/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* dfos-xfer-progress-dialog.c - Progress dialog for transfer operations in the
   GNOME Desktop File Operation Service.

   Copyright (C) 1999, 2000 Free Software Foundation
   Copyright (C) 2000, 2001 Eazel Inc.

   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; see the file COPYING.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Authors: 
   	Ettore Perazzoli <ettore@gnu.org> 
   	Pavel Cisler <pavel@eazel.com> 
*/

#include <config.h>
#include "nautilus-file-operations-progress.h"

#include <eel/eel-ellipsizing-label.h>
#include <eel/eel-gdk-font-extensions.h>
#include <eel/eel-glib-extensions.h>
#include <eel/eel-gtk-extensions.h>
#include <eel/eel-gtk-macros.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkmain.h>
#include <gtk/gtkprogressbar.h>
#include <gtk/gtktable.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-stock.h>
#include <libgnomevfs/gnome-vfs-utils.h>

/* The width of the progress bar determines the minimum width of the
 * window. It will be wider only if the font is really huge and the
 * fixed labels don't fit in the window otherwise.
 */
#define PROGRESS_BAR_WIDTH 350

#define OUTER_BORDER       5
#define HORIZONTAL_SPACING 3

#define MINIMUM_TIME_UP    1000

static void nautilus_file_operations_progress_initialize_class (NautilusFileOperationsProgressClass *klass);
static void nautilus_file_operations_progress_initialize       (NautilusFileOperationsProgress      *dialog);

EEL_DEFINE_CLASS_BOILERPLATE (NautilusFileOperationsProgress,
				   nautilus_file_operations_progress,
				   GNOME_TYPE_DIALOG);

struct NautilusFileOperationsProgressDetails {
	GtkWidget *progress_title_label;
	GtkWidget *progress_count_label;
	GtkWidget *operation_name_label;
	GtkWidget *item_name;
	GtkWidget *from_label;
	GtkWidget *from_path_label;
	GtkWidget *to_label;
	GtkWidget *to_path_label;

	GtkWidget *progress_bar;

	const char *from_prefix;
	const char *to_prefix;

	gulong bytes_copied;
	gulong files_total;
	gulong bytes_total;

	/* system time (microseconds) when dialog was mapped */
	gint64 start_time;

	guint delayed_close_timeout_id;
};

/* Private functions. */

static void
nautilus_file_operations_progress_update (NautilusFileOperationsProgress *progress)
{
	if (progress->details->bytes_total == 0) {
		/* We haven't set up the file count yet, do not update
		 * the progress bar until we do.
		 */
		return;
	}

	gtk_progress_configure (GTK_PROGRESS (progress->details->progress_bar),
				progress->details->bytes_copied,
				0.0, progress->details->bytes_total);
}

static void
set_text_unescaped_trimmed (EelEllipsizingLabel *label, const char *text)
{
	char *unescaped_text;
	
	if (text == NULL || text[0] == '\0') {
		eel_ellipsizing_label_set_text (label, "");
		return;
	}
	
	unescaped_text = gnome_vfs_unescape_string_for_display (text);
	eel_ellipsizing_label_set_text (label, unescaped_text);
	g_free (unescaped_text);
}

/* This is just to make sure the dialog is not closed without explicit
 * intervention.
 */
static gboolean
close_callback (GnomeDialog *dialog)
{
	return FALSE;
}

/* GtkObject methods.  */

static void
nautilus_file_operations_progress_destroy (GtkObject *object)
{
	NautilusFileOperationsProgress *progress;

	progress = NAUTILUS_FILE_OPERATIONS_PROGRESS (object);

	if (progress->details->delayed_close_timeout_id != 0) {
		g_source_remove (progress->details->delayed_close_timeout_id);
	}

	g_free (progress->details);

	EEL_CALL_PARENT (GTK_OBJECT_CLASS, destroy, (object));
}

/* Initialization.  */

static void
create_titled_label (GtkTable *table, int row, GtkWidget **title_widget, GtkWidget **label_text_widget)
{
	*title_widget = gtk_label_new ("");
	eel_gtk_label_make_bold (GTK_LABEL (*title_widget));
	gtk_misc_set_alignment (GTK_MISC (*title_widget), 1, 0);
	gtk_table_attach (table, *title_widget,
			  0, 1,
			  row, row + 1,
			  GTK_FILL, 0,
			  0, 0);
	gtk_widget_show (*title_widget);

	*label_text_widget = eel_ellipsizing_label_new ("");
	gtk_table_attach (table, *label_text_widget,
			  1, 2,
			  row, row + 1,
			  GTK_FILL | GTK_EXPAND, 0,
			  0, 0);
	gtk_widget_show (*label_text_widget);
	gtk_misc_set_alignment (GTK_MISC (*label_text_widget), 0, 0);
}

static void
map_callback (GtkWidget *widget)
{
	NautilusFileOperationsProgress *progress;

	progress = NAUTILUS_FILE_OPERATIONS_PROGRESS (widget);

