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fakevim: Increase/decrease octal and hexadecimal numbers

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Hexadecimal (prefix '0x' or '0X') and octal (prefix '0') numbers are
unsigned. Decimal number can be signed (with leading '-').

Preserve width of hexadecimal and octal numbers (i.e. append leading
zeroes if result is shorter or remove leading zeroes if any and result
is longer).

Change-Id: I93769546ff40a586458986909fcee1e4e9143bc2
Reviewed-by: hjk <qthjk@ovi.com>
This commit is contained in:
Lukas Holecek
2012-11-29 12:29:16 +01:00
committed by hjk
parent ec3f4d3801
commit 5919416eab
2 changed files with 88 additions and 30 deletions
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87
src/plugins/fakevim/fakevimhandler.cpp
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@@ -6877,40 +6877,67 @@ bool FakeVimHandler::Private::selectBlockTextObject(bool inner,
return true;
}
static bool isSign(const QChar c)
{
return c.unicode() == '-' || c.unicode() == '+';
}
void FakeVimHandler::Private::changeNumberTextObject(int count)
{
QTextCursor tc = cursor();
int pos = tc.position();
const int n = lastPositionInLine(lineForPosition(pos)) + 1;
QTextDocument *doc = document();
QChar c = doc->characterAt(pos);
while (!c.isNumber()) {
if (pos == n)
return;
++pos;
c = doc->characterAt(pos);
}
int p1 = pos;
while (p1 >= 1 && doc->characterAt(p1 - 1).isNumber())
--p1;
if (p1 >= 1 && isSign(doc->characterAt(p1 - 1)))
--p1;
int p2 = pos + 1;
while (p2 <= n - 1 && doc->characterAt(p2).isNumber())
++p2;
setAnchorAndPosition(p1, p2);
const QTextBlock block = this->block();
const QString lineText = block.text();
const int posMin = cursor().positionInBlock() + 1;
QString orig = selectText(currentRange());
int value = orig.toInt();
value += count;
QString repl = QString::fromLatin1("%1").arg(value);
// find first decimal, hexadecimal or octal number under or after cursor position
QRegExp re("(0[xX])(0*[0-9a-fA-F]+)|(0)(0*[0-7]+)(?=\\D|$)|(\\d+)");
int pos = 0;
while ((pos = re.indexIn(lineText, pos)) != -1 && pos + re.matchedLength() < posMin)
++pos;
if (pos == -1)
return;
int len = re.matchedLength();
QString prefix = re.cap(1) + re.cap(3);
bool hex = prefix.length() >= 2 && (prefix[1].toLower() == 'x');
bool octal = !hex && !prefix.isEmpty();
const QString num = hex ? re.cap(2) : octal ? re.cap(4) : re.cap(5);
// parse value
bool ok;
int base = hex ? 16 : octal ? 8 : 10;
qlonglong value; // decimal value
qlonglong uvalue; // hexadecimal or octal value (only unsigned)
if (hex || octal)
uvalue = num.toULongLong(&ok, base);
else
value = num.toLongLong(&ok, base);
QTC_ASSERT(ok, qDebug() << "Cannot parse number:" << num << "base:" << base; return);
// negative decimal number
if (!octal && !hex && pos > 0 && lineText[pos - 1] == '-') {
value = -value;
--pos;
++len;
}
// result to string
QString repl;
if (hex || octal)
repl = QString::number(uvalue + count, base);
else
repl = QString::number(value + count, base);
// convert hexadecimal number to upper-case if last letter was upper-case
if (hex) {
const int lastLetter = num.lastIndexOf(QRegExp("[a-fA-F]"));
if (lastLetter != -1 && num[lastLetter].isUpper())
repl = repl.toUpper();
}
// preserve leading zeroes
if ((octal || hex) && repl.size() < num.size()) {
prefix.append(QString("0").repeated(num.size() - repl.size()));
}
repl.prepend(prefix);
pos += block.position();
setAnchorAndPosition(pos, pos + len);
replaceText(currentRange(), repl);
setPosition(p1 + repl.size() - 1);
setPosition(pos + repl.size() - 1);
}
bool FakeVimHandler::Private::selectQuotedStringTextObject(bool inner,