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