// Purpose: wxWindowID class - a class for managing window ids
// Author: Brian Vanderburg II
// Created: 2007-09-21
-// RCS-ID: $Id$
// Copyright: (c) 2007 Brian Vanderburg II
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#include "wx/intl.h"
#endif //WX_PRECOMP
+#include "wx/hashmap.h"
+
// Not needed, included in defs.h
// #include "wx/windowid.h"
-#define wxTRACE_WINDOWID _T("windowid")
+#define wxTRACE_WINDOWID wxT("windowid")
namespace
{
// meanwhile
static const wxUint8 ID_FREE = 0;
static const wxUint8 ID_STARTCOUNT = 1;
-static const wxUint8 ID_MAXCOUNT = 254;
+static const wxUint8 ID_COUNTTOOLARGE = 254;
static const wxUint8 ID_RESERVED = 255;
+// we use a two level count, most IDs will be used less than ID_COUNTTOOLARGE-1
+// thus we store their count directly in this array, however when the same ID
+// is reused a great number of times (more than or equal to ID_COUNTTOOLARGE),
+// the hash map stores the actual count
wxUint8 gs_autoIdsRefCount[wxID_AUTO_HIGHEST - wxID_AUTO_LOWEST + 1] = { 0 };
+// NB: this variable is allocated (again) only when an ID gets at least
+// ID_COUNTTOOLARGE refs, and is freed when the latest entry in the map gets
+// freed. The cell storing the count for an ID is freed only when its count
+// gets to zero (not when it goes below ID_COUNTTOOLARGE, so as to avoid
+// degenerate cases)
+wxLongToLongHashMap *gs_autoIdsLargeRefCount = NULL;
+
// this is an optimization used until we wrap around wxID_AUTO_HIGHEST: if this
// value is < wxID_AUTO_HIGHEST we know that we haven't wrapped yet and so can
// allocate the ids simply by incrementing it
wxWindowID gs_nextAutoId = wxID_AUTO_LOWEST;
// Reserve an ID
-void ReserveIdRefCount(wxWindowID id)
+void ReserveIdRefCount(wxWindowID winid)
{
- wxCHECK_RET(id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST,
+ wxCHECK_RET(winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST,
wxT("invalid id range"));
- id -= wxID_AUTO_LOWEST;
+ winid -= wxID_AUTO_LOWEST;
- wxCHECK_RET(gs_autoIdsRefCount[id] == ID_FREE,
+ wxCHECK_RET(gs_autoIdsRefCount[winid] == ID_FREE,
wxT("id already in use or already reserved"));
- gs_autoIdsRefCount[id] = ID_RESERVED;
+ gs_autoIdsRefCount[winid] = ID_RESERVED;
}
// Unreserve and id
-void UnreserveIdRefCount(wxWindowID id)
+void UnreserveIdRefCount(wxWindowID winid)
{
- wxCHECK_RET(id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST,
+ wxCHECK_RET(winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST,
wxT("invalid id range"));
- id -= wxID_AUTO_LOWEST;
+ winid -= wxID_AUTO_LOWEST;
- wxCHECK_RET(gs_autoIdsRefCount[id] == ID_RESERVED,
+ wxCHECK_RET(gs_autoIdsRefCount[winid] == ID_RESERVED,
wxT("id already in use or not reserved"));
- gs_autoIdsRefCount[id] = ID_FREE;
+ gs_autoIdsRefCount[winid] = ID_FREE;
}
// Get the usage count of an id
-int GetIdRefCount(wxWindowID id)
+int GetIdRefCount(wxWindowID winid)
{
