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ESP8266_swiss_army_board/src/app/ScreenManager.cpp

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#include "ScreenManager.h"
ScreenManager::ScreenManager(Adafruit_SSD1306 &display, SDCardManager *sdCardManager) : _displayRef(display), _error(OK)
, _displayColorInverted(false), _displayDimmed(false), _enabled(true), _refreshRateHz(1), _refreshInterval(1000), _timeRef(0),_forceRefresh(false)
, _currentView(NO_CURRENT_VIEW), _tail(NULL)
, _viewNotFound{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL, NULL}
, _viewFuncUndefined{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL, NULL}
, _currentViewUndefined{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL, NULL}
, _viewFunctionFailedToExecute{&(displayError), (ErrorInfo *)malloc(sizeof(ErrorInfo)), RESERVED_VIEW_UID, NULL, NULL}
,_sdCardManager(sdCardManager)
{
_viewLinkedList = (ViewLinkedList) createEmptyList();
//We set the error messages :
((ErrorInfo *)_viewNotFound.pData)->errorMessage = FPSTR("View does not exist");
((ErrorInfo *)_viewFunctionFailedToExecute.pData)->errorMessage = FPSTR("View function failed\nto execute");
((ErrorInfo *)_viewFuncUndefined.pData)->errorMessage = FPSTR("View function is NULL");
}
boolean ScreenManager::init()
{
return applyCfgFromSD();
}
boolean ScreenManager::applyCfgFromSD()
{
if(_sdCardManager != NULL)
{
CFGFileParser cfgFileParser(*_sdCardManager, SCREEN_CFG_FILE);
CFGDictionary<CFGParameterValue> *cfgDictionary = (CFGDictionary<CFGParameterValue> *) cfgFileParser.parseFile();
if(cfgDictionary == NULL)
{
setDefault();
return false;
}
if( cfgDictionary->get("ENABLED") != NULL &&
cfgDictionary->get("DIMMED") != NULL &&
cfgDictionary->get("INVERTED") != NULL &&
cfgDictionary->get("ORIENTATION") != NULL &&
cfgDictionary->get("AUTO_OFF") != NULL)
{
setEnabled(cfgDictionary->get("ENABLED")->booleanValue());
_displayRef.setRotation(orientationTranslator(cfgDictionary->get("ORIENTATION")->intValue()));
_displayRef.invertDisplay(cfgDictionary->get("INVERTED")->booleanValue());
_displayRef.dim(cfgDictionary->get("DIMMED")->booleanValue());
_displayRef.setTextColor(WHITE);
delete cfgDictionary;
return true;
}
else //Default value applied
{
setDefault();
delete cfgDictionary;
return false;
}
}
else //Default value applied
{
setDefault();
return true;
}
}
void ScreenManager::setDefault()
{
_displayRef.setRotation(OR_0);
_displayRef.setTextColor(WHITE);
}
boolean ScreenManager::addView(boolean (*viewLogicFunction)(Adafruit_SSD1306&, void*), void *pData, const unsigned char UID)
{
ViewLink viewLink = {viewLogicFunction, pData, UID, NULL, NULL};
return addNewLinkAtTheEnd(&_viewLinkedList, viewLink);
}
void *ScreenManager::createEmptyList()
{
return NULL;
}
boolean ScreenManager::addNewLinkAtTheEnd(ViewLinkedList *viewLinkedList, ViewLink viewLink)
{
ViewLink *newViewLink = (ViewLink*) malloc(sizeof(ViewLink));
if(newViewLink == NULL)
{
_error = MALLOC_FAILED;
return false;
}
//Because of the const member
memcpy(newViewLink, &viewLink, sizeof(*newViewLink));
//If this is the first link
if(isListEmpty(*viewLinkedList))
{
//The link list points to the first link (aka the head)
*viewLinkedList = newViewLink;
//The previous pointer is still NULL;
//The _tail pointer is the same as the head one.
