From da51dc9cf202772f60bd2da975dbef257bd9237c Mon Sep 17 00:00:00 2001 From: Eliseo Martínez Date: Mon, 12 May 2014 02:25:17 +0200 Subject: Introduce nvim namespace: Move files. Move files from src/ to src/nvim/. - src/nvim/ becomes the new root dir for nvim executable sources. - src/libnvim/ is planned to become root dir of the neovim library. --- src/nvim/message.c | 3881 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 3881 insertions(+) create mode 100644 src/nvim/message.c (limited to 'src/nvim/message.c') diff --git a/src/nvim/message.c b/src/nvim/message.c new file mode 100644 index 0000000000..feb1226e6d --- /dev/null +++ b/src/nvim/message.c @@ -0,0 +1,3881 @@ +/* + * VIM - Vi IMproved by Bram Moolenaar + * + * Do ":help uganda" in Vim to read copying and usage conditions. + * Do ":help credits" in Vim to see a list of people who contributed. + * See README.txt for an overview of the Vim source code. + */ + +/* + * message.c: functions for displaying messages on the command line + */ + +#define MESSAGE_FILE /* don't include prototype for smsg() */ + +#include + +#include "vim.h" +#include "message.h" +#include "charset.h" +#include "eval.h" +#include "ex_eval.h" +#include "fileio.h" +#include "getchar.h" +#include "mbyte.h" +#include "memory.h" +#include "misc1.h" +#include "misc2.h" +#include "keymap.h" +#include "garray.h" +#include "ops.h" +#include "option.h" +#include "normal.h" +#include "screen.h" +#include "term.h" +#include "ui.h" +#include "os/os.h" +#include "os/event.h" + +#if defined(FEAT_FLOAT) +# include +#endif + +static int other_sourcing_name(void); +static char_u *get_emsg_source(void); +static char_u *get_emsg_lnum(void); +static void add_msg_hist(char_u *s, int len, int attr); +static void hit_return_msg(void); +static void msg_home_replace_attr(char_u *fname, int attr); +static char_u *screen_puts_mbyte(char_u *s, int l, int attr); +static void msg_puts_attr_len(char_u *str, int maxlen, int attr); +static void msg_puts_display(char_u *str, int maxlen, int attr, + int recurse); +static void msg_scroll_up(void); +static void inc_msg_scrolled(void); +static void store_sb_text(char_u **sb_str, char_u *s, int attr, + int *sb_col, + int finish); +static void t_puts(int *t_col, char_u *t_s, char_u *s, int attr); +static void msg_puts_printf(char_u *str, int maxlen); +static int do_more_prompt(int typed_char); +static void msg_screen_putchar(int c, int attr); +static int msg_check_screen(void); +static void redir_write(char_u *s, int maxlen); + +/// Allocates memory for dialog string & for storing hotkeys +/// +/// Finds the size of memory required for the confirm_msg & for storing hotkeys +/// and then allocates the memory for them. +/// has_hotkey array is also filled-up. +/// +/// @param message Message which will be part of the confirm_msg +/// @param buttons String containing button names +/// @param[out] has_hotkey A element in this array is set to true if +/// corresponding button has a hotkey +/// +/// @return Pointer to memory allocated for storing hotkeys +static char_u * console_dialog_alloc(const char_u *message, + char_u *buttons, + bool has_hotkey[]); + +/// Copies hotkeys & dialog message into the memory allocated for it +/// +/// @param message Message which will be part of the confirm_msg +/// @param buttons String containing button names +/// @param default_button_idx Number of default button +/// @param has_hotkey A element in this array is true if corresponding button +/// has a hotkey +/// @param[out] hotkeys_ptr Pointer to the memory location where hotkeys will be copied +static void copy_hotkeys_and_msg(const char_u *message, char_u *buttons, + int default_button_idx, const bool has_hotkey[], + char_u *hotkeys_ptr); + +static char_u *msg_show_console_dialog(char_u *message, char_u *buttons, + int dfltbutton); +static int confirm_msg_used = FALSE; /* displaying confirm_msg */ +static char_u *confirm_msg = NULL; /* ":confirm" message */ +static char_u *confirm_msg_tail; /* tail of confirm_msg */ + +struct msg_hist { + struct msg_hist *next; + char_u *msg; + int attr; +}; + +static struct msg_hist *first_msg_hist = NULL; +static struct msg_hist *last_msg_hist = NULL; +static int msg_hist_len = 0; + +static FILE *verbose_fd = NULL; +static int verbose_did_open = FALSE; + +/* + * When writing messages to the screen, there are many different situations. + * A number of variables is used to remember the current state: + * msg_didany TRUE when messages were written since the last time the + * user reacted to a prompt. + * Reset: After hitting a key for the hit-return prompt, + * hitting for the command line or input(). + * Set: When any message is written to the screen. + * msg_didout TRUE when something was written to the current line. + * Reset: When advancing to the next line, when the current + * text can be overwritten. + * Set: When any message is written to the screen. + * msg_nowait No extra delay for the last drawn message. + * Used in normal_cmd() before the mode message is drawn. + * emsg_on_display There was an error message recently. Indicates that there + * should be a delay before redrawing. + * msg_scroll The next message should not overwrite the current one. + * msg_scrolled How many lines the screen has been scrolled (because of + * messages). Used in update_screen() to scroll the screen + * back. Incremented each time the screen scrolls a line. + * msg_scrolled_ign TRUE when msg_scrolled is non-zero and msg_puts_attr() + * writes something without scrolling should not make + * need_wait_return to be set. This is a hack to make ":ts" + * work without an extra prompt. + * lines_left Number of lines available for messages before the + * more-prompt is to be given. -1 when not set. + * need_wait_return TRUE when the hit-return prompt is needed. + * Reset: After giving the hit-return prompt, when the user + * has answered some other prompt. + * Set: When the ruler or typeahead display is overwritten, + * scrolling the screen for some message. + * keep_msg Message to be displayed after redrawing the screen, in + * main_loop(). + * This is an allocated string or NULL when not used. + */ + +/* + * msg(s) - displays the string 's' on the status line + * When terminal not initialized (yet) mch_errmsg(..) is used. + * return TRUE if wait_return not called + */ +int msg(char_u *s) +{ + return msg_attr_keep(s, 0, FALSE); +} + +#if defined(FEAT_EVAL) || defined(FEAT_GUI_GTK) || defined(PROTO) +/* + * Like msg() but keep it silent when 'verbosefile' is set. + */ +int verb_msg(char_u *s) +{ + int n; + + verbose_enter(); + n = msg_attr_keep(s, 0, FALSE); + verbose_leave(); + + return n; +} +#endif + +int msg_attr(char_u *s, int attr) +{ + return msg_attr_keep(s, attr, FALSE); +} + +int +msg_attr_keep ( + char_u *s, + int attr, + int keep /* TRUE: set keep_msg if it doesn't scroll */ +) +{ + static int entered = 0; + int retval; + char_u *buf = NULL; + + if (attr == 0) + set_vim_var_string(VV_STATUSMSG, s, -1); + + /* + * It is possible that displaying a messages causes a problem (e.g., + * when redrawing the window), which causes another message, etc.. To + * break this loop, limit the recursiveness to 3 levels. + */ + if (entered >= 3) + return TRUE; + ++entered; + + /* Add message to history (unless it's a repeated kept message or a + * truncated message) */ + if (s != keep_msg + || (*s != '<' + && last_msg_hist != NULL + && last_msg_hist->msg != NULL + && STRCMP(s, last_msg_hist->msg))) + add_msg_hist(s, -1, attr); + + /* When displaying keep_msg, don't let msg_start() free it, caller must do + * that. */ + if (s == keep_msg) + keep_msg = NULL; + + /* Truncate the message if needed. */ + msg_start(); + buf = msg_strtrunc(s, FALSE); + if (buf != NULL) + s = buf; + + msg_outtrans_attr(s, attr); + msg_clr_eos(); + retval = msg_end(); + + if (keep && retval && vim_strsize(s) < (int)(Rows - cmdline_row - 1) + * Columns + sc_col) + set_keep_msg(s, 0); + + free(buf); + --entered; + return retval; +} + +/* + * Truncate a string such that it can be printed without causing a scroll. + * Returns an allocated string or NULL when no truncating is done. + */ +char_u * +msg_strtrunc ( + char_u *s, + int force /* always truncate */ +) +{ + char_u *buf = NULL; + int len; + int room; + + /* May truncate message to avoid a hit-return prompt */ + if ((!msg_scroll && !need_wait_return && shortmess(SHM_TRUNCALL) + && !exmode_active && msg_silent == 0) || force) { + len = vim_strsize(s); + if (msg_scrolled != 0) + /* Use all the columns. */ + room = (int)(Rows - msg_row) * Columns - 1; + else + /* Use up to 'showcmd' column. */ + room = (int)(Rows - msg_row - 1) * Columns + sc_col - 1; + if (len > room && room > 0) { + if (enc_utf8) + /* may have up to 18 bytes per cell (6 per char, up to two + * composing chars) */ + len = (room + 2) * 18; + else if (enc_dbcs == DBCS_JPNU) + /* may have up to 2 bytes per cell for euc-jp */ + len = (room + 2) * 2; + else + len = room + 2; + buf = alloc(len); + trunc_string(s, buf, room, len); + } + } + return buf; +} + +/* + * Truncate a string "s" to "buf" with cell width "room". + * "s" and "buf" may be equal. + */ +void trunc_string(char_u *s, char_u *buf, int room, int buflen) +{ + int half; + int len; + int e; + int i; + int n; + + room -= 3; + half = room / 2; + len = 0; + + /* First part: Start of the string. */ + for (e = 0; len < half && e < buflen; ++e) { + if (s[e] == NUL) { + /* text fits without truncating! */ + buf[e] = NUL; + return; + } + n = ptr2cells(s + e); + if (len + n >= half) + break; + len += n; + buf[e] = s[e]; + if (has_mbyte) + for (n = (*mb_ptr2len)(s + e); --n > 0; ) { + if (++e == buflen) + break; + buf[e] = s[e]; + } + } + + /* Last part: End of the string. */ + i = e; + if (enc_dbcs != 0) { + /* For DBCS going backwards in a string is slow, but + * computing the cell width isn't too slow: go forward + * until the rest fits. */ + n = vim_strsize(s + i); + while (len + n > room) { + n -= ptr2cells(s + i); + i += (*mb_ptr2len)(s + i); + } + } else if (enc_utf8) { + /* For UTF-8 we can go backwards easily. */ + half = i = (int)STRLEN(s); + for (;; ) { + do + half = half - (*mb_head_off)(s, s + half - 1) - 1; + while (utf_iscomposing(utf_ptr2char(s + half)) && half > 0); + n = ptr2cells(s + half); + if (len + n > room) + break; + len += n; + i = half; + } + } else { + for (i = (int)STRLEN(s); len + (n = ptr2cells(s + i - 1)) <= room; --i) + len += n; + } + + /* Set the middle and copy the last part. */ + if (e + 3 < buflen) { + memmove(buf + e, "...", (size_t)3); + len = (int)STRLEN(s + i) + 1; + if (len >= buflen - e - 3) + len = buflen - e - 3 - 1; + memmove(buf + e + 3, s + i, len); + buf[e + 3 + len - 1] = NUL; + } else { + buf[e - 1] = NUL; /* make sure it is truncated */ + } +} + +/* + * Automatic prototype generation does not understand this function. + * Note: Caller of smgs() and smsg_attr() must check the resulting string is + * shorter than IOSIZE!!! + */ +int vim_snprintf(char *str, size_t str_m, char *fmt, ...); + +int smsg(char_u *s, ...) +{ + va_list arglist; + + va_start(arglist, s); + vim_vsnprintf((char *)IObuff, IOSIZE, (char *)s, arglist, NULL); + va_end(arglist); + return msg(IObuff); +} + +int smsg_attr(int attr, char_u *s, ...) +{ + va_list arglist; + + va_start(arglist, s); + vim_vsnprintf((char *)IObuff, IOSIZE, (char *)s, arglist, NULL); + va_end(arglist); + return msg_attr(IObuff, attr); +} + +/* + * Remember the last sourcing name/lnum used in an error message, so that it + * isn't printed each time when it didn't change. + */ +static int last_sourcing_lnum = 0; +static char_u *last_sourcing_name = NULL; + +/* + * Reset the last used sourcing name/lnum. Makes sure it is displayed again + * for the next error message; + */ +void reset_last_sourcing(void) +{ + free(last_sourcing_name); + last_sourcing_name = NULL; + last_sourcing_lnum = 0; +} + +/* + * Return TRUE if "sourcing_name" differs from "last_sourcing_name". + */ +static int other_sourcing_name(void) +{ + if (sourcing_name != NULL) { + if (last_sourcing_name != NULL) + return STRCMP(sourcing_name, last_sourcing_name) != 0; + return TRUE; + } + return FALSE; +} + +/* + * Get the message about the source, as used for an error message. + * Returns an allocated string with room for one more character. + * Returns NULL when no message is to be given. + */ +static char_u *get_emsg_source(void) +{ + char_u *Buf, *p; + + if (sourcing_name != NULL && other_sourcing_name()) { + p = (char_u *)_("Error detected while processing %s:"); + Buf = alloc((unsigned)(STRLEN(sourcing_name) + STRLEN(p))); + sprintf((char *)Buf, (char *)p, sourcing_name); + return Buf; + } + return NULL; +} + +/* + * Get the message about the source lnum, as used for an error message. + * Returns an allocated string with room for one more character. + * Returns NULL when no message is to be given. + */ +static char_u *get_emsg_lnum(void) +{ + char_u *Buf, *p; + + /* lnum is 0 when executing a command from the command line + * argument, we don't want a line number then */ + if (sourcing_name != NULL + && (other_sourcing_name() || sourcing_lnum != last_sourcing_lnum) + && sourcing_lnum != 0) { + p = (char_u *)_("line %4ld:"); + Buf = alloc((unsigned)(STRLEN(p) + 20)); + sprintf((char *)Buf, (char *)p, (long)sourcing_lnum); + return Buf; + } + return NULL; +} + +/* + * Display name and line number for the source of an error. + * Remember the file name and line number, so that for the next error the info + * is only displayed if it changed. + */ +void msg_source(int attr) +{ + char_u *p; + + ++no_wait_return; + p = get_emsg_source(); + if (p != NULL) { + msg_attr(p, attr); + free(p); + } + p = get_emsg_lnum(); + if (p != NULL) { + msg_attr(p, hl_attr(HLF_N)); + free(p); + last_sourcing_lnum = sourcing_lnum; /* only once for each line */ + } + + /* remember the last sourcing name printed, also when it's empty */ + if (sourcing_name == NULL || other_sourcing_name()) { + free(last_sourcing_name); + if (sourcing_name == NULL) + last_sourcing_name = NULL; + else + last_sourcing_name = vim_strsave(sourcing_name); + } + --no_wait_return; +} + +/* + * Return TRUE if not giving error messages right now: + * If "emsg_off" is set: no error messages at the moment. + * If "msg" is