1 /* 2 * Copyright (C) 2011 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.view; 18 19 import android.annotation.NonNull; 20 import android.annotation.XmlRes; 21 import android.content.Context; 22 import android.content.res.Resources; 23 import android.content.res.TypedArray; 24 import android.content.res.XmlResourceParser; 25 import android.graphics.Bitmap; 26 import android.graphics.Canvas; 27 import android.graphics.Paint; 28 import android.graphics.Rect; 29 import android.graphics.RectF; 30 import android.graphics.drawable.AnimationDrawable; 31 import android.graphics.drawable.BitmapDrawable; 32 import android.graphics.drawable.Drawable; 33 import android.os.Parcel; 34 import android.os.Parcelable; 35 import android.util.Log; 36 import android.util.SparseArray; 37 38 import com.android.internal.util.XmlUtils; 39 40 /** 41 * Represents an icon that can be used as a mouse pointer. 42 * <p> 43 * Pointer icons can be provided either by the system using system types, 44 * or by applications using bitmaps or application resources. 45 * </p> 46 */ 47 public final class PointerIcon implements Parcelable { 48 private static final String TAG = "PointerIcon"; 49 50 /** {@hide} Type constant: Custom icon with a user-supplied bitmap. */ 51 public static final int TYPE_CUSTOM = -1; 52 53 /** Type constant: Null icon. It has no bitmap. */ 54 public static final int TYPE_NULL = 0; 55 56 /** Type constant: no icons are specified. If all views uses this, then falls back 57 * to the default type, but this is helpful to distinguish a view explicitly want 58 * to have the default icon. 59 * @hide 60 */ 61 public static final int TYPE_NOT_SPECIFIED = 1; 62 63 /** Type constant: Arrow icon. (Default mouse pointer) */ 64 public static final int TYPE_ARROW = 1000; 65 66 /** {@hide} Type constant: Spot hover icon for touchpads. */ 67 public static final int TYPE_SPOT_HOVER = 2000; 68 69 /** {@hide} Type constant: Spot touch icon for touchpads. */ 70 public static final int TYPE_SPOT_TOUCH = 2001; 71 72 /** {@hide} Type constant: Spot anchor icon for touchpads. */ 73 public static final int TYPE_SPOT_ANCHOR = 2002; 74 75 // Type constants for additional predefined icons for mice. 76 /** Type constant: context-menu. */ 77 public static final int TYPE_CONTEXT_MENU = 1001; 78 79 /** Type constant: hand. */ 80 public static final int TYPE_HAND = 1002; 81 82 /** Type constant: help. */ 83 public static final int TYPE_HELP = 1003; 84 85 /** Type constant: wait. */ 86 public static final int TYPE_WAIT = 1004; 87 88 /** Type constant: cell. */ 89 public static final int TYPE_CELL = 1006; 90 91 /** Type constant: crosshair. */ 92 public static final int TYPE_CROSSHAIR = 1007; 93 94 /** Type constant: text. */ 95 public static final int TYPE_TEXT = 1008; 96 97 /** Type constant: vertical-text. */ 98 public static final int TYPE_VERTICAL_TEXT = 1009; 99 100 /** Type constant: alias (indicating an alias of/shortcut to something is 101 * to be created. */ 102 public static final int TYPE_ALIAS = 1010; 103 104 /** Type constant: copy. */ 105 public static final int TYPE_COPY = 1011; 106 107 /** Type constant: no-drop. */ 108 public static final int TYPE_NO_DROP = 1012; 109 110 /** Type constant: all-scroll. */ 111 public static final int TYPE_ALL_SCROLL = 1013; 112 113 /** Type constant: horizontal double arrow mainly for resizing. */ 114 public static final int TYPE_HORIZONTAL_DOUBLE_ARROW = 1014; 115 116 /** Type constant: vertical double arrow mainly for resizing. */ 117 public static final int TYPE_VERTICAL_DOUBLE_ARROW = 1015; 118 119 /** Type constant: diagonal double arrow -- top-right to bottom-left. */ 120 public static final int TYPE_TOP_RIGHT_DIAGONAL_DOUBLE_ARROW = 1016; 121 122 /** Type constant: diagonal double arrow -- top-left to bottom-right. */ 123 public static final int TYPE_TOP_LEFT_DIAGONAL_DOUBLE_ARROW = 1017; 124 125 /** Type constant: zoom-in. */ 126 public static final int TYPE_ZOOM_IN = 1018; 127 128 /** Type constant: zoom-out. */ 129 public static final int TYPE_ZOOM_OUT = 1019; 130 131 /** Type constant: grab. */ 132 public static final int TYPE_GRAB = 1020; 133 134 /** Type constant: grabbing. */ 135 public static final int TYPE_GRABBING = 1021; 136 137 // OEM private types should be defined starting at this range to avoid 138 // conflicts with any system types that may be defined in the future. 