tool_dispatcher.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013 CERN
 * Copyright (C) 2013-2021 KiCad Developers, see CHANGELOG.txt for contributors.
 * @author Tomasz Wlostowski <[email protected]>
 *
 * 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
 */
 
#include <core/ignore.h>
#include <macros.h>
#include <trace_helpers.h>
#include <tool/tool_manager.h>
#include <tool/tool_dispatcher.h>
#include <tool/actions.h>
#include <tool/action_manager.h>
#include <tool/action_menu.h>
#include <view/view.h>
#include <view/wx_view_controls.h>
#include <eda_draw_frame.h>
#include <core/kicad_algo.h>
#include <optional>
#include <wx/log.h>
#include <wx/stc/stc.h>
#include <wx/settings.h>
#include <kiplatform/app.h>
#include <kiplatform/ui.h>
 
struct TOOL_DISPATCHER::BUTTON_STATE
{
 BUTTON_STATE( TOOL_MOUSE_BUTTONS aButton, const wxEventType& aDownEvent,
 const wxEventType& aUpEvent, const wxEventType& aDblClickEvent ) :
 dragging( false ),
 pressed( false ),
 button( aButton ),
 downEvent( aDownEvent ),
 upEvent( aUpEvent ),
 dblClickEvent( aDblClickEvent )
 {};
 
 bool dragging;
 
 bool pressed;
 
 VECTOR2D dragOrigin;
 
 VECTOR2D dragOriginScreen;
 
 VECTOR2D downPosition;
 
 TOOL_MOUSE_BUTTONS button;
 
 wxEventType downEvent;
 
 wxEventType upEvent;
 
 wxEventType dblClickEvent;
 
 wxLongLong downTimestamp;
 
 void Reset()
 {
 dragging = false;
 pressed = false;
 }
 
 bool GetState() const
 {
 wxMouseState mouseState = wxGetMouseState();
 
 switch( button )
 {
 case BUT_LEFT:
 return mouseState.LeftIsDown();
 
 case BUT_MIDDLE:
 return mouseState.MiddleIsDown();
 
 case BUT_RIGHT:
 return mouseState.RightIsDown();
 
 case BUT_AUX1:
 return mouseState.Aux1IsDown();
 
 case BUT_AUX2:
 return mouseState.Aux2IsDown();
 
 default:
 assert( false );
 break;
 }
 
 return false;
 }
};
 
 
TOOL_DISPATCHER::TOOL_DISPATCHER( TOOL_MANAGER* aToolMgr ) :
 m_toolMgr( aToolMgr )
{
 m_sysDragMinX = wxSystemSettings::GetMetric( wxSYS_DRAG_X );
 m_sysDragMinY = wxSystemSettings::GetMetric( wxSYS_DRAG_Y );
 
 m_sysDragMinX = m_sysDragMinX != -1 ? m_sysDragMinX : DragDistanceThreshold;
 m_sysDragMinY = m_sysDragMinY != -1 ? m_sysDragMinY : DragDistanceThreshold;
 
 m_buttons.push_back( new BUTTON_STATE( BUT_LEFT, wxEVT_LEFT_DOWN,
 wxEVT_LEFT_UP, wxEVT_LEFT_DCLICK ) );
 m_buttons.push_back( new BUTTON_STATE( BUT_RIGHT, wxEVT_RIGHT_DOWN,
 wxEVT_RIGHT_UP, wxEVT_RIGHT_DCLICK ) );
 m_buttons.push_back( new BUTTON_STATE( BUT_MIDDLE, wxEVT_MIDDLE_DOWN,
 wxEVT_MIDDLE_UP, wxEVT_MIDDLE_DCLICK ) );
 m_buttons.push_back( new BUTTON_STATE( BUT_AUX1, wxEVT_AUX1_DOWN,
 wxEVT_AUX1_UP, wxEVT_AUX1_DCLICK ) );
 m_buttons.push_back( new BUTTON_STATE( BUT_AUX2, wxEVT_AUX2_DOWN,
 wxEVT_AUX2_UP, wxEVT_AUX2_DCLICK ) );
 
