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kicad/common/tool/tool_manager.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013-2017 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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 <map>
#include <stack>
#include <algorithm>
#include <boost/optional.hpp>
#include <wx/event.h>
#include <wx/clipbrd.h>
#include <view/view.h>
#include <tool/tool_base.h>
#include <tool/tool_interactive.h>
#include <tool/tool_manager.h>
#include <tool/context_menu.h>
#include <tool/coroutine.h>
#include <tool/action_manager.h>
#include <wxPcbStruct.h>
#include <class_draw_panel_gal.h>
using boost::optional;
/// Struct describing the current execution state of a TOOL
struct TOOL_MANAGER::TOOL_STATE
{
TOOL_STATE( TOOL_BASE* aTool ) :
theTool( aTool )
{
clear();
}
TOOL_STATE( const TOOL_STATE& aState )
{
theTool = aState.theTool;
idle = aState.idle;
pendingWait = aState.pendingWait;
pendingContextMenu = aState.pendingContextMenu;
contextMenu = aState.contextMenu;
contextMenuTrigger = aState.contextMenuTrigger;
cofunc = aState.cofunc;
wakeupEvent = aState.wakeupEvent;
waitEvents = aState.waitEvents;
transitions = aState.transitions;
vcSettings = aState.vcSettings;
// do not copy stateStack
}
~TOOL_STATE()
{
assert( stateStack.empty() );
}
/// The tool itself
TOOL_BASE* theTool;
/// Is the tool active (pending execution) or disabled at the moment
bool idle;
/// Flag defining if the tool is waiting for any event (i.e. if it
/// issued a Wait() call).
bool pendingWait;
/// Is there a context menu being displayed
bool pendingContextMenu;
/// Context menu currently used by the tool
CONTEXT_MENU* contextMenu;
/// Defines when the context menu is opened
CONTEXT_MENU_TRIGGER contextMenuTrigger;
/// Tool execution context
COROUTINE<int, const TOOL_EVENT&>* cofunc;
/// The event that triggered the execution/wakeup of the tool after Wait() call
TOOL_EVENT wakeupEvent;
/// List of events the tool is currently waiting for
TOOL_EVENT_LIST waitEvents;
/// List of possible transitions (ie. association of events and state handlers that are executed
/// upon the event reception
std::vector<TRANSITION> transitions;
/// VIEW_CONTROLS settings to preserve settings when the tools are switched
KIGFX::VC_SETTINGS vcSettings;
void operator=( const TOOL_STATE& aState )
{
theTool = aState.theTool;
idle = aState.idle;
pendingWait = aState.pendingWait;
pendingContextMenu = aState.pendingContextMenu;
contextMenu = aState.contextMenu;
contextMenuTrigger = aState.contextMenuTrigger;
cofunc = aState.cofunc;
wakeupEvent = aState.wakeupEvent;
waitEvents = aState.waitEvents;
transitions = aState.transitions;
vcSettings = aState.vcSettings;
// do not copy stateStack
}
bool operator==( const TOOL_MANAGER::TOOL_STATE& aRhs ) const
{
return aRhs.theTool == this->theTool;
}
bool operator!=( const TOOL_MANAGER::TOOL_STATE& aRhs ) const
{
return aRhs.theTool != this->theTool;
}
/**
* Function Push()
* Stores the current state of the tool on stack. Stacks are stored internally and are not
* shared between different TOOL_STATE objects.
*/
void Push()
{
auto state = std::make_unique<TOOL_STATE>( *this );
stateStack.push( std::move( state ) );
clear();
}
/**
* Function Pop()
* Restores state of the tool from stack. Stacks are stored internally and are not
* shared between different TOOL_STATE objects.
* @return True if state was restored, false if the stack was empty.
