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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright © 2000-2003 Marco Pesenti Gritti
* Copyright © 2011 Igalia S.L.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/

#include <config.h>

#include <glib.h>

#include <glib/gi18n.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>

#include "ephy-adblock-manager.h"
#include "ephy-debug.h"
#include "ephy-download.h"
#include "ephy-embed-shell.h"
#include "ephy-embed-single.h"
#include "ephy-embed-type-builtins.h"
#include "ephy-encodings.h"
#include "ephy-file-helpers.h"
#include "ephy-history-service.h"
#include "ephy-print-utils.h"

#define PAGE_SETUP_FILENAME "page-setup-gtk.ini"
#define PRINT_SETTINGS_FILENAME "print-settings.ini"

#define LEGACY_PAGE_SETUP_FILENAME "page-setup.ini"

#define EPHY_EMBED_SHELL_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_EMBED_SHELL, EphyEmbedShellPrivate))

#define ENABLE_MIGRATION

struct _EphyEmbedShellPrivate
{
EphyHistoryService *global_history_service;
GList *downloads;
EphyEmbedSingle *embed_single;
EphyEncodings *encodings;
EphyAdBlockManager *adblock_manager;
GtkPageSetup *page_setup;
GtkPrintSettings *print_settings;
EphyEmbedShellMode mode;
EphyWebApplication *application;
guint single_initialised : 1;
};

enum
{
DOWNLOAD_ADDED,
DOWNLOAD_REMOVED,
PREPARE_CLOSE,
LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

enum
{
PROP_0,
PROP_MODE,
N_PROPERTIES
};

static GParamSpec *object_properties[N_PROPERTIES] = { NULL, };

static void ephy_embed_shell_class_init (EphyEmbedShellClass *klass);
static void ephy_embed_shell_init (EphyEmbedShell *shell);

EphyEmbedShell *embed_shell = NULL;

G_DEFINE_TYPE (EphyEmbedShell, ephy_embed_shell, GTK_TYPE_APPLICATION)

static void
ephy_embed_shell_dispose (GObject *object)
{
EphyEmbedShell *shell = EPHY_EMBED_SHELL (object);
EphyEmbedShellPrivate *priv = shell->priv;

if (priv->encodings != NULL)
{
LOG ("Unref encodings");
g_object_unref (priv->encodings);
priv->encodings = NULL;
}

if (priv->page_setup != NULL)
{
g_object_unref (priv->page_setup);
priv->page_setup = NULL;
}

if (priv->print_settings != NULL)
{
g_object_unref (priv->print_settings);
priv->print_settings = NULL;
}

if (priv->application != NULL)
{
g_object_unref (priv->application);
priv->application = NULL;
}

G_OBJECT_CLASS (ephy_embed_shell_parent_class)->dispose (object);
}

static void
ephy_embed_shell_finalize (GObject *object)
{
EphyEmbedShell *shell = EPHY_EMBED_SHELL (object);

if (shell->priv->downloads != NULL)
{
LOG ("Destroying downloads list");
g_list_foreach (shell->priv->downloads, (GFunc) g_object_unref, NULL);
g_list_free (shell->priv->downloads);
shell->priv->downloads = NULL;
}

if (shell->priv->global_history_service)
{
LOG ("Unref history service");
g_object_unref (shell->priv->global_history_service);
}

if (shell->priv->embed_single)
{
LOG ("Unref embed single");
g_object_unref (G_OBJECT (shell->priv->embed_single));
}

if (shell->priv->adblock_manager != NULL)
{
LOG ("Unref adblock manager");
g_object_unref (shell->priv->adblock_manager);
shell->priv->adblock_manager = NULL;
}

