qulogic/libgnt

Make the combobox a tiny bit friendlier.
v2.7.3
2010-07-05, Sadrul Habib Chowdhury
ac8d8a62c098
Make the combobox a tiny bit friendlier.

Pressing the first letter of an item will now jump to that item (and
popup the dropdown first if necessary). Add some API in libgnt in the
process.
/**
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library 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 02111-1301 USA
*/
#define _GNU_SOURCE
#if (defined(__APPLE__) || defined(__unix__)) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
#define _XOPEN_SOURCE_EXTENDED
#endif
#include "config.h"
#include <gmodule.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "gntinternal.h"
#undef GNT_LOG_DOMAIN
#define GNT_LOG_DOMAIN "Main"
#include "gnt.h"
#include "gntbox.h"
#include "gntbutton.h"
#include "gntcolors.h"
#include "gntclipboard.h"
#include "gntkeys.h"
#include "gntlabel.h"
#include "gntmenu.h"
#include "gntstyle.h"
#include "gnttree.h"
#include "gntutils.h"
#include "gntwindow.h"
#include "gntwm.h"
#include <panel.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
/**
* Notes: Interesting functions to look at:
* scr_dump, scr_init, scr_restore: for workspaces
*
* Need to wattrset for colors to use with PDCurses.
*/
static GIOChannel *channel = NULL;
static guint channel_read_callback = 0;
static guint channel_error_callback = 0;
static gboolean ascii_only;
static gboolean mouse_enabled;
static void setup_io(void);
static gboolean refresh_screen(void);
static GntWM *wm;
static GntClipboard *clipboard;
int gnt_need_conversation_to_locale;
#define HOLDING_ESCAPE (escape_stuff.timer != 0)
static struct {
int timer;
} escape_stuff;
static gboolean
escape_timeout(gpointer data)
{
gnt_wm_process_input(wm, "\033");
escape_stuff.timer = 0;
return FALSE;
}
/**
* Mouse support:
* - bring a window on top if you click on its taskbar
* - click on the top-bar of the active window and drag+drop to move a window
* - click on a window to bring it to focus
* - allow scrolling in tree/textview on wheel-scroll event
* - click to activate button or select a row in tree
* wishlist:
* - have a little [X] on the windows, and clicking it will close that window.
*/
static gboolean
detect_mouse_action(const char *buffer)
{
int x, y;
static enum {
MOUSE_NONE,
MOUSE_LEFT,
MOUSE_RIGHT,
MOUSE_MIDDLE
} button = MOUSE_NONE;
static GntWidget *remember = NULL;
static int offset = 0;
GntMouseEvent event;
GntWidget *widget = NULL;
PANEL *p = NULL;
if (!wm->cws->ordered || buffer[0] != 27)
return FALSE;
buffer++;
if (strlen(buffer) < 5)
return FALSE;
x = buffer[3];
y = buffer[4];
if (x < 0) x += 256;
if (y < 0) y += 256;
x -= 33;
y -= 33;
while ((p = panel_below(p)) != NULL) {
const GntNode *node = panel_userptr(p);
GntWidget *wid;
if (!node)
continue;
wid = node->me;
if (x >= wid->priv.x && x < wid->priv.x + wid->priv.width) {
if (y >= wid->priv.y && y < wid->priv.y + wid->priv.height) {
widget = wid;
break;
}
}
}
if (strncmp(buffer, "[M ", 3) == 0) {
/* left button down */
/* Bring the window you clicked on to front */
/* If you click on the topbar, then you can drag to move the window */
event = GNT_LEFT_MOUSE_DOWN;
} else if (strncmp(buffer, "[M\"", 3) == 0) {
/* right button down */
event = GNT_RIGHT_MOUSE_DOWN;
} else if (strncmp(buffer, "[M!", 3) == 0) {
/* middle button down */
event = GNT_MIDDLE_MOUSE_DOWN;
} else if (strncmp(buffer, "[M`", 3) == 0) {
/* wheel up*/
event = GNT_MOUSE_SCROLL_UP;
} else if (strncmp(buffer, "[Ma", 3) == 0) {
