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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// Synopsis: Implements class Parsers for internal use of type converters
using System.ComponentModel;
using System.Windows.Media;
namespace MS.Internal
{
internal static partial class Parsers
{
private const int s_zeroChar = (int) '0';
private const int s_aLower = (int) 'a';
private const int s_aUpper = (int) 'A';
static private int ParseHexChar(char c )
{
int intChar = (int) c;
if ((intChar >= s_zeroChar) && (intChar <= (s_zeroChar+9)))
{
return (intChar-s_zeroChar);
}
if ((intChar >= s_aLower) && (intChar <= (s_aLower+5)))
{
return (intChar-s_aLower + 10);
}
if ((intChar >= s_aUpper) && (intChar <= (s_aUpper+5)))
{
return (intChar-s_aUpper + 10);
}
throw new FormatException(SR.Parsers_IllegalToken);
}
static private Color ParseHexColor(string trimmedColor)
{
int a,r,g,b;
a = 255;
if ( trimmedColor.Length > 7 )
{
a = ParseHexChar(trimmedColor[1]) * 16 + ParseHexChar(trimmedColor[2]);
r = ParseHexChar(trimmedColor[3]) * 16 + ParseHexChar(trimmedColor[4]);
g = ParseHexChar(trimmedColor[5]) * 16 + ParseHexChar(trimmedColor[6]);
b = ParseHexChar(trimmedColor[7]) * 16 + ParseHexChar(trimmedColor[8]);
}
else if ( trimmedColor.Length > 5)
{
r = ParseHexChar(trimmedColor[1]) * 16 + ParseHexChar(trimmedColor[2]);
g = ParseHexChar(trimmedColor[3]) * 16 + ParseHexChar(trimmedColor[4]);
b = ParseHexChar(trimmedColor[5]) * 16 + ParseHexChar(trimmedColor[6]);
}
else if (trimmedColor.Length > 4)
{
a = ParseHexChar(trimmedColor[1]);
a = a + a*16;
r = ParseHexChar(trimmedColor[2]);
r = r + r*16;
g = ParseHexChar(trimmedColor[3]);
g = g + g*16;
b = ParseHexChar(trimmedColor[4]);
b = b + b*16;
}
else
{
r = ParseHexChar(trimmedColor[1]);
r = r + r*16;
g = ParseHexChar(trimmedColor[2]);
g = g + g*16;
b = ParseHexChar(trimmedColor[3]);
b = b + b*16;
}
return ( Color.FromArgb ((byte)a, (byte)r, (byte)g, (byte)b) );
}
internal const string s_ContextColor = "ContextColor ";
internal const string s_ContextColorNoSpace = "ContextColor";
static private Color ParseContextColor(string trimmedColor, IFormatProvider formatProvider, ITypeDescriptorContext context)
{
if (!trimmedColor.StartsWith(s_ContextColor, StringComparison.OrdinalIgnoreCase))
{
throw new FormatException(SR.Parsers_IllegalToken);
}
string tokens = trimmedColor.Substring(s_ContextColor.Length);
tokens = tokens.Trim();
string[] preSplit = tokens.Split(' ');
if (preSplit.Length < 2)
{
throw new FormatException(SR.Parsers_IllegalToken);
}
tokens = tokens.Substring(preSplit[0].Length);
TokenizerHelper th = new TokenizerHelper(tokens, formatProvider);
string[] split = tokens.Split(new Char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
int numTokens = split.Length;
float alpha = Convert.ToSingle(th.NextTokenRequired(), formatProvider);
float[] values = new float[numTokens - 1];
for (int i = 0; i < numTokens - 1; i++)
{
values[i] = Convert.ToSingle(th.NextTokenRequired(), formatProvider);
}
string profileString = preSplit[0];
UriHolder uriHolder = TypeConverterHelper.GetUriFromUriContext(context,profileString);
Uri profileUri;
if (uriHolder.BaseUri != null)
{
profileUri = new Uri(uriHolder.BaseUri, uriHolder.OriginalUri);
}
else
{
profileUri = uriHolder.OriginalUri;
}
Color result = Color.FromAValues(alpha, values, profileUri);
// If the number of color values found does not match the number of channels in the profile, we must throw
if (result.ColorContext.NumChannels != values.Length)
{
throw new FormatException(SR.Parsers_IllegalToken);
}
return result;
}
static private Color ParseScRgbColor(string trimmedColor, IFormatProvider formatProvider)
{
if (!trimmedColor.StartsWith("sc#", StringComparison.Ordinal))
{
throw new FormatException(SR.Parsers_IllegalToken);
}
string tokens = trimmedColor.Substring(3, trimmedColor.Length - 3);
// The tokenizer helper will tokenize a list based on the IFormatProvider.
