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gtk2/gtk/gtkpathbar.c
Matthias Clasen 24ef9df0f1 pathbar: Convert to GtkDragSource
2020-01-08 18:48:19 -05:00

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/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
/* gtkpathbar.c
* Copyright (C) 2004 Red Hat, Inc., Jonathan Blandford <jrb@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkpathbar.h"
#include <string.h>
#include "gtkbox.h"
#include "gtkcssnodeprivate.h"
#include "gtkdnd.h"
#include "gtkdragsource.h"
#include "gtkicontheme.h"
#include "gtkimage.h"
#include "gtkintl.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtksettings.h"
#include "gtktogglebutton.h"
#include "gtkwidgetpath.h"
#include "gtkwidgetprivate.h"
#include "gtkeventcontrollerscroll.h"
#include "gtkdragsource.h"
typedef struct
{
GtkFileSystem *file_system;
GFile *root_file;
GFile *home_file;
GFile *desktop_file;
/* List of running GCancellable. When we cancel one, we remove it from this list.
* The pathbar cancels all outstanding cancellables when it is disposed.
*
* In code that queues async I/O operations:
*
* - Obtain a cancellable from the async I/O APIs, and call add_cancellable().
*
* To cancel a cancellable:
*
* - Call cancel_cancellable().
*
* In async I/O callbacks:
*
* - Check right away if g_cancellable_is_cancelled(): if true, just
* g_object_unref() the cancellable and return early (also free your
* closure data if you have one).
*
* - If it was not cancelled, call cancellable_async_done(). This will
* unref the cancellable and unqueue it from the pathbar's outstanding
* cancellables. Do your normal work to process the async result and free
* your closure data if you have one.
*/
GList *cancellables;
GCancellable *get_info_cancellable;
GIcon *root_icon;
GIcon *home_icon;
GIcon *desktop_icon;
GList *button_list;
GList *first_scrolled_button;
GList *fake_root;
GtkWidget *up_slider_button;
GtkWidget *down_slider_button;
guint settings_signal_id;
gint16 slider_width;
} GtkPathBarPrivate;
enum {
PATH_CLICKED,
LAST_SIGNAL
};
typedef enum {
NORMAL_BUTTON,
ROOT_BUTTON,
HOME_BUTTON,
DESKTOP_BUTTON
} ButtonType;
#define BUTTON_DATA(x) ((ButtonData *)(x))
static guint path_bar_signals [LAST_SIGNAL] = { 0 };
typedef struct _ButtonData ButtonData;
struct _ButtonData
{
GtkWidget *button;
ButtonType type;
char *dir_name;
GFile *file;
GtkWidget *image;
GtkWidget *label;
GCancellable *cancellable;
guint ignore_changes : 1;
guint file_is_hidden : 1;
};
/* This macro is used to check if a button can be used as a fake root.
* All buttons in front of a fake root are automatically hidden when in a
* directory below a fake root and replaced with the "<" arrow button.
*/
#define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
G_DEFINE_TYPE_WITH_PRIVATE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER)
static void gtk_path_bar_finalize (GObject *object);
static void gtk_path_bar_dispose (GObject *object);
static void gtk_path_bar_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_path_bar_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline);
static void gtk_path_bar_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_path_bar_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_path_bar_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data);
static void gtk_path_bar_scroll_up (GtkPathBar *path_bar);
static void gtk_path_bar_scroll_down (GtkPathBar *path_bar);
static gboolean gtk_path_bar_slider_up_defocus (GtkWidget *widget,
GdkEventButton *event,
GtkPathBar *path_bar);
static gboolean gtk_path_bar_slider_down_defocus (GtkWidget *widget,
GdkEventButton *event,
GtkPathBar *path_bar);
static void gtk_path_bar_style_updated (GtkWidget *widget);
static void gtk_path_bar_root (GtkWidget *widget);
static void gtk_path_bar_unroot (GtkWidget *widget);
static void gtk_path_bar_check_icon_theme (GtkPathBar *path_bar);
static void gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
ButtonData *button_data,
gboolean current_dir);
static gboolean gtk_path_bar_scroll_controller_scroll (GtkEventControllerScroll *scroll,
gdouble dx,
gdouble dy,
GtkPathBar *path_bar);
static void
add_cancellable (GtkPathBar *path_bar,
GCancellable *cancellable)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
g_assert (g_list_find (priv->cancellables, cancellable) == NULL);
priv->cancellables = g_list_prepend (priv->cancellables, cancellable);
}
static void
drop_node_for_cancellable (GtkPathBar *path_bar,
GCancellable *cancellable)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *node;
node = g_list_find (priv->cancellables, cancellable);
g_assert (node != NULL);
node->data = NULL;
priv->cancellables = g_list_delete_link (priv->cancellables, node);
}
static void
cancel_cancellable (GtkPathBar *path_bar,
GCancellable *cancellable)
{
drop_node_for_cancellable (path_bar, cancellable);
g_cancellable_cancel (cancellable);
}
static void
cancellable_async_done (GtkPathBar *path_bar,
GCancellable *cancellable)
{
drop_node_for_cancellable (path_bar, cancellable);
g_object_unref (cancellable);
}
static void
cancel_all_cancellables (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
while (priv->cancellables)
{
GCancellable *cancellable = priv->cancellables->data;
cancel_cancellable (path_bar, cancellable);
}
}
static void
gtk_path_bar_init (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GtkStyleContext *context;
GtkEventController *controller;
priv = gtk_path_bar_get_instance_private (path_bar);
gtk_widget_init_template (GTK_WIDGET (path_bar));
/* Add the children manually because GtkPathBar derives from an abstract class,
* Glade cannot edit a <template> in gtkpathbar.ui if it's only a GtkContainer.