 ResetState();
}
 
 
TOOL_DISPATCHER::~TOOL_DISPATCHER()
{
 for( BUTTON_STATE* st : m_buttons )
 delete st;
}
 
 
void TOOL_DISPATCHER::ResetState()
{
 for( BUTTON_STATE* st : m_buttons )
 st->Reset();
}
 
 
KIGFX::VIEW* TOOL_DISPATCHER::getView()
{
 return m_toolMgr->GetView();
}
 
 
bool TOOL_DISPATCHER::handleMouseButton( wxEvent& aEvent, int aIndex, bool aMotion )
{
 BUTTON_STATE* st = m_buttons[aIndex];
 wxEventType type = aEvent.GetEventType();
 std::optional<TOOL_EVENT> evt;
 bool isClick = false;
 
// bool up = type == st->upEvent;
// bool down = type == st->downEvent;
 bool up = false, down = false;
 bool dblClick = type == st->dblClickEvent;
 bool state = st->GetState();
 
 if( !dblClick )
 {
 // Sometimes the dispatcher does not receive mouse button up event, so it stays
 // in the dragging mode even if the mouse button is not held anymore
 if( st->pressed && !state )
 up = true;
 // Don't apply same logic to down events as it kills touchpad tapping
 else if( !st->pressed && type == st->downEvent )
 down = true;
 }
 
 int mods = decodeModifiers( static_cast<wxMouseEvent*>( &aEvent ) );
 int args = st->button | mods;
 
 if( down ) // Handle mouse button press
 {
 st->downTimestamp = wxGetLocalTimeMillis();
 
 if( !st->pressed ) // save the drag origin on the first click only
 {
 st->dragOrigin = m_lastMousePos;
 st->dragOriginScreen = m_lastMousePosScreen;
 }
 
 st->downPosition = m_lastMousePos;
 st->pressed = true;
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_DOWN, args );
 }
 else if( up ) // Handle mouse button release
 {
 st->pressed = false;
 
 if( st->dragging )
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_UP, args );
 else
 isClick = true;
 
 if( isClick )
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_CLICK, args );
 
 st->dragging = false;
 }
 else if( dblClick )
 {
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_DBLCLICK, args );
 }
 
 if( st->pressed && aMotion )
 {
 if( !st->dragging )
 {
#ifdef __WXMAC__
 if( wxGetLocalTimeMillis() - st->downTimestamp > DragTimeThreshold )
 st->dragging = true;
#endif
 VECTOR2D offset = m_lastMousePosScreen - st->dragOriginScreen;
 
 if( abs( offset.x ) > m_sysDragMinX || abs( offset.y ) > m_sysDragMinY )
 st->dragging = true;
 
 }
 
 if( st->dragging )
 {
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_DRAG, args );
 evt->setMouseDragOrigin( st->dragOrigin );
 evt->setMouseDelta( m_lastMousePos - st->dragOrigin );
 }
 }
 
 if( evt )
 {
 evt->SetMousePosition( isClick ? st->downPosition : m_lastMousePos );
 m_toolMgr->ProcessEvent( *evt );
 
 return true;
 }
 
 return false;
}
 
 
// Helper function to know if a special key ( see key list ) should be captured
// or if the event can be skipped
// on Linux, the event must be passed to the GUI if they are not used by KiCad,
// especially the wxEVENT_CHAR_HOOK, if it is not handled
// Some keys have a predefined action in wxWidgets so, even if not used,
// the even will be not skipped
// the unused keys listed in isKeySpecialCode() will be not skipped
bool isKeySpecialCode( int aKeyCode )
{
 // These keys have predefined actions (like move thumbtrack cursor),
 // and we do not want these actions executed
 const std::vector<enum wxKeyCode> special_keys =
 {
 WXK_PAGEUP, WXK_PAGEDOWN,
 WXK_NUMPAD_PAGEUP, WXK_NUMPAD_PAGEDOWN
 };
 
