Desktop
/* $Id: panel.c,v 1.8 2009/07/24 00:08:27 khorben Exp $ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Panel */
/* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>. */
#include <System.h>
#include <sys/time.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <gtk/gtk.h>
#include "panel.h"
/* Panel */
/* private */
/* types */
struct _Panel
{
GSList * apps;
GdkWindow * root;
GtkWidget * window;
GtkWidget * clock;
gint width; /* width of the root window */
gint height; /* height of the root window */
};
/* constants */
#ifndef PREFIX
# define PREFIX "/usr/local"
#endif
#define PANEL_BORDER_WIDTH 4
#define PANEL_ICON_SIZE 48
/* prototypes */
static int _panel_exec(Panel * panel, char const * command);
static gboolean _panel_idle_apps(gpointer data);
/* public */
/* panel_new */
static GtkWidget * _new_button(char const * stock);
static gboolean _on_button_press(GtkWidget * widget, GdkEventButton * event,
gpointer data);
static void _on_lock(GtkWidget * widget, gpointer data);
static void _on_menu(GtkWidget * widget, gpointer data);
static void _on_menu_position(GtkMenu * menu, gint * x, gint * y,
gboolean * push_in, gpointer data);
static void _on_run(GtkWidget * widget, gpointer data);
static gboolean _on_timeout_clock(gpointer data);
Panel * panel_new(void)
{
Panel * panel;
GtkWidget * event;
GtkWidget * hbox;
GtkWidget * widget;
gint x;
gint y;
gint depth;
if((panel = malloc(sizeof(*panel))) == NULL)
{
/* FIXME visually warn the user */
panel_error(NULL, "malloc", 1);
return NULL;
}
/* applications */
panel->apps = NULL;
g_idle_add(_panel_idle_apps, panel);
/* root window */
panel->root = gdk_screen_get_root_window(
gdk_display_get_default_screen(
gdk_display_get_default()));
gdk_window_get_geometry(panel->root, &x, &y, &panel->width,
&panel->height, &depth);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() x=%d y=%d width=%d height=%d depth=%d\n",
__func__, x, y, panel->width, panel->height, depth);
#endif
/* panel */
panel->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_move(GTK_WINDOW(panel->window), 0, panel->height
- PANEL_ICON_SIZE - (PANEL_BORDER_WIDTH * 2));
gtk_window_set_default_size(GTK_WINDOW(panel->window), panel->width,
PANEL_ICON_SIZE + (PANEL_BORDER_WIDTH * 2));
gtk_window_set_type_hint(GTK_WINDOW(panel->window),
GDK_WINDOW_TYPE_HINT_DOCK);
event = gtk_event_box_new();
g_signal_connect(G_OBJECT(event), "button-press-event", G_CALLBACK(
_on_button_press), panel);
hbox = gtk_hbox_new(FALSE, 4);
/* main menu */
widget = _new_button("gnome-main-menu");
g_signal_connect(G_OBJECT(widget), "clicked", G_CALLBACK(_on_menu),
panel);
gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
/* quick launch */
widget = _new_button("gnome-lockscreen");
g_signal_connect(G_OBJECT(widget), "clicked", G_CALLBACK(_on_lock),
panel);
gtk_box_pack_start(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(hbox), _new_button("gnome-logout"), FALSE,
TRUE, 0);
/* clock */
widget = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(widget), GTK_SHADOW_IN);
panel->clock = gtk_label_new(" \n ");
gtk_label_set_justify(GTK_LABEL(panel->clock), GTK_JUSTIFY_CENTER);
g_timeout_add(1000, _on_timeout_clock, panel);
_on_timeout_clock(panel);
gtk_container_add(GTK_CONTAINER(widget), panel->clock);
gtk_box_pack_end(GTK_BOX(hbox), widget, FALSE, TRUE, 0);
gtk_container_add(GTK_CONTAINER(event), hbox);
gtk_container_add(GTK_CONTAINER(panel->window), event);
gtk_container_set_border_width(GTK_CONTAINER(panel->window), 4);
gtk_widget_show_all(panel->window);
return panel;
}
static GtkWidget * _new_button(char const * stock)
{
GtkWidget * button;
GtkWidget * image;
button = gtk_button_new();
image = gtk_image_new_from_icon_name(stock,
GTK_ICON_SIZE_LARGE_TOOLBAR);
gtk_button_set_image(GTK_BUTTON(button), image);
