mouse.c

   1 /*
   2  * mouse.c - mouse managing
   3  *
   4  * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "mouse.h"
  23 #include "screen.h"
  24 #include "client.h"
  25 #include "structs.h"
  26 #include "common/xutil.h"
  27
  28 /** Get the pointer position.
  29  * \param window The window to get position on.
  30  * \param x will be set to the Pointer-x-coordinate relative to window
  31  * \param y will be set to the Pointer-y-coordinate relative to window
  32  * \param child Will be set to the window under the pointer.
  33  * \param mask will be set to the current buttons state
  34  * \return true on success, false if an error occured
  35  **/
  36 bool
  37 mouse_query_pointer(xcb_window_t window, int16_t *x, int16_t *y, xcb_window_t *child, uint16_t *mask)
  38 {
  39     xcb_query_pointer_cookie_t query_ptr_c;
  40     xcb_query_pointer_reply_t *query_ptr_r;
  41
  42     query_ptr_c = xcb_query_pointer_unchecked(globalconf.connection, window);
  43     query_ptr_r = xcb_query_pointer_reply(globalconf.connection, query_ptr_c, NULL);
  44
  45     if(!query_ptr_r || !query_ptr_r->same_screen)
  46         return false;
  47
  48     *x = query_ptr_r->win_x;
  49     *y = query_ptr_r->win_y;
  50     if(mask)
  51         *mask = query_ptr_r->mask;
  52     if(child)
  53         *child = query_ptr_r->child;
  54
  55     p_delete(&query_ptr_r);
  56
  57     return true;
  58 }
  59
  60 /** Get the pointer position on the screen.
  61  * \param screen This will be set to the screen the mouse is on.
  62  * \param x This will be set to the Pointer-x-coordinate relative to window.
  63  * \param y This will be set to the Pointer-y-coordinate relative to window.
  64  * \param child This will be set to the window under the pointer.
  65  * \param mask This will be set to the current buttons state.
  66  * \return True on success, false if an error occured.
  67  */
  68 static bool
  69 mouse_query_pointer_root(screen_t **s, int16_t *x, int16_t *y, xcb_window_t *child, uint16_t *mask)
  70 {
  71     for(int screen = 0;
  72         screen < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
  73         screen++)
  74     {
  75         xcb_window_t root = xutil_screen_get(globalconf.connection, screen)->root;
  76
  77         if(mouse_query_pointer(root, x, y, child, mask))
  78         {
  79             *s = &globalconf.screens.tab[screen];
  80             return true;
  81         }
  82     }
  83     return false;
  84 }
  85
  86 /** Set the pointer position.
  87  * \param window The destination window.
  88  * \param x X-coordinate inside window.
  89  * \param y Y-coordinate inside window.
  90  */
  91 static inline void
  92 mouse_warp_pointer(xcb_window_t window, int x, int y)
  93 {
  94     xcb_warp_pointer(globalconf.connection, XCB_NONE, window,
  95                      0, 0, 0, 0, x, y );
  96 }
  97
  98 /** Mouse library.
  99  * \param L The Lua VM state.
 100  * \return The number of elements pushed on stack.
 101  * \luastack
 102  * \lfield coords Mouse coordinates.
 103  * \lfield screen Mouse screen number.
 104  */
 105 static int
 106 luaA_mouse_index(lua_State *L)
 107 {
 108     size_t len;
 109     const char *attr = luaL_checklstring(L, 2, &len);
 110     int16_t mouse_x, mouse_y;
 111     screen_t *screen;
 112
 113     switch(a_tokenize(attr, len))
 114     {
 115       case A_TK_SCREEN:
 116         if(!mouse_query_pointer_root(&screen, &mouse_x, &mouse_y, NULL, NULL))
 117             return 0;
 118
 119         screen  = screen_getbycoord(screen, mouse_x, mouse_y);
 120
 121         lua_pushnumber(L, screen_array_indexof(&globalconf.screens, screen) + 1);
 122         break;
 123       default:
 124         return 0;
 125     }
 126
 127     return 1;
 128 }
 129
 130 /** Newindex for mouse.
 131  * \param L The Lua VM state.
 132  * \return The number of elements pushed on stack.
 133  */
 134 static int
 135 luaA_mouse_newindex(lua_State *L)
 136 {
 137     size_t len;
 138     const char *attr = luaL_checklstring(L, 2, &len);
 139     int x, y = 0;
 140     xcb_window_t root;
 141     int screen, phys_screen;
 142
 143     switch(a_tokenize(attr, len))
 144     {
 145       case A_TK_SCREEN:
 146         screen = luaL_checknumber(L, 3) - 1;
 147         luaA_checkscreen(screen);
 148
 149         /* we need the physical one to get the root window */
 150         phys_screen = screen_virttophys(screen);
 151         root = xutil_screen_get(globalconf.connection, phys_screen)->root;
 152
 153         x = globalconf.screens.tab[screen].geometry.x;
 154         y = globalconf.screens.tab[screen].geometry.y;
 155
 156         mouse_warp_pointer(root, x, y);
 157         break;
 158       default:
 159         return 0;
 160     }
 161
 162     return 0;
 163 }
 164
 165 /** Push a table with mouse status.
