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 "objects/client.h"
  25 #include "globalconf.h"
  26 #include "objects/drawin.h"
  27 #include "luaa.h"
  28 #include "common/xutil.h"
  29
  30 /** Get the pointer position.
  31  * \param window The window to get position on.
  32  * \param x will be set to the Pointer-x-coordinate relative to window
  33  * \param y will be set to the Pointer-y-coordinate relative to window
  34  * \param child Will be set to the window under the pointer.
  35  * \return true on success, false if an error occurred
  36  **/
  37 static bool
  38 mouse_query_pointer(xcb_window_t window, int16_t *x, int16_t *y, xcb_window_t *child)
  39 {
  40     xcb_query_pointer_cookie_t query_ptr_c;
  41     xcb_query_pointer_reply_t *query_ptr_r;
  42
  43     query_ptr_c = xcb_query_pointer_unchecked(globalconf.connection, window);
  44     query_ptr_r = xcb_query_pointer_reply(globalconf.connection, query_ptr_c, NULL);
  45
  46     if(!query_ptr_r || !query_ptr_r->same_screen)
  47         return false;
  48
  49     *x = query_ptr_r->win_x;
  50     *y = query_ptr_r->win_y;
  51
  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 x This will be set to the Pointer-x-coordinate relative to window.
  62  * \param y This will be set to the Pointer-y-coordinate relative to window.
  63  * \param child This will be set to the window under the pointer.
  64  * \param mask This will be set to the current buttons state.
  65  * \return True on success, false if an error occurred.
  66  */
  67 static inline bool
  68 mouse_query_pointer_root(int16_t *x, int16_t *y, xcb_window_t *child)
  69 {
  70     return mouse_query_pointer(globalconf.screen->root, x, y, child);
  71 }
  72
  73 /** Set the pointer position.
  74  * \param window The destination window.
  75  * \param x X-coordinate inside window.
  76  * \param y Y-coordinate inside window.
  77  */
  78 static inline void
  79 mouse_warp_pointer(xcb_window_t window, int x, int y)
  80 {
  81     xcb_warp_pointer(globalconf.connection, XCB_NONE, window,
  82                      0, 0, 0, 0, x, y);
  83 }
  84
  85 /** Mouse library.
  86  * \param L The Lua VM state.
  87  * \return The number of elements pushed on stack.
  88  * \luastack
  89  * \lfield coords Mouse coordinates.
  90  * \lfield screen Mouse screen number.
  91  */
  92 static int
  93 luaA_mouse_index(lua_State *L)
  94 {
  95     const char *attr = luaL_checkstring(L, 2);
  96     int16_t mouse_x, mouse_y;
  97     screen_t *screen;
  98
  99     /* attr is not "screen"?! */
 100     if (A_STRNEQ(attr, "screen"))
 101         return 0;
 102
 103     if (!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL))
 104         return 0;
 105
 106     screen = screen_getbycoord(mouse_x, mouse_y);
 107     lua_pushnumber(L, screen_array_indexof(&globalconf.screens, screen) + 1);
 108     return 1;
 109 }
 110
 111 /** Newindex for mouse.
 112  * \param L The Lua VM state.
 113  * \return The number of elements pushed on stack.
 114  */
 115 static int
 116 luaA_mouse_newindex(lua_State *L)
 117 {
 118     const char *attr = luaL_checkstring(L, 2);
 119     int x, y = 0;
 120     int screen;
 121
 122     if (A_STRNEQ(attr, "screen"))
 123         return 0;
 124
 125     screen = luaL_checknumber(L, 3) - 1;
 126     luaA_checkscreen(screen);
 127
 128     x = globalconf.screens.tab[screen].geometry.x;
 129     y = globalconf.screens.tab[screen].geometry.y;
 130
 131     mouse_warp_pointer(globalconf.screen->root, x, y);
 132     return 0;
 133 }
 134
 135 /** Push a table with mouse status.
 136  * \param L The Lua VM state.
 137  * \param x The x coordinate.
 138  * \param y The y coordinate.
 139  * \param mask The button mask.
 140  */
 141 int
 142 luaA_mouse_pushstatus(lua_State *L, int x, int y)
 143 {
 144     lua_createtable(L, 0, 2);
 145     lua_pushnumber(L, x);
 146     lua_setfield(L, -2, "x");
 147     lua_pushnumber(L, y);
 148     lua_setfield(L, -2, "y");
 149
 150     lua_createtable(L, 5, 0);
 151
 152     const unsigned int max_button = sizeof(globalconf.buttons_pressed) * 8;
 153     unsigned int mask = 1;
 154     for (unsigned int i = 1; i <= max_button; i++, mask <<= 1)
 155     {
 156         lua_pushboolean(L, globalconf.buttons_pressed & mask);
 157         lua_rawseti(L, -2, i);
 158     }
 159     lua_setfield(L, -2, "buttons");
 160     return 1;
 161 }
 162
 163 /** Get or set the mouse coords.
 164  * \param L The Lua VM state.
 165  * \return The number of elements pushed on stack.
 166  */
 167 static int
 168 luaA_mouse_coords(lua_State *L)
 169 {
 170     int x, y;
 171     int16_t mouse_x, mouse_y;
 172
 173     if(lua_gettop(L) >= 1)
 174     {
 175         luaA_checktable(L, 1);
 176         bool ignore_enter_notify = (lua_gettop(L) == 2 && luaA_checkboolean(L, 2));
 177
 178         if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL))
 179             return 0;
 180
 181         x = luaA_getopt_number(L, 1, "x", mouse_x);
 182         y = luaA_getopt_number(L, 1, "y", mouse_y);
 183
 184         if(ignore_enter_notify)
 185             client_ignore_enterleave_events();
 186
 187         mouse_warp_pointer(globalconf.screen->root, x, y);
 188
 189         if(ignore_enter_notify)
 190             client_restore_enterleave_events();
 191
 192         lua_pop(L, 1);
 193     }
 194
 195     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL))
 196         return 0;
 197
 198     return luaA_mouse_pushstatus(L, mouse_x, mouse_y);
 199 }
 200
 201 /** Get the client which is under the pointer.
 202  * \param L The Lua VM state.
 203  * \return The number of elements pushed on stack.
 204  * \luastack
 205  * \lreturn A client or nil.
 206  */
 207 static int
 208 luaA_mouse_object_under_pointer(lua_State *L)
 209 {
 210     int16_t mouse_x, mouse_y;
 211     xcb_window_t child;
 212
 213     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, &child))
 214         return 0;
 215
 216     drawin_t *drawin;
 217     client_t *client;
 218
 219     if((drawin = drawin_getbywin(child)))
 220         luaA_object_push(L, drawin);
 221
 222     if((client = client_getbyframewin(child)))
 223         return luaA_object_push(globalconf.L, client);
 224
 225     return 0;
 226 }
 227
 228 const struct luaL_Reg awesome_mouse_methods[] =
 229 {
 230     { "__index", luaA_mouse_index },
 231     { "__newindex", luaA_mouse_newindex },
 232     { "coords", luaA_mouse_coords },
 233     { "object_under_pointer", luaA_mouse_object_under_pointer },
 234     { NULL, NULL }
 235 };
 236 const struct luaL_Reg awesome_mouse_meta[] =
 237 {
 238     { NULL, NULL }
 239 };
 240
 241 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80