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

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * table.c: Functions/macros for easy modifying/accessing of _the_ table (defining our
  11  *          layout).
  12  *
  13  */
  14 #include <stdio.h>
  15 #include <assert.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <sys/types.h>
  19 #include <unistd.h>
  20 #include <stdbool.h>
  21 #include <assert.h>
  22
  23 #include "data.h"
  24 #include "table.h"
  25 #include "util.h"
  26 #include "i3.h"
  27
  28 int current_workspace = 0;
  29 Workspace workspaces[10];
  30 /* Convenience pointer to the current workspace */
  31 Workspace *c_ws = &workspaces[0];
  32 int current_col = 0;
  33 int current_row = 0;
  34
  35 /*
  36  * Initialize table
  37  *
  38  */
  39 void init_table() {
  40         memset(workspaces, 0, sizeof(workspaces));
  41
  42         for (int i = 0; i < 10; i++) {
  43                 workspaces[i].screen = NULL;
  44                 workspaces[i].num = i;
  45                 SLIST_INIT(&(workspaces[i].dock_clients));
  46                 expand_table_cols(&(workspaces[i]));
  47                 expand_table_rows(&(workspaces[i]));
  48         }
  49 }
  50
  51 static void new_container(Workspace *workspace, Container **container, int col, int row) {
  52         Container *new;
  53         new = *container = calloc(sizeof(Container), 1);
  54         CIRCLEQ_INIT(&(new->clients));
  55         new->colspan = 1;
  56         new->rowspan = 1;
  57         new->col = col;
  58         new->row = row;
  59         new->workspace = workspace;
  60 }
  61
  62 /*
  63  * Add one row to the table
  64  *
  65  */
  66 void expand_table_rows(Workspace *workspace) {
  67         workspace->rows++;
  68
  69         for (int c = 0; c < workspace->cols; c++) {
  70                 workspace->table[c] = realloc(workspace->table[c], sizeof(Container*) * workspace->rows);
  71                 new_container(workspace, &(workspace->table[c][workspace->rows-1]), c, workspace->rows-1);
  72         }
  73 }
  74
  75 /*
  76  * Add one column to the table
  77  *
  78  */
  79 void expand_table_cols(Workspace *workspace) {
  80         workspace->cols++;
  81
  82         workspace->table = realloc(workspace->table, sizeof(Container**) * workspace->cols);
  83         workspace->table[workspace->cols-1] = calloc(sizeof(Container*) * workspace->rows, 1);
  84         for (int c = 0; c < workspace->rows; c++)
  85                 new_container(workspace, &(workspace->table[workspace->cols-1][c]), workspace->cols-1, c);
  86 }
  87
  88 /*
  89  * Inserts one column at the table’s head
  90  *
  91  */
  92 void expand_table_cols_at_head(Workspace *workspace) {
  93         workspace->cols++;
  94
  95         workspace->table = realloc(workspace->table, sizeof(Container**) * workspace->cols);
  96         workspace->table[workspace->cols-1] = calloc(sizeof(Container*) * workspace->rows, 1);
  97
  98         /* Move the other columns */
  99         for (int rows = 0; rows < workspace->rows; rows++)
 100                 for (int cols = workspace->cols - 1; cols > 0; cols--) {
 101                         LOG("Moving col %d to %d\n", cols-1, cols);
 102                         workspace->table[cols][rows] = workspace->table[cols-1][rows];
 103                         workspace->table[cols][rows]->col = cols;
 104                 }
 105
 106         for (int rows = 0; rows < workspace->rows; rows++)
 107                 new_container(workspace, &(workspace->table[0][rows]), 0, rows);
 108 }
 109
 110 /*
 111  * Shrinks the table by one column.
 112  *
 113  * The containers themselves are freed in move_columns_from() or move_rows_from(). Therefore, this
 114  * function may only be called from move_*() or after making sure that the containers are freed
 115  * properly.
 116  *
 117  */
 118 static void shrink_table_cols(Workspace *workspace) {
 119         workspace->cols--;
 120
 121         /* Free the container-pointers */
 122         free(workspace->table[workspace->cols]);
 123
 124         /* Re-allocate the table */
 125         workspace->table = realloc(workspace->table, sizeof(Container**) * workspace->cols);
 126 }
 127
 128 /*
 129  * See shrink_table_cols()
 130  *
 131  */
 132 static void shrink_table_rows(Workspace *workspace) {
 133         workspace->rows--;
 134         for (int cols = 0; cols < workspace->cols; cols++)
 135                 workspace->table[cols] = realloc(workspace->table[cols], sizeof(Container*) * workspace->rows);
 136 }
 137
 138
 139 /*
 140  * Performs simple bounds checking for the given column/row
 141  *
 142  */
 143 bool cell_exists(int col, int row) {
 144         return (col >= 0 && col < c_ws->cols) &&
 145                (row >= 0 && row < c_ws->rows);
 146 }
 147
 148 static void free_container(xcb_connection_t *conn, Workspace *workspace, int col, int row) {
 149         Container *old_container = workspace->table[col][row];
 150
 151         if (old_container->mode == MODE_STACK)
 152                 leave_stack_mode(conn, old_container);
 153
 154         free(old_container);
 155 }
 156
 157 static void move_columns_from(xcb_connection_t *conn, Workspace *workspace, int cols) {
 158         LOG("firstly freeing \n");
 159
 160         /* Free the columns which are cleaned up */
 161         for (int rows = 0; rows < workspace->rows; rows++)
 162                 free_container(conn, workspace, cols-1, rows);
 163
 164         for (; cols < workspace->cols; cols++)
 165                 for (int rows = 0; rows < workspace->rows; rows++) {
 166                         LOG("at col = %d, row = %d\n", cols, rows);
 167                         Container *new_container = workspace->table[cols][rows];
 168
 169                         LOG("moving cols = %d to cols -1 = %d\n", cols, cols-1);
 170                         workspace->table[cols-1][rows] = new_container;
 171
 172                         new_container->row = rows;
