1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.keyboard.internal;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import com.android.inputmethod.keyboard.Key;
import com.android.inputmethod.latin.utils.CoordinateUtils;
import com.android.inputmethod.latin.utils.ViewLayoutUtils;
import java.util.ArrayDeque;
import java.util.HashMap;
import java.util.HashSet;
/**
* This class controls pop up key previews. This class decides:
* - what kind of key previews should be shown.
* - where key previews should be placed.
* - how key previews should be shown and dismissed.
*/
public final class KeyPreviewChoreographer {
// Free {@link KeyPreviewView} pool that can be used for key preview.
private final ArrayDeque<KeyPreviewView> mFreeKeyPreviewViews = new ArrayDeque<>();
// Map from {@link Key} to {@link KeyPreviewView} that is currently being displayed as key
// preview.
private final HashMap<Key,KeyPreviewView> mShowingKeyPreviewViews = new HashMap<>();
private final KeyPreviewDrawParams mParams;
public KeyPreviewChoreographer(final KeyPreviewDrawParams params) {
mParams = params;
}
public KeyPreviewView getKeyPreviewView(final Key key, final ViewGroup placerView) {
KeyPreviewView keyPreviewView = mShowingKeyPreviewViews.remove(key);
if (keyPreviewView != null) {
return keyPreviewView;
}
keyPreviewView = mFreeKeyPreviewViews.poll();
if (keyPreviewView != null) {
return keyPreviewView;
}
final Context context = placerView.getContext();
keyPreviewView = new KeyPreviewView(context, null /* attrs */);
keyPreviewView.setBackgroundResource(mParams.mPreviewBackgroundResId);
placerView.addView(keyPreviewView, ViewLayoutUtils.newLayoutParam(placerView, 0, 0));
return keyPreviewView;
}
public boolean isShowingKeyPreview(final Key key) {
return mShowingKeyPreviewViews.containsKey(key);
}
public void dismissAllKeyPreviews() {
for (final Key key : new HashSet<>(mShowingKeyPreviewViews.keySet())) {
dismissKeyPreview(key, false /* withAnimation */);
}
}
public void dismissKeyPreview(final Key key, final boolean withAnimation) {
if (key == null) {
return;
}
final KeyPreviewView keyPreviewView = mShowingKeyPreviewViews.get(key);
if (keyPreviewView == null) {
return;
}
final Object tag = keyPreviewView.getTag();
if (withAnimation) {
if (tag instanceof KeyPreviewAnimators) {
final KeyPreviewAnimators animators = (KeyPreviewAnimators)tag;
animators.startDismiss();
return;
}
}
// Dismiss preview without animation.
mShowingKeyPreviewViews.remove(key);
if (tag instanceof Animator) {
((Animator)tag).cancel();
}
keyPreviewView.setTag(null);
keyPreviewView.setVisibility(View.INVISIBLE);
mFreeKeyPreviewViews.add(keyPreviewView);
}
public void placeAndShowKeyPreview(final Key key, final KeyboardIconsSet iconsSet,
final KeyDrawParams drawParams, final int keyboardViewWidth, final int[] keyboardOrigin,
final ViewGroup placerView, final boolean withAnimation) {
final KeyPreviewView keyPreviewView = getKeyPreviewView(key, placerView);
placeKeyPreview(
key, keyPreviewView, iconsSet, drawParams, keyboardViewWidth, keyboardOrigin);
showKeyPreview(key, keyPreviewView, withAnimation);
}
private void placeKeyPreview(final Key key, final KeyPreviewView keyPreviewView,
final KeyboardIconsSet iconsSet, final KeyDrawParams drawParams,
final int keyboardViewWidth, final int[] originCoords) {
keyPreviewView.setPreviewVisual(key, iconsSet, drawParams);
keyPreviewView.measure(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
mParams.setGeometry(keyPreviewView);
final int previewWidth = keyPreviewView.getMeasuredWidth();
final int previewHeight = mParams.mPreviewHeight;
final int keyDrawWidth = key.getDrawWidth();
// The key preview is horizontally aligned with the center of the visible part of the
// parent key. If it doesn't fit in this {@link KeyboardView}, it is moved inward to fit and
// the left/right background is used if such background is specified.
final int keyPreviewPosition;
int previewX = key.getDrawX() - (previewWidth - keyDrawWidth) / 2
+ CoordinateUtils.x(originCoords);
if (previewX < 0) {
previewX = 0;
keyPreviewPosition = KeyPreviewView.POSITION_LEFT;
} else if (previewX > keyboardViewWidth - previewWidth) {
previewX = keyboardViewWidth - previewWidth;
keyPreviewPosition = KeyPreviewView.POSITION_RIGHT;
} else {
keyPreviewPosition = KeyPreviewView.POSITION_MIDDLE;
}
final boolean hasMoreKeys = (key.getMoreKeys() != null);
keyPreviewView.setPreviewBackground(hasMoreKeys, keyPreviewPosition);
// The key preview is placed vertically above the top edge of the parent key with an
// arbitrary offset.
final int previewY = key.getY() - previewHeight + mParams.mPreviewOffset
+ CoordinateUtils.y(originCoords);
ViewLayoutUtils.placeViewAt(
keyPreviewView, previewX, previewY, previewWidth, previewHeight);
keyPreviewView.setPivotX(previewWidth / 2.0f);
keyPreviewView.setPivotY(previewHeight);
}
private void showKeyPreview(final Key key, final KeyPreviewView keyPreviewView,
final boolean withAnimation) {
if (!withAnimation) {
keyPreviewView.setVisibility(View.VISIBLE);
mShowingKeyPreviewViews.put(key, keyPreviewView);
return;
}
// Show preview with animation.
final Animator showUpAnimator = createShowUpAnimator(key, keyPreviewView);
final Animator dismissAnimator = createDismissAnimator(key, keyPreviewView);
final KeyPreviewAnimators animators = new KeyPreviewAnimators(
showUpAnimator, dismissAnimator);
keyPreviewView.setTag(animators);
animators.startShowUp();
}
public Animator createShowUpAnimator(final Key key, final KeyPreviewView keyPreviewView) {
final Animator animator = mParams.createShowUpAnimator(keyPreviewView);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(final Animator animator) {
showKeyPreview(key, keyPreviewView, false /* withAnimation */);
}
});
return animator;
}
private Animator createDismissAnimator(final Key key, final KeyPreviewView keyPreviewView) {
final Animator animator = mParams.createDismissAnimator(keyPreviewView);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(final Animator animator) {
dismissKeyPreview(key, false /* withAnimation */);
}
});
return animator;
}
private static class KeyPreviewAnimators extends AnimatorListenerAdapter {
private final Animator mShowUpAnimator;
private final Animator mDismissAnimator;
public KeyPreviewAnimators(final Animator showUpAnimator, final Animator dismissAnimator) {
mShowUpAnimator = showUpAnimator;
mDismissAnimator = dismissAnimator;
}
public void startShowUp() {
mShowUpAnimator.start();
}
public void startDismiss() {
if (mShowUpAnimator.isRunning()) {
mShowUpAnimator.addListener(this);
return;
}
mDismissAnimator.start();
}
@Override
public void onAnimationEnd(final Animator animator) {
mDismissAnimator.start();
}
}
}
|
