diff options
Diffstat (limited to 'calendar/pcs/query.c')
| -rw-r--r-- | calendar/pcs/query.c | 1215 |
1 files changed, 0 insertions, 1215 deletions
diff --git a/calendar/pcs/query.c b/calendar/pcs/query.c deleted file mode 100644 index 48e77d216a..0000000000 --- a/calendar/pcs/query.c +++ /dev/null @@ -1,1215 +0,0 @@ -/* Evolution calendar - Live search query implementation - * - * Copyright (C) 2001 Ximian, Inc. - * - * Author: Federico Mena-Quintero <federico@ximian.com> - * - * This program 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. - * - * 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 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. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> -#include <glib.h> -#include <libgnome/gnome-defs.h> -#include <libgnome/gnome-i18n.h> -#include <gtk/gtksignal.h> -#include <gal/widgets/e-unicode.h> -#include <e-util/e-sexp.h> -#include <cal-util/cal-recur.h> -#include <cal-util/timeutil.h> -#include "query.h" - - - -/* Private part of the Query structure */ -struct _QueryPrivate { - /* The backend we are monitoring */ - CalBackend *backend; - - /* Listener to which we report changes in the live query */ - GNOME_Evolution_Calendar_QueryListener ql; - - /* Sexp that defines the query */ - char *sexp; - ESExp *esexp; - - /* Idle handler ID for asynchronous queries */ - guint idle_id; - - /* List of UIDs that we still have to process */ - GList *pending_uids; - int n_pending; - int pending_total; - - /* Table of the UIDs we know do match the query */ - GHashTable *uids; - - /* The next component that will be handled in e_sexp_eval(); put here - * just because the query object itself is the esexp context. - */ - CalComponent *next_comp; -}; - - - -static void query_class_init (QueryClass *class); -static void query_init (Query *query); -static void query_destroy (GtkObject *object); - -static BonoboXObjectClass *parent_class; - - - -BONOBO_X_TYPE_FUNC_FULL (Query, - GNOME_Evolution_Calendar_Query, - BONOBO_X_OBJECT_TYPE, - query); - -/* Class initialization function for the live search query */ -static void -query_class_init (QueryClass *class) -{ - GtkObjectClass *object_class; - - object_class = (GtkObjectClass *) class; - - parent_class = gtk_type_class (BONOBO_X_OBJECT_TYPE); - - object_class->destroy = query_destroy; - - /* The Query interface (ha ha! query interface!) has no methods, so we - * don't need to fiddle with the epv. - */ -} - -/* Object initialization function for the live search query */ -static void -query_init (Query *query) -{ - QueryPrivate *priv; - - priv = g_new0 (QueryPrivate, 1); - query->priv = priv; - - priv->backend = NULL; - priv->ql = CORBA_OBJECT_NIL; - priv->sexp = NULL; - - priv->pending_uids = NULL; - priv->uids = g_hash_table_new (g_str_hash, g_str_equal); - - priv->next_comp = NULL; -} - -/* Used from g_hash_table_foreach(); frees a UID */ -static void -free_uid_cb (gpointer key, gpointer value, gpointer data) -{ - char *uid; - - uid = key; - g_free (uid); -} - -/* Destroy handler for the live search query */ -static void -query_destroy (GtkObject *object) -{ - Query *query; - QueryPrivate *priv; - - g_return_if_fail (object != NULL); - g_return_if_fail (IS_QUERY (object)); - - query = QUERY (object); - priv = query->priv; - - if (priv->backend) { - gtk_signal_disconnect_by_data (GTK_OBJECT (priv->backend), query); - gtk_object_unref (GTK_OBJECT (priv->backend)); - priv->backend = NULL; - } - - if (priv->ql != CORBA_OBJECT_NIL) { - CORBA_Environment ev; - - CORBA_exception_init (&ev); - bonobo_object_release_unref (priv->ql, &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("query_destroy(): Could not unref the listener\n"); - - CORBA_exception_free (&ev); - - priv->ql = CORBA_OBJECT_NIL; - } - - if (priv->sexp) { - g_free (priv->sexp); - priv->sexp = NULL; - } - - if (priv->esexp) { - e_sexp_unref (priv->esexp); - priv->esexp = NULL; - } - - if (priv->idle_id) { - g_source_remove (priv->idle_id); - priv->idle_id = 0; - } - - if (priv->pending_uids) { - GList *l; - - for (l = priv->pending_uids; l; l = l->next) { - char *uid; - - uid = l->data; - g_assert (uid != NULL); - g_free (uid); - } - - g_list_free (priv->pending_uids); - priv->pending_uids = NULL; - priv->n_pending = 0; - } - - g_hash_table_foreach (priv->uids, free_uid_cb, NULL); - g_hash_table_destroy (priv->uids); - priv->uids = NULL; - - g_free (priv); - query->priv = NULL; - - if (GTK_OBJECT_CLASS (parent_class)->destroy) - (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); -} - - - -/* E-Sexp functions */ - -/* (time-now) - * - * Returns a time_t of time (NULL). - */ -static ESExpResult * -func_time_now (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - ESExpResult *result; - - if (argc != 0) { - e_sexp_fatal_error (esexp, _("time-now expects 0 arguments")); - return NULL; - } - - result = e_sexp_result_new (esexp, ESEXP_RES_TIME); - result->value.time = time (NULL); - - return result; -} - -/* (make-time ISODATE) - * - * ISODATE - string, ISO 8601 date/time representation - * - * Constructs a time_t value for the specified date. - */ -static ESExpResult * -func_make_time (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - const char *str; - time_t t; - ESExpResult *result; - - if (argc != 1) { - e_sexp_fatal_error (esexp, _("make-time expects 1 argument")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_STRING) { - e_sexp_fatal_error (esexp, _("make-time expects argument 1 " - "to be a string")); - return NULL; - } - str = argv[0]->value.string; - - t = time_from_isodate (str); - if (t == -1) { - e_sexp_fatal_error (esexp, _("make-time argument 1 must be an " - "ISO 8601 date/time string")); - return NULL; - } - - result = e_sexp_result_new (esexp, ESEXP_RES_TIME); - result->value.time = t; - - return result; -} - -/* (time-add-day TIME N) - * - * TIME - time_t, base time - * N - int, number of days to add - * - * Adds the specified number of days to a time value. - */ -static ESExpResult * -func_time_add_day (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - ESExpResult *result; - time_t t; - int n; - - if (argc != 2) { - e_sexp_fatal_error (esexp, _("time-add-day expects 2 arguments")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_TIME) { - e_sexp_fatal_error (esexp, _("time-add-day expects argument 1 " - "to be a time_t")); - return NULL; - } - t = argv[0]->value.time; - - if (argv[1]->type != ESEXP_RES_INT) { - e_sexp_fatal_error (esexp, _("time-add-day expects argument 2 " - "to be an integer")); - return NULL; - } - n = argv[1]->value.number; - - result = e_sexp_result_new (esexp, ESEXP_RES_TIME); - result->value.time = time_add_day (t, n); - - return result; -} - -/* (time-day-begin TIME) - * - * TIME - time_t, base time - * - * Returns the start of the day, according to the local time. - */ -static ESExpResult * -func_time_day_begin (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - time_t t; - ESExpResult *result; - - if (argc != 1) { - e_sexp_fatal_error (esexp, _("time-day-begin expects 1 argument")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_TIME) { - e_sexp_fatal_error (esexp, _("time-day-begin expects argument 1 " - "to be a time_t")); - return NULL; - } - t = argv[0]->value.time; - - result = e_sexp_result_new (esexp, ESEXP_RES_TIME); - result->value.time = time_day_begin (t); - - return result; -} - -/* (time-day-end TIME) - * - * TIME - time_t, base time - * - * Returns the end of the day, according to the local time. - */ -static ESExpResult * -func_time_day_end (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - time_t t; - ESExpResult *result; - - if (argc != 1) { - e_sexp_fatal_error (esexp, _("time-day-end expects 1 argument")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_TIME) { - e_sexp_fatal_error (esexp, _("time-day-end expects argument 1 " - "to be a time_t")); - return NULL; - } - t = argv[0]->value.time; - - result = e_sexp_result_new (esexp, ESEXP_RES_TIME); - result->value.time = time_day_end (t); - - return