using System.Text;
using System.Collections;
using System.Collections.Generic;
+using M17N;
using M17N.Core;
namespace M17N.Core
{
#if false
public enum MTextFormat
- {
- MTEXT_FORMAT_US_ASCII,
- MTEXT_FORMAT_UTF_8,
- MTEXT_FORMAT_UTF_16BE,
- MTEXT_FORMAT_UTF_16LE,
- MTEXT_FORMAT_UTF_32BE,
- MTEXT_FORMAT_UTF_32LE,
- }
+ {
+ MTEXT_FORMAT_US_ASCII,
+ MTEXT_FORMAT_UTF_8,
+ MTEXT_FORMAT_UTF_16BE,
+ MTEXT_FORMAT_UTF_16LE,
+ MTEXT_FORMAT_UTF_32BE,
+ MTEXT_FORMAT_UTF_32LE,
+ }
#endif
public class MTextProperty
{
- internal MProperty prop;
- internal bool front_sticky;
- internal bool rear_sticky;
- internal bool merginable;
- public MProperty Prop { get { return prop; } }
- public bool FrontSticky { get { return front_sticky; } }
- public bool RearSticky { get { return rear_sticky; } }
- public bool Merginable { get { return merginable; } }
+ internal MSymbol key;
+ internal object val;
+
+ [FlagsAttribute]
+ internal enum Flag : byte
+ {
+ None = 0,
+ FrontSticky = 1,
+ RearSticky = 2,
+ Sensitive = 4
+ };
+ internal Flag flags;
+
+ public MSymbol Key { get { return key; } }
+ public object Val { get { return val; } }
+ public bool FrontSticky
+ {
+ get { return (flags & Flag.FrontSticky) != Flag.None; }
+ }
+ public bool RearSticky
+ {
+ get { return (flags & Flag.RearSticky) != Flag.None; }
+ }
+ public bool Sensitive
+ {
+ get { return (flags & Flag.Sensitive) != Flag.None; }
+ }
- public MTextProperty (bool front_sticky, bool rear_sticky)
+ public MTextProperty (MSymbol key, object val)
{
- this.front_sticky = front_sticky;
- this.rear_sticky = rear_sticky;
+ this.key = key;
+ this.val = val;
+ flags |= Flag.RearSticky;
}
- public MTextProperty (bool front_sticky, bool rear_sticky, bool merginable)
+
+ public MTextProperty (MSymbol key, object val,
+ bool front_sticky, bool rear_sticky, bool sensitive)
{
- this.front_sticky = front_sticky;
- this.rear_sticky = rear_sticky;
- this.merginable = merginable;
+ this.key = key;
+ this.val = val;
+ if (front_sticky)
+ flags |= Flag.FrontSticky;
+ if (rear_sticky)
+ flags |= Flag.RearSticky;
+ if (sensitive)
+ flags |= Flag.Sensitive;
+ }
+
+ public override string ToString ()
+ {
+ return key.ToString () + ":" + val;
}
}
- public class MText
+ public class MText : IEnumerable, IEquatable<MText>, IComparable<MText>
{
#if false
public enum MTextFormat format;
#endif
-
private StringBuilder sb;
private int nchars;
private int cache_pos;
private int cache_idx;
- private MInterval root_interval;
- private bool unmodifiable;
+ private MPlist intervals;
+ private MPlist default_property;
+ private bool read_only;
private static UTF8Encoding utf8 = new UTF8Encoding ();
{
int len = str.Length, n = 0;
- for (int i = 0; i < len; i++)
- n += surrogate_high_p (str[i]) ? 2 : 1;
+ for (int i = 0; i < len; i++, n++)
+ if (surrogate_high_p (str[i]))
+ i++;
return n;
}
{
int len = str.Length, n = 0;
- for (int i = 0; i < len; i++)
- n += surrogate_high_p (str[i]) ? 2 : 1;
+ for (int i = 0; i < len; i++, n++)
+ if (surrogate_high_p (str[i]))
+ i++;
return n;
}
public MText ()
- {
- sb = new StringBuilder ();
- }
+ {
+ sb = new StringBuilder ();
+ intervals = new MPlist ();
+ }
public MText (byte[] str)
- {
- sb = new StringBuilder (utf8.GetString (str));
- nchars = count_chars (sb);
- }
+ {
+ sb = new StringBuilder (utf8.GetString (str));
+ nchars = count_chars (sb);
+ intervals = new MPlist ();
+ }
public MText (String str)
- {
- sb = new StringBuilder (str);
- nchars = count_chars (str);
- }
+ {
+ sb = new StringBuilder (str);
+ nchars = count_chars (str);
+ intervals = new MPlist ();
+ }
public MText (StringBuilder str)
- {
- sb = str;
- nchars = count_chars (str);
- }
+ {
+ sb = str;
+ nchars = count_chars (str);
+ intervals = new MPlist ();
+ }
public static MText operator+ (MText mt1, MText mt2)
{
- MText mt = new MText (mt1.sb);
+ MText mt = new MText ();
