mirror of
https://github.com/Julow/Unexpected-Keyboard.git
synced 2025-02-20 11:31:05 +01:00
This doesn't fix a bug but remove some tricky code. The shift key is no longer different when the "double tap for capslock" option is on. The handling of the option is moved to Pointer instead and becomes simpler.
800 lines
22 KiB
Java
800 lines
22 KiB
Java
package juloo.keyboard2;
|
|
|
|
import android.os.Handler;
|
|
import android.os.Message;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import java.util.Iterator;
|
|
import java.util.NoSuchElementException;
|
|
|
|
/**
|
|
* Manage pointers (fingers) on the screen and long presses.
|
|
* Call back to IPointerEventHandler.
|
|
*/
|
|
public final class Pointers implements Handler.Callback
|
|
{
|
|
public static final int FLAG_P_LATCHABLE = 1;
|
|
public static final int FLAG_P_LATCHED = (1 << 1);
|
|
public static final int FLAG_P_FAKE = (1 << 2);
|
|
public static final int FLAG_P_DOUBLE_TAP_LOCK = (1 << 3);
|
|
public static final int FLAG_P_LOCKED = (1 << 4);
|
|
public static final int FLAG_P_SLIDING = (1 << 5);
|
|
/** Clear latched (only if also FLAG_P_LATCHABLE set). */
|
|
public static final int FLAG_P_CLEAR_LATCHED = (1 << 6);
|
|
/** Can't be locked, even when long pressing. */
|
|
public static final int FLAG_P_CANT_LOCK = (1 << 7);
|
|
|
|
private Handler _longpress_handler;
|
|
private ArrayList<Pointer> _ptrs = new ArrayList<Pointer>();
|
|
private IPointerEventHandler _handler;
|
|
private Config _config;
|
|
|
|
public Pointers(IPointerEventHandler h, Config c)
|
|
{
|
|
_longpress_handler = new Handler(this);
|
|
_handler = h;
|
|
_config = c;
|
|
}
|
|
|
|
/** Return the list of modifiers currently activated. */
|
|
public Modifiers getModifiers()
|
|
{
|
|
return getModifiers(false);
|
|
}
|
|
|
|
/** When [skip_latched] is true, don't take flags of latched keys into account. */
|
|
private Modifiers getModifiers(boolean skip_latched)
|
|
{
|
|
int n_ptrs = _ptrs.size();
|
|
KeyValue[] mods = new KeyValue[n_ptrs];
|
|
int n_mods = 0;
|
|
for (int i = 0; i < n_ptrs; i++)
|
|
{
|
|
Pointer p = _ptrs.get(i);
|
|
if (p.value != null
|
|
&& !(skip_latched && p.hasFlagsAny(FLAG_P_LATCHED)
|
|
&& (p.flags & FLAG_P_LOCKED) == 0))
|
|
mods[n_mods++] = p.value;
|
|
}
|
|
return Modifiers.ofArray(mods, n_mods);
|
|
}
|
|
|
|
public void clear()
|
|
{
|
|
for (Pointer p : _ptrs)
|
|
stopLongPress(p);
|
|
_ptrs.clear();
|
|
}
|
|
|
|
public boolean isKeyDown(KeyboardData.Key k)
|
|
{
|
|
for (Pointer p : _ptrs)
|
|
if (p.key == k)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/** See [FLAG_P_*] flags. Returns [-1] if the key is not pressed. */
|
|
public int getKeyFlags(KeyValue kv)
|
|
{
|
|
for (Pointer p : _ptrs)
|
|
if (p.value != null && p.value.equals(kv))
|
|
return p.flags;
|
|
return -1;
|
|
}
|
|
|
|
/** The key must not be already latched . */
|
|
void add_fake_pointer(KeyboardData.Key key, KeyValue kv, boolean locked)
|
|
{
|
|
int flags = pointer_flags_of_kv(kv) | FLAG_P_FAKE | FLAG_P_LATCHED;
|
|
if (locked)
|
|
flags |= FLAG_P_LOCKED;
|
|
Pointer ptr = new Pointer(-1, key, kv, 0.f, 0.f, Modifiers.EMPTY, flags);
|
|
_ptrs.add(ptr);
|
|
_handler.onPointerFlagsChanged(false);
|
|
}
|
|
|
|
/** Set whether a key is latched or locked by adding a "fake" pointer, a
|
|
pointer that is not due to user interaction.