- wxCHECK_MSG(id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST, 0,
+ wxCHECK_MSG(winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST, 0,
wxT("invalid id range"));
- id -= wxID_AUTO_LOWEST;
- return gs_autoIdsRefCount[id];
+ winid -= wxID_AUTO_LOWEST;
+ int refCount = gs_autoIdsRefCount[winid];
+ if (refCount == ID_COUNTTOOLARGE)
+ refCount = (*gs_autoIdsLargeRefCount)[winid];
+ return refCount;
}
// Increase the count for an id
-void IncIdRefCount(wxWindowID id)
+void IncIdRefCount(wxWindowID winid)
{
- wxCHECK_RET(id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST,
+ wxCHECK_RET(winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST,
wxT("invalid id range"));
- id -= wxID_AUTO_LOWEST;
+ winid -= wxID_AUTO_LOWEST;
- wxCHECK_RET(gs_autoIdsRefCount[id] != ID_MAXCOUNT, wxT("id count at max"));
- wxCHECK_RET(gs_autoIdsRefCount[id] != ID_FREE, wxT("id should first be reserved"));
+ wxCHECK_RET(gs_autoIdsRefCount[winid] != ID_FREE, wxT("id should first be reserved"));
+
+ if(gs_autoIdsRefCount[winid] == ID_RESERVED)
+ {
+ gs_autoIdsRefCount[winid] = ID_STARTCOUNT;
+ }
+ else if (gs_autoIdsRefCount[winid] >= ID_COUNTTOOLARGE-1)
+ {
+ if (gs_autoIdsRefCount[winid] == ID_COUNTTOOLARGE-1)
+ {
+ // we need to allocate a cell, and maybe the hash map itself
+ if (!gs_autoIdsLargeRefCount)
+ gs_autoIdsLargeRefCount = new wxLongToLongHashMap;
+ (*gs_autoIdsLargeRefCount)[winid] = ID_COUNTTOOLARGE-1;
- if(gs_autoIdsRefCount[id] == ID_RESERVED)
- gs_autoIdsRefCount[id] = ID_STARTCOUNT;
+ gs_autoIdsRefCount[winid] = ID_COUNTTOOLARGE;
+ }
+ ++(*gs_autoIdsLargeRefCount)[winid];
+ }
else
- gs_autoIdsRefCount[id]++;
+ {
+ gs_autoIdsRefCount[winid]++;
+ }
wxLogTrace(wxTRACE_WINDOWID, wxT("Increasing ref count of ID %d to %d"),
- id + wxID_AUTO_LOWEST, gs_autoIdsRefCount[id]);
+ winid + wxID_AUTO_LOWEST, GetIdRefCount(winid + wxID_AUTO_LOWEST));
}
// Decrease the count for an id
-void DecIdRefCount(wxWindowID id)
+void DecIdRefCount(wxWindowID winid)
{
- wxCHECK_RET(id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST,
+ wxCHECK_RET(winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST,
wxT("invalid id range"));
- id -= wxID_AUTO_LOWEST;
+ winid -= wxID_AUTO_LOWEST;
- wxCHECK_RET(gs_autoIdsRefCount[id] != ID_FREE, wxT("id count already 0"));
+ wxCHECK_RET(gs_autoIdsRefCount[winid] != ID_FREE, wxT("id count already 0"));
// DecIdRefCount is only called on an ID that has been IncIdRefCount'ed'
// so it should never be reserved, but test anyway
- if(gs_autoIdsRefCount[id] == ID_RESERVED)
+ if(gs_autoIdsRefCount[winid] == ID_RESERVED)
{
wxFAIL_MSG(wxT("reserve id being decreased"));
- gs_autoIdsRefCount[id] = ID_FREE;
+ gs_autoIdsRefCount[winid] = ID_FREE;
+ }
+ else if(gs_autoIdsRefCount[winid] == ID_COUNTTOOLARGE)
+ {
+ long &largeCount = (*gs_autoIdsLargeRefCount)[winid];
+ --largeCount;
+ if (largeCount == 0)
+ {
+ gs_autoIdsLargeRefCount->erase (winid);
+ gs_autoIdsRefCount[winid] = ID_FREE;
