core: Implement commands for operating on a single input line

This changes the commands delete_beginning_of_line, delete_end_of_line,
delete_line, move_beginning_of_line and move_end_of_line to operate on
the current line instead of the whole input. The commands
delete_beginning_of_input, delete_end_of_input, delete_input,
move_beginning_of_input and move_end_of_input are added with the
previous implementations that the line commands had.

Additionally, the commands move_previous_line and move_next_line are
added which moves the cursor to the previous/next line and keeps the
horizontal position in the line.

The meta-r key is changed from delete_line to delete_input to keep the
behavior, and because you probably want to delete the whole input more
often than the line. The meta-R key is added for delete_line.

The home, end, ctrl-u and ctrl-k keys are kept to the same commands,
which means that they change behaviour. This is because having them
operate on the line is consistent with other applications (vim, zsh),
and I also think it's more practical.

These new bindings are added:

    shift-home:  /input move_beginning_of_input
    shift-end:   /input move_end_of_input
    shift-up:    /input move_previous_line
    shift-down:  /input move_next_line
    meta-R:      /input delete_line
    meta-ctrl-u: /input delete_beginning_of_input
    meta-ctrl-k: /input delete_end_of_input

Relates to #1498

src/core/wee-command.c

@@ -3481,16 +3481,26 @@ COMMAND_CALLBACK(input)
         gui_input_delete_next_word (buffer);
     else if (string_strcmp (argv[1], "delete_beginning_of_line") == 0)
         gui_input_delete_beginning_of_line (buffer);
+    else if (string_strcmp (argv[1], "delete_beginning_of_input") == 0)
+        gui_input_delete_beginning_of_input (buffer);
     else if (string_strcmp (argv[1], "delete_end_of_line") == 0)
         gui_input_delete_end_of_line (buffer);
+    else if (string_strcmp (argv[1], "delete_end_of_input") == 0)
+        gui_input_delete_end_of_input (buffer);
     else if (string_strcmp (argv[1], "delete_line") == 0)
         gui_input_delete_line (buffer);
+    else if (string_strcmp (argv[1], "delete_input") == 0)
+        gui_input_delete_input (buffer);
     else if (string_strcmp (argv[1], "transpose_chars") == 0)
         gui_input_transpose_chars (buffer);
     else if (string_strcmp (argv[1], "move_beginning_of_line") == 0)
         gui_input_move_beginning_of_line (buffer);
+    else if (string_strcmp (argv[1], "move_beginning_of_input") == 0)
+        gui_input_move_beginning_of_input (buffer);
     else if (string_strcmp (argv[1], "move_end_of_line") == 0)
         gui_input_move_end_of_line (buffer);
+    else if (string_strcmp (argv[1], "move_end_of_input") == 0)
+        gui_input_move_end_of_input (buffer);
     else if (string_strcmp (argv[1], "move_previous_char") == 0)
         gui_input_move_previous_char (buffer);
     else if (string_strcmp (argv[1], "move_next_char") == 0)
@@ -3499,6 +3509,10 @@ COMMAND_CALLBACK(input)
         gui_input_move_previous_word (buffer);
     else if (string_strcmp (argv[1], "move_next_word") == 0)
         gui_input_move_next_word (buffer);
+    else if (string_strcmp (argv[1], "move_previous_line") == 0)
+        gui_input_move_previous_line (buffer);
+    else if (string_strcmp (argv[1], "move_next_line") == 0)
+        gui_input_move_next_line (buffer);
     else if (string_strcmp (argv[1], "history_previous") == 0)
         gui_input_history_local_previous (buffer);
     else if (string_strcmp (argv[1], "history_next") == 0)
@@ -8352,18 +8366,26 @@ command_init ()
            "  delete_next_word: delete next word\n"
            "  delete_beginning_of_line: delete from beginning of line until "
            "cursor\n"
+           "  delete_beginning_of_input: delete from beginning of input until "
            "  delete_end_of_line: delete from cursor until end of line\n"
+           "cursor\n"
+           "  delete_end_of_input: delete from cursor until end of input\n"
            "  delete_line: delete entire line\n"
+           "  delete_input: delete entire input\n"
            "  clipboard_paste: paste from the internal clipboard\n"
            "  transpose_chars: transpose two chars\n"
            "  undo: undo last command line action\n"
            "  redo: redo last command line action\n"
            "  move_beginning_of_line: move cursor to beginning of line\n"
+           "  move_beginning_of_input: move cursor to beginning of input\n"
            "  move_end_of_line: move cursor to end of line\n"
+           "  move_end_of_input: move cursor to end of input\n"
            "  move_previous_char: move cursor to previous char\n"
            "  move_next_char: move cursor to next char\n"
            "  move_previous_word: move cursor to previous word\n"
            "  move_next_word: move cursor to next word\n"
+           "  move_previous_line: move cursor to previous line\n"
+           "  move_next_line: move cursor to next line\n"
            "  history_previous: recall previous command in current buffer "
            "history\n"
            "  history_next: recall next command in current buffer history\n"
@@ -8387,12 +8409,16 @@ command_init ()
         "search_stop_here || search_stop || "
         "delete_previous_char || delete_next_char || delete_previous_word || "
         "delete_previous_word_whitespace || delete_next_word || "
-        "delete_beginning_of_line || delete_end_of_line || delete_line || "
+        "delete_beginning_of_line || delete_beginning_of_input || "
+        "delete_end_of_line || delete_end_of_input || "
+        "delete_line || delete_input || "
         "clipboard_paste || "
         "transpose_chars || "
         "undo || redo || "
-        "move_beginning_of_line || move_end_of_line || move_previous_char || "
-        "move_next_char || move_previous_word || move_next_word || "
+        "move_beginning_of_line || move_beginning_of_input || "
+        "move_end_of_line || move_end_of_input || "
+        "move_previous_char || move_next_char || move_previous_word || "
+        "move_next_word || move_previous_line || move_next_line || "
         "history_previous || history_next || history_global_previous || "
         "history_global_next || "
         "grab_key || grab_raw_key || grab_raw_key_command || grab_key_command || "

