/*
 * pluma-file-browser-view.c - Pluma plugin providing easy file access 
 * from the sidepanel
 *
 * Copyright (C) 2006 - Jesse van den Kieboom <jesse@icecrew.nl>
 *
 * 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include <string.h>
#include <gio/gio.h>
#include <pluma/pluma-plugin.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

#include "pluma-file-browser-store.h"
#include "pluma-file-bookmarks-store.h"
#include "pluma-file-browser-view.h"
#include "pluma-file-browser-marshal.h"
#include "pluma-file-browser-enum-types.h"

#define PLUMA_FILE_BROWSER_VIEW_GET_PRIVATE(object)( \
		G_TYPE_INSTANCE_GET_PRIVATE((object), \
		PLUMA_TYPE_FILE_BROWSER_VIEW, PlumaFileBrowserViewPrivate))

struct _PlumaFileBrowserViewPrivate 
{
	GtkTreeViewColumn *column;
	GtkCellRenderer *pixbuf_renderer;
	GtkCellRenderer *text_renderer;

	GtkTreeModel *model;
	GtkTreeRowReference *editable;

	GdkCursor *busy_cursor;

	/* CLick policy */
	PlumaFileBrowserViewClickPolicy click_policy;
	GtkTreePath *double_click_path[2]; /* Both clicks in a double click need to be on the same row */
	GtkTreePath *hover_path;
	GdkCursor *hand_cursor;
	gboolean ignore_release;
	gboolean selected_on_button_down;
	gint drag_button;
	gboolean drag_started;
	
	gboolean restore_expand_state;
	gboolean is_refresh;
	GHashTable * expand_state;
};

/* Properties */
enum
{
	PROP_0,
	
	PROP_CLICK_POLICY,
	PROP_RESTORE_EXPAND_STATE
};

/* Signals */
enum
{
	ERROR,
	FILE_ACTIVATED,
	DIRECTORY_ACTIVATED,
	BOOKMARK_ACTIVATED,
	NUM_SIGNALS
};

static guint signals[NUM_SIGNALS] = { 0 };

static const GtkTargetEntry drag_source_targets[] = {
	{ "text/uri-list", 0, 0 }
};

PLUMA_PLUGIN_DEFINE_TYPE (PlumaFileBrowserView, pluma_file_browser_view,
	                  GTK_TYPE_TREE_VIEW)

static void on_cell_edited 		(GtkCellRendererText 	* cell, 
				 	 gchar 			* path,
				 	 gchar 			* new_text,
				 	PlumaFileBrowserView 	* tree_view);

static void on_begin_refresh 		(PlumaFileBrowserStore 	* model, 
					 PlumaFileBrowserView 	* view);
static void on_end_refresh 		(PlumaFileBrowserStore 	* model, 
					 PlumaFileBrowserView 	* view);

static void on_unload			(PlumaFileBrowserStore 	* model, 
					 gchar const		* uri,
					 PlumaFileBrowserView 	* view);

static void on_row_inserted		(PlumaFileBrowserStore 	* model, 
					 GtkTreePath		* path,
					 GtkTreeIter		* iter,
					 PlumaFileBrowserView 	* view);
		 
static void
pluma_file_browser_view_finalize (GObject * object)
{
	PlumaFileBrowserView *obj = PLUMA_FILE_BROWSER_VIEW(object);
	
	if (obj->priv->hand_cursor)
#if GTK_CHECK_VERSION (3, 0, 0)
		g_object_unref (obj->priv->hand_cursor);
#else
		gdk_cursor_unref (obj->priv->hand_cursor);
#endif

	if (obj->priv->hover_path)
		gtk_tree_path_free (obj->priv->hover_path);

	if (obj->priv->expand_state)
	{
		g_hash_table_destroy (obj->priv->expand_state);
		obj->priv->expand_state = NULL;
	}

#if GTK_CHECK_VERSION (3, 0, 0)
	g_object_unref (obj->priv->busy_cursor);
#else
	gdk_cursor_unref (obj->priv->busy_cursor);
#endif

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

static void
add_expand_state (PlumaFileBrowserView * view,
		  gchar const * uri)
{
	GFile * file;
	
	if (!uri)
		return;

	file = g_file_new_for_uri (uri);
	
	if (view->priv->expand_state)
		g_hash_table_insert (view->priv->expand_state, file, file);
	else
		g_object_unref (file);
}

static void
remove_expand_state (PlumaFileBrowserView * view,
		     gchar const * uri)
{
	GFile * file;
	
	if (!uri)
		return;

	file = g_file_new_for_uri (uri);
	
	if (view->priv->expand_state)
		g_hash_table_remove (view->priv->expand_state, file);

	g_object_unref (file);
}

static void
row_expanded (GtkTreeView * tree_view,
	      GtkTreeIter * iter,
	      GtkTreePath * path)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (tree_view);
	gchar * uri;

	if (GTK_TREE_VIEW_CLASS (pluma_file_browser_view_parent_class)->row_expanded)
		GTK_TREE_VIEW_CLASS (pluma_file_browser_view_parent_class)->row_expanded (tree_view, iter, path);