TokenizerHelper th = new TokenizerHelper(tokens, formatProvider);
float[] values = new float[4];
for (int i = 0; i < 3; i++)
{
values[i] = Convert.ToSingle(th.NextTokenRequired(), formatProvider);
}
if (th.NextToken())
{
values[3] = Convert.ToSingle(th.GetCurrentToken(), formatProvider);
// We should be out of tokens at this point
if (th.NextToken())
{
throw new FormatException(SR.Parsers_IllegalToken);
}
return Color.FromScRgb(values[0], values[1], values[2], values[3]);
}
else
{
return Color.FromScRgb(1.0f, values[0], values[1], values[2]);
}
}
/// <summary>
/// ParseColor
/// <param name="color"> string with color description </param>
/// <param name="formatProvider">IFormatProvider for processing string</param>
/// </summary>
internal static Color ParseColor(string color, IFormatProvider formatProvider)
{
return ParseColor(color, formatProvider, null);
}
/// <summary>
/// ParseColor
/// <param name="color"> string with color description </param>
/// <param name="formatProvider">IFormatProvider for processing string</param>
/// <param name="context">ITypeDescriptorContext</param>
/// </summary>
internal static Color ParseColor(string color, IFormatProvider formatProvider, ITypeDescriptorContext context)
{
bool isPossibleKnowColor;
bool isNumericColor;
bool isScRgbColor;
bool isContextColor;
string trimmedColor = KnownColors.MatchColor(color, out isPossibleKnowColor, out isNumericColor, out isContextColor, out isScRgbColor);
if ((isPossibleKnowColor == false) &&
(isNumericColor == false) &&
(isScRgbColor == false) &&
(isContextColor== false))
{
throw new FormatException(SR.Parsers_IllegalToken);
}
//Is it a number?
if (isNumericColor)
{
return ParseHexColor(trimmedColor);
}
else if (isContextColor)
{
return ParseContextColor(trimmedColor, formatProvider, context);
}
else if (isScRgbColor)
{
return ParseScRgbColor(trimmedColor, formatProvider);
}
else
{
KnownColor kc = KnownColors.ColorStringToKnownColor(trimmedColor);
if (kc == KnownColor.UnknownColor)
{
throw new FormatException(SR.Parsers_IllegalToken);
}
return Color.FromUInt32((uint)kc);
}
}
/// <summary>
/// ParseBrush
/// <param name="brush"> string with brush description </param>
/// <param name="formatProvider">IFormatProvider for processing string</param>
/// <param name="context">ITypeDescriptorContext</param>
/// </summary>
internal static Brush ParseBrush(string brush, IFormatProvider formatProvider, ITypeDescriptorContext context)
{
bool isPossibleKnownColor;
bool isNumericColor;
bool isScRgbColor;
bool isContextColor;
string trimmedColor = KnownColors.MatchColor(brush, out isPossibleKnownColor, out isNumericColor, out isContextColor, out isScRgbColor);
if (trimmedColor.Length == 0)
{
throw new FormatException(SR.Parser_Empty);
}
// Note that because trimmedColor is exactly brush.Trim() we don't have to worry about
// extra tokens as we do with TokenizerHelper. If we return one of the solid color
// brushes then the ParseColor routine (or ColorStringToKnownColor) matched the entire
// input.
if (isNumericColor)
{
return (new SolidColorBrush(ParseHexColor(trimmedColor)));
}
if (isContextColor)
{
return (new SolidColorBrush(ParseContextColor(trimmedColor, formatProvider, context)));
}
if (isScRgbColor)
{
return (new SolidColorBrush(ParseScRgbColor(trimmedColor, formatProvider)));
}
if (isPossibleKnownColor)
{
SolidColorBrush scp = KnownColors.ColorStringToKnownBrush(trimmedColor);
if (scp != null)
{
return scp;
}
}
// If it's not a color, so the content is illegal.
throw new FormatException(SR.Parsers_IllegalToken);
}
/// <summary>
/// ParseTransform - parse a Transform from a string
/// </summary>
internal static Transform ParseTransform(
string transformString,
IFormatProvider formatProvider)
{
Matrix matrix = Matrix.Parse(transformString);
return new MatrixTransform(matrix);
}
/// <summary>
/// Parse a PathFigureCollection string.
/// </summary>
internal static PathFigureCollection ParsePathFigureCollection(
string pathString,
IFormatProvider formatProvider)
{
PathStreamGeometryContext context = new PathStreamGeometryContext();
AbbreviatedGeometryParser parser = new AbbreviatedGeometryParser();
parser.ParseToGeometryContext(context, pathString, 0 /* curIndex */);
PathGeometry pathGeometry = context.GetPathGeometry();
return pathGeometry.Figures;
}
}
}
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