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648 lines
16 KiB
648 lines
16 KiB
/*
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* Copyright © 2010 Kristian Høgsberg
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <math.h>
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#include <sys/time.h>
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#include <cairo.h>
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#include <sys/epoll.h>
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#include <wayland-client.h>
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#include <wayland-cursor.h>
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#include "window.h"
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#include "../shared/cairo-util.h"
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struct dnd_drag;
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struct dnd {
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struct window *window;
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struct widget *widget;
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struct display *display;
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uint32_t key;
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struct item *items[16];
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int self_only;
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struct dnd_drag *current_drag;
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};
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struct dnd_drag {
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cairo_surface_t *translucent;
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cairo_surface_t *opaque;
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int hotspot_x, hotspot_y;
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struct dnd *dnd;
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struct input *input;
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uint32_t time;
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struct item *item;
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int x_offset, y_offset;
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int width, height;
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const char *mime_type;
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struct wl_surface *drag_surface;
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struct wl_data_source *data_source;
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};
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struct item {
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cairo_surface_t *surface;
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int seed;
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int x, y;
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};
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struct dnd_flower_message {
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int seed, x_offset, y_offset;
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};
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static const int item_width = 64;
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static const int item_height = 64;
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static const int item_padding = 16;
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static const char flower_mime_type[] = "application/x-wayland-dnd-flower";
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static const char text_mime_type[] = "text/plain;charset=utf-8";
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static struct item *
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item_create(struct display *display, int x, int y, int seed)
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{
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struct item *item;
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struct timeval tv;
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item = malloc(sizeof *item);
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if (item == NULL)
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return NULL;
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gettimeofday(&tv, NULL);
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item->seed = seed ? seed : tv.tv_usec;
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srandom(item->seed);
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const int petal_count = 3 + random() % 5;
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const double r1 = 20 + random() % 10;
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const double r2 = 5 + random() % 12;
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const double u = (10 + random() % 90) / 100.0;
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const double v = (random() % 90) / 100.0;
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cairo_t *cr;
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int i;
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double t, dt = 2 * M_PI / (petal_count * 2);
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double x1, y1, x2, y2, x3, y3;
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struct rectangle rect;
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rect.width = item_width;
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rect.height = item_height;
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item->surface =
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display_create_surface(display, NULL, &rect, SURFACE_SHM);
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item->x = x;
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item->y = y;
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cr = cairo_create(item->surface);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 0, 0, 0, 0);
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cairo_paint(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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cairo_translate(cr, item_width / 2, item_height / 2);
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t = random();
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cairo_move_to(cr, cos(t) * r1, sin(t) * r1);
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for (i = 0; i < petal_count; i++, t += dt * 2) {
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x1 = cos(t) * r1;
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y1 = sin(t) * r1;
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x2 = cos(t + dt) * r2;
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y2 = sin(t + dt) * r2;
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x3 = cos(t + 2 * dt) * r1;
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y3 = sin(t + 2 * dt) * r1;
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cairo_curve_to(cr,
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x1 - y1 * u, y1 + x1 * u,
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x2 + y2 * v, y2 - x2 * v,
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x2, y2);
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cairo_curve_to(cr,
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x2 - y2 * v, y2 + x2 * v,
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x3 + y3 * u, y3 - x3 * u,
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x3, y3);
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}
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cairo_close_path(cr);
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cairo_set_source_rgba(cr,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 100) / 99.0);
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cairo_fill_preserve(cr);
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cairo_set_line_width(cr, 1);
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cairo_set_source_rgba(cr,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 100) / 99.0);
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cairo_stroke(cr);
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cairo_destroy(cr);
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return item;
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}
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static void
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dnd_redraw_handler(struct widget *widget, void *data)
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{