*/
gtk_container_add (GTK_CONTAINER (path_bar), priv->up_slider_button);
gtk_container_add (GTK_CONTAINER (path_bar), priv->down_slider_button);
/* GtkBuilder wont let us connect 'swapped' without specifying the signal's
* user data in the .ui file
*/
g_signal_connect_swapped (priv->up_slider_button, "clicked",
G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
g_signal_connect_swapped (priv->down_slider_button, "clicked",
G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
context = gtk_widget_get_style_context (GTK_WIDGET (path_bar));
gtk_style_context_add_class (context, "path-bar");
gtk_style_context_add_class (context, GTK_STYLE_CLASS_LINKED);
priv->get_info_cancellable = NULL;
priv->cancellables = NULL;
controller = gtk_event_controller_scroll_new (GTK_EVENT_CONTROLLER_SCROLL_VERTICAL |
GTK_EVENT_CONTROLLER_SCROLL_DISCRETE);
g_signal_connect (controller, "scroll",
G_CALLBACK (gtk_path_bar_scroll_controller_scroll),
path_bar);
gtk_widget_add_controller (GTK_WIDGET (path_bar), controller);
}
static void
gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass *) path_bar_class;
widget_class = (GtkWidgetClass *) path_bar_class;
container_class = (GtkContainerClass *) path_bar_class;
gobject_class->finalize = gtk_path_bar_finalize;
gobject_class->dispose = gtk_path_bar_dispose;
widget_class->measure = gtk_path_bar_measure;
widget_class->size_allocate = gtk_path_bar_size_allocate;
widget_class->style_updated = gtk_path_bar_style_updated;
widget_class->root = gtk_path_bar_root;
widget_class->unroot = gtk_path_bar_unroot;
container_class->add = gtk_path_bar_add;
container_class->forall = gtk_path_bar_forall;
container_class->remove = gtk_path_bar_remove;
/* FIXME: */
/* container_class->child_type = gtk_path_bar_child_type;*/
path_bar_signals [PATH_CLICKED] =
g_signal_new (I_("path-clicked"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
NULL, NULL,
_gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
G_TYPE_NONE, 3,
G_TYPE_POINTER,
G_TYPE_POINTER,
G_TYPE_BOOLEAN);
/* Bind class to template
*/
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/libgtk/ui/gtkpathbar.ui");
gtk_widget_class_bind_template_child_private (widget_class, GtkPathBar, up_slider_button);
gtk_widget_class_bind_template_child_private (widget_class, GtkPathBar, down_slider_button);
gtk_widget_class_bind_template_callback (widget_class, gtk_path_bar_slider_up_defocus);
gtk_widget_class_bind_template_callback (widget_class, gtk_path_bar_slider_down_defocus);
gtk_widget_class_bind_template_callback (widget_class, gtk_path_bar_scroll_up);
gtk_widget_class_bind_template_callback (widget_class, gtk_path_bar_scroll_down);
}
static void
gtk_path_bar_finalize (GObject *object)
{
GtkPathBar *path_bar = GTK_PATH_BAR (object);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
cancel_all_cancellables (path_bar);
g_list_free (priv->button_list);
g_clear_object (&priv->root_file);
g_clear_object (&priv->home_file);
g_clear_object (&priv->desktop_file);
g_clear_object (&priv->root_icon);
g_clear_object (&priv->home_icon);
g_clear_object (&priv->desktop_icon);
g_clear_object (&priv->file_system);
G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
}
/* Removes the settings signal handler. It's safe to call multiple times */
static void
remove_settings_signal (GtkPathBar *path_bar,
GdkDisplay *display)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
if (priv->settings_signal_id)
{
GtkSettings *settings;
settings = gtk_settings_get_for_display (display);
g_signal_handler_disconnect (settings,
priv->settings_signal_id);
priv->settings_signal_id = 0;
}
}
static void
gtk_path_bar_dispose (GObject *object)
{
GtkPathBar *path_bar = GTK_PATH_BAR (object);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
remove_settings_signal (path_bar, gtk_widget_get_display (GTK_WIDGET (object)));
priv->get_info_cancellable = NULL;
cancel_all_cancellables (path_bar);
G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
}
/* Size requisition:
*
* Ideally, our size is determined by another widget, and we are just filling
* available space.