result; -} - -/* (get-vtype) - * - * Returns a string indicating the type of component (VEVENT, VTODO, VJOURNAL, - * VFREEBUSY, VTIMEZONE, UNKNOWN). - */ -static ESExpResult * -func_get_vtype (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - Query *query; - QueryPrivate *priv; - CalComponent *comp; - CalComponentVType vtype; - char *str; - ESExpResult *result; - - query = QUERY (data); - priv = query->priv; - - g_assert (priv->next_comp != NULL); - comp = priv->next_comp; - - /* Check argument types */ - - if (argc != 0) { - e_sexp_fatal_error (esexp, _("get-vtype expects 0 arguments")); - return NULL; - } - - /* Get the type */ - - vtype = cal_component_get_vtype (comp); - - switch (vtype) { - case CAL_COMPONENT_EVENT: - str = g_strdup ("VEVENT"); - break; - - case CAL_COMPONENT_TODO: - str = g_strdup ("VTODO"); - break; - - case CAL_COMPONENT_JOURNAL: - str = g_strdup ("VJOURNAL"); - break; - - case CAL_COMPONENT_FREEBUSY: - str = g_strdup ("VFREEBUSY"); - break; - - case CAL_COMPONENT_TIMEZONE: - str = g_strdup ("VTIMEZONE"); - break; - - default: - str = g_strdup ("UNKNOWN"); - break; - } - - result = e_sexp_result_new (esexp, ESEXP_RES_STRING); - result->value.string = str; - - return result; -} - -/* Sets a boolean value in the data to TRUE; called from - * cal_recur_generate_instances() to indicate that at least one instance occurs - * in the sought time range. We always return FALSE because we want the - * recurrence engine to finish as soon as possible. - */ -static gboolean -instance_occur_cb (CalComponent *comp, time_t start, time_t end, gpointer data) -{ - gboolean *occurs; - - occurs = data; - *occurs = TRUE; - - return FALSE; -} - -/* (occur-in-time-range? START END) - * - * START - time_t, start of the time range - * END - time_t, end of the time range - * - * Returns a boolean indicating whether the component has any occurrences in the - * specified time range. - */ -static ESExpResult * -func_occur_in_time_range (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - Query *query; - QueryPrivate *priv; - CalComponent *comp; - time_t start, end; - gboolean occurs; - ESExpResult *result; - - query = QUERY (data); - priv = query->priv; - - g_assert (priv->next_comp != NULL); - comp = priv->next_comp; - - /* Check argument types */ - - if (argc != 2) { - e_sexp_fatal_error (esexp, _("occur-in-time-range? expects 2 arguments")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_TIME) { - e_sexp_fatal_error (esexp, _("occur-in-time-range? expects argument 1 " - "to be a time_t")); - return NULL; - } - start = argv[0]->value.time; - - if (argv[1]->type != ESEXP_RES_TIME) { - e_sexp_fatal_error (esexp, _("occur-in-time-range? expects argument 2 " - "to be a time_t")); - return NULL; - } - end = argv[1]->value.time; - - /* See if there is at least one instance in that range */ - - occurs = FALSE; - cal_recur_generate_instances (comp, start, end, instance_occur_cb, &occurs); - - result = e_sexp_result_new (esexp, ESEXP_RES_BOOL); - result->value.bool = occurs; - - return result; -} - -/* Returns whether a list of CalComponentText items matches the specified string */ -static gboolean -matches_text_list (GSList *text_list, const char *str) -{ - GSList *l; - gboolean matches; - - matches = FALSE; - - for (l = text_list; l; l = l->next) { - CalComponentText *text; - - text = l->data; - g_assert (text->value != NULL); - - if (e_utf8_strstrcase (text->value, str) != NULL) { - matches = TRUE; - break; - } - } - - return matches; -} - -/* Returns whether the comments in a component matches the specified string */ -static gboolean -matches_comment (CalComponent *comp, const char *str) -{ - GSList *list; - gboolean matches; - - cal_component_get_comment_list (comp, &list); - matches = matches_text_list (list, str); - cal_component_free_text_list (list); - - return matches; -} - -/* Returns whether the description in a component matches the specified string */ -static gboolean -matches_description (CalComponent *comp, const