1 files changed, 566 insertions, 0 deletions

diff --git a/e-util/e-filter-option.c b/e-util/e-filter-option.c
new file mode 100644
index 0000000000..630ab31916
--- /dev/null
+++ b/e-util/e-filter-option.c
@@ -0,0 +1,566 @@
+/*
+ * 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 <gtk/gtk.h>
+#include <glib/gi18n.h>
+#include <gmodule.h>
+
+#include "e-filter-option.h"
+#include "e-filter-part.h"
+
+G_DEFINE_TYPE (
+	EFilterOption,
+	e_filter_option,
+	E_TYPE_FILTER_ELEMENT)
+
+static void
+free_option (struct _filter_option *opt)
+{
+	g_free (opt->title);
+	g_free (opt->value);
+	g_free (opt->code);
+	g_free (opt->code_gen_func);
+	g_free (opt);
+}
+
+static struct _filter_option *
+find_option (EFilterOption *option,
+             const gchar *name)
+{
+	GList *link;
+
+	for (link = option->options; link != NULL; link = g_list_next (link)) {
+		struct _filter_option *opt = link->data;
+
+		if (strcmp (name, opt->value) == 0)
+			return opt;
+	}
+
+	return NULL;
+}
+
+static void
+filter_option_combobox_changed (GtkComboBox *combo_box,
+                                EFilterElement *element)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	gint active;
+
+	active = gtk_combo_box_get_active (combo_box);
+	option->current = g_list_nth_data (option->options, active);
+}
+
+static GSList *
+filter_option_get_dynamic_options (EFilterOption *option)
+{
+	GModule *module;
+	GSList *(*get_func)(void);
+	GSList *res = NULL;
+
+	if (!option || !option->dynamic_func)
+		return res;
+
+	module = g_module_open (NULL, G_MODULE_BIND_LAZY);
+
+	if (g_module_symbol (module, option->dynamic_func, (gpointer) &get_func)) {
+		res = get_func ();
+	} else {
+		g_warning (
+			"optionlist dynamic fill function '%s' not found",
+			option->dynamic_func);
+	}
+
+	g_module_close (module);
+
+	return res;
+}
+
+static void
+filter_option_generate_code (EFilterOption *option,
+                             GString *out,
+                             EFilterPart *part)
+{
+	GModule *module;
+	void (*code_gen_func) (EFilterElement *element, GString *out, EFilterPart *part);
+
+	if (!option || !option->current || !option->current->code_gen_func)
+		return;
+
+	module = g_module_open (NULL, G_MODULE_BIND_LAZY);
+
+	if (g_module_symbol (module, option->current->code_gen_func, (gpointer) &code_gen_func)) {
+		code_gen_func (E_FILTER_ELEMENT (option), out, part);
+	} else {
+		g_warning (
+			"optionlist dynamic code function '%s' not found",
+			option->current->code_gen_func);
+	}
+
+	g_module_close (module);
+}
+
+static void
+filter_option_finalize (GObject *object)
+{
+	EFilterOption *option = E_FILTER_OPTION (object);
+
+	g_list_foreach (option->options, (GFunc) free_option, NULL);
+	g_list_free (option->options);
+
+	g_free (option->dynamic_func);
+
+	/* Chain up to parent's finalize() method. */
+	G_OBJECT_CLASS (e_filter_option_parent_class)->finalize (object);
+}
+
+static gint
+filter_option_eq (EFilterElement *element_a,
+                  EFilterElement *element_b)
+{
+	EFilterOption *option_a = E_FILTER_OPTION (element_a);
+	EFilterOption *option_b = E_FILTER_OPTION (element_b);
