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import styled from "styled-components";
import { MAX_SCENE_TILE_COUNT, TILE_SIZE } from "consts";
import { useAppDispatch } from "store/hooks";
import entitiesActions from "store/features/entities/entitiesActions";
export type ResizeEdge = "top" | "right" | "bottom" | "left";
export interface ResizeGeometry {
x: number;
y: number;
width: number;
height: number;
shiftX: number;
shiftY: number;
}
export interface ResizeStart extends ResizeGeometry {
edge: ResizeEdge;
pageX: number;
pageY: number;
preview: ResizeGeometry;
}
const HANDLE_SIZE = 5;
const MIN_WIDTH = 20;
const MIN_HEIGHT = 18;
const MAX_SIZE = 255;
const Handle = styled.div<{ $edge: ResizeEdge }>`
position: absolute;
z-index: 300;
background: ${(props) => props.theme.colors.highlight};
opacity: 0;
${(props) =>
props.$edge === "left" || props.$edge === "right"
? `
top: 0;
bottom: 0;
width: ${HANDLE_SIZE}px;
${props.$edge}: -${HANDLE_SIZE}px;
cursor: ew-resize;
`
: `
left: 0;
right: 0;
height: ${HANDLE_SIZE}px;
${props.$edge}: -${HANDLE_SIZE}px;
cursor: ns-resize;
`}
&:hover {
opacity: 0.5;
outline: 2px solid ${(props) => props.theme.colors.highlight};
}
`;
const Preview = styled.div`
display: flex;
align-items: center;
justify-content: center;
position: absolute;
z-index: 250;
pointer-events: none;
box-sizing: border-box;
border: 2px solid ${(props) => props.theme.colors.highlight};
span {
position: relative;
border-radius: 40px;
padding: 5px 10px;
background: ${(props) => props.theme.colors.highlight};
color: ${(props) => props.theme.colors.highlightText};
}
&:before {
content: "";
display: block;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
width: 100%;
height: 100%;
background: ${(props) => props.theme.colors.highlight};
opacity: 0.3;
}
`;
export const resizeGeometry = (
start: ResizeStart,
pageX: number,
pageY: number,
zoomRatio: number,
): ResizeGeometry => {
const deltaX = Math.round((pageX - start.pageX) / zoomRatio / TILE_SIZE);
const deltaY = Math.round((pageY - start.pageY) / zoomRatio / TILE_SIZE);
let nextX = start.x;
let nextY = start.y;
let nextWidth = start.width;
let nextHeight = start.height;
let shiftX = 0;
let shiftY = 0;
if (start.edge === "left" || start.edge === "right") {
const maxWidth = Math.min(
MAX_SIZE,
Math.floor(MAX_SCENE_TILE_COUNT / start.height),
);
nextWidth = Math.max(
MIN_WIDTH,
Math.min(
maxWidth,
start.width + (start.edge === "left" ? -deltaX : deltaX),
),
);
if (start.edge === "left") {
const delta = start.width - nextWidth;
nextX = start.x + delta * TILE_SIZE;
shiftX = -delta;
}
} else {
const maxHeight = Math.min(
MAX_SIZE,
Math.floor(MAX_SCENE_TILE_COUNT / start.width),
);
nextHeight = Math.max(
MIN_HEIGHT,
Math.min(
maxHeight,
start.height + (start.edge === "top" ? -deltaY : deltaY),
),
);
if (start.edge === "top") {
const delta = start.height - nextHeight;
nextY = start.y + delta * TILE_SIZE;
shiftY = -delta;
}
}
return {
x: nextX,
y: nextY,
width: nextWidth,
height: nextHeight,
shiftX,
shiftY,
};
};
interface SceneResizeHandlesProps {
sceneId: string;
x: number;
y: number;
width: number;
height: number;
zoomRatio: number;
}
const SceneResizeHandles = ({
sceneId,
x,
y,
width,
height,
zoomRatio,
}: SceneResizeHandlesProps) => {
const dispatch = useAppDispatch();
const drag = useRef<ResizeStart | undefined>(undefined);
const [preview, setPreview] = useState<ResizeGeometry>();
const commitResize = useCallback(() => {
const next = drag.current?.preview;
Iif (!next) {
return;
}
Eif (
next.x !== x ||
next.y !== y ||
next.width !== width ||
next.height !== height
) {
dispatch(
entitiesActions.resizeTilemapLayers({
sceneId,
...next,
resizeAxis:
drag.current?.edge === "left" || drag.current?.edge === "right"
? "width"
: "height",
}),
);
}
}, [dispatch, height, sceneId, width, x, y]);
const onMouseMove = useCallback(
(e: MouseEvent) => {
Eif (drag.current) {
const next = resizeGeometry(drag.current, e.pageX, e.pageY, zoomRatio);
drag.current.preview = next;
setPreview(next);
}
},
[zoomRatio],
);
const onMouseUp = useCallback(() => {
Eif (drag.current) {
commitResize();
}
drag.current = undefined;
setPreview(undefined);
window.removeEventListener("mousemove", onMouseMove);
window.removeEventListener("mouseup", onMouseUp);
}, [commitResize, onMouseMove]);
useEffect(
() => () => {
window.removeEventListener("mousemove", onMouseMove);
window.removeEventListener("mouseup", onMouseUp);
},
[onMouseMove, onMouseUp],
);
const onMouseDown = useCallback(
(edge: ResizeEdge) => (e: React.MouseEvent<HTMLDivElement, MouseEvent>) => {
e.preventDefault();
e.stopPropagation();
drag.current = {
edge,
pageX: e.pageX,
pageY: e.pageY,
x,
y,
width,
height,
shiftX: 0,
shiftY: 0,
preview: { x, y, width, height, shiftX: 0, shiftY: 0 },
};
setPreview(drag.current.preview);
window.addEventListener("mousemove", onMouseMove);
window.addEventListener("mouseup", onMouseUp);
},
[height, onMouseMove, onMouseUp, width, x, y],
);
return (
<>
{preview && (
<Preview
style={{
left: preview.x - x,
top: preview.y - y,
width: preview.width * TILE_SIZE,
height: preview.height * TILE_SIZE,
}}
>
<span>
{preview.width} x {preview.height}
</span>
</Preview>
)}
{(["top", "right", "bottom", "left"] as ResizeEdge[]).map((edge) => (
<Handle
key={edge}
data-testid={`scene-resize-${edge}`}
$edge={edge}
onMouseDown={onMouseDown(edge)}
/>
))}
</>
);
};
export default SceneResizeHandles;
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