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Re: Dictionary Manager: Manipulate with records?

Subject: Re: Dictionary Manager: Manipulate with records?
From: Keisuke Hara <email@hidden>
Date: Tue, 4 Oct 2005 11:48:29 +0900
Delivered-to: email@hidden
Delivered-to: email@hidden

I want to create a custom dictionary which can be used by Dictionary.app with Dictionary Manager.

Sorry, currently there is no public information to create dictionaries usable by Dictionary.app. It is considered being published in the future system release.

4) DCMGetDictionaryFieldInfo(), AEGetDescDataSize() and AEGetDescData() returns a "field info record", whose 'descriptorType' field is 'list' and the 'dataHandle field' points to a 420 bytes lengthed memory block. So, what is "field info record"?

"Field info record" consists of various information of each "field" data category corresponding to name and address in an address book. Each field is represented by four characters "tag" and has various information such as data type and maximum length. Dictionaries must have at least one "key field" which is indexed and can be used for searching.

DCMGetNextRecord(dictRef, '****', 0, NULL, 0, maxKeySize, &nextKeySize, dataBuf, &nextUniqueID); should return the 1st record in this dictionary. But I always get a -7113 error, which means "no such field exists".

Unfortunately, you cannot iterate all records in Oxford dictionaries by this function since those dictionaries have kDCMProhibitListing (=1) value in pDCMListing (='list') property as you found. Please see: <http://developer.apple.com/documentation/Carbon/Reference/ Dictionary_Manager/dm_refchap/chapter_38.4_section_11.html#// apple_ref/doc/uid/TP30000141-DontLinkChapterID_4-C008792>

Of course, you can search Oxford dictionaries with a particular keyword using Dictionary Manager API. The key field of Oxford dictionaries is 'dsky' and body text is stored in 'dsbd' field as xml. Followings are sample code of searching Oxford dictionary for your information.


{
    OSStatus            err;
    DCMDictionaryRef    dictionaryRef;

    err = OpenOxfordDictionary( &dictionaryRef);
    if ( err == noErr )
    {
        LookupOxfordDictionary( dictionaryRef, CFSTR("test"));
        DCMCloseDictionary( dictionaryRef);
    }
}

// -----------------------------------

static OSStatus OpenOxfordDictionary( DCMDictionaryRef *dictionaryRef )
{
    OSStatus        err;
    FSRef           dictFileRef;
    FSSpec          dictFileSpec;
    DCMDictionaryID dictionaryID;

err = FSPathMakeRef( "/Library/Dictionaries/New Oxford American Dictionary.dict", &dictFileRef, NULL); if ( err == noErr ) err = FSGetCatalogInfo( &dictFileRef, kFSCatInfoNone, NULL, NULL, &dictFileSpec, NULL);

if ( err == noErr ) err = DCMGetDictionaryIDFromFile( &dictFileSpec, &dictionaryID);

    if ( err == noErr )
        err = DCMOpenDictionary( dictionaryID, 0, NULL, dictionaryRef);

    return err;
}

static void LookupOxfordDictionary( DCMDictionaryRef dictionaryRef, CFStringRef searchString ) { OSStatus err; CFIndex length = CFStringGetLength( searchString); UniChar *dataBuffer, keyBuffer[256]; DCMFieldTag keyFieldTag = 'dsky', dataFieldTag = 'dsbd'; UInt32 keySize; DCMUniqueID uniqueID; DCMFoundRecordIterator recordIterator; AEDesc dataDescList; DescType dataType; Size dataSize; CFStringRef dataString;

// Look up dictionary CFStringGetCharacters( searchString, CFRangeMake(0, length), keyBuffer); keySize = length * sizeof(UniChar); err = DCMFindRecords( dictionaryRef, keyFieldTag, keySize, keyBuffer, kDCMFindMethodExactMatch, 0, NULL, 0, 0, &recordIterator); if ( err != noErr ) return;

// Iterate found records while ( true ) { // Iterate a key from found key list err = DCMIterateFoundRecord( recordIterator, sizeof (keyBuffer), &keySize, keyBuffer, &uniqueID, NULL); if ( err != noErr ) break;

// Retrieve data record which belongs to iterated key err = DCMGetFieldData( dictionaryRef, keyFieldTag, keySize, keyBuffer, uniqueID, 1, &dataFieldTag, &dataDescList); if ( err != noErr ) break;

// Retrieve XML body text which belongs to retrieved data record AESizeOfKeyDesc( &dataDescList, dataFieldTag, &dataType, &dataSize); dataBuffer = (UniChar*)malloc( dataSize); err = AEGetKeyPtr( &dataDescList, dataFieldTag, typeUnicodeText, &dataType, dataBuffer, dataSize, &dataSize); dataString = CFStringCreateWithCharacters( NULL, dataBuffer, dataSize / sizeof(UniChar)); CFShow( dataString);

        free( dataBuffer);
        CFRelease( dataString);
        AEDisposeDesc( &dataDescList);
    }

    DCMDisposeRecordIterator( recordIterator);
}

----
Keisuke Hara
Senior Software Engineer
Apple Japan
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