Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Text / TextDpi.cs / 1305600 / TextDpi.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: TextDpi.cs
//
// Description: Helpers to handle text dpi conversions and limitations.
//
// History:
// 04/25/2003 : [....] - moving from Avalon branch.
//
//---------------------------------------------------------------------------
using System; // Double, ...
using System.Windows; // DependencyObject
using System.Windows.Documents; // TextElement, ...
using System.Windows.Media; // FontFamily
using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS
namespace MS.Internal.Text
{
// ---------------------------------------------------------------------
// Helpers to handle text dpi conversions and limitations.
// ---------------------------------------------------------------------
internal static class TextDpi
{
// ------------------------------------------------------------------
// Minimum width for text measurement.
// -----------------------------------------------------------------
internal static double MinWidth { get { return _minSize; } }
// ------------------------------------------------------------------
// Maximum width for text measurement.
// ------------------------------------------------------------------
internal static double MaxWidth { get { return _maxSize; } }
// -----------------------------------------------------------------
// Convert from logical measurement unit to text measurement unit.
//
// d - value in logical measurement unit
//
// Returns: value in text measurement unit.
// ------------------------------------------------------------------
internal static int ToTextDpi(double d)
{
if (DoubleUtil.IsZero(d)) { return 0; }
else if (d > 0)
{
if (d > _maxSize) { d = _maxSize; }
else if (d < _minSize) { d = _minSize; }
}
else
{
if (d < -_maxSize) { d = -_maxSize; }
else if (d > -_minSize) { d = -_minSize; }
}
return (int)Math.Round(d * _scale);
}
// -----------------------------------------------------------------
// Convert from text measurement unit to logical measurement unit.
//
// i - value in text measurement unit
//
// Returns: value in logical measurement unit.
// -----------------------------------------------------------------
internal static double FromTextDpi(int i)
{
return ((double)i) / _scale;
}
// -----------------------------------------------------------------
// Convert point from logical measurement unit to text measurement unit.
// ------------------------------------------------------------------
internal static PTS.FSPOINT ToTextPoint(Point point)
{
PTS.FSPOINT fspoint = new PTS.FSPOINT();
fspoint.u = ToTextDpi(point.X);
fspoint.v = ToTextDpi(point.Y);
return fspoint;
}
// -----------------------------------------------------------------
// Convert size from logical measurement unit to text measurement unit.
// ------------------------------------------------------------------
internal static PTS.FSVECTOR ToTextSize(Size size)
{
PTS.FSVECTOR fsvector = new PTS.FSVECTOR();
fsvector.du = ToTextDpi(size.Width);
fsvector.dv = ToTextDpi(size.Height);
return fsvector;
}
// ------------------------------------------------------------------
// Convert rect from text measurement unit to logical measurement unit.
// -----------------------------------------------------------------
internal static Rect FromTextRect(PTS.FSRECT fsrect)
{
return new Rect(
FromTextDpi(fsrect.u),
FromTextDpi(fsrect.v),
FromTextDpi(fsrect.du),
FromTextDpi(fsrect.dv));
}
// ------------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for offset
// within a line.
// -----------------------------------------------------------------
internal static void EnsureValidLineOffset(ref double offset)
{
// Offset has to be > min allowed size && < max allowed size.
if (offset > _maxSize) { offset = _maxSize; }
else if (offset < -_maxSize) { offset = -_maxSize; }
}
// -----------------------------------------------------------------
// Snaps the value to TextDPi, makeing sure that convertion to
// TextDpi and the to double produces the same value.
// -----------------------------------------------------------------
internal static void SnapToTextDpi(ref Size size)
{
size = new Size(FromTextDpi(ToTextDpi(size.Width)), FromTextDpi(ToTextDpi(size.Height)));
}
// ------------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for line width.
// -----------------------------------------------------------------
internal static void EnsureValidLineWidth(ref double width)
{
// Line width has to be > 0 && < max allowed size.
if (width > _maxSize) { width = _maxSize; }
else if (width < _minSize) { width = _minSize; }
}
internal static void EnsureValidLineWidth(ref Size size)
{
// Line width has to be > 0 && < max allowed size.
if (size.Width > _maxSize) { size.Width = _maxSize; }
else if (size.Width < _minSize) { size.Width = _minSize; }
}
internal static void EnsureValidLineWidth(ref int width)
{
// Line width has to be > 0 && < max allowed size.
if (width > _maxSizeInt) { width = _maxSizeInt; }
else if (width < _minSizeInt) { width = _minSizeInt; }
}
// ------------------------------------------------------------------
// Make sure that PTS limitations are not exceeded for page size.
