Implement new slash commands and enhance editor functionality

- Added slash commands for inserting today's, yesterday's, and tomorrow's dates.
- Introduced new admonition commands for notes and warnings.
- Implemented a table command for quick table insertion.
- Enhanced the `insertAtCursor` function to support a cursor placeholder option.
- Updated `getSelection` to return the selected text along with cursor positions.
- Added a new widget function to display linked tasks in the editor.

Library/Std.md

@@ -1,3 +1,5 @@
+#meta
+
 This is the start of the standard library distributed as part of SilverBullet core. All pages under this prefix are read-only.
 
 ${template.each(query[[

Library/Std/Date.md

@@ -27,6 +27,27 @@ end
 function date.time()
   return os.date(date.time_format)
 end
+
+slashcommand.define {
+  name = "today",
+  run = function()
+    editor.insertAtCursor(date.today())
+  end
+}
+
+slashcommand.define {
+  name = "yesterday",
+  run = function()
+    editor.insertAtCursor(date.yesterday())
+  end
+}
+
+slashcommand.define {
+  name = "tomorrow",
+  run = function()
+    editor.insertAtCursor(date.tomorrow())
+  end
+}
 ```
 
 # Examples

Library/Std/Pages/Quick Notes.md

@@ -0,0 +1,7 @@
+This is your ${widgets.commandButton("Quick Note")} inbox.
+
+${template.each(query[[
+  from index.tag "page"
+  where _.name:startsWith("Inbox/")
+  order by _.lastModified desc
+]], templates.fullPageItem)}

Library/Std/Query Templates.md

@@ -8,6 +8,11 @@ templates.pageItem = template.new([==[
 * [[${name}]]
 ]==])
 
+-- Renders a page object as a linked list item with full path
+templates.fullPageItem = template.new([==[
+* [[${name}|${name}]]
+]==])
+
 -- Renders a task object as a togglable task
 templates.taskItem = template.new([==[
 * [${state}] [[${ref}]] ${name}

Library/Std/Slash.md

@@ -58,4 +58,44 @@ slashcommand.define {
     editor.replaceRange(line.from, line.to, ws .. "* [ ] " .. rest, true)
   end
 }
+
+slashcommand.define {
+  name = "hr",
+  run = function()
+    editor.insertAtCursor("---\n")
+  end
+}
+
+slashcommand.define {
+  name = "note-admonition",
+  run = function()
+    editor.insertAtCursor([==[
+> **note** Note
+> |^|
+]==], false, true)
+  end
+}
+
+slashcommand.define {
+  name = "warning-admonition",
+  run = function()
+    editor.insertAtCursor([==[
+> **warning** Warning
+> |^|
+]==], false, true)
+  end
+}
+
+slashcommand.define {
+  name = "table",
+  exceptContexts = {"FencedCode"},
+  run = function()
+    editor.insertAtCursor([==[
+| Header A | Header B |
+|----------|----------|
+| Cell A|^| | Cell B |
+]==], false, true)
+  end
+}
+
 ```

Library/Std/Widgets.md

@@ -123,8 +123,8 @@ local mentionTemplate = template.new [==[
 * [[${_.ref}]]: “${_.snippet}”
 ]==]
 
