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weston/window.c

398 lines
11 KiB

/*
* Copyright © 2008 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 <time.h>
#include <cairo.h>
#include <glib.h>
#include "wayland-client.h"
#include "wayland-glib.h"
#include "cairo-util.h"
#include "window.h"
struct window {
struct wl_display *display;
struct wl_surface *surface;
const char *title;
int x, y, width, height;
int minimum_width, minimum_height;
int margin;
int drag_x, drag_y, last_x, last_y;
int state;
uint32_t name;
int fd;
struct buffer *buffer;
window_resize_handler_t resize_handler;
window_frame_handler_t frame_handler;
window_acknowledge_handler_t acknowledge_handler;
window_key_handler_t key_handler;
void *user_data;
};
static void
rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
{
cairo_move_to(cr, x0, y0 + radius);
cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
cairo_line_to(cr, x1 - radius, y0);
cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
cairo_line_to(cr, x1, y1 - radius);
cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
cairo_line_to(cr, x0 + radius, y1);
cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
cairo_close_path(cr);
}
void
window_draw(struct window *window)
{
cairo_surface_t *surface;
cairo_t *cr;
int border = 2, radius = 5;
cairo_text_extents_t extents;
cairo_pattern_t *gradient, *outline, *bright, *dim;
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
window->width + window->margin * 2,
window->height + window->margin * 2);
outline = cairo_pattern_create_rgb(0.1, 0.1, 0.1);
bright = cairo_pattern_create_rgb(0.8, 0.8, 0.8);
dim = cairo_pattern_create_rgb(0.4, 0.4, 0.4);
cr = cairo_create(surface);
cairo_translate(cr, window->margin + 7, window->margin + 5);
cairo_set_line_width (cr, border);
cairo_set_source_rgba(cr, 0, 0, 0, 0.7);
rounded_rect(cr, 0, 0, window->width, window->height, radius);
cairo_fill(cr);
blur_surface(surface, 24 + radius);
cairo_translate(cr, -7, -5);
cairo_set_line_width (cr, border);
rounded_rect(cr, 1, 1, window->width - 1, window->height - 1, radius);
cairo_set_source(cr, outline);
cairo_stroke(cr);
rounded_rect(cr, 2, 2, window->width - 2, window->height - 2, radius - 1);
cairo_set_source(cr, bright);
cairo_stroke(cr);
rounded_rect(cr, 3, 3, window->width - 2, window->height - 2, radius - 1);
cairo_set_source(cr, dim);
cairo_stroke(cr);
rounded_rect(cr, 2, 2, window->width - 2, window->height - 2, radius - 1);
gradient = cairo_pattern_create_linear (0, 0, 0, 100);
cairo_pattern_add_color_stop_rgb(gradient, 0, 0.6, 0.6, 0.4);
cairo_pattern_add_color_stop_rgb(gradient, 1, 0.8, 0.8, 0.7);
cairo_set_source(cr, gradient);
cairo_fill(cr);
cairo_pattern_destroy(gradient);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_move_to(cr, 10, 50);
cairo_line_to(cr, window->width - 10, 50);
cairo_line_to(cr, window->width - 10, window->height - 10);
cairo_line_to(cr, 10, window->height - 10);
cairo_close_path(cr);
cairo_set_source(cr, dim);
cairo_stroke(cr);
cairo_move_to(cr, 11, 51);
cairo_line_to(cr, window->width - 10, 51);
cairo_line_to(cr, window->width - 10, window->height - 10);
cairo_line_to(cr, 11, window->height - 10);
cairo_close_path(cr);
cairo_set_source(cr, bright);
cairo_stroke(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_font_size(cr, 14);
cairo_text_extents(cr, window->title, &extents);
cairo_move_to(cr, (window->width - extents.width) / 2, 10 - extents.y_bearing);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_set_line_width (cr, 4);
cairo_text_path(cr, window->title);
cairo_set_source_rgb(cr, 0.1, 0.1, 0.1);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
cairo_destroy(cr);
window->buffer = buffer_create_from_cairo_surface(window->fd, surface);
cairo_surface_destroy(surface);
wl_surface_attach(window->surface,
window->buffer->name,
window->buffer->width,
window->buffer->height,
window->buffer->stride);
wl_surface_map(window->surface,
window->x - window->margin,
window->y - window->margin,
window->width + 2 * window->margin,
window->height + 2 * window->margin);
}
enum window_state {
WINDOW_STABLE,
WINDOW_MOVING,
WINDOW_RESIZING_UPPER_LEFT,
WINDOW_RESIZING_UPPER_RIGHT,
WINDOW_RESIZING_LOWER_LEFT,
WINDOW_RESIZING_LOWER_RIGHT
};
enum location {
LOCATION_INTERIOR,
LOCATION_UPPER_LEFT,
LOCATION_UPPER_RIGHT,
LOCATION_LOWER_LEFT,
LOCATION_LOWER_RIGHT,
LOCATION_OUTSIDE
};
static void
event_handler(struct wl_display *display,
uint32_t object, uint32_t opcode,
uint32_t size, uint32_t *p, void *data)
{
struct window *window = data;
struct rectangle rectangle;
int location;
int grip_size = 16;
/* FIXME: Object ID 1 is the display, for anything else we
* assume it's an input device. */
if (object == 1 && opcode == 3) {
uint32_t key = p[0];
/* Ignore acknowledge events for window move requests. */
