Merge pull request #110 from cheonjaeung/cheon/refactor-modifiers

Collect custom modifiers to single file

Author: cheonjaeung

grid/src/commonMain/kotlin/com/cheonjaeung/compose/grid/BoxGridAlignmentModifier.kt

@@ -0,0 +1,141 @@
+package com.cheonjaeung.compose.grid
+
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.node.ModifierNodeElement
+import androidx.compose.ui.node.ParentDataModifierNode
+import androidx.compose.ui.platform.InspectorInfo
+import androidx.compose.ui.unit.Density
+
+internal data class BoxGridParentData(
+    var row: Int? = null,
+    var column: Int? = null,
+    var span: (BoxGridItemSpanScope.() -> BoxGridItemSpan)? = null,
+    var alignment: Alignment? = null
+)
+
+internal class BoxGridCellPositionElement(
+    val row: Int? = null,
+    val column: Int? = null,
+    val inspectorInfo: InspectorInfo.() -> Unit
+) : ModifierNodeElement<BoxGridCellPositionNode>() {
+    override fun create(): BoxGridCellPositionNode {
+        return BoxGridCellPositionNode(row, column)
+    }
+
+    override fun update(node: BoxGridCellPositionNode) {
+        node.row = row
+        node.column = column
+    }
+
+    override fun InspectorInfo.inspectableProperties() {
+        inspectorInfo()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null) return false
+        if (other !is BoxGridCellPositionElement) return false
+        return this.row == other.row && this.column == other.column
+    }
+
+    override fun hashCode(): Int {
+        var hash = row.hashCode()
+        hash = 31 * hash + column.hashCode()
+        return hash
+    }
+}
+
+internal class BoxGridCellPositionNode(
+    var row: Int?,
+    var column: Int?
+) : Modifier.Node(), ParentDataModifierNode {
+    override fun Density.modifyParentData(parentData: Any?): Any {
+        val p = parentData as? BoxGridParentData ?: BoxGridParentData()
+        if (row != null) {
+            p.row = row
+        }
+        if (column != null) {
+            p.column = column
+        }
+        return p
+    }
+}
+
+internal class BoxGridSpanElement(
+    val span: (BoxGridItemSpanScope.() -> BoxGridItemSpan)? = null,
+    val inspectorInfo: InspectorInfo.() -> Unit
+) : ModifierNodeElement<BoxGridSpanNode>() {
+    override fun create(): BoxGridSpanNode {
+        return BoxGridSpanNode(span)
+    }
+
+    override fun update(node: BoxGridSpanNode) {
+        node.span = span
+    }
+
+    override fun InspectorInfo.inspectableProperties() {
+        inspectorInfo()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null) return false
+        if (other !is BoxGridSpanElement) return false
+        return this.span == other.span
+    }
+
+    override fun hashCode(): Int {
+        return span.hashCode()
+    }
+}
+
+internal class BoxGridSpanNode(
+    var span: (BoxGridItemSpanScope.() -> BoxGridItemSpan)?
+) : Modifier.Node(), ParentDataModifierNode {
+    override fun Density.modifyParentData(parentData: Any?): Any {
+        val p = parentData as? BoxGridParentData ?: BoxGridParentData()
+        if (p.span == null) {
+            p.span = span
+        }
+        return p
+    }
+}
+
+internal class BoxGridAlignmentElement(
+    val alignment: Alignment
+) : ModifierNodeElement<BoxGridAlignmentNode>() {
+    override fun create(): BoxGridAlignmentNode {
+        return BoxGridAlignmentNode(alignment)
+    }
+
+    override fun update(node: BoxGridAlignmentNode) {
+        node.alignment = alignment
+    }
+
+    override fun InspectorInfo.inspectableProperties() {
+        name = "align"
+        value = alignment
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null) return false
+        if (other !is BoxGridAlignmentElement) return false
+        return this.alignment == other.alignment
+    }
+
+    override fun hashCode(): Int {
+        return alignment.hashCode()
+    }
+}
+
+internal class BoxGridAlignmentNode(
+    var alignment: Alignment
+) : Modifier.Node(), ParentDataModifierNode {
+    override fun Density.modifyParentData(parentData: Any?): Any {
+        val p = parentData as? BoxGridParentData ?: BoxGridParentData()
+        p.alignment = alignment
+        return p
+    }
+}