	if (!PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
		return;

	if (view->priv->restore_expand_state)
	{
		gtk_tree_model_get (view->priv->model,
				    iter, 
				    PLUMA_FILE_BROWSER_STORE_COLUMN_URI,
				    &uri,
				    -1);

		add_expand_state (view, uri);
		g_free (uri);
	}

	_pluma_file_browser_store_iter_expanded (PLUMA_FILE_BROWSER_STORE (view->priv->model),
						 iter);
}

static void
row_collapsed (GtkTreeView * tree_view,
	       GtkTreeIter * iter,
	       GtkTreePath * path)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (tree_view);
	gchar * uri;

	if (GTK_TREE_VIEW_CLASS (pluma_file_browser_view_parent_class)->row_collapsed)
		GTK_TREE_VIEW_CLASS (pluma_file_browser_view_parent_class)->row_collapsed (tree_view, iter, path);

	if (!PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
		return;
	
	if (view->priv->restore_expand_state)
	{
		gtk_tree_model_get (view->priv->model, 
				    iter, 
				    PLUMA_FILE_BROWSER_STORE_COLUMN_URI,
				    &uri,
				    -1);

		remove_expand_state (view, uri);
		g_free (uri);
	}

	_pluma_file_browser_store_iter_collapsed (PLUMA_FILE_BROWSER_STORE (view->priv->model),
						  iter);
}

static gboolean
leave_notify_event (GtkWidget *widget,
		    GdkEventCrossing *event)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (widget);

	if (view->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE &&
	    view->priv->hover_path != NULL) {
		gtk_tree_path_free (view->priv->hover_path);
		view->priv->hover_path = NULL;
	}

	// Chainup
	return GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->leave_notify_event (widget, event);
}

static gboolean
enter_notify_event (GtkWidget *widget,
		    GdkEventCrossing *event)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (widget);

	if (view->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE) {
		if (view->priv->hover_path != NULL)
			gtk_tree_path_free (view->priv->hover_path);

		gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (widget),
					       event->x, event->y,
					       &view->priv->hover_path,
					       NULL, NULL, NULL);

		if (view->priv->hover_path != NULL)
			gdk_window_set_cursor (gtk_widget_get_window (widget),
					       view->priv->hand_cursor);
	}

	// Chainup
	return GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->enter_notify_event (widget, event);
}

static gboolean
motion_notify_event (GtkWidget * widget,
		     GdkEventMotion * event)
{
	GtkTreePath *old_hover_path;
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (widget);

	if (view->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE) {
		old_hover_path = view->priv->hover_path;
		gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (widget),
					       event->x, event->y,
					       &view->priv->hover_path,
					       NULL, NULL, NULL);

		if ((old_hover_path != NULL) != (view->priv->hover_path != NULL)) {
			if (view->priv->hover_path != NULL)
				gdk_window_set_cursor (gtk_widget_get_window (widget),
						       view->priv->hand_cursor);
			else
				gdk_window_set_cursor (gtk_widget_get_window (widget),
						       NULL);
		}

		if (old_hover_path != NULL)
			gtk_tree_path_free (old_hover_path);
	}
	
	// Chainup
	return GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->motion_notify_event (widget, event);
}

static void
set_click_policy_property (PlumaFileBrowserView            *obj,
			   PlumaFileBrowserViewClickPolicy  click_policy)
{
	GtkTreeIter iter;
	GdkDisplay *display;
	GdkWindow *win;

	obj->priv->click_policy = click_policy;

	if (click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE) {
		if (obj->priv->hand_cursor == NULL)
#if GTK_CHECK_VERSION (3, 16, 0)
			display = gtk_widget_get_display (GTK_WIDGET (obj));
			obj->priv->hand_cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
#else
			obj->priv->hand_cursor = gdk_cursor_new(GDK_HAND2);
#endif
	} else if (click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_DOUBLE) {
		if (obj->priv->hover_path != NULL) {
			if (gtk_tree_model_get_iter (GTK_TREE_MODEL (obj->priv->model),
						     &iter, obj->priv->hover_path))
				gtk_tree_model_row_changed (GTK_TREE_MODEL (obj->priv->model),
							    obj->priv->hover_path, &iter);

			gtk_tree_path_free (obj->priv->hover_path);
			obj->priv->hover_path = NULL;
		}

		if (gtk_widget_get_realized (GTK_WIDGET (obj))) {
			win = gtk_widget_get_window (GTK_WIDGET (obj));
			gdk_window_set_cursor (win, NULL);
			
			display = gtk_widget_get_display (GTK_WIDGET (obj));

			if (display != NULL)
				gdk_display_flush (display);
		}

		if (obj->priv->hand_cursor) {
#if GTK_CHECK_VERSION (3, 0, 0)
			g_object_unref (obj->priv->hand_cursor);
#else
			gdk_cursor_unref (obj->priv->hand_cursor);
#endif
			obj->priv->hand_cursor = NULL;
		}
	}
}

