Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / LinkUtilities.cs / 1 / LinkUtilities.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Drawing; using System.Windows.Forms; using Microsoft.Win32; using System.Globalization; using System.Security.Permissions; internal class LinkUtilities { // IE fonts and colors static Color ielinkColor = Color.Empty; static Color ieactiveLinkColor = Color.Empty; static Color ievisitedLinkColor = Color.Empty; const string IESettingsRegPath = "Software\\Microsoft\\Internet Explorer\\Settings"; public const string IEMainRegPath = "Software\\Microsoft\\Internet Explorer\\Main"; const string IEAnchorColor = "Anchor Color"; const string IEAnchorColorVisited = "Anchor Color Visited"; const string IEAnchorColorHover = "Anchor Color Hover"; ////// /// Retrieves a named IE color from the registry. There are constants at the top /// of this file of the valid names to retrieve. /// private static Color GetIEColor(string name) { // SECREVIEW : We are just reading the IE color settings from the registry... // // SECUNDONE : This assert doesn't work... assert everything for now... // //new RegistryPermission(RegistryPermissionAccess.Read, "HKCU\\" + IESettingsRegPath).Assert(); new RegistryPermission(PermissionState.Unrestricted).Assert(); try { RegistryKey key = Registry.CurrentUser.OpenSubKey(IESettingsRegPath); if (key != null) { // Since this comes from the registry, be very careful about its contents. // string s = (string)key.GetValue(name); if (s != null) { string[] rgbs = s.Split(new char[] {','}); int[] rgb = new int[3]; int nMax = Math.Min(rgb.Length, rgbs.Length); //NOTE: if we can't parse rgbs[i], rgb[i] will be set to 0. for (int i = 0; i < nMax; i++) { int.TryParse(rgbs[i], out rgb[i]); } return Color.FromArgb(rgb[0], rgb[1], rgb[2]); } } if (string.Equals(name, IEAnchorColor, StringComparison.OrdinalIgnoreCase)) { return Color.Blue; } else if (string.Equals(name, IEAnchorColorVisited, StringComparison.OrdinalIgnoreCase)) { return Color.Purple; } else if (string.Equals(name, IEAnchorColorHover, StringComparison.OrdinalIgnoreCase)) { return Color.Red; } else { return Color.Red; } } finally { System.Security.CodeAccessPermission.RevertAssert(); } } public static Color IELinkColor { get { if (ielinkColor.IsEmpty) { ielinkColor = GetIEColor(IEAnchorColor); } return ielinkColor; } } public static Color IEActiveLinkColor { get { if (ieactiveLinkColor.IsEmpty) { ieactiveLinkColor = GetIEColor(IEAnchorColorHover); } return ieactiveLinkColor; } } public static Color IEVisitedLinkColor { get { if (ievisitedLinkColor.IsEmpty) { ievisitedLinkColor = GetIEColor(IEAnchorColorVisited); } return ievisitedLinkColor; } } ////// /// Retrieves the IE settings for link behavior from the registry. /// public static LinkBehavior GetIELinkBehavior() { // SECREVIEW : We are just reading the IE color settings from the registry... // // SECUNDONE : This assert doesn't work... assert everything for now... // //new RegistryPermission(RegistryPermissionAccess.Read, "HKCU\\" + IEMainRegPath).Assert(); new RegistryPermission(PermissionState.Unrestricted).Assert(); try { RegistryKey key = Registry.CurrentUser.OpenSubKey(IEMainRegPath); if (key != null) { string s = (string)key.GetValue("Anchor Underline"); if (s != null && string.Compare(s, "no", true, CultureInfo.InvariantCulture) == 0) { return LinkBehavior.NeverUnderline; } if (s != null && string.Compare(s, "hover", true, CultureInfo.InvariantCulture) == 0) { return LinkBehavior.HoverUnderline; } else { return LinkBehavior.AlwaysUnderline; } } } finally { System.Security.CodeAccessPermission.RevertAssert(); } return LinkBehavior.AlwaysUnderline; } public