Adjusting Maze Size to Fit the Window

In the previous section, we outputted the maze to a buffer. However, the maze size can sometimes be too large or too small for the window. It would be better to have a maze that fits the current window size.

Let's modify the plugin to ensure the generated maze fits the current window size.

import type { Entrypoint } from "https://deno.land/x/denops_std@v6.5.0/mod.ts";
import * as fn from "https://deno.land/x/denops_std@v6.5.0/function/mod.ts";
import { Maze } from "https://deno.land/x/maze_generator@v0.4.0/mod.js";

export const main: Entrypoint = (denops) => {
  denops.dispatcher = {
    async maze() {
      await denops.cmd("enew");

      const winWidth = await fn.winwidth(denops, 0);
      const winHeight = await fn.winheight(denops, 0);
      const maze = new Maze({
        xSize: winWidth / 3,
        ySize: winHeight / 3,
      }).generate();
      const content = maze.getString();

      await fn.setline(denops, 1, content.split(/\r?\n/g));
    },
  };
};

In this code, we utilize the function module (aliased to fn) of denops_std (Denops Standard Library) to call winwidth(), winheight(), and setline() functions. Then, we create a maze that fits the current window size and write it to the buffer.

So why do we use the function module instead of denops.call? With denops.call, developers must know the function name, arguments, return type, and manually cast the return value to the expected type (like as string). However, with the function module, developers can use auto-completion, type checking, etc. It is more convenient and safe to use the function module.

Restart Vim, rerun the :Maze command, and then you can see: