FixedSOMTextRun.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Documents / FixedSOMTextRun.cs / 1 / FixedSOMTextRun.cs
                        

                        
                            /*++ 

    File: FixedSOMTextRun.cs

    Copyright (C) 2005 Microsoft Corporation. All rights reserved. 

    Description: 
        This class represents a (partial) Glyphs element on the page. Most of the time it will be a full glyphs element 
        Partial elements are necessary when we decide that a single Glyphs element represents multiple semantic entitites such as table cells
 
    History:
       05/17/2005: [....] - Created

--*/ 

 
namespace System.Windows.Documents 
{
    using System.Windows.Shapes; 
    using System.Windows.Markup;    // for XmlLanguage
    using System.Windows.Media;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Windows;
    using System.Collections.Generic; 
 
    //a set of characters that have the same font, face and size
    internal sealed class FixedSOMTextRun : FixedSOMElement, IComparable 
    {
        //--------------------------------------------------------------------
        //
        // Constructors 
        //
        //--------------------------------------------------------------------- 
 
        #region Constructors
 
        private FixedSOMTextRun(Rect boundingRect, GeneralTransform trans, FixedNode fixedNode, int startIndex, int endIndex) : base(fixedNode, startIndex, endIndex, trans)
        {
            _boundingRect = trans.TransformBounds(boundingRect);
        } 

 
        #endregion Constructors 

        int IComparable.CompareTo(object comparedObj) 
        {
            FixedSOMTextRun otherRun = comparedObj as FixedSOMTextRun;
            Debug.Assert(otherRun != null);
            int result = 0; 

            if (_fixedBlock.IsRTL) 
            { 
                Rect thisRect = this.BoundingRect;
                Rect otherRect = otherRun.BoundingRect; 

                if (!this.Matrix.IsIdentity)
                {
                    Matrix inversionMat = _mat; 
                    inversionMat.Invert();
                    thisRect.Transform(inversionMat); 
                    thisRect.Offset(_mat.OffsetX, _mat.OffsetY); 

                    otherRect.Transform(inversionMat); 
                    otherRect.Offset(_mat.OffsetX, _mat.OffsetY);
                }

                thisRect.Offset(_mat.OffsetX, _mat.OffsetY); 
                otherRect.Offset(otherRun.Matrix.OffsetX, otherRun.Matrix.OffsetY);
 
                if (FixedTextBuilder.IsSameLine(otherRect.Top - thisRect.Top, thisRect.Height, otherRect.Height)) 
                {
                    result = (thisRect.Left < otherRect.Left) ? 1 : -1; 
                }
                else
                {
                    result = (thisRect.Top < otherRect.Top) ? -1 : +1; 
                }
            } 
 
            else
            { 
                //Markup order for LTR languages

                List markupOrder = this.FixedBlock.FixedSOMPage.MarkupOrder;
                result = markupOrder.IndexOf(this.FixedNode) - markupOrder.IndexOf(otherRun.FixedNode); 
            }
 
            return result; 
        }
 

        //-------------------------------------------------------------------
        //
        // Public Methods 
        //
        //--------------------------------------------------------------------- 
 
        #region public Methods
 
        public static FixedSOMTextRun Create(Rect boundingRect, GeneralTransform transform, Glyphs glyphs, FixedNode fixedNode, int startIndex, int endIndex, bool allowReverseGlyphs)
        {
            if (String.IsNullOrEmpty(glyphs.UnicodeString) ||
                glyphs.FontRenderingEmSize <= 0) 
            {
                return null; 
            } 
            FixedSOMTextRun run = new FixedSOMTextRun(boundingRect, transform, fixedNode, startIndex, endIndex);
            run._fontUri = glyphs.FontUri; 
            run._cultureInfo = glyphs.Language.GetCompatibleCulture();
            run._bidiLevel = glyphs.BidiLevel;
            run._isSideways = glyphs.IsSideways;
            run._fontSize = glyphs.FontRenderingEmSize; 

            GlyphRun glyphRun = glyphs.ToGlyphRun(); 
 
