feat(editor): ERD arrowheads and diagrams (#10940)

dev-docs/docs/@excalidraw/excalidraw/api/excalidraw-element-skeleton.mdx

@@ -172,7 +172,7 @@ convertToExcalidrawElements([
     type: "arrow",
     x: 450,
     y: 20,
-    startArrowhead: "dot",
+    startArrowhead: "circle",
     endArrowhead: "triangle",
     strokeColor: "#1971c2",
     strokeWidth: 2,

packages/element/src/arrowheads.ts

@@ -0,0 +1,32 @@
+import type { Arrowhead, AnyArrowhead } from "./types";
+
+export const normalizeArrowhead = (
+  arrowhead: AnyArrowhead | null | undefined,
+): Arrowhead | null => {
+  switch (arrowhead) {
+    case undefined:
+    case null:
+      return null;
+    case "dot":
+      return "circle";
+    case "crowfoot_one":
+      return "cardinality_one";
+    case "crowfoot_many":
+      return "cardinality_many";
+    case "crowfoot_one_or_many":
+      return "cardinality_one_or_many";
+    default:
+      return arrowhead;
+  }
+};
+
+export const getArrowheadForPicker = (
+  arrowhead: AnyArrowhead | null | undefined,
+): Arrowhead | null => {
+  const normalizedArrowhead = normalizeArrowhead(arrowhead);
+  if (normalizedArrowhead === null) {
+    return null;
+  }
+
+  return normalizedArrowhead;
+};

packages/element/src/bounds.ts

@@ -709,6 +709,9 @@ const getFreeDrawElementAbsoluteCoords = (
   return [x1, y1, x2, y2, (x1 + x2) / 2, (y1 + y2) / 2];
 };
 
+const CARDINALITY_MARKER_SIZE = 20;
+const CROWFOOT_ARROWHEAD_SIZE = 15;
+
 /** @returns number in pixels */
 export const getArrowheadSize = (arrowhead: Arrowhead): number => {
   switch (arrowhead) {
@@ -717,10 +720,14 @@ export const getArrowheadSize = (arrowhead: Arrowhead): number => {
     case "diamond":
     case "diamond_outline":
       return 12;
-    case "crowfoot_many":
+    case "cardinality_many":
-    case "crowfoot_one":
+    case "cardinality_one_or_many":
-    case "crowfoot_one_or_many":
+    case "cardinality_zero_or_many":
-      return 20;
+      return CROWFOOT_ARROWHEAD_SIZE;
+    case "cardinality_one":
+    case "cardinality_exactly_one":
+    case "cardinality_zero_or_one":
+      return CARDINALITY_MARKER_SIZE;
     default:
       return 15;
   }
@@ -743,7 +750,12 @@ export const getArrowheadPoints = (
   shape: Drawable[],
   position: "start" | "end",
   arrowhead: Arrowhead,
+  offsetMultiplier = 0,
 ) => {
+  if (arrowhead === null) {
+    return null;
+  }
+
   if (shape.length < 1) {
     return null;
   }
@@ -824,29 +836,30 @@ export const getArrowheadPoints = (
   const lengthMultiplier =
     arrowhead === "diamond" || arrowhead === "diamond_outline" ? 0.25 : 0.5;
   const minSize = Math.min(size, length * lengthMultiplier);
-  const xs = x2 - nx * minSize;
+  const tx = x2 - nx * minSize * offsetMultiplier;
-  const ys = y2 - ny * minSize;
+  const ty = y2 - ny * minSize * offsetMultiplier;
+  const xs = tx - nx * minSize;
+  const ys = ty - ny * minSize;
 
-  if (
+  if (arrowhead === "circle" || arrowhead === "circle_outline") {
-    arrowhead === "dot" ||
+    const diameter = Math.hypot(ys - ty, xs - tx) + element.strokeWidth - 2;
-    arrowhead === "circle" ||
+    return [tx, ty, diameter];
-    arrowhead === "circle_outline"
-  ) {
-    const diameter = Math.hypot(ys - y2, xs - x2) + element.strokeWidth - 2;
-    return [x2, y2, diameter];
   }
 
   const angle = getArrowheadAngle(arrowhead);
 
-  if (arrowhead === "crowfoot_many" || arrowhead === "crowfoot_one_or_many") {
+  if (
+    arrowhead === "cardinality_many" ||
+    arrowhead === "cardinality_one_or_many"
+  ) {
     // swap (xs, ys) with (x2, y2)
     const [x3, y3] = pointRotateRads(
-      pointFrom(x2, y2),
+      pointFrom(tx, ty),
       pointFrom(xs, ys),
       degreesToRadians(-angle as Degrees),
     );
     const [x4, y4] = pointRotateRads(
-      pointFrom(x2, y2),
+      pointFrom(tx, ty),
       pointFrom(xs, ys),
       degreesToRadians(angle),
     );
@@ -856,12 +869,12 @@ export const getArrowheadPoints = (
   // Return points
   const [x3, y3] = pointRotateRads(
     pointFrom(xs, ys),
-    pointFrom(x2, y2),
+    pointFrom(tx, ty),
     ((-angle * Math.PI) / 180) as Radians,
   );
   const [x4, y4] = pointRotateRads(
     pointFrom(xs, ys),
-    pointFrom(x2, y2),
+    pointFrom(tx, ty),
     degreesToRadians(angle),
   );
 
@@ -874,9 +887,9 @@ export const getArrowheadPoints = (
       const [px, py] = element.points.length > 1 ? element.points[1] : [0, 0];
 
       [ox, oy] = pointRotateRads(
-        pointFrom(x2 + minSize * 2, y2),
+        pointFrom(tx + minSize * 2, ty),
-        pointFrom(x2, y2),
+        pointFrom(tx, ty),
-        Math.atan2(py - y2, px - x2) as Radians,
+        Math.atan2(py - ty, px - tx) as Radians,
       );
     } else {
       const [px, py] =
@@ -885,16 +898,16 @@ export const getArrowheadPoints = (
           : [0, 0];
 
       [ox, oy] = pointRotateRads(
-        pointFrom(x2 - minSize * 2, y2),
+        pointFrom(tx - minSize * 2, ty),
-        pointFrom(x2, y2),
+        pointFrom(tx, ty),
-        Math.atan2(y2 - py, x2 - px) as Radians,
+        Math.atan2(ty - py, tx - px) as Radians,
       );
     }
 
-    return [x2, y2, x3, y3, ox, oy, x4, y4];
+    return [tx, ty, x3, y3, ox, oy, x4, y4];
   }
 
-  return [x2, y2, x3, y3, x4, y4];
+  return [tx, ty, x3, y3, x4, y4];
 };
 
 // TODO reuse shape.ts

packages/element/src/index.ts

@@ -99,3 +99,4 @@ export * from "./typeChecks";
 export * from "./utils";
 export * from "./zindex";
 export * from "./arrows/helpers";
+export * from "./arrowheads";

packages/element/src/shape.ts

@@ -69,10 +69,10 @@ import type {
   NonDeletedExcalidrawElement,
   ExcalidrawSelectionElement,
   ExcalidrawLinearElement,
-  Arrowhead,
   ExcalidrawFreeDrawElement,
   ElementsMap,
   ExcalidrawLineElement,
+  Arrowhead,
 } from "./types";
 
 import type { Drawable, Options } from "roughjs/bin/core";
@@ -296,6 +296,82 @@ const modifyIframeLikeForRoughOptions = (
   return element;
 };
 