+ mt.sb.Append (mt1.sb);
mt.sb.Append (mt2.sb);
mt.nchars = mt1.nchars + mt2.nchars;
return mt;
}
- public override string ToString ()
+ // Public properties
+ public bool ReadOnly { get { return read_only; } }
+ public int Length { get { return nchars; } }
+
+ // Public methods
+
+ // for IEnumerable interface
+ public IEnumerator GetEnumerator() { return new MTextEnum (this); }
+
+ // for IEquatable interface
+ public bool Equals (MText other) { return this.sb.Equals (other.sb); }
+
+ // for IComparable interface
+ public int CompareTo (MText other)
{
- return sb.ToString ();
+ return this.sb.ToString ().CompareTo (other.sb.ToString ());
}
+ public override String ToString () { return "\"" + sb.ToString () + "\""; }
+
private static bool surrogate_high_p (char c)
{
return (c >= 0xD800 && c < 0xDC00);
return i;
}
+ private void check_pos (int pos, bool tail_ok)
+ {
+ if (pos < 0 || (tail_ok ? pos > nchars : pos >= nchars))
+ throw new Exception ("Invalid MText position:" + pos);
+ }
+
+ private bool check_range (int from, int to, bool zero_ok)
+ {
+ if (from < 0 || (zero_ok ? from > to : from >= to)
+ || to > nchars)
+ throw new Exception ("Invalid MText range");
+ return (from == to);
+ }
+
private void insert (int pos, MText mt2, int from, int to)
{
+ check_pos (pos, true);
+
int pos_idx = pos_to_idx (this, pos);
int from_idx = pos_to_idx (mt2, from);
int to_idx = pos_to_idx (mt2, to);
sb.Insert (pos_idx, mt2.sb.ToString (from_idx, to_idx - from_idx));
nchars += to - from;
+
+ foreach (MPlist plist in mt2.intervals)
+ if (intervals.Find (plist.Key) == null)
+ intervals.Push (plist.Key, new MInterval (plist.Key, this));
+ foreach (MPlist plist in intervals)
+ {
+ MPlist p = mt2.intervals.Find (plist.Key);
+ MInterval interval;
+
+ if (p == null)
+ interval = new MInterval (plist.Key, this, to - from);
+ else
+ interval = ((MInterval) p.Val).Copy (from, to);
+ ((MInterval) plist.Val).Insert (pos, interval);
+ }
+ }
+
+ private void insert (int pos, int c)
+ {
+ check_pos (pos, true);
+
+ int pos_idx = pos_to_idx (this, pos);
+
+ if (c < 0x10000)
+ {
+ char ch = (char) c;
+ sb.Insert (pos_idx, ch);
+ }
+ else
+ {
+ char high = (char) (0xD800 + ((c - 0x10000) >> 10));
+ char low = (char) (0xDC00 + ((c - 0x10000) & 0x3FF));
+ sb.Insert (pos_idx, low);
+ sb.Insert (pos_idx, high);
+ }
+ nchars++;
+ foreach (MPlist plist in intervals)
+ ((MInterval) plist.Val).Insert (pos,
+ new MInterval (plist.Key, this, 1));
}
public int this[int i]
}
}
- public MText dup ()
+ public MText Dup ()
{
- return (new MText (sb.ToString ()));
+ MText mt = new MText (sb.ToString ());
+
+ foreach (MPlist p in intervals)
+ mt.intervals.Add (p.Key, ((MInterval) p.Val).Copy (0, Length));
+ return mt;
}
- public MText ins (int pos, MText mt)
+ public MText Ins (int pos, int c)
+ {
+ insert (pos, c);
+ return this;
+ }
+
+ public MText Ins (int pos, MText mt)
{
insert (pos, mt, 0, mt.nchars);
return this;
}
- public MText ins (int pos, MText mt, int from, int to)
+ public MText Ins (int pos, MText mt, int from, int to)
{
insert (pos, mt, from, to);
return this;
}
- public MText del (int from, int to)
+ public MText Cat (int c)
+ {
+ insert (nchars, c);
+ return this;
+ }
+
+ public MText Del (int from, int to)
{
+ if (check_range (from, to, true))
+ return this;
+
sb.Remove (from, pos_to_idx (this, to) - pos_to_idx (this, from));
nchars -= to - from;
+
+ if (nchars > 0)
+ foreach (MPlist plist in intervals)
+ ((MInterval) plist.Val).Delete (from, to);
+ else
+ intervals = new MPlist ();
return this;
}
- private class MInterval
+ public object GetProp (int pos, MSymbol key)
{
- // Start and end positions of the MText covered of this interval
- // and its children. The values are actually (4N +- 1), where N
- // is a non-negative integer representing a position relative to
- // the parent interval.
