/// <inheritdoc/>
public Boolean Equals(ShapedString other)
{
if (other == null || other.Length != Length)
{
return(false);
}
if (IsEmpty && other.Length == 0)
{
return(true);
}
if (Source is IStringSource <ShapedChar> src)
{
for (int ixstr = Start, ixother = 0; ixother < Length; ixstr++, ixother++)
{
if (src[ixstr] != other[ixother])
{
return(false);
}
}
return(true);
}
return(false);
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapedStringSegment"/> structure.
/// </summary>
/// <param name="source">The source <see cref="ShapedString"/> object from which the segment's shaped characters are retrieved.</param>
public ShapedStringSegment(ShapedString source)
{
Contract.Require(source, nameof(source));
this.Source = source;
this.Start = 0;
this.Length = source.Length;
this.hashCode = CalculateHashCode(source, 0, source.Length);
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapedStringSegment"/> structure.
/// </summary>
/// <param name="source">The source <see cref="ShapedString"/> object from which the segment's shaped characters are retrieved.</param>
/// <param name="start">The index of the segment's first shaped character within its parent shaped string.</param>
/// <param name="length">The number of shaped characters in the segment.</param>
public ShapedStringSegment(ShapedString source, Int32 start, Int32 length)
{
Contract.Require(source, nameof(source));
Contract.EnsureRange(start >= 0 && start <= source.Length, nameof(start));
Contract.EnsureRange(length >= 0 && start + length <= source.Length, nameof(length));
this.Source = source;
this.Start = start;
this.Length = length;
this.hashCode = CalculateHashCode(source, start, length);
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapedStringBuilder"/> class.
/// </summary>
/// <param name="value">The string that is used to initialize this instance.</param>
/// <param name="capacity">The initial capacity of this instance's buffer, in characters.</param>
public ShapedStringBuilder(ShapedString value, Int32 capacity = 0)
{
Contract.EnsureRange(capacity >= 0, nameof(capacity));
if (capacity == 0)
{
capacity = DefaultCapacity;
}
this.buffer = new ShapedChar[capacity];
if (value != null)
{
value.CopyTo(0, this.buffer, 0, value.Length);
this.length = value.Length;
}
}
/// <summary>
/// Creates a new instance of <see cref="ShapedString"/> with the same value as a specified <see cref="ShapedString"/>.
/// </summary>
/// <param name="str">The string to copy.</param>
/// <returns>A new string with the same value as <paramref name="str"/>.</returns>
public static ShapedString Copy(ShapedString str)
{
Contract.Require(str, nameof(str));
return(new ShapedString(str.FontFace, str.Language, str.Script, str.Direction, str.buffer));
}
/// <summary> /// Indicates whether the specified string is <see langword="null"/> or an empty string. /// </summary> /// <param name="value">The string to test.</param> /// <returns><see langword="true"/> if the <paramref name="value"/> parameter is <see langword="null"/> /// or an empty string; otherwise, <see langword="false"/>.</returns> public static Boolean IsNullOrEmpty(ShapedString value) => (value == null || value.buffer.Length == 0);
