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//------------------------------------------------------------------------------
// <copyright file="MenuAdapter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls.Adapters {
using System;
using System.Diagnostics;
using System.Globalization;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
public class MenuAdapter : WebControlAdapter, IPostBackEventHandler {
private string _path;
private Panel _menuPanel;
private int _currentAccessKey = 0;
private MenuItem _titleItem;
protected new Menu Control {
get {
return (Menu) base.Control;
}
}
protected internal override void LoadAdapterControlState(Object state) {
if (state != null) {
Pair pairState = state as Pair;
if (pairState != null) {
base.LoadAdapterViewState(pairState.First);
_path = (string)pairState.Second;
}
else {
base.LoadAdapterViewState(null);
_path = state as string;
}
}
}
private string Escape(string path) {
// This function escapes \\ so that they don't get replaced because of
// a Netscape 4 bug. Other escapable characters will be escaped by .
// _ becomes __ and \\ becomes \_\
StringBuilder b = null;
if (String.IsNullOrEmpty(path)) {
return String.Empty;
}
int startIndex = 0;
int count = 0;
for (int i = 0; i < path.Length; i++) {
switch (path[i]) {
case '\\':
if (i + 1 < path.Length && path[i + 1] == '\\') {
if (b == null) {
b = new StringBuilder(path.Length + 5);
}
if (count > 0) {
b.Append(path, startIndex, count);
}
b.Append(@"\_\");
i++;
startIndex = i + 1;
count = 0;
}
else {
count++;
}
break;
case '_':
if (b == null) {
b = new StringBuilder(path.Length + 5);
}
if (count > 0) {
b.Append(path, startIndex, count);
}
b.Append("__");
startIndex = i + 1;
count = 0;
break;
default:
count++;
break;
}
}
if (b == null) {
return path;
}
if (count > 0) {
b.Append(path, startIndex, count);
}
return b.ToString();
}
private string UnEscape(string path) {
return path.Replace(@"\\", @"\").Replace(@"\_\", @"\\").Replace("__", "_");
}
protected internal override void OnInit(EventArgs e) {
base.OnInit(e);
Control.Page.RegisterRequiresControlState(Control);
}
protected internal override void OnPreRender(EventArgs e) {
Control.OnPreRender(e, false);
}
protected internal override object SaveAdapterControlState() {
object baseState = base.SaveAdapterViewState();
if (baseState == null) {
if (_path != null) {
return _path;
}
else {
return null;
}
}
else {
return new Pair(baseState, _path);
}
}
private void RenderBreak(HtmlTextWriter writer) {
if (Control.Orientation == Orientation.Vertical) {
writer.WriteBreak();
}
else {
writer.Write(' ');
}
}
protected override void RenderBeginTag(HtmlTextWriter writer) {
Menu owner = Control;
// skip link
if (owner.SkipLinkText.Length != 0) {
HyperLink skipLink = new HyperLink();
skipLink.NavigateUrl = '#' + owner.ClientID + "_SkipLink";
skipLink.ImageUrl = owner.SpacerImageUrl;
skipLink.Text = owner.SkipLinkText;
skipLink.Height = Unit.Pixel(1);
skipLink.Width = Unit.Pixel(1);
skipLink.Page = Page;
skipLink.RenderControl(writer);
}
_menuPanel = new Panel();
_menuPanel.ID = owner.UniqueID;
_menuPanel.Page = Page;
// Determine root menu style
MenuItem titleItem;
if (_path != null) {
titleItem = owner.Items.FindItem(_path.Split(TreeView.InternalPathSeparator), 0);
_titleItem = titleItem;
}
else {
titleItem = owner.RootItem;
}
SubMenuStyle rootMenuStyle = owner.GetSubMenuStyle(titleItem);
if (!rootMenuStyle.IsEmpty) {
if (Page != null && Page.SupportsStyleSheets) {
string styleClass = owner.GetSubMenuCssClassName(titleItem);
if (styleClass.Trim().Length > 0) {
_menuPanel.CssClass = styleClass;
}
}
else {
