static void
inf_text_default_delete_operation_apply(InfAdoptedOperation* operation,
InfAdoptedUser* by,
InfBuffer* buffer)
{
InfTextDefaultDeleteOperationPrivate* priv;
g_assert(INF_TEXT_IS_DEFAULT_DELETE_OPERATION(operation));
g_assert(INF_TEXT_IS_BUFFER(buffer));
priv = INF_TEXT_DEFAULT_DELETE_OPERATION_PRIVATE(operation);
#ifdef DELETE_OPERATION_CHECK_TEXT_MATCH
g_assert(
inf_text_default_delete_operation_text_match(
INF_TEXT_DEFAULT_DELETE_OPERATION(operation),
INF_TEXT_BUFFER(buffer)
)
);
#endif /* DELETE_OPERATION_CHECK_TEXT_MATCH */
inf_text_buffer_erase_text(
INF_TEXT_BUFFER(buffer),
priv->position,
inf_text_chunk_get_length(priv->chunk),
INF_USER(by)
);
}
static void
infinoted_plugin_document_stream_text_erased_cb(InfTextBuffer* buffer,
guint pos,
InfTextChunk* chunk,
InfUser* user,
gpointer user_data)
{
InfinotedPluginDocumentStreamStream* stream;
guint32 comm;
guint32 pos32;
guint32 len32;
gboolean alive;
stream = (InfinotedPluginDocumentStreamStream*)user_data;
comm = 4; /* ERASE */
pos32 = (guint32)pos;
len32 = inf_text_chunk_get_length(chunk);
alive = infinoted_plugin_document_stream_send(stream, &comm, 4);
if(alive)
alive = infinoted_plugin_document_stream_send(stream, &pos32, 4);
if(alive)
alive = infinoted_plugin_document_stream_send(stream, &len32, 4);
}
static guint
inf_text_default_delete_operation_get_length(
InfTextDeleteOperation* operation)
{
return inf_text_chunk_get_length(
INF_TEXT_DEFAULT_DELETE_OPERATION_PRIVATE(operation)->chunk
);
}
static guint
inf_text_default_insert_operation_get_length(
InfTextInsertOperation* operation)
{
return inf_text_chunk_get_length(
INF_TEXT_DEFAULT_INSERT_OPERATION_PRIVATE(operation)->chunk
);
}
/* TODO: Merge adjacent text chunks */
static GSList*
inf_text_remote_delete_operation_recon_feed(GSList* recon_list,
guint position,
InfTextChunk* chunk)
{
GSList* item;
InfTextRemoteDeleteOperationRecon* recon;
GSList* new_list;
GSList* last;
InfTextRemoteDeleteOperationRecon* new_recon;
guint text_pos;
guint cur_len;
guint text_len;
new_list = NULL;
text_pos = 0;
cur_len = 0;
for(item = recon_list; item != NULL; item = g_slist_next(item))
{
recon = (InfTextRemoteDeleteOperationRecon*)item->data;
if(position + text_pos + cur_len < recon->position &&
text_pos < inf_text_chunk_get_length(chunk))
{
text_len = recon->position - position - text_pos - cur_len;
if(text_len > inf_text_chunk_get_length(chunk) - text_pos)
text_len = inf_text_chunk_get_length(chunk) - text_pos;
new_recon = g_slice_new(InfTextRemoteDeleteOperationRecon);
new_recon->position = position + text_pos + cur_len;
new_recon->chunk = inf_text_chunk_substring(chunk, text_pos, text_len);
new_list = g_slist_append_fast(new_list, &last, new_recon);
text_pos += text_len;
}
cur_len += inf_text_chunk_get_length(recon->chunk);
new_recon = g_slice_new(InfTextRemoteDeleteOperationRecon);
new_recon->position = recon->position;
new_recon->chunk = inf_text_chunk_copy(recon->chunk);
new_list = g_slist_append_fast(new_list, &last, new_recon);
}
if(text_pos < inf_text_chunk_get_length(chunk))
{
new_recon = g_slice_new(InfTextRemoteDeleteOperationRecon);
new_recon->position = position + text_pos + cur_len;
new_recon->chunk = inf_text_chunk_substring(
chunk,
text_pos,
inf_text_chunk_get_length(chunk) - text_pos
);
new_list = g_slist_append_fast(new_list, &last, new_recon);
}
return new_list;
}
static InfAdoptedSplitOperation*
inf_text_default_delete_operation_transform_split(
InfTextDeleteOperation* operation,
guint split_pos,
guint split_len)
{
InfTextDefaultDeleteOperationPrivate* priv;
InfTextChunk* first_chunk;
