/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2008-2011 Wayne Stambaugh <stambaughw@verizon.net>
 * Copyright (C) 2004-2019 KiCad Developers, see AUTHORS.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
 */

/**
 * eeschema/controle.cpp
 */

#include <fctsys.h>
#include <gr_basic.h>
#include <sch_draw_panel.h>
#include <eda_dde.h>
#include <sch_edit_frame.h>
#include <menus_helpers.h>
#include <msgpanel.h>
#include <bitmaps.h>

#include <eeschema_id.h>
#include <general.h>
#include <hotkeys.h>
#include <lib_edit_frame.h>
#include <viewlib_frame.h>
#include <lib_draw_item.h>
#include <lib_pin.h>
#include <sch_sheet.h>
#include <sch_sheet_path.h>
#include <sch_marker.h>
#include <sch_component.h>
#include <sch_view.h>


SCH_ITEM* SCH_EDIT_FRAME::LocateAndShowItem( const wxPoint& aPosition, const KICAD_T aFilterList[],
                                             int aHotKeyCommandId,
                                             bool* aClarificationMenuCancelled )
{
    SCH_ITEM*      item;
    LIB_PIN*       Pin     = NULL;
    SCH_COMPONENT* component = NULL;
    wxPoint        gridPosition = GetNearestGridPosition( aPosition );

    // Check the on grid position first.  There is more likely to be multiple items on
    // grid than off grid.
    m_canvas->SetAbortRequest( false ); // be sure a old abort request in not pending
    item = LocateItem( gridPosition, aFilterList, aHotKeyCommandId );

    // If the user aborted the clarification context menu, don't show it again at the
    // off grid position.
    if( !item && m_canvas->GetAbortRequest() )
    {
        if( aClarificationMenuCancelled )
            *aClarificationMenuCancelled = true;

        m_canvas->SetAbortRequest( false );
        return NULL;
    }

    if( !item && (aPosition != gridPosition) )
        item = LocateItem( aPosition, aFilterList, aHotKeyCommandId );

    if( !item )
    {
        if( aClarificationMenuCancelled )
            *aClarificationMenuCancelled = m_canvas->GetAbortRequest();

        m_canvas->SetAbortRequest( false );  // Just in case the user aborted the context menu.
        return NULL;
    }

    // Cross probing to Pcbnew if a pin or a component is found
    switch( item->Type() )
    {
    case SCH_FIELD_T:
    case LIB_FIELD_T:
        component = (SCH_COMPONENT*) item->GetParent();
        SendMessageToPCBNEW( item, component );
        break;

    case SCH_COMPONENT_T:
        component = (SCH_COMPONENT*) item;
        SendMessageToPCBNEW( item, component );
        break;

    case LIB_PIN_T:
        Pin = (LIB_PIN*) item;
        component = (SCH_COMPONENT*) LocateItem( aPosition, SCH_COLLECTOR::ComponentsOnly );
        break;

    /* case SCH_SHEET_T: */
    /*     // This may lag on larger projects */
    /*     SendMessageToPCBNEW( item, nullptr ); */
    /*     break; */
    default:
        ;
    }

    if( Pin )
    {
        // Force display pin information (the previous display could be a component info)
        MSG_PANEL_ITEMS items;

        Pin->GetMsgPanelInfo( m_UserUnits, items, component );

        SetMsgPanel( items );

        // Cross probing:2 - pin found, and send a locate pin command to Pcbnew (highlight net)
        SendMessageToPCBNEW( Pin, component );
    }

    return item;
}


SCH_ITEM* SCH_EDIT_FRAME::LocateItem( const wxPoint& aPosition, const KICAD_T aFilterList[],
                                      int aHotKeyCommandId )
{
    SCH_ITEM* item = NULL;

    m_collectedItems.Collect( GetScreen()->GetDrawItems(), aFilterList, aPosition );

    if( m_collectedItems.GetCount() == 0 )
    {
        ClearMsgPanel();
    }
    else if( m_collectedItems.GetCount() == 1 )
    {
        item = m_collectedItems[0];
    }
    else
    {
        // There are certain parent/child and enclosure combinations that can be handled
        // automatically.  Since schematics are meant to be human-readable we don't have
        // all the various overlap and coverage issues that we do in Pcbnew.
        if( m_collectedItems.GetCount() == 2 )
        {
            SCH_ITEM* a = m_collectedItems[ 0 ];
            SCH_ITEM* b = m_collectedItems[ 1 ];

            if( a->GetParent() == b )
                item = a;
            else if( a == b->GetParent() )
                item = b;
            else if( a->Type() == SCH_SHEET_T && b->Type() != SCH_SHEET_T )
                item = b;
            else if( b->Type() == SCH_SHEET_T && a->Type() != SCH_SHEET_T )
                item = a;
        }

        // There are certain combinations of items that do not need clarification such as
        // a corner were two lines meet or all the items form a junction.
        if( aHotKeyCommandId )
        {
            switch( aHotKeyCommandId )
            {
            case HK_DRAG:
                if( m_collectedItems.IsCorner() || m_collectedItems.IsNode( false )
                    || m_collectedItems.IsDraggableJunction() )
                {
                    item = m_collectedItems[0];
                }
                break;

            case HK_MOVE_COMPONENT_OR_ITEM:
                if( m_collectedItems.GetCount() == 2 &&
                        dynamic_cast< SCH_SHEET_PIN * >( m_collectedItems[0] ) &&
                        dynamic_cast< SCH_SHEET * >( m_collectedItems[1] ) )
                {
                    item = m_collectedItems[0];
                }
                break;

            default:
                ;
            }
        }

        if( item == NULL )
        {
            wxASSERT_MSG( m_collectedItems.GetCount() <= MAX_SELECT_ITEM_IDS,
                          wxT( "Select item clarification context menu size limit exceeded." ) );

            wxMenu selectMenu;