_menuPanel.ApplyStyle(rootMenuStyle);
}
}
_menuPanel.Width = owner.Width;
_menuPanel.Height = owner.Height;
_menuPanel.Enabled = owner.IsEnabled;
_menuPanel.RenderBeginTag(writer);
}
protected override void RenderContents(HtmlTextWriter writer) {
Menu owner = Control;
int position = 0;
if (_titleItem != null) {
if (_titleItem.Depth + 1 >= owner.MaximumDepth) {
throw new InvalidOperationException(SR.GetString(SR.Menu_InvalidDepth));
}
if (!_titleItem.IsEnabled) {
throw new InvalidOperationException(SR.GetString(SR.Menu_InvalidNavigation));
}
RenderItem(writer, _titleItem, position++);
foreach (MenuItem child in _titleItem.ChildItems) {
RenderItem(writer, child, position++);
}
if (PageAdapter != null) {
PageAdapter.RenderPostBackEvent(writer,
owner.UniqueID,
"u",
SR.GetString(SR.MenuAdapter_Up),
SR.GetString(SR.MenuAdapter_UpOneLevel));
}
else {
HyperLink link = new HyperLink();
link.NavigateUrl = Page.ClientScript.GetPostBackClientHyperlink(owner, "u");
link.Text = SR.GetString(SR.MenuAdapter_UpOneLevel);
link.Page = Page;
link.RenderControl(writer);
}
return;
}
else {
position = 1;
}
_path = null;
foreach(MenuItem child in owner.Items) {
RenderItem(writer, child, position++);
if (owner.StaticDisplayLevels > 1 && child.ChildItems.Count > 0) {
RenderContentsRecursive(writer, child, 1, owner.StaticDisplayLevels);
}
}
}
private void RenderContentsRecursive(HtmlTextWriter writer, MenuItem parentItem, int depth, int maxDepth) {
int position = 1;
foreach(MenuItem child in parentItem.ChildItems) {
RenderItem(writer, child, position++);
if (depth + 1 < maxDepth && child.ChildItems.Count > 0) {
RenderContentsRecursive(writer, child, depth + 1, maxDepth);
}
}
}
protected override void RenderEndTag(HtmlTextWriter writer) {
_menuPanel.RenderEndTag(writer);
// skip link
if (Control.SkipLinkText.Length != 0) {
HtmlAnchor skipAnchor = new HtmlAnchor();
skipAnchor.Name = Control.ClientID + "_SkipLink";
skipAnchor.Page = Page;
skipAnchor.RenderControl(writer);
}
}
private void RenderExpand(HtmlTextWriter writer, MenuItem item, Menu owner) {
string expandImageUrl = item.GetExpandImageUrl();
if (expandImageUrl.Length > 0) {
Image expandImage = new Image();
expandImage.ImageUrl = expandImageUrl;
expandImage.GenerateEmptyAlternateText = true;
if (item.Depth < owner.StaticDisplayLevels) {
expandImage.AlternateText = String.Format(
CultureInfo.CurrentCulture,
owner.StaticPopOutImageTextFormatString,
item.Text);
}
else {
expandImage.AlternateText = String.Format(
CultureInfo.CurrentCulture,
owner.DynamicPopOutImageTextFormatString,
item.Text);
}
// expandImage.ImageAlign = ImageAlign.Right;
expandImage.ImageAlign = ImageAlign.AbsMiddle;
expandImage.Page = Page;
expandImage.RenderControl(writer);
}
else {
writer.Write(' ');
if (item.Depth < owner.StaticDisplayLevels &&
owner.StaticPopOutImageTextFormatString.Length != 0) {
writer.Write(HttpUtility.HtmlEncode(String.Format(
CultureInfo.CurrentCulture,
owner.StaticPopOutImageTextFormatString,
item.Text)));
}
else if (item.Depth >= owner.StaticDisplayLevels &&
owner.DynamicPopOutImageTextFormatString.Length != 0) {
writer.Write(HttpUtility.HtmlEncode(String.Format(
CultureInfo.CurrentCulture,
owner.DynamicPopOutImageTextFormatString,
item.Text)));
}
else {
writer.Write(HttpUtility.HtmlEncode(SR.GetString(SR.MenuAdapter_Expand, item.Text)));
}
}
}
protected virtual internal void RenderItem(HtmlTextWriter writer, MenuItem item, int position) {
Menu owner = Control;
MenuItemStyle mergedStyle = owner.GetMenuItemStyle(item);
string imageUrl = item.ImageUrl;
int depth = item.Depth;
int depthPlusOne = depth + 1;
string toolTip = item.ToolTip;
string navigateUrl = item.NavigateUrl;
