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package juloo.keyboard2;
import android.os.Handler;
import android.os.Looper;
import android.text.InputType;
import android.text.TextUtils;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.view.KeyEvent;
final class Autocapitalisation
{
boolean _enabled = false;
boolean _should_enable_shift = false;
boolean _should_disable_shift = false;
boolean _should_update_caps_mode = false;
Handler _handler;
InputConnection _ic;
Callback _callback;
int _caps_mode;
/** Keep track of the cursor to recognize cursor movements from typing. */
int _cursor;
static int SUPPORTED_CAPS_MODES =
InputType.TYPE_TEXT_FLAG_CAP_SENTENCES |
InputType.TYPE_TEXT_FLAG_CAP_WORDS;
Runnable delayed_callback = new Runnable()
{
public void run()
{
if (_should_update_caps_mode)
{
_should_enable_shift = _enabled && (_ic.getCursorCapsMode(_caps_mode) != 0);
_should_update_caps_mode = false;
}
_callback.update_shift_state(_should_enable_shift, _should_disable_shift);
}
};
void callback(final boolean might_disable)
{
_should_disable_shift = might_disable;
// The callback must be delayed because [getCursorCapsMode] would sometimes
// be called before the editor finished handling the previous event.
_handler.postDelayed(delayed_callback, 1);
}
/**
* The events are: started, typed, event sent, selection updated
* [started] does initialisation work and must be called before any other
* event.
*/
public void started(Looper looper, Callback cb, EditorInfo info, InputConnection ic)
{
_handler = new Handler(looper);
_ic = ic;
_callback = cb;
_caps_mode = info.inputType & TextUtils.CAP_MODE_SENTENCES;
if (!Config.globalConfig().autocapitalisation || _caps_mode == 0)
{
_enabled = false;
return;
}
_enabled = true;
_should_enable_shift = (info.initialCapsMode != 0);
_callback.update_shift_state(_should_enable_shift, true);
}
public void typed(CharSequence c)
{
for (int i = 0; i < c.length(); i++)
type_one_char(c.charAt(i));
callback(false);
}
public void typed(char c)
{
type_one_char(c);
callback(false);
}
void type_one_char(char c)
{
_cursor++;
if (is_trigger_character(c))
_should_update_caps_mode = true;
else
_should_enable_shift = false;
}
public void event_sent(int code)
{
switch (code)
{
case KeyEvent.KEYCODE_DEL:
if (_cursor > 0) _cursor--;
_should_update_caps_mode = true;
break;
}
callback(true);
}
/** Returns [true] if shift might be disabled. */
public void selection_updated(int old_cursor, int new_cursor)
{
if (new_cursor == _cursor) // Just typing
return;
if (new_cursor == 0)
{
// Detect whether the input box has been cleared
CharSequence t = _ic.getTextAfterCursor(1, 0);
if (t != null && t.equals(""))
_should_update_caps_mode = true;
}
_cursor = new_cursor;
_should_enable_shift = false;
callback(true);
}
boolean is_trigger_character(char c)
{
switch (c)
{
case ' ':
return true;
default:
return false;
}
}
public static interface Callback
{
public void update_shift_state(boolean should_enable, boolean should_disable);
}
}
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