+const generateArrowheadCardinalityOne = (
+  generator: RoughGenerator,
+  arrowheadPoints: number[] | null,
+  lineOptions: Options,
+) => {
+  if (arrowheadPoints === null) {
+    return [];
+  }
+
+  const [, , x3, y3, x4, y4] = arrowheadPoints;
+
+  return [generator.line(x3, y3, x4, y4, lineOptions)];
+};
+
+const generateArrowheadLinesToTip = (
+  generator: RoughGenerator,
+  arrowheadPoints: number[] | null,
+  lineOptions: Options,
+) => {
+  if (arrowheadPoints === null) {
+    return [];
+  }
+
+  const [x2, y2, x3, y3, x4, y4] = arrowheadPoints;
+
+  return [
+    generator.line(x3, y3, x2, y2, lineOptions),
+    generator.line(x4, y4, x2, y2, lineOptions),
+  ];
+};
+
+const getArrowheadLineOptions = (
+  element: ExcalidrawLinearElement,
+  options: Options,
+) => {
+  const lineOptions = { ...options };
+
+  if (element.strokeStyle === "dotted") {
+    // for dotted arrows caps, reduce gap to make it more legible
+    const dash = getDashArrayDotted(element.strokeWidth - 1);
+    lineOptions.strokeLineDash = [dash[0], dash[1] - 1];
+  } else {
+    // for solid/dashed, keep solid arrow cap
+    delete lineOptions.strokeLineDash;
+  }
+  lineOptions.roughness = Math.min(1, lineOptions.roughness || 0);
+
+  return lineOptions;
+};
+
+const generateArrowheadOutlineCircle = (
+  generator: RoughGenerator,
+  options: Options,
+  strokeColor: string,
+  arrowheadPoints: number[] | null,
+  fill: string,
+  diameterScale = 1,
+) => {
+  if (arrowheadPoints === null) {
+    return [];
+  }
+
+  const [x, y, diameter] = arrowheadPoints;
+  const circleOptions = {
+    ...options,
+    fill,
+    fillStyle: "solid" as const,
+    stroke: strokeColor,
+    roughness: Math.min(0.5, options.roughness || 0),
+  };
+
+  delete circleOptions.strokeLineDash;
+
+  return [generator.circle(x, y, diameter * diameterScale, circleOptions)];
+};
+
 const getArrowheadShapes = (
   element: ExcalidrawLinearElement,
   shape: Drawable[],
@@ -306,63 +382,54 @@ const getArrowheadShapes = (
   canvasBackgroundColor: string,
   isDarkMode: boolean,
 ) => {
-  const arrowheadPoints = getArrowheadPoints(
+  if (arrowhead === null) {
-    element,
-    shape,
-    position,
-    arrowhead,
-  );
-
-  if (arrowheadPoints === null) {
     return [];
   }
 
-  const generateCrowfootOne = (
-    arrowheadPoints: number[] | null,
-    options: Options,
-  ) => {
-    if (arrowheadPoints === null) {
-      return [];
-    }
-
-    const [, , x3, y3, x4, y4] = arrowheadPoints;
-
-    return [generator.line(x3, y3, x4, y4, options)];
-  };
-
   const strokeColor = isDarkMode
     ? applyDarkModeFilter(element.strokeColor)
     : element.strokeColor;
+  const backgroundFillColor = isDarkMode
+    ? applyDarkModeFilter(canvasBackgroundColor)
+    : canvasBackgroundColor;
+  const cardinalityOneOrManyOffset = -0.25;
+  const cardinalityZeroCircleScale = 0.8;
 
   switch (arrowhead) {
-    case "dot":
     case "circle":
     case "circle_outline": {
-      const [x, y, diameter] = arrowheadPoints;
+      return generateArrowheadOutlineCircle(
-
+        generator,
-      // always use solid stroke for arrowhead
+        options,
-      delete options.strokeLineDash;
+        strokeColor,
-
+        getArrowheadPoints(element, shape, position, arrowhead),
-      return [
+        arrowhead === "circle_outline" ? backgroundFillColor : strokeColor,
-        generator.circle(x, y, diameter, {
+      );
-          ...options,
-          fill:
-            arrowhead === "circle_outline"
-              ? canvasBackgroundColor
-              : strokeColor,
-
-          fillStyle: "solid",
-          stroke: strokeColor,
-          roughness: Math.min(0.5, options.roughness || 0),
-        }),
-      ];
     }
     case "triangle":
     case "triangle_outline": {
+      const arrowheadPoints = getArrowheadPoints(
+        element,
+        shape,
+        position,
+        arrowhead,
+      );
+
+      if (arrowheadPoints === null) {
+        return [];
+      }
+
       const [x, y, x2, y2, x3, y3] = arrowheadPoints;
+      const triangleOptions = {
+        ...options,
+        fill:
+          arrowhead === "triangle_outline" ? backgroundFillColor : strokeColor,
+        fillStyle: "solid" as const,
+        roughness: Math.min(1, options.roughness || 0),
+      };
 
       // always use solid stroke for arrowhead
-      delete options.strokeLineDash;
+      delete triangleOptions.strokeLineDash;
 
       return [
         generator.polygon(
@@ -372,24 +439,34 @@ const getArrowheadShapes = (
             [x3, y3],
             [x, y],
           ],
-          {
+          triangleOptions,
-            ...options,
-            fill:
-              arrowhead === "triangle_outline"
-                ? canvasBackgroundColor
-                : strokeColor,
-            fillStyle: "solid",
-            roughness: Math.min(1, options.roughness || 0),
-          },
         ),
       ];
     }
     case "diamond":
     case "diamond_outline": {
+      const arrowheadPoints = getArrowheadPoints(
+        element,
+        shape,
+        position,
+        arrowhead,
+      );
+
+      if (arrowheadPoints === null) {
+        return [];
+      }
+
       const [x, y, x2, y2, x3, y3, x4, y4] = arrowheadPoints;
+      const diamondOptions = {
+        ...options,
+        fill:
+          arrowhead === "diamond_outline" ? backgroundFillColor : strokeColor,
+        fillStyle: "solid" as const,
+        roughness: Math.min(1, options.roughness || 0),
+      };
 
       // always use solid stroke for arrowhead
-      delete options.strokeLineDash;
+      delete diamondOptions.strokeLineDash;
 
       return [
         generator.polygon(
@@ -400,46 +477,106 @@ const getArrowheadShapes = (
             [x4, y4],
             [x, y],
           ],
-          {
+          diamondOptions,
-            ...options,
+        ),
-            fill:
+      ];
-              arrowhead === "diamond_outline"
+    }
-                ? canvasBackgroundColor
+    case "cardinality_one":
-                : strokeColor,
+      return generateArrowheadCardinalityOne(
-            fillStyle: "solid",
+        generator,
-            roughness: Math.min(1, options.roughness || 0),
+        getArrowheadPoints(element, shape, position, arrowhead),
-          },
+        getArrowheadLineOptions(element, options),
+      );
+    case "cardinality_many":
+      return generateArrowheadLinesToTip(
+        generator,
+        getArrowheadPoints(element, shape, position, arrowhead),
+        getArrowheadLineOptions(element, options),
+      );
+    case "cardinality_one_or_many": {
+      const lineOptions = getArrowheadLineOptions(element, options);
+
+      return [
+        ...generateArrowheadLinesToTip(
+          generator,
+          getArrowheadPoints(element, shape, position, "cardinality_many"),
+          lineOptions,
+        ),
+        ...generateArrowheadCardinalityOne(
+          generator,
+          getArrowheadPoints(
+            element,
+            shape,
+            position,
+            "cardinality_one",
+            cardinalityOneOrManyOffset,
+          ),
+          lineOptions,
+        ),
+      ];
+    }
+    case "cardinality_exactly_one": {
+      const lineOptions = getArrowheadLineOptions(element, options);
+
+      return [
+        ...generateArrowheadCardinalityOne(
+          generator,
+          getArrowheadPoints(element, shape, position, "cardinality_one", -0.5),
+          lineOptions,
+        ),
+        ...generateArrowheadCardinalityOne(
+          generator,
+          getArrowheadPoints(element, shape, position, "cardinality_one"),
+          lineOptions,
+        ),
+      ];
+    }
+    case "cardinality_zero_or_one": {
+      const lineOptions = getArrowheadLineOptions(element, options);
+
+      return [
+        ...generateArrowheadOutlineCircle(
+          generator,
+          options,
+          strokeColor,
+          getArrowheadPoints(element, shape, position, "circle_outline", 1.5),
+          backgroundFillColor,
+          cardinalityZeroCircleScale,
+        ),
+        ...generateArrowheadCardinalityOne(
+          generator,
+          getArrowheadPoints(element, shape, position, "cardinality_one", -0.5),
+          lineOptions,
+        ),
+      ];
+    }
+    case "cardinality_zero_or_many": {
+      const lineOptions = getArrowheadLineOptions(element, options);
+
+      return [
+        ...generateArrowheadLinesToTip(
+          generator,
+          getArrowheadPoints(element, shape, position, "cardinality_many"),
+          lineOptions,
+        ),
+        ...generateArrowheadOutlineCircle(
+          generator,
+          options,
+          strokeColor,
+          getArrowheadPoints(element, shape, position, "circle_outline", 1.5),
+          backgroundFillColor,
+          cardinalityZeroCircleScale,
         ),
       ];
     }
-    case "crowfoot_one":
-      return generateCrowfootOne(arrowheadPoints, options);
     case "bar":
     case "arrow":
-    case "crowfoot_many":
-    case "crowfoot_one_or_many":
     default: {
-      const [x2, y2, x3, y3, x4, y4] = arrowheadPoints;
+      return generateArrowheadLinesToTip(
-
+        generator,
-      if (element.strokeStyle === "dotted") {
+        getArrowheadPoints(element, shape, position, arrowhead),
-        // for dotted arrows caps, reduce gap to make it more legible
+        getArrowheadLineOptions(element, options),
-        const dash = getDashArrayDotted(element.strokeWidth - 1);
+      );
-        options.strokeLineDash = [dash[0], dash[1] - 1];
-      } else {
-        // for solid/dashed, keep solid arrow cap
-        delete options.strokeLineDash;
-      }
-      options.roughness = Math.min(1, options.roughness || 0);
-      return [
-        generator.line(x3, y3, x2, y2, options),
-        generator.line(x4, y4, x2, y2, options),
-        ...(arrowhead === "crowfoot_one_or_many"
-          ? generateCrowfootOne(
-              getArrowheadPoints(element, shape, position, "crowfoot_one"),
-              options,
-            )
-          : []),
-      ];
     }
   }
 };

