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optimization: do not create empty maps unnecessarily

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GitOrigin-RevId: e5c3b2fd48bd0d0e2396537e9e4069acf670149a
This commit is contained in:
Alexey Kudravtsev
2024-09-13 17:22:04 +02:00
committed by intellij-monorepo-bot
parent f8a5a69513
commit aa8c0b95c7
1 changed files with 14 additions and 5 deletions
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19
platform/util/ui/src/com/intellij/ui/icons/ScaledIconCache.kt
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@@ -24,14 +24,14 @@ private const val SCALED_ICON_CACHE_LIMIT = 8
internal var isIconActivated: Boolean = !GraphicsEnvironment.isHeadless()
internal class ScaledIconCache {
private val cache = Long2ObjectLinkedOpenHashMap<SoftReference<Icon>>(SCALED_ICON_CACHE_LIMIT + 1)
private var cache: Long2ObjectLinkedOpenHashMap<SoftReference<Icon>>? = null
@Synchronized
fun getCachedIcon(host: CachedImageIcon, gc: GraphicsConfiguration?, attributes: IconAttributes): Icon {
val sysScale = JBUIScale.sysScale(gc)
val pixScale = if (JreHiDpiUtil.isJreHiDPIEnabled()) sysScale * JBUIScale.scale(1f) else JBUIScale.scale(1f)
val cacheKey = getCacheKey(pixScale, sysScale, attributes)
cache.getAndMoveToFirst(cacheKey)?.get()?.let {
cache?.getAndMoveToFirst(cacheKey)?.get()?.let {
return it
}
@@ -51,7 +51,7 @@ internal class ScaledIconCache {
attributes
)
// don't worry that empty ref in the map, we compute and put a new icon by the same key, so no need to remove invalid entry
cache.getAndMoveToFirst(cacheKey)?.get()?.let {
cache?.getAndMoveToFirst(cacheKey)?.get()?.let {
return it
}
return loadIcon(host = host, scaleContext = scaleContext, cacheKey = cacheKey, attributes = attributes)
@@ -72,11 +72,12 @@ internal class ScaledIconCache {
// cache it - don't try to load it again and again
val icon = EMPTY_ICON
cache.putAndMoveToFirst(cacheKey, SoftReference(icon))
getOrCreateCache().putAndMoveToFirst(cacheKey, SoftReference(icon))
return icon
}
val icon = ScaledResultIcon(image = image, original = host, objectScale = scaleContext.getScale(ScaleType.OBJ_SCALE).toFloat())
val cache = getOrCreateCache()
cache.putAndMoveToFirst(cacheKey, SoftReference(icon))
if (cache.size > SCALED_ICON_CACHE_LIMIT) {
cache.removeLast()
@@ -84,8 +85,16 @@ internal class ScaledIconCache {
return icon
}
private fun getOrCreateCache(): Long2ObjectLinkedOpenHashMap<SoftReference<Icon>> {
var cache = cache
if (cache == null) {
cache = Long2ObjectLinkedOpenHashMap<SoftReference<Icon>>(SCALED_ICON_CACHE_LIMIT + 1)
this.cache = cache
}
return cache
}
fun clear() {
cache.clear()
cache = null
}
}