*/
static void
gtk_path_bar_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkPathBar *path_bar = GTK_PATH_BAR (widget);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
ButtonData *button_data;
GList *list;
int child_size;
int size = 0;
int child_min, child_nat;
*minimum = 0;
*natural = 0;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
for (list = priv->button_list; list; list = list->next)
{
button_data = BUTTON_DATA (list->data);
gtk_widget_measure (button_data->button, GTK_ORIENTATION_HORIZONTAL, -1,
&child_min, &child_nat, NULL, NULL);
gtk_widget_measure (button_data->button, GTK_ORIENTATION_VERTICAL, -1,
&child_size, NULL, NULL, NULL);
size = MAX (size, child_size);
if (button_data->type == NORMAL_BUTTON)
{
/* Use 2*Height as button width because of ellipsized label. */
child_min = MAX (child_min, child_size * 2);
child_nat = MAX (child_min, child_size * 2);
}
*minimum = MAX (*minimum, child_min);
*natural = *natural + child_nat;
}
/* Add space for slider, if we have more than one path */
/* Theoretically, the slider could be bigger than the other button. But we're
* not going to worry about that now.
*/
priv->slider_width = 0;
gtk_widget_measure (priv->up_slider_button, GTK_ORIENTATION_HORIZONTAL, -1,
&child_min, &child_nat, NULL, NULL);
if (priv->button_list && priv->button_list->next != NULL)
{
*minimum += child_min;
*natural += child_nat;
}
priv->slider_width = MAX (priv->slider_width, child_min);
gtk_widget_measure (priv->down_slider_button, GTK_ORIENTATION_HORIZONTAL, -1,
&child_min, &child_nat, NULL, NULL);
if (priv->button_list && priv->button_list->next != NULL)
{
*minimum += child_min;
*natural += child_nat;
}
priv->slider_width = MAX (priv->slider_width, child_min);
}
else /* VERTICAL */
{
for (list = priv->button_list; list; list = list->next)
{
button_data = BUTTON_DATA (list->data);
gtk_widget_measure (button_data->button, GTK_ORIENTATION_VERTICAL, -1,
&child_min, &child_nat, NULL, NULL);
*minimum = MAX (*minimum, child_min);
*natural = MAX (*natural, child_nat);
}
gtk_widget_measure (priv->up_slider_button, GTK_ORIENTATION_VERTICAL, -1,
&child_min, &child_nat, NULL, NULL);
*minimum = MAX (*minimum, child_min);
*natural = MAX (*natural, child_nat);
gtk_widget_measure (priv->up_slider_button, GTK_ORIENTATION_VERTICAL, -1,
&child_min, &child_nat, NULL, NULL);
*minimum = MAX (*minimum, child_min);
*natural = MAX (*natural, child_nat);
}
}
static void
gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
if (priv->button_list)
{
GtkWidget *button;
button = BUTTON_DATA (priv->button_list->data)->button;
if (gtk_widget_get_child_visible (button))
gtk_widget_set_sensitive (priv->down_slider_button, FALSE);
else
gtk_widget_set_sensitive (priv->down_slider_button, TRUE);
button = BUTTON_DATA (g_list_last (priv->button_list)->data)->button;
if (gtk_widget_get_child_visible (button))
gtk_widget_set_sensitive (priv->up_slider_button, FALSE);
else
gtk_widget_set_sensitive (priv->up_slider_button, TRUE);
}
}
/* This is a tad complicated
*/
static void
gtk_path_bar_size_allocate (GtkWidget *widget,
int widget_width,
int widget_height,
int baseline)
{
GtkPathBar *path_bar = GTK_PATH_BAR (widget);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GtkWidget *child;
GtkTextDirection direction;
GtkAllocation child_allocation;
GList *list, *first_button;
gint width;
gint allocation_width;
gboolean need_sliders = TRUE;
gint up_slider_offset = 0;
gint down_slider_offset = 0;
GtkRequisition child_requisition;
/* No path is set; we don't have to allocate anything. */
if (priv->button_list == NULL)
return;
direction = gtk_widget_get_direction (widget);
allocation_width = widget_width;
/* First, we check to see if we need the scrollbars. */
if (priv->fake_root)
width = priv->slider_width;
else
width = 0;
for (list = priv->button_list; list; list = list->next)
{
child = BUTTON_DATA (list->data)->button;
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
width += child_requisition.width;
if (list == priv->fake_root)
break;
}
if (width <= allocation_width)
{
if (priv->fake_root)
first_button = priv->fake_root;
else
first_button = g_list_last (priv->button_list);
}
else
{
gboolean reached_end = FALSE;
gint slider_space = 2 * priv->slider_width;
if (priv->first_scrolled_button)
first_button = priv->first_scrolled_button;
else
first_button = priv->button_list;
need_sliders = TRUE;
/* To see how much space we have, and how many buttons we can display.
* We start at the first button, count forward until hit the new
* button, then count backwards.
