The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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.style; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.res.ColorStateList; |
| 21 | import android.content.res.TypedArray; |
| 22 | import android.graphics.Typeface; |
| 23 | import android.os.Parcel; |
| 24 | import android.text.ParcelableSpan; |
| 25 | import android.text.TextPaint; |
| 26 | import android.text.TextUtils; |
| 27 | |
| 28 | /** |
| 29 | * Sets the text color, size, style, and typeface to match a TextAppearance |
| 30 | * resource. |
| 31 | */ |
| 32 | public class TextAppearanceSpan extends MetricAffectingSpan implements ParcelableSpan { |
| 33 | private final String mTypeface; |
| 34 | private final int mStyle; |
| 35 | private final int mTextSize; |
| 36 | private final ColorStateList mTextColor; |
| 37 | private final ColorStateList mTextColorLink; |
| 38 | |
| 39 | /** |
| 40 | * Uses the specified TextAppearance resource to determine the |
| 41 | * text appearance. The <code>appearance</code> should be, for example, |
| 42 | * <code>android.R.style.TextAppearance_Small</code>. |
| 43 | */ |
| 44 | public TextAppearanceSpan(Context context, int appearance) { |
| 45 | this(context, appearance, -1); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Uses the specified TextAppearance resource to determine the |
| 50 | * text appearance, and the specified text color resource |
| 51 | * to determine the color. The <code>appearance</code> should be, |
| 52 | * for example, <code>android.R.style.TextAppearance_Small</code>, |
| 53 | * and the <code>colorList</code> should be, for example, |
| 54 | * <code>android.R.styleable.Theme_textColorDim</code>. |
| 55 | */ |
| 56 | public TextAppearanceSpan(Context context, int appearance, |
| 57 | int colorList) { |
| 58 | ColorStateList textColor; |
| 59 | |
| 60 | TypedArray a = |
| 61 | context.obtainStyledAttributes(appearance, |
| 62 | com.android.internal.R.styleable.TextAppearance); |
| 63 | |
| 64 | textColor = a.getColorStateList(com.android.internal.R.styleable. |
| 65 | TextAppearance_textColor); |
| 66 | mTextColorLink = a.getColorStateList(com.android.internal.R.styleable. |
| 67 | TextAppearance_textColorLink); |
| 68 | mTextSize = a.getDimensionPixelSize(com.android.internal.R.styleable. |
| 69 | TextAppearance_textSize, -1); |
| 70 | |
| 71 | mStyle = a.getInt(com.android.internal.R.styleable.TextAppearance_textStyle, 0); |
| 72 | int tf = a.getInt(com.android.internal.R.styleable.TextAppearance_typeface, 0); |
| 73 | |
| 74 | switch (tf) { |
| 75 | case 1: |
| 76 | mTypeface = "sans"; |
| 77 | break; |
| 78 | |
| 79 | case 2: |
| 80 | mTypeface = "serif"; |
| 81 | break; |
| 82 | |
| 83 | case 3: |
| 84 | mTypeface = "monospace"; |
| 85 | break; |
| 86 | |
| 87 | default: |
| 88 | mTypeface = null; |
| 89 | break; |
| 90 | } |
| 91 | |
| 92 | a.recycle(); |
| 93 | |
| 94 | if (colorList >= 0) { |
| 95 | a = context.obtainStyledAttributes(com.android.internal.R.style.Theme, |
| 96 | com.android.internal.R.styleable.Theme); |
| 97 | |
| 98 | textColor = a.getColorStateList(colorList); |
| 99 | a.recycle(); |
| 100 | } |
| 101 | |
| 102 | mTextColor = textColor; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Makes text be drawn with the specified typeface, size, style, |
| 107 | * and colors. |
| 108 | */ |
| 109 | public TextAppearanceSpan(String family, int style, int size, |
| 110 | ColorStateList color, ColorStateList linkColor) { |
| 111 | mTypeface = family; |
| 112 | mStyle = style; |
| 113 | mTextSize = size; |
| 114 | mTextColor = color; |
| 115 | mTextColorLink = linkColor; |
| 116 | } |
| 117 | |
| 118 | public TextAppearanceSpan(Parcel src) { |
| 119 | mTypeface = src.readString(); |
| 120 | mStyle = src.readInt(); |
