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kicad/eeschema/schematic_undo_redo.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2004 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
* Copyright (C) 2008-2011 Wayne Stambaugh <stambaughw@verizon.net>
* Copyright (C) 2004-2011 KiCad Developers, see change_log.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file schematic_undo_redo.cpp
* @brief Eeschema undo and redo functions for schematic editor.
*/
#include <fctsys.h>
#include <class_drawpanel.h>
#include <wxEeschemaStruct.h>
#include <general.h>
#include <protos.h>
#include <sch_bus_entry.h>
#include <sch_marker.h>
#include <sch_junction.h>
#include <sch_line.h>
#include <sch_no_connect.h>
#include <sch_component.h>
#include <sch_polyline.h>
#include <sch_sheet.h>
#include <sch_bitmap.h>
/* Functions to undo and redo edit commands.
* commands to undo are stored in CurrentScreen->m_UndoList
* commands to redo are stored in CurrentScreen->m_RedoList
*
* m_UndoList and m_RedoList handle a std::vector of PICKED_ITEMS_LIST
* Each PICKED_ITEMS_LIST handle a std::vector of pickers (class ITEM_PICKER),
* that store the list of schematic items that are concerned by the command to
* undo or redo and is created for each command to undo (handle also a command
* to redo). each picker has a pointer pointing to an item to undo or redo (in
* fact: deleted, added or modified), and has a pointer to a copy of this item,
* when this item has been modified (the old values of parameters are
* therefore saved)
*
* there are 3 cases:
* - delete item(s) command
* - change item(s) command
* - add item(s) command
* and 2 cases for block:
* - move list of items
* - mirror (Y) list of items
*
* Undo command
* - delete item(s) command:
* => deleted items are moved in undo list
*
* - change item(s) command
* => A copy of item(s) is made (a DrawPickedStruct list of wrappers)
* the .m_Link member of each wrapper points the modified item.
* the .m_Item member of each wrapper points the old copy of this item.
*
* - add item(s) command
* =>A list of item(s) is made. The .m_Item member of each wrapper points
* the new item.
*
* Redo command
* - delete item(s) old command:
* => deleted items are moved in GetDrawItems() list, and in
*
* - change item(s) command
* => the copy of item(s) is moved in Undo list
*
* - add item(s) command
* => The list of item(s) is used to create a deleted list in undo
* list(same as a delete command)
*
* Some block operations that change items can be undone without memorized
* items, just the coordinates of the transform: move list of items (undo/
* redo is made by moving with the opposite move vector) mirror (Y) and flip
* list of items (undo/redo is made by mirror or flip items) so they are
* handled specifically.
*
* A problem is the hierarchical sheet handling.
* the data associated (sub-hierarchy, undo/redo list) is deleted only
* when the sheet is really deleted (i.e. when deleted from undo or redo list)
* This is handled by its destructor.
*/
/* Used if undo / redo command:
* swap data between Item and its copy, pointed by its .m_Image member
* swapped data is data modified by edition, so not all values are swapped
*/
void SCH_EDIT_FRAME::SaveCopyInUndoList( SCH_ITEM* aItem,
UNDO_REDO_T aCommandType,
const wxPoint& aTransformPoint )
{
/* Does not save a null item.
* but if aCommandType == UR_WIRE_IMAGE, we must save null item.
* It happens for the first wire entered in schematic:
* To undo this first command, the previous state is a NULL item,
* and we accept this
*/
if( aItem == NULL && ( aCommandType != UR_WIRE_IMAGE ) )
return;
SCH_ITEM* CopyOfItem;
PICKED_ITEMS_LIST* commandToUndo = new PICKED_ITEMS_LIST();
commandToUndo->m_TransformPoint = aTransformPoint;
ITEM_PICKER itemWrapper( aItem, aCommandType );
if( aItem )
{
itemWrapper.m_PickedItemType = aItem->Type();
itemWrapper.m_PickerFlags = aItem->GetFlags();
}
switch( aCommandType )
{
case UR_CHANGED: /* Create a copy of item */
CopyOfItem = DuplicateStruct( aItem, true );
itemWrapper.m_Link = CopyOfItem;
if( CopyOfItem )
commandToUndo->PushItem( itemWrapper );
break;
case UR_NEW:
case UR_WIRE_IMAGE:
case UR_DELETED:
case UR_ROTATED:
case UR_MOVED:
commandToUndo->PushItem( itemWrapper );
break;
default:
{
wxString msg;
msg.Printf( wxT( "SaveCopyInUndoList() error (unknown code %X)" ),
aCommandType );
wxMessageBox( msg );
}
break;
}
if( commandToUndo->GetCount() )
{
/* Save the copy in undo list */
GetScreen()->PushCommandToUndoList( commandToUndo );
/* Clear redo list, because after new save there is no redo to do */
GetScreen()->ClearUndoORRedoList( GetScreen()->m_RedoList );
}
else
delete commandToUndo;
}
void SCH_EDIT_FRAME::SaveCopyInUndoList( PICKED_ITEMS_LIST& aItemsList,
UNDO_REDO_T aTypeCommand,
const wxPoint& aTransformPoint )
{
PICKED_ITEMS_LIST* commandToUndo = new PICKED_ITEMS_LIST();
commandToUndo->m_TransformPoint = aTransformPoint;