G_OBJECT_CLASS (ephy_embed_shell_parent_class)->finalize (object);
}

/**
* ephy_embed_shell_get_global_history_service:
* @shell: the #EphyEmbedShell
*
* Return value: (transfer none): the global #EphyHistoryService
**/
GObject *
ephy_embed_shell_get_global_history_service (EphyEmbedShell *shell)
{
g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);

if (shell->priv->global_history_service == NULL)
{
char *filename;

filename = g_build_filename (ephy_dot_dir (), "ephy-history.db", NULL);
shell->priv->global_history_service = ephy_history_service_new (filename);
g_free (filename);
g_return_val_if_fail (shell->priv->global_history_service, NULL);
}

return G_OBJECT (shell->priv->global_history_service);
}

static GObject *
impl_get_embed_single (EphyEmbedShell *shell)
{
EphyEmbedShellPrivate *priv;

g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);

priv = shell->priv;

if (priv->embed_single != NULL &&
!priv->single_initialised)
{
g_warning ("ephy_embed_shell_get_embed_single called while the single is being initialised!\n");
return G_OBJECT (priv->embed_single);
}

if (priv->embed_single == NULL)
{
priv->embed_single = EPHY_EMBED_SINGLE
                  (g_object_new (EPHY_TYPE_EMBED_SINGLE, NULL));
g_assert (priv->embed_single != NULL);

if (!ephy_embed_single_initialize (priv->embed_single))
{
GtkWidget *dialog;

dialog = gtk_message_dialog_new
(NULL,
GTK_DIALOG_MODAL,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
_("Epiphany can't be used now. "
"Initialization failed."));
gtk_dialog_run (GTK_DIALOG (dialog));

exit (0);
}

priv->single_initialised = TRUE;
}

return G_OBJECT (shell->priv->embed_single);
}

/**
* ephy_embed_shell_get_embed_single:
* @shell: the #EphyEmbedShell
*
* Return value: (transfer none):
**/
GObject *
ephy_embed_shell_get_embed_single (EphyEmbedShell *shell)
{
EphyEmbedShellClass *klass = EPHY_EMBED_SHELL_GET_CLASS (shell);

return klass->get_embed_single (shell);
}

/**
* ephy_embed_shell_get_encodings:
* @shell: the #EphyEmbedShell
*
* Return value: (transfer none):
**/
GObject *
ephy_embed_shell_get_encodings (EphyEmbedShell *shell)
{
g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);

if (shell->priv->encodings == NULL)
{
shell->priv->encodings = ephy_encodings_new ();
}

return G_OBJECT (shell->priv->encodings);
}

void
ephy_embed_shell_prepare_close (EphyEmbedShell *shell)
{
g_signal_emit (shell, signals[PREPARE_CLOSE], 0);
}

static void
ephy_embed_shell_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
  EphyEmbedShell *embed_shell = EPHY_EMBED_SHELL (object);

  switch (prop_id)
  {
  case PROP_MODE:
embed_shell->priv->mode = g_value_get_enum (value);
break;
  default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  }
}

static void
ephy_embed_shell_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
  EphyEmbedShell *embed_shell = EPHY_EMBED_SHELL (object);

  switch (prop_id)
  {
  case PROP_MODE:
g_value_set_enum (value, embed_shell->priv->mode);
break;
  default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  }
}

static void
ephy_embed_shell_init (EphyEmbedShell *shell)
{
shell->priv = EPHY_EMBED_SHELL_GET_PRIVATE (shell);

/* globally accessible singleton */
g_assert (embed_shell == NULL);
embed_shell = shell;

shell->priv->downloads = NULL;
}

static void
ephy_embed_shell_class_init (EphyEmbedShellClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);

object_class->dispose = ephy_embed_shell_dispose;
object_class->finalize = ephy_embed_shell_finalize;
object_class->set_property = ephy_embed_shell_set_property;
object_class->get_property = ephy_embed_shell_get_property;

klass->get_embed_single = impl_get_embed_single;

object_properties[PROP_MODE] =
g_param_spec_enum ("mode",
"Mode",
"The global mode for this instance of Epiphany .",
EPHY_TYPE_EMBED_SHELL_MODE,
EPHY_EMBED_SHELL_MODE_BROWSER,
G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB | G_PARAM_CONSTRUCT_ONLY);

g_object_class_install_properties (object_class,
N_PROPERTIES,
object_properties);

/**
* EphyEmbed::download-added:
* @shell: the #EphyEmbedShell
* @download: the #EphyDownload added
*
* Emitted when a #EphyDownload has been added to the global watch list of
* @shell, via ephy_embed_shell_add_download.
**/
signals[DOWNLOAD_ADDED] =
g_signal_new ("download-added",
EPHY_TYPE_EMBED_SHELL,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EphyEmbedShellClass, download_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, EPHY_TYPE_DOWNLOAD);

