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-rw-r--r--widgets/misc/e-signature-preview.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/widgets/misc/e-signature-preview.c b/widgets/misc/e-signature-preview.c
new file mode 100644
index 0000000000..d618e05daa
--- /dev/null
+++ b/widgets/misc/e-signature-preview.c
@@ -0,0 +1,344 @@
+/*
+ * 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)
+ *
+ */
+
+#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"
+
+#define E_SIGNATURE_PREVIEW_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE \
+ ((obj), E_TYPE_SIGNATURE_PREVIEW, ESignaturePreviewPrivate))
+
+enum {
+ PROP_0,
+ PROP_ALLOW_SCRIPTS,
+ PROP_SIGNATURE
+};
+
+enum {
+ REFRESH,
+ LAST_SIGNAL
+};
+
+struct _ESignaturePreviewPrivate {
+ ESignature *signature;
+ guint allow_scripts : 1;
+};
+
+static gpointer parent_class;
+static guint signals[LAST_SIGNAL];
+
+static void
+signature_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ switch (property_id) {
+ case PROP_ALLOW_SCRIPTS:
+ e_signature_preview_set_allow_scripts (
+ 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_ALLOW_SCRIPTS:
+ g_value_set_boolean (
+ value, e_signature_preview_get_allow_scripts (
+ 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_GET_PRIVATE (object);
+
+ if (priv->signature != NULL) {
+ g_object_unref (priv->signature);
+ priv->signature = NULL;
+ }
+
+ /* Chain up to parent's dispose() method. */
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+signature_preview_url_requested (GtkHTML *html,
+ const gchar *url,
+ GtkHTMLStream *handle)
+{
+ GtkHTMLStreamStatus status;
+ gchar buffer[128];
+ gchar *filename;
+ gssize size;
+ gint fd;
+
+ /* FIXME Use GInputStream for this. */
+
+ if (g_str_has_prefix (url, "file:"))
+ filename = g_filename_from_uri (url, NULL, NULL);
+ else
+ filename = g_strdup (url);
+ fd = g_open (filename, O_RDONLY, 0);
+ g_free (filename);
+
+ status = GTK_HTML_STREAM_OK;
+ if (fd != -1) {
+ while ((size = read (fd, buffer, sizeof (buffer)))) {
+ if (size == -1) {
+ status = GTK_HTML_STREAM_ERROR;
+ break;
+ } else
+ gtk_html_write (html, handle, buffer, size);
+ }
+ } else
+ status = GTK_HTML_STREAM_ERROR;
+
+ gtk_html_end (html, handle, status);
+
+ if (fd > 0)
+ close (fd);
+}
+
+static void
+signature_preview_refresh (ESignaturePreview *preview)
+{
+ GtkHTML *html;
+ ESignature *signature;
+ gchar *content = NULL;
+ gsize length;
+
+ /* XXX We should show error messages in the preview. */
+
+ html = GTK_HTML (preview);
+ signature = e_signature_preview_get_signature (preview);
+
+ if (signature == NULL)
+ goto clear;
+
+ if (signature->script && !preview->priv->allow_scripts)
+ goto clear;
+
+ if (signature->script)
+ content = e_run_signature_script (signature->filename);
+ else
+ content = e_read_signature_file (signature, FALSE, NULL);
+
+ if (content == NULL || *content == '\0')
+ goto clear;
+
+ length = strlen (content);
+
+ if (signature->html)
+ gtk_html_load_from_string (html, content, length);
+ else {
+ GtkHTMLStream *stream;
+
+ stream = gtk_html_begin_content (
+ html, "text/html; charset=utf-8");
+ gtk_html_write (html, stream, "<PRE>", 5);
+ if (length > 0)
+ gtk_html_write (html, stream, content, length);
+ gtk_html_write (html, stream, "</PRE>", 6);
+ gtk_html_end (html, stream, GTK_HTML_STREAM_OK);
+ }
+
+ g_free (content);
+ return;
+
+clear:
+ gtk_html_load_from_string (html, " ", 1);
+ g_free (content);
+}
+
+static void
+signature_preview_class_init (ESignaturePreviewClass *class)
+{
+ GObjectClass *object_class;
+ GtkHTMLClass *html_class;
+
+ parent_class = g_type_class_peek_parent (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;
+
+ html_class = GTK_HTML_CLASS (class);
+ html_class->url_requested = signature_preview_url_requested;
+
+ class->refresh = signature_preview_refresh;
+
+ g_object_class_install_property (
+ object_class,
+ PROP_ALLOW_SCRIPTS,
+ g_param_spec_boolean (
+ "allow-scripts",
+ "Allow Scripts",
+ NULL,
+ TRUE,
+ 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
+signature_preview_init (ESignaturePreview *preview)
+{
+ preview->priv = E_SIGNATURE_PREVIEW_GET_PRIVATE (preview);
+}
+
+GType
+e_signature_preview_get_type (void)
+{
+ static GType type = 0;
+
+ if (G_UNLIKELY (type == 0)) {
+ static const GTypeInfo type_info = {
+ sizeof (ESignaturePreviewClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) signature_preview_class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL, /* class_data */
+ sizeof (ESignaturePreview),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) signature_preview_init,
+ NULL /* value_table */
+ };
+
+ type = g_type_register_static (
+ GTK_TYPE_HTML, "ESignaturePreview", &type_info, 0);
+ }
+
+ return type;
+}
+
+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_allow_scripts (ESignaturePreview *preview)
+{
+ g_return_val_if_fail (E_IS_SIGNATURE_PREVIEW (preview), FALSE);
+
+ return preview->priv->allow_scripts;
+}
+
+void
+e_signature_preview_set_allow_scripts (ESignaturePreview *preview,
+ gboolean allow_scripts)
+{
+ g_return_if_fail (E_IS_SIGNATURE_PREVIEW (preview));
+
+ preview->priv->allow_scripts = allow_scripts;
+ g_object_notify (G_OBJECT (preview), "allow-scripts");
+}
+
+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);
+}