git.sur5r.net Git - i3/i3/blob - src/commands.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * (c) 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <assert.h>
  15 #include <unistd.h>
  16 #include <string.h>
  17
  18 #include <xcb/xcb.h>
  19
  20 #include "util.h"
  21 #include "data.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "i3.h"
  25
  26 static bool focus_window_in_container(xcb_connection_t *connection, Container *container,
  27                 direction_t direction) {
  28         /* If this container is empty, we’re done */
  29         if (container->currently_focused == NULL)
  30                 return false;
  31
  32         Client *candidad = NULL;
  33         if (direction == D_UP)
  34                 candidad = CIRCLEQ_PREV(container->currently_focused, clients);
  35         else if (direction == D_DOWN)
  36                 candidad = CIRCLEQ_NEXT(container->currently_focused, clients);
  37         else printf("Direction not implemented!\n");
  38
  39         /* If we don’t have anything to select, we’re done */
  40         if (candidad == CIRCLEQ_END(&(container->clients)))
  41                 return false;
  42
  43         /* Set focus if we could successfully move */
  44         set_focus(connection, candidad);
  45
  46         return true;
  47 }
  48
  49 static void focus_window(xcb_connection_t *connection, direction_t direction) {
  50         printf("focusing direction %d\n", direction);
  51         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  52         if (direction == D_UP || direction == D_DOWN) {
  53                 /* Let’s see if we can perform up/down focus in the current container */
  54                 Container *container = CUR_CELL;
  55
  56                 /* There always is a container. If not, current_col or current_row is wrong */
  57                 assert(container != NULL);
  58
  59                 if (focus_window_in_container(connection, container, direction))
  60                         return;
  61         } else if (direction == D_LEFT || direction == D_RIGHT) {
  62                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
  63                         current_col++;
  64                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row))
  65                         current_col--;
  66                 else {
  67                         printf("nah, not possible\n");
  68                         return;
  69                 }
  70                 if (CUR_CELL->currently_focused != NULL) {
  71                         xcb_set_input_focus(connection, XCB_INPUT_FOCUS_POINTER_ROOT,
  72                                         CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
  73                         render_layout(connection);
  74                 }
  75
  76         } else {
  77                 printf("direction unhandled\n");
  78         }
  79 }
  80
  81 /*
  82  * Tries to move the window inside its current container.
  83  *
  84  * Returns true if the window could be moved, false otherwise.
  85  *
  86  */
  87 static bool move_current_window_in_container(xcb_connection_t *connection, Client *client,
  88                 direction_t direction) {
  89         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
  90                                                 CIRCLEQ_NEXT(client, clients));
  91
  92         if (other == CIRCLEQ_END(&(client->container->clients)))
  93                 return false;
  94
  95         printf("i can do that\n");
  96         /* We can move the client inside its current container */
  97         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
  98         if (direction == D_UP)
  99                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 100         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 101         render_layout(connection);
 102         return true;
 103 }
 104
 105 /*
 106  * Moves the current window to the given direction, creating a column/row if
 107  * necessary
 108  *
 109  */
 110 static void move_current_window(xcb_connection_t *connection, direction_t direction) {
 111         printf("moving window to direction %d\n", direction);
 112         /* Get current window */
 113         Container *container = CUR_CELL,
 114                   *new = NULL;
 115
 116         /* There has to be a container, see focus_window() */
 117         assert(container != NULL);
 118
 119         /* If there is no window, we’re done */
 120         if (container->currently_focused == NULL)
 121                 return;
 122
 123         /* As soon as the client is moved away, the next client in the old
 124          * container needs to get focus, if any. Therefore, we save it here. */
 125         Client *current_client = container->currently_focused;
 126         Client *to_focus = CIRCLEQ_NEXT(current_client, clients);
 127         if (to_focus == CIRCLEQ_END(&(container->clients)))
 128                 to_focus = NULL;
 129
 130         switch (direction) {
 131                 case D_LEFT:
 132                         if (current_col == 0)
 133                                 return;
 134
 135                         new = CUR_TABLE[--current_col][current_row];
 136                         break;
 137                 case D_RIGHT:
 138                         if (current_col == (c_ws->cols-1))
 139                                 expand_table_cols(c_ws);
 140
 141                         new = CUR_TABLE[++current_col][current_row];
 142                         break;
 143                 case D_UP:
 144                         /* TODO: if we’re at the up-most position, move the rest of the table down */
