Move commands to a separate file

src/command.zig

@@ -0,0 +1,78 @@
+const std = @import("std");
+const c = @import("c.zig");
+
+const Server = @import("server.zig").Server;
+const ViewStack = @import("view_stack.zig").ViewStack;
+
+/// Exit the compositor, terminating the wayland session.
+pub fn exitCompositor(server: *Server) void {
+    c.wl_display_terminate(server.wl_display);
+}
+
+/// Shift focus to the next visible view, wrapping if needed.
+pub fn focusNextView(server: *Server) void {
+    server.root.focusNextView();
+}
+
+/// Shift focus to the previous visible view, wrapping if needed.
+pub fn focusPrevView(server: *Server) void {
+    server.root.focusPrevView();
+}
+
+/// Modify the number of master views
+pub fn modifyMasterCount(server: *Server, delta: i32) void {
+    server.root.master_count = @intCast(u32, std.math.max(
+        0,
+        @intCast(i32, server.root.master_count) + delta,
+    ));
+    server.root.arrange();
+}
+
+/// Modify the percent of the width of the screen that the master views occupy.
+pub fn modifyMasterFactor(server: *Server, delta: f64) void {
+    const new_master_factor = std.math.min(
+        std.math.max(server.root.master_factor + delta, 0.05),
+        0.95,
+    );
+    if (new_master_factor != server.root.master_factor) {
+        server.root.master_factor = new_master_factor;
+        server.root.arrange();
+    }
+}
+
+/// Bump the focused view to the top of the stack.
+/// TODO: if the top of the stack is focused, bump the next visible view.
+pub fn zoom(server: *Server) void {
+    if (server.root.focused_view) |current_focus| {
+        const node = @fieldParentPtr(ViewStack.Node, "view", current_focus);
+        if (node != server.root.views.first) {
+            server.root.views.remove(node);
+            server.root.views.push(node);
+            server.root.arrange();
+        }
+    }
+}
+
+/// Switch focus to the passed tags.
+pub fn focusTags(server: *Server, tags: u32) void {
+    server.root.pending_focused_tags = tags;
+    server.root.arrange();
+}
+
+/// Set the tags of the focused view.
+pub fn setFocusedViewTags(server: *Server, tags: u32) void {
+    if (server.root.focused_view) |view| {
+        if (view.current_tags != tags) {
+            view.pending_tags = tags;
+            server.root.arrange();
+        }
+    }
+}
+
+/// Spawn a program.
+/// TODO: make this take a program as a paramter and spawn that
+pub fn spawn(server: *Server) void {
+    const argv = [_][]const u8{ "/bin/sh", "-c", "alacritty" };
+    const child = std.ChildProcess.init(&argv, std.heap.c_allocator) catch unreachable;
+    std.ChildProcess.spawn(child) catch unreachable;
+}