X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=new2%2Frogue_chat_nocanvas_monochrome.html;h=bb1ecdaeedb13de65bb93ff2b2bf9dd950bf40f9;hb=77f28624afa28d4ab929b8865e1dfc2e441b7747;hp=fc5e24c2a397e2f1dc9bdd16201313930eed7698;hpb=3d0f035d4a276fd53b767e2be8b481a678a7360b;p=plomrogue2-experiments

diff --git a/new2/rogue_chat_nocanvas_monochrome.html b/new2/rogue_chat_nocanvas_monochrome.html
index fc5e24c..bb1ecda 100644
--- a/new2/rogue_chat_nocanvas_monochrome.html
+++ b/new2/rogue_chat_nocanvas_monochrome.html
@@ -10,18 +10,28 @@ movement: <select id="WASD_selector" name="WASD_selector" >
 </select>
 rows: <input id="n_rows" type="number" step=2 min=10 value=24 />
 cols: <input id="n_cols" type="number" step=4 min=20 value=80 />
+command character: <select id="command_char"" >
+<option value=":" selected>:</option>
+<option value="/">/</option>
+</select>
 </div>
 <pre id="terminal" style="display: inline-block;"></pre>
+<textarea id="input" style="opacity: 0; width: 0px;"></textarea>
 <script>
 "use strict";
 let websocket_location = "ws://localhost:8000";
 
+let wasd_selector = document.getElementById("WASD_selector");
+let rows_selector = document.getElementById("n_rows");
+let cols_selector = document.getElementById("n_cols");
+let command_char_selector = document.getElementById("command_char");
+
 let terminal = {
-  rows: 24,
-  cols: 80,
   foreground: 'white',
   background: 'black',
   initialize: function() {
+    this.rows = rows_selector.value;
+    this.cols = cols_selector.value;
     this.pre_el = document.getElementById("terminal");
     this.pre_el.style.color = this.foreground;
     this.pre_el.style.backgroundColor = this.background;
@@ -76,6 +86,7 @@ let terminal = {
     }
   },
 }
+terminal.initialize();
 
 let parser = {
   tokenize: function(str) {
@@ -127,20 +138,89 @@ let parser = {
   },
 }
 
+class Thing {
+    constructor(yx) {
+        this.position = yx;
+    }
+}
+
 let server = {
     init: function(url) {
-        this.websocket = new WebSocket(url);
+        this.url = url;
+        this.websocket = new WebSocket(this.url);
         this.websocket.onopen = function(event) {
             window.setInterval(function() { server.send(['PING']) }, 30000);
             tui.log_msg("@ server connected! :)");
             tui.init_login();
         };
         this.websocket.onclose = function(event) {
-            tui.log_msg('@ server disconnected :(');
-        }
+            tui.log_msg("@ server disconnected :(");
+            tui.log_msg("@ hint: try the '" + command_char_selector.value + "reconnect' command");
+        };
+	this.websocket.onmessage = this.handle_event;
+    },
+    reconnect: function() {
+	this.reconnect_to(this.url);
+    },
+    reconnect_to: function(url) {
+        this.websocket.close();
+        this.init(url);
     },
     send: function(tokens) {
         this.websocket.send(unparser.untokenize(tokens));
+    },
+    handle_event: function(event) {
+        let tokens = parser.tokenize(event.data)[0];
+        if (tokens[0] === 'TURN') {
+            game.things = {};
+            game.portals = {};
+            game.turn = parseInt(tokens[1]);
+        } else if (tokens[0] === 'THING_POS') {
+            game.get_thing(tokens[1], true).position = parser.parse_yx(tokens[2]);
+        } else if (tokens[0] === 'THING_NAME') {
+            game.get_thing(tokens[1], true).name_ = tokens[2];
+        } else if (tokens[0] === 'MAP') {
+            game.map_size = parser.parse_yx(tokens[1]);
+            game.map = tokens[2]
+        } else if (tokens[0] === 'GAME_STATE_COMPLETE') {
+            explorer.empty_info_db();
+            if (tui.mode == mode_study) {
+                explorer.query_info();
+            }
+            let t = game.get_thing(game.player_id);
+            if (t.position in game.portals) {
+                tui.teleport_target = game.portals[t.position];
+                tui.switch_mode(mode_teleport);
+                return;
+            }
+            tui.full_refresh();
+        } else if (tokens[0] === 'CHAT') {
+             tui.log_msg('# ' + tokens[1], 1);
+        } else if (tokens[0] === 'PLAYER_ID') {
+            game.player_id = parseInt(tokens[1]);
+        } else if (tokens[0] === 'LOGIN_OK') {
+            this.send(['GET_GAMESTATE']);
+            tui.log_help();
+            tui.switch_mode(mode_play);
+        } else if (tokens[0] === 'PORTAL') {
+            let position = parser.parse_yx(tokens[1]);
+            game.portals[position] = tokens[2];
+        } else if (tokens[0] === 'ANNOTATION') {
+            let position = parser.parse_yx(tokens[1]);
+            explorer.update_info_db(position, tokens[2]);
+        } else if (tokens[0] === 'UNHANDLED_INPUT') {
+            tui.log_msg('? unknown command');
+        } else if (tokens[0] === 'PLAY_ERROR') {
+            terminal.blink_screen();
+        } else if (tokens[0] === 'ARGUMENT_ERROR') {
+            tui.log_msg('? syntax error: ' + tokens[1]);
+        } else if (tokens[0] === 'GAME_ERROR') {
+            tui.log_msg('? game error: ' + tokens[1]);
+        } else if (tokens[0] === 'PONG') {
+            console.log('PONG');
+        } else {
+            tui.log_msg('? unhandled input: ' + event.data);
+        }
     }
 }
 
