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  * \param mask will be set to the current buttons state
  36  * \return true on success, false if an error occurred
  37  **/
  38 bool
  39 mouse_query_pointer(xcb_window_t window, int16_t *x, int16_t *y, xcb_window_t *child, uint16_t *mask)
  40 {
  41     xcb_query_pointer_cookie_t query_ptr_c;
  42     xcb_query_pointer_reply_t *query_ptr_r;
  43
  44     query_ptr_c = xcb_query_pointer_unchecked(globalconf.connection, window);
  45     query_ptr_r = xcb_query_pointer_reply(globalconf.connection, query_ptr_c, NULL);
  46
  47     if(!query_ptr_r || !query_ptr_r->same_screen)
  48         return false;
  49
  50     *x = query_ptr_r->win_x;
  51     *y = query_ptr_r->win_y;
  52
  53     if(mask)
  54         *mask = query_ptr_r->mask;
  55     if(child)
  56         *child = query_ptr_r->child;
  57
  58     p_delete(&query_ptr_r);
  59
  60     return true;
  61 }
  62
  63 /** Get the pointer position on the screen.
  64  * \param x This will be set to the Pointer-x-coordinate relative to window.
  65  * \param y This will be set to the Pointer-y-coordinate relative to window.
  66  * \param child This will be set to the window under the pointer.
  67  * \param mask This will be set to the current buttons state.
  68  * \return True on success, false if an error occurred.
  69  */
  70 static bool
  71 mouse_query_pointer_root(int16_t *x, int16_t *y, xcb_window_t *child, uint16_t *mask)
  72 {
  73     xcb_window_t root = globalconf.screen->root;
  74
  75     return mouse_query_pointer(root, x, y, child, mask);
  76 }
  77
  78 /** Set the pointer position.
  79  * \param window The destination window.
  80  * \param x X-coordinate inside window.
  81  * \param y Y-coordinate inside window.
  82  */
  83 static inline void
  84 mouse_warp_pointer(xcb_window_t window, int x, int y)
  85 {
  86     xcb_warp_pointer(globalconf.connection, XCB_NONE, window,
  87                      0, 0, 0, 0, x, y);
  88 }
  89
  90 /** Mouse library.
  91  * \param L The Lua VM state.
  92  * \return The number of elements pushed on stack.
  93  * \luastack
  94  * \lfield coords Mouse coordinates.
  95  * \lfield screen Mouse screen number.
  96  */
  97 static int
  98 luaA_mouse_index(lua_State *L)
  99 {
 100     const char *attr = luaL_checkstring(L, 2);
 101     int16_t mouse_x, mouse_y;
 102     screen_t *screen;
 103
 104     /* attr is not "screen"?! */
 105     if (A_STRNEQ(attr, "screen"))
 106         return 0;
 107
 108     if (!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, NULL))
 109         return 0;
 110
 111     screen = screen_getbycoord(mouse_x, mouse_y);
 112     lua_pushnumber(L, screen_array_indexof(&globalconf.screens, screen) + 1);
 113     return 1;
 114 }
 115
 116 /** Newindex for mouse.
 117  * \param L The Lua VM state.
 118  * \return The number of elements pushed on stack.
 119  */
 120 static int
 121 luaA_mouse_newindex(lua_State *L)
 122 {
 123     const char *attr = luaL_checkstring(L, 2);
 124     int x, y = 0;
 125     int screen;
 126
 127     if (A_STRNEQ(attr, "screen"))
 128         return 0;
 129
 130     screen = luaL_checknumber(L, 3) - 1;
 131     luaA_checkscreen(screen);
 132
 133     x = globalconf.screens.tab[screen].geometry.x;
 134     y = globalconf.screens.tab[screen].geometry.y;
 135
 136     mouse_warp_pointer(globalconf.screen->root, x, y);
 137     return 0;
 138 }
 139
 140 /** Push a table with mouse status.
 141  * \param L The Lua VM state.
 142  * \param x The x coordinate.
 143  * \param y The y coordinate.
 144  * \param mask The button mask.
 145  */
 146 int
 147 luaA_mouse_pushstatus(lua_State *L, int x, int y, uint16_t mask)
 148 {
 149     lua_createtable(L, 0, 2);
 150     lua_pushnumber(L, x);
 151     lua_setfield(L, -2, "x");
 152     lua_pushnumber(L, y);
 153     lua_setfield(L, -2, "y");
 154
 155     lua_createtable(L, 5, 0);
 156
 157     int i = 1;
 158
 159     for(uint16_t maski = XCB_BUTTON_MASK_1; maski <= XCB_BUTTON_MASK_5; maski <<= 1)
 160     {
 161         if(mask & maski)
 162             lua_pushboolean(L, true);
 163         else
 164             lua_pushboolean(L, false);
 165         lua_rawseti(L, -2, i++);
 166     }
 167     lua_setfield(L, -2, "buttons");
 168     return 1;
 169 }
 170
 171 /** Get or set the mouse coords.
 172  * \param L The Lua VM state.
 173  * \return The number of elements pushed on stack.
 174  */
 175 static int
 176 luaA_mouse_coords(lua_State *L)
 177 {
 178     uint16_t mask;
 179     int x, y;
 180     int16_t mouse_x, mouse_y;
 181
 182     if(lua_gettop(L) >= 1)
 183     {
 184         luaA_checktable(L, 1);
 185         bool ignore_enter_notify = (lua_gettop(L) == 2 && luaA_checkboolean(L, 2));
 186
 187         if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, &mask))
 188             return 0;
 189
 190         x = luaA_getopt_number(L, 1, "x", mouse_x);
 191         y = luaA_getopt_number(L, 1, "y", mouse_y);
 192
 193         if(ignore_enter_notify)
 194             client_ignore_enterleave_events();
 195
 196         mouse_warp_pointer(globalconf.screen->root, x, y);
 197
 198         if(ignore_enter_notify)
 199             client_restore_enterleave_events();
 200
 201         lua_pop(L, 1);
 202     }
 203
 204     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, &mask))
 205         return 0;
 206
 207     return luaA_mouse_pushstatus(L, mouse_x, mouse_y, mask);
 208 }
 209
 210 /** Get the client which is under the pointer.
 211  * \param L The Lua VM state.
 212  * \return The number of elements pushed on stack.
 213  * \luastack
 214  * \lreturn A client or nil.
 215  */
 216 static int
 217 luaA_mouse_object_under_pointer(lua_State *L)
 218 {
 219     int16_t mouse_x, mouse_y;
 220     xcb_window_t child;
 221
 222     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, &child, NULL))
 223         return 0;
 224
 225     drawin_t *drawin;
 226     client_t *client;
 227
 228     if((drawin = drawin_getbywin(child)))
 229         return luaA_object_push(L, drawin);
 230
 231     if((client = client_getbyframewin(child)))
 232         return luaA_object_push(globalconf.L, client);
 233
 234     return 0;
 235 }
 236
 237 const struct luaL_Reg awesome_mouse_methods[] =
 238 {
 239     { "__index", luaA_mouse_index },
 240     { "__newindex", luaA_mouse_newindex },
 241     { "coords", luaA_mouse_coords },
 242     { "object_under_pointer", luaA_mouse_object_under_pointer },
 243     { NULL, NULL }
 244 };
 245 const struct luaL_Reg awesome_mouse_meta[] =
 246 {
 247     { NULL, NULL }
 248 };
 249
 250 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80