*/
/* Count down the path chain towards the end. */
gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
&child_requisition, NULL);
width = child_requisition.width;
list = first_button->prev;
while (list && !reached_end)
{
child = BUTTON_DATA (list->data)->button;
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
if (width + child_requisition.width + slider_space > allocation_width)
reached_end = TRUE;
else if (list == priv->fake_root)
break;
else
width += child_requisition.width;
list = list->prev;
}
/* Finally, we walk up, seeing how many of the previous buttons we can
* add */
while (first_button->next && !reached_end)
{
child = BUTTON_DATA (first_button->next->data)->button;
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
if (width + child_requisition.width + slider_space > allocation_width)
{
reached_end = TRUE;
}
else
{
width += child_requisition.width;
if (first_button == priv->fake_root)
break;
first_button = first_button->next;
}
}
}
/* Now, we allocate space to the buttons */
child_allocation.y = 0;
child_allocation.height = widget_height;
if (direction == GTK_TEXT_DIR_RTL)
{
child_allocation.x = widget_width;
if (need_sliders || priv->fake_root)
{
child_allocation.x -= priv->slider_width;
up_slider_offset = widget_width - priv->slider_width;
}
}
else
{
child_allocation.x = 0;
if (need_sliders || priv->fake_root)
{
up_slider_offset = 0;
child_allocation.x += priv->slider_width;
}
}
for (list = first_button; list; list = list->prev)
{
GtkAllocation widget_allocation;
ButtonData *button_data;
button_data = BUTTON_DATA (list->data);
child = button_data->button;
gtk_widget_get_preferred_size (child, &child_requisition, NULL);
child_allocation.width = MIN (child_requisition.width,
allocation_width - 2 * priv->slider_width);
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x -= child_allocation.width;
/* Check to see if we've don't have any more space to allocate buttons */
if (need_sliders && direction == GTK_TEXT_DIR_RTL)
{
gtk_widget_get_allocation (widget, &widget_allocation);
if (child_allocation.x - priv->slider_width < widget_allocation.x)
break;
}
else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
{
gtk_widget_get_allocation (widget, &widget_allocation);
if (child_allocation.x + child_allocation.width + priv->slider_width >
widget_allocation.x + allocation_width)
break;
}
if (child_allocation.width < child_requisition.width)
{
if (!gtk_widget_get_has_tooltip (child))
gtk_widget_set_tooltip_text (child, button_data->dir_name);
}
else if (gtk_widget_get_has_tooltip (child))
gtk_widget_set_tooltip_text (child, NULL);
gtk_widget_set_child_visible (child, TRUE);
gtk_widget_size_allocate (child, &child_allocation, baseline);
if (direction == GTK_TEXT_DIR_RTL)
{
down_slider_offset = child_allocation.x - priv->slider_width;
}
else
{
down_slider_offset += child_allocation.width;
child_allocation.x += child_allocation.width;
}
}
/* Now we go hide all the widgets that don't fit */
while (list)
{
child = BUTTON_DATA (list->data)->button;
gtk_widget_set_child_visible (child, FALSE);
list = list->prev;
}
for (list = first_button->next; list; list = list->next)
{
child = BUTTON_DATA (list->data)->button;
gtk_widget_set_child_visible (child, FALSE);
}
if (need_sliders || priv->fake_root)
{
child_allocation.width = priv->slider_width;
child_allocation.x = up_slider_offset;
gtk_widget_size_allocate (priv->up_slider_button,
&child_allocation,
-1);
gtk_widget_set_child_visible (priv->up_slider_button, TRUE);
gtk_widget_show (priv->up_slider_button);
if (direction == GTK_TEXT_DIR_LTR)
down_slider_offset += priv->slider_width;
}
else
{
gtk_widget_set_child_visible (priv->up_slider_button, FALSE);
}
if (need_sliders)
{
child_allocation.width = priv->slider_width;
child_allocation.x = down_slider_offset;
gtk_widget_size_allocate (priv->down_slider_button,
&child_allocation,
-1);
gtk_widget_set_child_visible (priv->down_slider_button, TRUE);
gtk_widget_show (priv->down_slider_button);
gtk_path_bar_update_slider_buttons (path_bar);
}
else
{
gtk_widget_set_child_visible (priv->down_slider_button, FALSE);
}
}
static void
gtk_path_bar_style_updated (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget);
gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
}
static void
gtk_path_bar_root (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->root (widget);
gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
}
static void
gtk_path_bar_unroot (GtkWidget *widget)
{
remove_settings_signal (GTK_PATH_BAR (widget), gtk_widget_get_display (widget));
GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unroot (widget);
}
static gboolean
gtk_path_bar_scroll_controller_scroll (GtkEventControllerScroll *scroll,
gdouble dx,
gdouble dy,
GtkPathBar *path_bar)
{
if (dy > 0)
gtk_path_bar_scroll_down (path_bar);
else if (dy < 0)
gtk_path_bar_scroll_up (path_bar);
return GDK_EVENT_STOP;
}
static void
gtk_path_bar_add (GtkContainer *container,
GtkWidget *widget)
{
gtk_widget_set_parent (widget, GTK_WIDGET (container));
}
static void
gtk_path_bar_remove_1 (GtkContainer *container,
GtkWidget *widget)
{
gboolean was_visible = gtk_widget_get_visible (widget);
gtk_widget_unparent (widget);
if (was_visible)
gtk_widget_queue_resize (GTK_WIDGET (container));
}
static void
gtk_path_bar_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkPathBar *path_bar = GTK_PATH_BAR (container);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *children;
if (widget == priv->up_slider_button)
{
gtk_path_bar_remove_1 (container, widget);
