/* info-gtk.c
 * creates the UI for the info frame -
 * controlled through the following interfaces:
 *
 * void show_dive_info(struct dive *dive)
 *
 * called from gtk-ui:
 * GtkWidget *extended_dive_info_widget(void)
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include <sys/time.h>
#include <glib/gi18n.h>

#include "dive.h"
#include "display.h"
#include "display-gtk.h"
#include "divelist.h"
#include "info.h"

typedef enum { EDIT_NEW_DIVE, EDIT_ALL, EDIT_WHEN } edit_control_t;
static GtkEntry *location, *buddy, *divemaster, *rating, *suit;
static GtkTextView *notes;
static GtkListStore *location_list, *people_list, *star_list, *suit_list;

static char *get_text(GtkTextView *view)
{
	GtkTextBuffer *buffer;
	GtkTextIter start;
	GtkTextIter end;

	buffer = gtk_text_view_get_buffer(view);
	gtk_text_buffer_get_start_iter(buffer, &start);
	gtk_text_buffer_get_end_iter(buffer, &end);
	return gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
}

/*
 * Get the string from a combo box.
 *
 * The "master" string is the string of the current dive - we only consider it
 * changed if the old string is either empty, or matches that master string.
 */
static char *get_combo_box_entry_text(GtkComboBox *combo_box, char **textp, const char *master)
{
	const char *newstring = get_active_text(combo_box);
	return evaluate_string_change(newstring, textp, master);
}

#define SET_TEXT_VALUE(x) \
	gtk_entry_set_text(x, dive && dive->x ? dive->x : "")

void show_dive_info(struct dive *dive)
{
	const char *title = get_window_title(dive);
	gtk_window_set_title(GTK_WINDOW(main_window), title);
	free((void *)title);
	SET_TEXT_VALUE(divemaster);
	SET_TEXT_VALUE(buddy);
	SET_TEXT_VALUE(location);
	SET_TEXT_VALUE(suit);
	gtk_entry_set_text(rating, star_strings[dive ? dive->rating : 0]);
	gtk_text_buffer_set_text(gtk_text_view_get_buffer(notes),
		dive && dive->notes ? dive->notes : "", -1);
	/* I'm not quite sure /why/ this is only called when we have no dive
	 * -- need to investigate */
	if (!dive)
		show_dive_equipment(NULL, W_IDX_PRIMARY);
}

static void info_menu_edit_cb(GtkMenuItem *menuitem, gpointer user_data)
{
	if (amount_selected)
		edit_multi_dive_info(NULL);
}

static void add_menu_item(GtkMenuShell *menu, const char *label, const char *icon, void (*cb)(GtkMenuItem *, gpointer))
{
	GtkWidget *item;
	if (icon) {
		GtkWidget *image;
		item = gtk_image_menu_item_new_with_label(label);
		image = gtk_image_new_from_stock(icon, GTK_ICON_SIZE_MENU);
		gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(item), image);
	} else {
		item = gtk_menu_item_new_with_label(label);
	}
	g_signal_connect(item, "activate", G_CALLBACK(cb), NULL);
	gtk_widget_show(item); /* Yes, really */
	gtk_menu_shell_prepend(menu, item);
}

static void populate_popup_cb(GtkTextView *entry, GtkMenuShell *menu, gpointer user_data)
{
	if (amount_selected)
		add_menu_item(menu, _("Edit"), GTK_STOCK_EDIT, info_menu_edit_cb);
}

static GtkEntry *text_value(GtkWidget *box, const char *label)
{
	GtkWidget *widget;
	GtkWidget *frame = gtk_frame_new(label);

	gtk_box_pack_start(GTK_BOX(box), frame, FALSE, TRUE, 0);
	widget = gtk_entry_new();
	gtk_widget_set_can_focus(widget, FALSE);
	gtk_editable_set_editable(GTK_EDITABLE(widget), FALSE);
	gtk_container_add(GTK_CONTAINER(frame), widget);
	g_signal_connect(widget, "populate-popup", G_CALLBACK(populate_popup_cb), NULL);
	return GTK_ENTRY(widget);
}

static GtkEntry *single_text_entry(GtkWidget *box, const char *label, const char *text)
{
	GtkEntry *entry;
	GtkWidget *frame = gtk_frame_new(label);

	gtk_box_pack_start(GTK_BOX(box), frame, FALSE, TRUE, 0);
	entry = GTK_ENTRY(gtk_entry_new());
	gtk_container_add(GTK_CONTAINER(frame), GTK_WIDGET(entry));
	if (text && *text)
		gtk_entry_set_text(entry, text);
	return entry;
}