@@ -149,7 +229,7 @@ let unparser = {
         let quoted = ['"'];
         for (let i = 0; i < str.length; i++) {
             let c = str[i];
-            if (c in ['"', '\\']) {
+            if (['"', '\\'].includes(c)) {
                 quoted.push('\\');
             };
             quoted.push(c);
@@ -170,10 +250,10 @@ let unparser = {
 }
 
 class Mode {
-    constructor(name, has_input_prompt=false, shows_annotations=false, is_intro=false) {
+    constructor(name, has_input_prompt=false, shows_info=false, is_intro=false) {
         this.name = name;
         this.has_input_prompt = has_input_prompt;
-        this.shows_annotations = shows_annotations;
+        this.shows_info= shows_info;
         this.is_intro = is_intro;
     }
 }
@@ -184,26 +264,39 @@ let mode_annotate = new Mode('add message to map tile', true, true);
 let mode_play = new Mode('play / move around', false, false);
 let mode_study = new Mode('check map tiles for messages', false, true);
 let mode_edit = new Mode('write ASCII char to map tile', false, false);
+let mode_teleport = new Mode('teleport away?');
+let mode_portal = new Mode('add portal to map tile', true, true);
 
 let tui = {
   mode: mode_waiting_for_server,
   log: [],
   input_prompt: '> ',
-  input: '',
   input_lines: [],
   window_width: terminal.cols / 2,
   height_turn_line: 1,
   height_mode_line: 1,
   height_input: 1,
-  key_up: 'w',
-  key_down: 's',
-  key_left: 'a',
-  key_right: 'd',
-  movement_keys_desc: 'w, a, s, d',
   init: function() {
+      this.inputEl = document.getElementById("input");
+      this.inputEl.focus();
       this.recalc_input_lines();
       this.height_header = this.height_turn_line + this.height_mode_line;
       this.log_msg("@ waiting for server connection ...");
+      this.init_wasd();
+  },
+  init_wasd: function() {
+    if (wasd_selector.value == 'w, a, s, d') {
+        tui.key_up = 'w';
+        tui.key_down = 's';
+        tui.key_left = 'a';
+        tui.key_right = 'd';
+    } else if (wasd_selector.value == 'arrow keys') {
+        tui.key_up = 'ArrowUp';
+        tui.key_down = 'ArrowDown';
+        tui.key_left = 'ArrowLeft';
+        tui.key_right = 'ArrowRight';
+    };
+    tui.movement_keys_desc = wasd_selector.value;
   },
   init_login: function() {
       this.log_msg("@ please enter your username:");
@@ -211,65 +304,58 @@ let tui = {
   },
   switch_mode: function(mode, keep_pos=false) {
     if (mode == mode_study && !keep_pos) {
-      explorer.position = game.things[game.player_id];
+      explorer.position = game.things[game.player_id].position;
     }
     this.mode = mode;
     this.empty_input();
     if (mode == mode_annotate && explorer.position in explorer.info_db) {
         let info = explorer.info_db[explorer.position];
         if (info != "(none)") {
-            this.add_to_input(explorer.info_db[explorer.position]);
+	    this.inputEl.value = info;
+	    this.recalc_input_lines();
         }
     }
+    if (mode == mode_portal && explorer.position in game.portals) {
+        let portal = game.portals[explorer.position]
+	this.inputEl.value = portal;
+	this.recalc_input_lines();
+    } else if (mode == mode_teleport) {
+        tui.log_msg("@ May teleport to: " + tui.teleport_target);
+        tui.log_msg("@ Type Y or y to affirm, other keys to abort.");
+    }
     this.full_refresh();
   },
   empty_input: function(str) {
-      this.input = "";
+      this.inputEl.value = "";
       if (this.mode.has_input_prompt) {
           this.recalc_input_lines();
       } else {
           this.height_input = 0;
       }
   },
-  add_to_input: function(str) {
-      if (this.input_prompt.length + this.input.length + str.length > this.window_width * terminal.rows) {
-          return;
-      }
-      this.input += str;
-      this.recalc_input_lines();
-      this.full_refresh();
-  },
   recalc_input_lines: function() {
-      this.input_lines = this.msg_into_lines_of_width(this.input_prompt + this.input, this.window_width);
+      this.input_lines = this.msg_into_lines_of_width(this.input_prompt + this.inputEl.value, this.window_width);
       this.height_input = this.input_lines.length;
   },
-  shorten_input: function() {
-      if (this.input.length == 0) {
-          terminal.blink_screen();
-      } else {
