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 #include "common/util.h"
  27
  28 extern AwesomeConf globalconf;
  29
  30 #include "widgetgen.h"
  31
  32 void
  33 widget_calculate_alignments(Widget *widget)
  34 {
  35     for(; widget; widget = widget->next)
  36     {
  37         if(widget->alignment == AlignFlex)
  38         {
  39             widget = widget->next;
  40             break;
  41         }
  42         widget->alignment = AlignLeft;
  43     }
  44
  45     if(widget)
  46         for(; widget; widget = widget->next)
  47         {
  48             if (widget->alignment == AlignFlex)
  49                 warn("Multiple flex widgets in panel -"
  50                      " ignoring flex for all but the first.");
  51             widget->alignment = AlignRight;
  52         }
  53 }
  54
  55 int
  56 widget_calculate_offset(int barwidth, int widgetwidth, int offset, int alignment)
  57 {
  58     switch(alignment)
  59     {
  60       case AlignLeft:
  61       case AlignFlex:
  62         return offset;
  63     }
  64     return barwidth - offset - widgetwidth;
  65 }
  66
  67 static Widget *
  68 widget_find(char *name, int screen)
  69 {
  70     Widget *widget;
  71     Statusbar *sb;
  72
  73     for(sb = globalconf.screens[screen].statusbar; sb; sb = sb->next)
  74         for(widget = sb->widgets; widget; widget = widget->next)
  75             if(a_strcmp(name, widget->name) == 0)
  76                 return widget;
  77
  78     return NULL;
  79 }
  80
  81 static void
  82 widget_common_button_press(Widget *widget, XButtonPressedEvent *ev)
  83 {
  84     Button *b;
  85
  86     for(b = widget->buttons; b; b = b->next)
  87         if(ev->button == b->button && CLEANMASK(ev->state) == b->mod && b->func)
  88         {
  89             b->func(widget->statusbar->screen, b->arg);
  90             break;
  91         }
  92 }
  93
  94 static void
  95 widget_common_tell(Widget *widget, char *command __attribute__ ((unused)))
  96 {
  97     warn("%s widget does not accept commands.\n", widget->name);
  98 }
  99
 100 void
 101 widget_common_new(Widget *widget, Statusbar *statusbar, cfg_t* config)
 102 {
 103     const char *name;
 104
 105     widget->statusbar = statusbar;
 106     name = cfg_title(config);
 107     widget->name = a_strdup(name);
 108     widget->tell = widget_common_tell;
 109     widget->button_press = widget_common_button_press;
 110     widget->area.x = cfg_getint(config, "x");
 111     widget->area.y = cfg_getint(config, "y");
 112     widget->user_supplied_x = (widget->area.x != (int) 0xffffffff);
 113     widget->user_supplied_y = (widget->area.y != (int) 0xffffffff);
 114 }
 115
 116 void
 117 widget_invalidate_cache(int screen, int flags)
 118 {
 119     Statusbar *statusbar;
 120     Widget *widget;
 121
 122     for(statusbar = globalconf.screens[screen].statusbar;
 123         statusbar;
 124         statusbar = statusbar->next)
 125         for(widget = statusbar->widgets; widget; widget = widget->next)
 126             if(widget->cache.flags & flags)
 127                 widget->cache.needs_update = True;
 128 }
 129
 130 /** Send command to widget
 131  * \param screen Screen ID
 132  * \param arg Widget command. Syntax depends on specific widget.
 133  * \ingroup ui_callback
 134  */
 135 void
 136 uicb_widget_tell(int screen, char *arg)
 137 {
 138     Widget *widget;
 139     char *p, *command;
 140     ssize_t len;
 141
 142     if (!arg)
 143     {
 144         warn("Must specify a widget.\n");
 145         return;
 146     }
 147
 148     len = a_strlen(arg);
 149     p = strtok(arg, " ");
 150     if(!p)
 151     {
 152         warn("Ignoring malformed widget command.\n");
 153         return;
 154     }
 155
 156     widget = widget_find(p, screen);
 157     if(!widget)
 158     {
 159         warn("No such widget: %s\n", p);
 160         return;
 161     }
 162
 163     if(p + a_strlen(p) < arg + len)
 164     {
 165         p = p + a_strlen(p) + 1;
 166         len = a_strlen(p);
 167         command = p_new(char, len + 1);
 168         a_strncpy(command, len + 1, p, len);
 169         widget->tell(widget, command);
 170         p_delete(&command);
 171     }
 172     else
 173         widget->tell(widget, NULL);
 174
 175     widget->cache.needs_update = True;
 176
 177     return;
 178 }
 179
 180 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80