if (key != 0)
return;
/* The acknowledge event means that the server
* processed our last commit request and we can now
* safely free the old window buffer if we resized and
* render the next frame into our back buffer.. */
if (window->buffer != NULL) {
buffer_destroy(window->buffer, window->fd);
window->buffer = NULL;
}
if (window->acknowledge_handler)
(*window->acknowledge_handler)(window, key,
window->user_data);
} else if (object == 1 && opcode == 4) {
/* The frame event means that the previous frame was
* composited, and we can now send the request to copy
* the frame we've rendered in the mean time into the
* servers surface buffer. */
if (window->frame_handler)
(*window->frame_handler)(window, p[0], p[1],
window->user_data);
} else if (object == 1) {
fprintf(stderr, "unexpected event from display: %d\n",
opcode);
exit(-1);
} else if (opcode == 0) {
int x = p[0], y = p[1];
window->last_x = x;
window->last_y = y;
switch (window->state) {
case WINDOW_MOVING:
window->x = window->drag_x + x;
window->y = window->drag_y + y;
wl_surface_map(window->surface,
window->x - window->margin,
window->y - window->margin,
window->width + 2 * window->margin,
window->height + 2 * window->margin);
wl_display_commit(window->display, 1);
break;
case WINDOW_RESIZING_LOWER_RIGHT:
window->width = window->drag_x + x;
window->height = window->drag_y + y;
window_get_child_rectangle(window, &rectangle);
if (window->resize_handler)
(*window->resize_handler)(window,
window->user_data);
break;
}
} else if (opcode == 1) {
int button = p[0], state = p[1];
if (window->x + window->width - grip_size <= window->last_x &&
window->last_x < window->x + window->width &&
window->y + window->height - grip_size <= window->last_y &&
window->last_y < window->y + window->height) {
location = LOCATION_LOWER_RIGHT;
} else if (window->x <= window->last_x &&
window->last_x < window->x + window->width &&
window->y <= window->last_y &&
window->last_y < window->y + window->height) {
location = LOCATION_INTERIOR;
} else {
location = LOCATION_OUTSIDE;
}
if (button == 0 && state == 1) {
switch (location) {
case LOCATION_INTERIOR:
window->drag_x = window->x - window->last_x;
window->drag_y = window->y - window->last_y;
window->state = WINDOW_MOVING;
break;
case LOCATION_LOWER_RIGHT:
window->drag_x = window->width - window->last_x;
window->drag_y = window->height - window->last_y;
window->state = WINDOW_RESIZING_LOWER_RIGHT;
break;
default:
window->state = WINDOW_STABLE;
break;
}
} else if (button == 0 && state == 0) {
window->state = WINDOW_STABLE;
}
} else if (opcode == 2) {
if (window->key_handler)
(*window->key_handler)(window, p[0], p[1],
window->user_data);
}
}
void
window_get_child_rectangle(struct window *window,
struct rectangle *rectangle)
{
rectangle->x = 10;
rectangle->y = 50;
rectangle->width = window->width - 20;
rectangle->height = window->height - 60;
}
void
window_set_child_size(struct window *window,
struct rectangle *rectangle)
{
window->width = rectangle->width + 20;
window->height = rectangle->height + 60;
}
void
window_copy(struct window *window,
struct rectangle *rectangle,
uint32_t name, uint32_t stride)
{
wl_surface_copy(window->surface,
window->margin + rectangle->x,
window->margin + rectangle->y,
name, stride,
0, 0, rectangle->width, rectangle->height);
}
void
window_set_resize_handler(struct window *window,
window_resize_handler_t handler, void *data)
{
window->resize_handler = handler;
window->user_data = data;
}
void
window_set_frame_handler(struct window *window,
window_frame_handler_t handler, void *data)
{
window->frame_handler = handler;
window->user_data = data;
}
void
window_set_acknowledge_handler(struct window *window,
window_acknowledge_handler_t handler, void *data)
{
window->acknowledge_handler = handler;
window->user_data = data;
}
void
window_set_key_handler(struct window *window,
window_key_handler_t handler, void *data)
{
window->key_handler = handler;
window->user_data = data;
}
void
window_set_minimum_size(struct window *window, uint32_t width, int32_t height)
{
window->minimum_width = width;
window->minimum_height = height;
}
struct window *
window_create(struct wl_display *display, int fd,
const char *title,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct window *window;
window = malloc(sizeof *window);
if (window == NULL)
return NULL;
memset(window, 0, sizeof *window);
window->display = display;
window->title = strdup(title);
window->surface = wl_display_create_surface(display);
window->x = x;
window->y = y;
window->minimum_width = 100;
window->minimum_height = 100;
window->width = width;
window->height = height;
window->margin = 16;
window->state = WINDOW_STABLE;
window->fd = fd;
wl_display_set_event_handler(display, event_handler, window);
return window;
}