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added a little bit of actual functionality

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2258 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Matthew Wilber 2002-12-16 03:21:35 +00:00
parent 26e97ce934
commit ce1e628f36
1 changed files with 113 additions and 2 deletions
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115
src/add-ons/translators/stxttranslator/STXTTranslator.cpp
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@ -60,7 +60,7 @@ translation_format gInputFormats[] = {
// The output formats that this translator supports.
translation_format gOutputFormats[] = {
{
B_TRANSLATOR_BITMAP,
B_TRANSLATOR_TEXT,
B_TRANSLATOR_TEXT,
TEXT_OUT_QUALITY,
TEXT_OUT_CAPABILITY,
@ -255,6 +255,64 @@ STXTTranslator::OutputFormats(int32 *out_count) const
return gOutputFormats;
}
status_t
identify_stxt_header(const TranslatorStyledTextStreamHeader &header,
BPositionIO *inSource, translator_info *outInfo, uint32 outType)
{
char buffer[20];
// Check the TEXT header
TranslatorStyledTextTextHeader txtheader;
if (inSource->Read(buffer, 16) != 16)
return B_NO_TRANSLATOR;
memcpy(&txtheader, buffer, 16);
if (swap_data(B_UINT32_TYPE, &txtheader, 16,
B_SWAP_BENDIAN_TO_HOST) != B_OK)
return B_ERROR;
if (txtheader.header.magic != 'TEXT' ||
txtheader.header.header_size !=
sizeof(TranslatorStyledTextTextHeader) ||
txtheader.charset != B_UNICODE_UTF8)
return B_NO_TRANSLATOR;
// skip the text data
off_t seekresult, pos;
pos = header.header.header_size +
txtheader.header.header_size +
txtheader.header.data_size;
seekresult = inSource->Seek(txtheader.header.data_size,
SEEK_CUR);
if (seekresult < pos)
return B_NO_TRANSLATOR;
// check the STYL header
TranslatorStyledTextStyleHeader stlheader;
if (inSource->Read(buffer, 20) != 20)
return B_NO_TRANSLATOR;
memcpy(&stlheader, buffer, 20);
if (swap_data(B_UINT32_TYPE, &stlheader, 20,
B_SWAP_BENDIAN_TO_HOST) != B_OK)
return B_ERROR;
if (stlheader.header.magic != 'STYL' ||
stlheader.header.header_size !=
sizeof(TranslatorStyledTextStyleHeader))
return B_NO_TRANSLATOR;
// return information about the data in the stream
outInfo->type = B_STYLED_TEXT_FORMAT;
outInfo->group = B_TRANSLATOR_TEXT;
outInfo->quality = STXT_IN_QUALITY;
outInfo->capability = STXT_IN_CAPABILITY;
strcpy(outInfo->name, "Be styled text file");
strcpy(outInfo->MIME, "text/x-vnd.Be-stxt");
return B_OK;
}
// ---------------------------------------------------------------
// Identify
//
@ -292,6 +350,34 @@ STXTTranslator::OutputFormats(int32 *out_count) const
// B_OK, if this translator understand the data and there were
// no errors found
// ---------------------------------------------------------------
status_t
identify_txt_header(const uint8 *data, int32 nread,
BPositionIO *inSource, translator_info *outInfo, uint32 outType)
{
uint8 ch;
for (int32 i = 0; i < nread; i++) {
ch = data[i];
// if any null characters or
// control characters (other than a few)
// are found, abort, as the data is
// probably not plain text
if (ch < 32 && ch != '\n' &&
ch != '\r' && ch != '\t' &&
ch != '\f')
return B_NO_TRANSLATOR;
}
// return information about the data in the stream
outInfo->type = B_TRANSLATOR_TEXT;
outInfo->group = B_TRANSLATOR_TEXT;
outInfo->quality = TEXT_IN_QUALITY;
outInfo->capability = TEXT_IN_CAPABILITY;
strcpy(outInfo->name, "Plain text file");
strcpy(outInfo->MIME, "text/plain");
return B_OK;
}
status_t
STXTTranslator::Identify(BPositionIO *inSource,
const translation_format *inFormat, BMessage *ioExtension,
@ -301,8 +387,33 @@ STXTTranslator::Identify(BPositionIO *inSource,
outType = B_TRANSLATOR_TEXT;
if (outType != B_TRANSLATOR_TEXT && outType != B_STYLED_TEXT_FORMAT)
return B_NO_TRANSLATOR;
uint8 buffer[16];
status_t nread = 0;
// Read in the header to determine
// if the data is supported
nread = inSource->Read(buffer, 16);
if (nread < 0)
return nread;
return B_NO_TRANSLATOR;
// read in enough data to fill the stream header
if (nread == 16) {
TranslatorStyledTextStreamHeader header;
memcpy(&header, buffer, 16);
if (swap_data(B_UINT32_TYPE, &header, 16, B_SWAP_BENDIAN_TO_HOST)
!= B_OK)
return B_ERROR;
if (header.header.magic == B_STYLED_TEXT_FORMAT &&
header.header.header_size ==
sizeof(TranslatorStyledTextStreamHeader) &&
header.header.data_size == 0 &&
header.version == 100)
return identify_stxt_header(header, inSource, outInfo, outType);
}
// if the data is not styled text, check if it is ASCII text
return identify_txt_header(buffer, nread, inSource, outInfo, outType);
}
// ---------------------------------------------------------------