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/*
winnie - an experimental window system
Copyright (C) 2013 Eleni Maria Stea
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Author: Eleni Maria Stea <elene.mst@gmail.com>
*/
#ifdef WINNIE_FBDEV
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
#include "geom.h"
#include "gfx.h"
#include "mouse.h"
#include "shalloc.h"
#include "window.h"
#include "winnie.h"
#include "wm.h"
#define BN_LEFT 1
#define BN_RIGHT 2
#define BN_MIDDLE 4
static int read_mouse();
struct Mouse {
int dev_fd;
Rect bounds;
int pointer_x;
int pointer_y;
int bnstate;
};
static Mouse *mouse;
bool init_mouse()
{
if(!(mouse = (Mouse*)sh_malloc(sizeof *mouse))) {
return false;
}
get_subsys()->mouse_offset = (int)((char*)mouse - (char*)get_pool());
memset(mouse, 0, sizeof *mouse);
mouse->dev_fd = -1;
if((mouse->dev_fd = open("/dev/psaux", O_RDONLY | O_NONBLOCK)) == -1) {
fprintf(stderr, "Cannot open /dev/psaux : %s\n", strerror(errno));
return false;
}
set_mouse_bounds(get_screen_size());
return true;
}
void destroy_mouse()
{
if(mouse->dev_fd != -1) {
close(mouse->dev_fd);
mouse->dev_fd = -1;
}
sh_free(mouse);
}
bool client_open_mouse(void *smem_start, int offset)
{
mouse = (Mouse*)((unsigned char*)smem_start + offset);
return true;
}
void client_close_mouse()
{
}
void set_mouse_bounds(const Rect &rect)
{
mouse->bounds = rect;
}
int get_mouse_fd()
{
return mouse->dev_fd;
}
void process_mouse_event()
{
/* TODO:
* - read all pending events from mouse fd (use O_NONBLOCK so that
* read will return -1 when there are no more events instead of blocking).
*/
int prev_state = mouse->bnstate;
int prev_x = mouse->pointer_x;
int prev_y = mouse->pointer_y;
if(read_mouse() == -1) {
return;
}
Window *top;
if(!(top = wm->get_grab_window())) {
top = wm->get_window_at_pos(mouse->pointer_x, mouse->pointer_y);
if(top) {
wm->set_focused_window(top);
}
else {
wm->set_focused_window(0);
}
}
/* - send each pointer move and button press/release to the topmost window
* with the pointer on it.
*/
int dx = mouse->pointer_x - prev_x;
int dy = mouse->pointer_y - prev_y;
if((dx || dy) && top) {
MouseMotionFuncType motion_callback = top->get_mouse_motion_callback();
if(motion_callback) {
Rect rect = top->get_absolute_rect();
motion_callback(top, mouse->pointer_x - rect.x, mouse->pointer_y - rect.y);
}
}
MouseButtonFuncType button_callback;
if((mouse->bnstate != prev_state) && top && (button_callback = top->get_mouse_button_callback())) {
int num_bits = sizeof mouse->bnstate * CHAR_BIT;
for(int i=0; i<num_bits; i++) {
int s = (mouse->bnstate >> i) & 1;
int prev_s = (prev_state >> i) & 1;
if(s != prev_s) {
Rect rect = top->get_absolute_rect();
button_callback(top, i, s, mouse->pointer_x - rect.x, mouse->pointer_y - rect.y);
}
}
}
}
void get_pointer_pos(int *x, int *y)
{
*x = mouse->pointer_x;
*y = mouse->pointer_y;
}
int get_button_state()
{
return mouse->bnstate;
}
int get_button(int bn)
{
if(bn < 0 || bn >= 3) {
return 0;
}
return (mouse->bnstate & (1 << bn)) != 0;
}
static int read_mouse()
{
int rd;
signed char state[3] = {0, 0, 0};
if((rd = read(mouse->dev_fd, state, 3)) == -1) {
fprintf(stderr, "Unable to get mouse state : %s\n", strerror(errno));
return -1;
}
mouse->bnstate = state[0] & 7;
mouse->pointer_x += state[1];
mouse->pointer_y -= state[2];
if(mouse->pointer_x < mouse->bounds.x) {
mouse->pointer_x = mouse->bounds.x;
}
if(mouse->pointer_y < mouse->bounds.y) {
mouse->pointer_y = mouse->bounds.y;
}
if(mouse->pointer_x > mouse->bounds.x + mouse->bounds.width - 1) {
mouse->pointer_x = mouse->bounds.x + mouse->bounds.width - 1;
}
if(mouse->pointer_y > mouse->bounds.y + mouse->bounds.height - 1) {
mouse->pointer_y = mouse->bounds.y + mouse->bounds.height - 1;
}
return 0;
}
#endif // WINNIE_FBDEV
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