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.graphics.drawable; 18 19 import com.android.internal.R; 20 21 import android.annotation.NonNull; 22 23 import org.xmlpull.v1.XmlPullParser; 24 import org.xmlpull.v1.XmlPullParserException; 25 26 import android.content.res.ColorStateList; 27 import android.content.res.Resources; 28 import android.content.res.TypedArray; 29 import android.content.res.Resources.Theme; 30 import android.graphics.Bitmap; 31 import android.graphics.Canvas; 32 import android.graphics.ColorFilter; 33 import android.graphics.Insets; 34 import android.graphics.Outline; 35 import android.graphics.PixelFormat; 36 import android.graphics.PorterDuff.Mode; 37 import android.graphics.drawable.Drawable.ConstantState; 38 import android.graphics.Rect; 39 import android.util.AttributeSet; 40 41 import java.io.IOException; 42 import java.util.Collection; 43 44 /** 45 * A Drawable that insets another Drawable by a specified distance. 46 * This is used when a View needs a background that is smaller than 47 * the View's actual bounds. 48 * 49 * <p>It can be defined in an XML file with the <code><inset></code> element. For more 50 * information, see the guide to <a 51 * href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.</p> 52 * 53 * @attr ref android.R.styleable#InsetDrawable_visible 54 * @attr ref android.R.styleable#InsetDrawable_drawable 55 * @attr ref android.R.styleable#InsetDrawable_insetLeft 56 * @attr ref android.R.styleable#InsetDrawable_insetRight 57 * @attr ref android.R.styleable#InsetDrawable_insetTop 58 * @attr ref android.R.styleable#InsetDrawable_insetBottom 59 */ 60 public class InsetDrawable extends Drawable implements Drawable.Callback { 61 private final Rect mTmpRect = new Rect(); 62 63 private final InsetState mState; 64 65 private boolean mMutated; 66 67 /*package*/ InsetDrawable() { 68 this(null, null); 69 } 70 71 public InsetDrawable(Drawable drawable, int inset) { 72 this(drawable, inset, inset, inset, inset); 73 } 74 75 public InsetDrawable(Drawable drawable, int insetLeft, int insetTop, 76 int insetRight, int insetBottom) { 77 this(null, null); 78 79 mState.mDrawable = drawable; 80 mState.mInsetLeft = insetLeft; 81 mState.mInsetTop = insetTop; 82 mState.mInsetRight = insetRight; 83 mState.mInsetBottom = insetBottom; 84 85 if (drawable != null) { 86 drawable.setCallback(this); 87 } 88 } 89 90 @Override 91 public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) 92 throws XmlPullParserException, IOException { 93 final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.InsetDrawable); 94 super.inflateWithAttributes(r, parser, a, R.styleable.InsetDrawable_visible); 95 96 // Reset mDrawable to preserve old multiple-inflate behavior. This is 97 // silly, but we have CTS tests that rely on it. 98 mState.mDrawable = null; 99 100 updateStateFromTypedArray(a); 101 inflateChildElements(r, parser, attrs, theme); 102 verifyRequiredAttributes(a); 103 a.recycle(); 104 } 105 106 private void inflateChildElements(Resources r, XmlPullParser parser, AttributeSet attrs, 107 Theme theme) throws XmlPullParserException, IOException { 108 // Load inner XML elements. 