 return alg::contains( special_keys, aKeyCode );
}
 
 
// Helper function to know if a key should be managed by DispatchWxEvent()
// or if the event can be ignored and skipped because the key is only a modifier
// that is not used alone in kicad
static bool isKeyModifierOnly( int aKeyCode )
{
 static std::vector<enum wxKeyCode> special_keys =
 {
 WXK_CONTROL, WXK_RAW_CONTROL, WXK_SHIFT, WXK_ALT
 };
 
 return alg::contains( special_keys, aKeyCode );
}
 
 
static bool isMouseClick( wxEventType type )
{
 return type == wxEVT_LEFT_DOWN || type == wxEVT_LEFT_UP || type == wxEVT_LEFT_DCLICK
 || type == wxEVT_MIDDLE_DOWN || type == wxEVT_MIDDLE_UP || type == wxEVT_MIDDLE_DCLICK
 || type == wxEVT_RIGHT_DOWN || type == wxEVT_RIGHT_UP || type == wxEVT_RIGHT_DCLICK
 || type == wxEVT_AUX1_DOWN || type == wxEVT_AUX1_UP || type == wxEVT_AUX1_DCLICK
 || type == wxEVT_AUX2_DOWN || type == wxEVT_AUX2_UP || type == wxEVT_AUX2_DCLICK;
}
 
 
/* A helper class that convert some special key codes to an equivalent.
 * WXK_NUMPAD_UP to WXK_UP,
 * WXK_NUMPAD_DOWN to WXK_DOWN,
 * WXK_NUMPAD_LEFT to WXK_LEFT,
 * WXK_NUMPAD_RIGHT,
 * WXK_NUMPAD_PAGEUP,
 * WXK_NUMPAD_PAGEDOWN
 * note:
 * wxEVT_CHAR_HOOK does this conversion when it is skipped by firing a wxEVT_CHAR
 * with this converted code, but we do not skip these key events because they also
 * have default action (scroll the panel)
 */
int translateSpecialCode( int aKeyCode )
{
 switch( aKeyCode )
 {
 case WXK_NUMPAD_UP: return WXK_UP;
 case WXK_NUMPAD_DOWN: return WXK_DOWN;
 case WXK_NUMPAD_LEFT: return WXK_LEFT;
 case WXK_NUMPAD_RIGHT: return WXK_RIGHT;
 case WXK_NUMPAD_PAGEUP: return WXK_PAGEUP;
 case WXK_NUMPAD_PAGEDOWN: return WXK_PAGEDOWN;
 default: break;
 };
 
 return aKeyCode;
}
 
 
std::optional<TOOL_EVENT> TOOL_DISPATCHER::GetToolEvent( wxKeyEvent* aKeyEvent, bool* keyIsSpecial )
{
 std::optional<TOOL_EVENT> evt;
 int key = aKeyEvent->GetKeyCode();
 int unicode_key = aKeyEvent->GetUnicodeKey();
 
 // This wxEVT_CHAR_HOOK event can be ignored: not useful in Kicad
 if( isKeyModifierOnly( key ) )
 {
 aKeyEvent->Skip();
 return evt;
 }
 
 wxLogTrace( kicadTraceKeyEvent, wxS( "TOOL_DISPATCHER::GetToolEvent %s" ), dump( *aKeyEvent ) );
 