// ------------------------------------------------------------------
internal static void EnsureValidPageSize(ref Size size)
{
// Page size has to be > 0 && < max allowed size.
if (size.Width > _maxSize) { size.Width = _maxSize; }
else if (size.Width < _minSize) { size.Width = _minSize; }
if (size.Height > _maxSize) { size.Height = _maxSize; }
else if (size.Height < _minSize) { size.Height = _minSize; }
}
internal static void EnsureValidPageWidth(ref double width)
{
// Page size has to be > 0 && < max allowed size.
if (width > _maxSize) { width = _maxSize; }
else if (width < _minSize) { width = _minSize; }
}
internal static void EnsureValidPageMargin(ref Thickness pageMargin, Size pageSize)
{
if (pageMargin.Left >= pageSize.Width) { pageMargin.Right = 0.0; }
if (pageMargin.Left + pageMargin.Right >= pageSize.Width)
{
pageMargin.Right = Math.Max(0.0, pageSize.Width - pageMargin.Left - _minSize);
if (pageMargin.Left + pageMargin.Right >= pageSize.Width)
{
pageMargin.Left = pageSize.Width - _minSize;
}
}
if (pageMargin.Top >= pageSize.Height) { pageMargin.Bottom = 0.0; }
if (pageMargin.Top + pageMargin.Bottom >= pageSize.Height)
{
pageMargin.Bottom = Math.Max(0.0, pageSize.Height - pageMargin.Top - _minSize);;
if (pageMargin.Top + pageMargin.Bottom >= pageSize.Height)
{
pageMargin.Top = pageSize.Height - _minSize;
}
}
}
// -----------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for object's size.
// ------------------------------------------------------------------
internal static void EnsureValidObjSize(ref Size size)
{
// Embedded object can have size == 0, but its width and height
// have to be less than max allowed size.
if (size.Width > _maxObjSize) { size.Width = _maxObjSize; }
if (size.Height > _maxObjSize) { size.Height = _maxObjSize; }
}
// -----------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded.
// -----------------------------------------------------------------
static TextDpi()
{
_scale = 300.0;
_maxSizeInt = 0x3ffffffe;
_minSizeInt = 0x00000001;
_maxSize = ((double)_maxSizeInt) / _scale; // = 3,579,139.40 pixels
_minSize = ((double)_minSizeInt) / _scale; // > 0
_maxObjSize = _maxSize / 3; // = 1,193,046.46 pixels
}
// -----------------------------------------------------------------
// Measuring unit for PTS presenters is int, but logical measuring
// for the rest of the system is is double.
// Logical measuring dpi = 96
// PTS presenters measuring dpi = 28800
// ------------------------------------------------------------------
private static double _scale;
// -----------------------------------------------------------------
// PTS/LS limitation for max size.
// ------------------------------------------------------------------
private static int _maxSizeInt;
private static double _maxSize;
// ------------------------------------------------------------------
// PTS/LS limitation for min size.
// -----------------------------------------------------------------
private static int _minSizeInt;
private static double _minSize;
// ------------------------------------------------------------------
// Embedded object size is limited to 1/3 of max size accepted by LS/PTS.
// -----------------------------------------------------------------
private static double _maxObjSize;
}
#if TEXTLAYOUTDEBUG
// ---------------------------------------------------------------------
// Pefrormance debugging helpers.
// ---------------------------------------------------------------------
internal static class TextDebug
{
// ------------------------------------------------------------------
// Enter the scope and log the message.
// -----------------------------------------------------------------
internal static void BeginScope(string name)
{
Log(name);
++_indent;
}
// ------------------------------------------------------------------
// Exit the current scope.
// ------------------------------------------------------------------
internal static void EndScope()
{
--_indent;
}
// -----------------------------------------------------------------
// Log message.
