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<script lang="ts">
type Props = {
label?: string;
max?: number;
min?: number;
onDrag: (dx: number, dy: number) => void;
onDragEnd?: () => void;
onDragStart?: () => void;
onKeyAdjust?: (delta: number) => void;
orientation: "horizontal" | "vertical";
value?: number;
};
let {
label,
max,
min,
onDrag,
onDragEnd,
onDragStart,
onKeyAdjust,
orientation,
value
}: Props = $props();
let dragging = $state(false);
let startX = $state(0);
let startY = $state(0);
function onPointerDown(event: PointerEvent) {
event.preventDefault();
dragging = true;
startX = event.clientX;
startY = event.clientY;
event.currentTarget instanceof Element &&
event.currentTarget.setPointerCapture(event.pointerId);
onDragStart?.();
}
function onPointerMove(event: PointerEvent) {
if (!dragging)
return;
onDrag(event.clientX - startX, event.clientY - startY);
}
function onPointerUp(event: PointerEvent) {
if (!dragging)
return;
dragging = false;
event.currentTarget instanceof Element &&
event.currentTarget.releasePointerCapture(event.pointerId);
onDragEnd?.();
}
function onKeydown(event: KeyboardEvent) {
if (!onKeyAdjust)
return;
if (orientation === "horizontal") {
if (event.key === "ArrowLeft") {
event.preventDefault();
onKeyAdjust(-16);
} else if (event.key === "ArrowRight") {
event.preventDefault();
onKeyAdjust(16);
}
} else {
if (event.key === "ArrowUp") {
event.preventDefault();
onKeyAdjust(-16);
} else if (event.key === "ArrowDown") {
event.preventDefault();
onKeyAdjust(16);
}
}
}
</script>
<style lang="scss">
.splitter {
align-items: center;
background: transparent;
display: flex;
justify-content: center;
position: relative;
touch-action: none;
user-select: none;
&:hover::after,
&.dragging::after {
background: var(--graphiql-accent, #0e639c);
}
&::after {
background: var(--graphiql-border, #333);
content: "";
position: absolute;
transition: background 120ms ease;
}
&.horizontal {
cursor: col-resize;
height: 100%;
width: 6px;
&::after {
height: 100%;
width: 1px;
}
}
&.vertical {
cursor: row-resize;
height: 6px;
width: 100%;
&::after {
height: 1px;
width: 100%;
}
}
}
</style>
<!-- svelte-ignore a11y_no_noninteractive_tabindex -->
<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
<div
aria-label={label}
aria-orientation={orientation}
aria-valuemax={max}
aria-valuemin={min}
aria-valuenow={value}
class="splitter {orientation}"
class:dragging
onkeydown={onKeydown}
onpointerdown={onPointerDown}
onpointermove={onPointerMove}
onpointerup={onPointerUp}
role="separator"
tabindex="0"
></div>
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