diff --git a/src/lua/View.zig b/src/lua/View.zig
index ffea58e..4f4c394 100644
--- a/src/lua/View.zig
+++ b/src/lua/View.zig
@@ -6,6 +6,10 @@ const LuaUtils = @import("LuaUtils.zig");
 
 const server = &@import("../main.zig").server;
 
+fn view_id_err(L: *zlua.Lua) noreturn {
+  L.raiseErrorStr("The view id must be >= 0 and < inf", .{});
+}
+
 // ---@alias view_id integer
 
 // ---Get the ids for all available views
@@ -49,7 +53,7 @@ pub fn get_focused_id(L: *zlua.Lua) i32 {
 // ---Close the view with view_id
 // ---@param view_id view_id 0 maps to focused view
 pub fn close(L: *zlua.Lua) i32 {
-  const view_id: u64 = @intCast(L.checkInteger(1));
+  const view_id = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
 
   const view: ?*View = if (view_id == 0) server.seat.focused_view else server.root.viewById(view_id);
   if(view) |v| {
@@ -67,9 +71,9 @@ pub fn close(L: *zlua.Lua) i32 {
 pub fn set_position(L: *zlua.Lua) i32 {
   std.log.debug("repositioning", .{});
 
-  const view_id: u64 = @intCast(L.checkInteger(1));
-  const x: i32 = @intFromFloat(@round(L.checkNumber(2)));
-  const y: i32 = @intFromFloat(@round(L.checkNumber(3)));
+  const view_id = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
+  const x = LuaUtils.coerceNumber(i32, L.checkNumber(2)) catch L.raiseErrorStr("The x must be > -inf and < inf", .{});
+  const y = LuaUtils.coerceNumber(i32, L.checkNumber(3)) catch L.raiseErrorStr("The y must be > -inf and < inf", .{});
 
   std.log.debug("position to set: ({d}, {d})", .{x, y});
 
@@ -87,13 +91,17 @@ pub fn set_position(L: *zlua.Lua) i32 {
 // ---@param width number width for view
 // ---@param height number height for view
 pub fn set_size(L: *zlua.Lua) i32 {
-  const view_id: u64 = @intCast(L.checkInteger(1));
-  const width = LuaUtils.coerceNumber(i32, L.checkNumber(2)) catch L.raiseErrorStr("The width must be >= 0 and < inf", .{});
-  const height = LuaUtils.coerceNumber(i32, L.checkNumber(3)) catch L.raiseErrorStr("The height must be >= 0 and < inf", .{});
+  const view_id = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
+  // We use u32s here to enforce a minimum size of zero. The call to resize a
+  // toplevel requires a i32, which doesn't make too much sense as there's an
+  // assertion in the code enforcing that both the width and height are greater
+  // than or equal to zero.
+  const width = LuaUtils.coerceNumber(u32, L.checkNumber(2)) catch L.raiseErrorStr("The width must be >= 0 and < inf", .{});
+  const height = LuaUtils.coerceNumber(u32, L.checkNumber(3)) catch L.raiseErrorStr("The height must be >= 0 and < inf", .{});
 
   const view: ?*View = if (view_id == 0) server.seat.focused_view else server.root.viewById(view_id);
   if(view) |v| {
-    v.setSize(width, height);
+    v.setSize(@intCast(width), @intCast(height));
   }
 
   L.pushNil();
@@ -101,7 +109,7 @@ pub fn set_size(L: *zlua.Lua) i32 {
 }
 
 pub fn get_size(L: *zlua.Lua) i32 {
-  const view_id: u64 = @intCast(L.checkInteger(1));
+  const view_id = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
   const view: ?*View = if (view_id == 0) server.seat.focused_view else server.root.viewById(view_id);
   if (view) |v| {
     L.newTable();
@@ -154,7 +162,7 @@ pub fn set_focused(L: *zlua.Lua) i32 {
 // ---@param view_id view_id 0 maps to focused view
 // ---@return string?
 pub fn get_title(L: *zlua.Lua) i32 {
-  const view_id: u64 = @intCast(L.checkInteger(1));
+  const view_id: u64 = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
 
   const view: ?*View = if (view_id == 0) server.seat.focused_view else server.root.viewById(view_id);
   if(view) |v| {
@@ -175,7 +183,7 @@ pub fn get_title(L: *zlua.Lua) i32 {
 // ---@param view_id view_id 0 maps to focused view
 // ---@return string?
 pub fn get_app_id(L: *zlua.Lua) i32 {
-  const view_id: u64 = @intCast(L.checkInteger(1));
+  const view_id = LuaUtils.coerceInteger(u64, L.checkInteger(1)) catch view_id_err(L);
 
   const view: ?*View = if (view_id == 0) server.seat.focused_view else server.root.viewById(view_id);
   if(view) |v| {