46a61ad4df
* feat: enable midpoint inside linear element editor * fix * fix * hack to set pointerDownState.hit.hasHitElementInside when mid point added * remove hacks as not needed :) * remove newline * fix * add doc
1096 lines
30 KiB
TypeScript
1096 lines
30 KiB
TypeScript
import { RoughCanvas } from "roughjs/bin/canvas";
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import { RoughSVG } from "roughjs/bin/svg";
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import oc from "open-color";
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import { AppState, BinaryFiles, Point, Zoom } from "../types";
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import {
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ExcalidrawElement,
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NonDeletedExcalidrawElement,
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ExcalidrawLinearElement,
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NonDeleted,
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GroupId,
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ExcalidrawBindableElement,
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} from "../element/types";
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import {
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getElementAbsoluteCoords,
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OMIT_SIDES_FOR_MULTIPLE_ELEMENTS,
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getTransformHandlesFromCoords,
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getTransformHandles,
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getElementBounds,
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getCommonBounds,
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} from "../element";
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import { roundRect } from "./roundRect";
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import { RenderConfig } from "../scene/types";
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import {
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getScrollBars,
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SCROLLBAR_COLOR,
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SCROLLBAR_WIDTH,
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} from "../scene/scrollbars";
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import { getSelectedElements } from "../scene/selection";
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import { renderElement, renderElementToSvg } from "./renderElement";
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import { getClientColors } from "../clients";
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import { LinearElementEditor } from "../element/linearElementEditor";
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import {
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isSelectedViaGroup,
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getSelectedGroupIds,
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getElementsInGroup,
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} from "../groups";
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import { maxBindingGap } from "../element/collision";
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import {
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SuggestedBinding,
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SuggestedPointBinding,
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isBindingEnabled,
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} from "../element/binding";
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import {
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shouldShowBoundingBox,
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TransformHandles,
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TransformHandleType,
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} from "../element/transformHandles";
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import {
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viewportCoordsToSceneCoords,
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supportsEmoji,
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throttleRAF,
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} from "../utils";
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import { UserIdleState } from "../types";
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import { THEME_FILTER } from "../constants";
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import {
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EXTERNAL_LINK_IMG,
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getLinkHandleFromCoords,
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} from "../element/Hyperlink";
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import { isLinearElement } from "../element/typeChecks";
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const hasEmojiSupport = supportsEmoji();
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export const DEFAULT_SPACING = 4;
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const strokeRectWithRotation = (
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context: CanvasRenderingContext2D,
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x: number,
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y: number,
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width: number,
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height: number,
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cx: number,
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cy: number,
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angle: number,
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fill: boolean = false,
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) => {
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context.save();
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context.translate(cx, cy);
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context.rotate(angle);
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if (fill) {
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context.fillRect(x - cx, y - cy, width, height);
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}
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context.strokeRect(x - cx, y - cy, width, height);
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context.restore();
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};
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const strokeDiamondWithRotation = (
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context: CanvasRenderingContext2D,
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width: number,
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height: number,
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cx: number,
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cy: number,