_tail = *viewLinkedList;
}
else //If there are some links already
{
ViewLinkedList *cursor = viewLinkedList;
ViewLink *previousLink = NULL;
while(*cursor != NULL)
{
previousLink = *cursor;
//We check if the UID already exists, if yes we replace the link
if((*cursor)->UID == newViewLink->UID)
{
ViewLink *toDelete = *cursor;
*cursor = newViewLink;
newViewLink->next = toDelete->next;
newViewLink->previous = toDelete->previous;
//We check if the link as a next link registered
if(toDelete->next != NULL)
{
//We update it's previous link since it's going to be deleted
toDelete->next->previous = newViewLink;
}
//We do not forget to check if the link replaced is also the tail, in this case, we must update the tail
if(_tail == toDelete)_tail = newViewLink;
free(toDelete);
return true;
}
cursor = &(*cursor)->next;
}
newViewLink->previous = previousLink;
*cursor = newViewLink;
//We need to update the tail
_tail = newViewLink;
}
return true;
}
boolean ScreenManager::removeView(const unsigned char UID)
{
return removeLinkByUID(&_viewLinkedList ,UID);
}
boolean ScreenManager::removeLinkByUID(ViewLinkedList *viewLinkedList, const unsigned char UID)
{
if(isListEmpty(*viewLinkedList))return false;
ViewLinkedList *cursor = viewLinkedList;
while(*cursor != NULL)
{
//We check if this is the link we want to delete
if((*cursor)->UID == UID)
{
ViewLink *toDelete = *cursor;
*cursor = (*cursor)->next;
if(toDelete->next != NULL)
{
//We update the previous link of the next member since it's going to be deleted
toDelete->next->previous = toDelete->previous;
}
//We also update the tail if the link we delete was the tail
if(_tail == toDelete)_tail = toDelete->previous;
free(toDelete);
return true;
}
cursor = &(*cursor)->next;
}
return false;
}
boolean ScreenManager::isListEmpty(ViewLinkedList viewLinkedList)
{
return viewLinkedList == NULL;
}
ScreenManager::Error ScreenManager::getError() const
{
return _error;
}
void ScreenManager::iterateThroughList()
{
Serial.println("Lets go through");
ViewLinkedList temp = _viewLinkedList;
while(!isListEmpty(temp))
{
Serial.print("UID : ");Serial.println(temp->UID);
temp = temp->next;
}
}
ScreenManager::ViewLink* ScreenManager::getLinkByUID(ViewLinkedList viewLinkedList, const unsigned char UID)
{
if(isListEmpty(viewLinkedList))
return NULL;
while(!isListEmpty(viewLinkedList))
{
if(viewLinkedList->UID == UID)return viewLinkedList;
viewLinkedList = viewLinkedList->next;
}
return NULL;
}
void ScreenManager::run()
{
if((millis() - _timeRef < _refreshInterval && !_forceRefresh) || !_enabled) return;
_timeRef = millis();
if(((_error == OK || _error == VIEW_FAILED_TO_EXECUTE) || _forceRefresh) && _currentView != NO_CURRENT_VIEW)
{
_displayRef.clearDisplay();
_displayRef.setCursor(0,0);
_displayRef.setTextSize(1);
switch(_error)
{
case OK:
case VIEW_FAILED_TO_EXECUTE:
if(!(*_currentView->viewLogicFunction)(_displayRef, _currentView->pData))
{
_displayRef.clearDisplay();
//Error while executing the view function
((ErrorInfo *)_viewFunctionFailedToExecute.pData)->viewUID = _currentView->UID;
(*_viewFunctionFailedToExecute.viewLogicFunction)(_displayRef, _viewFunctionFailedToExecute.pData);
_error = VIEW_FAILED_TO_EXECUTE;
}
else
_error = OK;
break;
case VIEW_NOT_FOUND:
(*_viewNotFound.viewLogicFunction)(_displayRef, _viewNotFound.pData);
break;
case VIEW_FUNC_UNDEFINED:
(*_viewFuncUndefined.viewLogicFunction)(_displayRef, _viewFuncUndefined.pData);
break;
default:
break;
}
_displayRef.display();
_forceRefresh = false;
}
}
void ScreenManager::forceRefresh()
{
if(!_enabled) return;
_forceRefresh = true;
run();
}
boolean ScreenManager::displayView(const uint8_t UID)
{
if(!_enabled) return true;
_forceRefresh = true;
ViewLink *viewLink = getLinkByUID(_viewLinkedList, UID);
if(viewLink == NULL)
{
//We display an error message on the screen
((ErrorInfo *)_viewNotFound.pData)->viewUID = UID;
_error = VIEW_NOT_FOUND;
return false;
}
else if(viewLink->viewLogicFunction == NULL)
{
//We display an error message on the screen
((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = UID;
_error = VIEW_FUNC_UNDEFINED;
_currentView = viewLink;
return false;
}
_currentView = viewLink;
_error = OK;
run();
return _error == OK;
}
void ScreenManager::displayNextView()