|
|
This is used by auto-capitalisation.
|
|
|
|
When [lock] is true, [latched] control whether the modifier is locked or disabled.
|
|
When [lock] is false, an existing locked pointer is not affected. */
|
|
public void set_fake_pointer_state(KeyboardData.Key key, KeyValue kv,
|
|
boolean latched, boolean lock)
|
|
{
|
|
Pointer ptr = getLatched(key, kv);
|
|
if (ptr == null)
|
|
{
|
|
// No existing pointer, latch the key.
|
|
if (latched)
|
|
add_fake_pointer(key, kv, lock);
|
|
}
|
|
else if ((ptr.flags & FLAG_P_FAKE) == 0)
|
|
{} // Key already latched but not by a fake ptr, do nothing.
|
|
else if (lock)
|
|
{
|
|
// Acting on locked modifiers, replace the pointer each time.
|
|
removePtr(ptr);
|
|
if (latched)
|
|
add_fake_pointer(key, kv, lock);
|
|
}
|
|
else if ((ptr.flags & FLAG_P_LOCKED) != 0)
|
|
{} // Existing ptr is locked but [lock] is false, do not continue.
|
|
else if (!latched)
|
|
{
|
|
// Key is latched by a fake ptr. Unlatch if requested.
|
|
removePtr(ptr);
|
|
_handler.onPointerFlagsChanged(false);
|
|
}
|
|
}
|
|
|
|
// Receiving events
|
|
|
|
public void onTouchUp(int pointerId)
|
|
{
|
|
Pointer ptr = getPtr(pointerId);
|
|
if (ptr == null)
|
|
return;
|
|
if (ptr.hasFlagsAny(FLAG_P_SLIDING))
|
|
{
|
|
clearLatched();
|
|
ptr.sliding.onTouchUp(ptr);
|
|
return;
|
|
}
|
|
stopLongPress(ptr);
|
|
KeyValue ptr_value = ptr.value;
|
|
if (ptr.gesture != null && ptr.gesture.is_in_progress())
|
|
{
|
|
// A gesture was in progress
|
|
ptr.gesture.pointer_up();
|
|
}
|
|
Pointer latched = getLatched(ptr);
|
|
if (latched != null) // Already latched
|
|
{
|
|
removePtr(ptr); // Remove dupplicate
|
|
if ((latched.flags & FLAG_P_DOUBLE_TAP_LOCK) != 0) // Toggle lockable key
|
|
lockPointer(latched, false);
|
|
else // Otherwise, unlatch
|
|
{
|
|
removePtr(latched);
|
|
_handler.onPointerUp(ptr_value, ptr.modifiers);
|
|
}
|
|
}
|
|
else if ((ptr.flags & FLAG_P_LATCHABLE) != 0)
|
|
{
|
|
// Latchable but non-special keys must clear latched.
