titlebar.c

   1 /*
   2  * titlebar.c - titlebar management
   3  *
   4  * Copyright © 2008 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 <xcb/xcb.h>
  23 #include <xcb/xcb_aux.h>
  24
  25 #include <math.h>
  26
  27 #include "titlebar.h"
  28 #include "client.h"
  29 #include "widget.h"
  30
  31 extern awesome_t globalconf;
  32
  33 DO_LUA_NEW(extern, titlebar_t, titlebar, "titlebar", titlebar_ref)
  34 DO_LUA_GC(titlebar_t, titlebar, "titlebar", titlebar_unref)
  35 DO_LUA_EQ(titlebar_t, titlebar, "titlebar")
  36
  37 /** Get a client by its titlebar.
  38  * \param titlebar The titlebar.
  39  * \return A client.
  40  */
  41 client_t *
  42 client_getbytitlebar(titlebar_t *titlebar)
  43 {
  44     client_t *c;
  45
  46     for(c = globalconf.clients; c; c = c->next)
  47         if(c->titlebar == titlebar)
  48             return c;
  49
  50     return NULL;
  51 }
  52
  53 /** Get a client by its titlebar window.
  54  * \param win The window.
  55  * \return A client.
  56  */
  57 client_t *
  58 client_getbytitlebarwin(xcb_window_t win)
  59 {
  60     client_t *c;
  61
  62     for(c = globalconf.clients; c; c = c->next)
  63         if(c->titlebar && c->titlebar->sw && c->titlebar->sw->window == win)
  64             return c;
  65
  66     return NULL;
  67 }
  68
  69 /** Draw the titlebar content.
  70  * \param c The client.
  71  */
  72 void
  73 titlebar_draw(client_t *c)
  74 {
  75     xcb_drawable_t dw = 0;
  76     draw_context_t *ctx;
  77     xcb_screen_t *s;
  78
  79     if(!c || !c->titlebar || !c->titlebar->sw || !c->titlebar->position)
  80         return;
  81
  82     s = xutil_screen_get(globalconf.connection,
  83                            c->titlebar->sw->phys_screen);
  84
  85     switch(c->titlebar->position)
  86     {
  87       case Off:
  88         return;
  89       case Right:
  90       case Left:
  91         dw = xcb_generate_id(globalconf.connection);
  92         xcb_create_pixmap(globalconf.connection, s->root_depth,
  93                           dw,
  94                           s->root,
  95                           c->titlebar->sw->geometry.height,
  96                           c->titlebar->sw->geometry.width);
  97         ctx = draw_context_new(globalconf.connection, c->titlebar->sw->phys_screen,
  98                                c->titlebar->sw->geometry.height,
  99                                c->titlebar->sw->geometry.width,
 100                                dw,
 101                                &c->titlebar->colors.fg,
 102                                &c->titlebar->colors.bg);
 103         break;
 104       default:
 105         ctx = draw_context_new(globalconf.connection, c->titlebar->sw->phys_screen,
 106                                c->titlebar->sw->geometry.width,
 107                                c->titlebar->sw->geometry.height,
 108                                c->titlebar->sw->pixmap,
 109                                &c->titlebar->colors.fg,
 110                                &c->titlebar->colors.bg);
 111         break;
 112     }
 113
 114     widget_render(c->titlebar->widgets, ctx, c->titlebar->sw->gc, c->titlebar->sw->pixmap,
 115                   c->screen, c->titlebar->position,
 116                   c->titlebar->sw->geometry.x, c->titlebar->sw->geometry.y,
 117                   c->titlebar, AWESOME_TYPE_TITLEBAR);
 118
 119     switch(c->titlebar->position)
 120     {
 121       case Left:
 122         draw_rotate(ctx, ctx->pixmap, c->titlebar->sw->pixmap,
 123                     ctx->width, ctx->height,
 124                     ctx->height, ctx->width,
 125                     - M_PI_2, 0, c->titlebar->sw->geometry.height);
 126         xcb_free_pixmap(globalconf.connection, dw);
 127         break;
 128       case Right:
 129         draw_rotate(ctx, ctx->pixmap, c->titlebar->sw->pixmap,
 130                     ctx->width, ctx->height,
 131                     ctx->height, ctx->width,
 132                     M_PI_2, c->titlebar->sw->geometry.width, 0);
 133         xcb_free_pixmap(globalconf.connection, dw);
 134       default:
 135         break;
 136     }
 137
 138     simplewindow_refresh_pixmap(c->titlebar->sw);
 139
 140     draw_context_delete(&ctx);
 141
 142     c->titlebar->need_update = false;
 143 }
 144
 145 /** Titlebar refresh function.