packages/element/src/types.ts

@@ -303,19 +303,32 @@ export type PointsPositionUpdates = Map<
   { point: LocalPoint; isDragging?: boolean }
 >;
 
+export type CardinalityArrowhead =
+  | "cardinality_one"
+  | "cardinality_many"
+  | "cardinality_one_or_many"
+  | "cardinality_exactly_one"
+  | "cardinality_zero_or_one"
+  | "cardinality_zero_or_many";
+
+export type ArrowheadLegacy =
+  | "dot"
+  | "crowfoot_one"
+  | "crowfoot_many"
+  | "crowfoot_one_or_many";
+
 export type Arrowhead =
   | "arrow"
   | "bar"
-  | "dot" // legacy. Do not use for new elements.
   | "circle"
   | "circle_outline"
   | "triangle"
   | "triangle_outline"
   | "diamond"
   | "diamond_outline"
-  | "crowfoot_one"
+  | CardinalityArrowhead;
-  | "crowfoot_many"
+
-  | "crowfoot_one_or_many";
+export type AnyArrowhead = Arrowhead | ArrowheadLegacy;
 
 export type ExcalidrawLinearElement = _ExcalidrawElementBase &
   Readonly<{

packages/excalidraw/actions/actionExport.tsx

@@ -399,7 +399,7 @@ export const actionSaveFileToDisk = register({
         appState: {
           openDialog: null,
           fileHandle: savedFileHandle,
-          toast: { message: t("toast.fileSaved") },
+          toast: { message: t("toast.fileSaved"), duration: 3000 },
         },
       };
     } catch (error: any) {

packages/excalidraw/actions/actionProperties.tsx

@@ -36,6 +36,7 @@ import {
 import { LinearElementEditor } from "@excalidraw/element";
 
 import { newElementWith } from "@excalidraw/element";
+import { getArrowheadForPicker } from "@excalidraw/element";
 
 import {
   getBoundTextElement,
@@ -124,9 +125,12 @@ import {
   sharpArrowIcon,
   roundArrowIcon,
   elbowArrowIcon,
-  ArrowheadCrowfootIcon,
+  ArrowheadCardinalityExactlyOneIcon,
-  ArrowheadCrowfootOneIcon,
+  ArrowheadCardinalityManyIcon,
-  ArrowheadCrowfootOneOrManyIcon,
+  ArrowheadCardinalityOneIcon,
+  ArrowheadCardinalityOneOrManyIcon,
+  ArrowheadCardinalityZeroOrManyIcon,
+  ArrowheadCardinalityZeroOrOneIcon,
 } from "../components/icons";
 
 import { Fonts } from "../fonts";
@@ -1550,80 +1554,117 @@ export const actionChangeRoundness = register<"sharp" | "round">({
 });
 
 const getArrowheadOptions = (flip: boolean) => {
-  return [
+  return {
-    {
+    visibleSections: [
-      value: null,
+      {
-      text: t("labels.arrowhead_none"),
+        name: "default",
-      keyBinding: "q",
+        options: [
-      icon: <ArrowheadNoneIcon flip={flip} />,
+          {
-    },
+            value: null,
-    {
+            text: t("labels.arrowhead_none"),
-      value: "arrow",
+            keyBinding: "q",
-      text: t("labels.arrowhead_arrow"),
+            icon: <ArrowheadNoneIcon flip={flip} />,
-      keyBinding: "w",
+          },
-      icon: <ArrowheadArrowIcon flip={flip} />,
+          {
-    },
+            value: "arrow",
-    {
+            text: t("labels.arrowhead_arrow"),
-      value: "triangle",
+            keyBinding: "w",
-      text: t("labels.arrowhead_triangle"),
+            icon: <ArrowheadArrowIcon flip={flip} />,
-      icon: <ArrowheadTriangleIcon flip={flip} />,
+          },
-      keyBinding: "e",
+          {
-    },
+            value: "triangle",
-    {
+            text: t("labels.arrowhead_triangle"),
-      value: "triangle_outline",
+            icon: <ArrowheadTriangleIcon flip={flip} />,
-      text: t("labels.arrowhead_triangle_outline"),
+            keyBinding: "e",
-      icon: <ArrowheadTriangleOutlineIcon flip={flip} />,
+          },
-      keyBinding: "r",
+          {
-    },
+            value: "triangle_outline",
-    {
+            text: t("labels.arrowhead_triangle_outline"),
-      value: "circle",
+            icon: <ArrowheadTriangleOutlineIcon flip={flip} />,
-      text: t("labels.arrowhead_circle"),
+            keyBinding: "r",
-      keyBinding: "a",
+          },
-      icon: <ArrowheadCircleIcon flip={flip} />,
+        ],
-    },
+      },
-    {
+    ],
-      value: "circle_outline",
+    hiddenSections: [
-      text: t("labels.arrowhead_circle_outline"),
+      {
-      keyBinding: "s",
+        name: "default",
-      icon: <ArrowheadCircleOutlineIcon flip={flip} />,
+        options: [
-    },
+          {
-    {
+            value: "circle",
-      value: "diamond",
+            text: t("labels.arrowhead_circle"),
-      text: t("labels.arrowhead_diamond"),
+            keyBinding: "a",
-      icon: <ArrowheadDiamondIcon flip={flip} />,
+            icon: <ArrowheadCircleIcon flip={flip} />,
-      keyBinding: "d",
+          },
-    },
+          {
-    {
+            value: "circle_outline",
-      value: "diamond_outline",
+            text: t("labels.arrowhead_circle_outline"),
-      text: t("labels.arrowhead_diamond_outline"),
+            keyBinding: "s",
-      icon: <ArrowheadDiamondOutlineIcon flip={flip} />,
+            icon: <ArrowheadCircleOutlineIcon flip={flip} />,
-      keyBinding: "f",
+          },
-    },
+          {
-    {
+            value: "diamond",
-      value: "bar",
+            text: t("labels.arrowhead_diamond"),
-      text: t("labels.arrowhead_bar"),
+            icon: <ArrowheadDiamondIcon flip={flip} />,
-      keyBinding: "z",
+            keyBinding: "d",
-      icon: <ArrowheadBarIcon flip={flip} />,
+          },
-    },
+          {
-    {
+            value: "diamond_outline",
-      value: "crowfoot_one",
+            text: t("labels.arrowhead_diamond_outline"),
-      text: t("labels.arrowhead_crowfoot_one"),
+            icon: <ArrowheadDiamondOutlineIcon flip={flip} />,
-      icon: <ArrowheadCrowfootOneIcon flip={flip} />,
+            keyBinding: "f",
-      keyBinding: "x",
+          },
-    },
+          {
-    {
+            value: "bar",
-      value: "crowfoot_many",
+            text: t("labels.arrowhead_bar"),
-      text: t("labels.arrowhead_crowfoot_many"),
+            keyBinding: "z",
-      icon: <ArrowheadCrowfootIcon flip={flip} />,
+            icon: <ArrowheadBarIcon flip={flip} />,
-      keyBinding: "c",
+          },
-    },
+        ],
-    {
+      },
-      value: "crowfoot_one_or_many",
+      {
-      text: t("labels.arrowhead_crowfoot_one_or_many"),
+        name: t("labels.cardinality"),
-      icon: <ArrowheadCrowfootOneOrManyIcon flip={flip} />,
+        options: [
-      keyBinding: "v",
+          {
-    },
+            value: "cardinality_one",
-  ] as const;
+            text: t("labels.arrowhead_cardinality_one"),
+            icon: <ArrowheadCardinalityOneIcon flip={flip} />,
+            keyBinding: "x",
+          },
+          {
+            value: "cardinality_many",
+            text: t("labels.arrowhead_cardinality_many"),
+            icon: <ArrowheadCardinalityManyIcon flip={flip} />,
+            keyBinding: "c",
+          },
+          {
+            value: "cardinality_one_or_many",
+            text: t("labels.arrowhead_cardinality_one_or_many"),
+            icon: <ArrowheadCardinalityOneOrManyIcon flip={flip} />,
+            keyBinding: "v",
+          },
+          {
+            value: "cardinality_exactly_one",
+            text: t("labels.arrowhead_cardinality_exactly_one"),
+            icon: <ArrowheadCardinalityExactlyOneIcon flip={flip} />,
+            keyBinding: null,
+          },
+          {
+            value: "cardinality_zero_or_one",
+            text: t("labels.arrowhead_cardinality_zero_or_one"),
+            icon: <ArrowheadCardinalityZeroOrOneIcon flip={flip} />,
+            keyBinding: null,
+          },
+          {
+            value: "cardinality_zero_or_many",
+            text: t("labels.arrowhead_cardinality_zero_or_many"),
+            icon: <ArrowheadCardinalityZeroOrManyIcon flip={flip} />,
+            keyBinding: null,
+          },
+        ],
+      },
+    ],
+  } as const;
 };
 
