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98 changes: 98 additions & 0 deletions
98
core/src/main/kotlin/org/jetbrains/jewel/painter/BadgePainter.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,98 @@ | ||
| package org.jetbrains.jewel.painter | ||
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| import androidx.compose.ui.geometry.Offset | ||
| import androidx.compose.ui.geometry.Rect | ||
| import androidx.compose.ui.geometry.Size | ||
| import androidx.compose.ui.graphics.BlendMode | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.graphics.ColorFilter | ||
| import androidx.compose.ui.graphics.Paint | ||
| import androidx.compose.ui.graphics.drawOutline | ||
| import androidx.compose.ui.graphics.drawscope.DrawScope | ||
| import androidx.compose.ui.graphics.drawscope.drawIntoCanvas | ||
| import androidx.compose.ui.graphics.painter.Painter | ||
| import androidx.compose.ui.graphics.withSaveLayer | ||
| import androidx.compose.ui.unit.Density | ||
| import androidx.compose.ui.unit.LayoutDirection | ||
| import org.jetbrains.jewel.painter.badge.BadgeShape | ||
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| class BadgePainter(source: Painter, private val color: Color, private val shape: BadgeShape) : DelegatePainter(source) { | ||
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| /** | ||
| * Optional [Paint] used to draw contents into an offscreen layer in order to apply | ||
| * alpha or [ColorFilter] parameters accordingly. If no alpha or [ColorFilter] is | ||
| * provided or the [Painter] implementation implements [applyAlpha] and | ||
| * [applyColorFilter] then this paint is not used | ||
| */ | ||
| private var layerPaint: Paint? = null | ||
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| /** | ||
| * Lazily create a [Paint] object or return the existing instance if it is already allocated | ||
| */ | ||
| private fun obtainPaint(): Paint { | ||
| var target = layerPaint | ||
| if (target == null) { | ||
| target = Paint() | ||
| layerPaint = target | ||
| } | ||
| return target | ||
| } | ||
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| private fun DrawScope.drawHole() { | ||
| val badge = shape.createHoleOutline(size, layoutDirection, Density(density)) | ||
| drawOutline(badge, Color.White, alpha, blendMode = BlendMode.Clear) | ||
| } | ||
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| private fun DrawScope.drawBadge() { | ||
| val badge = shape.createOutline(size, layoutDirection, Density(density)) | ||
| drawOutline(badge, color, alpha) | ||
| } | ||
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| override fun DrawScope.onDraw() { | ||
| val layerRect = Rect(Offset.Zero, Size(size.width, size.height)) | ||
| drawIntoCanvas { canvas -> | ||
| canvas.withSaveLayer(layerRect, obtainPaint()) { | ||
| drawDelegate() | ||
| drawHole() | ||
| drawBadge() | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| open class DelegatePainter(private val delegate: Painter) : Painter() { | ||
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| override val intrinsicSize: Size | ||
| get() = delegate.intrinsicSize | ||
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| protected var alpha: Float = 1f | ||
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| protected var filter: ColorFilter? = null | ||
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| protected var layoutDirection: LayoutDirection = LayoutDirection.Ltr | ||
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| override fun applyAlpha(alpha: Float): Boolean { | ||
| this.alpha = alpha | ||
| return true | ||
| } | ||
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| override fun applyColorFilter(colorFilter: ColorFilter?): Boolean { | ||
| this.filter = colorFilter | ||
| return true | ||
| } | ||
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| override fun applyLayoutDirection(layoutDirection: LayoutDirection): Boolean { | ||
| this.layoutDirection = layoutDirection | ||
| return true | ||
| } | ||
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| protected fun DrawScope.drawDelegate() { | ||
| with(delegate) { | ||
| draw(this@drawDelegate.size, alpha, filter) | ||
| } | ||
| } | ||
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| override fun DrawScope.onDraw() { | ||
| drawDelegate() | ||
| } | ||
| } |
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15 changes: 15 additions & 0 deletions
15
core/src/main/kotlin/org/jetbrains/jewel/painter/badge/BadgeShape.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package org.jetbrains.jewel.painter.badge | ||
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| import androidx.compose.ui.geometry.Rect | ||
| import androidx.compose.ui.geometry.Size | ||
| import androidx.compose.ui.graphics.Outline | ||
| import androidx.compose.ui.graphics.Shape | ||
| import androidx.compose.ui.unit.Density | ||
| import androidx.compose.ui.unit.LayoutDirection | ||
|
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| interface BadgeShape : Shape { | ||
