1360 lines
38 KiB
TypeScript
1360 lines
38 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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ExcalidrawFrameElement,
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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 { getClientColor } 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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selectGroupsFromGivenElements,
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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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OMIT_SIDES_FOR_FRAME,
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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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throttleRAF,
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isOnlyExportingSingleFrame,
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} from "../utils";
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import { UserIdleState } from "../types";
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import { FRAME_STYLE, 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 { isFrameElement, isLinearElement } from "../element/typeChecks";
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import {
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elementOverlapsWithFrame,
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getTargetFrame,
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isElementInFrame,
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} from "../frame";
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import "canvas-roundrect-polyfill";
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export const DEFAULT_SPACING = 2;
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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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/** should account for zoom */
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radius: number = 0,
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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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if (radius && context.roundRect) {
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context.beginPath();
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context.roundRect(x - cx, y - cy, width, height, radius);
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context.stroke();
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context.closePath();
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} else {
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context.strokeRect(x - cx, y - cy, width, height);
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}
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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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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 { 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(context, renderConfig, point, radius, isSelected);
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});
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//Rendering segment mid points
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const midPoints = LinearElementEditor.getEditorMidPoints(
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element,
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appState,
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).filter((midPoint) => midPoint !== null) as Point[];
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midPoints.forEach((segmentMidPoint) => {
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if (
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appState?.selectedLinearElement?.segmentMidPointHoveredCoords &&
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LinearElementEditor.arePointsEqual(
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segmentMidPoint,
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appState.selectedLinearElement.segmentMidPointHoveredCoords,
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)
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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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renderConfig,
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segmentMidPoint,
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radius,
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false,
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);
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highlightPoint(segmentMidPoint, context, renderConfig);
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} else {
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highlightPoint(segmentMidPoint, context, renderConfig);
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renderSingleLinearPoint(
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context,
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renderConfig,
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segmentMidPoint,
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radius,
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false,
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);
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}
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} else if (appState.editingLinearElement || points.length === 2) {
