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xed/plugins/trailsave/xed-trail-save-plugin.c

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/*
* xed-trail-save-plugin.c
*
* 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, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <string.h>
#include <xed/xed-window.h>
#include <xed/xed-window-activatable.h>
#include <xed/xed-debug.h>
#include "xed-trail-save-plugin.h"
#define XED_TRAIL_SAVE_PLUGIN_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), \
XED_TYPE_TRAIL_SAVE_PLUGIN, \
XedTrailSavePluginPrivate))
static void xed_window_activatable_iface_init (XedWindowActivatableInterface *iface);
G_DEFINE_DYNAMIC_TYPE_EXTENDED (XedTrailSavePlugin,
xed_trail_save_plugin,
PEAS_TYPE_EXTENSION_BASE,
0,
G_IMPLEMENT_INTERFACE_DYNAMIC (XED_TYPE_WINDOW_ACTIVATABLE,
xed_window_activatable_iface_init))
struct _XedTrailSavePluginPrivate
{
XedWindow *window;
};
enum
{
PROP_0,
PROP_WINDOW
};
static void
strip_trailing_spaces (GtkTextBuffer *text_buffer)
{
gint line_count, line_num;
GtkTextIter line_start, line_end;
gchar *slice;
gchar byte;
gint byte_index;
gint strip_start_index, strip_end_index;
gint empty_lines_start = -1;
gboolean should_strip;
GtkTextIter strip_start, strip_end;
g_assert (text_buffer != NULL);
line_count = gtk_text_buffer_get_line_count (text_buffer);
for (line_num = 0; line_num < line_count; ++line_num)
{
/* Get line text */
gtk_text_buffer_get_iter_at_line (text_buffer, &line_start, line_num);
if (line_num == line_count - 1)
{
gtk_text_buffer_get_end_iter (text_buffer, &line_end);
}
else
{
gtk_text_buffer_get_iter_at_line (text_buffer, &line_end, line_num + 1);
}
slice = gtk_text_buffer_get_slice (text_buffer, &line_start, &line_end, TRUE);
if (slice == NULL)
{
continue;
}
/* Find indices of bytes that should be stripped */
should_strip = FALSE;
empty_lines_start = (empty_lines_start < 0) ? line_num : empty_lines_start;
for (byte_index = 0; slice [byte_index] != 0; ++byte_index)
{
byte = slice [byte_index];
if ((byte == ' ') || (byte == '\t'))
{
if (!should_strip)
{
strip_start_index = byte_index;
should_strip = TRUE;
}
strip_end_index = byte_index + 1;
}
else if ((byte == '\r') || (byte == '\n'))
{
break;
}
else
{
should_strip = FALSE;
empty_lines_start = -1;
}
}
g_free (slice);
/* Strip trailing spaces */
if (should_strip)
{
gtk_text_buffer_get_iter_at_line_index (text_buffer, &strip_start, line_num, strip_start_index);
gtk_text_buffer_get_iter_at_line_index (text_buffer, &strip_end, line_num, strip_end_index);
gtk_text_buffer_delete (text_buffer, &strip_start, &strip_end);
}
}
/* Strip trailing lines (except for one) */
if (empty_lines_start != -1 && empty_lines_start != (line_count - 1))
{
gtk_text_buffer_get_iter_at_line (text_buffer, &strip_start, empty_lines_start);
gtk_text_buffer_get_end_iter (text_buffer, &strip_end);
gtk_text_buffer_delete (text_buffer, &strip_start, &strip_end);
}
}
static void
on_save (XedDocument *document,
XedTrailSavePlugin *plugin)
{
GtkTextBuffer *text_buffer = GTK_TEXT_BUFFER (document);
strip_trailing_spaces (text_buffer);
}
static void
on_tab_added (XedWindow *window,
XedTab *tab,
XedTrailSavePlugin *plugin)
{
XedDocument *document;
document = xed_tab_get_document (tab);
g_signal_connect (document, "save",
G_CALLBACK (on_save), plugin);
}
static void
on_tab_removed (XedWindow *window,
XedTab *tab,
XedTrailSavePlugin *plugin)
{
XedDocument *document;
document = xed_tab_get_document (tab);
g_signal_handlers_disconnect_by_data (document, plugin);
}
static void
xed_trail_save_plugin_activate (XedWindowActivatable *activatable)