*/
bool Pop()
{
delete cofunc;
if( !stateStack.empty() )
{
*this = *stateStack.top().get();
stateStack.pop();
return true;
}
else
{
cofunc = NULL;
return false;
}
}
private:
///> Stack preserving previous states of a TOOL.
std::stack<std::unique_ptr<TOOL_STATE>> stateStack;
///> Restores the initial state.
void clear()
{
idle = true;
pendingWait = false;
pendingContextMenu = false;
cofunc = NULL;
contextMenu = NULL;
contextMenuTrigger = CMENU_OFF;
vcSettings.Reset();
transitions.clear();
}
};
TOOL_MANAGER::TOOL_MANAGER() :
m_model( NULL ),
m_view( NULL ),
m_viewControls( NULL ),
m_editFrame( NULL ),
m_passEvent( false ),
m_menuActive( false )
{
m_actionMgr = new ACTION_MANAGER( this );
// Keep default VIEW_CONTROLS settings at the bottom of the stack
m_vcStack.push( KIGFX::VC_SETTINGS() );
}
TOOL_MANAGER::~TOOL_MANAGER()
{
std::map<TOOL_BASE*, TOOL_STATE*>::iterator it, it_end;
for( it = m_toolState.begin(), it_end = m_toolState.end(); it != it_end; ++it )
{
delete it->second->cofunc; // delete cofunction
delete it->second; // delete TOOL_STATE
delete it->first; // delete the tool itself
}
delete m_actionMgr;
}
void TOOL_MANAGER::RegisterTool( TOOL_BASE* aTool )
{
wxASSERT_MSG( m_toolNameIndex.find( aTool->GetName() ) == m_toolNameIndex.end(),
wxT( "Adding two tools with the same name may result in unexpected behaviour.") );
wxASSERT_MSG( m_toolIdIndex.find( aTool->GetId() ) == m_toolIdIndex.end(),
wxT( "Adding two tools with the same ID may result in unexpected behaviour.") );
wxASSERT_MSG( m_toolTypes.find( typeid( *aTool ).name() ) == m_toolTypes.end(),
wxT( "Adding two tools of the same type may result in unexpected behaviour.") );
TOOL_STATE* st = new TOOL_STATE( aTool );
m_toolState[aTool] = st;
m_toolNameIndex[aTool->GetName()] = st;
m_toolIdIndex[aTool->GetId()] = st;
m_toolTypes[typeid( *aTool ).name()] = st->theTool;
aTool->attachManager( this );
}
bool TOOL_MANAGER::InvokeTool( TOOL_ID aToolId )
{
TOOL_BASE* tool = FindTool( aToolId );
if( tool && tool->GetType() == INTERACTIVE )
return invokeTool( tool );
return false; // there is no tool with the given id
}
bool TOOL_MANAGER::InvokeTool( const std::string& aToolName )
{
TOOL_BASE* tool = FindTool( aToolName );
if( tool && tool->GetType() == INTERACTIVE )
return invokeTool( tool );
return false; // there is no tool with the given name
}
void TOOL_MANAGER::RegisterAction( TOOL_ACTION* aAction )
{
m_actionMgr->RegisterAction( aAction );
}
void TOOL_MANAGER::UnregisterAction( TOOL_ACTION* aAction )
{
m_actionMgr->UnregisterAction( aAction );
}
bool TOOL_MANAGER::RunAction( const std::string& aActionName, bool aNow, void* aParam )
{
TOOL_ACTION* action = m_actionMgr->FindAction( aActionName );
if( !action )
{
wxASSERT_MSG( false, wxString::Format( wxT( "Could not find action %s." ), aActionName ) );
return false;
}
RunAction( *action, aNow, aParam );
return false;
}
void TOOL_MANAGER::RunAction( const TOOL_ACTION& aAction, bool aNow, void* aParam )
{
TOOL_EVENT event = aAction.MakeEvent();
// Allow to override the action parameter
