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kicad/eeschema/schematic_undo_redo.cpp

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/************************************************************/
/* eeschema: undo and redo functions for schematic editor */
/************************************************************/
#include "fctsys.h"
#include "common.h"
#include "class_drawpanel.h"
#include "program.h"
#include "general.h"
#include "protos.h"
#include "class_marker_sch.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 EEDrawList 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 SwapData( EDA_BaseStruct* aItem, EDA_BaseStruct* aImage )
{
if( aItem == NULL || aImage == NULL )
{
wxMessageBox( wxT( "SwapData error: NULL pointer" ) );
return;
}
switch( aItem->Type() )
{
case DRAW_POLYLINE_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_POLYLINE*) aItem )
#define DEST ( (SCH_POLYLINE*) aImage )
break;
case DRAW_JUNCTION_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_JUNCTION*) aItem )
#define DEST ( (SCH_JUNCTION*) aImage )
EXCHG( SOURCE->m_Pos, DEST->m_Pos );
break;
case TYPE_SCH_LABEL:
case TYPE_SCH_GLOBALLABEL:
case TYPE_SCH_HIERLABEL:
case TYPE_SCH_TEXT:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_TEXT*) aItem )
#define DEST ( (SCH_TEXT*) aImage )
DEST->SwapData( SOURCE );
break;
case TYPE_SCH_COMPONENT:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_COMPONENT*) aItem )
#define DEST ( (SCH_COMPONENT*) aImage )
DEST->SwapData( SOURCE );
break;
case DRAW_SEGMENT_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_LINE*) aItem )
#define DEST ( (SCH_LINE*) aImage )
EXCHG( SOURCE->m_Start, DEST->m_Start );
EXCHG( SOURCE->m_End, DEST->m_End );
break;
case DRAW_BUSENTRY_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_BUS_ENTRY*) aItem )
#define DEST ( (SCH_BUS_ENTRY*) aImage )
EXCHG( SOURCE->m_Pos, DEST->m_Pos );
EXCHG( SOURCE->m_Size, DEST->m_Size );
break;
case DRAW_SHEET_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_SHEET*) aItem )
#define DEST ( (SCH_SHEET*) aImage )
DEST->SwapData( SOURCE );
break;
case TYPE_SCH_MARKER:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_MARKER*) aItem )
#define DEST ( (SCH_MARKER*) aImage )
EXCHG( SOURCE->m_Pos, DEST->m_Pos );
break;
case DRAW_HIERARCHICAL_PIN_SHEET_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_SHEET_PIN*) aItem )
#define DEST ( (SCH_SHEET_PIN*) aImage )
EXCHG( SOURCE->m_Edge, DEST->m_Edge );
EXCHG( SOURCE->m_Shape, DEST->m_Shape );
break;
case DRAW_NOCONNECT_STRUCT_TYPE:
#undef SOURCE
#undef DEST
#define SOURCE ( (SCH_NO_CONNECT*) aItem )
#define DEST ( (SCH_NO_CONNECT*) aImage )
EXCHG( SOURCE->m_Pos, DEST->m_Pos );
break;
case DRAW_PART_TEXT_STRUCT_TYPE:
break;
// not directly used in schematic:
default:
wxMessageBox(wxT( "SwapData() error: unexpected type" ) );
break;
}
}
/** function SaveCopyInUndoList
* Create a copy of the current schematic item, and put it in the undo list.
*
* flag_type_command =
* UR_CHANGED
* UR_NEW
* UR_DELETED
* UR_WIRE_IMAGE
* UR_MOVED
*
* If it is a delete command, items are put on list with the .Flags member
* set to UR_DELETED. When it will be really deleted, the EEDrawList and the
* sub-hierarchy will be deleted. If it is only a copy, the EEDrawList and the
* sub-hierarchy must NOT be deleted.
*
* Note:
* Edit wires and buses is a bit complex.
* because when a new wire is added, modifications in wire list
* (wire concatenation) there are modified items, deleted items and new items
* so flag_type_command is UR_WIRE_IMAGE: the struct ItemToCopy is a list of
* wires saved in Undo List (for Undo or Redo commands, saved wires will be
* exchanged with current wire list
*/
void WinEDA_SchematicFrame::SaveCopyInUndoList( SCH_ITEM* aItem,
UndoRedoOpType 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->m_Flags;
}
switch( aCommandType )
{
case UR_CHANGED: /* Create a copy of item */
CopyOfItem = DuplicateStruct( aItem );
itemWrapper.m_Link = CopyOfItem;
if ( CopyOfItem )
commandToUndo->PushItem( itemWrapper );
break;
case UR_NEW:
case UR_WIRE_IMAGE:
case UR_DELETED:
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;
}
/** function SaveCopyInUndoList
* @param aItemsList = a PICKED_ITEMS_LIST of items to save
* @param aTypeCommand = type of command ( UR_CHANGED, UR_NEW, UR_DELETED ...