	EEL_CALL_PARENT (GTK_WIDGET_CLASS, map, (widget));

	progress->details->start_time = eel_get_system_time ();
}

static gboolean
delete_event_callback (GtkWidget *widget,
		       GdkEventAny *event)
{
	/* Do nothing -- we shouldn't be getting a close event because
	 * the dialog should not have a close box.
	 */
	return TRUE;
}

static void
nautilus_file_operations_progress_initialize (NautilusFileOperationsProgress *progress)
{
	GtkBox *vbox;
	GtkWidget *hbox;
	GtkTable *titled_label_table;

	progress->details = g_new0 (NautilusFileOperationsProgressDetails, 1);

	vbox = GTK_BOX (GNOME_DIALOG (progress)->vbox);

	/* This is evil but makes the dialog look less cramped. */
	gtk_container_set_border_width (GTK_CONTAINER (vbox), OUTER_BORDER);

	hbox = gtk_hbox_new (FALSE, 0);
	gtk_box_pack_start (vbox, hbox, TRUE, TRUE, HORIZONTAL_SPACING);
	gtk_widget_show (hbox);

	/* label- */
	/* Files remaining to be copied: */
	progress->details->progress_title_label = gtk_label_new ("");
	gtk_label_set_justify (GTK_LABEL (progress->details->progress_title_label), GTK_JUSTIFY_LEFT);
	gtk_box_pack_start (GTK_BOX (hbox), progress->details->progress_title_label, FALSE, FALSE, 0);
	gtk_widget_show (progress->details->progress_title_label);
	eel_gtk_label_make_bold (GTK_LABEL (progress->details->progress_title_label));


	/* label -- */
	/* 24 of 30 */
	progress->details->progress_count_label = gtk_label_new ("");
	gtk_label_set_justify (GTK_LABEL (progress->details->progress_count_label), GTK_JUSTIFY_RIGHT);
	gtk_box_pack_end (GTK_BOX (hbox), progress->details->progress_count_label, FALSE, FALSE, 0);
	gtk_widget_show (progress->details->progress_count_label);
	eel_gtk_label_make_bold (GTK_LABEL (progress->details->progress_count_label));

	/* progress bar */
	progress->details->progress_bar = gtk_progress_bar_new ();
	gtk_progress_bar_set_bar_style (GTK_PROGRESS_BAR (progress->details->progress_bar),
					GTK_PROGRESS_CONTINUOUS);
	gtk_progress_bar_set_orientation (GTK_PROGRESS_BAR (progress->details->progress_bar),
					  GTK_PROGRESS_LEFT_TO_RIGHT);
	gtk_widget_set_usize (progress->details->progress_bar, PROGRESS_BAR_WIDTH, -1);
	gtk_box_pack_start (vbox, progress->details->progress_bar, FALSE, TRUE, 0);
	gtk_widget_show (progress->details->progress_bar);

	titled_label_table = GTK_TABLE (gtk_table_new (3, 2, FALSE));
	gtk_table_set_row_spacings (titled_label_table, 4);
	gtk_table_set_col_spacings (titled_label_table, 4);
	gtk_widget_show (GTK_WIDGET (titled_label_table));

	create_titled_label (titled_label_table, 0,
			     &progress->details->operation_name_label, 
			     &progress->details->item_name);
	create_titled_label (titled_label_table, 1,
			     &progress->details->from_label, 
			     &progress->details->from_path_label);
	create_titled_label (titled_label_table, 2,
			     &progress->details->to_label, 
			     &progress->details->to_path_label);

	gtk_box_pack_start (vbox, GTK_WIDGET (titled_label_table), FALSE, FALSE, 0);
}

static void
nautilus_file_operations_progress_initialize_class (NautilusFileOperationsProgressClass *klass)
{
	GtkObjectClass *object_class;
	GtkWidgetClass *widget_class;
	GnomeDialogClass *dialog_class;

	object_class = GTK_OBJECT_CLASS (klass);
	widget_class = GTK_WIDGET_CLASS (klass);
	dialog_class = GNOME_DIALOG_CLASS (klass);

	object_class->destroy = nautilus_file_operations_progress_destroy;

	/* The progress dialog should not have a title and a close box.
	 * Some broken window manager themes still show the window title.
	 * Make clicking the close box do nothing in that case to prevent
	 * a crash.
	 */
	widget_class->delete_event = delete_event_callback;
	widget_class->map = map_callback;

	dialog_class->close = close_callback;
}

NautilusFileOperationsProgress *
nautilus_file_operations_progress_new (const char *title,
				       const char *operation_string,
				       const char *from_prefix,
				       const char *to_prefix,
				       gulong total_files,
				       gulong total_bytes)
{
	GtkWidget *widget;
	NautilusFileOperationsProgress *progress;

	widget = gtk_widget_new (nautilus_file_operations_progress_get_type (), NULL);
	progress = NAUTILUS_FILE_OPERATIONS_PROGRESS (widget);

	nautilus_file_operations_progress_set_operation_string (progress, operation_string);
	nautilus_file_operations_progress_set_total (progress, total_files, total_bytes);

	gtk_window_set_title (GTK_WINDOW (widget), title);
	gtk_window_set_wmclass (GTK_WINDOW (widget), "file_progress", "Nautilus");

