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package juloo.keyboard2;
import android.os.Handler;
import android.text.InputType;
import android.text.TextUtils;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.view.KeyEvent;
public 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;
public Autocapitalisation(Handler h, Callback cb)
{
_handler = h;
_callback = cb;
}
/**
* The events are: started, typed, event sent, selection updated
* [started] does initialisation work and must be called before any other
* event.
*/
public void started(EditorInfo info, InputConnection ic)
{
_ic = ic;
_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);
_should_update_caps_mode = started_should_update_state(info.inputType);
callback_now(true);
}
public void typed(CharSequence c)
{
for (int i = 0; i < c.length(); i++)
type_one_char(c.charAt(i));
callback(false);
}
public void event_sent(int code, int meta)
{
if (meta != 0)
{
_should_enable_shift = false;
_should_update_caps_mode = false;
return;
}
switch (code)
{
case KeyEvent.KEYCODE_DEL:
if (_cursor > 0) _cursor--;
_should_update_caps_mode = true;
break;
case KeyEvent.KEYCODE_ENTER:
_should_update_caps_mode = true;
break;
}
callback(true);
}
public void stop()
{
_should_enable_shift = false;
_should_update_caps_mode = false;
callback_now(true);
}
/** Pause auto capitalisation until [unpause()] is called. */
public boolean pause()
{
boolean was_enabled = _enabled;
stop();
_enabled = false;
return was_enabled;
}
/** Continue auto capitalisation after [pause()] was called. Argument is the
output of [pause()]. */
public void unpause(boolean was_enabled)
{
_enabled = was_enabled;
_should_update_caps_mode = true;
callback_now(true);
}
public static interface Callback
{
public void update_shift_state(boolean should_enable, boolean should_disable);
}
/** 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 && _ic != null)
{
// 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);
}
Runnable delayed_callback = new Runnable()
{
public void run()
{
if (_should_update_caps_mode && _ic != null)
{
_should_enable_shift = _enabled && (_ic.getCursorCapsMode(_caps_mode) != 0);
_should_update_caps_mode = false;
}
_callback.update_shift_state(_should_enable_shift, _should_disable_shift);
}
};
/** Update the shift state if [_should_update_caps_mode] is true, then call
[_callback.update_shift_state]. This is done after a short delay to wait
for the editor to handle the events, as this might be called before the
corresponding event is sent. */
void callback(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, 50);
}
/** Like [callback] but runs immediately. */
void callback_now(boolean might_disable)
{
_should_disable_shift = might_disable;
delayed_callback.run();
}
void type_one_char(char c)
{
_cursor++;
if (is_trigger_character(c))
_should_update_caps_mode = true;
else
_should_enable_shift = false;
}
boolean is_trigger_character(char c)
{
switch (c)
{
case ' ':
return true;
default:
return false;
}
}
/** Whether the caps state should be updated when input starts. [inputType]
is the field from the editor info object. */
boolean started_should_update_state(int inputType)
{
int class_ = inputType & InputType.TYPE_MASK_CLASS;
int variation = inputType & InputType.TYPE_MASK_VARIATION;
if (class_ != InputType.TYPE_CLASS_TEXT)
return false;
switch (variation)
{
case InputType.TYPE_TEXT_VARIATION_LONG_MESSAGE:
case InputType.TYPE_TEXT_VARIATION_NORMAL:
case InputType.TYPE_TEXT_VARIATION_PERSON_NAME:
case InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE:
case InputType.TYPE_TEXT_VARIATION_EMAIL_SUBJECT:
case InputType.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT:
return true;
default:
return false;
}
}
}
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