/**
* EphyEmbed::download-removed:
* @shell: the #EphyEmbedShell
* @download: the #EphyDownload being removed
*
* Emitted when a #EphyDownload has been removed from the global watch list of
* @shell, via ephy_embed_shell_remove_download.
**/
signals[DOWNLOAD_REMOVED] =
g_signal_new ("download-removed",
EPHY_TYPE_EMBED_SHELL,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EphyEmbedShellClass, download_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, EPHY_TYPE_DOWNLOAD);

/**
* EphyEmbed::prepare-close:
* @shell: the #EphyEmbedShell
*
* The ::prepare-close signal is emitted when epiphany is preparing to
* quit on command from the session manager. You can use it when you need
* to do something special (shut down a service, for example).
**/
signals[PREPARE_CLOSE] =
g_signal_new ("prepare-close",
EPHY_TYPE_EMBED_SHELL,
G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EphyEmbedShellClass, prepare_close),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);

g_type_class_add_private (object_class, sizeof (EphyEmbedShellPrivate));
}

/**
* ephy_embed_shell_get_default:
*
* Retrieves the default #EphyEmbedShell object
*
* Return value: (transfer none): the default #EphyEmbedShell
**/
EphyEmbedShell *
ephy_embed_shell_get_default (void)
{
return embed_shell;
}

/**
* ephy_embed_shell_get_adblock_manager:
* @shell: the #EphyEmbedShell
*
* Returns the adblock manager.
*
* Return value: (transfer none): the adblock manager
**/
GObject *
ephy_embed_shell_get_adblock_manager (EphyEmbedShell *shell)
{
g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);

if (shell->priv->adblock_manager == NULL)
{
shell->priv->adblock_manager = g_object_new (EPHY_TYPE_ADBLOCK_MANAGER, NULL);
}

return G_OBJECT (shell->priv->adblock_manager);
}

void
ephy_embed_shell_set_page_setup (EphyEmbedShell *shell,
GtkPageSetup *page_setup)
{
EphyEmbedShellPrivate *priv;
char *path;

g_return_if_fail (EPHY_IS_EMBED_SHELL (shell));
priv = shell->priv;

if (page_setup != NULL)
{
g_object_ref (page_setup);
}
else
{
page_setup = gtk_page_setup_new ();
}

if (priv->page_setup != NULL)
{
g_object_unref (priv->page_setup);
}

priv->page_setup = page_setup;

path = g_build_filename (ephy_dot_dir (), PAGE_SETUP_FILENAME, NULL);
gtk_page_setup_to_file (page_setup, path, NULL);
g_free (path);
}

/**
* ephy_embed_shell_get_page_setup:
*
* Return value: (transfer none):
**/
GtkPageSetup *
ephy_embed_shell_get_page_setup (EphyEmbedShell *shell)
{
EphyEmbedShellPrivate *priv;

g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);
priv = shell->priv;

if (priv->page_setup == NULL)
{
GError *error = NULL;
char *path;

path = g_build_filename (ephy_dot_dir (), PAGE_SETUP_FILENAME, NULL);
priv->page_setup = gtk_page_setup_new_from_file (path, &error);
g_free (path);

#ifdef ENABLE_MIGRATION
/* If the file doesn't exist, try to fall back to the old format */
if (error != NULL &&
error->domain == G_FILE_ERROR &&
error->code == G_FILE_ERROR_NOENT)
{
path = g_build_filename (ephy_dot_dir (), LEGACY_PAGE_SETUP_FILENAME, NULL);
priv->page_setup = ephy_print_utils_page_setup_new_from_file (path, NULL);
if (priv->page_setup != NULL)
{
/* Delete the old file, so we don't migrate again */
g_unlink (path);
}
g_free (path);
} else if (error != NULL)
g_warning ("error: %s\n", error->message);
#endif /* ENABLE_MIGRATION */

if (error)
{
g_error_free (error);
}

/* If that still didn't work, create a new, empty one */
if (priv->page_setup == NULL)
{
priv->page_setup = gtk_page_setup_new ();
}
}

