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402 lines
8.5 KiB
402 lines
8.5 KiB
#include <SDL2/SDL.h>
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#include <stdbool.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include "api.h"
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#include "rencache.h"
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extern SDL_Window *window;
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static const char* button_name(int button)
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{
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switch (button) {
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case 1 : return "left";
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case 2 : return "middle";
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case 3 : return "right";
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default : return "?";
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}
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}
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static char* key_name(char *dst, int sym)
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{
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strcpy(dst, SDL_GetKeyName(sym));
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for (char *p = dst; *p; p++)
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*p = tolower(*p);
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return dst;
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}
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static int f_poll_event(lua_State *L)
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{
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char buf[16];
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int mx, my, wx, wy;
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SDL_Event e;
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top:
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if ( !SDL_PollEvent(&e) )
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return 0;
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switch (e.type) {
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case SDL_QUIT:
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lua_pushstring(L, "quit");
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return 1;
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case SDL_WINDOWEVENT:
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if (e.window.event == SDL_WINDOWEVENT_RESIZED) {
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lua_pushstring(L, "resized");
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lua_pushnumber(L, e.window.data1);
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lua_pushnumber(L, e.window.data2);
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return 3;
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} else if (e.window.event == SDL_WINDOWEVENT_EXPOSED) {
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rencache_invalidate();
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lua_pushstring(L, "exposed");
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return 1;
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}
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/* on some systems, when alt-tabbing to the window SDL will
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* queue up several KEYDOWN events for the `tab` key; we flush
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* all keydown events on focus so these are discarded */
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if (e.window.event == SDL_WINDOWEVENT_FOCUS_GAINED)
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SDL_FlushEvent(SDL_KEYDOWN);
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goto top;
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case SDL_DROPFILE:
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SDL_GetGlobalMouseState(&mx, &my);
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SDL_GetWindowPosition(window, &wx, &wy);
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lua_pushstring(L, "filedropped");
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lua_pushstring(L, e.drop.file);
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lua_pushnumber(L, mx - wx);
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lua_pushnumber(L, my - wy);
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SDL_free(e.drop.file);
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return 4;
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case SDL_KEYDOWN:
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lua_pushstring(L, "keypressed");
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lua_pushstring(L, key_name(buf, e.key.keysym.sym));
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return 2;
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case SDL_KEYUP:
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lua_pushstring(L, "keyreleased");
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lua_pushstring(L, key_name(buf, e.key.keysym.sym));
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return 2;
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case SDL_TEXTINPUT:
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lua_pushstring(L, "textinput");
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lua_pushstring(L, e.text.text);
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return 2;
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case SDL_MOUSEBUTTONDOWN:
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if (e.button.button == 1)
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SDL_CaptureMouse(1);
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lua_pushstring(L, "mousepressed");
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lua_pushstring(L, button_name(e.button.button));
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lua_pushnumber(L, e.button.x);
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lua_pushnumber(L, e.button.y);
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lua_pushnumber(L, e.button.clicks);
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return 5;
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case SDL_MOUSEBUTTONUP:
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if (e.button.button == 1)
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SDL_CaptureMouse(0);
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lua_pushstring(L, "mousereleased");
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lua_pushstring(L, button_name(e.button.button));
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lua_pushnumber(L, e.button.x);
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lua_pushnumber(L, e.button.y);
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return 4;
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case SDL_MOUSEMOTION:
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lua_pushstring(L, "mousemoved");
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lua_pushnumber(L, e.motion.x);
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lua_pushnumber(L, e.motion.y);
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lua_pushnumber(L, e.motion.xrel);
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lua_pushnumber(L, e.motion.yrel);
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return 5;
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case SDL_MOUSEWHEEL:
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lua_pushstring(L, "mousewheel");
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lua_pushnumber(L, e.wheel.y);
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return 2;
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default:
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goto top;
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}
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return 0;
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}
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static int f_wait_event(lua_State *L)
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{
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double n = luaL_checknumber(L, 1);
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lua_pushboolean(L, SDL_WaitEventTimeout(NULL, n * 1000));
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return 1;
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}
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static SDL_Cursor* cursor_cache[SDL_SYSTEM_CURSOR_HAND + 1];
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static const char *cursor_opts[] = {
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"arrow",
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"ibeam",
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"sizeh",
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"sizev",
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"hand",
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NULL
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};
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static const int cursor_enums[] = {
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SDL_SYSTEM_CURSOR_ARROW,
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SDL_SYSTEM_CURSOR_IBEAM,
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SDL_SYSTEM_CURSOR_SIZEWE,
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SDL_SYSTEM_CURSOR_SIZENS,
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SDL_SYSTEM_CURSOR_HAND
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};
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static int f_set_cursor(lua_State *L)
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{
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int opt = luaL_checkoption(L, 1, "arrow", cursor_opts);
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int n = cursor_enums[opt];
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SDL_Cursor *cursor = cursor_cache[n];
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if (!cursor) {
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cursor = SDL_CreateSystemCursor(n);
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cursor_cache[n] = cursor;
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}
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SDL_SetCursor(cursor);
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return 0;
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}
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static int f_set_window_title(lua_State *L)
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{
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const char *title = luaL_checkstring(L, 1);
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SDL_SetWindowTitle(window, title);
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return 0;
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}
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static const char *window_opts[] = { "normal", "maximized", "fullscreen", 0 };
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enum { WIN_NORMAL, WIN_MAXIMIZED, WIN_FULLSCREEN };
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static int f_set_window_mode(lua_State *L)
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{
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int n = luaL_checkoption(L, 1, "normal", window_opts);
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SDL_SetWindowFullscreen(window,
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n == WIN_FULLSCREEN ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
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if (n == WIN_NORMAL)
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SDL_RestoreWindow(window);
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if (n == WIN_MAXIMIZED)
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SDL_MaximizeWindow(window);
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return 0;
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}
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static int f_window_has_focus(lua_State *L)
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{
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unsigned flags = SDL_GetWindowFlags(window);
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lua_pushboolean(L, flags & SDL_WINDOW_INPUT_FOCUS);
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return 1;
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}
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static int f_show_confirm_dialog(lua_State *L)
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{
