freebsd-dev/contrib/dialog/guage.c

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/*
* $Id: guage.c,v 1.68 2013/09/22 19:10:22 tom Exp $
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*
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* guage.c -- implements the gauge dialog
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*
* Copyright 2000-2012,2013 Thomas E. Dickey
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*
* An earlier version of this program lists as authors
* Marc Ewing, Red Hat Software
*/
#include <dialog.h>
#include <errno.h>
#define MY_LEN (MAX_LEN)/2
#define MIN_HIGH (4)
#define MIN_WIDE (10 + 2 * (2 + MARGIN))
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#define isMarker(buf) !strncmp(buf, "XXX", (size_t) 3)
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typedef struct _my_obj {
DIALOG_CALLBACK obj; /* has to be first in struct */
struct _my_obj *next;
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WINDOW *text;
char *title;
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char *prompt;
char prompt_buf[MY_LEN];
int percent;
int height;
int width;
char line[MAX_LEN + 1];
} MY_OBJ;
static MY_OBJ *all_objects;
static int
valid(MY_OBJ * obj)
{
MY_OBJ *list = all_objects;
int result = 0;
while (list != 0) {
if (list == obj) {
result = 1;
break;
}
list = list->next;
}
return result;
}
static void
delink(MY_OBJ * obj)
{
MY_OBJ *p = all_objects;
MY_OBJ *q = 0;
while (p != 0) {
if (p == obj) {
if (q != 0) {
q->next = p->next;
} else {
all_objects = p->next;
}
break;
}
q = p;
p = p->next;
}
}
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static int
read_data(char *buffer, FILE *fp)
{
int result;
if (feof(fp)) {
result = 0;
} else if (fgets(buffer, MY_LEN, fp) != 0) {
DLG_TRACE(("read_data:%s", buffer));
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buffer[MY_LEN] = '\0';
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dlg_trim_string(buffer);
result = 1;
} else {
result = -1;
}
return result;
}
static int
decode_percent(char *buffer)
{
char *tmp = 0;
long value = strtol(buffer, &tmp, 10);
if (tmp != 0 && (*tmp == 0 || isspace(UCH(*tmp))) && value >= 0) {
return TRUE;
}
return FALSE;
}
static void
repaint_text(MY_OBJ * obj)
{
WINDOW *dialog = obj->obj.win;
int i, x;
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if (dialog != 0 && obj->obj.input != 0) {
(void) werase(dialog);
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dlg_draw_box2(dialog, 0, 0, obj->height, obj->width, dialog_attr,
border_attr, border2_attr);
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dlg_draw_title(dialog, obj->title);
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(void) wattrset(dialog, dialog_attr);
dlg_draw_helpline(dialog, FALSE);
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dlg_print_autowrap(dialog, obj->prompt, obj->height, obj->width);
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dlg_draw_box2(dialog,
obj->height - 4, 2 + MARGIN,
2 + MARGIN, obj->width - 2 * (2 + MARGIN),
dialog_attr,
border_attr,
border2_attr);
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/*
* Clear the area for the progress bar by filling it with spaces
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* in the gauge-attribute, and write the percentage with that
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* attribute.
*/
(void) wmove(dialog, obj->height - 3, 4);
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(void) wattrset(dialog, gauge_attr);
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for (i = 0; i < (obj->width - 2 * (3 + MARGIN)); i++)
(void) waddch(dialog, ' ');
(void) wmove(dialog, obj->height - 3, (obj->width / 2) - 2);
(void) wprintw(dialog, "%3d%%", obj->percent);
/*
* Now draw a bar in reverse, relative to the background.
* The window attribute was useful for painting the background,
* but requires some tweaks to reverse it.
*/
x = (obj->percent * (obj->width - 2 * (3 + MARGIN))) / 100;
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if ((gauge_attr & A_REVERSE) != 0) {
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wattroff(dialog, A_REVERSE);
} else {
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(void) wattrset(dialog, A_REVERSE);
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}
(void) wmove(dialog, obj->height - 3, 4);
for (i = 0; i < x; i++) {
chtype ch2 = winch(dialog);
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if (gauge_attr & A_REVERSE) {
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ch2 &= ~A_REVERSE;
}
(void) waddch(dialog, ch2);
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}
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(void) wrefresh(dialog);
}
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}
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static bool
handle_input(DIALOG_CALLBACK * cb)
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{
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MY_OBJ *obj = (MY_OBJ *) cb;
bool result;
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int status;
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char buf[MY_LEN + 1];
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if (dialog_state.pipe_input == 0) {
status = -1;
} else if ((status = read_data(buf, dialog_state.pipe_input)) > 0) {
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if (isMarker(buf)) {
/*
* Historically, next line should be percentage, but one of the
* worse-written clones of 'dialog' assumes the number is missing.
* (Gresham's Law applied to software).
