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//------------------------------------------------------------------------------
// <copyright file="TableLayout.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
[assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.MSInternal", "CA905:SystemAndMicrosoftNamespacesRequireApproval", Scope="namespace", Target="System.Windows.Forms.Layout")]
namespace System.Windows.Forms.Layout {
using System;
using System.ComponentModel;
using System.Xml;
using System.Text;
using System.Globalization;
using System.Diagnostics;
using System.ComponentModel.Design.Serialization;
public class TableLayoutSettingsTypeConverter : TypeConverter {
/// <include file='doc\LinkConverter.uex' path='docs/doc[@for="LinkConverter.CanConvertFrom"]/*' />
/// <devdoc>
/// Determines if this converter can convert an object in the given source
/// type to the native type of the converter.
/// </devdoc>
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
if (sourceType == typeof(string)) {
return true;
}
return base.CanConvertFrom(context, sourceType);
}
/// <include file='doc\LinkConverter.uex' path='docs/doc[@for="LinkConverter.CanConvertTo"]/*' />
/// <devdoc>
/// <para>Gets a value indicating whether this converter can
/// convert an object to the given destination type using the context.</para>
/// </devdoc>
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (destinationType == typeof(InstanceDescriptor) || destinationType == typeof(string)) {
return true;
}
return base.CanConvertTo(context, destinationType);
}
/// <include file='doc\LinkConverter.uex' path='docs/doc[@for="LinkConverter.ConvertFrom"]/*' />
/// <devdoc>
/// Converts the given object to the converter's native type.
/// </devdoc>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
if (value is string) {
XmlDocument tableLayoutSettingsXml = new XmlDocument();
tableLayoutSettingsXml.LoadXml(value as string);
TableLayoutSettings settings = new TableLayoutSettings();
ParseControls(settings, tableLayoutSettingsXml.GetElementsByTagName("Control"));
ParseStyles(settings, tableLayoutSettingsXml.GetElementsByTagName("Columns"), /*isColumn=*/true);
ParseStyles(settings, tableLayoutSettingsXml.GetElementsByTagName("Rows"), /*isColumn=*/false);
return settings;
}
return base.ConvertFrom(context, culture, value);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
if (destinationType == null) {
throw new ArgumentNullException("destinationType");
}
if (value is TableLayoutSettings && (destinationType == typeof(string))) {
TableLayoutSettings tableLayoutSettings = value as TableLayoutSettings;
StringBuilder xmlStringBuilder = new StringBuilder();
XmlWriter xmlWriter = XmlWriter.Create(xmlStringBuilder);
xmlWriter.WriteStartElement("TableLayoutSettings");
//
// write controls
//
xmlWriter.WriteStartElement("Controls");
foreach (TableLayoutSettings.ControlInformation c in tableLayoutSettings.GetControlsInformation()) {
xmlWriter.WriteStartElement("Control");
xmlWriter.WriteAttributeString("Name", c.Name.ToString());
xmlWriter.WriteAttributeString("Row",c.Row.ToString(CultureInfo.CurrentCulture));
xmlWriter.WriteAttributeString("RowSpan", c.RowSpan.ToString(CultureInfo.CurrentCulture));
xmlWriter.WriteAttributeString("Column", c.Column.ToString(CultureInfo.CurrentCulture));
xmlWriter.WriteAttributeString("ColumnSpan", c.ColumnSpan.ToString(CultureInfo.CurrentCulture));
xmlWriter.WriteEndElement();
}
xmlWriter.WriteEndElement(); // end Controls
//
// write columns
//
xmlWriter.WriteStartElement("Columns");
StringBuilder columnStyles = new StringBuilder();
foreach (ColumnStyle colStyle in tableLayoutSettings.ColumnStyles) {
columnStyles.AppendFormat("{0},{1},", colStyle.SizeType, colStyle.Width);
}
if (columnStyles.Length > 0) {
columnStyles.Remove(columnStyles.Length - 1, 1);
}
xmlWriter.WriteAttributeString("Styles", columnStyles.ToString());
xmlWriter.WriteEndElement(); // end columns
//
// write rows
//
xmlWriter.WriteStartElement("Rows");
StringBuilder rowStyles = new StringBuilder();
