Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / TextFormatting / TextProperties.cs / 1305600 / TextProperties.cs
//------------------------------------------------------------------------
//
// Microsoft Windows Client Platform
// Copyright (C) Microsoft Corporation, 2001
//
// File: TextProperties.cs
//
// Contents: Properties of text, text line and paragraph
//
// Created: 2-25-2003 Worachai Chaoweeraprasit (wchao)
//
//-----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using MS.Internal;
using MS.Internal.Shaping;
namespace MS.Internal.TextFormatting
{
///
/// Internal paragraph properties wrapper
///
internal sealed class ParaProp
{
///
/// Constructing paragraph properties
///
/// Text formatter
/// paragraph properties
/// produce optimal break
internal ParaProp(
TextFormatterImp formatter,
TextParagraphProperties paragraphProperties,
bool optimalBreak
)
{
_paragraphProperties = paragraphProperties;
_emSize = TextFormatterImp.RealToIdeal(paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize);
_indent = TextFormatterImp.RealToIdeal(paragraphProperties.Indent);
_paragraphIndent = TextFormatterImp.RealToIdeal(paragraphProperties.ParagraphIndent);
_height = TextFormatterImp.RealToIdeal(paragraphProperties.LineHeight);
if (_paragraphProperties.FlowDirection == FlowDirection.RightToLeft)
{
_statusFlags |= StatusFlags.Rtl;
}
if (optimalBreak)
{
_statusFlags |= StatusFlags.OptimalBreak;
}
}
[Flags]
private enum StatusFlags
{
Rtl = 0x00000001, // right-to-left reading
OptimalBreak = 0x00000002, // produce optimal break
}
internal bool RightToLeft
{
get { return (_statusFlags & StatusFlags.Rtl) != 0; }
}
internal bool OptimalBreak
{
get { return (_statusFlags & StatusFlags.OptimalBreak) != 0; }
}
internal bool FirstLineInParagraph
{
get { return _paragraphProperties.FirstLineInParagraph; }
}
internal bool AlwaysCollapsible
{
get { return _paragraphProperties.AlwaysCollapsible; }
}
internal int Indent
{
get { return _indent; }
}
internal int ParagraphIndent
{
get { return _paragraphIndent; }
}
internal double DefaultIncrementalTab
{
get { return _paragraphProperties.DefaultIncrementalTab; }
}
internal IList Tabs
{
get { return _paragraphProperties.Tabs; }
}
internal TextAlignment Align
{
get { return _paragraphProperties.TextAlignment; }
}
internal bool Justify
{
get { return _paragraphProperties.TextAlignment == TextAlignment.Justify; }
}
internal bool EmergencyWrap
{
get { return _paragraphProperties.TextWrapping == TextWrapping.Wrap; }
}
internal bool Wrap
{
get { return _paragraphProperties.TextWrapping == TextWrapping.WrapWithOverflow || EmergencyWrap; }
}
internal Typeface DefaultTypeface
{
get { return _paragraphProperties.DefaultTextRunProperties.Typeface; }
}
internal int EmSize
{
get { return _emSize; }
}
internal int LineHeight
{
get { return _height; }
}
internal TextMarkerProperties TextMarkerProperties
{
get { return _paragraphProperties.TextMarkerProperties; }
}
internal TextLexicalService Hyphenator
{
get { return _paragraphProperties.Hyphenator; }
}
internal TextDecorationCollection TextDecorations
{
get { return _paragraphProperties.TextDecorations; }
}
internal Brush DefaultTextDecorationsBrush
{
get { return _paragraphProperties.DefaultTextRunProperties.ForegroundBrush; }
}
private StatusFlags _statusFlags;
private TextParagraphProperties _paragraphProperties;
private int _emSize;
private int _indent;
private int _paragraphIndent;
private int _height;
}
///
/// State of textrun started when it's fetched
///
internal sealed class TextRunInfo
{
private CharacterBufferRange _charBufferRange;
private int _textRunLength;
private int _offsetToFirstCp;
private TextRun _textRun;