|
|
if ((ptr.flags & FLAG_P_CLEAR_LATCHED) != 0)
|
|
clearLatched();
|
|
ptr.flags |= FLAG_P_LATCHED;
|
|
ptr.pointerId = -1;
|
|
_handler.onPointerFlagsChanged(false);
|
|
}
|
|
else
|
|
{
|
|
clearLatched();
|
|
removePtr(ptr);
|
|
_handler.onPointerUp(ptr_value, ptr.modifiers);
|
|
}
|
|
}
|
|
|
|
public void onTouchCancel()
|
|
{
|
|
clear();
|
|
_handler.onPointerFlagsChanged(true);
|
|
}
|
|
|
|
/* Whether an other pointer is down on a non-special key. */
|
|
private boolean isOtherPointerDown()
|
|
{
|
|
for (Pointer p : _ptrs)
|
|
if (!p.hasFlagsAny(FLAG_P_LATCHED) &&
|
|
(p.value == null || !p.value.hasFlagsAny(KeyValue.FLAG_SPECIAL)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
public void onTouchDown(float x, float y, int pointerId, KeyboardData.Key key)
|
|
{
|
|
// Ignore new presses while a sliding key is active. On some devices, ghost
|
|
// touch events can happen while the pointer travels on top of other keys.
|
|
if (isSliding())
|
|
return;
|
|
// Don't take latched modifiers into account if an other key is pressed.
|
|
// The other key already "own" the latched modifiers and will clear them.
|
|
Modifiers mods = getModifiers(isOtherPointerDown());
|
|
KeyValue value = _handler.modifyKey(key.keys[0], mods);
|
|
Pointer ptr = make_pointer(pointerId, key, value, x, y, mods);
|
|
_ptrs.add(ptr);
|
|
startLongPress(ptr);
|
|
_handler.onPointerDown(value, false);
|
|
}
|
|
|
|
static final int[] DIRECTION_TO_INDEX = new int[]{
|
|
7, 2, 2, 6, 6, 4, 4, 8, 8, 3, 3, 5, 5, 1, 1, 7
|
|
};
|
|
|
|
/**
|
|
* [direction] is an int between [0] and [15] that represent 16 sections of a
|
|
* circle, clockwise, starting at the top.
|
|
*/
|
|
KeyValue getKeyAtDirection(KeyboardData.Key k, int direction)
|
|
{
|
|
return k.keys[DIRECTION_TO_INDEX[direction]];
|
|
}
|
|
|
|
/**
|
|
* Get the key nearest to [direction] that is not key0. Take care
|
|
* of applying [_handler.modifyKey] to the selected key in the same
|
|
* operation to be sure to treat removed keys correctly.
|
|
* Return [null] if no key could be found in the given direction or
|
|
* if the selected key didn't change.
|
|
*/
|
|
private KeyValue getNearestKeyAtDirection(Pointer ptr, int direction)
|
|
{
|
|
KeyValue k;
|
|
// [i] is [0, -1, 1, -2, 2, ...]
|
|
for (int i = 0; i > -4; i = (~i>>31) - i)
|
|
{
|
|
int d = (direction + i + 16) % 16;
|
|
// Don't make the difference between a key that doesn't exist and a key
|
|
// that is removed by [_handler]. Triggers side effects.
|
|
k = _handler.modifyKey(getKeyAtDirection(ptr.key, d), ptr.modifiers);
|
|
if (k != null)
|
|
return k;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public void onTouchMove(float x, float y, int pointerId)
|
|
{
|
|
Pointer ptr = getPtr(pointerId);
|
|
if (ptr == null)
|
|
return;
|
|
if (ptr.hasFlagsAny(FLAG_P_SLIDING))
|
|
{
|
|
ptr.sliding.onTouchMove(ptr, x);
|
|
return;
|
|
}
|
|
|
|
// The position in a IME windows is clampled to view.
|
|
// For a better up swipe behaviour, set the y position to a negative value when clamped.
|
|
if (y == 0.0) y = -400;
|
|
float dx = x - ptr.downX;
|
|
float dy = y - ptr.downY;
|
|
|
|
float dist = Math.abs(dx) + Math.abs(dy);
|
|
if (dist < _config.swipe_dist_px)
|
|
{
|
|
// Pointer is still on the center.
