/* Part of XPCE --- The SWI-Prolog GUI toolkit Author: Jan Wielemaker and Anjo Anjewierden E-mail: jan@swi.psy.uva.nl WWW: http://www.swi.psy.uva.nl/projects/xpce/ Copyright (c) 1985-2002, University of Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include "include.h" #include #ifdef HAVE_UNISTD_H #include #endif #ifndef FD_ZERO #include #endif #if defined(HAVE_POLL_H) #include #endif #ifdef HAVE_BSTRING_H #include #endif #define MAX_DECORATION_NESTING 4 /******************************** * EVENT DISPATCHING * ********************************/ void resetDispatch() { } static void is_pending(XtPointer ctx, int *source, XtInputId *id) { } static void is_timeout(XtPointer ctx, XtIntervalId *id) { status *p = (status *)ctx; *p = FAIL; } #ifndef FD_ZERO #define FD_ZERO(x) {(x)->fds_bits[0] = 0;} #define FD_SET(n, x) {(x)->fds_bits[0] |= 1<<(n); } #endif static int dispatch_fd = -1; status ws_dispatch(Int FD, Any timeout) { XtIntervalId tid = 0; XtInputId iid = 0; status rval = SUCCEED; int ofd = dispatch_fd; int fd = (isDefault(FD) ? dispatch_fd : isNil(FD) ? -1 : valInt(FD)); /* No context: wait for input */ /* timeout */ if ( ThePceXtAppContext == NULL ) { int ready; #ifdef HAVE_POLL int to; struct pollfd fds[1]; if ( isNil(timeout) ) { to = -1; } else if ( isDefault(timeout) ) { to = 250; } else if ( isInteger(timeout) ) { to = valInt(timeout); } else if ( instanceOfObject(timeout, ClassReal) ) { to = (int)(valReal(timeout)*1000.0); } else to = 256; fds[0].fd = fd; fds[0].events = POLLIN; ready = poll(fds, 1, to); #else struct timeval to; struct timeval *tp = &to; fd_set readfds; int setmax = 0; if ( isNil(timeout) ) { tp = NULL; } else if ( isDefault(timeout) ) { to.tv_sec = 0; to.tv_usec = 250000; } else { double v; if ( isInteger(timeout) ) v = (double)valInt(timeout)/1000.0; else if ( instanceOfObject(timeout, ClassReal) ) v = valReal(timeout); else v = 0.25; to.tv_sec = (long)v; to.tv_usec = (long)(v * 1000000.0) % 1000000; } FD_ZERO(&readfds); if ( fd >= 0 ) { FD_SET(fd, &readfds); setmax = max(setmax, fd); dispatch_fd = fd; } ready = select(setmax+1, &readfds, NULL, NULL, tp); #endif dispatch_fd = ofd; return (ready > 0 ? SUCCEED : FAIL); } /* A display: dispatch until there */ /* is input or a timeout */ if ( fd >= 0 ) { iid = XtAppAddInput(ThePceXtAppContext, fd, (XtPointer) XtInputReadMask, is_pending, NULL); dispatch_fd = fd; } if ( notNil(timeout) ) { long to = -1; if ( isInteger(timeout) ) to = valInt(timeout); else if ( instanceOfObject(timeout, ClassReal) ) to = (long)(valReal(timeout)*1000.0); if ( to > 0 ) tid = XtAppAddTimeOut(ThePceXtAppContext, to, is_timeout, (XtPointer) &rval); } DEBUG(NAME_dispatch, Cprintf("Dispatch: timeout = %s, tid = %p\n", pp(timeout), (void*)tid)); if ( pceMTTryLock(LOCK_PCE) ) { RedrawDisplayManager(TheDisplayManager()); pceMTUnlock(LOCK_PCE); } /* All callbacks must be locked! */ XtAppProcessEvent(ThePceXtAppContext, XtIMXEvent|XtIMTimer|XtIMAlternateInput); if ( tid && rval ) /* if rval = FAIL, we had a timeout */ XtRemoveTimeOut(tid); if ( iid ) XtRemoveInput(iid); dispatch_fd = ofd; considerLocStillEvent(); return rval; } static int input_on_fd(int fd) { #ifdef HAVE_POLL struct pollfd fds[1]; fds[0].fd = fd; fds[0].events = POLLIN; return poll(fds, 1, 0) != 0; #else #ifndef __WINDOWS__ if ( fd < FD_SETSIZE ) #endif { fd_set rfds; struct timeval tv; FD_ZERO(&rfds); FD_SET(fd, &rfds); tv.tv_sec = 0; tv.tv_usec = 0; return select(fd+1, &rfds, NULL, NULL, &tv) != 0; } else return 1; #endif } void ws_discard_input(const char *msg) { if ( dispatch_fd >= 0 && input_on_fd(dispatch_fd) ) { char buf[1024]; Cprintf("%s; discarding input ...", msg); if ( read(dispatch_fd, buf, sizeof(buf)) >= 0 ) Cprintf("ok\n"); else Cprintf("failed\n"); } } /******************************* * WINDOW TRANSLATIONS * *******************************/ Any ws_event_in_subwindow(EventObj ev, Any root) { DisplayObj d = getDisplayEvent(ev); DisplayWsXref r = d->ws_ref; Window src_w = XtWindow(widgetWindow(ev->window)); int dx, dy; Window child; int root_is_display; if ( isDefault(root) ) root = d; if ( (root_is_display = instanceOfObject(root, ClassDisplay)) ) { XWindowAttributes atts; int depth = MAX_DECORATION_NESTING; if ( d != root ) { errorPce(ev, NAME_notSameDisplay, root); fail; } XGetWindowAttributes(r->display_xref, XtWindow(r->shell_xref), &atts); XTranslateCoordinates(r->display_xref, src_w, atts.root, valInt(ev->x), valInt(ev->y), &dx, &dy, &child); #if 0 DEBUG(NAME_pointer, /* TEST STUFF */ ({ Window rr, cr; int rx, ry, wx, wy, mask; if ( XQueryPointer(r->display_xref, atts.root, &rr, &cr, &rx, &ry, &wx, &wy, &mask) ) { Cprintf("XTranslateCoordinates --> %d\nXQueryPointer --> %d\n", child, cr); } })); #endif while ( child != None && depth-- > 0 ) { Cell cell; for_cell(cell, d->frames) { FrameObj fr = cell->value; Widget w; if ( (w=widgetFrame(fr)) && child == XtWindow(w) ) answer(fr); } XTranslateCoordinates(r->display_xref, src_w, child, valInt(ev->x), valInt(ev->y), &dx, &dy, &child); } fail; } if ( instanceOfObject(root, ClassFrame) ) { FrameObj fr = root; PceWindow sw; XTranslateCoordinates(r->display_xref, src_w, XtWindow(widgetFrame(fr)), valInt(ev->x), valInt(ev->y), &dx, &dy, &child); if ( child != None && (sw = getMemberHashTable(WindowTable, (Any) child))) { if ( instanceOfObject(sw, ClassWindowDecorator) ) { XTranslateCoordinates(r->display_xref, src_w, child, valInt(ev->x), valInt(ev->y), &dx, &dy, &child); if ( child != None ) answer(getMemberHashTable(WindowTable, (Any) child)); } answer(sw); } } else /*if ( instanceOfObject(root, ClassWindow) )*/ { PceWindow sw = root; XTranslateCoordinates(r->display_xref, src_w, XtWindow(widgetWindow(sw)), valInt(ev->x), valInt(ev->y), &dx, &dy, &child); if ( child != None ) answer(getMemberHashTable(WindowTable, (Any) child)); } fail; } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - We would like to wait for at most 0.25 seconds to distinguish between C-x (cut) and C-xC-x (exchange-point-and-mark) commands for the emulation of the CUA mode. This isn't really ideal as it waits unconditionally without handling any messages. We inprove a bit splitting it into a couple of shorter waits. XCheckIfEvent() removes the matching event. Hence we always return FALSE, but set a flag if we find the target event. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ static int is_key_event(Display *dsp, XEvent *ev, XPointer arg) { if ( ev->xany.type == KeyPress ) { int *p = (int *)arg; *p = TRUE; } return FALSE; } static int key_waiting(DisplayObj d) { DisplayWsXref r = d->ws_ref; int waiting = FALSE; XEvent event; XCheckIfEvent(r->display_xref, &event, is_key_event, (XPointer) &waiting); return waiting; } int ws_wait_for_key(int maxwait) { msleep(maxwait); return key_waiting(CurrentDisplay(NIL)); }