src/core/wee-utf8.c

@@ -270,6 +270,48 @@ utf8_next_char (const char *string)
     return string + 1;
 }
 
+/*
+ * Gets pointer to the beginning of the UTF-8 line in a string.
+ *
+ * Returns pointer to the beginning of the UTF-8 line, NULL if string was NULL.
+ */
+
+const char *
+utf8_beginning_of_line (const char *string_start, const char *string)
+{
+    if (string && string[0] == '\n')
+        string = (char *)utf8_prev_char (string_start, string);
+
+    while (string && string[0] != '\n')
+    {
+        string = (char *)utf8_prev_char (string_start, string);
+    }
+
+    if (string)
+        return (char *)utf8_next_char (string);
+
+    return string_start;
+}
+
+/*
+ * Gets pointer to the end of the UTF-8 line in a string.
+ *
+ * Returns pointer to the end of the UTF-8 line, NULL if string was NULL.
+ */
+
+const char *
+utf8_end_of_line (const char *string)
+{
+    if (!string)
+        return NULL;
+
+    while (string[0] && string[0] != '\n')
+    {
+        string = (char *)utf8_next_char (string);
+    }
+    return string;
+}
+
 /*
  * Gets UTF-8 char as an integer.
  *

src/core/wee-utf8.h

@@ -35,6 +35,9 @@ extern void utf8_normalize (char *string, char replacement);
 extern const char *utf8_prev_char (const char *string_start,
                                    const char *string);
 extern const char *utf8_next_char (const char *string);
+extern const char *utf8_beginning_of_line (const char *string_start,
+                                           const char *string);
+extern const char *utf8_end_of_line (const char *string);
 extern int utf8_char_int (const char *string);
 extern int utf8_int_string (unsigned int unicode_value, char *string);
 extern int utf8_char_size (const char *string);