static void
directory_activated (PlumaFileBrowserView *view, 
		     GtkTreeIter          *iter)
{
	pluma_file_browser_store_set_virtual_root (PLUMA_FILE_BROWSER_STORE (view->priv->model), iter);
}

static void
activate_selected_files (PlumaFileBrowserView *view) {
	GtkTreeView *tree_view = GTK_TREE_VIEW (view);
	GtkTreeSelection *selection = gtk_tree_view_get_selection (tree_view);
	GList *rows, *row;
	GtkTreePath *directory = NULL;
	GtkTreePath *path;
	GtkTreeIter iter;
	PlumaFileBrowserStoreFlag flags;

	rows = gtk_tree_selection_get_selected_rows (selection, &view->priv->model);
	
	for (row = rows; row; row = row->next) {
		path = (GtkTreePath *)(row->data);
		
		/* Get iter from path */
		if (!gtk_tree_model_get_iter (view->priv->model, &iter, path))
			continue;
		
		gtk_tree_model_get (view->priv->model, &iter, PLUMA_FILE_BROWSER_STORE_COLUMN_FLAGS, &flags, -1);

		if (FILE_IS_DIR (flags)) {
			if (directory == NULL)
				directory = path;
	
		} else if (!FILE_IS_DUMMY (flags)) {
			g_signal_emit (view, signals[FILE_ACTIVATED], 0, &iter);
		}
	}
	
	if (directory != NULL) {
		if (gtk_tree_model_get_iter (view->priv->model, &iter, directory))
			g_signal_emit (view, signals[DIRECTORY_ACTIVATED], 0, &iter);
	}
			
	g_list_foreach (rows, (GFunc)gtk_tree_path_free, NULL);
	g_list_free (rows);
}

static void
activate_selected_bookmark (PlumaFileBrowserView *view) {
	GtkTreeView *tree_view = GTK_TREE_VIEW (view);
	GtkTreeSelection *selection = gtk_tree_view_get_selection (tree_view);
	GtkTreeIter iter;

	if (gtk_tree_selection_get_selected (selection, &view->priv->model, &iter))
		g_signal_emit (view, signals[BOOKMARK_ACTIVATED], 0, &iter);
}

static void
activate_selected_items (PlumaFileBrowserView *view)
{
	if (PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
		activate_selected_files (view);
	else if (PLUMA_IS_FILE_BOOKMARKS_STORE (view->priv->model))
		activate_selected_bookmark (view);
}

static void
toggle_hidden_filter (PlumaFileBrowserView *view)
{
	PlumaFileBrowserStoreFilterMode mode;

	if (PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
	{
		mode = pluma_file_browser_store_get_filter_mode
			(PLUMA_FILE_BROWSER_STORE (view->priv->model));
		mode ^=	PLUMA_FILE_BROWSER_STORE_FILTER_MODE_HIDE_HIDDEN;
		pluma_file_browser_store_set_filter_mode
			(PLUMA_FILE_BROWSER_STORE (view->priv->model), mode);
	}
}

static gboolean
button_event_modifies_selection (GdkEventButton *event)
{
	return (event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) != 0;
}

static void
drag_begin (GtkWidget      *widget,
	    GdkDragContext *context)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (widget);
	
	view->priv->drag_button = 0;
	view->priv->drag_started = TRUE;
	
	/* Chain up */
	GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->drag_begin (widget, context);
}

static void
did_not_drag (PlumaFileBrowserView *view,
	      GdkEventButton       *event)
{
	GtkTreeView *tree_view;
	GtkTreeSelection *selection;
	GtkTreePath *path;
	
	tree_view = GTK_TREE_VIEW (view);
	selection = gtk_tree_view_get_selection (tree_view);

	if (gtk_tree_view_get_path_at_pos (tree_view, event->x, event->y,
					   &path, NULL, NULL, NULL)) {
		if ((view->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE)
		    && !button_event_modifies_selection(event) 
		    && (event->button == 1 || event->button == 2)) {
		    	/* Activate all selected items, and leave them selected */
			activate_selected_items (view);
		} else if ((event->button == 1 || event->button == 2)
		    && ((event->state & GDK_CONTROL_MASK) != 0 ||
			(event->state & GDK_SHIFT_MASK) == 0)
		    && view->priv->selected_on_button_down) {
			if (!button_event_modifies_selection (event)) {
				gtk_tree_selection_unselect_all (selection);
				gtk_tree_selection_select_path (selection, path);
			} else {
				gtk_tree_selection_unselect_path (selection, path);
			}
		}

		gtk_tree_path_free (path);
	}
}

static gboolean
button_release_event (GtkWidget       *widget,
		      GdkEventButton *event)
{
	PlumaFileBrowserView *view = PLUMA_FILE_BROWSER_VIEW (widget);

	if (event->button == view->priv->drag_button) {
		view->priv->drag_button = 0;

		if (!view->priv->drag_started &&
		    !view->priv->ignore_release)
			did_not_drag (view, event);
	}
	