-function widgets.linkedMentions()
-  local pageName = editor.getCurrentPage()
+function widgets.linkedMentions(pageName)
+  pageName = pageName or editor.getCurrentPage()
   local linkedMentions = query[[
     from index.tag "link"
     where _.page != pageName and _.toPage == pageName
@@ -145,3 +145,33 @@ event.listen {
   end
 }
 ```
+
+# Linked tasks
+```space-lua
+function widgets.linkedTasks(pageName)
+  pageName = pageName or editor.getCurrentPage()
+  local tasks = query[[
+    from index.tag "task"
+    where not _.done
+      and string.find(_.name, "[[" .. pageName .. "]]", 1, true)
+  ]]
+  local md = ""
+  if #tasks > 0 then
+    md = "# Linked Tasks\n"
+       .. template.each(tasks, templates.taskItem)
+  else
+    md = ""
+  end
+  return widget.new {
+    markdown = md
+  }
+end
+
+event.listen {
+  name = "hooks:renderTopWidgets",
+  run = function(e)
+    print("Linked tasks")
+    return widgets.linkedTasks()
+  end
+}
+```

common/space_lua/runtime.ts

@@ -282,13 +282,15 @@ export class LuaNativeJSFunction implements ILuaFunction {
   constructor(readonly fn: (...args: JSValue[]) => JSValue) {
   }
 
-  // Performs automatic conversion between Lua and JS values
+  // Performs automatic conversion between Lua and JS values for arguments, but not for return values
   call(sf: LuaStackFrame, ...args: LuaValue[]): Promise<LuaValue> | LuaValue {
-    const result = this.fn(...args.map((v) => luaValueToJS(v, sf)));
-    if (result instanceof Promise) {
-      return result.then(jsToLuaValue);
+    const evaluatedArgs = evalPromiseValues(
+      args.map((v) => luaValueToJS(v, sf)),
+    );
+    if (evaluatedArgs instanceof Promise) {
+      return evaluatedArgs.then((args) => this.fn(...args));
     } else {
-      return jsToLuaValue(result);
+      return this.fn(...evaluatedArgs);
     }
   }
 

common/space_lua/stdlib/js.ts

@@ -1,6 +1,7 @@
 import {
   jsToLuaValue,
   LuaBuiltinFunction,
+  LuaNativeJSFunction,
   LuaTable,
   luaValueToJS,
 } from "$common/space_lua/runtime.ts";
@@ -75,4 +76,10 @@ export const jsApi = new LuaTable({
   createTextNode: new LuaBuiltinFunction((_sf, text) =>
     document.createTextNode(text)
   ),
+  Blob: new LuaNativeJSFunction((
+    blobParts: any[],
+    options: BlobPropertyBag,
+  ) => {
+    return new Blob(blobParts, options);
+  }),
 });

plug-api/syscalls/editor.ts

@@ -70,7 +70,9 @@ export function getCursor(): Promise<number> {
 /**
  * Returns the line number and column number of the cursor in the editor
  */
-export function getSelection(): Promise<{ from: number; to: number }> {
+export function getSelection(): Promise<
+  { from: number; to: number; text: string }
+> {
   return syscall("editor.getSelection");
 }
 
@@ -299,8 +301,14 @@ export function moveCursorToLine(
 export function insertAtCursor(
   text: string,
   scrollIntoView = false,
+  cursorPlaceHolder = false,
 ): Promise<void> {
-  return syscall("editor.insertAtCursor", text, scrollIntoView);
+  return syscall(
+    "editor.insertAtCursor",
+    text,
+    scrollIntoView,
+    cursorPlaceHolder,
+  );
 }
 
 /**

web/syscalls/editor.ts

@@ -59,8 +59,17 @@ export function editorSyscalls(client: Client): SysCallMapping {
     "editor.getCursor": (): number => {
       return client.editorView.state.selection.main.from;
     },
-    "editor.getSelection": (): { from: number; to: number } => {
-      return client.editorView.state.selection.main;
+    "editor.getSelection": (): { from: number; to: number; text: string } => {
+      const selection = client.editorView.state.selection.main;
+      const text = client.editorView.state.sliceDoc(
