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/*
* tkUnix.c --
*
* This file contains procedures that are UNIX/X-specific, and will
* probably have to be written differently for Windows or Macintosh
* platforms.
*
* Copyright © 1995 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tkInt.h"
#ifdef HAVE_XSS
# include <X11/extensions/scrnsaver.h>
# ifdef __APPLE__
/* Support for weak-linked libXss. */
# define HaveXSSLibrary() (&XScreenSaverQueryInfo != NULL)
# else
/* Other platforms always link libXss. */
# define HaveXSSLibrary() (1)
# endif
#endif
/*
*----------------------------------------------------------------------
*
* TkGetServerInfo --
*
* Given a window, this procedure returns information about the window
* server for that window. This procedure provides the guts of the "winfo
* server" command.
*
* Results:
* Sets the interpreter result.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkGetServerInfo(
Tcl_Interp *interp, /* The server information is returned in this
* interpreter's result. */
Tk_Window tkwin) /* Token for window; this selects a particular
* display and server. */
{
Tcl_SetObjResult(interp, Tcl_ObjPrintf("X%dR%d %s %d",
ProtocolVersion(Tk_Display(tkwin)),
ProtocolRevision(Tk_Display(tkwin)),
ServerVendor(Tk_Display(tkwin)),
VendorRelease(Tk_Display(tkwin))));
}
/*
*----------------------------------------------------------------------
*
* TkGetDefaultScreenName --
*
* Returns the name of the screen that Tk should use during
* initialization.
*
* Results:
* Returns the argument or a string that should not be freed by the
* caller.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
const char *
TkGetDefaultScreenName(
Tcl_Interp *interp, /* Interp used to find environment
* variables. */
const char *screenName) /* Screen name from command line, or NULL. */
{
if ((screenName == NULL) || (screenName[0] == '\0')) {
screenName = Tcl_GetVar2(interp, "env", "DISPLAY", TCL_GLOBAL_ONLY);
}
return screenName;
}
/*
*----------------------------------------------------------------------
*
* Tk_UpdatePointer --
*
* Unused function in UNIX
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
Tk_UpdatePointer(
Tk_Window tkwin, /* Window to which pointer event is reported.
* May be NULL. */
int x, int y, /* Pointer location in root coords. */
int state) /* Modifier state mask. */
{
(void)tkwin;
(void)x;
(void)y;
(void)state;
/*
* This function intentionally left blank
*/
}
/*
*----------------------------------------------------------------------
*
* TkpBuildRegionFromAlphaData --
*
* Set up a rectangle of the given region based on the supplied alpha
* data.
*
* Results:
* None
*
* Side effects:
* The region is updated, with extra pixels added to it.
*
*----------------------------------------------------------------------
*/
void
TkpBuildRegionFromAlphaData(
TkRegion region, /* Region to be updated. */
unsigned x, unsigned y, /* Where in region to update. */
unsigned width, unsigned height,
/* Size of rectangle to update. */
unsigned char *dataPtr, /* Data to read from. */
unsigned pixelStride, /* Num bytes from one piece of alpha data to
* the next in the line. */
unsigned lineStride) /* Num bytes from one line of alpha data to
* the next line. */
{
unsigned char *lineDataPtr;
unsigned int x1, y1, end;
XRectangle rect;
for (y1 = 0; y1 < height; y1++) {
lineDataPtr = dataPtr;
for (x1 = 0; x1 < width; x1 = end) {
/*
* Search for first non-transparent pixel.
*/
while ((x1 < width) && !*lineDataPtr) {
x1++;
lineDataPtr += pixelStride;
}
end = x1;
/*
* Search for first transparent pixel.
*/
while ((end < width) && *lineDataPtr) {
end++;
lineDataPtr += pixelStride;
}
if (end > x1) {
rect.x = x + x1;
rect.y = y + y1;
rect.width = end - x1;
rect.height = 1;
TkUnionRectWithRegion(&rect, region, region);
}
}
dataPtr += lineStride;
}
}
/*
*----------------------------------------------------------------------
*
* Tk_GetUserInactiveTime --
*
* Return the number of milliseconds the user was inactive.
*
* Results:
* The number of milliseconds since the user's latest interaction with
* the system on the given display, or -1 if the XScreenSaver extension
* is not supported by the client libraries or the X server
* implementation.
*
* Side effects:
* None.
*----------------------------------------------------------------------
*/
long
Tk_GetUserInactiveTime(
Display *dpy) /* The display for which to query the inactive
* time. */
{
long inactiveTime = -1;
#ifdef HAVE_XSS
int eventBase, errorBase, major, minor;
/*
* Calling XScreenSaverQueryVersion seems to be needed to prevent a crash
* on some buggy versions of XFree86.
*/
if (HaveXSSLibrary()
&& XScreenSaverQueryExtension(dpy, &eventBase, &errorBase)
&& XScreenSaverQueryVersion(dpy, &major, &minor)) {
XScreenSaverInfo *info = XScreenSaverAllocInfo();
if (info == NULL) {
/*
* We are out of memory.
*/
Tcl_Panic("Out of memory: XScreenSaverAllocInfo failed in Tk_GetUserInactiveTime");
}
if (XScreenSaverQueryInfo(dpy, DefaultRootWindow(dpy), info)) {
inactiveTime = info->idle;
}
XFree(info);
}
#endif /* HAVE_XSS */
return inactiveTime;
}
/*
*----------------------------------------------------------------------
*
* Tk_ResetUserInactiveTime --
*
* Reset the user inactivity timer
*
* Results:
* none
*
* Side effects:
* The user inactivity timer of the underlaying windowing system is reset
* to zero.
*
*----------------------------------------------------------------------
*/
void
Tk_ResetUserInactiveTime(
Display *dpy)
{
XResetScreenSaver(dpy);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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