 166  * \param L The Lua VM state.
 167  * \param x The x coordinate.
 168  * \param y The y coordinate.
 169  * \param mask The button mask.
 170  */
 171 int
 172 luaA_mouse_pushstatus(lua_State *L, int x, int y, uint16_t mask)
 173 {
 174     lua_createtable(L, 0, 2);
 175     lua_pushnumber(L, x);
 176     lua_setfield(L, -2, "x");
 177     lua_pushnumber(L, y);
 178     lua_setfield(L, -2, "y");
 179
 180     lua_createtable(L, 5, 0);
 181
 182     int i = 1;
 183
 184     for(uint16_t maski = XCB_BUTTON_MASK_1; maski <= XCB_BUTTON_MASK_5; maski <<= 1)
 185     {
 186         if(mask & maski)
 187             lua_pushboolean(L, true);
 188         else
 189             lua_pushboolean(L, false);
 190         lua_rawseti(L, -2, i++);
 191     }
 192     lua_setfield(L, -2, "buttons");
 193     return 1;
 194 }
 195
 196 /** Get or set the mouse coords.
 197  * \param L The Lua VM state.
 198  * \return The number of elements pushed on stack.
 199  * \luastack
 200  * \lparam None or a table with x and y keys as mouse coordinates.
 201  * \lreturn A table with mouse coordinates.
 202  */
 203 static int
 204 luaA_mouse_coords(lua_State *L)
 205 {
 206     uint16_t mask;
 207     int x, y;
 208     int16_t mouse_x, mouse_y;
 209     screen_t *screen;
 210
 211     if(lua_gettop(L) == 1)
 212     {
 213         xcb_window_t root;
 214
 215         luaA_checktable(L, 1);
 216
 217         if(!mouse_query_pointer_root(&screen, &mouse_x, &mouse_y, NULL, &mask))
 218             return 0;
 219
 220         x = luaA_getopt_number(L, 1, "x", mouse_x);
 221         y = luaA_getopt_number(L, 1, "y", mouse_y);
 222
 223         root = xutil_screen_get(globalconf.connection,
 224                                 screen_array_indexof(&globalconf.screens, screen))->root;
 225         mouse_warp_pointer(root, x, y);
 226         lua_pop(L, 1);
 227     }
 228
 229     if(!mouse_query_pointer_root(&screen, &mouse_x, &mouse_y, NULL, &mask))
 230         return 0;
 231
 232     return luaA_mouse_pushstatus(L, mouse_x, mouse_y, mask);
 233 }
 234
 235 /** Get the client which is under the pointer.
 236  * \param L The Lua VM state.
 237  * \return The number of elements pushed on stack.
 238  * \luastack
 239  * \lreturn A client or nil.
 240  */
 241 static int
 242 luaA_mouse_object_under_pointer(lua_State *L)
 243 {
 244     screen_t *screen;
 245     int16_t mouse_x, mouse_y;
 246     xcb_window_t child;
 247
 248     if(!mouse_query_pointer_root(&screen, &mouse_x, &mouse_y, &child, NULL))
 249         return 0;
 250
 251     wibox_t *wibox;
 252     client_t *client;
 253     if((wibox = wibox_getbywin(child)))
 254     {
 255         wibox_push(L, wibox);
 256
 257         int16_t x = mouse_x - wibox->sw.geometry.x;
 258         int16_t y = mouse_y - wibox->sw.geometry.y;
 259
 260         widget_t *widget = widget_getbycoords(wibox->sw.orientation, &wibox->widgets,
 261                                               wibox->sw.geometry.width,
 262                                               wibox->sw.geometry.height,
 263                                               &x, &y);
 264
 265         if(widget)
 266         {
 267             widget_push(L, widget);
 268             return 2;
 269         }
 270         return 1;
 271     }
 272     else if((client = client_getbywin(child)))
 273         return client_push(globalconf.L, client);
 274
 275     return 0;
 276 }
 277
 278 const struct luaL_reg awesome_mouse_methods[] =
 279 {
 280     { "__index", luaA_mouse_index },
 281     { "__newindex", luaA_mouse_newindex },
 282     { "coords", luaA_mouse_coords },
 283     { "object_under_pointer", luaA_mouse_object_under_pointer },
 284     { NULL, NULL }
 285 };
 286 const struct luaL_reg awesome_mouse_meta[] =
 287 {
 288     { NULL, NULL }
 289 };
 290
 291 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80