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angle: number,
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) => {
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context.save();
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context.translate(cx, cy);
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context.rotate(angle);
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context.beginPath();
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context.moveTo(0, height / 2);
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context.lineTo(width / 2, 0);
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context.lineTo(0, -height / 2);
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context.lineTo(-width / 2, 0);
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context.closePath();
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context.stroke();
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context.restore();
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};
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const strokeEllipseWithRotation = (
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context: CanvasRenderingContext2D,
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width: number,
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height: number,
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cx: number,
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cy: number,
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angle: number,
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) => {
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context.beginPath();
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context.ellipse(cx, cy, width / 2, height / 2, angle, 0, Math.PI * 2);
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context.stroke();
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};
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const fillCircle = (
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context: CanvasRenderingContext2D,
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cx: number,
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cy: number,
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radius: number,
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stroke = true,
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) => {
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context.beginPath();
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context.arc(cx, cy, radius, 0, Math.PI * 2);
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context.fill();
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if (stroke) {
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context.stroke();
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}
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};
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const strokeGrid = (
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context: CanvasRenderingContext2D,
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gridSize: number,
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offsetX: number,
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offsetY: number,
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width: number,
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height: number,
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) => {
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context.save();
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context.strokeStyle = "rgba(0,0,0,0.1)";
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context.beginPath();
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for (let x = offsetX; x < offsetX + width + gridSize * 2; x += gridSize) {
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context.moveTo(x, offsetY - gridSize);
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context.lineTo(x, offsetY + height + gridSize * 2);
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}
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for (let y = offsetY; y < offsetY + height + gridSize * 2; y += gridSize) {
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context.moveTo(offsetX - gridSize, y);
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context.lineTo(offsetX + width + gridSize * 2, y);
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}
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context.stroke();
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context.restore();
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};
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const renderSingleLinearPoint = (
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context: CanvasRenderingContext2D,
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appState: AppState,
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renderConfig: RenderConfig,
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point: Point,
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radius: number,
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isSelected: boolean,
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isPhantomPoint = false,
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) => {
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context.strokeStyle = "#5e5ad8";
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context.setLineDash([]);
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context.fillStyle = "rgba(255, 255, 255, 0.9)";
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if (isSelected) {
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context.fillStyle = "rgba(134, 131, 226, 0.9)";
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} else if (isPhantomPoint) {
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context.fillStyle = "rgba(177, 151, 252, 0.7)";
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}
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fillCircle(
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context,
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point[0],
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point[1],
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radius / renderConfig.zoom.value,
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!isPhantomPoint,
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);
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};
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const renderLinearPointHandles = (
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context: CanvasRenderingContext2D,
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appState: AppState,
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renderConfig: RenderConfig,
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element: NonDeleted<ExcalidrawLinearElement>,
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) => {
