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/* See LICENSE file for copyright and license details. */
#include "common.h"
static char url_list_name[] = "text/uri-list";
static GtkTargetEntry url_list = {url_list_name, 0u, 0u};
static unsigned int active_drop_timer;
static GdkDragContext *active_drop_context;
static GtkWidget *active_drop_widget;
static GdkDragAction active_drop_action;
size_t
get_dropped_files(struct file **files_out, char **uris)
{
GError *error = NULL;
char **uri, *path;
struct file *dropped_files = NULL;
size_t i = 0u;
if (!uris)
goto out;
for (uri = uris; *uri; uri++)
i += 1u;
if (!i)
goto out;
dropped_files = ecalloc(i, sizeof(*dropped_files));
for (uri = uris, i = 0u; *uri; uri++) {
error = NULL; /* g_filename_from_uri requires this initialisation */
path = g_filename_from_uri(*uri, NULL, &error);
if (!path) {
weprintf("g_filename_from_uri: %s", error->message);
g_error_free(error);
continue;
}
dropped_files[i++].path = estrdup(path);
g_free(path);
/* the other fields are set in the next code block */
}
out:
*files_out = dropped_files;
return i;
}
static void
drop_files(GtkWidget *widget, GdkDragContext *context, int x, int y,
GtkSelectionData *data, unsigned int info, unsigned int time, void *user)
{
char **uris = NULL;
struct file *dropped_files;
size_t n;
int accepted = 1;
GdkModifierType modifiers;
GdkWindow *event_window;
(void) x;
(void) y;
(void) info;
(void) user;
if (active_drop_timer) {
g_source_remove(active_drop_timer);
active_drop_timer = 0;
}
if (gtk_drag_get_source_widget(context) == collection_view) {
if (widget == display_area)
navigate_collection_drag();
else
accepted = 0;
goto out;
}
if (gtk_drag_get_source_widget(context) == display_area) {
accepted = 0;
goto out;
}
event_window = gtk_widget_get_window(widget);
if (!event_window)
goto out;
if (!gdk_window_get_pointer(event_window, NULL, NULL, &modifiers))
goto out;
uris = gtk_selection_data_get_uris(data);
n = get_dropped_files(&dropped_files, uris);
if (!n)
goto out;
if ((modifiers & GDK_CONTROL_MASK) && nfiles) {
n = files_from_array(dropped_files, n);
add_images(dropped_files, n);
free(dropped_files);
} else {
set_images_from_array(dropped_files, n);
}
out:
gtk_drag_finish(context, accepted, 0, time);
if (uris)
g_strfreev(uris);
}
static int
poll_modifiers(void *user)
{
GdkModifierType modifiers;
GdkDragAction action = 0;
(void) user;
if (!GTK_WIDGET_REALIZED(active_drop_widget))
return 1;
gdk_window_get_pointer(active_drop_widget->window, NULL, NULL, &modifiers);
action = (modifiers & GDK_CONTROL_MASK) ? GDK_ACTION_COPY : GDK_ACTION_MOVE;
if (!(gdk_drag_context_get_actions(active_drop_context) & action))
action = 0;
if (action != active_drop_action) {
active_drop_action = action;
gdk_drag_status(active_drop_context, action, GDK_CURRENT_TIME);
}
return 1;
}
static int
drop_motion(GtkWidget *widget, GdkDragContext *context, int x, int y, unsigned int time, void *user)
{
GdkWindow *event_window = gtk_widget_get_window(widget);
GdkModifierType modifiers;
GdkDragAction action = 0;
(void) x;
(void) y;
(void) user;
if (!gtk_get_current_event_state(&modifiers))
if (!event_window || !gdk_window_get_pointer(event_window, NULL, NULL, &modifiers))
goto out;
if (gtk_drag_dest_find_target(widget, context, NULL) == GDK_NONE)
goto out;
action = (modifiers & GDK_CONTROL_MASK) ? GDK_ACTION_COPY : GDK_ACTION_MOVE;
if (!(gdk_drag_context_get_actions(context) & action))
action = 0;
out:
gdk_drag_status(context, action, time);
if (!active_drop_timer) {
active_drop_context = context;
active_drop_widget = widget;
active_drop_action = action;
active_drop_timer = g_timeout_add(50, &poll_modifiers, NULL);
}
return 1;
}
static void
drop_leave(GtkWidget *widget, GdkDragContext *context, unsigned int time, void *user)
{
(void) widget;
(void) context;
(void) time;
(void) user;
if (active_drop_timer) {
g_source_remove(active_drop_timer);
active_drop_timer = 0;
}
}
void
set_up_dropping(void)
{
gtk_drag_dest_set(window, GTK_DEST_DEFAULT_HIGHLIGHT | GTK_DEST_DEFAULT_DROP,
&url_list, 1u, GDK_ACTION_COPY | GDK_ACTION_MOVE);
g_signal_connect(window, "drag-motion", G_CALLBACK(&drop_motion), NULL);
g_signal_connect(window, "drag-leave", G_CALLBACK(&drop_leave), NULL);
g_signal_connect(window, "drag-data-received", G_CALLBACK(&drop_files), NULL);
}
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