toaruos/lib/decorations.c

340 lines
11 KiB
C

/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
* Copyright (C) 2012-2018 K. Lange
*
* Client-side Window Decoration library
*/
#include <stdint.h>
#include <math.h>
#include <dlfcn.h>
#include <toaru/graphics.h>
#include <toaru/yutani.h>
#include <toaru/decorations.h>
#include <toaru/menu.h>
#include <toaru/text.h>
#define TEXT_OFFSET_X 10
#define TEXT_OFFSET_Y 3
#define BORDERCOLOR rgb(59,59,59)
#define BORDERCOLOR_INACTIVE rgb(30,30,30)
#define TEXTCOLOR rgb(230,230,230)
#define TEXTCOLOR_INACTIVE rgb(140,140,140)
void (*decor_render_decorations)(yutani_window_t *, gfx_context_t *, char *, int) = NULL;
int (*decor_check_button_press)(yutani_window_t *, int x, int y) = NULL;
int (*decor_get_bounds)(yutani_window_t *, struct decor_bounds *) = NULL;
static void (*callback_close)(yutani_window_t *) = NULL;
static void (*callback_resize)(yutani_window_t *) = NULL;
static void (*callback_maximize)(yutani_window_t *) = NULL;
static int close_enough(struct yutani_msg_window_mouse_event * me) {
return (me->command == YUTANI_MOUSE_EVENT_RAISE &&
sqrt(pow(me->new_x - me->old_x, 2.0) + pow(me->new_y - me->old_y, 2.0)) < 10.0);
}
static struct TT_Font * tt_font = NULL;
static void render_decorations_simple(yutani_window_t * window, gfx_context_t * ctx, char * title, int decors_active) {
uint32_t color = BORDERCOLOR;
if (decors_active == DECOR_INACTIVE) {
color = BORDERCOLOR_INACTIVE;
}
for (int i = 0; i < (int)window->height; ++i) {
GFX(ctx, 0, i) = color;
GFX(ctx, window->width - 1, i) = color;
}
for (int i = 1; i < (int)24; ++i) {
for (int j = 1; j < (int)window->width - 1; ++j) {
GFX(ctx, j, i) = color;
}
}
tt_set_size(tt_font, 12);
uint32_t textcolor = (decors_active == DECOR_INACTIVE) ? TEXTCOLOR_INACTIVE : TEXTCOLOR;
tt_draw_string(ctx, tt_font, TEXT_OFFSET_X, TEXT_OFFSET_Y + 12, title, textcolor);
tt_draw_string(ctx, tt_font, window->width - 20, TEXT_OFFSET_Y + 12, "x", textcolor);
for (uint32_t i = 0; i < window->width; ++i) {
GFX(ctx, i, 0) = color;
GFX(ctx, i, 24 - 1) = color;
GFX(ctx, i, window->height - 1) = color;
}
}
static int check_button_press_simple(yutani_window_t * window, int x, int y) {
if (x >= (int)window->width - 20 && x <= (int)window->width - 2 && y >= 2) {
return DECOR_CLOSE;
}
return 0;
}
static int get_bounds_simple(yutani_window_t * window, struct decor_bounds * bounds) {
/* Does not change with window state */
bounds->top_height = 24;
bounds->bottom_height = 1;
bounds->left_width = 1;
bounds->right_width = 1;
bounds->width = bounds->left_width + bounds->right_width;
bounds->height = bounds->top_height + bounds->bottom_height;
return 0;
}
static void initialize_simple() {
decor_render_decorations = render_decorations_simple;
decor_check_button_press = check_button_press_simple;
decor_get_bounds = get_bounds_simple;
tt_font = tt_font_from_shm("sans-serif");
}
void render_decorations(yutani_window_t * window, gfx_context_t * ctx, char * title) {
if (!window) return;
window->decorator_flags |= DECOR_FLAG_DECORATED;
if (window->focused || !hashmap_is_empty(menu_get_windows_hash())) {
decor_render_decorations(window, ctx, title, DECOR_ACTIVE);
} else {
decor_render_decorations(window, ctx, title, DECOR_INACTIVE);
}
}
void render_decorations_inactive(yutani_window_t * window, gfx_context_t * ctx, char * title) {
if (!window) return;
window->decorator_flags |= DECOR_FLAG_DECORATED;