 export const actionChangeArrowhead = register<{
@@ -1667,45 +1708,52 @@ export const actionChangeArrowhead = register<{
   },
   PanelComponent: ({ elements, appState, updateData, app }) => {
     const isRTL = getLanguage().rtl;
+    const startArrowheadOptions = useMemo(
+      () => getArrowheadOptions(!isRTL),
+      [isRTL],
+    );
+    const endArrowheadOptions = useMemo(
+      () => getArrowheadOptions(!!isRTL),
+      [isRTL],
+    );
 
     return (
       <fieldset>
         <legend>{t("labels.arrowheads")}</legend>
         <div className="iconSelectList buttonList">
           <IconPicker
+            visibleSections={startArrowheadOptions.visibleSections}
+            hiddenSections={startArrowheadOptions.hiddenSections}
             label="arrowhead_start"
-            options={getArrowheadOptions(!isRTL)}
             value={getFormValue<Arrowhead | null>(
               elements,
               app,
               (element) =>
                 isLinearElement(element) && canHaveArrowheads(element.type)
-                  ? element.startArrowhead
+                  ? getArrowheadForPicker(element.startArrowhead)
                   : appState.currentItemStartArrowhead,
               true,
               (hasSelection) =>
                 hasSelection ? null : appState.currentItemStartArrowhead,
             )}
             onChange={(value) => updateData({ position: "start", type: value })}
-            numberOfOptionsToAlwaysShow={4}
           />
           <IconPicker
+            visibleSections={endArrowheadOptions.visibleSections}
+            hiddenSections={endArrowheadOptions.hiddenSections}
             label="arrowhead_end"
-            group="arrowheads"
-            options={getArrowheadOptions(!!isRTL)}
             value={getFormValue<Arrowhead | null>(
               elements,
               app,
               (element) =>
                 isLinearElement(element) && canHaveArrowheads(element.type)
-                  ? element.endArrowhead
+                  ? getArrowheadForPicker(element.endArrowhead)
                   : appState.currentItemEndArrowhead,
               true,
               (hasSelection) =>
                 hasSelection ? null : appState.currentItemEndArrowhead,
             )}
             onChange={(value) => updateData({ position: "end", type: value })}
-            numberOfOptionsToAlwaysShow={4}
           />
         </div>
       </fieldset>

packages/excalidraw/components/App.tsx

@@ -3703,7 +3703,7 @@ class App extends React.Component<AppProps, AppState> {
     if (!isPlainPaste && isMaybeMermaidDefinition(data.text)) {
       const api = await import("@excalidraw/mermaid-to-excalidraw");
       try {
-        const { elements: skeletonElements, files } =
+        const { elements: skeletonElements, files = {} } =
           await api.parseMermaidToExcalidraw(data.text);
 
         const elements = convertToExcalidrawElements(skeletonElements, {

packages/excalidraw/components/IconPicker.scss

@@ -6,7 +6,7 @@
     padding: 0.5rem;
     background: var(--popup-bg-color);
     border: 0 solid color.adjust(#fff, $alpha: -0.75);
-    box-shadow: var(--shadow-island);
+    box-shadow: var(--shadow-island-stronger);
     border-radius: 4px;
     position: absolute;
     :root[dir="rtl"] & {
@@ -14,6 +14,13 @@
     }
   }
 
+  .picker-sections,
+  .picker-section {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+  }
+
   .picker-container button,
   .picker button {
     position: relative;
@@ -62,7 +69,13 @@
 
   .picker-collapsible {
     font-size: 0.75rem;
-    padding: 0.5rem 0;
+    padding: 0;
+    color: var(--text-primary-color);
+  }
+
+  .picker-section-label {
+    font-size: 0.75rem;
+    color: var(--text-primary-color);
   }
 
   .picker-keybinding {

packages/excalidraw/components/IconPicker.tsx

@@ -1,6 +1,6 @@
 import { Popover } from "radix-ui";
 import clsx from "clsx";
-import React, { useEffect } from "react";
+import React, { useEffect, useMemo } from "react";
 
 import { isArrowKey, KEYS } from "@excalidraw/common";
 
@@ -15,6 +15,8 @@ import "./IconPicker.scss";
 import type { JSX } from "react";
 
 const moreOptionsAtom = atom(false);
+const PICKER_COLUMNS = 4;
+const DEFAULT_SECTION_NAME = "default";
 
 type Option<T> = {
   value: T;
@@ -23,28 +25,74 @@ type Option<T> = {
   keyBinding: string | null;
 };
 
+type PickerSection<T> = {
+  name: string;
+  options: readonly Option<T>[];
+};
+
+const flattenOptions = <T,>(sections: readonly PickerSection<T>[]) =>
+  sections.flatMap((section) => section.options);
+
+const findOption = <T,>(
+  sections: readonly PickerSection<T>[],
+  predicate: (option: Option<T>) => boolean,
+) => {
+  for (const section of sections) {
+    const option = section.options.find(predicate);
+    if (option) {
+      return option;
+    }
+  }
+
+  return null;
+};
+
+const hasOption = <T,>(
+  sections: readonly PickerSection<T>[],
+  predicate: (option: Option<T>) => boolean,
+) => sections.some((section) => section.options.some(predicate));
+
+const getNavigationRows = <T,>(sections: readonly PickerSection<T>[]) =>
+  sections.flatMap((section) =>
+    Array.from(
+      { length: Math.ceil(section.options.length / PICKER_COLUMNS) },
+      (_, index) =>
+        section.options.slice(
+          index * PICKER_COLUMNS,
+          index * PICKER_COLUMNS + PICKER_COLUMNS,
+        ),
+    ),
+  );
+
 function Picker<T>({
-  options,
+  visibleSections,
+  hiddenSections = [],
   value,
   label,
   onChange,
   onClose,
-  numberOfOptionsToAlwaysShow = options.length,
 }: {
   label: string;
   value: T;
-  options: readonly Option<T>[];
+  visibleSections: readonly PickerSection<T>[];
+  hiddenSections?: readonly PickerSection<T>[];
   onChange: (value: T) => void;
   onClose: () => void;
-  numberOfOptionsToAlwaysShow?: number;
 }) {
   const editorInterface = useEditorInterface();
   const { container } = useExcalidrawContainer();
+  const [showMoreOptions, setShowMoreOptions] = useAtom(moreOptionsAtom);
+  const allSections = [...visibleSections, ...hiddenSections];
+  const allOptions = flattenOptions(allSections);
+  const navigationRows = getNavigationRows([
+    ...visibleSections,
+    ...(showMoreOptions ? hiddenSections : []),
+  ]);
 
