src/console/consoled-workspace.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 David Herrmann <dh.herrmann@gmail.com>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <inttypes.h>
  24 #include <stdlib.h>
  25 #include "consoled.h"
  26 #include "grdev.h"
  27 #include "idev.h"
  28 #include "list.h"
  29 #include "macro.h"
  30 #include "util.h"
  31
  32 int workspace_new(Workspace **out, Manager *m) {
  33         _cleanup_(workspace_unrefp) Workspace *w = NULL;
  34         int r;
  35
  36         assert(out);
  37
  38         w = new0(Workspace, 1);
  39         if (!w)
  40                 return -ENOMEM;
  41
  42         w->ref = 1;
  43         w->manager = m;
  44         LIST_PREPEND(workspaces_by_manager, m->workspace_list, w);
  45
  46         r = terminal_new(&w->current, w);
  47         if (r < 0)
  48                 return r;
  49
  50         *out = w;
  51         w = NULL;
  52         return 0;
  53 }
  54
  55 static void workspace_cleanup(Workspace *w) {
  56         Terminal *t;
  57
  58         assert(w);
  59         assert(w->ref == 0);
  60         assert(w->manager);
  61         assert(!w->session_list);
  62
  63         w->current = NULL;
  64         while ((t = w->terminal_list))
  65                 terminal_free(t);
  66
  67         LIST_REMOVE(workspaces_by_manager, w->manager->workspace_list, w);
  68         free(w);
  69 }
  70
  71 Workspace *workspace_ref(Workspace *w) {
  72         assert(w);
  73
  74         ++w->ref;
  75         return w;
  76 }
  77
  78 Workspace *workspace_unref(Workspace *w) {
  79         if (!w)
  80                 return NULL;
  81
  82         assert(w->ref > 0);
  83
  84         if (--w->ref == 0)
  85                 workspace_cleanup(w);
  86
  87         return NULL;
  88 }
  89
  90 Workspace *workspace_attach(Workspace *w, Session *s) {
  91         assert(w);
  92         assert(s);
  93
  94         LIST_PREPEND(sessions_by_workspace, w->session_list, s);
  95         workspace_refresh(w);
  96         return workspace_ref(w);
  97 }
  98
  99 Workspace *workspace_detach(Workspace *w, Session *s) {
 100         assert(w);
 101         assert(s);
 102         assert(s->active_ws == w);
 103
 104         LIST_REMOVE(sessions_by_workspace, w->session_list, s);
 105         workspace_refresh(w);
 106         return workspace_unref(w);
 107 }
 108
 109 void workspace_refresh(Workspace *w) {
 110         uint32_t width, height;
 111         Terminal *t;
 112         Session *s;
 113         Display *d;
 114
 115         assert(w);
 116
 117         width = 0;
 118         height = 0;
 119
 120         /* find out minimum dimension of all attached displays */
 121         LIST_FOREACH(sessions_by_workspace, s, w->session_list) {
 122                 LIST_FOREACH(displays_by_session, d, s->display_list) {
 123                         assert(d->width > 0 && d->height > 0);
 124
 125                         if (width == 0 || d->width < width)
 126                                 width = d->width;
 127                         if (height == 0 || d->height < height)
 128                                 height = d->height;
 129                 }
 130         }
 131
 132         /* either both are zero, or none is zero */
 133         assert(!(!width ^ !height));
 134
 135         /* update terminal-sizes if dimensions changed */
 136         if (w->width != width || w->height != height) {
 137                 w->width = width;
 138                 w->height = height;
 139
 140                 LIST_FOREACH(terminals_by_workspace, t, w->terminal_list)
 141                         terminal_resize(t);
 142
 143                 workspace_dirty(w);
 144         }
 145 }
 146
 147 void workspace_dirty(Workspace *w) {
 148         Session *s;
 149
 150         assert(w);
 151
 152         LIST_FOREACH(sessions_by_workspace, s, w->session_list)
 153                 session_dirty(s);
 154 }
 155
 156 void workspace_feed(Workspace *w, idev_data *data) {
 157         assert(w);
 158         assert(data);
 159
 160         terminal_feed(w->current, data);
 161 }
 162
 163 bool workspace_draw(Workspace *w, const grdev_display_target *target) {
 164         assert(w);
 165         assert(target);
 166
 167         return terminal_draw(w->current, target);
 168 }