The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of 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, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.text; |
| 18 | |
| 19 | import com.android.internal.util.ArrayUtils; |
Adam Lesinski | 776abc2 | 2014-03-07 11:30:59 -0500 | [diff] [blame] | 20 | import com.android.internal.util.GrowingArrayUtils; |
| 21 | |
| 22 | import libcore.util.EmptyArray; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | |
| 24 | class PackedObjectVector<E> |
| 25 | { |
| 26 | private int mColumns; |
| 27 | private int mRows; |
| 28 | |
| 29 | private int mRowGapStart; |
| 30 | private int mRowGapLength; |
| 31 | |
| 32 | private Object[] mValues; |
| 33 | |
| 34 | public |
| 35 | PackedObjectVector(int columns) |
| 36 | { |
| 37 | mColumns = columns; |
Adam Lesinski | 776abc2 | 2014-03-07 11:30:59 -0500 | [diff] [blame] | 38 | mValues = EmptyArray.OBJECT; |
| 39 | mRows = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 40 | |
| 41 | mRowGapStart = 0; |
| 42 | mRowGapLength = mRows; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | public E |
| 46 | getValue(int row, int column) |
| 47 | { |
| 48 | if (row >= mRowGapStart) |
| 49 | row += mRowGapLength; |
| 50 | |
| 51 | Object value = mValues[row * mColumns + column]; |
| 52 | |
| 53 | return (E) value; |
| 54 | } |
| 55 | |
| 56 | public void |
| 57 | setValue(int row, int column, E value) |
| 58 | { |
| 59 | if (row >= mRowGapStart) |
| 60 | row += mRowGapLength; |
| 61 | |
| 62 | mValues[row * mColumns + column] = value; |
| 63 | } |
| 64 | |
| 65 | public void |
| 66 | insertAt(int row, E[] values) |
| 67 | { |
| 68 | moveRowGapTo(row); |
| 69 | |
| 70 | if (mRowGapLength == 0) |
| 71 | growBuffer(); |
| 72 | |
| 73 | mRowGapStart++; |
| 74 | mRowGapLength--; |
| 75 | |
| 76 | if (values == null) |
| 77 | for (int i = 0; i < mColumns; i++) |
| 78 | setValue(row, i, null); |
| 79 | else |
| 80 | for (int i = 0; i < mColumns; i++) |
| 81 | setValue(row, i, values[i]); |
| 82 | } |
| 83 | |
| 84 | public void |
| 85 | deleteAt(int row, int count) |
| 86 | { |
| 87 | moveRowGapTo(row + count); |
| 88 | |
| 89 | mRowGapStart -= count; |
| 90 | mRowGapLength += count; |
| 91 | |
| 92 | if (mRowGapLength > size() * 2) |
| 93 | { |
| 94 | // dump(); |
| 95 | // growBuffer(); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | public int |
| 100 | size() |
| 101 | { |
| 102 | return mRows - mRowGapLength; |
| 103 | } |
| 104 | |
| 105 | public int |
| 106 | width() |
| 107 | { |
| 108 | return mColumns; |
| 109 | } |
| 110 | |
| 111 | private void |
| 112 | growBuffer() |
| 113 | { |
Adam Lesinski | 776abc2 | 2014-03-07 11:30:59 -0500 | [diff] [blame] | 114 | Object[] newvalues = ArrayUtils.newUnpaddedObjectArray( |
| 115 | GrowingArrayUtils.growSize(size()) * mColumns); |
| 116 | int newsize = newvalues.length / mColumns; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 117 | int after = mRows - (mRowGapStart + mRowGapLength); |
| 118 | |
| 119 | System.arraycopy(mValues, 0, newvalues, 0, mColumns * mRowGapStart); |
| 120 | System.arraycopy(mValues, (mRows - after) * mColumns, newvalues, (newsize - after) * mColumns, after * mColumns); |
| 121 | |
| 122 | mRowGapLength += newsize - mRows; |
| 123 | mRows = newsize; |
| 124 | mValues = newvalues; |
| 125 | } |
| 126 | |
| 127 | private void |
| 128 | moveRowGapTo(int where) |
| 129 | { |
| 130 | if (where == mRowGapStart) |
| 131 | return; |
| 132 | |
| 133 | if (where > mRowGapStart) |
| 134 | { |
| 135 | int moving = where + mRowGapLength - (mRowGapStart + mRowGapLength); |
| 136 | |
| 137 | for (int i = mRowGapStart + mRowGapLength; i < mRowGapStart + mRowGapLength + moving; i++) |
| 138 | { |
| 139 | int destrow = i - (mRowGapStart + mRowGapLength) + mRowGapStart; |
| 140 | |
| 141 | for (int j = 0; j < mColumns; j++) |
| 142 | { |
| 143 | Object val = mValues[i * mColumns + j]; |
| 144 | |
| 145 | mValues[destrow * mColumns + j] = val; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | else /* where < mRowGapStart */ |
| 150 | { |
| 151 | int moving = mRowGapStart - where; |
| 152 | |
| 153 | for (int i = where + moving - 1; i >= where; i--) |
| 154 | { |
| 155 | int destrow = i - where + mRowGapStart + mRowGapLength - moving; |
| 156 | |
| 157 | for (int j = 0; j < mColumns; j++) |
| 158 | { |
| 159 | Object val = mValues[i * mColumns + j]; |
| 160 | |
| 161 | mValues[destrow * mColumns + j] = val; |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | mRowGapStart = where; |
| 167 | } |
| 168 | |
| 169 | public void // XXX |
| 170 | dump() |
| 171 | { |
| 172 | for (int i = 0; i < mRows; i++) |
| 173 | { |
| 174 | for (int j = 0; j < mColumns; j++) |
| 175 | { |
| 176 | Object val = mValues[i * mColumns + j]; |
| 177 | |
| 178 | if (i < mRowGapStart || i >= mRowGapStart + mRowGapLength) |
| 179 | System.out.print(val + " "); |
| 180 | else |
| 181 | System.out.print("(" + val + ") "); |
| 182 | } |
| 183 | |
| 184 | System.out.print(" << \n"); |
| 185 | } |
| 186 | |
| 187 | System.out.print("-----\n\n"); |
| 188 | } |
| 189 | } |