src/gui/curses/gui-curses-key.c

@@ -95,14 +95,19 @@ gui_key_default_bindings (int context, int create_option)
         BIND("meta-x",            "/buffer zoom");
         BIND("meta-d",            "/input delete_next_word");
         BIND("ctrl-k",            "/input delete_end_of_line");
-        BIND("meta-r",            "/input delete_line");
+        BIND("meta-ctrl-k",       "/input delete_end_of_input");
+        BIND("meta-r",            "/input delete_input");
+        BIND("meta-R",            "/input delete_line");
         BIND("ctrl-t",            "/input transpose_chars");
         BIND("ctrl-u",            "/input delete_beginning_of_line");
+        BIND("meta-ctrl-u",       "/input delete_beginning_of_input");
         BIND("ctrl-y",            "/input clipboard_paste");
         BIND("home",              "/input move_beginning_of_line");
         BIND("ctrl-a",            "/input move_beginning_of_line");
+        BIND("shift-home",        "/input move_beginning_of_input");
         BIND("end",               "/input move_end_of_line");
         BIND("ctrl-e",            "/input move_end_of_line");
+        BIND("shift-end",         "/input move_end_of_input");
         BIND("left",              "/input move_previous_char");
         BIND("ctrl-b",            "/input move_previous_char");
         BIND("right",             "/input move_next_char");
@@ -115,6 +120,8 @@ gui_key_default_bindings (int context, int create_option)
         BIND("down",              "/input history_next");
         BIND("ctrl-up",           "/input history_global_previous");
         BIND("ctrl-down",         "/input history_global_next");
+        BIND("shift-up",          "/input move_previous_line");
+        BIND("shift-down",        "/input move_next_line");
         BIND("meta-a",            "/buffer jump smart");
         BIND("meta-j,meta-f",     "/buffer -");
         BIND("meta-j,meta-l",     "/buffer +");

src/gui/gui-input.c

@@ -915,10 +915,104 @@ gui_input_delete_next_word (struct t_gui_buffer *buffer)
 
 /*
  * Deletes all from cursor pos to beginning of line (default key: ctrl-u).
+ *
+ * If cursor is at beginning of line, deletes to beginning of previous line.
  */
 
 void
 gui_input_delete_beginning_of_line (struct t_gui_buffer *buffer)
+{
+    int length_deleted, size_deleted;
+    char *start, *beginning_of_line;
+
+    if (!buffer->input || (buffer->input_buffer_pos <= 0))
+        return;
+
+    gui_buffer_undo_snap (buffer);
+    start = (char *)utf8_add_offset (buffer->input_buffer,
+                                     buffer->input_buffer_pos);
+
+    beginning_of_line = (char *)utf8_beginning_of_line (buffer->input_buffer, start);
+    if (beginning_of_line == start)
+    {
+        beginning_of_line = (char *)utf8_prev_char (buffer->input_buffer,
+                                                    beginning_of_line);
+        beginning_of_line = (char *)utf8_beginning_of_line (buffer->input_buffer,
+                                                            beginning_of_line);
+    }
+
+    size_deleted = start - beginning_of_line;
+    length_deleted = utf8_strnlen (beginning_of_line, size_deleted);
+    gui_input_clipboard_copy (beginning_of_line, size_deleted);
+
+    memmove (beginning_of_line, start, strlen (start));
+
+    if (gui_input_optimize_size (
+            buffer,
+            buffer->input_buffer_size - size_deleted,
+            buffer->input_buffer_length - length_deleted))
+    {
+        buffer->input_buffer[buffer->input_buffer_size] = '\0';
+        buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                             beginning_of_line - buffer->input_buffer);
+    }
+    gui_input_text_changed_modifier_and_signal (buffer,
+                                                1, /* save undo */
+                                                1); /* stop completion */
+}
+
+/*
+ * Deletes all from cursor pos to end of line (default key: ctrl-k).
+ *
+ * If cursor is at end of line, deletes to end of next line.
+ */
+
+void
+gui_input_delete_end_of_line (struct t_gui_buffer *buffer)
+{
+    int length_deleted, size_deleted;
+    char *start, *end_of_line;
+
+    if (!buffer->input)
+        return;
+
+    gui_buffer_undo_snap (buffer);
+    start = (char *)utf8_add_offset (buffer->input_buffer,
+                                     buffer->input_buffer_pos);
+
+    if (start[0] && start[0] == '\n')
+        end_of_line = (char *)utf8_next_char (start);
+    else
+        end_of_line = start;
+    end_of_line = (char *)utf8_end_of_line (end_of_line);
+
+    size_deleted = end_of_line - start;
+    length_deleted = utf8_strnlen (start, size_deleted);
+    gui_input_clipboard_copy (start, size_deleted);
+
+    memmove (start, end_of_line, strlen (end_of_line));
+
+    if (gui_input_optimize_size (
+            buffer,
+            buffer->input_buffer_size - size_deleted,
+            buffer->input_buffer_length - length_deleted))
+    {
+        buffer->input_buffer[buffer->input_buffer_size] = '\0';
+        buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                             start - buffer->input_buffer);
+    }
+
+    gui_input_text_changed_modifier_and_signal (buffer,
+                                                1, /* save undo */
+                                                1); /* stop completion */
+}
+
+/*
+ * Deletes all from cursor pos to beginning of input (default key: alt-ctrl-u).
+ */
+
+void
+gui_input_delete_beginning_of_input (struct t_gui_buffer *buffer)
 {
     int length_deleted, size_deleted;
     char *start;
@@ -950,11 +1044,11 @@ gui_input_delete_beginning_of_line (struct t_gui_buffer *buffer)
 }
 
