terminal/new: page resizebuf boilerplate

src/terminal/new/page.zig

@@ -206,6 +206,35 @@ pub const Page = struct {
         return result;
     }
 
+    /// Clone and resize this page to the new layout with a provided
+    /// memory buffer. The new layout can change any parameters. If they
+    /// do not fit within the new layout, OutOfMemory is returned.
+    /// If OutOfMemory is returned, the memory buffer is not zeroed;
+    /// the caller should zero if it is reused.
+    ///
+    /// If reflow is true, soft-wrapped text will be reflowed. If reflow
+    /// is false then soft-wrapped text will be truncated.
+    ///
+    /// For deleted cells, this will reclaim the grapheme/style memory
+    /// as appropriate. A page has no concept of the current active style
+    /// so if you want the current active style to not be GCd then you
+    /// should increase the ref count before calling this function, and
+    /// decrease it after.
+    pub fn resizeBuf(
+        self: *Page,
+        buf: OffsetBuf,
+        l: Layout,
+        reflow: bool,
+    ) !Page {
+        // TODO
+        if (reflow) @panic("TODO");
+
+        // Non-reflow resize is relatively simple.
+        _ = self;
+        _ = buf;
+        _ = l;
+    }
+
     /// Get a single row. y must be valid.
     pub fn getRow(self: *const Page, y: usize) *Row {
         assert(y < self.size.rows);