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xenocara/app/xterm/scrollbar.c

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/* $XTermId: scrollbar.c,v 1.134 2008/02/28 01:07:30 tom Exp $ */
/* $XFree86: xc/programs/xterm/scrollbar.c,v 3.48 2006/02/13 01:14:59 dickey Exp $ */
/*
* Copyright 2000-2007,2008 by Thomas E. Dickey
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*
*
* 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.
*/
#include <xterm.h>
#include <X11/Xatom.h>
#if defined(HAVE_LIB_XAW)
#include <X11/Xaw/Scrollbar.h>
#elif defined(HAVE_LIB_XAW3D)
#include <X11/Xaw3d/Scrollbar.h>
#elif defined(HAVE_LIB_NEXTAW)
#include <X11/neXtaw/Scrollbar.h>
#elif defined(HAVE_LIB_XAWPLUS)
#include <X11/XawPlus/Scrollbar.h>
#endif
#include <data.h>
#include <error.h>
#include <menu.h>
#include <xcharmouse.h>
/*
* The scrollbar's border overlaps the border of the vt100 window. If there
* is no border for the vt100, there can be no border for the scrollbar.
*/
#define SCROLLBAR_BORDER(xw) ((xw)->screen.scrollBarBorder)
#if OPT_TOOLBAR
#define ScrollBarBorder(xw) (BorderWidth(xw) ? SCROLLBAR_BORDER(xw) : 0)
#else
#define ScrollBarBorder(xw) SCROLLBAR_BORDER(xw)
#endif
/* Event handlers */
static void ScrollTextTo PROTO_XT_CALLBACK_ARGS;
static void ScrollTextUpDownBy PROTO_XT_CALLBACK_ARGS;
/* Resize the text window for a terminal screen, modifying the
* appropriate WM_SIZE_HINTS and taking advantage of bit gravity.
*/
void
DoResizeScreen(XtermWidget xw)
{
TScreen *screen = &xw->screen;
int border = 2 * xw->screen.border;
int min_wide = border + xw->screen.fullVwin.sb_info.width;
int min_high = border;
XtGeometryResult geomreqresult;
Dimension reqWidth, reqHeight, repWidth, repHeight;
#ifndef NO_ACTIVE_ICON
VTwin *saveWin = WhichVWin(screen);
/* all units here want to be in the normal font units */
WhichVWin(screen) = &screen->fullVwin;
#endif /* NO_ACTIVE_ICON */
/*
* I'm going to try to explain, as I understand it, why we
* have to do XGetWMNormalHints and XSetWMNormalHints here,
* although I can't guarantee that I've got it right.
*
* In a correctly written toolkit program, the Shell widget
* parses the user supplied geometry argument. However,
* because of the way xterm does things, the VT100 widget does
* the parsing of the geometry option, not the Shell widget.
* The result of this is that the Shell widget doesn't set the
* correct window manager hints, and doesn't know that the
* user has specified a geometry.
*
* The XtVaSetValues call below tells the Shell widget to
* change its hints. However, since it's confused about the
* hints to begin with, it doesn't get them all right when it
* does the SetValues -- it undoes some of what the VT100
* widget did when it originally set the hints.
*
* To fix this, we do the following:
*
* 1. Get the sizehints directly from the window, going around
* the (confused) shell widget.
* 2. Call XtVaSetValues to let the shell widget know which
* hints have changed. Note that this may not even be
* necessary, since we're going to right ahead after that
* and set the hints ourselves, but it's good to put it
* here anyway, so that when we finally do fix the code so
* that the Shell does the right thing with hints, we
* already have the XtVaSetValues in place.
* 3. We set the sizehints directly, this fixing up whatever
* damage was done by the Shell widget during the
* XtVaSetValues.
*
* Gross, huh?
*
* The correct fix is to redo VTRealize, VTInitialize and
* VTSetValues so that font processing happens early enough to
* give back responsibility for the size hints to the Shell.
*
* Someday, we hope to have time to do this. Someday, we hope
* to have time to completely rewrite xterm.
*/
TRACE(("DoResizeScreen\n"));
#if 1 /* ndef nothack */
/*
* NOTE: the hints and the XtVaSetValues() must match.
