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/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cairo.h>
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#include <math.h>
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#include <assert.h>
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#include <linux/input.h>
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#include <wayland-client.h>
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#include "window.h"
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struct spring {
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double current;
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double target;
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double previous;
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};
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struct resizor {
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struct display *display;
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struct window *window;
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struct widget *widget;
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struct window *menu;
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struct spring width;
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struct spring height;
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struct wl_callback *frame_callback;
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};
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static void
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spring_update(struct spring *spring)
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{
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double current, force;
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current = spring->current;
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force = (spring->target - current) / 20.0 +
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(spring->previous - current);
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spring->current = current + (current - spring->previous) + force;
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spring->previous = current;
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}
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static int
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spring_done(struct spring *spring)
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{
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return fabs(spring->previous - spring->target) < 0.1;
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}
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static const struct wl_callback_listener listener;
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static void
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frame_callback(void *data, struct wl_callback *callback, uint32_t time)
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{
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struct resizor *resizor = data;
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assert(!callback || callback == resizor->frame_callback);
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if (resizor->frame_callback) {
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wl_callback_destroy(resizor->frame_callback);
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resizor->frame_callback = NULL;
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}
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if (window_is_maximized(resizor->window))
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return;
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spring_update(&resizor->width);
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spring_update(&resizor->height);
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widget_schedule_resize(resizor->widget,
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resizor->width.current + 0.5,
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resizor->height.current + 0.5);
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if (!spring_done(&resizor->width) || !spring_done(&resizor->height)) {
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resizor->frame_callback =
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wl_surface_frame(
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window_get_wl_surface(resizor->window));
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wl_callback_add_listener(resizor->frame_callback, &listener,
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resizor);
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}
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}
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static const struct wl_callback_listener listener = {
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frame_callback
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};
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static void
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redraw_handler(struct widget *widget, void *data)
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{
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struct resizor *resizor = data;
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cairo_surface_t *surface;
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cairo_t *cr;
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struct rectangle allocation;
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widget_get_allocation(resizor->widget, &allocation);
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surface = window_get_surface(resizor->window);
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cr = cairo_create(surface);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_rectangle(cr,
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allocation.x,
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allocation.y,
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allocation.width,
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allocation.height);
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cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
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cairo_fill(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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static void
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keyboard_focus_handler(struct window *window,
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struct input *device, void *data)
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{
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struct resizor *resizor = data;
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window_schedule_redraw(resizor->window);
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}
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static void
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key_handler(struct window *window, struct input *input, uint32_t time,
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uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
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void *data)
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{
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struct resizor *resizor = data;
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struct rectangle allocation;
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if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
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return;
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window_get_allocation(resizor->window, &allocation);
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resizor->width.current = allocation.width;
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if (spring_done(&resizor->width))
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resizor->width.target = allocation.width;
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resizor->height.current = allocation.height;
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if (spring_done(&resizor->height))
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resizor->height.target = allocation.height;
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switch (sym) {
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case XKB_KEY_Up:
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if (allocation.height < 400)
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break;
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resizor->height.target = allocation.height - 200;
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break;
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case XKB_KEY_Down:
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if (allocation.height > 1000)
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break;
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resizor->height.target = allocation.height + 200;
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break;
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case XKB_KEY_Left:
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if (allocation.width < 400)
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break;
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resizor->width.target = allocation.width - 200;
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break;
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case XKB_KEY_Right:
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if (allocation.width > 1000)
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break;
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resizor->width.target = allocation.width + 200;
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break;
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case XKB_KEY_Escape:
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display_exit(resizor->display);
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break;
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}
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if (!resizor->frame_callback)
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frame_callback(resizor, NULL, 0);
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}
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static void
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menu_func(struct window *window,
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struct input *input, int index, void *user_data)
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{
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fprintf(stderr, "picked entry %d\n", index);
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}
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static void
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show_menu(struct resizor *resizor, struct input *input, uint32_t time)
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{
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int32_t x, y;
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static const char *entries[] = {
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"Roy", "Pris", "Leon", "Zhora"
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};
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input_get_position(input, &x, &y);
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window_show_menu(resizor->display, input, time, resizor->window,
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x - 10, y - 10, menu_func, entries, 4);
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}
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static void
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button_handler(struct widget *widget,
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struct input *input, uint32_t time,
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uint32_t button, enum wl_pointer_button_state state, void *data)
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{
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struct resizor *resizor = data;
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switch (button) {
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case BTN_RIGHT:
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if (state == WL_POINTER_BUTTON_STATE_PRESSED)
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show_menu(resizor, input, time);
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break;
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}
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}
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static struct resizor *
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resizor_create(struct display *display)
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{
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struct resizor *resizor;
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resizor = xzalloc(sizeof *resizor);
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resizor->window = window_create(display);
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resizor->widget = window_frame_create(resizor->window, resizor);
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window_set_title(resizor->window, "Wayland Resizor");
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resizor->display = display;
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window_set_key_handler(resizor->window, key_handler);
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window_set_user_data(resizor->window, resizor);
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widget_set_redraw_handler(resizor->widget, redraw_handler);
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window_set_keyboard_focus_handler(resizor->window,
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keyboard_focus_handler);
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widget_set_button_handler(resizor->widget, button_handler);
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resizor->height.previous = 400;
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resizor->height.current = 400;
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resizor->height.target = 400;
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resizor->width.previous = 400;
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resizor->width.current = 400;
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resizor->width.target = 400;
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widget_schedule_resize(resizor->widget, 400, 400);
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return resizor;
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}
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static void
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resizor_destroy(struct resizor *resizor)
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{
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if (resizor->frame_callback)
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wl_callback_destroy(resizor->frame_callback);
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widget_destroy(resizor->widget);
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window_destroy(resizor->window);
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free(resizor);
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}
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int
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main(int argc, char *argv[])
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{
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struct display *display;
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struct resizor *resizor;
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display = display_create(&argc, argv);
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if (display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return -1;
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}
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resizor = resizor_create(display);
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display_run(display);
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resizor_destroy(resizor);
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display_destroy(display);
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return 0;
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}
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