refactor: packages/

1 files changed, 342 insertions, 0 deletions

diff --git a/packages/excalidraw/components/LibraryMenuItems.tsx b/packages/excalidraw/components/LibraryMenuItems.tsx
new file mode 100644
index 0000000..aa2c3e6
--- /dev/null
+++ b/packages/excalidraw/components/LibraryMenuItems.tsx
@@ -0,0 +1,342 @@
+import React, {
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from "react";
+import { serializeLibraryAsJSON } from "../data/json";
+import { t } from "../i18n";
+import type {
+  ExcalidrawProps,
+  LibraryItem,
+  LibraryItems,
+  UIAppState,
+} from "../types";
+import { arrayToMap } from "../utils";
+import Stack from "./Stack";
+import { MIME_TYPES } from "../constants";
+import Spinner from "./Spinner";
+import { duplicateElements } from "../element/newElement";
+import { LibraryMenuControlButtons } from "./LibraryMenuControlButtons";
+import { LibraryDropdownMenu } from "./LibraryMenuHeaderContent";
+import {
+  LibraryMenuSection,
+  LibraryMenuSectionGrid,
+} from "./LibraryMenuSection";
+import { useScrollPosition } from "../hooks/useScrollPosition";
+import { useLibraryCache } from "../hooks/useLibraryItemSvg";
+
+import "./LibraryMenuItems.scss";
+
+// using an odd number of items per batch so the rendering creates an irregular
+// pattern which looks more organic
+const ITEMS_RENDERED_PER_BATCH = 17;
+// when render outputs cached we can render many more items per batch to
+// speed it up
+const CACHED_ITEMS_RENDERED_PER_BATCH = 64;
+
+export default function LibraryMenuItems({
+  isLoading,
+  libraryItems,
+  onAddToLibrary,
+  onInsertLibraryItems,
+  pendingElements,
+  theme,
+  id,
+  libraryReturnUrl,
+  onSelectItems,
+  selectedItems,
+}: {
+  isLoading: boolean;
+  libraryItems: LibraryItems;
+  pendingElements: LibraryItem["elements"];
+  onInsertLibraryItems: (libraryItems: LibraryItems) => void;
+  onAddToLibrary: (elements: LibraryItem["elements"]) => void;
+  libraryReturnUrl: ExcalidrawProps["libraryReturnUrl"];
+  theme: UIAppState["theme"];
+  id: string;
+  selectedItems: LibraryItem["id"][];
+  onSelectItems: (id: LibraryItem["id"][]) => void;
+}) {
+  const libraryContainerRef = useRef<HTMLDivElement>(null);
+  const scrollPosition = useScrollPosition<HTMLDivElement>(libraryContainerRef);
+
+  // This effect has to be called only on first render, therefore  `scrollPosition` isn't in the dependency array
+  useEffect(() => {
+    if (scrollPosition > 0) {
+      libraryContainerRef.current?.scrollTo(0, scrollPosition);
+    }
+  }, []); // eslint-disable-line react-hooks/exhaustive-deps
+
+  const { svgCache } = useLibraryCache();
+  const unpublishedItems = useMemo(
+    () => libraryItems.filter((item) => item.status !== "published"),
+    [libraryItems],
+  );
+
+  const publishedItems = useMemo(
+    () => libraryItems.filter((item) => item.status === "published"),
+    [libraryItems],
+  );
+
+  const showBtn = !libraryItems.length && !pendingElements.length;
+
+  const isLibraryEmpty =
+    !pendingElements.length &&
+    !unpublishedItems.length &&
+    !publishedItems.length;
+
+  const [lastSelectedItem, setLastSelectedItem] = useState<
+    LibraryItem["id"] | null
+  >(null);
+
+  const onItemSelectToggle = useCallback(
+    (id: LibraryItem["id"], event: React.MouseEvent) => {
+      const shouldSelect = !selectedItems.includes(id);
+
+      const orderedItems = [...unpublishedItems, ...publishedItems];
+
+      if (shouldSelect) {
+        if (event.shiftKey && lastSelectedItem) {
+          const rangeStart = orderedItems.findIndex(
+            (item) => item.id === lastSelectedItem,
+          );
+          const rangeEnd = orderedItems.findIndex((item) => item.id === id);
+
+          if (rangeStart === -1 || rangeEnd === -1) {
+            onSelectItems([...selectedItems, id]);
+            return;
+          }
+
+          const selectedItemsMap = arrayToMap(selectedItems);
+          const nextSelectedIds = orderedItems.reduce(
+            (acc: LibraryItem["id"][], item, idx) => {
+              if (
+                (idx >= rangeStart && idx <= rangeEnd) ||
+                selectedItemsMap.has(item.id)
+              ) {
+                acc.push(item.id);
+              }
+              return acc;
+            },
+            [],
+          );
+
+          onSelectItems(nextSelectedIds);
+        } else {
+          onSelectItems([...selectedItems, id]);
+        }
+        setLastSelectedItem(id);
+      } else {
+        setLastSelectedItem(null);
+        onSelectItems(selectedItems.filter((_id) => _id !== id));
+      }
+    },
+    [
+      lastSelectedItem,
+      onSelectItems,
+      publishedItems,
+      selectedItems,
+      unpublishedItems,
+    ],
+  );
+
+  const getInsertedElements = useCallback(
+    (id: string) => {
+      let targetElements;
+      if (selectedItems.includes(id)) {
+        targetElements = libraryItems.filter((item) =>
+          selectedItems.includes(item.id),
+        );
+      } else {
+        targetElements = libraryItems.filter((item) => item.id === id);
+      }
+      return targetElements.map((item) => {
+        return {
+          ...item,
+          // duplicate each library item before inserting on canvas to confine
+          // ids and bindings to each library item. See #6465
+          elements: duplicateElements(item.elements, { randomizeSeed: true }),
+        };
+      });
+    },
+    [libraryItems, selectedItems],
+  );
+
+  const onItemDrag = useCallback(
+    (id: LibraryItem["id"], event: React.DragEvent) => {
