Doric/src/shader/DoricVLayoutNode.ts

import { DoricGroupViewNode, LayoutSpec, FrameSize, LEFT, RIGHT, CENTER_X, CENTER_Y, TOP, BOTTOM, toPixelString } from "./DoricViewNode";

export class DoricVLayoutNode extends DoricGroupViewNode {
    space = 0
    gravity = 0

    build() {
        const ret = document.createElement('div')
        ret.style.display = "flex"
        ret.style.flexDirection = "column"
        ret.style.flexWrap = "nowrap"
        return ret
    }
    blendProps(v: HTMLElement, propName: string, prop: any) {
        if (propName === 'space') {
            this.space = prop
        } else if (propName === 'gravity') {
            this.gravity = prop
            if ((this.gravity & LEFT) === LEFT) {
                this.view.style.alignItems = "flex-start"
            } else if ((this.gravity & RIGHT) === RIGHT) {
                this.view.style.alignItems = "flex-end"
            } else if ((this.gravity & CENTER_X) === CENTER_X) {
                this.view.style.alignItems = "center"
            }
            if ((this.gravity & TOP) === TOP) {
                this.view.style.justifyContent = "flex-start"
            } else if ((this.gravity & BOTTOM) === BOTTOM) {
                this.view.style.justifyContent = "flex-end"
            } else if ((this.gravity & CENTER_Y) === CENTER_Y) {
                this.view.style.justifyContent = "center"
            }
        } else {
            super.blendProps(v, propName, prop)
        }
    }

    layout() {
        super.layout()
        this.childNodes.forEach((e, idx) => {
            e.view.style.flexShrink = "0"
            if (e.layoutConfig?.weight) {
                e.view.style.flex = `${e.layoutConfig?.weight}`
            }
            e.view.style.marginTop = toPixelString(e.layoutConfig?.margin?.top || 0)
            e.view.style.marginBottom = toPixelString(
                (idx === this.childNodes.length - 1) ? 0 : this.space
                    + (e.layoutConfig?.margin?.bottom || 0))
            e.view.style.marginLeft = toPixelString(e.layoutConfig?.margin?.left || 0)
            e.view.style.marginRight = toPixelString(e.layoutConfig?.margin?.right || 0)
        })
    }
}