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 = widget->next)
  35     {
  36         if(widget->alignment == AlignFlex)
  37         {
  38             widget = widget->next;
  39             break;
  40         }
  41         widget->alignment = AlignLeft;
  42     }
  43
  44     if(widget)
  45         for(; widget; widget = widget->next)
  46         {
  47             if (widget->alignment == AlignFlex)
  48                 warn("Multiple flex widgets in panel -"
  49                      " ignoring flex for all but the first.");
  50             widget->alignment = AlignRight;
  51         }
  52 }
  53
  54 int
  55 widget_calculate_offset(int barwidth, int widgetwidth, int offset, int alignment)
  56 {
  57     switch(alignment)
  58     {
  59       case AlignLeft:
  60       case AlignFlex:
  61         return offset;
  62     }
  63     return barwidth - offset - widgetwidth;
  64 }
  65
  66 static Widget *
  67 widget_find(char *name, int screen)
  68 {
  69     Widget *widget;
  70     Statusbar *sb;
  71
  72     for(sb = globalconf.screens[screen].statusbar; sb; sb = sb->next)
  73         for(widget = sb->widgets; widget; widget = widget->next)
  74             if(a_strcmp(name, widget->name) == 0)
  75                 return widget;
  76
  77     return NULL;
  78 }
  79
  80 static void
  81 widget_common_button_press(Widget *widget, XButtonPressedEvent *ev)
  82 {
  83     Button *b;
  84
  85     for(b = widget->buttons; b; b = b->next)
  86         if(ev->button == b->button && CLEANMASK(ev->state) == b->mod && b->func)
  87         {
  88             b->func(widget->statusbar->screen, b->arg);
  89             break;
  90         }
  91 }
  92
  93 static void
  94 widget_common_tell(Widget *widget, char *command __attribute__ ((unused)))
  95 {
  96     warn("%s widget does not accept commands.\n", widget->name);
  97 }
  98
  99 void
 100 widget_common_new(Widget *widget, Statusbar *statusbar, cfg_t* config)
 101 {
 102     const char *name;
 103
 104     widget->statusbar = statusbar;
 105     name = cfg_title(config);
 106     widget->name = a_strdup(name);
 107     widget->tell = widget_common_tell;
 108     widget->button_press = widget_common_button_press;
 109     widget->area.x = cfg_getint(config, "x");
 110     widget->area.y = cfg_getint(config, "y");
 111     widget->user_supplied_x = (widget->area.x != (int) 0xffffffff);
 112     widget->user_supplied_y = (widget->area.y != (int) 0xffffffff);
 113 }
 114
 115 void
 116 widget_invalidate_cache(int screen, int flags)
 117 {
 118     Statusbar *statusbar;
 119     Widget *widget;
 120
 121     for(statusbar = globalconf.screens[screen].statusbar;
 122         statusbar;
 123         statusbar = statusbar->next)
 124         for(widget = statusbar->widgets; widget; widget = widget->next)
 125             if(widget->cache.flags & flags)
 126                 widget->cache.needs_update = True;
 127 }
 128
 129 /** Send command to widget
 130  * \param screen Screen ID
 131  * \param arg Widget command. Syntax depends on specific widget.
 132  * \ingroup ui_callback
 133  */
 134 void
 135 uicb_widget_tell(int screen, char *arg)
 136 {
 137     Widget *widget;
 138     char *p, *command;
 139     ssize_t len;
 140
 141     if (!arg)
 142     {
 143         warn("Must specify a widget.\n");
 144         return;
 145     }
 146
 147     len = a_strlen(arg);
 148     p = strtok(arg, " ");
 149     if(!p)
 150     {
 151         warn("Ignoring malformed widget command.\n");
 152         return;
 153     }
 154
 155     widget = widget_find(p, screen);
 156     if(!widget)
 157     {
 158         warn("No such widget: %s\n", p);
 159         return;
 160     }
 161
 162     if(p + a_strlen(p) < arg + len)
 163     {
 164         p = p + a_strlen(p) + 1;
 165         len = a_strlen(p);
 166         command = p_new(char, len + 1);
 167         a_strncpy(command, len + 1, p, len);
 168         widget->tell(widget, command);
 169         p_delete(&command);
 170     }
 171     else
 172         widget->tell(widget, NULL);
 173
 174     widget->cache.needs_update = True;
 175
 176     return;
 177 }
 178
 179 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80