|
|
if (ptr.gesture == null || !ptr.gesture.is_in_progress())
|
|
return;
|
|
// Gesture ended
|
|
ptr.gesture.moved_to_center();
|
|
ptr.value = apply_gesture(ptr, ptr.gesture.get_gesture());
|
|
ptr.flags = 0;
|
|
|
|
}
|
|
else
|
|
{ // Pointer is on a quadrant.
|
|
// See [getKeyAtDirection()] for the meaning. The starting point on the
|
|
// circle is the top direction.
|
|
double a = Math.atan2(dy, dx) + Math.PI;
|
|
// a is between 0 and 2pi, 0 is pointing to the left
|
|
// add 12 to align 0 to the top
|
|
int direction = ((int)(a * 8 / Math.PI) + 12) % 16;
|
|
if (ptr.gesture == null)
|
|
{ // Gesture starts
|
|
|
|
ptr.gesture = new Gesture(direction);
|
|
KeyValue new_value = getNearestKeyAtDirection(ptr, direction);
|
|
if (new_value != null)
|
|
{ // Pointer is swiping into a side key.
|
|
|
|
ptr.value = new_value;
|
|
ptr.flags = pointer_flags_of_kv(new_value);
|
|
// Sliding mode is entered when key5 or key6 is down on a slider key.
|
|
if (ptr.key.slider &&
|
|
(new_value.equals(ptr.key.getKeyValue(5))
|
|
|| new_value.equals(ptr.key.getKeyValue(6))))
|
|
{
|
|
startSliding(ptr, x);
|
|
}
|
|
_handler.onPointerDown(new_value, true);
|
|
}
|
|
|
|
}
|
|
else if (ptr.gesture.changed_direction(direction))
|
|
{ // Gesture changed state
|
|
if (!ptr.gesture.is_in_progress())
|
|
{ // Gesture ended
|
|
_handler.onPointerFlagsChanged(true);
|
|
}
|
|
else
|
|
{
|
|
ptr.value = apply_gesture(ptr, ptr.gesture.get_gesture());
|
|
restartLongPress(ptr);
|
|
ptr.flags = 0; // Special behaviors are ignored during a gesture.
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Pointers management
|
|
|
|
private Pointer getPtr(int pointerId)
|
|
{
|
|
for (Pointer p : _ptrs)
|
|
if (p.pointerId == pointerId)
|
|
return p;
|
|
return null;
|
|
}
|
|
|
|
private void removePtr(Pointer ptr)
|
|
{
|
|
_ptrs.remove(ptr);
|
|
}
|
|
|
|
private Pointer getLatched(Pointer target)
|
|
{
|
|
return getLatched(target.key, target.value);
|
|
}
|
|
|
|
private Pointer getLatched(KeyboardData.Key k, KeyValue v)
|
|
{
|
|
if (v == null)
|
|
return null;
|
|
for (Pointer p : _ptrs)
|
|
if (p.key == k && p.hasFlagsAny(FLAG_P_LATCHED)
|
|
&& p.value != null && p.value.equals(v))
|
|
return p;
|
|
return null;
|
|
}
|
|
|
|
private void clearLatched()
|
|
{
|
|
for (int i = _ptrs.size() - 1; i >= 0; i--)
|
|
{
|
|
Pointer ptr = _ptrs.get(i);
|
|
// Latched and not locked, remove
|
|
if (ptr.hasFlagsAny(FLAG_P_LATCHED) && (ptr.flags & FLAG_P_LOCKED) == 0)
|
|
_ptrs.remove(i);
|
|
// Not latched but pressed, don't latch once released and stop long press.