 146  */
 147 void
 148 titlebar_refresh(void)
 149 {
 150     client_t *c;
 151
 152     for(c = globalconf.clients; c; c = c->next)
 153         if(c->titlebar && c->titlebar->need_update)
 154             titlebar_draw(c);
 155 }
 156
 157 void
 158 titlebar_geometry_compute(client_t *c, area_t geometry, area_t *res)
 159 {
 160     int width, x_offset = 0, y_offset = 0;
 161
 162     switch(c->titlebar->position)
 163     {
 164       default:
 165         return;
 166       case Top:
 167         if(c->titlebar->width)
 168             width = MAX(1, MIN(c->titlebar->width, geometry.width - 2 * c->titlebar->border.width));
 169         else
 170             width = MAX(1, geometry.width + 2 * c->border - 2 * c->titlebar->border.width);
 171         switch(c->titlebar->align)
 172         {
 173           default:
 174             break;
 175           case AlignRight:
 176             x_offset = 2 * c->border + geometry.width - width - 2 * c->titlebar->border.width;
 177             break;
 178           case AlignCenter:
 179             x_offset = (geometry.width - width) / 2;
 180             break;
 181         }
 182         res->x = geometry.x + x_offset;
 183         res->y = geometry.y - c->titlebar->height - 2 * c->titlebar->border.width + c->border;
 184         res->width = width;
 185         res->height = c->titlebar->height;
 186         break;
 187       case Bottom:
 188         if(c->titlebar->width)
 189             width = MAX(1, MIN(c->titlebar->width, geometry.width - 2 * c->titlebar->border.width));
 190         else
 191             width = MAX(1, geometry.width + 2 * c->border - 2 * c->titlebar->border.width);
 192         switch(c->titlebar->align)
 193         {
 194           default:
 195             break;
 196           case AlignRight:
 197             x_offset = 2 * c->border + geometry.width - width - 2 * c->titlebar->border.width;
 198             break;
 199           case AlignCenter:
 200             x_offset = (geometry.width - width) / 2;
 201             break;
 202         }
 203         res->x = geometry.x + x_offset;
 204         res->y = geometry.y + geometry.height + c->border;
 205         res->width = width;
 206         res->height = c->titlebar->height;
 207         break;
 208       case Left:
 209         if(c->titlebar->width)
 210             width = MAX(1, MIN(c->titlebar->width, geometry.height - 2 * c->titlebar->border.width));
 211         else
 212             width = MAX(1, geometry.height + 2 * c->border - 2 * c->titlebar->border.width);
 213         switch(c->titlebar->align)
 214         {
 215           default:
 216             break;
 217           case AlignRight:
 218             y_offset = 2 * c->border + geometry.height - width - 2 * c->titlebar->border.width;
 219             break;
 220           case AlignCenter:
 221             y_offset = (geometry.height - width) / 2;
 222             break;
 223         }
 224         res->x = geometry.x - c->titlebar->height + c->border;
 225         res->y = geometry.y + y_offset;
 226         res->width = c->titlebar->height;
 227         res->height = width;
 228         break;
 229       case Right:
 230         if(c->titlebar->width)
 231             width = MAX(1, MIN(c->titlebar->width, geometry.height - 2 * c->titlebar->border.width));
 232         else
 233             width = MAX(1, geometry.height + 2 * c->border - 2 * c->titlebar->border.width);
 234         switch(c->titlebar->align)
 235         {
 236           default:
 237             break;
 238           case AlignRight:
 239             y_offset = 2 * c->border + geometry.height - width - 2 * c->titlebar->border.width;
 240             break;
 241           case AlignCenter:
 242             y_offset = (geometry.height - width) / 2;
 243             break;
 244         }
 245         res->x = geometry.x + geometry.width + c->border;
 246         res->y = geometry.y + y_offset;
 247         res->width = c->titlebar->height;
 248         res->height = width;
 249         break;
 250     }
 251 }
 252
 253 /** Set client titlebar position.