139 private static final int TYPE_OEM_FIRST = 10000; 140 141 /** The default pointer icon. */ 142 public static final int TYPE_DEFAULT = TYPE_ARROW; 143 144 private static final PointerIcon gNullIcon = new PointerIcon(TYPE_NULL); 145 private static final SparseArray<PointerIcon> gSystemIcons = new SparseArray<PointerIcon>(); 146 private static boolean sUseLargeIcons = false; 147 148 private final int mType; 149 private int mSystemIconResourceId; 150 private Bitmap mBitmap; 151 private float mHotSpotX; 152 private float mHotSpotY; 153 // The bitmaps for the additional frame of animated pointer icon. Note that the first frame 154 // will be stored in mBitmap. 155 private Bitmap mBitmapFrames[]; 156 private int mDurationPerFrame; 157 158 private PointerIcon(int type) { 159 mType = type; 160 } 161 162 /** 163 * Gets a special pointer icon that has no bitmap. 164 * 165 * @return The null pointer icon. 166 * 167 * @see #TYPE_NULL 168 * @hide 169 */ 170 public static PointerIcon getNullIcon() { 171 return gNullIcon; 172 } 173 174 /** 175 * Gets the default pointer icon. 176 * 177 * @param context The context. 178 * @return The default pointer icon. 179 * 180 * @throws IllegalArgumentException if context is null. 181 * @hide 182 */ 183 public static PointerIcon getDefaultIcon(@NonNull Context context) { 184 return getSystemIcon(context, TYPE_DEFAULT); 185 } 186 187 /** 188 * Gets a system pointer icon for the given type. 189 * If typeis not recognized, returns the default pointer icon. 190 * 191 * @param context The context. 192 * @param type The pointer icon type. 193 * @return The pointer icon. 194 * 195 * @throws IllegalArgumentException if context is null. 196 */ 197 public static PointerIcon getSystemIcon(@NonNull Context context, int type) { 198 if (context == null) { 199 throw new IllegalArgumentException("context must not be null"); 200 } 201 202 if (type == TYPE_NULL) { 203 return gNullIcon; 204 } 205 206 PointerIcon icon = gSystemIcons.get(type); 207 if (icon != null) { 208 return icon; 209 } 210 211 int typeIndex = getSystemIconTypeIndex(type); 212 if (typeIndex == 0) { 213 typeIndex = getSystemIconTypeIndex(TYPE_DEFAULT); 214 } 215 216 int defStyle = sUseLargeIcons ? 217 com.android.internal.R.style.LargePointer : com.android.internal.R.style.Pointer; 218 TypedArray a = context.obtainStyledAttributes(null, 219 com.android.internal.R.styleable.Pointer, 220 0, defStyle); 221 int resourceId = a.getResourceId(typeIndex, -1); 222 a.recycle(); 223 224 if (resourceId == -1) { 225 Log.w(TAG, "Missing theme resources for pointer icon type " + type); 226 return type == TYPE_DEFAULT ? gNullIcon : getSystemIcon(context, TYPE_DEFAULT); 227 } 228 229 icon = new PointerIcon(type); 230 if ((resourceId & 0xff000000) == 0x01000000) { 231 icon.mSystemIconResourceId = resourceId; 232 } else { 233 icon.loadResource(context, context.getResources(), resourceId); 234 } 235 gSystemIcons.append(type, icon); 236 return icon; 237 } 238 239 /** 240 * Updates wheter accessibility large icons are used or not. 241 * @hide 242 */ 243 public static void setUseLargeIcons(boolean use) { 244 sUseLargeIcons = use; 245 gSystemIcons.clear(); 246 } 247 248 /** 249 * Creates a custom pointer icon from the given bitmap and hotspot information. 250 * 251 * @param bitmap The bitmap for the icon. 252 * @param hotSpotX The X offset of the pointer icon hotspot in the bitmap. 