fix: issue with source mod and double rendering (#425)

src/@types/obsidian.d.ts

@@ -1,4 +1,4 @@
-import { TAbstractFile, TFile, View, WorkspaceLeaf } from 'obsidian';
+import { TAbstractFile, TFile, View, ViewState, WorkspaceLeaf } from 'obsidian';
 
 interface InternalPlugin {
   enabled: boolean;
@@ -82,10 +82,18 @@ interface DomChild {
   containerEl: HTMLElement;
 }
 
+interface ExplorerViewState extends ViewState {
+  state: {
+    source: boolean; // true if source view is active
+  };
+}
+
 interface ExplorerView extends View {
   fileItems: Record<string, FileItem>; // keyed by path
   ready: boolean; // true if fileItems is populated
   file?: TFile;
+  getViewState(): ExplorerViewState;
+  getMode(): 'source' | 'preview';
   dom: { children: DomChild[]; changed: () => void };
 }
 

src/editor/live-preview/state.ts

@@ -10,6 +10,7 @@ import {
 } from '@codemirror/state';
 import IconFolderPlugin from '@app/main';
 import emoji from '@app/emoji';
+import { ExplorerViewState } from '@app/@types/obsidian';
 
 export type PositionField = StateField<RangeSet<IconPosition>>;
 
@@ -54,6 +55,13 @@ export const buildPositionField = (plugin: IconFolderPlugin) => {
     excludeTo: number,
     updateRange: UpdateRangeFunc,
   ): void => {
+    const isSourceMode = (
+      plugin.app.workspace.getLeaf().getViewState() as ExplorerViewState
+    )?.state?.source;
+    if (isSourceMode) {
+      return;
+    }
+
     const text = state.doc.sliceString(0, state.doc.length);
     const identifier = plugin.getSettings().iconIdentifier;
     const regex = new RegExp(