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/*
* Copyright 2018 Allan Wang
*
* 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 ca.allanwang.kau.adapters
import android.content.res.ColorStateList
import android.os.Build
import android.view.View
import android.widget.ImageView
import android.widget.TextView
import androidx.annotation.RequiresApi
import ca.allanwang.kau.ui.createSimpleRippleDrawable
import ca.allanwang.kau.utils.adjustAlpha
import com.mikepenz.fastadapter.GenericItem
import com.mikepenz.fastadapter.adapters.FastItemAdapter
/**
* Created by Allan Wang on 2017-06-29.
*
* Adapter with a set of colors that will be added to all subsequent items
* Changing a color while the adapter is not empty will reload all items
*
* This adapter overrides every method where an item is added
* If that item extends [ThemableIItem], then the colors will be set
*/
class FastItemThemedAdapter<Item : GenericItem>(
textColor: Int? = null,
backgroundColor: Int? = null,
accentColor: Int? = null
) : FastItemAdapter<Item>() {
constructor(colors: ThemableIItemColors) : this(
colors.textColor,
colors.backgroundColor,
colors.accentColor
)
init {
itemAdapter.interceptor = {
injectTheme(it)
it
}
}
var textColor: Int? = textColor
set(value) {
if (field == value) return
field = value
themeChanged()
}
var backgroundColor: Int? = backgroundColor
set(value) {
if (field == value) return
field = value
themeChanged()
}
var accentColor: Int? = accentColor
set(value) {
if (field == value) return
field = value
themeChanged()
}
fun setColors(colors: ThemableIItemColors) {
this.textColor = colors.textColor
this.backgroundColor = colors.backgroundColor
this.accentColor = colors.accentColor
}
fun themeChanged() {
if (adapterItemCount == 0) {
return
}
injectTheme(adapterItems)
notifyAdapterDataSetChanged()
}
private fun injectTheme(items: Collection<GenericItem?>?) {
items?.forEach { injectTheme(it) }
}
protected fun injectTheme(item: GenericItem?) {
if (item is ThemableIItem && item.themeEnabled) {
item.textColor = textColor
item.backgroundColor = backgroundColor
item.accentColor = accentColor
}
}
}
interface ThemableIItemColors {
var textColor: Int?
var backgroundColor: Int?
var accentColor: Int?
}
class ThemableIItemColorsDelegate : ThemableIItemColors {
override var textColor: Int? = null
override var backgroundColor: Int? = null
override var accentColor: Int? = null
}
/**
* Interface that needs to be implemented by every iitem
* Holds the color values and has helper methods to inject the colors
*/
interface ThemableIItem : ThemableIItemColors {
var themeEnabled: Boolean
fun bindTextColor(vararg views: TextView?)
fun bindTextColorSecondary(vararg views: TextView?)
fun bindDividerColor(vararg views: View?)
fun bindAccentColor(vararg views: TextView?)
fun bindBackgroundColor(vararg views: View?)
fun bindBackgroundRipple(vararg views: View?)
fun bindIconColor(vararg views: ImageView?)
}
/**
* The delegate for [ThemableIItem]
*/
class ThemableIItemDelegate : ThemableIItem, ThemableIItemColors by ThemableIItemColorsDelegate() {
override var themeEnabled: Boolean = true
override fun bindTextColor(vararg views: TextView?) {
val color = textColor ?: return
views.forEach { it?.setTextColor(color) }
}
override fun bindTextColorSecondary(vararg views: TextView?) {
val color = textColor?.adjustAlpha(0.8f) ?: return
views.forEach { it?.setTextColor(color) }
}
override fun bindAccentColor(vararg views: TextView?) {
val color = accentColor ?: textColor ?: return
views.forEach { it?.setTextColor(color) }
}
override fun bindDividerColor(vararg views: View?) {
val color = (textColor ?: accentColor)?.adjustAlpha(0.1f) ?: return
views.forEach { it?.setBackgroundColor(color) }
}
override fun bindBackgroundColor(vararg views: View?) {
val color = backgroundColor ?: return
views.forEach { it?.setBackgroundColor(color) }
}
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
override fun bindBackgroundRipple(vararg views: View?) {
val background = backgroundColor ?: return
val foreground = accentColor ?: textColor ?: backgroundColor
?: return // default to normal background
val ripple = createSimpleRippleDrawable(foreground, background)
views.forEach { it?.background = ripple }
}
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
override fun bindIconColor(vararg views: ImageView?) {
val color = accentColor ?: textColor ?: return
views.forEach { it?.drawable?.setTintList(ColorStateList.valueOf(color)) }
}
}
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