X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Fresizeterm.c;h=0f3ea72b7fb9cbc0c28fa8d80b21fa2f36c30943;hp=860355024cc39e67e9de31671fab3f0f7df22e1a;hb=7a6bbc8cf41c5186d46accc3d08622dc86526b34;hpb=0eb88fc5281804773e2a0c7a488a4452463535ce diff --git a/ncurses/base/resizeterm.c b/ncurses/base/resizeterm.c index 86035502..0f3ea72b 100644 --- a/ncurses/base/resizeterm.c +++ b/ncurses/base/resizeterm.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 1998 Free Software Foundation, Inc. * + * Copyright (c) 1998-2008,2009 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 1996,1997 * + * Author: Thomas E. Dickey * ****************************************************************************/ /* @@ -41,7 +41,347 @@ #include #include -MODULE_ID("$Id: resizeterm.c,v 1.7 1998/09/19 19:27:43 Alexander.V.Lukyanov Exp $") +MODULE_ID("$Id: resizeterm.c,v 1.35 2009/04/18 20:32:33 tom Exp $") + +#define stolen_lines (screen_lines - SP->_lines_avail) + +/* + * If we're trying to be reentrant, do not want any local statics. + */ +#if USE_REENTRANT +#define EXTRA_ARGS , CurLines, CurCols +#define EXTRA_DCLS , int CurLines, int CurCols +#else +static int current_lines; +static int current_cols; +#define CurLines current_lines +#define CurCols current_cols +#define EXTRA_ARGS /* nothing */ +#define EXTRA_DCLS /* nothing */ +#endif + +#ifdef TRACE +static void +show_window_sizes(const char *name) +{ + WINDOWLIST *wp; + + _nc_lock_global(curses); + _tracef("%s resizing: %2d x %2d (%2d x %2d)", name, LINES, COLS, + screen_lines(CURRENT_SCREEN), screen_columns(CURRENT_SCREEN)); + for (each_window(wp)) { + _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); + } + _nc_unlock_global(curses); +} +#endif + +/* + * Return true if the given dimensions do not match the internal terminal + * structure's size. + */ +NCURSES_EXPORT(bool) +is_term_resized(int ToLines, int ToCols) +{ + T((T_CALLED("is_term_resized(%d, %d)"), ToLines, ToCols)); + returnCode(ToLines > 0 + && ToCols > 0 + && (ToLines != screen_lines(CURRENT_SCREEN) + || ToCols != screen_columns(CURRENT_SCREEN))); +} + +/* + */ +static ripoff_t * +ripped_window(WINDOW *win) +{ + ripoff_t *result = 0; + ripoff_t *rop; + + if (win != 0) { + for (each_ripoff(rop)) { + if (rop->win == win && rop->line != 0) { + result = rop; + break; + } + } + } + return result; +} + +/* + * Returns the number of lines from the bottom for the beginning of a ripped + * off window. + */ +static int +ripped_bottom(WINDOW *win) +{ + int result = 0; + ripoff_t *rop; + + if (win != 0) { + for (each_ripoff(rop)) { + if (rop->line < 0) { + result -= rop->line; + if (rop->win == win) { + break; + } + } + } + } + return result; +} + +/* + * 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 (each_window(wp)) { + 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 EXTRA_DCLS) +{ + int result; + int bottom = CurLines + SP->_topstolen - stolen; + int myLines = win->_maxy + 1; + int myCols = win->_maxx + 1; + ripoff_t *rop = ripped_window(win); + + T((T_CALLED("adjust_window(%p,%d,%d)%s depth %d/%d currently %ldx%ld at %ld,%ld"), + win, ToLines, ToCols, + (rop != 0) ? " (rip)" : "", + parent_depth(win), + child_depth(win), + (long) getmaxy(win), (long) getmaxx(win), + (long) getbegy(win) + win->_yoffset, (long) getbegx(win))); + + if (rop != 0 && rop->line < 0) { + /* + * If it is a ripped-off window at the bottom of the screen, simply + * move it to the same relative position. + */ + win->_begy = ToLines - ripped_bottom(win) - 0 - win->_yoffset; + } else if (win->_begy >= bottom) { + /* + * If it is below the bottom of the new screen, move up by the same + * amount that the screen shrank. + */ + win->_begy += (ToLines - CurLines); + } else { + if (myLines == (CurLines - stolen) + && ToLines != CurLines) { + myLines = ToLines - stolen; + } else if (myLines == CurLines + && ToLines != CurLines) { + myLines = ToLines; + } + } + + if (myLines > ToLines) { + myLines = ToLines; + } + + if (myCols > ToCols) + myCols = ToCols; + + if (myCols == CurCols + && ToCols != CurCols) + 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 EXTRA_DCLS) +{ + 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 (each_window(wp)) { + WINDOW *win = &(wp->win); + + if (!(win->_flags & _ISPAD)) { + if (child_depth(win) == depth) { + found = TRUE; + if (adjust_window(win, ToLines, ToCols, + stolen EXTRA_ARGS) != 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 EXTRA_DCLS) +{ + 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 (each_window(wp)) { + WINDOW *win = &(wp->win); + + if (!