT_UTF_32LE,
22 public class MTextProperty
28 internal enum Flag : byte
37 public MSymbol Key { get { return key; } }
38 public object Val { get { return val; } }
39 public bool FrontSticky
41 get { return (flags & Flag.FrontSticky) != Flag.None; }
43 public bool RearSticky
45 get { return (flags & Flag.RearSticky) != Flag.None; }
49 get { return (flags & Flag.Sensitive) != Flag.None; }
52 public MTextProperty (MSymbol key, object val)
56 flags |= Flag.RearSticky;
59 public MTextProperty (MSymbol key, object val,
60 bool front_sticky, bool rear_sticky, bool sensitive)
65 flags |= Flag.FrontSticky;
67 flags |= Flag.RearSticky;
69 flags |= Flag.Sensitive;
72 public override string ToString ()
74 return key.ToString () + ":" + val;
78 public class MText : IEnumerable, IEquatable<MText>, IComparable<MText>
81 public enum MTextFormat format;
83 private StringBuilder sb;
85 private int cache_pos;
86 private int cache_idx;
87 private MPlist intervals;
88 private MPlist default_property;
89 private bool read_only;
91 private static UTF8Encoding utf8 = new UTF8Encoding ();
93 private static int count_chars (String str)
95 int len = str.Length, n = 0;
97 for (int i = 0; i < len; i++, n++)
98 if (surrogate_high_p (str[i]))
103 private static int count_chars (StringBuilder str)
105 int len = str.Length, n = 0;
107 for (int i = 0; i < len; i++, n++)
108 if (surrogate_high_p (str[i]))
115 sb = new StringBuilder ();
116 intervals = new MPlist ();
119 public MText (byte[] str)
121 sb = new StringBuilder (utf8.GetString (str));
122 nchars = count_chars (sb);
123 intervals = new MPlist ();
126 public MText (String str)
128 sb = new StringBuilder (str);
129 nchars = count_chars (str);
130 intervals = new MPlist ();
133 public MText (StringBuilder str)
136 nchars = count_chars (str);
137 intervals = new MPlist ();
140 public static MText operator+ (MText mt1, MText mt2)
142 MText mt = new MText ();
144 mt.sb.Append (mt1.sb);
145 mt.sb.Append (mt2.sb);
146 mt.nchars = mt1.nchars + mt2.nchars;
151 public bool ReadOnly { get { return read_only; } }
152 public int Length { get { return nchars; } }
156 // for IEnumerable interface
157 public IEnumerator GetEnumerator() { return new MTextEnum (this); }
159 // for IEquatable interface
160 public bool Equals (MText other) { return this.sb.Equals (other.sb); }
162 // for IComparable interface
163 public int CompareTo (MText other)
165 return this.sb.ToString ().CompareTo (other.sb.ToString ());
168 public override String ToString () { return "\"" + sb.ToString () + "\""; }
170 private static bool surrogate_high_p (char c)
172 return (c >= 0xD800 && c < 0xDC00);
175 private static bool surrogate_low_p (char c)
177 return (c >= 0xDC00 && c < 0xE000);
180 private static int inc_idx (StringBuilder sb, int i)
182 return (i + (surrogate_high_p (sb[i]) ? 2 : 1));
185 private static int dec_idx (StringBuilder sb, int i)
187 return (i - (surrogate_low_p (sb[i - 1]) ? 2 : 1));
190 private static int pos_to_idx (MText mt, int pos)
192 if (pos == mt.cache_pos)
198 if (pos < mt.cache_pos)
200 if (mt.cache_pos == mt.cache_idx)
202 if (pos < mt.cache_pos - pos)
209 p = mt.cache_pos; i = mt.cache_idx;
215 if (mt.nchars - mt.cache_pos == mt.sb.Length - mt.cache_idx)
216 return (mt.cache_idx + pos - mt.cache_pos);
217 if (pos - mt.cache_pos < mt.nchars - pos)
219 p = mt.cache_pos; i = mt.cache_idx;
224 p = mt.nchars; i = mt.sb.Length;