253 * Must be within the [0, bitmap.getWidth()) range. 254 * @param hotSpotY The Y offset of the pointer icon hotspot in the bitmap. 255 * Must be within the [0, bitmap.getHeight()) range. 256 * @return A pointer icon for this bitmap. 257 * 258 * @throws IllegalArgumentException if bitmap is null, or if the x/y hotspot 259 * parameters are invalid. 260 */ 261 public static PointerIcon create(@NonNull Bitmap bitmap, float hotSpotX, float hotSpotY) { 262 if (bitmap == null) { 263 throw new IllegalArgumentException("bitmap must not be null"); 264 } 265 validateHotSpot(bitmap, hotSpotX, hotSpotY); 266 267 PointerIcon icon = new PointerIcon(TYPE_CUSTOM); 268 icon.mBitmap = bitmap; 269 icon.mHotSpotX = hotSpotX; 270 icon.mHotSpotY = hotSpotY; 271 return icon; 272 } 273 274 /** 275 * Loads a custom pointer icon from an XML resource. 276 * <p> 277 * The XML resource should have the following form: 278 * <code> 279 * <?xml version="1.0" encoding="utf-8"?> 280 * <pointer-icon xmlns:android="http://schemas.android.com/apk/res/android" 281 * android:bitmap="@drawable/my_pointer_bitmap" 282 * android:hotSpotX="24" 283 * android:hotSpotY="24" /> 284 * </code> 285 * </p> 286 * 287 * @param resources The resources object. 288 * @param resourceId The resource id. 289 * @return The pointer icon. 290 * 291 * @throws IllegalArgumentException if resources is null. 292 * @throws Resources.NotFoundException if the resource was not found or the drawable 293 * linked in the resource was not found. 294 */ 295 public static PointerIcon load(@NonNull Resources resources, @XmlRes int resourceId) { 296 if (resources == null) { 297 throw new IllegalArgumentException("resources must not be null"); 298 } 299 300 PointerIcon icon = new PointerIcon(TYPE_CUSTOM); 301 icon.loadResource(null, resources, resourceId); 302 return icon; 303 } 304 305 /** 306 * Loads the bitmap and hotspot information for a pointer icon, if it is not already loaded. 307 * Returns a pointer icon (not necessarily the same instance) with the information filled in. 308 * 309 * @param context The context. 310 * @return The loaded pointer icon. 311 * 312 * @throws IllegalArgumentException if context is null. 313 * @hide 314 */ 315 public PointerIcon load(@NonNull Context context) { 316 if (context == null) { 317 throw new IllegalArgumentException("context must not be null"); 318 } 319 320 if (mSystemIconResourceId == 0 || mBitmap != null) { 321 return this; 322 } 323 324 PointerIcon result = new PointerIcon(mType); 325 result.mSystemIconResourceId = mSystemIconResourceId; 326 result.loadResource(context, context.getResources(), mSystemIconResourceId); 327 return result; 328 } 329 330 /** @hide */ 331 public int getType() { 332 return mType; 333 } 334 335 public static final Parcelable.Creator<PointerIcon> CREATOR 336 = new Parcelable.Creator<PointerIcon>() { 337 public PointerIcon createFromParcel(Parcel in) { 338 int type = in.readInt(); 339 if (type == TYPE_NULL) { 340 return getNullIcon(); 341 } 342 343 int systemIconResourceId = in.readInt(); 344 if (systemIconResourceId != 0) { 345 PointerIcon icon = new PointerIcon(type); 346 icon.mSystemIconResourceId = systemIconResourceId; 347 return icon; 348 } 349 350 Bitmap bitmap = Bitmap.CREATOR.createFromParcel(in); 351 float hotSpotX = in.readFloat(); 352 float hotSpotY = in.readFloat(); 353 return PointerIcon.create(bitmap, hotSpotX, hotSpotY); 354 } 355 356 public PointerIcon[] newArray(int size) { 357 return new PointerIcon[size]; 358 } 359 }; 360 361 public int describeContents() { 362 return 0; 363 } 364 365 public void writeToParcel(Parcel out, int flags) { 366 out.writeInt(mType); 367 368 if (mType != TYPE_NULL) { 369 out.writeInt(mSystemIconResourceId); 370 if (mSystemIconResourceId == 0) { 371 mBitmap.writeToParcel(out, flags); 372 out.writeFloat(mHotSpotX); 373 out.writeFloat(mHotSpotY); 374 } 375 } 376 } 377 378 @Override 379 public boolean equals(Object other) { 380 if (this == other) { 381 return true; 382 } 383 384 if (other == null || !