*/
TRACE(("%s@%d -- ", __FILE__, __LINE__));
TRACE_WM_HINTS(xw);
getXtermSizeHints(xw);
xtermSizeHints(xw, ScrollbarWidth(screen));
/* These are obsolete, but old clients may use them */
xw->hints.width = MaxCols(screen) * FontWidth(screen) + xw->hints.min_width;
xw->hints.height = MaxRows(screen) * FontHeight(screen) + xw->hints.min_height;
#endif
XSetWMNormalHints(screen->display, XtWindow(SHELL_OF(xw)), &xw->hints);
reqWidth = MaxCols(screen) * FontWidth(screen) + min_wide;
reqHeight = MaxRows(screen) * FontHeight(screen) + min_high;
TRACE(("...requesting screensize chars %dx%d, pixels %dx%d\n",
MaxRows(screen),
MaxCols(screen),
reqHeight, reqWidth));
geomreqresult = XtMakeResizeRequest((Widget) xw, reqWidth, reqHeight,
&repWidth, &repHeight);
TRACE(("scrollbar.c XtMakeResizeRequest %dx%d -> %dx%d (status %d)\n",
reqHeight, reqWidth,
repHeight, repWidth,
geomreqresult));
if (geomreqresult == XtGeometryAlmost) {
TRACE(("...almost, retry screensize %dx%d\n", repHeight, repWidth));
geomreqresult = XtMakeResizeRequest((Widget) xw, repWidth,
repHeight, NULL, NULL);
}
if (geomreqresult != XtGeometryYes) {
/* The resize wasn't successful, so we might need to adjust
our idea of how large the screen is. */
TRACE(("...still no (%d) - resize the core-class\n", geomreqresult));
xw->core.widget_class->core_class.resize((Widget) xw);
}
#if 1 /* ndef nothack */
/*
* XtMakeResizeRequest() has the undesirable side-effect of clearing
* the window manager's hints, even on a failed request. This would
* presumably be fixed if the shell did its own work.
*/
if (xw->hints.flags
&& repHeight
&& repWidth) {
xw->hints.height = repHeight;
xw->hints.width = repWidth;
TRACE_HINTS(&xw->hints);
XSetWMNormalHints(screen->display, VShellWindow, &xw->hints);
}
#endif
XSync(screen->display, False); /* synchronize */
if (XtAppPending(app_con))
xevents();
#ifndef NO_ACTIVE_ICON
WhichVWin(screen) = saveWin;
#endif /* NO_ACTIVE_ICON */
}
static XtermWidget
xtermScroller(Widget xw)
{
XtermWidget result = 0;
if (xw != 0) {
if (IsXtermWidget(xw)) {
result = (XtermWidget) xw;
} else {
/*
* This may have been the scrollbar widget. Try its parent, which
* would be the VT100 widget.
*/
result = xtermScroller(XtParent(xw));
}
}
return result;
}
static Widget
CreateScrollBar(XtermWidget xw, int x, int y, int height)
{
Widget result;
Arg args[6];
XtSetArg(args[0], XtNx, x);
XtSetArg(args[1], XtNy, y);
XtSetArg(args[2], XtNheight, height);
XtSetArg(args[3], XtNreverseVideo, xw->misc.re_verse);
XtSetArg(args[4], XtNorientation, XtorientVertical);
XtSetArg(args[5], XtNborderWidth, ScrollBarBorder(xw));
result = XtCreateWidget("scrollbar", scrollbarWidgetClass,
(Widget) xw, args, XtNumber(args));
XtAddCallback(result, XtNscrollProc, ScrollTextUpDownBy, 0);
XtAddCallback(result, XtNjumpProc, ScrollTextTo, 0);
return (result);
}
void
ScrollBarReverseVideo(Widget scrollWidget)
{
XtermWidget xw = xtermScroller(scrollWidget);
if (xw != 0) {
SbInfo *sb = &(xw->screen.fullVwin.sb_info);
Arg args[4];
Cardinal nargs = XtNumber(args);
/*
* Remember the scrollbar's original colors.
