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 static void shrink_table_cols(Workspace *workspace) {
  89         workspace->cols--;
  90         free(workspace->table[workspace->cols]);
  91         workspace->table = realloc(workspace->table, sizeof(Container**) * workspace->cols);
  92 }
  93
  94 static void shrink_table_rows(Workspace *workspace) {
  95         workspace->rows--;
  96         for (int cols = 0; cols < workspace->cols; cols++)
  97                 workspace->table[cols] = realloc(workspace->table[cols], sizeof(Container*) * workspace->rows);
  98 }
  99
 100
 101 /*
 102  * Performs simple bounds checking for the given column/row
 103  *
 104  */
 105 bool cell_exists(int col, int row) {
 106         return (col >= 0 && col < c_ws->cols) &&
 107                (row >= 0 && row < c_ws->rows);
 108 }
 109
 110 static void move_columns_from(xcb_connection_t *conn, Workspace *workspace, int cols) {
 111         for (; cols < workspace->cols; cols++)
 112                 for (int rows = 0; rows < workspace->rows; rows++) {
 113                         Container *old_container = workspace->table[cols-1][rows],
 114                                   *new_container = workspace->table[cols][rows];
 115
 116                         /* Fix the container backpointer for all clients */
 117                         Client *client;
 118                         CIRCLEQ_FOREACH(client, &(old_container->clients), clients)
 119                                 client->container = new_container;
 120
 121                         if (old_container->mode == MODE_STACK)
 122                                 leave_stack_mode(conn, old_container);
 123
 124                         free(old_container);
 125
 126                         printf("moving cols = %d to cols -1 = %d\n", cols, cols-1);
 127                         workspace->table[cols-1][rows] = new_container;
 128
 129                         new_container->row = rows;
 130                         new_container->col = cols-1;
 131
 132                         workspace->table[cols][rows] = NULL;
 133                 }
 134 }
 135
 136 static void move_rows_from(xcb_connection_t *conn, Workspace *workspace, int rows) {
 137         for (; rows < workspace->rows; rows++)
 138                 for (int cols = 0; cols < workspace->cols; cols++) {
 139                         Container *old_container = workspace->table[cols][rows-1],
 140                                   *new_container = workspace->table[cols][rows];
 141
 142                         /* Fix the container backpointer for all clients */
 143                         Client *client;
 144                         CIRCLEQ_FOREACH(client, &(old_container->clients), clients)
 145                                 client->container = new_container;
 146
 147                         if (old_container->mode == MODE_STACK)
 148                                 leave_stack_mode(conn, old_container);
 149
 150                         free(old_container);
 151
 152                         printf("moving rows = %d to rows -1 = %d\n", rows, rows - 1);
 153                         workspace->table[cols][rows-1] = new_container;
 154                         new_container->row = rows-1;
 155                         new_container->col = cols;
 156                         workspace->table[cols][rows] = NULL;
 157                 }
 158 }
 159
 160 /*
 161  * Shrinks the table by "compacting" it, that is, removing completely empty rows/columns
 162  *
 163  */
 164 void cleanup_table(xcb_connection_t *conn, Workspace *workspace) {
 165         printf("cleanup_table()\n");
 166
 167         /* Check for empty columns if we got more than one column */
 168         for (int cols = 0; (workspace->cols > 1) && (cols < workspace->cols);) {
 169                 bool completely_empty = true;
 170                 for (int rows = 0; rows < workspace->rows; rows++)
 171                         if (workspace->table[cols][rows]->currently_focused != NULL) {
 172                                 completely_empty = false;
 173                                 break;
 174                         }
 175                 if (completely_empty) {
 176                         printf("Removing completely empty column %d\n", cols);
 177                         if (cols < (workspace->cols - 1))
 178                                 move_columns_from(conn, workspace, cols+1);
 179                         shrink_table_cols(workspace);
 180
 181                         if (workspace->current_col >= workspace->cols)
 182                                 workspace->current_col = workspace->cols - 1;
 183                 } else cols++;
 184         }
 185
 186         /* Check for empty rows if we got more than one row*/
 187         for (int rows = 0; (workspace->rows > 1) && (rows < workspace->rows);) {
 188                 bool completely_empty = true;
 189                 for (int cols = 0; cols < workspace->cols; cols++)
 190                         if (workspace->table[cols][rows]->currently_focused != NULL) {
 191                                 completely_empty = false;
 192                                 break;
 193                         }
 194                 if (completely_empty) {
 195                         printf("Removing completely empty row %d\n", rows);
 196                         if (rows < (workspace->rows - 1))
 197                                 move_rows_from(conn, workspace, rows+1);
 198                         shrink_table_rows(workspace);
 199
 200                         if (workspace->current_row >= workspace->rows)
 201                                 workspace->current_row = workspace->rows - 1;
 202                 } else rows++;
 203         }
 204
 205         /* Boundary checking for current_col and current_row */
 206         if (current_col >= c_ws->cols)
 207                 current_col = c_ws->cols-1;
 208
 209         if (current_row >= c_ws->rows)
 210                 current_row = c_ws->rows-1;
 211
 212         if (CUR_CELL->currently_focused != NULL)
 213                 set_focus(conn, CUR_CELL->currently_focused);
 214 }