/*
* Get the difference in milliseconds between this time zone and UTC (GMT)
* NOT including DST.
*/
double getUTCOffset(ExecState* exec)
{
double utcOffset = exec->globalData().cachedUTCOffset;
if (!isnan(utcOffset))
return utcOffset;
exec->globalData().cachedUTCOffset = calculateUTCOffset();
return exec->globalData().cachedUTCOffset;
}
// Returns combined offset in millisecond (UTC + DST).
LocalTimeOffset calculateLocalTimeOffset(double ms, TimeType inputTimeType)
{
#if HAVE(TM_GMTOFF)
double localToUTCTimeOffset = inputTimeType == LocalTime ? calculateUTCOffset() : 0;
#else
double localToUTCTimeOffset = calculateUTCOffset();
#endif
if (inputTimeType == LocalTime)
ms -= localToUTCTimeOffset;
// On Mac OS X, the call to localtime (see calculateDSTOffset) will return historically accurate
// DST information (e.g. New Zealand did not have DST from 1946 to 1974) however the JavaScript
// standard explicitly dictates that historical information should not be considered when
// determining DST. For this reason we shift away from years that localtime can handle but would
// return historically accurate information.
int year = msToYear(ms);
int equivalentYear = equivalentYearForDST(year);
if (year != equivalentYear) {
bool leapYear = isLeapYear(year);
int dayInYearLocal = dayInYear(ms, year);
int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);
int month = monthFromDayInYear(dayInYearLocal, leapYear);
double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);
ms = (day * msPerDay) + msToMilliseconds(ms);
}
double localTimeSeconds = ms / msPerSecond;
if (localTimeSeconds > maxUnixTime)
localTimeSeconds = maxUnixTime;
else if (localTimeSeconds < 0) // Go ahead a day to make localtime work (does not work with 0).
localTimeSeconds += secondsPerDay;
// FIXME: time_t has a potential problem in 2038.
time_t localTime = static_cast<time_t>(localTimeSeconds);
#if HAVE(TM_GMTOFF)
tm localTM;
getLocalTime(&localTime, &localTM);
return LocalTimeOffset(localTM.tm_isdst, localTM.tm_gmtoff * msPerSecond);
#else
double dstOffset = calculateDSTOffset(localTime, localToUTCTimeOffset);
return LocalTimeOffset(dstOffset, localToUTCTimeOffset + dstOffset);
#endif
}
static int currentFullYear()
{
double current = currentTimeMS();
double utcOffset = calculateUTCOffset();
double dstOffset = calculateDSTOffset(current, utcOffset);
int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
current += offset * msPerMinute;
DateComponents date;
date.setMillisecondsSinceEpochForMonth(current);
return date.fullYear();
}
int DateTimeYearFieldElement::defaultValueForStepDown() const
{
double current = currentTimeMS();
double utcOffset = calculateUTCOffset();
double dstOffset = calculateDSTOffset(current, utcOffset);
int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
current += offset * msPerMinute;
DateComponents date;
date.setMillisecondsSinceEpochForMonth(current);
return date.fullYear();
}
Decimal MonthInputType::defaultValueForStepUp() const
{
double current = currentTimeMS();
double utcOffset = calculateUTCOffset();
double dstOffset = calculateDSTOffset(current, utcOffset);
int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
current += offset * msPerMinute;
DateComponents date;
date.setMillisecondsSinceEpochForMonth(current);
double months = date.monthsSinceEpoch();
ASSERT(std::isfinite(months));
return Decimal::fromDouble(months);
}
double parseDateFromNullTerminatedCharacters(const char* dateString)
{
bool haveTZ;
int offset;
double ms = parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
if (isnan(ms))
return NaN;
// fall back to local timezone
if (!haveTZ) {
double utcOffset = calculateUTCOffset();
double dstOffset = calculateDSTOffset(ms, utcOffset);
offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
}
return ms - (offset * msPerMinute);
}
double parseDateFromNullTerminatedCharacters(const char* dateString)
{
bool haveTZ;
int offset;
double ms = parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
if (std::isnan(ms))
return std::numeric_limits<double>::quiet_NaN();
// fall back to local timezone
if (!haveTZ) {
double utcOffset = calculateUTCOffset();
double dstOffset = calculateDSTOffset(ms, utcOffset);
offset = (utcOffset + dstOffset) / msPerMinute;
}
return ms - (offset * msPerMinute);
}
void initializeDates()
{
#ifndef NDEBUG
static bool alreadyInitialized;
ASSERT(!alreadyInitialized++);
#endif
equivalentYearForDST(2000); // Need to call once to initialize a static used in this function.
#if PLATFORM(DARWIN)
// Register for a notification whenever the time zone changes.
uint32_t status = notify_register_check("com.apple.system.timezone", &s_notificationToken);
if (status == NOTIFY_STATUS_OK) {
s_cachedUTCOffset = calculateUTCOffset();
s_haveCachedUTCOffset = true;
}
#endif
}
/*
* Get the difference in milliseconds between this time zone and UTC (GMT)
* NOT including DST.