 // if the key event must be skipped, skip it here if the event is a wxEVT_CHAR_HOOK
 // and do nothing.
 *keyIsSpecial = isKeySpecialCode( key );
 
 if( aKeyEvent->GetEventType() == wxEVT_CHAR_HOOK )
 key = translateSpecialCode( key );
 
 int mods = decodeModifiers( aKeyEvent );
 
 if( mods & MD_CTRL )
 {
 // wxWidgets maps key codes related to Ctrl+letter handled by CHAR_EVT
 // (http://docs.wxwidgets.org/trunk/classwx_key_event.html):
 // char events for ASCII letters in this case carry codes corresponding to the ASCII
 // value of Ctrl-Latter, i.e. 1 for Ctrl-A, 2 for Ctrl-B and so on until 26 for Ctrl-Z.
 // They are remapped here to be more easy to handle in code
 // Note also on OSX wxWidgets has a different behavior and the mapping is made
 // only for ctrl+'A' to ctlr+'Z' (unicode code return 'A' to 'Z').
 // Others OS return WXK_CONTROL_A to WXK_CONTROL_Z, and Ctrl+'M' returns the same code as
 // the return key, so the remapping does not use the unicode key value.
#ifdef __APPLE__
 if( unicode_key >= 'A' && unicode_key <= 'Z' && key >= WXK_CONTROL_A && key <= WXK_CONTROL_Z )
#else
 ignore_unused( unicode_key );
 
 if( key >= WXK_CONTROL_A && key <= WXK_CONTROL_Z )
#endif
 key += 'A' - 1;
 }
 
#ifdef __APPLE__
 if( mods & MD_ALT )
 {
 // OSX maps a bunch of commonly used extended-ASCII characters onto the keyboard
 // using the ALT key. Since we use ALT for some of our hotkeys, we need to map back
 // to the underlying keys. The kVK_ANSI_* values come from Apple and are said to be
 // hardware independent.
 switch( aKeyEvent->GetRawKeyCode() )
 {
 case /* kVK_ANSI_1 */ 0x12: key = '1'; break;
 case /* kVK_ANSI_2 */ 0x13: key = '2'; break;
 case /* kVK_ANSI_3 */ 0x14: key = '3'; break;
 case /* kVK_ANSI_4 */ 0x15: key = '4'; break;
 case /* kVK_ANSI_6 */ 0x16: key = '6'; break;
 case /* kVK_ANSI_5 */ 0x17: key = '5'; break;
 case /* kVK_ANSI_Equal */ 0x18: key = '='; break;
 case /* kVK_ANSI_9 */ 0x19: key = '9'; break;
 case /* kVK_ANSI_7 */ 0x1A: key = '7'; break;
 case /* kVK_ANSI_Minus */ 0x1B: key = '-'; break;
 case /* kVK_ANSI_8 */ 0x1C: key = '8'; break;
 case /* kVK_ANSI_0 */ 0x1D: key = '0'; break;
 default: ;
 }
 }
#endif
 
 if( key == WXK_ESCAPE ) // ESC is the special key for canceling tools
 evt = TOOL_EVENT( TC_COMMAND, TA_CANCEL_TOOL, WXK_ESCAPE );
 else
 evt = TOOL_EVENT( TC_KEYBOARD, TA_KEY_PRESSED, key | mods );
 
 return evt;
}
 
 
void TOOL_DISPATCHER::DispatchWxEvent( wxEvent& aEvent )
{
 bool motion = false;
 bool buttonEvents = false;
 VECTOR2D pos;
 std::optional<TOOL_EVENT> evt;
 bool keyIsEscape = false; // True if the keypress was the escape key
 bool keyIsSpecial = false; // True if the key is a special key code
 wxWindow* focus = wxWindow::FindFocus();
 
 // Required in win32 to ensure wxTimer events get scheduled in between other events
 // Or else we may stall them out entirely and never get them during actions like rapid
 // mouse moves.
 KIPLATFORM::APP::ForceTimerMessagesToBeCreatedIfNecessary();
 
 wxEventType type = aEvent.GetEventType();
 