*/
void WinEDA_SchematicFrame::SaveCopyInUndoList( PICKED_ITEMS_LIST& aItemsList,
UndoRedoOpType 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 );
UndoRedoOpType 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 ), ii );
wxASSERT( commandToUndo->GetPickedItemLink(ii) );
break;
case UR_MOVED:
case UR_MIRRORED_Y:
case UR_NEW:
case UR_DELETED:
break;
default:
{
wxString msg;
msg.Printf( wxT( "SaveCopyInUndoList() error (unknown code %X)" ),
command );
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 // Should not occur
delete commandToUndo;
}
/** Function PutDataInPreviousState()
* Used in undo or redo command.
* Put data pointed by List in the previous state, i.e. the state memorized
* by List
* @param aList = a PICKED_ITEMS_LIST pointer to the list of items to undo/redo
* @param aRedoCommand = a bool: true for redo, false for undo
*/
void WinEDA_SchematicFrame::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_PICKER itemWrapper = aList->GetItemWrapper( ii );
item = (SCH_ITEM*) itemWrapper.m_PickedItem;
if ( item )
item->m_Flags = 0;
SCH_ITEM* image = (SCH_ITEM*) itemWrapper.m_Link;
switch( itemWrapper.m_UndoRedoStatus )
{
case UR_CHANGED: /* Exchange old and new data for each item */
SwapData( item, 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()->EEDrawList );
GetScreen()->EEDrawList = item;
break;
case UR_MOVED:
item->m_Flags = aList->GetPickerFlags(ii);
item->Move( aRedoCommand ?
aList->m_TransformPoint : - aList->m_TransformPoint );
item->m_Flags = 0;
break;
case UR_MIRRORED_Y:
{
wxPoint mirrorPoint = aList->m_TransformPoint;
item->Mirror_Y( mirrorPoint.x );
}
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()->EEDrawList );
GetScreen()->EEDrawList = item;
item->m_Flags = 0;
item = nextitem;
}
break;
default:
{
wxString msg;
msg.Printf( wxT( "PutDataInPreviousState() error (unknown code %X)" ),
itemWrapper.m_UndoRedoStatus );
wxMessageBox( msg );
}
break;
}
}
}
/** Function GetSchematicFromUndoList
* Undo the last edition:
* - Save the current schematic in Redo list
* - Get the previous version of the schematic from undo list
* @return none
*/
void WinEDA_SchematicFrame::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 );
// m_drawItem = NULL;
GetScreen()->SetModify();
SetSheetNumberAndCount();
ReCreateHToolbar();
SetToolbars();
TestDanglingEnds( GetScreen()->EEDrawList, NULL );
DrawPanel->Refresh( );
}
/** Function GetSchematicFromRedoList
* Redo the last edition:
* - Save the current schematic in undo list
* - Get the previous version from Redo list
* @return none
*/
void WinEDA_SchematicFrame::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 );
// m_drawItem = NULL;
GetScreen()->SetModify();
SetSheetNumberAndCount();
ReCreateHToolbar();
SetToolbars();
TestDanglingEnds( GetScreen()->EEDrawList, NULL );
DrawPanel->Refresh( );
}
/** Function ClearUndoORRedoList
* free the undo or redo list from List element
* Wrappers are deleted.
* datas pointed by wrappers are deleted if not in use in schematic
* i.e. when they are copy of a schematic item or they are no more in use
* (DELETED)
* @param aList = the UNDO_REDO_CONTAINER to clear
* @param aItemCount = the count of items to remove. < 0 for all items
* items (commands stored in list) are removed from the beginning of the list.
* So this function can be called to remove old commands
*/
void SCH_SCREEN::ClearUndoORRedoList( UNDO_REDO_CONTAINER& aList,
int aItemCount )
{
if( aItemCount == 0 )
return;
unsigned icnt = aList.m_CommandsList.size();
if( aItemCount > 0 )
icnt = aItemCount;
for( unsigned ii = 0; ii < icnt; ii++ )
{
if( aList.m_CommandsList.size() == 0 )
break;
PICKED_ITEMS_LIST* curr_cmd = aList.m_CommandsList[0];
aList.m_CommandsList.erase( aList.m_CommandsList.begin() );
curr_cmd->ClearListAndDeleteItems();
delete curr_cmd; // Delete command
}
}
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