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