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 "util.h"
  24 #include "widget.h"
  25 #include "statusbar.h"
  26 #include "event.h"
  27
  28 extern AwesomeConf globalconf;
  29
  30 const name_func_link_t WidgetList[] =
  31 {
  32     {"taglist", taglist_new},
  33     {"layoutinfo", layoutinfo_new},
  34     {"focustitle", focustitle_new},
  35     {"textbox", textbox_new},
  36     {"iconbox", iconbox_new},
  37     {"netwmicon", netwmicon_new},
  38     {"progressbar", progressbar_new},
  39     {"graph", graph_new},
  40     {"tasklist", tasklist_new},
  41     {NULL, NULL}
  42 };
  43
  44 void
  45 widget_calculate_alignments(Widget *widget)
  46 {
  47     for(; widget; widget = widget->next)
  48     {
  49         if(widget->alignment == AlignFlex)
  50         {
  51             widget = widget->next;
  52             break;
  53         }
  54         widget->alignment = AlignLeft;
  55     }
  56
  57     if(widget)
  58         for(; widget; widget = widget->next)
  59         {
  60             if (widget->alignment == AlignFlex)
  61                 warn("Multiple flex widgets in panel -"
  62                      " ignoring flex for all but the first.");
  63             widget->alignment = AlignRight;
  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             b->func(widget->statusbar->screen, b->arg);
 101 }
 102
 103 static void
 104 widget_common_tell(Widget *widget, char *command __attribute__ ((unused)))
 105 {
 106     warn("%s widget does not accept commands.\n", widget->name);
 107 }
 108
 109 void
 110 widget_common_new(Widget *widget, Statusbar *statusbar, cfg_t* config)
 111 {
 112     const char *name;
 113
 114     widget->statusbar = statusbar;
 115     name = cfg_title(config);
 116     widget->name = a_strdup(name);
 117     widget->tell = widget_common_tell;
 118     widget->button_press = widget_common_button_press;
 119     widget->area.x = cfg_getint(config, "x");
 120     widget->area.y = cfg_getint(config, "y");
 121     widget->user_supplied_x = (widget->area.x != (int) 0xffffffff);
 122     widget->user_supplied_y = (widget->area.y != (int) 0xffffffff);
 123 }
 124
 125 void
 126 widget_invalidate_cache(int screen, int flags)
 127 {
 128     Statusbar *statusbar;
 129     Widget *widget;
 130
 131     for(statusbar = globalconf.screens[screen].statusbar;
 132         statusbar;
 133         statusbar = statusbar->next)
 134         for(widget = statusbar->widgets; widget; widget = widget->next)
 135             if(widget->cache.flags & flags)
 136                 widget->cache.needs_update = True;
 137 }
 138
 139 /** Send command to widget
 140  * \param screen Screen ID
 141  * \param arg Widget command. Syntax depends on specific widget.
 142  * \ingroup ui_callback
 143  */
 144 void
 145 uicb_widget_tell(int screen, char *arg)
 146 {
 147     Widget *widget;
 148     char *p, *command;
 149     ssize_t len;
 150
 151     if (!arg)
 152     {
 153         warn("Must specify a widget.\n");
 154         return;
 155     }
 156
 157     len = a_strlen(arg);
 158     p = strtok(arg, " ");
 159     if(!p)
 160     {
 161         warn("Ignoring malformed widget command.\n");
 162         return;
 163     }
 164
 165     widget = widget_find(p, screen);
 166     if(!widget)
 167     {
 168         warn("No such widget: %s\n", p);
 169         return;
 170     }
 171
 172     if(p + a_strlen(p) < arg + len)
 173     {
 174         p = p + a_strlen(p) + 1;
 175         len = a_strlen(p);
 176         command = p_new(char, len + 1);
 177         a_strncpy(command, len + 1, p, len);
 178         widget->tell(widget, command);
 179         p_delete(&command);
 180     }
 181     else
 182         widget->tell(widget, NULL);
 183
 184     widget->cache.needs_update = True;
 185
 186     return;
 187 }
 188
 189 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80