clients: Add a simple desktop-shell app
This just provides the background surface and the top panel.
diff --git a/clients/desktop-shell.c b/clients/desktop-shell.c
new file mode 100644
index 0000000..58d47a8
--- /dev/null
+++ b/clients/desktop-shell.c
@@ -0,0 +1,392 @@
+/*
+ * Copyright © 2011 Kristian Høgsberg
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <math.h>
+#include <cairo.h>
+#include <sys/wait.h>
+#include <linux/input.h>
+
+#include "wayland-client.h"
+#include "wayland-glib.h"
+#include "window.h"
+
+#include <desktop-shell-client-protocol.h>
+
+struct desktop {
+ struct display *display;
+ struct desktop_shell *shell;
+ struct panel *panel;
+ struct window *background;
+ const char *background_path;
+};
+
+struct panel {
+ struct window *window;
+ struct wl_list item_list;
+ struct panel_item *focus;
+};
+
+struct panel_item {
+ struct wl_list link;
+ cairo_surface_t *icon;
+ int x, y, width, height;
+ int pressed;
+ const char *path;
+};
+
+static void
+sigchild_handler(int s)
+{
+ int status;
+ pid_t pid;
+
+ while (pid = waitpid(-1, &status, WNOHANG), pid > 0)
+ fprintf(stderr, "child %d exited\n", pid);
+}
+
+static void
+panel_activate_item(struct panel *panel, struct panel_item *item)
+{
+ pid_t pid;
+
+ pid = fork();
+ if (pid < 0) {
+ fprintf(stderr, "fork failed: %m\n");
+ return;
+ }
+
+ if (pid)
+ return;
+
+ if (execl(item->path, item->path, NULL) < 0) {
+ fprintf(stderr, "execl failed: %m\n");
+ exit(1);
+ }
+}
+
+static struct panel_item *
+panel_find_item(struct panel *panel, int32_t x, int32_t y)
+{
+ struct panel_item *item;
+
+ wl_list_for_each(item, &panel->item_list, link) {
+ if (item->x <= x && x < item->x + item->width &&
+ item->y <= y && y < item->y + item->height) {
+ return item;
+ }
+ }
+
+ return NULL;
+}
+
+static void
+panel_draw_item(struct panel *panel, cairo_t *cr, struct panel_item *item)
+{
+ int x, y;
+
+ if (item->pressed) {
+ x = item->x + 1;
+ y = item->y + 1;
+ } else {
+ x = item->x;
+ y = item->y;
+ }
+
+ cairo_set_source_surface(cr, item->icon, x, y);
+ cairo_paint(cr);
+
+ if (panel->focus == item) {
+ cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.4);
+ cairo_mask_surface(cr, item->icon, x, y);
+ }
+}
+
+static void
+panel_redraw_handler(struct window *window, void *data)
+{
+ cairo_surface_t *surface;
+ cairo_t *cr;
+ struct panel *panel = window_get_user_data(window);
+ struct panel_item *item;
+
+ window_draw(window);
+ surface = window_get_surface(window);
+ cr = cairo_create(surface);
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source_rgba(cr, 0.1, 0.1, 0.1, 0.9);
+ cairo_paint(cr);
+
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+ wl_list_for_each(item, &panel->item_list, link)
+ panel_draw_item(panel, cr, item);
+
+ cairo_destroy(cr);
+ cairo_surface_destroy(surface);
+ window_flush(window);
+}
+
+static void
+panel_set_focus(struct panel *panel, struct panel_item *focus)
+{
+ if (focus == panel->focus)
+ return;
+
+ panel->focus = focus;
+ window_schedule_redraw(panel->window);
+}
+
+static int
+panel_enter_handler(struct window *window,
+ struct input *input, uint32_t time,
+ int32_t x, int32_t y, void *data)
+{
+ struct panel *panel = data;
+ struct panel_item *item;
+
+ item = panel_find_item(panel, x, y);
+ panel_set_focus(panel, item);
+
+ return POINTER_LEFT_PTR;
+}
+
+static void
+panel_leave_handler(struct window *window,
+ struct input *input, uint32_t time, void *data)
+{
+ struct panel *panel = data;
+
+ panel_set_focus(panel, NULL);
+}
+
+static int
+panel_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 panel *panel = data;
+ struct panel_item *item;
+
+ if (panel->focus && panel->focus->pressed)
+ return POINTER_LEFT_PTR;
+
+ item = panel_find_item(panel, sx, sy);
+ panel_set_focus(panel, item);
+
+ return POINTER_LEFT_PTR;
+}
+
+static void
+panel_button_handler(struct window *window,
+ struct input *input, uint32_t time,
+ int button, int state, void *data)
+{
+ struct panel *panel = data;
+ struct panel_item *item;
+ int32_t x, y;
+
+ if (panel->focus && button == BTN_LEFT) {
+ panel->focus->pressed = state;
+ window_schedule_redraw(panel->window);
+
+ if (state == 0) {
+ panel_activate_item(panel, panel->focus);
+
+ input_get_position(input, &x, &y);
+ item = panel_find_item(panel, x, y);
+ panel_set_focus(panel, item);
+ }
+ }
+}
+
+static struct panel *