   const handleKeyDown = (event: React.KeyboardEvent) => {
-    const pressedOption = options.find(
+    const pressedOption = allOptions.find(
       (option) => option.keyBinding === event.key.toLowerCase(),
-    )!;
+    );
 
     if (!(event.metaKey || event.altKey || event.ctrlKey) && pressedOption) {
       // Keybinding navigation
@@ -52,17 +100,17 @@ function Picker<T>({
 
       event.preventDefault();
     } else if (event.key === KEYS.TAB) {
-      const index = options.findIndex((option) => option.value === value);
+      const index = allOptions.findIndex((option) => option.value === value);
       const nextIndex = event.shiftKey
-        ? (options.length + index - 1) % options.length
+        ? (allOptions.length + index - 1) % allOptions.length
-        : (index + 1) % options.length;
+        : (index + 1) % allOptions.length;
-      onChange(options[nextIndex].value);
+      onChange(allOptions[nextIndex].value);
     } else if (isArrowKey(event.key)) {
       // Arrow navigation
       const isRTL = getLanguage().rtl;
-      const index = options.findIndex((option) => option.value === value);
+      const index = allOptions.findIndex((option) => option.value === value);
       if (index !== -1) {
-        const length = options.length;
+        const length = allOptions.length;
         let nextIndex = index;
 
         switch (event.key) {
@@ -76,18 +124,60 @@ function Picker<T>({
             break;
           // Go the next row
           case KEYS.ARROW_DOWN: {
-            nextIndex = (index + (numberOfOptionsToAlwaysShow ?? 1)) % length;
+            const currentRowIndex = navigationRows.findIndex((row) =>
+              row.some((option) => option.value === value),
+            );
+            const currentRow = navigationRows[currentRowIndex];
+
+            if (currentRowIndex !== -1 && currentRow) {
+              const column = currentRow.findIndex(
+                (option) => option.value === value,
+              );
+              const nextRow =
+                navigationRows[(currentRowIndex + 1) % navigationRows.length];
+              const nextOption =
+                nextRow[Math.min(column, nextRow.length - 1)] ??
+                allOptions[index];
+
+              onChange(nextOption.value);
+              event.preventDefault();
+              event.nativeEvent.stopImmediatePropagation();
+              event.stopPropagation();
+              return;
+            }
             break;
           }
           // Go the previous row
           case KEYS.ARROW_UP: {
-            nextIndex =
+            const currentRowIndex = navigationRows.findIndex((row) =>
-              (length + index - (numberOfOptionsToAlwaysShow ?? 1)) % length;
+              row.some((option) => option.value === value),
+            );
+            const currentRow = navigationRows[currentRowIndex];
+
+            if (currentRowIndex !== -1 && currentRow) {
+              const column = currentRow.findIndex(
+                (option) => option.value === value,
+              );
+              const previousRow =
+                navigationRows[
+                  (navigationRows.length + currentRowIndex - 1) %
+                    navigationRows.length
+                ];
+              const previousOption =
+                previousRow[Math.min(column, previousRow.length - 1)] ??
+                allOptions[index];
+
+              onChange(previousOption.value);
+              event.preventDefault();
+              event.nativeEvent.stopImmediatePropagation();
+              event.stopPropagation();
+              return;
+            }
             break;
           }
         }
 
-        onChange(options[nextIndex].value);
+        onChange(allOptions[nextIndex].value);
       }
       event.preventDefault();
     } else if (event.key === KEYS.ESCAPE || event.key === KEYS.ENTER) {
@@ -99,38 +189,29 @@ function Picker<T>({
     event.stopPropagation();
   };
 
-  const [showMoreOptions, setShowMoreOptions] = useAtom(moreOptionsAtom);
-
-  const alwaysVisibleOptions = React.useMemo(
-    () => options.slice(0, numberOfOptionsToAlwaysShow),
-    [options, numberOfOptionsToAlwaysShow],
-  );
-  const moreOptions = React.useMemo(
-    () => options.slice(numberOfOptionsToAlwaysShow),
-    [options, numberOfOptionsToAlwaysShow],
-  );
-
   useEffect(() => {
-    if (!alwaysVisibleOptions.some((option) => option.value === value)) {
+    if (hasOption(hiddenSections, (option) => option.value === value)) {
       setShowMoreOptions(true);
     }
-  }, [value, alwaysVisibleOptions, setShowMoreOptions]);
+  }, [value, hiddenSections, setShowMoreOptions]);
 
-  const renderOptions = (options: Option<T>[]) => {
+  const renderOptions = (options: readonly Option<T>[]) => {
     return (
       <div className="picker-content">
-        {options.map((option, i) => (
+        {options.map((option) => (
           <button
             type="button"
             className={clsx("picker-option", {
               active: value === option.value,
             })}
-            onClick={(event) => {
+            onClick={() => {
               onChange(option.value);
             }}
-            title={`${option.text} ${
+            title={
-              option.keyBinding && `— ${option.keyBinding.toUpperCase()}`
+              option.keyBinding
-            }`}
+                ? `${option.text} — ${option.keyBinding.toUpperCase()}`
+                : option.text
+            }
             aria-label={option.text || "none"}
             aria-keyshortcuts={option.keyBinding || undefined}
             key={option.text}
@@ -153,6 +234,20 @@ function Picker<T>({
     );
   };
 
+  const renderSections = (sections: readonly PickerSection<T>[]) =>
+    sections.map((section, index) =>
+      section.name === DEFAULT_SECTION_NAME ? (
+        <React.Fragment key={`${section.name}-${index}`}>
+          {renderOptions(section.options)}
+        </React.Fragment>
+      ) : (
+        <div className="picker-section" key={`${section.name}-${index}`}>
+          <div className="picker-section-label">{section.name}</div>
+          {renderOptions(section.options)}
+        </div>
+      ),
+    );
+
   const isMobile = editorInterface.formFactor === "phone";
 
   return (
@@ -170,20 +265,24 @@ function Picker<T>({
         aria-modal="true"
         aria-label={label}
       >
-        {renderOptions(alwaysVisibleOptions)}
+        <div className="picker-sections">
+          {renderSections(visibleSections)}
 
-        {moreOptions.length > 0 && (
+          {hiddenSections.length > 0 && (
-          <Collapsible
+            <Collapsible
-            label={t("labels.more_options")}
+              label={t("labels.more_options")}
-            open={showMoreOptions}
+              open={showMoreOptions}
-            openTrigger={() => {
+              openTrigger={() => {
-              setShowMoreOptions((value) => !value);
+                setShowMoreOptions((value) => !value);
-            }}
+              }}
-            className="picker-collapsible"
+              className="picker-collapsible"
-          >
+            >
-            {renderOptions(moreOptions)}
+              <div className="picker-sections">
-          </Collapsible>
+                {renderSections(hiddenSections)}
-        )}
+              </div>
+            </Collapsible>
+          )}
+        </div>
       </div>
     </Popover.Content>
   );
@@ -192,49 +291,45 @@ function Picker<T>({
 export function IconPicker<T>({
   value,
   label,
-  options,
+  visibleSections,
+  hiddenSections,
   onChange,
-  group = "",
-  numberOfOptionsToAlwaysShow,
 }: {
   label: string;
   value: T;
-  options: readonly {
+  visibleSections: readonly PickerSection<T>[];
-    value: T;
+  hiddenSections?: readonly PickerSection<T>[];
-    text: string;
-    icon: JSX.Element;
-    keyBinding: string | null;
-  }[];
   onChange: (value: T) => void;
-  numberOfOptionsToAlwaysShow?: number;
-  group?: string;
 }) {
   const [isActive, setActive] = React.useState(false);
-  const rPickerButton = React.useRef<any>(null);
+  const selectedOption = useMemo(
+    () =>
+      findOption(visibleSections, (option) => option.value === value) ??
+      findOption(hiddenSections ?? [], (option) => option.value === value),
+    [visibleSections, hiddenSections, value],
+  );
 
