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//-----------------------------------------------------------------------
//
// Microsoft Windows Client Platform
// Copyright (C) Microsoft Corporation, 2002
//
// File: FamilyMapCollection.cs
//
// Contents: FontFamilyMapCollection
//
// Created: 2-5-05 Niklas Borson (niklasb)
//
//------------------------------------------------------------------------
using System;
using System.Globalization;
using SC=System.Collections;
using System.Collections.Generic;
using MS.Internal.FontFace;
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;
namespace System.Windows.Media
{
/// <summary>
/// List of FontFamilyMap objects in a FontFamily, in lookup order.
/// </summary>
public sealed class FontFamilyMapCollection : IList<FontFamilyMap>, SC.IList
{
private const int InitialCapacity = 8;
private CompositeFontInfo _fontInfo;
private FontFamilyMap[] _items;
private int _count;
internal FontFamilyMapCollection(CompositeFontInfo fontInfo)
{
_fontInfo = fontInfo;
_items = null;
_count = 0;
}
#region IEnumerable members
/// <summary>
/// Returns an enumerator for iterating through the list.
/// </summary>
public IEnumerator<FontFamilyMap> GetEnumerator()
{
return new Enumerator(_items, _count);
}
SC.IEnumerator SC.IEnumerable.GetEnumerator()
{
return new Enumerator(_items, _count);
}
#endregion
#region ICollection methods
/// <summary>
/// Adds a FontFamilyMap to the font family.
/// </summary>
public void Add(FontFamilyMap item)
{
InsertItem(_count, item);
}
/// <summary>
/// Removes all FontFamilyMap objects from the FontFamily.
/// </summary>
public void Clear()
{
ClearItems();
}
/// <summary>
/// Determines whether the FontFamily contains the specified FontFamilyMap.
/// </summary>
public bool Contains(FontFamilyMap item)
{
return FindItem(item) >= 0;
}
/// <summary>
/// Copies the contents of the list to the specified array.
/// </summary>
public void CopyTo(FontFamilyMap[] array, int index)
{
if (array == null)
throw new ArgumentNullException("array");
if (index >= array.Length)
throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_IndexGreaterThanOrEqualToArrayLength, "index", "array"));
if (_count > array.Length - index)
throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_NumberOfElementsExceedsArrayLength, index, "array"));
if (_count != 0)
Array.Copy(_items, 0, array, index, _count);
}
void SC.ICollection.CopyTo(Array array, int index)
{
if (array == null)
throw new ArgumentNullException("array");
if (array.Rank != 1)
throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_ArrayCannotBeMultidimensional));
Type elementType = array.GetType().GetElementType();
if (!elementType.IsAssignableFrom(typeof(FamilyTypeface)))
throw new ArgumentException(SR.Get(SRID.CannotConvertType, typeof(FamilyTypeface), elementType));
if (index >= array.Length)
throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_IndexGreaterThanOrEqualToArrayLength, "index", "array"));
if (_count > array.Length - index)
throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_NumberOfElementsExceedsArrayLength, index, "array"));
if (_count != 0)
Array.Copy(_items, 0, array, index, _count);
}
bool SC.ICollection.IsSynchronized
{
get { return false; }
}
object SC.ICollection.SyncRoot
{
get { return (_fontInfo != null) ? (object)_fontInfo : (object)this; }
}
/// <summary>
/// Removes the specified FontFamilyMap.
/// </summary>
public bool Remove(FontFamilyMap item)
{
VerifyChangeable();
int i = FindItem(item);
if (i >= 0)
{
RemoveAt(i);
return true;
}
return false;
}
/// <summary>
/// Gets the number of items in the list.
/// </summary>
public int Count
{
get { return _count; }
}
/// <summary>
/// Gets a value indicating whether the FontFamilyMap list can be changed.
/// </summary>
public bool IsReadOnly
{
get { return _fontInfo == null; }
}
#endregion
#region IList members
/// <summary>
/// Gets the index of the specified FontFamilyMap.
/// </summary>
public int IndexOf(FontFamilyMap item)
{
return FindItem(item);
}
/// <summary>
/// Inserts a FontFamilyMap into the list.
/// </summary>
public void Insert(int index, FontFamilyMap item)
{
InsertItem(index, item);
}
/// <summary>
/// Removes the FontFamilyMap at the specified index.
/// </summary>
public void RemoveAt(int index)
{
RemoveItem(index);
}
/// <summary>
/// Gets or sets the FontFamilyMap at the specified index.
