refactor(background): move background into separate package

Signed-off-by: braks <78412429+bcakmakoglu@users.noreply.github.com>

packages/background/src/Background.vue

@@ -0,0 +1,92 @@
+<script lang="ts" setup>
+import { useVueFlow } from '@vue-flow/core'
+import { BackgroundVariant } from './types'
+import type { BackgroundProps } from './types'
+
+const {
+  variant = 'dots' as BackgroundVariant,
+  gap = 10,
+  size = 0.4,
+  height = 100,
+  width = 100,
+  x = 0,
+  y = 0,
+  bgColor,
+  patternColor: initialPatternColor,
+} = defineProps<BackgroundProps>()
+
+const defaultColors: Record<BackgroundVariant, string> = {
+  [BackgroundVariant.Dots]: '#81818a',
+  [BackgroundVariant.Lines]: '#eee',
+}
+
+const { id, viewport } = useVueFlow()
+
+const background = $computed(() => {
+  const scaledGap = gap && gap * viewport.value.zoom
+  const xOffset = scaledGap && viewport.value.x % scaledGap
+  const yOffset = scaledGap && viewport.value.y % scaledGap
+  const bgSize = size * viewport.value.zoom
+
+  return {
+    scaledGap,
+    xOffset,
+    yOffset,
+    size: bgSize,
+  }
+})
+
+// when there are multiple flows on a page we need to make sure that every background gets its own pattern.
+const patternId = `pattern-${id}`
+
+const patternColor = computed(() => initialPatternColor || defaultColors[variant || BackgroundVariant.Dots])
+
+const d = computed(
+  () => `M${background.scaledGap / 2} 0 V${background.scaledGap} M0 ${background.scaledGap / 2} H${background.scaledGap}`,
+)
+</script>
+
+<script lang="ts">
+export default {
+  name: 'Background',
+}
+</script>
+
+<template>
+  <svg
+    class="vue-flow__background"
+    :style="{
+      height: `${height > 100 ? 100 : height}%`,
+      width: `${width > 100 ? 100 : width}%`,
+    }"
+  >
+    <slot :id="patternId" name="pattern-container">
+      <pattern
+        :id="patternId"
+        :x="background.xOffset"
+        :y="background.yOffset"
+        :width="background.scaledGap"
+        :height="background.scaledGap"
+        patternUnits="userSpaceOnUse"
+      >
+        <slot name="pattern">
+          <template v-if="variant === BackgroundVariant.Lines">
+            <path :stroke="patternColor" :stroke-width="size" :d="d" />
+          </template>
+
+          <template v-else-if="variant === BackgroundVariant.Dots">
+            <circle :cx="background.size" :cy="background.size" :r="background.size" :fill="patternColor" />
+          </template>
+
+          <svg v-if="bgColor" height="100" width="100">
+            <rect width="100%" height="100%" :fill="bgColor" />
+          </svg>
+        </slot>
+      </pattern>
+    </slot>
+
+    <rect :x="x" :y="y" width="100%" height="100%" :fill="`url(#${patternId})`" />
+
+    <slot :id="patternId" />
+  </svg>
+</template>

packages/background/src/NodeToolbar.vue

@@ -0,0 +1,91 @@
+<script lang="ts" setup>
+import { computed, inject } from 'vue'
+import type { GraphNode, Rect, ViewpaneTransform } from '@vue-flow/core'
+import { NodeIdInjection, Position, getRectOfNodes, useVueFlow } from '@vue-flow/core'
+
+import type { CSSProperties } from 'vue'
+import type { NodeToolbarProps } from './types'
+
+const props = withDefaults(defineProps<NodeToolbarProps>(), {
+  position: Position.Top,
+  offset: 10,
+})
+
+const contextNodeId = inject(NodeIdInjection, null)
+
+const { viewportRef, viewport, getSelectedNodes, findNode } = useVueFlow()
+
+function getTransform(nodeRect: Rect, transform: ViewpaneTransform, position: Position, offset: number): string {
+  // position === Position.Top
+  let xPos = (nodeRect.x + nodeRect.width / 2) * transform.zoom + transform.x
+  let yPos = nodeRect.y * transform.zoom + transform.y - offset
+  let xShift = -50
+  let yShift = -100
+
+  switch (position) {
+    case Position.Right:
+      xPos = (nodeRect.x + nodeRect.width) * transform.zoom + transform.x + offset
+      yPos = (nodeRect.y + nodeRect.height / 2) * transform.zoom + transform.y
+      xShift = 0
+      yShift = -50
+      break
+    case Position.Bottom:
+      yPos = (nodeRect.y + nodeRect.height) * transform.zoom + transform.y + offset
+      yShift = 0
+      break
+    case Position.Left:
+      xPos = nodeRect.x * transform.zoom + transform.x - offset
+      yPos = (nodeRect.y + nodeRect.height / 2) * transform.zoom + transform.y
+      xShift = -100
+      yShift = -50
+      break
+  }
+
+  return `translate(${xPos}px, ${yPos}px) translate(${xShift}%, ${yShift}%)`
+}
+
+const nodes = computed(() => {
+  const nodeIds = Array.isArray(props.nodeId) ? props.nodeId : [props.nodeId || contextNodeId || '']
+
+  return nodeIds.reduce<GraphNode[]>((acc, id) => {
+    const node = findNode(id)
+
+    if (node) {
+      acc.push(node)
+    }
+
+    return acc
+  }, [] as GraphNode[])
+})
+
+const isActive = computed(() =>
+  typeof props.isVisible === 'boolean'
+    ? props.isVisible
+    : nodes.value.length === 1 && nodes.value[0].selected && getSelectedNodes.value.length === 1,
+)
+
+const nodeRect = computed<Rect>(() => getRectOfNodes(nodes.value))
+
+const zIndex = computed<number>(() => Math.max(...nodes.value.map((node) => (node.computedPosition.z || 1) + 1)))
+
+const wrapperStyle = computed<CSSProperties>(() => ({
+  position: 'absolute',
+  transform: getTransform(nodeRect.value, viewport.value, props.position, props.offset),
+  zIndex: zIndex.value,
+}))
+</script>
+
+<script lang="ts">
+export default {
+  name: 'NodeToolbar',
+  inheritAttrs: false,
+}
+</script>
+
+<template>
+  <Teleport :to="viewportRef">
+    <div v-if="isActive && nodes.length" v-bind="$attrs" :style="wrapperStyle" class="vue-flow__node-toolbar">
+      <slot />
+    </div>
+  </Teleport>
+</template>

packages/background/src/index.ts

@@ -0,0 +1,2 @@
+export { default as Background } from './Background.vue'
+export * from './types'

packages/background/src/types.ts

@@ -0,0 +1,25 @@
+export enum BackgroundVariant {
+  Lines = 'lines',
+  Dots = 'dots',
+}
+
+export interface BackgroundProps {
+  /** The background pattern variant, {@link BackgroundVariant} */
+  variant?: BackgroundVariant
+  /** Background pattern gap */
+  gap?: number
+  /** Background pattern size */
+  size?: number
+  /** Background pattern color */
+  patternColor?: string
+  /** Background color */
+  bgColor?: string
+  /** Background height */
+  height?: number
+  /** Background width */
+  width?: number
+  /** Background x-coordinate (offset x) */
+  x?: number
+  /** Background y-coordinate (offset y) */
+  y?: number
+}