/*
 *      filebrowser.c - this file is part of Geany, a fast and lightweight IDE
 *
 *      Copyright 2007 Enrico Tröger <enrico.troeger@uvena.de>
 *      Copyright 2007 Nick Treleaven <nick.treleaven@btinternet.com>
 *
 *      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 Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 *
 * $Id$
 */

/* Sidebar file browser plugin. */

#include "geany.h"

#include <gdk/gdkkeysyms.h>

#include "support.h"
#include "prefs.h"
#include "document.h"
#include "utils.h"
#include "plugindata.h"


PluginFields	*plugin_fields;
GeanyData		*geany_data;


VERSION_CHECK(26)

PLUGIN_INFO(_("File Browser"), _("Adds a file browser tab to the sidebar."), "0.1")


#define doc_array	geany_data->doc_array
#define documents	geany_data->document
#define utils		geany_data->utils
#define ui			geany_data->ui
#define support		geany_data->support
#define tm			geany_data->tm


enum
{
	FILEVIEW_COLUMN_ICON = 0,
	FILEVIEW_COLUMN_NAME,
	FILEVIEW_N_COLUMNS,
};

static gboolean show_hidden_files = FALSE;
static gboolean hide_object_files = TRUE;

static GtkWidget	*file_view;
static GtkListStore	*file_store;
static GtkTreeIter	*last_dir_iter = NULL;

static GtkWidget	*path_entry;
static gchar		*current_dir = NULL;	// in locale-encoding


// Returns: whether name should be hidden.
static gboolean check_hidden(const gchar *basename)
{
	gsize len;

	if (! NZV(basename))
		return FALSE;

	if (basename[0] == '.')
		return TRUE;

	len = strlen(basename);
	if (basename[len - 1] == '~')
		return TRUE;

	if (hide_object_files)
	{
		const gchar *exts[] = {".o", ".obj", ".so", ".dll", ".a", ".lib"};
		guint i;

		for (i = 0; i < G_N_ELEMENTS(exts); i++)
		{
			const gchar *ext = exts[i];

			if (utils->str_equal(&basename[len - strlen(ext)], ext))
				return TRUE;
		}
	}
	return FALSE;
}


// name is in locale encoding
static void add_item(const gchar *name)
{
	GtkTreeIter iter;
	gchar *fname, *utf8_name;
	gboolean dir;

	if (! show_hidden_files && check_hidden(name))
		return;

	fname = g_strconcat(current_dir, G_DIR_SEPARATOR_S, name, NULL);
	dir = g_file_test(fname, G_FILE_TEST_IS_DIR);
	g_free(fname);

	if (dir)
	{
		if (last_dir_iter == NULL)
			gtk_list_store_prepend(file_store, &iter);
		else
		{
			gtk_list_store_insert_after(file_store, &iter, last_dir_iter);
			gtk_tree_iter_free(last_dir_iter);
		}
		last_dir_iter = gtk_tree_iter_copy(&iter);
	}
	else
		gtk_list_store_append(file_store, &iter);

	utf8_name = utils->get_utf8_from_locale(name);

	gtk_list_store_set(file_store, &iter,
		FILEVIEW_COLUMN_ICON, (dir) ? GTK_STOCK_DIRECTORY : GTK_STOCK_FILE,
		FILEVIEW_COLUMN_NAME, utf8_name, -1);
	g_free(utf8_name);
}


static void clear()
{
	gtk_list_store_clear(file_store);

	// reset the directory item pointer
	if (last_dir_iter != NULL)
		gtk_tree_iter_free(last_dir_iter);
	last_dir_iter = NULL;
}


// recreate the tree model from current_dir.
static void refresh()
{
	gchar *utf8_dir;
	GSList *list;

	clear();

