EnrichedTextImageSpan.kt

package com.swmansion.enriched.text.spans

import android.graphics.drawable.Drawable
import android.os.Handler
import android.os.Looper
import androidx.core.graphics.drawable.DrawableCompat
import com.swmansion.enriched.R
import com.swmansion.enriched.common.AsyncDrawable
import com.swmansion.enriched.common.ResourceManager
import com.swmansion.enriched.common.spans.EnrichedImageSpan
import com.swmansion.enriched.text.EnrichedTextStyle
import com.swmansion.enriched.text.spans.interfaces.EnrichedTextSpan

class EnrichedTextImageSpan(
  drawable: Drawable,
  source: String,
  width: Int,
  height: Int,
  isStaticPlaceholder: Boolean = false,
) : EnrichedImageSpan(drawable, source, width, height, isStaticPlaceholder),
  EnrichedTextSpan {
  override val dependsOnHtmlStyle = false

  override fun rebuildWithStyle(style: EnrichedTextStyle) = this

// We use a callback to trigger a layout rebuild because ForceRedrawSpan/SpanWatcher
// (used in EnrichedImageSpan) doesn’t work in EnrichedTextView with SpannedString.
  fun observeAsyncDrawableLoaded(onLoaded: () -> Unit) {
    val d = drawable

    if (d !is AsyncDrawable) {
      return
    }

    d.onLoaded = {
      Handler(Looper.getMainLooper()).post { onLoaded() }
    }

    if (d.isLoaded) {
      d.onLoaded?.invoke()
    }
  }

  companion object {
    fun createEnrichedImageSpan(
      src: String,
      width: Int,
      height: Int,
      placeholderTintColor: Int,
    ): EnrichedImageSpan {
      var imgDrawable = prepareDrawableForImage(src, width, height, placeholderTintColor)
      var isStaticPlaceholder = false

      if (imgDrawable == null) {
        imgDrawable = ResourceManager.getDrawableResource(R.drawable.broken_image)
        isStaticPlaceholder = true
        DrawableCompat.setTint(imgDrawable, placeholderTintColor)
      }

      return EnrichedTextImageSpan(imgDrawable, src, width, height, isStaticPlaceholder)
    }
  }
}