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package juloo.keyboard2.suggestions;
import java.util.Arrays;
import java.util.List;
import juloo.cdict.Cdict;
import juloo.keyboard2.dict.Dictionaries;
import juloo.keyboard2.Config;
import juloo.keyboard2.ComposeKey;
import juloo.keyboard2.ComposeKeyData;
/** Keep track of the word being typed and provide suggestions for
[CandidatesView]. */
public final class Suggestions
{
Callback _callback;
Config _config;
boolean _enabled;
/** The suggestion displayed at the center of the candidates view and entered
by the space bar. */
public String best_suggestion = null;
public Suggestions(Callback c, Config conf)
{
_callback = c;
_config = conf;
}
public void started()
{
_enabled = _config.editor_config.should_show_candidates_view;
best_suggestion = null;
}
public void currently_typed_word(String word)
{
if (!_enabled)
return;
Cdict dict = _config.current_dictionary;
if (word.length() < 2 || dict == null)
{
set_suggestions(NO_SUGGESTIONS);
}
else
{
String[] dst = new String[3];
query_suggestions(dict, word, dst, 3);
set_suggestions(Arrays.asList(dst));
}
}
int query_suggestions(Cdict dict, String word, String[] dst, int max_count)
{
boolean first_char_upper = Character.isUpperCase(word.charAt(0));
word = apply_substitutions(word);
Cdict.Result r = dict.find(word);
int i = 0;
if (r.found)
dst[i++] = dict.word(r.index);
int[] suffixes = dict.suffixes(r, max_count);
// Disable distance search for small words
int[] dist = (word.length() < 3 || i + 1 >= max_count) ? NO_RESULTS :
dict.distance(word, 1, max_count);
for (int j = 0; j < max_count && i < max_count; j++)
{
if (suffixes.length > j)
dst[i++] = dict.word(suffixes[j]);
if (dist.length > j && i < max_count)
dst[i++] = dict.word(dist[j]);
}
if (first_char_upper)
capitalize_results(dst);
return i;
}
void capitalize_results(String[] rs)
{
for (int i = 0; i < rs.length; i++)
if (rs[i] != null)
rs[i] = rs[i].substring(0, 1).toUpperCase() + rs[i].substring(1);
}
/** Apply the same substitutions that were used when building the
dictionaries to find word aliases. This catches missing diacritics for
example. */
String apply_substitutions(String w)
{
StringBuilder b = new StringBuilder(w);
int len = w.length();
for (int i = 0; i < len; i++)
{
char r =
ComposeKey.transform_char(ComposeKeyData.substitutions, b.charAt(i));
if (r != 0) b.setCharAt(i, r);
}
return b.toString();
}
void set_suggestions(List<String> ws)
{
_callback.set_suggestions(ws);
best_suggestion = (ws.size() > 0) ? ws.get(0) : null;
}
static final List<String> NO_SUGGESTIONS = Arrays.asList();
static final int[] NO_RESULTS = new int[0];
public static interface Callback
{
public void set_suggestions(List<String> suggestions);
}
}
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