 145                         if (move_current_window_in_container(connection, current_client, D_UP) ||
 146                                 current_row == 0)
 147                                 return;
 148
 149                         new = CUR_TABLE[current_col][--current_row];
 150                         break;
 151                 case D_DOWN:
 152                         if (move_current_window_in_container(connection, current_client, D_DOWN))
 153                                 return;
 154
 155                         if (current_row == (c_ws->rows-1))
 156                                 expand_table_rows(c_ws);
 157
 158                         new = CUR_TABLE[current_col][++current_row];
 159                         break;
 160         }
 161
 162         /* Remove it from the old container and put it into the new one */
 163         CIRCLEQ_REMOVE(&(container->clients), current_client, clients);
 164         CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 165
 166         /* Update data structures */
 167         current_client->container = new;
 168         container->currently_focused = to_focus;
 169         new->currently_focused = current_client;
 170
 171         /* TODO: delete all empty columns/rows */
 172
 173         render_layout(connection);
 174 }
 175
 176 /*
 177  * "Snaps" the current container (not possible for windows, because it works at table base)
 178  * to the given direction, that is, adjusts cellspan/rowspan
 179  *
 180  */
 181 static void snap_current_container(xcb_connection_t *connection, direction_t direction) {
 182         printf("snapping container to direction %d\n", direction);
 183
 184         Container *container = CUR_CELL;
 185         int i;
 186
 187         assert(container != NULL);
 188
 189         switch (direction) {
 190                 case D_LEFT:
 191                         /* Snap to the left is actually a move to the left and then a snap right */
 192                         move_current_window(connection, D_LEFT);
 193                         snap_current_container(connection, D_RIGHT);
 194                         return;
 195                 case D_RIGHT:
 196                         /* Check if the cell is used */
 197                         if (!cell_exists(container->col + 1, container->row) ||
 198                                 CUR_TABLE[container->col+1][container->row]->currently_focused != NULL) {
 199                                 printf("cannot snap to right - the cell is already used\n");
 200                                 return;
 201                         }
 202
 203                         /* Check if there are other cells with rowspan, which are in our way.
 204                          * If so, reduce their rowspan. */
 205                         for (i = container->row-1; i >= 0; i--) {
 206                                 printf("we got cell %d, %d with rowspan %d\n",
 207                                                 container->col+1, i, CUR_TABLE[container->col+1][i]->rowspan);
 208                                 while ((CUR_TABLE[container->col+1][i]->rowspan-1) >= (container->row - i))
 209                                         CUR_TABLE[container->col+1][i]->rowspan--;
 210                                 printf("new rowspan = %d\n", CUR_TABLE[container->col+1][i]->rowspan);
 211                         }
 212
 213                         container->colspan++;
 214                         break;
 215                 case D_UP:
 216                         move_current_window(connection, D_UP);
 217                         snap_current_container(connection, D_DOWN);
 218                         return;
 219                 case D_DOWN:
 220                         printf("snapping down\n");
 221                         if (!cell_exists(container->col, container->row+1) ||
 222                                 CUR_TABLE[container->col][container->row+1]->currently_focused != NULL) {
 223                                 printf("cannot snap down - the cell is already used\n");
 224                                 return;
 225                         }
 226
 227                         for (i = container->col-1; i >= 0; i--) {
 228                                 printf("we got cell %d, %d with colspan %d\n",
 229                                                 i, container->row+1, CUR_TABLE[i][container->row+1]->colspan);
 230                                 while ((CUR_TABLE[i][container->row+1]->colspan-1) >= (container->col - i))
 231                                         CUR_TABLE[i][container->row+1]->colspan--;
 232                                 printf("new colspan = %d\n", CUR_TABLE[i][container->row+1]->colspan);
 233
 234                         }
 235
 236                         container->rowspan++;
 237                         break;
 238         }
 239
 240         render_layout(connection);
 241 }
 242
 243 static void show_workspace(xcb_connection_t *conn, int workspace) {
 244         int cols, rows;
 245         Client *client;
 246         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 247         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 248         Workspace *t_ws = &(workspaces[workspace-1]);
 249
 250         printf("show_workspace(%d)\n", workspace);
 251
 252         /* Store current_row/current_col */
 253         c_ws->current_row = current_row;
 254         c_ws->current_col = current_col;
 255
 256         /* Check if the workspace has not been used yet */
 257         if (t_ws->screen == NULL) {
 258                 printf("initializing new workspace, setting num to %d\n", workspace);