/* wheel down */
event = GNT_MOUSE_SCROLL_DOWN;
} else if (strncmp(buffer, "[M#", 3) == 0) {
/* button up */
event = GNT_MOUSE_UP;
} else
return FALSE;
if (widget && gnt_wm_process_click(wm, event, x, y, widget))
return TRUE;
if (event == GNT_LEFT_MOUSE_DOWN && widget && widget != wm->_list.window &&
!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_TRANSIENT)) {
if (widget != wm->cws->ordered->data) {
gnt_wm_raise_window(wm, widget);
}
if (y == widget->priv.y) {
offset = x - widget->priv.x;
remember = widget;
button = MOUSE_LEFT;
}
} else if (event == GNT_MOUSE_UP) {
if (button == MOUSE_NONE && y == getmaxy(stdscr) - 1) {
/* Clicked on the taskbar */
int n = g_list_length(wm->cws->list);
if (n) {
int width = getmaxx(stdscr) / n;
gnt_bindable_perform_action_named(GNT_BINDABLE(wm), "switch-window-n", x/width, NULL);
}
} else if (button == MOUSE_LEFT && remember) {
x -= offset;
if (x < 0) x = 0;
if (y < 0) y = 0;
gnt_screen_move_widget(remember, x, y);
}
button = MOUSE_NONE;
remember = NULL;
offset = 0;
}
if (widget)
gnt_widget_clicked(widget, event, x, y);
return TRUE;
}
static gboolean
io_invoke_error(GIOChannel *source, GIOCondition cond, gpointer data)
{
int id = GPOINTER_TO_INT(data);
g_source_remove(id);
g_io_channel_unref(source);
channel = NULL;
setup_io();
return TRUE;
}
static gboolean
io_invoke(GIOChannel *source, GIOCondition cond, gpointer null)
{
char keys[256];
gssize rd;
char *k;
char *cvrt = NULL;
if (wm->mode == GNT_KP_MODE_WAIT_ON_CHILD)
return FALSE;
rd = read(STDIN_FILENO, keys + HOLDING_ESCAPE, sizeof(keys) - 1 - HOLDING_ESCAPE);
if (rd < 0)
{
int ch = getch(); /* This should return ERR, but let's see what it really returns */
endwin();
printf("ERROR: %s\n", strerror(errno));
printf("File descriptor is: %d\n\nGIOChannel is: %p\ngetch() = %d\n", STDIN_FILENO, source, ch);
raise(SIGABRT);
}
else if (rd == 0)
{
endwin();
printf("EOF\n");
raise(SIGABRT);
}
rd += HOLDING_ESCAPE;
if (HOLDING_ESCAPE) {
keys[0] = '\033';
g_source_remove(escape_stuff.timer);
escape_stuff.timer = 0;
}
keys[rd] = 0;
gnt_wm_set_event_stack(wm, TRUE);
cvrt = g_locale_to_utf8(keys, rd, (gsize*)&rd, NULL, NULL);
k = cvrt ? cvrt : keys;
if (mouse_enabled && detect_mouse_action(k))
goto end;
#if 0
/* I am not sure what's happening here. If this actually does something,
* then this needs to go in gnt_keys_refine. */
if (*k < 0) { /* Alt not sending ESC* */
*(k + 1) = 128 - *k;
*k = 27;
*(k + 2) = 0;
rd++;
}
#endif
while (rd) {
char back;
int p;
if (k[0] == '\033' && rd == 1) {
escape_stuff.timer = g_timeout_add(250, escape_timeout, NULL);
break;
}
gnt_keys_refine(k);
p = MAX(1, gnt_keys_find_combination(k));
back = k[p];
k[p] = '\0';
gnt_wm_process_input(wm, k); /* XXX: */
k[p] = back;
rd -= p;
k += p;
}
end:
if (wm)
gnt_wm_set_event_stack(wm, FALSE);
g_free(cvrt);
return TRUE;
}
static void
setup_io()
{
int result;
channel = g_io_channel_unix_new(STDIN_FILENO);
g_io_channel_set_close_on_unref(channel, TRUE);
#if 0
g_io_channel_set_encoding(channel, NULL, NULL);
g_io_channel_set_buffered(channel, FALSE);
g_io_channel_set_flags(channel, G_IO_FLAG_NONBLOCK, NULL );
#endif
channel_read_callback = result = g_io_add_watch_full(channel, G_PRIORITY_HIGH,
(G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI),
io_invoke, NULL, NULL);
channel_error_callback = g_io_add_watch_full(channel, G_PRIORITY_HIGH,
(G_IO_NVAL),
io_invoke_error, GINT_TO_POINTER(result), NULL);
g_io_channel_unref(channel); /* Apparently this caused crashes for some people.