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renderSingleLinearPoint(
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context,
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renderConfig,
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segmentMidPoint,
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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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const frameClip = (
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frame: ExcalidrawFrameElement,
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context: CanvasRenderingContext2D,
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renderConfig: RenderConfig,
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) => {
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context.translate(
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frame.x + renderConfig.scrollX,
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frame.y + renderConfig.scrollY,
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);
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context.beginPath();
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if (context.roundRect && !renderConfig.isExporting) {
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context.roundRect(
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0,
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0,
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frame.width,
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frame.height,
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FRAME_STYLE.radius / renderConfig.zoom.value,
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);
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} else {
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context.rect(0, 0, frame.width, frame.height);
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}
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context.clip();
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context.translate(
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-(frame.x + renderConfig.scrollX),
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-(frame.y + renderConfig.scrollY),
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);
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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 = false,
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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 selectionColor = renderConfig.selectionColor || oc.black;
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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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const groupsToBeAddedToFrame = new Set<string>();
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visibleElements.forEach((element) => {
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if (
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element.groupIds.length > 0 &&
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appState.frameToHighlight &&
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appState.selectedElementIds[element.id] &&
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(elementOverlapsWithFrame(element, appState.frameToHighlight) ||
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element.groupIds.find((groupId) =>
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groupsToBeAddedToFrame.has(groupId),
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))
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) {
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element.groupIds.forEach((groupId) =>
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groupsToBeAddedToFrame.add(groupId),
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);
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}
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});
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let editingLinearElement: NonDeleted<ExcalidrawLinearElement> | undefined =
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undefined;
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visibleElements.forEach((element) => {
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try {
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// - when exporting the whole canvas, we DO NOT apply clipping
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// - when we are exporting a particular frame, apply clipping
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// if the containing frame is not selected, apply clipping
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const frameId = element.frameId || appState.frameToHighlight?.id;
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if (
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frameId &&
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((renderConfig.isExporting && isOnlyExportingSingleFrame(elements)) ||
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(!renderConfig.isExporting &&
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appState.frameRendering.enabled &&
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appState.frameRendering.clip))
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) {
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context.save();