 254  * \param c The client.
 255  */
 256 void
 257 titlebar_init(client_t *c)
 258 {
 259     int width = 0, height = 0;
 260     area_t geom;
 261
 262     switch(c->titlebar->position)
 263     {
 264       default:
 265         c->titlebar->position = Off;
 266         return;
 267       case Top:
 268       case Bottom:
 269         if(c->titlebar->width)
 270             width = MIN(c->titlebar->width, c->geometry.width - 2 * c->titlebar->border.width);
 271         else
 272             width = c->geometry.width + 2 * c->border - 2 * c->titlebar->border.width;
 273         height = c->titlebar->height;
 274         break;
 275       case Left:
 276       case Right:
 277         if(c->titlebar->width)
 278             height = MIN(c->titlebar->width, c->geometry.height - 2 * c->titlebar->border.width);
 279         else
 280             height = c->geometry.height + 2 * c->border - 2 * c->titlebar->border.width;
 281         width = c->titlebar->height;
 282         break;
 283     }
 284
 285     titlebar_geometry_compute(c, c->geometry, &geom);
 286
 287     c->titlebar->sw = simplewindow_new(globalconf.connection, c->phys_screen, geom.x, geom.y,
 288                                        geom.width, geom.height, c->titlebar->border.width);
 289
 290     if(c->titlebar->border.width)
 291         xcb_change_window_attributes(globalconf.connection, c->titlebar->sw->window,
 292                                      XCB_CW_BORDER_PIXEL, &c->titlebar->border.color.pixel);
 293
 294     if(client_isvisible(c, c->screen))
 295         globalconf.screens[c->screen].need_arrange = true;
 296
 297     c->titlebar->need_update = true;
 298 }
 299
 300 /** Create a new titlebar.
 301  * \param L The Lua VM state.
 302  * \return The number of value pushed.
 303  *
 304  * \luastack
 305  * \lparam A table with values: align, position, fg, bg, border_width,
 306  * border_color, width and height.
 307  * \lreturn A brand new titlebar.
 308  */
 309 static int
 310 luaA_titlebar_new(lua_State *L)
 311 {
 312     titlebar_t *tb;
 313     const char *buf;
 314     size_t len;
 315
 316     luaA_checktable(L, 2);
 317
 318     tb = p_new(titlebar_t, 1);
 319
 320     buf = luaA_getopt_lstring(L, 2, "align", "left", &len);
 321     tb->align = draw_align_fromstr(buf, len);
 322
 323     tb->width = luaA_getopt_number(L, 2, "width", 0);
 324     tb->height = luaA_getopt_number(L, 2, "height", 0);
 325     if(tb->height <= 0)
 326         /* 1.5 as default factor, it fits nice but no one knows why */
 327         tb->height = 1.5 * globalconf.font->height;
 328
 329     buf = luaA_getopt_lstring(L, 2, "position", "top", &len);
 330     tb->position = position_fromstr(buf, len);
 331
 332     tb->colors.fg = globalconf.colors.fg;
 333     if((buf = luaA_getopt_lstring(L, 2, "fg", NULL, &len)))
 334         xcolor_init(&tb->colors.fg, globalconf.connection,
 335                     globalconf.default_screen, buf, len);
 336
 337     tb->colors.bg = globalconf.colors.bg;
 338     if((buf = luaA_getopt_lstring(L, 2, "bg", NULL, &len)))
 339         xcolor_init(&tb->colors.bg, globalconf.connection,
 340                     globalconf.default_screen, buf, len);
 341
 342     tb->border.color = globalconf.colors.fg;
 343     if((buf = luaA_getopt_lstring(L, 2, "border_color", NULL, &len)))
 344         xcolor_init(&tb->border.color, globalconf.connection,
 345                     globalconf.default_screen, buf, len);
 346
 347     tb->border.width = luaA_getopt_number(L, 2, "border_width", 0);
 348
 349     return luaA_titlebar_userdata_new(globalconf.L, tb);
 350 }
 351
 352 /** Titlebar newindex.
 353  * \param L The Lua VM state.