if( aParam )
event.SetParameter( aParam );
if( aNow )
processEvent( event );
else
PostEvent( event );
}
int TOOL_MANAGER::GetHotKey( const TOOL_ACTION& aAction )
{
return m_actionMgr->GetHotKey( aAction );
}
void TOOL_MANAGER::UpdateHotKeys()
{
m_actionMgr->UpdateHotKeys();
}
bool TOOL_MANAGER::invokeTool( TOOL_BASE* aTool )
{
wxASSERT( aTool != NULL );
TOOL_EVENT evt( TC_COMMAND, TA_ACTIVATE, aTool->GetName() );
processEvent( evt );
return true;
}
bool TOOL_MANAGER::runTool( TOOL_ID aToolId )
{
TOOL_BASE* tool = FindTool( aToolId );
if( tool && tool->GetType() == INTERACTIVE )
return runTool( tool );
return false; // there is no tool with the given id
}
bool TOOL_MANAGER::runTool( const std::string& aToolName )
{
TOOL_BASE* tool = FindTool( aToolName );
if( tool && tool->GetType() == INTERACTIVE )
return runTool( tool );
return false; // there is no tool with the given name
}
bool TOOL_MANAGER::runTool( TOOL_BASE* aTool )
{
wxASSERT( aTool != NULL );
if( !isRegistered( aTool ) )
{
wxASSERT_MSG( false, wxT( "You cannot run unregistered tools" ) );
return false;
}
TOOL_ID id = aTool->GetId();
// If the tool is already active, bring it to the top of the active tools stack
if( isActive( aTool ) )
{
m_activeTools.erase( std::find( m_activeTools.begin(), m_activeTools.end(), id ) );
m_activeTools.push_front( id );
return false;
}
aTool->Reset( TOOL_INTERACTIVE::RUN );
if( aTool->GetType() == INTERACTIVE )
static_cast<TOOL_INTERACTIVE*>( aTool )->resetTransitions();
// Add the tool on the front of the processing queue (it gets events first)
m_activeTools.push_front( id );
return true;
}
TOOL_BASE* TOOL_MANAGER::FindTool( int aId ) const
{
std::map<TOOL_ID, TOOL_STATE*>::const_iterator it = m_toolIdIndex.find( aId );
if( it != m_toolIdIndex.end() )
return it->second->theTool;
return NULL;
}
TOOL_BASE* TOOL_MANAGER::FindTool( const std::string& aName ) const
{
std::map<std::string, TOOL_STATE*>::const_iterator it = m_toolNameIndex.find( aName );
if( it != m_toolNameIndex.end() )
return it->second->theTool;
return NULL;
}
void TOOL_MANAGER::DeactivateTool()
{
// Deactivate the active tool, but do not run anything new
TOOL_EVENT evt( TC_COMMAND, TA_CANCEL_TOOL );
processEvent( evt );
}
void TOOL_MANAGER::ResetTools( TOOL_BASE::RESET_REASON aReason )
{
DeactivateTool();
for( auto& state : m_toolState )
{
TOOL_BASE* tool = state.first;
tool->Reset( aReason );
if( tool->GetType() == INTERACTIVE )
static_cast<TOOL_INTERACTIVE*>( tool )->resetTransitions();
}
}
void TOOL_MANAGER::InitTools()
{
for( auto it = m_toolState.begin(); it != m_toolState.end(); /* iteration in the loop */ )
{
TOOL_BASE* tool = it->first;
TOOL_STATE* state = it->second;
++it; // keep the iterator valid if the element is going to be erased
if( !tool->Init() )
{
wxMessageBox(
wxString::Format( "Initialization of tool '%s' failed", tool->GetName() ) );
// Unregister the tool
m_toolState.erase( tool );
m_toolNameIndex.erase( tool->GetName() );
m_toolIdIndex.erase( tool->GetId() );
m_toolTypes.erase( typeid( *tool ).name() );