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struct dnd *dnd = data;
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struct rectangle allocation;
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cairo_t *cr;
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cairo_surface_t *surface;
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unsigned int i;
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surface = window_get_surface(dnd->window);
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cr = cairo_create(surface);
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widget_get_allocation(dnd->widget, &allocation);
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cairo_rectangle(cr, allocation.x, allocation.y,
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allocation.width, allocation.height);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
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cairo_fill(cr);
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cairo_rectangle(cr, allocation.x, allocation.y,
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allocation.width, allocation.height);
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cairo_clip(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
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if (!dnd->items[i])
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continue;
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cairo_set_source_surface(cr, dnd->items[i]->surface,
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dnd->items[i]->x + allocation.x,
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dnd->items[i]->y + allocation.y);
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cairo_paint(cr);
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}
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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static void
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keyboard_focus_handler(struct window *window,
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struct input *device, void *data)
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{
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struct dnd *dnd = data;
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window_schedule_redraw(dnd->window);
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}
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static int
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dnd_add_item(struct dnd *dnd, struct item *item)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
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if (dnd->items[i] == 0) {
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dnd->items[i] = item;
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return i;
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}
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}
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return -1;
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}
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static struct item *
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dnd_get_item(struct dnd *dnd, int32_t x, int32_t y)
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{
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struct item *item;
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struct rectangle allocation;
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unsigned int i;
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widget_get_allocation(dnd->widget, &allocation);
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x -= allocation.x;
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y -= allocation.y;
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for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
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item = dnd->items[i];
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if (item &&
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item->x <= x && x < item->x + item_width &&
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item->y <= y && y < item->y + item_height)
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return item;
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}
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return NULL;
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}
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static void
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data_source_target(void *data,
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struct wl_data_source *source, const char *mime_type)
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{
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struct dnd_drag *dnd_drag = data;
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struct dnd *dnd = dnd_drag->dnd;
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cairo_surface_t *surface;
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struct wl_buffer *buffer;
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dnd_drag->mime_type = mime_type;
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if (mime_type)
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surface = dnd_drag->opaque;
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else
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surface = dnd_drag->translucent;
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buffer = display_get_buffer_for_surface(dnd->display, surface);
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wl_surface_attach(dnd_drag->drag_surface, buffer, 0, 0);
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wl_surface_damage(dnd_drag->drag_surface, 0, 0,
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dnd_drag->width, dnd_drag->height);
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wl_surface_commit(dnd_drag->drag_surface);
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}
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static void
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data_source_send(void *data, struct wl_data_source *source,
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const char *mime_type, int32_t fd)
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{
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struct dnd_flower_message dnd_flower_message;
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struct dnd_drag *dnd_drag = data;
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char buffer[128];
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int n;
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if (strcmp(mime_type, flower_mime_type) == 0) {
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dnd_flower_message.seed = dnd_drag->item->seed;
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dnd_flower_message.x_offset = dnd_drag->x_offset;
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dnd_flower_message.y_offset = dnd_drag->y_offset;
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if (write(fd, &dnd_flower_message,
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sizeof dnd_flower_message) < 0)
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abort();
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} else if (strcmp(mime_type, text_mime_type) == 0) {
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n = snprintf(buffer, sizeof buffer, "seed=%d x=%d y=%d\n",
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dnd_drag->item->seed,
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dnd_drag->x_offset,
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dnd_drag->y_offset);
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if (write(fd, buffer, n) < 0)
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abort();
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}
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close(fd);
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}
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static void
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data_source_cancelled(void *data, struct wl_data_source *source)
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{
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struct dnd_drag *dnd_drag = data;
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/* The 'cancelled' event means that the source is no longer in
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* use by the drag (or current selection). We need to clean