static GtkComboBox *text_entry(GtkWidget *box, const char *label, GtkListStore *completions, const char *text)
{
	GtkWidget *combo_box;
	GtkWidget *frame = gtk_frame_new(label);

	gtk_box_pack_start(GTK_BOX(box), frame, FALSE, TRUE, 0);

	combo_box = combo_box_with_model_and_entry(completions);
	gtk_container_add(GTK_CONTAINER(frame), combo_box);

	if (text && *text)
		set_active_text(GTK_COMBO_BOX(combo_box), text);

	return GTK_COMBO_BOX(combo_box);
}

enum writable {
	READ_ONLY,
	READ_WRITE
};

static GtkTextView *text_view(GtkWidget *box, const char *label, enum writable writable)
{
	GtkWidget *view, *vbox;
	GtkWidget *frame = gtk_frame_new(label);

	gtk_box_pack_start(GTK_BOX(box), frame, TRUE, TRUE, 0);
	box = gtk_hbox_new(FALSE, 3);
	gtk_container_add(GTK_CONTAINER(frame), box);
	vbox = gtk_vbox_new(FALSE, 3);
	gtk_container_add(GTK_CONTAINER(box), vbox);

	GtkWidget* scrolled_window = gtk_scrolled_window_new(0, 0);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled_window), GTK_SHADOW_IN);

	view = gtk_text_view_new();
	if (writable == READ_ONLY) {
		gtk_widget_set_can_focus(view, FALSE);
		gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
		gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);
		g_signal_connect(view, "populate-popup", G_CALLBACK(populate_popup_cb), NULL);
	}
	gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);
	gtk_container_add(GTK_CONTAINER(scrolled_window), view);
	gtk_box_pack_start(GTK_BOX(vbox), scrolled_window, TRUE, TRUE, 0);
	return GTK_TEXT_VIEW(view);
}

static GtkTreeIter string_entry_location;

static gboolean match_string_entry(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
{
	const char *string = data;
	char *entry;
	int cmp;

	gtk_tree_model_get(model, iter, 0, &entry, -1);
	cmp = strcmp(entry, string);
	if (entry)
		free(entry);

	/* Stop. The entry is bigger than the new one */
	if (cmp > 0)
		return TRUE;

	/* Exact match */
	if (!cmp) {
		found_string_entry = MATCH_EXACT;
		return TRUE;
	}

	string_entry_location = *iter;
	found_string_entry = MATCH_AFTER;
	return FALSE;
}

int match_list(GtkListStore *list, const char *string)
{
	found_string_entry = MATCH_PREPEND;
	gtk_tree_model_foreach(GTK_TREE_MODEL(list), match_string_entry, (void *)string);
	return found_string_entry;
}

void add_string_list_entry(const char *string, GtkListStore *list)
{
	GtkTreeIter *iter, loc;

	if (!string || !*string)
		return;

	switch (match_list(list, string)) {
	case MATCH_EXACT:
		return;
	case MATCH_PREPEND:
		iter = NULL;
		break;
	case MATCH_AFTER:
		iter = &string_entry_location;
		break;
	}
	gtk_list_store_insert_after(list, &loc, iter);
	gtk_list_store_set(list, &loc, 0, string, -1);
}

void add_people(const char *string)
{
	add_string_list_entry(string, people_list);
}

void add_location(const char *string)
{
	add_string_list_entry(string, location_list);
}

void add_suit(const char *string)
{
	add_string_list_entry(string, suit_list);
}

/* this helper function is completely Gtk independent... but I really
 * hope that a new UI would just have a decent star rating widget and
 * we won't need this kludge... so I'll leave this in the -gtk file */
static int get_rating(const char *string)
{
	int rating_val = 0;
	int i;

	for (i = 0; i <= 5; i++)
		if (!strcmp(star_strings[i],string))
			rating_val = i;
	return rating_val;
}

struct dive_info {
	GtkComboBox *location, *divemaster, *buddy, *rating, *suit, *viz;
	GtkEntry *airtemp, *gps;
	GtkWidget *gps_icon;
	GtkTextView *notes;
};

static void save_dive_info_changes(struct dive *dive, struct dive *master, struct dive_info *info, int tags_shown)
{
	char *old_text, *new_text;
	const char *gps_text;
	char *rating_string;
	double newtemp;
	int changed = 0;

	new_text = get_combo_box_entry_text(info->location, &dive->location, master->location);
	if (new_text) {
		add_location(new_text);
		changed = 1;
	}

	gps_text = gtk_entry_get_text(info->gps);
	if (gps_changed(dive, master, gps_text))
		changed = 1;

	new_text = get_combo_box_entry_text(info->divemaster, &dive->divemaster, master->divemaster);
	if (new_text) {
		add_people(new_text);
		changed = 1;
	}