-          this.input = tui.input.slice(0, -1);
-          this.recalc_input_lines();
-          this.full_refresh();
-      }
-  },
   msg_into_lines_of_width: function(msg, width) {
     let chunk = "";
     let lines = [];
     for (let i = 0, x = 0; i < msg.length; i++, x++) {
-      if (x >= width) {
+      if (x >= width || msg[i] == "\n") {
         lines.push(chunk);
         chunk = "";
         x = 0;
       };
-      chunk += msg[i];
+      if (msg[i] != "\n") {
+        chunk += msg[i];
+      }
     }
     lines.push(chunk);
     return lines;
   },
   log_msg: function(msg) {
-      let lines = this.msg_into_lines_of_width(msg, this.window_width);
-      this.log = this.log.concat(lines);
-      while (this.log.length > terminal.rows) {
+      this.log.push(msg);
+      while (this.log.length > 100) {
         this.log.shift();
       };
       this.full_refresh();
@@ -277,11 +363,11 @@ let tui = {
   log_help: function() {
     this.log_msg("HELP:");
     this.log_msg("chat mode commands:");
-    this.log_msg("  :nick NAME - re-name yourself to NAME");
-    this.log_msg("  :msg USER TEXT - send TEXT to USER");
-    this.log_msg("  :help - show this help");
-    this.log_msg("  :p or :play - switch to play mode");
-    this.log_msg("  :? or :study - switch to study mode");
+    this.log_msg("  " + command_char_selector.value + "nick NAME - re-name yourself to NAME");
+    this.log_msg("  " + command_char_selector.value + "msg USER TEXT - send TEXT to USER");
+    this.log_msg("  " + command_char_selector.value + "help - show this help");
+    this.log_msg("  " + command_char_selector.value + "p or " + command_char_selector.value + "play - switch to play mode");
+    this.log_msg("  " + command_char_selector.value + "? or " + command_char_selector.value + "study - switch to study mode");
     this.log_msg("commands common to study and play mode:");
     this.log_msg("  " + this.movement_keys_desc + " - move");
     this.log_msg("  c - switch to chat mode");
@@ -305,17 +391,16 @@ let tui = {
         line.push(game.map[i]);
     };
     map_lines.push(line);
-    let player_position = [0,0];
     let center_pos = [Math.floor(game.map_size[0] / 2),
 		      Math.floor(game.map_size[1] / 2)];
     for (const thing_id in game.things) {
         let t = game.things[thing_id];
-        map_lines[t[0]][t[1]] = '@';
+        map_lines[t.position[0]][t.position[1]] = '@';
         if (game.player_id == thing_id) {
-            center_pos = t;
+            center_pos = t.position;
         }
     };
-    if (tui.mode.shows_annotations) {
+    if (tui.mode.shows_info) {
         map_lines[explorer.position[0]][explorer.position[1]] = '?';
         center_pos = explorer.position;
     }
@@ -337,14 +422,15 @@ let tui = {
     terminal.write(1, this.window_width, 'TURN: ' + game.turn);
   },
   draw_history: function() {
-    if (terminal.rows <= this.height_header + this.height_input) {
-        return;
-    }
+      let log_display_lines = [];
+      for (let line of this.log) {
+          log_display_lines = log_display_lines.concat(this.msg_into_lines_of_width(line, this.window_width));
+      };
       for (let y = terminal.rows - 1 - this.height_input,
-               i = this.log.length - 1;
+               i = log_display_lines.length - 1;
            y >= this.height_header && i >= 0;
            y--, i--) {
-          terminal.write(y, this.window_width, this.log[i]);
+          terminal.write(y, this.window_width, log_display_lines[i]);
       }
   },
   draw_info: function() {
@@ -355,7 +441,7 @@ let tui = {
   },
   draw_input: function() {
     if (this.mode.has_input_prompt) {
-        for (let y = terminal.rows - this.height_input, i = 0; y < terminal.rows && i < this.input_lines.length; y++, i++) {
+        for (let y = terminal.rows - this.height_input, i = 0; i < this.input_lines.length; y++, i++) {
             terminal.write(y, this.window_width, this.input_lines[i]);
         }
     }
@@ -369,7 +455,7 @@ let tui = {
         this.draw_map();
         this.draw_turn_line();
         this.draw_mode_line();
-        if (this.mode.shows_annotations) {
+        if (this.mode.shows_info) {
           this.draw_info();
         } else {
           this.draw_history();
@@ -381,62 +467,29 @@ let tui = {
 }
 
