Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / UIAutomationClient / System / Windows / Automation / TreeWalker.cs / 1305600 / TreeWalker.cs
//----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
//
// Description: TreeWalker class, allows client to walk custom views of
// UIAutomation tree.
//
// History:
// 02/05/2004 : BrendanM Created
//
//---------------------------------------------------------------------------
using System;
using System.Windows.Automation.Provider;
using MS.Internal.Automation;
namespace System.Windows.Automation
{
///
/// TreeWalker - used to walk over a view of the UIAutomation tree
///
#if (INTERNAL_COMPILE)
internal sealed class TreeWalker
#else
public sealed class TreeWalker
#endif
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
#region Constructors
///
/// Create a tree walker that can be used to walk a specified
/// view of the UIAutomation tree.
///
/// Condition defining the view - nodes that do not satisfy this condition are skipped over
public TreeWalker(Condition condition)
{
Misc.ValidateArgumentNonNull(condition, "condition");
_condition = condition;
}
#endregion Constructors
//------------------------------------------------------
//
// Public Constants / Readonly Fields
//
//-----------------------------------------------------
#region Public Constants and Readonly Fields
///
/// Predefined TreeWalker for walking the Raw view of the UIAutomation tree
///
public static readonly TreeWalker RawViewWalker = new TreeWalker(Automation.RawViewCondition);
///
/// Predefined TreeWalker for walking the Control view of the UIAutomation tree
///
public static readonly TreeWalker ControlViewWalker = new TreeWalker(Automation.ControlViewCondition);
///
/// Predefined TreeWalker for walking the Content view of the UIAutomation tree
///
public static readonly TreeWalker ContentViewWalker = new TreeWalker(Automation.ContentViewCondition);
#endregion Public Constants and Readonly Fields
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
///
/// Get the parent of the specified element, in the current view
///
/// element to get the parent of
/// The parent of the specified element; can be null if
/// specified element was the root element
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetParent(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.Parent, _condition, null);
}
///
/// Get the first child of the specified element, in the current view
///
/// element to get the first child of
/// The frst child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetFirstChild(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.FirstChild, _condition, null);
}
///
/// Get the last child of the specified element, in the current view
///
/// element to get the last child of
/// The last child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetLastChild(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.LastChild, _condition, null);
}
///
/// Get the next sibling of the specified element, in the current view
///
/// element to get the next sibling of
/// The next sibling of the specified element - or null if the
/// specified element has no next sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetNextSibling(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.NextSibling, _condition, null);
}
///
/// Get the previous sibling of the specified element, in the current view
///
/// element to get the previous sibling of
/// The previous sibling of the specified element - or null if the
/// specified element has no previous sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetPreviousSibling(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.PreviousSibling, _condition, null);
}
///
/// Return the element or the nearest ancestor which is present in
/// the view of the tree used by this treewalker
///
/// element to normalize
/// The element or the nearest ancestor which satisfies the
/// condition used by this TreeWalker
///
/// This method starts at the specified element and walks up the
/// tree until it finds an element that satisfies the TreeWalker's
/// condition.
///
/// If the passed-in element itself satsifies the condition, it is
/// returned as-is.
///
/// If the process of walking up the tree hits the root node, then
/// the root node is returned, regardless of whether it satisfies
/// the condition or not.