| 121 | mTextSize = src.readInt(); |
| 122 | if (src.readInt() != 0) { |
| 123 | mTextColor = ColorStateList.CREATOR.createFromParcel(src); |
| 124 | } else { |
| 125 | mTextColor = null; |
| 126 | } |
| 127 | if (src.readInt() != 0) { |
| 128 | mTextColorLink = ColorStateList.CREATOR.createFromParcel(src); |
| 129 | } else { |
| 130 | mTextColorLink = null; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | public int getSpanTypeId() { |
| 135 | return TextUtils.TEXT_APPEARANCE_SPAN; |
| 136 | } |
| 137 | |
| 138 | public int describeContents() { |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | public void writeToParcel(Parcel dest, int flags) { |
| 143 | dest.writeString(mTypeface); |
| 144 | dest.writeInt(mStyle); |
| 145 | dest.writeInt(mTextSize); |
| 146 | if (mTextColor != null) { |
| 147 | dest.writeInt(1); |
| 148 | mTextColor.writeToParcel(dest, flags); |
| 149 | } else { |
| 150 | dest.writeInt(0); |
| 151 | } |
| 152 | if (mTextColorLink != null) { |
| 153 | dest.writeInt(1); |
| 154 | mTextColorLink.writeToParcel(dest, flags); |
| 155 | } else { |
| 156 | dest.writeInt(0); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Returns the typeface family specified by this span, or <code>null</code> |
| 162 | * if it does not specify one. |
| 163 | */ |
| 164 | public String getFamily() { |
| 165 | return mTypeface; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Returns the text color specified by this span, or <code>null</code> |
| 170 | * if it does not specify one. |
| 171 | */ |
| 172 | public ColorStateList getTextColor() { |
| 173 | return mTextColor; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Returns the link color specified by this span, or <code>null</code> |
| 178 | * if it does not specify one. |
| 179 | */ |
| 180 | public ColorStateList getLinkTextColor() { |
| 181 | return mTextColorLink; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Returns the text size specified by this span, or <code>-1</code> |
| 186 | * if it does not specify one. |
| 187 | */ |
| 188 | public int getTextSize() { |
| 189 | return mTextSize; |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Returns the text style specified by this span, or <code>0</code> |
| 194 | * if it does not specify one. |
| 195 | */ |
| 196 | public int getTextStyle() { |
| 197 | return mStyle; |
| 198 | } |
| 199 | |
| 200 | @Override |
| 201 | public void updateDrawState(TextPaint ds) { |
| 202 | updateMeasureState(ds); |
| 203 | |
| 204 | if (mTextColor != null) { |
| 205 | ds.setColor(mTextColor.getColorForState(ds.drawableState, 0)); |
| 206 | } |
| 207 | |
| 208 | if (mTextColorLink != null) { |
| 209 | ds.linkColor = mTextColor.getColorForState(ds.drawableState, 0); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | @Override |
| 214 | public void updateMeasureState(TextPaint ds) { |
| 215 | if (mTypeface != null || mStyle != 0) { |
| 216 | Typeface tf = ds.getTypeface(); |
| 217 | int style = 0; |
| 218 | |
| 219 | if (tf != null) { |
| 220 | style = tf.getStyle(); |
| 221 | } |
| 222 | |
| 223 | style |= mStyle; |
| 224 | |
| 225 | if (mTypeface != null) { |
| 226 | tf = Typeface.create(mTypeface, style); |
| 227 | } else if (tf == null) { |
| 228 | tf = Typeface.defaultFromStyle(style); |
| 229 | } else { |
| 230 | tf = Typeface.create(tf, style); |
| 231 | } |
| 232 | |
| 233 | int fake = style & ~tf.getStyle(); |
| 234 | |
| 235 | if ((fake & Typeface.BOLD) != 0) { |
| 236 | ds.setFakeBoldText(true); |
| 237 | } |
| 238 | |
| 239 | if ((fake & Typeface.ITALIC) != 0) { |
| 240 | ds.setTextSkewX(-0.25f); |
| 241 | } |
| 242 | |
| 243 | ds.setTypeface(tf); |
| 244 | } |
| 245 | |
| 246 | if (mTextSize > 0) { |
| 247 | ds.setTextSize(mTextSize); |
| 248 | } |
| 249 | } |
| 250 | } |