+
+	/* Chain up to parent's eq() method. */
+	if (!E_FILTER_ELEMENT_CLASS (e_filter_option_parent_class)->
+		eq (element_a, element_b))
+		return FALSE;
+
+	if (option_a->current == NULL && option_b->current == NULL)
+		return TRUE;
+
+	if (option_a->current == NULL || option_b->current == NULL)
+		return FALSE;
+
+	return (g_strcmp0 (option_a->current->value, option_b->current->value) == 0);
+}
+
+static void
+filter_option_xml_create (EFilterElement *element,
+                          xmlNodePtr node)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	xmlNodePtr n, work;
+
+	/* Chain up to parent's xml_create() method. */
+	E_FILTER_ELEMENT_CLASS (e_filter_option_parent_class)->
+		xml_create (element, node);
+
+	n = node->children;
+	while (n) {
+		if (!strcmp ((gchar *) n->name, "option")) {
+			gchar *tmp, *value, *title = NULL, *code = NULL, *code_gen_func = NULL;
+
+			value = (gchar *) xmlGetProp (n, (xmlChar *)"value");
+			work = n->children;
+			while (work) {
+				if (!strcmp ((gchar *) work->name, "title") ||
+					!strcmp ((gchar *) work->name, "_title")) {
+					if (!title) {
+						if (!(tmp = (gchar *) xmlNodeGetContent (work)))
+							tmp = (gchar *) xmlStrdup ((xmlChar *)"");
+
+						title = g_strdup (tmp);
+						xmlFree (tmp);
+					}
+				} else if (!strcmp ((gchar *) work->name, "code")) {
+					if (code || code_gen_func) {
+						g_warning (
+							"Element 'code' defined twice in '%s'",
+							element->name);
+					} else {
+						xmlChar *fn;
+
+						/* if element 'code' has attribute 'func', then
+						 * the content of the element is ignored and only
+						 * the 'func' is used to generate actual rule code;
+						 * The function prototype is:
+						 * void code_gen_func (EFilterElement *element, GString *out, EFilterPart *part);
+						 * where @element is the one on which was called,
+						 * @out is GString where to add the code, and
+						 * @part is part which contains @element and other options of it.
+						*/
+						fn = xmlGetProp (work, (xmlChar *)"func");
+						if (fn && *fn) {
+							code_gen_func = g_strdup ((const gchar *) fn);
+						} else {
+							if (!(tmp = (gchar *) xmlNodeGetContent (work)))
+								tmp = (gchar *) xmlStrdup ((xmlChar *)"");
+
+							code = g_strdup (tmp);
+							xmlFree (tmp);
+						}
+
+						xmlFree (fn);
+					}
+				}
+				work = work->next;
+			}
+
+			e_filter_option_add (option, value, title, code, code_gen_func, FALSE);
+			xmlFree (value);
+			g_free (title);
+			g_free (code);
+			g_free (code_gen_func);
+		} else if (g_str_equal ((gchar *) n->name, "dynamic")) {
+			if (option->dynamic_func) {
+				g_warning (
+					"Only one 'dynamic' node is "
+					"acceptable in the optionlist '%s'",
+					element->name);
+			} else {
+				/* Expecting only one <dynamic func="cb" />
+				 * in the option list,
+				 * The 'cb' should be of this prototype:
+				 * GSList *cb (void);
+				 * returning GSList of struct _filter_option,
+				 * all newly allocated, because it'll be
+				 * freed with g_free and g_slist_free.
+				 * 'is_dynamic' member is ignored here.
