| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.graphics.drawable; |
| |
| import com.android.internal.R; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import android.annotation.NonNull; |
| import android.content.res.Resources; |
| import android.content.res.Resources.Theme; |
| import android.content.res.TypedArray; |
| import android.graphics.Insets; |
| import android.graphics.Outline; |
| import android.graphics.PixelFormat; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| |
| import java.io.IOException; |
| |
| /** |
| * A Drawable that insets another Drawable by a specified distance. |
| * This is used when a View needs a background that is smaller than |
| * the View's actual bounds. |
| * |
| * <p>It can be defined in an XML file with the <code><inset></code> element. For more |
| * information, see the guide to <a |
| * href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.</p> |
| * |
| * @attr ref android.R.styleable#InsetDrawable_visible |
| * @attr ref android.R.styleable#InsetDrawable_drawable |
| * @attr ref android.R.styleable#InsetDrawable_insetLeft |
| * @attr ref android.R.styleable#InsetDrawable_insetRight |
| * @attr ref android.R.styleable#InsetDrawable_insetTop |
| * @attr ref android.R.styleable#InsetDrawable_insetBottom |
| */ |
| public class InsetDrawable extends DrawableWrapper { |
| private final Rect mTmpRect = new Rect(); |
| |
| private InsetState mState; |
| |
| /** |
| * No-arg constructor used by drawable inflation. |
| */ |
| InsetDrawable() { |
| this(new InsetState(null), null); |
| } |
| |
| /** |
| * Creates a new inset drawable with the specified inset. |
| * |
| * @param drawable The drawable to inset. |
| * @param inset Inset in pixels around the drawable. |
| */ |
| public InsetDrawable(Drawable drawable, int inset) { |
| this(drawable, inset, inset, inset, inset); |
| } |
| |
| /** |
| * Creates a new inset drawable with the specified insets. |
| * |
| * @param drawable The drawable to inset. |
| * @param insetLeft Left inset in pixels. |
| * @param insetTop Top inset in pixels. |
| * @param insetRight Right inset in pixels. |
| * @param insetBottom Bottom inset in pixels. |
| */ |
| public InsetDrawable(Drawable drawable, int insetLeft, int insetTop,int insetRight, |
| int insetBottom) { |
| this(new InsetState(null), null); |
| |
| mState.mInsetLeft = insetLeft; |
| mState.mInsetTop = insetTop; |
| mState.mInsetRight = insetRight; |
| mState.mInsetBottom = insetBottom; |
| |
| setDrawable(drawable); |
| } |
| |
| @Override |
| public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) |
| throws XmlPullParserException, IOException { |
| super.inflate(r, parser, attrs, theme); |
| |
| final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.InsetDrawable); |
| updateStateFromTypedArray(a); |
| inflateChildDrawable(r, parser, attrs, theme); |
| verifyRequiredAttributes(a); |
| a.recycle(); |
| } |
| |
| private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException { |
| // If we're not waiting on a theme, verify required attributes. |
| if (getDrawable() == null && (mState.mThemeAttrs == null |
| || mState.mThemeAttrs[R.styleable.InsetDrawable_drawable] == 0)) { |
| throw new XmlPullParserException(a.getPositionDescription() |
| + ": <inset> tag requires a 'drawable' attribute or " |
| + "child tag defining a drawable"); |
| } |
| } |
| |
| @Override |
| void updateStateFromTypedArray(TypedArray a) { |
| super.updateStateFromTypedArray(a); |
| |
| final InsetState state = mState; |
| final int N = a.getIndexCount(); |
| for (int i = 0; i < N; i++) { |
| final int attr = a.getIndex(i); |
| switch (attr) { |
| case R.styleable.InsetDrawable_drawable: |
| final Drawable dr = a.getDrawable(attr); |
| if (dr != null) { |
| setDrawable(dr); |
| } |
| break; |
| case R.styleable.InsetDrawable_inset: |
| final int inset = a.getDimensionPixelOffset(attr, Integer.MIN_VALUE); |
| if (inset != Integer.MIN_VALUE) { |
| state.mInsetLeft = inset; |
| state.mInsetTop = inset; |
| state.mInsetRight = inset; |