            GlyphTypeface gtf = glyphRun.GlyphTypeface;
 
            // Find font family
            // glyphs.FontUri, glyphRun.glyphTypeface

            gtf.FamilyNames.TryGetValue(run._cultureInfo, out run._fontFamily); 
            if (run._fontFamily == null)
            { 
                //Try getting the English name 
                gtf.FamilyNames.TryGetValue(CultureInfo.GetCultureInfo("en-US"), out run._fontFamily);
            } 

            // Find font style (normal, italics, Oblique)
            // need to open Font file.
            run._fontStyle = gtf.Style; 

            // Find font weight (bold, semibold, ExtraLight) 
            run._fontWeight = gtf.Weight; 

            // Find font stretch (UltraCondensed, SemiExpanded, etc) 
            run._fontStretch = gtf.Stretch;

            //Height and width should be the same for x character
            run._defaultCharWidth = gtf.XHeight > 0 ? gtf.XHeight * glyphs.FontRenderingEmSize : glyphRun.AdvanceWidths[startIndex]; 

            Transform trans = transform.AffineTransform; 
            if (trans != null && 
                !(trans.Value.IsIdentity))
            { 
                Matrix mat = trans.Value;
                double yScale = Math.Sqrt(mat.M12*mat.M12 + mat.M22*mat.M22);
                double xScale = Math.Sqrt(mat.M11 * mat.M11 + mat.M21 * mat.M21);
                run._fontSize *= yScale; 
                run._defaultCharWidth *= xScale;
            } 
 
            run._foreground = glyphs.Fill;
            String s = glyphs.UnicodeString; 
            run.Text = s.Substring(startIndex, endIndex-startIndex);

            if (allowReverseGlyphs && run._bidiLevel == 0 && !run._isSideways &&
                startIndex == 0 && endIndex == s.Length 
                && String.IsNullOrEmpty(glyphs.CaretStops)
                && FixedTextBuilder.MostlyRTL(s)) 
            { 
                char[] chars = new char[run.Text.Length];
                for (int i=0; i 0)
            { 
                run._isWhiteSpace = false;
            }
            else
            { 
                run._isWhiteSpace = true;
                for (int i = 0; i < s.Length; i++) 
                { 
                    if (!Char.IsWhiteSpace(s[i]))
                    { 
                        run._isWhiteSpace = false;
                        break;
                    }
                } 
            }
            return run; 
        } 

#if DEBUG 
        public override void Render(DrawingContext dc, string label, DrawDebugVisual debugVisual)
        {
            Pen pen = new Pen(Brushes.Blue, 1);
            Rect rect = _boundingRect; 
            rect.Inflate(-1,-1);
            dc.DrawRectangle(null, pen , rect); 
            if (label != null && debugVisual == DrawDebugVisual.TextRuns) 
            {
                base.RenderLabel(dc, label); 
            }
        }

        ///  
        /// Create a string representation of this object
        ///  
        /// string - A string representation of this object 
        public override string ToString()
        { 
            return _text;
        }
#endif
 
        public bool HasSameRichProperties(FixedSOMTextRun run)
        { 
            if (run.FontRenderingEmSize == this.FontRenderingEmSize && 
                run.CultureInfo.Equals(this.CultureInfo) &&
                run.FontStyle.Equals(this.FontStyle) && 
                run.FontStretch.Equals(this.FontStretch) &&
                run.FontWeight.Equals(this.FontWeight) &&
                run.FontFamily == this.FontFamily &&
                run.IsRTL == this.IsRTL) 
            {
                SolidColorBrush thisBrush = this.Foreground as SolidColorBrush; 
                SolidColorBrush otherBrush = run.Foreground as SolidColorBrush; 
                if ((run.Foreground == null && this.Foreground == null) ||
                     thisBrush != null && otherBrush != null && thisBrush.Color == otherBrush.Color && thisBrush.Opacity == otherBrush.Opacity) 
                {
                    return true;
                }
            } 
            return false;
        } 
 