+				 */
+				xmlChar *fn;
+
+				fn = xmlGetProp (n, (xmlChar *)"func");
+				if (fn && *fn) {
+					GSList *items, *i;
+					struct _filter_option *op;
+
+					option->dynamic_func = g_strdup ((const gchar *) fn);
+
+					/* Get options now, to have them
+					 * available when reading saved
+					 * rules. */
+					items = filter_option_get_dynamic_options (option);
+					for (i = items; i; i = i->next) {
+						op = i->data;
+
+						if (op) {
+							e_filter_option_add (
+								option,
+								op->value,
+								op->title,
+								op->code,
+								op->code_gen_func,
+								TRUE);
+							free_option (op);
+						}
+					}
+
+					g_slist_free (items);
+				} else {
+					g_warning (
+						"Missing 'func' attribute within "
+						"'%s' node in optionlist '%s'",
+						n->name, element->name);
+				}
+
+				xmlFree (fn);
+			}
+		} else if (n->type == XML_ELEMENT_NODE) {
+			g_warning ("Unknown xml node within optionlist: %s\n", n->name);
+		}
+		n = n->next;
+	}
+}
+
+static xmlNodePtr
+filter_option_xml_encode (EFilterElement *element)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	xmlNodePtr value;
+
+	value = xmlNewNode (NULL, (xmlChar *) "value");
+	xmlSetProp (value, (xmlChar *) "name", (xmlChar *) element->name);
+	xmlSetProp (value, (xmlChar *) "type", (xmlChar *) option->type);
+	if (option->current)
+		xmlSetProp (value, (xmlChar *) "value", (xmlChar *) option->current->value);
+
+	return value;
+}
+
+static gint
+filter_option_xml_decode (EFilterElement *element,
+                          xmlNodePtr node)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	gchar *value;
+
+	xmlFree (element->name);
+	element->name = (gchar *) xmlGetProp (node, (xmlChar *)"name");
+
+	value = (gchar *) xmlGetProp (node, (xmlChar *)"value");
+	if (value) {
+		option->current = find_option (option, value);
+		xmlFree (value);
+	} else {
+		option->current = NULL;
+	}
+
+	return 0;
+}
+
+static EFilterElement *
+filter_option_clone (EFilterElement *element)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	EFilterOption *clone_option;
+	EFilterElement *clone;
+	GList *link;
+
+	/* Chain up to parent's clone() method. */
+	clone = E_FILTER_ELEMENT_CLASS (e_filter_option_parent_class)->
+		clone (element);
+
+	clone_option = E_FILTER_OPTION (clone);
+
+	for (link = option->options; link != NULL; link = g_list_next (link)) {
+		struct _filter_option *op = link->data;
+		struct _filter_option *newop;
+
+		newop = e_filter_option_add (
+			clone_option, op->value,
+			op->title, op->code, op->code_gen_func, op->is_dynamic);
+		if (option->current == op)
+			clone_option->current = newop;
+	}
+
+	clone_option->dynamic_func = g_strdup (option->dynamic_func);
+
+	return clone;
+}
+
+static GtkWidget *
+filter_option_get_widget (EFilterElement *element)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+	GtkWidget *combobox;
+	GList *l;
+	struct _filter_option *op;
+	gint index = 0, current = 0;
+
+	if (option->dynamic_func) {
+		/* it is dynamically filled, thus remove all dynamics
+		 * and put there the fresh ones */
+		GSList *items, *i;
+		GList *old_ops;
+		struct _filter_option *old_cur;
+
+		old_ops = option->options;
+		old_cur = option->current;
+
+		/* start with an empty list */
+		option->current = NULL;
+		option->options = NULL;
+
+		for (l = option->options; l; l = l->next) {
+			op = l->data;
+
+			if (op->is_dynamic) {
+				break;
+			} else {
+				e_filter_option_add (
+					option, op->value, op->title,
+					op->code, op->code_gen_func, FALSE);
+			}
+		}
+
+		items = filter_option_get_dynamic_options (option);
+		for (i = items; i; i = i->next) {
+			op = i->data;
+
+			if (op) {
+				e_filter_option_add (
+					option, op->value, op->title,
+					op->code, op->code_gen_func, TRUE);
+				free_option (op);
+			}
+		}
+
+		g_slist_free (items);
+
+		/* maybe some static left after those dynamic, add them too */
+		for (; l; l = l->next) {
+			op = l->data;
+
+			if (!op->is_dynamic)
+				e_filter_option_add (
+					option, op->value, op->title,
