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/*
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* Author: Tony Rogvall <tony@bluetail.com>
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*
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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#include "device.h"
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#define SCALE 3 /* default scaling factor for acceleration */
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#define THRESH 5 /* default threshhold for acceleration */
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static int X11_Open(MOUSEDEVICE *pmd);
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static void X11_Close(void);
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static int X11_GetButtonInfo(void);
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static void X11_GetDefaultAccel(int *pscale,int *pthresh);
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static int X11_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp);
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extern Display* x11_dpy;
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extern int x11_scr;
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extern Visual* x11_vis;
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extern Window x11_win;
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extern GC x11_gc;
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extern unsigned int x11_event_mask;
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extern int x11_setup_display();
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extern void x11_handle_event(XEvent*);
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MOUSEDEVICE mousedev = {
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X11_Open,
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X11_Close,
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X11_GetButtonInfo,
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X11_GetDefaultAccel,
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X11_Read,
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NULL
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};
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/*
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* Open up the mouse device.
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* Returns the fd if successful, or negative if unsuccessful.
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*/
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static int X11_Open(MOUSEDEVICE *pmd)
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{
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if (x11_setup_display() < 0)
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return -1;
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/* return the x11 file descriptor for select */
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return ConnectionNumber(x11_dpy);
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}
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/*
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* Close the mouse device.
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*/
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static void
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X11_Close(void)
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{
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/* nop */
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}
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/*
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* Get mouse buttons supported
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*/
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static int
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X11_GetButtonInfo(void)
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{
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return MWBUTTON_L | MWBUTTON_M | MWBUTTON_R;
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}
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/*
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* Get default mouse acceleration settings
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*/
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static void
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X11_GetDefaultAccel(int *pscale,int *pthresh)
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{
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*pscale = SCALE;
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*pthresh = THRESH;
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}
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/*
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* Attempt to read bytes from the mouse and interpret them.
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* Returns -1 on error, 0 if either no bytes were read or not enough
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* was read for a complete state, or 1 if the new state was read.
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* When a new state is read, the current buttons and x and y deltas
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* are returned. This routine does not block.
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*/
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static int
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X11_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp)
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{
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static int noevent_count = 0;
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XEvent ev;
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int events = 0;
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long mask = /* x11_event_mask | */
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#ifdef USE_EXPOSURE
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ButtonPressMask | ButtonReleaseMask | PointerMotionMask | ExposureMask;
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#else
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ButtonPressMask | ButtonReleaseMask | PointerMotionMask;
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#endif
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while (XCheckMaskEvent(x11_dpy, mask, &ev)) {
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if (ev.type == MotionNotify) {
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if (ev.xmotion.window == x11_win) {
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int button = 0;
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*dx = ev.xmotion.x;
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*dy = ev.xmotion.y;
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*dz = 0;
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if (ev.xmotion.state & Button1Mask)
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button |= MWBUTTON_L;
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if (ev.xmotion.state & Button2Mask)
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button |= MWBUTTON_M;
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if (ev.xmotion.state & Button3Mask)
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button |= MWBUTTON_R;
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*bp = button;
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events++;
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}
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}
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else if (ev.type == ButtonPress) {
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if (ev.xbutton.window == x11_win) {
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int button = 0;
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/* Get pressed button */
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if(ev.xbutton.button == 1)
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button = MWBUTTON_L;
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else if(ev.xbutton.button == 2)
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button = MWBUTTON_M;
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else if(ev.xbutton.button == 3)
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button = MWBUTTON_R;
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/* Get any other buttons that might be already held */
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if (ev.xbutton.state & Button1Mask)
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button |= MWBUTTON_L;
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if (ev.xbutton.state & Button2Mask)
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button |= MWBUTTON_M;
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if (ev.xbutton.state & Button3Mask)
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button |= MWBUTTON_R;
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/* printf("!Pressing button: 0x%x, state: 0x%x, button: 0x%x\n",
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button,ev.xbutton.state, ev.xbutton.button);*/
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*bp = button;
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*dx = ev.xbutton.x;
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*dy = ev.xbutton.y;
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*dz = 0;
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events++;
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}
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}
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else if (ev.type == ButtonRelease) {
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if (ev.xbutton.window == x11_win) {
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int button = 0;
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int released = 0;
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/* Get released button */
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if(ev.xbutton.button == 1)
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released = MWBUTTON_L;
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else if(ev.xbutton.button == 2)
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released = MWBUTTON_M;
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else if(ev.xbutton.button == 3)
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released = MWBUTTON_R;
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/* Get any other buttons that might be already held */
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if (ev.xbutton.state & Button1Mask)
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button |= MWBUTTON_L;
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if (ev.xbutton.state & Button2Mask)
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button |= MWBUTTON_M;
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if (ev.xbutton.state & Button3Mask)
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button |= MWBUTTON_R;
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/* We need to remove the released button from the button mask*/
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button &= ~released;
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/*printf("!Releasing button: 0x%x, state: 0x%x, button: 0x%x\n",
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button,ev.xbutton.state, ev.xbutton.button);*/
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*bp = button;
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*dx = ev.xbutton.x;
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*dy = ev.xbutton.y;
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*dz = 0;
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events++;
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}
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}
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else {
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x11_handle_event(&ev);
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}
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}
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if (events == 0) {
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/* after a bunch of consecutive noevent calls here
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(meaning select() says there's something to read but nothing
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is returned......), force an event read (which will
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most likely terminate the connection) */
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if (++noevent_count >= 50) {
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while(XNextEvent(x11_dpy, &ev)) {
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/* if we return, then we got an event...put it back
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so we can properly process it next time through */
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XPutBackEvent(x11_dpy, &ev);
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}
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noevent_count = 0;
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}
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return 0;
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}
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noevent_count = 0;
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return 2; /* absolute position returned*/
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}
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