 259                 t_ws->screen = c_ws->screen;
 260                 /* Copy the dimensions from the virtual screen */
 261                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 262         }
 263
 264         if (c_ws->screen != t_ws->screen) {
 265                 /* We need to switch to the other screen first */
 266                 printf("Just moving over to other screen.\n");
 267                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 268                 current_col = c_ws->current_col;
 269                 current_row = c_ws->current_row;
 270                 if (CUR_CELL->currently_focused != NULL)
 271                         warp_pointer_into(conn, CUR_CELL->currently_focused);
 272                 else {
 273                         Rect *dims = &(c_ws->screen->rect);
 274                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 275                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 276                 }
 277         }
 278
 279         /* Check if we need to change something or if we’re already there */
 280         if (c_ws->screen->current_workspace == (workspace-1))
 281                 return;
 282
 283         t_ws->screen->current_workspace = workspace-1;
 284
 285         /* TODO: does grabbing the server actually bring us any (speed)advantages? */
 286         //xcb_grab_server(conn);
 287
 288         /* Unmap all clients of the current workspace */
 289         for (cols = 0; cols < c_ws->cols; cols++)
 290                 for (rows = 0; rows < c_ws->rows; rows++) {
 291                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 292                                 xcb_unmap_window(conn, client->frame);
 293                 }
 294
 295         c_ws = &workspaces[workspace-1];
 296         current_row = c_ws->current_row;
 297         current_col = c_ws->current_col;
 298         printf("new current row = %d, current col = %d\n", current_row, current_col);
 299
 300         /* Map all clients on the new workspace */
 301         for (cols = 0; cols < c_ws->cols; cols++)
 302                 for (rows = 0; rows < c_ws->rows; rows++) {
 303                         CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 304                                 xcb_map_window(conn, client->frame);
 305                 }
 306
 307         /* Restore focus on the new workspace */
 308         if (CUR_CELL->currently_focused != NULL)
 309                 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
 310         else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 311
 312         //xcb_ungrab_server(conn);
 313
 314         render_layout(conn);
 315 }
 316
 317 /*
 318  * Parses a command, see file CMDMODE for more information
 319  *
 320  */
 321 void parse_command(xcb_connection_t *conn, const char *command) {
 322         printf("--- parsing command \"%s\" ---\n", command);
 323         /* Hmm, just to be sure */
 324         if (command[0] == '\0')
 325                 return;
 326
 327         /* Is it an <exec>? */
 328         if (strncmp(command, "exec ", strlen("exec ")) == 0) {
 329                 printf("starting \"%s\"\n", command + strlen("exec "));
 330                 start_application(command+strlen("exec "));
 331                 return;
 332         }
 333
 334         /* Is it 'f' for fullscreen? */
 335         if (command[0] == 'f') {
 336                 if (CUR_CELL->currently_focused == NULL)
 337                         return;
 338                 toggle_fullscreen(conn, CUR_CELL->currently_focused);
 339                 return;
 340         }
 341
 342         /* Is it a <with>? */
 343         if (command[0] == 'w') {
 344                 /* TODO: implement */
 345                 printf("not yet implemented.\n");
 346                 return;
 347         }
 348
 349         /* It's a normal <cmd> */
 350         int times;
 351         char *rest = NULL;
 352         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 353         direction_t direction;
 354         times = strtol(command, &rest, 10);
 355         if (rest == NULL) {
 356                 printf("Invalid command (\"%s\")\n", command);
 357                 return;
 358         }
 359         if (*rest == 'm' || *rest == 's') {
 360                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 361                 rest++;
 362         }
 363
 364         if (*rest == '\0') {
 365                 /* No rest? This was a tag number, not a times specification */
 366                 show_workspace(conn, times);
 367                 return;
 368         }
 369
 370         /* Now perform action to <where> */
 371         while (*rest != '\0') {
 372                 if (*rest == 'h')
 373                         direction = D_LEFT;
 374                 else if (*rest == 'j')
 375                         direction = D_DOWN;
 376                 else if (*rest == 'k')
 377                         direction = D_UP;
 378                 else if (*rest == 'l')
 379                         direction = D_RIGHT;
 380                 else {
 381                         printf("unknown direction: %c\n", *rest);
 382                         return;
 383                 }
 384
 385                 if (action == ACTION_FOCUS)
 386                         focus_window(conn, direction);
 387                 else if (action == ACTION_MOVE)
 388                         move_current_window(conn, direction);
 389                 else if (action == ACTION_SNAP)
 390                         snap_current_container(conn, direction);
 391
 392                 rest++;
 393         }
 394
 395         printf("--- done ---\n");
 396 }