- private int total_start, total_end;
- // Stack of MTextProperty
- private Stack<MTextProperty> stack;
- // Number of child nodes
- private int nodes;
- private MInterval left, right, parent;
-
- private int Start {
- get {
- return (left == null ? total_start : total_start + left.total_end);
+ check_pos (pos, false);
+
+ MInterval i = (MInterval) intervals.Get (key);
+ if (i == null)
+ return null;
+
+ MTextProperty prop = i.Get (pos);
+ return (prop != null ? prop.Val : null);
+ }
+
+ public object GetProp (int pos, MSymbol key, out MTextProperty prop)
+ {
+ check_pos (pos, false);
+
+ MInterval i = (MInterval) intervals.Get (key);
+ if (i == null)
+ return (prop = null);
+ prop = i.Get (pos);
+ return (prop != null ? prop.Val : null);
+ }
+
+ public object GetProp (int pos, MSymbol key, out MTextProperty[] array)
+ {
+ check_pos (pos, false);
+
+ MInterval i = (MInterval) intervals.Get (key);
+ if (i == null)
+ return (array = null);
+ MTextProperty prop = i.Get (pos, out array);
+ return (prop != null ? prop.Val : null);
+ }
+
+ public void PushProp (int from, int to, MSymbol key, object val)
+ {
+ if (! check_range (from, to, true))
+ PushProp (from, to, new MTextProperty (key, val));
+ }
+
+ public void PushProp (int from, int to, MTextProperty prop)
+ {
+ if (from < 0)
+ {
+ if (default_property == null)
+ default_property = new MPlist ();
+ default_property.Push (prop.key, prop.val);
}
- }
+ else
+ {
+ if (check_range (from, to, true))
+ return;
- private int End {
- get {
- return (right == null ? total_end : total_start + right.total_start);
+ MPlist p = intervals.Find (prop.key);
+ MInterval root;
+
+ if (p == null)
+ {
+ root = new MInterval (prop.key, this);
+ intervals.Push (prop.key, root);
+ }
+ else
+ root = (MInterval) p.Val;
+
+ root.Push (from, to, prop);
+ }
+ }
+
+ public void PopProp (int from, int to, MSymbol key)
+ {
+ if (from < 0)
+ {
+ if (default_property == null)
+ return;
+ MPlist p = default_property.Find (key);
+
+ if (p != null)
+ p.Pop ();
+ }
+ else
+ {
+ if (check_range (from, to, true))
+ return;
+
+ MPlist p = intervals.Find (key);
+
+ if (p != null)
+ ((MInterval) p.Val).Pop (from, to);
}
+ }
+
+ public void DumpProp ()
+ {
+ Console.Write ("(");
+ foreach (MPlist p in intervals)
+ ((MInterval) p.Val).Dump (true);
+ Console.WriteLine (")");
+ }
+
+ public void DumpPropNested ()
+ {
+ Console.Write ("(");
+ foreach (MPlist p in intervals)
+ ((MInterval) p.Val).DumpNested (true);
+ Console.WriteLine (")");
+ }
+
+ private class MInterval
+ {
+ // position: 0 1 2 3 4 5 6 7
+ // | A | B | C | D | E F | G |
+ // interval |---|---|---|<->|-------|---|
+ // |---|<->|---| |<----->|---|
+ // |<->| |<->| |<->|
+ //
+ // [7 (3 4)]
+ // [3 (1 2)] [3 (4 6)]
+ // [1 (0 1)] [2 (2 3)] [1 (6 7)]
+ //
+ private static int count = 0;
+ private int ID;
+ private int Length;
+ private int From, To;
+ private MSymbol Key;
+ private MPlist Stack;
+ private MInterval Left, Right, Parent;
+ private MText mtext;
+
+ public MInterval (MSymbol key, MText mt, int length)
+ {
+ if (length <= 0)
+ throw new Exception ("Invalid interval length");
+ Key = key;
+ mtext = mt;
+ Length = length;
+ Stack = new MPlist ();
+ ID = count++;
+ }
+
+ public MInterval (MSymbol key, MText mt)
+ {
+ Key = key;
+ mtext = mt;
+ Length = mt.sb.Length;
+ From = 0;
+ To = Length;
+ Stack = new MPlist ();
+ ID = count++;
+ }
+
+ public MTextProperty Get (int pos)
+ {
+ MInterval i = find (pos);
+
+ return (i.Stack.IsEmpty ? null : (MTextProperty) i.Stack.Val);
+ }
+
+ public MTextProperty Get (int pos, out MTextProperty[] array)
+ {
+ MInterval i = find (pos);
+
+ if (i.Stack.IsEmpty)
+ {
+ array = null;
+ return null;
+ }
+ array = new MTextProperty[i.Stack.Count];
+
+ int idx;
+ MPlist p;
+ for (idx = 0, p = i.Stack; ! p.IsEmpty; idx++, p = p.Next)
