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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "txXSLTNumber.h"
#include "nsReadableUtils.h"
#include "txCore.h"
class txDecimalCounter : public txFormattedCounter {
public:
txDecimalCounter() : mMinLength(1), mGroupSize(50) {}
txDecimalCounter(int32_t aMinLength, int32_t aGroupSize,
const nsAString& mGroupSeparator);
virtual void appendNumber(int32_t aNumber, nsAString& aDest) override;
private:
int32_t mMinLength;
int32_t mGroupSize;
nsString mGroupSeparator;
};
class txAlphaCounter : public txFormattedCounter {
public:
explicit txAlphaCounter(char16_t aOffset) : mOffset(aOffset) {}
virtual void appendNumber(int32_t aNumber, nsAString& aDest) override;
private:
char16_t mOffset;
};
class txRomanCounter : public txFormattedCounter {
public:
explicit txRomanCounter(bool aUpper) : mTableOffset(aUpper ? 30 : 0) {}
void appendNumber(int32_t aNumber, nsAString& aDest) override;
private:
int32_t mTableOffset;
};
nsresult txFormattedCounter::getCounterFor(const nsString& aToken,
int32_t aGroupSize,
const nsAString& aGroupSeparator,
txFormattedCounter*& aCounter) {
int32_t length = aToken.Length();
NS_ASSERTION(length, "getting counter for empty token");
aCounter = 0;
if (length == 1) {
char16_t ch = aToken.CharAt(0);
switch (ch) {
case 'i':
case 'I':
aCounter = new txRomanCounter(ch == 'I');
break;
case 'a':
case 'A':
aCounter = new txAlphaCounter(ch);
break;
case '1':
default:
// if we don't recognize the token then use "1"
aCounter = new txDecimalCounter(1, aGroupSize, aGroupSeparator);
break;
}
MOZ_ASSERT(aCounter);
return NS_OK;
}
// for now, the only multi-char token we support are decimals
int32_t i;
for (i = 0; i < length - 1; ++i) {
if (aToken.CharAt(i) != '0') break;
}
if (i == length - 1 && aToken.CharAt(i) == '1') {
aCounter = new txDecimalCounter(length, aGroupSize, aGroupSeparator);
} else {
// if we don't recognize the token then use '1'
aCounter = new txDecimalCounter(1, aGroupSize, aGroupSeparator);
}
MOZ_ASSERT(aCounter);
return NS_OK;
}
txDecimalCounter::txDecimalCounter(int32_t aMinLength, int32_t aGroupSize,
const nsAString& aGroupSeparator)
: mMinLength(aMinLength),
mGroupSize(aGroupSize),
mGroupSeparator(aGroupSeparator) {
if (mGroupSize <= 0) {
mGroupSize = aMinLength + 10;
}
}
void txDecimalCounter::appendNumber(int32_t aNumber, nsAString& aDest) {
const int32_t bufsize = 10; // must be able to fit an int32_t
char16_t buf[bufsize];
int32_t pos = bufsize;
while (aNumber > 0) {
int32_t ch = aNumber % 10;
aNumber /= 10;
buf[--pos] = ch + '0';
}
// in case we didn't get a long enough string
int32_t end = (bufsize > mMinLength) ? bufsize - mMinLength : 0;
while (pos > end) {
buf[--pos] = '0';
}
// in case we *still* didn't get a long enough string.
// this should be very rare since it only happens if mMinLength is bigger
// then the length of any int32_t.
// pos will always be zero
int32_t extraPos = mMinLength;
while (extraPos > bufsize) {
aDest.Append(char16_t('0'));
--extraPos;
if (extraPos % mGroupSize == 0) {
aDest.Append(mGroupSeparator);
}
}
// copy string to buffer
if (mGroupSize >= bufsize - pos) {
// no grouping will occur
aDest.Append(buf + pos, (uint32_t)(bufsize - pos));
} else {
// append chars up to first grouping separator
int32_t len = ((bufsize - pos - 1) % mGroupSize) + 1;
aDest.Append(buf + pos, len);
pos += len;
while (bufsize - pos > 0) {
aDest.Append(mGroupSeparator);
aDest.Append(buf + pos, mGroupSize);
pos += mGroupSize;
}
NS_ASSERTION(bufsize == pos, "error while grouping");
}
}
void txAlphaCounter::appendNumber(int32_t aNumber, nsAString& aDest) {
char16_t buf[12];
buf[11] = 0;
int32_t pos = 11;
while (aNumber > 0) {
--aNumber;
int32_t ch = aNumber % 26;
aNumber /= 26;
buf[--pos] = ch + mOffset;
}
aDest.Append(buf + pos, (uint32_t)(11 - pos));
}
const char* const kTxRomanNumbers[] = {
"", "c", "cc", "ccc", "cd", "d", "dc", "dcc", "dccc", "cm",
"", "x", "xx", "xxx", "xl", "l", "lx", "lxx", "lxxx", "xc",
"", "i", "ii", "iii", "iv", "v", "vi", "vii", "viii", "ix",
"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM",
"", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC",
"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"};
void txRomanCounter::appendNumber(int32_t aNumber, nsAString& aDest) {
// Numbers bigger then 3999 and negative numbers can't be done in roman
if (uint32_t(aNumber) >= 4000) {
txDecimalCounter().appendNumber(aNumber, aDest);
return;
}
while (aNumber >= 1000) {
aDest.Append(!mTableOffset ? char16_t('m') : char16_t('M'));
aNumber -= 1000;
}
int32_t posValue;
// Hundreds
posValue = aNumber / 100;
aNumber %= 100;
AppendASCIItoUTF16(
mozilla::MakeStringSpan(kTxRomanNumbers[posValue + mTableOffset]), aDest);
// Tens
posValue = aNumber / 10;
aNumber %= 10;
AppendASCIItoUTF16(
mozilla::MakeStringSpan(kTxRomanNumbers[10 + posValue + mTableOffset]),
aDest);
// Ones
AppendASCIItoUTF16(
mozilla::MakeStringSpan(kTxRomanNumbers[20 + aNumber + mTableOffset]),
aDest);
}
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