diff options
Diffstat (limited to 'contrib/ncurses/ncurses/base/resizeterm.c')
| -rw-r--r-- | contrib/ncurses/ncurses/base/resizeterm.c | 249 |
1 files changed, 214 insertions, 35 deletions
diff --git a/contrib/ncurses/ncurses/base/resizeterm.c b/contrib/ncurses/ncurses/base/resizeterm.c index f454b20..46faccb 100644 --- a/contrib/ncurses/ncurses/base/resizeterm.c +++ b/contrib/ncurses/ncurses/base/resizeterm.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 1998,2000,2001 Free Software Foundation, Inc. * + * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * @@ -27,7 +27,7 @@ ****************************************************************************/ /**************************************************************************** - * Author: Thomas E. Dickey <dickey@clark.net> 1996,1997 * + * Author: Thomas E. Dickey * ****************************************************************************/ /* @@ -41,13 +41,191 @@ #include <curses.priv.h> #include <term.h> -MODULE_ID("$Id: resizeterm.c,v 1.13 2002/02/02 19:26:27 tom Exp $") +MODULE_ID("$Id: resizeterm.c,v 1.18 2006/10/14 20:43:31 tom Exp $") + +#define stolen_lines (screen_lines - SP->_lines_avail) + +static int current_lines; +static int current_cols; + +#ifdef TRACE +static void +show_window_sizes(const char *name) +{ + WINDOWLIST *wp; + + _tracef("%s resizing: %2d x %2d (%2d x %2d)", name, LINES, COLS, + screen_lines, screen_columns); + for (wp = _nc_windows; wp != 0; wp = wp->next) { + _tracef(" window %p is %2ld x %2ld at %2ld,%2ld", + &(wp->win), + (long) wp->win._maxy + 1, + (long) wp->win._maxx + 1, + (long) wp->win._begy, + (long) wp->win._begx); + } +} +#endif NCURSES_EXPORT(bool) is_term_resized(int ToLines, int ToCols) { - return (ToLines != screen_lines - || ToCols != screen_columns); + T((T_CALLED("is_term_resized(%d, %d)"), ToLines, ToCols)); + returnCode(ToLines > 0 + && ToCols > 0 + && (ToLines != screen_lines + || ToCols != screen_columns)); +} + +/* + * Return the number of levels of child-windows under the current window. + */ +static int +child_depth(WINDOW *cmp) +{ + int depth = 0; + + if (cmp != 0) { + WINDOWLIST *wp; + + for (wp = _nc_windows; wp != 0; wp = wp->next) { + WINDOW *tst = &(wp->win); + if (tst->_parent == cmp) { + depth = 1 + child_depth(tst); + break; + } + } + } + return depth; +} + +/* + * Return the number of levels of parent-windows above the current window. + */ +static int +parent_depth(WINDOW *cmp) +{ + int depth = 0; + + if (cmp != 0) { + WINDOW *tst; + while ((tst = cmp->_parent) != 0) { + ++depth; + cmp = tst; + } + } + return depth; +} + +/* + * FIXME: must adjust position so it's within the parent! + */ +static int +adjust_window(WINDOW *win, int ToLines, int ToCols, int stolen) +{ + int result; + int bottom = current_lines + SP->_topstolen - stolen; + int myLines = win->_maxy + 1; + int myCols = win->_maxx + 1; + + T((T_CALLED("adjust_window(%p,%d,%d) currently %ldx%ld at %ld,%ld"), + win, ToLines, ToCols, + (long) getmaxy(win), (long) getmaxx(win), + (long) getbegy(win), (long) getbegx(win))); + + if (win->_begy >= bottom) { + win->_begy += (ToLines - current_lines); + } else { + if (myLines == current_lines - stolen + && ToLines != current_lines) + myLines = ToLines - stolen; + else if (myLines == current_lines + && ToLines != current_lines) + myLines = ToLines; + } + + if (myLines > ToLines) + myLines = ToLines; + + if (myCols > ToCols) + myCols = ToCols; + + if (myLines == current_lines + && ToLines != current_lines) + myLines = ToLines; + + if (myCols == current_cols + && ToCols != current_cols) + myCols = ToCols; + + result = wresize(win, myLines, myCols); + returnCode(result); +} + +/* + * If we're decreasing size, recursively search for windows that have no + * children, decrease those to fit, then decrease the containing window, etc. + */ +static int +decrease_size(int ToLines, int ToCols, int stolen) +{ + bool found; + int depth = 0; + WINDOWLIST *wp; + + T((T_CALLED("decrease_size(%d, %d)"), ToLines, ToCols)); + + do { + found = FALSE; + TR(TRACE_UPDATE, ("decreasing size of windows to %dx%d, depth=%d", + ToLines, ToCols, depth)); + for (wp = _nc_windows; wp != 0; wp = wp->next) { + WINDOW *win = &(wp->win); + + if (!