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* up the drag object created and the local state. */
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wl_data_source_destroy(dnd_drag->data_source);
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/* Destroy the item that has been dragged out */
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cairo_surface_destroy(dnd_drag->item->surface);
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free(dnd_drag->item);
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wl_surface_destroy(dnd_drag->drag_surface);
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cairo_surface_destroy(dnd_drag->translucent);
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cairo_surface_destroy(dnd_drag->opaque);
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free(dnd_drag);
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}
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static const struct wl_data_source_listener data_source_listener = {
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data_source_target,
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data_source_send,
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data_source_cancelled
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};
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static cairo_surface_t *
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create_drag_cursor(struct dnd_drag *dnd_drag,
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struct item *item, int32_t x, int32_t y, double opacity)
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{
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struct dnd *dnd = dnd_drag->dnd;
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cairo_surface_t *surface;
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struct wl_cursor_image *pointer;
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struct rectangle rectangle;
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cairo_pattern_t *pattern;
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cairo_t *cr;
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pointer = display_get_pointer_image(dnd->display, CURSOR_DRAGGING);
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if (!pointer) {
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fprintf(stderr, "WARNING: grabbing cursor image not found\n");
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pointer = display_get_pointer_image(dnd->display,
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CURSOR_LEFT_PTR);
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assert(pointer && "no cursor image found");
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}
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rectangle.width = item_width + 2 * pointer->width;
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rectangle.height = item_height + 2 * pointer->height;
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surface = display_create_surface(dnd->display, NULL, &rectangle,
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SURFACE_SHM);
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cr = cairo_create(surface);
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cairo_translate(cr, pointer->width, pointer->height);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 0, 0, 0, 0);
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cairo_paint(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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cairo_set_source_surface(cr, item->surface, 0, 0);
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pattern = cairo_pattern_create_rgba(0, 0, 0, opacity);
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cairo_mask(cr, pattern);
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cairo_pattern_destroy(pattern);
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/* FIXME: more cairo-gl brokeness */
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surface_flush_device(surface);
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cairo_destroy(cr);
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dnd_drag->hotspot_x = pointer->width + x - item->x;
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dnd_drag->hotspot_y = pointer->height + y - item->y;
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dnd_drag->width = rectangle.width;
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dnd_drag->height = rectangle.height;
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return surface;
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}
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static void
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dnd_button_handler(struct widget *widget,
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struct input *input, uint32_t time,
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uint32_t button, enum wl_pointer_button_state state,
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void *data)
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{
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struct dnd *dnd = data;
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int32_t x, y;
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struct item *item;
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struct rectangle allocation;
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struct dnd_drag *dnd_drag;
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struct display *display;
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struct wl_compositor *compositor;
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struct wl_buffer *buffer;
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unsigned int i;
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uint32_t serial;
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cairo_surface_t *icon;
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widget_get_allocation(dnd->widget, &allocation);
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input_get_position(input, &x, &y);
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item = dnd_get_item(dnd, x, y);
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x -= allocation.x;
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y -= allocation.y;
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if (item && state == WL_POINTER_BUTTON_STATE_PRESSED) {
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dnd_drag = xmalloc(sizeof *dnd_drag);
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dnd_drag->dnd = dnd;
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dnd_drag->input = input;
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dnd_drag->time = time;
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dnd_drag->item = item;
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dnd_drag->x_offset = x - item->x;
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dnd_drag->y_offset = y - item->y;
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for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
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if (item == dnd->items[i]){
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dnd->items[i] = 0;
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break;
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}
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}
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display = window_get_display(dnd->window);
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compositor = display_get_compositor(display);
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serial = display_get_serial(display);
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dnd_drag->drag_surface =
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wl_compositor_create_surface(compositor);
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input_ungrab(input);
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if (dnd->self_only) {
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dnd_drag->data_source = NULL;
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} else {
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dnd_drag->data_source =
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display_create_data_source(dnd->display);
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wl_data_source_add_listener(dnd_drag->data_source,
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&data_source_listener,