delete state;
delete tool;
}
}
ResetTools( TOOL_BASE::RUN );
}
int TOOL_MANAGER::GetPriority( int aToolId ) const
{
int priority = 0;
for( auto it = m_activeTools.begin(), itEnd = m_activeTools.end(); it != itEnd; ++it )
{
if( *it == aToolId )
return priority;
++priority;
}
return -1;
}
void TOOL_MANAGER::ScheduleNextState( TOOL_BASE* aTool, TOOL_STATE_FUNC& aHandler,
const TOOL_EVENT_LIST& aConditions )
{
TOOL_STATE* st = m_toolState[aTool];
st->transitions.push_back( TRANSITION( aConditions, aHandler ) );
}
void TOOL_MANAGER::ClearTransitions( TOOL_BASE* aTool )
{
m_toolState[aTool]->transitions.clear();
}
void TOOL_MANAGER::RunMainStack( TOOL_BASE* aTool, std::function<void()> aFunc )
{
TOOL_STATE* st = m_toolState[aTool];
st->cofunc->RunMainStack( std::move( aFunc ) );
}
optional<TOOL_EVENT> TOOL_MANAGER::ScheduleWait( TOOL_BASE* aTool,
const TOOL_EVENT_LIST& aConditions )
{
TOOL_STATE* st = m_toolState[aTool];
assert( !st->pendingWait ); // everything collapses on two KiYield() in a row
// indicate to the manager that we are going to sleep and we shall be
// woken up when an event matching aConditions arrive
st->pendingWait = true;
st->waitEvents = aConditions;
// switch context back to event dispatcher loop
st->cofunc->KiYield();
return st->wakeupEvent;
}
void TOOL_MANAGER::dispatchInternal( const TOOL_EVENT& aEvent )
{
// iterate over all registered tools
for( auto it = m_activeTools.begin(); it != m_activeTools.end(); ++it )
{
TOOL_STATE* st = m_toolIdIndex[*it];
// the tool state handler is waiting for events (i.e. called Wait() method)
if( st->pendingWait )
{
if( st->waitEvents.Matches( aEvent ) )
{
// By default, only messages are passed further
m_passEvent = ( aEvent.Category() == TC_MESSAGE );
// got matching event? clear wait list and wake up the coroutine
st->wakeupEvent = aEvent;
st->pendingWait = false;
st->waitEvents.clear();
if( st->cofunc )
{
pushViewControls();
applyViewControls( st );
bool end = !st->cofunc->Resume();
saveViewControls( st );
popViewControls();
if( end )
it = finishTool( st );
}
// If the tool did not request to propagate
// the event to other tools, we should stop it now
if( !m_passEvent )
break;
}
}
}
for( auto& state : m_toolState )
{
TOOL_STATE* st = state.second;
bool finished = false;
// no state handler in progress - check if there are any transitions (defined by
// Go() method that match the event.
if( !st->transitions.empty() )
{
for( TRANSITION& tr : st->transitions )
{
if( tr.first.Matches( aEvent ) )
{
auto func_copy = tr.second;
// if there is already a context, then store it
if( st->cofunc )
st->Push();
st->cofunc = new COROUTINE<int, const TOOL_EVENT&>( std::move( func_copy ) );
// as the state changes, the transition table has to be set up again
st->transitions.clear();
// got match? Run the handler.
pushViewControls();
applyViewControls( st );
st->idle = false;
st->cofunc->Call( aEvent );
saveViewControls( st );
popViewControls();
if( !st->cofunc->Running() )
finishTool( st ); // The couroutine has finished immediately?