 let game = {
-  things: {},
-  turn: 0,
-  map: "",
-  map_size: [0,0],
-  player_id: 0
+    init: function() {
+        this.things = {};
+        this.turn = -1;
+        this.map = "";
+        this.map_size = [0,0];
+        this.player_id = -1;
+        this.portals = {};
+    },
+    get_thing: function(id_, create_if_not_found=false) {
+        if (id_ in game.things) {
+            return game.things[id_];
+        } else if (create_if_not_found) {
+            let t = new Thing([0,0]);
+            game.things[id_] = t;
+            return t;
+        };
+    }
 }
 
-terminal.initialize();
+game.init();
 tui.init();
 tui.full_refresh();
-
 server.init(websocket_location);
-server.websocket.onmessage = function (event) {
-  let tokens = parser.tokenize(event.data)[0];
-  if (tokens[0] === 'TURN') {
-    game.things = {}
-    game.turn = parseInt(tokens[1]);
-  } else if (tokens[0] === 'THING_POS') {
-    game.things[tokens[1]] = parser.parse_yx(tokens[2]);
-  } else if (tokens[0] === 'MAP') {
-    game.map_size = parser.parse_yx(tokens[1]);
-    game.map = tokens[2]
-  } else if (tokens[0] === 'GAME_STATE_COMPLETE') {
-    explorer.empty_info_db();
-    if (tui.mode == mode_study) {
-      explorer.query_info();
-    }
-    tui.full_refresh();
-  } else if (tokens[0] === 'CHAT') {
-     tui.log_msg('# ' + tokens[1], 1);
-  } else if (tokens[0] === 'PLAYER_ID') {
-      game.player_id = parseInt(tokens[1]);
-  } else if (tokens[0] === 'META') {
-     tui.log_msg('@ ' + tokens[1]);
-  } else if (tokens[0] === 'LOGIN_OK') {
-      server.send(['GET_GAMESTATE']);
-      tui.log_msg('@ ' + tokens[1]);
-      tui.log_help();
-      tui.switch_mode(mode_chat);
-  } else if (tokens[0] === 'ANNOTATION') {
-     let position = parser.parse_yx(tokens[1]);
-     explorer.update_info_db(position, tokens[2]);
-  } else if (tokens[0] === 'UNHANDLED_INPUT') {
-     tui.log_msg('? unknown command');
-  } else if (tokens[0] === 'PLAY_ERROR') {
-     terminal.blink_screen();
-  } else if (tokens[0] === 'ARGUMENT_ERROR') {
-     tui.log_msg('? syntax error: ' + tokens[1]);
-  } else if (tokens[0] === 'GAME_ERROR') {
-     tui.log_msg('? game error: ' + tokens[1]);
-  } else if (tokens[0] === 'PONG') {
-    console.log('PONG');
-  } else {
-     tui.log_msg('? unhandled input: ' + event.data);
-  }
-}
 
