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xed/xed/xed-history-entry.c

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/*
* xed-history-entry.c
* This file is part of xed
*
* Copyright (C) 2006 - Paolo Borelli
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Modified by the xed Team, 2006. See the AUTHORS file for a
* list of people on the xed Team.
* See the ChangeLog files for a list of changes.
*
* $Id$
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <gio/gio.h>
#include "xed-history-entry.h"
enum
{
PROP_0,
PROP_HISTORY_ID,
PROP_HISTORY_LENGTH
};
#define MIN_ITEM_LEN 3
#define XED_HISTORY_ENTRY_HISTORY_LENGTH_DEFAULT 10
#define XED_HISTORY_ENTRY_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), \
XED_TYPE_HISTORY_ENTRY, \
XedHistoryEntryPrivate))
struct _XedHistoryEntryPrivate
{
gchar *history_id;
guint history_length;
GtkEntryCompletion *completion;
GSettings *settings;
};
G_DEFINE_TYPE(XedHistoryEntry, xed_history_entry, GTK_TYPE_COMBO_BOX_TEXT)
static void
xed_history_entry_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *spec)
{
XedHistoryEntry *entry;
g_return_if_fail (XED_IS_HISTORY_ENTRY (object));
entry = XED_HISTORY_ENTRY (object);
switch (prop_id)
{
case PROP_HISTORY_ID:
entry->priv->history_id = g_value_dup_string (value);
break;
case PROP_HISTORY_LENGTH:
xed_history_entry_set_history_length (entry, g_value_get_uint (value));
break;
default:
break;
}
}
static void
xed_history_entry_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *spec)
{
XedHistoryEntryPrivate *priv;
g_return_if_fail (XED_IS_HISTORY_ENTRY (object));
priv = XED_HISTORY_ENTRY (object)->priv;
switch (prop_id)
{
case PROP_HISTORY_ID:
g_value_set_string (value, priv->history_id);
break;
case PROP_HISTORY_LENGTH:
g_value_set_uint (value, priv->history_length);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, spec);
}
}
static void
xed_history_entry_dispose (GObject *object)
{
XedHistoryEntryPrivate *priv;
priv = XED_HISTORY_ENTRY (object)->priv;
xed_history_entry_set_enable_completion (XED_HISTORY_ENTRY (object), FALSE);
g_clear_object (&priv->settings);
G_OBJECT_CLASS (xed_history_entry_parent_class)->dispose (object);
}
static void
xed_history_entry_finalize (GObject *object)
{
XedHistoryEntryPrivate *priv;
priv = XED_HISTORY_ENTRY (object)->priv;
g_free (priv->history_id);
G_OBJECT_CLASS (xed_history_entry_parent_class)->finalize (object);
}
static void
xed_history_entry_class_init (XedHistoryEntryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = xed_history_entry_set_property;
object_class->get_property = xed_history_entry_get_property;
object_class->finalize = xed_history_entry_finalize;
object_class->dispose = xed_history_entry_dispose;
g_object_class_install_property (object_class,
PROP_HISTORY_ID,
g_param_spec_string ("history-id",
"History ID",
"History ID",
NULL,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class,
PROP_HISTORY_LENGTH,
g_param_spec_uint ("history-length",
"Max History Length",
"Max History Length",
0,
G_MAXUINT,
XED_HISTORY_ENTRY_HISTORY_LENGTH_DEFAULT,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/* TODO: Add enable-completion property */
g_type_class_add_private (object_class, sizeof(XedHistoryEntryPrivate));
}
static GtkListStore *
get_history_store (XedHistoryEntry *entry)
{
GtkTreeModel *store;
store = gtk_combo_box_get_model (GTK_COMBO_BOX (entry));
g_return_val_if_fail (GTK_IS_LIST_STORE (store), NULL);
return (GtkListStore *) store;
}
static gchar **
get_history_items (XedHistoryEntry *entry)
{
GtkListStore *store;
GtkTreeIter iter;
GPtrArray *array;
gboolean valid;
gint n_children;
gint text_column;
store = get_history_store (entry);