return priv->page_setup;
}

/**
* ephy_embed_shell_set_print_gettings:
* @shell: the #EphyEmbedShell
* @settings: the new #GtkPrintSettings object
*
* Sets the global #GtkPrintSettings object.
*
**/
void
ephy_embed_shell_set_print_settings (EphyEmbedShell *shell,
GtkPrintSettings *settings)
{
EphyEmbedShellPrivate *priv;
char *path;

g_return_if_fail (EPHY_IS_EMBED_SHELL (shell));
priv = shell->priv;

if (settings != NULL)
{
g_object_ref (settings);
}

if (priv->print_settings != NULL)
{
g_object_unref (priv->print_settings);
}

priv->print_settings = settings ? settings : gtk_print_settings_new ();

path = g_build_filename (ephy_dot_dir (), PRINT_SETTINGS_FILENAME, NULL);
gtk_print_settings_to_file (settings, path, NULL);
g_free (path);
}

/**
* ephy_embed_shell_get_print_settings:
* @shell: the #EphyEmbedShell
*
* Gets the global #GtkPrintSettings object.
*
* Returns: (transfer none): a #GtkPrintSettings object
**/
GtkPrintSettings *
ephy_embed_shell_get_print_settings (EphyEmbedShell *shell)
{
EphyEmbedShellPrivate *priv;

g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);
priv = shell->priv;

if (priv->print_settings == NULL)
{
GError *error = NULL;
char *path;

path = g_build_filename (ephy_dot_dir (), PRINT_SETTINGS_FILENAME, NULL);
priv->print_settings = gtk_print_settings_new_from_file (path, &error);
g_free (path);

/* Note: the gtk print settings file format is the same as our
* legacy one, so no need to migrate here.
*/

if (priv->print_settings == NULL)
{
priv->print_settings = gtk_print_settings_new ();
}
}

return priv->print_settings;
}

/**
* ephy_embed_shell_get_downloads:
* @shell: the #EphyEmbedShell
*
* Gets the global #GList object listing active downloads.
*
* Returns: (transfer none) (element-type EphyDownload): a #GList object
**/
GList *
ephy_embed_shell_get_downloads (EphyEmbedShell *shell)
{
EphyEmbedShellPrivate *priv;

g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);
priv = shell->priv;

return priv->downloads;
}

void
ephy_embed_shell_add_download (EphyEmbedShell *shell, EphyDownload *download)
{
EphyEmbedShellPrivate *priv;

g_return_if_fail (EPHY_IS_EMBED_SHELL (shell));

priv = shell->priv;
priv->downloads = g_list_prepend (priv->downloads, download);

g_signal_emit_by_name (shell, "download-added", download, NULL);
}

void
ephy_embed_shell_remove_download (EphyEmbedShell *shell, EphyDownload *download)
{
EphyEmbedShellPrivate *priv;

g_return_if_fail (EPHY_IS_EMBED_SHELL (shell));

priv = shell->priv;
priv->downloads = g_list_remove (priv->downloads, download);

g_signal_emit_by_name (shell, "download-removed", download, NULL);
}

/**
* ephy_embed_shell_get_mode:
* @shell: an #EphyEmbedShell
*
* Returns: the global mode of the @shell
**/
EphyEmbedShellMode
ephy_embed_shell_get_mode (EphyEmbedShell *shell)
{
g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), EPHY_EMBED_SHELL_MODE_BROWSER);

return shell->priv->mode;
}

void
ephy_embed_shell_set_application (EphyEmbedShell *shell,
EphyWebApplication *app)
{
g_return_if_fail (EPHY_IS_EMBED_SHELL (shell));

if (shell->priv->application)
g_object_unref (shell->priv->application);

shell->priv->application = app;
g_object_ref (app);
}

/**
* ephy_embed_shell_get_application:
* @shell: the EphyEmbedShell
*
* Returns the web application, if in application mode.
*
* Return value: (transfer none): an #EphyWebApplication
**/
EphyWebApplication *
ephy_embed_shell_get_application (EphyEmbedShell *shell)
{
g_return_val_if_fail (EPHY_IS_EMBED_SHELL (shell), NULL);

return shell->priv->application;
}
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