gtk_button_set_relief(GTK_BUTTON(button), GTK_RELIEF_NONE);
return button;
}
static gboolean _on_button_press(GtkWidget * widget, GdkEventButton * event,
gpointer data)
{
GtkWidget * menu;
GtkWidget * menuitem;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(event->type != GDK_BUTTON_PRESS || event->button != 3)
return FALSE;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() right-click\n", __func__);
#endif
menu = gtk_menu_new();
menuitem = gtk_image_menu_item_new_from_stock(GTK_STOCK_PROPERTIES,
NULL);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
gtk_widget_show_all(menu);
gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, data, event->button,
event->time);
return FALSE;
}
static void _on_lock(GtkWidget * widget, gpointer data)
{
Panel * panel = data;
_panel_exec(panel, "xscreensaver-command -lock");
}
static GtkWidget * _menu_applications(Panel * panel);
static void _applications_activate(GtkWidget * widget, gpointer data);
static void _on_menu(GtkWidget * widget, gpointer data)
{
Panel * panel = data;
GtkWidget * menu;
GtkWidget * menuitem;
GtkWidget * image;
menu = gtk_menu_new();
menuitem = gtk_image_menu_item_new_with_label("Applications");
image = gtk_image_new_from_icon_name("gnome-applications",
GTK_ICON_SIZE_MENU);
gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(menuitem), image);
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem),
_menu_applications(panel));
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_separator_menu_item_new();
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_image_menu_item_new_with_label("Run...");
image = gtk_image_new_from_stock(GTK_STOCK_EXECUTE, GTK_ICON_SIZE_MENU);
gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(menuitem), image);
g_signal_connect(G_OBJECT(menuitem), "activate", G_CALLBACK(_on_run),
data);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_separator_menu_item_new();
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_image_menu_item_new_from_stock(GTK_STOCK_PREFERENCES,
NULL);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_separator_menu_item_new();
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_image_menu_item_new_with_label("Lock screen");
image = gtk_image_new_from_icon_name("gnome-lockscreen",
GTK_ICON_SIZE_MENU);
gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(menuitem), image);
g_signal_connect(G_OBJECT(menuitem), "activate", G_CALLBACK(_on_lock),
data);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
menuitem = gtk_image_menu_item_new_with_label("Logout...");
image = gtk_image_new_from_icon_name("gnome-logout",
GTK_ICON_SIZE_MENU);
gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(menuitem), image);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
gtk_widget_show_all(menu);
gtk_menu_popup(GTK_MENU(menu), NULL, NULL, _on_menu_position, data, 0,
gtk_get_current_event_time());
}
static GtkWidget * _menu_applications(Panel * panel)
{
GSList * p;
GtkWidget * menu;
GtkWidget * menuitem;
GtkWidget * image;
Config * config;
const char section[] = "Desktop Entry";
char const * q;
_panel_idle_apps(panel); /* just in case */
menu = gtk_menu_new();
for(p = panel->apps; p != NULL; p = p->next)
{
config = p->data;
q = config_get(config, section, "Name"); /* should not fail */
menuitem = gtk_image_menu_item_new_with_label(q);
if((q = config_get(config, section, "Icon")) != NULL)
{
image = gtk_image_new_from_icon_name(q,
GTK_ICON_SIZE_MENU);
gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(
menuitem), image);
}
q = config_get(config, section, "Exec"); /* should not fail */
g_signal_connect(G_OBJECT(menuitem), "activate", G_CALLBACK(
_applications_activate), (gpointer)q);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
}
return menu;
}
static void _applications_activate(GtkWidget * widget, gpointer data)