text_column = gtk_combo_box_get_entry_text_column (GTK_COMBO_BOX (entry));
valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter);
n_children = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (store), NULL);
array = g_ptr_array_sized_new (n_children + 1);
while (valid)
{
gchar *str;
gtk_tree_model_get (GTK_TREE_MODEL (store), &iter, text_column, &str, -1);
g_ptr_array_add (array, str);
valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (store), &iter);
}
g_ptr_array_add (array, NULL);
return (gchar **)g_ptr_array_free (array, FALSE);
}
static void
xed_history_entry_save_history (XedHistoryEntry *entry)
{
gchar **items;
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
items = get_history_items (entry);
g_settings_set_strv (entry->priv->settings, entry->priv->history_id, (const gchar * const *)items);
g_strfreev (items);
}
static gboolean
remove_item (XedHistoryEntry *entry,
const gchar *text)
{
GtkListStore *store;
GtkTreeIter iter;
gint text_column;
g_return_val_if_fail (text != NULL, FALSE);
store = get_history_store (entry);
text_column = gtk_combo_box_get_entry_text_column (GTK_COMBO_BOX (entry));
if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter))
{
return FALSE;
}
do
{
gchar *item_text;
gtk_tree_model_get (GTK_TREE_MODEL (store), &iter, text_column, &item_text, -1);
if (item_text != NULL && strcmp (item_text, text) == 0)
{
gtk_list_store_remove (store, &iter);
g_free (item_text);
return TRUE;
}
g_free (item_text);
} while (gtk_tree_model_iter_next (GTK_TREE_MODEL (store), &iter));
return FALSE;
}
static void
clamp_list_store (GtkListStore *store,
guint max)
{
GtkTreePath *path;
GtkTreeIter iter;
/* -1 because TreePath counts from 0 */
path = gtk_tree_path_new_from_indices (max - 1, -1);
if (gtk_tree_model_get_iter (GTK_TREE_MODEL (store), &iter, path))
{
while (1)
{
if (!gtk_list_store_remove (store, &iter))
{
break;
}
}
}
gtk_tree_path_free (path);
}
static void
insert_history_item (XedHistoryEntry *entry,
const gchar *text,
gboolean prepend)
{
GtkListStore *store;
if (g_utf8_strlen (text, -1) <= MIN_ITEM_LEN)
{
return;
}
store = get_history_store (entry);
/* remove the text from the store if it was already
* present. If it wasn't, clamp to max history - 1
* before inserting the new row, otherwise appending
* would not work */
if (!remove_item (entry, text))
{
clamp_list_store (store, entry->priv->history_length - 1);
}
if (prepend)
{
gtk_combo_box_text_prepend_text (GTK_COMBO_BOX_TEXT (entry), text);
}
else
{
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (entry), text);
}
xed_history_entry_save_history (entry);
}
void
xed_history_entry_prepend_text (XedHistoryEntry *entry,
const gchar *text)
{
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
g_return_if_fail (text != NULL);
insert_history_item (entry, text, TRUE);
}
void
xed_history_entry_append_text (XedHistoryEntry *entry,
const gchar *text)
{
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
g_return_if_fail (text != NULL);
insert_history_item (entry, text, FALSE);
}
static void
xed_history_entry_load_history (XedHistoryEntry *entry)
{
gchar **items;
gsize i;
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
items = g_settings_get_strv (entry->priv->settings, entry->priv->history_id);
i = 0;
gtk_combo_box_text_remove_all (GTK_COMBO_BOX_TEXT (entry));
/* Now the default value is an empty string so we have to take care of it to not
add the empty string in the search list */
while (items[i] != NULL && *items[i] != '\0' && i < entry->priv->history_length)
{
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (entry), items[i]);
i++;
}
g_strfreev (items);
}
void
xed_history_entry_clear (XedHistoryEntry *entry)
