feat(editor): add link preview to footnote popup (#9869)

[BS-2399](https://linear.app/affine-design/issue/BS-2399/ai-link-的预览支持：获取-fav-icon-标题)

blocksuite/affine/components/src/rich-text/inline/adapters/markdown/markdown-inline.ts

@@ -173,7 +173,7 @@ export const markdownFootnoteReferenceToDeltaMatcher =
         };
         return [{ insert: ' ', attributes: { footnote } }];
       } catch (error) {
-        console.error('Error parsing footnote reference', error);
+        console.warn('Error parsing footnote reference', error);
         return [];
       }
     },

blocksuite/affine/components/src/rich-text/inline/presets/nodes/footnote-node/footnote-node.ts

@@ -15,6 +15,7 @@ import {
   ZERO_WIDTH_NON_JOINER,
   ZERO_WIDTH_SPACE,
 } from '@blocksuite/inline';
+import { shift } from '@floating-ui/dom';
 import { baseTheme } from '@toeverything/theme';
 import { css, html, nothing, unsafeCSS } from 'lit';
 import { property } from 'lit/decorators.js';
@@ -129,6 +130,7 @@ export class AffineFootnoteNode extends WithDisposable(ShadowlessElement) {
           referenceElement: this,
           placement: 'top',
           autoUpdate: true,
+          middleware: [shift()],
         },
       };
     },

blocksuite/affine/components/src/rich-text/inline/presets/nodes/footnote-node/footnote-popup-chip.ts

@@ -26,9 +26,11 @@ export class FootNotePopupChip extends LitElement {
       color: ${unsafeCSSVarV2('icon/primary')};
       border-radius: 4px;
 
-      svg {
+      svg,
+      object {
         width: 16px;
         height: 16px;
+        fill: ${unsafeCSSVarV2('icon/primary')};
       }
     }
 
@@ -59,7 +61,7 @@ export class FootNotePopupChip extends LitElement {
               ${this.prefixIcon}
             </div>`
           : nothing}
-        <div class="popup-chip-label">${this.label}</div>
+        <div class="popup-chip-label" title=${this.tooltip}>${this.label}</div>
         ${this.suffixIcon
           ? html`<div class="suffix-icon" @click=${this.onSuffixClick}>
               ${this.suffixIcon}
@@ -78,6 +80,9 @@ export class FootNotePopupChip extends LitElement {
   @property({ attribute: false })
   accessor suffixIcon: TemplateResult | undefined = undefined;
 
+  @property({ attribute: false })
+  accessor tooltip: string = '';
+
   @property({ attribute: false })
   accessor onClick: (() => void) | undefined = undefined;
 

blocksuite/affine/components/src/rich-text/inline/presets/nodes/footnote-node/footnote-popup.ts

@@ -1,16 +1,26 @@
-import type { FootNote } from '@blocksuite/affine-model';
-import { DocDisplayMetaProvider } from '@blocksuite/affine-shared/services';
+import { ColorScheme, type FootNote } from '@blocksuite/affine-model';
+import {
+  DocDisplayMetaProvider,
+  LinkPreviewerService,
+  ThemeProvider,
+} from '@blocksuite/affine-shared/services';
 import { unsafeCSSVar, unsafeCSSVarV2 } from '@blocksuite/affine-shared/theme';
 import type { BlockStdScope } from '@blocksuite/block-std';
-import { WithDisposable } from '@blocksuite/global/utils';
+import { SignalWatcher, WithDisposable } from '@blocksuite/global/utils';
 import { DualLinkIcon, LinkIcon } from '@blocksuite/icons/lit';
+import { computed, signal } from '@preact/signals-core';
 import { css, html, LitElement, type TemplateResult } from 'lit';
 import { property } from 'lit/decorators.js';
 
-import { getAttachmentFileIcon } from '../../../../../icons';
+import {
+  DarkLoadingIcon,
+  getAttachmentFileIcon,
+  LightLoadingIcon,
+  WebIcon16,
+} from '../../../../../icons';
 import { RefNodeSlotsProvider } from '../../../../extension/ref-node-slots';
 
