kotlin/mosaic
1
0
Fork 0
mirror of https://github.com/JakeWharton/mosaic.git synced 2025-11-03 13:57:35 +08:00
Code Issues Packages Projects Releases Wiki Activity

Put nodes in charge of rendering themselves

Browse Source
This commit is contained in:
Jake Wharton
2020-10-11 23:18:24 -04:00
parent c5dff2a559
commit fa53cbe1f0
2 changed files with 21 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
mosaic/src/main/kotlin/com/jakewharton/mosaic/nodes.kt
View File

@ -4,10 +4,13 @@ import androidx.compose.runtime.AbstractApplier
import com.facebook.yoga.YogaMeasureOutput
import com.facebook.yoga.YogaNode
import com.facebook.yoga.YogaNodeFactory
import com.jakewharton.crossword.TextCanvas
import com.jakewharton.crossword.visualCodePointCount
internal sealed class MosaicNode {
val yoga: YogaNode = YogaNodeFactory.create()
abstract fun render(canvas: TextCanvas)
}
internal class TextNode(initialValue: String = "") : MosaicNode() {
@ -26,12 +29,30 @@ internal class TextNode(initialValue: String = "") : MosaicNode() {
yoga.dirty()
}
override fun render(canvas: TextCanvas) {
value.split('\n').forEachIndexed { index, line ->
canvas.write(index, 0, line)
}
}
override fun toString() = "Text($value)"
}
internal class BoxNode : MosaicNode() {
val children = mutableListOf<MosaicNode>()
override fun render(canvas: TextCanvas) {
for (child in children) {
val childYoga = child.yoga
val left = childYoga.layoutX.toInt()
val top = childYoga.layoutY.toInt()
val right = left + childYoga.layoutWidth.toInt()
val bottom = top + childYoga.layoutHeight.toInt()
val clipped = canvas.clip(left, top, right, bottom)
child.render(clipped)
}
}
override fun toString() = children.joinToString(prefix = "Box(", postfix = ")")
}

21
mosaic/src/main/kotlin/com/jakewharton/mosaic/render.kt
View File

@ -7,24 +7,3 @@ internal fun MosaicNode.renderToString(): String {
render(surface)
return surface.toString()
}
private fun MosaicNode.render(canvas: TextCanvas) {
when (this) {
is TextNode -> {
value.split('\n').forEachIndexed { index, line ->
canvas.write(index, 0, line)
}
}
is BoxNode -> {
for (child in children) {
val childYoga = child.yoga
val left = childYoga.layoutX.toInt()
val top = childYoga.layoutY.toInt()
val right = left + childYoga.layoutWidth.toInt()
val bottom = top + childYoga.layoutHeight.toInt()
val clipped = canvas.clip(left, top, right, bottom)
child.render(clipped)
}
}
}
}