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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// Description: Windows Status Proxy
using System;
using System.Collections;
using System.Text;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.ComponentModel;
using System.Windows;
using System.Globalization;
using MS.Win32;
namespace MS.Internal.AutomationProxies
{
class WindowsStatusBar : ProxyHwnd, IGridProvider, IRawElementProviderHwndOverride
{
// ------------------------------------------------------
//
// Constructors
//
// ------------------------------------------------------
#region Constructors
internal WindowsStatusBar(IntPtr hwnd, ProxyFragment parent, int item, Accessible acc)
: base(hwnd, parent, item)
{
_acc = acc;
_cControlType = ControlType.StatusBar;
_fHasGrip = StatusBarGrip.HasGrip(hwnd);
_sAutomationId = "StatusBar"; // This string is a non-localizable string
// support for events
_createOnEvent = new WinEventTracker.ProxyRaiseEvents (RaiseEvents);
}
#endregion
#region Proxy Create
// Static Create method called by UIAutomation to create this proxy.
// returns null if unsuccessful
internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild, int idObject)
{
return Create(hwnd, idChild);
}
private static IRawElementProviderSimple Create(IntPtr hwnd, int idChild)
{
// Something is wrong if idChild is not zero
ArgumentOutOfRangeException.ThrowIfNotEqual(idChild, 0);
return new WindowsStatusBar(hwnd, null, idChild, null);
}
// Static Create method called by the event tracker system
internal static void RaiseEvents (IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
if (idObject != NativeMethods.OBJID_VSCROLL && idObject != NativeMethods.OBJID_HSCROLL)
{
bool isWinforms = WindowsFormsHelper.IsWindowsFormsControl(hwnd);
ProxySimple el = isWinforms ? (ProxySimple)WindowsFormsHelper.Create(hwnd, 0, idObject) : (ProxySimple)Create(hwnd, 0);
if (el == null)
{
// WindowsFormsHelper may return null if the MSAA Role for this hwnd isn't handled
return;
}
if (idChild > 0)
{
if (eventId == NativeMethods.EventObjectNameChange && idChild == 1)
{
// Need to let the overall control process this event also.
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
el = ((WindowsStatusBar)el).CreateStatusBarPane(idChild - 1);
}
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
internal ProxySimple CreateStatusBarPane (int index)
{
// Use the Accessible object if this is a Winforms control. Only Winforms StatusBars
// can have children.
Accessible accChild = null;
if (_acc != null)
{
// OLEACC's Win32 proxy does use a 1, 2, 3... scheme, but the Winforms
// controls in some cases supply their own children, using a different scheme.
// Using the "ByIndex" approach avoids having to know what the underlying
// object's idChild scheme is.
accChild = Accessible.GetFullAccessibleChildByIndex(_acc, index);
if (accChild != null && accChild.Role != AccessibleRole.PushButton)
{
// WinForms toolbars have full IAccessibles for their children, but
// return the overall hwnd; treat those same as regular items.
// We only want to special-case actual child hwnds for overriding.
IntPtr hwndChild = accChild.Window;
if (hwndChild == IntPtr.Zero || hwndChild == _hwnd)
{
hwndChild = GetChildHwnd(_hwnd, accChild.Location);
}
if(hwndChild != IntPtr.Zero && hwndChild != _hwnd)
{
// We have an actual child hwnd.
return new WindowsStatusBarPaneChildOverrideProxy(hwndChild, this, index);
}
}
}
return new WindowsStatusBarPane(_hwnd, this, index, accChild);
}
#endregion Proxy Create
// ------------------------------------------------------
//
// Patterns Implementation
//
// ------------------------------------------------------
#region ProxySimple Interface
// Returns a pattern interface if supported.
internal override object GetPatternProvider (AutomationPattern iid)
{
return iid == GridPattern.Pattern ? this : null;
}
//Gets the localized name
internal override string LocalizedName
{
get
{
return Misc.ProxyGetText(_hwnd);
}
}
#endregion ElementProvider
#region ProxyFragment Interface
// Returns the next sibling element in the raw hierarchy.
// Peripheral controls have always negative values.
// Returns null if no next child
internal override ProxySimple GetNextSibling (ProxySimple child)
{
int item = child._item;
int count = Count;
// Next for an item that does not exist in the list
if (item >= count)
{
throw new ElementNotAvailableException ();
}
// The grip is the last item. Exit when we see it.
if (item == GripItemID)
{
return null;
}
// Eventually add the Grip as the last element in the list
return item + 1 < count ? CreateStatusBarPane(item + 1) : (_fHasGrip ? StatusBarGrip.Create(_hwnd, this, -1) : null);
}
// Returns the previous sibling element in the raw hierarchy.