/// </summary>
public FontFamilyMap this[int index]
{
get
{
RangeCheck(index);
return _items[index];
}
set
{
SetItem(index, value);
}
}
int SC.IList.Add(object value)
{
return InsertItem(_count, ConvertValue(value));
}
bool SC.IList.Contains(object value)
{
return FindItem(value as FontFamilyMap) >= 0;
}
int SC.IList.IndexOf(object value)
{
return FindItem(value as FontFamilyMap);
}
void SC.IList.Insert(int index, object item)
{
InsertItem(index, ConvertValue(item));
}
void SC.IList.Remove(object value)
{
VerifyChangeable();
int i = FindItem(value as FontFamilyMap);
if (i >= 0)
RemoveItem(i);
}
bool SC.IList.IsFixedSize
{
get { return IsReadOnly; }
}
object SC.IList.this[int index]
{
get
{
RangeCheck(index);
return _items[index];
}
set
{
SetItem(index, ConvertValue(value));
}
}
#endregion
#region Internal implementation
private int InsertItem(int index, FontFamilyMap item)
{
if (item == null)
throw new ArgumentNullException("item");
VerifyChangeable();
// Limit the number of family maps because we use ushort indexes in the skip lists.
// To exceed this limit a user would have to have a separate family maps for almost
// every Unicode value, in which case (since we search sequentially) performance
// would become a problem.
if (_count + 1 >= ushort.MaxValue)
throw new InvalidOperationException(SR.Get(SRID.CompositeFont_TooManyFamilyMaps));
// Validate the index.
if (index < 0 || index > Count)
throw new ArgumentOutOfRangeException("index");
// PrepareToAddFamilyMap validates the familyName and updates the internal state
// of the CompositeFontInfo object.
_fontInfo.PrepareToAddFamilyMap(item);
// Make room for the new item.
if (_items == null)
{
_items = new FontFamilyMap[InitialCapacity];
}
else if (_count == _items.Length)
{
FontFamilyMap[] items = new FontFamilyMap[_count * 2];
for (int i = 0; i < index; ++i)
items[i] = _items[i];
for (int i = index; i < _count; ++i)
items[i + 1] = _items[i];
_items = items;
}
else if (index < _count)
{
for (int i = _count - 1; i >= index; --i)
_items[i + 1] = _items[i];
}
// Add the item.
_items[index] = item;
_count++;
return index;
}
private void SetItem(int index, FontFamilyMap item)
{
if (item == null)
throw new ArgumentNullException("item");
VerifyChangeable();
RangeCheck(index);
// PrepareToAddFamilyMap validates the familyName and updates the internal state
// of the CompositeFontInfo object.
_fontInfo.PrepareToAddFamilyMap(item);
if (item.Language != _items[index].Language)
{
_fontInfo.InvalidateFamilyMapRanges();
}
_items[index] = item;
}
private void ClearItems()
{
VerifyChangeable();
_fontInfo.InvalidateFamilyMapRanges();
_count = 0;
_items = null;
}
private void RemoveItem(int index)
{
VerifyChangeable();
RangeCheck(index);
_fontInfo.InvalidateFamilyMapRanges();
_count--;
for (int i = index; i < _count; ++i)
{
_items[i] = _items[i + 1];
}
_items[_count] = null;
}
private int FindItem(FontFamilyMap item)
{
if (_count != 0 && item != null)
{
for (int i = 0; i < _count; ++i)
{
if (_items[i].Equals(item))
return i;
}
}
return -1;
}
private void RangeCheck(int index)
{
if (index < 0 || index >= _count)
throw new ArgumentOutOfRangeException("index");
}
private void VerifyChangeable()
{
if (_fontInfo == null)
throw new NotSupportedException(SR.Get(SRID.General_ObjectIsReadOnly));
}
private FontFamilyMap ConvertValue(object obj)
{
if (obj == null)
throw new ArgumentNullException("obj");
FontFamilyMap familyMap = obj as FontFamilyMap;
if (familyMap == null)
throw new ArgumentException(SR.Get(SRID.CannotConvertType, obj.GetType(), typeof(FontFamilyMap)));
return familyMap;
}
private class Enumerator : IEnumerator<FontFamilyMap>, SC.IEnumerator
{
FontFamilyMap[] _items;
int _count;
int _index;
FontFamilyMap _current;
internal Enumerator(FontFamilyMap[] items, int count)
{
_items = items;
_count = count;
_index = -1;
_current = null;
}
public bool MoveNext()
{
if (_index < _count)
{
_index++;
if (_index < _count)
{
_current = _items[_index];
return true;
}
}
_current = null;
return false;
}
void SC.IEnumerator.Reset()
{
_index = -1;
}
public FontFamilyMap Current
{
get { return _current; }
}
object SC.IEnumerator.Current
{
get
{
// If there is no current item a non-generic IEnumerator should throw an exception,
// but a generic IEnumerator<T> is not required to.
if (_current == null)
throw new InvalidOperationException(SR.Get(SRID.Enumerator_VerifyContext));
return _current;
}
}
public void Dispose()
{
}
}
#endregion
}
}
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