	// TODO: really, we don't want to dereference symlinks
	setptr(current_dir, tm->get_real_path(current_dir));

	utf8_dir = utils->get_utf8_from_locale(current_dir);
	gtk_entry_set_text(GTK_ENTRY(path_entry), utf8_dir);
	g_free(utf8_dir);

	list = utils->get_file_list(current_dir, NULL, NULL);
	if (list != NULL)
	{
		g_slist_foreach(list, (GFunc) add_item, NULL);
		g_slist_foreach(list, (GFunc) g_free, NULL);
		g_slist_free(list);
	}
}


static void on_current_path()
{
	gchar *fname;
	gchar *dir;
	gint idx = documents->get_cur_idx();

	if (! DOC_IDX_VALID(idx))
		return;

	fname = DOC_FILENAME(idx);
	fname = utils->get_locale_from_utf8(fname);
	dir = g_path_get_dirname(fname);
	g_free(fname);

	setptr(current_dir, dir);
	refresh();
}


static void handle_selection(GList *list, GtkTreeSelection *treesel)
{
	GList *item;
	GtkTreeModel *model = GTK_TREE_MODEL(file_store);
	GtkTreePath *treepath;
	GtkTreeIter iter;
	gboolean dir_found = FALSE;

	for (item = list; item != NULL; item = g_list_next(item))
	{
		gchar *icon;

		treepath = (GtkTreePath*) item->data;
		gtk_tree_model_get_iter(model, &iter, treepath);
		gtk_tree_model_get(model, &iter, FILEVIEW_COLUMN_ICON, &icon, -1);

		if (utils->str_equal(icon, GTK_STOCK_DIRECTORY))
		{
			dir_found = TRUE;
			g_free(icon);
			break;
		}
		g_free(icon);
	}

	if (dir_found && gtk_tree_selection_count_selected_rows(treesel) > 1)
	{
		ui->set_statusbar(FALSE, _("Too many items selected!"));
		return;
	}

	for (item = list; item != NULL; item = g_list_next(item))
	{
		gchar *name, *fname;

		treepath = (GtkTreePath*) item->data;
		gtk_tree_model_get_iter(model, &iter, treepath);
		gtk_tree_model_get(model, &iter, FILEVIEW_COLUMN_NAME, &name, -1);

		setptr(name, utils->get_locale_from_utf8(name));
		fname = g_strconcat(current_dir, G_DIR_SEPARATOR_S, name, NULL);
		g_free(name);

		if (dir_found)
		{
			setptr(current_dir, fname);
			refresh();
			return;
		}
		else
		{
			documents->open_file(fname, FALSE, NULL, NULL);
			g_free(fname);
		}
	}
}


static void open_selected_files()
{
	GtkTreeSelection *treesel;
	GtkTreeModel *model;
	GList *list;

	treesel = gtk_tree_view_get_selection(GTK_TREE_VIEW(file_view));

	list = gtk_tree_selection_get_selected_rows(treesel, &model);
	handle_selection(list, treesel);

	g_list_foreach(list, (GFunc) gtk_tree_path_free, NULL);
	g_list_free(list);
}


static gboolean on_button_press(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
	if (event->button == 1 && event->type == GDK_2BUTTON_PRESS)
		open_selected_files();
	return FALSE;
}


static void on_go_home()
{
	setptr(current_dir, g_strdup(g_get_home_dir()));
	refresh();
}


static void on_go_up()
{
	setptr(current_dir, g_build_path(G_DIR_SEPARATOR_S, current_dir, "..", NULL));
	refresh();
}


static gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
	if (event->keyval == GDK_Return
		|| event->keyval == GDK_ISO_Enter
		|| event->keyval == GDK_KP_Enter
		|| event->keyval == GDK_space)
		open_selected_files();

	if ((event->keyval == GDK_Up ||
		event->keyval == GDK_KP_Up) &&
		(event->state & GDK_MOD1_MASK))	// FIXME: Alt-Up doesn't seem to work!
		on_go_up();
	return FALSE;
}


static void prepare_file_view()
{
	GtkCellRenderer *text_renderer, *icon_renderer;
	GtkTreeViewColumn *column;
	GtkTreeSelection *select;
	PangoFontDescription *pfd;

	file_store = gtk_list_store_new(FILEVIEW_N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING);

	gtk_tree_view_set_model(GTK_TREE_VIEW(file_view), GTK_TREE_MODEL(file_store));

