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	/* siglist.c - The GNU Privacy Assistant
	* Copyright (C) 2000, 2001 G-N-U GmbH.
	*
	* This file is part of GPA
	*
	* GPA is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* GPA 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 General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
	*/

	#include <config.h>

	#include "gpa.h"
	#include <stdlib.h>
	#include <string.h>
	#include <gtk/gtk.h>
	#include <config.h>
	#include "gpapastrings.h"
	#include "siglist.h"

	/*
	* Implement a List showing signatures
	*/

	typedef enum
	{
	SIG_KEYID_COLUMN,
	SIG_STATUS_COLUMN,
	SIG_USERID_COLUMN,
	SIG_LOCAL_COLUMN,
	SIG_LEVEL_COLUMN,
	SIG_N_COLUMNS
	} SignatureListColumn;

	static void
	gpa_siglist_ui_mode_changed_cb (GpaOptions options, GtkWidget list);

	/* Create the list of signatures */
	GtkWidget *
	gpa_siglist_new (void)
	{
	GtkListStore *store;
	GtkWidget *list;

	store = gtk_list_store_new (SIG_N_COLUMNS, G_TYPE_STRING,
	G_TYPE_STRING, G_TYPE_STRING, G_TYPE_BOOLEAN,
	G_TYPE_STRING);
	list = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
	gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (list), TRUE);
	gtk_widget_set_size_request (list, 400, 100);

	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
	SIG_USERID_COLUMN, GTK_SORT_ASCENDING);

	g_signal_connect (G_OBJECT (gpa_options_get_instance ()),
	"changed_ui_mode",
	(GCallback)gpa_siglist_ui_mode_changed_cb, list);

	return list;
	}

	/* Remove all columns from the list */
	static void
	gpa_siglist_clear_columns (GtkWidget *list)
	{
	GList columns, i;

	columns = gtk_tree_view_get_columns (GTK_TREE_VIEW (list));
	for (i = columns; i; i = g_list_next (i))
	{
	gtk_tree_view_remove_column (GTK_TREE_VIEW (list),
	(GtkTreeViewColumn*) i->data);
	}
	}

	/* Add columns common to signatures on all UID's */
	static void
	gpa_siglist_all_add_columns (GtkWidget *list)
	{
	GtkTreeViewColumn *column;
	GtkCellRenderer *renderer;

	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("Key ID"), renderer,
	"text", SIG_KEYID_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);

	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("User Name"), renderer,
	"text", SIG_USERID_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);
	}

	/* Add columns for signatures on one UID */
	static void
	gpa_siglist_uid_add_columns (GtkWidget *list)
	{
	GtkTreeViewColumn *column;
	GtkCellRenderer *renderer;

	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("Key ID"), renderer,
	"text", SIG_KEYID_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);

	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("Status"), renderer,
	"markup",
	SIG_STATUS_COLUMN, NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);

	if (!gpa_options_get_simplified_ui (gpa_options_get_instance ()))
	{
	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("Level"), renderer,
	"markup",
	SIG_LEVEL_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);

	renderer = gtk_cell_renderer_toggle_new ();
	column = gtk_tree_view_column_new_with_attributes (_("Local"), renderer,
	"active",
	SIG_LOCAL_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);
	}

	renderer = gtk_cell_renderer_text_new ();
	column = gtk_tree_view_column_new_with_attributes (_("User Name"), renderer,
	"text", SIG_USERID_COLUMN,
	NULL);
	gtk_tree_view_append_column (GTK_TREE_VIEW (list), column);
	}

	static void
	add_signature (gpgme_key_sig_t sig, GtkListStore store, GHashTable revoked)
	{
	GtkTreeIter iter;
	const gchar sig_level, status;
	gchar *user_id;

	sig_level = gpa_gpgme_key_sig_get_level (sig);
	user_id = gpa_gpgme_key_sig_get_userid (sig);
	/* The list of revoked signatures might not be always available */
	if (revoked)
	{
	status = gpa_gpgme_key_sig_get_sig_status (sig, revoked);
	}
	else
	{
	status = "";
	}
	/* Append it to the list */
	gtk_list_store_append (store, &iter);
	gtk_list_store_set (store, &iter,
	SIG_KEYID_COLUMN, gpa_gpgme_key_sig_get_short_keyid(sig),
	SIG_STATUS_COLUMN, status,
	SIG_USERID_COLUMN, user_id,
	SIG_LEVEL_COLUMN, sig_level,
	SIG_LOCAL_COLUMN, !sig->exportable,
	-1);
	g_free (user_id);
	}

	static void add_signature_cb (gchar *keyid, gpgme_key_sig_t sig,
	GtkListStore *store)
	{
	add_signature (sig, store, NULL);
	}

	static void
	gpa_siglist_set_all (GtkWidget * list, const gpgme_key_t key)
	{
	GtkListStore *store = GTK_LIST_STORE (gtk_tree_view_get_model
	(GTK_TREE_VIEW (list)));
	gpgme_user_id_t uid;

