+++ /dev/null
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/*
- * ev-metadata-manager.c
- * This file is part of ev
- *
- * Copyright (C) 2003 Paolo Maggi
- *
- * 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.
- */
-
-/*
- * Modified by the ev Team, 2003. See the AUTHORS file for a
- * list of people on the ev Team.
- * See the ChangeLog files for a list of changes.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <time.h>
-#include <stdlib.h>
-
-#include <libxml/xmlreader.h>
-
-#include "ev-metadata-manager.h"
-#include "ev-application.h"
-#include "ev-file-helpers.h"
-
-#define METADATA_FILE "ev-metadata.xml"
-
-#define MAX_ITEMS 50
-
-typedef struct _EvMetadataManager EvMetadataManager;
-
-typedef struct _Item Item;
-
-struct _Item
-{
- time_t atime; /* time of last access */
-
- GHashTable *values;
-};
-
-struct _EvMetadataManager
-{
- gboolean values_loaded; /* It is true if the file
- has been read */
-
- guint timeout_id;
-
- GHashTable *items;
-};
-
-static gboolean ev_metadata_manager_save (gpointer data);
-
-
-static EvMetadataManager *ev_metadata_manager = NULL;
-
-/**
- * item_free:
- * @data: a pointer to a #Item data
- *
- * It does free the values on the #GHashTable where data points.
- */
-static void
-item_free (gpointer data)
-{
- Item *item = (Item *) data;
-
- if (item->values != NULL)
- g_hash_table_destroy (item->values);
-
- g_slice_free (Item, item);
-}
-
-/**
- * ev_metadata_arm_timeout
- *
- * Setup a timeout for saving the metadata to disk.
- */
-static void
-ev_metadata_arm_timeout(void)
-{
- if (ev_metadata_manager->timeout_id)
- return;
-
- ev_metadata_manager->timeout_id =
- g_timeout_add_seconds_full (G_PRIORITY_DEFAULT_IDLE,
- 2,
- (GSourceFunc)ev_metadata_manager_save,
- NULL,
- NULL);
-}
-
-/**
- * ev_metadata_manager_init:
- *
- * Creates an EvMetadataManager with default values.
- *
- * values_loaded -> %FALSE.
- * timeout_id -> the id of the event source.
- * items -> a new full empty #GHashTable.
- */
-void
-ev_metadata_manager_init (void)
-{
- ev_metadata_manager = g_slice_new0 (EvMetadataManager);
-
- ev_metadata_manager->values_loaded = FALSE;
-
- ev_metadata_manager->items =
- g_hash_table_new_full (g_str_hash,
- g_str_equal,
- g_free,
- item_free);
-}
-
-/* This function must be called before exiting ev */
-void
-ev_metadata_manager_shutdown (void)
-{
- if (ev_metadata_manager == NULL)
- return;
-
- if (ev_metadata_manager->timeout_id) {
- g_source_remove (ev_metadata_manager->timeout_id);
- ev_metadata_manager->timeout_id = 0;
- ev_metadata_manager_save (NULL);
- }
-
- if (ev_metadata_manager->items != NULL)
- g_hash_table_destroy (ev_metadata_manager->items);
-
- g_slice_free (EvMetadataManager, ev_metadata_manager);
- ev_metadata_manager = NULL;
-}
-
-static void
-value_free (gpointer data)
-{
- GValue *value = (GValue *)data;
-
- g_value_unset (value);
- g_slice_free (GValue, value);
-}
-
-static GValue *
-parse_value (xmlChar *value, xmlChar *type)
-{
- GType ret_type;
- GValue *ret;
-
- ret_type = g_type_from_name ((char *)type);
- ret = g_slice_new0 (GValue);
- g_value_init (ret, ret_type);
-
- switch (ret_type) {
- case G_TYPE_STRING:
- g_value_set_string (ret, (char *)value);
- break;
- case G_TYPE_INT:
- g_value_set_int (ret, g_ascii_strtoull ((char *)value, NULL, 0));
- break;
- case G_TYPE_DOUBLE:
- g_value_set_double (ret, g_ascii_strtod ((char *)value, NULL));
- break;
- case G_TYPE_BOOLEAN:
- g_value_set_boolean (ret, g_ascii_strtoull ((char *)value, NULL, 0));
- break;
- }
-
- return ret;
-}
-
-static void
-parseItem (xmlDocPtr doc, xmlNodePtr cur)
-{
- Item *item;
-
- xmlChar *uri;
- xmlChar *atime;
-
- if (xmlStrcmp (cur->name, (const xmlChar *)"document") != 0)
- return;
-
- uri = xmlGetProp (cur, (const xmlChar *)"uri");
- if (uri == NULL)
- return;
-
- atime = xmlGetProp (cur, (const xmlChar *)"atime");
- if (atime == NULL)
- {
- xmlFree (uri);
- return;
- }
-
- item = g_slice_new0 (Item);
