line edit support for home, del and end keys

src/chat.c

@@ -280,16 +280,25 @@ static void chat_onKey(ToxWindow *self, Tox *m, wint_t key)
     getyx(self->window, y, x);
     getmaxyx(self->window, y2, x2);
 
-    /* BACKSPACE key: Remove one character from line */
+    if (key == 0x107 || key == 0x8 || key == 0x7f) {  /* BACKSPACE key: Remove character behind pos */
-    if (key == 0x107 || key == 0x8 || key == 0x7f) {
         if (ctx->pos > 0) {
-            del_char_from_buf(key, ctx->line, &ctx->pos, &ctx->len);
+            del_char_buf_bck(ctx->line, &ctx->pos, &ctx->len);
 
             if (x == 0)
                 wmove(self->window, y-1, x2-1);
             else
                 wmove(self->window, y, x-1);
         }
+    } else if (key == KEY_DC) {      /* DEL key: Remove character at pos */
+        del_char_buf_frnt(ctx->line, &ctx->pos, &ctx->len);
+    } else if (key == KEY_HOME) {    /* HOME key: Move cursor to beginning of line */
+        ctx->pos = 0;
+        wmove(self->window, y2 - CURS_Y_OFFSET, 0);
+    } else if (key == KEY_END) {     /* END key: move cursor to end of line */
+        ctx->pos = ctx->len;
+        int end_y = (ctx->pos / x2) + y;
+        int end_x = ctx->len % x2;
+        wmove(self->window, end_y, end_x);
     } else if (key == KEY_LEFT && ctx->pos > 0) {
         --ctx->pos;
 
@@ -305,7 +314,6 @@ static void chat_onKey(ToxWindow *self, Tox *m, wint_t key)
         else
             wmove(self->window, y, x+1);
     } else
-    /* Add printable chars to buffer and print on input space */
 #if HAVE_WIDECHAR
     if (iswprint(key))
 #else

src/groupchat.c

@@ -220,16 +220,25 @@ static void groupchat_onKey(ToxWindow *self, Tox *m, wint_t key)
     getyx(self->window, y, x);
     getmaxyx(self->window, y2, x2);
 
-    /* BACKSPACE key: Remove one character from line */
+    if (key == 0x107 || key == 0x8 || key == 0x7f) {  /* BACKSPACE key: Remove character behind pos */
-    if (key == 0x107 || key == 0x8 || key == 0x7f) {
         if (ctx->pos > 0) {
-            del_char_from_buf(key, ctx->line, &ctx->pos, &ctx->len);
+            del_char_buf_bck(ctx->line, &ctx->pos, &ctx->len);
 
             if (x == 0)
                 wmove(self->window, y-1, x2-1);
             else
                 wmove(self->window, y, x-1);
         }
+    } else if (key == KEY_DC) {      /* DEL key: Remove character at pos */
+        del_char_buf_frnt(ctx->line, &ctx->pos, &ctx->len);
+    } else if (key == KEY_HOME) {    /* HOME key: Move cursor to beginning of line */
+        ctx->pos = 0;
+        wmove(self->window, y2 - CURS_Y_OFFSET, 0);
+    } else if (key == KEY_END) {     /* END key: move cursor to end of line */
+        ctx->pos = ctx->len;
+        int end_y = (ctx->pos / x2) + y;
+        int end_x = ctx->len % x2;
+        wmove(self->window, end_y, end_x);
     } else if (key == KEY_LEFT && ctx->pos > 0) {
         --ctx->pos;
 

src/misc_tools.c

@@ -188,8 +188,8 @@ void add_char_to_buf(wint_t ch, wchar_t *buf, size_t *pos, size_t *len)
     ++(*len);
 }
 
-/* Deletes the character before pos via the backspace key */
+/* Deletes the character before pos */
-void del_char_from_buf(wint_t ch, wchar_t *buf, size_t *pos, size_t *len)
+void del_char_buf_bck(wchar_t *buf, size_t *pos, size_t *len)
 {
     if (*pos <= 0)
         return;
@@ -211,7 +211,21 @@ void del_char_from_buf(wint_t ch, wchar_t *buf, size_t *pos, size_t *len)
     --(*len);
 }
 
-/* sets pos and len to 0 */
+/* Deletes the character at pos */
+void del_char_buf_frnt(wchar_t *buf, size_t *pos, size_t *len)
+{
+    if (*pos < 0 || *pos >= *len)
+        return;
+
+    int i;
+
+    for (i = *pos; i < *len; ++i)
+        buf[i] = buf[i+1];
+
+    --(*len);
+}
+
+/* nulls buf and sets pos and len to 0 */
 void reset_buf(wchar_t *buf, size_t *pos, size_t *len)
 {
     buf[0] = L'\0';

src/misc_tools.h

@@ -44,8 +44,11 @@ bool valid_nick(uint8_t *nick);
 /* Adds char to buffer at pos */
 void add_char_to_buf(wint_t ch, wchar_t *buf, size_t *pos, size_t *len);
 
-/* Deletes the character before pos via the backspace key */
+/* Deletes the character before pos */
-void del_char_from_buf(wint_t ch, wchar_t *buf, size_t *pos, size_t *len);
+void del_char_buf_bck(wchar_t *buf, size_t *pos, size_t *len);
 
-/* sets pos and len to 0 */
+/* Deletes the character at pos */
+void del_char_buf_frnt(wchar_t *buf, size_t *pos, size_t *len);
+
+/* nulls buf and sets pos and len to 0 */
 void reset_buf(wchar_t *buf, size_t *pos, size_t *len);