            AddMenuItem( &selectMenu, wxID_NONE, _( "Clarify Selection" ), KiBitmap( info_xpm ) );
            selectMenu.AppendSeparator();

            for( int i = 0;  i < m_collectedItems.GetCount() && i < MAX_SELECT_ITEM_IDS;  i++ )
            {
                wxString text = m_collectedItems[i]->GetSelectMenuText( m_UserUnits );
                BITMAP_DEF xpm = m_collectedItems[i]->GetMenuImage();
                AddMenuItem( &selectMenu, ID_SELECT_ITEM_START + i, text, KiBitmap( xpm ) );
            }

            // Set to NULL in case the user aborts the clarification context menu.
            GetScreen()->SetCurItem( NULL );
            m_canvas->SetAbortRequest( true );   // Changed to false if an item is selected
            PopupMenu( &selectMenu );

            if( !m_canvas->GetAbortRequest() )
            {
                m_canvas->MoveCursorToCrossHair();
                item = GetScreen()->GetCurItem();
            }
        }
    }

    GetScreen()->SetCurItem( item );

    if( item )
    {
        if( item->Type() == SCH_COMPONENT_T )
            ( (SCH_COMPONENT*) item )->SetCurrentSheetPath( &GetCurrentSheet() );

        MSG_PANEL_ITEMS items;
        item->GetMsgPanelInfo( m_UserUnits, items );
        SetMsgPanel( items );
    }
    else
    {
        ClearMsgPanel();
    }

    return item;
}


bool SCH_EDIT_FRAME::GeneralControl( wxDC* aDC, const wxPoint& aPosition, EDA_KEY aHotKey )
{
    // Filter out the 'fake' mouse motion after a keyboard movement
    if( !aHotKey && m_movingCursorWithKeyboard )
    {
        m_movingCursorWithKeyboard = false;
        return false;
    }

    // when moving mouse, use the "magnetic" grid, unless the shift+ctrl keys is pressed
    // for next cursor position
    // ( shift or ctrl key down are PAN command with mouse wheel)
    bool snapToGrid = true;

    if( !aHotKey && wxGetKeyState( WXK_SHIFT ) && wxGetKeyState( WXK_CONTROL ) )
        snapToGrid = false;

    // Cursor is left off grid only if no block in progress
    if( GetScreen()->m_BlockLocate.GetState() != STATE_NO_BLOCK )
        snapToGrid = true;

    wxPoint pos = aPosition;
    bool keyHandled = GeneralControlKeyMovement( aHotKey, &pos, snapToGrid );

    if( GetToolId() == ID_NO_TOOL_SELECTED )
        m_canvas->CrossHairOff( aDC );
    else
        m_canvas->CrossHairOn( aDC );

    GetGalCanvas()->GetViewControls()->SetSnapping( snapToGrid );
    SetCrossHairPosition( pos, snapToGrid );

    if( m_canvas->IsMouseCaptured() )
        m_canvas->CallMouseCapture( aDC, aPosition, true );

    if( aHotKey )
    {
        if( m_movingCursorWithKeyboard )
        {
            // The hotkey was a move crosshair cursor command.  We've already done the work;
            // just eat the event and reset the flag.
            m_movingCursorWithKeyboard = false;
        }
        else
        {
            SCH_SCREEN* screen = GetScreen();
            bool hk_handled;

            if( screen->GetCurItem() && screen->GetCurItem()->GetFlags() )
                hk_handled = OnHotKey( aDC, aHotKey, aPosition, screen->GetCurItem() );
            else
                hk_handled = OnHotKey( aDC, aHotKey, aPosition, NULL );

            if( hk_handled )
                keyHandled = true;
        }
    }

    UpdateStatusBar();    /* Display cursor coordinates info */

    return keyHandled;
}



bool LIB_VIEW_FRAME::GeneralControl( wxDC* aDC, const wxPoint& aPosition, EDA_KEY aHotKey )
{
    bool eventHandled = true;

    // Filter out the 'fake' mouse motion after a keyboard movement
    if( !aHotKey && m_movingCursorWithKeyboard )
    {
        m_movingCursorWithKeyboard = false;
        return false;
    }

    wxPoint pos = aPosition;
    GeneralControlKeyMovement( aHotKey, &pos, true );

    // Update cursor position.
    m_canvas->CrossHairOn( aDC );
    SetCrossHairPosition( pos, true );

    if( aHotKey )
    {
        SCH_SCREEN* screen = GetScreen();

        if( screen->GetCurItem() && screen->GetCurItem()->GetFlags() )
            eventHandled = OnHotKey( aDC, aHotKey, aPosition, screen->GetCurItem() );
        else
            eventHandled = OnHotKey( aDC, aHotKey, aPosition, NULL );
    }

    UpdateStatusBar();    // Display cursor coordinates info.

    return eventHandled;
}