Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CommonUI / System / Drawing / SystemFonts.cs / 1 / SystemFonts.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Drawing { using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; using System.IO; ////// /// Selected system-wide fonts. /// public sealed class SystemFonts { private static readonly object SystemFontsKey = new object(); // Cannot be instantiated. private SystemFonts() { } ////// /// public static Font CaptionFont { get { Font captionFont = null; NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0); if (result && data.lfCaptionFont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { captionFont = Font.FromLogFont(data.lfCaptionFont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if( captionFont == null ) { captionFont = DefaultFont; } else if (captionFont.Unit != GraphicsUnit.Point) { captionFont = FontInPoints(captionFont); } } captionFont.SetSystemFontName("CaptionFont"); return captionFont; } } ////// Gets the system's font for captions. /// ////// /// public static Font SmallCaptionFont { get { Font smcaptionFont = null; NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0); if (result && data.lfSmCaptionFont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { smcaptionFont = Font.FromLogFont(data.lfSmCaptionFont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if( smcaptionFont == null ) { smcaptionFont = DefaultFont; } else if (smcaptionFont.Unit != GraphicsUnit.Point) { smcaptionFont = FontInPoints(smcaptionFont); } } smcaptionFont.SetSystemFontName("SmallCaptionFont"); return smcaptionFont; } } ////// Gets the system's font for small captions. /// ////// /// public static Font MenuFont { get { Font menuFont = null; NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0); if (result && data.lfMenuFont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { menuFont = Font.FromLogFont(data.lfMenuFont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if( menuFont == null ) { menuFont = DefaultFont; } else if (menuFont.Unit != GraphicsUnit.Point) { menuFont = FontInPoints(menuFont); } } menuFont.SetSystemFontName("MenuFont"); return menuFont; } } ////// Gets the system's font for menus. /// ////// /// public static Font StatusFont { get { Font statusFont = null; NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0); if (result && data.lfStatusFont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { statusFont = Font.FromLogFont(data.lfStatusFont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if( statusFont == null ) { statusFont = DefaultFont; } else if (statusFont.Unit != GraphicsUnit.Point) { statusFont = FontInPoints(statusFont); } } statusFont.SetSystemFontName("StatusFont"); return statusFont; } } ////// Gets the system's font for status bars. /// ////// /// public static Font MessageBoxFont { get { Font messageboxFont = null; NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0); if (result && data.lfMessageFont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { messageboxFont = Font.FromLogFont(data.lfMessageFont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if( messageboxFont == null ) { messageboxFont = DefaultFont; } else if (messageboxFont.Unit != GraphicsUnit.Point) { messageboxFont = FontInPoints(messageboxFont); } } messageboxFont.SetSystemFontName("MessageBoxFont"); return messageboxFont; } } ////// Gets the system's font for message boxes. /// ////// Determines whether the specified exception should be handled. /// private static bool IsCriticalFontException( Exception ex ){ return !( // In any of these cases we'll handle the exception. ex is ExternalException || ex is ArgumentException || ex is OutOfMemoryException || // GDI+ throws this one for many reasons other than actual OOM. ex is InvalidOperationException || ex is NotImplementedException || ex is FileNotFoundException ); } ////// /// public static Font IconTitleFont { get { Font icontitleFont = null; SafeNativeMethods.LOGFONT itfont = new SafeNativeMethods.LOGFONT(); bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETICONTITLELOGFONT, Marshal.SizeOf(itfont), itfont, 0); if (result && itfont != null) { // SECREVIEW : This assert is ok. The LOGFONT struct passed to Font.FromLogFont was obtained from the system. // IntSecurity.ObjectFromWin32Handle.Assert(); try { icontitleFont = Font.FromLogFont(itfont); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } finally { CodeAccessPermission.RevertAssert(); } if (icontitleFont == null ) { icontitleFont = DefaultFont; } else if (icontitleFont.Unit != GraphicsUnit.Point) { icontitleFont = FontInPoints(icontitleFont); } } icontitleFont.SetSystemFontName("IconTitleFont"); return