rem: edge_r = WMIN(scr->totalUsableArea.x2, rect.pos.x + rect.size.width);
add: edge_r = WMIN(scr->totalUsableArea[head].x2, rect.pos.x + rect.size.width);
context: updateWindowPosition(WWindow *wwin, MoveData *data, Bool doResistance,                     Bool opaqueMove, int newMouseX, int newMouseY){    WScreen *scr = wwin->screen_ptr;    int dx, dy;			       /* how much mouse moved */    int winL, winR, winT, winB;	       /* requested new window position */    int newX, newY;		       /* actual new window position */    Bool hresist, vresist;    Bool updateIndex;    Bool attract;    hresist = False;    vresist = False;    updateIndex = False;    /* check the direction of the movement */    dx = newMouseX - data->mouseX;    dy = newMouseY - data->mouseY;    data->omouseX = data->mouseX;    data->omouseY = data->mouseY;    data->mouseX = newMouseX;    data->mouseY = newMouseY;    winL = data->calcX + dx;    winR = data->calcX + data->winWidth + dx;    winT = data->calcY + dy;    winB = data->calcY + data->winHeight + dy;    newX = data->realX;    newY = data->realY;    if (doResistance) {        int l_edge, r_edge;        int edge_l, edge_r;        int t_edge, b_edge;        int edge_t, edge_b;        int resist;        resist = WIN_RESISTANCE(wPreferences.edge_resistance);        attract = wPreferences.attract;        /* horizontal movement: check horizontal edge resistances */        if (dx || dy) {            WMRect rect;            int i;            /* window is the leftmost window: check against screen edge */            /* Add inter head resistance 1/2 (if needed) */            rect = wGetRectForHead(scr, wGetHeadForPointerLocation(scr));            l_edge = WMAX(scr->totalUsableArea.x1, rect.pos.x);            edge_l = l_edge - resist;            edge_r = WMIN(scr->totalUsableArea.x2, rect.pos.x + rect.size.width);            r_edge = edge_r + resist;            /* 1 */            if ((data->rightIndex >= 0) && (data->rightIndex <= data->count)) {                WWindow *looprw;                for (i = data->rightIndex - 1; i >= 0; i--) {                    looprw = data->rightList[i];                    if (!(data->realY > WBOTTOM(looprw)                          || (data->realY + data->winHeight) < WTOP(looprw))) {                        if (attract                            || ((data->realX < (WRIGHT(looprw) + 2)) && dx < 0)) {                            l_edge = WRIGHT(looprw) + 1;                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                        }                        break;                    }                }                if (attract) {                    for (i = data->rightIndex; i < data->count; i++) {                        looprw = data->rightList[i];                        if(!(data->realY > WBOTTOM(looprw)                             || (data->realY + data->winHeight) < WTOP(looprw))) {                            r_edge = WRIGHT(looprw) + 1;                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                            break;                        }                    }                }            }            if ((data->leftIndex >= 0) && (data->leftIndex <= data->count)) {                WWindow *looprw;                for (i = data->leftIndex - 1; i >= 0; i--) {                    looprw = data->leftList[i];                    if (!(data->realY > WBOTTOM(looprw)                          || (data->realY + data->winHeight) < WTOP(looprw))) {                        if (attract                            || (((data->realX + data->winWidth) > (WLEFT(looprw) - 1)) && dx > 0)) {                            edge_r = WLEFT(looprw);                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                        }                        break;                    }                }                if (attract)                    for (i = data->leftIndex; i < data->count; i++) {                        looprw = data->leftList[i];                        if(!(data->realY > WBOTTOM(looprw)                             || (data->realY + data->winHeight) < WTOP(looprw))) {                            edge_l = WLEFT(looprw);                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                            break;                        }                    }            }            /*             printf("%d %d\n",winL,winR);             printf("l_ %d r_ %d _l %d _r %d\n",l_edge,r_edge,edge_l,edge_r);             */            if ((winL - l_edge) < (r_edge - winL)) {                if (resist > 0) {                    if ((attract && winL <= l_edge + resist && winL >= l_edge - resist)                        || (dx < 0 && winL <= l_edge && winL >= l_edge - resist)) {                        newX = l_edge;                        hresist = True;                    }                }            } else {                if (resist > 0 && attract && winL >= r_edge - resist && winL <= r_edge + resist) {                    newX = r_edge;                    hresist = True;                }            }            if ((winR - edge_l) < (edge_r - winR)) {                if (resist > 0 && attract && winR <= edge_l + resist && winR >= edge_l - resist) {                    newX = edge_l - data->winWidth;                    hresist = True;                }            } else {                if (resist > 0) {                    if ((attract && winR >= edge_r - resist && winR <= edge_r + resist)                        || (dx > 0 && winR >= edge_r && winR <= edge_r + resist)) {                        newX = edge_r - data->winWidth;                        hresist = True;                    }                }            }            /* VeRT */            /* Add inter head resistance 2/2 (if needed) */            t_edge = WMAX(scr->totalUsableArea.y1, rect.pos.y);            edge_t = t_edge - resist;            edge_b = WMIN(scr->totalUsableArea.y2, rect.pos.y + rect.size.height);            b_edge = edge_b + resist;            if ((data->bottomIndex >= 0) && (data->bottomIndex <= data->count)) {                WWindow *looprw;                for (i = data->bottomIndex - 1; i >= 0; i--) {                    looprw = data->bottomList[i];                    if (!