From 62bbc522055a5c5a680b55846922ae9418dae83b Mon Sep 17 00:00:00 2001
From: antifallobst <antifallobst@systemausfall.org>
Date: Thu, 4 May 2023 11:30:28 +0200
Subject: [PATCH] feature (renderer): implemented cursor moving ascii extension

---
 src/drivers/graphics/renderer.c | 60 ++++++++++++++++++++++++++++-----
 src/drivers/ps2/keyboard.c      |  3 ++
 2 files changed, 54 insertions(+), 9 deletions(-)

diff --git a/src/drivers/graphics/renderer.c b/src/drivers/graphics/renderer.c
index e335aaf..1297304 100644
--- a/src/drivers/graphics/renderer.c
+++ b/src/drivers/graphics/renderer.c
@@ -99,15 +99,6 @@ position_T graphics_buffer_draw_string(graphics_buffer_T* graphics_buffer, uint3
     position_T pos = (position_T){x, y};
     uint64_t strlen = string_length(string);
     for (int i = 0; i < strlen; i++) {
-        if (pos.x + g_renderer.font.width >= graphics_buffer->width) {
-            pos.x = 0;
-            pos.y += g_renderer.font.height;
-        }
-        if (pos.y + g_renderer.font.height >= graphics_buffer->height) {
-            pos.y -= g_renderer.font.height;
-            graphics_buffer_shift_up(graphics_buffer, g_renderer.font.height);
-        }
-
         switch (string[i]) {
             case '\n': {
                 pos.x = 0;
@@ -129,8 +120,59 @@ position_T graphics_buffer_draw_string(graphics_buffer_T* graphics_buffer, uint3
                 graphics_buffer_draw_char(graphics_buffer, pos.x, pos.y, color, ' ');
                 break;
             }
+            case 0x0F: {
+                string_ext_header_T* header = (string_ext_header_T*)&string[i];
+                switch (header->command) {
+                    case STRING_EXT_CMD_CURSOR_MOVE: {
+                        switch (header->data) {
+                            case 0: {
+                                if (pos.x >= g_renderer.font.width) {
+                                    pos.x -= g_renderer.font.width;
+                                } else if (pos.y >= g_renderer.font.height) {
+                                    pos.y -= g_renderer.font.height;
+                                    pos.x  = FLOOR_TO(graphics_buffer->width, g_renderer.font.width) - g_renderer.font.width;
+                                }
+                                break;
+                            }
+                            case 1: {
+                                if (pos.x < FLOOR_TO(graphics_buffer->width, g_renderer.font.width) - g_renderer.font.width) {
+                                    pos.x += g_renderer.font.width;
+                                } else if (pos.y < FLOOR_TO(graphics_buffer->height, g_renderer.font.height) - g_renderer.font.height) {
+                                    pos.y += g_renderer.font.height;
+                                    pos.x  = 0;
+                                }
+                                break;
+                            }
+                            case 2: {
+                                if (pos.y >= g_renderer.font.height) {
+                                    pos.y -= g_renderer.font.height;
+                                }
+                                break;
+                            }
+                            case 3: {
+                                if (pos.y < FLOOR_TO(graphics_buffer->height, g_renderer.font.height) - g_renderer.font.height) {
+                                    pos.y += g_renderer.font.height;
+                                }
+                                break;
+                            }
+                        }
+                        break;
+                    }
+                }
+                i += STRING_EXT_SIZE(header->length);
+                break;
+            }
 
             default: {
+                if (pos.x + g_renderer.font.width >= graphics_buffer->width) {
+                    pos.x = 0;
+                    pos.y += g_renderer.font.height;
+                }
+                if (pos.y + g_renderer.font.height >= graphics_buffer->height) {
+                    pos.y -= g_renderer.font.height;
+                    graphics_buffer_shift_up(graphics_buffer, g_renderer.font.height);
+                }
+
                 graphics_buffer_draw_char(graphics_buffer, pos.x, pos.y, color, string[i]);
                 pos.x += g_renderer.font.width;
                 break;
diff --git a/src/drivers/ps2/keyboard.c b/src/drivers/ps2/keyboard.c
index 00cf96e..16c17ce 100644
--- a/src/drivers/ps2/keyboard.c
+++ b/src/drivers/ps2/keyboard.c
@@ -97,6 +97,9 @@ void ps2_keyboard_read() {
                 return;
             }
         }
+
+        tty_write(chr);
+        return;
     }
 
     if (scancode == PS2_SCANCODE_SET_1_MODIFIER) {