// Peripheral controls have always negative values.
// Returns null is no previous
internal override ProxySimple GetPreviousSibling (ProxySimple child)
{
int item = child._item;
int count = Count;
// Next for an item that does not exist in the list
if (item >= count)
{
throw new ElementNotAvailableException ();
}
// Grip is the last in the list but has a negative number
// Fake a new item number that is last in the list
if (item == GripItemID)
{
item = count;
}
return item > 0 && (item - 1) < Count ? CreateStatusBarPane (item - 1) : null;
}
// Returns the first child element in the raw hierarchy.
internal override ProxySimple GetFirstChild ()
{
// Grip is the last Element
return Count > 0 ? CreateStatusBarPane(0) : (_fHasGrip ? StatusBarGrip.Create(_hwnd, this, GripItemID) : null);
}
// Returns the last child element in the raw hierarchy.
internal override ProxySimple GetLastChild ()
{
// Grip is the last Element
if (_fHasGrip)
{
return StatusBarGrip.Create(_hwnd, this, GripItemID);
}
int count = Count;
return count > 0 ? CreateStatusBarPane (count - 1): null;
}
// Returns a Proxy element corresponding to the specified screen coordinates.
internal override ProxySimple ElementProviderFromPoint (int x, int y)
{
// Loop through all the panes
for (int item = 0, count = Count; item < count; item++)
{
NativeMethods.Win32Rect rc = new NativeMethods.Win32Rect (WindowsStatusBarPane.GetBoundingRectangle (_hwnd, item));
if (Misc.PtInRect(ref rc, x, y))
{
return CreateStatusBarPane(item);
}
}
// Try the Grip
if (_fHasGrip)
{
NativeMethods.Win32Rect rc = StatusBarGrip.GetBoundingRectangle (_hwnd);
if (Misc.PtInRect(ref rc, x, y))
{
ProxySimple grip = StatusBarGrip.Create(_hwnd, this, -1);
return (ProxySimple)(grip != null ? grip : this);
}
}
return this;
}
#endregion
#region Grid Pattern
// Obtain the AutomationElement at an zero based absolute position in the grid.
// Where 0,0 is top left
IRawElementProviderSimple IGridProvider.GetItem(int row, int column)
{
// NOTE: Status bar has only 1 row
if (row != 0)
{
throw new ArgumentOutOfRangeException("row", row, SR.GridRowOutOfRange);
}
if (column < 0 || column >= Count)
{
throw new ArgumentOutOfRangeException("column", column, SR.GridColumnOutOfRange);
}
return CreateStatusBarPane(column);
}
int IGridProvider.RowCount
{
get
{
return 1;
}
}
int IGridProvider.ColumnCount
{
get
{
return Count;
}
}
#endregion Grid Pattern
#region IRawElementProviderHwndOverride Interface
//------------------------------------------------------
//
// Interface IRawElementProviderHwndOverride
//
//------------------------------------------------------
IRawElementProviderSimple IRawElementProviderHwndOverride.GetOverrideProviderForHwnd(IntPtr hwnd)
{
// return the appropriate placeholder for the given hwnd...
// loop over all the band to find it.
// Only Winforms StatusBars can have children.
if (_acc != null)
{
Accessible accChild = _acc.FirstChild;
IntPtr hwndChild = IntPtr.Zero;
for (int i = 0; accChild != null; i++, accChild = accChild.NextSibling(_acc))
{
hwndChild = accChild.Window;
if (hwndChild == IntPtr.Zero)
{
hwndChild = GetChildHwnd(_hwnd, accChild.Location);
}
if (hwndChild == hwnd)
{
return new WindowsStatusBarPaneChildOverrideProxy(hwnd, this, i);
}
}
}
return null;
}
#endregion IRawElementProviderHwndOverride Interface
// ------------------------------------------------------
//
// Private Methods
//
// ------------------------------------------------------
#region Private Methods
// Returns the number of Status Bar Panes
private int Count
{
get
{
if (_acc == null)
{
return Misc.ProxySendMessageInt(_hwnd, NativeMethods.SB_GETPARTS, IntPtr.Zero, IntPtr.Zero);
}
else
{
return _acc.ChildCount;
}
}
}
unsafe static private IntPtr GetChildHwnd(IntPtr hwnd, Rect rc)
{
UnsafeNativeMethods.ENUMCHILDWINDOWFROMRECT info = new UnsafeNativeMethods.ENUMCHILDWINDOWFROMRECT();
info.hwnd = IntPtr.Zero;
info.rc.left = (int)rc.Left;
info.rc.top = (int)rc.Top;
info.rc.right = (int)rc.Right;
info.rc.bottom = (int)rc.Bottom;
Misc.EnumChildWindows(hwnd, new NativeMethods.EnumChildrenCallbackVoid(FindChildFromRect), (void*)&info);
return info.hwnd;
}
unsafe static private bool FindChildFromRect(IntPtr hwnd, void* lParam)
{
NativeMethods.Win32Rect rc = NativeMethods.Win32Rect.Empty;
if (!Misc.GetClientRectInScreenCoordinates(hwnd, ref rc))
{
return true;
}
UnsafeNativeMethods.ENUMCHILDWINDOWFROMRECT * info = (UnsafeNativeMethods.ENUMCHILDWINDOWFROMRECT *)lParam;
if (rc.left == info->rc.left && rc.top == info->rc.top && rc.right == info->rc.right && rc.bottom == info->rc.bottom)
{
info->hwnd = hwnd;
return false;
}
return true;
}
#endregion
// ------------------------------------------------------
//
// Private Fields
//
// ------------------------------------------------------
#region Private Fields
// Status bar with a Grip Style
private bool _fHasGrip;
private Accessible _acc; // Accessible is used for WinForms controls.
