47eb8f4e91
Rather add a flush_surface utility that flushed the cairo_device thats associated to a surface.
694 lines
17 KiB
C
694 lines
17 KiB
C
/*
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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 <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 <gdk-pixbuf/gdk-pixbuf.h>
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#include "wayland-client.h"
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#include "window.h"
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#include "cairo-util.h"
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struct dnd {
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struct window *window;
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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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};
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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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const char *mime_type;
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};
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struct dnd_offer {
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int refcount;
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struct dnd *dnd;
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struct wl_array types;
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struct task io_task;
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const char *drag_type;
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uint32_t tag;
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int x, y;
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int fd;
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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 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 = display_create_surface(display, NULL, &rect, 0);
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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_draw(struct dnd *dnd)
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{
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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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int i;
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window_draw(dnd->window);
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surface = window_get_surface(dnd->window);
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cr = cairo_create(surface);
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window_get_child_allocation(dnd->window, &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_clip(cr);
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cairo_push_group(cr);
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cairo_translate(cr, allocation.x, allocation.y);
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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_paint(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, dnd->items[i]->y);
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cairo_paint(cr);
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}
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cairo_pop_group_to_source(cr);
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cairo_paint(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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window_flush(dnd->window);
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}
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static void
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redraw_handler(struct window *window, void *data)
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{
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struct dnd *dnd = data;
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dnd_draw(dnd);
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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 void
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dnd_offer_destroy(struct dnd_offer *dnd_offer)
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{
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dnd_offer->refcount--;
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if (dnd_offer->refcount == 0) {
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wl_array_release(&dnd_offer->types);
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free(dnd_offer);
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}
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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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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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int i;
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window_get_child_allocation(dnd->window, &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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drag_target(void *data,
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struct wl_drag *drag, 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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struct wl_input_device *device;
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cairo_surface_t *surface;
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struct wl_buffer *buffer;
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fprintf(stderr, "target %s\n", mime_type);
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device = input_get_input_device(dnd_drag->input);
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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_input_device_attach(device, dnd_drag->time, buffer,
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dnd_drag->hotspot_x, dnd_drag->hotspot_y);
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}
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static void
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drag_finish(void *data, struct wl_drag *drag, int fd)
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{
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struct dnd_drag *dnd_drag = data;
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if (!dnd_drag->mime_type) {
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dnd_add_item(dnd_drag->dnd, dnd_drag->item);
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window_schedule_redraw(dnd_drag->dnd->window);
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return;
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}
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struct dnd_flower_message dnd_flower_message;
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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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fprintf(stderr, "got 'finish', fd %d, sending dnd_flower_message\n", fd);
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write(fd, &dnd_flower_message, sizeof dnd_flower_message);
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close(fd);
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/* The 'finish' event marks the end of the session on the drag
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* source side and we need to clean up the drag object created
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* and the local state. */
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wl_drag_destroy(drag);
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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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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 void
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drag_reject(void *data, struct wl_drag *drag)
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{
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struct dnd_drag *dnd_drag = data;
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dnd_add_item(dnd_drag->dnd, dnd_drag->item);
