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/* $Id$
* $URL$
*
* generic widget handling
*
* Copyright (C) 2003, 2004 Michael Reinelt <michael@reinelt.co.at>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* exported functions:
*
* int widget_junk(void)
* does something
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "debug.h"
#include "cfg.h"
#include "widget.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
/* we use a static array of widgets and not realloc() */
#define MAX_WIDGETS 256
static WIDGET_CLASS *Classes = NULL;
static int nClasses = 0;
static WIDGET *Widgets = NULL;
static int nWidgets = 0;
static int widget_added = 0;
int widget_register(WIDGET_CLASS * widget)
{
int i;
/* sanity check: disallow widget registering after at least one */
/* widget has been added, because we use realloc here, and there may */
/* be pointers to the old memory area */
if (widget_added) {
error("internal error: register_widget(%s) after add_widget()", widget->name);
return -1;
}
for (i = 0; i < nClasses; i++) {
if (strcasecmp(widget->name, Classes[i].name) == 0) {
error("internal error: widget '%s' already exists!", widget->name);
return -1;
}
}
nClasses++;
Classes = realloc(Classes, nClasses * sizeof(WIDGET_CLASS));
Classes[nClasses - 1] = *widget;
return 0;
}
void widget_unregister(void)
{
int i;
for (i = 0; i < nWidgets; i++) {
Widgets[i].class->quit(&(Widgets[i]));
if (Widgets[i].name)
free(Widgets[i].name);
}
free(Widgets);
free(Classes);
nWidgets = 0;
nClasses = 0;
}
int widget_color(const char *section, const char *name, const char *key, RGBA * C)
{
char *color;
C->R = 0;
C->G = 0;
C->B = 0;
C->A = 0;
color = cfg_get(section, key, NULL);
if (color == NULL)
return 0;
if (*color == '\0') {
free(color);
return 0;
}
if (color2RGBA(color, C) < 0) {
error("widget '%s': ignoring illegal %s color '%s'", name, key, color);
free(color);
return 0;
}
free(color);
return 1;
}
int intersect(WIDGET * w1, WIDGET * w2)
{
int x1w1, y1w1, x2w1, y2w1; /* 1st rectangle */
int x1w2, y1w2, x2w2, y2w2; /* 2nd rectangle */
if (w1->x2 == NOCOORD || w1->y2 == NOCOORD || w2->x2 == NOCOORD || w2->y2 == NOCOORD) {
/* w1 or w2 is no display widget: no intersection */
return 0;
}
x1w1 = MIN(w1->col, w1->x2);
x2w1 = MAX(w1->col, w1->x2);
y1w1 = MIN(w1->row, w1->y2);
y2w1 = MAX(w1->row, w1->y2);
x1w2 = MIN(w2->col, w2->x2);
x2w2 = MAX(w2->col, w2->x2);
y1w2 = MIN(w2->row, w2->y2);
y2w2 = MAX(w2->row, w2->y2);
if (x1w2 < x2w1 && x2w2 > x1w1 && y1w2 < y2w1 && y2w2 > y1w1) {
/* true: Intersection */
return 1;
} else {
return 0;
}
}
int widget_add(const char *name, const int type, const int layer, const int row, const int col)
{
int i;
char *section;
char *class;
int fg_valid, bg_valid;
RGBA FG, BG;
WIDGET_CLASS *Class;
WIDGET *Widget;
WIDGET *Parent;
/* prepare config section */
/* strlen("Widget:")=7 */
section = malloc(strlen(name) + 8);
strcpy(section, "Widget:");
strcat(section, name);
/* get widget class */
class = cfg_get(section, "class", NULL);
if (class == NULL || *class == '\0') {
error("error: widget '%s' has no class!", name);
if (class)
free(class);
free(section);
return -1;
}
/* get widget foreground color */
fg_valid = widget_color(section, name, "foreground", &FG);
bg_valid = widget_color(section, name, "background", &BG);
free(section);
/* lookup widget class */
Class = NULL;
for (i = 0; i < nClasses; i++) {
if (strcasecmp(class, Classes[i].name) == 0) {
Class = &(Classes[i]);
break;
}
}
if (i == nClasses) {
error("widget '%s': class '%s' not supported", name, class);
if (class)
free(class);
return -1;
}
/* check if widget type matches */
if (Class->type != type) {
error("widget '%s': class '%s' not applicable", name, class);
switch (Class->type) {
case WIDGET_TYPE_RC:
error(" Widgetclass %s is placed by Row/Column", class);
break;
case WIDGET_TYPE_XY:
error(" Widgetclass %s is placed by X/Y", class);
break;
case WIDGET_TYPE_GPO:
case WIDGET_TYPE_TIMER:
case WIDGET_TYPE_KEYPAD:
default:
error(" Widgetclass %s has unknown type %d", class, Class->type);
}
free(class);
return -1;
}
if (class)
free(class);
/* do NOT use realloc here because there may be pointers to the old */
/* memory area, which would point to nowhere if realloc moves the area */
if (Widgets == NULL) {
Widgets = malloc(MAX_WIDGETS * sizeof(WIDGET));
if (Widgets == NULL) {
error("internal error: allocation of widget buffer failed: %s", strerror(errno));
return -1;
}
}
/* another sanity check */
if (nWidgets >= MAX_WIDGETS) {
error("internal error: widget buffer full! Tried to allocate %d widgets (max: %d)", nWidgets, MAX_WIDGETS);
return -1;
}
/* look up parent widget (widget with the same name) */
Parent = NULL;
for (i = 0; i < nWidgets; i++) {
if (strcmp(name, Widgets[i].name) == 0) {
Parent = &(Widgets[i]);
break;
}
}
Widget = &(Widgets[nWidgets]);
nWidgets++;
Widget->name = strdup(name);
Widget->class = Class;
Widget->parent = Parent;
Widget->fg_color = FG;
Widget->bg_color = BG;
Widget->fg_valid = fg_valid;
Widget->bg_valid = bg_valid;
Widget->layer = layer;
Widget->row = row;
Widget->col = col;
if (Class->init != NULL) {
Class->init(Widget);
}
info(" widget '%s': Class '%s', Parent '%s', Layer %d, %s %d, %s %d (to %d,%d)",
name, (NULL == Class) ? "<none>" : Class->name,
(NULL == Parent) ? "<root>" : Parent->name,
layer, (WIDGET_TYPE_XY == Class->type) ? "Y" : "Row", row, (WIDGET_TYPE_XY == Class->type) ? "X" : "Col", col,
Widget->y2, Widget->x2);
/* sanity check: look for overlapping widgets */
for (i = 0; i < nWidgets - 1; i++) {
if (Widgets[i].layer == layer) {
if (intersect(&(Widgets[i]), Widget)) {
info("WARNING widget %s(%i,%i) intersects with %s(%i,%i) on layer %d",
Widgets[i].name, Widgets[i].row, Widgets[i].col, name, row, col, layer);
}
}
}
return 0;
}
/* return the found widget, or else NULL */
WIDGET *widget_find(int type, void *needle)
{
WIDGET *widget = NULL;
int i;
for (i = 0; i < nWidgets; i++) {
widget = &(Widgets[i]);
if (widget->class->type == type) {
if (widget->class->find != NULL && widget->class->find(widget, needle) == 0)
break;
}
widget = NULL;
}
return widget;
}
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