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toaruos/userspace/lib/decorations.c

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/* 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) 2012-2017 Kevin Lange
*
* Client-side Window Decoration library
*/
#include <stdint.h>
#include "lib/graphics.h"
#include "lib/yutani.h"
#include "lib/shmemfonts.h"
#include "lib/dlfcn.h"
#include "decorations.h"
uint32_t decor_top_height = 33;
uint32_t decor_bottom_height = 6;
uint32_t decor_left_width = 6;
uint32_t decor_right_width = 6;
#define TEXT_OFFSET_X 10
#define TEXT_OFFSET_Y 16
#define BORDERCOLOR rgb(60,60,60)
#define BORDERCOLOR_INACTIVE rgb(30,30,30)
#define BACKCOLOR rgb(20,20,20)
#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;
static void (*callback_close)(yutani_window_t *) = NULL;
static void (*callback_resize)(yutani_window_t *) = 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 (uint32_t i = 0; i < window->height; ++i) {
GFX(ctx, 0, i) = color;
GFX(ctx, window->width - 1, i) = color;
}
for (uint32_t i = 1; i < decor_top_height; ++i) {
for (uint32_t j = 1; j < window->width - 1; ++j) {
GFX(ctx, j, i) = BACKCOLOR;
}
}
if (decors_active == DECOR_INACTIVE) {
draw_string(ctx, TEXT_OFFSET_X, TEXT_OFFSET_Y, TEXTCOLOR_INACTIVE, title);
draw_string(ctx, window->width - 20, TEXT_OFFSET_Y, TEXTCOLOR_INACTIVE, "✕");
} else {
draw_string(ctx, TEXT_OFFSET_X, TEXT_OFFSET_Y, TEXTCOLOR, title);
draw_string(ctx, window->width - 20, TEXT_OFFSET_Y, TEXTCOLOR, "✕");
}
for (uint32_t i = 0; i < window->width; ++i) {
GFX(ctx, i, 0) = color;
GFX(ctx, i, decor_top_height - 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 >= window->width - 20 && x <= window->width - 2 && y >= 2) {
return DECOR_CLOSE;
}
return 0;
}
static void initialize_simple() {
decor_top_height = 24;
decor_bottom_height = 1;
decor_left_width = 1;
decor_right_width = 1;
decor_render_decorations = render_decorations_simple;
decor_check_button_press = check_button_press_simple;
}
void render_decorations(yutani_window_t * window, gfx_context_t * ctx, char * title) {
if (!window) return;
if (!window->focused) {
decor_render_decorations(window, ctx, title, DECOR_INACTIVE);
} else {
decor_render_decorations(window, ctx, title, DECOR_ACTIVE);
}
}
void render_decorations_inactive(yutani_window_t * window, gfx_context_t * ctx, char * title) {
if (!window) return;
decor_render_decorations(window, ctx, title, DECOR_INACTIVE);
}
void init_decorations() {
init_shmemfonts();
char * theme = strdup(getenv("WM_THEME"));
char * options = strchr(theme,',');
if (options) {
*options = '\0';
options++;
}
if (!theme || !strcmp(theme, "simple")) {
initialize_simple();
} else {
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();
}
}
uint32_t decor_width() {
return decor_left_width + decor_right_width;
}
uint32_t decor_height() {
return decor_top_height + decor_bottom_height;
}
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;
}
static int within_decors(yutani_window_t * window, int x, int y) {
if ((x <= decor_left_width || x >= window->width - decor_right_width) && (x > 0 && x < window->width)) return 1;
if ((y <= decor_top_height || y >= window->height - decor_bottom_height) && (y > 0 && y < window->height)) return 1;
return 0;
}
#define LEFT_SIDE (me->new_x <= decor_left_width)
#define RIGHT_SIDE (me->new_x >= window->width - decor_right_width)
#define TOP_SIDE (me->new_y <= decor_top_height)
#define BOTTOM_SIDE (me->new_y >= window->height - decor_bottom_height)
static yutani_scale_direction_t check_resize_direction(struct yutani_msg_window_mouse_event * me, yutani_window_t * window) {
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 int 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*)me->wid);
if (!window) 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 < decor_top_height && resize_direction == SCALE_NONE) {
yutani_window_drag_start(yctx, window);
}
return DECOR_OTHER;
}
}
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;
}
}
old_resize_direction = resize_direction;
}
}
}
if (me->command == YUTANI_MOUSE_EVENT_CLICK) {
/* 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;
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;
}
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