But irssi does this, so I am going to assume the
crashes were caused by some other stuff. */
gnt_warning("setting up IO (%d)", channel_read_callback);
}
static gboolean
refresh_screen(void)
{
gnt_bindable_perform_action_named(GNT_BINDABLE(wm), "refresh-screen", NULL);
return FALSE;
}
/* Xerox */
static void
clean_pid(void)
{
int status;
pid_t pid;
do {
pid = waitpid(-1, &status, WNOHANG);
} while (pid != 0 && pid != (pid_t)-1);
if ((pid == (pid_t) - 1) && (errno != ECHILD)) {
char errmsg[BUFSIZ];
g_snprintf(errmsg, BUFSIZ, "Warning: waitpid() returned %d", pid);
perror(errmsg);
}
}
static void
exit_confirmed(gpointer null)
{
gnt_bindable_perform_action_named(GNT_BINDABLE(wm), "wm-quit", NULL);
}
static void
exit_win_close(GntWidget *w, GntWidget **win)
{
*win = NULL;
}
static void
ask_before_exit(void)
{
static GntWidget *win = NULL;
GntWidget *bbox, *button;
if (wm->menu) {
do {
gnt_widget_hide(GNT_WIDGET(wm->menu));
if (wm->menu)
wm->menu = wm->menu->parentmenu;
} while (wm->menu);
}
if (win)
goto raise;
win = gnt_vwindow_new(FALSE);
gnt_box_add_widget(GNT_BOX(win), gnt_label_new("Are you sure you want to quit?"));
gnt_box_set_title(GNT_BOX(win), "Quit?");
gnt_box_set_alignment(GNT_BOX(win), GNT_ALIGN_MID);
g_signal_connect(G_OBJECT(win), "destroy", G_CALLBACK(exit_win_close), &win);
bbox = gnt_hbox_new(FALSE);
gnt_box_add_widget(GNT_BOX(win), bbox);
button = gnt_button_new("Quit");
g_signal_connect(G_OBJECT(button), "activate", G_CALLBACK(exit_confirmed), NULL);
gnt_box_add_widget(GNT_BOX(bbox), button);
button = gnt_button_new("Cancel");
g_signal_connect_swapped(G_OBJECT(button), "activate", G_CALLBACK(gnt_widget_destroy), win);
gnt_box_add_widget(GNT_BOX(bbox), button);
gnt_widget_show(win);
raise:
gnt_wm_raise_window(wm, win);
}
#ifdef SIGWINCH
static void (*org_winch_handler)(int);
#endif
static void
sighandler(int sig)
{
switch (sig) {
#ifdef SIGWINCH
case SIGWINCH:
erase();
g_idle_add((GSourceFunc)refresh_screen, NULL);
if (org_winch_handler)
org_winch_handler(sig);
signal(SIGWINCH, sighandler);
break;
#endif
case SIGCHLD:
clean_pid();
signal(SIGCHLD, sighandler);
break;
case SIGINT:
ask_before_exit();
signal(SIGINT, sighandler);
break;
}
}
static void
init_wm(void)
{
const char *name = gnt_style_get(GNT_STYLE_WM);
gpointer handle;
if (name && *name) {
handle = g_module_open(name, G_MODULE_BIND_LAZY);
if (handle) {
gboolean (*init)(GntWM **);
if (g_module_symbol(handle, "gntwm_init", (gpointer)&init)) {
init(&wm);
}
}
}
if (wm == NULL)
wm = g_object_new(GNT_TYPE_WM, NULL);
}
void gnt_init()
{
char *filename;
const char *locale;
if (channel)
return;
locale = setlocale(LC_ALL, "");
setup_io();
#ifdef NO_WIDECHAR
ascii_only = TRUE;
#else
if (locale && (strstr(locale, "UTF") || strstr(locale, "utf"))) {
