Hook up new window, modify renderers

src/App.zig

@@ -10,6 +10,7 @@ const Window = @import("Window.zig");
 const tracy = @import("tracy");
 const Config = @import("config.zig").Config;
 const BlockingQueue = @import("./blocking_queue.zig").BlockingQueue;
+const renderer = @import("renderer.zig");
 
 const log = std.log.scoped(.app);
 
@@ -34,34 +35,33 @@ mailbox: *Mailbox,
 /// Initialize the main app instance. This creates the main window, sets
 /// up the renderer state, compiles the shaders, etc. This is the primary
 /// "startup" logic.
-pub fn init(alloc: Allocator, config: *const Config) !App {
+pub fn create(alloc: Allocator, config: *const Config) !*App {
     // The mailbox for messaging this thread
     var mailbox = try Mailbox.create(alloc);
     errdefer mailbox.destroy(alloc);
 
-    // Create the first window
-    var window = try Window.create(alloc, config);
-    errdefer window.destroy();
-
-    // Create our windows list and add our initial window.
-    var windows: WindowList = .{};
-    errdefer windows.deinit(alloc);
-    try windows.append(alloc, window);
-
-    return App{
+    var app = try alloc.create(App);
+    errdefer alloc.destroy(app);
+    app.* = .{
         .alloc = alloc,
-        .windows = windows,
+        .windows = .{},
         .config = config,
         .mailbox = mailbox,
     };
+    errdefer app.windows.deinit(alloc);
+
+    // Create the first window
+    try app.newWindow();
+
+    return app;
 }
 
-pub fn deinit(self: *App) void {
+pub fn destroy(self: *App) void {
     // Clean up all our windows
     for (self.windows.items) |window| window.destroy();
     self.windows.deinit(self.alloc);
     self.mailbox.destroy(self.alloc);
-    self.* = undefined;
+    self.alloc.destroy(self);
 }
 
 /// Wake up the app event loop. This should be called after any messages
@@ -86,6 +86,11 @@ pub fn run(self: *App) !void {
         while (i < self.windows.items.len) {
             const window = self.windows.items[i];
             if (window.shouldClose()) {
+                // If this was our final window, deinitialize the renderer
+                if (self.windows.items.len == 1) {
+                    renderer.Renderer.lastWindowDeinit();
+                }
+
                 window.destroy();
                 _ = self.windows.swapRemove(i);
                 continue;
@@ -107,11 +112,24 @@ fn drainMailbox(self: *App) !void {
     while (drain.next()) |message| {
         log.debug("mailbox message={}", .{message});
         switch (message) {
-            .new_window => unreachable,
+            .new_window => try self.newWindow(),
         }
     }
 }
 
+/// Create a new window
+fn newWindow(self: *App) !void {
+    var window = try Window.create(self.alloc, self, self.config);
+    errdefer window.destroy();
+    try self.windows.append(self.alloc, window);
+    errdefer _ = self.windows.pop();
+
+    // This was the first window, so we need to initialize our renderer.
+    if (self.windows.items.len == 1) {
+        try window.renderer.firstWindowInit(window.window);
+    }
+}
+
 /// The message types that can be sent to the app thread.
 pub const Message = union(enum) {
     /// Create a new terminal window.

src/Window.zig

@@ -22,6 +22,7 @@ const terminal = @import("terminal/main.zig");
 const Config = @import("config.zig").Config;
 const input = @import("input.zig");
 const DevMode = @import("DevMode.zig");
+const App = @import("App.zig");
 
 // Get native API access on certain platforms so we can do more customization.
 const glfwNative = glfw.Native(.{
@@ -36,6 +37,9 @@ const Renderer = renderer.Renderer;
 /// Allocator
 alloc: Allocator,
 
+/// The app that this window is a part of.
+app: *App,
+
 /// The font structures
 font_lib: font.Library,
 font_group: *font.GroupCache,
@@ -107,7 +111,7 @@ const Mouse = struct {
 /// Create a new window. This allocates and returns a pointer because we
 /// need a stable pointer for user data callbacks. Therefore, a stack-only
 /// initialization is not currently possible.
-pub fn create(alloc: Allocator, config: *const Config) !*Window {
+pub fn create(alloc: Allocator, app: *App, config: *const Config) !*Window {
     var self = try alloc.create(Window);
     errdefer alloc.destroy(self);
 
@@ -313,6 +317,7 @@ pub fn create(alloc: Allocator, config: *const Config) !*Window {
 
     self.* = .{
         .alloc = alloc,
+        .app = app,
         .font_lib = font_lib,
         .font_group = font_group,
         .window = window,
@@ -386,7 +391,7 @@ pub fn create(alloc: Allocator, config: *const Config) !*Window {
 
     // Give the renderer one more opportunity to finalize any window
     // setup on the main thread prior to spinning up the rendering thread.
-    try renderer_impl.finalizeInit(window);
+    try renderer_impl.finalizeWindowInit(window);
 
     // Start our renderer thread
     self.renderer_thr = try std.Thread.spawn(
@@ -752,6 +757,13 @@ fn keyCallback(
                     DevMode.instance.visible = !DevMode.instance.visible;
                     win.queueRender() catch unreachable;
                 } else log.warn("dev mode was not compiled into this binary", .{}),
+
+                .new_window => {
+                    _ = win.app.mailbox.push(.{
+                        .new_window = {},
+                    }, .{ .forever = {} });
+                    win.app.wakeup();
+                },
             }
 
