mirror of
https://gitlab.gnome.org/GNOME/gimp.git
synced 2025-07-04 09:53:25 +00:00
8005eea835
because it confuses gtk-doc and breaks some links. Also change the "Index of new symbols in GIMP 2.x" sections to be what seems to be the modern standard (looked at the GLib and GTK+ docs), and update some other stuff.
590 lines
17 KiB
C
590 lines
17 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimpvaluearray.c ported from GValueArray
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <glib-object.h>
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#include "gimpbasetypes.h"
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#include "gimpvaluearray.h"
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/**
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* SECTION:gimpvaluearray
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* @short_description: A container structure to maintain an array of
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* generic values
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* @see_also: #GValue, #GParamSpecValueArray, gimp_param_spec_value_array()
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* @title: GimpValueArray
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*
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* The prime purpose of a #GimpValueArray is for it to be used as an
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* object property that holds an array of values. A #GimpValueArray wraps
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* an array of #GValue elements in order for it to be used as a boxed
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* type through %GIMP_TYPE_VALUE_ARRAY.
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*/
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#define GROUP_N_VALUES (1) /* power of 2 !! */
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/**
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* GimpValueArray:
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*
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* A #GimpValueArray contains an array of #GValue elements.
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*
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* Since: 2.10
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*/
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struct _GimpValueArray
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{
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gint n_values;
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GValue *values;
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gint n_prealloced;
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gint ref_count;
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};
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G_DEFINE_BOXED_TYPE (GimpValueArray, gimp_value_array,
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gimp_value_array_ref, gimp_value_array_unref)
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/**
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* gimp_value_array_index:
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* @value_array: #GimpValueArray to get a value from
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* @index: index of the value of interest
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*
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* Return a pointer to the value at @index containd in @value_array.
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*
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* Returns: (transfer none): pointer to a value at @index in @value_array
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*
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* Since: 2.10
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*/
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GValue *
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gimp_value_array_index (const GimpValueArray *value_array,
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gint index)
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{
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g_return_val_if_fail (value_array != NULL, NULL);
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g_return_val_if_fail (index < value_array->n_values, NULL);
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return value_array->values + index;
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}
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static inline void
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value_array_grow (GimpValueArray *value_array,
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gint n_values,
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gboolean zero_init)
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{
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g_return_if_fail ((guint) n_values >= (guint) value_array->n_values);
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value_array->n_values = n_values;
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if (value_array->n_values > value_array->n_prealloced)
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{
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gint i = value_array->n_prealloced;
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value_array->n_prealloced = (value_array->n_values + GROUP_N_VALUES - 1) & ~(GROUP_N_VALUES - 1);
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value_array->values = g_renew (GValue, value_array->values, value_array->n_prealloced);
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if (!zero_init)
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i = value_array->n_values;
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memset (value_array->values + i, 0,
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(value_array->n_prealloced - i) * sizeof (value_array->values[0]));
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}
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}
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static inline void
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value_array_shrink (GimpValueArray *value_array)
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{
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if (value_array->n_prealloced >= value_array->n_values + GROUP_N_VALUES)
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{
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value_array->n_prealloced = (value_array->n_values + GROUP_N_VALUES - 1) & ~(GROUP_N_VALUES - 1);
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value_array->values = g_renew (GValue, value_array->values, value_array->n_prealloced);
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}
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}
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/**
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* gimp_value_array_new:
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* @n_prealloced: number of values to preallocate space for
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*
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* Allocate and initialize a new #GimpValueArray, optionally preserve space
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* for @n_prealloced elements. New arrays always contain 0 elements,
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* regardless of the value of @n_prealloced.
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*
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* Returns: a newly allocated #GimpValueArray with 0 values
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_new (gint n_prealloced)
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{
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GimpValueArray *value_array = g_slice_new (GimpValueArray);
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value_array->n_values = 0;
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value_array->n_prealloced = 0;
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value_array->values = NULL;
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value_array_grow (value_array, n_prealloced, TRUE);
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value_array->n_values = 0;
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value_array->ref_count = 1;
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return value_array;
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}
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/**
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* gimp_value_array_ref:
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* @value_array: #GimpValueArray to ref
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*
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* Adds a reference to a #GimpValueArray.