	new_text = get_combo_box_entry_text(info->buddy, &dive->buddy, master->buddy);
	if (new_text) {
		add_people(new_text);
		changed = 1;
	}

	new_text = get_combo_box_entry_text(info->suit, &dive->suit, master->suit);
	if (new_text) {
		add_suit(new_text);
		changed = 1;
	}

	rating_string = strdup(star_strings[dive->rating]);
	new_text = get_combo_box_entry_text(info->rating, &rating_string, star_strings[master->rating]);
	if (new_text) {
		dive->rating = get_rating(rating_string);
		changed = 1;
	}
	free(rating_string);

	rating_string = strdup(star_strings[dive->visibility]);
	new_text = get_combo_box_entry_text(info->viz, &rating_string, star_strings[master->visibility]);
	if (new_text) {
		dive->visibility = get_rating(rating_string);
		changed = 1;
	}
	free(rating_string);

	new_text = (char *)gtk_entry_get_text(info->airtemp);
	if (sscanf(new_text, "%lf", &newtemp) == 1) {
		unsigned long mkelvin;
		switch (prefs.units.temperature) {
		case CELSIUS:
			mkelvin = C_to_mkelvin(newtemp);
			break;
		case FAHRENHEIT:
			mkelvin = F_to_mkelvin(newtemp);
			break;
		default:
			mkelvin = 0;
		}
		if (mkelvin != dive->airtemp.mkelvin && dive->airtemp.mkelvin == master->airtemp.mkelvin) {
			dive->airtemp.mkelvin = mkelvin;
			changed = 1;
		}
	}

	if (info->notes) {
		old_text = dive->notes;
		dive->notes = get_text(info->notes);
		if (text_changed(old_text,dive->notes))
			changed = 1;
		if (old_text)
			g_free(old_text);
	}
	if (tags_shown && dive->dive_tags != master->dive_tags) {
		changed = 1;
		dive->dive_tags = master->dive_tags;
		/* if a dive is selected and we aren't showing invalid dives and it is
		 * now marked as invalid we need to deselect it to keep the selection
		 * state consistent */
		if (!prefs.display_invalid_dives && dive->selected && dive->dive_tags & DTAG_INVALID) {
			dive->selected = 0;
			amount_selected--;
		}
	}
	if (changed) {
		mark_divelist_changed(TRUE);
		update_dive(dive);
	}
}

static void dive_trip_widget(GtkWidget *box, dive_trip_t *trip, struct dive_info *info)
{
	GtkWidget *hbox, *label;
	char buffer[128] = N_("Edit trip summary");

	label = gtk_label_new(_(buffer));
	gtk_box_pack_start(GTK_BOX(box), label, FALSE, TRUE, 0);

	info->location = text_entry(box, _("Location"), location_list, trip->location);

	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);

	info->notes = text_view(box, _("Notes"), READ_WRITE);
	if (trip->notes && *trip->notes)
		gtk_text_buffer_set_text(gtk_text_view_get_buffer(info->notes), trip->notes, -1);
}

struct location_update {
	char text[45];
	char set_by_hand;
	GtkEntry *entry;
	struct dive *dive;
	void (*callback)(float, float);
} location_update;

static void update_gps_entry(int lat, int lon)
{
	if (location_update.entry) {
		print_gps_coordinates(location_update.text, 45, lat, lon);
		gtk_entry_set_text(location_update.entry, location_update.text);
	}
}

static void update_gps_entry_callback(float lat, float lon)
{
	update_gps_entry(lat * 1000000, lon * 1000000);
	location_update.set_by_hand = 1;
}

static gboolean gps_map_callback(GtkWidget *w, gpointer data)
{
	double latitude, longitude;
	const char *gps_text = NULL;
	struct dive fake_dive;

	memset(&fake_dive, 0, sizeof(fake_dive));
	if (location_update.entry) {
		gps_text = gtk_entry_get_text(location_update.entry);
		parse_gps_text(gps_text, &latitude, &longitude);
		fake_dive.latitude.udeg = rint(latitude * 1000000);
		fake_dive.longitude.udeg = rint(longitude * 1000000);
	}
	show_gps_location(&fake_dive, update_gps_entry_callback);
	return TRUE;
}

/*
 * If somebody sets the string by editing the text entry,
 * we consider a clear string an opportunity to set things
 * automatically.
 *
 * A non-empty string, on the other hand, means that we
 * should *not* touch it when we change the location field.
 */
static gboolean gps_entry_change_cb(GtkEntry *gps, GdkEvent *event, gpointer userdata)
{
	const char *string = gtk_entry_get_text(gps);

	/* A clear string is never considered to be "set" */
	if (!string) {
		location_update.set_by_hand = 0;
		return FALSE;
	}