// ------------------------------------------------------------------
internal static void Log(string msg)
{
Console.WriteLine("> " + CurrentIndent + msg);
}
// -----------------------------------------------------------------
// String representing current indent.
// -----------------------------------------------------------------
private static string CurrentIndent { get { return new string(' ', _indent * 2); } }
// -----------------------------------------------------------------
// Current indent.
// ------------------------------------------------------------------
private static int _indent;
}
#endif // TEXTLAYOUTDEBUG
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: TextDpi.cs
//
// Description: Helpers to handle text dpi conversions and limitations.
//
// History:
// 04/25/2003 : [....] - moving from Avalon branch.
//
//---------------------------------------------------------------------------
using System; // Double, ...
using System.Windows; // DependencyObject
using System.Windows.Documents; // TextElement, ...
using System.Windows.Media; // FontFamily
using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS
namespace MS.Internal.Text
{
// ---------------------------------------------------------------------
// Helpers to handle text dpi conversions and limitations.
// ---------------------------------------------------------------------
internal static class TextDpi
{
// ------------------------------------------------------------------
// Minimum width for text measurement.
// -----------------------------------------------------------------
internal static double MinWidth { get { return _minSize; } }
// ------------------------------------------------------------------
// Maximum width for text measurement.
// ------------------------------------------------------------------
internal static double MaxWidth { get { return _maxSize; } }
// -----------------------------------------------------------------
// Convert from logical measurement unit to text measurement unit.
//
// d - value in logical measurement unit
//
// Returns: value in text measurement unit.
// ------------------------------------------------------------------
internal static int ToTextDpi(double d)
{
if (DoubleUtil.IsZero(d)) { return 0; }
else if (d > 0)
{
if (d > _maxSize) { d = _maxSize; }
else if (d < _minSize) { d = _minSize; }
}
else
{
if (d < -_maxSize) { d = -_maxSize; }
else if (d > -_minSize) { d = -_minSize; }
}
return (int)Math.Round(d * _scale);
}
// -----------------------------------------------------------------
// Convert from text measurement unit to logical measurement unit.
//
// i - value in text measurement unit
//
// Returns: value in logical measurement unit.
// -----------------------------------------------------------------
internal static double FromTextDpi(int i)
{
return ((double)i) / _scale;
}
// -----------------------------------------------------------------
// Convert point from logical measurement unit to text measurement unit.
// ------------------------------------------------------------------
internal static PTS.FSPOINT ToTextPoint(Point point)
{
PTS.FSPOINT fspoint = new PTS.FSPOINT();
fspoint.u = ToTextDpi(point.X);
fspoint.v = ToTextDpi(point.Y);
return fspoint;
}
// -----------------------------------------------------------------
// Convert size from logical measurement unit to text measurement unit.
// ------------------------------------------------------------------
internal static PTS.FSVECTOR ToTextSize(Size size)
{
PTS.FSVECTOR fsvector = new PTS.FSVECTOR();
fsvector.du = ToTextDpi(size.Width);
fsvector.dv = ToTextDpi(size.Height);
return fsvector;
}
// ------------------------------------------------------------------
// Convert rect from text measurement unit to logical measurement unit.
// -----------------------------------------------------------------
internal static Rect FromTextRect(PTS.FSRECT fsrect)
{
return new Rect(
FromTextDpi(fsrect.u),
FromTextDpi(fsrect.v),
FromTextDpi(fsrect.du),
FromTextDpi(fsrect.dv));
}
// ------------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for offset
// within a line.
// -----------------------------------------------------------------
internal static void EnsureValidLineOffset(ref double offset)
{
// Offset has to be > min allowed size && < max allowed size.
if (offset > _maxSize) { offset = _maxSize; }
else if (offset < -_maxSize) { offset = -_maxSize; }
}
// -----------------------------------------------------------------
// Snaps the value to TextDPi, makeing sure that convertion to
// TextDpi and the to double produces the same value.
// -----------------------------------------------------------------
internal static void SnapToTextDpi(ref Size size)
{
size = new Size(FromTextDpi(ToTextDpi(size.Width)), FromTextDpi(ToTextDpi(size.Height)));
}
// ------------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for line width.