-
- item->atime = g_ascii_strtoull((char*)atime, NULL, 0);
-
- item->values = g_hash_table_new_full (g_str_hash,
- g_str_equal,
- g_free,
- value_free);
-
- cur = cur->xmlChildrenNode;
-
- while (cur != NULL)
- {
- if (xmlStrcmp (cur->name, (const xmlChar *)"entry") == 0)
- {
- xmlChar *key;
- xmlChar *xml_value;
- xmlChar *type;
- GValue *value;
-
- key = xmlGetProp (cur, (const xmlChar *)"key");
- xml_value = xmlGetProp (cur, (const xmlChar *)"value");
- type = xmlGetProp (cur, (const xmlChar *)"type");
- value = parse_value (xml_value, type);
-
- if ((key != NULL) && (value != NULL))
- g_hash_table_insert (item->values,
- xmlStrdup (key),
- value);
-
- if (key != NULL)
- xmlFree (key);
- if (type != NULL)
- xmlFree (type);
- if (xml_value != NULL)
- xmlFree (xml_value);
- }
-
- cur = cur->next;
- }
-
- g_hash_table_insert (ev_metadata_manager->items,
- xmlStrdup (uri),
- item);
-
- xmlFree (uri);
- xmlFree (atime);
-}
-
-static gboolean
-load_values ()
-{
- xmlDocPtr doc;
- xmlNodePtr cur;
- gchar *file_name;
-
- g_return_val_if_fail (ev_metadata_manager != NULL, FALSE);
- g_return_val_if_fail (ev_metadata_manager->values_loaded == FALSE, FALSE);
-
- ev_metadata_manager->values_loaded = TRUE;
-
- xmlKeepBlanksDefault (0);
-
- /* FIXME: file locking - Paolo */
- file_name = g_build_filename (ev_application_get_dot_dir (EV_APP), METADATA_FILE, NULL);
- if (!g_file_test (file_name, G_FILE_TEST_EXISTS))
- {
- g_free (file_name);
- return FALSE;
- }
-
- doc = xmlParseFile (file_name);
- g_free (file_name);
-
- if (doc == NULL)
- {
- return FALSE;
- }
-
- cur = xmlDocGetRootElement (doc);
- if (cur == NULL)
- {
- g_message ("The metadata file “%s” is empty", METADATA_FILE);
- xmlFreeDoc (doc);
-
- return FALSE;
- }
-
- if (xmlStrcmp (cur->name, (const xmlChar *) "metadata"))
- {
- g_message ("File “%s” is of the wrong type", METADATA_FILE);
- xmlFreeDoc (doc);
-
- return FALSE;
- }
-
- cur = xmlDocGetRootElement (doc);
- cur = cur->xmlChildrenNode;
-
- while (cur != NULL)
- {
- parseItem (doc, cur);
-
- cur = cur->next;
- }
-
- xmlFreeDoc (doc);
-
- return TRUE;
-}
-
-#define LAST_URI "last-used-value"
-
-static gboolean
-ev_metadata_manager_get_last (const gchar *key,
- GValue *value,
- gboolean ignore)
-{
- Item *item;
- GValue *ret;
-
- g_assert (ev_metadata_manager->values_loaded);
-
- if (ignore)
- return FALSE;
-
- item = (Item *)g_hash_table_lookup (ev_metadata_manager->items,
- LAST_URI);
-
- if (item == NULL)
- return FALSE;
-
- item->atime = time (NULL);
-
- if (item->values == NULL)
- return FALSE;
-
- ret = (GValue *)g_hash_table_lookup (item->values, key);
-
- if (ret != NULL) {
- g_value_init (value, G_VALUE_TYPE (ret));
- g_value_copy (ret, value);
- return TRUE;
- }
-
- return FALSE;
-}
-
-static void
-ev_metadata_manager_set_last (const gchar *key,
- const GValue *value)
-{
- Item *item;
-
- g_assert (ev_metadata_manager->values_loaded);
-
- item = (Item *)g_hash_table_lookup (ev_metadata_manager->items,
- LAST_URI);
-
- if (item == NULL)
- {
- item = g_slice_new0 (Item);
-
- g_hash_table_insert (ev_metadata_manager->items,
- g_strdup (LAST_URI),
- item);
- }
-
- if (item->values == NULL)
- item->values = g_hash_table_new_full (g_str_hash,
- g_str_equal,
- g_free,
- value_free);
- if (value != NULL) {
- GValue *new;
-
- new = g_slice_new0 (GValue);
- g_value_init (new, G_VALUE_TYPE (value));
- g_value_copy (value, new);
-
- g_hash_table_insert (item->values,
- g_strdup (key),
- new);
- } else {
- g_hash_table_remove (item->values,
- key);
- }
-
- item->atime = time (NULL);
- ev_metadata_arm_timeout ();
- return;
-}
-
-/**
- * ev_metadata_manager_get:
- * @uri: Uri to set data for, if @NULL, we return default value
- * @key: Key to set uri
- * @value: GValue struct filled up with value
- * @ignore_last: if @TRUE, default value is ignored
- *
- * Retrieve value for uri in metadata database
- *
- * Returns: @TRUE if value was taken.