   return (
     <div>
       <Popover.Root open={isActive} onOpenChange={(open) => setActive(open)}>
         <Popover.Trigger
-          name={group}
           type="button"
           aria-label={label}
           onClick={() => setActive(!isActive)}
-          ref={rPickerButton}
           className={isActive ? "active" : ""}
         >
-          {options.find((option) => option.value === value)?.icon}
+          {selectedOption?.icon}
         </Popover.Trigger>
         {isActive && (
           <Picker
-            options={options}
+            visibleSections={visibleSections}
+            hiddenSections={hiddenSections}
             value={value}
             label={label}
             onChange={onChange}
             onClose={() => {
               setActive(false);
             }}
-            numberOfOptionsToAlwaysShow={numberOfOptionsToAlwaysShow}
           />
         )}
       </Popover.Root>

packages/excalidraw/components/TTDDialog/MermaidToExcalidraw.tsx

@@ -236,15 +236,40 @@ const MermaidToExcalidraw = ({
         <Trans
           i18nKey="mermaid.description"
           flowchartLink={(el) => (
-            <a href="https://mermaid.js.org/syntax/flowchart.html">{el}</a>
+            <a
+              href="https://mermaid.js.org/syntax/flowchart.html"
+              target="_blank"
+              rel="noreferrer"
+            >
+              {el}
+            </a>
           )}
           sequenceLink={(el) => (
-            <a href="https://mermaid.js.org/syntax/sequenceDiagram.html">
+            <a
+              href="https://mermaid.js.org/syntax/sequenceDiagram.html"
+              target="_blank"
+              rel="noreferrer"
+            >
               {el}
             </a>
           )}
           classLink={(el) => (
-            <a href="https://mermaid.js.org/syntax/classDiagram.html">{el}</a>
+            <a
+              href="https://mermaid.js.org/syntax/classDiagram.html"
+              target="_blank"
+              rel="noreferrer"
+            >
+              {el}
+            </a>
+          )}
+          erdLink={(el) => (
+            <a
+              href="https://mermaid.js.org/syntax/entityRelationshipDiagram.html"
+              target="_blank"
+              rel="noreferrer"
+            >
+              {el}
+            </a>
           )}
         />
       </div>

packages/excalidraw/components/TTDDialog/common.ts

@@ -94,7 +94,7 @@ export const convertMermaidToExcalidraw = async ({
       }
     }
 
-    const { elements, files } = ret;
+    const { elements, files = {} } = ret;
     setError(null);
 
     data.current = {

packages/excalidraw/components/icons.tsx

@@ -69,6 +69,11 @@ const modifiedTablerIconProps: Opts = {
   strokeLinejoin: "round",
 } as const;
 
+const arrowheadPreviewIconProps: Opts = {
+  width: 40,
+  height: 20,
+} as const;
+
 // -----------------------------------------------------------------------------
 
 // tabler-icons: present
@@ -1291,16 +1296,17 @@ export const ArrowheadNoneIcon = React.memo(
   ({ flip = false }: { flip?: boolean }) =>
     createIcon(
       <g
-        transform={flip ? "translate(24, 0) scale(-1, 1)" : ""}
+        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
         stroke="currentColor"
         opacity={0.3}
         strokeWidth={2}
+        fill="none"
+        strokeLinecap="round"
       >
-        <path d="M12 12l-9 0" />
+        <path d="M7,11 H19" />
-        <path d="M21 9l-6 6" />
+        <path d="M25,6 L33,16 M33,6 L25,16" />
-        <path d="M21 15l-6 -6" />
       </g>,
-      tablerIconProps,
+      arrowheadPreviewIconProps,
     ),
 );
 
@@ -1312,57 +1318,12 @@ export const ArrowheadArrowIcon = React.memo(
         stroke="currentColor"
         strokeWidth={2}
         fill="none"
+        strokeLinecap="round"
+        strokeLinejoin="round"
       >
-        <path d="M34 10H6M34 10L27 5M34 10L27 15" />
+        <path d="M7,11 H33 M23,5 L33,11 L23,17" />
-        <path d="M27.5 5L34.5 10L27.5 15" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
-    ),
-);
-
-export const ArrowheadCircleIcon = React.memo(
-  ({ flip = false }: { flip?: boolean }) =>
-    createIcon(
-      <g
-        stroke="currentColor"
-        fill="currentColor"
-        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
-      >
-        <path d="M32 10L6 10" strokeWidth={2} />
-        <circle r="4" transform="matrix(-1 0 0 1 30 10)" />
-      </g>,
-      { width: 40, height: 20 },
-    ),
-);
-
-export const ArrowheadCircleOutlineIcon = React.memo(
-  ({ flip = false }: { flip?: boolean }) =>
-    createIcon(
-      <g
-        stroke="currentColor"
-        fill="none"
-        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
-        strokeWidth={2}
-      >
-        <path d="M26 10L6 10" />
-        <circle r="4" transform="matrix(-1 0 0 1 30 10)" />
-      </g>,
-      { width: 40, height: 20 },
-    ),
-);
-
-export const ArrowheadBarIcon = React.memo(
-  ({ flip = false }: { flip?: boolean }) =>
-    createIcon(
-      <g transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}>
-        <path
-          d="M34 10H5.99996M34 10L34 5M34 10L34 15"
-          stroke="currentColor"
-          strokeWidth={2}
-          fill="none"
-        />
-      </g>,
-      { width: 40, height: 20 },
     ),
 );
 
@@ -1373,11 +1334,12 @@ export const ArrowheadTriangleIcon = React.memo(
         stroke="currentColor"
         fill="currentColor"
         transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
+        strokeLinejoin="round"
       >
-        <path d="M32 10L6 10" strokeWidth={2} />
+        <path d="M7,11 H23" strokeWidth={2} strokeLinecap="round" />
-        <path d="M27.5 5.5L34.5 10L27.5 14.5L27.5 5.5" />
+        <path d="M23,5 L35,11 L23,17 Z" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
     ),
 );
 
@@ -1390,12 +1352,43 @@ export const ArrowheadTriangleOutlineIcon = React.memo(
         transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
         strokeWidth={2}
         strokeLinejoin="round"
+        strokeLinecap="round"
       >
-        <path d="M6,9.5H27" />
+        <path d="M7,11 H23" />
-        <path d="M27,5L34,10L27,14Z" fill="none" />
+        <path d="M23,5 L35,11 L23,17 Z" />
       </g>,
+      arrowheadPreviewIconProps,
+    ),
+);
 
-      { width: 40, height: 20 },
+export const ArrowheadCircleIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        stroke="currentColor"
+        fill="currentColor"
+        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
+      >
+        <path d="M7,11 H25" strokeWidth={2} strokeLinecap="round" />
+        <circle cx="29" cy="11" r="4" />
+      </g>,
+      arrowheadPreviewIconProps,
+    ),
+);
+
+export const ArrowheadCircleOutlineIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        stroke="currentColor"
+        fill="none"
+        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
+        strokeWidth={2}
+      >
+        <path d="M7,11 H25" strokeLinecap="round" />
+        <circle cx="29" cy="11" r="4" />
+      </g>,
+      arrowheadPreviewIconProps,
     ),
 );
 
@@ -1407,12 +1400,11 @@ export const ArrowheadDiamondIcon = React.memo(
         fill="currentColor"
         transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
         strokeLinejoin="round"
-        strokeWidth={2}
       >
-        <path d="M6,9.5H20" />
+        <path d="M7,11 H21" strokeWidth={2} strokeLinecap="round" />
-        <path d="M27,5L34,10L27,14L20,9.5Z" />
+        <path d="M21,11 L28,5 L35,11 L28,17 Z" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
     ),
 );
 
@@ -1425,15 +1417,32 @@ export const ArrowheadDiamondOutlineIcon = React.memo(
         transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
         strokeLinejoin="round"
         strokeWidth={2}
+        strokeLinecap="round"
       >
-        <path d="M6,9.5H20" />
+        <path d="M7,11 H21" />
-        <path d="M27,5L34,10L27,14L20,9.5Z" />
+        <path d="M21,11 L28,5 L35,11 L28,17 Z" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
     ),
 );
 
-export const ArrowheadCrowfootIcon = React.memo(
+export const ArrowheadBarIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        transform={flip ? "translate(40, 0) scale(-1, 1)" : ""}
+        stroke="currentColor"
+        strokeWidth={2}
+        fill="none"
+        strokeLinecap="round"
+      >
+        <path d="M11,11 H31 M31,5 V17" />
+      </g>,
+      arrowheadPreviewIconProps,
+    ),
+);
+
+export const ArrowheadCardinalityOneIcon = React.memo(
   ({ flip = false }: { flip?: boolean }) =>
     createIcon(
       <g
@@ -1443,13 +1452,13 @@ export const ArrowheadCrowfootIcon = React.memo(
         strokeLinejoin="round"
         strokeWidth={2}
       >
-        <path d="M34,10 H6 M15,10 L7,5 M15,10 L7,15" />
+        <path d="M35,11 H7 M15,5 V17" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
     ),
 );
 