{
XedTrailSavePluginPrivate *priv;
GList *documents;
GList *documents_iter;
XedDocument *document;
xed_debug (DEBUG_PLUGINS);
priv = XED_TRAIL_SAVE_PLUGIN (activatable)->priv;
g_signal_connect (priv->window, "tab_added",
G_CALLBACK (on_tab_added), XED_TRAIL_SAVE_PLUGIN (activatable));
g_signal_connect (priv->window, "tab_removed",
G_CALLBACK (on_tab_removed), XED_TRAIL_SAVE_PLUGIN (activatable));
documents = xed_window_get_documents (priv->window);
for (documents_iter = documents;
documents_iter && documents_iter->data;
documents_iter = documents_iter->next)
{
document = (XedDocument *) documents_iter->data;
g_signal_connect (document, "save",
G_CALLBACK (on_save), XED_TRAIL_SAVE_PLUGIN (activatable));
}
g_list_free (documents);
}
static void
xed_trail_save_plugin_deactivate (XedWindowActivatable *activatable)
{
XedTrailSavePluginPrivate *priv;
GList *documents;
GList *documents_iter;
XedDocument *document;
xed_debug (DEBUG_PLUGINS);
priv = XED_TRAIL_SAVE_PLUGIN (activatable)->priv;
g_signal_handlers_disconnect_by_data (priv->window, XED_TRAIL_SAVE_PLUGIN (activatable));
documents = xed_window_get_documents (priv->window);
for (documents_iter = documents;
documents_iter && documents_iter->data;
documents_iter = documents_iter->next)
{
document = (XedDocument *) documents_iter->data;
g_signal_handlers_disconnect_by_data (document, XED_TRAIL_SAVE_PLUGIN (activatable));
}
g_list_free (documents);
}
static void
xed_trail_save_plugin_init (XedTrailSavePlugin *plugin)
{
xed_debug_message (DEBUG_PLUGINS, "XedTrailSavePlugin initializing");
plugin->priv = G_TYPE_INSTANCE_GET_PRIVATE (plugin, XED_TYPE_TRAIL_SAVE_PLUGIN, XedTrailSavePluginPrivate);
}
static void
xed_trail_save_plugin_dispose (GObject *object)
{
XedTrailSavePlugin *plugin = XED_TRAIL_SAVE_PLUGIN (object);
xed_debug_message (DEBUG_PLUGINS, "XedTrailSavePlugin disposing");
g_clear_object (&plugin->priv->window);
G_OBJECT_CLASS (xed_trail_save_plugin_parent_class)->dispose (object);
}
static void
xed_trail_save_plugin_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
XedTrailSavePlugin *plugin = XED_TRAIL_SAVE_PLUGIN (object);
switch (prop_id)
{
case PROP_WINDOW:
plugin->priv->window = XED_WINDOW (g_value_dup_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
xed_trail_save_plugin_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
XedTrailSavePlugin *plugin = XED_TRAIL_SAVE_PLUGIN (object);
switch (prop_id)
{
case PROP_WINDOW:
g_value_set_object (value, plugin->priv->window);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
xed_trail_save_plugin_class_init (XedTrailSavePluginClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = xed_trail_save_plugin_dispose;
object_class->set_property = xed_trail_save_plugin_set_property;
object_class->get_property = xed_trail_save_plugin_get_property;
g_object_class_override_property (object_class, PROP_WINDOW, "window");
g_type_class_add_private (object_class, sizeof (XedTrailSavePluginPrivate));
}
static void
xed_trail_save_plugin_class_finalize (XedTrailSavePluginClass *klass)
{
/* dummy function - used by G_DEFINE_DYNAMIC_TYPE_EXTENDED */
}
static void
xed_window_activatable_iface_init (XedWindowActivatableInterface *iface)
{
iface->activate = xed_trail_save_plugin_activate;
iface->deactivate = xed_trail_save_plugin_deactivate;
}
G_MODULE_EXPORT void
peas_register_types (PeasObjectModule *module)
{
xed_trail_save_plugin_register_type (G_TYPE_MODULE (module));
peas_object_module_register_extension_type (module,
XED_TYPE_WINDOW_ACTIVATABLE,
XED_TYPE_TRAIL_SAVE_PLUGIN);
}
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