diff options
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | Doc/Zsh/mod_curses.yo | 12 | ||||
| -rw-r--r-- | Src/Modules/curses.c | 50 |
3 files changed, 64 insertions, 1 deletions
@@ -1,5 +1,8 @@ 2007-10-24 Peter Stephenson <p.w.stephenson@ntlworld.com> + * 24018: Doc/Zsh/mod_curses.yo, Src/Modules/curses.c: + add "zcurses scroll". + * 24017: Doc/Zsh/mod_curses.yo, Src/Modules/curses.c: fold color support into attr subcommand and improve error handling; add various readonly parameters; replace strtok(); diff --git a/Doc/Zsh/mod_curses.yo b/Doc/Zsh/mod_curses.yo index a7101f543..b902fce90 100644 --- a/Doc/Zsh/mod_curses.yo +++ b/Doc/Zsh/mod_curses.yo @@ -18,7 +18,8 @@ xitem(tt(zcurses) tt(move) var(targetwin) var(new_y) var(new_x) ) xitem(tt(zcurses) tt(char) var(targetwin) var(character) ) xitem(tt(zcurses) tt(string) var(targetwin) var(string) ) xitem(tt(zcurses) tt(border) var(targetwin) var(border) )( -item(tt(zcurses) tt(attr) var(targetwin) [ var({+/-}attribute) | var(fg_col)tt(/)var(bg_col) ] [...])( +xitem(tt(zcurses) tt(attr) var(targetwin) [ var({+/-}attribute) | var(fg_col)tt(/)var(bg_col) ] [...]) +item(tt(zcurses) tt(scroll) [ tt(on) | tt(off) | {+/-}var(lines) ])( Manipulate curses windows. All uses of this command should be bracketed by `tt(zcurses init)' to initialise use of curses, and `tt(zcurses end)' to end it; omitting `tt(zcurses end)' can cause @@ -53,6 +54,15 @@ supported are tt(blink), tt(bold), tt(dim), tt(reverse), tt(standout), and tt(underline). Each var(fg_col)tt(/)var(bg_col) (to be read as `var(fg_col) on var(bg_col)') sets the foreground and background color for character output. + +tt(scroll) can be used with tt(on) or tt(off) to enabled or disable +scrolling of a window when the cursor would otherwise move below the +window due to typing or output. It can also be used with a positive +or negative integer to scroll the window up or down the given number +of lines without changing the current cursor position (which therefore +appears to move in the opposite direction relative to the window). +In the second case, if scrolling is tt(off) it is temporarily turned tt(on) +to allow the window to be scrolled, ) enditem() diff --git a/Src/Modules/curses.c b/Src/Modules/curses.c index de9173b9e..06ad463e1 100644 --- a/Src/Modules/curses.c +++ b/Src/Modules/curses.c @@ -51,9 +51,15 @@ #include <stdio.h> +enum zc_win_flags { + /* Scrolling enabled */ + ZCWF_SCROLL = 0x0001 +}; + typedef struct zc_win { WINDOW *win; char *name; + int flags; } *ZCWin; struct zcurses_namenumberpair { @@ -620,6 +626,49 @@ zccmd_attr(const char *nam, char **args) } +static int +zccmd_scroll(const char *nam, char **args) +{ + LinkNode node; + ZCWin w; + int ret = 0; + + node = zcurses_validate_window(args[0], ZCURSES_USED); + if (node == NULL) { + zwarnnam(nam, "%s: %s", zcurses_strerror(zc_errno), args[0]); + return 1; + } + + w = (ZCWin)getdata(node); + + if (!strcmp(args[1], "on")) { + if (scrollok(w->win, TRUE) == ERR) + return 1; + w->flags |= ZCWF_SCROLL; + } else if (!strcmp(args[1], "off")) { + if (scrollok(w->win, FALSE) == ERR) + return 1; + w->flags &= ~ZCWF_SCROLL; + } else { + char *endptr; + zlong sl = zstrtol(args[1], &endptr, 10); + if (*endptr) { + zwarnnam(nam, "scroll requires `on', `off' or integer: %s", + args[1]); + return 1; + } + if (!(w->flags & ZCWF_SCROLL)) + scrollok(w->win, TRUE); + if (wscrl(w->win, (int)sl) == ERR) + ret = 1; + if (!(w->flags & ZCWF_SCROLL)) + scrollok(w->win, FALSE); + } + + return ret; +} + + /********************* Main builtin handler *********************/ @@ -643,6 +692,7 @@ bin_zcurses(char *nam, char **args, Options ops, UNUSED(int func)) {"border", zccmd_border, 1, 1}, {"end", zccmd_endwin, 0, 0}, {"attr", zccmd_attr, 2, -1}, + {"scroll", zccmd_scroll, 2, 2}, {NULL, (zccmd_t)0, 0, 0} }; |