+					op->code, op->code_gen_func, FALSE);
+		}
+
+		if (old_cur)
+			e_filter_option_set_current (option, old_cur->value);
+
+		/* free old list */
+		g_list_foreach (old_ops, (GFunc) free_option, NULL);
+		g_list_free (old_ops);
+	}
+
+	combobox = gtk_combo_box_text_new ();
+	l = option->options;
+	while (l) {
+		op = l->data;
+		gtk_combo_box_text_append_text (
+			GTK_COMBO_BOX_TEXT (combobox), _(op->title));
+
+		if (op == option->current)
+			current = index;
+
+		l = g_list_next (l);
+		index++;
+	}
+
+	g_signal_connect (
+		combobox, "changed",
+		G_CALLBACK (filter_option_combobox_changed), element);
+
+	gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), current);
+
+	return combobox;
+}
+
+static void
+filter_option_build_code (EFilterElement *element,
+                          GString *out,
+                          EFilterPart *part)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+
+	if (option->current && option->current->code_gen_func) {
+		filter_option_generate_code (option, out, part);
+	} else if (option->current && option->current->code) {
+		e_filter_part_expand_code (part, option->current->code, out);
+	}
+}
+
+static void
+filter_option_format_sexp (EFilterElement *element,
+                           GString *out)
+{
+	EFilterOption *option = E_FILTER_OPTION (element);
+
+	if (option->current)
+		camel_sexp_encode_string (out, option->current->value);
+}
+
+static void
+e_filter_option_class_init (EFilterOptionClass *class)
+{
+	GObjectClass *object_class;
+	EFilterElementClass *filter_element_class;
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->finalize = filter_option_finalize;
+
+	filter_element_class = E_FILTER_ELEMENT_CLASS (class);
+	filter_element_class->eq = filter_option_eq;
+	filter_element_class->xml_create = filter_option_xml_create;
+	filter_element_class->xml_encode = filter_option_xml_encode;
+	filter_element_class->xml_decode = filter_option_xml_decode;
+	filter_element_class->clone = filter_option_clone;
+	filter_element_class->get_widget = filter_option_get_widget;
+	filter_element_class->build_code = filter_option_build_code;
+	filter_element_class->format_sexp = filter_option_format_sexp;
+}
+
+static void
+e_filter_option_init (EFilterOption *option)
+{
+	option->type = "option";
+	option->dynamic_func = NULL;
+}
+
+EFilterElement *
+e_filter_option_new (void)
+{
+	return g_object_new (E_TYPE_FILTER_OPTION, NULL);
+}
+
+void
+e_filter_option_set_current (EFilterOption *option,
+                             const gchar *name)
+{
+	g_return_if_fail (E_IS_FILTER_OPTION (option));
+
+	option->current = find_option (option, name);
+}
+
+/* used by implementers to add additional options */
+struct _filter_option *
+e_filter_option_add (EFilterOption *option,
+                     const gchar *value,
+                     const gchar *title,
+                     const gchar *code,
+                     const gchar *code_gen_func,
+                     gboolean is_dynamic)
+{
+	struct _filter_option *op;
+
+	g_return_val_if_fail (E_IS_FILTER_OPTION (option), NULL);
+	g_return_val_if_fail (find_option (option, value) == NULL, NULL);
+
+	if (code_gen_func && !*code_gen_func)
+		code_gen_func = NULL;
+
+	op = g_malloc (sizeof (*op));
+	op->title = g_strdup (title);
+	op->value = g_strdup (value);
+	op->code = g_strdup (code);
+	op->code_gen_func = g_strdup (code_gen_func);
+	op->is_dynamic = is_dynamic;
+
+	option->options = g_list_append (option->options, op);
+
+	if (option->current == NULL)
+		option->current = op;
+
+	return op;
+}
+
+const gchar *
+e_filter_option_get_current (EFilterOption *option)
+{
+	g_return_val_if_fail (E_IS_FILTER_OPTION (option), NULL);
+
+	if (option->current == NULL)
+		return NULL;
+
+	return option->current->value;
+}
+
+void
+e_filter_option_remove_all (EFilterOption *option)
+{
+	g_return_if_fail (E_IS_FILTER_OPTION (option));
+
+	g_list_foreach (option->options, (GFunc) free_option, NULL);
+	g_list_free (option->options);
+
+	option->options = NULL;
+	option->current = NULL;
+}