229 for (; p < pos; i = inc_idx (mt.sb, i), p++);
231 for (; p > pos; i = dec_idx (mt.sb, i), p--);
237 private void check_pos (int pos, bool tail_ok)
239 if (pos < 0 || (tail_ok ? pos > nchars : pos >= nchars))
240 throw new Exception ("Invalid MText position:" + pos);
243 private bool check_range (int from, int to, bool zero_ok)
245 if (from < 0 || (zero_ok ? from > to : from >= to)
247 throw new Exception ("Invalid MText range");
251 private void insert (int pos, MText mt2, int from, int to)
253 check_pos (pos, true);
255 int pos_idx = pos_to_idx (this, pos);
256 int from_idx = pos_to_idx (mt2, from);
257 int to_idx = pos_to_idx (mt2, to);
259 sb.Insert (pos_idx, mt2.sb.ToString (from_idx, to_idx - from_idx));
262 foreach (MPlist plist in mt2.intervals)
263 if (intervals.Find (plist.Key) == null)
264 intervals.Push (plist.Key, new MInterval (plist.Key, this));
265 foreach (MPlist plist in intervals)
267 MPlist p = mt2.intervals.Find (plist.Key);
271 interval = new MInterval (plist.Key, this, to - from);
273 interval = ((MInterval) p.Val).Copy (from, to);
274 ((MInterval) plist.Val).Insert (pos, interval);
278 private void insert (int pos, int c)
280 check_pos (pos, true);
282 int pos_idx = pos_to_idx (this, pos);
287 sb.Insert (pos_idx, ch);
291 char high = (char) (0xD800 + ((c - 0x10000) >> 10));
292 char low = (char) (0xDC00 + ((c - 0x10000) & 0x3FF));
293 sb.Insert (pos_idx, low);
294 sb.Insert (pos_idx, high);
297 foreach (MPlist plist in intervals)
298 ((MInterval) plist.Val).Insert (pos,
299 new MInterval (plist.Key, this, 1));
302 public int this[int i]
305 i = pos_to_idx (this, i);
308 if (surrogate_high_p (sb[i]))
310 sb[i] = (char) value;
314 char high = (char) (0xD800 + ((value - 0x10000) >> 10));
315 char low = (char) (0xDC00 + ((value - 0x10000) & 0x3FF));
317 if (! surrogate_high_p (sb[i]))
324 i = pos_to_idx (this, i);
325 return (surrogate_high_p (sb[i])
326 ? ((sb[i] - 0xD800) << 10) + (sb[i + 1] - 0xDC00) + 0x10000
333 MText mt = new MText (sb.ToString ());
335 foreach (MPlist p in intervals)
336 mt.intervals.Add (p.Key, ((MInterval) p.Val).Copy (0, Length));
340 public MText Ins (int pos, int c)
346 public MText Ins (int pos, MText mt)
348 insert (pos, mt, 0, mt.nchars);
352 public MText Ins (int pos, MText mt, int from, int to)
354 insert (pos, mt, from, to);
358 public MText Cat (int c)
364 public MText Del (int from, int to)
366 if (check_range (from, to, true))
369 sb.Remove (from, pos_to_idx (this, to) - pos_to_idx (this, from));
373 foreach (MPlist plist in intervals)
374 ((MInterval) plist.Val).Delete (from, to);
376 intervals = new MPlist ();
380 public object GetProp (int pos, MSymbol key)
382 check_pos (pos, false);
384 MInterval i = (MInterval) intervals.Get (key);
388 MTextProperty prop = i.Get (pos);
389 return (prop != null ? prop.Val : null);
392 public object GetProp (int pos, MSymbol key, out MTextProperty prop)
394 check_pos (pos, false);
396 MInterval i = (MInterval) intervals.Get (key);
398 return (prop = null);
400 return (prop != null ? prop.Val : null);
403 public object GetProp (int pos, MSymbol key, out MTextProperty[] array)
405 check_pos (pos, false);
407 MInterval i = (MInterval) intervals.Get (key);
409 return (array = null);
410 MTextProperty prop = i.Get (pos, out array);
411 return (prop != null ? prop.Val : null);
414 public void PushProp (int from, int to, MSymbol key, object val)
416 if (! check_range (from, to, true))