	/* Chain up */
	return GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->button_release_event (widget, event);		
}

static gboolean
button_press_event (GtkWidget      *widget,
		    GdkEventButton *event)
{
	int double_click_time;
	static int click_count = 0;
	static guint32 last_click_time = 0;
	PlumaFileBrowserView *view;
	GtkTreeView *tree_view;
	GtkTreeSelection *selection;
	GtkTreePath *path;
	int expander_size;
	int horizontal_separator;
	gboolean on_expander;
	gboolean call_parent;
	gboolean selected;
	GtkWidgetClass *widget_parent = GTK_WIDGET_CLASS(pluma_file_browser_view_parent_class);

	tree_view = GTK_TREE_VIEW (widget);
	view = PLUMA_FILE_BROWSER_VIEW (widget);
	selection = gtk_tree_view_get_selection (tree_view);

	/* Get double click time */
	g_object_get (G_OBJECT (gtk_widget_get_settings (widget)), 
		      "gtk-double-click-time", &double_click_time,
		      NULL);

	/* Determine click count */
	if (event->time - last_click_time < double_click_time)
		click_count++;
	else
		click_count = 0;
	
	last_click_time = event->time;

	/* Ignore double click if we are in single click mode */
	if (view->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE && 
	    click_count >= 2) {
		return TRUE;
	}

	view->priv->ignore_release = FALSE;
	call_parent = TRUE;

	if (gtk_tree_view_get_path_at_pos (tree_view, event->x, event->y,
					   &path, NULL, NULL, NULL)) {
		/* Keep track of path of last click so double clicks only happen
		 * on the same item */
		if ((event->button == 1 || event->button == 2)  && 
		    event->type == GDK_BUTTON_PRESS) {
			if (view->priv->double_click_path[1])
				gtk_tree_path_free (view->priv->double_click_path[1]);

			view->priv->double_click_path[1] = view->priv->double_click_path[0];
			view->priv->double_click_path[0] = gtk_tree_path_copy (path);
		}

		if (event->type == GDK_2BUTTON_PRESS) {
			if (view->priv->double_click_path[1] &&
			    gtk_tree_path_compare (view->priv->double_click_path[0], view->priv->double_click_path[1]) == 0)
				activate_selected_items (view);
			
			/* Chain up */
			widget_parent->button_press_event (widget, event);
		} else {
			/* We're going to filter out some situations where
			 * we can't let the default code run because all
			 * but one row would be would be deselected. We don't
			 * want that; we want the right click menu or single
			 * click to apply to everything that's currently selected. */
			selected = gtk_tree_selection_path_is_selected (selection, path);

			if (event->button == 3 && selected)
				call_parent = FALSE;

			if ((event->button == 1 || event->button == 2) &&
			    ((event->state & GDK_CONTROL_MASK) != 0 ||
			     (event->state & GDK_SHIFT_MASK) == 0)) {
				gtk_widget_style_get (widget,
						      "expander-size", &expander_size,
						      "horizontal-separator", &horizontal_separator,
						      NULL);
				on_expander = (event->x <= horizontal_separator / 2 +
					       gtk_tree_path_get_depth (path) * expander_size);

				view->priv->selected_on_button_down = selected;

				if (selected) {
					call_parent = on_expander || gtk_tree_selection_count_selected_rows (selection) == 1;
					view->priv->ignore_release = call_parent && view->priv->click_policy != PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE;
				} else if  ((event->state & GDK_CONTROL_MASK) != 0) {
					call_parent = FALSE;
					gtk_tree_selection_select_path (selection, path);
				} else {
					view->priv->ignore_release = on_expander;
				}
			}
			
			if (call_parent) {
				/* Chain up */
				widget_parent->button_press_event (widget, event);
			} else if (selected) {
				gtk_widget_grab_focus (widget);
			}
			
			if ((event->button == 1 || event->button == 2) &&
			    event->type == GDK_BUTTON_PRESS) {
				view->priv->drag_started = FALSE;
				view->priv->drag_button = event->button;
			}
		}

		gtk_tree_path_free (path);
	} else {
		if ((event->button == 1 || event->button == 2)  && 
		    event->type == GDK_BUTTON_PRESS) {
			if (view->priv->double_click_path[1])
				gtk_tree_path_free (view->priv->double_click_path[1]);

			view->priv->double_click_path[1] = view->priv->double_click_path[0];
			view->priv->double_click_path[0] = NULL;
		}

		gtk_tree_selection_unselect_all (selection);
		/* Chain up */
		widget_parent->button_press_event (widget, event);
	}