+      event.dataTransfer.setData(
+        MIME_TYPES.excalidrawlib,
+        serializeLibraryAsJSON(getInsertedElements(id)),
+      );
+    },
+    [getInsertedElements],
+  );
+
+  const isItemSelected = useCallback(
+    (id: LibraryItem["id"] | null) => {
+      if (!id) {
+        return false;
+      }
+
+      return selectedItems.includes(id);
+    },
+    [selectedItems],
+  );
+
+  const onAddToLibraryClick = useCallback(() => {
+    onAddToLibrary(pendingElements);
+  }, [pendingElements, onAddToLibrary]);
+
+  const onItemClick = useCallback(
+    (id: LibraryItem["id"] | null) => {
+      if (id) {
+        onInsertLibraryItems(getInsertedElements(id));
+      }
+    },
+    [getInsertedElements, onInsertLibraryItems],
+  );
+
+  const itemsRenderedPerBatch =
+    svgCache.size >= libraryItems.length
+      ? CACHED_ITEMS_RENDERED_PER_BATCH
+      : ITEMS_RENDERED_PER_BATCH;
+
+  return (
+    <div
+      className="library-menu-items-container"
+      style={
+        pendingElements.length ||
+        unpublishedItems.length ||
+        publishedItems.length
+          ? { justifyContent: "flex-start" }
+          : { borderBottom: 0 }
+      }
+    >
+      {!isLibraryEmpty && (
+        <LibraryDropdownMenu
+          selectedItems={selectedItems}
+          onSelectItems={onSelectItems}
+          className="library-menu-dropdown-container--in-heading"
+        />
+      )}
+      <Stack.Col
+        className="library-menu-items-container__items"
+        align="start"
+        gap={1}
+        style={{
+          flex: publishedItems.length > 0 ? 1 : "0 1 auto",
+          marginBottom: 0,
+        }}
+        ref={libraryContainerRef}
+      >
+        <>
+          {!isLibraryEmpty && (
+            <div className="library-menu-items-container__header">
+              {t("labels.personalLib")}
+            </div>
+          )}
+          {isLoading && (
+            <div
+              style={{
+                position: "absolute",
+                top: "var(--container-padding-y)",
+                right: "var(--container-padding-x)",
+                transform: "translateY(50%)",
+              }}
+            >
+              <Spinner />
+            </div>
+          )}
+          {!pendingElements.length && !unpublishedItems.length ? (
+            <div className="library-menu-items__no-items">
+              <div className="library-menu-items__no-items__label">
+                {t("library.noItems")}
+              </div>
+              <div className="library-menu-items__no-items__hint">
+                {publishedItems.length > 0
+                  ? t("library.hint_emptyPrivateLibrary")
+                  : t("library.hint_emptyLibrary")}
+              </div>
+            </div>
+          ) : (
+            <LibraryMenuSectionGrid>
+              {pendingElements.length > 0 && (
+                <LibraryMenuSection
+                  itemsRenderedPerBatch={itemsRenderedPerBatch}
+                  items={[{ id: null, elements: pendingElements }]}
+                  onItemSelectToggle={onItemSelectToggle}
+                  onItemDrag={onItemDrag}
+                  onClick={onAddToLibraryClick}
+                  isItemSelected={isItemSelected}
+                  svgCache={svgCache}
+                />
+              )}
+              <LibraryMenuSection
+                itemsRenderedPerBatch={itemsRenderedPerBatch}
+                items={unpublishedItems}
+                onItemSelectToggle={onItemSelectToggle}
+                onItemDrag={onItemDrag}
+                onClick={onItemClick}
+                isItemSelected={isItemSelected}
+                svgCache={svgCache}
+              />
+            </LibraryMenuSectionGrid>
+          )}
+        </>
+
+        <>
+          {(publishedItems.length > 0 ||
+            pendingElements.length > 0 ||
+            unpublishedItems.length > 0) && (
+            <div className="library-menu-items-container__header library-menu-items-container__header--excal">
+              {t("labels.excalidrawLib")}
+            </div>
+          )}
+          {publishedItems.length > 0 ? (
+            <LibraryMenuSectionGrid>
+              <LibraryMenuSection
+                itemsRenderedPerBatch={itemsRenderedPerBatch}
+                items={publishedItems}
+                onItemSelectToggle={onItemSelectToggle}
+                onItemDrag={onItemDrag}
+                onClick={onItemClick}
+                isItemSelected={isItemSelected}
+                svgCache={svgCache}
+              />
+            </LibraryMenuSectionGrid>
+          ) : unpublishedItems.length > 0 ? (
+            <div
+              style={{
+                margin: "1rem 0",
+                display: "flex",
+                flexDirection: "column",
+                alignItems: "center",
+                justifyContent: "center",
+                width: "100%",
+                fontSize: ".9rem",
+              }}
+            >
+              {t("library.noItems")}
+            </div>
+          ) : null}
+        </>
+
+        {showBtn && (
+          <LibraryMenuControlButtons
+            style={{ padding: "16px 0", width: "100%" }}
+            id={id}
+            libraryReturnUrl={libraryReturnUrl}
+            theme={theme}
+          >
+            <LibraryDropdownMenu
+              selectedItems={selectedItems}
+              onSelectItems={onSelectItems}
+            />
+          </LibraryMenuControlButtons>
+        )}
+      </Stack.Col>
+    </div>
+  );
+}