Fixes #133

web/cm_plugins/wiki_link.ts

@@ -40,15 +40,37 @@ export function cleanWikiLinkPlugin(editor: Editor) {
             if (type.name !== "WikiLink") {
               return;
             }
-            if (isCursorInRange(view.state, [from, to])) {
-              return;
-            }
 
             const text = view.state.sliceDoc(from, to);
             const match = pageLinkRegex.exec(text);
             if (!match) return;
             const [_fullMatch, page, pipePart, alias] = match;
 
+            const allPages = editor.space.listPages();
+            let pageExists = false;
+            let cleanPage = page;
+            if (page.includes("@")) {
+              cleanPage = page.split("@")[0];
+            }
+            for (const pageMeta of allPages) {
+              if (pageMeta.name === cleanPage) {
+                pageExists = true;
+                break;
+              }
+            }
+
+            if (isCursorInRange(view.state, [from, to])) {
+              // Only attach a CSS class, then get out
+              if (!pageExists) {
+                widgets.push(
+                  Decoration.mark({
+                    class: "sb-wiki-link-page-missing",
+                  }).range(from + 2, from + page.length + 2),
+                );
+              }
+              return;
+            }
+
             // Hide the whole thing
             widgets.push(
               invisibleDecoration.range(
@@ -68,8 +90,10 @@ export function cleanWikiLinkPlugin(editor: Editor) {
               Decoration.widget({
                 widget: new LinkWidget(
                   linkText,
-                  page,
-                  "sb-wiki-link-page",
+                  pageExists ? `Navigate to ${page}` : `Create ${page}`,
+                  pageExists
+                    ? "sb-wiki-link-page"
+                    : "sb-wiki-link-page-missing",
                   (e) => {
                     if (e.altKey) {
                       // Move cursor into the link

web/styles/theme.scss

@@ -348,6 +348,15 @@
   text-decoration: none;
   cursor: pointer;
 }
+.sb-wiki-link-page-missing, .sb-wiki-link-page-missing > .sb-wiki-link-page {
+  color: #9e4705;
+  background-color: rgba(77, 141, 255, 0.07);
+  border-radius: 5px;
+  padding: 0 5px;
+  white-space: nowrap;
+  text-decoration: none;
+  cursor: pointer;
+}
 
 .sb-wiki-link {
   cursor: pointer;

website/CHANGELOG.md

@@ -7,6 +7,7 @@ release.
 
 * New page link aliasing syntax (Obsidian compatible) is here: `[[page link|alias]]` e.g. [[CHANGELOG|this is a link to this changelog]]. Also supported for command links: `{[Plugs: Add|add a plug]}`
 * Less "floppy" behavior when clicking links (regular, wiki and command): just navigates there right away. Note: use `Alt-click` to move the cursor inside of a link.
+* Page reference to non-existing pages are now higlighted in a (red-ish) color
 * Added `invokeFunction` `silverbullet` CLI sub-command to run arbitrary plug functions from the CLI.
 
 ---