initial
This commit is contained in:
Perberos
391
gedit/gedit-document-output-stream.c
Executable file
391
gedit/gedit-document-output-stream.c
Executable file
@@ -0,0 +1,391 @@
|
||||
/*
|
||||
* gedit-document-output-stream.c
|
||||
* This file is part of gedit
|
||||
*
|
||||
* Copyright (C) 2010 - Ignacio Casal Quinteiro
|
||||
*
|
||||
* gedit 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.
|
||||
*
|
||||
* gedit 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 gedit; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor,
|
||||
* Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include <string.h>
|
||||
#include <glib.h>
|
||||
#include <glib/gi18n.h>
|
||||
#include <gio/gio.h>
|
||||
#include "gedit-document-output-stream.h"
|
||||
|
||||
/* NOTE: never use async methods on this stream, the stream is just
|
||||
* a wrapper around GtkTextBuffer api so that we can use GIO Stream
|
||||
* methods, but the undelying code operates on a GtkTextBuffer, so
|
||||
* there is no I/O involved and should be accessed only by the main
|
||||
* thread */
|
||||
|
||||
#define GEDIT_DOCUMENT_OUTPUT_STREAM_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object),\
|
||||
GEDIT_TYPE_DOCUMENT_OUTPUT_STREAM,\
|
||||
GeditDocumentOutputStreamPrivate))
|
||||
|
||||
#define MAX_UNICHAR_LEN 6
|
||||
|
||||
struct _GeditDocumentOutputStreamPrivate
|
||||
{
|
||||
GeditDocument *doc;
|
||||
GtkTextIter pos;
|
||||
|
||||
gchar *buffer;
|
||||
gsize buflen;
|
||||
|
||||
guint is_initialized : 1;
|
||||
guint is_closed : 1;
|
||||
};
|
||||
|
||||
enum
|
||||
{
|
||||
PROP_0,
|
||||
PROP_DOCUMENT
|
||||
};
|
||||
|
||||
G_DEFINE_TYPE (GeditDocumentOutputStream, gedit_document_output_stream, G_TYPE_OUTPUT_STREAM)
|
||||
|
||||
static gssize gedit_document_output_stream_write (GOutputStream *stream,
|
||||
const void *buffer,
|
||||
gsize count,
|
||||
GCancellable *cancellable,
|
||||
GError **error);
|
||||
|
||||
static gboolean gedit_document_output_stream_close (GOutputStream *stream,
|
||||
GCancellable *cancellable,
|
||||
GError **error);
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_set_property (GObject *object,
|
||||
guint prop_id,
|
||||
const GValue *value,
|
||||
GParamSpec *pspec)
|
||||
{
|
||||
GeditDocumentOutputStream *stream = GEDIT_DOCUMENT_OUTPUT_STREAM (object);
|
||||
|
||||
switch (prop_id)
|
||||
{
|
||||
case PROP_DOCUMENT:
|
||||
stream->priv->doc = GEDIT_DOCUMENT (g_value_get_object (value));
|
||||
break;
|
||||
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_get_property (GObject *object,
|
||||
guint prop_id,
|
||||
GValue *value,
|
||||
GParamSpec *pspec)
|
||||
{
|
||||
GeditDocumentOutputStream *stream = GEDIT_DOCUMENT_OUTPUT_STREAM (object);
|
||||
|
||||
switch (prop_id)
|
||||
{
|
||||
case PROP_DOCUMENT:
|
||||
g_value_set_object (value, stream->priv->doc);
|
||||
break;
|
||||
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_finalize (GObject *object)
|
||||
{
|
||||
GeditDocumentOutputStream *stream = GEDIT_DOCUMENT_OUTPUT_STREAM (object);
|
||||
|
||||
g_free (stream->priv->buffer);
|
||||
|
||||
G_OBJECT_CLASS (gedit_document_output_stream_parent_class)->finalize (object);
|
||||
}
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_constructed (GObject *object)
|
||||
{
|
||||
GeditDocumentOutputStream *stream = GEDIT_DOCUMENT_OUTPUT_STREAM (object);
|
||||
|
||||
if (!stream->priv->doc)
|
||||
{
|
||||
g_critical ("This should never happen, a problem happened constructing the Document Output Stream!");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Init the undoable action */
|
||||
gtk_source_buffer_begin_not_undoable_action (GTK_SOURCE_BUFFER (stream->priv->doc));
|
||||
/* clear the buffer */
|
||||
gtk_text_buffer_set_text (GTK_TEXT_BUFFER (stream->priv->doc),