	icon_renderer = gtk_cell_renderer_pixbuf_new();
	text_renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new();
    gtk_tree_view_column_pack_start(column, icon_renderer, FALSE);
  	gtk_tree_view_column_set_attributes(column, icon_renderer, "stock-id", FILEVIEW_COLUMN_ICON, NULL);
    gtk_tree_view_column_pack_start(column, text_renderer, TRUE);
  	gtk_tree_view_column_set_attributes(column, text_renderer, "text", FILEVIEW_COLUMN_NAME, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(file_view), column);
	gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(file_view), FALSE);

	gtk_tree_view_set_enable_search(GTK_TREE_VIEW(file_view), TRUE);
	gtk_tree_view_set_search_column(GTK_TREE_VIEW(file_view), FILEVIEW_COLUMN_NAME);

	pfd = pango_font_description_from_string(geany_data->prefs->tagbar_font);
	gtk_widget_modify_font(file_view, pfd);
	pango_font_description_free(pfd);

	// selection handling
	select = gtk_tree_view_get_selection(GTK_TREE_VIEW(file_view));
	gtk_tree_selection_set_mode(select, GTK_SELECTION_MULTIPLE);

	g_signal_connect(G_OBJECT(file_view), "realize", G_CALLBACK(on_current_path), NULL);
	g_signal_connect(G_OBJECT(file_view), "button-press-event",
		G_CALLBACK(on_button_press), NULL);
	g_signal_connect(G_OBJECT(file_view), "key-press-event",
		G_CALLBACK(on_key_press), NULL);
}


void init(GeanyData *data)
{
	GtkWidget *scrollwin, *wid, *vbox, *toolbar;
	GtkTooltips *tooltips = GTK_TOOLTIPS(support->lookup_widget(
		geany_data->app->window, "tooltips"));

	file_view = gtk_tree_view_new();
	prepare_file_view();

	vbox = gtk_vbox_new(FALSE, 0);

	toolbar = gtk_toolbar_new();
	gtk_toolbar_set_icon_size(GTK_TOOLBAR(toolbar), GTK_ICON_SIZE_MENU);

	wid = (GtkWidget *) gtk_tool_button_new_from_stock(GTK_STOCK_GO_UP);
	gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(wid), tooltips,
		_("Up"), NULL);
	g_signal_connect(G_OBJECT(wid), "clicked", G_CALLBACK(on_go_up), NULL);
	gtk_container_add(GTK_CONTAINER(toolbar), wid);

	wid = (GtkWidget *) gtk_tool_button_new_from_stock(GTK_STOCK_REFRESH);
	gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(wid), tooltips,
		_("Refresh"), NULL);
	g_signal_connect(G_OBJECT(wid), "clicked", G_CALLBACK(refresh), NULL);
	gtk_container_add(GTK_CONTAINER(toolbar), wid);

	wid = (GtkWidget *) gtk_tool_button_new_from_stock(GTK_STOCK_HOME);
	gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(wid), tooltips,
		_("Home"), NULL);
	g_signal_connect(G_OBJECT(wid), "clicked", G_CALLBACK(on_go_home), NULL);
	gtk_container_add(GTK_CONTAINER(toolbar), wid);

	wid = (GtkWidget *) gtk_tool_button_new_from_stock(GTK_STOCK_JUMP_TO);
	gtk_tool_item_set_tooltip(GTK_TOOL_ITEM(wid), tooltips,
		_("Set path from document"), NULL);
	g_signal_connect(G_OBJECT(wid), "clicked", G_CALLBACK(on_current_path), NULL);
	gtk_container_add(GTK_CONTAINER(toolbar), wid);

	gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);

	path_entry = gtk_entry_new();
	gtk_editable_set_editable(GTK_EDITABLE(path_entry), FALSE);
	gtk_box_pack_start(GTK_BOX(vbox), path_entry, FALSE, FALSE, 2);

	scrollwin = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_policy(
		GTK_SCROLLED_WINDOW(scrollwin),
		GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_container_add(GTK_CONTAINER(scrollwin), file_view);
	gtk_container_add(GTK_CONTAINER(vbox), scrollwin);

	gtk_widget_show_all(vbox);
	gtk_notebook_append_page(GTK_NOTEBOOK(data->app->treeview_notebook), vbox,
		gtk_label_new(_("Files")));
}


void cleanup()
{
	gtk_widget_destroy(file_view);
}