// -----------------------------------------------------------------
internal static void EnsureValidLineWidth(ref double width)
{
// Line width has to be > 0 && < max allowed size.
if (width > _maxSize) { width = _maxSize; }
else if (width < _minSize) { width = _minSize; }
}
internal static void EnsureValidLineWidth(ref Size size)
{
// Line width has to be > 0 && < max allowed size.
if (size.Width > _maxSize) { size.Width = _maxSize; }
else if (size.Width < _minSize) { size.Width = _minSize; }
}
internal static void EnsureValidLineWidth(ref int width)
{
// Line width has to be > 0 && < max allowed size.
if (width > _maxSizeInt) { width = _maxSizeInt; }
else if (width < _minSizeInt) { width = _minSizeInt; }
}
// ------------------------------------------------------------------
// Make sure that PTS limitations are not exceeded for page size.
// ------------------------------------------------------------------
internal static void EnsureValidPageSize(ref Size size)
{
// Page size has to be > 0 && < max allowed size.
if (size.Width > _maxSize) { size.Width = _maxSize; }
else if (size.Width < _minSize) { size.Width = _minSize; }
if (size.Height > _maxSize) { size.Height = _maxSize; }
else if (size.Height < _minSize) { size.Height = _minSize; }
}
internal static void EnsureValidPageWidth(ref double width)
{
// Page size has to be > 0 && < max allowed size.
if (width > _maxSize) { width = _maxSize; }
else if (width < _minSize) { width = _minSize; }
}
internal static void EnsureValidPageMargin(ref Thickness pageMargin, Size pageSize)
{
if (pageMargin.Left >= pageSize.Width) { pageMargin.Right = 0.0; }
if (pageMargin.Left + pageMargin.Right >= pageSize.Width)
{
pageMargin.Right = Math.Max(0.0, pageSize.Width - pageMargin.Left - _minSize);
if (pageMargin.Left + pageMargin.Right >= pageSize.Width)
{
pageMargin.Left = pageSize.Width - _minSize;
}
}
if (pageMargin.Top >= pageSize.Height) { pageMargin.Bottom = 0.0; }
if (pageMargin.Top + pageMargin.Bottom >= pageSize.Height)
{
pageMargin.Bottom = Math.Max(0.0, pageSize.Height - pageMargin.Top - _minSize);;
if (pageMargin.Top + pageMargin.Bottom >= pageSize.Height)
{
pageMargin.Top = pageSize.Height - _minSize;
}
}
}
// -----------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded for object's size.
// ------------------------------------------------------------------
internal static void EnsureValidObjSize(ref Size size)
{
// Embedded object can have size == 0, but its width and height
// have to be less than max allowed size.
if (size.Width > _maxObjSize) { size.Width = _maxObjSize; }
if (size.Height > _maxObjSize) { size.Height = _maxObjSize; }
}
// -----------------------------------------------------------------
// Make sure that LS/PTS limitations are not exceeded.
// -----------------------------------------------------------------
static TextDpi()
{
_scale = 300.0;
_maxSizeInt = 0x3ffffffe;
_minSizeInt = 0x00000001;
_maxSize = ((double)_maxSizeInt) / _scale; // = 3,579,139.40 pixels
_minSize = ((double)_minSizeInt) / _scale; // > 0
_maxObjSize = _maxSize / 3; // = 1,193,046.46 pixels
}
// -----------------------------------------------------------------
// Measuring unit for PTS presenters is int, but logical measuring
// for the rest of the system is is double.
// Logical measuring dpi = 96
// PTS presenters measuring dpi = 28800
// ------------------------------------------------------------------
private static double _scale;
// -----------------------------------------------------------------
// PTS/LS limitation for max size.
// ------------------------------------------------------------------
private static int _maxSizeInt;
private static double _maxSize;
// ------------------------------------------------------------------
// PTS/LS limitation for min size.
// -----------------------------------------------------------------
private static int _minSizeInt;
private static double _minSize;
// ------------------------------------------------------------------
// Embedded object size is limited to 1/3 of max size accepted by LS/PTS.
// -----------------------------------------------------------------
private static double _maxObjSize;
}
#if TEXTLAYOUTDEBUG
// ---------------------------------------------------------------------
// Pefrormance debugging helpers.
// ---------------------------------------------------------------------
internal static class TextDebug
{
// ------------------------------------------------------------------
// Enter the scope and log the message.