417 PushProp (from, to, new MTextProperty (key, val));
420 public void PushProp (int from, int to, MTextProperty prop)
424 if (default_property == null)
425 default_property = new MPlist ();
426 default_property.Push (prop.key, prop.val);
430 if (check_range (from, to, true))
433 MPlist p = intervals.Find (prop.key);
438 root = new MInterval (prop.key, this);
439 intervals.Push (prop.key, root);
442 root = (MInterval) p.Val;
444 root.Push (from, to, prop);
448 public void PopProp (int from, int to, MSymbol key)
452 if (default_property == null)
454 MPlist p = default_property.Find (key);
461 if (check_range (from, to, true))
464 MPlist p = intervals.Find (key);
467 ((MInterval) p.Val).Pop (from, to);
471 public void DumpProp ()
474 foreach (MPlist p in intervals)
475 ((MInterval) p.Val).Dump (true);
476 Console.WriteLine (")");
479 public void DumpPropNested ()
482 foreach (MPlist p in intervals)
483 ((MInterval) p.Val).DumpNested (true);
484 Console.WriteLine (")");
487 private class MInterval
489 // position: 0 1 2 3 4 5 6 7
490 // | A | B | C | D | E F | G |
491 // interval |---|---|---|<->|-------|---|
492 // |---|<->|---| |<----->|---|
496 // [3 (1 2)] [3 (4 6)]
497 // [1 (0 1)] [2 (2 3)] [1 (6 7)]
499 private static int count = 0;
502 private int From, To;
504 private MPlist Stack;
505 private MInterval Left, Right, Parent;
508 public MInterval (MSymbol key, MText mt, int length)
511 throw new Exception ("Invalid interval length");
515 Stack = new MPlist ();
519 public MInterval (MSymbol key, MText mt)
523 Length = mt.sb.Length;
526 Stack = new MPlist ();
530 public MTextProperty Get (int pos)
532 MInterval i = find (pos);
534 return (i.Stack.IsEmpty ? null : (MTextProperty) i.Stack.Val);
537 public MTextProperty Get (int pos, out MTextProperty[] array)
539 MInterval i = find (pos);
546 array = new MTextProperty[i.Stack.Count];
550 for (idx = 0, p = i.Stack; ! p.IsEmpty; idx++, p = p.Next)
551 array[idx] = (MTextProperty) p.Val;
552 return array[idx - 1];
555 private MInterval (MSymbol key, MText mt, int length, MPlist stack)
562 Stack = stack.Clone ();
566 private void update_from_to ()
571 To = Length - RightLength;
573 else if (Parent.Left == this)
575 From = Parent.From - Length + LeftLength;
576 To = Parent.From - RightLength;
580 From = Parent.To + LeftLength;
581 To = Parent.To + Length - RightLength;
585 private int LeftLength
587 get { return (Left == null ? 0 : Left.Length); }
590 private int RightLength
592 get { return (Right == null ? 0 : Right.Length); }
595 private MInterval LeftMost
597 get { return (Left == null ? this : Left.LeftMost); }
600 private MInterval RightMost
602 get { return (Right == null ? this : Right.RightMost); }
605 private MInterval Prev {
610 for (i = Left; i.Right != null; i = i.Right);
613 MInterval child = this;
614 for (i = Parent; i != null && i.Left == child;
615 child = i, i = i.Parent);
621 private MInterval Next {
626 for (i = Right; i.Left != null; i = i.Left);
629 MInterval child = this;
630 for (i = Parent; i != null && i.Right == child;
631 child = i, i = i.Parent);
637 private MInterval find (int pos)
641 return Left.find (pos);
643 return Right.find (pos);
647 private bool mergeable (MInterval i)
651 for (p1 = Stack, p2 = i.Stack; ! p1.IsEmpty && ! p2.IsEmpty;
652 p1 = p1.Next, p2 = p2.Next)
653 if (p1.Val != p2.Val)
655 return (p1.IsEmpty && p2.IsEmpty);
658 // p-. or .-p p-. or .-p
659 // .-this-. .-right-.