///
public AutomationElement Normalize(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Normalize(_condition, null);
}
///
/// Get the parent of the specified element, in the current view,
/// prefetching properties
///
/// element to get the parent of
/// CacheRequest specifying information to be prefetched
/// The parent of the specified element; can be null if
/// specified element was the root element
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetParent(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.Parent, _condition, request);
}
///
/// Get the first child of the specified element, in the current view,
/// prefetching properties
///
/// element to get the first child of
/// CacheRequest specifying information to be prefetched
/// The frst child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetFirstChild(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.FirstChild, _condition, request);
}
///
/// Get the last child of the specified element, in the current view,
/// prefetching properties
///
/// element to get the last child of
/// CacheRequest specifying information to be prefetched
/// The last child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetLastChild(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.LastChild, _condition, request);
}
///
/// Get the next sibling of the specified element, in the current view,
/// prefetching properties
///
/// element to get the next sibling of
/// CacheRequest specifying information to be prefetched
/// The next sibling of the specified element - or null if the
/// specified element has no next sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetNextSibling(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.NextSibling, _condition, request);
}
///
/// Get the previous sibling of the specified element, in the current view,
/// prefetching properties
///
/// element to get the previous sibling of
/// CacheRequest specifying information to be prefetched
/// The previous sibling of the specified element - or null if the
/// specified element has no previous sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetPreviousSibling(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.PreviousSibling, _condition, request);
}
///
/// Return the element or the nearest ancestor which is present in
/// the view of the tree used by this treewalker, prefetching properties
/// for the returned node
///
/// element to normalize
/// CacheRequest specifying information to be prefetched
/// The element or the nearest ancestor which satisfies the
/// condition used by this TreeWalker
///
/// This method starts at the specified element and walks up the
/// tree until it finds an element that satisfies the TreeWalker's
/// condition.
///
/// If the passed-in element itself satsifies the condition, it is
/// returned as-is.
///
/// If the process of walking up the tree hits the root node, then
/// the root node is returned, regardless of whether it satisfies
/// the condition or not.
///
public AutomationElement Normalize(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Normalize(_condition, request);
}
#endregion Public Methods
//-----------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
///
/// Returns the condition used by this TreeWalker. The TreeWalker
/// skips over nodes that do not satisfy the condition.
///
public Condition Condition
{
get
{
return _condition;
}
}
#endregion Public Properties
//-----------------------------------------------------
//
// Private Fields
//
//-----------------------------------------------------
#region Private Fields
private Condition _condition;
#endregion Private Fields
}
}
// 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.
//
//
//
// Description: TreeWalker class, allows client to walk custom views of
// UIAutomation tree.
//
// History:
// 02/05/2004 : BrendanM Created
//
//---------------------------------------------------------------------------
using System;
using System.Windows.Automation.Provider;
using MS.Internal.Automation;
namespace System.Windows.Automation
{
///
/// TreeWalker - used to walk over a view of the UIAutomation tree
///
#if (INTERNAL_COMPILE)
internal sealed class TreeWalker
#else
public sealed class TreeWalker
#endif
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
#region Constructors
///
/// Create a tree walker that can be used to walk a specified
/// view of the UIAutomation tree.
///
/// Condition defining the view - nodes that do not satisfy this condition are skipped over
public TreeWalker(Condition condition)
{
Misc.ValidateArgumentNonNull(condition, "condition");
_condition = condition;
}
#endregion Constructors
//------------------------------------------------------
//
// Public Constants / Readonly Fields
//
//-----------------------------------------------------
#region Public Constants and Readonly Fields
///
/// Predefined TreeWalker for walking the Raw view of the UIAutomation tree
///
public static readonly TreeWalker RawViewWalker = new TreeWalker(Automation.RawViewCondition);
///
/// Predefined TreeWalker for walking the Control view of the UIAutomation tree
///
public static readonly TreeWalker ControlViewWalker = new TreeWalker(Automation.ControlViewCondition);
///
/// Predefined TreeWalker for walking the Content view of the UIAutomation tree
///
public static readonly TreeWalker ContentViewWalker = new TreeWalker(Automation.ContentViewCondition);
#endregion Public Constants and Readonly Fields
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
///
/// Get the parent of the specified element, in the current view
///
/// element to get the parent of
/// The parent of the specified element; can be null if
/// specified element was the root element
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetParent(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.Parent, _condition, null);
}
///
/// Get the first child of the specified element, in the current view
///
/// element to get the first child of
/// The frst child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetFirstChild(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.FirstChild, _condition, null);
}
///
/// Get the last child of the specified element, in the current view
///
/// element to get the last child of
/// The last child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetLastChild(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.LastChild, _condition, null);
}
///
/// Get the next sibling of the specified element, in the current view
///
/// element to get the next sibling of
/// The next sibling of the specified element - or null if the
/// specified element has no next sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetNextSibling(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.NextSibling, _condition, null);
}
///
/// Get the previous sibling of the specified element, in the current view
///
/// element to get the previous sibling of
/// The previous sibling of the specified element - or null if the
/// specified element has no previous sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetPreviousSibling(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Navigate(NavigateDirection.PreviousSibling, _condition, null);
}
///
/// Return the element or the nearest ancestor which is present in
/// the view of the tree used by this treewalker
///
/// element to normalize
/// The element or the nearest ancestor which satisfies the
/// condition used by this TreeWalker
///
/// This method starts at the specified element and walks up the
/// tree until it finds an element that satisfies the TreeWalker's
/// condition.