 let explorer = {
     position: [0,0],
@@ -479,67 +532,122 @@ let explorer = {
         server.send(["GET_ANNOTATION", unparser.to_yx(explorer.position)]);
     },
     get_info: function() {
+        let info = "";
+        let position_i = this.position[0] * game.map_size[1] + this.position[1];
+        info += "TERRAIN: " + game.map[position_i] + "\n";
+        for (let t_id in game.things) {
+             let t = game.things[t_id];
+             if (t.position[0] == this.position[0] && t.position[1] == this.position[1]) {
+                 info += "PLAYER @";
+                 if (t.name_) {
+                     info += ": " + t.name_;
+                 }
+                 info += "\n";
+             }
+        }
+        if (this.position in game.portals) {
+            info += "PORTAL: " + game.portals[this.position] + "\n";
+        }
         if (this.position in this.info_db) {
-            return this.info_db[this.position];
+            info += "ANNOTATIONS: " + this.info_db[this.position];
         } else {
-            return 'waiting …';
+            info += 'waiting …';
         }
+        return info;
     },
     annotate: function(msg) {
         if (msg.length == 0) {
             msg = " ";  // triggers annotation deletion
         }
         server.send(["ANNOTATE", unparser.to_yx(explorer.position), msg]);
+    },
+    set_portal: function(msg) {
+        if (msg.length == 0) {
+            msg = " ";  // triggers portal deletion
+        }
+        server.send(["PORTAL", unparser.to_yx(explorer.position), msg]);
     }
 }
 
-document.addEventListener('keydown', (event) => {
-    if (tui.mode.has_input_prompt && event.key.length === 1) {
-        tui.add_to_input(event.key);
-    } else if (tui.mode.has_input_prompt && event.key == 'Backspace') {
-        tui.shorten_input();
-    } else if (tui.mode == mode_login && event.key == 'Enter') {
-        server.send(['LOGIN', tui.input]);
+tui.inputEl.addEventListener('input', (event) => {
+    if (tui.mode.has_input_prompt) {
+        let max_length = tui.window_width * terminal.rows - tui.input_prompt.length;
+        if (tui.inputEl.value.length > max_length) {
+            tui.inputEl.value = tui.inputEl.value.slice(0, max_length);
+        };
+        tui.recalc_input_lines();
+        tui.full_refresh();
+    } else if (tui.mode == mode_edit && tui.inputEl.value.length > 0) {
+        server.send(["TASK:WRITE", tui.inputEl.value[0]]);
+        tui.switch_mode(mode_play);
+    } else if (tui.mode == mode_teleport) {
+        if (['Y', 'y'].includes(tui.inputEl.value[0])) {
+            server.reconnect_to(tui.teleport_target);
+	} else {
+            tui.log_msg("@ teleportation aborted");
+            tui.switch_mode(mode_play);
+	}
+    }
+}, false);
+tui.inputEl.addEventListener('keydown', (event) => {
+    if (event.key == 'Enter') {
+	event.preventDefault();
+    }
+    if (tui.mode == mode_login && event.key == 'Enter') {
+        server.send(['LOGIN', tui.inputEl.value]);
         tui.switch_mode(mode_login);
+    } else if (tui.mode == mode_portal && event.key == 'Enter') {
+        explorer.set_portal(tui.inputEl.value);
+        tui.switch_mode(mode_study, true);
     } else if (tui.mode == mode_annotate && event.key == 'Enter') {
-        explorer.annotate(tui.input);
+        explorer.annotate(tui.inputEl.value);
         tui.switch_mode(mode_study, true);
     } else if (tui.mode == mode_chat && event.key == 'Enter') {
-        let [tokens, token_starts] = parser.tokenize(tui.input);
+        let [tokens, token_starts] = parser.tokenize(tui.inputEl.value);
         if (tokens.length > 0 && tokens[0].length > 0) {
-            if (tokens[0][0] == ':') {
-                if (tokens[0] == ':play' || tokens[0] == ':p') {
+            if (tui.inputEl.value[0][0] == command_char_selector.value) {
+                if (tokens[0].slice(1) == 'play' || tokens[0].slice(1) == 'p') {
                     tui.switch_mode(mode_play);
-                } else if (tokens[0] == ':study' || tokens[0] == ':?') {
+                } else if (tokens[0].slice(1) == 'study' || tokens[0].slice(1) == '?') {
                     tui.switch_mode(mode_study);
-                } else if (tokens[0] == ':help') {
+                } else if (tokens[0].slice(1) == 'help') {
                     tui.log_help();
-                } else if (tokens[0] == ':nick') {
+                } else if (tokens[0].slice(1) == 'nick') {
                     if (tokens.length > 1) {
                         server.send(['LOGIN', tokens[1]]);
                     } else {
                         tui.log_msg('? need login name');
                     }
-                } else if (tokens[0] == ':msg') {
+                } else if (tokens[0].slice(1) == 'msg') {
                     if (tokens.length > 2) {
-                        let msg = tui.input.slice(token_starts[2]);
+                        let msg = tui.inputEl.value.slice(token_starts[2]);
                         server.send(['QUERY', tokens[1], msg]);
                     } else {
                         tui.log_msg('? need message target and message');
                     }
+                } else if (tokens[0].slice(1) == 'reconnect') {
+		    if (tokens.length > 1) {
+                        server.reconnect_to(tokens[1]);
+		    } else {
+                        server.reconnect();
+		    }
                 } else {
                     tui.log_msg('? unknown command');
                 }
-            } else {
-                server.send(['ALL', tui.input]);
+	    } else {
+	        server.send(['ALL', tui.inputEl.value]);
             }
+	} else if (tui.inputEl.valuelength > 0) {
+	    server.send(['ALL', tui.inputEl.value]);
         }
         tui.empty_input();
         tui.full_refresh();
       } else if (tui.mode == mode_play) {
           if (event.key === 'c') {
+              event.preventDefault();
               tui.switch_mode(mode_chat);
           } else if (event.key === 'e') {
+              event.preventDefault();
               tui.switch_mode(mode_edit);
           } else if (event.key === '?') {
               tui.switch_mode(mode_study);
@@ -556,16 +664,15 @@ document.addEventListener('keydown', (event) => {
           } else if (event.key === tui.key_down) {
               server.send(['TASK:MOVE', 'DOWN']);
           };
-    } else if (tui.mode == mode_edit) {
-        if (event.key != "Shift" && event.key.length == 1) {
-            server.send(["TASK:WRITE", event.key]);
-            tui.switch_mode(mode_play);
-        }
     } else if (tui.mode == mode_study) {
         if (event.key === 'c') {
+            event.preventDefault();
             tui.switch_mode(mode_chat);
         } else if (event.key == 'p') {
             tui.switch_mode(mode_play);
+        } else if (event.key === 'P') {
+            event.preventDefault();
+            tui.switch_mode(mode_portal);
         } else if (event.key === tui.key_left) {
 	      explorer.move('left');
         } else if (event.key === tui.key_right) {
@@ -575,38 +682,34 @@ document.addEventListener('keydown', (event) => {
         } else if (event.key === tui.key_down) {
 	      explorer.move('down');
         } else if (event.key === 'e') {
+          event.preventDefault();
           tui.switch_mode(mode_annotate);
         };
     }
 }, false);
 
