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For #19933 - Show a media tab item on homescreen for the last tab wit…
…h media
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132 changes: 132 additions & 0 deletions
132
app/src/main/java/org/mozilla/fenix/home/recenttabs/view/RecentTabViewDecorator.kt
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| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
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| package org.mozilla.fenix.home.recenttabs.view | ||
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| import android.view.View | ||
| import android.view.ViewGroup | ||
| import androidx.appcompat.content.res.AppCompatResources | ||
| import mozilla.components.support.ktx.android.content.getColorFromAttr | ||
| import mozilla.components.support.ktx.android.util.dpToPx | ||
| import org.mozilla.fenix.R | ||
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| private const val TOP_MARGIN_DP = 1 | ||
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| /** | ||
| * All possible positions of a recent tab in relation to others when shown in the "Jump back in" section. | ||
| */ | ||
| enum class RecentTabsItemPosition { | ||
| /** | ||
| * This is the only tab to be shown in this section. | ||
| */ | ||
| SINGLE, | ||
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| /** | ||
| * This item is to be shown at the top of the section with others below it. | ||
| */ | ||
| TOP, | ||
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| /** | ||
| * This item is to be shown between others in this section. | ||
| */ | ||
| MIDDLE, | ||
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| /** | ||
| * This item is to be shown at the bottom of the section with others above it. | ||
| */ | ||
| BOTTOM | ||
| } | ||
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| /** | ||
| * Helpers for setting various layout properties for the view from a [RecentTabViewHolder]. | ||
| * | ||
| * Depending on the provided [RecentTabsItemPosition]: | ||
| * - sets a different background so that the entire section possibly containing | ||
| * more such items would have rounded corners but sibling items not. | ||
| * - sets small margins for the items so that there's a clear separation between siblings | ||
| */ | ||
| sealed class RecentTabViewDecorator { | ||
| /** | ||
| * Apply the decoration to [itemView]. | ||
| */ | ||
| abstract operator fun invoke(itemView: View): View | ||
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| companion object { | ||
| /** | ||
| * Get the appropriate decorator to set view background / margins depending on the position | ||
| * of that view in the recent tabs section. | ||
| */ | ||
| fun forPosition(position: RecentTabsItemPosition) = when (position) { | ||
| RecentTabsItemPosition.SINGLE -> SingleTabDecoration | ||
| RecentTabsItemPosition.TOP -> TopTabDecoration | ||
| RecentTabsItemPosition.MIDDLE -> MiddleTabDecoration | ||
| RecentTabsItemPosition.BOTTOM -> BottomTabDecoration | ||
| } | ||
| } | ||
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| /** | ||
| * Decorator for a view shown in the recent tabs section that will update it to express | ||
| * that that item is the single one shown in this section. | ||
| */ | ||
| object SingleTabDecoration : RecentTabViewDecorator() { | ||
| override fun invoke(itemView: View): View { | ||
| val context = itemView.context | ||
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| itemView.background = | ||
| AppCompatResources.getDrawable(context, R.drawable.home_list_row_background) | ||
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| return itemView | ||
| } | ||
| } | ||
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| /** | ||
| * Decorator for a view shown in the recent tabs section that will update it to express | ||
| * that this is an item shown at the top of the section and there are others below it. | ||
| */ | ||
| object TopTabDecoration : RecentTabViewDecorator() { | ||
| override fun invoke(itemView: View): View { | ||
| val context = itemView.context | ||
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| itemView.background = | ||
| AppCompatResources.getDrawable(context, R.drawable.rounded_top_corners) | ||
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| return itemView | ||
| } | ||
| } | ||
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| /** | ||
| * Decorator for a view shown in the recent tabs section that will update it to express | ||
| * that this is an item shown has other recents tabs to be shown on top or below it. | ||
| */ | ||
| object MiddleTabDecoration : RecentTabViewDecorator() { | ||
| override fun invoke(itemView: View): View { | ||
| val context = itemView.context | ||
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| itemView.setBackgroundColor(context.getColorFromAttr(R.attr.above)) | ||
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| (itemView.layoutParams as? ViewGroup.MarginLayoutParams)?.topMargin = | ||
| TOP_MARGIN_DP.dpToPx(context.resources.displayMetrics) | ||
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| return itemView | ||
| } | ||
| } | ||
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| /** | ||
| * Decorator for a view shown in the recent tabs section that will update it to express | ||
| * that this is an item shown at the bottom of the section and there are others above it. | ||
| */ | ||
| object BottomTabDecoration : RecentTabViewDecorator() { | ||
| override fun invoke(itemView: View): View { | ||
| val context = itemView.context | ||
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| itemView.background = | ||
| AppCompatResources.getDrawable(context, R.drawable.rounded_bottom_corners) | ||
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| (itemView.layoutParams as? ViewGroup.MarginLayoutParams)?.topMargin = | ||
| TOP_MARGIN_DP.dpToPx(context.resources.displayMetrics) | ||
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| return itemView | ||
| } | ||
| } | ||
| } |
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