in 'debug': do error message but without side effects. + * If "emsg_skip" is set: never do error messages. + */ +int emsg_not_now(void) +{ + if ((emsg_off > 0 && vim_strchr(p_debug, 'm') == NULL + && vim_strchr(p_debug, 't') == NULL) + || emsg_skip > 0 + ) + return TRUE; + return FALSE; +} + +/* + * emsg() - display an error message + * + * Rings the bell, if appropriate, and calls message() to do the real work + * When terminal not initialized (yet) mch_errmsg(..) is used. + * + * return TRUE if wait_return not called + */ +int emsg(char_u *s) +{ + int attr; + char_u *p; + int ignore = FALSE; + int severe; + + /* Skip this if not giving error messages at the moment. */ + if (emsg_not_now()) + return TRUE; + + called_emsg = TRUE; + ex_exitval = 1; + + /* + * If "emsg_severe" is TRUE: When an error exception is to be thrown, + * prefer this message over previous messages for the same command. + */ + severe = emsg_severe; + emsg_severe = FALSE; + + if (!emsg_off || vim_strchr(p_debug, 't') != NULL) { + /* + * Cause a throw of an error exception if appropriate. Don't display + * the error message in this case. (If no matching catch clause will + * be found, the message will be displayed later on.) "ignore" is set + * when the message should be ignored completely (used for the + * interrupt message). + */ + if (cause_errthrow(s, severe, &ignore) == TRUE) { + if (!ignore) + did_emsg = TRUE; + return TRUE; + } + + /* set "v:errmsg", also when using ":silent! cmd" */ + set_vim_var_string(VV_ERRMSG, s, -1); + + /* + * When using ":silent! cmd" ignore error messages. + * But do write it to the redirection file. + */ + if (emsg_silent != 0) { + msg_start(); + p = get_emsg_source(); + if (p != NULL) { + STRCAT(p, "\n"); + redir_write(p, -1); + free(p); + } + p = get_emsg_lnum(); + if (p != NULL) { + STRCAT(p, "\n"); + redir_write(p, -1); + free(p); + } + redir_write(s, -1); + return TRUE; + } + + /* Reset msg_silent, an error causes messages to be switched back on. */ + msg_silent = 0; + cmd_silent = FALSE; + + if (global_busy) /* break :global command */ + ++global_busy; + + if (p_eb) + beep_flush(); /* also includes flush_buffers() */ + else + flush_buffers(FALSE); /* flush internal buffers */ + did_emsg = TRUE; /* flag for DoOneCmd() */ + } + + emsg_on_display = TRUE; /* remember there is an error message */ + ++msg_scroll; /* don't overwrite a previous message */ + attr = hl_attr(HLF_E); /* set highlight mode for error messages */ + if (msg_scrolled != 0) + need_wait_return = TRUE; /* needed in case emsg() is called after + * wait_return has reset need_wait_return + * and a redraw is expected because + * msg_scrolled is non-zero */ + + /* + * Display name and line number for the source of the error. + */ + msg_source(attr); + + /* + * Display the error message itself. + */ + msg_nowait = FALSE; /* wait for this msg */ + return msg_attr(s, attr); +} + +/* + * Print an error message with one "%s" and one string argument. + */ +int emsg2(char_u *s, char_u *a1) +{ + return emsg3(s, a1, NULL); +} + +/* emsg3() and emsgn() are in misc2.c to avoid warnings for the prototypes. */ + +void emsg_invreg(int name) +{ + EMSG2(_("E354: Invalid register name: '%s'"), transchar(name)); +} + +/* + * Like msg(), but truncate to a single line if p_shm contains 't', or when + * "force" is TRUE. This truncates in another way as for normal messages. + * Careful: The string may be changed by msg_may_trunc()! + * Returns a pointer to the printed message, if wait_return() not called. + */ +char_u *msg_trunc_attr(char_u *s, int force, int attr) +{ + int n; + + /* Add message to history before truncating */ + add_msg_hist(s, -1, attr); + + s = msg_may_trunc(force, s); + + msg_hist_off = TRUE; + n = msg_attr(s, attr); + msg_hist_off = FALSE; + + if (n) + return s; + return NULL; +} + +/* + * Check if message "s" should be truncated at the start (for filenames). + * Return a pointer to where the truncated message starts. + * Note: May change the message by replacing a character with '<'. + */ +char_u *msg_may_trunc(int force, char_u *s) +{ + int n; + int room; + + room = (int)(Rows - cmdline_row - 1) * Columns + sc_col - 1; + if ((force || (shortmess(SHM_TRUNC) && !exmode_active)) + && (n = (int)STRLEN(s) - room) > 0) { + if (has_mbyte) { + int size = vim_strsize(s); + + /* There may be room anyway when there are multibyte chars. */ + if (size <= room) + return s; + + for (n = 0; size >= room; ) { + size -= (*mb_ptr2cells)(s + n); + n += (*mb_ptr2len)(s + n); + } + --n; + } + s += n; + *s = '<'; + } + return s; +} + +static void +add_msg_hist ( + char_u *s, + int len, /* -1 for undetermined length */ + int attr +) +{ + struct msg_hist *p; + + if (msg_hist_off || msg_silent != 0) + return; + + /* Don't let the message history get too big */ + while (msg_hist_len > MAX_MSG_HIST_LEN) + (void)delete_first_msg(); + + /* allocate an entry and add the message at the end of the history */ + p = (struct msg_hist *)alloc((int)sizeof(struct msg_hist)); + if (len < 0) + len = (int)STRLEN(s); + /* remove leading and trailing newlines */ + while (len > 0 && *s == '\n') { + ++s; + --len; + } + while (len > 0 && s[len - 1] == '\n') + --len; + p->msg = vim_strnsave(s, len); + p->next = NULL; + p->attr = attr; + if (last_msg_hist != NULL) + last_msg_hist->next = p; + last_msg_hist = p; + if (first_msg_hist == NULL) + first_msg_hist = last_msg_hist; + ++msg_hist_len; +} + +/* + * Delete the first (oldest) message from the history. + * Returns FAIL if there are no messages. + */ +int delete_first_msg(void) +{ + struct msg_hist *p; + + if (msg_hist_len <= 0) + return FAIL; + p = first_msg_hist; + first_msg_hist = p->next; + if (first_msg_hist == NULL) + last_msg_hist = NULL; /* history is empty */ + free(p->msg); + free(p); + --msg_hist_len; + return OK; +} + +/* + * ":messages" command. + */ +void ex_messages(exarg_T *eap) +{ + struct msg_hist *p; + const char *s; + + msg_hist_off = TRUE; + + s = os_getenv("LANG"); + if (s != NULL && *s != NUL) + msg_attr((char_u *) + _("Messages maintainer: Bram Moolenaar "), + hl_attr(HLF_T)); + + for (p = first_msg_hist; p != NULL && !got_int; p = p->next) + if (p->msg != NULL) + msg_attr(p->msg, p->attr); + + msg_hist_off = FALSE; +} + +/* + * Call this after prompting the user. This will avoid a hit-return message + * and a delay. + */ +void msg_end_prompt(void) +{ + need_wait_return = FALSE; + emsg_on_display = FALSE; + cmdline_row = msg_row; + msg_col = 0; + msg_clr_eos(); + lines_left = -1; +} + +/* + * wait for the user to hit a key (normally a return) + * if 'redraw' is TRUE, clear and redraw the screen + * if 'redraw' is FALSE, just redraw the screen + * if 'redraw' is -1, don't redraw at all + */ +void wait_return(int redraw) +{ + int c; + int oldState; + int tmpState; + int had_got_int; + int save_Recording; + FILE *save_scriptout; + + if (redraw == TRUE) + must_redraw = CLEAR; + + /* If using ":silent cmd", don't wait for a return. Also don't set + * need_wait_return to do it later. */ + if (msg_silent != 0) + return; + + /* + * When inside vgetc(), we can't wait for a typed character at all. + * With the