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const frame = getTargetFrame(element, appState);
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if (frame && isElementInFrame(element, elements, appState)) {
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frameClip(frame, context, renderConfig);
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}
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renderElement(element, rc, context, renderConfig, appState);
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context.restore();
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} else {
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renderElement(element, rc, context, renderConfig, appState);
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}
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// Getting the element using LinearElementEditor during collab mismatches version - being one head of visible elements due to
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// ShapeCache returns empty hence making sure that we get the
|
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// correct element from visible elements
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if (appState.editingLinearElement?.elementId === element.id) {
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if (element) {
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editingLinearElement =
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element as NonDeleted<ExcalidrawLinearElement>;
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}
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}
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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 (editingLinearElement) {
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renderLinearPointHandles(
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context,
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appState,
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renderConfig,
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editingLinearElement,
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);
|
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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(
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appState.selectionElement,
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rc,
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context,
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renderConfig,
|
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appState,
|
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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 (appState.frameToHighlight) {
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renderFrameHighlight(context, renderConfig, appState.frameToHighlight);
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}
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if (appState.elementsToHighlight) {
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renderElementsBoxHighlight(
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context,
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renderConfig,
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appState.elementsToHighlight,
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appState,
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);
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}
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const locallySelectedElements = getSelectedElements(elements, appState);
|
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const isFrameSelected = locallySelectedElements.some((element) =>
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isFrameElement(element),
|
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);
|
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|
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// Getting the element using LinearElementEditor during collab mismatches version - being one head of visible elements due to
|
|
// ShapeCache returns empty hence making sure that we get the
|
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// correct element from visible elements
|
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if (
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locallySelectedElements.length === 1 &&
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appState.editingLinearElement?.elementId === locallySelectedElements[0].id
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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 NonDeleted<ExcalidrawLinearElement>,
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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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|
) {
|
|
renderLinearElementPointHighlight(context, appState, renderConfig);
|
|
}
|
|
// Paint selected elements
|
|
if (
|
|
renderSelection &&
|
|
!appState.multiElement &&
|
|
!appState.editingLinearElement
|
|
) {
|
|
const showBoundingBox = shouldShowBoundingBox(
|
|
locallySelectedElements,
|
|
appState,
|
|
);
|
|
|
|
const locallySelectedIds = locallySelectedElements.map(
|
|
(element) => element.id,
|
|
);
|
|
const isSingleLinearElementSelected =
|
|
locallySelectedElements.length === 1 &&
|
|
isLinearElement(locallySelectedElements[0]);
|
|
// render selected linear element points
|
|
if (
|
|
isSingleLinearElementSelected &&
|
|