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if (!appState.selectedLinearElement) {
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return;
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}
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context.save();
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context.translate(renderConfig.scrollX, renderConfig.scrollY);
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context.lineWidth = 1 / renderConfig.zoom.value;
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const points = LinearElementEditor.getPointsGlobalCoordinates(element);
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const centerPoint = LinearElementEditor.getMidPoint(
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appState.selectedLinearElement,
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);
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if (!centerPoint) {
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return;
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}
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const { POINT_HANDLE_SIZE } = LinearElementEditor;
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const radius = appState.editingLinearElement
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? POINT_HANDLE_SIZE
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: POINT_HANDLE_SIZE / 2;
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points.forEach((point, idx) => {
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const isSelected =
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!!appState.editingLinearElement?.selectedPointsIndices?.includes(idx);
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renderSingleLinearPoint(
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context,
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appState,
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renderConfig,
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point,
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radius,
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isSelected,
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);
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});
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if (points.length < 3) {
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if (appState.selectedLinearElement.midPointHovered) {
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const centerPoint = LinearElementEditor.getMidPoint(
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appState.selectedLinearElement,
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)!;
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// The order of renderingSingleLinearPoint and highLight points is different
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// inside vs outside editor as hover states are different,
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// in editor when hovered the original point is not visible as hover state fully covers it whereas outside the
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// editor original point is visible and hover state is just an outer circle.
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if (appState.editingLinearElement) {
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renderSingleLinearPoint(
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context,
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appState,
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renderConfig,
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centerPoint,
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radius,
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false,
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);
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highlightPoint(centerPoint, context, renderConfig);
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} else {
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highlightPoint(centerPoint, context, renderConfig);
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renderSingleLinearPoint(
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context,
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appState,
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renderConfig,
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centerPoint,
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radius,
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false,
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);
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}
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} else {
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renderSingleLinearPoint(
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context,
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appState,
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renderConfig,
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centerPoint,
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POINT_HANDLE_SIZE / 2,
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false,
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true,
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);
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}
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}
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context.restore();
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};
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const highlightPoint = (
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point: Point,
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context: CanvasRenderingContext2D,
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renderConfig: RenderConfig,
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) => {
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context.fillStyle = "rgba(105, 101, 219, 0.4)";
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fillCircle(
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context,
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point[0],
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point[1],
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LinearElementEditor.POINT_HANDLE_SIZE / renderConfig.zoom.value,
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false,
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);
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};
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const renderLinearElementPointHighlight = (
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context: CanvasRenderingContext2D,
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appState: AppState,
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renderConfig: RenderConfig,
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) => {
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const { elementId, hoverPointIndex } = appState.selectedLinearElement!;
