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

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