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import { FRAME_TITLE_BAR_HEIGHT } from "@/components/Canvas/constants";
import { buildFixedZoneLayout, getComponentLabel } from "@/components/Canvas/fixedZoneLayout";
import { MenuBarZone } from "@/components/Canvas/MenuBarZone";
import { ToolBarZone } from "@/components/Canvas/ToolBarZone";
import { CanvasComponent } from "@/components/CanvasComponent";
import { useCanvasDragDrop } from "@/hooks/useCanvasDragDrop";
import { useCanvasZoomPan } from "@/hooks/useCanvasZoomPan";
import { ZOOM_DEFAULT } from "@/lib/constants";
import { clamp } from "@/lib/geometry";
import type { CanvasComponent as CanvasComponentModel } from "@/types/canvas";
interface CanvasProps {
frameWidth: number;
frameHeight: number;
frameTitle?: string;
frameBackgroundColor?: string;
components: CanvasComponentModel[];
selectedComponentId: string | null;
onSelectComponent: (id: string | null) => void;
onAddComponent: (component: CanvasComponentModel) => void;
onMoveComponent: (id: string, x: number, y: number) => void;
onResizeComponent: (
id: string,
updates: Pick<CanvasComponentModel, "x" | "y" | "width" | "height">,
) => void;
onComponentInteractionStart?: (id: string, mode: "move" | "resize") => void;
onComponentInteractionEnd?: (id: string, mode: "move" | "resize") => void;
}
interface PanelRenderContext {
absoluteX: number;
absoluteY: number;
width: number;
height: number;
}
function getOrderedPanelChildren(
panel: CanvasComponentModel,
componentsById: Map<string, CanvasComponentModel>,
allComponents: CanvasComponentModel[],
): CanvasComponentModel[] {
const orderedChildren: CanvasComponentModel[] = [];
const knownChildIds = new Set<string>();
for (const childId of panel.children ?? []) {
const child = componentsById.get(childId);
if (!child || knownChildIds.has(child.id)) {
continue;
}
orderedChildren.push(child);
knownChildIds.add(child.id);
}
const parentLinkedChildren = allComponents.filter(
(component) => component.parentId === panel.id && !knownChildIds.has(component.id),
);
return [...orderedChildren, ...parentLinkedChildren];
}
function resolveLocalPosition(
component: CanvasComponentModel,
parentContext: PanelRenderContext,
): { x: number; y: number } {
const safeWidth = Math.max(1, Math.round(component.width));
const safeHeight = Math.max(1, Math.round(component.height));
const safeParentWidth = Math.max(1, Math.round(parentContext.width));
const safeParentHeight = Math.max(1, Math.round(parentContext.height));
const rawOffsetX = Math.round(component.parentOffset?.x ?? component.x - parentContext.absoluteX);
const rawOffsetY = Math.round(component.parentOffset?.y ?? component.y - parentContext.absoluteY);
const boundedX = clamp(rawOffsetX, 0, Math.max(0, safeParentWidth - safeWidth));
const boundedY = clamp(rawOffsetY, 0, Math.max(0, safeParentHeight - safeHeight));
return { x: boundedX, y: boundedY };
}
export function Canvas({
frameWidth,
frameHeight,
frameTitle,
frameBackgroundColor,
components,
selectedComponentId,
onSelectComponent,
onAddComponent,
onMoveComponent,
onResizeComponent,
onComponentInteractionStart,
onComponentInteractionEnd,
}: CanvasProps) {
const viewportRef = useRef<HTMLDivElement | null>(null);
const [expandedMenuId, setExpandedMenuId] = useState<string | null>(null);
const {
zoom,
pan,
handleWheel,
handlePointerDown,
handlePointerMove,
handlePointerUp,
handleZoomIn,
handleZoomOut,
handleResetView,
} = useCanvasZoomPan();
const normalizedFrameWidth = Math.max(1, Math.round(frameWidth));
const normalizedFrameHeight = Math.max(FRAME_TITLE_BAR_HEIGHT + 1, Math.round(frameHeight));
const resolvedFrameBackgroundColor = frameBackgroundColor?.trim();
const { handleDrop, handleDragOver, isDragging } = useCanvasDragDrop({
viewportRef,
zoom,
pan: {
x: pan.x,
y: pan.y + FRAME_TITLE_BAR_HEIGHT * zoom,
},
components,
onAddComponent,
onSelectComponent,
});
const {
componentsById,
floatingComponents,
menuBarLayout,
northToolBarLayout,
southToolBarLayout,
westToolBarLayout,
eastToolBarLayout,
sideTopInset,
sideBottomInset,
} = useMemo(() => buildFixedZoneLayout(components), [components]);
const floatingComponentsById = useMemo(
