*** empty log message ***

diff --git a/MPlist.cs b/MPlist.cs
index 0b077a4..ca6022a 100644 (file)
--- a/MPlist.cs
+++ b/MPlist.cs
@@ -56,7 +56,7 @@ namespace M17N.Core
        return str + ")";
     }
 
-    public MPlist Find (MSymbol key)
+    private MPlist find (MSymbol key)
     {
       MPlist p;
 
@@ -66,9 +66,16 @@ namespace M17N.Core
       return p;
     }
 
+    public MPlist Find (MSymbol key)
+    {
+      MPlist p = find (key);
+
+      return (p.IsEmpty ? null : p);
+    }
+
     public object Get (MSymbol key)
     {
-      return Find (key).Val;
+      return find (key).Val;
     }
 
     public MPlist Set (MSymbol key, object val)
@@ -82,7 +89,7 @@ namespace M17N.Core
 
     public MPlist Put (MSymbol key, object val)
     {
-      return Find (key).Set (key, val);
+      return find (key).Set (key, val);
     }
 
     public MPlist Push (MSymbol key, object val)

diff --git a/MText.cs b/MText.cs
index cfa688b..cbf5c8a 100644 (file)
--- a/MText.cs
+++ b/MText.cs
@@ -239,11 +239,12 @@ namespace M17N.Core
        throw new Exception ("Invalid MText position:" + pos);
     }
 
-    private void check_range (int from, int to, bool zero_ok)
+    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)
@@ -265,7 +266,7 @@ namespace M17N.Core
          MPlist p = mt2.intervals.Find (plist.Key);
          MInterval interval;
 
-         if (p.IsEmpty)
+         if (p == null)
            interval = new MInterval (plist.Key, to - from);
          else
            interval = ((MInterval) p.Val).copy (from, to);
@@ -321,7 +322,8 @@ namespace M17N.Core
 
     public MText Del (int from, int to)
     {
-      check_range (from, to, true);
+      if (check_range (from, to, true))
+       return this;
 
       sb.Remove (from, pos_to_idx (this, to) - pos_to_idx (this, from));
       nchars -= to - from;
@@ -373,9 +375,8 @@ namespace M17N.Core
 
     public void PushProp (int from, int to, MSymbol key, object val)
     {
-      check_range (from, to, false);
-
-      PushProp (from, to, new MTextProperty (key, val));
+      if (! check_range (from, to, true))
+       PushProp (from, to, new MTextProperty (key, val));
     }
 
     public void PushProp (int from, int to, MTextProperty prop)
@@ -388,17 +389,47 @@ namespace M17N.Core
        }
       else
        {
-         MInterval root = (MInterval) intervals.Find (prop.key).Val;
+         if (check_range (from, to, true))
+           return;
 
-         if (root == null)
+         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 ("(");
@@ -744,7 +775,7 @@ namespace M17N.Core
 
                if ((prop.flags & MTextProperty.Flag.RearSticky)
                    == MTextProperty.Flag.RearSticky)
-                 i.stack.Push (prop.key, prop);
+                 i.stack.Add (prop.key, prop);
              }
          }
       }
@@ -761,7 +792,7 @@ namespace M17N.Core
 
                if ((prop.flags & MTextProperty.Flag.FrontSticky)
                    == MTextProperty.Flag.FrontSticky)
-                 i.stack.Push (prop.key, prop);
+                 i.stack.Add (prop.key, prop);
              }
          }
       }
@@ -974,6 +1005,41 @@ namespace M17N.Core
        stack.Push (prop.key, prop);
       }
 
+      public void Pop (int start, int end)
+      {
+       update_from_to ();
+       Console.Write ("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)
+         {
+           if (start > from)
+             divide_left (start);
+           if (end < to)
+             divide_right (end);
+           stack.Pop ();
+         }
+      }
+
       private void DumpOne (bool with_prop, bool newline)
       {
        Console.Write ("#{0}({1} {2} {3}", id, total_length, from, to);