path: root/widgets/misc/e-signature-preview.c

/*
 * e-signature-preview.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include "e-signature-preview.h"

#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <glib/gstdio.h>
#include "e-util/e-signature-utils.h"

enum {
    PROP_0,
    PROP_DISABLE_COMMAND_LINE,
    PROP_SIGNATURE
};

enum {
    REFRESH,
    LAST_SIGNAL
};

struct _ESignaturePreviewPrivate {
    ESignature *signature;
    guint disable_command_line : 1;
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (
    ESignaturePreview,
    e_signature_preview,
    E_TYPE_WEB_VIEW)

static void
signature_preview_set_property (GObject *object,
                                guint property_id,
                                const GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_DISABLE_COMMAND_LINE:
            e_signature_preview_set_disable_command_line (
                E_SIGNATURE_PREVIEW (object),
                g_value_get_boolean (value));
            return;

        case PROP_SIGNATURE:
            e_signature_preview_set_signature (
                E_SIGNATURE_PREVIEW (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
signature_preview_get_property (GObject *object,
                                guint property_id,
                                GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_DISABLE_COMMAND_LINE:
            g_value_set_boolean (
                value,
                e_signature_preview_get_disable_command_line (
                E_SIGNATURE_PREVIEW (object)));
            return;

        case PROP_SIGNATURE:
            g_value_set_object (
                value,
                e_signature_preview_get_signature (
                E_SIGNATURE_PREVIEW (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
signature_preview_dispose (GObject *object)
{
    ESignaturePreviewPrivate *priv;

    priv = E_SIGNATURE_PREVIEW (object)->priv;

    if (priv->signature != NULL) {
        g_object_unref (priv->signature);
        priv->signature = NULL;
    }

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

static void
signature_preview_constructed (GObject *object)
{
#ifndef G_OS_WIN32
    GSettings *settings;

    settings = g_settings_new ("org.gnome.desktop.lockdown");

    g_settings_bind (
        settings, "disable-command-line",
        object, "disable-command-line",
        G_SETTINGS_BIND_GET);

    g_object_unref (settings);
#endif

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

static void
signature_preview_refresh (ESignaturePreview *preview)
{
    EWebView *web_view;
    ESignature *signature;
    const gchar *filename;
    gboolean is_script;
    gchar *content = NULL;

    /* XXX We should show error messages in the preview. */

    web_view = E_WEB_VIEW (preview);
    signature = e_signature_preview_get_signature (preview);

    if (signature == NULL)
        goto clear;

    filename = e_signature_get_filename (signature);
    is_script = e_signature_get_is_script (signature);

    if (is_script && preview->priv->disable_command_line)
        goto clear;

    if (is_script)
        content = e_run_signature_script (filename);
    else
        content = e_read_signature_file (signature, FALSE, NULL);

    if (content == NULL || *content == '\0')
        goto clear;

    if (e_signature_get_is_html (signature))
        e_web_view_load_string (web_view, content);
    else {
        gchar *string;

        string = g_strdup_printf ("<PRE>%s</PRE>", content);
        e_web_view_load_string (web_view, string);
        g_free (string);
    }

    g_free (content);

    return;

clear:
    e_web_view_clear (web_view);

    g_free (content);
}

static void
e_signature_preview_class_init (ESignaturePreviewClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (ESignaturePreviewPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = signature_preview_set_property;
    object_class->get_property = signature_preview_get_property;
    object_class->dispose = signature_preview_dispose;
    object_class->constructed = signature_preview_constructed;

    class->refresh = signature_preview_refresh;

    g_object_class_install_property (
        object_class,
        PROP_DISABLE_COMMAND_LINE,
        g_param_spec_boolean (
            "disable-command-line",
            "Disable Command Line",
            NULL,
            FALSE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_SIGNATURE,
        g_param_spec_object (
            "signature",
            "Signature",
            NULL,
            E_TYPE_SIGNATURE,
            G_PARAM_READWRITE));

    signals[REFRESH] = g_signal_new (
        "refresh",
        G_TYPE_FROM_CLASS (class),
        G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
        G_STRUCT_OFFSET (ESignaturePreviewClass, refresh),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);
}

static void
e_signature_preview_init (ESignaturePreview *preview)
{
    preview->priv = G_TYPE_INSTANCE_GET_PRIVATE (
        preview, E_TYPE_SIGNATURE_PREVIEW, ESignaturePreviewPrivate);
}

GtkWidget *
e_signature_preview_new (void)
{
    return g_object_new (E_TYPE_SIGNATURE_PREVIEW, NULL);
}

void
e_signature_preview_refresh (ESignaturePreview *preview)
{
    g_return_if_fail (E_IS_SIGNATURE_PREVIEW (preview));

    g_signal_emit (preview, signals[REFRESH], 0);
}

gboolean
e_signature_preview_get_disable_command_line (ESignaturePreview *preview)
{
    g_return_val_if_fail (E_IS_SIGNATURE_PREVIEW (preview), FALSE);

    return preview->priv->disable_command_line;
}

void
e_signature_preview_set_disable_command_line (ESignaturePreview *preview,
                                              gboolean disable_command_line)
{
    g_return_if_fail (E_IS_SIGNATURE_PREVIEW (preview));

    preview->priv->disable_command_line = disable_command_line;

    g_object_notify (G_OBJECT (preview), "disable-command-line");
}

ESignature *
e_signature_preview_get_signature (ESignaturePreview *preview)
{
    g_return_val_if_fail (E_IS_SIGNATURE_PREVIEW (preview), NULL);

    return preview->priv->signature;
}

void
e_signature_preview_set_signature (ESignaturePreview *preview,
                                   ESignature *signature)
{
    g_return_if_fail (E_IS_SIGNATURE_PREVIEW (preview));

    if (signature != NULL) {
        g_return_if_fail (E_IS_SIGNATURE (signature));
        g_object_ref (signature);
    }

    if (preview->priv->signature != NULL)
        g_object_unref (preview->priv->signature);

    preview->priv->signature = signature;
    g_object_notify (G_OBJECT (preview), "signature");

    e_signature_preview_refresh (preview);
}