widget.c

   1 /*
   2  * widget.c - widget managing
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   5  * Copyright © 2007 Aldo Cortesi <aldo@nullcube.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #include "widget.h"
  24 #include "statusbar.h"
  25 #include "event.h"
  26
  27 extern AwesomeConf globalconf;
  28
  29 #include "widgetgen.h"
  30
  31 void
  32 widget_calculate_alignments(Widget *widget)
  33 {
  34     for(; widget && widget->alignment != AlignFlex; widget = widget->next)
  35     {
  36         switch(widget->alignment)
  37         {
  38           case AlignCenter:
  39             warn("widgets cannot be center aligned\n");
  40           case AlignAuto:
  41             widget->alignment = AlignLeft;
  42             break;
  43           default:
  44             break;
  45         }
  46     }
  47
  48     if(widget)
  49         for(widget = widget->next; widget; widget = widget->next)
  50             switch(widget->alignment)
  51             {
  52               case AlignFlex:
  53                 warn("multiple flex widgets in panel -"
  54                      " ignoring flex for all but the first.\n");
  55                 widget->alignment = AlignRight;
  56                 break;
  57               case AlignCenter:
  58                 warn("widgets cannot be center aligned\n");
  59               case AlignAuto:
  60                 widget->alignment = AlignRight;
  61                 break;
  62               default:
  63                 break;
  64             }
  65 }
  66
  67 int
  68 widget_calculate_offset(int barwidth, int widgetwidth, int offset, int alignment)
  69 {
  70     switch(alignment)
  71     {
  72       case AlignLeft:
  73       case AlignFlex:
  74         return offset;
  75     }
  76     return barwidth - offset - widgetwidth;
  77 }
  78
  79 static Widget *
  80 widget_find(char *name, int screen)
  81 {
  82     Widget *widget;
  83     Statusbar *sb;
  84
  85     for(sb = globalconf.screens[screen].statusbar; sb; sb = sb->next)
  86         for(widget = sb->widgets; widget; widget = widget->next)
  87             if(a_strcmp(name, widget->name) == 0)
  88                 return widget;
  89
  90     return NULL;
  91 }
  92
  93 static void
  94 widget_common_button_press(Widget *widget, XButtonPressedEvent *ev)
  95 {
  96     Button *b;
  97
  98     for(b = widget->buttons; b; b = b->next)
  99         if(ev->button == b->button && CLEANMASK(ev->state) == b->mod && b->func)
 100         {
 101             b->func(widget->statusbar->screen, b->arg);
 102             break;
 103         }
 104 }
 105
 106 static void
 107 widget_common_tell(Widget *widget, char *command __attribute__ ((unused)))
 108 {
 109     warn("%s widget does not accept commands.\n", widget->name);
 110 }
 111
 112 void
 113 widget_common_new(Widget *widget, Statusbar *statusbar, cfg_t* config)
 114 {
 115     const char *name;
 116
 117     widget->statusbar = statusbar;
 118     name = cfg_title(config);
 119     widget->name = a_strdup(name);
 120     widget->tell = widget_common_tell;
 121     widget->button_press = widget_common_button_press;
 122     widget->area.x = cfg_getint(config, "x");
 123     widget->area.y = cfg_getint(config, "y");
 124     widget->user_supplied_x = (widget->area.x != (int) 0xffffffff);
 125     widget->user_supplied_y = (widget->area.y != (int) 0xffffffff);
 126 }
 127
 128 void
 129 widget_invalidate_cache(int screen, int flags)
 130 {
 131     Statusbar *statusbar;
 132     Widget *widget;
 133
 134     for(statusbar = globalconf.screens[screen].statusbar;
 135         statusbar;
 136         statusbar = statusbar->next)
 137         for(widget = statusbar->widgets; widget; widget = widget->next)
 138             if(widget->cache.flags & flags)
 139                 widget->cache.needs_update = True;
 140 }
 141
 142 /** Send command to widget
 143  * \param screen Screen ID
 144  * \param arg Widget command. Syntax depends on specific widget.
 145  * \ingroup ui_callback
 146  */
 147 void
 148 uicb_widget_tell(int screen, char *arg)
 149 {
 150     Widget *widget;
 151     char *p, *command;
 152     ssize_t len;
 153
 154     if (!arg)
 155     {
 156         warn("Must specify a widget.\n");
 157         return;
 158     }
 159
 160     len = a_strlen(arg);
 161     p = strtok(arg, " ");
 162     if(!p)
 163     {
 164         warn("Ignoring malformed widget command.\n");
 165         return;
 166     }
 167
 168     widget = widget_find(p, screen);
 169     if(!widget)
 170     {
 171         warn("No such widget: %s\n", p);
 172         return;
 173     }
 174
 175     if(p + a_strlen(p) < arg + len)
 176     {
 177         p = p + a_strlen(p) + 1;
 178         len = a_strlen(p);
 179         command = p_new(char, len + 1);
 180         a_strncpy(command, len + 1, p, len);
 181         widget->tell(widget, command);
 182         p_delete(&command);
 183     }
 184     else
 185         widget->tell(widget, NULL);
 186
 187     widget->cache.needs_update = True;
 188
 189     return;
 190 }
 191
 192 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80