string text = item.Text;
bool enabled = item.IsEnabled;
bool selectable = item.Selectable;
MenuItemCollection childItems = item.ChildItems;
// Top separator
string topSeparatorUrl = null;
if (depth < owner.StaticDisplayLevels && owner.StaticTopSeparatorImageUrl.Length != 0) {
topSeparatorUrl = owner.StaticTopSeparatorImageUrl;
}
else if (depth >= owner.StaticDisplayLevels && owner.DynamicTopSeparatorImageUrl.Length != 0) {
topSeparatorUrl = owner.DynamicTopSeparatorImageUrl;
}
if (topSeparatorUrl != null) {
Image separatorImage = new Image();
separatorImage.ImageUrl = topSeparatorUrl;
separatorImage.GenerateEmptyAlternateText = true; // XHtml compliance
separatorImage.Page = Page;
separatorImage.RenderControl(writer);
RenderBreak(writer);
}
// Don't render the top spacing if this is the first root item
if ((mergedStyle != null) && !mergedStyle.ItemSpacing.IsEmpty &&
((_titleItem != null) || (position != 0))) {
RenderSpace(writer, mergedStyle.ItemSpacing, owner.Orientation);
}
// Item span
Panel itemPanel = new SpanPanel();
itemPanel.Enabled = enabled;
itemPanel.Page = Page;
// Apply styles
if (Page != null && Page.SupportsStyleSheets) {
string styleClass = owner.GetCssClassName(item, false);
if (styleClass.Trim().Length > 0) {
itemPanel.CssClass = styleClass;
}
}
else if (mergedStyle != null) {
itemPanel.ApplyStyle(mergedStyle);
}
// Tooltip
if (item.ToolTip.Length != 0) {
itemPanel.ToolTip = item.ToolTip;
}
// Render item begin tag
itemPanel.RenderBeginTag(writer);
// If there is a navigation url on this item, set up the navigation stuff if:
// - the item is the current title item for this level
// - the item has no children
// - the item is a static item of depth + 1 < StaticDisplayLevels
bool clickOpensThisNode = !((position == 0) ||
(childItems.Count == 0) ||
(depthPlusOne < owner.StaticDisplayLevels) ||
(depthPlusOne >= owner.MaximumDepth));
// Indent
if (position != 0 &&
depth > 0 &&
owner.StaticSubMenuIndent != Unit.Pixel(0) &&
depth < owner.StaticDisplayLevels) {
Image spacerImage = new Image();
spacerImage.ImageUrl = owner.SpacerImageUrl;
spacerImage.GenerateEmptyAlternateText = true; // XHtml compliance
double indent = owner.StaticSubMenuIndent.Value * depth;
if (indent < Unit.MaxValue) {
spacerImage.Width = new Unit(indent, owner.StaticSubMenuIndent.Type);
}
else {
spacerImage.Width = new Unit(Unit.MaxValue, owner.StaticSubMenuIndent.Type);;
}
spacerImage.Height = Unit.Pixel(1);
spacerImage.Page = Page;
spacerImage.RenderControl(writer);
}
// Render out the item icon, if it is set and if the item is not templated (VSWhidbey 501618)
if (imageUrl.Length > 0 && item.NotTemplated()) {
Image newImage = new Image();
newImage.ImageUrl = imageUrl;
if (toolTip.Length != 0) {
newImage.AlternateText = toolTip;
}
else {
newImage.GenerateEmptyAlternateText = true; // XHtml compliance
}
newImage.Page = Page;
newImage.RenderControl(writer);
writer.Write(' ');
}
bool applyInlineBorder;
string linkClass;
if (Page != null && Page.SupportsStyleSheets) {
linkClass = owner.GetCssClassName(item, true, out applyInlineBorder);
}
else {
linkClass = String.Empty;
applyInlineBorder = false;
}
if (enabled && (clickOpensThisNode || selectable)) {
string accessKey = owner.AccessKey;
string itemAccessKey = ((position == 0 || (position == 1 && depth == 0)) && accessKey.Length != 0) ?
accessKey :
null;
if (navigateUrl.Length > 0 && !clickOpensThisNode) {
if (PageAdapter != null) {
PageAdapter.RenderBeginHyperlink(writer,
owner.ResolveClientUrl(navigateUrl),
true,
SR.GetString(SR.Adapter_GoLabel),
itemAccessKey != null ?
itemAccessKey :
(_currentAccessKey < 10 ?