(other instanceof PointerIcon)) { 385 return false; 386 } 387 388 PointerIcon otherIcon = (PointerIcon) other; 389 if (mType != otherIcon.mType 390 || mSystemIconResourceId != otherIcon.mSystemIconResourceId) { 391 return false; 392 } 393 394 if (mSystemIconResourceId == 0 && (mBitmap != otherIcon.mBitmap 395 || mHotSpotX != otherIcon.mHotSpotX 396 || mHotSpotY != otherIcon.mHotSpotY)) { 397 return false; 398 } 399 400 return true; 401 } 402 403 /** 404 * Get the Bitmap from the Drawable. 405 * 406 * If the Bitmap needed to be scaled up to account for density, BitmapDrawable 407 * handles this at draw time. But this class doesn't actually draw the Bitmap; 408 * it is just a holder for native code to access its SkBitmap. So this needs to 409 * get a version that is scaled to account for density. 410 */ 411 private Bitmap getBitmapFromDrawable(BitmapDrawable bitmapDrawable) { 412 Bitmap bitmap = bitmapDrawable.getBitmap(); 413 final int scaledWidth = bitmapDrawable.getIntrinsicWidth(); 414 final int scaledHeight = bitmapDrawable.getIntrinsicHeight(); 415 if (scaledWidth == bitmap.getWidth() && scaledHeight == bitmap.getHeight()) { 416 return bitmap; 417 } 418 419 Rect src = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 420 RectF dst = new RectF(0, 0, scaledWidth, scaledHeight); 421 422 Bitmap scaled = Bitmap.createBitmap(scaledWidth, scaledHeight, bitmap.getConfig()); 423 Canvas canvas = new Canvas(scaled); 424 Paint paint = new Paint(); 425 paint.setFilterBitmap(true); 426 canvas.drawBitmap(bitmap, src, dst, paint); 427 return scaled; 428 } 429 430 private void loadResource(Context context, Resources resources, @XmlRes int resourceId) { 431 final XmlResourceParser parser = resources.getXml(resourceId); 432 final int bitmapRes; 433 final float hotSpotX; 434 final float hotSpotY; 435 try { 436 XmlUtils.beginDocument(parser, "pointer-icon"); 437 438 final TypedArray a = resources.obtainAttributes( 439 parser, com.android.internal.R.styleable.PointerIcon); 440 bitmapRes = a.getResourceId(com.android.internal.R.styleable.PointerIcon_bitmap, 0); 441 hotSpotX = a.getDimension(com.android.internal.R.styleable.PointerIcon_hotSpotX, 0); 442 hotSpotY = a.getDimension(com.android.internal.R.styleable.PointerIcon_hotSpotY, 0); 443 a.recycle(); 444 } catch (Exception ex) { 445 throw new IllegalArgumentException("Exception parsing pointer icon resource.", ex); 446 } finally { 447 parser.close(); 448 } 449 450 if (bitmapRes == 0) { 451 throw new IllegalArgumentException("<pointer-icon> is missing bitmap attribute."); 452 } 453 454 Drawable drawable; 455 if (context == null) { 456 drawable = resources.getDrawable(bitmapRes); 457 } else { 458 drawable = context.getDrawable(bitmapRes); 459 } 460 if (drawable instanceof AnimationDrawable) { 461 // Extract animation frame bitmaps. 462 final AnimationDrawable animationDrawable = (AnimationDrawable) drawable; 463 final int frames = animationDrawable.getNumberOfFrames(); 464 drawable = animationDrawable.getFrame(0); 465 if (frames == 1) { 466 Log.w(TAG, "Animation icon with single frame -- simply treating the first " 467 + "frame as a normal bitmap icon."); 468 } else { 469 // Assumes they have the exact duration. 470 mDurationPerFrame = animationDrawable.getDuration(0); 471 mBitmapFrames = new Bitmap[frames - 1]; 472 final int width = drawable.getIntrinsicWidth(); 473 final int height = drawable.getIntrinsicHeight(); 474 for (int i = 1; i < frames; ++i) { 475 Drawable drawableFrame = animationDrawable.getFrame(i); 476 if (!