// Item ID for the grip. Must be negative as it is a peripheral element
private const int GripItemID = -1;
private const int SBARS_SIZEGRIP = 0x0100;
#endregion
// ------------------------------------------------------
//
// WindowsStatusBarPane Private Class
//
// ------------------------------------------------------
#region WindowsStatusBarPane
class WindowsStatusBarPane : ProxySimple, IGridItemProvider, IValueProvider
{
// ------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
internal WindowsStatusBarPane (IntPtr hwnd, ProxyFragment parent, int item, Accessible acc)
: base (hwnd, parent, item)
{
_acc = acc;
_cControlType = ControlType.Edit;
_sAutomationId = "StatusBar.Pane" + item.ToString(CultureInfo.CurrentCulture); // This string is a non-localizable string
}
#endregion
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
// Returns a pattern interface if supported.
internal override object GetPatternProvider (AutomationPattern iid)
{
if (iid == GridItemPattern.Pattern)
{
return this;
}
else if (iid == ValuePattern.Pattern)
{
return this;
}
return null;
}
// Gets the bounding rectangle for this element
internal override Rect BoundingRectangle
{
get
{
return GetBoundingRectangle (_hwnd, _item);
}
}
// Gets the localized name
internal override string LocalizedName
{
get
{
return Text;
}
}
#endregion ProxySimple Interface
#region Grid Pattern
int IGridItemProvider.Row
{
get
{
return 0;
}
}
int IGridItemProvider.Column
{
get
{
return _item;
}
}
int IGridItemProvider.RowSpan
{
get
{
return 1;
}
}
int IGridItemProvider.ColumnSpan
{
get
{
return 1;
}
}
IRawElementProviderSimple IGridItemProvider.ContainingGrid
{
get
{
return _parent;
}
}
#endregion Grid Pattern
#region Value Pattern
// Sets the text of the edit.
void IValueProvider.SetValue(string str)
{
// This is a read only element.
throw new InvalidOperationException(SR.OperationCannotBePerformed);
}
// Request to get the value that this UI element is representing as a string
string IValueProvider.Value
{
get
{
return Text;
}
}
// Read only status
bool IValueProvider.IsReadOnly
{
get
{
return true;
}
}
#endregion
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// Retrieves the bounding rectangle of the Status Bar Pane.
static internal Rect GetBoundingRectangle (IntPtr hwnd, int item)
{
if( !WindowsFormsHelper.IsWindowsFormsControl(hwnd))
{
return XSendMessage.GetItemRect(hwnd, NativeMethods.SB_GETRECT, item);
}
else
{
Accessible acc = null;
if (Accessible.AccessibleObjectFromWindow(hwnd, NativeMethods.OBJID_CLIENT, ref acc) != NativeMethods.S_OK || acc == null)
{
return Rect.Empty;
}
else
{
// OLEACC's Win32 proxy does use a 1, 2, 3... scheme, but the Winforms
// controls in some cases supply their own children, using a different scheme.
// Using the "ByIndex" approach avoids having to know what the underlying
// object's idChild scheme is.
acc = Accessible.GetFullAccessibleChildByIndex(acc, item);
if (acc == null)
{
return Rect.Empty;
}
else
{
return acc.Location;
}
}
}
}
//Gets the localized name
internal string Text
{
get
{
if (_acc == null)
{
// Get the length of the string
int retValue = Misc.ProxySendMessageInt(_hwnd, NativeMethods.SB_GETTEXTLENGTHW, new IntPtr(_item), IntPtr.Zero);
// The low word specifies the length, in characters, of the text.