+panel_create(struct display *display)
+{
+ struct panel *panel;
+
+ panel = malloc(sizeof *panel);
+ memset(panel, 0, sizeof *panel);
+ wl_list_init(&panel->item_list);
+
+ panel->window = window_create(display, 0, 0);
+
+ window_set_title(panel->window, "panel");
+ window_set_decoration(panel->window, 0);
+ window_set_redraw_handler(panel->window, panel_redraw_handler);
+ window_set_custom(panel->window);
+ window_set_user_data(panel->window, panel);
+ window_set_enter_handler(panel->window, panel_enter_handler);
+ window_set_leave_handler(panel->window, panel_leave_handler);
+ window_set_motion_handler(panel->window, panel_motion_handler);
+ window_set_button_handler(panel->window, panel_button_handler);
+
+ return panel;
+}
+
+static void
+panel_add_item(struct panel *panel, const char *icon, const char *path)
+{
+ struct panel_item *item;
+
+ item = malloc(sizeof *item);
+ memset(item, 0, sizeof *item);
+ item->icon = cairo_image_surface_create_from_png(icon);
+ item->path = strdup(path);
+ wl_list_insert(panel->item_list.prev, &item->link);
+
+ item->width = cairo_image_surface_get_width(item->icon);
+ item->height = cairo_image_surface_get_height(item->icon);
+}
+
+static void
+panel_allocate(struct panel *panel, int width, int height)
+{
+ struct panel_item *item;
+ int x;
+
+ window_set_child_size(panel->window, width, height);
+ window_schedule_redraw(panel->window);
+
+ x = 10;
+ wl_list_for_each(item, &panel->item_list, link) {
+ item->x = x;
+ item->y = (height - item->height) / 2;
+ x += item->width + 10;
+ }
+}
+
+static void
+background_draw(struct window *window, int width, int height, const char *path)
+{
+ cairo_surface_t *surface, *image;
+ cairo_t *cr;
+
+ window_set_child_size(window, width, height);
+ window_draw(window);
+ surface = window_get_surface(window);
+
+ cr = cairo_create(surface);
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source_rgba(cr, 0.0, 0.0, 0.2, 1.0);
+ cairo_paint(cr);
+
+ if (path) {
+ image = cairo_image_surface_create_from_png(path);
+ cairo_set_source_surface(cr, image, 0, 0);
+ cairo_paint(cr);
+ }
+
+ cairo_destroy(cr);
+ cairo_surface_destroy(surface);
+ window_flush(window);
+}
+
+static void
+desktop_shell_configure(void *data,
+ struct desktop_shell *desktop_shell,
+ uint32_t time, uint32_t edges,
+ struct wl_surface *surface,
+ int32_t width, int32_t height)
+{
+ struct desktop *desktop = data;
+
+ if (surface == window_get_wl_surface(desktop->panel->window)) {
+ panel_allocate(desktop->panel, width, 32);
+ } else if (surface == window_get_wl_surface(desktop->background)) {
+ background_draw(desktop->background,
+ width, height, desktop->background_path);
+ }
+}
+
+static const struct desktop_shell_listener listener = {
+ desktop_shell_configure
+};
+
+static void
+global_handler(struct wl_display *display, uint32_t id,
+ const char *interface, uint32_t version, void *data)
+{
+ struct desktop *desktop = data;
+
+ if (!strcmp(interface, "desktop_shell")) {
+ desktop->shell =
+ wl_display_bind(display, id, &desktop_shell_interface);
+ desktop_shell_add_listener(desktop->shell, &listener, desktop);
+ }
+}
+
+static const struct {
+ const char *icon;
+ const char *path;
+} launchers[] = {
+ {
+ "/usr/share/icons/gnome/24x24/apps/utilities-terminal.png",
+ "/usr/bin/gnome-terminal"
+ },
+ {
+ "/usr/share/icons/hicolor/24x24/apps/google-chrome.png",
+ "/usr/bin/google-chrome"
+ },
+};
+
+int main(int argc, char *argv[])
+{
+ struct desktop desktop;
+ int i;
+
+ desktop.display = display_create(&argc, &argv, NULL);
+ if (desktop.display == NULL) {
+ fprintf(stderr, "failed to create display: %m\n");
+ return -1;
+ }
+
+ wl_display_add_global_listener(display_get_display(desktop.display),
+ global_handler, &desktop);
+
+ desktop.panel = panel_create(desktop.display);
+
+ for (i = 0; i < ARRAY_LENGTH(launchers); i++)
+ panel_add_item(desktop.panel,
+ launchers[i].icon, launchers[i].path);
+
+ desktop_shell_set_panel(desktop.shell,
+ window_get_wl_surface(desktop.panel->window));
+
+ desktop.background = window_create(desktop.display, 0, 0);
+ window_set_decoration(desktop.background, 0);
+ window_set_custom(desktop.background);
+ desktop.background_path = argv[1];
+ desktop_shell_set_background(desktop.shell,
+ window_get_wl_surface(desktop.background));
+
+ signal(SIGCHLD, sigchild_handler);
+
+ display_run(desktop.display);
+
+ return 0;
+}