	/* We already chained up if nescessary, so just return TRUE */
	return TRUE;
}

static gboolean
key_press_event (GtkWidget   *widget,
		 GdkEventKey *event)
{
	PlumaFileBrowserView *view;
	guint modifiers;
	gboolean handled;

	view = PLUMA_FILE_BROWSER_VIEW (widget);
	handled = FALSE;

	modifiers = gtk_accelerator_get_default_mod_mask ();

	switch (event->keyval) {
	case GDK_KEY_space:
		if (event->state & GDK_CONTROL_MASK) {
			handled = FALSE;
			break;
		}
		if (!gtk_widget_has_focus (widget)) {
			handled = FALSE;
			break;
		}

		activate_selected_items (view);
		handled = TRUE;
		break;

	case GDK_KEY_Return:
	case GDK_KEY_KP_Enter:
		activate_selected_items (view);
		handled = TRUE;
		break;

	case GDK_KEY_h:
		if ((event->state & modifiers) == GDK_CONTROL_MASK) {
			toggle_hidden_filter (view);
			handled = TRUE;
			break;
		}

	default:
		handled = FALSE;
	}

	/* Chain up */
	if (!handled)
		return GTK_WIDGET_CLASS (pluma_file_browser_view_parent_class)->key_press_event (widget, event);
	
	return TRUE;
}

static void
fill_expand_state (PlumaFileBrowserView * view, GtkTreeIter * iter)
{
	GtkTreePath * path;
	GtkTreeIter child;
	gchar * uri;
	
	if (!gtk_tree_model_iter_has_child (view->priv->model, iter))
		return;
	
	path = gtk_tree_model_get_path (view->priv->model, iter);
	
	if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (view), path))
	{
		gtk_tree_model_get (view->priv->model, 
				    iter, 
				    PLUMA_FILE_BROWSER_STORE_COLUMN_URI, 
				    &uri, 
				    -1);

		add_expand_state (view, uri);
		g_free (uri);
	}
	
	if (gtk_tree_model_iter_children (view->priv->model, &child, iter))
	{
		do {
			fill_expand_state (view, &child);
		} while (gtk_tree_model_iter_next (view->priv->model, &child));
	}
	
	gtk_tree_path_free (path);
}

static void
uninstall_restore_signals (PlumaFileBrowserView * tree_view,
			   GtkTreeModel * model)
{
	g_signal_handlers_disconnect_by_func (model, 
					      on_begin_refresh, 
					      tree_view);
					      
	g_signal_handlers_disconnect_by_func (model, 
					      on_end_refresh, 
					      tree_view);
					      
	g_signal_handlers_disconnect_by_func (model, 
					      on_unload, 
					      tree_view);

	g_signal_handlers_disconnect_by_func (model, 
					      on_row_inserted, 
					      tree_view);
}

static void
install_restore_signals (PlumaFileBrowserView * tree_view,
			 GtkTreeModel * model)
{
	g_signal_connect (model, 
			  "begin-refresh",
			  G_CALLBACK (on_begin_refresh), 
			  tree_view);

	g_signal_connect (model, 
			  "end-refresh",
			  G_CALLBACK (on_end_refresh), 
			  tree_view);

	g_signal_connect (model, 
			  "unload",
			  G_CALLBACK (on_unload), 
			  tree_view);

	g_signal_connect_after (model, 
			  "row-inserted",
			  G_CALLBACK (on_row_inserted), 
			  tree_view);
}

static void
set_restore_expand_state (PlumaFileBrowserView * view,
			  gboolean state)
{
	if (state == view->priv->restore_expand_state)
		return;

	if (view->priv->expand_state)
	{
		g_hash_table_destroy (view->priv->expand_state);
		view->priv->expand_state = NULL;
	}

	if (state)
	{
		view->priv->expand_state = g_hash_table_new_full (g_file_hash,
								  (GEqualFunc)g_file_equal,
								  g_object_unref,
								  NULL);
		
		if (view->priv->model && PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
		{
			fill_expand_state (view, NULL);

			install_restore_signals (view, view->priv->model);
		}
	}
	else if (view->priv->model && PLUMA_IS_FILE_BROWSER_STORE (view->priv->model))
	{
		uninstall_restore_signals (view, view->priv->model);
	}

	view->priv->restore_expand_state = state;
}

static void
get_property (GObject    *object,
	      guint       prop_id,
	      GValue     *value,
	      GParamSpec *pspec)
{
	PlumaFileBrowserView *obj = PLUMA_FILE_BROWSER_VIEW (object);

	switch (prop_id)
	{
		case PROP_CLICK_POLICY:
			g_value_set_enum (value, obj->priv->click_policy);
			break;
		case PROP_RESTORE_EXPAND_STATE:
			g_value_set_boolean (value, obj->priv->restore_expand_state);
			break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
			break;
	}
}

static void
set_property (GObject      *object,
	      guint         prop_id,
	      const GValue *value,
	      GParamSpec   *pspec)
{
	PlumaFileBrowserView *obj = PLUMA_FILE_BROWSER_VIEW (object);

	switch (prop_id)
	{
		case PROP_CLICK_POLICY:
			set_click_policy_property (obj, g_value_get_enum (value));
			break;
		case PROP_RESTORE_EXPAND_STATE:
			set_restore_expand_state (obj, g_value_get_boolean (value));
			break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
			break;
	}
}

static void
pluma_file_browser_view_class_init (PlumaFileBrowserViewClass * klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	GtkTreeViewClass *tree_view_class = GTK_TREE_VIEW_CLASS (klass);
	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
	
	object_class->finalize = pluma_file_browser_view_finalize;
	object_class->get_property = get_property;
	object_class->set_property = set_property;
	