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*
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* Return value: the same @value_array
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_ref (GimpValueArray *value_array)
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{
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g_return_val_if_fail (value_array != NULL, NULL);
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value_array->ref_count++;
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return value_array;
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}
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/**
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* gimp_value_array_unref:
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* @value_array: #GimpValueArray to unref
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*
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* Unref a #GimpValueArray. If the reference count drops to zero, the
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* array including its contents are freed.
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*
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* Since: 2.10
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*/
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void
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gimp_value_array_unref (GimpValueArray *value_array)
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{
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g_return_if_fail (value_array != NULL);
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value_array->ref_count--;
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if (value_array->ref_count < 1)
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{
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gint i;
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for (i = 0; i < value_array->n_values; i++)
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{
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GValue *value = value_array->values + i;
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if (G_VALUE_TYPE (value) != 0) /* we allow unset values in the array */
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g_value_unset (value);
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}
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g_free (value_array->values);
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g_slice_free (GimpValueArray, value_array);
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}
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}
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gint
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gimp_value_array_length (const GimpValueArray *value_array)
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{
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g_return_val_if_fail (value_array != NULL, 0);
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return value_array->n_values;
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}
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/**
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* gimp_value_array_prepend:
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* @value_array: #GimpValueArray to add an element to
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* @value: (allow-none): #GValue to copy into #GimpValueArray, or %NULL
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*
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* Insert a copy of @value as first element of @value_array. If @value is
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* %NULL, an uninitialized value is prepended.
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*
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* Returns: (transfer none): the #GimpValueArray passed in as @value_array
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_prepend (GimpValueArray *value_array,
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const GValue *value)
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{
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g_return_val_if_fail (value_array != NULL, NULL);
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return gimp_value_array_insert (value_array, 0, value);
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}
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/**
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* gimp_value_array_append:
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* @value_array: #GimpValueArray to add an element to
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* @value: (allow-none): #GValue to copy into #GimpValueArray, or %NULL
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*
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* Insert a copy of @value as last element of @value_array. If @value is
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* %NULL, an uninitialized value is appended.
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*
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* Returns: (transfer none): the #GimpValueArray passed in as @value_array
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_append (GimpValueArray *value_array,
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const GValue *value)
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{
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g_return_val_if_fail (value_array != NULL, NULL);
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return gimp_value_array_insert (value_array, value_array->n_values, value);
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}
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/**
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* gimp_value_array_insert:
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* @value_array: #GimpValueArray to add an element to
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* @index: insertion position, must be <= gimp_value_array_length()
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* @value: (allow-none): #GValue to copy into #GimpValueArray, or %NULL
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*
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* Insert a copy of @value at specified position into @value_array. If @value
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* is %NULL, an uninitialized value is inserted.
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*
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* Returns: (transfer none): the #GimpValueArray passed in as @value_array
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_insert (GimpValueArray *value_array,
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gint index,
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const GValue *value)
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{
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gint i;
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g_return_val_if_fail (value_array != NULL, NULL);
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g_return_val_if_fail (index <= value_array->n_values, value_array);
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i = value_array->n_values;
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value_array_grow (value_array, value_array->n_values + 1, FALSE);
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if (index + 1 < value_array->n_values)
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memmove (value_array->values + index + 1, value_array->values + index,
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(i - index) * sizeof (value_array->values[0]));
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memset (value_array->values + index, 0, sizeof (value_array->values[0]));
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if (value)
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{
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g_value_init (value_array->values + index, G_VALUE_TYPE (value));
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g_value_copy (value, value_array->values + index);
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}
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return value_array;
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}
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/**
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* gimp_value_array_remove:
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* @value_array: #GimpValueArray to remove an element from
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* @index: position of value to remove, which must be less than
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* gimp_value_array_length()
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*
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* Remove the value at position @index from @value_array.