{
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
gtk_combo_box_text_remove_all (GTK_COMBO_BOX_TEXT (entry));
xed_history_entry_save_history (entry);
}
static void
xed_history_entry_init (XedHistoryEntry *entry)
{
XedHistoryEntryPrivate *priv;
priv = XED_HISTORY_ENTRY_GET_PRIVATE (entry);
entry->priv = priv;
priv->history_id = NULL;
priv->history_length = XED_HISTORY_ENTRY_HISTORY_LENGTH_DEFAULT;
priv->completion = NULL;
priv->settings = g_settings_new ("org.x.editor.state.history-entry");
}
void
xed_history_entry_set_history_length (XedHistoryEntry *entry,
guint history_length)
{
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
g_return_if_fail (history_length > 0);
entry->priv->history_length = history_length;
/* TODO: update if we currently have more items than max */
}
guint
xed_history_entry_get_history_length (XedHistoryEntry *entry)
{
g_return_val_if_fail (XED_IS_HISTORY_ENTRY (entry), 0);
return entry->priv->history_length;
}
void
xed_history_entry_set_enable_completion (XedHistoryEntry *entry,
gboolean enable)
{
g_return_if_fail (XED_IS_HISTORY_ENTRY (entry));
if (enable)
{
if (entry->priv->completion != NULL)
{
return;
}
entry->priv->completion = gtk_entry_completion_new ();
gtk_entry_completion_set_model (entry->priv->completion, GTK_TREE_MODEL (get_history_store (entry)));
/* Use model column 0 as the text column */
gtk_entry_completion_set_text_column (entry->priv->completion, 0);
gtk_entry_completion_set_minimum_key_length (entry->priv->completion, MIN_ITEM_LEN);
gtk_entry_completion_set_popup_completion (entry->priv->completion, FALSE);
gtk_entry_completion_set_inline_completion (entry->priv->completion, TRUE);
/* Assign the completion to the entry */
gtk_entry_set_completion (GTK_ENTRY (xed_history_entry_get_entry(entry)), entry->priv->completion);
}
else
{
if (entry->priv->completion == NULL)
{
return;
}
gtk_entry_set_completion (GTK_ENTRY (xed_history_entry_get_entry (entry)), NULL);
g_object_unref (entry->priv->completion);
entry->priv->completion = NULL;
}
}
gboolean
xed_history_entry_get_enable_completion (XedHistoryEntry *entry)
{
g_return_val_if_fail (XED_IS_HISTORY_ENTRY (entry), FALSE);
return entry->priv->completion != NULL;
}
GtkWidget *
xed_history_entry_new (const gchar *history_id,
gboolean enable_completion)
{
GtkWidget *ret;
g_return_val_if_fail (history_id != NULL, NULL);
ret = g_object_new (XED_TYPE_HISTORY_ENTRY,
"has-entry", TRUE,
"entry-text-column", 0,
"id-column", 1,
"history-id", history_id,
NULL);
/* loading has to happen after the model
* has been set. However the model is not a
* G_PARAM_CONSTRUCT property of GtkComboBox
* so we cannot do this in the constructor.
* For now we simply do here since this widget is
* not bound to other programming languages.
* A maybe better alternative is to override the
* model property of combobox and mark CONTRUCT_ONLY.
* This would also ensure that the model cannot be
* set explicitely at a later time.
*/
xed_history_entry_load_history (XED_HISTORY_ENTRY (ret));
xed_history_entry_set_enable_completion (XED_HISTORY_ENTRY (ret), enable_completion);
return ret;
}
/*
* Utility function to get the editable text entry internal widget.
* I would prefer to not expose this implementation detail and
* simply make the XedHistoryEntry widget implement the
* GtkEditable interface. Unfortunately both GtkEditable and
* GtkComboBox have a "changed" signal and I am not sure how to
* handle the conflict.
*/
GtkWidget *
xed_history_entry_get_entry (XedHistoryEntry *entry)
{
g_return_val_if_fail (XED_IS_HISTORY_ENTRY (entry), NULL);
return gtk_bin_get_child (GTK_BIN (entry));
}
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