PointerTrackerQueue.java revision 5c73ed628b22fdfa59585803ee86e383c579a7d4 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package com.android.inputmethod.keyboard.internal;
18
19import com.android.inputmethod.keyboard.PointerTracker;
20
21import java.util.LinkedList;
22
23public class PointerTrackerQueue {
24    private LinkedList<PointerTracker> mQueue = new LinkedList<PointerTracker>();
25
26    public void add(PointerTracker tracker) {
27        mQueue.add(tracker);
28    }
29
30    public void releaseAllPointersOlderThan(PointerTracker tracker, long eventTime) {
31        if (mQueue.lastIndexOf(tracker) < 0) {
32            return;
33        }
34        final LinkedList<PointerTracker> queue = mQueue;
35        int oldestPos = 0;
36        for (PointerTracker t = queue.get(oldestPos); t != tracker; t = queue.get(oldestPos)) {
37            if (t.isModifier()) {
38                oldestPos++;
39            } else {
40                t.onPhantomUpEvent(t.getLastX(), t.getLastY(), eventTime, true);
41                queue.remove(oldestPos);
42            }
43        }
44    }
45
46    public void releaseAllPointers(long eventTime) {
47        releaseAllPointersExcept(null, eventTime, true);
48    }
49
50    public void releaseAllPointersExcept(PointerTracker tracker, long eventTime,
51            boolean updateReleasedKeyGraphics) {
52        for (PointerTracker t : mQueue) {
53            if (t == tracker)
54                continue;
55            t.onPhantomUpEvent(t.getLastX(), t.getLastY(), eventTime, updateReleasedKeyGraphics);
56        }
57        mQueue.clear();
58        if (tracker != null)
59            mQueue.add(tracker);
60    }
61
62    public void remove(PointerTracker tracker) {
63        mQueue.remove(tracker);
64    }
65
66    public boolean isAnyInSlidingKeyInput() {
67        for (final PointerTracker tracker : mQueue) {
68            if (tracker.isInSlidingKeyInput())
69                return true;
70        }
71        return false;
72    }
73
74    @Override
75    public String toString() {
76        StringBuilder sb = new StringBuilder("[");
77        for (PointerTracker tracker : mQueue) {
78            if (sb.length() > 1)
79                sb.append(" ");
80            sb.append(String.format("%d", tracker.mPointerId));
81        }
82        sb.append("]");
83        return sb.toString();
84    }
85}
86