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dnd_drag);
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wl_data_source_offer(dnd_drag->data_source,
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flower_mime_type);
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wl_data_source_offer(dnd_drag->data_source,
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text_mime_type);
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}
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wl_data_device_start_drag(input_get_data_device(input),
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dnd_drag->data_source,
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window_get_wl_surface(dnd->window),
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dnd_drag->drag_surface,
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serial);
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input_set_pointer_image(input, CURSOR_DRAGGING);
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dnd_drag->opaque =
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create_drag_cursor(dnd_drag, item, x, y, 1);
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dnd_drag->translucent =
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create_drag_cursor(dnd_drag, item, x, y, 0.2);
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if (dnd->self_only)
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icon = dnd_drag->opaque;
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else
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icon = dnd_drag->translucent;
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buffer = display_get_buffer_for_surface(dnd->display, icon);
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wl_surface_attach(dnd_drag->drag_surface, buffer,
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-dnd_drag->hotspot_x, -dnd_drag->hotspot_y);
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wl_surface_damage(dnd_drag->drag_surface, 0, 0,
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dnd_drag->width, dnd_drag->height);
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wl_surface_commit(dnd_drag->drag_surface);
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dnd->current_drag = dnd_drag;
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window_schedule_redraw(dnd->window);
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}
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}
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static int
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lookup_cursor(struct dnd *dnd, int x, int y)
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{
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struct item *item;
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item = dnd_get_item(dnd, x, y);
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if (item)
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return CURSOR_HAND1;
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else
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return CURSOR_LEFT_PTR;
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}
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static int
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dnd_enter_handler(struct widget *widget,
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struct input *input, float x, float y, void *data)
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{
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struct dnd *dnd = data;
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dnd->current_drag = NULL;
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return lookup_cursor(dnd, x, y);
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}
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static int
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dnd_motion_handler(struct widget *widget,
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struct input *input, uint32_t time,
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float x, float y, void *data)
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{
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return lookup_cursor(data, x, y);
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}
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static void
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dnd_data_handler(struct window *window,
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struct input *input,
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float x, float y, const char **types, void *data)
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{
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struct dnd *dnd = data;
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int i, has_flower = 0;
|
|
|
|
if (!types)
|
|
return;
|
|
for (i = 0; types[i]; i++)
|
|
if (strcmp(types[i], flower_mime_type) == 0)
|
|
has_flower = 1;
|
|
|
|
if (dnd_get_item(dnd, x, y) || dnd->self_only || !has_flower) {
|
|
input_accept(input, NULL);
|
|
} else {
|
|
input_accept(input, flower_mime_type);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dnd_receive_func(void *data, size_t len, int32_t x, int32_t y, void *user_data)
|
|
{
|
|
struct dnd *dnd = user_data;
|
|
struct dnd_flower_message *message = data;
|
|
struct item *item;
|
|
struct rectangle allocation;
|
|
|
|
if (len == 0) {
|
|
return;
|
|
} else if (len != sizeof *message) {
|
|
fprintf(stderr, "odd message length %zu, expected %zu\n",
|
|
len, sizeof *message);
|
|
return;
|
|
}
|
|
|
|
widget_get_allocation(dnd->widget, &allocation);
|
|
item = item_create(dnd->display,
|
|
x - message->x_offset - allocation.x,
|
|
y - message->y_offset - allocation.y,
|
|
message->seed);
|
|
|
|
dnd_add_item(dnd, item);
|
|
window_schedule_redraw(dnd->window);
|
|
}
|
|
|
|
static void
|
|
dnd_drop_handler(struct window *window, struct input *input,
|
|
int32_t x, int32_t y, void *data)
|
|
{
|
|
struct dnd *dnd = data;
|
|
struct dnd_flower_message message;
|
|
|
|
if (dnd_get_item(dnd, x, y)) {
|
|
fprintf(stderr, "got 'drop', but no target\n");
|
|
return;
|
|
}
|
|
|
|
if (!dnd->self_only) {
|
|
input_receive_drag_data(input,
|
|
flower_mime_type,
|
|
dnd_receive_func, dnd);
|
|
} else if (dnd->current_drag) {
|
|
message.seed = dnd->current_drag->item->seed;
|
|
message.x_offset = dnd->current_drag->x_offset;
|
|
message.y_offset = dnd->current_drag->y_offset;
|
|
dnd_receive_func(&message, sizeof message, x, y, dnd);
|
|
dnd->current_drag = NULL;
|
|
} else {
|
|
fprintf(stderr, "ignoring drop from another client\n");
|
|
}
|
|
}
|
|
|
|
static struct dnd *
|
|
dnd_create(struct display *display)
|
|
{
|
|
struct dnd *dnd;
|
|
int x, y;
|
|
int32_t width, height;
|
|
unsigned int i;
|
|
|
|
dnd = xzalloc(sizeof *dnd);
|
|
dnd->window = window_create(display);
|
|
dnd->widget = window_frame_create(dnd->window, dnd);
|
|
window_set_title(dnd->window, "Wayland Drag and Drop Demo");
|
|
|
|
dnd->display = display;
|
|
dnd->key = 100;
|
|
|
|
for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
|
|
x = (i % 4) * (item_width + item_padding) + item_padding;
|
|
y = (i / 4) * (item_height + item_padding) + item_padding;
|
|
if ((i ^ (i >> 2)) & 1)
|
|
dnd->items[i] = item_create(display, x, y, 0);
|
|
else
|
|
dnd->items[i] = NULL;
|
|
}
|
|
|
|
window_set_user_data(dnd->window, dnd);
|
|
window_set_keyboard_focus_handler(dnd->window,
|
|
keyboard_focus_handler);
|
|
window_set_data_handler(dnd->window, dnd_data_handler);
|
|
window_set_drop_handler(dnd->window, dnd_drop_handler);
|
|
|
|
widget_set_redraw_handler(dnd->widget, dnd_redraw_handler);
|
|
widget_set_enter_handler(dnd->widget, dnd_enter_handler);
|
|
widget_set_motion_handler(dnd->widget, dnd_motion_handler);
|
|
widget_set_button_handler(dnd->widget, dnd_button_handler);
|
|
|
|
width = 4 * (item_width + item_padding) + item_padding;
|
|
height = 4 * (item_height + item_padding) + item_padding;
|
|
|
|
window_frame_set_child_size(dnd->widget, width, height);
|
|
|
|
return dnd;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct display *d;
|
|
struct dnd *dnd;
|
|
int i;
|
|
|
|
d = display_create(&argc, argv);
|
|
if (d == NULL) {
|
|
fprintf(stderr, "failed to create display: %m\n");
|
|
return -1;
|
|
}
|
|
|
|
dnd = dnd_create(d);
|
|
|
|
for (i = 1; i < argc; i++)
|
|
if (strcmp("--self-only", argv[i]) == 0)
|
|
dnd->self_only = 1;
|
|
|
|
display_run(d);
|
|
|
|
return 0;
|
|
}
|
|
|