char *str) -{ - GSList *list; - gboolean matches; - - cal_component_get_description_list (comp, &list); - matches = matches_text_list (list, str); - cal_component_free_text_list (list); - - return matches; -} - -/* Returns whether the summary in a component matches the specified string */ -static gboolean -matches_summary (CalComponent *comp, const char *str) -{ - CalComponentText text; - - cal_component_get_summary (comp, &text); - - if (!text.value) - return FALSE; - - return e_utf8_strstrcase (text.value, str) != NULL; -} - -/* Returns whether any text field in a component matches the specified string */ -static gboolean -matches_any (CalComponent *comp, const char *str) -{ - /* As an optimization, and to make life easier for the individual - * predicate functions, see if we are looking for the empty string right - * away. - */ - if (strlen (str) == 0) - return TRUE; - - return (matches_comment (comp, str) - || matches_description (comp, str) - || matches_summary (comp, str)); -} - -/* (contains? FIELD STR) - * - * FIELD - string, name of field to match (any, comment, description, summary) - * STR - string, match string - * - * Returns a boolean indicating whether the specified field contains the - * specified string. - */ -static ESExpResult * -func_contains (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - Query *query; - QueryPrivate *priv; - CalComponent *comp; - const char *field; - const char *str; - gboolean matches; - ESExpResult *result; - - query = QUERY (data); - priv = query->priv; - - g_assert (priv->next_comp != NULL); - comp = priv->next_comp; - - /* Check argument types */ - - if (argc != 2) { - e_sexp_fatal_error (esexp, _("contains? expects 2 arguments")); - return NULL; - } - - if (argv[0]->type != ESEXP_RES_STRING) { - e_sexp_fatal_error (esexp, _("contains? expects argument 1 " - "to be a string")); - return NULL; - } - field = argv[0]->value.string; - - if (argv[1]->type != ESEXP_RES_STRING) { - e_sexp_fatal_error (esexp, _("contains? expects argument 2 " - "to be a string")); - return NULL; - } - str = argv[1]->value.string; - - /* See if it matches */ - - if (strcmp (field, "any") == 0) - matches = matches_any (comp, str); - else if (strcmp (field, "comment") == 0) - matches = matches_comment (comp, str); - else if (strcmp (field, "description") == 0) - matches = matches_description (comp, str); - else if (strcmp (field, "summary") == 0) - matches = matches_summary (comp, str); - else { - e_sexp_fatal_error (esexp, _("contains? expects argument 1 to " - "be one of \"any\", \"summary\", \"description\"")); - return NULL; - } - - result = e_sexp_result_new (esexp, ESEXP_RES_BOOL); - result->value.bool = matches; - - return result; -} - -/* (has-categories? STR+) - * - * STR - At least one string specifying a category - * - * Returns a boolean indicating whether the component has all the specified - * categories. - */ -static ESExpResult * -func_has_categories (ESExp *esexp, int argc, ESExpResult **argv, void *data) -{ - Query *query; - QueryPrivate *priv; - CalComponent *comp; - int i; - GSList *categories; - gboolean matches; - ESExpResult *result; - - query = QUERY (data); - priv = query->priv; - - g_assert (priv->next_comp != NULL); - comp = priv->next_comp; - - /* Check argument types */ - - if (argc < 1) { - e_sexp_fatal_error (esexp, _("has-categories? expects at least 1 argument")); - return NULL; - } - - for (i = 0; i < argc; i++) - if (argv[i]->type != ESEXP_RES_STRING) { - e_sexp_fatal_error (esexp, _("has-categories? expects all arguments " - "to be strings")); - return NULL; - } - - /* Search categories */ - - cal_component_get_categories_list (comp, &categories); - if (!categories) { - result = e_sexp_result_new (esexp, ESEXP_RES_BOOL); - result->value.bool = FALSE; - - return result; - } - - matches = TRUE; - - for (i = 0; i < argc; i++) { - const char *sought; - GSList *l; - gboolean has_category; - - sought = argv[i]->value.string; - - has_category = FALSE; - - for (l = categories; l; l = l->next) { - const char *category; - - category = l->data; - - if (strcmp (category, sought) == 0) { - has_category = TRUE; - break; - } - } - - if (!has_category) { - matches = FALSE; - break; - } - } - - cal_component_free_categories_list (categories); - - result = e_sexp_result_new (esexp, ESEXP_RES_BOOL); - result->value.bool = matches; - - return result; -} - - - -/* Adds a component to our the UIDs hash table and notifies the client */ -static void -add_component (Query *query, const char *uid, gboolean query_in_progress, int n_scanned, int total) -{ - QueryPrivate *priv; - char *old_uid; - CORBA_Environment ev; - - if (query_in_progress) - g_assert (n_scanned > 0 || n_scanned <= total); - - priv = query->priv; - - if (g_hash_table_lookup_extended (priv->uids, uid, (gpointer *) &old_uid, NULL)) { - g_hash_table_remove (priv->uids, old_uid); - g_free (old_uid); - } - - g_hash_table_insert (priv->uids, g_strdup (uid), NULL); - - CORBA_exception_init (&ev); - GNOME_Evolution_Calendar_QueryListener_notifyObjUpdated ( - priv->ql, - (char *) uid, - query_in_progress, - n_scanned, - total, - &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("add_component(): Could not notify the listener of an " - "updated component"); - - CORBA_exception_free (&ev); -} - -/* Removes a component from our the UIDs hash table and notifies the client */ -static void -remove_component (Query *query, const char *uid) -{ - QueryPrivate *priv; - char *old_uid; - CORBA_Environment ev; - - priv = query->priv; - - if (!g_hash_table_lookup_extended (priv->uids, uid, (gpointer *) &old_uid, NULL)) - return; - - /* The component did match the query before but it no longer does, so we - * have to notify the client. - */ - - g_hash_table_remove (priv->uids, old_uid); - g_free (old_uid); - - CORBA_exception_init (&ev); - GNOME_Evolution_Calendar_QueryListener_notifyObjRemoved ( - priv->ql, - (char *) uid, - &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("remove_component(): Could not notify the listener of a " - "removed component"); - - CORBA_exception_free (&ev); -} - -/* Removes a component from the list of pending UIDs */ -static void -remove_from_pending (Query *query, const char *remove_uid) -{ - QueryPrivate *priv; - GList *l; - - priv = query->priv; - - for (l = priv->pending_uids; l; l = l->next) { - char *uid; - - g_assert (priv->n_pending > 0); - - uid = l->data; - if (strcmp (remove_uid, uid)) - continue; - - g_free (uid); - - priv->pending_uids = g_list_remove_link (priv->pending_uids, l); - g_list_free_1 (l); - priv->n_pending--; - - g_assert ((priv->pending_uids && priv->n_pending != 0) - || (!priv->pending_uids && priv->n_pending == 0)); - - break; - } -} - -static struct { - char *name; - ESExpFunc *func; -} functions[] = { - /* Time-related functions */ - { "time-now", func_time_now }, - { "make-time", func_make_time }, - { "time-add-day", func_time_add_day }, - { "time-day-begin", func_time_day_begin }, - { "time-day-end", func_time_day_end }, - - /* Component-related functions */ - { "get-vtype", func_get_vtype }, - { "occur-in-time-range?", func_occur_in_time_range }, - { "contains?", func_contains }, - { "has-categories?", func_has_categories } -}; - -/* Initializes a sexp by interning our own symbols */ -static ESExp * -create_sexp (Query *query) -{ - ESExp *esexp; - int i; - - esexp = e_sexp_new (); - - for (i = 0; i < (sizeof (functions) / sizeof (functions[0])); i++) - e_sexp_add_function (esexp, 0, functions[i].name, functions[i].func, query); - - return esexp; -} - -/* Evaluates the query sexp on the specified component and notifies the listener - * as appropriate. - */ -static void -match_component (Query *query, const char *uid, - gboolean query_in_progress, int n_scanned, int total) -{ - QueryPrivate *priv; - char *comp_str; - CalComponent *comp; - icalcomponent *icalcomp; - gboolean set_succeeded; - ESExpResult *result; - - priv = query->priv; - - comp_str = cal_backend_get_object (priv->backend, uid); - g_assert (comp_str != NULL); - - icalcomp = icalparser_parse_string (comp_str); - g_assert (icalcomp != NULL); - - g_free (comp_str); - - comp = cal_component_new (); - set_succeeded = cal_component_set_icalcomponent (comp, icalcomp); - g_assert (set_succeeded); - - /* Eval the sexp */ - - g_assert (priv->next_comp == NULL); - - priv->next_comp = comp; - result = e_sexp_eval (priv->esexp); - gtk_object_unref (GTK_OBJECT (comp)); - priv->next_comp = NULL; - - if (!result) { - const char *error_str; - CORBA_Environment ev; - - error_str = e_sexp_error (priv->esexp); - g_assert (error_str != NULL); - - CORBA_exception_init (&ev); - GNOME_Evolution_Calendar_QueryListener_notifyEvalError ( - priv->ql, - error_str, - &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("match_component(): Could not notify the listener of " - "an evaluation error"); - - CORBA_exception_free (&ev); - return; - } else if (result->type != ESEXP_RES_BOOL) { - CORBA_Environment ev; - - CORBA_exception_init (&ev); - GNOME_Evolution_Calendar_QueryListener_notifyEvalError ( - priv->ql, - _("Evaluation of the search expression did not yield a boolean value"), - &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("match_component(): Could not notify the listener of " - "an unexpected result value type when evaluating the " - "search expression"); - - CORBA_exception_free (&ev); - } else { - /* Success; process the component accordingly */ - - if (result->value.bool) - add_component (query, uid, query_in_progress, n_scanned, total); - else - remove_component (query, uid); - } - - e_sexp_result_free (priv->esexp, result); -} - -/* Processes a single component that is queued in the list */ -static gboolean -process_component_cb (gpointer data) -{ - Query *query; - QueryPrivate *priv; - char *uid; - GList *l; - - query = QUERY (data); - priv = query->priv; - - /* No more components? */ - - if (!priv->pending_uids) { - g_assert (priv->n_pending == 0); - - priv->idle_id = 0; - return FALSE; - } - - g_assert (priv->n_pending > 0); - - /* Fetch the component */ - - l = priv->pending_uids; - priv->pending_uids = g_list_remove_link (priv->pending_uids, l); - priv->n_pending--; - - g_assert ((priv->pending_uids && priv->n_pending != 0) - || (!priv->pending_uids && priv->n_pending == 0)); - - uid = l->data; - g_assert (uid != NULL); - - g_list_free_1 (l); - - bonobo_object_ref (BONOBO_OBJECT (query)); - - match_component (query, uid, - TRUE, - priv->pending_total - priv->n_pending, - priv->pending_total); - - bonobo_object_unref (BONOBO_OBJECT (query)); - - g_free (uid); - - return TRUE; -} - -/* Populates the query with pending UIDs so that they can be processed - * asynchronously. - */ -static void -populate_query (Query *query) -{ - QueryPrivate *priv; - - priv = query->priv; - g_assert (priv->idle_id == 0); - - priv->pending_uids = cal_backend_get_uids (priv->backend, CALOBJ_TYPE_ANY); - priv->pending_total = g_list_length (priv->pending_uids); - priv->n_pending = priv->pending_total; - - priv->idle_id = g_idle_add (process_component_cb, query); -} - -/* Idle handler for starting a query */ -static gboolean -start_query_cb (gpointer data) -{ - Query *query; - QueryPrivate *priv; - CORBA_Environment ev; - - query = QUERY (data); - priv = query->priv; - - priv->idle_id = 0; - - priv->esexp = create_sexp (query); - - /* Compile the query string */ - - g_assert (priv->sexp != NULL); - e_sexp_input_text (priv->esexp, priv->sexp, strlen (priv->sexp)); - - if (e_sexp_parse (priv->esexp) == -1) { - const char *error_str; - - error_str = e_sexp_error (priv->esexp); - g_assert (error_str != NULL); - - CORBA_exception_init (&ev); - GNOME_Evolution_Calendar_QueryListener_notifyQueryDone ( - priv->ql, - GNOME_Evolution_Calendar_QueryListener_PARSE_ERROR, - error_str, - &ev); - - if (ev._major != CORBA_NO_EXCEPTION) - g_message ("start_query_cb(): Could not notify the listener of " - "a parse error"); - - CORBA_exception_free (&ev); - return FALSE; - } - - /* Populate the query with UIDs