decor_render_decorations(window, ctx, title, DECOR_INACTIVE);
}
static void _decor_maximize(yutani_t * yctx, yutani_window_t * window) {
if (callback_maximize) {
callback_maximize(window);
} else {
yutani_special_request(yctx, window, YUTANI_SPECIAL_REQUEST_MAXIMIZE);
}
}
static yutani_window_t * _decor_menu_owner_window = NULL;
static struct MenuList * _decor_menu = NULL;
static void _decor_start_move(struct MenuEntry * self) {
if (!_decor_menu_owner_window)
return;
yutani_focus_window(_decor_menu_owner_window->ctx, _decor_menu_owner_window->wid);
yutani_window_drag_start(_decor_menu_owner_window->ctx, _decor_menu_owner_window);
}
static void _decor_start_maximize(struct MenuEntry * self) {
if (!_decor_menu_owner_window)
return;
_decor_maximize(_decor_menu_owner_window->ctx, _decor_menu_owner_window);
yutani_focus_window(_decor_menu_owner_window->ctx, _decor_menu_owner_window->wid);
}
static void _decor_close(struct MenuEntry * self) {
if (!_decor_menu_owner_window)
return;
yutani_special_request(_decor_menu_owner_window->ctx, _decor_menu_owner_window, YUTANI_SPECIAL_REQUEST_PLEASE_CLOSE);
}
yutani_window_t * decor_show_default_menu(yutani_window_t * window, int x, int y) {
if (_decor_menu->window) return NULL;
_decor_menu_owner_window = window;
menu_show_at(_decor_menu, window, x - window->x, y - window->y);
return _decor_menu->window;
}
void init_decorations() {
char * tmp = getenv("WM_THEME");
char * theme = tmp ? strdup(tmp) : NULL;
_decor_menu = menu_create();
menu_insert(_decor_menu, menu_create_normal(NULL, NULL, "Maximize", _decor_start_maximize));
menu_insert(_decor_menu, menu_create_normal(NULL, NULL, "Move", _decor_start_move));
menu_insert(_decor_menu, menu_create_separator());
menu_insert(_decor_menu, menu_create_normal(NULL, NULL, "Close", _decor_close));
if (!theme || !strcmp(theme, "simple")) {
initialize_simple();
} else {
char * options = strchr(theme,',');
if (options) {
*options = '\0';
options++;
}
char lib_name[100];
sprintf(lib_name, "libtoaru_decor-%s.so", theme);
void * theme_lib = dlopen(lib_name, 0);
if (!theme_lib) {
goto _theme_error;
}
void (*theme_init)(char *) = dlsym(theme_lib, "decor_init");
if (!theme_init) {
goto _theme_error;
}
theme_init(options);
return;
_theme_error:
fprintf(stderr, "decorations: could not load theme `%s`: %s\n", theme, dlerror());
initialize_simple();
}
}
void decor_set_close_callback(void (*callback)(yutani_window_t *)) {
callback_close = callback;
}
void decor_set_resize_callback(void (*callback)(yutani_window_t *)) {
callback_resize = callback;
}
void decor_set_maximize_callback(void (*callback)(yutani_window_t *)) {
callback_maximize = callback;
}
static int within_decors(yutani_window_t * window, int x, int y) {
struct decor_bounds bounds;
decor_get_bounds(window, &bounds);
if ((x <= (int)bounds.left_width || x >= (int)window->width - (int)bounds.right_width) && (x > 0 && x < (int)window->width)) return 1;
if ((y <= (int)bounds.top_height || y >= (int)window->height - (int)bounds.bottom_height) && (y > 0 && y < (int)window->height)) return 1;
return 0;
}
#define LEFT_SIDE (me->new_x <= (int)bounds.left_width)
#define RIGHT_SIDE (me->new_x >= (int)window->width - (int)bounds.right_width)
#define TOP_SIDE (me->new_y <= (int)bounds.top_height)
#define BOTTOM_SIDE (me->new_y >= (int)window->height - (int)bounds.bottom_height)
