From 46ff9f2e0178ecf7ce473d88a00ae63c4a7851c5 Mon Sep 17 00:00:00 2001
From: Johnny Richard <johnny@johnnyrichard.com>
Date: Tue, 26 Apr 2022 03:33:03 +0200
Subject: Implement home and end keys movement

---
 ted.c | 37 ++++++++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/ted.c b/ted.c
index 4568719..739a1a5 100644
--- a/ted.c
+++ b/ted.c
@@ -36,6 +36,8 @@ enum editor_key {
   ARROW_RIGHT,
   ARROW_UP,
   ARROW_DOWN,
+  HOME_KEY,
+  END_KEY,
   PAGE_UP,
   PAGE_DOWN
 };
@@ -94,31 +96,26 @@ editor_read_key()
   int nread;
   char c;
   while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
-    if (nread == -1 && errno != EAGAIN) {
-      die("read");
-    }
+    if (nread == -1 && errno != EAGAIN) die("read");
   }
 
   if (c == '\x1b') {
     char seq[3];
 
-    if (read(STDIN_FILENO, &seq[0], 1) != 1) {
-      return '\x1b';
-    }
-
-    if (read(STDIN_FILENO, &seq[1], 1) != 1) {
-      return '\x1b';
-    }
+    if (read(STDIN_FILENO, &seq[0], 1) != 1) return '\x1b';
+    if (read(STDIN_FILENO, &seq[1], 1) != 1) return '\x1b';
 
     if (seq[0] == '[') {
       if (seq[1] >= '0' && seq[1] <= '9') {
-        if (read(STDIN_FILENO, &seq[2], 1) != 1) {
-          return '\x1b';
-        }
+        if (read(STDIN_FILENO, &seq[2], 1) != 1) return '\x1b';
         if (seq[2] == '~') {
           switch (seq[1]) {
+            case '1': return HOME_KEY;
+            case '4': return END_KEY;
             case '5': return PAGE_UP;
             case '6': return PAGE_DOWN;
+            case '7': return HOME_KEY;
+            case '8': return END_KEY;
           }
         }
       } else {
@@ -127,9 +124,17 @@ editor_read_key()
           case 'B': return ARROW_DOWN;
           case 'C': return ARROW_RIGHT;
           case 'D': return ARROW_LEFT;
+          case 'H': return HOME_KEY;
+          case 'F': return END_KEY;
         }
       }
+    } else if (seq[0] == 'O') {
+      switch (seq[1]) {
+        case 'H': return HOME_KEY;
+        case 'F': return END_KEY;
+      }
     }
+
     return '\x1b';
   } else {
     return c;
@@ -221,6 +226,12 @@ editor_process_key(editor_config_t *ec)
       editor_clear_screen();
       exit(EXIT_SUCCESS);
       break;
+    case HOME_KEY:
+      ec->cx = 0;
+      break;
+    case END_KEY:
+      ec->cx = ec->screen_cols - 1;
+      break;
     case PAGE_UP:
     case PAGE_DOWN:
       {
-- 
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