+ array[idx] = (MTextProperty) p.Val;
+ return array[idx - 1];
+ }
+
+ private MInterval (MSymbol key, MText mt, int length, MPlist stack)
+ {
+ Key = key;
+ mtext = mt;
+ Length = length;
+ From = 0;
+ To = Length;
+ Stack = stack.Clone ();
+ ID = count++;
+ }
+
+ private void update_from_to ()
+ {
+ if (Parent == null)
+ {
+ From = LeftLength;
+ To = Length - RightLength;
+ }
+ else if (Parent.Left == this)
+ {
+ From = Parent.From - Length + LeftLength;
+ To = Parent.From - RightLength;
+ }
+ else
+ {
+ From = Parent.To + LeftLength;
+ To = Parent.To + Length - RightLength;
+ }
+ }
+
+ private int LeftLength
+ {
+ get { return (Left == null ? 0 : Left.Length); }
+ }
+
+ private int RightLength
+ {
+ get { return (Right == null ? 0 : Right.Length); }
}
- private MInterval Left {
+ private MInterval LeftMost
+ {
+ get { return (Left == null ? this : Left.LeftMost); }
+ }
+
+ private MInterval RightMost
+ {
+ get { return (Right == null ? this : Right.RightMost); }
+ }
+
+ private MInterval Prev {
get {
- MInterval interval;
+ MInterval i;
- if (left != null)
- {
- for (interval = left; interval.right != null;
- interval = interval.right);
- }
+ if (Left != null)
+ for (i = Left; i.Right != null; i = i.Right);
else
{
- for (interval = parent;
- interval != null && interval.total_start == total_start;
- interval = interval.parent);
+ MInterval child = this;
+ for (i = Parent; i != null && i.Left == child;
+ child = i, i = i.Parent);
}
- return interval;
+ return i;
}
}
- private MInterval Right {
+ private MInterval Next {
get {
- MInterval interval;
+ MInterval i;
- if (right != null)
- {
- for (interval = right; interval.left != null;
- interval = interval.left);
- }
+ if (Right != null)
+ for (i = Right; i.Left != null; i = i.Left);
else
{
- for (interval = parent;
- interval != null && interval.total_end == total_end;
- interval = interval.parent);
+ MInterval child = this;
+ for (i = Parent; i != null && i.Right == child;
+ child = i, i = i.Parent);
}
- return interval;
+ return i;
}
}
- private static int MakePosition (int pos, bool front_inclusive)
+ private MInterval find (int pos)
{
- return (pos << 2) + (front_inclusive ? -1 : 1);
+ update_from_to ();
+ if (pos < From)
+ return Left.find (pos);
+ if (pos >= To)
+ return Right.find (pos);
+ return this;
}
- private MInterval (int start, int end)
+ private bool mergeable (MInterval i)
{
- if (start > end)
- throw new Exception ("Invalid Interval Range");
- this.total_start = (start << 2) + 1;
- this.total_end = (end << 2) + -1;
- this.stack = new Stack<MTextProperty> ();
- this.nodes = 1;
+ MPlist p1, p2;
+
+ for (p1 = Stack, p2 = i.Stack; ! p1.IsEmpty && ! p2.IsEmpty;
+ p1 = p1.Next, p2 = p2.Next)
+ if (p1.Val != p2.Val)
+ return false;
+ return (p1.IsEmpty && p2.IsEmpty);
}
- public MInterval (int start, bool front_inclusive,
- int end, bool rear_inclusive)
+ // p-. or .-p p-. or .-p
+ // .-this-. .-right-.
+ // left .-right-. -> .-this-. c2
+ // c1 c2 left c1
+ private MInterval promote_right ()
{
- if (start > end)
- throw new Exception ("Invalid Interval Range");
- this.total_start = (start << 2) + (front_inclusive ? -1 : 1);
- this.total_end = (end << 2) + (rear_inclusive ? 1 : -1);
- this.stack = new Stack<MTextProperty> ();
- this.nodes = 1;
+ int right_length = Right.Length;
+ MInterval c1;
+
+ if (Parent == null)
+ mtext.intervals.Put (Key, Right);
+ else if (Parent.Left == this)
+ Parent.Left = Right;
+ else
+ Parent.Right = Right;
+ Right.Parent = Parent;
+ c1 = Right.Left;
+ Right.Left = this;
+
+ Parent = Right;
+ Right = c1;
+ Parent.Length += Length;
+ Length -= right_length;
+ if (c1 != null)
+ {
+ c1.Parent = this;
+ Parent.Length -= c1.Length;
+ Length += c1.Length;
+ }
+ return Parent;
}
- public void Push (MTextProperty prop, int start, int end)
+ // p-. or .-p p-. or .-p
+ // .-this-. .-left-.