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*
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* Returns: (transfer none): the #GimpValueArray passed in as @value_array
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*
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* Since: 2.10
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*/
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GimpValueArray *
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gimp_value_array_remove (GimpValueArray *value_array,
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gint index)
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{
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g_return_val_if_fail (value_array != NULL, NULL);
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g_return_val_if_fail (index < value_array->n_values, value_array);
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if (G_VALUE_TYPE (value_array->values + index) != 0)
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g_value_unset (value_array->values + index);
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value_array->n_values--;
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if (index < value_array->n_values)
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memmove (value_array->values + index, value_array->values + index + 1,
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(value_array->n_values - index) * sizeof (value_array->values[0]));
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value_array_shrink (value_array);
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if (value_array->n_prealloced > value_array->n_values)
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memset (value_array->values + value_array->n_values, 0, sizeof (value_array->values[0]));
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return value_array;
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}
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void
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gimp_value_array_truncate (GimpValueArray *value_array,
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gint n_values)
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{
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gint i;
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g_return_if_fail (value_array != NULL);
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g_return_if_fail (n_values > 0 && n_values <= value_array->n_values);
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for (i = value_array->n_values; i > n_values; i--)
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gimp_value_array_remove (value_array, i - 1);
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}
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/*
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* GIMP_TYPE_PARAM_VALUE_ARRAY
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*/
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static void gimp_param_value_array_class_init (GParamSpecClass *klass);
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static void gimp_param_value_array_init (GParamSpec *pspec);
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static void gimp_param_value_array_finalize (GParamSpec *pspec);
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static void gimp_param_value_array_set_default (GParamSpec *pspec,
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GValue *value);
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static gboolean gimp_param_value_array_validate (GParamSpec *pspec,
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GValue *value);
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static gint gimp_param_value_array_values_cmp (GParamSpec *pspec,
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const GValue *value1,
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const GValue *value2);
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GType
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gimp_param_value_array_get_type (void)
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{
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static GType type = 0;
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if (! type)
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{
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const GTypeInfo info =
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{
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sizeof (GParamSpecClass),
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NULL, NULL,
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(GClassInitFunc) gimp_param_value_array_class_init,
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NULL, NULL,
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sizeof (GimpParamSpecValueArray),
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0,
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(GInstanceInitFunc) gimp_param_value_array_init
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};
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type = g_type_register_static (G_TYPE_PARAM_BOXED,
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"GimpParamValueArray", &info, 0);
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}
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return type;
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}
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static void
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gimp_param_value_array_class_init (GParamSpecClass *klass)
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{
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klass->value_type = GIMP_TYPE_VALUE_ARRAY;
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klass->finalize = gimp_param_value_array_finalize;
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klass->value_set_default = gimp_param_value_array_set_default;
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klass->value_validate = gimp_param_value_array_validate;
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klass->values_cmp = gimp_param_value_array_values_cmp;
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}
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static void
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gimp_param_value_array_init (GParamSpec *pspec)
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{
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GimpParamSpecValueArray *aspec = GIMP_PARAM_SPEC_VALUE_ARRAY (pspec);
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aspec->element_spec = NULL;
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aspec->fixed_n_elements = 0; /* disable */
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}
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static inline guint
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gimp_value_array_ensure_size (GimpValueArray *value_array,
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guint fixed_n_elements)
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{
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guint changed = 0;
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if (fixed_n_elements)
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{
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while (gimp_value_array_length (value_array) < fixed_n_elements)
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{
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gimp_value_array_append (value_array, NULL);
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changed++;
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}
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while (gimp_value_array_length (value_array) > fixed_n_elements)
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{
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gimp_value_array_remove (value_array,
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gimp_value_array_length (value_array) - 1);
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changed++;
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}
