150 lines
4.1 KiB
Kotlin
150 lines
4.1 KiB
Kotlin
package jp.juggler.subwaytooter.span
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import android.graphics.Canvas
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import android.graphics.Paint
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import android.graphics.Rect
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import android.graphics.RectF
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import androidx.annotation.IntRange
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import android.text.style.ReplacementSpan
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import jp.juggler.apng.ApngFrames
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import jp.juggler.subwaytooter.App1
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import jp.juggler.subwaytooter.Pref
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import jp.juggler.util.LogCategory
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import java.lang.ref.WeakReference
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class NetworkEmojiSpan internal constructor(
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private val url : String,
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private val scale : Float = 1f
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) : ReplacementSpan(),AnimatableSpan {
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companion object {
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internal val log = LogCategory("NetworkEmojiSpan")
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private const val scale_ratio = 1.14f
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private const val descent_ratio = 0.211f
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}
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private val mPaint = Paint()
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private val rect_src = Rect()
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private val rect_dst = RectF()
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// フレーム探索結果を格納する構造体を確保しておく
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private val mFrameFindResult = ApngFrames.FindFrameResult()
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init {
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mPaint.isFilterBitmap = true
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}
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private var invalidate_callback : AnimatableSpanInvalidator? = null
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private var refDrawTarget : WeakReference<Any>? = null
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override fun setInvalidateCallback(
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draw_target_tag : Any,
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invalidate_callback : AnimatableSpanInvalidator
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) {
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this.refDrawTarget = WeakReference(draw_target_tag)
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this.invalidate_callback = invalidate_callback
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}
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override fun getSize(
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paint : Paint,
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text : CharSequence,
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@IntRange(from = 0) start : Int,
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@IntRange(from = 0) end : Int,
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fm : Paint.FontMetricsInt?
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) : Int {
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val size = (paint.textSize * scale_ratio * scale + 0.5f).toInt()
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if(fm != null) {
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val c_descent = (0.5f + size * descent_ratio).toInt()
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val c_ascent = c_descent - size
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if(fm.ascent > c_ascent) fm.ascent = c_ascent
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if(fm.top > c_ascent) fm.top = c_ascent
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if(fm.descent < c_descent) fm.descent = c_descent
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if(fm.bottom < c_descent) fm.bottom = c_descent
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}
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return 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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baseline : Int,
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bottom : Int,
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textPaint : Paint
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) {
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val invalidate_callback = this.invalidate_callback
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if(invalidate_callback == null) {
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log.e("draw: invalidate_callback is null.")
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return
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}
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// APNGデータの取得
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val frames = App1.custom_emoji_cache.getFrames(refDrawTarget, url) {
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invalidate_callback.delayInvalidate(0)
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} ?: return
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val t = if(Pref.bpDisableEmojiAnimation(App1.pref))
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0L
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else
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invalidate_callback.timeFromStart
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// アニメーション開始時刻からの経過時間に応じたフレームを探索
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frames.findFrame(mFrameFindResult, t)
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val b = mFrameFindResult.bitmap
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if(b == null || b.isRecycled) {
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log.e("draw: bitmap is null or recycled.")
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return
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}
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val srcWidth = b.width
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val srcHeight = b.height
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if(srcWidth < 1 || srcHeight <1){
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log.e("draw: bitmap size is too small.")
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return
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}
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rect_src.set(0, 0, srcWidth, srcHeight )
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// 絵文字の正方形のサイズ
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val dstSize = textPaint.textSize * scale_ratio * scale
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// ベースラインから上下方向にずらすオフセット
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val c_descent = dstSize * descent_ratio
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val transY = baseline - dstSize + c_descent
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// 絵文字のアスペクト比から描画範囲の幅と高さを決める
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val dstWidth:Float
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val dstHeight:Float
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val aspectSrc = srcWidth.toFloat() / srcHeight.toFloat()
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if( aspectSrc >= 1f){
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dstWidth = dstSize
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dstHeight = dstSize /aspectSrc
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}else{
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dstHeight = dstSize
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dstWidth = dstSize * aspectSrc
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}
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val dstX = (dstSize-dstWidth)/2f
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val dstY = (dstSize-dstHeight)/2f
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rect_dst.set(dstX,dstY,dstX+dstWidth,dstY+dstHeight)
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canvas.save()
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canvas.translate(x, transY)
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canvas.drawBitmap(b, rect_src, rect_dst, mPaint)
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canvas.restore()
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// 少し後に描画しなおす
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val delay = mFrameFindResult.delay
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if(delay != Long.MAX_VALUE && ! Pref.bpDisableEmojiAnimation(App1.pref)) {
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invalidate_callback.delayInvalidate(delay)
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}
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}
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}
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