660 // left .-right-. -> .-this-. c2
662 private MInterval promote_right ()
664 int right_length = Right.Length;
668 mtext.intervals.Put (Key, Right);
669 else if (Parent.Left == this)
672 Parent.Right = Right;
673 Right.Parent = Parent;
679 Parent.Length += Length;
680 Length -= right_length;
684 Parent.Length -= c1.Length;
690 // p-. or .-p p-. or .-p
692 // .-left-. .-right-. -> c1 .-this-.
694 private MInterval promote_left ()
696 int left_length = Left.Length;
700 mtext.intervals.Put (Key, Left);
701 else if (Parent.Left == this)
705 Left.Parent = Parent;
711 Parent.Length += Length;
712 Length -= left_length;
716 Parent.Length -= c1.Length;
722 private MInterval balance ()
729 // .-left-. .-right-.
731 int diff = i.LeftLength - i.RightLength;
736 new_diff = (i.Length - i.LeftLength
737 + i.Left.RightLength - i.Left.LeftLength);
738 if (Math.Abs (new_diff) >= diff)
740 i = i.promote_left ();
745 new_diff = (i.Length - i.RightLength
746 + i.Right.LeftLength - i.Right.RightLength);
747 if (Math.Abs (new_diff) >= diff)
749 i = i.promote_right ();
756 public MInterval Copy (int start, int end)
758 MInterval copy, left_copy = null, right_copy = null;
765 return Left.Copy (start, end);
766 left_copy = Left.Copy (start, From);
771 return Right.Copy (start, end);
772 right_copy = Right.Copy (To, end);
775 copy = new MInterval (Key, null, end - start, Stack);
776 remove_properties (MTextProperty.Flag.Sensitive);
777 if (left_copy != null)
779 copy.Left = left_copy;
780 left_copy.Parent = copy;
782 if (right_copy != null)
784 copy.Right = right_copy;
785 right_copy.Parent = copy;
793 private MInterval divide_right (int pos)
795 MInterval interval = new MInterval (Key, mtext, To - pos, Stack);
797 M17N.DebugPrint ("divide-right({0}) at ", pos); DumpOne (false, true);
801 interval.Right = Right;
802 Right.Parent = interval;
803 interval.Length += Right.Length;
805 interval.Parent = this;
813 private MInterval divide_left (int pos)
815 MInterval interval = new MInterval (Key, mtext, pos - From, Stack);
817 M17N.DebugPrint ("divide-left({0}) at ", pos); DumpOne (false, true);
821 interval.Left = Left;
822 Left.Parent = interval;
823 interval.Length += Left.Length;
825 interval.Parent = this;
830 private void remove_properties (MTextProperty.Flag flags)
832 for (MPlist p = Stack; ! p.IsEmpty;)
834 MTextProperty prop = (MTextProperty) p.Val;
836 if ((prop.flags & flags) == flags)
843 private void inherit_front_properties (MPlist plist)
845 for (MInterval i = LeftMost; i != null; i = i.Next)
849 for (MPlist p = plist; ! p.IsEmpty; p = p.Next)
851 MTextProperty prop = (MTextProperty) p.Val;
853 if ((prop.flags & MTextProperty.Flag.RearSticky)
854 == MTextProperty.Flag.RearSticky)
855 i.Stack.Add (prop.key, prop);
860 private void inherit_rear_properties (MPlist plist)
862 for (MInterval i = RightMost; i != null; i = i.Prev)