	/* Event handlers */
	widget_class->motion_notify_event = motion_notify_event;
	widget_class->enter_notify_event = enter_notify_event;
	widget_class->leave_notify_event = leave_notify_event;
	widget_class->button_press_event = button_press_event;
	widget_class->button_release_event = button_release_event;
	widget_class->drag_begin = drag_begin;
	widget_class->key_press_event = key_press_event;

	/* Tree view handlers */
	tree_view_class->row_expanded = row_expanded;
	tree_view_class->row_collapsed = row_collapsed;
	
	/* Default handlers */
	klass->directory_activated = directory_activated;

	g_object_class_install_property (object_class, PROP_CLICK_POLICY,
					 g_param_spec_enum ("click-policy",
					 		    "Click Policy",
					 		    "The click policy",
					 		     PLUMA_TYPE_FILE_BROWSER_VIEW_CLICK_POLICY,
					 		     PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_DOUBLE,
					 		     G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	g_object_class_install_property (object_class, PROP_RESTORE_EXPAND_STATE,
					 g_param_spec_boolean ("restore-expand-state",
					 		       "Restore Expand State",
					 		       "Restore expanded state of loaded directories",
					 		       FALSE,
					 		       G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	signals[ERROR] =
	    g_signal_new ("error",
			  G_OBJECT_CLASS_TYPE (object_class),
			  G_SIGNAL_RUN_LAST,
			  G_STRUCT_OFFSET (PlumaFileBrowserViewClass,
					   error), NULL, NULL,
			  pluma_file_browser_marshal_VOID__UINT_STRING,
			  G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_STRING);
	signals[FILE_ACTIVATED] =
	    g_signal_new ("file-activated",
			  G_OBJECT_CLASS_TYPE (object_class),
			  G_SIGNAL_RUN_LAST,
			  G_STRUCT_OFFSET (PlumaFileBrowserViewClass,
					   file_activated), NULL, NULL,
			  g_cclosure_marshal_VOID__BOXED,
			  G_TYPE_NONE, 1, GTK_TYPE_TREE_ITER);
	signals[DIRECTORY_ACTIVATED] =
	    g_signal_new ("directory-activated",
			  G_OBJECT_CLASS_TYPE (object_class),
			  G_SIGNAL_RUN_LAST,
			  G_STRUCT_OFFSET (PlumaFileBrowserViewClass,
					   directory_activated), NULL, NULL,
			  g_cclosure_marshal_VOID__BOXED,
			  G_TYPE_NONE, 1, GTK_TYPE_TREE_ITER);
	signals[BOOKMARK_ACTIVATED] =
	    g_signal_new ("bookmark-activated",
			  G_OBJECT_CLASS_TYPE (object_class),
			  G_SIGNAL_RUN_LAST,
			  G_STRUCT_OFFSET (PlumaFileBrowserViewClass,
					   bookmark_activated), NULL, NULL,
			  g_cclosure_marshal_VOID__BOXED,
			  G_TYPE_NONE, 1, GTK_TYPE_TREE_ITER);

	g_type_class_add_private (object_class,
				  sizeof (PlumaFileBrowserViewPrivate));
}

static void
cell_data_cb (GtkTreeViewColumn * tree_column, GtkCellRenderer * cell,
	      GtkTreeModel * tree_model, GtkTreeIter * iter,
	      PlumaFileBrowserView * obj)
{
	GtkTreePath *path;
	PangoUnderline underline = PANGO_UNDERLINE_NONE;
	gboolean editable = FALSE;

	path = gtk_tree_model_get_path (tree_model, iter);

	if (obj->priv->click_policy == PLUMA_FILE_BROWSER_VIEW_CLICK_POLICY_SINGLE) {
		if (obj->priv->hover_path != NULL && 
		    gtk_tree_path_compare (path, obj->priv->hover_path) == 0)
			underline = PANGO_UNDERLINE_SINGLE;	
	}

	if (PLUMA_IS_FILE_BROWSER_STORE (tree_model))
	{
		if (obj->priv->editable != NULL && 
		    gtk_tree_row_reference_valid (obj->priv->editable))
		{
			GtkTreePath *edpath = gtk_tree_row_reference_get_path (obj->priv->editable);
			
			editable = edpath && gtk_tree_path_compare (path, edpath) == 0;
		}
	}

	gtk_tree_path_free (path);
	g_object_set (cell, "editable", editable, "underline", underline, NULL);
}

static void
pluma_file_browser_view_init (PlumaFileBrowserView * obj)
{
#if GTK_CHECK_VERSION (3, 16, 0)
	GdkDisplay *display;
#endif
	obj->priv = PLUMA_FILE_BROWSER_VIEW_GET_PRIVATE (obj);

	obj->priv->column = gtk_tree_view_column_new ();

	obj->priv->pixbuf_renderer = gtk_cell_renderer_pixbuf_new ();
	gtk_tree_view_column_pack_start (obj->priv->column,
					 obj->priv->pixbuf_renderer,
					 FALSE);
	gtk_tree_view_column_add_attribute (obj->priv->column,
					    obj->priv->pixbuf_renderer,
					    "pixbuf",
					    PLUMA_FILE_BROWSER_STORE_COLUMN_ICON);