 // Sometimes there is no window that has the focus (it happens when another PCB_BASE_FRAME
 // is opened and is iconized on Windows).
 // In this case, give the focus to the parent frame (GAL canvas itself does not accept the
 // focus when iconized for some obscure reason)
 if( focus == nullptr )
 {
 wxWindow* holderWindow = dynamic_cast<wxWindow*>( m_toolMgr->GetToolHolder() );
 
#if defined( _WIN32 ) || defined( __WXGTK__ )
 // Mouse events may trigger regardless of window status (windows feature)
 // However we need to avoid focus fighting (especially modals)
 if( holderWindow && KIPLATFORM::UI::IsWindowActive( holderWindow ) )
#else
 if( holderWindow )
#endif
 {
 holderWindow->SetFocus();
 }
 }
 
 if( isMouseClick( type ) )
 {
 if( m_toolMgr->GetToolHolder() && m_toolMgr->GetToolHolder()->GetToolCanvas() )
 m_toolMgr->GetToolHolder()->GetToolCanvas()->SetFocus();
 }
 
 // Mouse handling
 // Note: wxEVT_LEFT_DOWN event must always be skipped.
 if( type == wxEVT_MOTION || type == wxEVT_MOUSEWHEEL ||
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
 type == wxEVT_MAGNIFY ||
#endif
 isMouseClick( type ) ||
 // Event issued when mouse retains position in screen coordinates,
 // but changes in world coordinates (e.g. autopanning)
 type == KIGFX::WX_VIEW_CONTROLS::EVT_REFRESH_MOUSE )
 {
 wxMouseEvent* me = static_cast<wxMouseEvent*>( &aEvent );
 int mods = decodeModifiers( me );
 
 if( m_toolMgr->GetViewControls() )
 {
 pos = m_toolMgr->GetViewControls()->GetMousePosition();
 m_lastMousePosScreen = m_toolMgr->GetViewControls()->GetMousePosition( false );
 
 if( pos != m_lastMousePos )
 {
 motion = true;
 m_lastMousePos = pos;
 }
 }
 
 for( unsigned int i = 0; i < m_buttons.size(); i++ )
 buttonEvents |= handleMouseButton( aEvent, i, motion );
 
 if( m_toolMgr->GetViewControls() )
 {
 if( !buttonEvents && motion )
 {
 evt = TOOL_EVENT( TC_MOUSE, TA_MOUSE_MOTION, mods );
 evt->SetMousePosition( pos );
 }
 }
 }
 else if( type == wxEVT_CHAR_HOOK || type == wxEVT_CHAR )
 {
 wxKeyEvent* ke = static_cast<wxKeyEvent*>( &aEvent );
 
 wxLogTrace( kicadTraceKeyEvent, wxS( "TOOL_DISPATCHER::DispatchWxEvent %s" ), dump( *ke ) );
 
 // Do not process wxEVT_CHAR_HOOK for a shift-modified key, as ACTION_MANAGER::RunHotKey
 // will run the un-shifted key and that's not what we want. Wait to get the translated
 // key from wxEVT_CHAR.
 // See https://gitlab.com/kicad/code/kicad/-/issues/1809
 if( type == wxEVT_CHAR_HOOK && ke->GetModifiers() == wxMOD_SHIFT )
 {
 aEvent.Skip();
 return;
 }
 
 keyIsEscape = ( ke->GetKeyCode() == WXK_ESCAPE );
 
 if( KIUI::IsInputControlFocused( focus ) )
 {
 bool enabled = KIUI::IsInputControlEditable( focus );
 