appState.selectedLinearElement?.elementId ===
|
|
locallySelectedElements[0].id &&
|
|
!locallySelectedElements[0].locked
|
|
) {
|
|
renderLinearPointHandles(
|
|
context,
|
|
appState,
|
|
renderConfig,
|
|
locallySelectedElements[0] as ExcalidrawLinearElement,
|
|
);
|
|
}
|
|
if (showBoundingBox) {
|
|
const selections = elements.reduce((acc, element) => {
|
|
const selectionColors = [];
|
|
// local user
|
|
if (
|
|
locallySelectedIds.includes(element.id) &&
|
|
!isSelectedViaGroup(appState, element)
|
|
) {
|
|
selectionColors.push(selectionColor);
|
|
}
|
|
// remote users
|
|
if (renderConfig.remoteSelectedElementIds[element.id]) {
|
|
selectionColors.push(
|
|
...renderConfig.remoteSelectedElementIds[element.id].map(
|
|
(socketId) => {
|
|
const background = getClientColor(socketId);
|
|
return background;
|
|
},
|
|
),
|
|
);
|
|
}
|
|
|
|
if (selectionColors.length) {
|
|
const [elementX1, elementY1, elementX2, elementY2, cx, cy] =
|
|
getElementAbsoluteCoords(element, true);
|
|
acc.push({
|
|
angle: element.angle,
|
|
elementX1,
|
|
elementY1,
|
|
elementX2,
|
|
elementY2,
|
|
selectionColors,
|
|
dashed: !!renderConfig.remoteSelectedElementIds[element.id],
|
|
cx,
|
|
cy,
|
|
});
|
|
}
|
|
return acc;
|
|
}, [] as { angle: number; elementX1: number; elementY1: number; elementX2: number; elementY2: number; selectionColors: string[]; dashed?: boolean; cx: number; cy: number }[]);
|
|
|
|
const addSelectionForGroupId = (groupId: GroupId) => {
|
|
const groupElements = getElementsInGroup(elements, groupId);
|
|
const [elementX1, elementY1, elementX2, elementY2] =
|
|
getCommonBounds(groupElements);
|
|
selections.push({
|
|
angle: 0,
|
|
elementX1,
|
|
elementX2,
|
|
elementY1,
|
|
elementY2,
|
|
selectionColors: [oc.black],
|
|
dashed: true,
|
|
cx: elementX1 + (elementX2 - elementX1) / 2,
|
|
cy: elementY1 + (elementY2 - elementY1) / 2,
|
|
});
|
|
};
|
|
|
|
for (const groupId of getSelectedGroupIds(appState)) {
|
|
// TODO: support multiplayer selected group IDs
|
|
addSelectionForGroupId(groupId);
|
|
}
|
|
|
|
if (appState.editingGroupId) {
|
|
addSelectionForGroupId(appState.editingGroupId);
|
|
}
|
|
|
|
selections.forEach((selection) =>
|
|
renderSelectionBorder(context, renderConfig, selection),
|
|
);
|
|
}
|
|
// Paint resize transformHandles
|
|
context.save();
|
|
context.translate(renderConfig.scrollX, renderConfig.scrollY);
|
|
|
|
if (locallySelectedElements.length === 1) {
|
|
context.fillStyle = oc.white;
|
|
const transformHandles = getTransformHandles(
|
|
locallySelectedElements[0],
|
|
renderConfig.zoom,
|
|
"mouse", // when we render we don't know which pointer type so use mouse
|
|
);
|
|
if (!appState.viewModeEnabled && showBoundingBox) {
|
|
renderTransformHandles(
|
|
context,
|
|
renderConfig,
|
|
transformHandles,
|
|
locallySelectedElements[0].angle,
|
|
);
|
|
}
|
|
} else if (locallySelectedElements.length > 1 && !appState.isRotating) {
|
|
const dashedLinePadding =
|
|
(DEFAULT_SPACING * 2) / renderConfig.zoom.value;
|
|
context.fillStyle = oc.white;
|
|
const [x1, y1, x2, y2] = getCommonBounds(locallySelectedElements);
|
|
const initialLineDash = context.getLineDash();
|
|
context.setLineDash([2 / renderConfig.zoom.value]);
|
|
const lineWidth = context.lineWidth;
|
|
context.lineWidth = 1 / renderConfig.zoom.value;
|
|
context.strokeStyle = selectionColor;
|
|
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, (x1 + x2) / 2, (y1 + y2) / 2],
|
|
0,
|
|
renderConfig.zoom,
|
|
"mouse",
|
|
isFrameSelected
|
|
? OMIT_SIDES_FOR_FRAME
|
|
: 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 = 11;
|
|
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 = getClientColor(clientId);
|
|
|
|
context.save();
|
|
context.strokeStyle = background;
|
|
context.fillStyle = background;
|
|
|
|
const userState = renderConfig.remotePointerUserStates[clientId];
|
|
const isInactive =
|
|
isOutOfBounds ||
|
|
userState === UserIdleState.IDLE ||
|
|
userState === UserIdleState.AWAY;
|
|
|
|
if (isInactive) {
|
|
context.globalAlpha = 0.3;
|
|
}
|
|
|
|
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 = background;
|
|
context.stroke();
|
|
context.closePath();
|
|
}
|
|
|
|
// Background (white outline) for arrow
|
|
context.fillStyle = oc.white;
|
|
context.strokeStyle = oc.white;
|
|
context.lineWidth = 6;
|
|
context.lineJoin = "round";
|
|
context.beginPath();
|
|
context.moveTo(x, y);
|
|
context.lineTo(x + 0, y + 14);
|
|
context.lineTo(x + 4, y + 9);
|
|
context.lineTo(x + 11, y + 8);
|
|
context.closePath();
|
|
context.stroke();
|
|
context.fill();
|
|
|
|
// Arrow
|
|
context.fillStyle = background;
|
|
context.strokeStyle = background;
|
|
context.lineWidth = 2;
|
|
context.lineJoin = "round";
|
|
context.beginPath();
|
|
if (isInactive) {
|
|
context.moveTo(x - 1, y - 1);
|
|
context.lineTo(x - 1, y + 15);
|
|
context.lineTo(x + 5, y + 10);
|
|
context.lineTo(x + 12, y + 9);
|
|
context.closePath();
|
|
context.fill();
|
|
} else {
|
|
context.moveTo(x, y);
|
|
context.lineTo(x + 0, y + 14);
|
|
context.lineTo(x + 4, y + 9);
|
|
context.lineTo(x + 11, y + 8);
|
|
context.closePath();
|
|
context.fill();
|
|
context.stroke();
|
|
}
|
|
|
|
const username = renderConfig.remotePointerUsernames[clientId] || "";
|
|
|
|
if (!isOutOfBounds && username) {
|
|
context.font = "600 12px sans-serif"; // font has to be set before context.measureText()
|
|
|
|
const offsetX = x + width / 2;
|
|
const offsetY = y + height + 2;
|
|