 /*
- * Deletes all from cursor pos to end of line (default key: ctrl-k).
+ * Deletes all from cursor pos to end of input (default key: alt-ctrl-k).
  */
 
 void
-gui_input_delete_end_of_line (struct t_gui_buffer *buffer)
+gui_input_delete_end_of_input (struct t_gui_buffer *buffer)
 {
     char *start;
     int size_deleted;
@@ -977,11 +1071,51 @@ gui_input_delete_end_of_line (struct t_gui_buffer *buffer)
 }
 
 /*
- * Deletes entire line (default key: alt-r).
+ * Deletes entire line (default key: alt-R).
  */
 
 void
 gui_input_delete_line (struct t_gui_buffer *buffer)
+{
+    int length_deleted, size_deleted;
+    char *start, *beginning_of_line, *end_of_line;
+
+    if (!buffer->input)
+        return;
+
+    gui_buffer_undo_snap (buffer);
+    start = (char *)utf8_add_offset (buffer->input_buffer,
+                                     buffer->input_buffer_pos);
+
+    beginning_of_line = (char *)utf8_beginning_of_line (buffer->input_buffer, start);
+    end_of_line = (char *)utf8_end_of_line (start);
+
+    size_deleted = end_of_line - beginning_of_line;
+    length_deleted = utf8_strnlen (start, size_deleted);
+
+    memmove (beginning_of_line, end_of_line, strlen (end_of_line));
+
+    if (gui_input_optimize_size (
+            buffer,
+            buffer->input_buffer_size - size_deleted,
+            buffer->input_buffer_length - length_deleted))
+    {
+        buffer->input_buffer[buffer->input_buffer_size] = '\0';
+        buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                             beginning_of_line - buffer->input_buffer);
+    }
+
+    gui_input_text_changed_modifier_and_signal (buffer,
+                                                1, /* save undo */
+                                                1); /* stop completion */
+}
+
+/*
+ * Deletes entire input (default key: alt-r).
+ */
+
+void
+gui_input_delete_input (struct t_gui_buffer *buffer)
 {
     if (!buffer->input)
         return;
@@ -1037,11 +1171,11 @@ gui_input_transpose_chars (struct t_gui_buffer *buffer)
 }
 
