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/* gtkconstraintequationprivate.h: Constraint expressions and variables
* Copyright 2019 GNOME Foundation
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Emmanuele Bassi
*/
#pragma once
#include "gtkconstrainttypesprivate.h"
G_BEGIN_DECLS
GtkConstraintVariable *
gtk_constraint_variable_new (const char *prefix,
const char *name);
GtkConstraintVariable *
gtk_constraint_variable_new_dummy (const char *name);
GtkConstraintVariable *
gtk_constraint_variable_new_objective (const char *name);
GtkConstraintVariable *
gtk_constraint_variable_new_slack (const char *name);
GtkConstraintVariable *
gtk_constraint_variable_ref (GtkConstraintVariable *variable);
void
gtk_constraint_variable_unref (GtkConstraintVariable *variable);
void
gtk_constraint_variable_set_value (GtkConstraintVariable *variable,
double value);
double
gtk_constraint_variable_get_value (const GtkConstraintVariable *variable);
char *
gtk_constraint_variable_to_string (const GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_is_external (const GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_is_pivotable (const GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_is_restricted (const GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_is_dummy (const GtkConstraintVariable *variable);
typedef struct {
GtkConstraintVariable *first;
GtkConstraintVariable *second;
} GtkConstraintVariablePair;
GtkConstraintVariablePair *
gtk_constraint_variable_pair_new (GtkConstraintVariable *first,
GtkConstraintVariable *second);
void
gtk_constraint_variable_pair_free (GtkConstraintVariablePair *pair);
typedef struct _GtkConstraintVariableSet GtkConstraintVariableSet;
GtkConstraintVariableSet *
gtk_constraint_variable_set_new (void);
void
gtk_constraint_variable_set_free (GtkConstraintVariableSet *set);
gboolean
gtk_constraint_variable_set_add (GtkConstraintVariableSet *set,
GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_set_remove (GtkConstraintVariableSet *set,
GtkConstraintVariable *variable);
gboolean
gtk_constraint_variable_set_is_empty (GtkConstraintVariableSet *set);
gboolean
gtk_constraint_variable_set_is_singleton (GtkConstraintVariableSet *set);
int
gtk_constraint_variable_set_size (GtkConstraintVariableSet *set);
typedef struct {
/*< private >*/
gpointer dummy1;
gpointer dummy2;
gint64 dummy3;
} GtkConstraintVariableSetIter;
void
gtk_constraint_variable_set_iter_init (GtkConstraintVariableSetIter *iter,
GtkConstraintVariableSet *set);
gboolean
gtk_constraint_variable_set_iter_next (GtkConstraintVariableSetIter *iter,
GtkConstraintVariable **variable_p);
GtkConstraintExpression *
gtk_constraint_expression_new (double constant);
GtkConstraintExpression *
gtk_constraint_expression_new_from_variable (GtkConstraintVariable *variable);
GtkConstraintExpression *
gtk_constraint_expression_ref (GtkConstraintExpression *expression);
void
gtk_constraint_expression_unref (GtkConstraintExpression *expression);
GtkConstraintExpression *
gtk_constraint_expression_clone (GtkConstraintExpression *expression);
void
gtk_constraint_expression_set_constant (GtkConstraintExpression *expression,
double constant);
double
gtk_constraint_expression_get_constant (const GtkConstraintExpression *expression);
gboolean
gtk_constraint_expression_is_constant (const GtkConstraintExpression *expression);
void
gtk_constraint_expression_add_expression (GtkConstraintExpression *a_expr,
GtkConstraintExpression *b_expr,
double n,
GtkConstraintVariable *subject,
GtkConstraintSolver *solver);
void
gtk_constraint_expression_add_variable (GtkConstraintExpression *expression,
GtkConstraintVariable *variable,
double coefficient,
GtkConstraintVariable *subject,
GtkConstraintSolver *solver);
void
gtk_constraint_expression_remove_variable (GtkConstraintExpression *expression,
GtkConstraintVariable *variable);
void
gtk_constraint_expression_set_variable (GtkConstraintExpression *expression,
GtkConstraintVariable *variable,
double coefficient);
double
gtk_constraint_expression_get_coefficient (GtkConstraintExpression *expression,
GtkConstraintVariable *variable);
char *
gtk_constraint_expression_to_string (const GtkConstraintExpression *expression);
double
gtk_constraint_expression_new_subject (GtkConstraintExpression *expression,
GtkConstraintVariable *subject);
void
gtk_constraint_expression_change_subject (GtkConstraintExpression *expression,
GtkConstraintVariable *old_subject,
GtkConstraintVariable *new_subject);
void
gtk_constraint_expression_substitute_out (GtkConstraintExpression *expression,
GtkConstraintVariable *out_var,
GtkConstraintExpression *expr,
GtkConstraintVariable *subject,
GtkConstraintSolver *solver);
GtkConstraintVariable *
gtk_constraint_expression_get_pivotable_variable (GtkConstraintExpression *expression);
GtkConstraintExpression *
gtk_constraint_expression_plus_constant (GtkConstraintExpression *expression,
double constant);
GtkConstraintExpression *
gtk_constraint_expression_minus_constant (GtkConstraintExpression *expression,
double constant);
GtkConstraintExpression *
gtk_constraint_expression_plus_variable (GtkConstraintExpression *expression,
GtkConstraintVariable *variable);
GtkConstraintExpression *
gtk_constraint_expression_minus_variable (GtkConstraintExpression *expression,
GtkConstraintVariable *variable);
GtkConstraintExpression *
gtk_constraint_expression_multiply_by (GtkConstraintExpression *expression,
double factor);
GtkConstraintExpression *
gtk_constraint_expression_divide_by (GtkConstraintExpression *expression,
double factor);
struct _GtkConstraintExpressionBuilder
{
/*< private >*/
gpointer dummy1;
gpointer dummy2;
int dummy3;
};
void
gtk_constraint_expression_builder_init (GtkConstraintExpressionBuilder *builder,
GtkConstraintSolver *solver);
void
gtk_constraint_expression_builder_term (GtkConstraintExpressionBuilder *builder,
GtkConstraintVariable *term);
void
gtk_constraint_expression_builder_plus (GtkConstraintExpressionBuilder *builder);
void
gtk_constraint_expression_builder_minus (GtkConstraintExpressionBuilder *builder);
void
gtk_constraint_expression_builder_divide_by (GtkConstraintExpressionBuilder *builder);
void
gtk_constraint_expression_builder_multiply_by (GtkConstraintExpressionBuilder *builder);
void
gtk_constraint_expression_builder_constant (GtkConstraintExpressionBuilder *builder,
double value);
GtkConstraintExpression *
gtk_constraint_expression_builder_finish (GtkConstraintExpressionBuilder *builder) G_GNUC_WARN_UNUSED_RESULT;
/*< private >
* GtkConstraintExpressionIter:
*
* An iterator object for terms inside a `GtkConstraintExpression`.
*/
typedef struct {
/*< private >*/
gpointer dummy1;
gpointer dummy2;
gint64 dummy3;
} GtkConstraintExpressionIter;
void
gtk_constraint_expression_iter_init (GtkConstraintExpressionIter *iter,
GtkConstraintExpression *equation);
gboolean
gtk_constraint_expression_iter_next (GtkConstraintExpressionIter *iter,
GtkConstraintVariable **variable,
double *coefficient);
gboolean
gtk_constraint_expression_iter_prev (GtkConstraintExpressionIter *iter,
GtkConstraintVariable **variable,
double *coefficient);
G_END_DECLS
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