// if it is a message, continue processing
finished = !( aEvent.Category() == TC_MESSAGE );
// there is no point in further checking, as transitions got cleared
break;
}
}
}
if( finished )
break; // only the first tool gets the event
}
}
bool TOOL_MANAGER::dispatchStandardEvents( const TOOL_EVENT& aEvent )
{
if( aEvent.Action() == TA_KEY_PRESSED )
{
// Check if there is a hotkey associated
if( m_actionMgr->RunHotKey( aEvent.Modifier() | aEvent.KeyCode() ) )
return false; // hotkey event was handled so it does not go any further
}
return true;
}
bool TOOL_MANAGER::dispatchActivation( const TOOL_EVENT& aEvent )
{
if( aEvent.IsActivate() )
{
std::map<std::string, TOOL_STATE*>::iterator tool = m_toolNameIndex.find( *aEvent.GetCommandStr() );
if( tool != m_toolNameIndex.end() )
{
runTool( tool->second->theTool );
return true;
}
}
return false;
}
void TOOL_MANAGER::dispatchContextMenu( const TOOL_EVENT& aEvent )
{
// Store the current tool ID to decide whether to restore the cursor position
TOOL_ID activeTool = GetCurrentToolId();
for( TOOL_ID toolId : m_activeTools )
{
TOOL_STATE* st = m_toolIdIndex[toolId];
// the tool requested a context menu. The menu is activated on RMB click (CMENU_BUTTON mode)
// or immediately (CMENU_NOW) mode. The latter is used for clarification lists.
if( st->contextMenuTrigger == CMENU_OFF )
continue;
if( st->contextMenuTrigger == CMENU_BUTTON && !aEvent.IsClick( BUT_RIGHT ) )
break;
st->pendingWait = true;
st->waitEvents = TOOL_EVENT( TC_ANY, TA_ANY );
// Store the menu pointer in case it is changed by the TOOL when handling menu events
CONTEXT_MENU* m = st->contextMenu;
if( st->contextMenuTrigger == CMENU_NOW )
st->contextMenuTrigger = CMENU_OFF;
VECTOR2D cursor = m_viewControls->GetCursorPosition();
// Temporarily store the cursor position, so the tools could execute actions
// using the point where the user has invoked a context menu
if( m_viewControls->ForcedCursorPosition() )
m_origCursor = cursor;
m_viewControls->ForceCursorPosition( true, cursor );
// Display a copy of menu
std::unique_ptr<CONTEXT_MENU> menu( m->Clone() );
// Run update handlers on the created copy
menu->UpdateAll();
m_menuActive = true;
GetEditFrame()->PopupMenu( menu.get() );
m_menuActive = false;
m_viewControls->WarpCursor( cursor, true, false );
// If nothing was chosen from the context menu, we must notify the tool as well
if( menu->GetSelected() < 0 )
{
TOOL_EVENT evt( TC_COMMAND, TA_CONTEXT_MENU_CHOICE, -1 );
evt.SetParameter( m );
dispatchInternal( evt );
}
// Notify the tools that menu has been closed
TOOL_EVENT evt( TC_COMMAND, TA_CONTEXT_MENU_CLOSED );
evt.SetParameter( m );
dispatchInternal( evt );
// Restore the cursor settings if the tool is still active
if( activeTool == GetCurrentToolId() )
{
m_viewControls->ForceCursorPosition( (bool) m_origCursor,
m_origCursor.get_value_or( VECTOR2D( 0, 0 ) ) );
}
m_origCursor = boost::none;
break;
}
}
TOOL_MANAGER::ID_LIST::iterator TOOL_MANAGER::finishTool( TOOL_STATE* aState )
{
auto it = std::find( m_activeTools.begin(), m_activeTools.end(), aState->theTool->GetId() );
if( !aState->Pop() )
{
// Deactivate the tool if there are no other contexts saved on the stack
if( it != m_activeTools.end() )
it = m_activeTools.erase( it );
}
// Set transitions to be ready for future TOOL_EVENTs
TOOL_BASE* tool = aState->theTool;
if( tool->GetType() == INTERACTIVE )
static_cast<TOOL_INTERACTIVE*>( tool )->resetTransitions();
aState->idle = true;
return it;
}
void TOOL_MANAGER::ProcessEvent( const TOOL_EVENT& aEvent )
{
processEvent( aEvent );
if( TOOL_STATE* active = GetCurrentToolState() )
{
applyViewControls( active );
}
if( m_view->IsDirty() )
{
EDA_DRAW_FRAME* f = static_cast<EDA_DRAW_FRAME*>( GetEditFrame() );
f->GetGalCanvas()->Refresh(); // fixme: ugly hack, provide a method in TOOL_DISPATCHER.