foreach (RowStyle rowStyle in tableLayoutSettings.RowStyles) {
rowStyles.AppendFormat("{0},{1},", rowStyle.SizeType, rowStyle.Height);
}
if (rowStyles.Length > 0) {
rowStyles.Remove(rowStyles.Length - 1, 1);
}
xmlWriter.WriteAttributeString("Styles", rowStyles.ToString());
xmlWriter.WriteEndElement(); // end Rows
xmlWriter.WriteEndElement(); // end TableLayoutSettings
xmlWriter.Close();
return xmlStringBuilder.ToString();
}
return base.ConvertTo(context, culture, value, destinationType);
}
private string GetAttributeValue(XmlNode node, string attribute) {
XmlAttribute attr = node.Attributes[attribute];
if (attr != null) {
return attr.Value;
}
return null;
}
private int GetAttributeValue(XmlNode node, string attribute, int valueIfNotFound) {
string attributeValue = GetAttributeValue(node, attribute);
if (!string.IsNullOrEmpty(attributeValue)) {
int result;
if (Int32.TryParse(attributeValue, out result)) {
return result;
}
// dont throw because we should just gracefully fall back to valueIfNotFound;
Debug.Fail(string.Format(CultureInfo.CurrentCulture, "Failed to parse int: {0}", attributeValue));
}
return valueIfNotFound;
}
private void ParseControls(TableLayoutSettings settings, XmlNodeList controlXmlFragments) {
foreach (XmlNode controlXmlNode in controlXmlFragments) {
string name = GetAttributeValue(controlXmlNode, "Name");
if (!string.IsNullOrEmpty(name)) {
int row = GetAttributeValue(controlXmlNode, "Row", /*default*/-1);
int rowSpan = GetAttributeValue(controlXmlNode, "RowSpan", /*default*/1);
int column = GetAttributeValue(controlXmlNode, "Column", /*default*/-1);
int columnSpan = GetAttributeValue(controlXmlNode, "ColumnSpan",/*default*/1);
settings.SetRow(name, row);
settings.SetColumn(name, column);
settings.SetRowSpan(name, rowSpan);
settings.SetColumnSpan(name, columnSpan);
}
}
}
private void ParseStyles(TableLayoutSettings settings, XmlNodeList controlXmlFragments, bool columns) {
foreach (XmlNode styleXmlNode in controlXmlFragments) {
string styleString = GetAttributeValue(styleXmlNode, "Styles");
Type sizeTypeType = typeof(SizeType);
// styleString will consist of N Column/Row styles serialized in the following format
// (Percent | Absolute | AutoSize), (24 | 24.4 | 24,4)
// Two examples:
// Percent,23.3,Percent,46.7,Percent,30
// Percent,23,3,Percent,46,7,Percent,30
// Note we get either . or , based on the culture the TableLayoutSettings were serialized in
if (!string.IsNullOrEmpty(styleString)) {
int currentIndex = 0;
int nextIndex;
while (currentIndex < styleString.Length) {
// ---- SizeType Parsing -----------------
nextIndex = currentIndex;
while (Char.IsLetter(styleString[nextIndex])) {
nextIndex++;
}
SizeType type = (SizeType)Enum.Parse(sizeTypeType, styleString.Substring(currentIndex, nextIndex - currentIndex), true);
// ----- Float Parsing --------------
// Find the next Digit (start of the float)
while (!char.IsDigit(styleString[nextIndex])) {
nextIndex++;
}
// Append digits left of the decimal delimiter(s)
StringBuilder floatStringBuilder = new StringBuilder();
while ((nextIndex < styleString.Length) && (char.IsDigit(styleString[nextIndex]))) {
floatStringBuilder.Append(styleString[nextIndex]);
nextIndex++;
}
// Append culture invariant delimiter
floatStringBuilder.Append('.');
// Append digits right of the decimal delimiter(s)
while ((nextIndex < styleString.Length) && (!char.IsLetter(styleString[nextIndex]))) {
if (char.IsDigit(styleString[nextIndex])) {
floatStringBuilder.Append(styleString[nextIndex]);
}
nextIndex++;
}
string floatString = floatStringBuilder.ToString();
float width;
if (!float.TryParse(floatString, NumberStyles.Float, CultureInfo.InvariantCulture.NumberFormat, out width)) {
Debug.Fail(string.Format(CultureInfo.CurrentCulture, "Failed to parse float for style: {0}", floatString));
width = 0F;
}
// Add new Column/Row Style
if (columns) {
settings.ColumnStyles.Add(new ColumnStyle(type, width));
}
else {
settings.RowStyles.Add(new RowStyle(type, width));
}
// Go to the next Column/Row Style
currentIndex = nextIndex;
}
}
}
}
}
}
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