*/
if (sb->rv_cached == False) {
XtSetArg(args[0], XtNbackground, &(sb->bg));
XtSetArg(args[1], XtNforeground, &(sb->fg));
XtSetArg(args[2], XtNborderColor, &(sb->bdr));
XtSetArg(args[3], XtNborderPixmap, &(sb->bdpix));
XtGetValues(scrollWidget, args, nargs);
sb->rv_cached = True;
sb->rv_active = 0;
}
sb->rv_active = !(sb->rv_active);
XtSetArg(args[!(sb->rv_active)], XtNbackground, sb->bg);
XtSetArg(args[(sb->rv_active)], XtNforeground, sb->fg);
nargs = 2; /* don't set border_pixmap */
if (sb->bdpix == XtUnspecifiedPixmap) {
/* if not pixmap then pixel */
if (sb->rv_active) {
/* keep border visible */
XtSetArg(args[2], XtNborderColor, args[1].value);
} else {
XtSetArg(args[2], XtNborderColor, sb->bdr);
}
nargs = 3;
}
XtSetValues(scrollWidget, args, nargs);
}
}
void
ScrollBarDrawThumb(Widget scrollWidget)
{
XtermWidget xw = xtermScroller(scrollWidget);
if (xw != 0) {
TScreen *screen = &xw->screen;
int thumbTop, thumbHeight, totalHeight;
thumbTop = ROW2INX(screen, screen->savedlines);
thumbHeight = MaxRows(screen);
totalHeight = thumbHeight + screen->savedlines;
XawScrollbarSetThumb(scrollWidget,
((float) thumbTop) / totalHeight,
((float) thumbHeight) / totalHeight);
}
}
void
ResizeScrollBar(XtermWidget xw)
{
TScreen *screen = &(xw->screen);
int height = screen->fullVwin.height + screen->border * 2;
int width = screen->scrollWidget->core.width;
int ypos = -ScrollBarBorder(xw);
#ifdef SCROLLBAR_RIGHT
int xpos = ((xw->misc.useRight)
? (screen->fullVwin.fullwidth -
screen->scrollWidget->core.width -
BorderWidth(screen->scrollWidget))
: -ScrollBarBorder(xw));
#else
int xpos = -ScrollBarBorder(xw);
#endif
TRACE(("ResizeScrollBar at %d,%d %dx%d\n", ypos, xpos, height, width));
XtConfigureWidget(
screen->scrollWidget,
xpos,
ypos,
width,
height,
BorderWidth(screen->scrollWidget));
ScrollBarDrawThumb(screen->scrollWidget);
}
void
WindowScroll(XtermWidget xw, int top)
{
TScreen *screen = &(xw->screen);
int i, lines;
int scrolltop, scrollheight, refreshtop;
if (top < -screen->savedlines)
top = -screen->savedlines;
else if (top > 0)
top = 0;
if ((i = screen->topline - top) == 0) {
ScrollBarDrawThumb(screen->scrollWidget);
return;
}
if (screen->cursor_state)
HideCursor();
lines = i > 0 ? i : -i;
if (lines > MaxRows(screen))
lines = MaxRows(screen);
scrollheight = screen->max_row - lines + 1;
if (i > 0)
refreshtop = scrolltop = 0;
else {
scrolltop = lines;
refreshtop = scrollheight;
}
scrolling_copy_area(xw, scrolltop, scrollheight, -i);
screen->topline = top;
ScrollSelection(screen, i, True);
XClearArea(
screen->display,
VWindow(screen),
OriginX(screen),
OriginY(screen) + refreshtop * FontHeight(screen),
(unsigned) Width(screen),
(unsigned) lines * FontHeight(screen),
False);
ScrnRefresh(xw, refreshtop, 0, lines, MaxCols(screen), False);
ScrollBarDrawThumb(screen->scrollWidget);
}
#ifdef SCROLLBAR_RIGHT
/*
* Adjust the scrollbar position if we're asked to turn on scrollbars for the
* first time (or after resizing) after the xterm is already running. That
* makes the window grow after we've initially configured the scrollbar's
* position. (There must be a better way).