 173                         new_container->col = cols-1;
 174                 }
 175 }
 176
 177 static void move_rows_from(xcb_connection_t *conn, Workspace *workspace, int rows) {
 178         for (int cols = 0; cols < workspace->cols; cols++)
 179                 free_container(conn, workspace, cols, rows-1);
 180
 181         for (; rows < workspace->rows; rows++)
 182                 for (int cols = 0; cols < workspace->cols; cols++) {
 183                         Container *new_container = workspace->table[cols][rows];
 184
 185                         LOG("moving rows = %d to rows -1 = %d\n", rows, rows - 1);
 186                         workspace->table[cols][rows-1] = new_container;
 187
 188                         new_container->row = rows-1;
 189                         new_container->col = cols;
 190                 }
 191 }
 192
 193 void dump_table(xcb_connection_t *conn, Workspace *workspace) {
 194         LOG("dump_table()\n");
 195         FOR_TABLE(workspace) {
 196                 Container *con = workspace->table[cols][rows];
 197                 LOG("----\n");
 198                 LOG("at col=%d, row=%d\n", cols, rows);
 199                 LOG("currently_focused = %p\n", con->currently_focused);
 200                 Client *loop;
 201                 CIRCLEQ_FOREACH(loop, &(con->clients), clients) {
 202                         LOG("got client %08x / %s\n", loop->child, loop->name);
 203                 }
 204                 LOG("----\n");
 205         }
 206         LOG("done\n");
 207 }
 208
 209 /*
 210  * Shrinks the table by "compacting" it, that is, removing completely empty rows/columns
 211  *
 212  */
 213 void cleanup_table(xcb_connection_t *conn, Workspace *workspace) {
 214         LOG("cleanup_table()\n");
 215
 216         /* Check for empty columns if we got more than one column */
 217         for (int cols = 0; (workspace->cols > 1) && (cols < workspace->cols);) {
 218                 bool completely_empty = true;
 219                 for (int rows = 0; rows < workspace->rows; rows++)
 220                         if (workspace->table[cols][rows]->currently_focused != NULL) {
 221                                 completely_empty = false;
 222                                 break;
 223                         }
 224                 if (completely_empty) {
 225                         LOG("Removing completely empty column %d\n", cols);
 226                         if (cols < (workspace->cols - 1))
 227                                 move_columns_from(conn, workspace, cols+1);
 228                         else {
 229                                 for (int rows = 0; rows < workspace->rows; rows++)
 230                                         free_container(conn, workspace, cols, rows);
 231                         }
 232                         shrink_table_cols(workspace);
 233
 234                         if (workspace->current_col >= workspace->cols)
 235                                 workspace->current_col = workspace->cols - 1;
 236                 } else cols++;
 237         }
 238
 239         /* Check for empty rows if we got more than one row */
 240         for (int rows = 0; (workspace->rows > 1) && (rows < workspace->rows);) {
 241                 bool completely_empty = true;
 242                 LOG("Checking row %d\n", rows);
 243                 for (int cols = 0; cols < workspace->cols; cols++)
 244                         if (workspace->table[cols][rows]->currently_focused != NULL) {
 245                                 completely_empty = false;
 246                                 break;
 247                         }
 248                 if (completely_empty) {
 249                         LOG("Removing completely empty row %d\n", rows);
 250                         if (rows < (workspace->rows - 1))
 251                                 move_rows_from(conn, workspace, rows+1);
 252                         else {
 253                                 for (int cols = 0; cols < workspace->cols; cols++)
 254                                         free_container(conn, workspace, cols, rows);
 255                         }
 256                         shrink_table_rows(workspace);
 257
 258                         if (workspace->current_row >= workspace->rows)
 259                                 workspace->current_row = workspace->rows - 1;
 260                 } else rows++;
 261         }
 262
 263         /* Boundary checking for current_col and current_row */
 264         if (current_col >= c_ws->cols)
 265                 current_col = c_ws->cols-1;
 266
 267         if (current_row >= c_ws->rows)
 268                 current_row = c_ws->rows-1;
 269
 270         if (CUR_CELL->currently_focused != NULL)
 271                 set_focus(conn, CUR_CELL->currently_focused);
 272 }
 273
 274 /*
 275  * Fixes col/rowspan (makes sure there are no overlapping windows)
 276  *
 277  */
 278 void fix_colrowspan(xcb_connection_t *conn, Workspace *workspace) {
 279         LOG("Fixing col/rowspan\n");
 280
 281         FOR_TABLE(workspace) {
 282                 Container *con = workspace->table[cols][rows];
 283                 if (con->colspan > 1) {
 284                         LOG("gots one with colspan %d\n", con->colspan);
 285                         while (con->colspan > 1 &&
 286                                workspace->table[cols + (con->colspan - 1)][rows]->currently_focused != NULL)
 287                                 con->colspan--;
 288                         LOG("fixed it to %d\n", con->colspan);
 289                 }
 290                 if (con->rowspan > 1) {
 291                         LOG("gots one with rowspan %d\n", con->rowspan);
 292                         while (con->rowspan > 1 &&
 293                                workspace->table[cols][rows + (con->rowspan - 1)]->currently_focused != NULL)
 294                                 con->rowspan--;
 295                         LOG("fixed it to %d\n", con->rowspan);
 296                 }
 297         }
 298 }