	/*
	 * If it wasn't set by hand, and it hasn't changed,
	 * it's still not set by hand
	 */
	if (!location_update.set_by_hand) {
		if (!strcmp(location_update.text, string))
			return FALSE;
	}

	/* Otherwise, check if it's all empty.. */
	while (g_ascii_isspace(*string))
		string++;
	location_update.set_by_hand = !!*string;

	return FALSE;
}

static void location_entry_change_cb(GtkComboBox *location, gpointer *userdata)
{
	int i;
	struct dive *dive;
	const char *name;

	/*
	 * Don't do any automatic gps changes of entries that have been
	 * explicitly set to some value!
	 */
	if (location_update.set_by_hand)
		return;

	name = get_active_text(location);
	for_each_dive(i, dive) {
		if (!dive_has_gps_location(dive))
			continue;
		if (!dive->location || strcasecmp(dive->location, name))
			continue;
		update_gps_entry(dive->latitude.udeg, dive->longitude.udeg);
		return;
	}
	update_gps_entry(0, 0);
}

static void set_dive_button_label(GtkWidget *button, struct dive *dive)
{
	char buffer[256];

	/* if there is only one dc and it has no samples we can edit the depth, too */
	if (dive->dc.next || dive->dc.samples)
		divename(buffer, sizeof(buffer), dive, _("(click to edit date/time)"));
	else
		divename(buffer, sizeof(buffer), dive, _("(click to edit date/time/depth)"));
	gtk_button_set_label(GTK_BUTTON(button), buffer);
}

static int dive_time_widget(struct dive *dive, edit_control_t editing);

static gboolean base_data_cb(GtkWidget *w, GdkEvent *event, gpointer _data)
{
	struct dive *dive = _data;

	/* if there are more than one divecomputers or if there are any sample
	 * then only the start time (well, date and time) can be changed,
	 * otherwise (this is most likely a dive that was added manually in Subsurface
	 * and we can edit duration, max and mean depth, too */
	if (dive->dc.next || dive->dc.samples)
		dive_time_widget(dive, EDIT_WHEN);
	else
		dive_time_widget(dive, EDIT_ALL);
	set_dive_button_label(w, dive);
	return FALSE;
}

void divetag_toggle_cb(GtkWidget *widget, gpointer data)
{
	int togglebit = GPOINTER_TO_INT (data);
	if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget)))
		edit_dive.dive_tags |= togglebit;
	else
		edit_dive.dive_tags &= ~togglebit;
}

static void dive_info_widget(GtkWidget *obox, struct dive *dive, struct dive_info *info, int multi, int *show_tags)
{
	GtkWidget *hbox, *frame, *equipment, *ibox, *box, *button, *sbox, *framebox;
	GtkWidget *image;
	char buffer[256];
	char airtemp[10];
	const char *unit;
	double value;
	int i, tags;
	struct dive *otherdive;

	if (multi) {
		GtkWidget *label;
		snprintf(buffer, sizeof(buffer), "%s", _("Edit multiple dives"));
		label = gtk_label_new(buffer);
		gtk_box_pack_start(GTK_BOX(obox), label, FALSE, TRUE, 0);
	} else {
		GtkWidget *basedata = gtk_button_new_with_label(buffer);
		set_dive_button_label(basedata, dive);
		g_signal_connect(G_OBJECT(basedata), "button-press-event", G_CALLBACK(base_data_cb), dive);
		gtk_box_pack_start(GTK_BOX(obox), basedata, FALSE, TRUE, 0);
	}
	/* two column layout (inner hbox ibox) within the outer vbox (obox) we are given */
	ibox = gtk_hbox_new(FALSE, 0);
	gtk_box_pack_start(GTK_BOX(obox), ibox, TRUE, TRUE, 0);
	box = gtk_vbox_new(FALSE, 0);
	gtk_box_pack_start(GTK_BOX(ibox), box, TRUE, TRUE, 0);

	info->location = text_entry(box, _("Location"), location_list, dive->location);
	g_signal_connect(G_OBJECT(info->location), "changed", G_CALLBACK(location_entry_change_cb), NULL);

	hbox = gtk_hbox_new(FALSE, 2);
	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);
	info->gps = single_text_entry(hbox, _("GPS (WGS84 or GPS format)"), NULL);

	location_update.entry = info->gps;
	location_update.dive = dive;
	update_gps_entry(dive->latitude.udeg, dive->longitude.udeg);
	location_update.set_by_hand = !!location_update.text[0];