+ // .-left-. .-right-. -> c1 .-this-.
+ // c1 c2 c2 right
+ private MInterval promote_left ()
{
- start <<= 2;
- if (prop.FrontSticky)
- start--;
- else
- start++;
- end <<= 2;
- if (prop.RearSticky)
- end++;
+ int left_length = Left.Length;
+ MInterval c1;
+
+ if (Parent == null)
+ mtext.intervals.Put (Key, Left);
+ else if (Parent.Left == this)
+ Parent.Left = Left;
else
- end--;
- if (start >= end)
- throw new Exception ("Invalid Text Property Range");
+ Parent.Right = Left;
+ Left.Parent = Parent;
+ c1 = Left.Left;
+ Left.Right = this;
+
+ Parent = Left;
+ Left = c1;
+ Parent.Length += Length;
+ Length -= left_length;
+ if (c1 != null)
+ {
+ c1.Parent = this;
+ Parent.Length -= c1.Length;
+ Length += c1.Length;
+ }
+ return Parent;
+ }
+
+ private MInterval balance ()
+ {
+ MInterval i = this;
+
+ while (true)
+ {
+ // .-this-.
+ // .-left-. .-right-.
+ // c1 c2 c3 c4
+ int diff = i.LeftLength - i.RightLength;
+ int new_diff;
- push (prop, start, end);
+ if (diff > 0)
+ {
+ new_diff = (i.Length - i.LeftLength
+ + i.Left.RightLength - i.Left.LeftLength);
+ if (Math.Abs (new_diff) >= diff)
+ break;
+ i = i.promote_left ();
+ i.Right.balance ();
+ }
+ else if (diff < 0)
+ {
+ new_diff = (i.Length - i.RightLength
+ + i.Right.LeftLength - i.Right.RightLength);
+ if (Math.Abs (new_diff) >= diff)
+ break;
+ i = i.promote_right ();
+ i.Left.balance ();
+ }
+ }
+ return i;
}
+ public MInterval Copy (int start, int end)
+ {
+ MInterval copy, left_copy = null, right_copy = null;
+
+ update_from_to ();
+
+ if (start < From)
+ {
+ if (end <= From)
+ return Left.Copy (start, end);
+ left_copy = Left.Copy (start, From);
+ }
+ if (end > To)
+ {
+ if (start >= To)
+ return Right.Copy (start, end);
+ right_copy = Right.Copy (To, end);
+ }
+
+ copy = new MInterval (Key, null, end - start, Stack);
+ remove_properties (MTextProperty.Flag.Sensitive);
+ if (left_copy != null)
+ {
+ copy.Left = left_copy;
+ left_copy.Parent = copy;
+ }
+ if (right_copy != null)
+ {
+ copy.Right = right_copy;
+ right_copy.Parent = copy;
+ }
+ return copy;
+ }
+
+ // this-. ==> this-.
+ // right newright-.
+ // right
private MInterval divide_right (int pos)
{
- MInterval interval = new MInterval (pos, End);
+ MInterval interval = new MInterval (Key, mtext, To - pos, Stack);
+ M17N.DebugPrint ("divide-right({0}) at ", pos); DumpOne (false, true);
+ To = pos;
+ if (Right != null)
+ {
+ interval.Right = Right;
+ Right.Parent = interval;
+ interval.Length += Right.Length;
+ }
+ interval.Parent = this;
+ Right = interval;
return interval;
}
+ // .-this ==> .-this
+ // left .-newleft
+ // left
private MInterval divide_left (int pos)
{
- MInterval interval = new MInterval (Start, pos);
+ MInterval interval = new MInterval (Key, mtext, pos - From, Stack);
+ M17N.DebugPrint ("divide-left({0}) at ", pos); DumpOne (false, true);
+ From = pos;
+ if (Left != null)
+ {
+ interval.Left = Left;
+ Left.Parent = interval;
+ interval.Length += Left.Length;
+ }
+ interval.Parent = this;
+ Left = interval;
return interval;
}
- private void push (MTextProperty prop, int start, int end)
+ private void remove_properties (MTextProperty.Flag flags)
{
- int this_start = Start;
- int this_end = End;
+ for (MPlist p = Stack; ! p.IsEmpty;)
+ {
+ MTextProperty prop = (MTextProperty) p.Val;
- if (start < this_start)
+ if ((prop.flags & flags) == flags)
+ p.Pop ();
+ else
+ p = p.Next;
+ }
+ }
+