icontitleFont; } } ////////////////////////////////////////////////////////////////////////////////////////////// // // // SystemFonts.DefaultFont is code moved from System.Windows.Forms.Control.DefaultFont // // System.Windows.Forms.Control.DefaultFont delegates to SystemFonts.DefaultFont now. // // Treat any changes to this code as you would treat breaking changes. // // // ////////////////////////////////////////////////////////////////////////////////////////////// ////// Gets the system's font for icon titles. /// ////// /// public static Font DefaultFont { get { Font defaultFont = null; //special case defaultfont for arabic systems too bool systemDefaultLCIDIsArabic = false; // For Japanese on Win9x get the MS UI Gothic font if (Environment.OSVersion.Platform == System.PlatformID.Win32NT && Environment.OSVersion.Version.Major <= 4) { if((UnsafeNativeMethods.GetSystemDefaultLCID() & 0x3ff) == 0x0011) { try { defaultFont = new Font("MS UI Gothic", 9); } //fall through here if this fails and we'll get the default //font via the DEFAULT_GUI method catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } } } if (defaultFont == null) { systemDefaultLCIDIsArabic = ((UnsafeNativeMethods.GetSystemDefaultLCID() & 0x3ff) == 0x0001); } // For arabic systems, regardless of the platform, always return Tahoma 8. // vsWhidbey 82453. if (systemDefaultLCIDIsArabic) { Debug.Assert(defaultFont == null); // Try TAHOMA 8 try { defaultFont = new Font("Tahoma", 8); } catch (Exception ex) { if( IsCriticalFontException(ex) ){ throw; } } } // // Neither Japanese on Win9x nor Arabic. // First try DEFAULT_GUI, then Tahoma 8, then GenericSansSerif 8. // // first, try DEFAULT_GUI font. // if (defaultFont == null) { IntPtr handle = UnsafeNativeMethods.GetStockObject(NativeMethods.DEFAULT_GUI_FONT); try { Font fontInWorldUnits = null; // SECREVIEW : We know that we got the handle from the stock object, // : so this is always safe. // IntSecurity.ObjectFromWin32Handle.Assert(); try { fontInWorldUnits = Font.FromHfont(handle); } finally { CodeAccessPermission.RevertAssert(); } try{ defaultFont = FontInPoints(fontInWorldUnits); } finally{ fontInWorldUnits.Dispose(); } } catch (ArgumentException) { } } // If DEFAULT_GUI didn't work, we try Tahoma. // if (defaultFont == null) { try { defaultFont = new Font("Tahoma", 8); } catch (ArgumentException) { } } // Last resort, we use the GenericSansSerif - this will // always work. // if (defaultFont == null) { defaultFont = new Font(FontFamily.GenericSansSerif, 8); } if (defaultFont.Unit != GraphicsUnit.Point) { defaultFont = FontInPoints(defaultFont); } Debug.Assert(defaultFont != null, "defaultFont wasn't set!"); defaultFont.SetSystemFontName("DefaultFont"); return defaultFont; } } ////// Gets the system's default font. /// ////// /// public static Font DialogFont { get { Font dialogFont = null; if((UnsafeNativeMethods.GetSystemDefaultLCID() & 0x3ff) == 0x0011) { // for JAPANESE culture always return DefaultFont dialogFont = DefaultFont; } else if (Environment.OSVersion.Platform == System.PlatformID.Win32Windows) { // use DefaultFont for Win9X dialogFont = DefaultFont; } else { try { // use Tahoma 8pt for anything else than Japanese and Win9x dialogFont = new Font("Tahoma", 8); } catch (ArgumentException) { } } if (dialogFont == null) { dialogFont = DefaultFont; } else if (dialogFont.Unit != GraphicsUnit.Point) { dialogFont = FontInPoints(dialogFont); } // // JAPANESE or Win9x: SystemFonts.DefaultFont returns a new Font object every time it is invoked. // So for JAPANESE or Win9x we return the DefaultFont w/ its SystemFontName set to DialogFont. // dialogFont.SetSystemFontName("DialogFont"); return dialogFont; } } //Copied from System.Windows.Forms.ControlPaint private static Font FontInPoints(Font font) { return new Font(font.FontFamily, font.SizeInPoints, font.Style, GraphicsUnit.Point, font.GdiCharSet, font.GdiVerticalFont); } ////// Gets the system's font for dialogs. /// ////// /// public static Font GetFontByName(string systemFontName) { if ("CaptionFont".Equals(systemFontName)) { return CaptionFont; } else if ("DefaultFont".Equals(systemFontName)) { return DefaultFont; } else if ("DialogFont".Equals(systemFontName)) { return DialogFont; } else if ("IconTitleFont".Equals(systemFontName)) { return IconTitleFont; } else if ("MenuFont".Equals(systemFontName)) { return MenuFont; } else if ("MessageBoxFont".Equals(systemFontName)) { return MessageBoxFont; } else if ("SmallCaptionFont".Equals(systemFontName)) { return SmallCaptionFont; } else if ("StatusFont".Equals(systemFontName)) { return StatusFont; } else { return null; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved./// Gets the ///that corresponds to a given SystemFont name. ///
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