866 for (MPlist p = plist; ! p.IsEmpty; p = p.Next)
868 MTextProperty prop = (MTextProperty) p.Val;
870 if ((prop.flags & MTextProperty.Flag.FrontSticky)
871 == MTextProperty.Flag.FrontSticky)
872 i.Stack.Add (prop.key, prop);
877 private MInterval delete_node_forward ()
881 int len = Length - RightLength;
883 for (MInterval i = Parent; i != null; i = i.Parent)
885 if (Parent.Left == this)
888 Parent.Right = Right;
893 Right.Parent = Parent;
894 return Right.LeftMost;
899 private MInterval delete_node_backward ()
903 int len = Length - RightLength;
905 for (MInterval i = Parent; i != null; i = i.Parent)
907 if (Parent.Left == this)
915 Left.Parent = Parent;
916 return Left.RightMost;
921 private void set_mtext (MText mt)
927 Right.set_mtext (mt);
930 private MInterval graft (MInterval interval, bool forward, out int len)
937 i = interval.LeftMost;
942 len += i.Length - i.RightLength;
943 i = i.delete_node_forward ();
948 i = interval.RightMost;
953 len += i.Length - i.LeftLength;
954 i = i.delete_node_backward ();
960 for (MInterval prev = this, ii = this.Parent; ii != null;
961 prev = ii, ii = ii.Parent)
971 while (i.Parent != null) i = i.Parent;
975 public void Insert (int pos, MInterval interval)
978 M17N.DebugPrint ("insert({0}) at {1} in ", interval.Length, pos);
979 DumpOne (false, true);
981 interval.set_mtext (mtext);
984 Prev.Insert (pos, interval);
985 else if (pos == From)
987 MInterval prev = Prev;
993 prev.Insert (pos, interval);
996 prev.remove_properties
997 (MTextProperty.Flag.Sensitive|MTextProperty.Flag.RearSticky);
998 interval.inherit_front_properties (prev.Stack);
1001 (MTextProperty.Flag.Sensitive|MTextProperty.Flag.FrontSticky);
1002 interval.inherit_rear_properties (Stack);
1005 interval = graft (interval, false, out len);
1006 if (interval != null && prev != null)
1007 interval = prev.graft (interval, true, out len);
1008 if (interval != null)
1014 // .-this-. ==> .-this-.
1026 interval.Parent = i;
1027 for (; i != null; i = i.Parent)
1028 i.Length += interval.Length;
1033 remove_properties (MTextProperty.Flag.Sensitive);
1036 interval = graft (interval, true, out len);
1038 if (interval != null)
1039 interval = graft (interval, false, out len);
1040 if (interval != null)
1043 Right.Left = interval;
1044 interval.Parent = Right;
1045 for (MInterval i = Right; i != null; i = i.Parent)
1046 i.Length += interval.Length;
1051 MInterval next = Next;
1057 next.Insert (pos, interval);
1060 next.remove_properties
1061 (MTextProperty.Flag.Sensitive|MTextProperty.Flag.FrontSticky);
1062 interval.inherit_rear_properties (next.Stack);
1065 (MTextProperty.Flag.Sensitive|MTextProperty.Flag.RearSticky);
1066 interval.inherit_front_properties (Stack);
1069 interval = graft (interval, true, out len);
1070 if (interval != null && next != null)
1071 interval = next.graft (interval, false, out len);
1072 if (interval != null)
1078 // .-this-. ==> .-this-.
