/*
* 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 android.annotation.NonNull;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.content.res.Resources.Theme;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Insets;
import android.graphics.Outline;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.Drawable.ConstantState;
import android.graphics.Rect;
import android.util.AttributeSet;
import java.io.IOException;
import java.util.Collection;
/**
* 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 Drawable implements Drawable.Callback {
private final Rect mTmpRect = new Rect();
private final InsetState mState;
private boolean mMutated;
/*package*/ InsetDrawable() {
this(null, null);
}
public InsetDrawable(Drawable drawable, int inset) {
this(drawable, inset, inset, inset, inset);
}
public InsetDrawable(Drawable drawable, int insetLeft, int insetTop,
int insetRight, int insetBottom) {
this(null, null);
mState.mDrawable = drawable;
mState.mInsetLeft = insetLeft;
mState.mInsetTop = insetTop;
mState.mInsetRight = insetRight;
mState.mInsetBottom = insetBottom;
if (drawable != null) {
drawable.setCallback(this);
}
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
throws XmlPullParserException, IOException {
final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.InsetDrawable);
super.inflateWithAttributes(r, parser, a, R.styleable.InsetDrawable_visible);
// Reset mDrawable to preserve old multiple-inflate behavior. This is
// silly, but we have CTS tests that rely on it.
mState.mDrawable = null;
updateStateFromTypedArray(a);
inflateChildElements(r, parser, attrs, theme);
verifyRequiredAttributes(a);
a.recycle();
}
private void inflateChildElements(Resources r, XmlPullParser parser, AttributeSet attrs,
Theme theme) throws XmlPullParserException, IOException {
// Load inner XML elements.
if (mState.mDrawable == null) {
int type;
while ((type=parser.next()) == XmlPullParser.TEXT) {
}
if (type != XmlPullParser.START_TAG) {
throw new XmlPullParserException(
parser.getPositionDescription()
+ ": <inset> tag requires a 'drawable' attribute or "
+ "child tag defining a drawable");
}
final Drawable dr = Drawable.createFromXmlInner(r, parser, attrs, theme);
mState.mDrawable = dr;
dr.setCallback(this);
}
}
private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException {
// If we're not waiting on a theme, verify required attributes.
if (mState.mDrawable == 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");
}
}
private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
final InsetState state = mState;
// Account for any configuration changes.
state.mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
state.mThemeAttrs = a.extractThemeAttrs();
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) {
state.mDrawable = dr;
dr.setCallback(this);
}
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) {
super.applyTheme(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();
}
}
if (state.mDrawable != null && state.mDrawable.canApplyTheme()) {
state.mDrawable.applyTheme(t);
}
}
@Override
public boolean canApplyTheme() {
return (mState != null && mState.canApplyTheme()) || super.canApplyTheme();
}
@Override
public void invalidateDrawable(Drawable who) {
final Callback callback = getCallback();
if (callback != null) {
callback.invalidateDrawable(this);
}
}
@Override
public void scheduleDrawable(Drawable who, Runnable what, long when) {
final Callback callback = getCallback();
if (callback != null) {
callback.scheduleDrawable(this, what, when);
}
}
@Override
public void unscheduleDrawable(Drawable who, Runnable what) {
final Callback callback = getCallback();
if (callback != null) {
callback.unscheduleDrawable(this, what);
}
}
@Override
public void draw(Canvas canvas) {
mState.mDrawable.draw(canvas);
}
@Override
public int getChangingConfigurations() {
return super.getChangingConfigurations()
| mState.mChangingConfigurations
| mState.mDrawable.getChangingConfigurations();
}
@Override
public boolean getPadding(Rect padding) {
boolean pad = mState.mDrawable.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 void setHotspot(float x, float y) {
mState.mDrawable.setHotspot(x, y);
}
@Override
public void setHotspotBounds(int left, int top, int right, int bottom) {
mState.mDrawable.setHotspotBounds(left, top, right, bottom);
}
/** @hide */
@Override
public void getHotspotBounds(Rect outRect) {