*/
void
updateRightScrollbar(XtermWidget xw)
{
TScreen *screen = &xw->screen;
if (xw->misc.useRight
&& screen->fullVwin.fullwidth < xw->core.width)
XtVaSetValues(screen->scrollWidget,
XtNx, screen->fullVwin.fullwidth - BorderWidth(screen->scrollWidget),
(XtPointer) 0);
}
#endif
void
ScrollBarOn(XtermWidget xw, int init, int doalloc)
{
TScreen *screen = &xw->screen;
int i, j, k;
if (screen->fullVwin.sb_info.width || IsIcon(screen))
return;
TRACE(("ScrollBarOn\n"));
if (init) { /* then create it only */
if (screen->scrollWidget == 0) {
/* make it a dummy size and resize later */
screen->scrollWidget = CreateScrollBar(xw,
-ScrollBarBorder(xw),
-ScrollBarBorder(xw),
5);
if (screen->scrollWidget == NULL) {
Bell(XkbBI_MinorError, 0);
}
}
} else if (!screen->scrollWidget || !XtIsRealized((Widget) xw)) {
Bell(XkbBI_MinorError, 0);
Bell(XkbBI_MinorError, 0);
} else {
if (doalloc && screen->allbuf) {
/* FIXME: this is not integrated well with Allocate */
if ((screen->allbuf =
TypeRealloc(ScrnPtr,
MAX_PTRS * (screen->max_row + 2 + screen->savelines),
screen->visbuf)) == NULL) {
SysError(ERROR_SBRALLOC);
}
screen->visbuf = &screen->allbuf[MAX_PTRS * screen->savelines];
memmove((char *) screen->visbuf, (char *) screen->allbuf,
MAX_PTRS * (screen->max_row + 2) * sizeof(char *));
for (i = k = 0; i < screen->savelines; i++) {
k += BUF_HEAD;
for (j = BUF_HEAD; j < MAX_PTRS; j++) {
if ((screen->allbuf[k++] =
TypeCallocN(Char, (unsigned) MaxCols(screen))
) == NULL)
SysError(ERROR_SBRALLOC2);
}
}
}
ResizeScrollBar(xw);
xtermAddInput(screen->scrollWidget);
XtRealizeWidget(screen->scrollWidget);
TRACE_TRANS("scrollbar", screen->scrollWidget);
screen->fullVwin.sb_info.rv_cached = False;
screen->fullVwin.sb_info.width = (screen->scrollWidget->core.width
+ BorderWidth(screen->scrollWidget));
TRACE(("setting scrollbar width %d = %d + %d\n",
screen->fullVwin.sb_info.width,
screen->scrollWidget->core.width,
BorderWidth(screen->scrollWidget)));
ScrollBarDrawThumb(screen->scrollWidget);
DoResizeScreen(xw);
#ifdef SCROLLBAR_RIGHT
updateRightScrollbar(xw);
#endif
XtMapWidget(screen->scrollWidget);
update_scrollbar();
if (screen->visbuf) {
xtermClear(xw);
Redraw();
}
}
}
void
ScrollBarOff(XtermWidget xw)
{
TScreen *screen = &xw->screen;
if (!screen->fullVwin.sb_info.width || IsIcon(screen))
return;
TRACE(("ScrollBarOff\n"));
if (XtIsRealized((Widget) xw)) {
XtUnmapWidget(screen->scrollWidget);
screen->fullVwin.sb_info.width = 0;
DoResizeScreen(xw);
update_scrollbar();
if (screen->visbuf) {
xtermClear(xw);
Redraw();
}
} else {
Bell(XkbBI_MinorError, 0);
}
}
/*
* Toggle the visibility of the scrollbars.