(drawableFrame instanceof BitmapDrawable)) { 477 throw new IllegalArgumentException("Frame of an animated pointer icon " 478 + "must refer to a bitmap drawable."); 479 } 480 if (drawableFrame.getIntrinsicWidth() != width || 481 drawableFrame.getIntrinsicHeight() != height) { 482 throw new IllegalArgumentException("The bitmap size of " + i + "-th frame " 483 + "is different. All frames should have the exact same size and " 484 + "share the same hotspot."); 485 } 486 BitmapDrawable bitmapDrawableFrame = (BitmapDrawable) drawableFrame; 487 mBitmapFrames[i - 1] = getBitmapFromDrawable(bitmapDrawableFrame); 488 } 489 } 490 } 491 if (!(drawable instanceof BitmapDrawable)) { 492 throw new IllegalArgumentException("<pointer-icon> bitmap attribute must " 493 + "refer to a bitmap drawable."); 494 } 495 496 BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable; 497 final Bitmap bitmap = getBitmapFromDrawable(bitmapDrawable); 498 validateHotSpot(bitmap, hotSpotX, hotSpotY); 499 // Set the properties now that we have successfully loaded the icon. 500 mBitmap = bitmap; 501 mHotSpotX = hotSpotX; 502 mHotSpotY = hotSpotY; 503 } 504 505 private static void validateHotSpot(Bitmap bitmap, float hotSpotX, float hotSpotY) { 506 if (hotSpotX < 0 || hotSpotX >= bitmap.getWidth()) { 507 throw new IllegalArgumentException("x hotspot lies outside of the bitmap area"); 508 } 509 if (hotSpotY < 0 || hotSpotY >= bitmap.getHeight()) { 510 throw new IllegalArgumentException("y hotspot lies outside of the bitmap area"); 511 } 512 } 513 514 private static int getSystemIconTypeIndex(int type) { 515 switch (type) { 516 case TYPE_ARROW: 517 return com.android.internal.R.styleable.Pointer_pointerIconArrow; 518 case TYPE_SPOT_HOVER: 519 return com.android.internal.R.styleable.Pointer_pointerIconSpotHover; 520 case TYPE_SPOT_TOUCH: 521 return com.android.internal.R.styleable.Pointer_pointerIconSpotTouch; 522 case TYPE_SPOT_ANCHOR: 523 return com.android.internal.R.styleable.Pointer_pointerIconSpotAnchor; 524 case TYPE_HAND: 525 return com.android.internal.R.styleable.Pointer_pointerIconHand; 526 case TYPE_CONTEXT_MENU: 527 return com.android.internal.R.styleable.Pointer_pointerIconContextMenu; 528 case TYPE_HELP: 529 return com.android.internal.R.styleable.Pointer_pointerIconHelp; 530 case TYPE_WAIT: 531 return com.android.internal.R.styleable.Pointer_pointerIconWait; 532 case TYPE_CELL: 533 return com.android.internal.R.styleable.Pointer_pointerIconCell; 534 case TYPE_CROSSHAIR: 535 return com.android.internal.R.styleable.Pointer_pointerIconCrosshair; 536 case TYPE_TEXT: 537 return com.android.internal.R.styleable.Pointer_pointerIconText; 538 case TYPE_VERTICAL_TEXT: 539 return com.android.internal.R.styleable.Pointer_pointerIconVerticalText; 540 case TYPE_ALIAS: 541 return com.android.internal.R.styleable.Pointer_pointerIconAlias; 542 case TYPE_COPY: 543 return com.android.internal.R.styleable.Pointer_pointerIconCopy; 544 case TYPE_ALL_SCROLL: 545 return com.android.internal.R.styleable.Pointer_pointerIconAllScroll; 546 case TYPE_NO_DROP: 547 return com.android.internal.R.styleable.Pointer_pointerIconNodrop; 548 case TYPE_HORIZONTAL_DOUBLE_ARROW: 549 return com.android.internal.R.styleable.Pointer_pointerIconHorizontalDoubleArrow; 550 case TYPE_VERTICAL_DOUBLE_ARROW: 551 return com.android.internal.R.styleable.Pointer_pointerIconVerticalDoubleArrow; 552 case TYPE_TOP_RIGHT_DIAGONAL_DOUBLE_ARROW: 553 return com.android.internal.R.styleable. 554 Pointer_pointerIconTopRightDiagonalDoubleArrow; 555 case TYPE_TOP_LEFT_DIAGONAL_DOUBLE_ARROW: 556 return com.android.internal.R.styleable. 557 Pointer_pointerIconTopLeftDiagonalDoubleArrow; 558 case TYPE_ZOOM_IN: 559 return com.android.internal.R.styleable.Pointer_pointerIconZoomIn; 560 case TYPE_ZOOM_OUT: 561 return com.android.internal.R.styleable.Pointer_pointerIconZoomOut; 562 case TYPE_GRAB: 563 return com.android.internal.R.styleable.Pointer_pointerIconGrab; 564 case TYPE_GRABBING: 565 return com.android.internal.R.styleable.Pointer_pointerIconGrabbing; 566 default: 567 return 0; 568 } 569 } 570 } 571