+ private void inherit_front_properties (MPlist plist)
+ {
+ for (MInterval i = LeftMost; i != null; i = i.Next)
+ {
+ if (! Stack.IsEmpty)
+ break;
+ for (MPlist p = plist; ! p.IsEmpty; p = p.Next)
+ {
+ MTextProperty prop = (MTextProperty) p.Val;
+
+ if ((prop.flags & MTextProperty.Flag.RearSticky)
+ == MTextProperty.Flag.RearSticky)
+ i.Stack.Add (prop.key, prop);
+ }
+ }
+ }
+
+ private void inherit_rear_properties (MPlist plist)
+ {
+ for (MInterval i = RightMost; i != null; i = i.Prev)
+ {
+ if (! Stack.IsEmpty)
+ break;
+ for (MPlist p = plist; ! p.IsEmpty; p = p.Next)
+ {
+ MTextProperty prop = (MTextProperty) p.Val;
+
+ if ((prop.flags & MTextProperty.Flag.FrontSticky)
+ == MTextProperty.Flag.FrontSticky)
+ i.Stack.Add (prop.key, prop);
+ }
+ }
+ }
+
+ private MInterval delete_node_forward ()
+ {
+ if (Parent != null)
+ {
+ int len = Length - RightLength;
+
+ for (MInterval i = Parent; i != null; i = i.Parent)
+ i.Length -= len;
+ if (Parent.Left == this)
+ Parent.Left = Right;
+ else
+ Parent.Right = Right;
+ }
+
+ if (Right != null)
+ {
+ Right.Parent = Parent;
+ return Right.LeftMost;
+ }
+ return Parent;
+ }
+
+ private MInterval delete_node_backward ()
+ {
+ if (Parent != null)
{
- if (end <= this_start)
- Left.push (prop, start, end);
+ int len = Length - RightLength;
+
+ for (MInterval i = Parent; i != null; i = i.Parent)
+ i.Length -= len;
+ if (Parent.Left == this)
+ Parent.Left = Left;
else
+ Parent.Right = Left;
+ }
+
+ if (Left != null)
+ {
+ Left.Parent = Parent;
+ return Left.RightMost;
+ }
+ return Parent;
+ }
+
+ private void set_mtext (MText mt)
+ {
+ mtext = mt;
+ if (Left != null)
+ Left.set_mtext (mt);
+ if (Right != null)
+ Right.set_mtext (mt);
+ }
+
+ private MInterval graft (MInterval interval, bool forward, out int len)
+ {
+ MInterval i;
+
+ len = 0;
+ if (forward)
+ {
+ i = interval.LeftMost;
+ while (i != null)
+ {
+ if (! mergeable (i))
+ break;
+ len += i.Length - i.RightLength;
+ i = i.delete_node_forward ();
+ }
+ }
+ else
+ {
+ i = interval.RightMost;
+ while (i != null)
+ {
+ if (! mergeable (i))
+ break;
+ len += i.Length - i.LeftLength;
+ i = i.delete_node_backward ();
+ }
+ }
+
+ Length += len;
+ To += len;
+ for (MInterval prev = this, ii = this.Parent; ii != null;
+ prev = ii, ii = ii.Parent)
+ {
+ ii.Length += len;
+ if (prev == ii.Left)
+ {
+ ii.From += len;
+ ii.To += len;;
+ }
+ }
+ if (i != null)
+ while (i.Parent != null) i = i.Parent;
+ return i;
+ }
+
+ public void Insert (int pos, MInterval interval)
+ {
+ update_from_to ();
+ M17N.DebugPrint ("insert({0}) at {1} in ", interval.Length, pos);
+ DumpOne (false, true);
+
+ interval.set_mtext (mtext);
+
+ if (pos < From)
+ Prev.Insert (pos, interval);
+ else if (pos == From)
+ {
+ MInterval prev = Prev;
+
+ if (prev != null)
+ {
+ if (Left == null)
+ {
+ prev.Insert (pos, interval);
+ return;
+ }
+ prev.remove_properties
+ (MTextProperty.Flag.Sensitive|MTextProperty.Flag.RearSticky);
+ interval.inherit_front_properties (prev.Stack);
+ }
+ remove_properties
+ (MTextProperty.Flag.Sensitive|MTextProperty.Flag.FrontSticky);
+ interval.inherit_rear_properties (Stack);
+
+ int len;
+ interval = graft (interval, false, out len);
+ if (interval != null && prev != null)
+ interval = prev.graft (interval, true, out len);
+ if (interval != null)
+ {
+ MInterval i;
+
+ if (Left != null)
+ {
+ // .-this-. ==> .-this-.
+ // left-. .-left-.
+ // child child-.
