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authorJon Trowbridge <trow@ximian.com>2001-03-18 11:04:54 +0800
committerJon Trowbridge <trow@src.gnome.org>2001-03-18 11:04:54 +0800
commit36c7b8c8ff6c8c711058788ff91a586527280e39 (patch)
treef88231b873cb274cd9f3f88ddbf49167d869aa29
parentbe6335128da92389defd81dc58132387f1f400d8 (diff)
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Tag all queued ops. (e_book_cancel_op): Added. Search for a pending op
2001-03-17 Jon Trowbridge <trow@ximian.com> * backend/ebook/e-book.c (e_book_queue_op): Tag all queued ops. (e_book_cancel_op): Added. Search for a pending op with a given tag, and mark it as inactive. (e_book_do_response_get_cursor): Don't execute callback if this operations has been cancelled. (e_book_do_response_get_view): Ditto. (e_book_do_response_get_changes): Ditto. (e_book_do_response_get_supported_fields): Ditto. (e_book_get_supported_fields): Return an operation tag (that can be used to cancel the operation) rather than just TRUE/FALSE. Zero is always an invalid tag and is returned in the case of an error, so this shouldn't break any code that looked at the return value (unless it did so in a particularly stupid way, of course). (e_book_get_cursor): Ditto. (e_book_get_book_view): Ditto. (e_book_get_changes): Ditto. (e_book_cancel): Added. Cancel a pending operation. (Basically a call to e_book_cancel_op with error checking, etc.) * backend/ebook/e-book-types.h: Added E_BOOK_STATUS_CANCELLED. svn path=/trunk/; revision=8790
-rw-r--r--addressbook/ChangeLog24
-rw-r--r--addressbook/backend/ebook/e-book-types.h1
-rw-r--r--addressbook/backend/ebook/e-book.c134
-rw-r--r--addressbook/backend/ebook/e-book.h13
4 files changed, 129 insertions, 43 deletions
diff --git a/addressbook/ChangeLog b/addressbook/ChangeLog
index 5a8780b1d4..f02ccf7161 100644
--- a/addressbook/ChangeLog
+++ b/addressbook/ChangeLog
@@ -1,3 +1,26 @@
+2001-03-17 Jon Trowbridge <trow@ximian.com>
+
+ * backend/ebook/e-book.c (e_book_queue_op): Tag all queued ops.
+ (e_book_cancel_op): Added. Search for a pending op with a given
+ tag, and mark it as inactive.
+ (e_book_do_response_get_cursor): Don't execute callback if this
+ operations has been cancelled.
+ (e_book_do_response_get_view): Ditto.
+ (e_book_do_response_get_changes): Ditto.
+ (e_book_do_response_get_supported_fields): Ditto.
+ (e_book_get_supported_fields): Return an operation tag (that can
+ be used to cancel the operation) rather than just TRUE/FALSE.
+ Zero is always an invalid tag and is returned in the case of an
+ error, so this shouldn't break any code that looked at the return
+ value (unless it did so in a particularly stupid way, of course).
+ (e_book_get_cursor): Ditto.
+ (e_book_get_book_view): Ditto.
+ (e_book_get_changes): Ditto.
+ (e_book_cancel): Added. Cancel a pending operation. (Basically
+ a call to e_book_cancel_op with error checking, etc.)
+
+ * backend/ebook/e-book-types.h: Added E_BOOK_STATUS_CANCELLED.
+
2001-03-17 Chris Toshok <toshok@ximian.com>
* backend/ebook/e-book-listener.c
@@ -95,6 +118,7 @@
really nothing we can do to determine the extent of the access
afforded a user.)
+
2001-03-15 Jon Trowbridge <trow@ximian.com>
* gui/component/e-address-widget.c: Added addressbook querying and
diff --git a/addressbook/backend/ebook/e-book-types.h b/addressbook/backend/ebook/e-book-types.h
index 2ce1956080..d7eee35ede 100644
--- a/addressbook/backend/ebook/e-book-types.h
+++ b/addressbook/backend/ebook/e-book-types.h
@@ -23,6 +23,7 @@ typedef enum {
E_BOOK_STATUS_PERMISSION_DENIED,
E_BOOK_STATUS_CARD_NOT_FOUND,
E_BOOK_STATUS_PROTOCOL_NOT_SUPPORTED,
+ E_BOOK_STATUS_CANCELLED,
E_BOOK_STATUS_OTHER_ERROR
} EBookStatus;
diff --git a/addressbook/backend/ebook/e-book.c b/addressbook/backend/ebook/e-book.c
index 25fb42a37b..c603f94743 100644
--- a/addressbook/backend/ebook/e-book.c
+++ b/addressbook/backend/ebook/e-book.c
@@ -44,8 +44,7 @@ struct _EBookPrivate {
*/
GList *pending_ops;
- guint sq_tag;
- GList *sq_pending;
+ guint op_tag;
};
enum {
@@ -58,6 +57,8 @@ enum {
static guint e_book_signals [LAST_SIGNAL];
typedef struct {
+ guint tag;
+ gboolean active;
gpointer cb;
gpointer closure;
EBookViewListener *listener;
@@ -66,7 +67,7 @@ typedef struct {
/*
* Local response queue management.