(_currentAccessKey++).ToString(CultureInfo.InvariantCulture) :
null));
writer.Write(HttpUtility.HtmlEncode(item.FormattedText));
PageAdapter.RenderEndHyperlink(writer);
}
else {
HyperLink link = new HyperLink();
link.NavigateUrl = owner.ResolveClientUrl(navigateUrl);
string target = item.Target;
if (String.IsNullOrEmpty(target)) {
target = owner.Target;
}
if (!String.IsNullOrEmpty(target)) {
link.Target = target;
}
link.AccessKey = itemAccessKey;
link.Page = Page;
if (writer is Html32TextWriter) {
link.RenderBeginTag(writer);
SpanPanel lbl = new SpanPanel();
lbl.Page = Page;
RenderStyle(writer, lbl, linkClass, mergedStyle, applyInlineBorder);
lbl.RenderBeginTag(writer);
item.RenderText(writer);
lbl.RenderEndTag(writer);
link.RenderEndTag(writer);
}
else {
RenderStyle(writer, link, linkClass, mergedStyle, applyInlineBorder);
link.RenderBeginTag(writer);
item.RenderText(writer);
link.RenderEndTag(writer);
}
}
}
// Otherwise, write out a postback that will open or select the item
else {
if (PageAdapter != null) {
PageAdapter.RenderPostBackEvent(writer,
owner.UniqueID,
(clickOpensThisNode ? 'o' : 'b') +
Escape(item.InternalValuePath),
SR.GetString(SR.Adapter_OKLabel),
item.FormattedText,
null,
itemAccessKey != null ?
itemAccessKey :
(_currentAccessKey < 10 ?
(_currentAccessKey++).ToString(CultureInfo.InvariantCulture) :
null));
// Expand image
if (clickOpensThisNode) {
RenderExpand(writer, item, owner);
}
}
else {
HyperLink link = new HyperLink();
link.NavigateUrl = Page.ClientScript.GetPostBackClientHyperlink(owner,
(clickOpensThisNode ? 'o' : 'b') + Escape(item.InternalValuePath), true);
link.AccessKey = itemAccessKey;
link.Page = Page;
if (writer is Html32TextWriter) {
link.RenderBeginTag(writer);
SpanPanel lbl = new SpanPanel();
lbl.Page = Page;
RenderStyle(writer, lbl, linkClass, mergedStyle, applyInlineBorder);
lbl.RenderBeginTag(writer);
item.RenderText(writer);
if (clickOpensThisNode) {
RenderExpand(writer, item, owner);
}
lbl.RenderEndTag(writer);
link.RenderEndTag(writer);
}
else {
RenderStyle(writer, link, linkClass, mergedStyle, applyInlineBorder);
link.RenderBeginTag(writer);
item.RenderText(writer);
if (clickOpensThisNode) {
RenderExpand(writer, item, owner);
}
link.RenderEndTag(writer);
}
}
}
}
else {
item.RenderText(writer);
}
itemPanel.RenderEndTag(writer);
// Bottom (or right) item spacing
RenderBreak(writer);
if ((mergedStyle != null) && !mergedStyle.ItemSpacing.IsEmpty) {
RenderSpace(writer, mergedStyle.ItemSpacing, owner.Orientation);
}
// Bottom separator
string bottomSeparatorUrl = null;
if (item.SeparatorImageUrl.Length != 0) {
bottomSeparatorUrl = item.SeparatorImageUrl;
}
else if ((depth < owner.StaticDisplayLevels) && (owner.StaticBottomSeparatorImageUrl.Length != 0)) {
bottomSeparatorUrl = owner.StaticBottomSeparatorImageUrl;
}
else if ((depth >= owner.StaticDisplayLevels) && (owner.DynamicBottomSeparatorImageUrl.Length != 0)) {
bottomSeparatorUrl = owner.DynamicBottomSeparatorImageUrl;
}
if (bottomSeparatorUrl != null) {
Image separatorImage = new Image();
separatorImage.ImageUrl = bottomSeparatorUrl;
separatorImage.GenerateEmptyAlternateText = true; // XHtml compliance
separatorImage.Page = Page;
separatorImage.RenderControl(writer);
RenderBreak(writer);
}