-let wasd_selector = document.getElementById("WASD_selector");
 wasd_selector.addEventListener('input', function() {
-    if (wasd_selector.value == 'w, a, s, d') {
-        tui.key_up = 'w';
-        tui.key_down = 's';
-        tui.key_left = 'a';
-        tui.key_right = 'd';
-    } else if (wasd_selector.value == 'arrow keys') {
-        tui.key_up = 'ArrowUp';
-        tui.key_down = 'ArrowDown';
-        tui.key_left = 'ArrowLeft';
-        tui.key_right = 'ArrowRight';
-    };
-    tui.movement_keys_desc = wasd_selector.value;
+    tui.init_wasd();
 }, false);
-let rows_selector = document.getElementById("n_rows");
 rows_selector.addEventListener('input', function() {
-    terminal.rows = rows_selector.value;
+    if (rows_selector.value % 2 != 0) {
+        return;
+    }
     terminal.initialize();
     tui.full_refresh();
 }, false);
-let cols_selector = document.getElementById("n_cols");
 cols_selector.addEventListener('input', function() {
-    terminal.cols = cols_selector.value;
+    if (cols_selector.value % 4 != 0) {
+        return;
+    }
     terminal.initialize();
     tui.window_width = terminal.cols / 2,
     tui.full_refresh();
 }, false);
+window.setInterval(function() {
+    if (!(['input', 'n_cols', 'n_rows', 'WASD_selector', 'command_char'].includes(document.activeElement.id))) {
+        tui.inputEl.focus();
+    }
+}, 100);
 </script>
 </body></html>