// Copy picker list:
commandToUndo->CopyList( aItemsList );
// Verify list, and creates data if needed
for( unsigned ii = 0; ii < commandToUndo->GetCount(); ii++ )
{
SCH_ITEM* item = (SCH_ITEM*) commandToUndo->GetPickedItem( ii );
wxASSERT( item );
UNDO_REDO_T command = commandToUndo->GetPickedItemStatus( ii );
if( command == UR_UNSPECIFIED )
{
command = aTypeCommand;
commandToUndo->SetPickedItemStatus( command, ii );
}
switch( command )
{
case UR_CHANGED: /* Create a copy of item */
/* If needed, create a copy of item, and put in undo list
* in the picker, as link
* If this link is not null, the copy is already done
*/
if( commandToUndo->GetPickedItemLink( ii ) == NULL )
commandToUndo->SetPickedItemLink( DuplicateStruct( item, true ), ii );
wxASSERT( commandToUndo->GetPickedItemLink( ii ) );
break;
case UR_MOVED:
case UR_MIRRORED_Y:
case UR_MIRRORED_X:
case UR_ROTATED:
case UR_NEW:
case UR_DELETED:
case UR_EXCHANGE_T:
break;
default:
wxFAIL_MSG( wxString::Format( wxT( "Unknown undo/redo command %d" ), command ) );
break;
}
}
if( commandToUndo->GetCount() )
{
/* Save the copy in undo list */
GetScreen()->PushCommandToUndoList( commandToUndo );
/* Clear redo list, because after new save there is no redo to do */
GetScreen()->ClearUndoORRedoList( GetScreen()->m_RedoList );
}
else // Should not occur
delete commandToUndo;
}
void SCH_EDIT_FRAME::PutDataInPreviousState( PICKED_ITEMS_LIST* aList, bool aRedoCommand )
{
SCH_ITEM* item;
SCH_ITEM* alt_item;
// Undo in the reverse order of list creation: (this can allow stacked
// changes like the same item can be changes and deleted in the same
// complex command
for( int ii = aList->GetCount() - 1; ii >= 0; ii-- )
{
item = (SCH_ITEM*) aList->GetPickedItem( ii );
if( item )
item->ClearFlags();
SCH_ITEM* image = (SCH_ITEM*) aList->GetPickedItemLink( ii );
switch( aList->GetPickedItemStatus( ii ) )
{
case UR_CHANGED: /* Exchange old and new data for each item */
item->SwapData( image );
break;
case UR_NEW: /* new items are deleted */
aList->SetPickedItemStatus( UR_DELETED, ii );
GetScreen()->RemoveFromDrawList( item );
break;
case UR_DELETED: /* deleted items are put in EEdrawList, as new items */
aList->SetPickedItemStatus( UR_NEW, ii );
item->SetNext( GetScreen()->GetDrawItems() );
GetScreen()->SetDrawItems( item );
break;
case UR_MOVED:
item->ClearFlags();
item->SetFlags( aList->GetPickerFlags( ii ) );
item->Move( aRedoCommand ? aList->m_TransformPoint : -aList->m_TransformPoint );
item->ClearFlags();
break;
case UR_MIRRORED_Y:
{
wxPoint mirrorPoint = aList->m_TransformPoint;
item->Mirror_Y( mirrorPoint.x );
}
break;
case UR_MIRRORED_X:
{
wxPoint mirrorPoint = aList->m_TransformPoint;
item->Mirror_X( mirrorPoint.y );
}
break;
case UR_ROTATED:
{
// To undo a rotate 90 deg transform we must rotate 270 deg to undo
// and 90 deg to redo:
wxPoint RotationPoint = aList->m_TransformPoint;
item->Rotate( RotationPoint );
if( aRedoCommand )
break; // A only one rotate transform is OK
// Make 3 rotate 90 deg transforms is this is actually an undo command
item->Rotate( RotationPoint );
item->Rotate( RotationPoint );
}
break;
case UR_WIRE_IMAGE:
/* Exchange the current wires and the old wires */
alt_item = GetScreen()->ExtractWires( false );
aList->SetPickedItem( alt_item, ii );
while( item )
{
SCH_ITEM* nextitem = item->Next();
item->SetNext( GetScreen()->GetDrawItems() );
GetScreen()->SetDrawItems( item );
item->ClearFlags();
item = nextitem;
}
break;
case UR_EXCHANGE_T:
alt_item = (SCH_ITEM*) aList->GetPickedItemLink( ii );
alt_item->SetNext( NULL );
alt_item->SetBack( NULL );
GetScreen()->RemoveFromDrawList( item );
GetScreen()->AddToDrawList( alt_item );
aList->SetPickedItem( alt_item, ii );
aList->SetPickedItemLink( item, ii );
break;
default:
wxFAIL_MSG( wxString::Format( wxT( "Unknown undo/redo command %d" ),
aList->GetPickedItemStatus( ii ) ) );
break;
}
}
}
void SCH_EDIT_FRAME::GetSchematicFromUndoList( wxCommandEvent& event )
{
if( GetScreen()->GetUndoCommandCount() <= 0 )
return;
/* Get the old list */
PICKED_ITEMS_LIST* List = GetScreen()->PopCommandFromUndoList();
/* Undo the command */
PutDataInPreviousState( List, false );
/* Put the old list in RedoList */
List->ReversePickersListOrder();
GetScreen()->PushCommandToRedoList( List );
OnModify();
SetSheetNumberAndCount();
GetScreen()->TestDanglingEnds();
m_canvas->Refresh();
}
void SCH_EDIT_FRAME::GetSchematicFromRedoList( wxCommandEvent& event )
{
if( GetScreen()->GetRedoCommandCount() == 0 )
return;
/* Get the old list */
PICKED_ITEMS_LIST* List = GetScreen()->PopCommandFromRedoList();
/* Redo the command: */
PutDataInPreviousState( List, true );
/* Put the old list in UndoList */
List->ReversePickersListOrder();
GetScreen()->PushCommandToUndoList( List );
OnModify();
SetSheetNumberAndCount();
GetScreen()->TestDanglingEnds();
m_canvas->Refresh();
}
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