-export const ArrowheadCrowfootOneIcon = React.memo(
+export const ArrowheadCardinalityManyIcon = React.memo(
   ({ flip = false }: { flip?: boolean }) =>
     createIcon(
       <g
@@ -1459,13 +1468,13 @@ export const ArrowheadCrowfootOneIcon = React.memo(
         strokeLinejoin="round"
         strokeWidth={2}
       >
-        <path d="M34,10 H6 M15,10 L15,15 L15,5" />
+        <path d="M35,11 H7 M15,11 L7,5 M15,11 L7,17" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
     ),
 );
 
-export const ArrowheadCrowfootOneOrManyIcon = React.memo(
+export const ArrowheadCardinalityOneOrManyIcon = React.memo(
   ({ flip = false }: { flip?: boolean }) =>
     createIcon(
       <g
@@ -1475,9 +1484,59 @@ export const ArrowheadCrowfootOneOrManyIcon = React.memo(
         strokeLinejoin="round"
         strokeWidth={2}
       >
-        <path d="M34,10 H6 M15,10 L15,16 L15,4 M15,10 L7,5 M15,10 L7,15" />
+        <path d="M35,11 H7 M23,5 V17 M15,11 L7,5 M15,11 L7,17" />
       </g>,
-      { width: 40, height: 20 },
+      arrowheadPreviewIconProps,
+    ),
+);
+
+export const ArrowheadCardinalityExactlyOneIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        stroke="currentColor"
+        fill="none"
+        transform={flip ? "" : "translate(40, 0) scale(-1, 1)"}
+        strokeLinejoin="round"
+        strokeWidth={2}
+      >
+        <path d="M35,11 H7 M15,5 V17 M7,5 V17" />
+      </g>,
+      arrowheadPreviewIconProps,
+    ),
+);
+
+export const ArrowheadCardinalityZeroOrOneIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        stroke="currentColor"
+        fill="none"
+        transform={flip ? "" : "translate(40, 0) scale(-1, 1)"}
+        strokeLinejoin="round"
+        strokeWidth={2}
+      >
+        <path d="M35,11 H19 M11,11 H7 M7,5 V17" />
+        <circle cx="15" cy="11" r="4" />
+      </g>,
+      arrowheadPreviewIconProps,
+    ),
+);
+
+export const ArrowheadCardinalityZeroOrManyIcon = React.memo(
+  ({ flip = false }: { flip?: boolean }) =>
+    createIcon(
+      <g
+        stroke="currentColor"
+        fill="none"
+        transform={flip ? "" : "translate(40, 0) scale(-1, 1)"}
+        strokeLinejoin="round"
+        strokeWidth={2}
+      >
+        <path d="M35,11 H27 M19,11 H7 M15,11 L7,5 M15,11 L7,17" />
+        <circle cx="23" cy="11" r="4" />
+      </g>,
+      arrowheadPreviewIconProps,
     ),
 );
 

packages/excalidraw/css/theme.scss

@@ -34,9 +34,10 @@
   --popup-text-color: #000;
   --popup-text-inverted-color: #fff;
   --select-highlight-color: #{$color-blue-5};
-  --shadow-island: 0px 0px 0.9310142993927002px 0px rgba(0, 0, 0, 0.17),
+  --shadow-island: 0px 0px 1px 0px rgba(0, 0, 0, 0.17),
-    0px 0px 3.1270833015441895px 0px rgba(0, 0, 0, 0.08),
+    0px 0px 3px 0px rgba(0, 0, 0, 0.08), 0px 7px 14px 0px rgba(0, 0, 0, 0.05);
-    0px 7px 14px 0px rgba(0, 0, 0, 0.05);
+  --shadow-island-stronger: 0px 0px 1px 0px rgba(0, 0, 0, 0.17),
+    0px 0px 3px 0px rgba(0, 0, 0, 0.08), 0px 7px 14px 0px rgb(0 0 0 / 18%);
 
   --button-hover-bg: var(--color-surface-high);
   --button-active-bg: var(--color-surface-high);
@@ -210,9 +211,6 @@
     --popup-text-color: #{$color-gray-4};
     --popup-text-inverted-color: #2c2c2c;
     --select-highlight-color: #{$color-blue-4};
-    --shadow-island: 0px 0px 0.9310142993927002px 0px rgba(0, 0, 0, 0.17),
-      0px 0px 3.1270833015441895px 0px rgba(0, 0, 0, 0.08),
-      0px 7px 14px 0px rgba(0, 0, 0, 0.05);
 
     --modal-shadow: 0px 100px 80px rgba(0, 0, 0, 0.07),
       0px 41.7776px 33.4221px rgba(0, 0, 0, 0.0503198),

packages/excalidraw/data/restore.ts

@@ -22,6 +22,7 @@ import {
 import {
   calculateFixedPointForNonElbowArrowBinding,
   getNonDeletedElements,
+  normalizeArrowhead,
   isPointInElement,
   isValidPolygon,
   projectFixedPointOntoDiagonal,
@@ -426,7 +427,8 @@ export const restoreElement = (
     // @ts-ignore LEGACY type
     // eslint-disable-next-line no-fallthrough
     case "draw":
-      const { startArrowhead = null, endArrowhead = null } = element;
+      const startArrowhead = normalizeArrowhead(element.startArrowhead);
+      const endArrowhead = normalizeArrowhead(element.endArrowhead);
       let x = element.x;
       let y = element.y;
       let points = // migrate old arrow model to new one
@@ -458,7 +460,11 @@ export const restoreElement = (
         ...getSizeFromPoints(points),
       });
     case "arrow": {
-      const { startArrowhead = null, endArrowhead = "arrow" } = element;
+      const startArrowhead = normalizeArrowhead(element.startArrowhead);
+      const endArrowhead =
+        element.endArrowhead === undefined
+          ? "arrow"
+          : normalizeArrowhead(element.endArrowhead);
       const x: number | undefined = element.x;
       const y: number | undefined = element.y;
       const points: readonly LocalPoint[] | undefined = // migrate old arrow model to new one

packages/excalidraw/locales/en.json

@@ -53,7 +53,14 @@
     "arrowhead_crowfoot_many": "Crow's foot (many)",
     "arrowhead_crowfoot_one": "Crow's foot (one)",
     "arrowhead_crowfoot_one_or_many": "Crow's foot (one or many)",
+    "arrowhead_cardinality_one": "Cardinality (one)",
+    "arrowhead_cardinality_many": "Cardinality (many)",
+    "arrowhead_cardinality_one_or_many": "Cardinality (one or many)",
+    "arrowhead_cardinality_exactly_one": "Cardinality (exactly one)",
+    "arrowhead_cardinality_zero_or_one": "Cardinality (zero or one)",
+    "arrowhead_cardinality_zero_or_many": "Cardinality (zero or many)",
     "more_options": "More options",
+    "cardinality": "Cardinality",
     "arrowtypes": "Arrow type",
     "arrowtype_sharp": "Sharp arrow",
     "arrowtype_round": "Curved arrow",
@@ -624,7 +631,7 @@
   "mermaid": {
     "title": "Mermaid to Excalidraw",
     "button": "Insert",
-    "description": "Currently only <flowchartLink>Flowchart</flowchartLink>,<sequenceLink> Sequence, </sequenceLink> and <classLink>Class </classLink>Diagrams are supported. The other types will be rendered as image in Excalidraw.",
+    "description": "Currently only <flowchartLink>Flowchart</flowchartLink>, <sequenceLink>Sequence</sequenceLink>, <classLink>Class</classLink>, and <erdLink>Entity Relationship</erdLink> Diagrams are supported. The other types will be rendered as image in Excalidraw.",
     "syntax": "Mermaid Syntax",
     "preview": "Preview",
     "label": "Mermaid",
@@ -654,7 +661,7 @@
     "placeholder": {
       "title": "Let's design your diagram",
       "description": "Describe the diagram you want to create, and we'll generate it for you.",
-      "hint": "At the moment we know Flowchart, Sequence, and Class diagrams."
+      "hint": "At the moment we know Flowchart, Sequence, Class, and Entity Relationship diagrams."
     },
     "preview": "Preview",
     "insert": "Insert",

