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<script lang="ts">
import { createEventDispatcher } from "svelte";
import Handle from "./Handle.svelte";
import { type EditorContext } from "../ImageEditor.svelte";
import { clamp } from "../utils/pixi";
import { resize_and_reposition } from "./crop";
export let editor_box: EditorContext["editor_box"];
export let crop_constraint: number | null;
const dispatch = createEventDispatcher<{
crop_start: {
x: number;
y: number;
width: number;
height: number;
};
crop_continue: {
x: number;
y: number;
width: number;
height: number;
};
crop_end: {
x: number;
y: number;
width: number;
height: number;
};
}>();
let _height = $editor_box.child_height;
let _width = $editor_box.child_width;
let _top = $editor_box.child_top - $editor_box.parent_top;
let _left = $editor_box.child_left - $editor_box.parent_left;
let _right = $editor_box.child_right - $editor_box.parent_left;
let _bottom = 0;
let dragging = false;
export let w_p: number;
export let h_p: number;
export let l_p: number;
export let t_p: number;
const positions = ["tl", "br", "tr", "bl", "t", "b", "l", "r"] as const;
let finished: boolean;
let timer: NodeJS.Timeout;
let triggered = false;
$: {
if (dragging || position_drag) {
clearTimeout(timer);
finished = false;
} else {
set_finished_with_timeout_and_delay();
}
}
function set_finished_with_timeout_and_delay(): void {
if (timer) {
clearTimeout(timer);
}
timer = setTimeout(() => {
if (triggered) {
dispatch("crop_end", {
x: l_p,
y: t_p,
width: w_p,
height: h_p
});
triggered = false;
}
finished = true;
position_drag = false;
}, 1000);
}
function handle_change(
{
top,
bottom,
left,
right
}: {
top: number | undefined;
bottom: number | undefined;
left: number | undefined;
right: number | undefined;
},
position: (typeof positions)[number]
): void {
_top = clamp(
top ? top - $editor_box.parent_top : _top,
$editor_box.child_top - $editor_box.parent_top,
$editor_box.child_bottom - $editor_box.parent_top
);
_left = clamp(
left ? left - $editor_box.parent_left : _left,
$editor_box.child_left - $editor_box.parent_left,
$editor_box.child_right - $editor_box.parent_left
);
_right = clamp(
right ? right - $editor_box.parent_left : _right,
$editor_box.child_left - $editor_box.parent_left,
$editor_box.child_right - $editor_box.parent_left
);
_bottom = clamp(
bottom ? bottom - $editor_box.parent_top : _bottom,
$editor_box.child_top - $editor_box.parent_top,
$editor_box.child_bottom - $editor_box.parent_top
);
_width = clamp(
right ? right - _left - $editor_box.parent_left : _width,
0,
_right - _left
);
_width = clamp(
left ? _right - left + $editor_box.parent_left : _width,
0,
_right - _left
);
_height = clamp(
bottom ? bottom - _top - $editor_box.parent_top : _height,
0,
_bottom - _top
);
_height = clamp(
top ? _bottom - top + $editor_box.parent_top : _height,
0,
_bottom - _top
);
const anchors_for_position = {
tl: "br",
tr: "bl",
bl: "tr",
br: "tl",
t: "b",
b: "t",
l: "r",
r: "l",
c: "c"
} as const;
if (crop_constraint) {
const max_w = ["t", "b"].includes(position)
? $editor_box.child_width
: _right - _left;
const max_h = ["l", "r"].includes(position)
? $editor_box.child_height
: _bottom - _top;
let result = resize_and_reposition(
_width,
_height,
anchors_for_position[position],
crop_constraint,
max_w,
max_h
);
_width = result.new_width;
_height = result.new_height;
_left = _left + result.x_offset;
_top = _top + result.y_offset;
_right = _left + _width;
_bottom = _top + _height;
}
w_p = _width / $editor_box.child_width;
h_p = _height / $editor_box.child_height;
l_p =
(_left - $editor_box.child_left + $editor_box.parent_left) /
$editor_box.child_width;
t_p =
(_top - $editor_box.child_top + $editor_box.parent_top) /
$editor_box.child_height;
dispatch(triggered ? "crop_continue" : "crop_start", {
x: l_p,
y: t_p,
width: w_p,
height: h_p
});
triggered = true;
}
function resize(): void {
_width = w_p * $editor_box.child_width;
_height = h_p * $editor_box.child_height;
_left =
l_p * $editor_box.child_width +
($editor_box.child_left - $editor_box.parent_left);
_top =
t_p * $editor_box.child_height +
($editor_box.child_top - $editor_box.parent_top);
_right = _left + _width;
_bottom = _top + _height;
}
$: $editor_box && resize();
let start_x = 0;
let start_y = 0;
let position_drag = false;
function handle_drag_start(e: MouseEvent): void {
position_drag = true;
start_x = e.clientX;
start_y = e.clientY;
if (!finished) return;
finished = false;
dispatch("crop_start", {
x: l_p,
y: t_p,
width: w_p,
height: h_p
});
}
function handle_drag_end(e: MouseEvent): void {
if (!position_drag) return;
position_drag = false;
}
function handle_dragging(e: MouseEvent): void {
if (!position_drag) return;
const x_delta = e.clientX - start_x;
const y_delta = e.clientY - start_y;
_left = clamp(
_left + x_delta,
$editor_box.child_left - $editor_box.parent_left,
$editor_box.child_right - $editor_box.parent_left - _width
);
_top = clamp(
_top + y_delta,
$editor_box.child_top - $editor_box.parent_top,
$editor_box.child_bottom - $editor_box.parent_top - _height
);
_right = _left + _width;
_bottom = _top + _height;
l_p =
(_left - $editor_box.child_left + $editor_box.parent_left) /
$editor_box.child_width;
t_p =
(_top - $editor_box.child_top + $editor_box.parent_top) /
$editor_box.child_height;
start_x = e.clientX;
start_y = e.clientY;
dispatch("crop_continue", {
x: l_p,
y: t_p,
width: w_p,
height: h_p
});
triggered = true;
}
</script>
<svelte:window on:mousemove={handle_dragging} on:mouseup={handle_drag_end} />
<div class="wrap">
<div
class="box"
style:width="{_width}px"
style:height="{_height}px"
style:top="{_top}px"
style:left="{_left}px"
>
{#each positions as position}
<Handle
on:change={({ detail }) => handle_change(detail, position)}
bind:dragging
location={position}
/>
{/each}
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div class="grid" class:finished on:mousedown={handle_drag_start}>
{#each { length: 25 } as _}
<div></div>
{/each}
</div>
</div>
</div>
<style>
.grid {
height: 100%;
width: 100%;
display: grid;
grid-template-rows: 1fr 1px 1fr 1px 1fr;
grid-template-columns: 1fr 1px 1fr 1px 1fr;
overflow: hidden;
transition: 0.2s;
opacity: 1;
/* pointer-events: none; */
}
.grid.finished {
opacity: 0;
}
.grid > div {
width: 100%;
height: 100%;
}
.grid > div:nth-of-type(even) {
background: black;
opacity: 0.5;
}
.wrap {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
/* transform: translateY(-20px); */
}
.box {
position: absolute;
width: 100%;
height: 100%;
border: 1px solid black;
z-index: var(--layer-top);
}
</style>
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