private List <BrailleSymbolSlotPosition> GetNewSymbolSlots(List <BrailleCharacter> characters)
{
List <BrailleSymbolSlotPosition> symbols = new List <BrailleSymbolSlotPosition>();
int i = 0;
int length = characters.Count;
BrailleCharacter before = BlankCharacter;
BrailleCharacter beforebefore = BlankCharacter;
BrailleCharacter after;
foreach (BrailleCharacter character in characters)
{
if (i < length - 1)
{
after = characters[i + 1];
}
else
{
after = BlankCharacter;
}
foreach (BrailleSymbolSlot slot in character.GetSymbols(beforebefore, before, after))
{
BrailleSymbolSlotPosition s = new BrailleSymbolSlotPosition(slot, 0, i);
symbols.Add(s);
}
//Next
beforebefore = before;
before = character;
i++;
}
return(symbols);
}
public void AttemptWriteChar(char c)
{
int row = Cursor.Row;
int column = Cursor.Column;
BrailleCharacter newChar = GetBrailleCharacter(c);
if (newChar != null)
{
int symbolCount = Symbols[row].Count;
//Primary check if room available
if (symbolCount < CHARACTER_COLUMNS)
{
//Find current character index or select last one
List <BrailleCharacter> characters = Characters[row];
if (characters.Count == 0)
{
characters.Add(newChar);
RecalculateSymbolSlots(row);
AttemptCursorPositionOffset(0, newChar.GetSymbols(BlankCharacter, BlankCharacter, BlankCharacter).Count);
DataChanged();
return;
}
else
{
BrailleSymbolSlotPosition previous = GetSymbolSlotPositionBefore();
//Calculate new list of symbol slot position and check if it fits
List <BrailleCharacter> newCharacters = characters.ToList();
int index = previous != null ? previous.i + 1 : 0;
newCharacters.Insert(index, newChar);
int newSymbolsCount = GetNewSymbolSlots(newCharacters).Count;
if (newSymbolsCount <= CHARACTER_COLUMNS)
{
Characters[row] = newCharacters;
RecalculateSymbolSlots(row);
AttemptCursorPositionChange(row, GetLastSymbolFromCharacterColumn(index, row));
DataChanged();
return;
}
}
}
}
}
private bool IsIndependantCharacter(BrailleCharacter c)
{
return(c.Type == BrailleCharacterType.WHITESPACE || c.Type == BrailleCharacterType.LOWERCASE || c.Type == BrailleCharacterType.SYMBOL || c.Type == BrailleCharacterType.CURRENCY);
}
public List <BrailleSymbolSlot> GetSymbols(BrailleCharacter beforebefore, BrailleCharacter before, BrailleCharacter after)
{
this.symbolSlots = new List <BrailleSymbolSlot>();
if (Type == BrailleCharacterType.WHITESPACE)
{
AddSymbolSlotSpecial(WHITESPACE, false);
}
else if (Type == BrailleCharacterType.LOWERCASE)
{
if (before.Type == BrailleCharacterType.NUMBER || (beforebefore.Type == BrailleCharacterType.UPPERCASE && before.Type == BrailleCharacterType.UPPERCASE))
{
AddSymbolSlotSpecial(WHITESPACE);
}
AddSymbolSlot(Letter);
}
else if (Type == BrailleCharacterType.UPPERCASE)
{
if (before.Type != BrailleCharacterType.UPPERCASE)
{
if (!IsIndependantCharacter(before))
{
AddSymbolSlotSpecial(WHITESPACE);
}
//If the previous char is not uppercase, then add uppercase mark. If the character after it is also uppercase, then add a second mark.
AddSymbolSlotSpecial(UPPERCASE);
if (after.Type == BrailleCharacterType.UPPERCASE)
{
AddSymbolSlotSpecial(UPPERCASE);
}
}
AddSymbolSlot(Letter);
}
else if (Type == BrailleCharacterType.NUMBER)
{
//Add number mark if character before is not number
if (before.Type != BrailleCharacterType.NUMBER)
{
AddSymbolSlotSpecial(NUMBER);
}
AddSymbolSlot(Letter);
}
else
{
//Handles both money and special symbols
if (!IsIndependantCharacter(before))
{
AddSymbolSlotSpecial(WHITESPACE);
}
if (Type == BrailleCharacterType.CURRENCY)
{
AddSymbolSlotSpecial(CURRENCY);
AddSymbolSlot(Letter);
}
else if (Type == BrailleCharacterType.SYMBOL)
{
AddSymbolSlotSpecial(SYMBOL);
AddSymbolSlot(Letter);
}
}
return(symbolSlots);
}