From 61c63e6df3cc5bbd22fdbf3036481ade88112ca4 Mon Sep 17 00:00:00 2001
From: Christian Heller <c.heller@plomlompom.de>
Date: Mon, 26 Oct 2020 23:50:59 +0100
Subject: [PATCH] Add scrolling to monochrome client.

---
 new2/rogue_chat_nocanvas_monochrome.html | 28 ++++++++++++++++--------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/new2/rogue_chat_nocanvas_monochrome.html b/new2/rogue_chat_nocanvas_monochrome.html
index 0ca95ed..97c0f08 100644
--- a/new2/rogue_chat_nocanvas_monochrome.html
+++ b/new2/rogue_chat_nocanvas_monochrome.html
@@ -27,7 +27,6 @@ let terminal = {
         }
         line.push(' ');
     }
-      console.log(this.content);
   },
   refresh: function() {
       let pre_string = '';
@@ -38,7 +37,7 @@ let terminal = {
       this.pre_el.textContent = pre_string;
   },
   write: function(start_y, start_x, msg) {
-      for (let x = start_x, i = 0; x < this.cols, i < msg.length; x++, i++) {
+      for (let x = start_x, i = 0; x < this.cols && i < msg.length; x++, i++) {
           this.content[start_y][x] = msg[i];
       }
   },
@@ -109,22 +108,33 @@ let tui = {
     }
   },
   draw_map: function() {
+    terminal.drawBox(0, 0, terminal.rows, terminal.cols / 2);
     let map_lines = [];
-    let line = '';
+    let line = [];
     for (let i = 0, j = 0; i < game.map.length; i++, j++) {
         if (j == game.map_size[1]) {
             map_lines.push(line);
-            line = '';
+            line = [];
             j = 0;
         };
-        line += game.map[i];
+        line.push(game.map[i]);
     };
     map_lines.push(line);
-    for (let y = 0; y < game.map_size[0]; y++) {
-        terminal.write(y, 0, map_lines[y]);
+    let player_position = [0,0];
+    for (const thing_id in game.things) {
+        let t = game.things[thing_id];
+        map_lines[t[0]][t[1]] = '@';
+        player_position = t;
     }
-    for (const t in game.things) {
-      terminal.write(game.things[t][0], game.things[t][1], '@');
+    let offset = [(terminal.rows / 2) - player_position[0],
+                  terminal.cols / 4 - player_position[1]];
+      for (let term_y = offset[0], map_y = 0;
+           term_y < terminal.rows && map_y < game.map_size[0];
+           term_y++, map_y++) {
+        if (term_y >= 0) {
+            let to_draw = map_lines[map_y].join('').slice(0, terminal.cols / 2 - offset[1]);
+            terminal.write(term_y, offset[1], to_draw);
+        }
     }
   },
   draw_turn_line: function(n) {
-- 
2.30.2