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EXDisplayRow.cpp
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EXDisplayRow.cpp
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#include "EXDisplayRow.h"
/*
* EXDisplayRow class implementation
*/
EXDisplayRow::EXDisplayRow(uint8_t rowNumber) {
_rowNumber = rowNumber;
_maxMalloc = 0;
_rowText = nullptr;
_changed = true;
_needsRender = false;
}
uint8_t EXDisplayRow::getRowNumber() { return _rowNumber; }
void EXDisplayRow::setRowText(char *rowText) {
// Note size limit is 254 chars but that is beyond
// the capability of the caller anyway.
// Ignore change if text the same...
if (_rowText && strcmp(_rowText, rowText) == 0)
return;
uint8_t bytesNeeded = strlen(rowText) + 1;
if (bytesNeeded > _maxMalloc || !_rowText) {
// _rowText is not big enough so realloc() it.
// Deliberately dont realloc() if its big enough to
// avolid fragmentation caused by realloc freeing
// the tail which we will probabaly need later anyway.
_rowText = (char *)realloc(_rowText, bytesNeeded);
_maxMalloc = bytesNeeded;
}
strcpy(_rowText, rowText);
_changed = true;
}
char *EXDisplayRow::getRowText() {
_changed = false; // are you sure... every time?
return _rowText;
}
bool EXDisplayRow::isChanged() { return _changed; }
void EXDisplayRow::setDisplayRow(uint8_t displayRow, uint8_t maxScreenRows) {
_displayRow = displayRow;
if (_displayRow >= maxScreenRows) {
_needsRender = false;
} else {
_needsRender = true;
}
}
uint8_t EXDisplayRow::getDisplayRow() { return _displayRow; }
bool EXDisplayRow::needsRender() { return _needsRender; }
EXDisplayRow *EXDisplayRow::getNext() { return _next; }
void EXDisplayRow::setNext(EXDisplayRow *next) { _next = next; }