+ // interval
+ i = Left.RightMost;
+ i.Right = interval;
+ }
+ else
+ {
+ Left = interval;
+ i = this;
+ }
+ interval.Parent = i;
+ for (; i != null; i = i.Parent)
+ i.Length += interval.Length;
+ }
+ }
+ else if (pos < To)
+ {
+ remove_properties (MTextProperty.Flag.Sensitive);
+
+ int len;
+ interval = graft (interval, true, out len);
+ pos += len;
+ if (interval != null)
+ interval = graft (interval, false, out len);
+ if (interval != null)
+ {
+ divide_right (pos);
+ Right.Left = interval;
+ interval.Parent = Right;
+ for (MInterval i = Right; i != null; i = i.Parent)
+ i.Length += interval.Length;
+ }
+ }
+ else if (pos == To)
+ {
+ MInterval next = Next;
+
+ if (next != null)
+ {
+ if (Right == null)
+ {
+ next.Insert (pos, interval);
+ return;
+ }
+ next.remove_properties
+ (MTextProperty.Flag.Sensitive|MTextProperty.Flag.FrontSticky);
+ interval.inherit_rear_properties (next.Stack);
+ }
+ remove_properties
+ (MTextProperty.Flag.Sensitive|MTextProperty.Flag.RearSticky);
+ interval.inherit_front_properties (Stack);
+
+ int len;
+ interval = graft (interval, true, out len);
+ if (interval != null && next != null)
+ interval = next.graft (interval, false, out len);
+ if (interval != null)
{
- Left.push (prop, start, this_start);
- if (end < this_end)
+ MInterval i;
+
+ if (Right != null)
{
- divide_right (end);
- stack.Push (prop);
+ // .-this-. ==> .-this-.
+ // .-right .-right
+ // child .-child
+ // interval
+
+ i = Right.LeftMost;
+ i.Left = interval;
}
else
{
- stack.Push (prop);
- if (this_end < end)
- Right.Push (prop, this_end, end);
+ Right = interval;
+ i = this;
}
+ interval.Parent = i;
+ for (; i != null; i = i.Parent)
+ i.Length += interval.Length;
}
}
- else if (start < this_end)
+ else // (pos > To)
+ Next.Insert (pos, interval);
+ }
+
+ private void vacate_node (MInterval interval)
+ {
+ M17N.DebugPrint ("vacate #{0} to #{1}", ID, interval.ID);
+ if (interval != null)
+ interval.Parent = Parent;
+ if (Parent == null)
{
- divide_right (start).Push (prop, start, end);
+ if (mtext != null)
+ mtext.intervals.Put (Key, interval);
}
else
- Right.Push (prop, start, end);
+ {
+ if (this == Parent.Right)
+ Parent.Right = interval;
+ else
+ Parent.Left = interval;
+
+ int diff = Length;
+ if (interval != null)
+ diff -= interval.Length;
+ for (MInterval i = Parent; i != null; i = i.Parent)
+ i.Length -= diff;
+ }
+ }
+
+ public void Delete (int start, int end)
+ {
+ update_from_to ();
+ M17N.DebugPrint ("delete({0} {1}) from ", start, end); DumpOne (false, true);
+ if (start < From)
+ {
+ if (end <= From)
+ {
+ Left.Delete (start, end);
+ return;
+ }
+ Left.Delete (start, From);
+ To -= From - start;
+ end -= From - start;
+ From = start;
+ }
+ if (end > To)
+ {
+ if (start >= To)
+ {
+ Right.Delete (start, end);
+ return;
+ }
+ Right.Delete (To, end);
+ end = To;
+ }
+ if (start == From && end == To)
+ {
+ if (Right == null)
+ {
+ vacate_node (Left);
+ }
+ else
+ {
+ if (Left != null)
+ {
+ MInterval i;
+
+ for (i = Right; i.Left != null; i = i.Left)
+ i.Length += Left.Length;
+ i.Length += Left.Length;
+ i.Left = Left;
+ Left.Parent = i;
+ }
+ vacate_node (Right);
+ }
+ }
+ else
+ {
+ int len = end - start;
+
+ for (MInterval i = this; i != null; i = i.Parent)
+ i.Length -= len;
+ }
+ }
+
+ public void Push (int start, int end, MTextProperty prop)
+ {
+ update_from_to ();
+ M17N.DebugPrint ("push({0} {1}) at ", start, end); DumpOne (false, true);
+ if (start < From)
+ {
+ if (end <= From)
+ {
+ Left.Push (start, end, prop);
+ return;
+ }
+ Left.Push (start, From, prop);
+ start = From;
+ }
+ if (end > To)
+ {
+ if (start >= To)
+ {
+ Right.Push (start, end, prop);
+ return;
+ }
+ Right.Push (To, end, prop);
+ end = To;
+ }
+
+ if (start > From)
+ divide_left (start);
+ if (end < To)
+ divide_right (end);
+ Stack.Push (prop.key, prop);
+ }
+
+ private bool try_merge_prev ()
+ {
+ MInterval prev = Prev;
+
+ if (! mergeable (prev))
+ return false;
+
+ int len = prev.Length - prev.LeftLength;
+
+ // PREV is Left, Left.Right, ..., or Left....Right.
