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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 int dragging = 0;
static int drag_source_disabled = 0;
static int drag_x, drag_y;
static void
set_pan_cursor(GtkWidget *widget, int active)
{
GdkWindow *gdk_window = gtk_widget_get_window(widget);
GdkCursor *cursor;
if (!gdk_window)
return;
if (!active) {
gdk_window_set_cursor(gdk_window, NULL);
return;
}
cursor = gdk_cursor_new_from_name(gtk_widget_get_display(widget), "grabbing");
if (!cursor)
cursor = gdk_cursor_new(GDK_HAND1);
if (!cursor)
return;
gdk_window_set_cursor(gdk_window, cursor);
gdk_cursor_unref(cursor);
}
static void
set_file_drag_source(GtkWidget *widget)
{
gtk_drag_source_set(widget, GDK_BUTTON1_MASK, &url_list, 1u,
GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK | GDK_ACTION_ASK);
}
static int
button_pressed(GtkWidget *widget, GdkEventButton *event, void *user)
{
struct file *file;
(void) user;
switch (event->button) {
case 1u:
if (~event->state & GDK_CONTROL_MASK) {
file = get_file();
if (file && file->path)
return 0;
gtk_drag_source_unset(widget);
drag_source_disabled = 1;
return 0;
}
gtk_drag_source_unset(widget);
drag_source_disabled = 1;
/* fall through */
case 2u:
dragging = 1;
set_pan_cursor(widget, 1);
drag_x = (int)event->x_root;
drag_y = (int)event->y_root;
return 1;
case 8u:
previous_action(NULL, NULL);
return 1;
case 9u:
next_action(NULL, NULL);
return 1;
default:
return 0;
}
}
static int
button_released(GtkWidget *widget, GdkEventButton *event, void *user)
{
(void) event;
(void) user;
if (dragging)
set_pan_cursor(widget, 0);
dragging = 0;
if (drag_source_disabled) {
set_file_drag_source(widget);
drag_source_disabled = 0;
}
return 0;
}
static int
pointer_moved(GtkWidget *widget, GdkEventMotion *event, void *user)
{
int x, y;
(void) event;
(void) user;
if (dragging) {
gdk_display_get_pointer(gtk_widget_get_display(widget), NULL, &x, &y, NULL);
scroll_by(drag_x - x, drag_y - y);
drag_x = x;
drag_y = y;
}
return dragging;
}
void
set_image_drag_icon(GdkDragContext *context, struct image *image)
{
GdkPixbuf *icon, *icon2;
enum transformation orientation;
intmax_t height, width;
int w, h;
if (!image)
return;
orientation = image->embedded_transformation;
width = (intmax_t)image->width;
height = (intmax_t)image->height;
if (width > DRAG_ICON_SIZE || height > DRAG_ICON_SIZE) {
if (width >= height) {
height = height * DRAG_ICON_SIZE / width;
height = MAX(1, height);
width = DRAG_ICON_SIZE;
} else {
width = width * DRAG_ICON_SIZE / height;
width = MAX(1, width);
height = DRAG_ICON_SIZE;
}
}
w = (int)width;
h = (int)height;
if (image->raster && width == image->width && height == image->height) {
if (orientation && (icon = transform_raster(image->raster, orientation)))
goto set_icon;
gtk_drag_set_icon_pixbuf(context, image->raster, 0, 0);
} else if (image->vector && (icon = rasterise(image->vector, w, h))) {
goto set_icon;
} else if (image->raster && (icon = gdk_pixbuf_scale_simple(image->raster, w, h, GDK_INTERP_BILINEAR))) {
if (orientation && (icon2 = transform_raster(icon, orientation))) {
g_object_unref(icon);
icon = icon2;
}
set_icon:
gtk_drag_set_icon_pixbuf(context, icon, 0, 0);
g_object_unref(icon);
}
}
static void
drag_begin(GtkWidget *widget, GdkDragContext *context, void *user)
{
struct image image;
(void) widget;
(void) user;
if (get_original_image(&image))
set_image_drag_icon(context, &image);
}
static void
drag_data_get(GtkWidget *widget, GdkDragContext *context, GtkSelectionData *data,
unsigned int info, unsigned int time, void *user)
{
struct file *file = get_file();
GError *error = NULL;
char *uri;
(void) widget;
(void) context;
(void) info;
(void) time;
(void) user;
if (!file || !file->path)
return;
uri = g_filename_to_uri(file->path, NULL, &error);
if (!uri) {
weprintf("g_filename_to_uri: %s", error->message);
g_error_free(error);
return;
}
gtk_selection_data_set_uris(data, (char *[]){uri, NULL});
g_free(uri);
}
void
set_up_dragging(void)
{
set_file_drag_source(display_area);
g_signal_connect(display_area, "button-press-event", G_CALLBACK(&button_pressed), NULL);
g_signal_connect(display_area, "button-release-event", G_CALLBACK(&button_released), NULL);
g_signal_connect(display_area, "motion-notify-event", G_CALLBACK(&pointer_moved), NULL);
g_signal_connect(display_area, "drag-begin", G_CALLBACK(&drag_begin), NULL);
g_signal_connect(display_area, "drag-data-get", G_CALLBACK(&drag_data_get), NULL);
}
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