() => new Map(floatingComponents.map((component) => [component.id, component])),
[floatingComponents],
);
const panelChildrenById = useMemo(() => {
const panelChildren = new Map<string, CanvasComponentModel[]>();
for (const component of floatingComponents) {
if (component.type !== "Panel") {
continue;
}
panelChildren.set(
component.id,
getOrderedPanelChildren(component, floatingComponentsById, floatingComponents),
);
}
return panelChildren;
}, [floatingComponents, floatingComponentsById]);
const nestedPanelChildIds = useMemo(() => {
const childIds = new Set<string>();
for (const children of panelChildrenById.values()) {
for (const child of children) {
childIds.add(child.id);
}
}
return childIds;
}, [panelChildrenById]);
const rootFloatingComponents = useMemo(
() => floatingComponents.filter((component) => !nestedPanelChildIds.has(component.id)),
[floatingComponents, nestedPanelChildIds],
);
useEffect(() => {
Eif (!expandedMenuId) {
return;
}
if (!components.some((component) => component.id === expandedMenuId)) {
setExpandedMenuId(null);
}
}, [components, expandedMenuId]);
const handleCanvasPointerDown = useCallback(
(event: React.PointerEvent<HTMLDivElement>) => {
if (
!(event.target as HTMLElement | null)?.closest(
"[data-canvas-component='true'], [data-canvas-fixed='true']",
)
) {
onSelectComponent(null);
setExpandedMenuId(null);
}
handlePointerDown(event);
},
[handlePointerDown, onSelectComponent],
);
const isDefaultView = zoom === ZOOM_DEFAULT && pan.x === 0 && pan.y === 0;
const renderFloatingComponent = useCallback(
(
component: CanvasComponentModel,
parentContext?: PanelRenderContext,
ancestry = new Set<string>(),
) => {
if (ancestry.has(component.id)) {
return null;
}
const safeWidth = Math.max(1, Math.round(component.width));
const safeHeight = Math.max(1, Math.round(component.height));
const nextAncestry = new Set(ancestry);
nextAncestry.add(component.id);
const localPosition = parentContext
? resolveLocalPosition(component, parentContext)
: { x: Math.round(component.x), y: Math.round(component.y) };
const absoluteX = parentContext ? parentContext.absoluteX + localPosition.x : localPosition.x;
const absoluteY = parentContext ? parentContext.absoluteY + localPosition.y : localPosition.y;
const renderedComponent: CanvasComponentModel = {
...component,
x: localPosition.x,
y: localPosition.y,
width: safeWidth,
height: safeHeight,
};
const handleMove = (id: string, nextX: number, nextY: number) => {
if (!parentContext) {
onMoveComponent(id, Math.round(nextX), Math.round(nextY));
return;
}
const maxLocalX = Math.max(0, Math.round(parentContext.width) - safeWidth);
const maxLocalY = Math.max(0, Math.round(parentContext.height) - safeHeight);
const boundedLocalX = clamp(Math.round(nextX), 0, maxLocalX);
const boundedLocalY = clamp(Math.round(nextY), 0, maxLocalY);
onMoveComponent(
id,
parentContext.absoluteX + boundedLocalX,
parentContext.absoluteY + boundedLocalY,
);
};
const handleResize = (
id: string,
updates: Pick<CanvasComponentModel, "x" | "y" | "width" | "height">,
) => {
if (!parentContext) {
onResizeComponent(id, {
x: Math.round(updates.x),
y: Math.round(updates.y),
width: Math.max(1, Math.round(updates.width)),
height: Math.max(1, Math.round(updates.height)),
});
return;
}
const safeParentWidth = Math.max(1, Math.round(parentContext.width));
const safeParentHeight = Math.max(1, Math.round(parentContext.height));
let boundedWidth = Math.min(Math.max(1, Math.round(updates.width)), safeParentWidth);
let boundedHeight = Math.min(Math.max(1, Math.round(updates.height)), safeParentHeight);
const maxLocalX = Math.max(0, safeParentWidth - boundedWidth);
const maxLocalY = Math.max(0, safeParentHeight - boundedHeight);
const boundedLocalX = clamp(Math.round(updates.x), 0, maxLocalX);
const boundedLocalY = clamp(Math.round(updates.y), 0, maxLocalY);
boundedWidth = Math.min(boundedWidth, Math.max(1, safeParentWidth - boundedLocalX));
boundedHeight = Math.min(boundedHeight, Math.max(1, safeParentHeight - boundedLocalY));
onResizeComponent(id, {
x: parentContext.absoluteX + boundedLocalX,
y: parentContext.absoluteY + boundedLocalY,
width: boundedWidth,
height: boundedHeight,
});
};
const nestedChildren =