}
}
void TOOL_MANAGER::ScheduleContextMenu( TOOL_BASE* aTool, CONTEXT_MENU* aMenu,
CONTEXT_MENU_TRIGGER aTrigger )
{
TOOL_STATE* st = m_toolState[aTool];
st->contextMenu = aMenu;
st->contextMenuTrigger = aTrigger;
}
bool TOOL_MANAGER::SaveClipboard( const std::string& aText )
{
if( wxTheClipboard->Open() )
{
wxTheClipboard->SetData( new wxTextDataObject( wxString( aText.c_str(), wxConvUTF8 ) ) );
wxTheClipboard->Close();
return true;
}
return false;
}
std::string TOOL_MANAGER::GetClipboard() const
{
std::string result;
if( wxTheClipboard->Open() )
{
if( wxTheClipboard->IsSupported( wxDF_TEXT ) )
{
wxTextDataObject data;
wxTheClipboard->GetData( data );
result = data.GetText().mb_str();
}
wxTheClipboard->Close();
}
return result;
}
TOOL_ID TOOL_MANAGER::MakeToolId( const std::string& aToolName )
{
static int currentId;
return currentId++;
}
void TOOL_MANAGER::SetEnvironment( EDA_ITEM* aModel, KIGFX::VIEW* aView,
KIGFX::VIEW_CONTROLS* aViewControls, wxWindow* aFrame )
{
m_model = aModel;
m_view = aView;
m_viewControls = aViewControls;
m_editFrame = aFrame;
m_actionMgr->UpdateHotKeys();
}
bool TOOL_MANAGER::isActive( TOOL_BASE* aTool )
{
if( !isRegistered( aTool ) )
return false;
// Just check if the tool is on the active tools stack
return std::find( m_activeTools.begin(), m_activeTools.end(), aTool->GetId() ) != m_activeTools.end();
}
void TOOL_MANAGER::saveViewControls( TOOL_STATE* aState )
{
aState->vcSettings = m_viewControls->GetSettings();
// If context menu has overridden the cursor position, restore the original position
// (see dispatchContextMenu())
if( m_menuActive )
{
if( m_origCursor )
{
aState->vcSettings.m_forceCursorPosition = true;
aState->vcSettings.m_forcedPosition = *m_origCursor;
}
else
{
aState->vcSettings.m_forceCursorPosition = false;
}
}
}
void TOOL_MANAGER::applyViewControls( TOOL_STATE* aState )
{
m_viewControls->ApplySettings( aState->vcSettings );
}
void TOOL_MANAGER::pushViewControls()
{
m_vcStack.push( m_viewControls->GetSettings() );
}
void TOOL_MANAGER::popViewControls()
{
m_viewControls->ApplySettings( m_vcStack.top() );
m_vcStack.pop();
}
void TOOL_MANAGER::processEvent( const TOOL_EVENT& aEvent )
{
// Early dispatch of events destined for the TOOL_MANAGER
if( !dispatchStandardEvents( aEvent ) )
return;
dispatchInternal( aEvent );
dispatchActivation( aEvent );
dispatchContextMenu( aEvent );
// Dispatch queue
while( !m_eventQueue.empty() )
{
TOOL_EVENT event = m_eventQueue.front();
m_eventQueue.pop_front();
processEvent( event );
}
}
bool TOOL_MANAGER::IsToolActive( TOOL_ID aId ) const
{
auto it = m_toolIdIndex.find( aId );
return !it->second->idle;
}
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