private Plsrun _plsrun;
private CultureInfo _digitCulture;
private ushort _charFlags;
private ushort _runFlags;
private TextModifierScope _modifierScope;
private TextRunProperties _properties;
///
/// Constructing a textrun info
///
/// characte buffer range for the run
/// textrun length
/// character offset to run first cp
/// text run
/// the internal LS run type
/// character attribute flags
/// digit culture for the run
/// contextual number substitution for the run
/// if true, indicates a text run in a symbol (i.e., non-Unicode) font
/// The current TextModifier scope for this TextRunInfo
internal TextRunInfo(
CharacterBufferRange charBufferRange,
int textRunLength,
int offsetToFirstCp,
TextRun textRun,
Plsrun lsRunType,
ushort charFlags,
CultureInfo digitCulture,
bool contextualSubstitution,
bool symbolTypeface,
TextModifierScope modifierScope
)
{
_charBufferRange = charBufferRange;
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_textRun = textRun;
_plsrun = lsRunType;
_charFlags = charFlags;
_digitCulture = digitCulture;
_runFlags = 0;
_modifierScope = modifierScope;
if (contextualSubstitution)
{
_runFlags |= (ushort)RunFlags.ContextualSubstitution;
}
if (symbolTypeface)
{
_runFlags |= (ushort)RunFlags.IsSymbol;
}
}
///
/// Text run
///
internal TextRun TextRun
{
get { return _textRun; }
}
///
/// The final TextRunProperties of the TextRun
///
internal TextRunProperties Properties
{
get
{
// The non-null value is cached
if (_properties == null)
{
if (_modifierScope != null)
{
_properties = _modifierScope.ModifyProperties(_textRun.Properties);
}
else
{
_properties = _textRun.Properties;
}
}
return _properties;
}
}
///
/// character buffer
///
internal CharacterBuffer CharacterBuffer
{
get { return _charBufferRange.CharacterBuffer; }
}
///
/// Character offset to run first character in the buffer
///
internal int OffsetToFirstChar
{
get { return _charBufferRange.OffsetToFirstChar; }
}
///
/// Character offset to run first cp from line start
///
internal int OffsetToFirstCp
{
get { return _offsetToFirstCp; }
}
///
/// String length
///
internal int StringLength
{
get { return _charBufferRange.Length; }
set { _charBufferRange = new CharacterBufferRange(_charBufferRange.CharacterBufferReference, value); }
}
///
/// Run length
///
internal int Length
{
get { return _textRunLength; }
set { _textRunLength = value; }
}
///
/// State of character in the run
///
internal ushort CharacterAttributeFlags
{
get { return _charFlags; }
set { _charFlags = value; }
}
///
/// Digit culture for the run.
///
internal CultureInfo DigitCulture
{
get { return _digitCulture; }
}
///
/// Specifies whether the run requires contextual number substitution.
///
internal bool ContextualSubstitution
{
get { return (_runFlags & (ushort)RunFlags.ContextualSubstitution) != 0; }
}
///
/// Specifies whether the run is in a non-Unicode font, such as Symbol or Wingdings.
///
///
/// Non-Unicode runs require special handling because code points do not have their
/// standard Unicode meanings.
///
internal bool IsSymbol
{
get { return (_runFlags & (ushort)RunFlags.IsSymbol) != 0; }
}
///
/// Plsrun type
///
internal Plsrun Plsrun
{
get { return _plsrun; }
}
///
/// Is run an end of line?
///
internal bool IsEndOfLine
{
get { return _textRun is TextEndOfLine; }
}
///
/// The modification scope of this run
///
internal TextModifierScope TextModifierScope
{
get { return _modifierScope; }
}
///
/// Get rough width of the run
///
internal int GetRoughWidth(double realToIdeal)
{
TextRunProperties properties = _textRun.Properties;
if (properties != null)
{
// estimate rough width of each character in a run being 75% of Em.