///
/// If the passed-in element itself satsifies the condition, it is
/// returned as-is.
///
/// If the process of walking up the tree hits the root node, then
/// the root node is returned, regardless of whether it satisfies
/// the condition or not.
///
public AutomationElement Normalize(AutomationElement element)
{
Misc.ValidateArgumentNonNull(element, "element");
return element.Normalize(_condition, null);
}
///
/// Get the parent of the specified element, in the current view,
/// prefetching properties
///
/// element to get the parent of
/// CacheRequest specifying information to be prefetched
/// The parent of the specified element; can be null if
/// specified element was the root element
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetParent(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.Parent, _condition, request);
}
///
/// Get the first child of the specified element, in the current view,
/// prefetching properties
///
/// element to get the first child of
/// CacheRequest specifying information to be prefetched
/// The frst child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetFirstChild(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.FirstChild, _condition, request);
}
///
/// Get the last child of the specified element, in the current view,
/// prefetching properties
///
/// element to get the last child of
/// CacheRequest specifying information to be prefetched
/// The last child of the specified element - or null if
/// the specified element has no children
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetLastChild(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.LastChild, _condition, request);
}
///
/// Get the next sibling of the specified element, in the current view,
/// prefetching properties
///
/// element to get the next sibling of
/// CacheRequest specifying information to be prefetched
/// The next sibling of the specified element - or null if the
/// specified element has no next sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetNextSibling(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.NextSibling, _condition, request);
}
///
/// Get the previous sibling of the specified element, in the current view,
/// prefetching properties
///
/// element to get the previous sibling of
/// CacheRequest specifying information to be prefetched
/// The previous sibling of the specified element - or null if the
/// specified element has no previous sibling
/// The view used is determined by the condition passed to
/// the constructor - elements that do not satisfy that condition
/// are skipped over
public AutomationElement GetPreviousSibling(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Navigate(NavigateDirection.PreviousSibling, _condition, request);
}
///
/// Return the element or the nearest ancestor which is present in
/// the view of the tree used by this treewalker, prefetching properties
/// for the returned node
///
/// element to normalize
/// CacheRequest specifying information to be prefetched
/// The element or the nearest ancestor which satisfies the
/// condition used by this TreeWalker
///
/// This method starts at the specified element and walks up the
/// tree until it finds an element that satisfies the TreeWalker's
/// condition.
///
/// If the passed-in element itself satsifies the condition, it is
/// returned as-is.
///
/// If the process of walking up the tree hits the root node, then
/// the root node is returned, regardless of whether it satisfies
/// the condition or not.
///
public AutomationElement Normalize(AutomationElement element, CacheRequest request)
{
Misc.ValidateArgumentNonNull(element, "element");
Misc.ValidateArgumentNonNull(request, "request");
return element.Normalize(_condition, request);
}
#endregion Public Methods
//-----------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
///
/// Returns the condition used by this TreeWalker. The TreeWalker
/// skips over nodes that do not satisfy the condition.
///
public Condition Condition
{
get
{
return _condition;
}
}
#endregion Public Properties
//-----------------------------------------------------
//
// Private Fields
//
//-----------------------------------------------------
#region Private Fields
private Condition _condition;
#endregion Private Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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