*/
void
ToggleScrollBar(XtermWidget xw)
{
TScreen *screen = &xw->screen;
if (IsIcon(screen)) {
Bell(XkbBI_MinorError, 0);
} else {
TRACE(("ToggleScrollBar{{\n"));
if (screen->fullVwin.sb_info.width) {
ScrollBarOff(xw);
} else {
ScrollBarOn(xw, False, False);
}
update_scrollbar();
TRACE(("...ToggleScrollBar}}\n"));
}
}
/*ARGSUSED*/
static void
ScrollTextTo(
Widget scrollbarWidget,
XtPointer client_data GCC_UNUSED,
XtPointer call_data)
{
XtermWidget xw = xtermScroller(scrollbarWidget);
if (xw != 0) {
float *topPercent = (float *) call_data;
TScreen *screen = &xw->screen;
int thumbTop; /* relative to first saved line */
int newTopLine;
/*
* screen->savedlines : Number of offscreen text lines,
* MaxRows(screen) : Number of onscreen text lines,
*/
thumbTop = (int) (*topPercent * (screen->savedlines + MaxRows(screen)));
newTopLine = thumbTop - screen->savedlines;
WindowScroll(xw, newTopLine);
}
}
/*ARGSUSED*/
static void
ScrollTextUpDownBy(
Widget scrollbarWidget,
XtPointer client_data GCC_UNUSED,
XtPointer call_data)
{
XtermWidget xw = xtermScroller(scrollbarWidget);
if (xw != 0) {
long pixels = (long) call_data;
TScreen *screen = &xw->screen;
int rowOnScreen, newTopLine;
rowOnScreen = pixels / FontHeight(screen);
if (rowOnScreen == 0) {
if (pixels < 0)
rowOnScreen = -1;
else if (pixels > 0)
rowOnScreen = 1;
}
newTopLine = ROW2INX(screen, rowOnScreen);
WindowScroll(xw, newTopLine);
}
}
/*
* assume that b is lower case and allow plural
*/
static int
specialcmplowerwiths(char *a, char *b, int *modifier)
{
char ca, cb;
*modifier = 0;
if (!a || !b)
return 0;
while (1) {
ca = char2lower(*a);
cb = *b;
if (ca != cb || ca == '\0')
break; /* if not eq else both nul */
a++, b++;
}
if (cb != '\0')
return 0;
if (ca == 's')
ca = *++a;
switch (ca) {
case '+':
case '-':
*modifier = (ca == '-' ? -1 : 1) * atoi(a + 1);
return 1;
case '\0':
return 1;
default:
return 0;
}
}
static long
params_to_pixels(TScreen * screen, String * params, Cardinal n)
{
int mult = 1;
char *s;
int modifier;
switch (n > 2 ? 2 : n) {
case 2:
s = params[1];
if (specialcmplowerwiths(s, "page", &modifier)) {
mult = (MaxRows(screen) + modifier) * FontHeight(screen);
} else if (specialcmplowerwiths(s, "halfpage", &modifier)) {
mult = ((MaxRows(screen) + modifier) * FontHeight(screen)) / 2;
} else if (specialcmplowerwiths(s, "pixel", &modifier)) {
mult = 1;
} else {
/* else assume that it is Line */
mult = FontHeight(screen);
}
mult *= atoi(params[0]);
break;
case 1:
mult = atoi(params[0]) * FontHeight(screen); /* lines */
break;
default:
mult = screen->scrolllines * FontHeight(screen);
break;
}
return mult;
}
static long
AmountToScroll(Widget xw, String * params, Cardinal nparams)
{
if (xw != 0) {
if (IsXtermWidget(xw)) {
TScreen *screen = TScreenOf((XtermWidget) xw);
if (nparams > 2
&& screen->send_mouse_pos != MOUSE_OFF)
return 0;
return params_to_pixels(screen, params, nparams);
} else {
/*
* This may have been the scrollbar widget. Try its parent, which
* would be the VT100 widget.
*/
return AmountToScroll(XtParent(xw), params, nparams);
}
}
return 0;
}
/*ARGSUSED*/
void
HandleScrollForward(
Widget xw,
XEvent * event GCC_UNUSED,
String * params,
Cardinal *nparams)
{
long amount;
if ((amount = AmountToScroll(xw, params, *nparams)) != 0) {
ScrollTextUpDownBy(xw, (XtPointer) 0, (XtPointer) amount);
}
}
/*ARGSUSED*/
void
HandleScrollBack(
Widget xw,
XEvent * event GCC_UNUSED,
String * params,
Cardinal *nparams)
{
long amount;
if ((amount = -AmountToScroll(xw, params, *nparams)) != 0) {
ScrollTextUpDownBy(xw, (XtPointer) 0, (XtPointer) amount);
}
}
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