- **/
-gboolean
-ev_metadata_manager_get (const gchar *uri,
- const gchar *key,
- GValue *value,
- gboolean ignore_last)
-{
- Item *item;
- GValue *ret;
-
- g_return_val_if_fail (key != NULL, FALSE);
-
- if (ev_metadata_manager == NULL)
- return FALSE;
-
- if (!ev_metadata_manager->values_loaded)
- {
- gboolean res;
-
- res = load_values ();
-
- if (!res)
- return ev_metadata_manager_get_last (key, value, ignore_last);
- }
-
- if (uri == NULL)
- return ev_metadata_manager_get_last (key, value, ignore_last);
-
- item = (Item *)g_hash_table_lookup (ev_metadata_manager->items,
- uri);
-
- if (item == NULL)
- return ev_metadata_manager_get_last (key, value, ignore_last);
-
- item->atime = time (NULL);
-
- if (item->values == NULL)
- return ev_metadata_manager_get_last (key, value, ignore_last);
-
- ret = (GValue *)g_hash_table_lookup (item->values, key);
-
- if (ret != NULL) {
- g_value_init (value, G_VALUE_TYPE (ret));
- g_value_copy (ret, value);
- return TRUE;
- }
-
- return ev_metadata_manager_get_last (key, value, ignore_last);
-}
-
-/**
- * ev_metadata_manager_set:
- * @uri: Uri to set data for, if @NULL, we set default value
- * @key: Key to set uri
- * @value: GValue struct containing value
- *
- * Set value for key in metadata database
- **/
-void
-ev_metadata_manager_set (const gchar *uri,
- const gchar *key,
- const GValue *value)
-{
- Item *item;
-
- g_return_if_fail (key != NULL);
-
- if (ev_metadata_manager == NULL)
- return;
-
- if (!ev_metadata_manager->values_loaded)
- {
- gboolean res;
-
- res = load_values ();
-
- if (!res)
- return;
- }
-
- if (uri == NULL)
- {
- ev_metadata_manager_set_last (key, value);
- return;
- }
-
- item = (Item *)g_hash_table_lookup (ev_metadata_manager->items,
- uri);
-
- if (item == NULL)
- {
- item = g_slice_new0 (Item);
-
- g_hash_table_insert (ev_metadata_manager->items,
- g_strdup (uri),
- item);
- }
-
- if (item->values == NULL)
- item->values = g_hash_table_new_full (g_str_hash,
- g_str_equal,
- g_free,
- value_free);
- if (value != NULL) {
- GValue *new;
-
- new = g_slice_new0 (GValue);
- g_value_init (new, G_VALUE_TYPE (value));
- g_value_copy (value, new);
-
- g_hash_table_insert (item->values,
- g_strdup (key),
- new);
- ev_metadata_manager_set_last (key, value);
- } else {
- g_hash_table_remove (item->values,
- key);
- }
-
- item->atime = time (NULL);
-
- ev_metadata_arm_timeout ();
-}
-
-static void
-save_values (const gchar *key, GValue *value, xmlNodePtr parent)
-{
- char *string_value;
- xmlNodePtr xml_node;
-
- g_return_if_fail (key != NULL);
-
- if (value == NULL)
- return;
-
- xml_node = xmlNewChild (parent, NULL, (const xmlChar *)"entry", NULL);
-
- xmlSetProp (xml_node, (const xmlChar *)"key", (const xmlChar *)key);
- xmlSetProp (xml_node,
- (const xmlChar *)"type",
- (const xmlChar *)g_type_name (G_VALUE_TYPE (value)));
-
- switch (G_VALUE_TYPE (value)) {
- case G_TYPE_STRING:
- string_value = g_value_dup_string (value);
- break;
- case G_TYPE_INT:
- string_value = g_strdup_printf ("%d", g_value_get_int (value));
- break;
- case G_TYPE_DOUBLE:
- {
- gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
- g_ascii_dtostr (buf, G_ASCII_DTOSTR_BUF_SIZE, g_value_get_double (value));
- string_value = g_strdup (buf);
- }
- break;
- case G_TYPE_BOOLEAN:
- string_value = g_strdup_printf ("%d", g_value_get_boolean (value));
- break;
- default:
- string_value = NULL;
- g_assert_not_reached ();
- }