global command (and some others) we only need one return at + * the end. Adjust cmdline_row to avoid the next message overwriting the + * last one. + */ + if (vgetc_busy > 0) + return; + need_wait_return = TRUE; + if (no_wait_return) { + if (!exmode_active) + cmdline_row = msg_row; + return; + } + + redir_off = TRUE; /* don't redirect this message */ + oldState = State; + if (quit_more) { + c = CAR; /* just pretend CR was hit */ + quit_more = FALSE; + got_int = FALSE; + } else if (exmode_active) { + MSG_PUTS(" "); /* make sure the cursor is on the right line */ + c = CAR; /* no need for a return in ex mode */ + got_int = FALSE; + } else { + /* Make sure the hit-return prompt is on screen when 'guioptions' was + * just changed. */ + screenalloc(FALSE); + + State = HITRETURN; + setmouse(); +#ifdef USE_ON_FLY_SCROLL + dont_scroll = TRUE; /* disallow scrolling here */ +#endif + /* Avoid the sequence that the user types ":" at the hit-return prompt + * to start an Ex command, but the file-changed dialog gets in the + * way. */ + if (need_check_timestamps) + check_timestamps(FALSE); + + hit_return_msg(); + + do { + /* Remember "got_int", if it is set vgetc() probably returns a + * CTRL-C, but we need to loop then. */ + had_got_int = got_int; + + /* Don't do mappings here, we put the character back in the + * typeahead buffer. */ + ++no_mapping; + ++allow_keys; + + /* Temporarily disable Recording. If Recording is active, the + * character will be recorded later, since it will be added to the + * typebuf after the loop */ + save_Recording = Recording; + save_scriptout = scriptout; + Recording = FALSE; + scriptout = NULL; + c = safe_vgetc(); + if (had_got_int && !global_busy) + got_int = FALSE; + --no_mapping; + --allow_keys; + Recording = save_Recording; + scriptout = save_scriptout; + + + /* + * Allow scrolling back in the messages. + * Also accept scroll-down commands when messages fill the screen, + * to avoid that typing one 'j' too many makes the messages + * disappear. + */ + if (p_more && !p_cp) { + if (c == 'b' || c == 'k' || c == 'u' || c == 'g' + || c == K_UP || c == K_PAGEUP) { + if (msg_scrolled > Rows) + /* scroll back to show older messages */ + do_more_prompt(c); + else { + msg_didout = FALSE; + c = K_IGNORE; + msg_col = + cmdmsg_rl ? Columns - 1 : + 0; + } + if (quit_more) { + c = CAR; /* just pretend CR was hit */ + quit_more = FALSE; + got_int = FALSE; + } else if (c != K_IGNORE) { + c = K_IGNORE; + hit_return_msg(); + } + } else if (msg_scrolled > Rows - 2 + && (c == 'j' || c == 'd' || c == 'f' + || c == K_DOWN || c == K_PAGEDOWN)) + c = K_IGNORE; + } + } while ((had_got_int && c == Ctrl_C) + || c == K_IGNORE + || c == K_LEFTDRAG || c == K_LEFTRELEASE + || c == K_MIDDLEDRAG || c == K_MIDDLERELEASE + || c == K_RIGHTDRAG || c == K_RIGHTRELEASE + || c == K_MOUSELEFT || c == K_MOUSERIGHT + || c == K_MOUSEDOWN || c == K_MOUSEUP + || (!mouse_has(MOUSE_RETURN) + && mouse_row < msg_row + && (c == K_LEFTMOUSE + || c == K_MIDDLEMOUSE + || c == K_RIGHTMOUSE + || c == K_X1MOUSE + || c == K_X2MOUSE)) + ); + ui_breakcheck(); + /* + * Avoid that the mouse-up event causes visual mode to start. + */ + if (c == K_LEFTMOUSE || c == K_MIDDLEMOUSE || c == K_RIGHTMOUSE + || c == K_X1MOUSE || c == K_X2MOUSE) + (void)jump_to_mouse(MOUSE_SETPOS, NULL, 0); + else if (vim_strchr((char_u *)"\r\n ", c) == NULL && c != Ctrl_C) { + /* Put the character back in the typeahead buffer. Don't use the + * stuff buffer, because lmaps wouldn't work. */ + ins_char_typebuf(c); + do_redraw = TRUE; /* need a redraw even though there is + typeahead */ + } + } + redir_off = FALSE; + + /* + * If the user hits ':', '?' or '/' we get a command line from the next + * line. + */ + if (c == ':' || c == '?' || c == '/') { + if (!exmode_active) + cmdline_row = msg_row; + skip_redraw = TRUE; /* skip redraw once */ + do_redraw = FALSE; + } + + /* + * If the window size changed set_shellsize() will redraw the screen. + * Otherwise the screen is only redrawn if 'redraw' is set and no ':' + * typed. + */ + tmpState = State; + State = oldState; /* restore State before set_shellsize */ + setmouse(); + msg_check(); + +#if defined(UNIX) + /* + * When switching screens, we need to output an extra newline on exit. + */ + if (swapping_screen() && !termcap_active) + newline_on_exit = TRUE; +#endif + + need_wait_return = FALSE; + did_wait_return = TRUE; + emsg_on_display = FALSE; /* can delete error message now */ + lines_left = -1; /* reset lines_left at next msg_start() */ + reset_last_sourcing(); + if (keep_msg != NULL && vim_strsize(keep_msg) >= + (Rows - cmdline_row - 1) * Columns + sc_col) { + free(keep_msg); + keep_msg = NULL; /* don't redisplay message, it's too long */ + } + + if (tmpState == SETWSIZE) { /* got resize event while in vgetc() */ + starttermcap(); /* start termcap before redrawing */ + shell_resized(); + } else if (!skip_redraw + && (redraw == TRUE || (msg_scrolled != 0 && redraw != -1))) { + starttermcap(); /* start termcap before redrawing */ + redraw_later(VALID); + } +} + +/* + * Write the hit-return prompt. + */ +static void hit_return_msg(void) +{ + int save_p_more = p_more; + + p_more = FALSE; /* don't want see this message when scrolling back */ + if (msg_didout) /* start on a new line */ + msg_putchar('\n'); + if (got_int) + MSG_PUTS(_("Interrupt: ")); + + MSG_PUTS_ATTR(_("Press ENTER or type command to continue"), hl_attr(HLF_R)); + if (!msg_use_printf()) + msg_clr_eos(); + p_more = save_p_more; +} + +/* + * Set "keep_msg" to "s". Free the old value and check for NULL pointer. + */ +void set_keep_msg(char_u *s, int attr) +{ + free(keep_msg); + if (s != NULL && msg_silent == 0) + keep_msg = vim_strsave(s); + else + keep_msg = NULL; + keep_msg_more = FALSE; + keep_msg_attr = attr; +} + +/* + * If there currently is a message being displayed, set "keep_msg" to it, so + * that it will be displayed again after redraw. + */ +void set_keep_msg_from_hist(void) +{ + if (keep_msg == NULL && last_msg_hist != NULL && msg_scrolled == 0 + && (State & NORMAL)) + set_keep_msg(last_msg_hist->msg, last_msg_hist->attr); +} + +/* + * Prepare for outputting characters in the command line. + */ +void msg_start(void) +{ + int did_return = FALSE; + + if (!msg_silent) { + free(keep_msg); + keep_msg = NULL; /* don't display old message now */ + } + + if (need_clr_eos) { + /* Halfway an ":echo" command and getting an (error) message: clear + * any text from the command. */ + need_clr_eos = FALSE; + msg_clr_eos(); + } + + if (!msg_scroll && full_screen) { /* overwrite last message */ + msg_row = cmdline_row; + msg_col = + cmdmsg_rl ? Columns - 1 : + 0; + } else if (msg_didout) { /* start message on next line */ + msg_putchar('\n'); + did_return = TRUE; + if (exmode_active != EXMODE_NORMAL) + cmdline_row = msg_row; + } + if (!msg_didany || lines_left < 0) + msg_starthere(); + if (msg_silent == 0) { + msg_didout = FALSE; /* no output on current line yet */ + cursor_off(); + } + + /* when redirecting, may need to start a new line. */ + if (!did_return) + redir_write((char_u *)"\n", -1); +} + +/* + * Note that the current msg position is where messages