window center method

Author: obfuscatedgenerated

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ollieos",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "",
   "private": true,
   "main": "server.js",

package.json

@@ -0,0 +1,40 @@
+import {ANSI} from "../../term_ctl";
+import { ProgramMainData } from "../../types"
+
+// extract from ANSI to make code less verbose
+const { STYLE, FG, PREFABS } = ANSI;
+export const center_subcommand = async (data: ProgramMainData) => {
+    // extract from data to make code less verbose
+    const { args, term } = data;
+
+    // remove subcommand name
+    args.shift();
+
+    // get the window id to center
+    if (args.length === 0) {
+        term.writeln(`${PREFABS.error}Missing window ID.`)
+        term.writeln(`Try 'window -h' for more information.${STYLE.reset_all}`);
+        return 1;
+    }
+
+    const window_id = parseInt(args[0], 10);
+    if (isNaN(window_id)) {
+        term.writeln(`${PREFABS.error}Invalid window ID '${args[0]}'. Window ID must be an integer.`)
+        term.writeln(`Try 'window list' to see all open windows.${STYLE.reset_all}`);
+        return 1;
+    }
+
+    const wm = term.get_window_manager();
+    const wind = wm!.get_window_by_id(window_id);
+
+    if (!wind) {
+        term.writeln(`${PREFABS.error}No window found with ID '${window_id}'.`)
+        term.writeln(`Try 'window list' to see all open windows.${STYLE.reset_all}`);
+        return 1;
+    }
+
+    term.writeln(`Centering window with ID ${FG.cyan}${window_id}${STYLE.reset_all}.`);
+    wind.center();
+
+    return 0;
+}

src/programs/window/center.ts

@@ -6,6 +6,7 @@ import {list_subcommand} from "./list";
 import {show_subcommand} from "./show";
 import {hide_subcommand} from "./hide";
 import {close_subcommand} from "./close";
+import {center_subcommand} from "./center";
 
 // extract from ANSI to make code less verbose
 const {STYLE, PREFABS} = ANSI;
@@ -23,15 +24,16 @@ export default {
             "show": `Shows a window by its ID: ${PREFABS.program_name}window${STYLE.reset_all + STYLE.italic} show <window_id>${STYLE.reset_all}`,
             "hide": `Hides a window by its ID: ${PREFABS.program_name}window${STYLE.reset_all + STYLE.italic} hide <window_id>${STYLE.reset_all}`,
             "close": `Closes a window by its ID: ${PREFABS.program_name}window${STYLE.reset_all + STYLE.italic} close <window_id>${STYLE.reset_all}. Note that this does not terminate the process that opened the window.`,
+            "center": `Centers a window by its ID: ${PREFABS.program_name}window${STYLE.reset_all + STYLE.italic} show <window_id>${STYLE.reset_all}`,
         },
         "Arguments:": {
             "-h": "Displays this help message.",
             "For list:": {
                 "-v": "List only visible windows.",
                 "-i": "List only invisible (minimised/hidden) windows.",
             },
-            "For show, hide, and close:": {
-                "<window_id>": "The ID of the window to show, hide, or close.",
+            "For show, hide, close, and center:": {
+                "<window_id>": "The ID of the window.",
             }
         }
     },
@@ -66,6 +68,8 @@ export default {
                 return await hide_subcommand(data);
             case "close":
                 return await close_subcommand(data);
+            case "center":
+                return await center_subcommand(data);
             default:
                 term.writeln(`${PREFABS.error}Invalid subcommand.`);
                 term.writeln(`Try 'window -h' for more information.${STYLE.reset_all}`);

src/programs/window/index.ts

@@ -323,6 +323,11 @@ export class DOMWindowManager extends AbstractWindowManager {
                 this._window_root.style.top = css_pos;
             }
 
+            center() {
+                this.x = `calc(calc(100vw - ${this.width}) / 2)`;
+                this.y = `calc(calc(100vh - ${this.height}) / 2)`;
+            }
+
             get dom() {
                 return this._shadow_dom;
             }

src/window_impl/dom.ts

@@ -32,6 +32,8 @@ export abstract class AbstractWindow {
     abstract get y(): string | number;
     abstract set y(css_pos: string | number);
 
+    abstract center(): void;
+
     abstract get visible(): boolean;
     abstract set visible(is_visible: boolean);