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window_schedule_redraw(dnd_drag->dnd->window);
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}
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static const struct wl_drag_listener drag_listener = {
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drag_target,
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drag_finish,
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drag_reject
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};
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static void
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drag_offer_offer(void *data,
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struct wl_drag_offer *offer, const char *type)
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{
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struct dnd_offer *dnd_offer = data;
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char **p;
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p = wl_array_add(&dnd_offer->types, sizeof *p);
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if (p)
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*p = strdup(type);
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}
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static void
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drag_offer_pointer_focus(void *data,
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struct wl_drag_offer *offer,
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uint32_t time, struct wl_surface *surface,
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int32_t x, int32_t y,
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int32_t surface_x, int32_t surface_y)
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{
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struct dnd_offer *dnd_offer = data;
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struct window *window;
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char **p, **end;
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/* The last event in a dnd session is pointer_focus with a
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* NULL surface, whether or not we get the drop event. We
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* need to clean up the dnd_offer proxy and whatever state we
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* allocated. */
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if (!surface) {
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fprintf(stderr, "pointer focus NULL, session over\n");
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wl_drag_offer_destroy(offer);
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dnd_offer_destroy(dnd_offer);
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return;
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}
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fprintf(stderr, "drag pointer focus %p\n", surface);
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fprintf(stderr, "offered types:\n");
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end = dnd_offer->types.data + dnd_offer->types.size;
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for (p = dnd_offer->types.data; p < end; p++)
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fprintf(stderr, "\%s\n", *p);
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window = wl_surface_get_user_data(surface);
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dnd_offer->dnd = window_get_user_data(window);
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if (!dnd_get_item(dnd_offer->dnd, surface_x, surface_y)) {
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wl_drag_offer_accept(offer, time, "application/x-wayland-dnd-flower");
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dnd_offer->drag_type = "application/x-wayland-dnd-flower";
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dnd_offer->x = surface_x;
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dnd_offer->y = surface_y;
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} else {
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wl_drag_offer_accept(offer, time, NULL);
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dnd_offer->drag_type = NULL;
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}
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}
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static void
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drag_offer_motion(void *data,
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struct wl_drag_offer *offer, uint32_t time,
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int32_t x, int32_t y, int32_t surface_x, int32_t surface_y)
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{
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struct dnd_offer *dnd_offer = data;
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if (!dnd_get_item(dnd_offer->dnd, surface_x, surface_y)) {
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fprintf(stderr, "drag offer motion %d, %d, accepting\n",
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surface_x, surface_y);
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wl_drag_offer_accept(offer, time, "application/x-wayland-dnd-flower");
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dnd_offer->drag_type = "application/x-wayland-dnd-flower";
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dnd_offer->x = surface_x;
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dnd_offer->y = surface_y;
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} else {
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fprintf(stderr, "drag offer motion %d, %d, declining\n",
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surface_x, surface_y);
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wl_drag_offer_accept(offer, time, NULL);
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dnd_offer->drag_type = NULL;
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}
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}
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static void
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drop_io_func(struct task *task, uint32_t events)
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{
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struct dnd_offer *dnd_offer =
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container_of(task, struct dnd_offer, io_task);
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struct dnd *dnd = dnd_offer->dnd;
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struct dnd_flower_message dnd_flower_message;
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unsigned int len;
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struct item *item;
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len = read(dnd_offer->fd,
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&dnd_flower_message, sizeof dnd_flower_message);
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fprintf(stderr, "read %d bytes\n", len);
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close(dnd_offer->fd);
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item = item_create(dnd->display,
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dnd_offer->x - dnd_flower_message.x_offset - 26,
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dnd_offer->y - dnd_flower_message.y_offset - 66,
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dnd_flower_message.seed);
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dnd_add_item(dnd, item);
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window_schedule_redraw(dnd->window);
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dnd_offer_destroy(dnd_offer);
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}
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static void
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drag_offer_drop(void *data, struct wl_drag_offer *offer)
