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awesome/widget.c

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/*
* widget.c - widget managing
*
* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
* Copyright © 2007 Aldo Cortesi <aldo@nullcube.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "widget.h"
#include "statusbar.h"
#include "event.h"
extern AwesomeConf globalconf;
#include "widgetgen.h"
/** Compute widget alignment.
* This will process all widget starting at `widget' and will check their
* alignment and guess it if set to AlignAuto.
* \param widget a linked list of all widgets
*/
void
widget_calculate_alignments(Widget *widget)
{
for(; widget && widget->alignment != AlignFlex; widget = widget->next)
{
switch(widget->alignment)
{
case AlignCenter:
warn("widgets cannot be center aligned\n");
case AlignAuto:
widget->alignment = AlignLeft;
break;
default:
break;
}
}
if(widget)
for(widget = widget->next; widget; widget = widget->next)
switch(widget->alignment)
{
case AlignFlex:
warn("multiple flex widgets (%s) in panel -"
" ignoring flex for all but the first.\n", widget->name);
widget->alignment = AlignRight;
break;
case AlignCenter:
warn("widget %s cannot be center aligned\n", widget->name);
case AlignAuto:
widget->alignment = AlignRight;
break;
default:
break;
}
}
/** Compute offset for drawing the first pixel of a widget.
* \param barwidth the statusbar width
* \param widgetwidth the widget width
* \param alignment the widget alignment on statusbar
* \return the x coordinate to draw at
*/
int
widget_calculate_offset(int barwidth, int widgetwidth, int offset, int alignment)
{
switch(alignment)
{
case AlignLeft:
case AlignFlex:
return offset;
}
return barwidth - offset - widgetwidth;
}
/** Find a widget on a screen by its name
* \param statusbar the statusbar to look into
* \param name the widget name
* \return a widget
*/
static Widget *
widget_getbyname(Statusbar *sb, char *name)
{
Widget *widget;
for(widget = sb->widgets; widget; widget = widget->next)
if(!a_strcmp(name, widget->name))
return widget;
return NULL;
}
/** Common function for button press event on widget.
* It will look into configuration to find the callback function to call.
* \param widget the widget
* \param ev the XButtonPressedEvent the widget received
*/
static void
widget_common_button_press(Widget *widget, XButtonPressedEvent *ev)
{
Button *b;
for(b = widget->buttons; b; b = b->next)
if(ev->button == b->button && CLEANMASK(ev->state) == b->mod && b->func)
{
b->func(widget->statusbar->screen, b->arg);
break;
}
}
/** Common tell function for widget, which only warn user that widget
* cannot be told anything
* \param widget the widget
* \param command unused argument
* \return widget_tell_status_t enum (see structs.h)
*/
static widget_tell_status_t
widget_common_tell(Widget *widget, char *property __attribute__ ((unused)),
char *command __attribute__ ((unused)))
{
warn("%s widget does not accept commands.\n", widget->name);
return WIDGET_ERROR_CUSTOM;
}
/** Common function for creating a widget
* \param widget The allocated widget
* \param statusbar the statusbar the widget is on
* \param config the cfg_t structure we will parse to set common info
*/
void
widget_common_new(Widget *widget, Statusbar *statusbar, cfg_t *config)
{
widget->statusbar = statusbar;
widget->name = a_strdup(cfg_title(config));
widget->tell = widget_common_tell;
widget->button_press = widget_common_button_press;
widget->area.x = cfg_getint(config, "x");
widget->area.y = cfg_getint(config, "y");
widget->user_supplied_x = (widget->area.x != (int) 0xffffffff);
widget->user_supplied_y = (widget->area.y != (int) 0xffffffff);
}
/** Invalidate widgets which should be refresh upon
* external modifications. Widget who watch flags will
* be set to be refreshed.
* \param screen screen id
* \param flags cache flags
*/
void
widget_invalidate_cache(int screen, int flags)
{
Statusbar *statusbar;
Widget *widget;
for(statusbar = globalconf.screens[screen].statusbar;
statusbar;
statusbar = statusbar->next)
for(widget = statusbar->widgets; widget; widget = widget->next)
if(widget->cache.flags & flags)
widget->cache.needs_update = True;
}
/** Send command to widget
* \param screen Screen ID
* \param arg Widget command. Syntax depends on specific widget.
* \ingroup ui_callback
*/
void
uicb_widget_tell(int screen, char *arg)
{
Statusbar *statusbar;
Widget *widget;
char *p, *property = NULL, *command;
ssize_t len;
widget_tell_status_t status;
if(!(len = a_strlen(arg)))
return warn("must specify a statusbar and a widget.\n");
if(!(p = strtok(arg, " ")))
return warn("ignoring malformed widget command (missing statusbar name).\n");
if(!(statusbar = statusbar_getbyname(screen, p)))
return warn("no such statusbar: %s\n", p);
if(!(p = strtok(NULL, " ")))
return warn("ignoring malformed widget command (missing widget name).\n");
if(!(widget = widget_getbyname(statusbar, p)))
return warn("no such widget: %s in statusbar %s.\n", p, statusbar->name);
if(!(p = strtok(NULL, " ")))
return warn("ignoring malformed widget command (missing property name).\n");
property = p;
p += a_strlen(property) + 1; /* could be out of 'arg' now */
/* arg + len points to the finishing \0.
* p to the char right of the first space (strtok delimiter)
*
* \0 is on the right(>) of p pointer => some text (command) */
if(arg + len > p)
{
len = a_strlen(p);
command = p_new(char, len + 1);
a_strncpy(command, len + 1, p, len);
status = widget->tell(widget, property, command);
p_delete(&command);
}
else
status = WIDGET_ERROR_NOVALUE;
switch(status)
{
case WIDGET_ERROR:
warn("error changing property %s of widget %s\n",
property, widget->name);
break;
case WIDGET_ERROR_NOVALUE:
warn("error changing property %s of widget %s, no value given\n",
property, widget->name);
break;
case WIDGET_ERROR_FORMAT_BOOL:
warn("error changing property %s of widget %s, must is boolean (0 or 1)\n",
property, widget->name);
break;
case WIDGET_ERROR_FORMAT_FONT:
warn("error changing property %s of widget %s, must be a valid font\n",
property, widget->name);
break;
case WIDGET_ERROR_FORMAT_COLOR:
warn("error changing property %s of widget %s, must be a valid color\n",
property, widget->name);
break;
case WIDGET_ERROR_FORMAT_SECTION:
warn("error changing property %s of widget %s, section/title not found\n",
property, widget->name);
break;
case WIDGET_NOERROR:
widget->cache.needs_update = True;
break;
case WIDGET_ERROR_CUSTOM:
break;
}
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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