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import PlainDraggable from 'plain-draggable'
import { onRemove } from './utils'
export class Layout {
constructor(options = {}) {
if (!options.name) throw Error("Layout name is not given")
this.name = options.name
this.enterHandler = options.enterHandler
this.leaveHandler = options.leaveHandler
}
valueOf = () => this.name
}
export class SideBySide extends Layout {
name = "side-by-side"
enterHandler = ({ container, htmlHolder, showcase }) => {
const bar = document.createElement('div')
bar.className = 'bar'
bar.innerHTML = '<div class="bar-handle"></div>'
const handle = bar.querySelector('.bar-handle')
container.appendChild(bar)
// Resize views by value
const resizeByLeft = (left) => {
htmlHolder.style.width = (left) + "px"
showcase.style.width = (parseFloat(getComputedStyle(container).width) - left) + "px"
}
const draggable = new PlainDraggable(bar, {
handle: handle,
containment: { left: '25%', top: 0, right: '75%', height: 0 },
})
draggable.draggableCursor = "grab"
draggable.onDrag = (pos) => {
handle.style.transform = 'unset'
resizeByLeft(pos.left)
}
draggable.onDragEnd = (_) => {
handle.removeAttribute('style')
}
onRemove(bar, () => draggable.remove())
}
leaveHandler = ({ container }) => {
container.querySelector('.bar')?.remove()
}
}
export class Overlay extends Layout {
name = "overlay"
enterHandler = (dumbymap) => {
const container = dumbymap.htmlHolder
const moveIntoDraggable = (block) => {
// Create draggable block
const draggableBlock = document.createElement('div')
draggableBlock.classList.add('draggable-block')
draggableBlock.innerHTML = `
<div class="draggable">
<div class="handle">\u2630</div>
</div>
<div class="utils">
<div id="close">\u274C</div>
<div id="plus-font-size" ">\u2795</div>
<div id="minus-font-size">\u2796</div>
</div>
`
// Add draggable part
const draggablePart = draggableBlock.querySelector('.draggable')
draggablePart.title = 'Use middle-click to remove block'
draggablePart.onmouseup = (e) => {
if (e.button === 1) {
// Hide block with middle click
draggableBlock.setAttribute("data-state", "hide")
}
}
// Set elements
draggableBlock.appendChild(draggablePart)
draggableBlock.appendChild(block)
container.appendChild(draggableBlock)
// Add draggable instance
const draggableInstance = new PlainDraggable(draggableBlock, {
handle: draggablePart,
snap: { x: { step: 20 }, y: { step: 20 } },
})
// Close button
draggableBlock.querySelector('#close').onclick = () => {
draggableBlock.classList.add('hide')
}
// Plus/Minus font-size of content
draggableBlock.querySelector('#plus-font-size').onclick = () => {
const fontSize = parseFloat(getComputedStyle(block).fontSize) / 16
block.style.fontSize = `${fontSize + 0.1}rem`
}
draggableBlock.querySelector('#minus-font-size').onclick = () => {
const fontSize = parseFloat(getComputedStyle(block).fontSize) / 16
block.style.fontSize = `${fontSize - 0.1}rem`
}
// FIXME use pure CSS to hide utils
const utils = draggableBlock.querySelector('.utils')
draggableInstance.onDragStart = () => {
utils.style.opacity = 0
draggableBlock.classList.add('drag')
}
draggableInstance.onDragEnd = () => {
utils.style = ''
draggableBlock.classList.remove('drag')
}
// Reposition draggable instance when resized
new ResizeObserver(() => {
try {
draggableInstance.position();
} catch (_) {
null
}
}).observe(draggableBlock);
// Callback for remove
onRemove(draggableBlock, () => {
draggableInstance.remove()
})
return draggableInstance
}
// Create draggable blocks and set each position by previous one
let [x, y] = [0, 0]
dumbymap.blocks.map(moveIntoDraggable)
.forEach(draggable => {
draggable.left = x
draggable.top = y
const rect = draggable.element.getBoundingClientRect()
x += rect.width + 30
if (x > window.innerWidth) {
y += 200
x = x % window.innerWidth
}
})
}
leaveHandler = ({ htmlHolder, blocks }) => {
const resumeFromDraggable = (block) => {
const draggableContainer = block.closest('.draggable-block')
if (!draggableContainer) return
htmlHolder.appendChild(block)
draggableContainer.remove()
}
blocks.forEach(resumeFromDraggable)
}
}
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