path: root/e-util/e-filter-element.c

/*
 * This program 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 of the License, or (at your option) version 3.
 *
 * 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 the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Not Zed <notzed@lostzed.mmc.com.au>
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <stdlib.h>

#include "e-filter-element.h"
#include "e-filter-part.h"

typedef EFilterElement * (*EFilterElementFunc) (gpointer data);

struct _element_type {
    gchar *name;

    EFilterElementFunc create;
    gpointer data;
};

G_DEFINE_TYPE (
    EFilterElement,
    e_filter_element,
    G_TYPE_OBJECT)

static gboolean
filter_element_validate (EFilterElement *element,
                         EAlert **alert)
{
    return TRUE;
}

static gint
filter_element_eq (EFilterElement *element_a,
                   EFilterElement *element_b)
{
    return (g_strcmp0 (element_a->name, element_b->name) == 0);
}

static void
filter_element_xml_create (EFilterElement *element,
                           xmlNodePtr node)
{
    element->name = (gchar *) xmlGetProp (node, (xmlChar *) "name");
}

static EFilterElement *
filter_element_clone (EFilterElement *element)
{
    EFilterElement *clone;
    xmlNodePtr node;

    clone = g_object_new (G_OBJECT_TYPE (element), NULL);

    node = e_filter_element_xml_encode (element);
    e_filter_element_xml_decode (clone, node);
    xmlFreeNodeList (node);

    return clone;
}

/* This is somewhat hackish, implement all the base cases in here */
#include "e-filter-input.h"
#include "e-filter-option.h"
#include "e-filter-code.h"
#include "e-filter-color.h"
#include "e-filter-datespec.h"
#include "e-filter-int.h"
#include "e-filter-file.h"

static void
filter_element_copy_value (EFilterElement *dst_element,
                           EFilterElement *src_element)
{
    if (E_IS_FILTER_INPUT (src_element)) {
        EFilterInput *src_input;

        src_input = E_FILTER_INPUT (src_element);

        if (E_IS_FILTER_INPUT (dst_element)) {
            EFilterInput *dst_input;

            dst_input = E_FILTER_INPUT (dst_element);

            if (src_input->values)
                e_filter_input_set_value (
                    dst_input,
                    src_input->values->data);

        } else if (E_IS_FILTER_INT (dst_element)) {
            EFilterInt *dst_int;

            dst_int = E_FILTER_INT (dst_element);

            dst_int->val = atoi (src_input->values->data);
        }

    } else if (E_IS_FILTER_COLOR (src_element)) {
        EFilterColor *src_color;

        src_color = E_FILTER_COLOR (src_element);

        if (E_IS_FILTER_COLOR (dst_element)) {
            EFilterColor *dst_color;

            dst_color = E_FILTER_COLOR (dst_element);

            dst_color->color = src_color->color;
        }

    } else if (E_IS_FILTER_DATESPEC (src_element)) {
        EFilterDatespec *src_datespec;

        src_datespec = E_FILTER_DATESPEC (src_element);

        if (E_IS_FILTER_DATESPEC (dst_element)) {
            EFilterDatespec *dst_datespec;

            dst_datespec = E_FILTER_DATESPEC (dst_element);

            dst_datespec->type = src_datespec->type;
            dst_datespec->value = src_datespec->value;
        }

    } else if (E_IS_FILTER_INT (src_element)) {
        EFilterInt *src_int;

        src_int = E_FILTER_INT (src_element);

        if (E_IS_FILTER_INT (dst_element)) {
            EFilterInt *dst_int;

            dst_int = E_FILTER_INT (dst_element);

            dst_int->val = src_int->val;

        } else if (E_IS_FILTER_INPUT (dst_element)) {
            EFilterInput *dst_input;
            gchar *values;

            dst_input = E_FILTER_INPUT (dst_element);

            values = g_strdup_printf ("%d", src_int->val);
            e_filter_input_set_value (dst_input, values);
            g_free (values);
        }

    } else if (E_IS_FILTER_OPTION (src_element)) {
        EFilterOption *src_option;

        src_option = E_FILTER_OPTION (src_element);

        if (E_IS_FILTER_OPTION (dst_element)) {
            EFilterOption *dst_option;

            dst_option = E_FILTER_OPTION (dst_element);

            if (src_option->current)
                e_filter_option_set_current (
                    dst_option,
                    src_option->current->value);
        }
    }
}

static void
filter_element_finalize (GObject *object)
{
    EFilterElement *element = E_FILTER_ELEMENT (object);

    xmlFree (element->name);

    /* Chain up to parent's finalize () method. */
    G_OBJECT_CLASS (e_filter_element_parent_class)->finalize (object);
}

static void
e_filter_element_class_init (EFilterElementClass *class)
{
    GObjectClass *object_class;