start. + */ +void msg_starthere(void) +{ + lines_left = cmdline_row; + msg_didany = FALSE; +} + +void msg_putchar(int c) +{ + msg_putchar_attr(c, 0); +} + +void msg_putchar_attr(int c, int attr) +{ + char_u buf[MB_MAXBYTES + 1]; + + if (IS_SPECIAL(c)) { + buf[0] = K_SPECIAL; + buf[1] = K_SECOND(c); + buf[2] = K_THIRD(c); + buf[3] = NUL; + } else { + buf[(*mb_char2bytes)(c, buf)] = NUL; + } + msg_puts_attr(buf, attr); +} + +void msg_outnum(long n) +{ + char_u buf[20]; + + sprintf((char *)buf, "%" PRId64, (int64_t)n); + msg_puts(buf); +} + +void msg_home_replace(char_u *fname) +{ + msg_home_replace_attr(fname, 0); +} + +void msg_home_replace_hl(char_u *fname) +{ + msg_home_replace_attr(fname, hl_attr(HLF_D)); +} + +static void msg_home_replace_attr(char_u *fname, int attr) +{ + char_u *name; + + name = home_replace_save(NULL, fname); + if (name != NULL) + msg_outtrans_attr(name, attr); + free(name); +} + +/* + * Output 'len' characters in 'str' (including NULs) with translation + * if 'len' is -1, output upto a NUL character. + * Use attributes 'attr'. + * Return the number of characters it takes on the screen. + */ +int msg_outtrans(char_u *str) +{ + return msg_outtrans_attr(str, 0); +} + +int msg_outtrans_attr(char_u *str, int attr) +{ + return msg_outtrans_len_attr(str, (int)STRLEN(str), attr); +} + +int msg_outtrans_len(char_u *str, int len) +{ + return msg_outtrans_len_attr(str, len, 0); +} + +/* + * Output one character at "p". Return pointer to the next character. + * Handles multi-byte characters. + */ +char_u *msg_outtrans_one(char_u *p, int attr) +{ + int l; + + if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1) { + msg_outtrans_len_attr(p, l, attr); + return p + l; + } + msg_puts_attr(transchar_byte(*p), attr); + return p + 1; +} + +int msg_outtrans_len_attr(char_u *msgstr, int len, int attr) +{ + int retval = 0; + char_u *str = msgstr; + char_u *plain_start = msgstr; + char_u *s; + int mb_l; + int c; + + /* if MSG_HIST flag set, add message to history */ + if (attr & MSG_HIST) { + add_msg_hist(str, len, attr); + attr &= ~MSG_HIST; + } + + /* If the string starts with a composing character first draw a space on + * which the composing char can be drawn. */ + if (enc_utf8 && utf_iscomposing(utf_ptr2char(msgstr))) + msg_puts_attr((char_u *)" ", attr); + + /* + * Go over the string. Special characters are translated and printed. + * Normal characters are printed several at a time. + */ + while (--len >= 0) { + if (enc_utf8) + /* Don't include composing chars after the end. */ + mb_l = utfc_ptr2len_len(str, len + 1); + else if (has_mbyte) + mb_l = (*mb_ptr2len)(str); + else + mb_l = 1; + if (has_mbyte && mb_l > 1) { + c = (*mb_ptr2char)(str); + if (vim_isprintc(c)) + /* printable multi-byte char: count the cells. */ + retval += (*mb_ptr2cells)(str); + else { + /* unprintable multi-byte char: print the printable chars so + * far and the translation of the unprintable char. */ + if (str > plain_start) + msg_puts_attr_len(plain_start, (int)(str - plain_start), + attr); + plain_start = str + mb_l; + msg_puts_attr(transchar(c), attr == 0 ? hl_attr(HLF_8) : attr); + retval += char2cells(c); + } + len -= mb_l - 1; + str += mb_l; + } else { + s = transchar_byte(*str); + if (s[1] != NUL) { + /* unprintable char: print the printable chars so far and the + * translation of the unprintable char. */ + if (str > plain_start) + msg_puts_attr_len(plain_start, (int)(str - plain_start), + attr); + plain_start = str + 1; + msg_puts_attr(s, attr == 0 ? hl_attr(HLF_8) : attr); + retval += (int)STRLEN(s); + } else + ++retval; + ++str; + } + } + + if (str > plain_start) + /* print the printable chars at the end */ + msg_puts_attr_len(plain_start, (int)(str - plain_start), attr); + + return retval; +} + +void msg_make(char_u *arg) +{ + int i; + static char_u *str = (char_u *)"eeffoc", *rs = (char_u *)"Plon#dqg#vxjduB"; + + arg = skipwhite(arg); + for (i = 5; *arg && i >= 0; --i) + if (*arg++ != str[i]) + break; + if (i < 0) { + msg_putchar('\n'); + for (i = 0; rs[i]; ++i) + msg_putchar(rs[i] - 3); + } +} + +/* + * Output the string 'str' upto a NUL character. + * Return the number of characters it takes on the screen. + * + * If K_SPECIAL is encountered, then it is taken in conjunction with the + * following character and shown as , etc. Any other character + * which is not printable shown in <> form. + * If 'from' is TRUE (lhs of a mapping), a space is shown as . + * If a character is displayed in one of these special ways, is also + * highlighted (its highlight name is '8' in the p_hl variable). + * Otherwise characters are not highlighted. + * This function is used to show mappings, where we want to see how to type + * the character/string -- webb + */ +int +msg_outtrans_special ( + char_u *strstart, + int from /* TRUE for lhs of a mapping */ +) +{ + char_u *str = strstart; + int retval = 0; + char_u *string; + int attr; + int len; + + attr = hl_attr(HLF_8); + while (*str != NUL) { + /* Leading and trailing spaces need to be displayed in <> form. */ + if ((str == strstart || str[1] == NUL) && *str == ' ') { + string = (char_u *)""; + ++str; + } else + string = str2special(&str, from); + len = vim_strsize(string); + /* Highlight special keys */ + msg_puts_attr(string, len > 1 + && (*mb_ptr2len)(string) <= 1 + ? attr : 0); + retval += len; + } + return retval; +} + +/* + * Return the lhs or rhs of a mapping, with the key codes turned into printable + * strings, in an allocated string. + */ +char_u * +str2special_save ( + char_u *str, + int is_lhs /* TRUE for lhs, FALSE for rhs */ +) +{ + garray_T ga; + char_u *p = str; + + ga_init(&ga, 1, 40); + while (*p != NUL) + ga_concat(&ga, str2special(&p, is_lhs)); + ga_append(&ga, NUL); + return (char_u *)ga.ga_data; +} + +/* + * Return the printable string for the key codes at "*sp". + * Used for translating the lhs or rhs of a mapping to printable chars. + * Advances "sp" to the next code. + */ +char_u * +str2special ( + char_u **sp, + int from /* TRUE for lhs of mapping */ +) +{ + int c; + static char_u buf[7]; + char_u *str = *sp; + int modifiers = 0; + int special = FALSE; + + if (has_mbyte) { + char_u *p; + + /* Try to un-escape a multi-byte character. Return the un-escaped + * string if it is a multi-byte character. */ + p = mb_unescape(sp); + if (p != NULL) + return p; + } + + c = *str; + if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL) { + if (str[1] == KS_MODIFIER) { + modifiers = str[2]; + str += 3; + c = *str; + } + if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL) { + c = TO_SPECIAL(str[1], str[2]); + str += 2; + if (c == KS_ZERO) /* display as ^@ or */ + c = NUL; + } + if (IS_SPECIAL(c) || modifiers) /* special key */ + special = TRUE; + } + + if (has_mbyte && !IS_SPECIAL(c)) { + int len = (*mb_ptr2len)(str); + + /* For multi-byte characters check for an illegal byte. */ + if (has_mbyte && MB_BYTE2LEN(*str) > len) { + transchar_nonprint(buf, c); + *sp = str + 1; + return buf; + } + /* Since 'special' is TRUE the multi-byte character 'c' will be + * processed by get_special_key_name() */ + c = (*mb_ptr2char)(str); + *sp = str + len; + } else + *sp = str + 1; + + /* Make unprintable characters in <> form, also and . + * Use only for lhs of a mapping. */ + if (special || char2cells(c) > 1 || (from && c == ' ')) + return get_special_key_name(c, modifiers); + buf[0] = c; + buf[1] = NUL; + return buf; +} + +/* + * Translate a key sequence into special key names. + */ +void str2specialbuf(char_u *sp, char_u *buf, int len) +{ + char_u *s; + + *buf = NUL; + while (*sp) { + s = str2special(&sp, FALSE); + if ((int)(STRLEN(s) + STRLEN(buf)) < len) + STRCAT(buf, s); + } +} + +/* + * print line for :print or :list command + */ +void msg_prt_line(char_u *s, int list) +{ + int c; + int col = 0; + int n_extra = 0; + int c_extra = 0; + char_u *p_extra = NULL; /* init to make SASC shut up */ + int n; + int attr = 0; + char_u *trail = NULL; + int l; + char_u buf[MB_MAXBYTES + 1]; + + if (curwin->w_p_list) + list = TRUE; + + /* find start of trailing whitespace */ + if (list && lcs_trail) { + trail = s + STRLEN(s); + while (trail > s && vim_iswhite(trail[-1])) + --trail; + } + + /* output a space for an empty line, otherwise the line will be + * overwritten */ + if (*s == NUL && !(list && lcs_eol != NUL)) + msg_putchar(' '); + + while (!got_int) { + if (n_extra > 0) { + --n_extra; + if (c_extra) + c = c_extra; + else + c = *p_extra++; + } else if (has_mbyte && (l = (*mb_ptr2len)(s)) > 1) { + col += (*mb_ptr2cells)(s); + if (lcs_nbsp != NUL && list && mb_ptr2char(s) == 160) { + mb_char2bytes(lcs_nbsp, buf); + buf[(*mb_ptr2len)(buf)] = NUL; + } else { + memmove(buf, s, (size_t)l); + buf[l] = NUL; + } + msg_puts(buf); + s += l; + continue; + } else { + attr = 0; + c = *s++; + if (c == TAB && (!list || lcs_tab1)) { + /* tab amount depends on current column */ + n_extra = curbuf->b_p_ts - col % curbuf->b_p_ts - 1; + if (!list) { + c = ' '; + c_extra = ' '; + } else { + c = lcs_tab1; + c_extra = lcs_tab2; + attr = hl_attr(HLF_8); + } + } else if (c == 160 && list && lcs_nbsp != NUL) { + c = lcs_nbsp; + attr = hl_attr(HLF_8); + } else if (c == NUL && list && lcs_eol != NUL) { + p_extra = (char_u *)""; + c_extra = NUL; + n_extra = 1; + c = lcs_eol; + attr = hl_attr(HLF_AT); + --s; + } else if (c != NUL && (n = byte2cells(c)) > 1) { + n_extra = n - 1; + p_extra = transchar_byte(c); + c_extra = NUL; + c = *p_extra++; + /* Use special coloring to be able to distinguish from + * the same in plain text. */ + attr = hl_attr(HLF_8); + } else if (c == ' ' && trail != NULL && s > trail) { + c = lcs_trail; + attr = hl_attr(HLF_8); + } + } + + if (c == NUL) + break; + + msg_putchar_attr(c, attr); + col++; + } + msg_clr_eos(); +} + +/* + * Use screen_puts() to output one multi-byte character. + * Return the pointer "s" advanced to the next character. + */ +static char_u *screen_puts_mbyte(char_u *s, int l, int attr) +{ + int cw; + + msg_didout = TRUE; /* remember that line is not empty */ + cw = (*mb_ptr2cells)(s); + if (cw > 1 && ( + cmdmsg_rl ? msg_col <= 1 : + msg_col == Columns - 1)) { + /* Doesn't fit, print a highlighted '>' to fill it up. */ + msg_screen_putchar('>', hl_attr(HLF_AT)); + return s; + } + + screen_puts_len(s, l, msg_row, msg_col, attr); + if (cmdmsg_rl) { + msg_col -= cw; + if (msg_col == 0) { + msg_col = Columns; + ++msg_row; + } + } else { + msg_col += cw; + if (msg_col >= Columns) { + msg_col = 0; + ++msg_row; + } + } + return s + l; +} + +/* + * Output a string to the screen at position msg_row, msg_col. + * Update msg_row and msg_col for the next message. + */ +void msg_puts(char_u *s) +{ + msg_puts_attr(s, 0); +} + +void msg_puts_title(char_u *s) +{ + msg_puts_attr(s, hl_attr(HLF_T)); +} + +/* + * Show a message in such a way that it always fits in the line. Cut out a + * part in the middle and replace it with "..." when necessary. + * Does not handle multi-byte characters! + */ +void msg_puts_long_attr(char_u *longstr, int attr) +{ + msg_puts_long_len_attr(longstr, (int)STRLEN(longstr), attr); +} + +void msg_puts_long_len_attr(char_u *longstr, int len, int attr) +{ + int slen = len; + int room; + + room = Columns - msg_col; + if (len > room && room >= 20) { + slen = (room - 3) / 2; + msg_outtrans_len_attr(longstr, slen, attr); + msg_puts_attr((char_u *)"...", hl_attr(HLF_8)); + } + msg_outtrans_len_attr(longstr + len - slen, slen, attr); +} + +/* + * Basic function for writing a message with highlight attributes. + */ +void msg_puts_attr(char_u *s, int attr) +{ + msg_puts_attr_len(s, -1, attr); +} + +/* + * Like msg_puts_attr(), but with a maximum length "maxlen" (in bytes). + * When "maxlen" is -1 there is no maximum length. + * When "maxlen" is >= 0 the message is not put in the history. + */ +static void msg_puts_attr_len(char_u *str, int maxlen, int attr) +{ + /* + * If redirection is on, also write to the redirection file. + */ + redir_write(str, maxlen); + + /* + * Don't print anything when using ":silent cmd". + */ + if (msg_silent != 0) + return; + + /* if MSG_HIST flag set, add message to history */ + if ((attr & MSG_HIST) && maxlen < 0) { + add_msg_hist(str, -1, attr); + attr &= ~MSG_HIST; + } + + /* + * When writing something to the screen after it has scrolled, requires a + * wait-return prompt later. Needed when scrolling, resetting + * need_wait_return after some prompt, and then outputting something + * without scrolling + */ + if (msg_scrolled != 0 && !msg_scrolled_ign) + need_wait_return = TRUE; + msg_didany = TRUE; /* remember that something was outputted */ + + /* + * If there is no valid screen, use fprintf so we can see error messages. + * If termcap is not active, we may be writing in an alternate console + * window, cursor positioning may not work correctly (window size may be + * different, e.g. for Win32 console) or we just don't know where the + * cursor is. + */ + if (msg_use_printf()) + msg_puts_printf(str, maxlen); + else + msg_puts_display(str, maxlen, attr, FALSE); +} + +/* + * The display part of msg_puts_attr_len(). + * May be called recursively to display scroll-back text. + */ +static void msg_puts_display(char_u *str, int maxlen, int attr, int recurse) +{ + char_u *s = str; + char_u *t_s = str; /* string from "t_s" to "s" is still todo */ + int t_col = 0; /* screen cells todo, 0 when "t_s" not used */ + int l; + int cw; + char_u *sb_str = str; + int sb_col = msg_col; + int wrap; + int did_last_char; + + did_wait_return = FALSE; + while ((maxlen < 0 || (int)(s - str) < maxlen) && *s != NUL) { + /* + * We are at the end of the screen line when: + * - When outputting a newline. + * - When outputting a character in the last column. + */ + if (!recurse && msg_row >= Rows - 1 && (*s == '\n' || ( + cmdmsg_rl + ? ( + msg_col <= 1 + || (*s == TAB && msg_col <= 7) + || (has_mbyte && + (*mb_ptr2cells)(s) > 1 && + msg_col <= 2) + ) + : + (msg_col + t_col >= Columns - 1 + || (*s == TAB && msg_col + + t_col >= ((Columns - 1) & ~7)) + || (has_mbyte && + (*mb_ptr2cells)(s) > 1 + && msg_col + t_col >= + Columns - 2) + )))) { + /* + * The screen is scrolled up when at the last row (some terminals + * scroll automatically, some don't. To avoid problems we scroll + * ourselves). + */ + if (t_col > 0) + /* output postponed text */ + t_puts(&t_col, t_s, s, attr); + + /* When no more prompt and no more room, truncate here */ + if (msg_no_more && lines_left == 0) + break; + + /* Scroll the screen up one line. */ + msg_scroll_up(); + + msg_row = Rows - 2; + if (msg_col >= Columns) /* can happen after screen resize */ + msg_col = Columns - 1; + + /* Display char in last column before showing more-prompt. */ + if (*s >= ' ' + && !cmdmsg_rl + ) { + if (has_mbyte) { + if (enc_utf8 && maxlen >= 0) + /* avoid including composing chars after the end */ + l = utfc_ptr2len_len(s, (int)((str + maxlen) - s)); + else + l = (*mb_ptr2len)(s); + s = screen_puts_mbyte(s, l, attr); + } else + msg_screen_putchar(*s++, attr); + did_last_char = TRUE; + } else + did_last_char = FALSE; + + if (p_more) + /* store text for scrolling back */ + store_sb_text(&sb_str, s, attr, &sb_col, TRUE); + + inc_msg_scrolled(); + need_wait_return = TRUE; /* may need wait_return in main() */ + if (must_redraw < VALID) + must_redraw = VALID; + redraw_cmdline = TRUE; + if (cmdline_row > 0 && !exmode_active) + --cmdline_row; + + /* + * If screen is completely filled and 'more' is set then wait + * for a character. + */ + if (lines_left > 0) + --lines_left; + if (p_more && lines_left == 0 && State != HITRETURN + && !msg_no_more && !exmode_active) { + if (do_more_prompt(NUL)) + s = confirm_msg_tail; + if (quit_more) + return; + } + + /* When we displayed a char in last column need to check if there + * is still more. */ + if (did_last_char) + continue; + } + + wrap = *s == '\n' + || msg_col + t_col >= Columns + || (has_mbyte && (*mb_ptr2cells)(s) > 1 + && msg_col + t_col >= Columns - 1) + ; + if (t_col > 0 && (wrap || *s == '\r' || *s == '\b' + || *s == '\t' || *s == BELL)) + /* output any postponed text */ + t_puts(&t_col, t_s, s, attr); + + if (wrap && p_more && !recurse) + /* store text for scrolling back */ + store_sb_text(&sb_str, s, attr, &sb_col, TRUE); + + if (*s == '\n') { /* go to next line */ + msg_didout = FALSE; /* remember that line is empty */ + if (cmdmsg_rl) + msg_col = Columns - 1; + else + msg_col = 0; + if (++msg_row >= Rows) /* safety check */ + msg_row = Rows - 1; + } else if (*s == '\r') { /* go to column 0 */ + msg_col = 0; + } else if (*s == '\b') { /* go to previous char */ + if (msg_col) + --msg_col; + } else if (*s == TAB) { /* translate Tab into spaces */ + do + msg_screen_putchar(' ', attr); + while (msg_col & 7); + } else if (*s == BELL) /* beep (from ":sh") */ + vim_beep(); + else { + if (has_mbyte) { + cw = (*mb_ptr2cells)(s); + if (enc_utf8 && maxlen >= 0) + /* avoid including composing chars after the end */ + l = utfc_ptr2len_len(s, (int)((str + maxlen) - s)); + else + l = (*mb_ptr2len)(s); + } else { + cw = 1; + l = 1; + } + /* When drawing from right to left or when a double-wide character + * doesn't fit, draw a single character here. Otherwise collect + * characters and draw them all at once later. */ + if ( + cmdmsg_rl + || + (cw > 1 && msg_col + t_col >= Columns - 1) + ) { + if (l > 1) + s = screen_puts_mbyte(s, l, attr) - 1; + else + msg_screen_putchar(*s, attr); + } else { + /* postpone this character until later */ + if (t_col == 0) + t_s = s; + t_col += cw; + s += l - 1; + } + } + ++s; + } + + /* output any postponed text */ + if (t_col > 0) + t_puts(&t_col, t_s, s, attr); + if (p_more && !recurse) + store_sb_text(&sb_str, s, attr, &sb_col, FALSE); + + msg_check(); +} + +/* + * Scroll the screen up one line for displaying the next message line. + */ +static void msg_scroll_up(void) +{ + /* scrolling up always works */ + screen_del_lines(0, 0, 1, (int)Rows, TRUE, NULL); + + if (!can_clear((char_u *)" ")) { + /* Scrolling up doesn't result in the right background. Set the + * background here. It's not efficient, but avoids that we have to do + * it all over the code. */ + screen_fill((int)Rows - 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0); + + /* Also clear the last char of the last but one line if it was not + * cleared before to avoid a scroll-up. */ + if (ScreenAttrs[LineOffset[Rows - 2] + Columns - 1] == (sattr_T)-1) + screen_fill((int)Rows - 2, (int)Rows - 1, + (int)Columns - 1, (int)Columns, ' ', ' ', 0); + } +} + +/* + * Increment "msg_scrolled". + */ +static void inc_msg_scrolled(void) +{ + if (*get_vim_var_str(VV_SCROLLSTART) == NUL) { + char_u *p = sourcing_name; + char_u *tofree = NULL; + int len; + + /* v:scrollstart is empty, set it to the script/function name and line + * number */ + if (p == NULL) + p = (char_u *)_("Unknown"); + else { + len = (int)STRLEN(p) + 40; + tofree = alloc(len); + vim_snprintf((char *)tofree, len, _("%s line %" PRId64), + p, (int64_t)sourcing_lnum); + p = tofree; + } + set_vim_var_string(VV_SCROLLSTART, p, -1); + free(tofree); + } + ++msg_scrolled; +} + +/* + * To be able to scroll back at the "more" and "hit-enter" prompts we need to + * store the displayed text and remember where screen lines start. + */ +typedef struct msgchunk_S msgchunk_T; +struct msgchunk_S { + msgchunk_T *sb_next; + msgchunk_T *sb_prev; + char sb_eol; /* TRUE when line ends after this text */ + int sb_msg_col; /* column in which text starts */ + int sb_attr; /* text attributes */ + char_u sb_text[1]; /* text to be displayed, actually longer */ +}; + +static msgchunk_T *last_msgchunk = NULL; /* last displayed text */ + +static msgchunk_T *msg_sb_start(msgchunk_T *mps); +static msgchunk_T *disp_sb_line(int row, msgchunk_T *smp); + +static int do_clear_sb_text = FALSE; /* clear text on next msg */ + +/* + * Store part of a printed message for displaying when scrolling back. + */ +static void +store_sb_text ( + char_u **sb_str, /* start of string */ + char_u *s, /* just after string */ + int attr, + int *sb_col, + int finish /* line ends */ +) +{ + msgchunk_T *mp; + + if (do_clear_sb_text) { + clear_sb_text(); + do_clear_sb_text = FALSE; + } + + if (s > *sb_str) { + mp = (msgchunk_T *)alloc((int)(sizeof(msgchunk_T) + (s - *sb_str))); + mp->sb_eol = finish; + mp->sb_msg_col = *sb_col; + mp->sb_attr = attr; + vim_strncpy(mp->sb_text, *sb_str, s - *sb_str); + + if (last_msgchunk == NULL) { + last_msgchunk = mp; + mp->sb_prev = NULL; + } else { + mp->sb_prev = last_msgchunk; + last_msgchunk->sb_next = mp; + last_msgchunk = mp; + } + mp->sb_next = NULL; + } else if (finish && last_msgchunk != NULL) + last_msgchunk->sb_eol = TRUE; + + *sb_str = s; + *sb_col = 0; +} + +/* + * Finished showing messages, clear the scroll-back text on the next message. + */ +void may_clear_sb_text(void) +{ + do_clear_sb_text = TRUE; +} + +/* + * Clear any text remembered for scrolling back. + * Called when redrawing the screen. + */ +void clear_sb_text(void) +{ + msgchunk_T *mp; + + while (last_msgchunk != NULL) { + mp = last_msgchunk->sb_prev; + free(last_msgchunk); + last_msgchunk = mp; + } +} + +/* + * "g<" command. + */ +void show_sb_text(void) +{ + msgchunk_T *mp; + + /* Only show something if there is more than one line, otherwise it looks + * weird, typing a command without output results in one line. */ + mp = msg_sb_start(last_msgchunk); + if (mp == NULL || mp->sb_prev == NULL) + vim_beep(); + else { + do_more_prompt('G'); + wait_return(FALSE); + } +} + +/* + * Move to the start of screen line in already displayed text. + */ +static msgchunk_T *msg_sb_start(msgchunk_T *mps) +{ + msgchunk_T *mp = mps; + + while (mp != NULL && mp->sb_prev != NULL && !mp->sb_prev->sb_eol) + mp = mp->sb_prev; + return mp; +} + +/* + * Mark the last message chunk as finishing the line. + */ +void msg_sb_eol(void) +{ + if (last_msgchunk != NULL) + last_msgchunk->sb_eol = TRUE; +} + +/* + * Display a screen line from previously displayed text at row "row". + * Returns a pointer to the text for the next line (can be NULL). + */ +static msgchunk_T *disp_sb_line(int row, msgchunk_T *smp) +{ + msgchunk_T *mp = smp; + char_u *p; + + for (;; ) { + msg_row = row; + msg_col = mp->sb_msg_col; + p = mp->sb_text; + if (*p == '\n') /* don't display the line break */ + ++p; + msg_puts_display(p, -1, mp->sb_attr, TRUE); + if (mp->sb_eol || mp->sb_next == NULL) + break; + mp = mp->sb_next; + } + return mp->sb_next; +} + +/* + * Output any postponed text for msg_puts_attr_len(). + */ +static void t_puts(int *t_col, char_u *t_s, char_u *s, int attr) +{ + /* output postponed text */ + msg_didout = TRUE; /* remember that line is not empty */ + screen_puts_len(t_s, (int)(s - t_s), msg_row, msg_col, attr); + msg_col += *t_col; + *t_col = 0; + /* If the string starts with a composing character don't increment the + * column position for it. */ + if (enc_utf8 && utf_iscomposing(utf_ptr2char(t_s))) + --msg_col; + if (msg_col >= Columns) { + msg_col = 0; + ++msg_row; + } +} + +/* + * Returns TRUE when messages should be printed with mch_errmsg(). + * This is used when there is no valid screen, so we can see error messages. + * If termcap is not active, we may be writing in an alternate console + * window, cursor positioning may not work correctly (window size may be + * different, e.g. for Win32 console) or we just don't know where the + * cursor is. + */ +int msg_use_printf(void) +{ + return !msg_check_screen() + || (swapping_screen() && !termcap_active) + ; +} + +/* + * Print a message when there is no valid screen. + */ +static void msg_puts_printf(char_u *str, int maxlen) +{ + char_u *s = str; + char_u buf[4]; + char_u *p; + + while (*s != NUL && (maxlen < 0 || (int)(s - str) < maxlen)) { + if (!(silent_mode && p_verbose == 0)) { + /* NL --> CR NL translation (for Unix, not for "--version") */ + /* NL --> CR translation (for Mac) */ + p = &buf[0]; + if (*s == '\n' && !info_message) + *p++ = '\r'; +#if defined(USE_CR) && !defined(MACOS_X_UNIX) + else +#endif + *p++ = *s; + *p = '\0'; + if (info_message) /* informative message, not an error */ + mch_msg((char *)buf); + else + mch_errmsg((char *)buf); + } + + /* primitive way to compute the current column */ + if (cmdmsg_rl) { + if (*s == '\r' || *s == '\n') + msg_col = Columns - 1; + else + --msg_col; + } else { + if (*s == '\r' || *s == '\n') + msg_col = 0; + else + ++msg_col; + } + ++s; + } + msg_didout = TRUE; /* assume that line is not empty */ + +} + +/* + * Show the more-prompt and handle the user response. + * This takes care of scrolling back and displaying previously displayed text. + * When at hit-enter prompt "typed_char" is the already typed character, + * otherwise it's NUL. + * Returns TRUE when jumping ahead to "confirm_msg_tail". + */ +static int do_more_prompt(int typed_char) +{ + int used_typed_char = typed_char; + int oldState = State; + int c; + int retval = FALSE; + int toscroll; + msgchunk_T *mp_last = NULL; + msgchunk_T *mp; + int i; + + if (typed_char == 'G') { + /* "g<": Find first line on the last page. */ + mp_last = msg_sb_start(last_msgchunk); + for (i = 0; i < Rows - 2 && mp_last != NULL + && mp_last->sb_prev != NULL; ++i) + mp_last = msg_sb_start(mp_last->sb_prev); + } + + State = ASKMORE; + setmouse(); + if (typed_char == NUL) + msg_moremsg(FALSE); + for (;; ) { + /* + * Get a typed character directly from the user. + */ + if (used_typed_char != NUL) { + c = used_typed_char; /* was typed at hit-enter prompt */ + used_typed_char = NUL; + } else + c = get_keystroke(); + + + toscroll = 0; + switch (c) { + case K_EVENT: + event_process(); + break; + case BS: /* scroll one line back */ + case K_BS: + case 'k': + case K_UP: + toscroll = -1; + break; + + case CAR: /* one extra line */ + case NL: + case 'j': + case K_DOWN: + toscroll = 1; + break; + + case 'u': /* Up half a page */ + toscroll = -(Rows / 2); + break; + + case 'd': /* Down half a page */ + toscroll = Rows / 2; + break; + + case 'b': /* one page back */ + case K_PAGEUP: + toscroll = -(Rows - 1); + break; + + case ' ': /* one extra page */ + case 'f': + case K_PAGEDOWN: + case K_LEFTMOUSE: + toscroll = Rows - 1; + break; + + case 'g': /* all the way back to the start */ + toscroll = -999999; + break; + + case 'G': /* all the way to the end */ + toscroll = 999999; + lines_left = 999999; + break; + + case ':': /* start new command line */ + if (!confirm_msg_used) { + /* Since got_int is set all typeahead will be flushed, but we + * want to keep this ':', remember that in a special way. */ + typeahead_noflush(':'); + cmdline_row = Rows - 1; /* put ':' on this line */ + skip_redraw = TRUE; /* skip redraw once */ + need_wait_return = FALSE; /* don't wait in main() */ + } + /*FALLTHROUGH*/ + case 'q': /* quit */ + case Ctrl_C: + case ESC: + if (confirm_msg_used) { + /* Jump to the choices of the dialog. */ + retval = TRUE; + } else { + got_int = TRUE; + quit_more = TRUE; + } + /* When there is some more output (wrapping line) display that + * without another prompt. */ + lines_left = Rows - 1; + break; + + default: /* no valid response */ + msg_moremsg(TRUE); + continue; + } + + if (toscroll != 0) { + if (toscroll < 0) { + /* go to start of last line */ + if (mp_last == NULL) + mp = msg_sb_start(last_msgchunk); + else if (mp_last->sb_prev != NULL) + mp = msg_sb_start(mp_last->sb_prev); + else + mp = NULL; + + /* go to start of line at top of the screen */ + for (i = 0; i < Rows - 2 && mp != NULL && mp->sb_prev != NULL; + ++i) + mp = msg_sb_start(mp->sb_prev); + + if (mp != NULL && mp->sb_prev != NULL) { + /* Find line to be displayed at top. */ + for (i = 0; i > toscroll; --i) { + if (mp == NULL || mp->sb_prev == NULL) + break; + mp = msg_sb_start(mp->sb_prev); + if (mp_last == NULL) + mp_last = msg_sb_start(last_msgchunk); + else + mp_last = msg_sb_start(mp_last->sb_prev); + } + + if (toscroll == -1 && screen_ins_lines(0, 0, 1, + (int)Rows, NULL) == OK) { + /* display line at top */ + (void)disp_sb_line(0, mp); + } else { + /* redisplay all lines */ + screenclear(); + for (i = 0; mp != NULL && i < Rows - 1; ++i) { + mp = disp_sb_line(i, mp); + ++msg_scrolled; + } + } + toscroll = 0; + } + } else { + /* First display any text that we scrolled back. */ + while (toscroll > 0 && mp_last != NULL) { + /* scroll up, display line at bottom */ + msg_scroll_up(); + inc_msg_scrolled(); + screen_fill((int)Rows - 2, (int)Rows - 1, 0, + (int)Columns, ' ', ' ', 0); + mp_last = disp_sb_line((int)Rows - 2, mp_last); + --toscroll; + } + } + + if (toscroll <= 0) { + /* displayed the requested text, more prompt again */ + screen_fill((int)Rows - 1, (int)Rows,