static void EnsureLinkFonts(Font baseFont, LinkBehavior link, ref Font linkFont, ref Font hoverLinkFont) { if (linkFont != null && hoverLinkFont != null) { return; } bool underlineLink = true; bool underlineHover = true; if (link == LinkBehavior.SystemDefault) { link = GetIELinkBehavior(); } switch (link) { case LinkBehavior.AlwaysUnderline: underlineLink = true; underlineHover = true; break; case LinkBehavior.HoverUnderline: underlineLink = false; underlineHover = true; break; case LinkBehavior.NeverUnderline: underlineLink = false; underlineHover = false; break; } Font f = baseFont; // We optimize for the "same" value (never & always) to avoid creating an // extra font object. // if (underlineHover == underlineLink) { FontStyle style = f.Style; if (underlineHover) { style |= FontStyle.Underline; } else { style &= ~FontStyle.Underline; } hoverLinkFont = new Font(f, style); linkFont = hoverLinkFont; } else { FontStyle hoverStyle = f.Style; if (underlineHover) { hoverStyle |= FontStyle.Underline; } else { hoverStyle &= ~FontStyle.Underline; } hoverLinkFont = new Font(f, hoverStyle); FontStyle linkStyle = f.Style; if (underlineLink) { linkStyle |= FontStyle.Underline; } else { linkStyle &= ~FontStyle.Underline; } linkFont = new Font(f, linkStyle); } } } } // 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
- autovalidator.cs
- DeviceSpecificChoice.cs
- MergePropertyDescriptor.cs
- ApplicationBuildProvider.cs
- MethodCallConverter.cs
- SqlRewriteScalarSubqueries.cs
- CollectionViewGroupInternal.cs
- TypeExtensionConverter.cs
- BuildDependencySet.cs
- DesignerCategoryAttribute.cs
- XPathNodeHelper.cs
- MetafileHeaderWmf.cs
- WorkflowQueuingService.cs
- BinaryObjectReader.cs
- webproxy.cs
- TemplateField.cs
- XmlChildNodes.cs
- SQLConvert.cs
- FlowDocumentPageViewerAutomationPeer.cs
- GeometryGroup.cs
- QilBinary.cs
- BCLDebug.cs
- streamingZipPartStream.cs
- ADMembershipUser.cs
- Membership.cs
- ServicesUtilities.cs
- ExtensionWindowResizeGrip.cs
- ReferenceAssemblyAttribute.cs
- CommandEventArgs.cs
- DataGridViewComboBoxCell.cs
- KeyValuePair.cs
- EncoderNLS.cs
- ProfilePropertySettingsCollection.cs
- activationcontext.cs
- SqlProfileProvider.cs
- MessageDispatch.cs
- EntityConnectionStringBuilder.cs
- FileUtil.cs
- TreeBuilder.cs
- SafePointer.cs
- HyperLink.cs
- TextRangeBase.cs
- GradientStop.cs
- TreeViewDataItemAutomationPeer.cs
- CompiledXpathExpr.cs
- Msec.cs
- MemberInfoSerializationHolder.cs
- IMembershipProvider.cs
- FastEncoder.cs
- CodeConditionStatement.cs
- WebBaseEventKeyComparer.cs
- UnionCodeGroup.cs
- LocalValueEnumerator.cs
- DataBindEngine.cs
- ToolboxDataAttribute.cs
- BoolExpressionVisitors.cs
- PropertyFilterAttribute.cs
- CodeAccessPermission.cs
- HMACSHA512.cs
- ExpressionList.cs
- SoapExtensionTypeElementCollection.cs
- ObjectManager.cs
- ExpressionBuilderContext.cs
- RoutingExtension.cs
- TerminateSequenceResponse.cs
- AxisAngleRotation3D.cs
- DataGridBoolColumn.cs
- StoreAnnotationsMap.cs
- Scanner.cs
- WindowPattern.cs
- PeerToPeerException.cs
- IntegerValidator.cs
- ToolStripOverflow.cs
- Polyline.cs
- HitTestParameters3D.cs
- ObjectIDGenerator.cs
- WebScriptServiceHost.cs
- RewritingPass.cs
- XmlNamedNodeMap.cs
- FtpRequestCacheValidator.cs
- ErrorTableItemStyle.cs
- ListViewTableRow.cs
- ScalarType.cs
- Encoding.cs
- GraphicsContainer.cs
- ProgressBarAutomationPeer.cs
- DataSourceIDConverter.cs
- XmlMemberMapping.cs
- EditingMode.cs
- ProviderException.cs
- ListViewContainer.cs
- LocalizableResourceBuilder.cs
- ReferentialConstraint.cs
- TextEffectCollection.cs
- Formatter.cs
- CFGGrammar.cs
- ExtentKey.cs
- ScriptComponentDescriptor.cs
- EasingKeyFrames.cs
- QueryCacheEntry.cs