|
|
else if ((ptr.flags & FLAG_P_LATCHABLE) != 0)
|
|
ptr.flags &= ~FLAG_P_LATCHABLE;
|
|
}
|
|
}
|
|
|
|
/** Make a pointer into the locked state. */
|
|
private void lockPointer(Pointer ptr, boolean shouldVibrate)
|
|
{
|
|
ptr.flags = (ptr.flags & ~FLAG_P_DOUBLE_TAP_LOCK) | FLAG_P_LOCKED;
|
|
_handler.onPointerFlagsChanged(shouldVibrate);
|
|
}
|
|
|
|
boolean isSliding()
|
|
{
|
|
for (Pointer ptr : _ptrs)
|
|
if (ptr.hasFlagsAny(FLAG_P_SLIDING))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Key repeat
|
|
|
|
/** Message from [_longpress_handler]. */
|
|
@Override
|
|
public boolean handleMessage(Message msg)
|
|
{
|
|
for (Pointer ptr : _ptrs)
|
|
{
|
|
if (ptr.timeoutWhat == msg.what)
|
|
{
|
|
handleLongPress(ptr);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private static int uniqueTimeoutWhat = 0;
|
|
|
|
private void startLongPress(Pointer ptr)
|
|
{
|
|
int what = (uniqueTimeoutWhat++);
|
|
ptr.timeoutWhat = what;
|
|
_longpress_handler.sendEmptyMessageDelayed(what, _config.longPressTimeout);
|
|
}
|
|
|
|
private void stopLongPress(Pointer ptr)
|
|
{
|
|
_longpress_handler.removeMessages(ptr.timeoutWhat);
|
|
}
|
|
|
|
private void restartLongPress(Pointer ptr)
|
|
{
|
|
stopLongPress(ptr);
|
|
startLongPress(ptr);
|
|
}
|
|
|
|
/** A pointer is long pressing. */
|
|
private void handleLongPress(Pointer ptr)
|
|
{
|
|
// Long press toggle lock on modifiers
|
|
if ((ptr.flags & FLAG_P_LATCHABLE) != 0)
|
|
{
|
|
if (!ptr.hasFlagsAny(FLAG_P_CANT_LOCK))
|
|
lockPointer(ptr, true);
|
|
return;
|
|
}
|
|
// Latched key, no key
|
|
if (ptr.hasFlagsAny(FLAG_P_LATCHED) || ptr.value == null)
|
|
return;
|
|
// Key is long-pressable
|
|
KeyValue kv = KeyModifier.modify_long_press(ptr.value);
|
|
if (!kv.equals(ptr.value))
|
|
{
|
|
ptr.value = kv;
|
|
_handler.onPointerDown(kv, true);
|
|
return;
|
|
}
|
|
// Special keys
|
|
if (kv.hasFlagsAny(KeyValue.FLAG_SPECIAL))
|
|
return;
|
|
// For every other keys, key-repeat
|
|
if (_config.keyrepeat_enabled)
|
|
{
|
|
_handler.onPointerHold(kv, ptr.modifiers);
|
|
_longpress_handler.sendEmptyMessageDelayed(ptr.timeoutWhat,
|
|
_config.longPressInterval);
|
|
}
|
|
}
|
|
|
|
// Sliding
|
|
|
|
void startSliding(Pointer ptr, float x)
|
|
{
|
|
stopLongPress(ptr);
|
|
ptr.flags |= FLAG_P_SLIDING;
|
|
ptr.sliding = new Sliding(x);
|
|
}
|
|
|
|
/** Return the [FLAG_P_*] flags that correspond to pressing [kv]. */
|
|
int pointer_flags_of_kv(KeyValue kv)
|
|
{
|
|
int flags = 0;
|
|
if (kv.hasFlagsAny(KeyValue.FLAG_LATCH))
|
|
{
|
|
// Non-special latchable key must clear modifiers and can't be locked
|
|
if (!kv.hasFlagsAny(KeyValue.FLAG_SPECIAL))
|
|
flags |= FLAG_P_CLEAR_LATCHED | FLAG_P_CANT_LOCK;
|
|
flags |= FLAG_P_LATCHABLE;
|
|
}
|
|
if (_config.double_tap_lock_shift &&
|
|
kv.hasFlagsAny(KeyValue.FLAG_DOUBLE_TAP_LOCK))
|
|
flags |= FLAG_P_DOUBLE_TAP_LOCK;
|
|
return flags;
|
|
}
|
|
|
|
// Gestures
|
|
|
|
/** Apply a gesture to the current key. */