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const char *title = luaL_checkstring(L, 1);
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const char *msg = luaL_checkstring(L, 2);
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SDL_MessageBoxButtonData buttons[] = {
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{ SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, 1, "Yes" },
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{ SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT, 0, "No" },
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};
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SDL_MessageBoxData data = {
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.title = title,
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.message = msg,
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.numbuttons = 2,
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.buttons = buttons,
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};
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int buttonid;
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SDL_ShowMessageBox(&data, &buttonid);
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lua_pushboolean(L, buttonid == 1);
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return 1;
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}
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static int f_chdir(lua_State *L)
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{
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const char *path = luaL_checkstring(L, 1);
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int err = chdir(path);
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if (err)
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luaL_error(L, "chdir() failed");
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return 0;
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}
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static int f_list_dir(lua_State *L)
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{
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const char *path = luaL_checkstring(L, 1);
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DIR *dir = opendir(path);
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if (!dir) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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return 2;
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}
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lua_newtable(L);
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int i = 1;
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struct dirent *entry;
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while ( (entry = readdir(dir)) ) {
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if (strcmp(entry->d_name, "." ) == 0)
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continue;
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if (strcmp(entry->d_name, "..") == 0)
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continue;
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lua_pushstring(L, entry->d_name);
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lua_rawseti(L, -2, i);
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i++;
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}
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closedir(dir);
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return 1;
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}
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static int f_absolute_path(lua_State *L)
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{
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const char *path = luaL_checkstring(L, 1);
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char *res = realpath(path, NULL);
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if (!res)
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return 0;
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lua_pushstring(L, res);
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free(res);
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return 1;
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}
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static int f_get_file_info(lua_State *L)
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{
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const char *path = luaL_checkstring(L, 1);
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struct stat s;
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int err = stat(path, &s);
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if (err < 0) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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return 2;
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}
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lua_newtable(L);
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lua_pushnumber(L, s.st_mtime);
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lua_setfield(L, -2, "modified");
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lua_pushnumber(L, s.st_size);
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lua_setfield(L, -2, "size");
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if (S_ISREG(s.st_mode)) {
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lua_pushstring(L, "file");
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} else if (S_ISDIR(s.st_mode)) {
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lua_pushstring(L, "dir");
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} else {
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lua_pushnil(L);
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}
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lua_setfield(L, -2, "type");
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return 1;
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}
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static int f_get_clipboard(lua_State *L)
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{
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char *text = SDL_GetClipboardText();
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if (!text)
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return 0;
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lua_pushstring(L, text);
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SDL_free(text);
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return 1;
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}
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static int f_set_clipboard(lua_State *L)
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{
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const char *text = luaL_checkstring(L, 1);
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SDL_SetClipboardText(text);
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return 0;
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}
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static int f_get_time(lua_State *L)
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{
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double n = SDL_GetPerformanceCounter() / (double)SDL_GetPerformanceFrequency();
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lua_pushnumber(L, n);
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return 1;
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}
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static int f_sleep(lua_State *L)
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{
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double n = luaL_checknumber(L, 1);
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SDL_Delay(n * 1000);
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return 0;
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}
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static int f_exec(lua_State *L)
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{
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size_t len;
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const char *cmd = luaL_checklstring(L, 1, &len);
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char *buf = malloc(len + 32);
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if (!buf)
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luaL_error(L, "buffer allocation failed");
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sprintf(buf, "%s &", cmd);
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int res = system(buf);
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(void) res;
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free(buf);
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return 0;
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}
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static int f_fuzzy_match(lua_State *L)
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{
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const char *str = luaL_checkstring(L, 1);
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const char *ptn = luaL_checkstring(L, 2);
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int score = 0;
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int run = 0;
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while (*str && *ptn) {
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while (*str == ' ')
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str++;
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while (*ptn == ' ')
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ptn++;
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if (tolower(*str) == tolower(*ptn)) {
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score += run * 10 - (*str != *ptn);
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run++;
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ptn++;
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} else {
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score -= 10;
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run = 0;
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}
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str++;
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}
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if (*ptn)
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return 0;
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lua_pushnumber(L, score - (int) strlen(str));
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return 1;
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}
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static const luaL_Reg lib[] = {
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{ "poll_event", f_poll_event },
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{ "wait_event", f_wait_event },
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{ "set_cursor", f_set_cursor },
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{ "set_window_title", f_set_window_title },
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{ "set_window_mode", f_set_window_mode },
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{ "window_has_focus", f_window_has_focus },
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{ "show_confirm_dialog", f_show_confirm_dialog },
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{ "chdir", f_chdir },
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{ "list_dir", f_list_dir },
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{ "absolute_path", f_absolute_path },
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{ "get_file_info", f_get_file_info },
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{ "get_clipboard", f_get_clipboard },
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{ "set_clipboard", f_set_clipboard },
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{ "get_time", f_get_time },
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{ "sleep", f_sleep },
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{ "exec", f_exec },
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{ "fuzzy_match", f_fuzzy_match },
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{ NULL, NULL }
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};
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int luaopen_system(lua_State *L)
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{
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luaL_newlib(L, lib);
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return 1;
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}
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