*/
-static void
+static guint
e_book_queue_op (EBook *book,
gpointer cb,
gpointer closure,
@@ -75,12 +76,16 @@ e_book_queue_op (EBook *book,
EBookOp *op;
op = g_new0 (EBookOp, 1);
+ op->tag = book->priv->op_tag++;
+ op->active = TRUE;
op->cb = cb;
op->closure = closure;
op->listener = listener;
book->priv->pending_ops =
g_list_append (book->priv->pending_ops, op);
+
+ return op->tag;
}
static EBookOp *
@@ -104,6 +109,23 @@ e_book_pop_op (EBook *book)
return op;
}
+static gboolean
+e_book_cancel_op (EBook *book, guint tag)
+{
+ GList *iter;
+ gboolean cancelled = FALSE;
+
+ for (iter = book->priv->pending_ops; iter != NULL && !cancelled; iter = g_list_next (iter)) {
+ EBookOp *op = iter->data;
+ if (op->tag == tag) {
+ op->active = FALSE;
+ cancelled = TRUE;
+ }
+ }
+
+ return cancelled;
+}
+
static void
e_book_do_response_create_card (EBook *book,
EBookListenerResponse *resp)
@@ -161,8 +183,12 @@ e_book_do_response_get_cursor (EBook *book,
cursor = e_card_cursor_new(resp->cursor);
- if (op->cb)
- ((EBookCursorCallback) op->cb) (book, resp->status, cursor, op->closure);
+ if (op->cb) {
+ if (op->active)
+ ((EBookCursorCallback) op->cb) (book, resp->status, cursor, op->closure);
+ else
+ ((EBookCursorCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+ }
/*
* Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
@@ -209,12 +235,19 @@ e_book_do_response_get_view (EBook *book,
"in local op queue!\n");
return;
}
-
+
book_view = e_book_view_new(resp->book_view, op->listener);
- if (op->cb)
- ((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
-
+ /* Only execute the callback if the operation is still flagged as active (i.e. hasn't
+ been cancelled. This is mildly wasteful since we unnecessaryily create the
+ book_view, etc... but I'm leery of tinkering with the CORBA magic. */
+ if (op->cb) {
+ if (op->active)
+ ((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
+ else
+ ((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+ }
+
/*
* Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
*/
@@ -262,8 +295,12 @@ e_book_do_response_get_changes (EBook *book,
book_view = e_book_view_new (resp->book_view, op->listener);
- if (op->cb)
- ((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
+ if (op->cb) {
+ if (op->active)
+ ((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
+ else
+ ((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+ }
/*
* Release the remote GNOME_Evolution_Addressbook_BookView in the PAS.
@@ -358,8 +395,13 @@ e_book_do_response_get_supported_fields (EBook *book,
return;
}
- if (op->cb)
- ((EBookFieldsCallback) op->cb) (book, resp->status, resp->fields, op->closure);
+ if (op->cb) {
+ if (op->active)
+ ((EBookFieldsCallback) op->cb) (book, resp->status, resp->fields, op->closure);
+ else
+ ((EBookFieldsCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+ }
+
g_free (op);
}
@@ -559,7 +601,7 @@ e_book_get_static_capabilities (EBook *book)
return ret_val;
}
-gboolean
+guint
e_book_get_supported_fields (EBook *book,
EBookFieldsCallback cb,
gpointer closure)
@@ -570,7 +612,7 @@ e_book_get_supported_fields (EBook *book,
if (book->priv->load_state != URILoaded) {
g_warning ("e_book_unload_uri: No URI is loaded!\n");
- return FALSE;
+ return 0;
}
GNOME_Evolution_Addressbook_Book_getSupportedFields(book->priv->corba_book, &ev);
@@ -579,14 +621,12 @@ e_book_get_supported_fields (EBook *book,
g_warning ("e_book_get_supported_fields: Exception "
"during get_supported_fields!\n");
CORBA_exception_free (&ev);
- return FALSE;
+ return 0;
}
CORBA_exception_free (&ev);
- e_book_queue_op (book, cb, closure, NULL);
-
- return TRUE;
+ return e_book_queue_op (book, cb, closure, NULL);
}
static gboolean
@@ -1000,7 +1040,7 @@ e_book_check_connection (EBook *book)
return TRUE;
}
-gboolean
+guint
e_book_get_cursor (EBook *book,
gchar *query,
EBookCursorCallback cb,
@@ -1008,12 +1048,12 @@ e_book_get_cursor (EBook *book,
{
CORBA_Environment ev;
- g_return_val_if_fail (book != NULL, FALSE);
- g_return_val_if_fail (E_IS_BOOK (book), FALSE);
+ g_return_val_if_fail (book != NULL, 0);
+ g_return_val_if_fail (E_IS_BOOK (book), 0);