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if (
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appState.editingLinearElement?.selectedPointsIndices?.includes(
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hoverPointIndex,
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)
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) {
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return;
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}
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const element = LinearElementEditor.getElement(elementId);
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if (!element) {
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return;
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}
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const point = LinearElementEditor.getPointAtIndexGlobalCoordinates(
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element,
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hoverPointIndex,
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);
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context.save();
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context.translate(renderConfig.scrollX, renderConfig.scrollY);
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highlightPoint(point, context, renderConfig);
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context.restore();
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};
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export const _renderScene = ({
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elements,
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appState,
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scale,
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rc,
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canvas,
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renderConfig,
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}: {
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elements: readonly NonDeletedExcalidrawElement[];
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appState: AppState;
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scale: number;
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rc: RoughCanvas;
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canvas: HTMLCanvasElement;
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renderConfig: RenderConfig;
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}) =>
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// extra options passed to the renderer
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{
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if (canvas === null) {
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return { atLeastOneVisibleElement: false };
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}
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const {
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renderScrollbars = true,
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renderSelection = true,
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renderGrid = true,
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isExporting,
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} = renderConfig;
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const context = canvas.getContext("2d")!;
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context.setTransform(1, 0, 0, 1, 0, 0);
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context.save();
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context.scale(scale, scale);
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// When doing calculations based on canvas width we should used normalized one
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const normalizedCanvasWidth = canvas.width / scale;
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const normalizedCanvasHeight = canvas.height / scale;
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if (isExporting && renderConfig.theme === "dark") {
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context.filter = THEME_FILTER;
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}
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// Paint background
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if (typeof renderConfig.viewBackgroundColor === "string") {
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const hasTransparence =
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renderConfig.viewBackgroundColor === "transparent" ||
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renderConfig.viewBackgroundColor.length === 5 || // #RGBA
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renderConfig.viewBackgroundColor.length === 9 || // #RRGGBBA
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/(hsla|rgba)\(/.test(renderConfig.viewBackgroundColor);
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if (hasTransparence) {
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context.clearRect(0, 0, normalizedCanvasWidth, normalizedCanvasHeight);
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}
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context.save();
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context.fillStyle = renderConfig.viewBackgroundColor;
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context.fillRect(0, 0, normalizedCanvasWidth, normalizedCanvasHeight);
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context.restore();
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} else {
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context.clearRect(0, 0, normalizedCanvasWidth, normalizedCanvasHeight);
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}
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// Apply zoom
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context.save();
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context.scale(renderConfig.zoom.value, renderConfig.zoom.value);
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// Grid
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if (renderGrid && appState.gridSize) {
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strokeGrid(
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context,
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appState.gridSize,
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-Math.ceil(renderConfig.zoom.value / appState.gridSize) *
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appState.gridSize +
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(renderConfig.scrollX % appState.gridSize),
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-Math.ceil(renderConfig.zoom.value / appState.gridSize) *
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appState.gridSize +
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(renderConfig.scrollY % appState.gridSize),