-
- xmlSetProp (xml_node, (const xmlChar *)"value", (const xmlChar *)string_value);
-
- g_free (string_value);
-}
-
-static void
-save_item (const gchar *key, const gpointer *data, xmlNodePtr parent)
-{
- xmlNodePtr xml_node;
- const Item *item = (const Item *)data;
- gchar *atime;
-
- g_return_if_fail (key != NULL);
-
- if (item == NULL)
- return;
-
- xml_node = xmlNewChild (parent, NULL, (const xmlChar *)"document", NULL);
-
- xmlSetProp (xml_node, (const xmlChar *)"uri", (const xmlChar *)key);
-
- atime = g_strdup_printf ("%ld", item->atime);
- xmlSetProp (xml_node, (const xmlChar *)"atime", (const xmlChar *)atime);
- g_free (atime);
-
- g_hash_table_foreach (item->values,
- (GHFunc)save_values, xml_node);
-}
-
-static void
-get_oldest (const gchar *key, const gpointer value, const gchar ** key_to_remove)
-{
- const Item *item = (const Item *)value;
-
- if (*key_to_remove == NULL)
- {
- *key_to_remove = key;
- }
- else
- {
- const Item *item_to_remove =
- g_hash_table_lookup (ev_metadata_manager->items,
- *key_to_remove);
-
- g_return_if_fail (item_to_remove != NULL);
-
- if (item->atime < item_to_remove->atime)
- {
- *key_to_remove = key;
- }
- }
-}
-
-static void
-resize_items ()
-{
- while (g_hash_table_size (ev_metadata_manager->items) > MAX_ITEMS)
- {
- gpointer key_to_remove = NULL;
-
- g_hash_table_foreach (ev_metadata_manager->items,
- (GHFunc)get_oldest,
- &key_to_remove);
-
- g_return_if_fail (key_to_remove != NULL);
-
- g_hash_table_remove (ev_metadata_manager->items,
- key_to_remove);
- }
-}
-
-static gboolean
-ev_metadata_manager_save (gpointer data)
-{
- xmlDocPtr doc;
- xmlNodePtr root;
- gchar *file_name;
-
- ev_metadata_manager->timeout_id = 0;
-
- resize_items ();
-
- xmlIndentTreeOutput = TRUE;
-
- doc = xmlNewDoc ((const xmlChar *)"1.0");
- if (doc == NULL)
- return TRUE;
-
- /* Create metadata root */
- root = xmlNewDocNode (doc, NULL, (const xmlChar *)"metadata", NULL);
- xmlDocSetRootElement (doc, root);
-
- g_hash_table_foreach (ev_metadata_manager->items,
- (GHFunc)save_item, root);
-
- /* FIXME: lock file - Paolo */
- file_name = g_build_filename (ev_application_get_dot_dir (EV_APP), METADATA_FILE, NULL);
- xmlSaveFormatFile (file_name, doc, 1);
- g_free (file_name);
-
- xmlFreeDoc (doc);
-
- return FALSE;
-}
-
-void
-ev_metadata_manager_set_int (const gchar *uri, const gchar *key, int value)
-{
- GValue val = { 0, };
-
- g_value_init (&val, G_TYPE_INT);
- g_value_set_int (&val, value);
-
- ev_metadata_manager_set (uri, key, &val);
-
- g_value_unset (&val);
-}
-
-void
-ev_metadata_manager_set_double (const gchar *uri, const gchar *key, double value)
-{
- GValue val = { 0, };
-
- g_value_init (&val, G_TYPE_DOUBLE);
- g_value_set_double (&val, value);
-
- ev_metadata_manager_set (uri, key, &val);
-
- g_value_unset (&val);
-}
-
-void
-ev_metadata_manager_set_string (const gchar *uri, const gchar *key, const gchar *value)
-{
- GValue val = { 0, };
-
- g_value_init (&val, G_TYPE_STRING);
- g_value_set_static_string (&val, value);
-
- ev_metadata_manager_set (uri, key, &val);
-
- g_value_unset (&val);
-}
-
-void
-ev_metadata_manager_set_boolean (const gchar *uri, const gchar *key, gboolean value)
-{
- GValue val = { 0, };
-
- g_value_init (&val, G_TYPE_BOOLEAN);
- g_value_set_boolean (&val, value);
-
- ev_metadata_manager_set (uri, key, &val);
-
- g_value_unset (&val);
-}
https://www.fi.muni.cz/~kas/git / evince.git / commitdiff