 354  * \return The number of elements pushed on stack.
 355  */
 356 static int
 357 luaA_titlebar_newindex(lua_State *L)
 358 {
 359     size_t len;
 360     titlebar_t **titlebar = luaA_checkudata(L, 1, "titlebar");
 361     const char *buf, *attr = luaL_checklstring(L, 2, &len);
 362     client_t *c = NULL, **newc;
 363     int i;
 364     widget_node_t *witer;
 365     position_t position;
 366
 367     switch(a_tokenize(attr, len))
 368     {
 369       case A_TK_CLIENT:
 370         if(!lua_isnil(L, 3))
 371             newc = luaA_checkudata(L, 3, "client");
 372         else
 373             newc = NULL;
 374
 375         if(newc)
 376         {
 377             if((*newc)->titlebar)
 378             {
 379                 simplewindow_delete(&(*newc)->titlebar->sw);
 380                 titlebar_unref(&(*newc)->titlebar);
 381                 globalconf.screens[(*newc)->screen].need_arrange = true;
 382             }
 383             /* Attach titlebar to client */
 384             (*newc)->titlebar = *titlebar;
 385             titlebar_ref(titlebar);
 386             titlebar_init(*newc);
 387             c = *newc;
 388         }
 389         else
 390         {
 391             if((c = client_getbytitlebar(*titlebar)))
 392             {
 393                 simplewindow_delete(&(*titlebar)->sw);
 394                 /* unref and NULL the ref */
 395                 titlebar_unref(&c->titlebar);
 396                 globalconf.screens[c->screen].need_arrange = true;
 397             }
 398         }
 399         break;
 400       case A_TK_ALIGN:
 401         if((buf = luaL_checklstring(L, 3, &len)))
 402             (*titlebar)->align = draw_align_fromstr(buf, len);
 403         else
 404             return 0;
 405         break;
 406       case A_TK_BORDER_WIDTH:
 407         if((i = luaL_checknumber(L, 3)) >= 0)
 408             (*titlebar)->border.width = i;
 409         else
 410             return 0;
 411         break;
 412       case A_TK_BORDER_COLOR:
 413         if((buf = luaL_checklstring(L, 3, &len)))
 414             if(xcolor_init(&(*titlebar)->border.color, globalconf.connection,
 415                            globalconf.default_screen, buf, len))
 416                 if((*titlebar)->sw)
 417                     xcb_change_window_attributes(globalconf.connection, (*titlebar)->sw->window,
 418                                                  XCB_CW_BORDER_PIXEL, &(*titlebar)->border.color.pixel);
 419         return 0;
 420       case A_TK_FG:
 421         if((buf = luaL_checklstring(L, 3, &len)))
 422             if(xcolor_init(&(*titlebar)->colors.fg, globalconf.connection,
 423                           globalconf.default_screen, buf, len))
 424                 (*titlebar)->need_update = true;
 425         return 0;
 426       case A_TK_BG:
 427         if((buf = luaL_checklstring(L, 3, &len)))
 428             if(xcolor_init(&(*titlebar)->colors.bg, globalconf.connection,
 429                            globalconf.default_screen, buf, len))
 430                 (*titlebar)->need_update = true;
 431         return 0;
 432       case A_TK_WIDGETS:
 433         luaA_checktable(L, 3);
 434
 435         /* remove all widgets */
 436         for(witer = (*titlebar)->widgets; witer; witer = (*titlebar)->widgets)
 437         {
 438             if(witer->widget->detach)
 439                 witer->widget->detach(witer->widget, *titlebar);
 440             widget_unref(&witer->widget);
 441             widget_node_list_detach(&(*titlebar)->widgets, witer);
 442             p_delete(&witer);
 443         }
 444
 445         (*titlebar)->need_update = true;
 446
 447         /* now read all widgets and add them */
 448         lua_pushnil(L);
 449         while(lua_next(L, 3))
 450         {
 451             widget_t **widget = luaA_checkudata(L, -1, "widget");
 452             widget_node_t *w = p_new(widget_node_t, 1);
 453             w->widget = *widget;
 454             widget_node_list_append(&(*titlebar)->widgets, w);
 455             widget_ref(widget);
 456             lua_pop(L, 1);
 457         }
 458         break;
 459       case A_TK_POSITION:
 460         buf = luaL_checklstring(L, 3, &len);
 461         position = position_fromstr(buf, len);
 462         if(position != (*titlebar)->position)
 463         {
 464             (*titlebar)->position = position;
 465             c = client_getbytitlebar(*titlebar);
 466             simplewindow_delete(&c->titlebar->sw);
 467             titlebar_init(c);
 468         }
 469         break;
 470       default:
 471         return 0;
 472     }
 473
 474     if((c || (c = client_getbytitlebar(*titlebar)))
 475        && client_isvisible(c, c->screen))
 476         globalconf.screens[c->screen].need_arrange = true;
 477
 478     return 0;
 479 }
 480
 481 /** Titlebar object.
