/*
* 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 com.glview.graphics.drawable;
import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.Build;
import android.util.AttributeSet;
import com.glview.content.GLContext;
import com.glview.graphics.Rect;
import com.glview.hwui.GLCanvas;
/**
* 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 InsetState mInsetState;
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);
mInsetState.mDrawable = drawable;
mInsetState.mInsetLeft = insetLeft;
mInsetState.mInsetTop = insetTop;
mInsetState.mInsetRight = insetRight;
mInsetState.mInsetBottom = insetBottom;
if (drawable != null) {
drawable.setCallback(this);
}
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
throws XmlPullParserException, IOException {
final TypedArray a = obtainAttributes(r, attrs, com.glview.R.styleable.InsetDrawable);
super.inflateWithAttributes(r, parser, a, com.glview.R.styleable.InsetDrawable_visible);
mInsetState.mDrawable = null;
updateStateFromTypedArray(a);
// Load inner XML elements.
if (mInsetState.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);
mInsetState.mDrawable = dr;
dr.setCallback(this);
}
verifyRequiredAttributes(a);
a.recycle();
}
private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException {
// If we're not waiting on a theme, verify required attributes.
if (mInsetState.mDrawable == null) {
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 = mInsetState;
// Account for any configuration changes.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
state.mChangingConfigurations |= a.getChangingConfigurations();
}
final int N = a.getIndexCount();
for (int i = 0; i < N; i++) {
final int attr = a.getIndex(i);
if (attr == com.glview.R.styleable.InsetDrawable_drawable) {
final Drawable dr = GLContext.get().getResources()
.getDrawable(a.getResourceId(attr, 0));
if (dr != null) {
state.mDrawable = dr;
dr.setCallback(this);
}
} else if (attr == com.glview.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;
}
} else if (attr == com.glview.R.styleable.InsetDrawable_insetLeft) {
state.mInsetLeft = a.getDimensionPixelOffset(attr,
state.mInsetLeft);
} else if (attr == com.glview.R.styleable.InsetDrawable_insetTop) {
state.mInsetTop = a.getDimensionPixelOffset(attr,
state.mInsetTop);
} else if (attr == com.glview.R.styleable.InsetDrawable_insetRight) {
state.mInsetRight = a.getDimensionPixelOffset(attr,
state.mInsetRight);
} else if (attr == com.glview.R.styleable.InsetDrawable_insetBottom) {
state.mInsetBottom = a.getDimensionPixelOffset(attr,
state.mInsetBottom);
}
}
}
@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(GLCanvas canvas) {
mInsetState.mDrawable.draw(canvas);
}
@Override
public int getChangingConfigurations() {
return super.getChangingConfigurations()
| mInsetState.mChangingConfigurations
| mInsetState.mDrawable.getChangingConfigurations();
}
@Override
public boolean getPadding(Rect padding) {
boolean pad = mInsetState.mDrawable.getPadding(padding);
padding.left += mInsetState.mInsetLeft;
padding.right += mInsetState.mInsetRight;
padding.top += mInsetState.mInsetTop;
padding.bottom += mInsetState.mInsetBottom;
return pad || (mInsetState.mInsetLeft | mInsetState.mInsetRight |
mInsetState.mInsetTop | mInsetState.mInsetBottom) != 0;
}
/** @hide */
@Override
public Insets getOpticalInsets() {
final Insets contentInsets = super.getOpticalInsets();
return Insets.of(contentInsets.left + mInsetState.mInsetLeft,
contentInsets.top + mInsetState.mInsetTop,
contentInsets.right + mInsetState.mInsetRight,
contentInsets.bottom + mInsetState.mInsetBottom);
}
@Override
public void setHotspot(float x, float y) {
mInsetState.mDrawable.setHotspot(x, y);
}
@Override
public void setHotspotBounds(int left, int top, int right, int bottom) {
mInsetState.mDrawable.setHotspotBounds(left, top, right, bottom);
}
/** @hide */
@Override
public void getHotspotBounds(Rect outRect) {
mInsetState.mDrawable.getHotspotBounds(outRect);
}
@Override
public boolean setVisible(boolean visible, boolean restart) {
mInsetState.mDrawable.setVisible(visible, restart);
return super.setVisible(visible, restart);
}
@Override
public void setAlpha(int alpha) {
mInsetState.mDrawable.setAlpha(alpha);
}
@Override
public int getAlpha() {
return mInsetState.mDrawable.getAlpha();
}
/** {@hide} */
@Override
public void setLayoutDirection(int layoutDirection) {
mInsetState.mDrawable.setLayoutDirection(layoutDirection);
}
@Override
public int getOpacity() {
return mInsetState.mDrawable.getOpacity();
}
@Override
public boolean isStateful() {
return mInsetState.mDrawable.isStateful();
}
@Override
protected boolean onStateChange(int[] state) {
boolean changed = mInsetState.mDrawable.setState(state);
onBoundsChange(getBounds());
return changed;
}
@Override
protected boolean onLevelChange(int level) {
return mInsetState.mDrawable.setLevel(level);
}
@Override
protected void onBoundsChange(Rect bounds) {
final Rect r = mTmpRect;
r.set(bounds);
r.left += mInsetState.mInsetLeft;
r.top += mInsetState.mInsetTop;
r.right -= mInsetState.mInsetRight;
r.bottom -= mInsetState.mInsetBottom;
mInsetState.mDrawable.setBounds(r.left, r.top, r.right, r.bottom);
}
@Override
public int getIntrinsicWidth() {
return mInsetState.mDrawable.getIntrinsicWidth();
}
@Override
public int getIntrinsicHeight() {
return mInsetState.mDrawable.getIntrinsicHeight();
}
@Override
public ConstantState getConstantState() {
if (mInsetState.canConstantState()) {
mInsetState.mChangingConfigurations = getChangingConfigurations();
return mInsetState;
}
return null;
}
@Override
public Drawable mutate() {
if (!mMutated && super.mutate() == this) {
mInsetState.mDrawable.mutate();
mMutated = true;
}
return this;
}
/**
* Returns the drawable wrapped by this InsetDrawable. May be null.
*/
public Drawable getDrawable() {
return mInsetState.mDrawable;
}
final static class InsetState extends ConstantState {
int mChangingConfigurations;
Drawable mDrawable;
int mInsetLeft;
int mInsetTop;
int mInsetRight;
int mInsetBottom;
boolean mCheckedConstantState;
boolean mCanConstantState;
InsetState(InsetState orig, InsetDrawable owner, Resources res) {
if (orig != null) {
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 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;
}
}
private InsetDrawable(InsetState state, Resources res) {
mInsetState = new InsetState(state, this, res);
}
}