{
char const * program = data;
if(program == NULL)
return;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() \"%s\"", __func__, program);
#endif
_panel_exec(NULL, program);
}
static void _on_menu_position(GtkMenu * menu, gint * x, gint * y,
gboolean * push_in, gpointer data)
{
Panel * panel = data;
GtkRequisition req;
gtk_widget_size_request(GTK_WIDGET(menu), &req);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() width=%d, height=%d\n", __func__,
req.width, req.height);
#endif
if(req.height <= 0)
return;
*x = PANEL_BORDER_WIDTH;
*y = panel->height - PANEL_BORDER_WIDTH - PANEL_ICON_SIZE - req.height;
*push_in = TRUE;
}
static void _on_run(GtkWidget * widget, gpointer data)
{
Panel * panel = data;
_panel_exec(panel, "run");
}
static gboolean _on_timeout_clock(gpointer data)
{
Panel * panel = data;
struct timeval tv;
time_t t;
struct tm tm;
char buf[32];
if(gettimeofday(&tv, NULL) != 0)
return panel_error(panel, "gettimeofday", TRUE);
t = tv.tv_sec;
localtime_r(&t, &tm);
strftime(buf, sizeof(buf), "%H:%M:%S\n%d/%m/%Y", &tm);
gtk_label_set_text(GTK_LABEL(panel->clock), buf);
return TRUE;
}
/* panel_delete */
void panel_delete(Panel * panel)
{
free(panel);
}
/* useful */
static int _error_text(char const * message, int ret);
int panel_error(Panel * panel, char const * message, int ret)
{
GtkWidget * dialog;
if(panel == NULL)
return _error_text(message, ret);
dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE, "%s: %s", message, strerror(errno));
gtk_window_set_title(GTK_WINDOW(dialog), "Error");
g_signal_connect(G_OBJECT(dialog), "response", G_CALLBACK(
gtk_widget_destroy), NULL);
gtk_widget_show(dialog);
return ret;
}
static int _error_text(char const * message, int ret)
{
fputs("panel: ", stderr);
perror(message);
return ret;
}
/* private */
/* functions */
/* panel_exec */
static int _panel_exec(Panel * panel, char const * command)
{
pid_t pid;
if((pid = fork()) == -1)
return panel_error(panel, "fork", 1);
else if(pid != 0) /* the parent returns */
return 0;
execlp("/bin/sh", "sh", "-c", command, NULL);
exit(panel_error(NULL, command, 2));
return 1;
}
/* callbacks */
/* panel_idle_apps */
static gint _apps_compare(gconstpointer a, gconstpointer b);
static gboolean _panel_idle_apps(gpointer data)
{
Panel * panel = data;
const char path[] = PREFIX "/share/applications";
DIR * dir;
struct dirent * de;
size_t len;
const char ext[] = ".desktop";
const char section[] = "Desktop Entry";
char * name = NULL;
char * p;
Config * config = NULL;
String const * q;
String const * r;
if(panel->apps != NULL)
return FALSE;
if((dir = opendir(path)) == NULL)
return panel_error(panel, path, FALSE);
while((de = readdir(dir)) != NULL)
{
len = strlen(de->d_name);
if(len < sizeof(ext) || strncmp(&de->d_name[len - sizeof(ext)
+ 1], ext, sizeof(ext)) != 0)
continue;
if((p = realloc(name, sizeof(path) + len + 1)) == NULL)
{
panel_error(panel, "realloc", 1);
continue;
}
name = p;
snprintf(name, sizeof(path) + len + 1, "%s/%s", path,
de->d_name);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() \"%s\"\n", __func__, name);
#endif
if(config == NULL && (config = config_new()) == NULL)
continue; /* XXX report error */
else
config_reset(config);
config_load(config, name);
q = config_get(config, section, "Name");
r = config_get(config, section, "Exec");
if(q == NULL || r == NULL)
continue;
panel->apps = g_slist_insert_sorted(panel->apps, config,
_apps_compare);
config = NULL;
}
free(name);
closedir(dir);
return FALSE;
}
static gint _apps_compare(gconstpointer a, gconstpointer b)
{
Config * ca = (Config *)a;
Config * cb = (Config *)b;
char const * cap;
char const * cbp;
const char section[] = "Desktop Entry";
/* these should not fail */
cap = config_get(ca, section, "Name");
cbp = config_get(cb, section, "Name");
return string_compare(cap, cbp);
}