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     if(mask)
  53         *mask = query_ptr_r->mask;
  54     if(child)
  55         *child = query_ptr_r->child;
  56
  57     p_delete(&query_ptr_r);
  58
  59     return true;
  60 }
  61
  62 /** Get the pointer position on the screen.
  63  * \param x This will be set to the Pointer-x-coordinate relative to window.
  64  * \param y This will be set to the Pointer-y-coordinate relative to window.
  65  * \param child This will be set to the window under the pointer.
  66  * \param mask This will be set to the current buttons state.
  67  * \return True on success, false if an error occurred.
  68  */
  69 static bool
  70 mouse_query_pointer_root(int16_t *x, int16_t *y, xcb_window_t *child, uint16_t *mask)
  71 {
  72     xcb_window_t root = globalconf.screen->root;
  73
  74     if(mouse_query_pointer(root, x, y, child, mask))
  75     {
  76         return true;
  77     }
  78     return false;
  79 }
  80
  81 /** Set the pointer position.
  82  * \param window The destination window.
  83  * \param x X-coordinate inside window.
  84  * \param y Y-coordinate inside window.
  85  */
  86 static inline void
  87 mouse_warp_pointer(xcb_window_t window, int x, int y)
  88 {
  89     xcb_warp_pointer(globalconf.connection, XCB_NONE, window,
  90                      0, 0, 0, 0, x, y );
  91 }
  92
  93 /** Mouse library.
  94  * \param L The Lua VM state.
  95  * \return The number of elements pushed on stack.
  96  * \luastack
  97  * \lfield coords Mouse coordinates.
  98  * \lfield screen Mouse screen number.
  99  */
 100 static int
 101 luaA_mouse_index(lua_State *L)
 102 {
 103     const char *attr = luaL_checkstring(L, 2);
 104     int16_t mouse_x, mouse_y;
 105     screen_t *screen;
 106
 107     if(a_strcmp(attr, "screen") == 0)
 108     {
 109         if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, NULL))
 110             return 0;
 111
 112         screen  = screen_getbycoord(mouse_x, mouse_y);
 113
 114         lua_pushnumber(L, screen_array_indexof(&globalconf.screens, screen) + 1);
 115     } else
 116         return 0;
 117
 118     return 1;
 119 }
 120
 121 /** Newindex for mouse.
 122  * \param L The Lua VM state.
 123  * \return The number of elements pushed on stack.
 124  */
 125 static int
 126 luaA_mouse_newindex(lua_State *L)
 127 {
 128     const char *attr = luaL_checkstring(L, 2);
 129     int x, y = 0;
 130     int screen;
 131
 132     if(a_strcmp(attr, "screen") == 0)
 133     {
 134         screen = luaL_checknumber(L, 3) - 1;
 135         luaA_checkscreen(screen);
 136
 137         x = globalconf.screens.tab[screen].geometry.x;
 138         y = globalconf.screens.tab[screen].geometry.y;
 139
 140         mouse_warp_pointer(globalconf.screen->root, x, y);
 141     }
 142
 143     return 0;
 144 }
 145
 146 /** Push a table with mouse status.
 147  * \param L The Lua VM state.
 148  * \param x The x coordinate.
 149  * \param y The y coordinate.
 150  * \param mask The button mask.
 151  */
 152 int
 153 luaA_mouse_pushstatus(lua_State *L, int x, int y, uint16_t mask)
 154 {
 155     lua_createtable(L, 0, 2);
 156     lua_pushnumber(L, x);
 157     lua_setfield(L, -2, "x");
 158     lua_pushnumber(L, y);
 159     lua_setfield(L, -2, "y");
 160
 161     lua_createtable(L, 5, 0);
 162
 163     int i = 1;
 164
 165     for(uint16_t maski = XCB_BUTTON_MASK_1; maski <= XCB_BUTTON_MASK_5; maski <<= 1)
 166     {
 167         if(mask & maski)
 168             lua_pushboolean(L, true);
 169         else
 170             lua_pushboolean(L, false);
 171         lua_rawseti(L, -2, i++);
 172     }
 173     lua_setfield(L, -2, "buttons");
 174     return 1;
 175 }
 176
 177 /** Get or set the mouse coords.
 178  * \param L The Lua VM state.
 179  * \return The number of elements pushed on stack.
 180  */
 181 static int
 182 luaA_mouse_coords(lua_State *L)
 183 {
 184     uint16_t mask;
 185     int x, y;
 186     int16_t mouse_x, mouse_y;
 187
 188     if(lua_gettop(L) >= 1)
 189     {
 190         luaA_checktable(L, 1);
 191         bool ignore_enter_notify = (lua_gettop(L) == 2 && luaA_checkboolean(L, 2));
 192
 193         if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, &mask))
 194             return 0;
 195
 196         x = luaA_getopt_number(L, 1, "x", mouse_x);
 197         y = luaA_getopt_number(L, 1, "y", mouse_y);
 198
 199         if(ignore_enter_notify)
 200             client_ignore_enterleave_events();
 201
 202         mouse_warp_pointer(globalconf.screen->root, x, y);
 203
 204         if(ignore_enter_notify)
 205             client_restore_enterleave_events();
 206
 207         lua_pop(L, 1);
 208     }
 209
 210     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, NULL, &mask))
 211         return 0;
 212
 213     return luaA_mouse_pushstatus(L, mouse_x, mouse_y, mask);
 214 }
 215
 216 /** Get the client which is under the pointer.
 217  * \param L The Lua VM state.
 218  * \return The number of elements pushed on stack.
 219  * \luastack
 220  * \lreturn A client or nil.
 221  */
 222 static int
 223 luaA_mouse_object_under_pointer(lua_State *L)
 224 {
 225     int16_t mouse_x, mouse_y;
 226     xcb_window_t child;
 227
 228     if(!mouse_query_pointer_root(&mouse_x, &mouse_y, &child, NULL))
 229         return 0;
 230
 231     drawin_t *drawin;
 232     client_t *client;
 233     if((drawin = drawin_getbywin(child)))
 234     {
 235         luaA_object_push(L, drawin);
 236
 237         return 1;
 238     }
 239     else if((client = client_getbyframewin(child)))
 240         return luaA_object_push(globalconf.L, client);
 241
 242     return 0;
 243 }
 244
 245 const struct luaL_reg awesome_mouse_methods[] =
 246 {
 247     { "__index", luaA_mouse_index },
 248     { "__newindex", luaA_mouse_newindex },
 249     { "coords", luaA_mouse_coords },
 250     { "object_under_pointer", luaA_mouse_object_under_pointer },
 251     { NULL, NULL }
 252 };
 253 const struct luaL_reg awesome_mouse_meta[] =
 254 {
 255     { NULL, NULL }
 256 };
 257
 258 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80