CompositeTypefaceMetrics.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / Shaping / CompositeTypefaceMetrics.cs / 1305600 / CompositeTypefaceMetrics.cs
                        

                        
                            //------------------------------------------------------------------------ 
//
//  Microsoft Windows Client Platform
//  Copyright (C) Microsoft Corporation, 2001
// 
//  File:      CompositeTypefaceMetrics.cs
// 
//  Contents:  Typeface metrics of a composite font 
//
//  Created:   5-26-2003 Worachai Chaoweeraprasit (wchao) 
//
//-----------------------------------------------------------------------

 
using System;
using System.Collections.Generic; 
using System.Diagnostics; 
using System.Windows;
using System.Windows.Media; 
using System.Windows.Markup;    // for XmlLanguage
using MS.Internal.FontFace;
using System.Globalization;
 

namespace MS.Internal.Shaping 
{ 
    /// 
    /// Character-based info of a font family 
    /// 
    internal class CompositeTypefaceMetrics : ITypefaceMetrics
    {
        private double          _underlinePosition; 
        private double          _underlineThickness;
        private double          _strikethroughPosition; 
        private double          _strikethroughThickenss; 
        private double          _capsHeight;
        private double          _xHeight; 
        private FontStyle       _style;
        private FontWeight      _weight;
        private FontStretch     _stretch;
 

        // the following figures are collected from observation of 'Times New Roman' 
        // at 72 pt in MS-Word. [wchao, 5/26/2003] 

        // The following Offsets are offsets from baseline. Negative means below the baseline. 
        private const double UnderlineOffsetDefaultInEm        = -0.15625;
        private const double UnderlineSizeDefaultInEm          = (-UnderlineOffsetDefaultInEm) / 2;
        private const double StrikethroughOffsetDefaultInEm    = 0.3125;
        private const double StrikethroughSizeDefaultInEm      = UnderlineSizeDefaultInEm; 
        private const double CapsHeightDefaultInEm             = 1;
        private const double XHeightDefaultInEm                = 0.671875; 
 

        internal CompositeTypefaceMetrics( 
            double      underlinePosition,
            double      underlineThickness,
            double      strikethroughPosition,
            double      strikethroughThickness, 
            double      capsHeight,
            double      xHeight, 
            FontStyle   style, 
            FontWeight  weight,
            FontStretch stretch 
            )
        {
            _underlinePosition      = underlinePosition     != 0 ? underlinePosition      : UnderlineOffsetDefaultInEm;
            _underlineThickness     = underlineThickness     > 0 ? underlineThickness     : UnderlineSizeDefaultInEm; 
            _strikethroughPosition  = strikethroughPosition != 0 ? strikethroughPosition  : StrikethroughOffsetDefaultInEm;
            _strikethroughThickenss = strikethroughThickness > 0 ? strikethroughThickness : StrikethroughSizeDefaultInEm; 
            _capsHeight             = capsHeight             > 0 ? capsHeight             : CapsHeightDefaultInEm; 
            _xHeight                = xHeight                > 0 ? xHeight                : XHeightDefaultInEm;
            _style                  = style; 
            _weight                 = weight;
            _stretch                = stretch;
        }
 

        internal CompositeTypefaceMetrics() 
            : this( 
            UnderlineOffsetDefaultInEm,
            UnderlineSizeDefaultInEm, 
            StrikethroughOffsetDefaultInEm,
            StrikethroughSizeDefaultInEm,
            CapsHeightDefaultInEm,
            XHeightDefaultInEm, 
            FontStyles.Normal,
            FontWeights.Regular, 
            FontStretches.Normal 
            )
        { 
        }

        /// 
        /// (Western) x-height relative to em size. 
        /// 
        public double XHeight 
        { 
            get
            { 
                return _xHeight;
            }
        }
 

        ///  
        /// Distance from baseline to top of English ----, relative to em size. 
        /// 
        public double CapsHeight 
        {
            get
            {
                return _capsHeight; 
            }
        } 
 

        ///  
        /// Distance from baseline to underline position
        /// 
        public double UnderlinePosition
        { 
            get
            { 
                return _underlinePosition; 
            }
        } 


        /// 
        /// Underline thickness 
        /// 
        public double UnderlineThickness 
        { 
            get
            { 
                return _underlineThickness;
            }
        }
 

        ///  
        /// Distance from baseline to strike-through position 
        /// 
        public double StrikethroughPosition 
        {
            get
            {
                return _strikethroughPosition; 
            }
        } 
 

        ///  
        /// strike-through thickness
        /// 
        public double StrikethroughThickness
        { 
            get
            { 
                return _strikethroughThickenss; 
            }
        } 


        /// 
        /// Flag indicate whether this is symbol typeface 
        /// 
        public bool Symbol 
        { 
            get
            { 
                return false;
            }
        }
 
        /// 
        /// Style simulation flags for this typeface. 
        ///  
        public StyleSimulations StyleSimulations
        { 
            get
            {
                return StyleSimulations.None;
            } 
        }
 
        ///  
        /// Collection of localized face names adjusted by the font differentiator.
        ///  
        public IDictionary AdjustedFaceNames
        {
            get
            { 
                return FontDifferentiator.ConstructFaceNamesByStyleWeightStretch(_style, _weight, _stretch);
            } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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