 // Never process key events for tools when a text entry has focus
 if( enabled )
 {
 aEvent.Skip();
 return;
 }
 // Even if not enabled, allow a copy out
 else if( ke->GetModifiers() == wxMOD_CONTROL && ke->GetKeyCode() == 'C' )
 {
 aEvent.Skip();
 return;
 }
 }
 
 evt = GetToolEvent( ke, &keyIsSpecial );
 }
 else if( type == wxEVT_MENU_OPEN || type == wxEVT_MENU_CLOSE || type == wxEVT_MENU_HIGHLIGHT )
 {
 //
 // wxWidgets has several issues that we have to work around:
 //
 // 1) wxWidgets 3.0.x Windows has a bug where wxEVT_MENU_OPEN and wxEVT_MENU_HIGHLIGHT
 // events are not captured by the ACTON_MENU menus. So we forward them here.
 // (FWIW, this one is fixed in wxWidgets 3.1.x.)
 //
 // 2) wxWidgets doesn't pass the menu pointer for wxEVT_MENU_HIGHLIGHT events. So we
 // store the menu pointer from the wxEVT_MENU_OPEN call.
 //
 // 3) wxWidgets has no way to tell whether a command is from a menu selection or a
 // hotkey. So we keep track of menu highlighting so we can differentiate.
 //
 
 static ACTION_MENU* currentMenu;
 
 wxMenuEvent& menuEvent = *dynamic_cast<wxMenuEvent*>( &aEvent );
 
 if( type == wxEVT_MENU_OPEN )
 {
 currentMenu = dynamic_cast<ACTION_MENU*>( menuEvent.GetMenu() );
 
 if( currentMenu )
 currentMenu->OnMenuEvent( menuEvent );
 }
 else if( type == wxEVT_MENU_HIGHLIGHT )
 {
 if( currentMenu )
 currentMenu->OnMenuEvent( menuEvent );
 }
 else if( type == wxEVT_MENU_CLOSE )
 {
 if( currentMenu )
 currentMenu->OnMenuEvent( menuEvent );
 
 currentMenu = nullptr;
 }
 
 aEvent.Skip();
 }
 
 bool handled = false;
 
 if( evt )
 {
 wxLogTrace( kicadTraceToolStack, wxS( "TOOL_DISPATCHER::DispatchWxEvent %s" ), evt->Format() );
 
 handled = m_toolMgr->ProcessEvent( *evt );
 
 wxLogTrace( kicadTraceToolStack, wxS( "TOOL_DISPATCHER::DispatchWxEvent - Handled: %s %s" ),
 ( handled ? wxS( "true" ) : wxS( "false" ) ), evt->Format() );
 }
 
 // pass the event to the GUI, it might still be interested in it
 // Note wxEVT_CHAR_HOOK event is already skipped for special keys not used by KiCad
 // and wxEVT_LEFT_DOWN must be always Skipped.
 //
 // On OS X, key events are always meant to be caught. An uncaught key event is assumed
 // to be a user input error by OS X (as they are pressing keys in a context where nothing
 // is there to catch the event). This annoyingly makes OS X beep and/or flash the screen
 // in Pcbnew and the footprint editor any time a hotkey is used. The correct procedure is
 // to NOT pass wxEVT_CHAR events to the GUI under OS X.
 //
 // On Windows, avoid to call wxEvent::Skip for special keys because some keys
 // (PAGE_UP, PAGE_DOWN) have predefined actions (like move thumbtrack cursor), and we do
 // not want these actions executed (most are handled by KiCad)
 
 if( !evt || type == wxEVT_LEFT_DOWN )
 aEvent.Skip();
 
 // Not handled wxEVT_CHAR must be Skipped (sent to GUI).
 // Otherwise accelerators and shortcuts in main menu or toolbars are not seen.
 // Escape key presses are never skipped by the handler since they correspond to tool cancel
 // events, and if they aren't skipped then they are propagated to other frames (which we
 // don't want).
 if( ( type == wxEVT_CHAR || type == wxEVT_CHAR_HOOK )
 && !keyIsSpecial
 && !handled
 && !keyIsEscape )
 {
 aEvent.Skip();
 }
 
 wxLogTrace( kicadTraceToolStack, "TOOL_DISPATCHER::DispatchWxEvent - Wx event skipped: %s",
 ( aEvent.GetSkipped() ? "true" : "false" ) );
}