(data->realX > WRIGHT(looprw)                          || (data->realX + data->winWidth) < WLEFT(looprw))) {                        if (attract                            || ((data->realY < (WBOTTOM(looprw) + 2)) && dy < 0)) {                            t_edge = WBOTTOM(looprw) + 1;                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                        }                        break;                    }                }                if (attract) {                    for (i = data->bottomIndex; i < data->count; i++) {                        looprw = data->bottomList[i];                        if(!(data->realX > WRIGHT(looprw)                             || (data->realX + data->winWidth) < WLEFT(looprw))) {                            b_edge = WBOTTOM(looprw) + 1;                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                            break;                        }                    }                }            }            if ((data->topIndex >= 0) && (data->topIndex <= data->count)) {                WWindow *looprw;                for (i = data->topIndex - 1; i >= 0; i--) {                    looprw = data->topList[i];                    if (!(data->realX > WRIGHT(looprw)                          || (data->realX + data->winWidth) < WLEFT(looprw))) {                        if (attract                            || (((data->realY + data->winHeight) > (WTOP(looprw) - 1)) && dy > 0)) {                            edge_b = WTOP(looprw);                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                        }                        break;                    }                }                if (attract)                    for (i = data->topIndex; i < data->count; i++) {                        looprw = data->topList[i];                        if(!(data->realX > WRIGHT(looprw)                             || (data->realX + data->winWidth) < WLEFT(looprw))) {                            edge_t = WTOP(looprw);                            resist = WIN_RESISTANCE(wPreferences.edge_resistance);                            break;                        }                    }            }            if ((winT - t_edge) < (b_edge - winT)) {                if (resist > 0) {                    if ((attract && winT <= t_edge + resist && winT >= t_edge - resist)                        || (dy < 0 && winT <= t_edge && winT >= t_edge - resist)) {                        newY = t_edge;                        vresist = True;                    }                }            }            else {                if (resist > 0 && attract && winT >= b_edge - resist && winT <= b_edge + resist) {                    newY = b_edge;                    vresist = True;                }            }            if ((winB - edge_t) < (edge_b - winB)) {                if (resist > 0 && attract && winB <= edge_t + resist && winB >= edge_t - resist) {                    newY = edge_t - data->winHeight;                    vresist = True;                }            }            else {                if (resist > 0) {                    if ((attract && winB >= edge_b - resist && winB <= edge_b + resist)                        || (dy > 0 && winB >= edge_b && winB <= edge_b + resist)) {                        newY = edge_b - data->winHeight;                        vresist = True;                    }                }            }        }        /* END VeRT */    }    /* update window position */    data->calcX += dx;    data->calcY += dy;    if (((dx > 0 && data->calcX - data->realX > 0)         || (dx < 0 && data->calcX - data->realX < 0)) && !hresist)        newX = data->calcX;    if (((dy > 0 && data->calcY - data->realY > 0)         || (dy < 0 && data->calcY - data->realY < 0)) && !vresist)        newY = data->calcY;    if (data->realX != newX || data->realY != newY) {        if (wPreferences.move_display == WDIS_NEW            && !scr->selected_windows) {            showPosition(wwin, data->realX, data->realY);        }        if (opaqueMove) {            doWindowMove(wwin, scr->selected_windows,                         newX - wwin->frame_x,                         newY - wwin->frame_y);        } else {            /* erase frames */            drawFrames(wwin, scr->selected_windows,                       data->realX - wwin->frame_x,                       data->realY - wwin->frame_y);        }        if (!scr->selected_windows            && wPreferences.move_display == WDIS_FRAME_CENTER) {            moveGeometryDisplayCentered(scr, newX + data->winWidth/2,                                        newY + data->winHeight/2);        }        if (!opaqueMove) {            /* draw frames */            drawFrames(wwin, scr->selected_windows,                       newX - wwin->frame_x,                       newY - wwin->frame_y);        }        if (!scr->selected_windows) {            showPosition(wwin, newX, newY);        }    }    /* recalc relative window position */    if (doResistance && (data->realX != newX || data->realY != newY)) {        updateResistance(wwin, data, newX, newY);    }    data->realX = newX;    data->realY = newY;}