int TextBuffer::Delete (int index, int count) {
if (index < 0 || index > length) {
return 0;
} else if (count < 0) {
return -Delete(index + count, -count);
} else {
count = Math::min(count, length - index);
int oldlines = (count == 1)
? (text[index] == NEWLINE)
: LinesBetween(index, index + count);
if (lastindex > index + count) {
lastindex -= count;
lastline -= oldlines;
} else if (lastindex >= index) {
(void)LineNumber(index);
}
Memory::copy(
text + index + count, text + index, length - (index+count)
);
length -= count;
Memory::zero(text + length, count);
linecount -= oldlines;
return count;
}
}
const std::shared_ptr<TAstNode> TAstNodeForSentence::GetAstNode(TLexer* const lexer)
{
auto token = lexer->GetToken();
if (token->Type()!=TOKEN_TYPE::STRUCTURE_FOR)
{
throw TInterpreterException(TInterpreterException::WRONG_GRAMMAR, token->LineNumber());
}
std::shared_ptr<TAstNode> result(new TAstNodeForSentence(token));
result->AddChild(TAstNodeAssignSentence::GetAssignException(lexer));
AddToNode(lexer, token, result);
AddStepNode(lexer, token, result);
CheckLeftBrace(lexer);
CheckLineBreak(lexer);
AddSentenceNodes(lexer, result);
int line = lexer->PeekToken()->LineNumber();
CheckRightBrace(lexer);
CheckEofEol(lexer);
result->AddChild(TAstNodeNextSentence::GetAstNode(std::make_shared<TToken>(TOKEN_TYPE::STRUCTURE_NEXT, line)));
return result;
}
void TextDisplay::Redraw (IntCoord l, IntCoord b, IntCoord r, IntCoord t) {
if (canvas != nil) {
int first = LineNumber(t);
int last = LineNumber(b);
for (int i = first; i <= last; ++i) {
int begin = LineIndex(i, l, false);
int end = LineIndex(i, r, false);
TextLine* line = Line(i, false);
if (line != nil) {
line->Draw(this, i, begin, end);
} else {
IntCoord base = Base(i);
IntCoord top = Top(i);
painter->ClearRect(
canvas, l, Math::max(base, b), r, Math::min(top, t)
);
}
if (caretline == i && caretindex >= begin && caretindex <= end) {
ShowCaret();
}
}
}
}