component.type === "Panel"
? (panelChildrenById.get(component.id) ?? []).map((child) =>
renderFloatingComponent(
child,
{
absoluteX,
absoluteY,
width: safeWidth,
height: safeHeight,
},
nextAncestry,
),
)
: null;
return (
<CanvasComponent
key={component.id}
component={renderedComponent}
zoom={zoom}
isSelected={selectedComponentId === component.id}
onSelect={onSelectComponent}
onMove={handleMove}
onResize={handleResize}
onInteractionStart={onComponentInteractionStart}
onInteractionEnd={onComponentInteractionEnd}
>
{nestedChildren}
</CanvasComponent>
);
},
[
onMoveComponent,
onComponentInteractionEnd,
onComponentInteractionStart,
onResizeComponent,
onSelectComponent,
panelChildrenById,
selectedComponentId,
zoom,
],
);
return (
<section className="flex h-full min-h-0 flex-col" aria-label="Canvas panel">
<header className="flex items-center justify-between border-b border-vscode-panel-border px-3 py-2 text-xs text-muted-foreground">
<span>Canvas</span>
<div className="flex items-center gap-2">
<button
type="button"
className="rounded border border-vscode-panel-border px-2 py-0.5 hover:bg-accent"
onClick={handleZoomOut}
>
-
</button>
<span>{Math.round(zoom * 100)}%</span>
<button
type="button"
className="rounded border border-vscode-panel-border px-2 py-0.5 hover:bg-accent"
onClick={handleZoomIn}
>
+
</button>
<button
type="button"
className="rounded border border-vscode-panel-border px-2 py-0.5 hover:bg-accent disabled:cursor-not-allowed disabled:opacity-60"
onClick={handleResetView}
disabled={isDefaultView}
>
Reset View
</button>
</div>
</header>
<div
ref={viewportRef}
className={`relative min-h-0 flex-1 overflow-hidden ${isDragging ? "bg-[var(--canvas-drop-target)] outline-2 outline-[var(--canvas-selection)]" : "bg-vscode-background"}`}
onDragOver={handleDragOver}
onDrop={handleDrop}
onWheel={handleWheel}
onPointerDown={handleCanvasPointerDown}
onPointerMove={handlePointerMove}
onPointerUp={handlePointerUp}
onPointerCancel={handlePointerUp}
>
<div
className="absolute inset-0 origin-top-left"
style={{ transform: `translate(${pan.x}px, ${pan.y}px) scale(${zoom})` }}
>
<div
className="relative overflow-hidden rounded-md border border-vscode-panel-border bg-vscode-panel-background shadow-lg"
style={{ width: normalizedFrameWidth, height: normalizedFrameHeight }}
>
<div
className="pointer-events-none absolute inset-x-0 top-0 flex items-center justify-between border-b border-vscode-panel-border bg-vscode-panel-background px-3 text-[11px] text-muted-foreground"
style={{ height: FRAME_TITLE_BAR_HEIGHT }}
>
<div className="flex items-center gap-1.5">
<span className="h-2 w-2 rounded-full bg-muted-foreground/50" />
<span className="h-2 w-2 rounded-full bg-muted-foreground/40" />
<span className="h-2 w-2 rounded-full bg-muted-foreground/30" />
</div>
<span className="truncate">{`JFrame (${normalizedFrameWidth} × ${normalizedFrameHeight})`}</span>
<span className="truncate max-w-[45%] text-right">
{frameTitle && frameTitle.trim().length > 0 ? frameTitle : "MainWindow"}
</span>
</div>
<div
className="absolute inset-x-0 bottom-0 border-t border-vscode-panel-border bg-vscode-background"
style={
resolvedFrameBackgroundColor
? { top: FRAME_TITLE_BAR_HEIGHT, backgroundColor: resolvedFrameBackgroundColor }
: { top: FRAME_TITLE_BAR_HEIGHT }
}
>
<div className="relative h-full w-full overflow-hidden">
{rootFloatingComponents.map((component) => renderFloatingComponent(component))}
<MenuBarZone
menuBarLayout={menuBarLayout}
componentsById={componentsById}
components={components}
selectedComponentId={selectedComponentId}
expandedMenuId={expandedMenuId}
setExpandedMenuId={setExpandedMenuId}
onSelectComponent={onSelectComponent}
getComponentLabel={getComponentLabel}
/>
<ToolBarZone
northToolBarLayout={northToolBarLayout}
southToolBarLayout={southToolBarLayout}
westToolBarLayout={westToolBarLayout}
eastToolBarLayout={eastToolBarLayout}
sideTopInset={sideTopInset}
sideBottomInset={sideBottomInset}
componentsById={componentsById}
components={components}
selectedComponentId={selectedComponentId}
onSelectComponent={onSelectComponent}
getComponentLabel={getComponentLabel}
/>
</div>
</div>
</div>
</div>
</div>
</section>
);
}
|