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| fun createHoleOutline(size: Size, layoutDirection: LayoutDirection, density: Density): Outline | ||
| } | ||
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| internal val emptyOutline = Outline.Rectangle(Rect.Zero) |
64 changes: 64 additions & 0 deletions
64
core/src/main/kotlin/org/jetbrains/jewel/painter/badge/DotBadgeShape.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,64 @@ | ||
| package org.jetbrains.jewel.painter.badge | ||
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| import androidx.compose.ui.geometry.CornerRadius | ||
| import androidx.compose.ui.geometry.RoundRect | ||
| import androidx.compose.ui.geometry.Size | ||
| import androidx.compose.ui.graphics.Outline | ||
| import androidx.compose.ui.unit.Density | ||
| import androidx.compose.ui.unit.LayoutDirection | ||
| import org.jetbrains.jewel.GenerateDataFunctions | ||
|
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| /** | ||
| * @see com.intellij.ui.BadgeDotProvider | ||
| */ | ||
| @GenerateDataFunctions | ||
| class DotBadgeShape( | ||
| val x: Float = 16.5f / 20, | ||
| val y: Float = 3.5f / 20, | ||
| val radius: Float = 3.5f / 20, | ||
| val border: Float = 1.5f / 20, | ||
| ) : BadgeShape { | ||
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| override fun createHoleOutline(size: Size, layoutDirection: LayoutDirection, density: Density): Outline = | ||
| createOutline(size, layoutDirection, density, hole = true) | ||
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| override fun createOutline(size: Size, layoutDirection: LayoutDirection, density: Density): Outline = | ||
| createOutline(size, layoutDirection, density, hole = false) | ||
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| private fun createOutline(size: Size, layoutDirection: LayoutDirection, density: Density, hole: Boolean): Outline { | ||
| val dotSize = size.width.coerceAtMost(size.height) | ||
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| if (dotSize <= 0) return emptyOutline | ||
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| val radius = dotSize * radius | ||
| if (radius <= 0) return emptyOutline | ||
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| val x = size.width * x | ||
| if (0 > x + radius || x - radius > size.width) return emptyOutline | ||
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| val y = size.height * y | ||
| if (0 > y + radius || y - radius > size.height) return emptyOutline | ||
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| val border = when { | ||
| hole -> dotSize * border | ||
| else -> 0.0f | ||
| } | ||
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| val r = radius + border.coerceAtLeast(0.0f) | ||
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| return Outline.Rounded( | ||
| RoundRect( | ||
| left = x - r, | ||
| top = y - r, | ||
| right = x + r, | ||
| bottom = y + r, | ||
| cornerRadius = CornerRadius(r), | ||
| ), | ||
| ) | ||
| } | ||
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| companion object { | ||
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| val Default = DotBadgeShape() | ||
| } | ||
| } |
38 changes: 38 additions & 0 deletions
38
core/src/main/kotlin/org/jetbrains/jewel/painter/hints/Badge.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| package org.jetbrains.jewel.painter.hints | ||
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| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.graphics.isSpecified | ||
| import androidx.compose.ui.graphics.painter.Painter | ||
| import org.jetbrains.jewel.painter.BadgePainter | ||
| import org.jetbrains.jewel.painter.PainterHint | ||
| import org.jetbrains.jewel.painter.PainterWrapperHint | ||
| import org.jetbrains.jewel.painter.badge.BadgeShape | ||
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| private class BadgeImpl(private val color: Color, private val shape: BadgeShape) : PainterWrapperHint { | ||
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| override fun wrap(painter: Painter): Painter = BadgePainter(painter, color, shape) | ||
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| override fun toString(): String = "Badge(color=$color, shape=$shape)" | ||
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| override fun hashCode(): Int { | ||
| var result = color.hashCode() | ||
| result = 31 * result + shape.hashCode() | ||
| return result | ||
| } | ||
|
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| override fun equals(other: Any?): Boolean { | ||
| if (this === other) return true | ||
| if (other !is BadgeImpl) return false | ||
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| if (color != other.color) return false | ||
| if (shape != other.shape) return false | ||
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| return true | ||
| } | ||
| } | ||
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| fun Badge(color: Color, shape: BadgeShape): PainterHint = if (color.isSpecified) { | ||
| BadgeImpl(color, shape) | ||
| } else { | ||
| PainterHint.None | ||
| } |
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