+
+ if (gs_autoIdsLargeRefCount->empty())
+ wxDELETE (gs_autoIdsLargeRefCount);
+ }
}
else
- gs_autoIdsRefCount[id]--;
+ gs_autoIdsRefCount[winid]--;
wxLogTrace(wxTRACE_WINDOWID, wxT("Decreasing ref count of ID %d to %d"),
- id + wxID_AUTO_LOWEST, gs_autoIdsRefCount[id]);
+ winid + wxID_AUTO_LOWEST, GetIdRefCount(winid + wxID_AUTO_LOWEST));
}
#else // wxUSE_AUTOID_MANAGEMENT
#if wxUSE_AUTOID_MANAGEMENT
-void wxWindowIDRef::Assign(wxWindowID id)
+void wxWindowIDRef::Assign(wxWindowID winid)
{
- if ( id != m_id )
+ if ( winid != m_id )
{
// decrease count if it is in the managed range
if ( m_id >= wxID_AUTO_LOWEST && m_id <= wxID_AUTO_HIGHEST )
DecIdRefCount(m_id);
- m_id = id;
+ m_id = winid;
// increase count if it is in the managed range
if ( m_id >= wxID_AUTO_LOWEST && m_id <= wxID_AUTO_HIGHEST )
#if wxUSE_AUTOID_MANAGEMENT
if ( gs_nextAutoId + count - 1 <= wxID_AUTO_HIGHEST )
{
- wxWindowID id = gs_nextAutoId;
+ wxWindowID winid = gs_nextAutoId;
while(count--)
{
ReserveIdRefCount(gs_nextAutoId++);
}
- return id;
+ return winid;
}
else
{
int found = 0;
- for(wxWindowID id = wxID_AUTO_LOWEST; id <= wxID_AUTO_HIGHEST; id++)
+ for(wxWindowID winid = wxID_AUTO_LOWEST; winid <= wxID_AUTO_HIGHEST; winid++)
{
- if(GetIdRefCount(id) == 0)
+ if(GetIdRefCount(winid) == 0)
{
found++;
if(found == count)
// called, and accorind to gs_nextAutoId, their are still
// 50 at the end so it returns them without testing the ref
// To fix this, the next ID is also updated here as needed
- if(id >= gs_nextAutoId)
- gs_nextAutoId = id + 1;
+ if(winid >= gs_nextAutoId)
+ gs_nextAutoId = winid + 1;
while(count--)
- ReserveIdRefCount(id--);
+ ReserveIdRefCount(winid--);
- return id + 1;
+ return winid + 1;
}
}
else
}
}
- ::wxLogError(_("Out of window IDs. Recommend shutting down application."));
+ wxLogError(_("Out of window IDs. Recommend shutting down application."));
return wxID_NONE;
#else // !wxUSE_AUTOID_MANAGEMENT
// Make sure enough in the range
- wxWindowID id;
+ wxWindowID winid;
- id = gs_nextAutoId - count + 1;
+ winid = gs_nextAutoId - count + 1;
- if ( id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST )
+ if ( winid >= wxID_AUTO_LOWEST && winid <= wxID_AUTO_HIGHEST )
{
// There is enough, but it may be time to wrap
- if(id == wxID_AUTO_LOWEST)
+ if(winid == wxID_AUTO_LOWEST)
gs_nextAutoId = wxID_AUTO_HIGHEST;
else
- gs_nextAutoId = id - 1;
+ gs_nextAutoId = winid - 1;
- return id;
+ return winid;
}
else
{
#endif // wxUSE_AUTOID_MANAGEMENT/!wxUSE_AUTOID_MANAGEMENT
}
-void wxIdManager::UnreserveId(wxWindowID id, int count)
+void wxIdManager::UnreserveId(wxWindowID winid, int count)
{
wxASSERT_MSG(count > 0, wxT("can't unreserve less than 1 id"));
#if wxUSE_AUTOID_MANAGEMENT
while (count--)
- UnreserveIdRefCount(id++);
+ UnreserveIdRefCount(winid++);
#else
- wxUnusedVar(id);
+ wxUnusedVar(winid);
wxUnusedVar(count);
#endif
}
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