             // Bindings always result in us ignoring the char if printable

src/config.zig

@@ -157,6 +157,12 @@ pub const Config = struct {
             .{ .toggle_dev_mode = {} },
         );
 
+        try result.keybind.set.put(
+            alloc,
+            .{ .key = .up, .mods = .{ .super = true } },
+            .{ .new_window = {} },
+        );
+
         return result;
     }
 

src/input/Binding.zig

@@ -133,6 +133,9 @@ pub const Action = union(enum) {
 
     /// Dev mode
     toggle_dev_mode: void,
+
+    /// Open a new terminal window.
+    new_window: void,
 };
 
 /// Trigger is the associated key state that can trigger an action.

src/main.zig

@@ -128,8 +128,8 @@ pub fn main() !void {
     defer glfw.terminate();
 
     // Run our app
-    var app = try App.init(alloc, &config);
-    defer app.deinit();
+    var app = try App.create(alloc, &config);
+    defer app.destroy();
     try app.run();
 }
 

src/renderer/Metal.zig

@@ -240,11 +240,6 @@ pub fn init(alloc: Allocator, font_group: *font.GroupCache) !Metal {
 }
 
 pub fn deinit(self: *Metal) void {
-    if (DevMode.enabled) {
-        imgui.ImplMetal.shutdown();
-        imgui.ImplGlfw.shutdown();
-    }
-
     self.cells.deinit(self.alloc);
 
     self.font_shaper.deinit();
@@ -255,7 +250,7 @@ pub fn deinit(self: *Metal) void {
 
 /// This is called just prior to spinning up the renderer thread for
 /// final main thread setup requirements.
-pub fn finalizeInit(self: *const Metal, window: glfw.Window) !void {
+pub fn finalizeWindowInit(self: *const Metal, window: glfw.Window) !void {
     // Set our window backing layer to be our swapchain
     const nswindow = objc.Object.fromId(glfwNative.getCocoaWindow(window).?);
     const contentView = objc.Object.fromId(nswindow.getProperty(?*anyopaque, "contentView").?);
@@ -268,7 +263,12 @@ pub fn finalizeInit(self: *const Metal, window: glfw.Window) !void {
     const layer = contentView.getProperty(objc.Object, "layer");
     const scaleFactor = nswindow.getProperty(macos.graphics.c.CGFloat, "backingScaleFactor");
     layer.setProperty("contentsScale", scaleFactor);
+}
 
+/// This is called only after the first window is opened. This may be
+/// called multiple times if all windows are closed and a new one is
+/// reopened.
+pub fn firstWindowInit(self: *const Metal, window: glfw.Window) !void {
     if (DevMode.enabled) {
         // Initialize for our window
         assert(imgui.ImplGlfw.initForOther(
@@ -279,6 +279,14 @@ pub fn finalizeInit(self: *const Metal, window: glfw.Window) !void {
     }
 }
 
+/// This is called only when the last window is destroyed.
+pub fn lastWindowDeinit() void {
+    if (DevMode.enabled) {
+        imgui.ImplMetal.shutdown();
+        imgui.ImplGlfw.shutdown();
+    }
+}
+
 /// Callback called by renderer.Thread when it begins.
 pub fn threadEnter(self: *const Metal, window: glfw.Window) !void {
     _ = self;

src/renderer/OpenGL.zig

@@ -300,11 +300,6 @@ pub fn init(alloc: Allocator, font_group: *font.GroupCache) !OpenGL {
 }
 
 pub fn deinit(self: *OpenGL) void {
-    if (DevMode.enabled) {
-        imgui.ImplOpenGL3.shutdown();
-        imgui.ImplGlfw.shutdown();
-    }
-
     self.font_shaper.deinit();
     self.alloc.free(self.font_shaper.cell_buf);
 
@@ -387,7 +382,17 @@ pub fn windowInit(window: glfw.Window) !void {
 
 /// This is called just prior to spinning up the renderer thread for
 /// final main thread setup requirements.
-pub fn finalizeInit(self: *const OpenGL, window: glfw.Window) !void {
+pub fn finalizeWindowInit(self: *const OpenGL, window: glfw.Window) !void {
+    _ = self;
+    _ = window;
+}
+
+/// This is called only after the first window is opened. This may be
+/// called multiple times if all windows are closed and a new one is
+/// reopened.
+pub fn firstWindowInit(self: *const OpenGL, window: glfw.Window) !void {
+    _ = self;
+
     if (DevMode.enabled) {
         // Initialize for our window
         assert(imgui.ImplGlfw.initForOpenGL(
@@ -396,9 +401,14 @@ pub fn finalizeInit(self: *const OpenGL, window: glfw.Window) !void {
         ));
         assert(imgui.ImplOpenGL3.init("#version 330 core"));
     }
+}
 
-    // Call thread exit to clean up our context
-    self.threadExit();
+/// This is called only when the last window is destroyed.
+pub fn lastWindowDeinit() void {
+    if (DevMode.enabled) {
+        imgui.ImplOpenGL3.shutdown();
+        imgui.ImplGlfw.shutdown();
+    }
 }
 
 /// Callback called by renderer.Thread when it begins.