json сохранение

src/WindowContext.zig

@@ -27,6 +27,17 @@ pub const OpenDocument = struct {
         self.selected_object_id = null;
     }
 
+    pub fn initWithDocument(allocator: std.mem.Allocator, self: *OpenDocument, doc: Document) void {
+        self.document = doc;
+        self.cpu_render = CpuRenderEngine.init(allocator, .Squares);
+        self.canvas = Canvas.init(
+            allocator,
+            &self.document,
+            (&self.cpu_render).renderEngine(),
+        );
+        self.selected_object_id = null;
+    }
+
     pub fn deinit(self: *OpenDocument) void {
         self.document.deinit();
         self.canvas.deinit();
@@ -73,6 +84,16 @@ pub fn addNewDocument(self: *WindowContext) !void {
     self.active_document_index = self.documents.items.len - 1;
 }
 
+pub fn addDocument(self: *WindowContext, doc: Document) !void {
+    const ptr = try self.allocator.create(OpenDocument);
+    errdefer self.allocator.destroy(ptr);
+    var doc_mut = doc;
+    errdefer doc_mut.deinit();
+    OpenDocument.initWithDocument(self.allocator, ptr, doc_mut);
+    try self.documents.append(self.allocator, ptr);
+    self.active_document_index = self.documents.items.len - 1;
+}
+
 pub fn setActiveDocument(self: *WindowContext, index: usize) void {
     if (index < self.documents.items.len) {
         self.active_document_index = index;