 482  * \param L The Lua VM state.
 483  * \return The number of elements pushed on stack.
 484  * \luastack
 485  * \lfield client The client attached to this titlebar.
 486  * \lfield align Alignment relative to the client.
 487  * \lfield border_width Border width.
 488  * \lfield border_color Border color.
 489  * \lfield fg Foreground color.
 490  * \lfield bg Background color.
 491  * \lfield position Position.
 492  */
 493 static int
 494 luaA_titlebar_index(lua_State *L)
 495 {
 496     size_t len;
 497     titlebar_t **titlebar = luaA_checkudata(L, 1, "titlebar");
 498     const char *attr = luaL_checklstring(L, 2, &len);
 499     client_t *c;
 500     widget_node_t *witer;
 501     int i = 0;
 502
 503     if(luaA_usemetatable(L, 1, 2))
 504         return 1;
 505
 506     switch(a_tokenize(attr, len))
 507     {
 508       case A_TK_CLIENT:
 509         if((c = client_getbytitlebar(*titlebar)))
 510             return luaA_client_userdata_new(L, c);
 511         else
 512             return 0;
 513       case A_TK_ALIGN:
 514         lua_pushstring(L, draw_align_tostr((*titlebar)->align));
 515         break;
 516       case A_TK_BORDER_WIDTH:
 517         lua_pushnumber(L, (*titlebar)->border.width);
 518         break;
 519       case A_TK_BORDER_COLOR:
 520         luaA_pushcolor(L, &(*titlebar)->border.color);
 521         break;
 522       case A_TK_FG:
 523         luaA_pushcolor(L, &(*titlebar)->colors.fg);
 524         break;
 525       case A_TK_BG:
 526         luaA_pushcolor(L, &(*titlebar)->colors.bg);
 527         break;
 528       case A_TK_WIDGETS:
 529         lua_newtable(L);
 530         for(witer = (*titlebar)->widgets; witer; witer = witer->next)
 531         {
 532             luaA_widget_userdata_new(L, witer->widget);
 533             lua_rawseti(L, -2, ++i);
 534         }
 535         break;
 536       case A_TK_POSITION:
 537         lua_pushstring(L, position_tostr((*titlebar)->position));
 538         break;
 539       default:
 540         return 0;
 541     }
 542
 543     return 1;
 544 }
 545
 546 /** Convert a titlebar to a printable string.
 547  * \param L The Lua VM state.
 548  * \return The number of value pushed.
 549  *
 550  * \luastack
 551  * \lvalue A titlebar.
 552  * \lreturn A string.
 553  */
 554 static int
 555 luaA_titlebar_tostring(lua_State *L)
 556 {
 557     titlebar_t **p = luaA_checkudata(L, 1, "titlebar");
 558     lua_pushfstring(L, "[titlebar udata(%p)]", *p);
 559     return 1;
 560 }
 561
 562 const struct luaL_reg awesome_titlebar_methods[] =
 563 {
 564     { "__call", luaA_titlebar_new },
 565     { NULL, NULL }
 566 };
 567 const struct luaL_reg awesome_titlebar_meta[] =
 568 {
 569     { "__index", luaA_titlebar_index },
 570     { "__newindex", luaA_titlebar_newindex },
 571     { "__eq", luaA_titlebar_eq },
 572     { "__gc", luaA_titlebar_gc },
 573     { "__tostring", luaA_titlebar_tostring },
 574     { NULL, NULL }
 575 };
 576
 577 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80