|
|
KeyValue apply_gesture(Pointer ptr, Gesture.Name gesture)
|
|
{
|
|
switch (gesture)
|
|
{
|
|
case None:
|
|
return ptr.value;
|
|
case Swipe:
|
|
return ptr.value;
|
|
case Roundtrip:
|
|
return
|
|
modify_key_with_extra_modifier(
|
|
ptr,
|
|
getNearestKeyAtDirection(ptr, ptr.gesture.current_direction()),
|
|
KeyValue.Modifier.GESTURE);
|
|
case Circle:
|
|
return
|
|
modify_key_with_extra_modifier(ptr, ptr.key.keys[0],
|
|
KeyValue.Modifier.GESTURE);
|
|
case Anticircle:
|
|
return _handler.modifyKey(ptr.key.anticircle, ptr.modifiers);
|
|
}
|
|
return ptr.value; // Unreachable
|
|
}
|
|
|
|
KeyValue modify_key_with_extra_modifier(Pointer ptr, KeyValue kv,
|
|
KeyValue.Modifier extra_mod)
|
|
{
|
|
return
|
|
_handler.modifyKey(kv,
|
|
ptr.modifiers.with_extra_mod(KeyValue.makeInternalModifier(extra_mod)));
|
|
}
|
|
|
|
// Pointers
|
|
|
|
Pointer make_pointer(int p, KeyboardData.Key k, KeyValue v, float x, float y,
|
|
Modifiers m)
|
|
{
|
|
int flags = (v == null) ? 0 : pointer_flags_of_kv(v);
|
|
return new Pointer(p, k, v, x, y, m, flags);
|
|
}
|
|
|
|
private static final class Pointer
|
|
{
|
|
/** -1 when latched. */
|
|
public int pointerId;
|
|
/** The Key pressed by this Pointer */
|
|
public final KeyboardData.Key key;
|
|
/** Gesture state, see [Gesture]. [null] means the pointer has not moved out of the center region. */
|
|
public Gesture gesture;
|
|
/** Selected value with [modifiers] applied. */
|
|
public KeyValue value;
|
|
public float downX;
|
|
public float downY;
|
|
/** Modifier flags at the time the key was pressed. */
|
|
public Modifiers modifiers;
|
|
/** See [FLAG_P_*] flags. */
|
|
public int flags;
|
|
/** Identify timeout messages. */
|
|
public int timeoutWhat;
|
|
/** [null] when not in sliding mode. */
|
|
public Sliding sliding;
|
|
|
|
public Pointer(int p, KeyboardData.Key k, KeyValue v, float x, float y, Modifiers m, int f)
|
|
{
|
|
pointerId = p;
|
|
key = k;
|
|
gesture = null;
|
|
value = v;
|
|
downX = x;
|
|
downY = y;
|
|
modifiers = m;
|
|
flags = f;
|
|
timeoutWhat = -1;
|
|
sliding = null;
|
|
}
|
|
|
|
public boolean hasFlagsAny(int has)
|
|
{
|
|
return ((flags & has) != 0);
|
|
}
|
|
}
|
|
|
|
public final class Sliding
|
|
{
|
|
/** Accumulated distance since last event. */
|
|
float d = 0.f;
|
|
/** The slider speed changes depending on the pointer speed. */
|
|
float speed = 1.f;
|
|
/** Coordinate of the last move. */
|
|
float last_x;
|
|
/** [System.currentTimeMillis()] at the time of the last move. */
|
|
long last_move_ms;
|
|
|
|
public Sliding(float x)
|
|
{
|
|
last_x = x;
|
|
last_move_ms = System.currentTimeMillis();
|
|
}
|
|
|
|
static final float SPEED_SMOOTHING = 0.7f;
|
|
/** Avoid absurdly large values. */
|
|
static final float SPEED_MAX = 4.f;
|
|
|
|
public void onTouchMove(Pointer ptr, float x)
|
|
{
|
|
d += (x - last_x) * speed / _config.slide_step_px;
|
|
update_speed(x);
|
|
// Send an event when [abs(d)] exceeds [1].