        public override void SetRTFProperties(FixedElement element)
        { 
            if (_cultureInfo != null)
            {
                element.SetValue(FrameworkElement.LanguageProperty, XmlLanguage.GetLanguage(_cultureInfo.IetfLanguageTag));
            } 
            element.SetValue(TextElement.FontSizeProperty, _fontSize);
            element.SetValue(TextElement.FontWeightProperty, _fontWeight); 
            element.SetValue(TextElement.FontStretchProperty, _fontStretch); 
            element.SetValue(TextElement.FontStyleProperty, _fontStyle);
            if (this.IsRTL) 
            {
                element.SetValue(FrameworkElement.FlowDirectionProperty, FlowDirection.RightToLeft);
            }
            else 
            {
                element.SetValue(FrameworkElement.FlowDirectionProperty, FlowDirection.LeftToRight); 
            } 

            if (_fontFamily != null) 
            {
                element.SetValue(TextElement.FontFamilyProperty, new FontFamily(_fontFamily));
            }
            element.SetValue(TextElement.ForegroundProperty, _foreground); 
        }
        #endregion Public Methods 
 

        #region Public Properties 

        public double DefaultCharWidth
        {
            get 
            {
                return _defaultCharWidth; 
            } 
        }
 
        public bool IsSideways
        {
            get
            { 
                return _isSideways;
            } 
        } 

        public bool IsWhiteSpace 
        {
            get
            {
                return _isWhiteSpace; 
            }
        } 
 
        public CultureInfo CultureInfo
        { 
            get
            {
                return _cultureInfo;
            } 
        }
 
        public bool IsLTR 
        {
            get 
            {
                return ((_bidiLevel & 1) == 0) && !_isReversed;
            }
        } 

        public bool IsRTL 
        { 
            get
            { 
                return !(this.IsLTR);
            }
        }
 
        public String Text
        { 
            get 
            {
                return _text; 
            }
            set
            {
                _text = value; 
            }
        } 
 
        public FixedSOMFixedBlock FixedBlock
        { 
            get
            {
                return _fixedBlock;
            } 
            set
            { 
                _fixedBlock = value; 
            }
        } 

        public String FontFamily
        {
            get 
            {
                return _fontFamily; 
            } 
        }
        ///  
        /// Returns designed style (regular/italic/oblique) of this font face
        /// 
        /// Designed style of this font face.
        public FontStyle FontStyle 
        {
            get 
            { 
                return _fontStyle;
            } 
        }

        /// 
        /// Returns designed weight of this font face. 
        /// 
        /// Designed weight of this font face. 
        public FontWeight FontWeight 
        {
            get 
            {
                return _fontWeight;
            }
        } 

        ///  
        /// Returns designed stretch of this font face. 
        /// 
        /// Designed stretch of this font face. 
        public FontStretch FontStretch
        {
            get
            { 
                return _fontStretch;
            } 
        } 

        public double FontRenderingEmSize 
        {
            get
            {
                return _fontSize; 
            }
        } 
 
        public Brush Foreground
        { 
            get
            {
                return _foreground;
            } 
        }
 
        public bool IsReversed 
        {
            get 
            {
                return _isReversed;
            }
        } 

 
        #endregion public Properties 

        #region Internal Properties 
        internal int LineIndex
        {
            get { return _lineIndex; }
            set { _lineIndex = value; } 
        }
        #endregion Internal Properties 
        //-------------------------------------------------------------------- 
        //
        // Private Fields 
        //
        //---------------------------------------------------------------------
        #region Private Fields
 
        private double _defaultCharWidth;
        private Uri _fontUri; 
        private CultureInfo _cultureInfo; 
        private bool _isSideways;
        private int _bidiLevel; 
        private bool _isWhiteSpace;
        private bool _isReversed;
        private FixedSOMFixedBlock _fixedBlock;
        private int _lineIndex; 
        private String _text;
        private Brush _foreground; 
        private double _fontSize; 
        private String _fontFamily;
        private FontStyle _fontStyle; 
        private FontWeight _fontWeight;
        private FontStretch _fontStretch;

        #endregion Private Fields 

    } 
 
}
 



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

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