|
||||
"", 0);
|
||||
gtk_text_buffer_set_modified (GTK_TEXT_BUFFER (stream->priv->doc),
|
||||
FALSE);
|
||||
|
||||
gtk_source_buffer_end_not_undoable_action (GTK_SOURCE_BUFFER (stream->priv->doc));
|
||||
}
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_class_init (GeditDocumentOutputStreamClass *klass)
|
||||
{
|
||||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||||
GOutputStreamClass *stream_class = G_OUTPUT_STREAM_CLASS (klass);
|
||||
|
||||
object_class->get_property = gedit_document_output_stream_get_property;
|
||||
object_class->set_property = gedit_document_output_stream_set_property;
|
||||
object_class->finalize = gedit_document_output_stream_finalize;
|
||||
object_class->constructed = gedit_document_output_stream_constructed;
|
||||
|
||||
stream_class->write_fn = gedit_document_output_stream_write;
|
||||
stream_class->close_fn = gedit_document_output_stream_close;
|
||||
|
||||
g_object_class_install_property (object_class,
|
||||
PROP_DOCUMENT,
|
||||
g_param_spec_object ("document",
|
||||
"Document",
|
||||
"The document which is written",
|
||||
GEDIT_TYPE_DOCUMENT,
|
||||
G_PARAM_READWRITE |
|
||||
G_PARAM_CONSTRUCT_ONLY));
|
||||
|
||||
g_type_class_add_private (object_class, sizeof (GeditDocumentOutputStreamPrivate));
|
||||
}
|
||||
|
||||
static void
|
||||
gedit_document_output_stream_init (GeditDocumentOutputStream *stream)
|
||||
{
|
||||
stream->priv = GEDIT_DOCUMENT_OUTPUT_STREAM_GET_PRIVATE (stream);
|
||||
|
||||
stream->priv->buffer = NULL;
|
||||
stream->priv->buflen = 0;
|
||||
|
||||
stream->priv->is_initialized = FALSE;
|
||||
stream->priv->is_closed = FALSE;
|
||||
}
|
||||
|
||||
static GeditDocumentNewlineType
|
||||
get_newline_type (GtkTextIter *end)
|
||||
{
|
||||
GeditDocumentNewlineType res;
|
||||
GtkTextIter copy;
|
||||
gunichar c;
|
||||
|
||||
copy = *end;
|
||||
c = gtk_text_iter_get_char (©);
|
||||
|
||||
if (g_unichar_break_type (c) == G_UNICODE_BREAK_CARRIAGE_RETURN)
|
||||
{
|
||||
if (gtk_text_iter_forward_char (©) &&
|
||||
g_unichar_break_type (gtk_text_iter_get_char (©)) == G_UNICODE_BREAK_LINE_FEED)
|
||||
{
|
||||
res = GEDIT_DOCUMENT_NEWLINE_TYPE_CR_LF;
|
||||
}
|
||||
else
|
||||
{
|
||||
res = GEDIT_DOCUMENT_NEWLINE_TYPE_CR;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
res = GEDIT_DOCUMENT_NEWLINE_TYPE_LF;
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
GOutputStream *
|
||||
gedit_document_output_stream_new (GeditDocument *doc)
|
||||
{
|
||||
return G_OUTPUT_STREAM (g_object_new (GEDIT_TYPE_DOCUMENT_OUTPUT_STREAM,
|
||||
"document", doc, NULL));
|
||||
}
|
||||
|
||||
GeditDocumentNewlineType
|
||||
gedit_document_output_stream_detect_newline_type (GeditDocumentOutputStream *stream)
|
||||
{
|
||||
GeditDocumentNewlineType type;
|
||||
GtkTextIter iter;
|
||||
|
||||
g_return_val_if_fail (GEDIT_IS_DOCUMENT_OUTPUT_STREAM (stream),
|
||||
GEDIT_DOCUMENT_NEWLINE_TYPE_DEFAULT);
|
||||
|
||||
type = GEDIT_DOCUMENT_NEWLINE_TYPE_DEFAULT;
|
||||
|
||||
gtk_text_buffer_get_start_iter (GTK_TEXT_BUFFER (stream->priv->doc),
|
||||
&iter);
|
||||
|
||||
if (gtk_text_iter_ends_line (&iter) || gtk_text_iter_forward_to_line_end (&iter))
|
||||
{
|
||||
type = get_newline_type (&iter);
|
||||
}
|
||||
|
||||
return type;
|
||||
}
|
||||
|
||||
/* If the last char is a newline, remove it from the buffer (otherwise
|
||||
GtkTextView shows it as an empty line). See bug #324942. */
|
||||
static void
|
||||
remove_ending_newline (GeditDocumentOutputStream *stream)
|
||||
{
|
||||
GtkTextIter end;
|
||||
GtkTextIter start;
|
||||
|
||||
gtk_text_buffer_get_end_iter (GTK_TEXT_BUFFER (stream->priv->doc), &end);
|
||||
start = end;
|
||||
|
||||
gtk_text_iter_set_line_offset (&start, 0);
|
||||
|
||||
if (gtk_text_iter_ends_line (&start) &&
|
||||
