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Add LLM chat history widget (#3907)
Co-authored-by: github-actions <[email protected]>
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‎src/components/graph/widgets/ChatHistoryWidget.vue

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<template>
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<ScrollPanel
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ref="scrollPanelRef"
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class="w-full min-h-[400px] rounded-lg px-2 py-2 text-xs"
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:pt="{ content: { id: 'chat-scroll-content' } }"
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>
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<div v-for="(item, i) in parsedHistory" :key="i" class="mb-4">
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<!-- Prompt (user, right) -->
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<span
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:class="{
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'opacity-40 pointer-events-none': editIndex !== null && i > editIndex
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}"
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>
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<div class="flex justify-end mb-1">
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<div
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class="bg-gray-300 dark-theme:bg-gray-800 rounded-xl px-4 py-1 max-w-[80%] text-right"
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>
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<div class="break-words text-[12px]">{{ item.prompt }}</div>
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</div>
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</div>
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<div class="flex justify-end mb-2 mr-1">
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<CopyButton :text="item.prompt" />
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<Button
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v-tooltip="
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editIndex === i ? $t('chatHistory.cancelEditTooltip') : null
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"
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text
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rounded
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class="!p-1 !h-4 !w-4 text-gray-400 hover:text-gray-600 dark-theme:hover:text-gray-200 transition"
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pt:icon:class="!text-xs"
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:icon="editIndex === i ? 'pi pi-times' : 'pi pi-pencil'"
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:aria-label="
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editIndex === i ? $t('chatHistory.cancelEdit') : $t('g.edit')
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"
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@click="editIndex === i ? handleCancelEdit() : handleEdit(i)"
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/>
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</div>
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</span>
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<!-- Response (LLM, left) -->
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<ResponseBlurb
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:text="item.response"
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:class="{
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'opacity-25 pointer-events-none': editIndex !== null && i >= editIndex
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}"
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>
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<div v-html="nl2br(linkifyHtml(item.response))" />
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</ResponseBlurb>
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</div>
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</ScrollPanel>
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</template>
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<script setup lang="ts">
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import Button from 'primevue/button'
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import ScrollPanel from 'primevue/scrollpanel'
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import { computed, nextTick, ref, watch } from 'vue'
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import CopyButton from '@/components/graph/widgets/chatHistory/CopyButton.vue'
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import ResponseBlurb from '@/components/graph/widgets/chatHistory/ResponseBlurb.vue'
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import { ComponentWidget } from '@/scripts/domWidget'
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import { linkifyHtml, nl2br } from '@/utils/formatUtil'
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const { widget, history = '[]' } = defineProps<{
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widget?: ComponentWidget<string>
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history: string
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}>()
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const editIndex = ref<number | null>(null)
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const scrollPanelRef = ref<InstanceType<typeof ScrollPanel> | null>(null)
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const parsedHistory = computed(() => JSON.parse(history || '[]'))
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const findPromptInput = () =>
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widget?.node.widgets?.find((w) => w.name === 'prompt')
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let promptInput = findPromptInput()
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const previousPromptInput = ref<string | null>(null)
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const getPreviousResponseId = (index: number) =>
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index > 0 ? parsedHistory.value[index - 1]?.response_id ?? '' : ''
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const storePromptInput = () => {
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promptInput ??= widget?.node.widgets?.find((w) => w.name === 'prompt')
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if (!promptInput) return
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previousPromptInput.value = String(promptInput.value)
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}
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const setPromptInput = (text: string, previousResponseId?: string | null) => {
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promptInput ??= widget?.node.widgets?.find((w) => w.name === 'prompt')
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if (!promptInput) return
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if (previousResponseId !== null) {
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promptInput.value = `<starting_point_id:${previousResponseId}>\n\n${text}`
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} else {
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promptInput.value = text
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}
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}
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const handleEdit = (index: number) => {
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if (!promptInput) return
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editIndex.value = index
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const prevResponseId = index === 0 ? 'start' : getPreviousResponseId(index)
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const promptText = parsedHistory.value[index]?.prompt ?? ''
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storePromptInput()
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setPromptInput(promptText, prevResponseId)
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}
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const resetEditingState = () => {
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editIndex.value = null
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}
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const handleCancelEdit = () => {
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resetEditingState()
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if (promptInput) {
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promptInput.value = previousPromptInput.value ?? ''
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}
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}
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const scrollChatToBottom = () => {
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const content = document.getElementById('chat-scroll-content')
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if (content) {
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content.scrollTo({ top: content.scrollHeight, behavior: 'smooth' })
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}
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}
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const onHistoryChanged = () => {
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resetEditingState()
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void nextTick(() => scrollChatToBottom())
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}
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watch(() => parsedHistory.value, onHistoryChanged, {
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immediate: true,
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deep: true
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})
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</script>

