public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is VocabEntity)
{
// Converts a vocab in a list of writing parts.
VocabEntity vocab = (VocabEntity)value;
if (string.IsNullOrWhiteSpace(vocab.Furigana))
{
// No furigana. Make just one part.
VocabWritingPart p = new VocabWritingPart();
p.OriginalVocab = vocab;
if (string.IsNullOrEmpty(vocab.KanjiWriting))
{
// No kanji writing. Use the kana writing.
p.Characters = new List<KanjiWritingCharacter>(vocab.KanaWriting.Length);
foreach (char c in vocab.KanaWriting)
{
p.Characters.Add(MakeCharacter(vocab, c));
}
}
else
{
// Existing kanji writing. Set the furigana to be the whole kana writing.
p.Furigana = p.Furigana = vocab.KanaWriting;
p.Characters = new List<KanjiWritingCharacter>(vocab.KanjiWriting.Length);
foreach (char c in vocab.KanjiWriting)
{
p.Characters.Add(MakeCharacter(vocab, c));
}
}
return new List<VocabWritingPart>() { p };
}
else
{
// Furigana! Cut it.
List<FuriganaPart> furiganaParts = CutFurigana(vocab.Furigana);
List<VocabWritingPart> parts = new List<VocabWritingPart>();
string currentPart = string.Empty;
// Browse each character to build the vocab writing parts.
for (int i = 0; i < vocab.KanjiWriting.Length; i++)
{
char c = vocab.KanjiWriting[i];
FuriganaPart cover = furiganaParts.FirstOrDefault(f => f.CoversIndex(i));
if (cover == null)
{
// No furigana case.
// Accumulate kana characters.
currentPart += c;
}
else
{
// A furigana covering this character exists.
// Make a new part with the accumulated kana string if not empty.
if (currentPart.Length > 0)
{
parts.Add(MakeKanaPart(vocab, currentPart));
}
currentPart = string.Empty;
// Make a new part for the furigana.
parts.Add(MakeFuriganaPart(vocab, cover));
// Advance the index to the end index.
i = cover.EndIndex;
}
}
if (currentPart.Length > 0)
{
parts.Add(MakeKanaPart(vocab, currentPart));
}
return parts;
}
}
else
{
throw new ArgumentException("This converter takes a vocab entity value.");
}
}
private VocabWritingPart MakeFuriganaPart(VocabEntity vocab, FuriganaPart furiganaPart)
{
VocabWritingPart part = new VocabWritingPart();
part.OriginalVocab = vocab;
part.Furigana = furiganaPart.Value;
part.Characters = new List<KanjiWritingCharacter>();
for (int i = furiganaPart.StartIndex; i <= furiganaPart.EndIndex; i++)
{
part.Characters.Add(MakeCharacter(vocab, vocab.KanjiWriting[i]));
}
return part;
}
private VocabWritingPart MakeKanaPart(VocabEntity vocab, string reading)
{
VocabWritingPart part = new VocabWritingPart();
part.Furigana = string.Empty;
part.OriginalVocab = vocab;
part.Characters = new List<KanjiWritingCharacter>();
foreach (char c in reading)
{
part.Characters.Add(MakeCharacter(vocab, c));
}
return part;
}