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458 lines
9.6 KiB
458 lines
9.6 KiB
/* -- win_utils.c -- */
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#include "x11vnc.h"
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#include "xinerama.h"
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#include "winattr_t.h"
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#include "cleanup.h"
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winattr_t *stack_list = NULL;
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int stack_list_len = 0;
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int stack_list_num = 0;
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Window parent_window(Window win, char **name);
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int valid_window(Window win, XWindowAttributes *attr_ret, int bequiet);
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Bool xtranslate(Window src, Window dst, int src_x, int src_y, int *dst_x,
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int *dst_y, Window *child, int bequiet);
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int get_window_size(Window win, int *x, int *y);
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void snapshot_stack_list(int free_only, double allowed_age);
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void update_stack_list(void);
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Window query_pointer(Window start);
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int pick_windowid(unsigned long *num);
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Window descend_pointer(int depth, Window start, char *name_info, int len);
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Window parent_window(Window win, char **name) {
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Window r, parent;
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Window *list;
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XErrorHandler old_handler;
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unsigned int nchild;
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int rc;
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if (name != NULL) {
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*name = NULL;
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}
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old_handler = XSetErrorHandler(trap_xerror);
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trapped_xerror = 0;
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rc = XQueryTree(dpy, win, &r, &parent, &list, &nchild);
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XSetErrorHandler(old_handler);
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if (! rc || trapped_xerror) {
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trapped_xerror = 0;
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return None;
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}
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trapped_xerror = 0;
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if (list) {
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XFree(list);
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}
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if (parent && name) {
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XFetchName(dpy, parent, name);
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}
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return parent;
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}
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/* trapping utility to check for a valid window: */
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int valid_window(Window win, XWindowAttributes *attr_ret, int bequiet) {
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XErrorHandler old_handler;
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XWindowAttributes attr, *pattr;
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int ok = 0;
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if (attr_ret == NULL) {
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pattr = &attr;
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} else {
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pattr = attr_ret;
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}
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if (win == None) {
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return 0;
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}
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old_handler = XSetErrorHandler(trap_xerror);
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trapped_xerror = 0;
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if (XGetWindowAttributes(dpy, win, pattr)) {
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ok = 1;
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}
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if (trapped_xerror && trapped_xerror_event) {
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if (! quiet && ! bequiet) {
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rfbLog("valid_window: trapped XError: %s (0x%lx)\n",
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xerror_string(trapped_xerror_event), win);
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}
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ok = 0;
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}
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XSetErrorHandler(old_handler);
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trapped_xerror = 0;
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return ok;
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}
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Bool xtranslate(Window src, Window dst, int src_x, int src_y, int *dst_x,
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int *dst_y, Window *child, int bequiet) {
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XErrorHandler old_handler;
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Bool ok = False;
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trapped_xerror = 0;
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old_handler = XSetErrorHandler(trap_xerror);
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if (XTranslateCoordinates(dpy, src, dst, src_x, src_y, dst_x,
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dst_y, child)) {
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ok = True;
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}
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if (trapped_xerror && trapped_xerror_event) {
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if (! quiet && ! bequiet) {
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rfbLog("xtranslate: trapped XError: %s (0x%lx)\n",
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xerror_string(trapped_xerror_event), src);
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}
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ok = False;
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}
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XSetErrorHandler(old_handler);
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trapped_xerror = 0;
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return ok;
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}
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int get_window_size(Window win, int *x, int *y) {
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XWindowAttributes attr;
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/* valid_window? */
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if (valid_window(win, &attr, 1)) {
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*x = attr.width;
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*y = attr.height;
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return 1;
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} else {
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return 0;
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}
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}
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/*
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* For use in the -wireframe stuff, save the stacking order of the direct
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* children of the root window. Ideally done before we send ButtonPress
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* to the X server.