static yutani_scale_direction_t check_resize_direction(struct yutani_msg_window_mouse_event * me, yutani_window_t * window) {
struct decor_bounds bounds;
decor_get_bounds(window, &bounds);
yutani_scale_direction_t resize_direction = SCALE_NONE;
if (LEFT_SIDE && !TOP_SIDE && !BOTTOM_SIDE) {
resize_direction = SCALE_LEFT;
} else if (RIGHT_SIDE && !TOP_SIDE && !BOTTOM_SIDE) {
resize_direction = SCALE_RIGHT;
} else if (BOTTOM_SIDE && !LEFT_SIDE && !RIGHT_SIDE) {
resize_direction = SCALE_DOWN;
} else if (BOTTOM_SIDE && LEFT_SIDE) {
resize_direction = SCALE_DOWN_LEFT;
} else if (BOTTOM_SIDE && RIGHT_SIDE) {
resize_direction = SCALE_DOWN_RIGHT;
} else if (TOP_SIDE && LEFT_SIDE) {
resize_direction = SCALE_UP_LEFT;
} else if (TOP_SIDE && RIGHT_SIDE) {
resize_direction = SCALE_UP_RIGHT;
} else if (TOP_SIDE && (me->new_y < 5)) {
resize_direction = SCALE_UP;
}
return resize_direction;
}
static yutani_scale_direction_t old_resize_direction = SCALE_NONE;
int decor_handle_event(yutani_t * yctx, yutani_msg_t * m) {
if (m) {
switch (m->type) {
case YUTANI_MSG_WINDOW_MOUSE_EVENT:
{
struct yutani_msg_window_mouse_event * me = (void*)m->data;
yutani_window_t * window = hashmap_get(yctx->windows, (void*)(uintptr_t)me->wid);
struct decor_bounds bounds;
decor_get_bounds(window, &bounds);
if (!window) return 0;
if (!(window->decorator_flags & DECOR_FLAG_DECORATED)) return 0;
if (within_decors(window, me->new_x, me->new_y)) {
int button = decor_check_button_press(window, me->new_x, me->new_y);
if (me->command == YUTANI_MOUSE_EVENT_DOWN && me->buttons & YUTANI_MOUSE_BUTTON_LEFT) {
if (!button) {
/* Resize edges */
yutani_scale_direction_t resize_direction = check_resize_direction(me, window);
if (resize_direction != SCALE_NONE) {
yutani_window_resize_start(yctx, window, resize_direction);
}
if (me->new_y < (int)bounds.top_height && resize_direction == SCALE_NONE) {
yutani_window_drag_start(yctx, window);
}
return DECOR_OTHER;
}
}
if (!button && (me->buttons & YUTANI_MOUSE_BUTTON_RIGHT)) {
return DECOR_RIGHT;
}
if (me->command == YUTANI_MOUSE_EVENT_MOVE) {
if (!button) {
/* Resize edges */
yutani_scale_direction_t resize_direction = check_resize_direction(me, window);
if (resize_direction != old_resize_direction) {
if (resize_direction == SCALE_NONE) {
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESET);
} else {
switch (resize_direction) {
case SCALE_UP:
case SCALE_DOWN:
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESIZE_VERTICAL);
break;
case SCALE_LEFT:
case SCALE_RIGHT:
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESIZE_HORIZONTAL);
break;
case SCALE_DOWN_RIGHT:
case SCALE_UP_LEFT:
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESIZE_UP_DOWN);
break;
case SCALE_DOWN_LEFT:
case SCALE_UP_RIGHT:
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESIZE_DOWN_UP);
break;
case SCALE_AUTO:
case SCALE_NONE:
break;
}
}
old_resize_direction = resize_direction;
}
}
}
if (me->command == YUTANI_MOUSE_EVENT_CLICK || close_enough(me)) {
/* Determine if we clicked on a button */
switch (button) {
case DECOR_CLOSE:
if (callback_close) callback_close(window);
break;
case DECOR_RESIZE:
if (callback_resize) callback_resize(window);
break;
case DECOR_MAXIMIZE:
_decor_maximize(yctx, window);
break;
default:
break;
}
return button;
}
} else {
if (old_resize_direction != SCALE_NONE) {
yutani_window_show_mouse(yctx, window, YUTANI_CURSOR_TYPE_RESET);
old_resize_direction = 0;
}
}
}
break;
}
}
return 0;
}