InfTextChunk* second_chunk;
GObject* first;
GObject* second;
InfAdoptedSplitOperation* result;
priv = INF_TEXT_DEFAULT_DELETE_OPERATION_PRIVATE(operation);
first_chunk = inf_text_chunk_substring(priv->chunk, 0, split_pos);
second_chunk = inf_text_chunk_substring(
priv->chunk,
split_pos,
inf_text_chunk_get_length(priv->chunk) - split_pos
);
first = g_object_new(
INF_TEXT_TYPE_DEFAULT_DELETE_OPERATION,
"position", priv->position,
"chunk", first_chunk,
NULL
);
second = g_object_new(
INF_TEXT_TYPE_DEFAULT_DELETE_OPERATION,
"position", priv->position + split_pos + split_len,
"chunk", second_chunk,
NULL
);
inf_text_chunk_free(first_chunk);
inf_text_chunk_free(second_chunk);
result = inf_adopted_split_operation_new(
INF_ADOPTED_OPERATION(first),
INF_ADOPTED_OPERATION(second)
);
g_object_unref(first);
g_object_unref(second);
return result;
}
static void
inf_test_text_recover_text_erased_cb(InfTextBuffer* buffer,
guint pos,
InfTextChunk* chunk,
InfUser* user,
gpointer user_data)
{
InfAdoptedOperation* operation;
guint len;
InfTextChunk* print_chunk;
gsize print_bytes;
gpointer print_text;
/* If the document has substantial content and this deletes most of it,
* then print out the document here. */
len = inf_text_chunk_get_length(chunk);
if(inf_text_buffer_get_length(buffer) + len >= 50)
{
if(len >= (inf_text_buffer_get_length(buffer) + len)*75/100)
{
if(*(int*)user_data == 0)
{
print_chunk = inf_text_buffer_get_slice(
buffer,
0,
inf_text_buffer_get_length(buffer)
);
inf_text_chunk_insert_chunk(print_chunk, pos, chunk);
print_text = inf_text_chunk_get_text(print_chunk, &print_bytes);
inf_text_chunk_free(print_chunk);
printf("%.*s\n", (int)print_bytes, (gchar*)print_text);
g_free(print_text);
}
--*(int*)user_data;
}
}
g_object_unref(buffer);
}
static gboolean
inf_text_default_delete_operation_text_match(
InfTextDefaultDeleteOperation* operation,
InfTextBuffer* buffer)
{
InfTextDefaultDeleteOperationPrivate* priv;
InfTextChunk* chunk;
gchar* first;
gchar* second;
gsize first_len;
gsize second_len;
int result;
priv = INF_TEXT_DEFAULT_DELETE_OPERATION_PRIVATE(operation);
/* TODO: inf_text_chunk_cmp_substring */
chunk = inf_text_buffer_get_slice(
buffer,
priv->position,
inf_text_chunk_get_length(priv->chunk)
);
first = inf_text_chunk_get_text(priv->chunk, &first_len);
second = inf_text_chunk_get_text(chunk, &second_len);
inf_text_chunk_free(chunk);
/* TODO: Owners must match, too */
if(first_len == second_len)
result = memcmp(first, second, first_len);
else
result = 1; /* != 0 */
g_free(second);
g_free(first);
return result == 0;
}
static InfAdoptedSplitOperation*
inf_text_remote_delete_operation_transform_split(
InfTextDeleteOperation* operation,
guint split_pos,
guint split_len)
{
/* Need to split the delete operation and the recon list */
InfTextRemoteDeleteOperationPrivate* priv;
InfAdoptedSplitOperation* result;
GObject* first_operation;
GObject* second_operation;
InfTextRemoteDeleteOperationPrivate* result_priv;
InfTextRemoteDeleteOperationRecon* recon;
InfTextRemoteDeleteOperationRecon* new_recon;
GSList* first_recon;
GSList* second_recon;
guint recon_cur_len;
GSList* item;
priv = INF_TEXT_REMOTE_DELETE_OPERATION_PRIVATE(operation);
first_recon = NULL;
second_recon = NULL;
recon_cur_len = 0;
for(item = priv->recon; item != NULL; item = g_slist_next(item))
{
recon = (InfTextRemoteDeleteOperationRecon*)item->data;
g_assert(recon->position >= recon_cur_len);
if(recon->position - recon_cur_len <= split_pos)
{
new_recon = g_slice_new(InfTextRemoteDeleteOperationRecon);
new_recon->position = recon->position;
new_recon->chunk = inf_text_chunk_copy(recon->chunk);
