Remember the fact we completed the entire line in cursor_x, but report it as usual in other cases as the last character on the line. When writing a new character, a newline is then written so it wraps properly.
This can happen in practice when writing one character at a time to the console; right now it will keep overwriting the last character on the line.
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com --- programs/conhost/conhost.c | 30 ++++++++-------- programs/conhost/conhost.h | 5 +++ programs/conhost/tests/tty.c | 67 ++++++++++++++++++++++++++++++++++++ programs/conhost/window.c | 8 ++--- 4 files changed, 91 insertions(+), 19 deletions(-)
diff --git a/programs/conhost/conhost.c b/programs/conhost/conhost.c index fbee37d..e5ec84f 100644 --- a/programs/conhost/conhost.c +++ b/programs/conhost/conhost.c @@ -278,7 +278,7 @@ static void tty_sync( struct console *console )
if (console->active->cursor_visible) { - set_tty_cursor( console, console->active->cursor_x, console->active->cursor_y ); + set_tty_cursor( console, get_bounded_cursor_x(console->active), console->active->cursor_y ); if (!console->tty_cursor_visible) { tty_write( console, "\x1b[?25h", 6 ); /* show cursor */ @@ -307,11 +307,12 @@ static void scroll_to_cursor( struct screen_buffer *screen_buffer ) { int w = screen_buffer->win.right - screen_buffer->win.left + 1; int h = screen_buffer->win.bottom - screen_buffer->win.top + 1; + unsigned int cursor_x = get_bounded_cursor_x(screen_buffer);
- if (screen_buffer->cursor_x < screen_buffer->win.left) - screen_buffer->win.left = min( screen_buffer->cursor_x, screen_buffer->width - w ); - else if (screen_buffer->cursor_x > screen_buffer->win.right) - screen_buffer->win.left = max( screen_buffer->cursor_x, w ) - w + 1; + if (cursor_x < screen_buffer->win.left) + screen_buffer->win.left = min( cursor_x, screen_buffer->width - w ); + else if (cursor_x > screen_buffer->win.right) + screen_buffer->win.left = max( cursor_x, w ) - w + 1; screen_buffer->win.right = screen_buffer->win.left + w - 1;
if (screen_buffer->cursor_y < screen_buffer->win.top) @@ -1209,7 +1210,7 @@ static void update_read_output( struct console *console ) scroll_to_cursor( screen_buffer ); } if (console->is_unix) - set_tty_cursor_relative( screen_buffer->console, screen_buffer->cursor_x, screen_buffer->cursor_y ); + set_tty_cursor_relative( screen_buffer->console, get_bounded_cursor_x(screen_buffer), screen_buffer->cursor_y ); tty_sync( screen_buffer->console ); update_window_config( screen_buffer->console ); } @@ -1356,7 +1357,7 @@ static NTSTATUS read_console( struct console *console, unsigned int ioctl, size_ }
console->edit_line.history_index = console->history_index; - console->edit_line.home_x = console->active->cursor_x; + console->edit_line.home_x = get_bounded_cursor_x(console->active); console->edit_line.home_y = console->active->cursor_y; console->edit_line.status = STATUS_PENDING; if (edit_line_grow( console, 1 )) console->edit_line.buf[0] = 0; @@ -1716,7 +1717,7 @@ static NTSTATUS get_output_info( struct screen_buffer *screen_buffer, size_t *ou
info->cursor_size = screen_buffer->cursor_size; info->cursor_visible = screen_buffer->cursor_visible; - info->cursor_x = screen_buffer->cursor_x; + info->cursor_x = get_bounded_cursor_x(screen_buffer); info->cursor_y = screen_buffer->cursor_y; info->width = screen_buffer->width; info->height = screen_buffer->height; @@ -1917,10 +1918,12 @@ static NTSTATUS write_console( struct screen_buffer *screen_buffer, const WCHAR switch (buffer[i]) { case '\b': - if (screen_buffer->cursor_x) screen_buffer->cursor_x--; + if (screen_buffer->cursor_x && screen_buffer->cursor_x < screen_buffer->width) + screen_buffer->cursor_x--; continue; case '\t': - j = min( screen_buffer->width - screen_buffer->cursor_x, 8 - (screen_buffer->cursor_x % 8) ); + j = screen_buffer->cursor_x < screen_buffer->width ? screen_buffer->cursor_x : 0; + j = min( screen_buffer->width - j, 8 - (j % 8) ); while (j--) write_char( screen_buffer, ' ', &update_rect, NULL ); continue; case '\n': @@ -1946,11 +1949,8 @@ static NTSTATUS write_console( struct screen_buffer *screen_buffer, const WCHAR write_char( screen_buffer, buffer[i], &update_rect, NULL ); }