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normalizedCanvasWidth / renderConfig.zoom.value,
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normalizedCanvasHeight / renderConfig.zoom.value,
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);
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}
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// Paint visible elements
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const visibleElements = elements.filter((element) =>
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isVisibleElement(element, normalizedCanvasWidth, normalizedCanvasHeight, {
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zoom: renderConfig.zoom,
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offsetLeft: appState.offsetLeft,
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offsetTop: appState.offsetTop,
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scrollX: renderConfig.scrollX,
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scrollY: renderConfig.scrollY,
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}),
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);
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visibleElements.forEach((element) => {
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try {
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renderElement(element, rc, context, renderConfig);
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if (!isExporting) {
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renderLinkIcon(element, context, appState);
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}
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} catch (error: any) {
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console.error(error);
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}
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});
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if (appState.editingLinearElement) {
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const element = LinearElementEditor.getElement(
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appState.editingLinearElement.elementId,
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);
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if (element) {
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renderLinearPointHandles(context, appState, renderConfig, element);
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}
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}
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// Paint selection element
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if (appState.selectionElement) {
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try {
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renderElement(appState.selectionElement, rc, context, renderConfig);
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} catch (error: any) {
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console.error(error);
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}
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}
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if (isBindingEnabled(appState)) {
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appState.suggestedBindings
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.filter((binding) => binding != null)
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.forEach((suggestedBinding) => {
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renderBindingHighlight(context, renderConfig, suggestedBinding!);
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});
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}
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if (
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appState.selectedLinearElement &&
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appState.selectedLinearElement.hoverPointIndex >= 0
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) {
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renderLinearElementPointHighlight(context, appState, renderConfig);
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}
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// Paint selected elements
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if (
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renderSelection &&
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!appState.multiElement &&
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!appState.editingLinearElement
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) {
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const locallySelectedElements = getSelectedElements(elements, appState);
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const showBoundingBox = shouldShowBoundingBox(
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locallySelectedElements,
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appState,
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);
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const locallySelectedIds = locallySelectedElements.map(
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(element) => element.id,
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);
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const isSingleLinearElementSelected =
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locallySelectedElements.length === 1 &&
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isLinearElement(locallySelectedElements[0]);
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// render selected linear element points
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if (
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isSingleLinearElementSelected &&
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appState.selectedLinearElement?.elementId ===
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locallySelectedElements[0].id &&
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!locallySelectedElements[0].locked
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) {
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renderLinearPointHandles(
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context,
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appState,
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renderConfig,
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locallySelectedElements[0] as ExcalidrawLinearElement,
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);
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}
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if (showBoundingBox) {
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const selections = elements.reduce((acc, element) => {
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const selectionColors = [];
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// local user
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if (