ascii_only = FALSE;
} else {
ascii_only = TRUE;
gnt_need_conversation_to_locale = TRUE;
}
#endif
initscr();
typeahead(-1);
noecho();
curs_set(0);
gnt_init_keys();
gnt_init_styles();
filename = g_build_filename(g_get_home_dir(), ".gntrc", NULL);
gnt_style_read_configure_file(filename);
g_free(filename);
gnt_init_colors();
wbkgdset(stdscr, '\0' | gnt_color_pair(GNT_COLOR_NORMAL));
refresh();
#ifdef ALL_MOUSE_EVENTS
if ((mouse_enabled = gnt_style_get_bool(GNT_STYLE_MOUSE, FALSE)))
mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, NULL);
#endif
wbkgdset(stdscr, '\0' | gnt_color_pair(GNT_COLOR_NORMAL));
werase(stdscr);
wrefresh(stdscr);
#ifdef SIGWINCH
org_winch_handler = signal(SIGWINCH, sighandler);
#endif
signal(SIGCHLD, sighandler);
signal(SIGINT, sighandler);
signal(SIGPIPE, SIG_IGN);
g_type_init();
init_wm();
clipboard = g_object_new(GNT_TYPE_CLIPBOARD, NULL);
}
void gnt_main()
{
wm->loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(wm->loop);
}
/*********************************
* Stuff for 'window management' *
*********************************/
void gnt_window_present(GntWidget *window)
{
if (wm->event_stack)
gnt_wm_raise_window(wm, window);
else
gnt_widget_set_urgent(window);
}
void gnt_screen_occupy(GntWidget *widget)
{
gnt_wm_new_window(wm, widget);
}
void gnt_screen_release(GntWidget *widget)
{
if (wm)
gnt_wm_window_close(wm, widget);
}
void gnt_screen_update(GntWidget *widget)
{
gnt_wm_update_window(wm, widget);
}
gboolean gnt_widget_has_focus(GntWidget *widget)
{
GntWidget *w;
if (!widget)
return FALSE;
if (GNT_IS_MENU(widget))
return TRUE;
w = widget;
while (widget->parent)
widget = widget->parent;
if (widget == wm->_list.window)
return TRUE;
if (wm->cws->ordered && wm->cws->ordered->data == widget) {
if (GNT_IS_BOX(widget) &&
(GNT_BOX(widget)->active == w || widget == w))
return TRUE;
}
return FALSE;
}
void gnt_widget_set_urgent(GntWidget *widget)
{
while (widget->parent)
widget = widget->parent;
if (wm->cws->ordered && wm->cws->ordered->data == widget)
return;
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_URGENT);
gnt_wm_update_window(wm, widget);
}
void gnt_quit()
{
/* Prevent io_invoke() from being called after wm is destroyed */
g_source_remove(channel_error_callback);
g_source_remove(channel_read_callback);
channel_error_callback = 0;
channel_read_callback = 0;
g_object_unref(G_OBJECT(wm));
wm = NULL;
update_panels();
doupdate();
gnt_uninit_colors();
gnt_uninit_styles();
endwin();
}
gboolean gnt_ascii_only()
{
return ascii_only;
}
void gnt_screen_resize_widget(GntWidget *widget, int width, int height)
{
gnt_wm_resize_window(wm, widget, width, height);
}
void gnt_screen_move_widget(GntWidget *widget, int x, int y)
{
gnt_wm_move_window(wm, widget, x, y);
