Files
next-ai-draw-io/stores/canvas-store.ts
T
dayuan.jiang 23d5c83b0d feat(ui): canvas-first redesign with a self-hosted draw.io
The canvas now fills the window and the chat floats on its right. draw.io is
served from our own origin (public/drawio, downloaded at build time and
checked against the release's SHA-256), so the app can drive the editor
directly:

- every AI change becomes a version card with a thumbnail; compare, restore
  or undo it, and Ctrl+Z on the canvas takes an AI change back in one step
- shapes the AI just changed are highlighted on the canvas
- selected shapes appear as a chip and are sent to the model
- the app's own canvas toolbar, shape library and page tabs replace
  draw.io's chrome
- new start screen, session rename and switcher, open .drawio files
- settings split into Models & keys, Appearance, Advanced and About
- phones switch between canvas and chat
- dark mode keeps the diagram on a white sheet and no longer flashes

With an external draw.io (NEXT_PUBLIC_DRAWIO_BASE_URL) the app falls back to
draw.io's own toolbar and the features above that need same origin are off.

The chat logic moved from the 1500-line chat panel into a chat engine plus
small UI components; zustand holds canvas, versions, settings and UI state.
2026-10-06 16:17:11 +09:00

55 lines
1.2 KiB
TypeScript

import { create } from "zustand"
export interface SelectedCell {
id: string
label: string
isEdge: boolean
}
/** Rectangle relative to the draw.io iframe's top-left corner */
export interface CanvasRect {
x: number
y: number
width: number
height: number
}
export interface CanvasPage {
id: string
name: string
}
interface CanvasState {
/** The page can call the draw.io editor directly (same-origin iframe) */
hasEditor: boolean
canUndo: boolean
canRedo: boolean
/** Zoom in percent */
zoom: number
pages: CanvasPage[]
currentPageId: string | null
selection: SelectedCell[]
selectionRect: CanvasRect | null
/** Freehand drawing is on */
isFreehand: boolean
/** The format (style) panel is open */
isFormatOpen: boolean
isShapesOpen: boolean
set: (partial: Partial<Omit<CanvasState, "set">>) => void
}
export const useCanvasStore = create<CanvasState>((set) => ({
hasEditor: false,
canUndo: false,
canRedo: false,
zoom: 100,
pages: [],
currentPageId: null,
selection: [],
selectionRect: null,
isFreehand: false,
isFormatOpen: false,
isShapesOpen: false,
set: (partial) => set(partial),
}))