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{
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struct dnd_offer *dnd_offer = data;
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int p[2];
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if (!dnd_offer->drag_type) {
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fprintf(stderr, "got 'drop', but no target\n");
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wl_drag_offer_reject(offer);
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return;
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}
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fprintf(stderr, "got 'drop', sending write end of pipe\n");
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dnd_offer->refcount++;
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pipe(p);
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wl_drag_offer_receive(offer, p[1]);
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close(p[1]);
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dnd_offer->io_task.run = drop_io_func;
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dnd_offer->fd = p[0];
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display_watch_fd(dnd_offer->dnd->display,
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p[0], EPOLLIN, &dnd_offer->io_task);
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}
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static const struct wl_drag_offer_listener drag_offer_listener = {
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drag_offer_offer,
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drag_offer_pointer_focus,
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drag_offer_motion,
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drag_offer_drop,
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};
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static void
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global_handler(struct wl_display *display, uint32_t id,
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const char *interface, uint32_t version, void *data)
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{
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struct wl_drag_offer *offer;
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struct dnd_offer *dnd_offer;
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if (strcmp(interface, "wl_drag_offer") != 0)
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return;
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offer = wl_display_bind(display, id, &wl_drag_offer_interface);
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dnd_offer = malloc(sizeof *dnd_offer);
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if (dnd_offer == NULL)
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return;
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dnd_offer->refcount = 1;
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wl_drag_offer_add_listener(offer, &drag_offer_listener, dnd_offer);
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wl_array_init(&dnd_offer->types);
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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, *pointer;
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int32_t pointer_width, pointer_height, hotspot_x, hotspot_y;
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struct rectangle rectangle;
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cairo_pattern_t *pattern;
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cairo_t *cr;
|
|
|
|
pointer = display_get_pointer_surface(dnd->display,
|
|
POINTER_DRAGGING,
|
|
&pointer_width,
|
|
&pointer_height,
|
|
&hotspot_x,
|
|
&hotspot_y);
|
|
|
|
rectangle.width = item_width + 2 * pointer_width;
|
|
rectangle.height = item_height + 2 * pointer_height;
|
|
surface = display_create_surface(dnd->display, NULL, &rectangle, 0);
|
|
|
|
cr = cairo_create(surface);
|
|
cairo_translate(cr, pointer_width, pointer_height);
|
|
|
|
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
|
|
cairo_set_source_rgba(cr, 0, 0, 0, 0);
|
|
cairo_paint(cr);
|
|
|
|
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
|
|
cairo_set_source_surface(cr, item->surface, 0, 0);
|
|
pattern = cairo_pattern_create_rgba(0, 0, 0, opacity);
|
|
cairo_mask(cr, pattern);
|
|
cairo_pattern_destroy(pattern);
|
|
|
|
cairo_set_source_surface(cr, pointer,
|
|
x - item->x - hotspot_x,
|
|
y - item->y - hotspot_y);
|
|
cairo_surface_destroy(pointer);
|
|
cairo_paint(cr);
|
|
/* FIXME: more cairo-gl brokeness */
|
|
surface_flush_device(surface);
|
|
cairo_destroy(cr);
|
|
|
|
dnd_drag->hotspot_x = pointer_width + x - item->x;
|
|
dnd_drag->hotspot_y = pointer_height + y - item->y;
|
|
|
|
return surface;
|
|
}
|
|
|
|
static void
|
|
dnd_button_handler(struct window *window,
|
|
struct input *input, uint32_t time,
|
|
int button, int state, void *data)
|
|
{
|
|
struct dnd *dnd = data;
|
|
int32_t x, y;
|
|
struct item *item;
|
|
struct rectangle allocation;
|
|
struct dnd_drag *dnd_drag;
|
|
struct wl_drag *drag;
|
|
int i;
|
|
|
|
window_get_child_allocation(dnd->window, &allocation);
|
|
input_get_position(input, &x, &y);
|
|
item = dnd_get_item(dnd, x, y);
|
|
x -= allocation.x;
|
|
y -= allocation.y;
|
|
|
|
if (item && state == 1) {
|
|
fprintf(stderr, "start drag, item %p\n", item);
|
|
|
|
dnd_drag = malloc(sizeof *dnd_drag);
|
|
dnd_drag->dnd = dnd;
|
|
dnd_drag->input = input;
|
|
dnd_drag->time = time;
|
|
dnd_drag->item = item;
|
|
dnd_drag->x_offset = x - item->x;
|
|
dnd_drag->y_offset = y - item->y;
|
|
|
|
for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
|
|
if (item == dnd->items[i]){
|
|
dnd->items[i] = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
dnd_drag->opaque =
|
|
create_drag_cursor(dnd_drag, item, x, y, 1);
|
|
dnd_drag->translucent =
|
|
create_drag_cursor(dnd_drag, item, x, y, 0.2);
|
|
|
|
drag = window_create_drag(window);
|
|
wl_drag_offer(drag, "application/x-wayland-dnd-flower");
|
|
window_activate_drag(drag, window, input, time);
|
|
wl_drag_add_listener(drag, &drag_listener, dnd_drag);
|
|
window_schedule_redraw(dnd->window);
|
|
}
|
|
}
|
|
|
|
static int
|
|
dnd_motion_handler(struct window *window,
|
|
struct input *input, uint32_t time,
|
|
int32_t x, int32_t y,
|
|
int32_t sx, int32_t sy, void *data)
|
|
{
|
|
struct dnd *dnd = data;
|
|
struct item *item;
|
|
|
|
item = dnd_get_item(dnd, sx, sy);
|
|
|
|
if (item)
|
|
return POINTER_HAND1;
|
|
else
|
|
return POINTER_LEFT_PTR;
|
|
}
|
|
|
|
static struct dnd *
|
|
dnd_create(struct display *display)
|
|
{
|
|
struct dnd *dnd;
|
|
int i, x, y;
|
|
int32_t width, height;
|
|
|
|
dnd = malloc(sizeof *dnd);
|
|
if (dnd == NULL)
|
|
return dnd;
|
|
memset(dnd, 0, sizeof *dnd);
|
|
|
|
dnd->window = window_create(display, 400, 400);
|
|
window_set_title(dnd->window, "Wayland Drag and Drop Demo");
|
|
|
|
dnd->display = display;
|
|
dnd->key = 100;
|
|
|
|
wl_display_add_global_listener(display_get_display(display),
|
|
global_handler, dnd);
|
|
|
|
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_redraw_handler(dnd->window, redraw_handler);
|
|
window_set_keyboard_focus_handler(dnd->window,
|
|
keyboard_focus_handler);
|
|
window_set_button_handler(dnd->window,
|
|
dnd_button_handler);
|
|
|
|
window_set_motion_handler(dnd->window,
|
|
dnd_motion_handler);
|
|
|
|
width = 4 * (item_width + item_padding) + item_padding;
|
|
height = 4 * (item_height + item_padding) + item_padding;
|
|
window_set_child_size(dnd->window, width, height);
|
|
|
|
dnd_draw(dnd);
|
|
|
|
return dnd;
|
|
}
|
|
|
|
static const GOptionEntry option_entries[] = {
|
|
{ NULL }
|
|
};
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct display *d;
|
|
|
|
d = display_create(&argc, &argv, option_entries);
|
|
if (d == NULL) {
|
|
fprintf(stderr, "failed to create display: %m\n");
|
|
return -1;
|
|
}
|
|
|
|
dnd_create(d);
|
|
|
|
display_run(d);
|
|
|
|
return 0;
|
|
}
|