1091 interval.Parent = i;
1092 for (; i != null; i = i.Parent)
1093 i.Length += interval.Length;
1097 Next.Insert (pos, interval);
1100 private void vacate_node (MInterval interval)
1102 M17N.DebugPrint ("vacate #{0} to #{1}", ID, interval.ID);
1103 if (interval != null)
1104 interval.Parent = Parent;
1108 mtext.intervals.Put (Key, interval);
1112 if (this == Parent.Right)
1113 Parent.Right = interval;
1115 Parent.Left = interval;
1118 if (interval != null)
1119 diff -= interval.Length;
1120 for (MInterval i = Parent; i != null; i = i.Parent)
1125 public void Delete (int start, int end)
1128 M17N.DebugPrint ("delete({0} {1}) from ", start, end); DumpOne (false, true);
1133 Left.Delete (start, end);
1136 Left.Delete (start, From);
1138 end -= From - start;
1145 Right.Delete (start, end);
1148 Right.Delete (To, end);
1151 if (start == From && end == To)
1163 for (i = Right; i.Left != null; i = i.Left)
1164 i.Length += Left.Length;
1165 i.Length += Left.Length;
1169 vacate_node (Right);
1174 int len = end - start;
1176 for (MInterval i = this; i != null; i = i.Parent)
1181 public void Push (int start, int end, MTextProperty prop)
1184 M17N.DebugPrint ("push({0} {1}) at ", start, end); DumpOne (false, true);
1189 Left.Push (start, end, prop);
1192 Left.Push (start, From, prop);
1199 Right.Push (start, end, prop);
1202 Right.Push (To, end, prop);
1207 divide_left (start);
1210 Stack.Push (prop.key, prop);
1213 private bool try_merge_prev ()
1215 MInterval prev = Prev;
1217 if (! mergeable (prev))
1220 int len = prev.Length - prev.LeftLength;
1222 // PREV is Left, Left.Right, ..., or Left....Right.
1225 prev.Parent.Right = prev.Left;
1226 while (prev.Parent != Left)
1233 if (Left.Length == Left.LeftLength)
1238 private bool try_merge_next ()
1240 MInterval next = Next;
1242 if (! mergeable (next))
1245 int len = next.Length - next.LeftLength;
1247 // NEXT is Right, Right.Left, ..., or Right....Left.
1250 next.Parent.Left = next.Right;
1251 while (next.Parent != Right)
1257 Right.Length -= len;
1258 if (Right.Length == Right.LeftLength)
1265 public void Pop (int start, int end)
1268 M17N.DebugPrint ("pop({0} {1}) at ", start, end); DumpOne (false, true);
1273 Left.Pop (start, end);
1276 Left.Pop (start, From);
1283 Right.Pop (start, end);
1286 Right.Pop (To, end);
1290 if (! Stack.IsEmpty)
1292 bool check_prev = start == From && start > 0;
1293 bool check_next = end == To && end < mtext.Length;
1296 divide_left (start);
1300 if (check_prev && Left != null)
1301 check_prev = try_merge_prev () && (Left != null);
1302 if (check_next && Right != null)
1303 check_next = try_merge_next () && (Right != null);
1306 if (Prev.try_merge_next () && check_next)
1307 Prev.try_merge_next ();
1309 else if (check_next)
1311 Next.try_merge_prev ();
1316 private void DumpOne (bool with_prop, bool newline)
1318 DumpOne (with_prop, newline, false);
1321 private void DumpOne (bool with_prop, bool newline, bool force)
1323 if (force || M17N.debug)
1325 Console.Write ("#{0}({1} {2} {3}", ID, Length, From, To);
1327 foreach (MPlist p in Stack)
1328 Console.Write (" " + p.Val);
1329 Console.Write (")");
1331 Console.WriteLine ();
1335 public void Dump () { Dump (false); }
1337 public void Dump (bool force)
1339 if (force || M17N.debug)
1346 Console.Write (" ");
1347 DumpOne (true, false, force);
1353 public void DumpNested (bool force)
1355 if (force || M17N.debug)
1359 Console.Write ("#{0}({1} {2} {3}", ID, Length, From, To);
1360 foreach (MPlist p in Stack)
1361 Console.Write (" " + p.Val);
1364 Console.Write (" left=");
1365 Left.DumpNested (force);
1369 Console.Write (" right=");
1370 Right.DumpNested (force);
1372 Console.Write (")");
1377 private class MTextEnum : IEnumerator
1380 private int pos = -1;
1382 public MTextEnum (MText mt)
1387 public bool MoveNext ()
1390 return (pos < mt.nchars);
1393 public void Reset ()
1398 public object Current
1401 //if (pos < 0 || pos >= mt.nchars)
1402 //throw new InvalidOperationException ();