109 if (mState.mDrawable == null) { 110 int type; 111 while ((type=parser.next()) == XmlPullParser.TEXT) { 112 } 113 if (type != XmlPullParser.START_TAG) { 114 throw new XmlPullParserException( 115 parser.getPositionDescription() 116 + ": <inset> tag requires a 'drawable' attribute or " 117 + "child tag defining a drawable"); 118 } 119 final Drawable dr = Drawable.createFromXmlInner(r, parser, attrs, theme); 120 mState.mDrawable = dr; 121 dr.setCallback(this); 122 } 123 } 124 125 private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException { 126 // If we're not waiting on a theme, verify required attributes. 127 if (mState.mDrawable == null && (mState.mThemeAttrs == null 128 || mState.mThemeAttrs[R.styleable.InsetDrawable_drawable] == 0)) { 129 throw new XmlPullParserException(a.getPositionDescription() 130 + ": <inset> tag requires a 'drawable' attribute or " 131 + "child tag defining a drawable"); 132 } 133 } 134 135 private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException { 136 final InsetState state = mState; 137 138 // Account for any configuration changes. 139 state.mChangingConfigurations |= a.getChangingConfigurations(); 140 141 // Extract the theme attributes, if any. 142 state.mThemeAttrs = a.extractThemeAttrs(); 143 144 final int N = a.getIndexCount(); 145 for (int i = 0; i < N; i++) { 146 final int attr = a.getIndex(i); 147 switch (attr) { 148 case R.styleable.InsetDrawable_drawable: 149 final Drawable dr = a.getDrawable(attr); 150 if (dr != null) { 151 state.mDrawable = dr; 152 dr.setCallback(this); 153 } 154 break; 155 case R.styleable.InsetDrawable_inset: 156 final int inset = a.getDimensionPixelOffset(attr, Integer.MIN_VALUE); 157 if (inset != Integer.MIN_VALUE) { 158 state.mInsetLeft = inset; 159 state.mInsetTop = inset; 160 state.mInsetRight = inset; 161 state.mInsetBottom = inset; 162 } 163 break; 164 case R.styleable.InsetDrawable_insetLeft: 165 state.mInsetLeft = a.getDimensionPixelOffset(attr, state.mInsetLeft); 166 break; 167 case R.styleable.InsetDrawable_insetTop: 168 state.mInsetTop = a.getDimensionPixelOffset(attr, state.mInsetTop); 169 break; 170 case R.styleable.InsetDrawable_insetRight: 171 state.mInsetRight = a.getDimensionPixelOffset(attr, state.mInsetRight); 172 break; 173 case R.styleable.InsetDrawable_insetBottom: 174 state.mInsetBottom = a.getDimensionPixelOffset(attr, state.mInsetBottom); 175 break; 176 } 177 } 178 } 179 180 @Override 181 public void applyTheme(Theme t) { 182 super.applyTheme(t); 183 184 final InsetState state = mState; 185 if (state == null) { 186 return; 187 } 188 189 if (state.mThemeAttrs != null) { 190 final TypedArray a = t.resolveAttributes(state.mThemeAttrs, R.styleable.InsetDrawable); 191 try { 192 updateStateFromTypedArray(a); 193 verifyRequiredAttributes(a); 194 } catch (XmlPullParserException e) { 195 throw new RuntimeException(e); 196 } finally { 197 a.recycle(); 198 } 199 } 200 201 if (state.mDrawable != null && state.mDrawable.canApplyTheme()) { 202 state.mDrawable.applyTheme(t); 203 } 204 } 205 206 @Override 207 public boolean canApplyTheme() { 208 return (mState != null && mState.canApplyTheme()) || super.canApplyTheme(); 209 } 210 211 @Override 212 public void invalidateDrawable(Drawable who) { 213 final Callback callback = getCallback(); 214 if (callback != null) { 215 callback.invalidateDrawable(this); 216 } 217 } 218 219 @Override 220 public void scheduleDrawable(Drawable who, Runnable what, long when) { 221 final Callback callback = getCallback(); 222 if (callback != null) { 223 callback.scheduleDrawable(this, what, when); 224 } 225 } 226 227 @Override 228 public void unscheduleDrawable(Drawable who, Runnable what) { 229 final Callback callback = getCallback(); 230 if (callback != null) { 231 callback.unscheduleDrawable(this, what); 232 } 233 } 234 235 @Override 236 public void draw(Canvas canvas) { 237 mState.mDrawable.draw(canvas); 238 } 239 240 @Override 241 public int getChangingConfigurations() { 242 return super.getChangingConfigurations() 243 | mState.mChangingConfigurations 244 | mState.mDrawable.getChangingConfigurations(); 245 } 246 247 @Override 248 public boolean getPadding(Rect padding) { 249 boolean pad = mState.mDrawable.getPadding(padding); 250 251 padding.left += mState.mInsetLeft; 252 padding.right += mState.mInsetRight; 253 padding.top += mState.mInsetTop; 254 padding.bottom += mState.mInsetBottom; 255 256 return pad || (mState.mInsetLeft | mState.mInsetRight | 257 mState.mInsetTop | mState.mInsetBottom) != 0; 258 } 259 260 /** @hide */ 261 @Override 262 public Insets getOpticalInsets() { 263 final Insets contentInsets = super.getOpticalInsets(); 264 return Insets.of(contentInsets.left + mState.mInsetLeft, 265 contentInsets.top + mState.mInsetTop, 266 contentInsets.right + mState.mInsetRight, 267 contentInsets.bottom + mState.mInsetBottom); 268 } 269 270 @Override 271 public void setHotspot(float x, float y) { 272 mState.mDrawable.setHotspot(x, y); 273 } 274 275 @Override 276 public void setHotspotBounds(int left, int top, int right, int bottom) { 277 mState.mDrawable.setHotspotBounds(left, top, right, bottom); 278 } 279 280 /** @hide */ 281 @Override 282 public void getHotspotBounds(Rect outRect) { 283 mState.mDrawable.getHotspotBounds(outRect); 284 } 285 286 @Override 287 public boolean setVisible(boolean visible, boolean restart) { 288 mState.mDrawable.setVisible(visible, restart); 289 return super.setVisible(visible, restart); 290 } 291 292 @Override 293 public void setAlpha(int alpha) { 294 mState.mDrawable.setAlpha(alpha); 295 } 296 297 @Override 298 public int getAlpha() { 299 return mState.mDrawable.getAlpha(); 300 } 301 302 @Override 303 public void setColorFilter(ColorFilter cf) { 304 mState.mDrawable.setColorFilter(cf); 305 } 306 307 @Override 308 public void setTintList(ColorStateList tint) { 309 mState.mDrawable.setTintList(tint); 310 } 311 312 @Override 313 public void setTintMode(Mode tintMode) { 314 mState.mDrawable.setTintMode(tintMode); 315 } 316 317 /** {@hide} */ 318 @Override 319 public void setLayoutDirection(int layoutDirection) { 320 mState.mDrawable.setLayoutDirection(layoutDirection); 321 } 322 323 @Override 324 public int getOpacity() { 325 final InsetState state = mState; 326 final int opacity = state.mDrawable.getOpacity(); 327 if (opacity == PixelFormat.OPAQUE && (state.mInsetLeft > 0 || state.mInsetTop > 0 328 || state.mInsetRight > 0 || state.mInsetBottom > 0)) { 329 return PixelFormat.TRANSLUCENT; 330 } 331 return opacity; 332 } 333 334 @Override 335 public boolean isStateful() { 336 return mState.mDrawable.isStateful(); 337 } 338 339 @Override 340 protected boolean onStateChange(int[] state) { 341 boolean changed = mState.mDrawable.setState(state); 342 onBoundsChange(getBounds()); 343 return changed; 344 } 345 346 @Override 347 protected boolean onLevelChange(int level) { 348 return mState.mDrawable.setLevel(level); 349 } 350 351 @Override 352 protected void onBoundsChange(Rect bounds) { 353 final Rect r = mTmpRect; 354 r.set(bounds); 355 356 r.left += mState.mInsetLeft; 357 r.top += mState.mInsetTop; 358 r.right -= mState.mInsetRight; 359 r.bottom -= mState.mInsetBottom; 