priv->up_slider_button = NULL;
return;
}
if (widget == priv->down_slider_button)
{
gtk_path_bar_remove_1 (container, widget);
priv->down_slider_button = NULL;
return;
}
children = priv->button_list;
while (children)
{
if (widget == BUTTON_DATA (children->data)->button)
{
gtk_path_bar_remove_1 (container, widget);
priv->button_list = g_list_remove_link (priv->button_list, children);
g_list_free (children);
return;
}
children = children->next;
}
}
static void
gtk_path_bar_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkPathBar *path_bar = GTK_PATH_BAR (container);
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *children;
g_return_if_fail (callback != NULL);
children = priv->button_list;
while (children)
{
GtkWidget *child;
child = BUTTON_DATA (children->data)->button;
children = children->next;
(* callback) (child, callback_data);
}
if (priv->up_slider_button)
(* callback) (priv->up_slider_button, callback_data);
if (priv->down_slider_button)
(* callback) (priv->down_slider_button, callback_data);
}
static void
gtk_path_bar_scroll_down (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GtkAllocation allocation, button_allocation;
GList *list;
GList *down_button = NULL;
gint space_available;
if (gtk_widget_get_child_visible (BUTTON_DATA (priv->button_list->data)->button))
{
/* Return if the last button is already visible */
return;
}
gtk_widget_queue_resize (GTK_WIDGET (path_bar));
/* We find the button at the 'down' end that we have to make
* visible */
for (list = priv->button_list; list; list = list->next)
{
if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
{
down_button = list;
break;
}
}
gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
space_available = (allocation.width
- 2 * priv->slider_width
- button_allocation.width);
priv->first_scrolled_button = down_button;
/* We have space_available free space that's not being used.
* So we walk down from the end, adding buttons until we use all free space.
*/
while (space_available > 0)
{
priv->first_scrolled_button = down_button;
down_button = down_button->next;
if (!down_button)
break;
space_available -= button_allocation.width;
}
}
static void
gtk_path_bar_scroll_up (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *list;
list = g_list_last (priv->button_list);
if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
{
/* Return if the first button is already visible */
return;
}
gtk_widget_queue_resize (GTK_WIDGET (path_bar));
for ( ; list; list = list->prev)
{
if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
{
if (list->prev == priv->fake_root)
priv->fake_root = NULL;
priv->first_scrolled_button = list;
return;
}
}
}
static gboolean
gtk_path_bar_slider_up_defocus (GtkWidget *widget,
GdkEventButton *event,
GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *list;
GList *up_button = NULL;
if (gdk_event_get_event_type ((GdkEvent *) event) != GDK_FOCUS_CHANGE)
return FALSE;
for (list = g_list_last (priv->button_list); list; list = list->prev)
{
if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
{
up_button = list;
break;
}
}
/* don't let the focus vanish */
if ((!gtk_widget_is_sensitive (priv->up_slider_button)) ||
(!gtk_widget_get_child_visible (priv->up_slider_button)))
gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
return FALSE;
}
static gboolean
gtk_path_bar_slider_down_defocus (GtkWidget *widget,
GdkEventButton *event,
GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *list;
GList *down_button = NULL;
if (gdk_event_get_event_type ((GdkEvent *) event) != GDK_FOCUS_CHANGE)
return FALSE;
for (list = priv->button_list; list; list = list->next)
{
if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
{
down_button = list;
break;
}
}
/* don't let the focus vanish */
if ((!gtk_widget_is_sensitive (priv->down_slider_button)) ||
(!gtk_widget_get_child_visible (priv->down_slider_button)))
gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
return FALSE;
}
/* Changes the icons wherever it is needed */
static void
reload_icons (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *list;
g_clear_object (&priv->root_icon);
g_clear_object (&priv->home_icon);
g_clear_object (&priv->desktop_icon);
for (list = priv->button_list; list; list = list->next)
{
ButtonData *button_data;
gboolean current_dir;
button_data = BUTTON_DATA (list->data);
if (button_data->type != NORMAL_BUTTON)
{
current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
}
}
}
static void
change_icon_theme (GtkPathBar *path_bar)
{
reload_icons (path_bar);
}
/* Callback used when a GtkSettings value changes */
static void
settings_notify_cb (GObject *object,
GParamSpec *pspec,
GtkPathBar *path_bar)
{
const char *name;
name = g_param_spec_get_name (pspec);
if (strcmp (name, "gtk-icon-theme-name") == 0)
change_icon_theme (path_bar);
}
static void
gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
if (priv->settings_signal_id == 0)
{
GtkSettings *settings;
settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
priv->settings_signal_id = g_signal_connect (settings, "notify",
G_CALLBACK (settings_notify_cb), path_bar);
}
change_icon_theme (path_bar);
}
/* Public functions and their helpers */
static void
gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
while (priv->button_list != NULL)
{
gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (priv->button_list->data)->button);
}
priv->first_scrolled_button = NULL;
priv->fake_root = NULL;
}
static void
button_clicked_cb (GtkWidget *button,
gpointer data)
{
GtkPathBar *path_bar;