return (int)Math.Round(properties.FontRenderingEmSize * 0.75 * _textRunLength * realToIdeal);
}
return 0;
}
///
/// Map TextRun type to known plsrun type
///
internal static Plsrun GetRunType(TextRun textRun)
{
if (textRun is ITextSymbols || textRun is TextShapeableSymbols)
return Plsrun.Text;
if (textRun is TextEmbeddedObject)
return Plsrun.InlineObject;
if (textRun is TextEndOfParagraph)
return Plsrun.ParaBreak;
if (textRun is TextEndOfLine)
return Plsrun.LineBreak;
// Other text run type are all considered hidden by LS
return Plsrun.Hidden;
}
[Flags]
private enum RunFlags
{
ContextualSubstitution = 0x0001,
IsSymbol = 0x0002,
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------
//
// Microsoft Windows Client Platform
// Copyright (C) Microsoft Corporation, 2001
//
// File: TextProperties.cs
//
// Contents: Properties of text, text line and paragraph
//
// Created: 2-25-2003 Worachai Chaoweeraprasit (wchao)
//
//-----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using MS.Internal;
using MS.Internal.Shaping;
namespace MS.Internal.TextFormatting
{
///
/// Internal paragraph properties wrapper
///
internal sealed class ParaProp
{
///
/// Constructing paragraph properties
///
/// Text formatter
/// paragraph properties
/// produce optimal break
internal ParaProp(
TextFormatterImp formatter,
TextParagraphProperties paragraphProperties,
bool optimalBreak
)
{
_paragraphProperties = paragraphProperties;
_emSize = TextFormatterImp.RealToIdeal(paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize);
_indent = TextFormatterImp.RealToIdeal(paragraphProperties.Indent);
_paragraphIndent = TextFormatterImp.RealToIdeal(paragraphProperties.ParagraphIndent);
_height = TextFormatterImp.RealToIdeal(paragraphProperties.LineHeight);
if (_paragraphProperties.FlowDirection == FlowDirection.RightToLeft)
{
_statusFlags |= StatusFlags.Rtl;
}
if (optimalBreak)
{
_statusFlags |= StatusFlags.OptimalBreak;
}
}
[Flags]
private enum StatusFlags
{
Rtl = 0x00000001, // right-to-left reading
OptimalBreak = 0x00000002, // produce optimal break
}
internal bool RightToLeft
{
get { return (_statusFlags & StatusFlags.Rtl) != 0; }
}
internal bool OptimalBreak
{
get { return (_statusFlags & StatusFlags.OptimalBreak) != 0; }
}
internal bool FirstLineInParagraph
{
get { return _paragraphProperties.FirstLineInParagraph; }
}
internal bool AlwaysCollapsible
{
get { return _paragraphProperties.AlwaysCollapsible; }
}
internal int Indent
{
get { return _indent; }
}
internal int ParagraphIndent
{
get { return _paragraphIndent; }
}
internal double DefaultIncrementalTab
{
get { return _paragraphProperties.DefaultIncrementalTab; }
}
internal IList Tabs
{
get { return _paragraphProperties.Tabs; }
}
internal TextAlignment Align
{
get { return _paragraphProperties.TextAlignment; }
}
internal bool Justify
{
get { return _paragraphProperties.TextAlignment == TextAlignment.Justify; }
}
internal bool EmergencyWrap
{
get { return _paragraphProperties.TextWrapping == TextWrapping.Wrap; }
}
internal bool Wrap
{
get { return _paragraphProperties.TextWrapping == TextWrapping.WrapWithOverflow || EmergencyWrap; }
}
internal Typeface DefaultTypeface
{
get { return _paragraphProperties.DefaultTextRunProperties.Typeface; }
}
internal int EmSize
{
get { return _emSize; }
}
internal int LineHeight
{
get { return _height; }
}
internal TextMarkerProperties TextMarkerProperties
{
get { return _paragraphProperties.TextMarkerProperties; }
}
internal TextLexicalService Hyphenator
{
get { return _paragraphProperties.Hyphenator; }
}
internal TextDecorationCollection TextDecorations
{
get { return _paragraphProperties.TextDecorations; }
}
internal Brush DefaultTextDecorationsBrush
{
get { return _paragraphProperties.DefaultTextRunProperties.ForegroundBrush; }
}
private StatusFlags _statusFlags;
private TextParagraphProperties _paragraphProperties;
private int _emSize;
private int _indent;
private int _paragraphIndent;
private int _height;
}
///
/// State of textrun started when it's fetched
///
internal sealed class TextRunInfo
{
private CharacterBufferRange _charBufferRange;
private int _textRunLength;
private int _offsetToFirstCp;
private TextRun _textRun;
private Plsrun _plsrun;
private CultureInfo _digitCulture;
private ushort _charFlags;
private ushort _runFlags;