	gtk_widget_add_events(GTK_WIDGET(info->gps), GDK_FOCUS_CHANGE_MASK);
	g_signal_connect(G_OBJECT(info->gps), "focus-out-event", G_CALLBACK(gps_entry_change_cb), NULL);
	gtk_entry_set_width_chars(info->gps, 30);
	info->gps_icon = gtk_button_new_with_label(_("Pick on map"));
	gtk_box_pack_start(GTK_BOX(hbox), info->gps_icon, FALSE, FALSE, 6);
	image = gtk_image_new_from_pixbuf(get_gps_icon());
	gtk_image_set_pixel_size(GTK_IMAGE(image), 128);
	gtk_button_set_image(GTK_BUTTON(info->gps_icon), image);

	g_signal_connect(G_OBJECT(info->gps_icon), "clicked", G_CALLBACK(gps_map_callback), NULL);
	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);

	info->divemaster = text_entry(hbox, _("Dive master"), people_list, dive->divemaster);
	info->buddy = text_entry(hbox, _("Buddy"), people_list, dive->buddy);

	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);

	info->rating = text_entry(hbox, _("Rating"), star_list, star_strings[dive->rating]);
	info->suit = text_entry(hbox, _("Suit"), suit_list, dive->suit);

	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);

	info->viz = text_entry(hbox, _("Visibility"), star_list, star_strings[dive->visibility]);

	value = get_temp_units(dive->airtemp.mkelvin, &unit);
	snprintf(buffer, sizeof(buffer), _("Air Temp in %s"), unit);
	if (dive->airtemp.mkelvin)
		snprintf(airtemp, sizeof(airtemp), "%.1f", value);
	else
		airtemp[0] = '\0';
	info->airtemp = single_text_entry(hbox, buffer, airtemp);

	frame = gtk_frame_new(_("Dive Tags"));
	gtk_box_pack_start(GTK_BOX(box), frame, FALSE, FALSE, 0);

	framebox = gtk_vbox_new(FALSE, 3);
	gtk_container_add(GTK_CONTAINER(frame), framebox);

	/* we only want to show the tags if we have a single dive or if all selected
	 * dives have the exact same set of tags (like none at all right after import) */
	i = 0;
	*show_tags = 1;
	tags = dive->dive_tags;
	for_each_dive(i, otherdive)
		if (otherdive && otherdive->selected && otherdive->dive_tags != tags)
			*show_tags = 0;
	if (*show_tags) {
		/* check boxes for the (currently fixed) list of tags;
		 * let's do 5 per row */
		const int cols = 5;
		int rows = DTAG_NR / cols + (DTAG_NR % cols) ? 1 : 0;
		GtkWidget *table = gtk_table_new(rows, cols, TRUE);
		for (i = 0; i < DTAG_NR; i++) {
			int x = i % cols;
			int y = i / cols;
			button = gtk_check_button_new_with_label(_(dtag_names[i]));
			gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), dive->dive_tags & (1 << i));
			gtk_table_attach_defaults(GTK_TABLE(table), button, x, x+1, y, y+1);
			g_signal_connect(G_OBJECT(button), "toggled", G_CALLBACK(divetag_toggle_cb),
					 GINT_TO_POINTER(1 << i));
		}
		gtk_box_pack_start(GTK_BOX(framebox), table, TRUE, FALSE, 3);
	} else {
		sbox = gtk_label_new(_("Tags are only shown if they are identical for all edited dives"));
		gtk_box_pack_start(GTK_BOX(framebox), sbox, TRUE, FALSE, 3);
	}
	/* only show notes if editing a single dive */
	if (multi) {
		info->notes = NULL;
	} else {
		info->notes = text_view(box, _("Notes"), READ_WRITE);
		gtk_widget_set_size_request(GTK_WIDGET(info->notes), -1, 128);
		if (dive->notes && *dive->notes)
			gtk_text_buffer_set_text(gtk_text_view_get_buffer(info->notes), dive->notes, -1);
	}
	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(ibox), hbox, TRUE, TRUE, 0);

	/* create a secondary Equipment widget */
	frame = gtk_frame_new(_("Equipment"));
	equipment = equipment_widget(W_IDX_SECONDARY);
	gtk_container_add(GTK_CONTAINER(frame), equipment);
	gtk_box_pack_start(GTK_BOX(hbox), frame, TRUE, TRUE, 0);
}

gboolean edit_trip(dive_trip_t *trip)
{
	GtkWidget *dialog, *vbox;
	int success;
	gboolean changed = FALSE;
	char *old_text, *new_text;
	struct dive_info info;