- if (screen_buffer->cursor_x == screen_buffer->width) - { - if (screen_buffer->mode & ENABLE_WRAP_AT_EOL_OUTPUT) screen_buffer->cursor_x--; - else screen_buffer->cursor_x = update_rect.left; - } + if (screen_buffer->cursor_x == screen_buffer->width && !(screen_buffer->mode & ENABLE_WRAP_AT_EOL_OUTPUT)) + screen_buffer->cursor_x = update_rect.left;
scroll_to_cursor( screen_buffer ); update_output( screen_buffer, &update_rect ); diff --git a/programs/conhost/conhost.h b/programs/conhost/conhost.h index 6f39853..9e855c3 100644 --- a/programs/conhost/conhost.h +++ b/programs/conhost/conhost.h @@ -140,6 +140,11 @@ NTSTATUS write_console_input( struct console *console, const INPUT_RECORD *recor void notify_screen_buffer_size( struct screen_buffer *screen_buffer ); NTSTATUS change_screen_buffer_size( struct screen_buffer *screen_buffer, int new_width, int new_height );
+static inline unsigned int get_bounded_cursor_x( struct screen_buffer *screen_buffer ) +{ + return min(screen_buffer->cursor_x, screen_buffer->width - 1); +} + static inline void empty_update_rect( struct screen_buffer *screen_buffer, RECT *rect ) { SetRect( rect, screen_buffer->width, screen_buffer->height, 0, 0 ); diff --git a/programs/conhost/tests/tty.c b/programs/conhost/tests/tty.c index 7cc37fa..db6c646 100644 --- a/programs/conhost/tests/tty.c +++ b/programs/conhost/tests/tty.c @@ -553,6 +553,8 @@ static void expect_char_key_(unsigned int line, WCHAR ch)
static void test_write_console(void) { + BOOL expect_newline; + child_string_request(REQ_WRITE_CONSOLE, L"abc"); skip_hide_cursor(); expect_output_sequence("abc"); @@ -761,6 +763,71 @@ static void test_write_console(void) expect_empty_output();
child_set_output_mode(ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT); + + child_set_cursor(28, 11); + skip_hide_cursor(); + expect_output_sequence("\x1b[12;29H"); /* set cursor */ + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"a"); + skip_hide_cursor(); + expect_output_sequence("a"); + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"b"); + skip_hide_cursor(); + expect_output_sequence("b"); + expect_newline = TRUE; + if (!skip_sequence("\b")) + { + expect_newline = FALSE; + expect_output_sequence("\r\n"); + } + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"c"); + skip_hide_cursor(); + if (expect_newline) expect_output_sequence("\r\n"); + expect_output_sequence("c"); + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_set_cursor(28, 11); + skip_hide_cursor(); + expect_output_sequence("\x1b[12;29H"); /* set cursor */ + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"x"); + skip_hide_cursor(); + expect_output_sequence("x"); + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"y"); + skip_hide_cursor(); + expect_output_sequence("y"); + expect_newline = TRUE; + if (!skip_sequence("\b")) + { + expect_newline = FALSE; + expect_output_sequence("\r\n"); + } + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"\b"); + expect_empty_output(); + + child_string_request(REQ_WRITE_CONSOLE, L"z"); + skip_hide_cursor(); + if (expect_newline) expect_output_sequence("\r\n"); + expect_output_sequence("z"); + skip_sequence("\x1b[?25h"); /* show cursor */ + expect_empty_output(); }
static void test_tty_output(void) diff --git a/programs/conhost/window.c b/programs/conhost/window.c index a665cbb..456bcdd 100644 --- a/programs/conhost/window.c +++ b/programs/conhost/window.c @@ -430,8 +430,8 @@ static void update_window_cursor( struct console *console ) { if (console->win != GetFocus() || !console->active->cursor_visible) return;
- SetCaretPos( (console->active->cursor_x - console->active->win.left) * console->active->font.width, - (console->active->cursor_y - console->active->win.top) * console->active->font.height ); + SetCaretPos( (get_bounded_cursor_x(console->active) - console->active->win.left) * console->active->font.width, + (console->active->cursor_y - console->active->win.top) * console->active->font.height ); ShowCaret( console->win ); }
@@ -607,10 +607,10 @@ static void update_window( struct console *console ) } }
- if (update_all || console->active->cursor_x != console->window->cursor_pos.X || + if (update_all || get_bounded_cursor_x(console->active) != console->window->cursor_pos.X || console->active->cursor_y != console->window->cursor_pos.Y) { - console->window->cursor_pos.X = console->active->cursor_x; + console->window->cursor_pos.X = get_bounded_cursor_x(console->active); console->window->cursor_pos.Y = console->active->cursor_y; update_window_cursor( console ); }