}
void gnt_screen_rename_widget(GntWidget *widget, const char *text)
{
gnt_box_set_title(GNT_BOX(widget), text);
gnt_widget_draw(widget);
gnt_wm_update_window(wm, widget);
}
void gnt_register_action(const char *label, void (*callback)(void))
{
GntAction *action = g_new0(GntAction, 1);
action->label = g_strdup(label);
action->callback = callback;
wm->acts = g_list_append(wm->acts, action);
}
static void
reset_menu(GntWidget *widget, gpointer null)
{
wm->menu = NULL;
}
gboolean gnt_screen_menu_show(gpointer newmenu)
{
if (wm->menu) {
/* For now, if a menu is being displayed, then another menu
* can NOT take over. */
return FALSE;
}
wm->menu = newmenu;
GNT_WIDGET_UNSET_FLAGS(GNT_WIDGET(wm->menu), GNT_WIDGET_INVISIBLE);
gnt_widget_draw(GNT_WIDGET(wm->menu));
g_signal_connect(G_OBJECT(wm->menu), "hide", G_CALLBACK(reset_menu), NULL);
g_signal_connect(G_OBJECT(wm->menu), "destroy", G_CALLBACK(reset_menu), NULL);
return TRUE;
}
void gnt_set_clipboard_string(const gchar *string)
{
gnt_clipboard_set_string(clipboard, string);
}
GntClipboard *gnt_get_clipboard()
{
return clipboard;
}
gchar *gnt_get_clipboard_string()
{
return gnt_clipboard_get_string(clipboard);
}
#if GLIB_CHECK_VERSION(2,4,0)
typedef struct
{
void (*callback)(int status, gpointer data);
gpointer data;
} ChildProcess;
static void
reap_child(GPid pid, gint status, gpointer data)
{
ChildProcess *cp = data;
if (cp->callback) {
cp->callback(status, cp->data);
}
g_free(cp);
clean_pid();
wm->mode = GNT_KP_MODE_NORMAL;
endwin();
setup_io();
refresh();
refresh_screen();
}
#endif
gboolean gnt_giveup_console(const char *wd, char **argv, char **envp,
gint *stin, gint *stout, gint *sterr,
void (*callback)(int status, gpointer data), gpointer data)
{
#if GLIB_CHECK_VERSION(2,4,0)
GPid pid = 0;
ChildProcess *cp = NULL;
if (!g_spawn_async_with_pipes(wd, argv, envp,
G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
(GSpawnChildSetupFunc)endwin, NULL,
&pid, stin, stout, sterr, NULL))
return FALSE;
cp = g_new0(ChildProcess, 1);
cp->callback = callback;
cp->data = data;
g_source_remove(channel_read_callback);
wm->mode = GNT_KP_MODE_WAIT_ON_CHILD;
g_child_watch_add(pid, reap_child, cp);
return TRUE;
#else
return FALSE;
#endif
}
gboolean gnt_is_refugee()
{
#if GLIB_CHECK_VERSION(2,4,0)
return (wm && wm->mode == GNT_KP_MODE_WAIT_ON_CHILD);
#else
return FALSE;
#endif
}
const char *C_(const char *x)
{
static char *c = NULL;
if (gnt_need_conversation_to_locale) {
GError *error = NULL;
g_free(c);
c = g_locale_from_utf8(x, -1, NULL, NULL, &error);
if (c == NULL || error) {
char *store = c;
c = NULL;
gnt_warning("Error: %s\n", error ? error->message : "(unknown)");
g_error_free(error);
error = NULL;
g_free(c);
c = store;
}
return c ? c : x;
} else
return x;
}