‎src/components/graph/widgets/DomWidget.vue

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v-if="isComponentWidget(widget)"
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:model-value="widget.value"
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:widget="widget"
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v-bind="widget.props"
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@update:model-value="emit('update:widgetValue', $event)"
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/>
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</div>

‎src/components/graph/widgets/chatHistory/CopyButton.vue

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<template>
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<Button
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v-tooltip="
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copied ? $t('chatHistory.copiedTooltip') : $t('chatHistory.copyTooltip')
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"
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text
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rounded
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class="!p-1 !h-4 !w-6 text-gray-400 hover:text-gray-600 dark-theme:hover:text-gray-200 transition"
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pt:icon:class="!text-xs"
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:icon="copied ? 'pi pi-check' : 'pi pi-copy'"
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:aria-label="
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copied ? $t('chatHistory.copiedTooltip') : $t('chatHistory.copyTooltip')
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"
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@click="handleCopy"
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/>
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</template>
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<script setup lang="ts">
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import Button from 'primevue/button'
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import { ref } from 'vue'
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const { text } = defineProps<{
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text: string
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}>()
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const copied = ref(false)
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const handleCopy = async () => {
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if (!text) return
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await navigator.clipboard.writeText(text)
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copied.value = true
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setTimeout(() => {
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copied.value = false
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}, 1024)
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}
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</script>

‎src/components/graph/widgets/chatHistory/ResponseBlurb.vue

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<template>
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<span>
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<div class="flex justify-start mb-1">
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<div class="rounded-xl px-4 py-1 max-w-[80%]">
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<div class="break-words text-[12px]">
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<slot />
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</div>
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</div>
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</div>
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<div class="flex justify-start ml-1">
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<CopyButton :text="text" />
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</div>
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</span>
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</template>
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<script setup lang="ts">
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import CopyButton from '@/components/graph/widgets/chatHistory/CopyButton.vue'
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defineProps<{
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text: string
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}>()
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</script>

‎src/composables/node/useNodeChatHistory.ts

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import { LGraphNode } from '@comfyorg/litegraph'
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import type ChatHistoryWidget from '@/components/graph/widgets/ChatHistoryWidget.vue'
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import { useChatHistoryWidget } from '@/composables/widgets/useChatHistoryWidget'
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const CHAT_HISTORY_WIDGET_NAME = '$$node-chat-history'
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/**
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* Composable for handling node text previews
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*/
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export function useNodeChatHistory(
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options: {
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minHeight?: number
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props?: Omit<InstanceType<typeof ChatHistoryWidget>['$props'], 'widget'>
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} = {}
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) {
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const chatHistoryWidget = useChatHistoryWidget(options)
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const findChatHistoryWidget = (node: LGraphNode) =>
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node.widgets?.find((w) => w.name === CHAT_HISTORY_WIDGET_NAME)
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const addChatHistoryWidget = (node: LGraphNode) =>
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chatHistoryWidget(node, {
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name: CHAT_HISTORY_WIDGET_NAME,
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type: 'chatHistory'
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})
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/**
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* Shows chat history for a node
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* @param node The graph node to show the chat history for
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*/
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function showChatHistory(node: LGraphNode) {
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if (!findChatHistoryWidget(node)) {
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addChatHistoryWidget(node)
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}
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node.setDirtyCanvas?.(true)
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}
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/**
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* Removes chat history from a node
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* @param node The graph node to remove the chat history from
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*/
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function removeChatHistory(node: LGraphNode) {
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if (!node.widgets) return
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const widgetIdx = node.widgets.findIndex(
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(w) => w.name === CHAT_HISTORY_WIDGET_NAME
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)
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if (widgetIdx > -1) {
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node.widgets[widgetIdx].onRemove?.()
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node.widgets.splice(widgetIdx, 1)
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}
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}
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return {
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showChatHistory,
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removeChatHistory
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}
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}