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locallySelectedIds.includes(element.id) &&
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!isSelectedViaGroup(appState, element)
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) {
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selectionColors.push(oc.black);
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}
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// remote users
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if (renderConfig.remoteSelectedElementIds[element.id]) {
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selectionColors.push(
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...renderConfig.remoteSelectedElementIds[element.id].map(
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(socketId) => {
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const { background } = getClientColors(socketId, appState);
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return background;
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},
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),
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);
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}
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if (selectionColors.length) {
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const [elementX1, elementY1, elementX2, elementY2] =
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getElementAbsoluteCoords(element);
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acc.push({
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angle: element.angle,
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elementX1,
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elementY1,
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elementX2,
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elementY2,
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selectionColors,
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});
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}
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return acc;
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}, [] as { angle: number; elementX1: number; elementY1: number; elementX2: number; elementY2: number; selectionColors: string[] }[]);
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|
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const addSelectionForGroupId = (groupId: GroupId) => {
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const groupElements = getElementsInGroup(elements, groupId);
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const [elementX1, elementY1, elementX2, elementY2] =
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getCommonBounds(groupElements);
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selections.push({
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angle: 0,
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elementX1,
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elementX2,
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elementY1,
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elementY2,
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selectionColors: [oc.black],
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});
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};
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|
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for (const groupId of getSelectedGroupIds(appState)) {
|
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// TODO: support multiplayer selected group IDs
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addSelectionForGroupId(groupId);
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}
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if (appState.editingGroupId) {
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addSelectionForGroupId(appState.editingGroupId);
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}
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selections.forEach((selection) =>
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renderSelectionBorder(
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context,
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renderConfig,
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selection,
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isSingleLinearElementSelected
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? DEFAULT_SPACING * 2
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: DEFAULT_SPACING,
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),
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);
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}
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// Paint resize transformHandles
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context.save();
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context.translate(renderConfig.scrollX, renderConfig.scrollY);
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|
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if (locallySelectedElements.length === 1) {
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context.fillStyle = oc.white;
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const transformHandles = getTransformHandles(
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locallySelectedElements[0],
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renderConfig.zoom,
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"mouse", // when we render we don't know which pointer type so use mouse
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);
|
|
if (!appState.viewModeEnabled && showBoundingBox) {
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renderTransformHandles(
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context,
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renderConfig,
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transformHandles,
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locallySelectedElements[0].angle,
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);
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}
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|
} else if (locallySelectedElements.length > 1 && !appState.isRotating) {
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|
const dashedLinePadding = 4 / renderConfig.zoom.value;
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context.fillStyle = oc.white;
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const [x1, y1, x2, y2] = getCommonBounds(locallySelectedElements);
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|
const initialLineDash = context.getLineDash();
|
|
context.setLineDash([2 / renderConfig.zoom.value]);
|
|
const lineWidth = context.lineWidth;
|
|
context.lineWidth = 1 / renderConfig.zoom.value;
|
|
strokeRectWithRotation(
|
|
context,
|
|
x1 - dashedLinePadding,
|
|
y1 - dashedLinePadding,
|
|
x2 - x1 + dashedLinePadding * 2,
|
|