// The high word specifies the type of operation used to draw the text.
int len = NativeMethods.Util.LOWORD(retValue);
return XSendMessage.GetItemText(_hwnd, NativeMethods.SB_GETTEXTW, _item, len);
}
else
{
return _acc.Name;
}
}
}
#endregion
// ------------------------------------------------------
//
// Private Fields
//
// ------------------------------------------------------
#region Private Fields
private Accessible _acc; // Accessible is used for WinForms controls.
#endregion
}
#endregion
// ------------------------------------------------------
//
// WindowsStatusBarPaneChildOverrideProxy Private Class
//
//------------------------------------------------------
#region WindowsStatusBarPaneChildOverrideProxy
class WindowsStatusBarPaneChildOverrideProxy : ProxyHwnd, IGridItemProvider
{
// ------------------------------------------------------
//
// Constructors
//
// ------------------------------------------------------
#region Constructors
internal WindowsStatusBarPaneChildOverrideProxy(IntPtr hwnd, ProxyFragment parent, int item)
: base(hwnd, parent, item)
{
}
#endregion
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
internal override ProviderOptions ProviderOptions
{
get
{
return base.ProviderOptions | ProviderOptions.OverrideProvider;
}
}
// Returns a pattern interface if supported.
internal override object GetPatternProvider(AutomationPattern iid)
{
if (iid == GridItemPattern.Pattern)
{
return this;
}
return null;
}
internal override object GetElementProperty(AutomationProperty idProp)
{
// No property should be handled by the override proxy
// Overrides the ProxySimple implementation.
return null;
}
#endregion
#region Grid Pattern
int IGridItemProvider.Row
{
get
{
return 0;
}
}
int IGridItemProvider.Column
{
get
{
return _item;
}
}
int IGridItemProvider.RowSpan
{
get
{
return 1;
}
}
int IGridItemProvider.ColumnSpan
{
get
{
return 1;
}
}
IRawElementProviderSimple IGridItemProvider.ContainingGrid
{
get
{
return _parent;
}
}
#endregion Grid Pattern
}
#endregion
// ------------------------------------------------------
//
// StatusBarGrip Private Class
//
// ------------------------------------------------------
#region StatusBarGrip
class StatusBarGrip: ProxyFragment
{
// ------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
public StatusBarGrip (IntPtr hwnd, ProxyHwnd parent, int item)
: base( hwnd, parent, item)
{
_sType = SR.LocalizedControlTypeGrip;
_sAutomationId = "StatusBar.Grip"; // This string is a non-localizable string
}
#endregion
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
// Gets the bounding rectangle for this element
internal override Rect BoundingRectangle
{
get
{
// Don't need to normalize, GetBoundingRectangle returns absolute coordinates.
return GetBoundingRectangle(_hwnd).ToRect(false);
}
}
#endregion
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// Gets the bounding rectangle for this element
internal static NativeMethods.Win32Rect GetBoundingRectangle (IntPtr hwnd)
{
if (!HasGrip(hwnd))
{
return NativeMethods.Win32Rect.Empty;
}
NativeMethods.Win32Rect client = new NativeMethods.Win32Rect();
if (!Misc.GetClientRectInScreenCoordinates(hwnd, ref client))
{
return NativeMethods.Win32Rect.Empty;
}
// Get the Size for the Gripper
// The size can change at any time so the value cannot be cached
NativeMethods.SIZE sizeGrip = WindowsGrip.GetGripSize(hwnd, true);
if (Misc.IsLayoutRTL(hwnd))
{
// Right to left mirroring style
return new NativeMethods.Win32Rect(client.left, client.bottom - sizeGrip.cy, client.left + sizeGrip.cx, client.bottom);
}
else
{
return new NativeMethods.Win32Rect(client.right - sizeGrip.cx, client.bottom - sizeGrip.cy, client.right, client.bottom);
}
}
internal static StatusBarGrip Create(IntPtr hwnd, ProxyHwnd parent, int item)
{
if(HasGrip(hwnd))
{
return new StatusBarGrip(hwnd, parent, item);
}
return null;
}
#endregion
#region Private Methods
internal static bool HasGrip(IntPtr hwnd)
{
int style = Misc.GetWindowStyle(hwnd);
return Misc.IsBitSet(style, SBARS_SIZEGRIP) || WindowsGrip.IsGripPresent(hwnd, true);
}
#endregion
}
#endregion
}
}
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