‎src/composables/widgets/useChatHistoryWidget.ts

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import type { LGraphNode } from '@comfyorg/litegraph'
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import { ref } from 'vue'
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import ChatHistoryWidget from '@/components/graph/widgets/ChatHistoryWidget.vue'
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import type { InputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
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import { ComponentWidgetImpl, addWidget } from '@/scripts/domWidget'
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import type { ComfyWidgetConstructorV2 } from '@/scripts/widgets'
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const PADDING = 16
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export const useChatHistoryWidget = (
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options: {
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props?: Omit<InstanceType<typeof ChatHistoryWidget>['$props'], 'widget'>
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} = {}
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) => {
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const widgetConstructor: ComfyWidgetConstructorV2 = (
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node: LGraphNode,
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inputSpec: InputSpec
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) => {
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const widgetValue = ref<string>('')
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const widget = new ComponentWidgetImpl<
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string | object,
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InstanceType<typeof ChatHistoryWidget>['$props']
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>({
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node,
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name: inputSpec.name,
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component: ChatHistoryWidget,
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props: options.props,
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inputSpec,
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options: {
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getValue: () => widgetValue.value,
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setValue: (value: string | object) => {
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widgetValue.value = typeof value === 'string' ? value : String(value)
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},
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getMinHeight: () => 400 + PADDING
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}
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})
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addWidget(node, widget)
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return widget
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}
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return widgetConstructor
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}

‎src/composables/widgets/useProgressTextWidget.ts

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const PADDING = 16
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export const useTextPreviewWidget = () => {
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export const useTextPreviewWidget = (
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options: {
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minHeight?: number
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} = {}
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) => {
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const widgetConstructor: ComfyWidgetConstructorV2 = (
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node: LGraphNode,
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inputSpec: InputSpec
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setValue: (value: string | object) => {
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widgetValue.value = typeof value === 'string' ? value : String(value)
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},
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getMinHeight: () => 42 + PADDING
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getMinHeight: () => options.minHeight ?? 42 + PADDING
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}
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})
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addWidget(node, widget)

‎src/locales/en/main.json

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"learnMore": "Learn more",
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"amount": "Amount",
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"unknownError": "Unknown error",
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"title": "Title"
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"title": "Title",
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"edit": "Edit",
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"copy": "Copy"
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},
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"manager": {
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"title": "Custom Nodes Manager",
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"tooltip": "Execute to selected output nodes (Highlighted with orange border)",
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"disabledTooltip": "No output nodes selected"
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}
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},
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"chatHistory": {
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"cancelEdit": "Cancel",
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"editTooltip": "Edit message",
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"cancelEditTooltip": "Cancel edit",
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"copiedTooltip": "Copied",
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"copyTooltip": "Copy message to clipboard"
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}
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}

‎src/locales/es/main.json

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"title": "Crea una cuenta"
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}
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},
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"chatHistory": {
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"cancelEdit": "Cancelar",
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"cancelEditTooltip": "Cancelar edición",
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"copiedTooltip": "Copiado",
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"copyTooltip": "Copiar mensaje al portapapeles",
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"editTooltip": "Editar mensaje"
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},
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"clipboard": {
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"errorMessage": "Error al copiar al portapapeles",
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"errorNotSupported": "API del portapapeles no soportada en su navegador",
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"continue": "Continuar",
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"control_after_generate": "control después de generar",
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"control_before_generate": "control antes de generar",
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"copy": "Copiar",
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"copyToClipboard": "Copiar al portapapeles",
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"currentUser": "Usuario actual",
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"customize": "Personalizar",
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"disableAll": "Deshabilitar todo",
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"disabling": "Deshabilitando",
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"download": "Descargar",
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"edit": "Editar",
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"empty": "Vacío",
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"enableAll": "Habilitar todo",
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"enabled": "Habilitado",

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