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import type { Radians } from "@excalidraw/math";
import { pointFrom, pointRotateRads } from "@excalidraw/math";
import {
bindOrUnbindLinearElements,
updateBoundElements,
} from "../../element/binding";
import { mutateElement } from "../../element/mutateElement";
import { getBoundTextElement } from "../../element/textElement";
import {
isFrameLikeElement,
isLinearElement,
isTextElement,
} from "../../element/typeChecks";
import type {
ElementsMap,
ExcalidrawElement,
NonDeletedExcalidrawElement,
NonDeletedSceneElementsMap,
} from "../../element/types";
import {
getSelectedGroupIds,
getElementsInGroup,
isInGroup,
} from "../../groups";
import type Scene from "../../scene/Scene";
import type { AppState } from "../../types";
export type StatsInputProperty =
| "x"
| "y"
| "width"
| "height"
| "angle"
| "fontSize"
| "gridStep";
export const SMALLEST_DELTA = 0.01;
export const isPropertyEditable = (
element: ExcalidrawElement,
property: keyof ExcalidrawElement,
) => {
if (property === "height" && isTextElement(element)) {
return false;
}
if (property === "width" && isTextElement(element)) {
return false;
}
if (property === "angle" && isFrameLikeElement(element)) {
return false;
}
return true;
};
export const getStepSizedValue = (value: number, stepSize: number) => {
const v = value + stepSize / 2;
return v - (v % stepSize);
};
export type AtomicUnit = Record<string, true>;
export const getElementsInAtomicUnit = (
atomicUnit: AtomicUnit,
elementsMap: ElementsMap,
originalElementsMap?: ElementsMap,
) => {
return Object.keys(atomicUnit)
.map((id) => ({
original: (originalElementsMap ?? elementsMap).get(id),
latest: elementsMap.get(id),
}))
.filter((el) => el.original !== undefined && el.latest !== undefined) as {
original: NonDeletedExcalidrawElement;
latest: NonDeletedExcalidrawElement;
}[];
};
export const newOrigin = (
x1: number,
y1: number,
w1: number,
h1: number,
w2: number,
h2: number,
angle: number,
) => {
/**
* The formula below is the result of solving
* rotate(x1, y1, cx1, cy1, angle) = rotate(x2, y2, cx2, cy2, angle)
* where rotate is the function defined in math.ts
*
* This is so that the new origin (x2, y2),
* when rotated against the new center (cx2, cy2),
* coincides with (x1, y1) rotated against (cx1, cy1)
*
* The reason for doing this computation is so the element's top left corner
* on the canvas remains fixed after any changes in its dimension.
*/
return {
x:
x1 +
(w1 - w2) / 2 +
((w2 - w1) / 2) * Math.cos(angle) +
((h1 - h2) / 2) * Math.sin(angle),
y:
y1 +
(h1 - h2) / 2 +
((w2 - w1) / 2) * Math.sin(angle) +
((h2 - h1) / 2) * Math.cos(angle),
};
};
export const moveElement = (
newTopLeftX: number,
newTopLeftY: number,
originalElement: ExcalidrawElement,
elementsMap: NonDeletedSceneElementsMap,
elements: readonly NonDeletedExcalidrawElement[],
scene: Scene,
originalElementsMap: ElementsMap,
shouldInformMutation = true,
) => {
const latestElement = elementsMap.get(originalElement.id);
if (!latestElement) {
return;
}
const [cx, cy] = [
originalElement.x + originalElement.width / 2,
originalElement.y + originalElement.height / 2,
];
const [topLeftX, topLeftY] = pointRotateRads(
pointFrom(originalElement.x, originalElement.y),
pointFrom(cx, cy),
originalElement.angle,
);
const changeInX = newTopLeftX - topLeftX;
const changeInY = newTopLeftY - topLeftY;
const [x, y] = pointRotateRads(
pointFrom(newTopLeftX, newTopLeftY),
pointFrom(cx + changeInX, cy + changeInY),
-originalElement.angle as Radians,
);
mutateElement(
latestElement,
{
x,
y,
},
shouldInformMutation,
);
updateBindings(latestElement, elementsMap, elements, scene);
const boundTextElement = getBoundTextElement(
originalElement,
originalElementsMap,
);
if (boundTextElement) {
const latestBoundTextElement = elementsMap.get(boundTextElement.id);
latestBoundTextElement &&
mutateElement(
latestBoundTextElement,
{
x: boundTextElement.x + changeInX,
y: boundTextElement.y + changeInY,
},
shouldInformMutation,
);
}
};
export const getAtomicUnits = (
targetElements: readonly ExcalidrawElement[],
appState: AppState,
) => {
const selectedGroupIds = getSelectedGroupIds(appState);
const _atomicUnits = selectedGroupIds.map((gid) => {
return getElementsInGroup(targetElements, gid).reduce((acc, el) => {
acc[el.id] = true;
return acc;
}, {} as AtomicUnit);
});
targetElements
.filter((el) => !isInGroup(el))
.forEach((el) => {
_atomicUnits.push({
[el.id]: true,
});
});
return _atomicUnits;
};
export const updateBindings = (
latestElement: ExcalidrawElement,
elementsMap: NonDeletedSceneElementsMap,
elements: readonly NonDeletedExcalidrawElement[],
scene: Scene,
options?: {
simultaneouslyUpdated?: readonly ExcalidrawElement[];
newSize?: { width: number; height: number };
zoom?: AppState["zoom"];
},
) => {
if (isLinearElement(latestElement)) {
bindOrUnbindLinearElements(
[latestElement],
elementsMap,
elements,
scene,
true,
[],
options?.zoom,
);
} else {
updateBoundElements(latestElement, elementsMap, options);
}
};
|
