Initial commit

1 files changed, 244 insertions, 0 deletions

diff --git a/vendor/x11iraf/xgterm/cursor.c b/vendor/x11iraf/xgterm/cursor.c
new file mode 100644
index 00000000..5fc00957
--- /dev/null
+++ b/vendor/x11iraf/xgterm/cursor.c
@@ -0,0 +1,244 @@
+/*
+ *	$XConsortium: cursor.c,v 1.14 93/09/20 17:42:23 hersh Exp $
+ */
+
+/*
+ * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+ *
+ *                         All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Digital Equipment
+ * Corporation not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior permission.
+ *
+ *
+ * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/* cursor.c */
+
+#include "ptyx.h"		/* also gets Xlib.h */
+
+static void _CheckSelection(screen)
+register TScreen *screen;
+{
+    extern XgtermWidget term;	/* %%% gross */
+
+    if (screen->cur_row > screen->endHRow ||
+	(screen->cur_row == screen->endHRow &&
+	 screen->cur_col >= screen->endHCol)) {}
+    else
+	DisownSelection(term);
+}
+
+
+
+/*
+ * Moves the cursor to the specified position, checking for bounds.
+ * (this includes scrolling regions)
+ * The origin is considered to be 0, 0 for this procedure.
+ */
+CursorSet(screen, row, col, flags)
+register TScreen	*screen;
+register int	row, col;
+unsigned	flags;
+{
+	register int maxr;
+
+	col = (col < 0 ? 0 : col);
+	screen->cur_col = (col <= screen->max_col ? col : screen->max_col);
+	maxr = screen->max_row;
+	if (flags & ORIGIN) {
+		row += screen->top_marg;
+		maxr = screen->bot_marg;
+	}
+	row = (row < 0 ? 0 : row);
+	screen->cur_row = (row <= maxr ? row : maxr);
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/*
+ * moves the cursor left n, no wrap around
+ */
+CursorBack(screen, n)
+register TScreen	*screen;
+int		n;
+{
+	register int i, j, k, rev;
+	extern XgtermWidget term;
+
+	if((rev = (term->flags & (REVERSEWRAP | WRAPAROUND)) ==
+	 (REVERSEWRAP | WRAPAROUND)) && screen->do_wrap)
+		n--;
+	if ((screen->cur_col -= n) < 0) {
+		if(rev) {
+			if((i = (j = screen->max_col + 1) * screen->cur_row +
+			 screen->cur_col) < 0) {
+				k = j * (screen->max_row + 1);
+				i += ((-i) / k + 1) * k;
+			}
+			screen->cur_row = i / j;
+			screen->cur_col = i % j;
+		} else
+			screen->cur_col = 0;
+	}
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/*
+ * moves the cursor forward n, no wraparound
+ */
+CursorForward(screen, n)
+register TScreen	*screen;
+int		n;
+{
+	screen->cur_col += n;
+	if (screen->cur_col > screen->max_col)
+		screen->cur_col = screen->max_col;
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/* 
+ * moves the cursor down n, no scrolling.
+ * Won't pass bottom margin or bottom of screen.
+ */
+CursorDown(screen, n)
+register TScreen	*screen;
+int		n;
+{
+	register int max;
+
+	max = (screen->cur_row > screen->bot_marg ?
+		screen->max_row : screen->bot_marg);
+
+	screen->cur_row += n;
+	if (screen->cur_row > max)
+		screen->cur_row = max;
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/* 
+ * moves the cursor up n, no linestarving.
+ * Won't pass top margin or top of screen.
+ */
+CursorUp(screen, n)
+register TScreen	*screen;
+int		n;
+{
+	register int min;
+
+	min = (screen->cur_row < screen->top_marg ?
+		0 : screen->top_marg);
+
+	screen->cur_row -= n;
+	if (screen->cur_row < min)
+		screen->cur_row = min;
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/* 
+ * Moves cursor down amount lines, scrolls if necessary.
+ * Won't leave scrolling region. No carriage return.
+ */
+Index(screen, amount)
+register TScreen	*screen;
+register int	amount;
+{
+	register int j;
+
+	/* 
+	 * indexing when below scrolling region is cursor down.
+	 * if cursor high enough, no scrolling necessary.
+	 */
+	if (screen->cur_row > screen->bot_marg
+	 || screen->cur_row + amount <= screen->bot_marg) {
+		CursorDown(screen, amount);
+		return;
+	}
+
+	CursorDown(screen, j = screen->bot_marg - screen->cur_row);
+	Scroll(screen, amount - j);
+}
+
+/*
+ * Moves cursor up amount lines, reverse scrolls if necessary.
+ * Won't leave scrolling region. No carriage return.
+ */
+RevIndex(screen, amount)
+register TScreen	*screen;
+register int	amount;
+{
+	/*
+	 * reverse indexing when above scrolling region is cursor up.
+	 * if cursor low enough, no reverse indexing needed
+	 */
+	if (screen->cur_row < screen->top_marg
+	 || screen->cur_row-amount >= screen->top_marg) {
+		CursorUp(screen, amount);
+		return;
+	}
+
+	RevScroll(screen, amount - (screen->cur_row - screen->top_marg));
+	CursorUp(screen, screen->cur_row - screen->top_marg);
+}
+
+/*
+ * Moves Cursor To First Column In Line
+ */
+CarriageReturn(screen)
+register TScreen *screen;
+{
+	screen->cur_col = 0;
+	screen->do_wrap = 0;
+	_CheckSelection(screen);
+}
+
+/*
+ * Save Cursor and Attributes
+ */
+CursorSave(term, sc)
+register XgtermWidget term;
+register SavedCursor *sc;
+{
+	register TScreen *screen = &term->screen;
+
+	sc->row = screen->cur_row;
+	sc->col = screen->cur_col;
+	sc->flags = term->flags;
+	sc->curgl = screen->curgl;
+	sc->curgr = screen->curgr;
+	memmove( sc->gsets, screen->gsets, sizeof(screen->gsets));
+}
+
+/*
+ * Restore Cursor and Attributes
+ */
+CursorRestore(term, sc)
+register XgtermWidget term;
+register SavedCursor *sc;
+{
+	register TScreen *screen = &term->screen;
+
+	memmove( screen->gsets, sc->gsets, sizeof(screen->gsets));
+	screen->curgl = sc->curgl;
+	screen->curgr = sc->curgr;
+	term->flags &= ~(BOLD|INVERSE|UNDERLINE|ORIGIN);
+	term->flags |= sc->flags & (BOLD|INVERSE|UNDERLINE|ORIGIN);
+	CursorSet (screen, (term->flags & ORIGIN) ? sc->row - screen->top_marg
+			   : sc->row, sc->col, term->flags);
+}