 /*
- * Moves cursor to beginning of line (default key: home).
+ * Moves cursor to beginning of input (default key: shift-home).
  */
 
 void
-gui_input_move_beginning_of_line (struct t_gui_buffer *buffer)
+gui_input_move_beginning_of_input (struct t_gui_buffer *buffer)
 {
     if (!buffer->input || (buffer->input_buffer_pos <= 0))
         return;
@@ -1051,11 +1185,11 @@ gui_input_move_beginning_of_line (struct t_gui_buffer *buffer)
 }
 
 /*
- * Moves cursor to end of line (default key: end).
+ * Moves cursor to end of input (default key: shift-end).
  */
 
 void
-gui_input_move_end_of_line (struct t_gui_buffer *buffer)
+gui_input_move_end_of_input (struct t_gui_buffer *buffer)
 {
     if (!buffer->input
         || (buffer->input_buffer_pos >= buffer->input_buffer_length))
@@ -1067,6 +1201,73 @@ gui_input_move_end_of_line (struct t_gui_buffer *buffer)
     gui_input_text_cursor_moved_signal (buffer);
 }
 
+/*
+ * Moves cursor to beginning of line (default key: home).
+ *
+ * If cursor is at beginning of line, moves to beginning of previous line.
+ */
+
+void
+gui_input_move_beginning_of_line (struct t_gui_buffer *buffer)
+{
+    char *pos, *original_pos;
+
+    if (!buffer->input || (buffer->input_buffer_pos <= 0))
+        return;
+
+    pos = (char *)utf8_add_offset (buffer->input_buffer,
+                                   buffer->input_buffer_pos);
+    original_pos = pos;
+    pos = (char *)utf8_beginning_of_line (buffer->input_buffer, pos);
+
+    if (pos == original_pos)
+    {
+        pos = (char *)utf8_prev_char (buffer->input_buffer, pos);
+        pos = (char *)utf8_beginning_of_line (buffer->input_buffer, pos);
+    }
+
+    buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                         pos - buffer->input_buffer);
+
+    gui_input_text_cursor_moved_signal (buffer);
+}
+
+/*
+ * Moves cursor to end of line (default key: end).
+ *
+ * If cursor is at end of line, moves to end of next line.
+ */
+
+void
+gui_input_move_end_of_line (struct t_gui_buffer *buffer)
+{
+    char *pos;
+
+    if (!buffer->input
+        || (buffer->input_buffer_pos >= buffer->input_buffer_length))
+    {
+        return;
+    }
+
+    pos = (char *)utf8_add_offset (buffer->input_buffer,
+                                   buffer->input_buffer_pos);
+    if (pos[0] && pos[0] == '\n')
+    {
+        pos = (char *)utf8_next_char (pos);
+    }
+    pos = (char *)utf8_end_of_line (pos);
+    if (pos[0])
+    {
+        buffer->input_buffer_pos =
+            utf8_pos (buffer->input_buffer,
+                      pos - buffer->input_buffer);
+    }
+    else
+        buffer->input_buffer_pos = buffer->input_buffer_length;
+
+    gui_input_text_cursor_moved_signal (buffer);
+}
+
 /*
  * Moves cursor to previous char (default key: left).
  */
@@ -1179,6 +1380,85 @@ gui_input_move_next_word (struct t_gui_buffer *buffer)
     gui_input_text_cursor_moved_signal (buffer);
 }
 
