From a91876b6a50ba516d2d9b2691d488b718a58e424 Mon Sep 17 00:00:00 2001
From: MeexReay <meexreay@gmail.com>
Date: Fri, 21 Mar 2025 20:01:52 +0300
Subject: [PATCH] kfc display improvement

---
 app/kfc/kfc.js | 69 ++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 61 insertions(+), 8 deletions(-)

diff --git a/app/kfc/kfc.js b/app/kfc/kfc.js
index 615d93c..7f347a3 100644
--- a/app/kfc/kfc.js
+++ b/app/kfc/kfc.js
@@ -17,19 +17,32 @@ async function cropToScreen(text, x, y, width, height) {
     return screen.join("\n")
 }
 
+async function printScreen(start_cursor, pos, content, mode, pos, x, y, width, height) {
+    trimTerminal(getTerminal().length - screen_length)
+    let screen = await cropToScreen(content, 0, 0, width, height - 1)
+    await writeStdout(screen)
+    let status_line = `\nmode: ${mode} | size: ${content.length} | lines: ${content.split("\n").length} | x: ${pos[0]} | y: ${pos[1]}`
+    await writeStdout(status_line)
+    setCursor(start_cursor[0] + pos[0], start_cursor[1] + pos[1])
+    return [screen.length + status_line.length, status_line.length - 1]
+}
+
 async function main(args) {
     if (args.length != 2) {
         writeStdout(`Usage: kfc <file>\n`)
         return 1
     }
 
-    let [terminal_width, terminal_height] = getTerminalSize()
 
     let content = readFile(args[1])
 
-    let pos = getCursor()
+    let mode = "normal"
+    let pos = [0, 0]
+
+    let start_cursor = getCursor()
+    let [width, height] = getTerminalSize()
+    let [screen_length, status_length] = await printScreen(0, start_cursor, pos, content, mode, pos, 0, 0, width, height)
 
-    await writeStdout(await cropToScreen(content, 0, 0, terminal_width, terminal_height - 1))
 
     setStdinFlag(ENABLE_STDIN)
     setStdinFlag(SILENT_STDIN)
@@ -40,14 +53,54 @@ async function main(args) {
         console.log(event)
 
         if (event.type == "key") {
-            if (event.key == "Escape") {
-                break
-            }
+            if (event.key == "Backspace") {
 
-            writeStdout(JSON.stringify(event) + "\n")
+            } else if (event.key == "Delete") {
+                
+            } else if (event.key == "ArrowUp") {
+                pos[1] = Math.max(0, pos[1] - 1)
+            } else if (event.key == "ArrowDown") {
+                pos[1] = Math.min(height - 2, pos[1] + 1)
+            } else if (event.key == "ArrowLeft") {
+                pos[0] = Math.max(0, pos[0] - 1)
+            } else if (event.key == "ArrowRight") {
+                pos[0] = Math.min(height - 1, pos[0] + 1)
+            } else if (event.key == "Escape") {
+                mode = "normal"
+            } else if (event.key == "Insert") {
+                mode = "insert"
+            }
         } else if (event.type == "char") {
-            writeStdout(JSON.stringify(event) + "\n")
+            if (mode == "normal") {
+                if (event.char == ":") {
+                    trimTerminal(getTerminal().length - status_length)
+                    writeStdout(":")
+    
+                    let command = readLine()
+    
+                    setStdinFlag(ENABLE_STDIN)
+                    setStdinFlag(SILENT_STDIN)
+    
+                    if (command == "w") {
+                        // save
+                    } else if (command == "q") {
+                        break
+                    } else if (command == "x") {
+                        // save
+    
+                        break
+                    }
+                } else if (event.char == "i") {
+                    mode = "insert"
+                }
+            } else if (mode == "insert") {
+                
+            }
         }
+
+        let res = await printScreen(screen_length, start_cursor, pos, content, mode, pos, 0, 0, width, height)
+        screen_length = res[0]
+        status_length = res[1]
     }
 
     setStdinFlag(RENDER_STDIN)