138 lines
4.5 KiB
Vue
138 lines
4.5 KiB
Vue
<script setup>
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import { ref, computed, watch, nextTick } from 'vue'
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import { VueFlow, useVueFlow, Handle, Position, MarkerType } from '@vue-flow/core'
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import '@vue-flow/core/dist/style.css'
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import dagre from '@dagrejs/dagre'
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import { renderMarkdownInline } from '../markdown.js'
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// Grafik = {knoten:[{id,text}], kanten:[{von,nach,text?}], richtung:'TB'|'LR'}.
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// KI liefert nur die Semantik; Layout macht dagre, Mathe rendert KaTeX im Knoten.
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const props = defineProps({
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graph: { type: Object, default: null },
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height: { type: String, default: '380px' },
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})
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let _seq = 0
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const flowId = `gv-${++_seq}-${Math.floor(performance.now())}`
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const { findNode, fitView, onNodesInitialized } = useVueFlow(flowId)
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const nodes = ref([])
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const edges = ref([])
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const bereit = ref(false) // erst nach dem Layout sichtbar (sonst kurz bei 0,0 gestapelt)
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const fehler = ref(false)
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const richtung = computed(() => (props.graph?.richtung === 'LR' ? 'LR' : 'TB'))
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const istLR = computed(() => richtung.value === 'LR')
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const targetPos = computed(() => (istLR.value ? Position.Left : Position.Top))
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const sourcePos = computed(() => (istLR.value ? Position.Right : Position.Bottom))
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function build() {
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bereit.value = false
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const g = props.graph
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const kn = g && Array.isArray(g.knoten) ? g.knoten : []
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if (!kn.length) {
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fehler.value = true
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nodes.value = []
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edges.value = []
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return
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}
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fehler.value = false
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const ids = new Set(kn.map((k) => String(k.id)))
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nodes.value = kn.map((k) => ({
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id: String(k.id),
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type: 'math',
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position: { x: 0, y: 0 },
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data: { text: String(k.text || '') },
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}))
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edges.value = (g.kanten || [])
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.filter((e) => ids.has(String(e.von)) && ids.has(String(e.nach)))
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.map((e, i) => ({
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id: `e${i}`,
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source: String(e.von),
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target: String(e.nach),
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label: e.text ? String(e.text) : undefined,
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type: 'smoothstep',
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markerEnd: MarkerType.ArrowClosed,
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}))
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}
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// Two-Pass: Vue Flow misst die Knoten (KaTeX!), erst dann rechnet dagre das Layout.
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function layout() {
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const g = new dagre.graphlib.Graph()
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g.setDefaultEdgeLabel(() => ({}))
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g.setGraph({ rankdir: richtung.value, nodesep: 40, ranksep: 55 })
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for (const n of nodes.value) {
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const dim = findNode(n.id)?.dimensions
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g.setNode(n.id, { width: dim?.width || 160, height: dim?.height || 40 })
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}
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for (const e of edges.value) g.setEdge(e.source, e.target)
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dagre.layout(g)
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nodes.value = nodes.value.map((n) => {
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const p = g.node(n.id)
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return { ...n, position: { x: p.x - p.width / 2, y: p.y - p.height / 2 } }
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})
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}
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onNodesInitialized(async () => {
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if (!nodes.value.length) return
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await document.fonts.ready // sonst misst der Browser Fallback-Font → falsche Breite
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layout()
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bereit.value = true
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await nextTick()
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fitView({ padding: 0.2 })
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})
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watch(() => props.graph, build, { immediate: true })
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</script>
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<template>
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<div class="graph-view" :style="{ height }">
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<p v-if="fehler" class="graph-fallback">Grafik nicht verfügbar — Bausteine ab „Grafiken" neu bauen.</p>
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<VueFlow
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v-else
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:id="flowId"
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:nodes="nodes"
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:edges="edges"
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:style="{ opacity: bereit ? 1 : 0 }"
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:nodes-draggable="false"
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:nodes-connectable="false"
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:elements-selectable="false"
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:zoom-on-scroll="false"
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:zoom-on-double-click="false"
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:min-zoom="0.2"
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:max-zoom="2"
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fit-view-on-init
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>
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<template #node-math="{ data }">
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<Handle type="target" :position="targetPos" />
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<div class="gv-node markdown" v-html="renderMarkdownInline(data.text)"></div>
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<Handle type="source" :position="sourcePos" />
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</template>
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</VueFlow>
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</div>
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</template>
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<style scoped>
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.graph-view { width: 100%; position: relative; }
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.graph-fallback { color: var(--text-muted); font-size: 0.85rem; padding: 1rem 0; }
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.gv-node {
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padding: 0.4rem 0.65rem;
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border: 1px solid var(--border-strong, #999);
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border-radius: 8px;
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background: var(--panel, #fff);
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color: var(--text, #111);
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font-size: 0.8rem;
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line-height: 1.35;
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text-align: center;
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max-width: 300px;
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/* Langer Text/Formel umbricht, statt im Knoten abgeschnitten zu werden. */
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white-space: normal;
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overflow-wrap: anywhere;
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}
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/* KaTeX im Knoten umbrechen lassen + geerbtes Klippen (markdown .katex-display) neutralisieren. */
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.gv-node :deep(.katex) { white-space: normal; }
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.gv-node :deep(.katex-display) { overflow: visible; margin: 0; }
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.graph-view :deep(.vue-flow__edge-text) { font-size: 0.72rem; fill: var(--text-muted, #666); }
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.graph-view :deep(.vue-flow__edge-textbg) { fill: var(--panel, #fff); }
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</style>
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