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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) 2004-2017 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 <sch_draw_panel.h>
#include <sch_edit_frame.h>
#include <general.h>
#include <list_operations.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_sheet.h>
#include <sch_bitmap.h>
#include <sch_view.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 picked item link member
* swapped data is data modified by editing, so not all values are swapped
*/
void SCH_EDIT_FRAME::SaveCopyInUndoList( SCH_ITEM* aItem,
UNDO_REDO_T aCommandType,
bool aAppend,
const wxPoint& aTransformPoint )
{
PICKED_ITEMS_LIST* commandToUndo = NULL;
/* Does not save a null item or a UR_WIRE_IMAGE command type. UR_WIRE_IMAGE commands
* are handled by the overloaded version of SaveCopyInUndoList that takes a reference
* to a PICKED_ITEMS_LIST.
*/
if( aItem == NULL || aCommandType == UR_WIRE_IMAGE )
return;
if( aAppend )
commandToUndo = GetScreen()->PopCommandFromUndoList();
if( !commandToUndo )
{
commandToUndo = new PICKED_ITEMS_LIST();
commandToUndo->m_TransformPoint = aTransformPoint;
}
ITEM_PICKER itemWrapper( aItem, aCommandType );
itemWrapper.SetFlags( aItem->GetFlags() );
switch( aCommandType )
{
case UR_CHANGED: /* Create a copy of item */
itemWrapper.SetLink( DuplicateStruct( aItem, true ) );
commandToUndo->PushItem( itemWrapper );
break;
case UR_NEW:
case UR_DELETED:
case UR_ROTATED:
case UR_MOVED:
commandToUndo->PushItem( itemWrapper );
break;
default:
wxFAIL_MSG( wxString::Format( wxT( "SaveCopyInUndoList() error (unknown code %X)" ),
aCommandType ) );
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( const PICKED_ITEMS_LIST& aItemsList,
UNDO_REDO_T aTypeCommand,
bool aAppend,
const wxPoint& aTransformPoint )
{
PICKED_ITEMS_LIST* commandToUndo = NULL;
if( !aItemsList.GetCount() )
return;
// Can't append a WIRE IMAGE, so fail to a new undo point
if( aAppend && ( aTypeCommand != UR_WIRE_IMAGE ) )
{
commandToUndo = GetScreen()->PopCommandFromUndoList();
if( commandToUndo && commandToUndo->m_Status == UR_WIRE_IMAGE )
{
GetScreen()->PushCommandToUndoList( commandToUndo );
commandToUndo = NULL;
}
}
if( !commandToUndo )
{
commandToUndo = new PICKED_ITEMS_LIST();
commandToUndo->m_TransformPoint = aTransformPoint;
commandToUndo->m_Status = aTypeCommand;
}
// Copy picker list:
if( !commandToUndo->GetCount() )
commandToUndo->CopyList( aItemsList );
else
{
// Unless we are appending, in which case, get the picker items
for( unsigned ii = 0; ii < aItemsList.GetCount(); ii++ )
commandToUndo->PushItem( aItemsList.GetItemWrapper( ii) );
}
// 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:
case UR_WIRE_IMAGE:
break;
default:
wxFAIL_MSG( wxString::Format( wxT( "Unknown undo/redo command %d" ), command ) );
break;
}
}
if( commandToUndo->GetCount() || aTypeCommand == UR_WIRE_IMAGE )
{
/* 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* next_item;
SCH_ITEM* alt_item;
// Exchange the current wires, buses, and junctions with the copy save by the last edit.
if( aList->m_Status == UR_WIRE_IMAGE )
{
PICKED_ITEMS_LIST oldItems;
oldItems.m_Status = UR_WIRE_IMAGE;
// Remove all of the wires, buses, and junctions from the current screen.
for( item = GetScreen()->GetDrawItems(); item; item = next_item )
{
next_item = item->Next();
if( item->Type() == SCH_JUNCTION_T || item->Type() == SCH_LINE_T )
{
GetScreen()->Remove( item );
GetCanvas()->GetView()->Remove( item );
oldItems.PushItem( ITEM_PICKER( item, UR_WIRE_IMAGE ) );
}
}
// Copy the saved wires, buses, and junctions to the current screen.
for( unsigned int i = 0; i < aList->GetCount(); i++ )
{
item = static_cast<SCH_ITEM*>( aList->GetPickedItem( i ) );
AddToScreen( item );
}
// Copy the previous wires, buses, and junctions to the picked item list for the
// redo operation.
*aList = oldItems;
return;
}
// Undo in the reverse order of list creation: (this can allow stacked changes like the
// same item can be changed and deleted in the same complex command).
for( int ii = aList->GetCount() - 1; ii >= 0; ii-- )
{
UNDO_REDO_T status = aList->GetPickedItemStatus((unsigned) ii );
item = (SCH_ITEM*) aList->GetPickedItem( (unsigned) ii );
alt_item = (SCH_ITEM*) aList->GetPickedItemLink( (unsigned) ii );
item->ClearFlags();
if( status == UR_NEW )
{
// new items are deleted on undo
RemoveFromScreen( item );
aList->SetPickedItemStatus( UR_DELETED, (unsigned) ii );
}
else if (status == UR_DELETED )
{
// deleted items are re-inserted on undo
AddToScreen( item );
aList->SetPickedItemStatus( UR_NEW, (unsigned) ii );
}
else
{
// everthing else is modified in place
RemoveFromScreen( item );
switch( status )
{
case UR_CHANGED:
item->SwapData( alt_item );
break;
case UR_MOVED:
item->SetFlags( aList->GetPickerFlags( (unsigned) ii ) );
item->Move( aRedoCommand ? aList->m_TransformPoint : -aList->m_TransformPoint );
item->ClearFlags();
break;
case UR_MIRRORED_Y:
item->MirrorY( aList->m_TransformPoint.x );
break;
case UR_MIRRORED_X:
item->MirrorX( aList->m_TransformPoint.y );
break;
case UR_ROTATED:
if( aRedoCommand )
item->Rotate( aList->m_TransformPoint );
else
{
// Rotate 270 deg to undo 90-deg rotate
item->Rotate( aList->m_TransformPoint );
item->Rotate( aList->m_TransformPoint );
item->Rotate( aList->m_TransformPoint );
}
break;
case UR_EXCHANGE_T:
alt_item->SetNext( NULL );
alt_item->SetBack( NULL );
aList->SetPickedItem( alt_item, (unsigned) ii );
aList->SetPickedItemLink( item, (unsigned) ii );
item = alt_item;
break;
default:
wxFAIL_MSG( wxString::Format( wxT( "Unknown undo/redo command %d" ),
aList->GetPickedItemStatus( (unsigned) ii ) ) );
break;
}
AddToScreen( item );
}
}
// Bitmaps are cached in Opengl: clear the cache, because
// the cache data can be invalid
GetCanvas()->GetGAL()->ClearCache();
GetCanvas()->GetView()->ClearHiddenFlags();
}
void SCH_EDIT_FRAME::GetSchematicFromUndoList( wxCommandEvent& event )
{
if( GetScreen()->GetUndoCommandCount() <= 0 || isBusy() )
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 );
SetSheetNumberAndCount();
TestDanglingEnds();
SyncView();
GetCanvas()->Refresh();
OnModify();
}
void SCH_EDIT_FRAME::GetSchematicFromRedoList( wxCommandEvent& event )
{
if( GetScreen()->GetRedoCommandCount() == 0 || isBusy() )
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 );
SetSheetNumberAndCount();
TestDanglingEnds();
SyncView();
GetCanvas()->Refresh();
OnModify();
}
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