	gnome_dialog_append_button (GNOME_DIALOG (widget),
				    GNOME_STOCK_BUTTON_CANCEL);

	progress->details->from_prefix = from_prefix;
	progress->details->to_prefix = to_prefix;
	
	return progress;
}

void
nautilus_file_operations_progress_set_total (NautilusFileOperationsProgress *progress,
					     gulong files_total,
					     gulong bytes_total)
{
	g_return_if_fail (NAUTILUS_IS_FILE_OPERATIONS_PROGRESS (progress));

	progress->details->files_total = files_total;
	progress->details->bytes_total = bytes_total;

	nautilus_file_operations_progress_update (progress);
}

void
nautilus_file_operations_progress_set_operation_string (NautilusFileOperationsProgress *progress,
							const char *operation_string)
{
	g_return_if_fail (NAUTILUS_IS_FILE_OPERATIONS_PROGRESS (progress));

	gtk_label_set_text (GTK_LABEL (progress->details->progress_title_label),
			    operation_string);
}

void
nautilus_file_operations_progress_new_file (NautilusFileOperationsProgress *progress,
					    const char *progress_verb,
					    const char *item_name,
					    const char *from_path,
					    const char *to_path,
					    const char *from_prefix,
					    const char *to_prefix,
					    gulong file_index,
					    gulong size)
{
	char *progress_count;

	g_return_if_fail (NAUTILUS_IS_FILE_OPERATIONS_PROGRESS (progress));
	g_return_if_fail (GTK_WIDGET_REALIZED (progress));

	progress->details->from_prefix = from_prefix;
	progress->details->to_prefix = to_prefix;

	if (progress->details->bytes_total > 0) {
		/* we haven't set up the file count yet, do not update the progress
		 * count until we do
		 */
		gtk_label_set_text (GTK_LABEL (progress->details->operation_name_label),
				    progress_verb);
		set_text_unescaped_trimmed 
			(EEL_ELLIPSIZING_LABEL (progress->details->item_name),
			 item_name);

		progress_count = g_strdup_printf (_("%ld of %ld"), file_index + 1, 
						  progress->details->files_total);
		gtk_label_set_text (GTK_LABEL (progress->details->progress_count_label), progress_count);
		g_free (progress_count);

		gtk_label_set_text (GTK_LABEL (progress->details->from_label), from_prefix);
		set_text_unescaped_trimmed 
			(EEL_ELLIPSIZING_LABEL (progress->details->from_path_label), from_path);
	
		if (progress->details->to_prefix != NULL && progress->details->to_path_label != NULL) {
			gtk_label_set_text (GTK_LABEL (progress->details->to_label), to_prefix);
			set_text_unescaped_trimmed 
				(EEL_ELLIPSIZING_LABEL (progress->details->to_path_label), to_path);
		}
	}

	nautilus_file_operations_progress_update (progress);
}

void
nautilus_file_operations_progress_clear (NautilusFileOperationsProgress *progress)
{
	gtk_label_set_text (GTK_LABEL (progress->details->from_label), "");
	gtk_label_set_text (GTK_LABEL (progress->details->from_path_label), "");
	gtk_label_set_text (GTK_LABEL (progress->details->to_label), "");
	gtk_label_set_text (GTK_LABEL (progress->details->to_path_label), "");

	progress->details->files_total = 0;
	progress->details->bytes_total = 0;

	nautilus_file_operations_progress_update (progress);
}

void
nautilus_file_operations_progress_update_sizes (NautilusFileOperationsProgress *progress,
						gulong bytes_done_in_file,
						gulong bytes_done)
{
	g_return_if_fail (NAUTILUS_IS_FILE_OPERATIONS_PROGRESS (progress));

	progress->details->bytes_copied = bytes_done;

	nautilus_file_operations_progress_update (progress);
}

static gboolean
delayed_close_callback (gpointer callback_data)
{
	NautilusFileOperationsProgress *progress;

	progress = NAUTILUS_FILE_OPERATIONS_PROGRESS (callback_data);

	progress->details->delayed_close_timeout_id = 0;
	gtk_object_destroy (GTK_OBJECT (progress));
	return FALSE;
}

void
nautilus_file_operations_progress_done (NautilusFileOperationsProgress *progress)
{
	guint time_up;

	if (!GTK_WIDGET_MAPPED (progress)) {
		gtk_object_destroy (GTK_OBJECT (progress));
		return;
	}
	g_assert (progress->details->start_time != 0);

	/* compute time up in milliseconds */
	time_up = (eel_get_system_time () - progress->details->start_time) / 1000;
	if (time_up >= MINIMUM_TIME_UP) {
		gtk_object_destroy (GTK_OBJECT (progress));
		return;
	}
	
	/* Make dialog look "done". */
	gnome_dialog_set_sensitive (GNOME_DIALOG (progress), 0, FALSE);
	gtk_progress_configure (GTK_PROGRESS (progress->details->progress_bar),
				1.0, 0.0, 1.0);

	progress->details->delayed_close_timeout_id = gtk_timeout_add
		(MINIMUM_TIME_UP - time_up,
		 delayed_close_callback,
		 progress);
}