GtkPathBarPrivate *priv;
ButtonData *button_data;
GList *button_list;
gboolean child_is_hidden;
GFile *child_file;
button_data = BUTTON_DATA (data);
if (button_data->ignore_changes)
return;
path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
priv = gtk_path_bar_get_instance_private (path_bar);
button_list = g_list_find (priv->button_list, button_data);
g_assert (button_list != NULL);
g_signal_handlers_block_by_func (button,
G_CALLBACK (button_clicked_cb), data);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
g_signal_handlers_unblock_by_func (button,
G_CALLBACK (button_clicked_cb), data);
if (button_list->prev)
{
ButtonData *child_data;
child_data = BUTTON_DATA (button_list->prev->data);
child_file = child_data->file;
child_is_hidden = child_data->file_is_hidden;
}
else
{
child_file = NULL;
child_is_hidden = FALSE;
}
g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
button_data->file, child_file, child_is_hidden);
}
struct SetButtonImageData
{
GtkPathBar *path_bar;
ButtonData *button_data;
};
static void
set_button_image_get_info_cb (GCancellable *cancellable,
GFileInfo *info,
const GError *error,
gpointer user_data)
{
gboolean cancelled = g_cancellable_is_cancelled (cancellable);
GIcon *icon;
struct SetButtonImageData *data = user_data;
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (data->path_bar);
if (cancelled)
{
g_free (data);
g_object_unref (cancellable);
return;
}
g_assert (GTK_IS_PATH_BAR (data->path_bar));
g_assert (G_OBJECT (data->path_bar)->ref_count > 0);
g_assert (cancellable == data->button_data->cancellable);
cancellable_async_done (data->path_bar, cancellable);
data->button_data->cancellable = NULL;
if (error)
goto out;
icon = g_file_info_get_symbolic_icon (info);
gtk_image_set_from_gicon (GTK_IMAGE (data->button_data->image), icon);
switch (data->button_data->type)
{
case HOME_BUTTON:
g_set_object (&priv->home_icon, icon);
break;
case DESKTOP_BUTTON:
g_set_object (&priv->desktop_icon, icon);
break;
case NORMAL_BUTTON:
case ROOT_BUTTON:
default:
break;
};
out:
g_free (data);
}
static void
set_button_image (GtkPathBar *path_bar,
ButtonData *button_data)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GtkFileSystemVolume *volume;
struct SetButtonImageData *data;
switch (button_data->type)
{
case ROOT_BUTTON:
if (priv->root_icon != NULL)
{
gtk_image_set_from_gicon (GTK_IMAGE (button_data->image), priv->root_icon);
break;
}
volume = _gtk_file_system_get_volume_for_file (priv->file_system, priv->root_file);
if (volume == NULL)
return;
priv->root_icon = _gtk_file_system_volume_get_symbolic_icon (volume);
_gtk_file_system_volume_unref (volume);
gtk_image_set_from_gicon (GTK_IMAGE (button_data->image), priv->root_icon);
break;
case HOME_BUTTON:
if (priv->home_icon != NULL)
{
gtk_image_set_from_gicon (GTK_IMAGE (button_data->image), priv->home_icon);
break;
}
data = g_new0 (struct SetButtonImageData, 1);
data->path_bar = path_bar;
data->button_data = button_data;
if (button_data->cancellable)
{
cancel_cancellable (path_bar, button_data->cancellable);
}
button_data->cancellable =
_gtk_file_system_get_info (priv->file_system,
priv->home_file,
"standard::symbolic-icon",
set_button_image_get_info_cb,
data);
add_cancellable (path_bar, button_data->cancellable);
break;
case DESKTOP_BUTTON:
if (priv->desktop_icon != NULL)
{
gtk_image_set_from_gicon (GTK_IMAGE (button_data->image), priv->desktop_icon);
break;
}
data = g_new0 (struct SetButtonImageData, 1);
data->path_bar = path_bar;
data->button_data = button_data;
if (button_data->cancellable)
{
cancel_cancellable (path_bar, button_data->cancellable);
}
button_data->cancellable =
_gtk_file_system_get_info (priv->file_system,
priv->desktop_file,
"standard::symbolic-icon",
set_button_image_get_info_cb,
data);
add_cancellable (path_bar, button_data->cancellable);
break;
case NORMAL_BUTTON:
default:
break;
}
}
static void
button_data_free (ButtonData *button_data)
{
g_clear_object (&button_data->file);
g_free (button_data->dir_name);
g_free (button_data);
}
static const char *
get_dir_name (ButtonData *button_data)
{
return button_data->dir_name;
}
static void
gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
ButtonData *button_data,
gboolean current_dir)
{
const gchar *dir_name = get_dir_name (button_data);
GtkStyleContext *context;
context = gtk_widget_get_style_context (button_data->button);
gtk_style_context_remove_class (context, "text-button");
gtk_style_context_remove_class (context, "image-button");
if (button_data->label != NULL)
{
gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
if (button_data->image == NULL)
gtk_style_context_add_class (context, "text-button");
}
if (button_data->image != NULL)
{
set_button_image (path_bar, button_data);
if (button_data->label == NULL)
gtk_style_context_add_class (context, "image-button");
}
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
{
button_data->ignore_changes = TRUE;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
button_data->ignore_changes = FALSE;
}
}
static ButtonType
find_button_type (GtkPathBar *path_bar,
GFile *file)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
if (priv->root_file != NULL &&
g_file_equal (file, priv->root_file))
return ROOT_BUTTON;
if (priv->home_file != NULL &&
g_file_equal (file, priv->home_file))
return HOME_BUTTON;
if (priv->desktop_file != NULL &&
g_file_equal (file, priv->desktop_file))
return DESKTOP_BUTTON;
return NORMAL_BUTTON;
}
static ButtonData *
make_directory_button (GtkPathBar *path_bar,
const char *dir_name,