+/*
+ * Moves cursor to previous line (default key: shift-up).
+ */
+
+void
+gui_input_move_previous_line (struct t_gui_buffer *buffer)
+{
+    int beginning_of_line_pos, length_from_beginning, i;
+    char *pos;
+
+    if (!buffer->input || (buffer->input_buffer_pos <= 0))
+        return;
+
+    pos = (char *)utf8_add_offset (buffer->input_buffer,
+                                   buffer->input_buffer_pos);
+    pos = (char *)utf8_beginning_of_line (buffer->input_buffer, pos);
+
+    if (pos != buffer->input_buffer)
+    {
+        beginning_of_line_pos = utf8_pos (buffer->input_buffer,
+                                          pos - buffer->input_buffer);
+        length_from_beginning = buffer->input_buffer_pos - beginning_of_line_pos;
+
+        pos = (char *)utf8_prev_char (buffer->input_buffer, pos);
+        pos = (char *)utf8_beginning_of_line (buffer->input_buffer, pos);
+
+        for (i = 0; pos[0] && pos[0] != '\n' && i < length_from_beginning; i++)
+        {
+            pos = (char *)utf8_next_char (pos);
+        }
+
+        buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                             pos - buffer->input_buffer);
+
+        gui_input_text_cursor_moved_signal (buffer);
+    }
+}
+
+/*
+ * Moves cursor to next line (default key: shift-down).
+ */
+
+void
+gui_input_move_next_line (struct t_gui_buffer *buffer)
+{
+    int beginning_of_line_pos, length_from_beginning, i;
+    char *pos;
+
+    if (!buffer->input
+        || (buffer->input_buffer_pos >= buffer->input_buffer_length))
+    {
+        return;
+    }
+
+    pos = (char *)utf8_add_offset (buffer->input_buffer,
+                                   buffer->input_buffer_pos);
+    pos = (char *)utf8_beginning_of_line (buffer->input_buffer, pos);
+
+    beginning_of_line_pos = utf8_pos (buffer->input_buffer,
+                                      pos - buffer->input_buffer);
+    length_from_beginning = buffer->input_buffer_pos - beginning_of_line_pos;
+
+    pos = (char *)utf8_end_of_line (pos);
+    if (pos[0])
+    {
+        pos = (char *)utf8_next_char (pos);
+
+        for (i = 0; pos[0] && pos[0] != '\n' && i < length_from_beginning; i++)
+        {
+            pos = (char *)utf8_next_char (pos);
+        }
+
+        buffer->input_buffer_pos = utf8_pos (buffer->input_buffer,
+                                             pos - buffer->input_buffer);
+
+        gui_input_text_cursor_moved_signal (buffer);
+    }
+}
+
 /*
  * Recalls previous command from local or global history.
  */

src/gui/gui-input.h

@@ -58,14 +58,21 @@ extern void gui_input_delete_previous_word_whitespace (struct t_gui_buffer *buff
 extern void gui_input_delete_next_word (struct t_gui_buffer *buffer);
 extern void gui_input_delete_beginning_of_line (struct t_gui_buffer *buffer);
 extern void gui_input_delete_end_of_line (struct t_gui_buffer *buffer);
+extern void gui_input_delete_beginning_of_input (struct t_gui_buffer *buffer);
+extern void gui_input_delete_end_of_input (struct t_gui_buffer *buffer);
 extern void gui_input_delete_line (struct t_gui_buffer *buffer);
+extern void gui_input_delete_input (struct t_gui_buffer *buffer);
 extern void gui_input_transpose_chars (struct t_gui_buffer *buffer);
+extern void gui_input_move_beginning_of_input (struct t_gui_buffer *buffer);
+extern void gui_input_move_end_of_input (struct t_gui_buffer *buffer);
 extern void gui_input_move_beginning_of_line (struct t_gui_buffer *buffer);
 extern void gui_input_move_end_of_line (struct t_gui_buffer *buffer);
 extern void gui_input_move_previous_char (struct t_gui_buffer *buffer);
 extern void gui_input_move_next_char (struct t_gui_buffer *buffer);
 extern void gui_input_move_previous_word (struct t_gui_buffer *buffer);
 extern void gui_input_move_next_word (struct t_gui_buffer *buffer);
+extern void gui_input_move_previous_line (struct t_gui_buffer *buffer);
+extern void gui_input_move_next_line (struct t_gui_buffer *buffer);
 extern void gui_input_history_local_previous (struct t_gui_buffer *buffer);
 extern void gui_input_history_local_next (struct t_gui_buffer *buffer);
 extern void gui_input_history_global_previous (struct t_gui_buffer *buffer);

tests/unit/core/test-core-utf8.cpp

@@ -114,11 +114,12 @@ extern "C"
 #define UTF8_4BYTES_TRUNCATED_3  "\xf0\xa4\xad"
 