| state.mInsetBottom = inset; |
| } |
| break; |
| case R.styleable.InsetDrawable_insetLeft: |
| state.mInsetLeft = a.getDimensionPixelOffset(attr, state.mInsetLeft); |
| break; |
| case R.styleable.InsetDrawable_insetTop: |
| state.mInsetTop = a.getDimensionPixelOffset(attr, state.mInsetTop); |
| break; |
| case R.styleable.InsetDrawable_insetRight: |
| state.mInsetRight = a.getDimensionPixelOffset(attr, state.mInsetRight); |
| break; |
| case R.styleable.InsetDrawable_insetBottom: |
| state.mInsetBottom = a.getDimensionPixelOffset(attr, state.mInsetBottom); |
| break; |
| } |
| } |
| } |
| |
| @Override |
| public void applyTheme(Theme t) { |
| final InsetState state = mState; |
| if (state == null) { |
| return; |
| } |
| |
| if (state.mThemeAttrs != null) { |
| final TypedArray a = t.resolveAttributes(state.mThemeAttrs, R.styleable.InsetDrawable); |
| try { |
| updateStateFromTypedArray(a); |
| verifyRequiredAttributes(a); |
| } catch (XmlPullParserException e) { |
| throw new RuntimeException(e); |
| } finally { |
| a.recycle(); |
| } |
| } |
| |
| // The drawable may have changed as a result of applying the theme, so |
| // apply the theme to the wrapped drawable last. |
| super.applyTheme(t); |
| } |
| |
| @Override |
| public boolean getPadding(Rect padding) { |
| final boolean pad = super.getPadding(padding); |
| |
| padding.left += mState.mInsetLeft; |
| padding.right += mState.mInsetRight; |
| padding.top += mState.mInsetTop; |
| padding.bottom += mState.mInsetBottom; |
| |
| return pad || (mState.mInsetLeft | mState.mInsetRight |
| | mState.mInsetTop | mState.mInsetBottom) != 0; |
| } |
| |
| /** @hide */ |
| @Override |
| public Insets getOpticalInsets() { |
| final Insets contentInsets = super.getOpticalInsets(); |
| return Insets.of(contentInsets.left + mState.mInsetLeft, |
| contentInsets.top + mState.mInsetTop, |
| contentInsets.right + mState.mInsetRight, |
| contentInsets.bottom + mState.mInsetBottom); |
| } |
| |
| @Override |
| public int getOpacity() { |
| final InsetState state = mState; |
| final int opacity = getDrawable().getOpacity(); |
| if (opacity == PixelFormat.OPAQUE && (state.mInsetLeft > 0 || state.mInsetTop > 0 |
| || state.mInsetRight > 0 || state.mInsetBottom > 0)) { |
| return PixelFormat.TRANSLUCENT; |
| } |
| return opacity; |
| } |
| |
| @Override |
| protected void onBoundsChange(Rect bounds) { |
| final Rect r = mTmpRect; |
| r.set(bounds); |
| |
| r.left += mState.mInsetLeft; |
| r.top += mState.mInsetTop; |
| r.right -= mState.mInsetRight; |
| r.bottom -= mState.mInsetBottom; |
| |
| // Apply inset bounds to the wrapped drawable. |
| super.onBoundsChange(r); |
| } |
| |
| @Override |
| public int getIntrinsicWidth() { |
| return getDrawable().getIntrinsicWidth() + mState.mInsetLeft + mState.mInsetRight; |
| } |
| |
| @Override |
| public int getIntrinsicHeight() { |
| return getDrawable().getIntrinsicHeight() + mState.mInsetTop + mState.mInsetBottom; |
| } |
| |
| @Override |
| public void getOutline(@NonNull Outline outline) { |
| getDrawable().getOutline(outline); |
| } |
| |
| @Override |
| DrawableWrapperState mutateConstantState() { |
| mState = new InsetState(mState); |
| return mState; |
| } |
| |
| static final class InsetState extends DrawableWrapper.DrawableWrapperState { |
| int mInsetLeft = 0; |
| int mInsetTop = 0; |
| int mInsetRight = 0; |
| int mInsetBottom = 0; |
| |
| InsetState(InsetState orig) { |
| super(orig); |
| |
| if (orig != null) { |
| mInsetLeft = orig.mInsetLeft; |
| mInsetTop = orig.mInsetTop; |
| mInsetRight = orig.mInsetRight; |
| mInsetBottom = orig.mInsetBottom; |
| } |
| } |
| |
| @Override |
| public Drawable newDrawable(Resources res) { |
| return new InsetDrawable(this, res); |
| } |
| } |
| |
| /** |
| * The one constructor to rule them all. This is called by all public |
| * constructors to set the state and initialize local properties. |
| */ |
| private InsetDrawable(InsetState state, Resources res) { |
| super(state, res); |
| |
| mState = state; |
| } |
| } |
| |