	obj->priv->text_renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_column_pack_start (obj->priv->column,
					 obj->priv->text_renderer, TRUE);
	gtk_tree_view_column_add_attribute (obj->priv->column,
					    obj->priv->text_renderer,
					    "text",
					    PLUMA_FILE_BROWSER_STORE_COLUMN_NAME);

	g_signal_connect (obj->priv->text_renderer, "edited",
			  G_CALLBACK (on_cell_edited), obj);

	gtk_tree_view_append_column (GTK_TREE_VIEW (obj),
				     obj->priv->column);
	gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (obj), FALSE);

	gtk_tree_view_enable_model_drag_source (GTK_TREE_VIEW (obj),
						GDK_BUTTON1_MASK,
						drag_source_targets,
						G_N_ELEMENTS (drag_source_targets),
						GDK_ACTION_COPY);

#if GTK_CHECK_VERSION (3, 16, 0)
	display = gtk_widget_get_display (GTK_WIDGET (obj));
	obj->priv->busy_cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
#else
	obj->priv->busy_cursor = gdk_cursor_new (GDK_WATCH);
#endif
}

static gboolean
bookmarks_separator_func (GtkTreeModel * model, GtkTreeIter * iter,
			  gpointer user_data)
{
	guint flags;

	gtk_tree_model_get (model, iter,
			    PLUMA_FILE_BOOKMARKS_STORE_COLUMN_FLAGS,
			    &flags, -1);

	return (flags & PLUMA_FILE_BOOKMARKS_STORE_IS_SEPARATOR);
}

/* Public */
GtkWidget *
pluma_file_browser_view_new (void)
{
	PlumaFileBrowserView *obj =
	    PLUMA_FILE_BROWSER_VIEW (g_object_new
				     (PLUMA_TYPE_FILE_BROWSER_VIEW, NULL));

	return GTK_WIDGET (obj);
}

void
pluma_file_browser_view_set_model (PlumaFileBrowserView * tree_view,
				   GtkTreeModel * model)
{
	GtkTreeSelection *selection;

	if (tree_view->priv->model == model)
		return;

	selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));

	if (PLUMA_IS_FILE_BOOKMARKS_STORE (model)) {
		gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);		
		gtk_tree_view_set_row_separator_func (GTK_TREE_VIEW
						      (tree_view),
						      bookmarks_separator_func,
						      NULL, NULL);
		gtk_tree_view_column_set_cell_data_func (tree_view->priv->
							 column,
							 tree_view->priv->
							 text_renderer,
							 (GtkTreeCellDataFunc)
							 cell_data_cb,
							 tree_view, NULL);
	} else {
		gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
		gtk_tree_view_set_row_separator_func (GTK_TREE_VIEW
						      (tree_view), NULL,
						      NULL, NULL);
		gtk_tree_view_column_set_cell_data_func (tree_view->priv->
							 column,
							 tree_view->priv->
							 text_renderer,
							 (GtkTreeCellDataFunc)
							 cell_data_cb,
							 tree_view, NULL);

		if (tree_view->priv->restore_expand_state)
			install_restore_signals (tree_view, model);
				  
	}

	if (tree_view->priv->hover_path != NULL) {
		gtk_tree_path_free (tree_view->priv->hover_path);
		tree_view->priv->hover_path = NULL;
	}

	if (PLUMA_IS_FILE_BROWSER_STORE (tree_view->priv->model)) {
		if (tree_view->priv->restore_expand_state)
			uninstall_restore_signals (tree_view, 
						   tree_view->priv->model);
	}

	tree_view->priv->model = model;
	gtk_tree_view_set_model (GTK_TREE_VIEW (tree_view), model);
}

void
pluma_file_browser_view_start_rename (PlumaFileBrowserView * tree_view,
				      GtkTreeIter * iter)
{
	guint flags;
	GtkTreeRowReference *rowref;
	GtkTreePath *path;

	g_return_if_fail (PLUMA_IS_FILE_BROWSER_VIEW (tree_view));
	g_return_if_fail (PLUMA_IS_FILE_BROWSER_STORE
			  (tree_view->priv->model));
	g_return_if_fail (iter != NULL);

	gtk_tree_model_get (tree_view->priv->model, iter,
			    PLUMA_FILE_BROWSER_STORE_COLUMN_FLAGS, &flags,
			    -1);

	if (!(FILE_IS_DIR (flags) || !FILE_IS_DUMMY (flags)))
		return;

	path = gtk_tree_model_get_path (tree_view->priv->model, iter);
	rowref = gtk_tree_row_reference_new (tree_view->priv->model, path);