// -----------------------------------------------------------------
internal static void BeginScope(string name)
{
Log(name);
++_indent;
}
// ------------------------------------------------------------------
// Exit the current scope.
// ------------------------------------------------------------------
internal static void EndScope()
{
--_indent;
}
// -----------------------------------------------------------------
// Log message.
// ------------------------------------------------------------------
internal static void Log(string msg)
{
Console.WriteLine("> " + CurrentIndent + msg);
}
// -----------------------------------------------------------------
// String representing current indent.
// -----------------------------------------------------------------
private static string CurrentIndent { get { return new string(' ', _indent * 2); } }
// -----------------------------------------------------------------
// Current indent.
// ------------------------------------------------------------------
private static int _indent;
}
#endif // TEXTLAYOUTDEBUG
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodeTypeOfExpression.cs
- CommandBindingCollection.cs
- LoadRetryHandler.cs
- invalidudtexception.cs
- PromptStyle.cs
- PageAsyncTask.cs
- ListViewHitTestInfo.cs
- ServiceDescriptionSerializer.cs
- DataGridViewColumnDesignTimeVisibleAttribute.cs
- CodeTypeParameter.cs
- SQLBytes.cs
- IsolatedStoragePermission.cs
- PermissionSetTriple.cs
- StickyNoteAnnotations.cs
- SAPICategories.cs
- InfoCard.cs
- indexingfiltermarshaler.cs
- ImageBrush.cs
- ChineseLunisolarCalendar.cs
- DecimalStorage.cs
- KeyboardEventArgs.cs
- OdbcReferenceCollection.cs
- XmlSchemaType.cs
- TransactionScope.cs
- Visitor.cs
- SBCSCodePageEncoding.cs
- TypedServiceOperationListItem.cs
- KoreanCalendar.cs
- X509ScopedServiceCertificateElementCollection.cs
- DecoderReplacementFallback.cs
- ToolStripOverflow.cs
- StdRegProviderWrapper.cs
- AnnotationResource.cs
- _DomainName.cs
- RequestBringIntoViewEventArgs.cs
- SmiMetaData.cs
- SafePointer.cs
- EncryptedHeaderXml.cs
- SevenBitStream.cs
- RegisteredExpandoAttribute.cs
- SimpleWebHandlerParser.cs
- Int64KeyFrameCollection.cs
- TemplateColumn.cs
- CollectionContainer.cs
- MetadataArtifactLoaderFile.cs
- OrderToken.cs
- CounterNameConverter.cs
- SqlUdtInfo.cs
- DesignSurfaceServiceContainer.cs
- COM2ComponentEditor.cs
- RegexNode.cs
- Animatable.cs
- CounterSample.cs
- AuthenticationException.cs
- BitmapEffect.cs
- DataGridViewCellLinkedList.cs
- COM2PictureConverter.cs
- PatternMatchRules.cs
- AspCompat.cs
- TextUtf8RawTextWriter.cs
- CodeTryCatchFinallyStatement.cs
- _NativeSSPI.cs
- NullEntityWrapper.cs
- CompiledQueryCacheKey.cs
- DataGridViewIntLinkedList.cs
- Directory.cs
- OnOperation.cs
- NestPullup.cs
- EntityDataSourceDesignerHelper.cs
- List.cs
- DecoderFallback.cs
- Debug.cs
- Win32.cs
- EmptyEnumerable.cs
- TypedDataSourceCodeGenerator.cs
- Encoder.cs
- DesignerActionList.cs
- EncryptedPackageFilter.cs
- IntPtr.cs
- ControlHelper.cs
- TdsRecordBufferSetter.cs
- AdCreatedEventArgs.cs
- DefaultAssemblyResolver.cs
- _NtlmClient.cs
- PageBuildProvider.cs
- HttpRequestTraceRecord.cs
- DtrList.cs
- BinaryFormatter.cs
- Help.cs
- PropertyItem.cs
- KnownBoxes.cs
- RepeatButtonAutomationPeer.cs
- SystemException.cs
- DataTrigger.cs
- TextServicesHost.cs
- TypeConstant.cs
- TextElementCollection.cs
- NumericUpDownAcceleration.cs
- Transform.cs
- WindowsClaimSet.cs