-export class FootNotePopup extends WithDisposable(LitElement) {
+export class FootNotePopup extends SignalWatcher(WithDisposable(LitElement)) {
   static override styles = css`
     .footnote-popup-container {
       border-radius: 4px;
@@ -21,7 +31,13 @@ export class FootNotePopup extends WithDisposable(LitElement) {
     }
   `;
 
-  private readonly _prefixIcon = () => {
+  private readonly _isLoading$ = signal(false);
+
+  private readonly _linkPreview$ = signal<
+    { favicon: string | undefined; title?: string } | undefined
+  >({ favicon: undefined, title: undefined });
+
+  private readonly _prefixIcon$ = computed(() => {
     const referenceType = this.footnote.reference.type;
     if (referenceType === 'doc') {
       const docId = this.footnote.reference.docId;
@@ -35,9 +51,31 @@ export class FootNotePopup extends WithDisposable(LitElement) {
         return undefined;
       }
       return getAttachmentFileIcon(fileType);
+    } else if (referenceType === 'url') {
+      if (this._isLoading$.value) {
+        return this._LoadingIcon();
+      }
+
+      const favicon = this._linkPreview$.value?.favicon;
+      if (!favicon) {
+        return undefined;
+      }
+
+      const titleIconType =
+        favicon.split('.').pop() === 'svg'
+          ? 'svg+xml'
+          : favicon.split('.').pop();
+      const titleIcon = html`<object
+        type="image/${titleIconType}"
+        data=${favicon}
+        draggable="false"
+      >
+        ${WebIcon16}
+      </object>`;
+      return titleIcon;
     }
     return undefined;
-  };
+  });
 
   private readonly _suffixIcon = (): TemplateResult | undefined => {
     const referenceType = this.footnote.reference.type;
@@ -49,7 +87,7 @@ export class FootNotePopup extends WithDisposable(LitElement) {
     return undefined;
   };
 
-  private readonly _popupLabel = () => {
+  private readonly _popupLabel$ = computed(() => {
     const referenceType = this.footnote.reference.type;
     let label = '';
     const { docId, fileName, url } = this.footnote.reference;
@@ -70,11 +108,23 @@ export class FootNotePopup extends WithDisposable(LitElement) {
         if (!url) {
           return label;
         }
-        // TODO(@chen): get url title from url, need to implement after LinkPreviewer refactored as an extension
-        label = url;
+        label = this._linkPreview$.value?.title ?? url;
         break;
     }
     return label;
+  });
+
+  private readonly _tooltip$ = computed(() => {
+    const referenceType = this.footnote.reference.type;
+    if (referenceType === 'url') {
+      return this.footnote.reference.url ?? '';
+    }
+    return this._popupLabel$.value;
+  });
+
+  private readonly _LoadingIcon = () => {
+    const theme = this.std.get(ThemeProvider).theme;
+    return theme === ColorScheme.Light ? LightLoadingIcon : DarkLoadingIcon;
   };
 
   /**
@@ -103,14 +153,35 @@ export class FootNotePopup extends WithDisposable(LitElement) {
     this.abortController.abort();
   };
 
+  override connectedCallback() {
+    super.connectedCallback();
+    if (this.footnote.reference.type === 'url' && this.footnote.reference.url) {
+      this._isLoading$.value = true;
+      this.std.store
+        .get(LinkPreviewerService)
+        .query(this.footnote.reference.url)
+        .then(data => {
+          this._linkPreview$.value = {
+            favicon: data.icon ?? undefined,
+            title: data.title ?? undefined,
+          };
+        })
+        .catch(console.error)
+        .finally(() => {
+          this._isLoading$.value = false;
+        });
+    }
+  }
+
   override render() {
     return html`
       <div class="footnote-popup-container">
         <footnote-popup-chip
-          .prefixIcon=${this._prefixIcon()}
-          .label=${this._popupLabel()}
+          .prefixIcon=${this._prefixIcon$.value}
+          .label=${this._popupLabel$.value}
           .suffixIcon=${this._suffixIcon()}
           .onClick=${this._onChipClick}
+          .tooltip=${this._tooltip$.value}
         ></footnote-popup-chip>
       </div>
     `;