|
|
int d_ = (int)d;
|
|
if (d_ != 0)
|
|
{
|
|
d -= d_;
|
|
int key_index = (d_ < 0) ? 5 : 6;
|
|
ptr.value = _handler.modifyKey(ptr.key.keys[key_index], ptr.modifiers);
|
|
send_key(ptr, Math.abs(d_));
|
|
}
|
|
}
|
|
|
|
/** Handle a sliding pointer going up. Latched modifiers are not
|
|
cleared to allow easy adjustments to the cursors. The pointer is
|
|
cancelled. */
|
|
public void onTouchUp(Pointer ptr)
|
|
{
|
|
removePtr(ptr);
|
|
_handler.onPointerFlagsChanged(false);
|
|
}
|
|
|
|
/** Send the pressed key [n] times. */
|
|
void send_key(Pointer ptr, int n)
|
|
{
|
|
if (ptr.value == null)
|
|
return;
|
|
// Avoid looping if possible to avoid lag while sliding fast
|
|
KeyValue multiplied = multiply_key(ptr.value, n);
|
|
if (multiplied != null)
|
|
_handler.onPointerHold(multiplied, ptr.modifiers);
|
|
else
|
|
for (int i = 0; i < n; i++)
|
|
_handler.onPointerHold(ptr.value, ptr.modifiers);
|
|
}
|
|
|
|
/** Return a key performing the same action as [kv] but [n] times. Returns
|
|
[null] if [kv] cannot be multiplied. */
|
|
KeyValue multiply_key(KeyValue kv, int n)
|
|
{
|
|
switch (kv.getKind())
|
|
{
|
|
case Cursor_move:
|
|
return KeyValue.cursorMoveKey(kv.getCursorMove() * n);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/** [speed] is computed from the elapsed time and distance traveled
|
|
between two move events. Exponential smoothing is used to smooth out
|
|
the noise. Sets [last_move_ms] and [last_x]. */
|
|
void update_speed(float x)
|
|
{
|
|
long now = System.currentTimeMillis();
|
|
float instant_speed = Math.min(SPEED_MAX,
|
|
Math.abs(x - last_x) / (float)(now - last_move_ms) + 1.f);
|
|
speed = speed + (instant_speed - speed) * SPEED_SMOOTHING;
|
|
last_move_ms = now;
|
|
last_x = x;
|
|
}
|
|
}
|
|
|
|
/** Represent modifiers currently activated.
|
|
Sorted in the order they should be evaluated. */
|
|
public static final class Modifiers
|
|
{
|
|
private final KeyValue[] _mods;
|
|
private final int _size;
|
|
|
|
private Modifiers(KeyValue[] m, int s)
|
|
{
|
|
_mods = m; _size = s;
|
|
}
|
|
|
|
public KeyValue get(int i) { return _mods[_size - 1 - i]; }
|
|
public int size() { return _size; }
|
|
public boolean has(KeyValue.Modifier m)
|
|
{
|
|
for (int i = 0; i < _size; i++)
|
|
{
|
|
KeyValue kv = _mods[i];
|
|
switch (kv.getKind())
|
|
{
|
|
case Modifier:
|
|
if (kv.getModifier().equals(m))
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/** Return a copy of this object with an extra modifier added. */
|
|
public Modifiers with_extra_mod(KeyValue m)
|
|
{
|
|
KeyValue[] newmods = Arrays.copyOf(_mods, _size + 1);
|
|
newmods[_size] = m;
|
|
return ofArray(newmods, newmods.length);
|
|
}
|
|
|
|
/** Returns the activated modifiers that are not in [m2]. */
|
|
public Iterator<KeyValue> diff(Modifiers m2)
|
|
{
|
|
return new ModifiersDiffIterator(this, m2);
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() { return Arrays.hashCode(_mods); }
|
|
@Override
|
|
public boolean equals(Object obj)
|
|
{
|
|
return Arrays.equals(_mods, ((Modifiers)obj)._mods);
|
|
}
|
|
|
|
public static final Modifiers EMPTY =
|
|
new Modifiers(new KeyValue[0], 0);
|
|
|
|
protected static Modifiers ofArray(KeyValue[] mods, int size)
|
|
{
|
|
// Sort and remove duplicates and nulls.