	memset(&info, 0, sizeof(struct dive_info));
	dialog = gtk_dialog_new_with_buttons(_("Edit Trip Info"),
		GTK_WINDOW(main_window),
		GTK_DIALOG_DESTROY_WITH_PARENT,
		GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
		GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
		NULL);
	gtk_window_set_default_size(GTK_WINDOW(dialog), 400, 300);
	vbox = gtk_dialog_get_content_area(GTK_DIALOG(dialog));
	dive_trip_widget(vbox, trip, &info);
	gtk_widget_show_all(dialog);
	success = gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT;
	if (success) {
		/* we need to store the edited location and notes */
		new_text = get_combo_box_entry_text(info.location, &trip->location, trip->location);
		if (new_text) {
			add_location(new_text);
			changed = TRUE;
		}
		if (info.notes) {
			old_text = trip->notes;
			trip->notes = get_text(info.notes);
			if (text_changed(old_text, trip->notes))
				changed = TRUE;
			if (old_text)
				g_free(old_text);
		}
		if (changed)
			mark_divelist_changed(TRUE);
	}
	gtk_widget_destroy(dialog);
	return changed;
}

int edit_multi_dive_info(struct dive *single_dive)
{
	int success;
	GtkWidget *dialog, *vbox, *scrolled_window, *viewport;
	GtkRequisition size;
	struct dive_info info;
	struct dive *master;
	int multi;
	int tags_shown;

	scrolled_window = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
		GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
	dialog = gtk_dialog_new_with_buttons(_("Dive Info"),
		GTK_WINDOW(main_window),
		GTK_DIALOG_DESTROY_WITH_PARENT,
		GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
		GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
		NULL);

	vbox = gtk_dialog_get_content_area(GTK_DIALOG(dialog));
	gtk_box_pack_start(GTK_BOX(vbox), scrolled_window, TRUE, TRUE, 0);
	vbox = g_object_new(GTK_TYPE_VBOX, NULL);
	gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scrolled_window), vbox);
	master = single_dive;
	if (!master)
		master = current_dive;
	if (!master)
		return 0;
	/* See if we should use multi dive mode */
	multi = FALSE;
	if (!single_dive) {
		int i;
		struct dive *dive;

		for_each_dive(i, dive) {
			if (dive != master && dive->selected) {
				multi = TRUE;
				break;
			}
		}
	}
	/* edit a temporary copy of the master dive;
	 * edit_dive is a global dive structure that is modified by the
	 * cylinder / weightsystem dialogs if we open W_IDX_SECONDARY
	 * edit widgets as we do here */
	memcpy(&edit_dive, master, sizeof(struct dive));

	dive_info_widget(vbox, &edit_dive, &info, multi, &tags_shown);
	save_equipment_data(&edit_dive);
	gtk_widget_show_all(dialog);
	viewport = gtk_widget_get_ancestor(vbox, GTK_TYPE_VIEWPORT);
#if GTK_CHECK_VERSION(3,0,0)
	gtk_widget_get_preferred_size(viewport, NULL, &size);
#else
	gtk_widget_size_request(viewport, &size);
#endif
	gtk_widget_set_size_request(scrolled_window, size.width, size.height);
	/* add the equipment post the "blank" layout estimate */
	show_dive_equipment(&edit_dive, W_IDX_SECONDARY);
	success = gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT;
	if (success) {
		mark_divelist_changed(TRUE);
		/* Update the non-current selected dives first */
		if (!single_dive) {
			int i;
			struct dive *dive;

			for_each_dive(i, dive) {
				if (dive == master || !dive->selected)
					continue;
				/* copy all "info" fields */
				save_dive_info_changes(dive, &edit_dive, &info, tags_shown);
				/* copy the cylinders / weightsystems */
				update_equipment_data(dive, &edit_dive);
				/* this is extremely inefficient... it loops through all
				   dives to find the right one - but we KNOW the index already */
				update_cylinder_related_info(dive);
				flush_divelist(dive);
			}
		}

		/* Update the master dive last! */
		save_dive_info_changes(master, &edit_dive, &info, tags_shown);
		update_equipment_data(master, &edit_dive);
		update_cylinder_related_info(master);
		/* if there was only one dive we might also have changed dive->when
		 * or even the duration and depth information (in a dive without samples) */
		if (! multi) {
			update_time_depth(master, &edit_dive);
			/* these values could have changed because of the edit - so let's
			 * recreate them */
			master->duration.seconds = 0;
			master->maxdepth.mm = 0;
			master->meandepth.mm = 0;
			(void)fixup_dive(master);
		}
		dive_list_update_dives();
	}
	gtk_widget_destroy(dialog);
	location_update.entry = NULL;

	return success;
}

static GtkWidget *frame_box(GtkWidget *vbox, const char *fmt, ...)
{
	va_list ap;
	char buffer[128];
	GtkWidget *frame, *hbox;

	va_start(ap, fmt);
	vsnprintf(buffer, sizeof(buffer), fmt, ap);
	va_end(ap);

	frame = gtk_frame_new(buffer);
	gtk_box_pack_start(GTK_BOX(vbox), frame, FALSE, TRUE, 0);
	hbox = gtk_hbox_new(0, 3);
	gtk_container_add(GTK_CONTAINER(frame), hbox);
	return hbox;
}