+ if (prev != Left)
+ {
+ prev.Parent.Right = prev.Left;
+ while (prev.Parent != Left)
+ {
+ prev.Length -= len;
+ prev = prev.Parent;
+ }
+ }
+ Left.Length -= len;
+ if (Left.Length == Left.LeftLength)
+ Left = Left.Left;
+ return true;
+ }
+
+ private bool try_merge_next ()
+ {
+ MInterval next = Next;
+
+ if (! mergeable (next))
+ return false;
+
+ int len = next.Length - next.LeftLength;
+
+ // NEXT is Right, Right.Left, ..., or Right....Left.
+ if (next != Right)
+ {
+ next.Parent.Left = next.Right;
+ while (next.Parent != Right)
+ {
+ next.Length -= len;
+ next = next.Parent;
+ }
+ }
+ Right.Length -= len;
+ if (Right.Length == Right.LeftLength)
+ Right = Right.Left;
+
+ return true;
+ }
+
+
+ public void Pop (int start, int end)
+ {
+ update_from_to ();
+ M17N.DebugPrint ("pop({0} {1}) at ", start, end); DumpOne (false, true);
+ if (start < From)
+ {
+ if (end <= From)
+ {
+ Left.Pop (start, end);
+ return;
+ }
+ Left.Pop (start, From);
+ start = From;
+ }
+ if (end > To)
+ {
+ if (start >= To)
+ {
+ Right.Pop (start, end);
+ return;
+ }
+ Right.Pop (To, end);
+ end = To;
+ }
+
+ if (! Stack.IsEmpty)
+ {
+ bool check_prev = start == From && start > 0;
+ bool check_next = end == To && end < mtext.Length;
+
+ if (! check_prev)
+ divide_left (start);
+ if (! check_next)
+ divide_right (end);
+ Stack.Pop ();
+ if (check_prev && Left != null)
+ check_prev = try_merge_prev () && (Left != null);
+ if (check_next && Right != null)
+ check_next = try_merge_next () && (Right != null);
+ if (check_prev)
+ {
+ if (Prev.try_merge_next () && check_next)
+ Prev.try_merge_next ();
+ }
+ else if (check_next)
+ {
+ Next.try_merge_prev ();
+ }
+ }
+ }
+
+ private void DumpOne (bool with_prop, bool newline)
+ {
+ DumpOne (with_prop, newline, false);
+ }
+
+ private void DumpOne (bool with_prop, bool newline, bool force)
+ {
+ if (force || M17N.debug)
+ {
+ Console.Write ("#{0}({1} {2} {3}", ID, Length, From, To);
+ if (with_prop)
+ foreach (MPlist p in Stack)
+ Console.Write (" " + p.Val);
+ Console.Write (")");
+ if (newline)
+ Console.WriteLine ();
+ }
+ }
+
+ public void Dump () { Dump (false); }
+
+ public void Dump (bool force)
+ {
+ if (force || M17N.debug)
+ {
+ update_from_to ();
+
+ if (Left != null)
+ Left.Dump (force);
+ if (From > 0)
+ Console.Write (" ");
+ DumpOne (true, false, force);
+ if (Right != null)
+ Right.Dump (force);
+ }
+ }
+
+ public void DumpNested (bool force)
+ {
+ if (force || M17N.debug)
+ {
+ update_from_to ();
+
+ Console.Write ("#{0}({1} {2} {3}", ID, Length, From, To);
+ foreach (MPlist p in Stack)
+ Console.Write (" " + p.Val);
+ if (Left != null)
+ {
+ Console.Write (" left=");
+ Left.DumpNested (force);
+ }
+ if (Right != null)
+ {
+ Console.Write (" right=");
+ Right.DumpNested (force);
+ }
+ Console.Write (")");
+ }
+ }
+ }
+
+ private class MTextEnum : IEnumerator
+ {
+ private MText mt;
+ private int pos = -1;
+
+ public MTextEnum (MText mt)
+ {
+ this.mt = mt;
+ }
+
+ public bool MoveNext ()
+ {
+ pos++;
+ return (pos < mt.nchars);
+ }
+
+ public void Reset ()
+ {
+ pos = -1;
+ }
+
+ public object Current
+ {
+ get {
+ //if (pos < 0 || pos >= mt.nchars)
+ //throw new InvalidOperationException ();
+ return mt[pos];
+ }
}
}
}
projects / m17n / m17n-lib-cs.git / blobdiff