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*/
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void snapshot_stack_list(int free_only, double allowed_age) {
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static double last_snap = 0.0, last_free = 0.0;
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double now;
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int num, rc, i, j;
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unsigned int ui;
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Window r, w;
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Window *list;
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if (! stack_list) {
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stack_list = (winattr_t *) malloc(256*sizeof(winattr_t));
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stack_list_num = 0;
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stack_list_len = 256;
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}
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dtime0(&now);
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if (free_only) {
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/* we really don't free it, just reset to zero windows */
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stack_list_num = 0;
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last_free = now;
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return;
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}
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if (stack_list_num && now < last_snap + allowed_age) {
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return;
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}
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stack_list_num = 0;
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last_free = now;
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X_LOCK;
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/* no need to trap error since rootwin */
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rc = XQueryTree(dpy, rootwin, &r, &w, &list, &ui);
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num = (int) ui;
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if (! rc) {
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stack_list_num = 0;
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last_free = now;
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last_snap = 0.0;
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X_UNLOCK;
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return;
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}
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last_snap = now;
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if (num > stack_list_len + blackouts) {
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int n = 2*num;
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free(stack_list);
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stack_list = (winattr_t *) malloc(n*sizeof(winattr_t));
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stack_list_len = n;
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}
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j = 0;
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for (i=0; i<num; i++) {
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stack_list[j].win = list[i];
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stack_list[j].fetched = 0;
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stack_list[j].valid = 0;
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stack_list[j].time = now;
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j++;
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}
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for (i=0; i<blackouts; i++) {
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stack_list[j].win = 0x1;
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stack_list[j].fetched = 1;
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stack_list[j].valid = 1;
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stack_list[j].x = blackr[i].x1;
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stack_list[j].y = blackr[i].y1;
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stack_list[j].width = blackr[i].x2 - blackr[i].x1;
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stack_list[j].height = blackr[i].y2 - blackr[i].y1;
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stack_list[j].time = now;
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stack_list[j].map_state = IsViewable;
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stack_list[j].rx = -1;
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stack_list[j].ry = -1;
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j++;
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if (0) fprintf(stderr, "blackr: %d %dx%d+%d+%d\n", i,
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stack_list[j-1].width, stack_list[j-1].height,
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stack_list[j-1].x, stack_list[j-1].y);
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}
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stack_list_num = num + blackouts;
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if (debug_wireframe > 1) {
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fprintf(stderr, "snapshot_stack_list: num=%d len=%d\n",
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stack_list_num, stack_list_len);
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}
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XFree(list);
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X_UNLOCK;
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}
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void update_stack_list(void) {
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int k;
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double now;
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XWindowAttributes attr;
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if (! stack_list) {
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return;
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}
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if (! stack_list_num) {
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return;
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}
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dtime0(&now);
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X_LOCK;
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for (k=0; k < stack_list_num; k++) {
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Window win = stack_list[k].win;
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if (win != None && win < 10) {
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; /* special, blackout */
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} else if (!valid_window(win, &attr, 1)) {
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stack_list[k].valid = 0;
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} else {
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stack_list[k].valid = 1;
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stack_list[k].x = attr.x;
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stack_list[k].y = attr.y;
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stack_list[k].width = attr.width;
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stack_list[k].height = attr.height;
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stack_list[k].depth = attr.depth;
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stack_list[k].class = attr.class;
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stack_list[k].backing_store = attr.backing_store;
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stack_list[k].map_state = attr.map_state;
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/* root_x, root_y not used for stack_list usage: */
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stack_list[k].rx = -1;
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stack_list[k].ry = -1;
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}
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stack_list[k].fetched = 1;
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stack_list[k].time = now;
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}
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X_UNLOCK;
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if (0) fprintf(stderr, "update_stack_list[%d]: %.4f %.4f\n", stack_list_num, now - x11vnc_start, dtime(&now));
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}
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Window query_pointer(Window start) {
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Window r, c;
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int rx, ry, wx, wy;
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unsigned int mask;
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if (start == None) {
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start = rootwin;
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}
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if (XQueryPointer(dpy, start, &r, &c, &rx, &ry, &wx, &wy, &mask)) {
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return c;
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} else {
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return None;
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}
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}
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int pick_windowid(unsigned long *num) {
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char line[512];
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int ok = 0, n = 0, msec = 10, secmax = 15;
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FILE *p;
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if (use_dpy) {
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set_env("DISPLAY", use_dpy);
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}
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if (no_external_cmds) {
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rfbLogEnable(1);
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rfbLog("cannot run external commands in -nocmds mode:\n");
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rfbLog(" \"%s\"\n", "xwininfo");
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rfbLog(" exiting.\n");
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clean_up_exit(1);
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}
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p = popen("xwininfo", "r");
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if (! p) {
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return 0;
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}
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fprintf(stderr, "\n");
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fprintf(stderr, " Please select the window for x11vnc to poll\n");
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fprintf(stderr, " by clicking the mouse in that window.\n");
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fprintf(stderr, "\n");
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while (msec * n++ < 1000 * secmax) {
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unsigned long tmp;
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char *q;
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fd_set set;
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struct timeval tv;
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if (screen && screen->clientHead) {
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/* they may be doing the pointer-pick thru vnc: */
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int nfds;
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tv.tv_sec = 0;
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tv.tv_usec = msec * 1000;
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FD_ZERO(&set);
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FD_SET(fileno(p), &set);
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nfds = select(fileno(p)+1, &set, NULL, NULL, &tv);
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if (nfds == 0 || nfds < 0) {
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/*
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* select timedout or error.