GFile *file,
gboolean current_dir,
gboolean file_is_hidden)
{
AtkObject *atk_obj;
GtkWidget *child = NULL;
ButtonData *button_data;
GValue value = G_VALUE_INIT;
GdkContentProvider *content;
GtkDragSource *source;
file_is_hidden = !! file_is_hidden;
/* Is it a special button? */
button_data = g_new0 (ButtonData, 1);
button_data->type = find_button_type (path_bar, file);
button_data->button = gtk_toggle_button_new ();
atk_obj = gtk_widget_get_accessible (button_data->button);
gtk_widget_set_focus_on_click (button_data->button, FALSE);
switch (button_data->type)
{
case ROOT_BUTTON:
button_data->image = gtk_image_new ();
child = button_data->image;
button_data->label = NULL;
atk_object_set_name (atk_obj, _("File System Root"));
break;
case HOME_BUTTON:
case DESKTOP_BUTTON:
button_data->image = gtk_image_new ();
button_data->label = gtk_label_new (NULL);
child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_container_add (GTK_CONTAINER (child), button_data->image);
gtk_container_add (GTK_CONTAINER (child), button_data->label);
break;
case NORMAL_BUTTON:
default:
button_data->label = gtk_label_new (NULL);
child = button_data->label;
button_data->image = NULL;
}
button_data->dir_name = g_strdup (dir_name);
button_data->file = g_object_ref (file);
button_data->file_is_hidden = file_is_hidden;
gtk_container_add (GTK_CONTAINER (button_data->button), child);
gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
g_signal_connect (button_data->button, "clicked",
G_CALLBACK (button_clicked_cb),
button_data);
g_object_weak_ref (G_OBJECT (button_data->button),
(GWeakNotify) button_data_free, button_data);
g_value_init (&value, G_TYPE_FILE);
g_value_set_object (&value, button_data->file);
content = gdk_content_provider_new_for_value (&value);
source = gtk_drag_source_new (content, GDK_ACTION_COPY);
gtk_drag_source_attach (source, button_data->button, GDK_BUTTON1_MASK);
g_object_unref (content);
g_value_unset (&value);
return button_data;
}
static gboolean
gtk_path_bar_check_parent_path (GtkPathBar *path_bar,
GFile *file)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *list;
GList *current_path = NULL;
gboolean need_new_fake_root = FALSE;
for (list = priv->button_list; list; list = list->next)
{
ButtonData *button_data;
button_data = list->data;
if (g_file_equal (file, button_data->file))
{
current_path = list;
break;
}
if (list == priv->fake_root)
need_new_fake_root = TRUE;
}
if (current_path)
{
if (need_new_fake_root)
{
priv->fake_root = NULL;
for (list = current_path; list; list = list->next)
{
ButtonData *button_data;
button_data = list->data;
if (BUTTON_IS_FAKE_ROOT (button_data))
{
priv->fake_root = list;
break;
}
}
}
for (list = priv->button_list; list; list = list->next)
{
gtk_path_bar_update_button_appearance (path_bar,
BUTTON_DATA (list->data),
(list == current_path) ? TRUE : FALSE);
}
if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
{
priv->first_scrolled_button = current_path;
gtk_widget_queue_resize (GTK_WIDGET (path_bar));
}
return TRUE;
}
return FALSE;
}
struct SetFileInfo
{
GFile *file;
GFile *parent_file;
GtkPathBar *path_bar;
GList *new_buttons;
GList *fake_root;
gboolean first_directory;
};
static void
gtk_path_bar_set_file_finish (struct SetFileInfo *info,
gboolean result)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (info->path_bar);
if (result)
{
GList *l;
GtkCssNode *prev;
gtk_path_bar_clear_buttons (info->path_bar);
priv->button_list = g_list_reverse (info->new_buttons);
priv->fake_root = info->fake_root;
prev = gtk_widget_get_css_node (priv->down_slider_button);
for (l = priv->button_list; l; l = l->next)
{
GtkWidget *button = BUTTON_DATA (l->data)->button;
GtkCssNode *node = gtk_widget_get_css_node (button);
gtk_css_node_insert_before (gtk_widget_get_css_node (GTK_WIDGET (info->path_bar)),
node,
prev);
gtk_container_add (GTK_CONTAINER (info->path_bar), button);
prev = node;
}
}
else
{
GList *l;
for (l = info->new_buttons; l; l = l->next)
{
ButtonData *button_data;
button_data = BUTTON_DATA (l->data);
gtk_widget_destroy (button_data->button);
}
g_list_free (info->new_buttons);
}
if (info->file)
g_object_unref (info->file);
if (info->parent_file)
g_object_unref (info->parent_file);
g_free (info);
}
static void
gtk_path_bar_get_info_callback (GCancellable *cancellable,
GFileInfo *info,
const GError *error,
gpointer data)
{
gboolean cancelled = g_cancellable_is_cancelled (cancellable);
struct SetFileInfo *file_info = data;
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (file_info->path_bar);
ButtonData *button_data;
const gchar *display_name;
gboolean is_hidden;
if (cancelled)
{
gtk_path_bar_set_file_finish (file_info, FALSE);
g_object_unref (cancellable);
return;
}
g_assert (GTK_IS_PATH_BAR (file_info->path_bar));
g_assert (G_OBJECT (file_info->path_bar)->ref_count > 0);
g_assert (cancellable == priv->get_info_cancellable);
cancellable_async_done (file_info->path_bar, cancellable);
priv->get_info_cancellable = NULL;
if (!info)
{
gtk_path_bar_set_file_finish (file_info, FALSE);
return;
}
display_name = g_file_info_get_display_name (info);
is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
button_data = make_directory_button (file_info->path_bar, display_name,
file_info->file,
file_info->first_directory, is_hidden);
g_clear_object (&file_info->file);
file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
if (BUTTON_IS_FAKE_ROOT (button_data))
file_info->fake_root = file_info->new_buttons;
/* We have assigned the info for the innermost button, i.e. the deepest directory.