360 361 mState.mDrawable.setBounds(r.left, r.top, r.right, r.bottom); 362 } 363 364 @Override 365 public int getIntrinsicWidth() { 366 return mState.mDrawable.getIntrinsicWidth() 367 + mState.mInsetLeft + mState.mInsetRight; 368 } 369 370 @Override 371 public int getIntrinsicHeight() { 372 return mState.mDrawable.getIntrinsicHeight() 373 + mState.mInsetTop + mState.mInsetBottom; 374 } 375 376 @Override 377 public void getOutline(@NonNull Outline outline) { 378 mState.mDrawable.getOutline(outline); 379 } 380 381 @Override 382 public ConstantState getConstantState() { 383 if (mState.canConstantState()) { 384 mState.mChangingConfigurations = getChangingConfigurations(); 385 return mState; 386 } 387 return null; 388 } 389 390 @Override 391 public Drawable mutate() { 392 if (!mMutated && super.mutate() == this) { 393 mState.mDrawable.mutate(); 394 mMutated = true; 395 } 396 return this; 397 } 398 399 /** 400 * @hide 401 */ 402 public void clearMutated() { 403 super.clearMutated(); 404 mState.mDrawable.clearMutated(); 405 mMutated = false; 406 } 407 408 /** 409 * Returns the drawable wrapped by this InsetDrawable. May be null. 410 */ 411 public Drawable getDrawable() { 412 return mState.mDrawable; 413 } 414 415 final static class InsetState extends ConstantState { 416 int[] mThemeAttrs; 417 int mChangingConfigurations; 418 419 Drawable mDrawable; 420 421 int mInsetLeft = 0; 422 int mInsetTop = 0; 423 int mInsetRight = 0; 424 int mInsetBottom = 0; 425 426 private boolean mCheckedConstantState; 427 private boolean mCanConstantState; 428 429 InsetState(InsetState orig, InsetDrawable owner, Resources res) { 430 if (orig != null) { 431 mThemeAttrs = orig.mThemeAttrs; 432 mChangingConfigurations = orig.mChangingConfigurations; 433 if (res != null) { 434 mDrawable = orig.mDrawable.getConstantState().newDrawable(res); 435 } else { 436 mDrawable = orig.mDrawable.getConstantState().newDrawable(); 437 } 438 mDrawable.setCallback(owner); 439 mDrawable.setLayoutDirection(orig.mDrawable.getLayoutDirection()); 440 mDrawable.setBounds(orig.mDrawable.getBounds()); 441 mDrawable.setLevel(orig.mDrawable.getLevel()); 442 mInsetLeft = orig.mInsetLeft; 443 mInsetTop = orig.mInsetTop; 444 mInsetRight = orig.mInsetRight; 445 mInsetBottom = orig.mInsetBottom; 446 mCheckedConstantState = mCanConstantState = true; 447 } 448 } 449 450 @Override 451 public boolean canApplyTheme() { 452 return mThemeAttrs != null || (mDrawable != null && mDrawable.canApplyTheme()) 453 || super.canApplyTheme(); 454 } 455 456 @Override 457 public Drawable newDrawable() { 458 return new InsetDrawable(this, null); 459 } 460 461 @Override 462 public Drawable newDrawable(Resources res) { 463 return new InsetDrawable(this, res); 464 } 465 466 @Override 467 public int getChangingConfigurations() { 468 return mChangingConfigurations; 469 } 470 471 boolean canConstantState() { 472 if (!mCheckedConstantState) { 473 mCanConstantState = mDrawable.getConstantState() != null; 474 mCheckedConstantState = true; 475 } 476 477 return mCanConstantState; 478 } 479 480 @Override 481 public int addAtlasableBitmaps(Collection<Bitmap> atlasList) { 482 final ConstantState state = mDrawable.getConstantState(); 483 if (state != null) { 484 return state.addAtlasableBitmaps(atlasList); 485 } 486 return 0; 487 } 488 } 489 490 private InsetDrawable(InsetState state, Resources res) { 491 mState = new InsetState(state, this, res); 492 } 493 } 494 495
