HResult INiIsolationClient.PreProcessMessage(ref NiMessage message, out PreProcessMessageResult preProcessMessageResult)
{
preProcessMessageResult = 0;
try
{
var result = HResult.False;
var target = FindTarget(message.HWnd);
if (target != null)
{
Message msg = message;
result = target.PreProcessMessage(ref msg) ? HResult.OK : HResult.False;
message = msg;
if (ControlStubs.ControlGetState2(target, ControlStubs.STATE2_INPUTKEY))
preProcessMessageResult |= PreProcessMessageResult.IsInputKey;
if (ControlStubs.ControlGetState2(target, ControlStubs.STATE2_INPUTCHAR))
preProcessMessageResult |= PreProcessMessageResult.IsInputChar;
}
return result;
}
catch (Exception ex)
{
return ErrorUtil.GetHResult(ex);
}
}
HResult INiIsolationHost.ProcessCmdKey(ref NiMessage message, Keys keyData)
{
try
{
Message msg = message;
bool result = ProcessCmdKey(ref msg, keyData);
message = msg;
return result ? HResult.OK : HResult.False;
}
catch (Exception ex)
{
return ErrorUtil.GetHResult(ex);
}
}
public HResult BroadcastPreMessageFilter(ref NiMessage message)
{
try
{
if (_preMessageFilterRecursion > 0)
return HResult.False;
_preMessageFilterRecursion++;
try
{
// We delay resolve the package manager because it is created
// after NiShell is.
if (_packageManager == null)
_packageManager = (NiPackageManager)GetService(typeof(INiPackageManager));
if (MessageFilterUtil.InvokeMessageFilter(ref message))
return HResult.OK;
foreach (var package in _packageManager.Packages)
{
var preMessageFilter = package.Package as INiPreMessageFilter;
if (
preMessageFilter != null &&
ErrorUtil.ThrowOnFailure(preMessageFilter.PreFilterMessage(ref message))
)
return HResult.OK;
}
return HResult.False;
}
finally
{
_preMessageFilterRecursion--;
}
}
catch (Exception ex)
{
return ErrorUtil.GetHResult(ex);
}
}
public HResult PreProcessMessage(ref NiMessage message, out PreProcessMessageResult preProcessMessageResult)
{
preProcessMessageResult = 0;
try
{
if (_page != null)
return _page.PreProcessMessage(ref message, out preProcessMessageResult);
return HResult.False;
}
catch (Exception ex)
{
return ErrorUtil.GetHResult(ex);
}
}
public static bool InvokeMessageFilter(ref NiMessage message)
{
// This methods invokes System.Windows.Forms.Application+ThreadContext.ProcessFilters.
// The purpose of this is to broadcast pre-filter messages over
// AppDomains. The idea is that every AppDomain has a mesage filter.
// When this message filter receives a message, it is passed
// to INiShell.BroadcastPreFilterMessage. That method invokes
// this method on AppDomain 1 and passes it on to all INiPackages
// that implement INiPreMessageFilter. That implementation in turn
// also invokes this method so that the message is broadcasted to
// the rest of the AppDomains. Care must be taken to make sure that
// this does not recurse, so all calls to INiShell.BroadcastPreMessageFilter
// and MessageFilterUtil.InvokeMessageFilter must be protected with
// recursion prevention.
return _invokeMessageFilterDelegate(ref message);
}
public HResult PreFilterMessage(ref NiMessage message)
{
try
{
if (_preMessageFilterRecursion > 0)
return HResult.False;
_preMessageFilterRecursion++;
try
{
return MessageFilterUtil.InvokeMessageFilter(ref message)
? HResult.OK
: HResult.False;
}
finally
{
_preMessageFilterRecursion--;
}
}
catch (Exception ex)
{
return ErrorUtil.GetHResult(ex);
}
}