gtk_text_iter_backward_line (&start))
|
||||
{
|
||||
if (!gtk_text_iter_ends_line (&start))
|
||||
{
|
||||
gtk_text_iter_forward_to_line_end (&start);
|
||||
}
|
||||
|
||||
/* Delete the empty line which is from 'start' to 'end' */
|
||||
gtk_text_buffer_delete (GTK_TEXT_BUFFER (stream->priv->doc),
|
||||
&start,
|
||||
&end);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
end_append_text_to_document (GeditDocumentOutputStream *stream)
|
||||
{
|
||||
remove_ending_newline (stream);
|
||||
|
||||
gtk_text_buffer_set_modified (GTK_TEXT_BUFFER (stream->priv->doc),
|
||||
FALSE);
|
||||
|
||||
gtk_source_buffer_end_not_undoable_action (GTK_SOURCE_BUFFER (stream->priv->doc));
|
||||
}
|
||||
|
||||
static gssize
|
||||
gedit_document_output_stream_write (GOutputStream *stream,
|
||||
const void *buffer,
|
||||
gsize count,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
GeditDocumentOutputStream *ostream;
|
||||
gchar *text;
|
||||
gsize len;
|
||||
gboolean freetext = FALSE;
|
||||
const gchar *end;
|
||||
gsize nvalid;
|
||||
gboolean valid;
|
||||
|
||||
if (g_cancellable_set_error_if_cancelled (cancellable, error))
|
||||
return -1;
|
||||
|
||||
ostream = GEDIT_DOCUMENT_OUTPUT_STREAM (stream);
|
||||
|
||||
if (!ostream->priv->is_initialized)
|
||||
{
|
||||
/* Init the undoable action */
|
||||
gtk_source_buffer_begin_not_undoable_action (GTK_SOURCE_BUFFER (ostream->priv->doc));
|
||||
|
||||
gtk_text_buffer_get_start_iter (GTK_TEXT_BUFFER (ostream->priv->doc),
|
||||
&ostream->priv->pos);
|
||||
ostream->priv->is_initialized = TRUE;
|
||||
}
|
||||
|
||||
if (ostream->priv->buflen > 0)
|
||||
{
|
||||
len = ostream->priv->buflen + count;
|
||||
text = g_new (gchar , len + 1);
|
||||
memcpy (text, ostream->priv->buffer, ostream->priv->buflen);
|
||||
memcpy (text + ostream->priv->buflen, buffer, count);
|
||||
text[len] = '\0';
|
||||
g_free (ostream->priv->buffer);
|
||||
ostream->priv->buffer = NULL;
|
||||
ostream->priv->buflen = 0;
|
||||
freetext = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
text = (gchar *) buffer;
|
||||
len = count;
|
||||
}
|
||||
|
||||
/* validate */
|
||||
valid = g_utf8_validate (text, len, &end);
|
||||
nvalid = end - text;
|
||||
|
||||
if (!valid)
|
||||
{
|
||||
gsize remainder;
|
||||
|
||||
remainder = len - nvalid;
|
||||
|
||||
if ((remainder < MAX_UNICHAR_LEN) &&
|
||||
(g_utf8_get_char_validated (text + nvalid, remainder) == (gunichar)-2))
|
||||
{
|
||||
ostream->priv->buffer = g_strndup (end, remainder);
|
||||
ostream->priv->buflen = remainder;
|
||||
len -= remainder;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* TODO: we cuould escape invalid text and tag it in red
|
||||
* and make the doc readonly.
|
||||
*/
|
||||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA,
|
||||
_("Invalid UTF-8 sequence in input"));
|
||||
|
||||
if (freetext)
|
||||
g_free (text);
|
||||
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
gtk_text_buffer_insert (GTK_TEXT_BUFFER (ostream->priv->doc),
|
||||
&ostream->priv->pos, text, len);
|
||||
|
||||
if (freetext)
|
||||
g_free (text);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gedit_document_output_stream_close (GOutputStream *stream,
|
||||
GCancellable *cancellable,
|
||||
GError **error)
|
||||
{
|
||||
GeditDocumentOutputStream *ostream = GEDIT_DOCUMENT_OUTPUT_STREAM (stream);
|
||||
|
||||
if (!ostream->priv->is_closed && ostream->priv->is_initialized)
|
||||
{
|
||||
end_append_text_to_document (ostream);
|
||||
ostream->priv->is_closed = TRUE;
|
||||
}
|
||||
|
||||
if (ostream->priv->buflen > 0)
|
||||
{
|
||||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA,
|
||||
_("Incomplete UTF-8 sequence in input"));
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
Reference in New Issue
Block a user