*/
double getUTCOffset()
{
#if PLATFORM(DARWIN)
if (s_haveCachedUTCOffset) {
int notified;
uint32_t status = notify_check(s_notificationToken, ¬ified);
if (status == NOTIFY_STATUS_OK && !notified)
return s_cachedUTCOffset;
}
#endif
int32_t utcOffset = calculateUTCOffset();
#if PLATFORM(DARWIN)
// Theoretically, it is possible that several threads will be executing this code at once, in which case we will have a race condition,
// and a newer value may be overwritten. In practice, time zones don't change that often.
s_cachedUTCOffset = utcOffset;
#endif
return utcOffset;
}
PassRefPtr<SharedBuffer> MHTMLArchive::generateMHTMLData(Page* page, bool useBinaryEncoding)
{
Vector<PageSerializer::Resource> resources;
PageSerializer pageSerializer(&resources);
pageSerializer.serialize(page);
String boundary = generateRandomBoundary();
String endOfResourceBoundary = makeString("--", boundary, "\r\n");
tm localTM;
getCurrentLocalTime(&localTM);
String dateString = makeRFC2822DateString(localTM.tm_wday, localTM.tm_mday, localTM.tm_mon, 1900 + localTM.tm_year, localTM.tm_hour, localTM.tm_min, localTM.tm_sec, calculateUTCOffset() / (1000 * 60));
StringBuilder stringBuilder;
stringBuilder.append("From: <Saved by WebKit>\r\n");
stringBuilder.append("Subject: ");
// We replace non ASCII characters with '?' characters to match IE's behavior.
stringBuilder.append(replaceNonPrintableCharacters(page->mainFrame()->document()->title()));
stringBuilder.append("\r\nDate: ");
stringBuilder.append(dateString);
stringBuilder.append("\r\nMIME-Version: 1.0\r\n");
stringBuilder.append("Content-Type: multipart/related;\r\n");
stringBuilder.append("\ttype=\"");
stringBuilder.append(page->mainFrame()->document()->suggestedMIMEType());
stringBuilder.append("\";\r\n");
stringBuilder.append("\tboundary=\"");
stringBuilder.append(boundary);
stringBuilder.append("\"\r\n\r\n");
// We use utf8() below instead of ascii() as ascii() replaces CRLFs with ?? (we still only have put ASCII characters in it).
ASSERT(stringBuilder.toString().containsOnlyASCII());
CString asciiString = stringBuilder.toString().utf8();
RefPtr<SharedBuffer> mhtmlData = SharedBuffer::create();
mhtmlData->append(asciiString.data(), asciiString.length());
for (size_t i = 0; i < resources.size(); ++i) {
const PageSerializer::Resource& resource = resources[i];
stringBuilder.clear();
stringBuilder.append(endOfResourceBoundary);
stringBuilder.append("Content-Type: ");
stringBuilder.append(resource.mimeType);
const char* contentEncoding = 0;
if (useBinaryEncoding)
contentEncoding = binary;
else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(resource.mimeType) || MIMETypeRegistry::isSupportedNonImageMIMEType(resource.mimeType))
contentEncoding = quotedPrintable;
else
contentEncoding = base64;
stringBuilder.append("\r\nContent-Transfer-Encoding: ");
stringBuilder.append(contentEncoding);
stringBuilder.append("\r\nContent-Location: ");
stringBuilder.append(resource.url);
stringBuilder.append("\r\n\r\n");
asciiString = stringBuilder.toString().utf8();
mhtmlData->append(asciiString.data(), asciiString.length());
if (!strcmp(contentEncoding, binary)) {
const char* data;
size_t position = 0;
while (size_t length = resource.data->getSomeData(data, position)) {
mhtmlData->append(data, length);
position += length;
}
} else {
// FIXME: ideally we would encode the content as a stream without having to fetch it all.
const char* data = resource.data->data();
size_t dataLength = resource.data->size();
Vector<char> encodedData;
if (!strcmp(contentEncoding, quotedPrintable)) {
quotedPrintableEncode(data, dataLength, encodedData);
mhtmlData->append(encodedData.data(), encodedData.size());
mhtmlData->append("\r\n", 2);
} else {
ASSERT(!strcmp(contentEncoding, base64));
// We are not specifying insertLFs = true below as it would cut the lines with LFs and MHTML requires CRLFs.
base64Encode(data, dataLength, encodedData);
const size_t maximumLineLength = 76;
size_t index = 0;
size_t encodedDataLength = encodedData.size();
do {
size_t lineLength = std::min(encodedDataLength - index, maximumLineLength);
mhtmlData->append(encodedData.data() + index, lineLength);
mhtmlData->append("\r\n", 2);
index += maximumLineLength;
} while (index < encodedDataLength);
}
}
}
asciiString = makeString("--", boundary, "--\r\n").utf8();
mhtmlData->append(asciiString.data(), asciiString.length());
return mhtmlData.release();
}