 /* "noël" */
-#define UTF8_NOEL_VALID          "no\xc3\xabl"
-#define UTF8_NOEL_INVALID        "no\xc3l"
-#define UTF8_NOEL_INVALID2       "no\xff\xffl"
-#define UTF8_NOEL_INVALID_NORM   "no?l"
-#define UTF8_NOEL_INVALID2_NORM  "no??l"
+#define UTF8_NOEL_VALID            "no\xc3\xabl"
+#define UTF8_NOEL_VALID_MULTILINE  "no\xc3\xabl\nno\xc3\xabl"
+#define UTF8_NOEL_INVALID          "no\xc3l"
+#define UTF8_NOEL_INVALID2         "no\xff\xffl"
+#define UTF8_NOEL_INVALID_NORM     "no?l"
+#define UTF8_NOEL_INVALID2_NORM    "no??l"
 
 TEST_GROUP(CoreUtf8)
 {
@@ -323,6 +324,8 @@ TEST(CoreUtf8, Normalize)
  * Tests functions:
  *   utf8_prev_char
  *   utf8_next_char
+ *   utf8_beginning_of_line
+ *   utf8_end_of_line
  *   utf8_add_offset
  *   utf8_real_pos
  *   utf8_pos
@@ -333,6 +336,7 @@ TEST(CoreUtf8, Move)
     const char *ptr;
     const char *empty_string = "";
     const char *noel_valid = UTF8_NOEL_VALID;
+    const char *noel_valid_multiline = UTF8_NOEL_VALID_MULTILINE;
     const char *utf8_2bytes_truncated_1 = UTF8_2BYTES_TRUNCATED_1;
     const char *utf8_3bytes_truncated_1 = UTF8_3BYTES_TRUNCATED_1;
     const char *utf8_3bytes_truncated_2 = UTF8_3BYTES_TRUNCATED_2;
@@ -377,6 +381,28 @@ TEST(CoreUtf8, Move)
     POINTERS_EQUAL(utf8_4bytes_truncated_3 + 3,
                    utf8_next_char (utf8_4bytes_truncated_3));
 
+    /* beginning/end of line */
+    POINTERS_EQUAL(NULL, utf8_beginning_of_line (NULL, NULL));
+    POINTERS_EQUAL(NULL, utf8_end_of_line (NULL));
+    ptr = utf8_end_of_line (noel_valid_multiline);
+    STRCMP_EQUAL("\nnoël", ptr);
+    ptr = utf8_end_of_line (ptr);
+    STRCMP_EQUAL("\nnoël", ptr);
+    ptr = utf8_next_char (ptr);
+    ptr = utf8_end_of_line (ptr);
+    STRCMP_EQUAL("", ptr);
+    ptr = utf8_end_of_line (ptr);
+    STRCMP_EQUAL("", ptr);
+    ptr = utf8_beginning_of_line (noel_valid_multiline, ptr);
+    STRCMP_EQUAL(noel_valid, ptr);
+    ptr = utf8_beginning_of_line (noel_valid_multiline, ptr);
+    STRCMP_EQUAL(noel_valid, ptr);
+    ptr = utf8_prev_char (noel_valid_multiline, ptr);
+    ptr = utf8_beginning_of_line (noel_valid_multiline, ptr);
+    STRCMP_EQUAL(noel_valid_multiline, ptr);
+    ptr = utf8_beginning_of_line (noel_valid_multiline, ptr);
+    STRCMP_EQUAL(noel_valid_multiline, ptr);
+
     /* add offset */
     POINTERS_EQUAL(NULL, utf8_add_offset (NULL, 0));
     ptr = utf8_add_offset (noel_valid, 0);