/* returns the dialog plus pointers to the calendar, hour and minute widget
 * plus the hbox that holds the time entry (in case the caller wants to put
 * a duration entry widget next to the time entry widget */
GtkWidget *create_date_time_widget(struct tm *time, GtkWidget **cal, GtkWidget **h,
						    GtkWidget **m, GtkWidget **timehbox)
{
	GtkWidget *dialog;
	GtkWidget *hbox, *vbox;
	GtkWidget *label;

	dialog = gtk_dialog_new_with_buttons(_("Date and Time"),
		GTK_WINDOW(main_window),
		GTK_DIALOG_DESTROY_WITH_PARENT,
		GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
		GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
		NULL);

	vbox = gtk_dialog_get_content_area(GTK_DIALOG(dialog));

	/* Calendar hbox */
	hbox = frame_box(vbox, _("Date:"));
	*cal = gtk_calendar_new();
	gtk_box_pack_start(GTK_BOX(hbox), *cal, FALSE, TRUE, 0);

	/* Time hbox */
	*timehbox = gtk_hbox_new(TRUE, 3);
	gtk_box_pack_start(GTK_BOX(vbox), *timehbox, FALSE, FALSE, 0);
	hbox = frame_box(*timehbox, _("Time"));

	*h = gtk_spin_button_new_with_range (0.0, 23.0, 1.0);
	*m = gtk_spin_button_new_with_range (0.0, 59.0, 1.0);

	gtk_calendar_select_month(GTK_CALENDAR(*cal), time->tm_mon, time->tm_year + 1900);
	gtk_calendar_select_day(GTK_CALENDAR(*cal), time->tm_mday);
	gtk_spin_button_set_value(GTK_SPIN_BUTTON(*h), time->tm_hour);
	gtk_spin_button_set_value(GTK_SPIN_BUTTON(*m), time->tm_min);

	gtk_spin_button_set_wrap(GTK_SPIN_BUTTON(*h), TRUE);
	gtk_spin_button_set_wrap(GTK_SPIN_BUTTON(*m), TRUE);

	gtk_box_pack_end(GTK_BOX(hbox), *m, FALSE, FALSE, 0);
	label = gtk_label_new(":");
	gtk_box_pack_end(GTK_BOX(hbox), label, FALSE, FALSE, 0);
	gtk_box_pack_end(GTK_BOX(hbox), *h, FALSE, FALSE, 0);

	return dialog;
}

static int mm_from_spinbutton(GtkWidget *depth)
{
	int result;
	double val = gtk_spin_button_get_value(GTK_SPIN_BUTTON(depth));
	if (prefs.units.length == FEET) {
		result = feet_to_mm(val);
	} else {
		result = val * 1000 + 0.5;
	}
	return result;
}

static int dive_time_widget(struct dive *dive, edit_control_t editing)
{
	GtkWidget *dialog;
	GtkWidget *cal, *vbox, *hbox, *box;
	GtkWidget *h, *m;
	GtkWidget *duration, *depth, *avgdepth;
	guint yval, mval, dval;
	struct tm tm, *time;
	int success;
	double depthinterval;

	/*
	 * If we have a dive selected, 'add dive' will default
	 * to one hour after the end of that dive. Otherwise,
	 * we'll just take the current time.
	 */
	if (editing != EDIT_NEW_DIVE) {
		utc_mkdate(dive->when, &tm);
		time = &tm;
	} else if (amount_selected == 1) {
		timestamp_t when = current_dive->when;
		when += current_dive->duration.seconds;
		when += 60*60;
		utc_mkdate(when, &tm);
		time = &tm;
	} else {
		time_t now;
		struct timeval tv;
		gettimeofday(&tv, NULL);
		now = tv.tv_sec;
		time = localtime(&now);
	}
	dialog = create_date_time_widget(time, &cal, &h, &m, &hbox);
	vbox = gtk_dialog_get_content_area(GTK_DIALOG(dialog));

	if (editing != EDIT_WHEN) {
		/* Duration box */
		box = frame_box(hbox, _("Duration (min)"));
		duration = gtk_spin_button_new_with_range (0.0, 1000.0, 1.0);
		if (editing != EDIT_NEW_DIVE)
			gtk_spin_button_set_value(GTK_SPIN_BUTTON(duration), dive->dc.duration.seconds / 60.0);
		gtk_box_pack_end(GTK_BOX(box), duration, FALSE, FALSE, 0);

		hbox = gtk_hbox_new(TRUE, 3);
		gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);