private TextModifierScope _modifierScope;
private TextRunProperties _properties;
///
/// Constructing a textrun info
///
/// characte buffer range for the run
/// textrun length
/// character offset to run first cp
/// text run
/// the internal LS run type
/// character attribute flags
/// digit culture for the run
/// contextual number substitution for the run
/// if true, indicates a text run in a symbol (i.e., non-Unicode) font
/// The current TextModifier scope for this TextRunInfo
internal TextRunInfo(
CharacterBufferRange charBufferRange,
int textRunLength,
int offsetToFirstCp,
TextRun textRun,
Plsrun lsRunType,
ushort charFlags,
CultureInfo digitCulture,
bool contextualSubstitution,
bool symbolTypeface,
TextModifierScope modifierScope
)
{
_charBufferRange = charBufferRange;
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_textRun = textRun;
_plsrun = lsRunType;
_charFlags = charFlags;
_digitCulture = digitCulture;
_runFlags = 0;
_modifierScope = modifierScope;
if (contextualSubstitution)
{
_runFlags |= (ushort)RunFlags.ContextualSubstitution;
}
if (symbolTypeface)
{
_runFlags |= (ushort)RunFlags.IsSymbol;
}
}
///
/// Text run
///
internal TextRun TextRun
{
get { return _textRun; }
}
///
/// The final TextRunProperties of the TextRun
///
internal TextRunProperties Properties
{
get
{
// The non-null value is cached
if (_properties == null)
{
if (_modifierScope != null)
{
_properties = _modifierScope.ModifyProperties(_textRun.Properties);
}
else
{
_properties = _textRun.Properties;
}
}
return _properties;
}
}
///
/// character buffer
///
internal CharacterBuffer CharacterBuffer
{
get { return _charBufferRange.CharacterBuffer; }
}
///
/// Character offset to run first character in the buffer
///
internal int OffsetToFirstChar
{
get { return _charBufferRange.OffsetToFirstChar; }
}
///
/// Character offset to run first cp from line start
///
internal int OffsetToFirstCp
{
get { return _offsetToFirstCp; }
}
///
/// String length
///
internal int StringLength
{
get { return _charBufferRange.Length; }
set { _charBufferRange = new CharacterBufferRange(_charBufferRange.CharacterBufferReference, value); }
}
///
/// Run length
///
internal int Length
{
get { return _textRunLength; }
set { _textRunLength = value; }
}
///
/// State of character in the run
///
internal ushort CharacterAttributeFlags
{
get { return _charFlags; }
set { _charFlags = value; }
}
///
/// Digit culture for the run.
///
internal CultureInfo DigitCulture
{
get { return _digitCulture; }
}
///
/// Specifies whether the run requires contextual number substitution.
///
internal bool ContextualSubstitution
{
get { return (_runFlags & (ushort)RunFlags.ContextualSubstitution) != 0; }
}
///
/// Specifies whether the run is in a non-Unicode font, such as Symbol or Wingdings.
///
///
/// Non-Unicode runs require special handling because code points do not have their
/// standard Unicode meanings.
///
internal bool IsSymbol
{
get { return (_runFlags & (ushort)RunFlags.IsSymbol) != 0; }
}
///
/// Plsrun type
///
internal Plsrun Plsrun
{
get { return _plsrun; }
}
///
/// Is run an end of line?
///
internal bool IsEndOfLine
{
get { return _textRun is TextEndOfLine; }
}
///
/// The modification scope of this run
///
internal TextModifierScope TextModifierScope
{
get { return _modifierScope; }
}
///
/// Get rough width of the run
///
internal int GetRoughWidth(double realToIdeal)
{
TextRunProperties properties = _textRun.Properties;
if (properties != null)
{
// estimate rough width of each character in a run being 75% of Em.
return (int)Math.Round(properties.FontRenderingEmSize * 0.75 * _textRunLength * realToIdeal);
}
return 0;
}
///
/// Map TextRun type to known plsrun type
///
internal static Plsrun GetRunType(TextRun textRun)
{
if (textRun is ITextSymbols || textRun is TextShapeableSymbols)
return Plsrun.Text;
if (textRun is TextEmbeddedObject)
return Plsrun.InlineObject;
if (textRun is TextEndOfParagraph)
return Plsrun.ParaBreak;
if (textRun is TextEndOfLine)
return Plsrun.LineBreak;
// Other text run type are all considered hidden by LS
return Plsrun.Hidden;
}
[Flags]
private enum RunFlags
{
ContextualSubstitution = 0x0001,
IsSymbol = 0x0002,
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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