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