first_recon = g_slist_prepend(first_recon, new_recon);
recon_cur_len += inf_text_chunk_get_length(recon->chunk);
}
else
{
new_recon = g_slice_new(InfTextRemoteDeleteOperationRecon);
new_recon->position = recon->position - (split_pos + recon_cur_len);
new_recon->chunk = inf_text_chunk_copy(recon->chunk);
second_recon = g_slist_prepend(second_recon, new_recon);
}
}
first_operation = g_object_new(
INF_TEXT_TYPE_REMOTE_DELETE_OPERATION,
"position", priv->position,
"length", split_pos,
NULL
);
second_operation = g_object_new(
INF_TEXT_TYPE_REMOTE_DELETE_OPERATION,
"position", priv->position + split_len,
"length", priv->length - split_pos,
NULL
);
result_priv = INF_TEXT_REMOTE_DELETE_OPERATION_PRIVATE(first_operation);
result_priv->recon = g_slist_reverse(first_recon);
result_priv->recon_offset = priv->recon_offset;
result_priv = INF_TEXT_REMOTE_DELETE_OPERATION_PRIVATE(second_operation);
result_priv->recon = g_slist_reverse(second_recon);
result_priv->recon_offset = priv->recon_offset + split_pos + recon_cur_len;
result = inf_adopted_split_operation_new(
INF_ADOPTED_OPERATION(first_operation),
INF_ADOPTED_OPERATION(second_operation)
);
g_object_unref(G_OBJECT(second_operation));
g_object_unref(G_OBJECT(first_operation));
return result;
}
static InfAdoptedOperation*
inf_text_remote_delete_operation_apply_transformed(InfAdoptedOperation* op,
InfAdoptedOperation* trans,
InfAdoptedUser* by,
InfBuffer* buffer,
GError** error)
{
InfTextRemoteDeleteOperationPrivate* priv;
InfTextChunk* chunk;
InfTextChunk* temp_slice;
GSList* list;
GSList* item;
InfAdoptedOperation* operation;
GSList* recon_list;
GSList* recon_item;
InfTextRemoteDeleteOperationRecon* recon;
InfTextDefaultDeleteOperation* result;
g_assert(INF_TEXT_IS_REMOTE_DELETE_OPERATION(op));
g_assert(INF_TEXT_IS_BUFFER(buffer));
/* TODO: We can probably optimize this function, but then we should
* a) profile it and b) in many cases input parameters to this function
* are trivial anyway. */
if(INF_ADOPTED_IS_SPLIT_OPERATION(trans))
{
list = inf_adopted_split_operation_unsplit(
INF_ADOPTED_SPLIT_OPERATION(trans)
);
}
else
{
list = g_slist_prepend(NULL, trans);
}
chunk = inf_text_chunk_new(
inf_text_buffer_get_encoding(INF_TEXT_BUFFER(buffer))
);
/* We assume the list of remote delete operations to be in order */
for(item = list; item != NULL; item = g_slist_next(item))
{
g_assert(INF_TEXT_IS_REMOTE_DELETE_OPERATION(item->data));
priv = INF_TEXT_REMOTE_DELETE_OPERATION_PRIVATE(item->data);
operation = INF_ADOPTED_OPERATION(item->data);
if(priv->length > 0)
{
temp_slice = inf_text_buffer_get_slice(
INF_TEXT_BUFFER(buffer),
priv->position,
priv->length
);
recon_list = inf_text_remote_delete_operation_recon_feed(
priv->recon,
0,
temp_slice
);
inf_text_chunk_free(temp_slice);
}
else
{
recon_list = priv->recon;
}
for(recon_item = recon_list;
recon_item != NULL;
recon_item = g_slist_next(recon_item))
{
recon = (InfTextRemoteDeleteOperationRecon*)recon_item->data;
g_assert(priv->recon_offset + recon->position ==
inf_text_chunk_get_length(chunk));
inf_text_chunk_insert_chunk(
chunk,
inf_text_chunk_get_length(chunk),
recon->chunk
);
}
/* Free recon list if newly allocated */
if(priv->length > 0)
inf_text_remote_delete_operation_recon_free(recon_list);
if(!inf_adopted_operation_apply(operation, by, buffer, error))
{
g_slist_free(list);
inf_text_chunk_free(chunk);
return NULL;
}
}
g_slist_free(list);
priv = INF_TEXT_REMOTE_DELETE_OPERATION_PRIVATE(op);
result = inf_text_default_delete_operation_new(priv->position, chunk);
inf_text_chunk_free(chunk);
return INF_ADOPTED_OPERATION(result);
}
