feat: Support mermaid flowchart and sequence diagrams to excalidraw diagrams 🥳 (#6920)

* feat: integrate mermaidToExcalidraw

* create mermaid to excal dialog

* allow mermaid syntax and export in preview

* fix

* fix webpack config

* fix markdown error by using named export

* center preview

* set elements as selected when inserted onto canvas

* persist mermaid data to storage

* store canvas data in refs

* load mermaid lazily

* tweak design

* compute width, height correctly for arrows

* fix undefined vertex issue

* add mermaid icon in dropdown

* add a note in dialog

* reset preview when error

* show error in preview when error

* show mermaid error messgae react way

* design tweaks

* add example and docs link

* fix

* tweak design to remove scroll bar

* show a spinner unless mermaid loaded

* regenerate ids when needed via programmatic api, this makes sure for mermaid diagrams ids are regenerated

* tweak

* add option to transform viewport to scene coords in transform api

* make opts optional and use 100% zoom when inserting to canvas

* fix arrow bindings in safari and firefox

* fix elements insert position and viewport centering

* fix: Update start/end points by 0.5 so bindings don't overlap with start/end bound element coordinates.

* defer rendering the preview

* tweak text

* fix tests

* remove only

* make design responsive

* fix: show extra tools dropdown in mobile

* fix mobile css

* width auto

* upgrade mermaid-to-excalidraw

* don't pass appState in deps as its not used

* upgrade mermaid-to-excalidraw to fix firefox issue

* use types from mermaid-to-excalidraw

* upgrade mermaid-to-excalidraw

* use stable version of mermaid-to-excalidraw

* upgrade mermaid-to-excalidraw

* fix width of shapes toolbar for smaller screen size and also fix regression of mobile menu

* use i18n

* better api

* enable test coverage in ui

* Add tests

* use common utils to update and get text editor

* updgrade mermaid-to-excalidraw to support sequence diagrams

* fix test

* don't update arrow container height anytime in when redrawing text bounding box

* increase size limit

* increase size limit of vendor to 900kb

* use openDialog for mermaid

* upgrade mermaid-to-excalidraw

* update frame id post generation

* upgrade mermaid-to-excalidraw to add entity codes support

* update size limit

* upgrade mermaid-to-excalidraw package with frame api changes

* upgrade mermaid-to-excalidraw to remove directive and use config

* don't highlight mermaid tool and remove unused api setSelection

* stop using loading state to update text area

* move some styling to scss

* review fixes

* use modifiedTableIcon props and remove stale snap

* css

* dialog css

* fix snap

* use dialog border

* change mermaidToExcalidrawLib to state

* better styling of errors

* make modal bigger

* fix mobile

* update snaps

* fix icon color

* fix dark mode insert button color

* horizontally center spinner

* render canvas conditionally on loaded state

* rd tweaks

* tweak class names

* remove max height

* typo in example

* upgrade mermaid-to-excalidraw

* simplify error state

* fix height & overflow on vertical breakpoint

* fix lint

* show errors in overlay

* set textarea font family

* reduce opacity

* update snap

* upgrade to mermaid  0.1.2

---------

Co-authored-by: dwelle <luzar.david@gmail.com>

src/components/App.tsx

@@ -366,6 +366,7 @@ import { isSidebarDockedAtom } from "./Sidebar/Sidebar";
 import { StaticCanvas, InteractiveCanvas } from "./canvases";
 import { Renderer } from "../scene/Renderer";
 import { ShapeCache } from "../scene/ShapeCache";
+import MermaidToExcalidraw from "./MermaidToExcalidraw";
 import { LaserToolOverlay } from "./LaserTool/LaserTool";
 import { LaserPathManager } from "./LaserTool/LaserPathManager";
 import {
@@ -1245,7 +1246,11 @@ class App extends React.Component<AppProps, AppState> {
                           isCollaborating={this.props.isCollaborating}
                         >
                           {this.props.children}
+                          {this.state.openDialog === "mermaid" && (
+                            <MermaidToExcalidraw />
+                          )}
                         </LayerUI>
+
                         <div className="excalidraw-textEditorContainer" />
                         <div className="excalidraw-contextMenuContainer" />
                         <div className="excalidraw-eye-dropper-container" />
@@ -2324,11 +2329,12 @@ class App extends React.Component<AppProps, AppState> {
     },
   );
 
-  private addElementsFromPasteOrLibrary = (opts: {
+  addElementsFromPasteOrLibrary = (opts: {
     elements: readonly ExcalidrawElement[];
     files: BinaryFiles | null;
     position: { clientX: number; clientY: number } | "cursor" | "center";
     retainSeed?: boolean;
+    fitToContent?: boolean;
   }) => {
     const elements = restoreElements(opts.elements, null, undefined);
     const [minX, minY, maxX, maxY] = getCommonBounds(elements);
@@ -2433,6 +2439,12 @@ class App extends React.Component<AppProps, AppState> {
       },
     );
     this.setActiveTool({ type: "selection" });
+
+    if (opts.fitToContent) {
+      this.scrollToContent(newElements, {
+        fitToContent: true,
+      });
+    }
   };
 
   // TODO rewrite this to paste both text & images at the same time if
@@ -3308,6 +3320,10 @@ class App extends React.Component<AppProps, AppState> {
     });
   };
 
+  setOpenDialog = (dialogType: AppState["openDialog"]) => {
+    this.setState({ openDialog: dialogType });
+  };
+
   private setCursor = (cursor: string) => {
     setCursor(this.interactiveCanvas, cursor);
   };
@@ -4258,6 +4274,7 @@ class App extends React.Component<AppProps, AppState> {
       scenePointer.x,
       scenePointer.y,
     );
+
     this.hitLinkElement = this.getElementLinkAtPosition(
       scenePointer,
       hitElement,