/* Copyright (C) 2002 Bjoern Beutel. */
/* Description. =============================================================*/
/* Read in and display Malaga Variables. */
/* Includes. ================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <setjmp.h>
#include <string.h>
#include <gtk/gtk.h>
#include <glib.h>
#include "basic.h"
#include "scanner.h"
#include "input.h"
#include "canvas.h"
#include "variables.h"
/* Types. ===================================================================*/
typedef struct
{
list_node_t *next;
string_t string;
pos_string_t *name;
pos_value_t *value;
bool_t is_shown;
} variable_t;
typedef struct
{
list_node_t *next;
string_t name;
} hidden_var_t;
/* Global variables. ========================================================*/
rectangle_t variables_geometry;
string_t variables_font_family;
int_t variables_font_size;
/* Variables. ===============================================================*/
static list_t variables;
static list_t hidden_vars;
static canvas_t *variables_canvas;
static pos_string_t *equal, *dots;
/* Functions. ===============================================================*/
static void
configure_variables( canvas_t *canvas, int_t *width_p, int_t *height_p )
{
int_t width, height;
variable_t *variable;
int_t font_height = get_font_height( canvas );
int_t space_width = get_space_width( canvas );
int_t border_width = get_border_width( canvas );
config_pos_string( equal, canvas );
config_pos_string( dots, canvas );
width = height = border_width;
FOREACH( variable, variables )
{
if (variable != (variable_t *) variables.first)
height += font_height;
config_pos_string( variable->name, canvas );
variable->name->x = border_width;
variable->name->y = height;
equal->x = variable->name->x + variable->name->width + space_width;
if (variable->is_shown)
{
config_pos_value( variable->value, canvas );
variable->value->x = equal->x + equal->width + space_width;
variable->value->y = height;
variable->name->y += (variable->value->height - font_height) / 2;
width = MAX( width, variable->value->x + variable->value->width );
height += variable->value->height;
}
else
{
dots->x = equal->x + equal->width + space_width;
width = MAX( width, dots->x + dots->width );
height += font_height;
}
}
*width_p = width + border_width;
*height_p = height + border_width;
}
/*---------------------------------------------------------------------------*/
static void
expose_variables( canvas_t *canvas, rectangle_t *area )
{
int_t space_width = get_space_width( canvas );
variable_t *variable;
set_color( BLACK );
FOREACH( variable, variables )
{
draw_pos_string( variable->name, canvas );
equal->x = variable->name->x + variable->name->width + space_width;
equal->y = variable->name->y;
draw_pos_string( equal, canvas );
if (variable->is_shown)
draw_pos_value( variable->value, canvas );
else
{
dots->x = equal->x + equal->width + space_width;
dots->y = equal->y;
draw_pos_string( dots, canvas );
}
}
}
/*---------------------------------------------------------------------------*/
static void
show_variable( variable_t *variable, bool_t do_show )
{
hidden_var_t *hidden_var;
if (variable->is_shown == do_show)
return;
if (do_show)
{
/* Remove the variable in the list of hidden variables. */
FOREACH( hidden_var, hidden_vars )
{
if (strcmp_no_case( hidden_var->name, variable->string ) == 0)
break;
}
free_mem( &hidden_var->name );
free_node( &hidden_vars, (list_node_t *) hidden_var );
}
else
{
/* Add the variable to the list of hidden variables. */
hidden_var = new_node( &hidden_vars, sizeof( hidden_var_t ), LIST_END );
hidden_var->name = new_string( variable->string, NULL );
}
variable->is_shown = do_show;
}
/*---------------------------------------------------------------------------*/
static bool_t
mouse_event( canvas_t *canvas, int_t x, int_t y, int_t button )
/* Called if pointer has entered CANVAS at position (X,Y),
* if mouse has been moved to position (X,Y),
* or if BUTTON has been pressed at position (X,Y). */
{
variable_t *variable;
int_t font_height = get_font_height( canvas );
FOREACH( variable, variables )
{
if (x >= variable->name->x && x < variable->name->x + variable->name->width
&& y >= variable->name->y && y < variable->name->y + font_height)
{
if (button != 0)
{
show_variable( variable, ! variable->is_shown );
configure_canvas( canvas );
}
else
set_cursor( canvas, TRUE );
return TRUE;
}
}
set_cursor( canvas, FALSE );
return FALSE;
}
/*---------------------------------------------------------------------------*/
static void
show_all_variables( canvas_t *canvas, guint do_show )
{
variable_t *variable;
FOREACH( variable, variables )
show_variable( variable, do_show );
configure_canvas( canvas );
}
/*---------------------------------------------------------------------------*/
static GtkItemFactoryEntry menu_items[] =
{
{ "/Variables", NULL, NULL, 0, "<Branch>" },
{ "/Variables/Show All", NULL, show_all_variables, TRUE, NULL },
{ "/Variables/Hide All", NULL, show_all_variables, FALSE, NULL },
};
/*---------------------------------------------------------------------------*/
static void free_variables( canvas_t *canvas )
{
variable_t *variable;
free_pos_string( &equal );
free_pos_string( &dots );
FOREACH_FREE( variable, variables )
{
free_mem( &variable->string );
free_pos_string( &variable->name );
free_pos_value( &variable->value );
}
}
/*---------------------------------------------------------------------------*/
void
read_variables( void )
/* Read new variables from STDIN. */
{
string_t line;
variable_t *variable;
hidden_var_t *hidden_var;
free_variables( NULL );
while (TRUE)
{
line = read_line( stdin );
if (line == NULL)
complain( "Premature EOF." );
if (strcmp_no_case( line, "end" ) == 0)
break;
/* Read a new variable. */
variable = new_node( &variables, sizeof( variable_t ), LIST_END );
set_scanner_input( line );
/* Read variable name. */
test_token( TOK_STRING );
variable->name = new_pos_string( token_string );
variable->string = new_string( token_string, NULL );
read_next_token();
/* Read variable value. */
parse_token( '{' );
variable->value = parse_pos_value();
parse_token( '}' );
parse_token( EOF );
set_scanner_input( NULL );
free_mem( &line );
/* Check if variable is to be shown. */
FOREACH( hidden_var, hidden_vars )
{
if (strcmp_no_case( hidden_var->name, variable->string ) == 0)
break;
}
variable->is_shown = (hidden_var == NULL);
}
free_mem( &line );
equal = new_pos_string( "=" );
dots = new_pos_string( "..." );
if (variables_canvas == NULL)
{
variables_canvas = create_canvas(
"Malaga Variables", "variables.eps", &variables_geometry,
configure_variables, expose_variables, free_variables, mouse_event,
TRUE, menu_items, ARRAY_LENGTH( menu_items ) );
}
else
{
configure_canvas( variables_canvas );
show_canvas( variables_canvas );
}
}
/* End of file. =============================================================*/