so that we can process them asynchronously */ - - populate_query (query); - - return FALSE; -} - -/* Callback used when the backend gets loaded; we just queue the query to be - * started later. - */ -static void -backend_opened_cb (CalBackend *backend, CalBackendOpenStatus status, gpointer data) -{ - Query *query; - QueryPrivate *priv; - - query = QUERY (data); - priv = query->priv; - - if (status == CAL_BACKEND_OPEN_SUCCESS) { - g_assert (cal_backend_is_loaded (backend)); - g_assert (priv->idle_id == 0); - - priv->idle_id = g_idle_add (start_query_cb, query); - } -} - -/* Callback used when a component changes in the backend */ -static void -backend_obj_updated_cb (CalBackend *backend, const char *uid, gpointer data) -{ - Query *query; - - query = QUERY (data); - - bonobo_object_ref (BONOBO_OBJECT (query)); - - match_component (query, uid, FALSE, 0, 0); - remove_from_pending (query, uid); - - bonobo_object_unref (BONOBO_OBJECT (query)); -} - -/* Callback used when a component is removed from the backend */ -static void -backend_obj_removed_cb (CalBackend *backend, const char *uid, gpointer data) -{ - Query *query; - QueryPrivate *priv; - - query = QUERY (data); - priv = query->priv; - - bonobo_object_ref (BONOBO_OBJECT (query)); - - remove_component (query, uid); - remove_from_pending (query, uid); - - bonobo_object_unref (BONOBO_OBJECT (query)); -} - -/** - * query_construct: - * @query: A live search query. - * @backend: Calendar backend that the query object will monitor. - * @ql: Listener for query results. - * @sexp: Sexp that defines the query. - * - * Constructs a #Query object by binding it to a calendar backend and a query - * listener. The @query object will start to populate itself asynchronously and - * call the listener as appropriate. - * - * Return value: The same value as @query, or NULL if the query could not - * be constructed. - **/ -Query * -query_construct (Query *query, - CalBackend *backend, - GNOME_Evolution_Calendar_QueryListener ql, - const char *sexp) -{ - QueryPrivate *priv; - CORBA_Environment ev; - - g_return_val_if_fail (query != NULL, NULL); - g_return_val_if_fail (IS_QUERY (query), NULL); - g_return_val_if_fail (backend != NULL, NULL); - g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); - g_return_val_if_fail (ql != CORBA_OBJECT_NIL, NULL); - g_return_val_if_fail (sexp != NULL, NULL); - - priv = query->priv; - - CORBA_exception_init (&ev); - priv->ql = CORBA_Object_duplicate (ql, &ev); - if (ev._major != CORBA_NO_EXCEPTION) { - g_message ("query_construct(): Could not duplicate the listener"); - priv->ql = CORBA_OBJECT_NIL; - CORBA_exception_free (&ev); - return NULL; - } - CORBA_exception_free (&ev); - - priv->backend = backend; - gtk_object_ref (GTK_OBJECT (priv->backend)); - - gtk_signal_connect (GTK_OBJECT (priv->backend), "obj_updated", - GTK_SIGNAL_FUNC (backend_obj_updated_cb), - query); - gtk_signal_connect (GTK_OBJECT (priv->backend), "obj_removed", - GTK_SIGNAL_FUNC (backend_obj_removed_cb), - query); - - priv->sexp = g_strdup (sexp); - - /* Queue the query to be started asynchronously */ - - if (cal_backend_is_loaded (priv->backend)) { - g_assert (priv->idle_id == 0); - priv->idle_id = g_idle_add (start_query_cb, query); - } else - gtk_signal_connect (GTK_OBJECT (priv->backend), "opened", - GTK_SIGNAL_FUNC (backend_opened_cb), - query); - - return query; -} - -/** - * query_new: - * @backend: Calendar backend that the query object will monitor. - * @ql: Listener for query results. - * @sexp: Sexp that defines the query. - * - * Creates a new query engine object that monitors a calendar backend. - * - * Return value: A newly-created query object, or NULL on failure. - **/ -Query * -query_new (CalBackend *backend, - GNOME_Evolution_Calendar_QueryListener ql, - const char *sexp) -{ - Query *query; - - query = QUERY (gtk_type_new (QUERY_TYPE)); - if (!query_construct (query, backend, ql, sexp)) { - bonobo_object_unref (BONOBO_OBJECT (query)); - return NULL; - } - - return query; -} |