*/
if ((status = read_data(buf, dialog_state.pipe_input)) > 0) {
obj->prompt_buf[0] = '\0';
if (decode_percent(buf))
obj->percent = atoi(buf);
else
strcpy(obj->prompt_buf, buf);
/* Rest is message text */
while ((status = read_data(buf, dialog_state.pipe_input)) > 0
&& !isMarker(buf)) {
if (strlen(obj->prompt_buf) + strlen(buf) <
sizeof(obj->prompt_buf) - 1) {
strcat(obj->prompt_buf, buf);
}
}
if (obj->prompt != obj->prompt_buf)
free(obj->prompt);
obj->prompt = obj->prompt_buf;
}
} else if (decode_percent(buf)) {
obj->percent = atoi(buf);
}
} else {
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if (feof(dialog_state.pipe_input) ||
(ferror(dialog_state.pipe_input) && errno != EINTR)) {
delink(obj);
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dlg_remove_callback(cb);
}
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}
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if (status > 0) {
result = TRUE;
repaint_text(obj);
} else {
result = FALSE;
}
return result;
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}
static bool
handle_my_getc(DIALOG_CALLBACK * cb, int ch, int fkey, int *result)
{
int status = TRUE;
*result = DLG_EXIT_OK;
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if (cb != 0) {
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if (!fkey && (ch == ERR)) {
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(void) handle_input(cb);
/* cb might be freed in handle_input */
status = (valid((MY_OBJ *) cb) && (cb->input != 0));
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}
} else {
status = FALSE;
}
return status;
}
static void
my_cleanup(DIALOG_CALLBACK * cb)
{
MY_OBJ *obj = (MY_OBJ *) cb;
if (valid(obj)) {
if (obj->prompt != obj->prompt_buf) {
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free(obj->prompt);
obj->prompt = obj->prompt_buf;
}
delink(obj);
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}
}
void
dlg_update_gauge(void *objptr, int percent)
{
MY_OBJ *obj = (MY_OBJ *) objptr;
bool save_finish_string = dialog_state.finish_string;
dialog_state.finish_string = TRUE;
curs_set(0);
obj->percent = percent;
repaint_text(obj);
dialog_state.finish_string = save_finish_string;
}
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/*
* (Re)Allocates an object and fills it as per the arguments
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*/
void *
dlg_reallocate_gauge(void *objptr,
const char *title,
const char *cprompt,
int height,
int width,
int percent)
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{
char *prompt = dlg_strclone(cprompt);
MY_OBJ *obj = objptr;
bool save_finish_string = dialog_state.finish_string;
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dialog_state.finish_string = TRUE;
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dlg_tab_correct_str(prompt);
if (objptr == 0) {
/* create a new object */
obj = dlg_calloc(MY_OBJ, 1);
assert_ptr(obj, "dialog_gauge");
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dlg_auto_size(title, prompt, &height, &width, MIN_HIGH, MIN_WIDE);
dlg_print_size(height, width);
dlg_ctl_size(height, width);
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} else {
/* reuse an existing object */
obj = objptr;
height = obj->height;
width = obj->width;
}
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if (obj->obj.win == 0) {
/* center dialog box on screen */
int x = dlg_box_x_ordinate(width);
int y = dlg_box_y_ordinate(height);
WINDOW *dialog = dlg_new_window(height, width, y, x);
obj->obj.win = dialog;
}
obj->obj.input = dialog_state.pipe_input;
obj->obj.keep_win = TRUE;
obj->obj.bg_task = TRUE;
obj->obj.handle_getc = handle_my_getc;
obj->obj.handle_input = handle_input;
if (obj->title == 0 || strcmp(obj->title, title)) {
dlg_finish_string(obj->title);
free(obj->title);
obj->title = dlg_strclone(title);
}
dlg_finish_string(obj->prompt);
free(obj->prompt);
obj->prompt = prompt;
obj->percent = percent;
obj->height = height;
obj->width = width;
/* if this was a new object, link it into the list */
if (objptr == 0) {
obj->next = all_objects;
all_objects = obj;
}
dialog_state.finish_string = save_finish_string;
return (void *) obj;
}
void *
dlg_allocate_gauge(const char *title,
const char *cprompt,
int height,
int width,
int percent)
{
return dlg_reallocate_gauge(NULL, title, cprompt, height, width, percent);
}
void
dlg_free_gauge(void *objptr)
{
MY_OBJ *obj = (MY_OBJ *) objptr;
curs_set(1);
if (valid(obj)) {
delink(obj);
obj->obj.keep_win = FALSE;
dlg_remove_callback(&(obj->obj));
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}
}
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/*
* Display a gauge, or progress meter. Starts at percent% and reads stdin. If
* stdin is not XXX, then it is interpreted as a percentage, and the display is
* updated accordingly. Otherwise the next line is the percentage, and
* subsequent lines up to another XXX are used for the new prompt. Note that
* the size of the window never changes, so the prompt can not get any larger
* than the height and width specified.
*/
int
dialog_gauge(const char *title,
const char *cprompt,
int height,
int width,
int percent)
{
int fkey;
int ch, result;
void *objptr = dlg_allocate_gauge(title, cprompt, height, width, percent);
MY_OBJ *obj = (MY_OBJ *) objptr;
dlg_add_callback_ref((DIALOG_CALLBACK **) & obj, my_cleanup);
dlg_update_gauge(obj, percent);
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dlg_trace_win(obj->obj.win);
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do {
ch = dlg_getc(obj->obj.win, &fkey);
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#ifdef KEY_RESIZE
if (fkey && ch == KEY_RESIZE) {
MY_OBJ *oldobj = obj;
dlg_mouse_free_regions();
obj = dlg_allocate_gauge(title,
cprompt,
height,
width,
oldobj->percent);
/* avoid breaking new window in dlg_remove_callback */
oldobj->obj.caller = 0;
oldobj->obj.input = 0;
oldobj->obj.keep_win = FALSE;
/* remove the old version of the gauge */
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dlg_clear();
dlg_remove_callback(&(oldobj->obj));
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refresh();
dlg_add_callback_ref((DIALOG_CALLBACK **) & obj, my_cleanup);
dlg_update_gauge(obj, obj->percent);
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}
#endif
}
while (valid(obj) && handle_my_getc(&(obj->obj), ch, fkey, &result));
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dlg_free_gauge(obj);
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return (DLG_EXIT_OK);
}