+        selection.from,
+        selection.to,
+      );
+      return {
+        from: selection.from,
+        to: selection.to,
+        text,
+      };
     },
     "editor.save": () => {
       return client.save(true);

website/Library/Core/New Page/Page Template.md

@@ -1,12 +0,0 @@
----
-description: Create a New Page template
-tags: template
-hooks.newPage:
-  suggestedName: "Library/Personal/New Page/"
-  confirmName: true
-frontmatter: |
-  tags: template
-  displayName: "|^|"
-  hooks.newPage:
-    suggestedName: ""
----

website/Library/Core/New Page/Snippet Template.md

@@ -1,11 +0,0 @@
----
-tags: template
-description: Create a new Snippet template
-hooks.newPage:
-  suggestedName: Library/Personal/Snippet/
-  confirmName: true
-frontmatter: |
-  tags: template
-  hooks.snippet:
-    slashCommand: "|^|"
----

website/Library/Core/Page/Meta Index.md

@@ -1,7 +0,0 @@
-#meta
-
-This page lists all `#meta` tagged pages currently available in your space. You can also navigate to them via the {[Navigate: Meta Picker]}.
-
-```query
-page where tags = "meta" render [[Library/Core/Query/Page]]
-```

website/Library/Core/Quick Notes.md

@@ -1,8 +0,0 @@
-This is your {[Quick Note]} inbox.
-    
-```query
-page
-  where name =~ /^Inbox\//
-  render [[Library/Core/Query/Full Page]]
-  order by lastModified desc
-```

website/Library/Core/Snippet/hr.md

@@ -1,9 +0,0 @@
----
-tags: template
-description: Insert a horizontal rule
-hooks.snippet:
-  slashCommand: hr
-  exceptContexts:
-  - FencedCode
----
----

website/Library/Core/Snippet/note-admonition.md

@@ -1,7 +0,0 @@
----
-tags: template
-description: Insert a "note" admonition
-hooks.snippet.slashCommand: note-admonition
----
-> **note** Note
-> |^|

website/Library/Core/Snippet/table.md

@@ -1,11 +0,0 @@
----
-tags: template
-description: Insert a table
-hooks.snippet:
-  slashCommand: table
-  exceptContexts:
-  - FencedCode
----
-| Header A | Header B |
-|----------|----------|
-| Cell A|^| | Cell B |

website/Library/Core/Snippet/today.md

@@ -1,6 +0,0 @@
----
-tags: template
-description: "Today's date"
-hooks.snippet.slashCommand: today
----
-{{today}}

website/Library/Core/Snippet/tomorrow.md

@@ -1,6 +0,0 @@
----
-tags: template
-description: "Tomorrow's date"
-hooks.snippet.slashCommand: tomorrow
----
-{{tomorrow}}

website/Library/Core/Snippet/warning-admonition.md

@@ -1,7 +0,0 @@
----
-description: Insert a "warning" admonition
-tags: template
-hooks.snippet.slashCommand: warning-admonition
----
-> **warning** Warning
-> |^|

website/Library/Core/Snippet/yesterday.md

@@ -1,6 +0,0 @@
----
-tags: template
-description: "Yesterday's date"
-hooks.snippet.slashCommand: yesterday
----
-{{yesterday}}

website/Library/Core/Widget/Linked Tasks.md

@@ -1,16 +0,0 @@
----
-tags: template
-description: |
-  Shows all tasks that contain a link the current page. For instance a task that references `[[John]]` in its name, would appear on the `John` page.
-hooks.top:
-  where: 'true'
-  order: 1
----
-{{#let @linkedTasks = {task where not done and (contains(name, "[[" + @page.name + "]]") or contains(name, "[[" + @page.name + "|"))}}}
-{{#if @linkedTasks}}
-# Linked Tasks
-{{#each @linkedTasks}}
-{{template([[Library/Core/Query/Task]], .)}}
-{{/each}}
-{{/if}}
-{{/let}}

website/Library/Core/Widget/Tagged Tasks.md

@@ -1,9 +0,0 @@
----
-tags: template
-description: Queries all tasks tagged with a specific tag.
-usage: Pass in the tag to filter on as the `value` of this template
----
-
-```query
-task where tags = "{{.}}" and not done render [[Library/Core/Query/Task]] 
-```