weston/clients/keyboard.c

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/*
* Copyright © 2012 Openismus GmbH
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/input.h>
#include <cairo.h>
#include "window.h"
#include "text-client-protocol.h"
#include "desktop-shell-client-protocol.h"
struct virtual_keyboard {
struct input_panel *input_panel;
struct input_method *input_method;
struct display *display;
};
struct keyboard {
struct virtual_keyboard *keyboard;
struct window *window;
struct widget *widget;
int cx;
int cy;
};
static void
redraw_handler(struct widget *widget, void *data)
{
struct keyboard *keyboard = data;
cairo_surface_t *surface;
struct rectangle allocation;
cairo_t *cr;
int cx, cy;
int i;
surface = window_get_surface(keyboard->window);
widget_get_allocation(keyboard->widget, &allocation);
cr = cairo_create(surface);
cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
cairo_clip(cr);
cairo_translate(cr, allocation.x, allocation.y);
cx = keyboard->cx;
cy = keyboard->cy;
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
cairo_rectangle(cr, 0, 0, 10 * cx, 5 * cy);
cairo_paint(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
for (i = 0; i <= 'Z' - '0'; ++i) {
const int x = i % 10;
const int y = i / 10;
char text[] = { i + '0', '\0' };
cairo_text_extents_t extents;
int dx, dy;
cairo_text_extents(cr, text, &extents);
dx = extents.width;
dy = extents.height;
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_rectangle(cr, x * cx, y * cy, cx, cy);
cairo_stroke(cr);
cairo_move_to(cr, x * cx + 0.5 * (cx - dx), y * cy + 0.5 * (cy - dy));
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_show_text(cr, text);
}
cairo_destroy(cr);
cairo_surface_destroy(surface);
}
static void
resize_handler(struct widget *widget,
int32_t width, int32_t height, void *data)
{
/* struct keyboard *keyboard = data; */
}
static void
button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button,
enum wl_pointer_button_state state, void *data)
{
struct keyboard *keyboard = data;
struct rectangle allocation;
int32_t x, y;
char text[] = { '0', '\0' };
if (state != WL_POINTER_BUTTON_STATE_PRESSED || button != BTN_LEFT) {
return;
}
input_get_position(input, &x, &y);
widget_get_allocation(keyboard->widget, &allocation);
x -= allocation.x;
y -= allocation.y;
text[0] = y / keyboard->cy * 10 + x / keyboard->cx + '0';
input_method_commit_string(keyboard->keyboard->input_method, text, -1);
widget_schedule_redraw(widget);
}
static void
global_handler(struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
struct virtual_keyboard *keyboard = data;
if (!strcmp(interface, "input_panel")) {
keyboard->input_panel = wl_display_bind(display, id, &input_panel_interface);
} else if (!strcmp(interface, "input_method")) {
keyboard->input_method = wl_display_bind(display, id, &input_method_interface);
}
}
static void
keyboard_create(struct output *output, struct virtual_keyboard *virtual_keyboard)
{
struct keyboard *keyboard;
keyboard = malloc(sizeof *keyboard);
memset(keyboard, 0, sizeof *keyboard);
keyboard->keyboard = virtual_keyboard;
keyboard->window = window_create_custom(virtual_keyboard->display);
keyboard->widget = window_add_widget(keyboard->window, keyboard);
window_set_title(keyboard->window, "Virtual keyboard");
window_set_user_data(keyboard->window, keyboard);
keyboard->cx = 40;
keyboard->cy = 40;
widget_set_redraw_handler(keyboard->widget, redraw_handler);
widget_set_resize_handler(keyboard->widget, resize_handler);
widget_set_button_handler(keyboard->widget, button_handler);
window_schedule_resize(keyboard->window, keyboard->cx * 10, keyboard->cy * 5);
input_panel_set_surface(virtual_keyboard->input_panel,
window_get_wl_surface(keyboard->window),
output_get_wl_output(output));
}
static void
handle_output_configure(struct output *output, void *data)
{
struct virtual_keyboard *virtual_keyboard = data;
/* skip existing outputs */
if (output_get_user_data(output))
return;
output_set_user_data(output, virtual_keyboard);
keyboard_create(output, virtual_keyboard);
}
int
main(int argc, char *argv[])
{
struct virtual_keyboard virtual_keyboard;
virtual_keyboard.display = display_create(argc, argv);
if (virtual_keyboard.display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
wl_display_add_global_listener(display_get_display(virtual_keyboard.display),
global_handler, &virtual_keyboard);
display_set_user_data(virtual_keyboard.display, &virtual_keyboard);
display_set_output_configure_handler(virtual_keyboard.display, handle_output_configure);
display_run(virtual_keyboard.display);
return 0;
}