{
_forceRefresh = true;
_error = OK;
if(isListEmpty(_viewLinkedList))return;
if(_currentView == NO_CURRENT_VIEW)
{
_currentView = _viewLinkedList;
}
else if(!isListEmpty(_currentView->next))
{
_currentView = _currentView->next;
}
//End of the views, we cycle again :)
else if(isListEmpty(_currentView->next))
{
_currentView = _viewLinkedList;
}
//We check if the view function is defined :
if(_currentView != NO_CURRENT_VIEW)
{
if(_currentView->viewLogicFunction == NULL)
{
((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = _currentView->UID;
_error = VIEW_FUNC_UNDEFINED;
}
}
run();
}
void ScreenManager::displayPreviousView()
{
_forceRefresh = true;
_error = OK;
if(isListEmpty(_tail))return;
if(_currentView == NO_CURRENT_VIEW)
{
_currentView = _tail;
}
else if(!isListEmpty(_currentView->previous))
{
_currentView = _currentView->previous;
}
//End of the views, we cycle again :)
else if(isListEmpty(_currentView->previous))
{
_currentView = _tail;
}
//We check if the view function is defined :
if(_currentView != NO_CURRENT_VIEW)
{
if(_currentView->viewLogicFunction == NULL)
{
((ErrorInfo *)_viewFuncUndefined.pData)->viewUID = _currentView->UID;
_error = VIEW_FUNC_UNDEFINED;
}
}
run();
}
void ScreenManager::invertDisplayColor(const boolean inverted)
{
_displayRef.invertDisplay(inverted);
_displayColorInverted = inverted;
}
void ScreenManager::dimDisplay(const boolean dimmed)
{
_displayRef.dim(dimmed);
_displayDimmed = dimmed;
}
void ScreenManager::sleep()
{
_displayRef.sleep();
}
void ScreenManager::wakeUp()
{
_displayRef.wakeUp();
}
void ScreenManager::orientDisplay(const Orientation orientation)
{
_displayRef.setRotation(orientation);
}
boolean ScreenManager::isDisplayColorInverted() const
{
return _displayColorInverted;
}
Orientation ScreenManager::getDisplayOrientation() const
{
return (Orientation) _displayRef.getRotation();
}
boolean ScreenManager::isDisplayDimmed() const
{
return _displayDimmed;
}
void ScreenManager::clearDisplay(const boolean bufferOnly)
{
if(bufferOnly)
_displayRef.clearDisplay();
else
{
_displayRef.clearDisplay();
_displayRef.display();
}
}
void ScreenManager::clearViews()
{
ViewLinkedList cursor = _viewLinkedList;
while(!isListEmpty(cursor))
{
ViewLink *toDelete = cursor;
cursor = cursor->next;
free(toDelete);
}
//Do not forget to mark the list as empty
_viewLinkedList = NULL;
_tail = NULL;
}
void ScreenManager::setEnabled(boolean value)
{
_enabled = value;
if(value)
wakeUp();
else
sleep();
}
boolean ScreenManager::getEnabled()
{
return _enabled;
}
unsigned char ScreenManager::getViewCount()
{
unsigned char counter = 0;
ViewLinkedList temp = _viewLinkedList;
while(!isListEmpty(temp))
{
counter++;
temp = temp->next;
}
return counter;
}
int ScreenManager::getCurrentViewUID() const
{
if(_currentView == NO_CURRENT_VIEW)
return -1;
return _currentView->UID < 0 ? -1 : _currentView->UID;
}
boolean ScreenManager::displayError(Adafruit_SSD1306 &display, void *pData)
{
const ErrorInfo *errorInfo = (ErrorInfo *) pData;
display.setTextSize(3);
display.setCursor(19,3);
display.drawRect(0,0,display.width(), 27, WHITE);
display.print(F("ERROR"));
display.setTextSize(1);
display.setCursor(0,29);
display.print(errorInfo->errorMessage);
//We then display the view UID that caused the probleme
if(errorInfo->viewUID >= 0)
{
display.setCursor(0,56);
char buff[30] = "";
sprintf(buff,"VIEW UID : %d" ,errorInfo->viewUID);
display.println(buff);
}
return true;
}
const char* ScreenManager::getErrorMessage()const
{
//NO_VIEW_ERROR, MALLOC_FAILED, VIEW_NOT_FOUND, VIEW_FUNC_UNDEFINED, VIEW_FAILED_TO_EXECUTE, CURRENT_VIEW_UNDEFINED
switch(_error)
{
case OK:
return "NO ERROR";
case MALLOC_FAILED:
return "MALLOC FAILED";
case VIEW_NOT_FOUND:
return "VIEW NOT FOUND";
case VIEW_FUNC_UNDEFINED:
return "VIEW FUNCTION UNDEFINED (NULL)";
case VIEW_FAILED_TO_EXECUTE:
return "VIEW FAILED TO EXECUTE (RETURNED FALSE)";
case CURRENT_VIEW_UNDEFINED:
return "CURRENT VIEW UNDEFINED";
default :
return "UNKNOWN ERROR";
}
}
uint8_t ScreenManager::orientationTranslator(uint16_t degres)
{
switch(degres)
{
case 0:
return 2;
case 90:
return 3;
case 180:
return 0;
case 270:
return 1;
default :
return 2;
}
}
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