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import { isTextElement, redrawTextBoundingBox } from "../../element";
import { mutateElement } from "../../element/mutateElement";
import { hasBoundTextElement } from "../../element/typeChecks";
import type {
ExcalidrawElement,
ExcalidrawTextElement,
NonDeletedSceneElementsMap,
} from "../../element/types";
import { isInGroup } from "../../groups";
import type Scene from "../../scene/Scene";
import { fontSizeIcon } from "../icons";
import StatsDragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
import { getStepSizedValue } from "./utils";
import type { AppState } from "../../types";
import { getBoundTextElement } from "../../element/textElement";
interface MultiFontSizeProps {
elements: readonly ExcalidrawElement[];
scene: Scene;
elementsMap: NonDeletedSceneElementsMap;
appState: AppState;
property: "fontSize";
}
const MIN_FONT_SIZE = 4;
const STEP_SIZE = 4;
const getApplicableTextElements = (
elements: readonly (ExcalidrawElement | undefined)[],
elementsMap: NonDeletedSceneElementsMap,
) =>
elements.reduce(
(acc: ExcalidrawTextElement[], el) => {
if (!el || isInGroup(el)) {
return acc;
}
if (isTextElement(el)) {
acc.push(el);
return acc;
}
if (hasBoundTextElement(el)) {
const boundTextElement = getBoundTextElement(el, elementsMap);
if (boundTextElement) {
acc.push(boundTextElement);
return acc;
}
}
return acc;
},
[],
);
const handleFontSizeChange: DragInputCallbackType<
MultiFontSizeProps["property"],
ExcalidrawTextElement
> = ({
accumulatedChange,
originalElements,
shouldChangeByStepSize,
nextValue,
scene,
}) => {
const elementsMap = scene.getNonDeletedElementsMap();
const latestTextElements = originalElements.map((el) =>
elementsMap.get(el.id),
) as ExcalidrawTextElement[];
let nextFontSize;
if (nextValue) {
nextFontSize = Math.max(Math.round(nextValue), MIN_FONT_SIZE);
for (const textElement of latestTextElements) {
mutateElement(
textElement,
{
fontSize: nextFontSize,
},
false,
);
redrawTextBoundingBox(
textElement,
scene.getContainerElement(textElement),
elementsMap,
false,
);
}
scene.triggerUpdate();
} else {
const originalTextElements = originalElements as ExcalidrawTextElement[];
for (let i = 0; i < latestTextElements.length; i++) {
const latestElement = latestTextElements[i];
const originalElement = originalTextElements[i];
const originalFontSize = Math.round(originalElement.fontSize);
const changeInFontSize = Math.round(accumulatedChange);
let nextFontSize = Math.max(
originalFontSize + changeInFontSize,
MIN_FONT_SIZE,
);
if (shouldChangeByStepSize) {
nextFontSize = getStepSizedValue(nextFontSize, STEP_SIZE);
}
mutateElement(
latestElement,
{
fontSize: nextFontSize,
},
false,
);
redrawTextBoundingBox(
latestElement,
scene.getContainerElement(latestElement),
elementsMap,
false,
);
}
scene.triggerUpdate();
}
};
const MultiFontSize = ({
elements,
scene,
appState,
property,
elementsMap,
}: MultiFontSizeProps) => {
const latestTextElements = getApplicableTextElements(elements, elementsMap);
if (!latestTextElements.length) {
return null;
}
const fontSizes = latestTextElements.map(
(textEl) => Math.round(textEl.fontSize * 10) / 10,
);
const value = new Set(fontSizes).size === 1 ? fontSizes[0] : "Mixed";
const editable = fontSizes.length > 0;
return (
<StatsDragInput
label="F"
icon={fontSizeIcon}
elements={latestTextElements}
dragInputCallback={handleFontSizeChange}
value={value}
editable={editable}
scene={scene}
property={property}
appState={appState}
/>
);
};
export default MultiFontSize;
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