|
|
if (size > 1)
|
|
{
|
|
Arrays.sort(mods, 0, size);
|
|
int j = 0;
|
|
for (int i = 0; i < size; i++)
|
|
{
|
|
KeyValue m = mods[i];
|
|
if (m != null && (i + 1 >= size || m != mods[i + 1]))
|
|
{
|
|
mods[j] = m;
|
|
j++;
|
|
}
|
|
}
|
|
size = j;
|
|
}
|
|
return new Modifiers(mods, size);
|
|
}
|
|
|
|
/** Returns modifiers that are in [m1_] but not in [m2_]. */
|
|
static final class ModifiersDiffIterator
|
|
implements Iterator<KeyValue>
|
|
{
|
|
Modifiers m1;
|
|
int i1 = 0;
|
|
Modifiers m2;
|
|
int i2 = 0;
|
|
|
|
public ModifiersDiffIterator(Modifiers m1_, Modifiers m2_)
|
|
{
|
|
m1 = m1_;
|
|
m2 = m2_;
|
|
advance();
|
|
}
|
|
|
|
public boolean hasNext()
|
|
{
|
|
return i1 < m1._size;
|
|
}
|
|
|
|
public KeyValue next()
|
|
{
|
|
if (i1 >= m1._size)
|
|
throw new NoSuchElementException();
|
|
KeyValue m = m1._mods[i1];
|
|
i1++;
|
|
advance();
|
|
return m;
|
|
}
|
|
|
|
/** Advance to the next element if [i1] is not a valid element. The end
|
|
is reached when [i1 = m1.size()]. */
|
|
void advance()
|
|
{
|
|
while (i1 < m1.size())
|
|
{
|
|
KeyValue m = m1._mods[i1];
|
|
while (true)
|
|
{
|
|
if (i2 >= m2._size)
|
|
return;
|
|
int d = m.compareTo(m2._mods[i2]);
|
|
if (d < 0)
|
|
return;
|
|
i2++;
|
|
if (d == 0)
|
|
break;
|
|
}
|
|
i1++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public interface IPointerEventHandler
|
|
{
|
|
/** Key can be modified or removed by returning [null]. */
|
|
public KeyValue modifyKey(KeyValue k, Modifiers mods);
|
|
|
|
/** A key is pressed. [getModifiers()] is uptodate. Might be called after a
|
|
press or a swipe to a different value. Down events are not paired with
|
|
up events. */
|
|
public void onPointerDown(KeyValue k, boolean isSwipe);
|
|
|
|
/** Key is released. [k] is the key that was returned by
|
|
[modifySelectedKey] or [modifySelectedKey]. */
|
|
public void onPointerUp(KeyValue k, Modifiers mods);
|
|
|
|
/** Flags changed because latched or locked keys or cancelled pointers. */
|
|
public void onPointerFlagsChanged(boolean shouldVibrate);
|
|
|
|
/** Key is repeating. */
|
|
public void onPointerHold(KeyValue k, Modifiers mods);
|
|
}
|
|
}
|