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* note this rfbPE takes about 30ms too:
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*/
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rfbPE(-1);
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XFlush(dpy);
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continue;
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}
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}
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if (fgets(line, 512, p) == NULL) {
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break;
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}
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q = strstr(line, " id: 0x");
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if (q) {
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q += 5;
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if (sscanf(q, "0x%lx ", &tmp) == 1) {
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ok = 1;
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*num = tmp;
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fprintf(stderr, " Picked: 0x%lx\n\n", tmp);
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break;
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}
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}
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}
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pclose(p);
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return ok;
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}
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Window descend_pointer(int depth, Window start, char *name_info, int len) {
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Window r, c, clast = None;
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int i, rx, ry, wx, wy;
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int written = 0, filled = 0;
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char *store = NULL;
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unsigned int m;
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static XClassHint *classhint = NULL;
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static char *nm_cache = NULL;
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static int nm_cache_len = 0;
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static Window prev_start = None;
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if (! classhint) {
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classhint = XAllocClassHint();
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}
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if (! nm_cache) {
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nm_cache = (char *) malloc(1024);
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nm_cache_len = 1024;
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nm_cache[0] = '\0';
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}
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if (name_info && nm_cache_len < len) {
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if (nm_cache) {
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free(nm_cache);
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}
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nm_cache_len = 2*len;
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nm_cache = (char *) malloc(nm_cache_len);
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}
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if (name_info) {
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if (start != None && start == prev_start) {
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store = NULL;
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strncpy(name_info, nm_cache, len);
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} else {
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store = name_info;
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name_info[0] = '\0';
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}
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}
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if (start != None) {
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c = start;
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if (name_info) {
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prev_start = start;
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}
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} else {
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c = rootwin;
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}
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for (i=0; i<depth; i++) {
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clast = c;
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if (store && ! filled) {
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char *name;
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if (XFetchName(dpy, clast, &name) && name != NULL) {
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int l = strlen(name);
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if (written + l+2 < len) {
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strcat(store, "^^");
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written += 2;
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strcat(store, name);
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written += l;
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} else {
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filled = 1;
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}
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XFree(name);
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}
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}
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if (store && classhint && ! filled) {
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classhint->res_name = NULL;
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classhint->res_class = NULL;
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if (XGetClassHint(dpy, clast, classhint)) {
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int l = 0;
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if (classhint->res_class) {
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l += strlen(classhint->res_class);
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}
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if (classhint->res_name) {
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l += strlen(classhint->res_name);
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}
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if (written + l+4 < len) {
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strcat(store, "##");
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if (classhint->res_class) {
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strcat(store,
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classhint->res_class);
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}
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strcat(store, "++");
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if (classhint->res_name) {
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strcat(store,
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classhint->res_name);
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}
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written += l+4;
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} else {
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filled = 1;
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}
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if (classhint->res_class) {
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XFree(classhint->res_class);
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}
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if (classhint->res_name) {
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XFree(classhint->res_name);
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}
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}
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}
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if (! XQueryPointer(dpy, c, &r, &c, &rx, &ry, &wx, &wy, &m)) {
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break;
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}
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if (! c) {
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break;
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}
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}
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if (start != None && name_info) {
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strncpy(nm_cache, name_info, nm_cache_len);
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}
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return clast;
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}
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