if (book->priv->load_state != URILoaded) {
g_warning ("e_book_check_connection: No URI loaded!\n");
- return FALSE;
+ return 0;
}
CORBA_exception_init (&ev);
@@ -1024,17 +1064,17 @@ e_book_get_cursor (EBook *book,
g_warning ("e_book_get_all_cards: Exception "
"querying list of cards!\n");
CORBA_exception_free (&ev);
- return FALSE;
+ return 0;
}
CORBA_exception_free (&ev);
- e_book_queue_op (book, cb, closure, NULL);
+ return e_book_queue_op (book, cb, closure, NULL);
return TRUE;
}
-gboolean
+guint
e_book_get_book_view (EBook *book,
gchar *query,
EBookBookViewCallback cb,
@@ -1043,12 +1083,12 @@ e_book_get_book_view (EBook *book,
CORBA_Environment ev;
EBookViewListener *listener;
- g_return_val_if_fail (book != NULL, FALSE);
- g_return_val_if_fail (E_IS_BOOK (book), FALSE);
+ g_return_val_if_fail (book != NULL, 0);
+ g_return_val_if_fail (E_IS_BOOK (book), 0);
if (book->priv->load_state != URILoaded) {
g_warning ("e_book_get_book_view: No URI loaded!\n");
- return FALSE;
+ return 0;
}
listener = e_book_view_listener_new();
@@ -1061,17 +1101,15 @@ e_book_get_book_view (EBook *book,
g_warning ("e_book_get_book_view: Exception "
"getting book_view!\n");
CORBA_exception_free (&ev);
- return FALSE;
+ return 0;
}
CORBA_exception_free (&ev);
- e_book_queue_op (book, cb, closure, listener);
-
- return TRUE;
+ return e_book_queue_op (book, cb, closure, listener);
}
-gboolean
+guint
e_book_get_changes (EBook *book,
gchar *changeid,
EBookBookViewCallback cb,
@@ -1080,8 +1118,8 @@ e_book_get_changes (EBook *book,
CORBA_Environment ev;
EBookViewListener *listener;
- g_return_val_if_fail (book != NULL, FALSE);
- g_return_val_if_fail (E_IS_BOOK (book), FALSE);
+ g_return_val_if_fail (book != NULL, 0);
+ g_return_val_if_fail (E_IS_BOOK (book), 0);
if (book->priv->load_state != URILoaded) {
g_warning ("e_book_get_changes: No URI loaded!\n");
@@ -1098,14 +1136,31 @@ e_book_get_changes (EBook *book,
g_warning ("e_book_changes: Exception "
"getting changes!\n");
CORBA_exception_free (&ev);
- return FALSE;
+ return 0;
}
CORBA_exception_free (&ev);
- e_book_queue_op (book, cb, closure, listener);
+ return e_book_queue_op (book, cb, closure, listener);
+}
- return TRUE;
+/**
+ * e_book_cancel
+ */
+
+void
+e_book_cancel (EBook *book, guint tag)
+{
+ g_return_if_fail (book != NULL);
+ g_return_if_fail (E_IS_BOOK (book));
+ g_return_if_fail (tag != 0);
+
+ /* In an attempt to be useful, we take a bit of extra care in reporting
+ errors. This might come in handy someday. */
+ if (tag >= book->priv->op_tag)
+ g_warning ("Attempt to cancel unassigned operation (%u)", tag);
+ else if (! e_book_cancel_op (book, tag))
+ g_warning ("Attempt to cancel unknown operation (%u)", tag);
}
/**
@@ -1154,6 +1209,7 @@ e_book_init (EBook *book)
{
book->priv = g_new0 (EBookPrivate, 1);
book->priv->load_state = URINotLoaded;
+ book->priv->op_tag = 1;
}
static void
diff --git a/addressbook/backend/ebook/e-book.h b/addressbook/backend/ebook/e-book.h
index 9e25c9d9a5..72efb7250c 100644
--- a/addressbook/backend/ebook/e-book.h
+++ b/addressbook/backend/ebook/e-book.h
@@ -62,7 +62,7 @@ void e_book_unload_uri (EBook *book);
char *e_book_get_static_capabilities (EBook *book);
-gboolean e_book_get_supported_fields (EBook *book,
+guint e_book_get_supported_fields (EBook *book,
EBookFieldsCallback cb,
gpointer closure);
@@ -112,21 +112,26 @@ gboolean e_book_commit_vcard (EBook *book,
/* Checking to see if we're connected to the card repository. */
gboolean e_book_check_connection (EBook *book);
-gboolean e_book_get_cursor (EBook *book,
+guint e_book_get_cursor (EBook *book,
char *query,
EBookCursorCallback cb,
gpointer closure);
-gboolean e_book_get_book_view (EBook *book,
+guint e_book_get_book_view (EBook *book,
char *query,
EBookBookViewCallback cb,
gpointer closure);
-gboolean e_book_get_changes (EBook *book,
+guint e_book_get_changes (EBook *book,
char *changeid,
EBookBookViewCallback cb,
gpointer closure);
+/* Cancel a pending operation. */
+void e_book_cancel (EBook *book,
+ guint tag);
+
+
/* Getting the name of the repository. */
char *e_book_get_name (EBook *book);