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = filter_element_finalize;

    class->validate = filter_element_validate;
    class->eq = filter_element_eq;
    class->xml_create = filter_element_xml_create;
    class->clone = filter_element_clone;
    class->copy_value = filter_element_copy_value;
}

static void
e_filter_element_init (EFilterElement *element)
{
}

/**
 * filter_element_new:
 *
 * Create a new EFilterElement object.
 *
 * Return value: A new #EFilterElement object.
 **/
EFilterElement *
e_filter_element_new (void)
{
    return g_object_new (E_TYPE_FILTER_ELEMENT, NULL);
}

gboolean
e_filter_element_validate (EFilterElement *element,
                           EAlert **alert)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element), FALSE);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_val_if_fail (class->validate != NULL, FALSE);

    return class->validate (element, alert);
}

gint
e_filter_element_eq (EFilterElement *element_a,
                     EFilterElement *element_b)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element_a), FALSE);
    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element_b), FALSE);

    /* The elements must be the same type. */
    if (G_OBJECT_TYPE (element_a) != G_OBJECT_TYPE (element_b))
        return FALSE;

    class = E_FILTER_ELEMENT_GET_CLASS (element_a);
    g_return_val_if_fail (class->eq != NULL, FALSE);

    return class->eq (element_a, element_b);
}

/**
 * filter_element_xml_create:
 * @fe: filter element
 * @node: xml node
 *
 * Create a new filter element based on an xml definition of
 * that element.
 **/
void
e_filter_element_xml_create (EFilterElement *element,
                             xmlNodePtr node)
{
    EFilterElementClass *class;

    g_return_if_fail (E_IS_FILTER_ELEMENT (element));
    g_return_if_fail (node != NULL);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_if_fail (class->xml_create != NULL);

    class->xml_create (element, node);
}

/**
 * filter_element_xml_encode:
 * @fe: filter element
 *
 * Encode the values of a filter element into xml format.
 *
 * Return value:
 **/
xmlNodePtr
e_filter_element_xml_encode (EFilterElement *element)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element), NULL);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_val_if_fail (class->xml_encode != NULL, NULL);

    return class->xml_encode (element);
}

/**
 * filter_element_xml_decode:
 * @fe: filter element
 * @node: xml node
 *
 * Decode the values of a fitler element from xml format.
 *
 * Return value:
 **/
gint
e_filter_element_xml_decode (EFilterElement *element,
                             xmlNodePtr node)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element), FALSE);
    g_return_val_if_fail (node != NULL, FALSE);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_val_if_fail (class->xml_decode != NULL, FALSE);

    return class->xml_decode (element, node);
}

/**
 * filter_element_clone:
 * @fe: filter element
 *
 * Clones the EFilterElement @fe.
 *
 * Return value:
 **/
EFilterElement *
e_filter_element_clone (EFilterElement *element)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element), NULL);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_val_if_fail (class->clone != NULL, NULL);

    return class->clone (element);
}

/**
 * filter_element_get_widget:
 * @fe: filter element
 * @node: xml node
 *
 * Create a widget to represent this element.
 *
 * Return value:
 **/
GtkWidget *
e_filter_element_get_widget (EFilterElement *element)
{
    EFilterElementClass *class;

    g_return_val_if_fail (E_IS_FILTER_ELEMENT (element), NULL);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_val_if_fail (class->get_widget != NULL, NULL);

    return class->get_widget (element);
}

/**
 * filter_element_build_code:
 * @fe: filter element
 * @out: output buffer
 * @ff:
 *
 * Add the code representing this element to the output string @out.
 **/
void
e_filter_element_build_code (EFilterElement *element,
                             GString *out,
                             EFilterPart *part)
{
    EFilterElementClass *class;

    g_return_if_fail (E_IS_FILTER_ELEMENT (element));
    g_return_if_fail (out != NULL);
    g_return_if_fail (E_IS_FILTER_PART (part));

    class = E_FILTER_ELEMENT_GET_CLASS (element);

    /* This method is optional. */
    if (class->build_code != NULL)
        class->build_code (element, out, part);
}

/**
 * filter_element_format_sexp:
 * @fe: filter element
 * @out: output buffer
 *
 * Format the value(s) of this element in a method suitable for the context of
 * sexp where it is used.  Usually as space separated, double-quoted strings.
 **/
void
e_filter_element_format_sexp (EFilterElement *element,
                              GString *out)
{
    EFilterElementClass *class;

    g_return_if_fail (E_IS_FILTER_ELEMENT (element));
    g_return_if_fail (out != NULL);

    class = E_FILTER_ELEMENT_GET_CLASS (element);
    g_return_if_fail (class->format_sexp != NULL);

    class->format_sexp (element, out);
}

void
e_filter_element_set_data (EFilterElement *element,
                           gpointer data)
{
    g_return_if_fail (E_IS_FILTER_ELEMENT (element));

    element->data = data;
}

/* only copies the value, not the name/type */
void
e_filter_element_copy_value (EFilterElement *dst_element,
                             EFilterElement *src_element)
{
    EFilterElementClass *class;

    g_return_if_fail (E_IS_FILTER_ELEMENT (dst_element));
    g_return_if_fail (E_IS_FILTER_ELEMENT (src_element));

    class = E_FILTER_ELEMENT_GET_CLASS (dst_element);
    g_return_if_fail (class->copy_value != NULL);

    class->copy_value (dst_element, src_element);
}