packages/excalidraw/package.json

@@ -88,7 +88,7 @@
     "@excalidraw/element": "0.18.0",
     "@excalidraw/laser-pointer": "1.3.1",
     "@excalidraw/math": "0.18.0",
-    "@excalidraw/mermaid-to-excalidraw": "2.0.0-rc4",
+    "@excalidraw/mermaid-to-excalidraw": "2.1.0",
     "@excalidraw/random-username": "1.1.0",
     "browser-fs-access": "0.38.0",
     "canvas-roundrect-polyfill": "0.0.1",

packages/excalidraw/tests/__snapshots__/MermaidToExcalidraw.test.tsx.snap

@@ -1,6 +1,6 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`Test <MermaidToExcalidraw/> > should open mermaid popup when active tool is mermaid 1`] = `"<div class="Modal Dialog ttd-dialog" role="dialog" aria-modal="true" aria-labelledby="dialog-title"><div class="Modal__background"></div><div class="Modal__content" style="--max-width: 1520px;" tabindex="0"><div class="Island"><div class="Dialog__content"><div dir="ltr" data-orientation="horizontal" class="ttd-dialog-tabs-root"><p class="dialog-mermaid-title">Mermaid to Excalidraw</p><div data-state="active" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-:r4:-trigger-mermaid" id="radix-:r4:-content-mermaid" tabindex="0" class="ttd-dialog-content" style=""><div class="ttd-dialog-desc">Currently only <a href="https://mermaid.js.org/syntax/flowchart.html">Flowchart</a>,<a href="https://mermaid.js.org/syntax/sequenceDiagram.html"> Sequence, </a> and <a href="https://mermaid.js.org/syntax/classDiagram.html">Class </a>Diagrams are supported. The other types will be rendered as image in Excalidraw.</div><div class="ttd-dialog-panels"><div class="ttd-dialog-panel"><div class="ttd-dialog-panel-button-container invisible" style="justify-content: flex-start;"></div></div><div class="ttd-dialog-panel"><div class="ttd-dialog-output-wrapper "><div class="ttd-dialog-output-canvas-container"><div class="ttd-dialog-output-canvas-content"><canvas width="89" height="158" dir="ltr"></canvas></div></div></div><div class="ttd-dialog-panel-button-container" style="justify-content: flex-start;"><button type="button" class="excalidraw-button ttd-dialog-panel-button"><div class="">Insert<span><svg aria-hidden="true" focusable="false" role="img" viewBox="0 0 20 20" class="" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"><g stroke-width="1.25"><path d="M4.16602 10H15.8327"></path><path d="M12.5 13.3333L15.8333 10"></path><path d="M12.5 6.66666L15.8333 9.99999"></path></g></svg></span></div></button><div class="ttd-dialog-submit-shortcut"><div class="ttd-dialog-submit-shortcut__key">Ctrl</div><div class="ttd-dialog-submit-shortcut__key">Enter</div></div></div></div></div></div></div></div></div></div></div>"`;
+exports[`Test <MermaidToExcalidraw/> > should open mermaid popup when active tool is mermaid 1`] = `"<div class="Modal Dialog ttd-dialog" role="dialog" aria-modal="true" aria-labelledby="dialog-title"><div class="Modal__background"></div><div class="Modal__content" style="--max-width: 1520px;" tabindex="0"><div class="Island"><div class="Dialog__content"><div dir="ltr" data-orientation="horizontal" class="ttd-dialog-tabs-root"><p class="dialog-mermaid-title">Mermaid to Excalidraw</p><div data-state="active" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-:r4:-trigger-mermaid" id="radix-:r4:-content-mermaid" tabindex="0" class="ttd-dialog-content" style=""><div class="ttd-dialog-desc">Currently only <a href="https://mermaid.js.org/syntax/flowchart.html" target="_blank" rel="noreferrer">Flowchart</a>, <a href="https://mermaid.js.org/syntax/sequenceDiagram.html" target="_blank" rel="noreferrer">Sequence</a>, <a href="https://mermaid.js.org/syntax/classDiagram.html" target="_blank" rel="noreferrer">Class</a>, and <a href="https://mermaid.js.org/syntax/entityRelationshipDiagram.html" target="_blank" rel="noreferrer">Entity Relationship</a> Diagrams are supported. The other types will be rendered as image in Excalidraw.</div><div class="ttd-dialog-panels"><div class="ttd-dialog-panel"><div class="ttd-dialog-panel-button-container invisible" style="justify-content: flex-start;"></div></div><div class="ttd-dialog-panel"><div class="ttd-dialog-output-wrapper "><div class="ttd-dialog-output-canvas-container"><div class="ttd-dialog-output-canvas-content"><canvas width="89" height="158" dir="ltr"></canvas></div></div></div><div class="ttd-dialog-panel-button-container" style="justify-content: flex-start;"><button type="button" class="excalidraw-button ttd-dialog-panel-button"><div class="">Insert<span><svg aria-hidden="true" focusable="false" role="img" viewBox="0 0 20 20" class="" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"><g stroke-width="1.25"><path d="M4.16602 10H15.8327"></path><path d="M12.5 13.3333L15.8333 10"></path><path d="M12.5 6.66666L15.8333 9.99999"></path></g></svg></span></div></button><div class="ttd-dialog-submit-shortcut"><div class="ttd-dialog-submit-shortcut__key">Ctrl</div><div class="ttd-dialog-submit-shortcut__key">Enter</div></div></div></div></div></div></div></div></div></div></div>"`;
 
 exports[`Test <MermaidToExcalidraw/> > should show error in preview when mermaid library throws error 1`] = `
 "flowchart TD

packages/excalidraw/tests/data/restore.test.ts

@@ -200,6 +200,26 @@ describe("restoreElements", () => {
     });
   });
 
+  it("should normalize legacy crowfoot arrowheads on restore", () => {
+    const arrowElement = API.createElement({
+      type: "arrow",
+    });
+
+    const restoredArrow = restore.restoreElements(
+      [
+        {
+          ...arrowElement,
+          startArrowhead: "crowfoot_one",
+          endArrowhead: "crowfoot_one_or_many",
+        } as any,
+      ],
+      null,
+    )[0] as ExcalidrawLinearElement;
+
+    expect(restoredArrow.startArrowhead).toBe("cardinality_one");
+    expect(restoredArrow.endArrowhead).toBe("cardinality_one_or_many");
+  });
+
   it("should strip element if restore fails", () => {
     const rect1 = API.createElement({
       type: "rectangle",

yarn.lock

@@ -1531,10 +1531,10 @@
   resolved "https://registry.yarnpkg.com/@excalidraw/markdown-to-text/-/markdown-to-text-0.1.2.tgz#1703705e7da608cf478f17bfe96fb295f55a23eb"
   integrity sha512-1nDXBNAojfi3oSFwJswKREkFm5wrSjqay81QlyRv2pkITG/XYB5v+oChENVBQLcxQwX4IUATWvXM5BcaNhPiIg==
 
-"@excalidraw/mermaid-to-excalidraw@2.0.0-rc4":
+"@excalidraw/mermaid-to-excalidraw@2.1.0":
-  version "2.0.0-rc4"
+  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/@excalidraw/mermaid-to-excalidraw/-/mermaid-to-excalidraw-2.0.0-rc4.tgz#9d38568de8e403fefb6a162efa71e024ea1f7e03"
+  resolved "https://registry.yarnpkg.com/@excalidraw/mermaid-to-excalidraw/-/mermaid-to-excalidraw-2.1.0.tgz#a5b9cf87c3185558cda7f9687d87b9937f452358"
-  integrity sha512-92efu7VTYF6appGKgbDJAZEM/YXICpYPYOfl+j1E9SVilIFCJEAg7xH2lt/c44WFtffG+rWKrYwf9KUrPYy1Qw==
+  integrity sha512-RMd+c2b7WzzUjhERMpKwp8PhF2/XlHDjr/zK+Gxfp8K9sVlafPYJ5OEa/GkN6edi2rBUXRfW+41WdO6L56b6Kw==
   dependencies:
     "@excalidraw/markdown-to-text" "0.1.2"
     "@mermaid-js/parser" "^0.6.3"