(win->_flags & _ISPAD)) { + if (parent_depth(win) == depth) { + found = TRUE; + if (adjust_window(win, ToLines, ToCols, + stolen EXTRA_ARGS) != OK) + returnCode(ERR); + } + } + } + ++depth; + } while (found); + returnCode(OK); +} + +/* + * This function reallocates NCURSES window structures, with no side-effects + * such as ungetch(). + */ +NCURSES_EXPORT(int) +resize_term(int ToLines, int ToCols) +{ + int result = OK EXTRA_ARGS; + int was_stolen; + + T((T_CALLED("resize_term(%d,%d) old(%d,%d)"), + ToLines, ToCols, + screen_lines(CURRENT_SCREEN), screen_columns(CURRENT_SCREEN))); + + if (SP == 0) { + returnCode(ERR); + } + + _nc_lock_global(curses); + + was_stolen = (screen_lines(CURRENT_SCREEN) - SP->_lines_avail); + if (is_term_resized(ToLines, ToCols)) { + int myLines = CurLines = screen_lines(CURRENT_SCREEN); + int myCols = CurCols = screen_columns(CURRENT_SCREEN); + +#ifdef TRACE + if (USE_TRACEF(TRACE_UPDATE)) { + show_window_sizes("before"); + _nc_unlock_global(tracef); + } +#endif + if (ToLines > screen_lines(CURRENT_SCREEN)) { + increase_size(myLines = ToLines, myCols, was_stolen EXTRA_ARGS); + CurLines = myLines; + CurCols = myCols; + } + + if (ToCols > screen_columns(CURRENT_SCREEN)) { + increase_size(myLines, myCols = ToCols, was_stolen EXTRA_ARGS); + CurLines = myLines; + CurCols = myCols; + } + + if (ToLines < myLines || + ToCols < myCols) { + decrease_size(ToLines, ToCols, was_stolen EXTRA_ARGS); + } + + screen_lines(CURRENT_SCREEN) = lines = ToLines; + screen_columns(CURRENT_SCREEN) = columns = ToCols; + + SP->_lines_avail = lines - was_stolen; + + if (SP->oldhash) { + FreeAndNull(SP->oldhash); + } + if (SP->newhash) { + FreeAndNull(SP->newhash); + } +#ifdef TRACE + if (USE_TRACEF(TRACE_UPDATE)) { + SET_LINES(ToLines - was_stolen); + SET_COLS(ToCols); + show_window_sizes("after"); + _nc_unlock_global(tracef); + } +#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. + */ + SET_LINES(ToLines - was_stolen); + SET_COLS(ToCols); + + _nc_unlock_global(curses); + + returnCode(result); +} /* * This function reallocates NCURSES window structures. It is invoked in @@ -51,71 +391,65 @@ MODULE_ID("$Id: resizeterm.c,v 1.7 1998/09/19 19:27:43 Alexander.V.Lukyanov Exp * Because this performs memory allocation, it should not (in general) be * invoked directly from the signal handler. */ -int +NCURSES_EXPORT(int) resizeterm(int ToLines, int ToCols) { - int stolen = screen_lines - SP->_lines_avail; - int bottom = screen_lines + SP->_topstolen - stolen; + int result = ERR; - T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"), - ToLines, ToCols, - screen_lines, screen_columns)); + T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"), + ToLines, ToCols, + screen_lines(CURRENT_SCREEN), screen_columns(CURRENT_SCREEN))); + if (SP != 0) { + result = OK; SP->_sig_winch = FALSE; - if (ToLines != screen_lines - || ToCols != screen_columns) { - WINDOWLIST *wp; - + if (is_term_resized(ToLines, ToCols)) { #if USE_SIGWINCH - ungetch(KEY_RESIZE); /* so application can know this */ - clearok(curscr, TRUE); /* screen contents are unknown */ + ripoff_t *rop; + bool slk_visible = (SP != 0 + && SP->_slk != 0 + && !(SP->_slk->hidden)); + + if (slk_visible) { + slk_clear(); + } #endif + result = resize_term(ToLines, ToCols); - 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; - } - - if (myCols == screen_columns - && ToCols != screen_columns) - myCols = ToCols; - - if (wresize(win, myLines, myCols) != OK) - returnCode(ERR); - } +#if USE_SIGWINCH + safe_ungetch(SP, KEY_RESIZE); /* so application can know this */ + clearok(curscr, TRUE); /* screen contents are unknown */ - screen_lines = lines = ToLines; - screen_columns = columns = ToCols; + /* ripped-off lines are a special case: if we did not lengthen + * them, we haven't moved them either. repaint them, too. + * + * for the rest - stdscr and other windows - the client has to + * decide which to repaint, since without panels, ncurses does + * not know which are really on top. + */ + for (each_ripoff(rop)) { + if (rop->win != stdscr + && rop->win != 0 + && rop->line < 0) { - SP->_lines_avail = lines - stolen; + if (rop->hook != _nc_slk_initialize) { + touchwin(rop->win); + wnoutrefresh(rop->win); + } + } + } - if (SP->oldhash) { FreeAndNull(SP->oldhash); } - if (SP->newhash) { FreeAndNull(SP->newhash); } - } + /* soft-keys are a special case: we _know_ how to repaint them */ + if (slk_visible) { + slk_restore(); + slk_touch(); - /* - * 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; - COLS = ToCols; + slk_refresh(); + } +#endif + } + } - returnCode(OK); + returnCode(result); }