(win->_flags & _ISPAD)) { + if (child_depth(win) == depth) { + found = TRUE; + if (adjust_window(win, ToLines, ToCols, stolen) != OK) + returnCode(ERR); + } + } + } + ++depth; + } while (found); + returnCode(OK); +} + +/* + * If we're increasing size, recursively search for windows that have no + * parent, increase those to fit, then increase the contained window, etc. + */ +static int +increase_size(int ToLines, int ToCols, int stolen) +{ + bool found; + int depth = 0; + WINDOWLIST *wp; + + T((T_CALLED("increase_size(%d, %d)"), ToLines, ToCols)); + + do { + found = FALSE; + TR(TRACE_UPDATE, ("increasing size of windows to %dx%d, depth=%d", + ToLines, ToCols, depth)); + for (wp = _nc_windows; wp != 0; wp = wp->next) { + WINDOW *win = &(wp->win); + + if (!(win->_flags & _ISPAD)) { + if (parent_depth(win) == depth) { + found = TRUE; + if (adjust_window(win, ToLines, ToCols, stolen) != OK) + returnCode(ERR); + } + } + } + ++depth; + } while (found); + returnCode(OK); } /* @@ -57,48 +235,42 @@ is_term_resized(int ToLines, int ToCols) NCURSES_EXPORT(int) resize_term(int ToLines, int ToCols) { - int stolen = screen_lines - SP->_lines_avail; - int bottom = screen_lines + SP->_topstolen - stolen; + int result = OK; + int was_stolen = (screen_lines - SP->_lines_avail); T((T_CALLED("resize_term(%d,%d) old(%d,%d)"), ToLines, ToCols, screen_lines, screen_columns)); if (is_term_resized(ToLines, ToCols)) { - WINDOWLIST *wp; + int myLines = current_lines = screen_lines; + int myCols = current_cols = screen_columns; - for (wp = _nc_windows; wp != 0; wp = wp->next) { - WINDOW *win = &(wp->win); - int myLines = win->_maxy + 1; - int myCols = win->_maxx + 1; - - /* pads aren't treated this way */ - if (win->_flags & _ISPAD) - continue; - - if (win->_begy >= bottom) { - win->_begy += (ToLines - screen_lines); - } else { - if (myLines == screen_lines - stolen - && ToLines != screen_lines) - myLines = ToLines - stolen; - else if (myLines == screen_lines - && ToLines != screen_lines) - myLines = ToLines; - } +#ifdef TRACE + if (_nc_tracing & TRACE_UPDATE) + show_window_sizes("before"); +#endif + if (ToLines > screen_lines) { + increase_size(myLines = ToLines, myCols, was_stolen); + current_lines = myLines; + current_cols = myCols; + } - if (myCols == screen_columns - && ToCols != screen_columns) - myCols = ToCols; + if (ToCols > screen_columns) { + increase_size(myLines, myCols = ToCols, was_stolen); + current_lines = myLines; + current_cols = myCols; + } - if (wresize(win, myLines, myCols) != OK) - returnCode(ERR); + if (ToLines < myLines || + ToCols < myCols) { + decrease_size(ToLines, ToCols, was_stolen); } screen_lines = lines = ToLines; screen_columns = columns = ToCols; - SP->_lines_avail = lines - stolen; + SP->_lines_avail = lines - was_stolen; if (SP->oldhash) { FreeAndNull(SP->oldhash); @@ -106,16 +278,23 @@ resize_term(int ToLines, int ToCols) if (SP->newhash) { FreeAndNull(SP->newhash); } +#ifdef TRACE + if (_nc_tracing & TRACE_UPDATE) { + LINES = ToLines - was_stolen; + COLS = ToCols; + show_window_sizes("after"); + } +#endif } /* * Always update LINES, to allow for call from lib_doupdate.c which * needs to have the count adjusted by the stolen (ripped off) lines. */ - LINES = ToLines - stolen; + LINES = ToLines - was_stolen; COLS = ToCols; - returnCode(OK); + returnCode(result); } /* |