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}
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return changed;
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}
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static void
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gimp_param_value_array_finalize (GParamSpec *pspec)
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{
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GimpParamSpecValueArray *aspec = GIMP_PARAM_SPEC_VALUE_ARRAY (pspec);
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GParamSpecClass *parent_class = g_type_class_peek (g_type_parent (GIMP_TYPE_PARAM_VALUE_ARRAY));
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if (aspec->element_spec)
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{
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g_param_spec_unref (aspec->element_spec);
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aspec->element_spec = NULL;
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}
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parent_class->finalize (pspec);
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}
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static void
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gimp_param_value_array_set_default (GParamSpec *pspec,
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GValue *value)
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{
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GimpParamSpecValueArray *aspec = GIMP_PARAM_SPEC_VALUE_ARRAY (pspec);
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if (!value->data[0].v_pointer && aspec->fixed_n_elements)
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value->data[0].v_pointer = gimp_value_array_new (aspec->fixed_n_elements);
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if (value->data[0].v_pointer)
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{
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/* g_value_reset (value); already done */
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gimp_value_array_ensure_size (value->data[0].v_pointer,
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aspec->fixed_n_elements);
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}
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}
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static gboolean
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gimp_param_value_array_validate (GParamSpec *pspec,
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GValue *value)
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{
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GimpParamSpecValueArray *aspec = GIMP_PARAM_SPEC_VALUE_ARRAY (pspec);
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GimpValueArray *value_array = value->data[0].v_pointer;
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guint changed = 0;
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if (!value->data[0].v_pointer && aspec->fixed_n_elements)
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value->data[0].v_pointer = gimp_value_array_new (aspec->fixed_n_elements);
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if (value->data[0].v_pointer)
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{
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/* ensure array size validity */
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changed += gimp_value_array_ensure_size (value_array,
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aspec->fixed_n_elements);
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/* ensure array values validity against a present element spec */
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if (aspec->element_spec)
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{
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GParamSpec *element_spec = aspec->element_spec;
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gint length = gimp_value_array_length (value_array);
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gint i;
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for (i = 0; i < length; i++)
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{
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GValue *element = gimp_value_array_index (value_array, i);
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/* need to fixup value type, or ensure that the array
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* value is initialized at all
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*/
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if (! g_value_type_compatible (G_VALUE_TYPE (element),
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G_PARAM_SPEC_VALUE_TYPE (element_spec)))
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{
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if (G_VALUE_TYPE (element) != 0)
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g_value_unset (element);
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g_value_init (element, G_PARAM_SPEC_VALUE_TYPE (element_spec));
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g_param_value_set_default (element_spec, element);
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changed++;
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}
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/* validate array value against element_spec */
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changed += g_param_value_validate (element_spec, element);
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}
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}
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}
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return changed;
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}
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static gint
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gimp_param_value_array_values_cmp (GParamSpec *pspec,
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const GValue *value1,
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const GValue *value2)
|
|
{
|
|
GimpParamSpecValueArray *aspec = GIMP_PARAM_SPEC_VALUE_ARRAY (pspec);
|
|
GimpValueArray *value_array1 = value1->data[0].v_pointer;
|
|
GimpValueArray *value_array2 = value2->data[0].v_pointer;
|
|
gint length1;
|
|
gint length2;
|
|
|
|
if (!value_array1 || !value_array2)
|
|
return value_array2 ? -1 : value_array1 != value_array2;
|
|
|
|
length1 = gimp_value_array_length (value_array1);
|
|
length2 = gimp_value_array_length (value_array2);
|
|
|
|
if (length1 != length2)
|
|
{
|
|
return length1 < length2 ? -1 : 1;
|
|
}
|
|
else if (! aspec->element_spec)
|
|
{
|
|
/* we need an element specification for comparisons, so there's
|
|
* not much to compare here, try to at least provide stable
|
|
* lesser/greater result
|
|
*/
|
|
return length1 < length2 ? -1 : length1 > length2;
|
|
}
|
|
else /* length1 == length2 */
|
|
{
|
|
guint i;
|
|
|
|
for (i = 0; i < length1; i++)
|
|
{
|
|
GValue *element1 = gimp_value_array_index (value_array1, i);
|
|
GValue *element2 = gimp_value_array_index (value_array2, i);
|
|
gint cmp;
|
|
|
|
/* need corresponding element types, provide stable result
|
|
* otherwise
|
|
*/
|
|
if (G_VALUE_TYPE (element1) != G_VALUE_TYPE (element2))
|
|
return G_VALUE_TYPE (element1) < G_VALUE_TYPE (element2) ? -1 : 1;
|
|
|
|
cmp = g_param_values_cmp (aspec->element_spec, element1, element2);
|
|
if (cmp)
|
|
return cmp;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
GParamSpec *
|
|
gimp_param_spec_value_array (const gchar *name,
|
|
const gchar *nick,
|
|
const gchar *blurb,
|
|
GParamSpec *element_spec,
|
|
GParamFlags flags)
|
|
{
|
|
GimpParamSpecValueArray *aspec;
|
|
|
|
if (element_spec)
|
|
g_return_val_if_fail (G_IS_PARAM_SPEC (element_spec), NULL);
|
|
|
|
aspec = g_param_spec_internal (GIMP_TYPE_PARAM_VALUE_ARRAY,
|
|
name,
|
|
nick,
|
|
blurb,
|
|
flags);
|
|
if (element_spec)
|
|
{
|
|
aspec->element_spec = g_param_spec_ref (element_spec);
|
|
g_param_spec_sink (element_spec);
|
|
}
|
|
|
|
return G_PARAM_SPEC (aspec);
|
|
}
|