80 lines
2.7 KiB
Kotlin
80 lines
2.7 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.home.sessioncontrol.viewholders.onboarding
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.Paint
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import android.text.SpannableString
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import android.text.Spanned
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import android.text.style.ImageSpan
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import android.view.View
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import androidx.annotation.DrawableRes
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import androidx.appcompat.content.res.AppCompatResources
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import androidx.recyclerview.widget.RecyclerView
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import kotlinx.android.synthetic.main.onboarding_private_browsing.view.*
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import org.mozilla.fenix.R
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import org.mozilla.fenix.ext.setBounds
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class OnboardingPrivateBrowsingViewHolder(view: View) : RecyclerView.ViewHolder(view) {
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init {
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view.header_text.setOnboardingIcon(R.drawable.ic_onboarding_private_browsing)
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// Display a private browsing icon as a character inside the description text.
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val inlineIcon = PrivateBrowsingImageSpan(
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view.context,
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R.drawable.ic_private_browsing,
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view.description_text.lineHeight
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)
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val text = SpannableString(view.context.getString(R.string.onboarding_private_browsing_description)).apply {
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val spanStartIndex = indexOf(IMAGE_PLACEHOLDER)
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setSpan(
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inlineIcon,
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spanStartIndex,
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spanStartIndex + IMAGE_PLACEHOLDER.length,
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Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
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)
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}
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view.description_text.text = text
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}
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class PrivateBrowsingImageSpan(
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context: Context,
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@DrawableRes drawableId: Int,
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size: Int
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) : ImageSpan(
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AppCompatResources.getDrawable(context, drawableId)!!.apply { setBounds(size) }
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) {
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override fun draw(
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canvas: Canvas,
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text: CharSequence?,
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start: Int,
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end: Int,
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x: Float,
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top: Int,
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y: Int,
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bottom: Int,
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paint: Paint
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) {
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canvas.save()
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val fmPaint = paint.fontMetricsInt
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val fontHeight = fmPaint.descent - fmPaint.ascent
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val centerY = y + fmPaint.descent - fontHeight / 2
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val transY = (centerY - (drawable.bounds.bottom - drawable.bounds.top) / 2).toFloat()
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canvas.translate(x, transY)
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drawable.draw(canvas)
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canvas.restore()
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}
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}
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companion object {
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const val IMAGE_PLACEHOLDER = "%s"
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const val LAYOUT_ID = R.layout.onboarding_private_browsing
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}
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}
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