	/* Create the hash table */
	GHashTable *hash = g_hash_table_new (g_str_hash, g_str_equal);

	/* Set the appropiate columns */
	gpa_siglist_clear_columns (list);
	gpa_siglist_all_add_columns (list);

	/* Clear the model */
	gtk_list_store_clear (store);

	/* Iterate over UID's and signatures and add unique values to the hash */
	for (uid = key->uids; uid; uid = uid->next)
	{
	gpgme_key_sig_t sig;
	for (sig = uid->signatures; sig; sig = sig->next)
	{
	char *keyid = sig->keyid;
	/* Here we assume (wrongly) that long KeyID are unique. But there
	* is basically no other way to do this, and in this context it
	* doens't matter that much (at most, one signature will be missing
	* from the "all" list).*/
	if (!g_hash_table_lookup (hash, keyid))
	{
	/* Add the signature to the list */
	/* FIXME: This saves the first signature on the key in each UID,
	* if they have different attributes, this may cause trouble */
	g_hash_table_insert (hash, (gchar*) keyid, sig);
	}
	}
	}
	/* Now, add each signature to the list */
	g_hash_table_foreach (hash, (GHFunc)add_signature_cb, store);

	/* Delete the hash table */
	g_hash_table_destroy (hash);
	}

	static GHashTable*
	revoked_signatures (gpgme_key_t key, gpgme_user_id_t uid)
	{
	GHashTable *hash = g_hash_table_new (g_str_hash, g_str_equal);
	gpgme_key_sig_t sig;

	for (sig = uid->signatures; sig; sig = sig->next)
	{
	if (sig->revoked)
	{
	g_hash_table_insert (hash, (gchar) sig->keyid, (gchar) sig->keyid);
	}
	}

	return hash;
	}

	static void
	gpa_siglist_set_userid (GtkWidget * list, const gpgme_key_t key,
	gpgme_user_id_t uid)
	{
	GtkListStore *store = GTK_LIST_STORE (gtk_tree_view_get_model
	(GTK_TREE_VIEW (list)));
	GHashTable *revoked;
	gpgme_key_sig_t sig;

	/* Set the appropiate columns */
	gpa_siglist_clear_columns (list);
	gpa_siglist_uid_add_columns (list);

	/* Get the list of revoked signatures */
	revoked = revoked_signatures (key, uid);

	/* Clear the model */
	gtk_list_store_clear (store);
	/* Add the signatures to the model */
	for (sig = uid->signatures; sig; sig = sig->next)
	{
	/* Ignore revocation signatures */
	if (!sig->revoked)
	{
	add_signature (sig, store, revoked);
	}
	}
	}

	/* Update the siglist to the right mode */
	static void
	gpa_siglist_ui_mode_changed_cb (GpaOptions options, GtkWidget list)
	{
	/* Rebuild the columns */
	gpa_siglist_clear_columns (list);
	if (GPOINTER_TO_INT (g_object_get_data (G_OBJECT (list), "all_signatures")))
	{
	gpa_siglist_all_add_columns (list);
	}
	else
	{
	gpa_siglist_uid_add_columns (list);
	}
	}

	/* Update the list of signatures */
	void
	gpa_siglist_set_signatures (GtkWidget * list, gpgme_key_t key, int idx)
	{
	GtkListStore *store = GTK_LIST_STORE (gtk_tree_view_get_model
	(GTK_TREE_VIEW (list)));
	if (key)
	{
	if (idx == -1)
	{
	gpa_siglist_set_all (list, key);
	g_object_set_data (G_OBJECT (list), "all_signatures",
	GINT_TO_POINTER (TRUE));
	}
	else
	{
	gpgme_user_id_t uid;
	int i;
	/* Find the right user id */
	for (i = 0, uid = key->uids; i < idx; i++, uid = uid->next)
	{
	}
	gpa_siglist_set_userid (list, key, uid);
	g_object_set_data (G_OBJECT (list), "all_signatures",
	GINT_TO_POINTER (FALSE));
	}
	}
	else
	{
	gtk_list_store_clear (store);
	}
	}

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