const paddingHorizontal = 5;
|
|
const paddingVertical = 3;
|
|
const measure = context.measureText(username);
|
|
const measureHeight =
|
|
measure.actualBoundingBoxDescent + measure.actualBoundingBoxAscent;
|
|
const finalHeight = Math.max(measureHeight, 12);
|
|
|
|
const boxX = offsetX - 1;
|
|
const boxY = offsetY - 1;
|
|
const boxWidth = measure.width + 2 + paddingHorizontal * 2 + 2;
|
|
const boxHeight = finalHeight + 2 + paddingVertical * 2 + 2;
|
|
if (context.roundRect) {
|
|
context.beginPath();
|
|
context.roundRect(boxX, boxY, boxWidth, boxHeight, 8);
|
|
context.fillStyle = background;
|
|
context.fill();
|
|
context.strokeStyle = oc.white;
|
|
context.stroke();
|
|
} else {
|
|
roundRect(context, boxX, boxY, boxWidth, boxHeight, 8, oc.white);
|
|
}
|
|
context.fillStyle = oc.black;
|
|
|
|
context.fillText(
|
|
username,
|
|
offsetX + paddingHorizontal + 1,
|
|
offsetY +
|
|
paddingVertical +
|
|
measure.actualBoundingBoxAscent +
|
|
Math.floor((finalHeight - measureHeight) / 2) +
|
|
2,
|
|
);
|
|
}
|
|
|
|
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 (renderConfig.selectionColor) {
|
|
context.strokeStyle = renderConfig.selectionColor;
|
|
}
|
|
if (key === "rotation") {
|
|
fillCircle(context, x + width / 2, y + height / 2, width / 2);
|
|
// prefer round corners if roundRect API is available
|
|
} else if (context.roundRect) {
|
|
context.beginPath();
|
|
context.roundRect(x, y, width, height, 2 / renderConfig.zoom.value);
|
|
context.fill();
|
|
context.stroke();
|
|
} 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[];
|
|
dashed?: boolean;
|
|
cx: number;
|
|
cy: number;
|
|
},
|
|
padding = DEFAULT_SPACING * 2,
|
|
) => {
|
|
const {
|
|
angle,
|
|
elementX1,
|
|
elementY1,
|
|
elementX2,
|
|
elementY2,
|
|
selectionColors,
|
|
cx,
|
|
cy,
|
|
dashed,
|
|
} = elementProperties;
|
|
const elementWidth = elementX2 - elementX1;
|
|
const elementHeight = elementY2 - elementY1;
|
|
|
|
const linePadding = padding / renderConfig.zoom.value;
|
|
const lineWidth = 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];
|
|
if (dashed) {
|
|
context.setLineDash([
|
|
lineWidth,
|
|
spaceWidth + (lineWidth + spaceWidth) * (count - 1),
|
|
]);
|
|
}
|
|
context.lineDashOffset = (lineWidth + spaceWidth) * index;
|
|
strokeRectWithRotation(
|
|
context,
|
|
elementX1 - linePadding,
|
|
elementY1 - linePadding,
|
|
elementWidth + linePadding * 2,
|
|
elementHeight + linePadding * 2,
|
|
cx,
|
|
cy,
|
|
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":
|
|
case "frame":
|
|
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 renderFrameHighlight = (
|
|
context: CanvasRenderingContext2D,
|
|
renderConfig: RenderConfig,
|
|
frame: NonDeleted<ExcalidrawFrameElement>,
|
|
) => {
|
|
const [x1, y1, x2, y2] = getElementAbsoluteCoords(frame);
|
|
const width = x2 - x1;
|
|
const height = y2 - y1;
|
|
|
|
context.strokeStyle = "rgb(0,118,255)";
|
|
context.lineWidth = (FRAME_STYLE.strokeWidth * 2) / renderConfig.zoom.value;
|
|
|
|
context.save();
|
|
context.translate(renderConfig.scrollX, renderConfig.scrollY);
|
|
strokeRectWithRotation(
|
|
context,
|
|
x1,
|
|
y1,
|
|
width,
|
|
height,
|
|
x1 + width / 2,
|
|
y1 + height / 2,
|
|
frame.angle,
|
|
false,
|
|
FRAME_STYLE.radius / renderConfig.zoom.value,
|
|
);
|
|
context.restore();
|
|
};
|
|
|
|
const renderElementsBoxHighlight = (
|
|
context: CanvasRenderingContext2D,
|
|
renderConfig: RenderConfig,
|
|
elements: NonDeleted<ExcalidrawElement>[],
|
|
appState: AppState,
|
|
) => {
|
|
const individualElements = elements.filter(
|
|
(element) => element.groupIds.length === 0,
|
|
);
|
|
|
|
const elementsInGroups = elements.filter(
|
|
(element) => element.groupIds.length > 0,
|
|
);
|
|
|
|
const getSelectionFromElements = (elements: ExcalidrawElement[]) => {
|
|
const [elementX1, elementY1, elementX2, elementY2] =
|
|
getCommonBounds(elements);
|
|
return {
|
|
angle: 0,
|
|
elementX1,
|
|
elementX2,
|
|
elementY1,
|
|
elementY2,
|
|
selectionColors: ["rgb(0,118,255)"],
|
|
dashed: false,
|
|
cx: elementX1 + (elementX2 - elementX1) / 2,
|
|
cy: elementY1 + (elementY2 - elementY1) / 2,
|
|
};
|
|
};
|
|
|
|
const getSelectionForGroupId = (groupId: GroupId) => {
|
|
const groupElements = getElementsInGroup(elements, groupId);
|
|
return getSelectionFromElements(groupElements);
|
|
};
|
|
|
|
Object.entries(selectGroupsFromGivenElements(elementsInGroups, appState))
|
|
.filter(([id, isSelected]) => isSelected)
|
|
.map(([id, isSelected]) => id)
|
|
.map((groupId) => getSelectionForGroupId(groupId))
|
|
.concat(
|
|
individualElements.map((element) => getSelectionFromElements([element])),
|
|
)
|
|
.forEach((selection) =>
|
|
renderSelectionBorder(context, renderConfig, selection),
|
|
);
|
|
};
|
|
|
|
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();
|
|
}
|
|
};
|
|
|
|
export 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,
|
|
exportingFrameId = null,
|
|
}: {
|
|
offsetX?: number;
|
|
offsetY?: number;
|
|
exportWithDarkMode?: boolean;
|
|
exportingFrameId?: string | null;
|
|
} = {},
|
|
) => {
|
|
if (!svgRoot) {
|
|
return;
|
|
}
|
|
|
|
// render elements
|
|
elements.forEach((element) => {
|
|
if (!element.isDeleted) {
|
|
try {
|
|
renderElementToSvg(
|
|
element,
|
|
rsvg,
|
|
svgRoot,
|
|
files,
|
|
element.x + offsetX,
|
|
element.y + offsetY,
|
|
exportWithDarkMode,
|
|
exportingFrameId,
|
|
);
|
|
} catch (error: any) {
|
|
console.error(error);
|
|
}
|
|
}
|
|
});
|
|
};
|