		/* Depth box */
		box = frame_box(hbox, _("Max Depth (%s):"), prefs.units.length == FEET ? _("ft") : _("m"));
		if (prefs.units.length == FEET) {
			depthinterval = 1.0;
		} else {
			depthinterval = 0.1;
		}
		depth = gtk_spin_button_new_with_range (0.0, 1000.0, depthinterval);
		if (editing != EDIT_NEW_DIVE) {
			if (prefs.units.length == FEET) {
				gtk_spin_button_set_value(GTK_SPIN_BUTTON(depth), mm_to_feet(dive->dc.maxdepth.mm));
			} else {
				gtk_spin_button_set_value(GTK_SPIN_BUTTON(depth), dive->dc.maxdepth.mm / 1000.0);
			}
		}
		gtk_box_pack_end(GTK_BOX(box), depth, FALSE, FALSE, 0);

		box = frame_box(hbox, _("Avg Depth (%s):"), prefs.units.length == FEET ? _("ft") : _("m"));
		if (prefs.units.length == FEET) {
			depthinterval = 1.0;
		} else {
			depthinterval = 0.1;
		}
		avgdepth = gtk_spin_button_new_with_range (0.0, 1000.0, depthinterval);
		if (editing != EDIT_NEW_DIVE) {
			if (prefs.units.length == FEET) {
				gtk_spin_button_set_value(GTK_SPIN_BUTTON(avgdepth), mm_to_feet(dive->dc.meandepth.mm));
			} else {
				gtk_spin_button_set_value(GTK_SPIN_BUTTON(avgdepth), dive->dc.meandepth.mm / 1000.0);
			}
		}
		gtk_box_pack_end(GTK_BOX(box), avgdepth, FALSE, FALSE, 0);
	}
	/* All done, show it and wait for editing */
	gtk_widget_show_all(dialog);
	success = gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT;
	if (!success) {
		gtk_widget_destroy(dialog);
		return 0;
	}

	memset(&tm, 0, sizeof(tm));
	gtk_calendar_get_date(GTK_CALENDAR(cal), &yval, &mval, &dval);
	tm.tm_year = yval;
	tm.tm_mon = mval;
	tm.tm_mday = dval;

	tm.tm_hour = gtk_spin_button_get_value(GTK_SPIN_BUTTON(h));
	tm.tm_min = gtk_spin_button_get_value(GTK_SPIN_BUTTON(m));

	if (editing != EDIT_WHEN) {
		dive->dc.maxdepth.mm = mm_from_spinbutton(depth);
		dive->dc.meandepth.mm = mm_from_spinbutton(avgdepth);
		dive->dc.duration.seconds = gtk_spin_button_get_value(GTK_SPIN_BUTTON(duration))*60;
	}
	gtk_widget_destroy(dialog);
	dive->when = utc_mktime(&tm);

	return 1;
}

int add_new_dive(struct dive *dive)
{
	if (!dive)
		return 0;

	if (!dive_time_widget(dive, EDIT_NEW_DIVE))
		return 0;

	return edit_dive_info(dive, TRUE);
}

GtkWidget *extended_dive_info_widget(void)
{
	GtkWidget *vbox, *hbox;
	vbox = gtk_vbox_new(FALSE, 6);

	people_list = gtk_list_store_new(1, G_TYPE_STRING);
	location_list = gtk_list_store_new(1, G_TYPE_STRING);
	star_list = gtk_list_store_new(1, G_TYPE_STRING);
	add_string_list_entry(star_strings[0], star_list);
	add_string_list_entry(star_strings[1], star_list);
	add_string_list_entry(star_strings[2], star_list);
	add_string_list_entry(star_strings[3], star_list);
	add_string_list_entry(star_strings[4], star_list);
	add_string_list_entry(star_strings[5], star_list);
	suit_list = gtk_list_store_new(1, G_TYPE_STRING);

	gtk_container_set_border_width(GTK_CONTAINER(vbox), 6);
	location = text_value(vbox, _("Location"));

	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);

	divemaster = text_value(hbox, _("Divemaster"));
	buddy = text_value(hbox, _("Buddy"));

	hbox = gtk_hbox_new(FALSE, 3);
	gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);

	rating = text_value(hbox, _("Rating"));
	suit = text_value(hbox, _("Suit"));

	notes = text_view(vbox, _("Notes"), READ_ONLY);
	return vbox;
}

void info_widget_destroy(void)
{
	g_object_unref(people_list);
	g_object_unref(location_list);
	g_object_unref(star_list);
	g_object_unref(suit_list);
}