* Now, go on to fetch the info for this directory's parent.
*/
file_info->file = file_info->parent_file;
file_info->first_directory = FALSE;
if (!file_info->file)
{
/* No parent? Okay, we are done. */
gtk_path_bar_set_file_finish (file_info, TRUE);
return;
}
file_info->parent_file = g_file_get_parent (file_info->file);
/* Recurse asynchronously */
priv->get_info_cancellable = _gtk_file_system_get_info (priv->file_system,
file_info->file,
"standard::display-name,"
"standard::is-hidden,"
"standard::is-backup",
gtk_path_bar_get_info_callback,
file_info);
add_cancellable (file_info->path_bar, priv->get_info_cancellable);
}
void
_gtk_path_bar_set_file (GtkPathBar *path_bar,
GFile *file,
gboolean keep_trail)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
struct SetFileInfo *info;
g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
g_return_if_fail (G_IS_FILE (file));
/* Check whether the new path is already present in the pathbar as buttons.
* This could be a parent directory or a previous selected subdirectory.
*/
if (keep_trail && gtk_path_bar_check_parent_path (path_bar, file))
return;
info = g_new0 (struct SetFileInfo, 1);
info->file = g_object_ref (file);
info->path_bar = path_bar;
info->first_directory = TRUE;
info->parent_file = g_file_get_parent (info->file);
if (priv->get_info_cancellable)
{
cancel_cancellable (path_bar, priv->get_info_cancellable);
}
priv->get_info_cancellable =
_gtk_file_system_get_info (priv->file_system,
info->file,
"standard::display-name,standard::is-hidden,standard::is-backup",
gtk_path_bar_get_info_callback,
info);
add_cancellable (path_bar, priv->get_info_cancellable);
}
/* FIXME: This should be a construct-only property */
void
_gtk_path_bar_set_file_system (GtkPathBar *path_bar,
GtkFileSystem *file_system)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
const char *home;
g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
g_assert (priv->file_system == NULL);
priv->file_system = g_object_ref (file_system);
home = g_get_home_dir ();
if (home != NULL)
{
const gchar *desktop;
priv->home_file = g_file_new_for_path (home);
/* FIXME: Need file system backend specific way of getting the
* Desktop path.
*/
desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
if (desktop != NULL)
priv->desktop_file = g_file_new_for_path (desktop);
else
priv->desktop_file = NULL;
}
else
{
priv->home_file = NULL;
priv->desktop_file = NULL;
}
priv->root_file = g_file_new_for_path ("/");
}
/**
* _gtk_path_bar_up:
* @path_bar: a #GtkPathBar
*
* If the selected button in the pathbar is not the furthest button “up” (in the
* root direction), act as if the user clicked on the next button up.
**/
void
_gtk_path_bar_up (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *l;
for (l = priv->button_list; l; l = l->next)
{
GtkWidget *button = BUTTON_DATA (l->data)->button;
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
if (l->next)
{
GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
button_clicked_cb (next_button, l->next->data);
}
break;
}
}
}
/**
* _gtk_path_bar_down:
* @path_bar: a #GtkPathBar
*
* If the selected button in the pathbar is not the furthest button “down” (in the
* leaf direction), act as if the user clicked on the next button down.
**/
void
_gtk_path_bar_down (GtkPathBar *path_bar)
{
GtkPathBarPrivate *priv = gtk_path_bar_get_instance_private (path_bar);
GList *l;
for (l = priv->button_list; l; l = l->next)
{
GtkWidget *button = BUTTON_DATA (l->data)->button;
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
if (l->prev)
{
GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
button_clicked_cb (prev_button, l->prev->data);
}
break;
}
}
}
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