}
private void RenderSpace(HtmlTextWriter writer, Unit space, Orientation orientation) {
Image spacerImage = new Image();
spacerImage.ImageUrl = Control.SpacerImageUrl;
spacerImage.GenerateEmptyAlternateText = true; // XHtml compliance
spacerImage.Page = Page;
if (orientation == Orientation.Vertical) {
spacerImage.Height = space;
spacerImage.Width = Unit.Pixel(1);
spacerImage.RenderControl(writer);
writer.WriteBreak();
}
else {
spacerImage.Width = space;
spacerImage.Height = Unit.Pixel(1);
spacerImage.RenderControl(writer);
}
}
private void RenderStyle(HtmlTextWriter writer, WebControl control, string className, MenuItemStyle style, bool applyInlineBorder) {
if (!String.IsNullOrEmpty(className)) {
control.CssClass = className;
if (applyInlineBorder) {
// Add inline style to force the border to none to override any CssClass (VSWhidbey 336610)
writer.AddStyleAttribute(HtmlTextWriterStyle.BorderStyle, "none");
// And an inline font-size of 1em to avoid squaring relative font sizes by applying them twice
writer.AddStyleAttribute(HtmlTextWriterStyle.FontSize, "1em");
}
}
else if (style != null) {
control.ApplyStyle(style);
}
}
void IPostBackEventHandler.RaisePostBackEvent(string eventArgument) {
RaisePostBackEvent(eventArgument);
}
protected virtual void RaisePostBackEvent(string eventArgument) {
if (eventArgument.Length == 0) {
return;
}
// On postback, see what kind of event we received by checking the first character
char eventType = eventArgument[0];
switch (eventType) {
case 'o': {
// 'o' means that we're opening the secondary navigation for this node
// Get the path of the item specified in the eventArgument
// The replace is to correct a Netscape 4 bug
string newPath = UnEscape(HttpUtility.UrlDecode(eventArgument.Substring(1)));
// Check the number of separator characters in the argument (should not be more than the max depth)
int matches = 0;
for (int i = 0; i < newPath.Length; i++) {
if (newPath[i] == TreeView.InternalPathSeparator) {
if (++matches >= Control.MaximumDepth) {
throw new InvalidOperationException(SR.GetString(SR.Menu_InvalidDepth));
}
}
}
// Check this item does have subitem
// (otherwise, it should just be selected, not opened)
MenuItem item = Control.Items.FindItem(newPath.Split(TreeView.InternalPathSeparator), 0);
if (item != null) {
if (item.ChildItems.Count > 0) {
_path = newPath;
}
else {
Control.InternalRaisePostBackEvent(newPath);
}
}
break;
}
case 'u' :
// 'u' means go up a level
if (_path != null) {
// Find that item in the tree
MenuItem item = Control.Items.FindItem(_path.Split(TreeView.InternalPathSeparator), 0);
if (item != null) {
MenuItem parentItem = item.Parent;
if (parentItem != null && item.Depth + 1 > Control.StaticDisplayLevels) {
_path = parentItem.InternalValuePath;
}
else {
_path = null;
}
}
}
break;
case 'b' :
// 'b' means bubble for to the control to handle
// The replace is to correct a Netscape 4 bug
Control.InternalRaisePostBackEvent(
UnEscape(HttpUtility.UrlDecode(eventArgument.Substring(1))));
break;
}
}
internal void SetPath(string path) {
_path = path;
}
private class SpanPanel : Panel {
protected override HtmlTextWriterTag TagKey {
get {
return HtmlTextWriterTag.Span;
}
}
}
}
}
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