y2 - y1 + dashedLinePadding * 2,
|
|
(x1 + x2) / 2,
|
|
(y1 + y2) / 2,
|
|
0,
|
|
);
|
|
context.lineWidth = lineWidth;
|
|
context.setLineDash(initialLineDash);
|
|
const transformHandles = getTransformHandlesFromCoords(
|
|
[x1, y1, x2, y2],
|
|
0,
|
|
renderConfig.zoom,
|
|
"mouse",
|
|
OMIT_SIDES_FOR_MULTIPLE_ELEMENTS,
|
|
);
|
|
if (locallySelectedElements.some((element) => !element.locked)) {
|
|
renderTransformHandles(context, renderConfig, transformHandles, 0);
|
|
}
|
|
}
|
|
context.restore();
|
|
}
|
|
|
|
// Reset zoom
|
|
context.restore();
|
|
|
|
// Paint remote pointers
|
|
for (const clientId in renderConfig.remotePointerViewportCoords) {
|
|
let { x, y } = renderConfig.remotePointerViewportCoords[clientId];
|
|
|
|
x -= appState.offsetLeft;
|
|
y -= appState.offsetTop;
|
|
|
|
const width = 9;
|
|
const height = 14;
|
|
|
|
const isOutOfBounds =
|
|
x < 0 ||
|
|
x > normalizedCanvasWidth - width ||
|
|
y < 0 ||
|
|
y > normalizedCanvasHeight - height;
|
|
|
|
x = Math.max(x, 0);
|
|
x = Math.min(x, normalizedCanvasWidth - width);
|
|
y = Math.max(y, 0);
|
|
y = Math.min(y, normalizedCanvasHeight - height);
|
|
|
|
const { background, stroke } = getClientColors(clientId, appState);
|
|
|
|
context.save();
|
|
context.strokeStyle = stroke;
|
|
context.fillStyle = background;
|
|
|
|
const userState = renderConfig.remotePointerUserStates[clientId];
|
|
if (isOutOfBounds || userState === UserIdleState.AWAY) {
|
|
context.globalAlpha = 0.48;
|
|
}
|
|
|
|
if (
|
|
renderConfig.remotePointerButton &&
|
|
renderConfig.remotePointerButton[clientId] === "down"
|
|
) {
|
|
context.beginPath();
|
|
context.arc(x, y, 15, 0, 2 * Math.PI, false);
|
|
context.lineWidth = 3;
|
|
context.strokeStyle = "#ffffff88";
|
|
context.stroke();
|
|
context.closePath();
|
|
|
|
context.beginPath();
|
|
context.arc(x, y, 15, 0, 2 * Math.PI, false);
|
|
context.lineWidth = 1;
|
|
context.strokeStyle = stroke;
|
|
context.stroke();
|
|
context.closePath();
|
|
}
|
|
|
|
context.beginPath();
|
|
context.moveTo(x, y);
|
|
context.lineTo(x + 1, y + 14);
|
|
context.lineTo(x + 4, y + 9);
|
|
context.lineTo(x + 9, y + 10);
|
|
context.lineTo(x, y);
|
|
context.fill();
|
|
context.stroke();
|
|
|
|
const username = renderConfig.remotePointerUsernames[clientId];
|
|
|
|
let idleState = "";
|
|
if (userState === UserIdleState.AWAY) {
|
|
idleState = hasEmojiSupport ? "⚫️" : ` (${UserIdleState.AWAY})`;
|
|
} else if (userState === UserIdleState.IDLE) {
|
|
idleState = hasEmojiSupport ? "💤" : ` (${UserIdleState.IDLE})`;
|
|
} else if (userState === UserIdleState.ACTIVE) {
|
|
idleState = hasEmojiSupport ? "🟢" : "";
|
|
}
|
|
|
|
const usernameAndIdleState = `${
|
|
username ? `${username} ` : ""
|
|
}${idleState}`;
|
|
|
|
if (!isOutOfBounds && usernameAndIdleState) {
|
|
const offsetX = x + width;
|
|
const offsetY = y + height;
|
|
const paddingHorizontal = 4;
|
|
const paddingVertical = 4;
|
|
const measure = context.measureText(usernameAndIdleState);
|
|
const measureHeight =
|
|
measure.actualBoundingBoxDescent + measure.actualBoundingBoxAscent;
|
|
|
|
// Border
|
|
context.fillStyle = stroke;
|
|
context.fillRect(
|
|
offsetX - 1,
|
|
offsetY - 1,
|
|
measure.width + 2 * paddingHorizontal + 2,
|
|
measureHeight + 2 * paddingVertical + 2,
|
|
);
|
|
// Background
|
|
context.fillStyle = background;
|
|
context.fillRect(
|
|
offsetX,
|
|
offsetY,
|
|
measure.width + 2 * paddingHorizontal,
|
|
measureHeight + 2 * paddingVertical,
|
|
);
|
|
context.fillStyle = oc.white;
|
|
|
|
context.fillText(
|
|
usernameAndIdleState,
|
|
offsetX + paddingHorizontal,
|
|
offsetY + paddingVertical + measure.actualBoundingBoxAscent,
|
|
);
|
|
}
|
|
|
|
context.restore();
|
|
context.closePath();
|
|
}
|
|
|
|
// Paint scrollbars
|
|
let scrollBars;
|
|
if (renderScrollbars) {
|
|
scrollBars = getScrollBars(
|
|
elements,
|
|
normalizedCanvasWidth,
|
|
normalizedCanvasHeight,
|
|
renderConfig,
|
|
);
|
|
|
|
context.save();
|
|
context.fillStyle = SCROLLBAR_COLOR;
|
|
context.strokeStyle = "rgba(255,255,255,0.8)";
|
|
[scrollBars.horizontal, scrollBars.vertical].forEach((scrollBar) => {
|
|
if (scrollBar) {
|
|
roundRect(
|
|
context,
|
|
scrollBar.x,
|
|
scrollBar.y,
|
|
scrollBar.width,
|
|
scrollBar.height,
|
|
SCROLLBAR_WIDTH / 2,
|
|
);
|
|
}
|
|
});
|
|
context.restore();
|
|
}
|
|
|
|
context.restore();
|
|
return { atLeastOneVisibleElement: visibleElements.length > 0, scrollBars };
|
|
};
|
|
|
|
const renderSceneThrottled = throttleRAF(
|
|
(config: {
|
|
elements: readonly NonDeletedExcalidrawElement[];
|
|
appState: AppState;
|
|
scale: number;
|
|
rc: RoughCanvas;
|
|
canvas: HTMLCanvasElement;
|
|
renderConfig: RenderConfig;
|
|
callback?: (data: ReturnType<typeof _renderScene>) => void;
|
|
}) => {
|
|
const ret = _renderScene(config);
|
|
config.callback?.(ret);
|
|
},
|
|
{ trailing: true },
|
|
);
|
|
|
|
/** renderScene throttled to animation framerate */
|
|
export const renderScene = <T extends boolean = false>(
|
|
config: {
|
|
elements: readonly NonDeletedExcalidrawElement[];
|
|
appState: AppState;
|
|
scale: number;
|
|
rc: RoughCanvas;
|
|
canvas: HTMLCanvasElement;
|
|
renderConfig: RenderConfig;
|
|
callback?: (data: ReturnType<typeof _renderScene>) => void;
|
|
},
|
|
/** Whether to throttle rendering. Defaults to false.
|
|
* When throttling, no value is returned. Use the callback instead. */
|
|
throttle?: T,
|
|
): T extends true ? void : ReturnType<typeof _renderScene> => {
|
|
if (throttle) {
|
|
renderSceneThrottled(config);
|
|
return undefined as T extends true ? void : ReturnType<typeof _renderScene>;
|
|
}
|
|
const ret = _renderScene(config);
|
|
config.callback?.(ret);
|
|
return ret as T extends true ? void : ReturnType<typeof _renderScene>;
|
|
};
|
|
|
|
const renderTransformHandles = (
|
|
context: CanvasRenderingContext2D,
|
|
renderConfig: RenderConfig,
|
|
transformHandles: TransformHandles,
|
|
angle: number,
|
|
): void => {
|
|
Object.keys(transformHandles).forEach((key) => {
|
|
const transformHandle = transformHandles[key as TransformHandleType];
|
|
if (transformHandle !== undefined) {
|
|
const [x, y, width, height] = transformHandle;
|
|
|
|
context.save();
|
|
context.lineWidth = 1 / renderConfig.zoom.value;
|
|
if (key === "rotation") {
|
|
fillCircle(context, x + width / 2, y + height / 2, width / 2);
|
|
} else {
|
|
strokeRectWithRotation(
|
|
context,
|
|
x,
|
|
y,
|
|
width,
|
|
height,
|
|
x + width / 2,
|
|
y + height / 2,
|
|
angle,
|
|
true, // fill before stroke
|
|
);
|
|
}
|
|
context.restore();
|
|
}
|
|
});
|
|
};
|
|
|
|
const renderSelectionBorder = (
|
|
context: CanvasRenderingContext2D,
|
|
renderConfig: RenderConfig,
|
|
elementProperties: {
|
|
angle: number;
|
|
elementX1: number;
|
|
elementY1: number;
|
|
elementX2: number;
|
|
elementY2: number;
|
|
selectionColors: string[];
|
|
},
|
|
padding = 4,
|
|
) => {
|
|
const { angle, elementX1, elementY1, elementX2, elementY2, selectionColors } =
|
|
elementProperties;
|
|
const elementWidth = elementX2 - elementX1;
|
|