	/* Start editing */
	gtk_widget_grab_focus (GTK_WIDGET (tree_view));
	
	if (gtk_tree_path_up (path))
		gtk_tree_view_expand_to_path (GTK_TREE_VIEW (tree_view),
					      path);
	
	gtk_tree_path_free (path);
	tree_view->priv->editable = rowref;

	gtk_tree_view_set_cursor (GTK_TREE_VIEW (tree_view),
				  gtk_tree_row_reference_get_path (tree_view->priv->editable),
				  tree_view->priv->column, TRUE);
	
	gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (tree_view),
				      gtk_tree_row_reference_get_path (tree_view->priv->editable),
				      tree_view->priv->column,
				      FALSE, 0.0, 0.0);
}

void
pluma_file_browser_view_set_click_policy (PlumaFileBrowserView *tree_view,
					  PlumaFileBrowserViewClickPolicy policy)
{
	g_return_if_fail (PLUMA_IS_FILE_BROWSER_VIEW (tree_view));
	
	set_click_policy_property (tree_view, policy);
	
	g_object_notify (G_OBJECT (tree_view), "click-policy");
}

void
pluma_file_browser_view_set_restore_expand_state (PlumaFileBrowserView * tree_view,
						  gboolean restore_expand_state)
{
	g_return_if_fail (PLUMA_IS_FILE_BROWSER_VIEW (tree_view));

	set_restore_expand_state (tree_view, restore_expand_state);
	g_object_notify (G_OBJECT (tree_view), "restore-expand-state");
}

/* Signal handlers */
static void
on_cell_edited (GtkCellRendererText * cell, gchar * path, gchar * new_text,
		PlumaFileBrowserView * tree_view)
{
	GtkTreePath * treepath;
	GtkTreeIter iter;
	gboolean ret;
	GError * error = NULL;
	
	gtk_tree_row_reference_free (tree_view->priv->editable);
	tree_view->priv->editable = NULL;

	if (new_text == NULL || *new_text == '\0')
		return;
		
	treepath = gtk_tree_path_new_from_string (path);
	ret = gtk_tree_model_get_iter (GTK_TREE_MODEL (tree_view->priv->model), &iter, treepath);
	gtk_tree_path_free (treepath);

	if (ret) {
		if (pluma_file_browser_store_rename (PLUMA_FILE_BROWSER_STORE (tree_view->priv->model),
		    &iter, new_text, &error)) {
			treepath = gtk_tree_model_get_path (GTK_TREE_MODEL (tree_view->priv->model), &iter);
			gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (tree_view),
						      treepath, NULL,
						      FALSE, 0.0, 0.0);
			gtk_tree_path_free (treepath);
		}
		else {
			if (error) {
				g_signal_emit (tree_view, signals[ERROR], 0,
					       error->code, error->message);
				g_error_free (error);
			}
		}
	}
}

static void 
on_begin_refresh (PlumaFileBrowserStore * model, 
		  PlumaFileBrowserView * view)
{
	/* Store the refresh state, so we can handle unloading of nodes while
	   refreshing properly */
	view->priv->is_refresh = TRUE;
}

static void 
on_end_refresh (PlumaFileBrowserStore * model, 
		PlumaFileBrowserView * view)
{
	/* Store the refresh state, so we can handle unloading of nodes while
	   refreshing properly */
	view->priv->is_refresh = FALSE;
}

static void
on_unload (PlumaFileBrowserStore * model, 
	   gchar const * uri,
	   PlumaFileBrowserView * view)
{
	/* Don't remove the expand state if we are refreshing */
	if (!view->priv->restore_expand_state || view->priv->is_refresh)
		return;
	
	remove_expand_state (view, uri);
}

static void
restore_expand_state (PlumaFileBrowserView * view,
		      PlumaFileBrowserStore * model,
		      GtkTreeIter * iter)
{
	gchar * uri;
	GFile * file;
	GtkTreePath * path;

	gtk_tree_model_get (GTK_TREE_MODEL (model), 
			    iter, 
			    PLUMA_FILE_BROWSER_STORE_COLUMN_URI, 
			    &uri, 
			    -1);

	if (!uri)
		return;

	file = g_file_new_for_uri (uri);
	path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), iter);

	if (g_hash_table_lookup (view->priv->expand_state, file))
	{
		gtk_tree_view_expand_row (GTK_TREE_VIEW (view),
					  path,
					  FALSE);
	}
	
	gtk_tree_path_free (path);

	g_object_unref (file);	
	g_free (uri);
}

static void 
on_row_inserted (PlumaFileBrowserStore * model, 
		 GtkTreePath * path,
		 GtkTreeIter * iter,
		 PlumaFileBrowserView * view)
{
	GtkTreeIter parent;
	GtkTreePath * copy;

	if (gtk_tree_model_iter_has_child (GTK_TREE_MODEL (model), iter))
		restore_expand_state (view, model, iter);

	copy = gtk_tree_path_copy (path);

	if (gtk_tree_path_up (copy) &&
	    (gtk_tree_path_get_depth (copy) != 0) &&
	    gtk_tree_model_get_iter (GTK_TREE_MODEL (model), &parent, copy))
	{
		restore_expand_state (view, model, &parent);
	}

	gtk_tree_path_free (copy);
}
				 
// ex:ts=8:noet:
