/*******************************************************************************
* Copyright 2012-present Pixate, Inc.
*
* 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.pixate.freestyle.styling.virtualAdapters;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.DrawableContainer;
import android.widget.Button;
import android.widget.TextView;
import com.pixate.freestyle.styling.PXRuleSet;
import com.pixate.freestyle.styling.adapters.PXStyleAdapter;
import com.pixate.freestyle.styling.cache.PXStyleInfo;
import com.pixate.freestyle.styling.stylers.PXCompoundIconStyler;
import com.pixate.freestyle.styling.stylers.PXStyler;
import com.pixate.freestyle.styling.stylers.PXStylerContext;
import com.pixate.freestyle.styling.stylers.PXStylerContext.IconPosition;
import com.pixate.freestyle.util.PXDrawableUtil;
/**
* Virtual icon adapter for views that support icons (such as {@link TextView}
* and {@link Button}. It handles the following icon positions (as virtual
* children):
*
* <pre>
* <code>
* - icon-top
* - icon-right
* - icon-bottom
* - icon-left
* </code>
* </pre>
*
* For example, this will draw a left icon on a button with a class of
* <code>"myButton"</code>:
*
* <pre>
* .myButton icon-left {
* background-image: url(default.svg);
* background-size: 48px;
* }
*
* .myButton icon-left:pressed {
* background-image: url(pressed.svg);
* background-size: 48px;
* }
* </pre>
*
* @author Shalom Gibly
*/
public class PXVirtualIconAdapter extends PXVirtualChildAdapter {
private static Map<IconPosition, PXVirtualIconAdapter> instances = new HashMap<IconPosition, PXVirtualIconAdapter>(
4);
private IconPosition position;
/**
* Returns a singleton instance of this class.
*
* @return An instance of {@link PXVirtualIconAdapter}
*/
public static PXVirtualIconAdapter getInstance(IconPosition position) {
PXVirtualIconAdapter instance = instances.get(position);
synchronized (PXVirtualIconAdapter.class) {
if (instance == null) {
instance = new PXVirtualIconAdapter(position);
instances.put(position, instance);
}
}
return instance;
}
protected PXVirtualIconAdapter(IconPosition position) {
this.position = position;
}
@Override
public List<String> getSupportedPseudoClasses(Object styleable) {
return new ArrayList<String>(PXDrawableUtil.getSupportedStates().keySet());
}
/*
* (non-Javadoc)
* @see
* com.pixate.freestyle.styling.adapters.PXStyleAdapter#getDefaultPseudoClass
* (java.lang.Object)
*/
@Override
public String getDefaultPseudoClass(Object styleable) {
return PXStyleInfo.DEFAULT_STYLE;
}
/*
* (non-Javadoc)
* @see
* com.pixate.freestyle.styling.adapters.PXViewStyleAdapter#getElementName
* (java.lang.Object)
*/
@Override
public String getElementName(Object object) {
return position.getElementName();
}
/*
* (non-Javadoc)
* @see com.pixate.freestyle.styling.adapters.PXStyleAdapter#createStylers()
*/
@Override
protected List<PXStyler> createStylers() {
List<PXStyler> superStylers = super.createStylers();
List<PXStyler> stylers = new ArrayList<PXStyler>(superStylers.size() + 1);
stylers.addAll(superStylers);
stylers.add(PXCompoundIconStyler.getInstance(position));
return stylers;
}
@Override
public boolean updateStyle(List<PXRuleSet> ruleSets, List<PXStylerContext> contexts) {
if (!super.updateStyle(ruleSets, contexts)) {
return false;
}
// Extract the existing compound icons
TextView styleable = (TextView) contexts.get(0).getStyleable();
Drawable[] compoundDrawables = styleable.getCompoundDrawables();
Drawable iconDrawable = compoundDrawables[position.ordinal()];
Map<int[], Drawable> existingStates = PXDrawableUtil.getExistingStates(iconDrawable);
Drawable newDrawable = null;
if (existingStates == null || existingStates.isEmpty()) {
// create a new StateListDrawable for that icon with the original
// style adapter
if (contexts.size() == 1) {
newDrawable = contexts.get(0).getBackgroundImage();
} else {
newDrawable = PXDrawableUtil.createNewStateListDrawable(
PXStyleAdapter.getStyleAdapter(styleable), ruleSets, contexts);
}
} else {
// create a drawable that will hold a merge of the existing states
// and the new states.
newDrawable = PXDrawableUtil.createDrawable(
PXStyleAdapter.getStyleAdapter(styleable), existingStates, ruleSets, contexts);
}
// Set the drawable.
if (newDrawable != null
&& !PXDrawableUtil.isEquals(newDrawable, compoundDrawables[position.ordinal()])) {
compoundDrawables[position.ordinal()] = newDrawable;
if (newDrawable instanceof DrawableContainer && newDrawable.getCurrent() == null) {
// We have to select a Drawable in the StateListDrawables.
// Otherwise, the bounds will not be set correctly.
DrawableContainer container = (DrawableContainer) newDrawable;
container.selectDrawable(0);
}
newDrawable.setBounds(0, 0, newDrawable.getIntrinsicWidth(),
newDrawable.getIntrinsicHeight());
styleable.setCompoundDrawables(compoundDrawables[0], compoundDrawables[1],
compoundDrawables[2], compoundDrawables[3]);
}
return true;
}
}