const elementHeight = elementY2 - elementY1;
|
|
|
|
const dashedLinePadding = padding / renderConfig.zoom.value;
|
|
const dashWidth = 8 / renderConfig.zoom.value;
|
|
const spaceWidth = 4 / renderConfig.zoom.value;
|
|
|
|
context.save();
|
|
context.translate(renderConfig.scrollX, renderConfig.scrollY);
|
|
context.lineWidth = 1 / renderConfig.zoom.value;
|
|
|
|
const count = selectionColors.length;
|
|
for (let index = 0; index < count; ++index) {
|
|
context.strokeStyle = selectionColors[index];
|
|
context.setLineDash([
|
|
dashWidth,
|
|
spaceWidth + (dashWidth + spaceWidth) * (count - 1),
|
|
]);
|
|
context.lineDashOffset = (dashWidth + spaceWidth) * index;
|
|
strokeRectWithRotation(
|
|
context,
|
|
elementX1 - dashedLinePadding,
|
|
elementY1 - dashedLinePadding,
|
|
elementWidth + dashedLinePadding * 2,
|
|
elementHeight + dashedLinePadding * 2,
|
|
elementX1 + elementWidth / 2,
|
|
elementY1 + elementHeight / 2,
|
|
angle,
|
|
);
|
|
}
|
|
context.restore();
|
|
};
|
|
|
|
const renderBindingHighlight = (
|
|
context: CanvasRenderingContext2D,
|
|
renderConfig: RenderConfig,
|
|
suggestedBinding: SuggestedBinding,
|
|
) => {
|
|
const renderHighlight = Array.isArray(suggestedBinding)
|
|
? renderBindingHighlightForSuggestedPointBinding
|
|
: renderBindingHighlightForBindableElement;
|
|
|
|
context.save();
|
|
context.translate(renderConfig.scrollX, renderConfig.scrollY);
|
|
renderHighlight(context, suggestedBinding as any);
|
|
|
|
context.restore();
|
|
};
|
|
|
|
const renderBindingHighlightForBindableElement = (
|
|
context: CanvasRenderingContext2D,
|
|
element: ExcalidrawBindableElement,
|
|
) => {
|
|
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element);
|
|
const width = x2 - x1;
|
|
const height = y2 - y1;
|
|
const threshold = maxBindingGap(element, width, height);
|
|
|
|
// So that we don't overlap the element itself
|
|
const strokeOffset = 4;
|
|
context.strokeStyle = "rgba(0,0,0,.05)";
|
|
context.lineWidth = threshold - strokeOffset;
|
|
const padding = strokeOffset / 2 + threshold / 2;
|
|
|
|
switch (element.type) {
|
|
case "rectangle":
|
|
case "text":
|
|
case "image":
|
|
strokeRectWithRotation(
|
|
context,
|
|
x1 - padding,
|
|
y1 - padding,
|
|
width + padding * 2,
|
|
height + padding * 2,
|
|
x1 + width / 2,
|
|
y1 + height / 2,
|
|
element.angle,
|
|
);
|
|
break;
|
|
case "diamond":
|
|
const side = Math.hypot(width, height);
|
|
const wPadding = (padding * side) / height;
|
|
const hPadding = (padding * side) / width;
|
|
strokeDiamondWithRotation(
|
|
context,
|
|
width + wPadding * 2,
|
|
height + hPadding * 2,
|
|
x1 + width / 2,
|
|
y1 + height / 2,
|
|
element.angle,
|
|
);
|
|
break;
|
|
case "ellipse":
|
|
strokeEllipseWithRotation(
|
|
context,
|
|
width + padding * 2,
|
|
height + padding * 2,
|
|
x1 + width / 2,
|
|
y1 + height / 2,
|
|
element.angle,
|
|
);
|
|
break;
|
|
}
|
|
};
|
|
|
|
const renderBindingHighlightForSuggestedPointBinding = (
|
|
context: CanvasRenderingContext2D,
|
|
suggestedBinding: SuggestedPointBinding,
|
|
) => {
|
|
const [element, startOrEnd, bindableElement] = suggestedBinding;
|
|
|
|
const threshold = maxBindingGap(
|
|
bindableElement,
|
|
bindableElement.width,
|
|
bindableElement.height,
|
|
);
|
|
|
|
context.strokeStyle = "rgba(0,0,0,0)";
|
|
context.fillStyle = "rgba(0,0,0,.05)";
|
|
|
|
const pointIndices =
|
|
startOrEnd === "both" ? [0, -1] : startOrEnd === "start" ? [0] : [-1];
|
|
pointIndices.forEach((index) => {
|
|
const [x, y] = LinearElementEditor.getPointAtIndexGlobalCoordinates(
|
|
element,
|
|
index,
|
|
);
|
|
fillCircle(context, x, y, threshold);
|
|
});
|
|
};
|
|
|
|
let linkCanvasCache: any;
|
|
const renderLinkIcon = (
|
|
element: NonDeletedExcalidrawElement,
|
|
context: CanvasRenderingContext2D,
|
|
appState: AppState,
|
|
) => {
|
|
if (element.link && !appState.selectedElementIds[element.id]) {
|
|
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element);
|
|
const [x, y, width, height] = getLinkHandleFromCoords(
|
|
[x1, y1, x2, y2],
|
|
element.angle,
|
|
appState,
|
|
);
|
|
const centerX = x + width / 2;
|
|
const centerY = y + height / 2;
|
|
context.save();
|
|
context.translate(appState.scrollX + centerX, appState.scrollY + centerY);
|
|
context.rotate(element.angle);
|
|
|
|
if (!linkCanvasCache || linkCanvasCache.zoom !== appState.zoom.value) {
|
|
linkCanvasCache = document.createElement("canvas");
|
|
linkCanvasCache.zoom = appState.zoom.value;
|
|
linkCanvasCache.width =
|
|
width * window.devicePixelRatio * appState.zoom.value;
|
|
linkCanvasCache.height =
|
|
height * window.devicePixelRatio * appState.zoom.value;
|
|
const linkCanvasCacheContext = linkCanvasCache.getContext("2d")!;
|
|
linkCanvasCacheContext.scale(
|
|
window.devicePixelRatio * appState.zoom.value,
|
|
window.devicePixelRatio * appState.zoom.value,
|
|
);
|
|
linkCanvasCacheContext.fillStyle = "#fff";
|
|
linkCanvasCacheContext.fillRect(0, 0, width, height);
|
|
linkCanvasCacheContext.drawImage(EXTERNAL_LINK_IMG, 0, 0, width, height);
|
|
linkCanvasCacheContext.restore();
|
|
context.drawImage(
|
|
linkCanvasCache,
|
|
x - centerX,
|
|
y - centerY,
|
|
width,
|
|
height,
|
|
);
|
|
} else {
|
|
context.drawImage(
|
|
linkCanvasCache,
|
|
x - centerX,
|
|
y - centerY,
|
|
width,
|
|
height,
|
|
);
|
|
}
|
|
context.restore();
|
|
}
|
|
};
|
|
|
|
const isVisibleElement = (
|
|
element: ExcalidrawElement,
|
|
canvasWidth: number,
|
|
canvasHeight: number,
|
|
viewTransformations: {
|
|
zoom: Zoom;
|
|
offsetLeft: number;
|
|
offsetTop: number;
|
|
scrollX: number;
|
|
scrollY: number;
|
|
},
|
|
) => {
|
|
const [x1, y1, x2, y2] = getElementBounds(element); // scene coordinates
|
|
const topLeftSceneCoords = viewportCoordsToSceneCoords(
|
|
{
|
|
clientX: viewTransformations.offsetLeft,
|
|
clientY: viewTransformations.offsetTop,
|
|
},
|
|
viewTransformations,
|
|
);
|
|
const bottomRightSceneCoords = viewportCoordsToSceneCoords(
|
|
{
|
|
clientX: viewTransformations.offsetLeft + canvasWidth,
|
|
clientY: viewTransformations.offsetTop + canvasHeight,
|
|
},
|
|
viewTransformations,
|
|
);
|
|
|
|
return (
|
|
topLeftSceneCoords.x <= x2 &&
|
|
topLeftSceneCoords.y <= y2 &&
|
|
bottomRightSceneCoords.x >= x1 &&
|
|
bottomRightSceneCoords.y >= y1
|
|
);
|
|
};
|
|
|
|
// This should be only called for exporting purposes
|
|
export const renderSceneToSvg = (
|
|
elements: readonly NonDeletedExcalidrawElement[],
|
|
rsvg: RoughSVG,
|
|
svgRoot: SVGElement,
|
|
files: BinaryFiles,
|
|
{
|
|
offsetX = 0,
|
|
offsetY = 0,
|
|
exportWithDarkMode = false,
|
|
}: {
|
|
offsetX?: number;
|
|
offsetY?: number;
|
|
exportWithDarkMode?: boolean;
|
|
} = {},
|
|
) => {
|
|
if (!svgRoot) {
|
|
return;
|
|
}
|
|
// render elements
|
|
elements.forEach((element) => {
|
|
if (!element.isDeleted) {
|
|
try {
|
|
renderElementToSvg(
|
|
element,
|
|
rsvg,
|
|
svgRoot,
|
|
files,
|
|
element.x + offsetX,
|
|
element.y + offsetY,
|
|
exportWithDarkMode,
|
|
);
|
|
} catch (error: any) {
|
|
console.error(error);
|
|
}
|
|
}
|
|
});
|
|
};
|