mState.mDrawable.getHotspotBounds(outRect);
}
@Override
public boolean setVisible(boolean visible, boolean restart) {
mState.mDrawable.setVisible(visible, restart);
return super.setVisible(visible, restart);
}
@Override
public void setAlpha(int alpha) {
mState.mDrawable.setAlpha(alpha);
}
@Override
public int getAlpha() {
return mState.mDrawable.getAlpha();
}
@Override
public void setColorFilter(ColorFilter cf) {
mState.mDrawable.setColorFilter(cf);
}
@Override
public void setTintList(ColorStateList tint) {
mState.mDrawable.setTintList(tint);
}
@Override
public void setTintMode(Mode tintMode) {
mState.mDrawable.setTintMode(tintMode);
}
/** {@hide} */
@Override
public void setLayoutDirection(int layoutDirection) {
mState.mDrawable.setLayoutDirection(layoutDirection);
}
@Override
public int getOpacity() {
final InsetState state = mState;
final int opacity = state.mDrawable.getOpacity();
if (opacity == PixelFormat.OPAQUE && (state.mInsetLeft > 0 || state.mInsetTop > 0
|| state.mInsetRight > 0 || state.mInsetBottom > 0)) {
return PixelFormat.TRANSLUCENT;
}
return opacity;
}
@Override
public boolean isStateful() {
return mState.mDrawable.isStateful();
}
@Override
protected boolean onStateChange(int[] state) {
boolean changed = mState.mDrawable.setState(state);
onBoundsChange(getBounds());
return changed;
}
@Override
protected boolean onLevelChange(int level) {
return mState.mDrawable.setLevel(level);
}
@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;
mState.mDrawable.setBounds(r.left, r.top, r.right, r.bottom);
}
@Override
public int getIntrinsicWidth() {
return mState.mDrawable.getIntrinsicWidth()
+ mState.mInsetLeft + mState.mInsetRight;
}
@Override
public int getIntrinsicHeight() {
return mState.mDrawable.getIntrinsicHeight()
+ mState.mInsetTop + mState.mInsetBottom;
}
@Override
public void getOutline(@NonNull Outline outline) {
mState.mDrawable.getOutline(outline);
}
@Override
public ConstantState getConstantState() {
if (mState.canConstantState()) {
mState.mChangingConfigurations = getChangingConfigurations();
return mState;
}
return null;
}
@Override
public Drawable mutate() {
if (!mMutated && super.mutate() == this) {
mState.mDrawable.mutate();
mMutated = true;
}
return this;
}
/**
* @hide
*/
public void clearMutated() {
super.clearMutated();
mState.mDrawable.clearMutated();
mMutated = false;
}
/**
* Returns the drawable wrapped by this InsetDrawable. May be null.
*/
public Drawable getDrawable() {
return mState.mDrawable;
}
final static class InsetState extends ConstantState {
int[] mThemeAttrs;
int mChangingConfigurations;
Drawable mDrawable;
int mInsetLeft = 0;
int mInsetTop = 0;
int mInsetRight = 0;
int mInsetBottom = 0;
private boolean mCheckedConstantState;
private boolean mCanConstantState;
InsetState(InsetState orig, InsetDrawable owner, Resources res) {
if (orig != null) {
mThemeAttrs = orig.mThemeAttrs;
mChangingConfigurations = orig.mChangingConfigurations;
if (res != null) {
mDrawable = orig.mDrawable.getConstantState().newDrawable(res);
} else {
mDrawable = orig.mDrawable.getConstantState().newDrawable();
}
mDrawable.setCallback(owner);
mDrawable.setLayoutDirection(orig.mDrawable.getLayoutDirection());
mDrawable.setBounds(orig.mDrawable.getBounds());
mDrawable.setLevel(orig.mDrawable.getLevel());
mInsetLeft = orig.mInsetLeft;
mInsetTop = orig.mInsetTop;
mInsetRight = orig.mInsetRight;
mInsetBottom = orig.mInsetBottom;
mCheckedConstantState = mCanConstantState = true;
}
}
@Override
public boolean canApplyTheme() {
return mThemeAttrs != null || (mDrawable != null && mDrawable.canApplyTheme())
|| super.canApplyTheme();
}
@Override
public Drawable newDrawable() {
return new InsetDrawable(this, null);
}
@Override
public Drawable newDrawable(Resources res) {
return new InsetDrawable(this, res);
}
@Override
public int getChangingConfigurations() {
return mChangingConfigurations;
}
boolean canConstantState() {
if (!mCheckedConstantState) {
mCanConstantState = mDrawable.getConstantState() != null;
mCheckedConstantState = true;
}
return mCanConstantState;
}
@Override
public int addAtlasableBitmaps(Collection<Bitmap> atlasList) {
final ConstantState state = mDrawable.getConstantState();
if (state != null) {
return state.addAtlasableBitmaps(atlasList);
}
return 0;
}
}
private InsetDrawable(InsetState state, Resources res) {
mState = new InsetState(state, this, res);
}
}
|
