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Diffstat (limited to 'contrib/ncurses/ncurses/base/resizeterm.c')
-rw-r--r--contrib/ncurses/ncurses/base/resizeterm.c249
1 files changed, 214 insertions, 35 deletions
diff --git a/contrib/ncurses/ncurses/base/resizeterm.c b/contrib/ncurses/ncurses/base/resizeterm.c
index f454b20c8437..46faccb74380 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);
}
/*