diff options
Diffstat (limited to 'src/teliva.c')
| -rw-r--r-- | src/teliva.c | 1008 |
1 files changed, 1008 insertions, 0 deletions
diff --git a/src/teliva.c b/src/teliva.c new file mode 100644 index 0000000..9a6ec3e --- /dev/null +++ b/src/teliva.c @@ -0,0 +1,1008 @@ +#include <assert.h> +#include <ctype.h> +#include <ncurses.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include "lua.h" +#include "lauxlib.h" +#include "teliva.h" +#include "tlv.h" + +/*** Standard UI elements */ + +int menu_column = 0; + +void draw_string_on_menu(const char* s) { + mvaddstr(LINES-1, menu_column, " "); + ++menu_column; + mvaddstr(LINES-1, menu_column, s); + menu_column += strlen(s); + mvaddstr(LINES-1, menu_column, " "); + ++menu_column; +} + +void draw_menu_item(const char* key, const char* name) { + attroff(A_REVERSE); + draw_string_on_menu(key); + attron(A_REVERSE); + draw_string_on_menu(name); +} + +static void draw_menu(lua_State* L) { + attron(A_BOLD|A_REVERSE|COLOR_PAIR(COLOR_PAIR_MENU)); + for (int x = 0; x < COLS; ++x) + mvaddch(LINES-1, x, ' '); + menu_column = 2; + draw_menu_item("^x", "exit"); + draw_menu_item("^e", "edit"); + + /* render any app-specific items */ + lua_getglobal(L, "menu"); + int table = lua_gettop(L); + if (lua_istable(L, -1)) { + for (int i = 1; i <= luaL_getn(L, table); ++i) { + lua_rawgeti(L, table, i); + int menu_item = lua_gettop(L); + lua_rawgeti(L, menu_item, 1); /* key */ + lua_rawgeti(L, menu_item, 2); /* value */ + draw_menu_item(lua_tostring(L, -2), lua_tostring(L, -1)); + lua_pop(L, 3); + } + } + + lua_pop(L, 1); + attrset(A_NORMAL); +} + +void render_trusted_teliva_data(lua_State* L) { + init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND); + init_pair(COLOR_PAIR_MENU, COLOR_FOREGROUND, COLOR_BACKGROUND); + draw_menu(L); +} + +/*** Error reporting */ + +const char* Previous_error = NULL; + +/* return final y containing text */ +static int render_wrapped_text(int y, int xmin, int xmax, const char* text) { + int x = xmin; + move(y, x); + for (int j = 0; j < strlen(text); ++j) { + char c = text[j]; + if (c != '\n') { + addch(text[j]); + ++x; + if (x >= xmax) { + ++y; + x = xmin; + move(y, x); + } + } + else { + /* newline */ + ++y; + x = xmin; + move(y, x); + } + } + return y; +} + +void render_previous_error(void) { + if (!Previous_error) return; + init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND); + attron(COLOR_PAIR(COLOR_PAIR_ERROR)); + render_wrapped_text(LINES-10, COLS/2, COLS, Previous_error); + attroff(COLOR_PAIR(COLOR_PAIR_ERROR)); +} + +extern char* strdup(const char* s); +extern void developer_mode(lua_State* L); +int report_in_developer_mode(lua_State* L, int status) { + if (status && !lua_isnil(L, -1)) { + Previous_error = strdup(lua_tostring(L, -1)); /* memory leak */ + if (Previous_error == NULL) Previous_error = "(error object is not a string)"; + lua_pop(L, 1); + for (int x = 0; x < COLS; ++x) { + mvaddch(LINES-2, x, ' '); + mvaddch(LINES-1, x, ' '); + } + render_previous_error(); + mvaddstr(LINES-1, 0, "press any key to continue"); + getch(); + developer_mode(L); + } + return status; +} + +/*** Developer mode, big picture view */ + +#define CURRENT_DEFINITION_LEN 256 + +static void big_picture_menu(void) { + attrset(A_REVERSE); + for (int x = 0; x < COLS; ++x) + mvaddch(LINES-1, x, ' '); + attrset(A_NORMAL); + menu_column = 2; + draw_menu_item("^x", "go back"); + draw_menu_item("^g", "go to highlight"); + draw_menu_item("Enter", "submit"); + draw_menu_item("^h", "backspace"); + draw_menu_item("^u", "clear"); + draw_menu_item("^r", "recent changes"); + attrset(A_NORMAL); +} + +static int is_current_definition(lua_State* L, const char* definition_name, int current_history_array_index, int history_array_location, int history_array_size) { + /* Sequentially scan back through history_array until current_history_array_index. + * Is there an earlier definition of definition_name? */ + int oldtop = lua_gettop(L); + int found = 0; + for (int i = history_array_size; i > current_history_array_index; --i) { + lua_rawgeti(L, history_array_location, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0;) { + lua_pop(L, 1); // value + const char* curr = lua_tostring(L, -1); + if (strcmp(curr, definition_name) == 0) { + found = 1; + lua_pop(L, 1); // key + break; + } + // leave key on stack for next iteration + } + lua_pop(L, 1); // history element + if (found) + break; + } + if(oldtop != lua_gettop(L)) { + endwin(); + printf("%d %d\n", oldtop, lua_gettop(L)); + exit(1); + } + return !found; +} + +void draw_definition_name(const char* definition_name) { + attron(COLOR_PAIR(COLOR_PAIR_SELECTABLE)); + addstr(" "); + addstr(definition_name); + addstr(" "); + attroff(COLOR_PAIR(COLOR_PAIR_SELECTABLE)); + addstr(" "); +} + +void draw_highlighted_definition_name(const char* definition_name) { + attron(A_REVERSE); + addstr(" "); + addstr(definition_name); + addstr(" "); + attroff(A_REVERSE); + addstr(" "); +} + +/* return true if submitted */ +static int edit_current_definition(lua_State* L); +static void recent_changes_view(lua_State* L); +void big_picture_view(lua_State* L) { + /* Without any intervening edits, big_picture_view always stably renders + * definitions in exactly the same spatial order, both in levels from top to + * bottom and in indexes within each level from left to right. */ + int highlight_level = 0; + int highlight_index_within_level = 0; + int level_size[30] = {0}; /* number of indexes within each level */ + char highlight[CURRENT_DEFINITION_LEN+1] = {0}; +restart: + clear(); + luaL_newmetatable(L, "__teliva_call_graph_depth"); + int cgt = lua_gettop(L); + // special-case: we don't instrument the call to main, but it's always at depth 1 + lua_pushinteger(L, 1); + lua_setfield(L, cgt, "main"); + // segment definitions by depth + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + int history_array_size = luaL_getn(L, history_array); + + int y = 1; + attrset(A_BOLD); + mvaddstr(y, 0, "Big picture"); + attrset(A_NORMAL); + y += 2; + mvaddstr(y, 0, "data: "); + // first: data (non-functions) that's not the Teliva menu or curses variables + if (highlight_level < 0) highlight_level = 0; + int level = 0; + int index_within_level = 0; + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { + const char* definition_name = lua_tostring(L, -2); + if (is_special_history_key(definition_name)) continue; + lua_getglobal(L, definition_name); + int is_userdata = lua_isuserdata(L, -1); + int is_function = lua_isfunction(L, -1); + lua_pop(L, 1); + if (strcmp(definition_name, "menu") != 0 // required by all Teliva programs + && !is_function // functions are not data + && !is_userdata // including curses window objects + // (unlikely to have an interesting definition) + ) { + if (is_current_definition(L, definition_name, i, history_array, history_array_size)) { + if (level == highlight_level && index_within_level == highlight_index_within_level) { + draw_highlighted_definition_name(definition_name); + strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN); + } else { + draw_definition_name(definition_name); + } + ++index_within_level; + } + } + } + lua_pop(L, 1); // history element + } + + // second: menu and other userdata + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { + const char* definition_name = lua_tostring(L, -2); + if (is_special_history_key(definition_name)) continue; + lua_getglobal(L, definition_name); + int is_userdata = lua_isuserdata(L, -1); + lua_pop(L, 1); + if (strcmp(definition_name, "menu") == 0 + || is_userdata // including curses window objects + ) { + if (is_current_definition(L, definition_name, i, history_array, history_array_size)) { + if (level == highlight_level && index_within_level == highlight_index_within_level) { + draw_highlighted_definition_name(definition_name); + strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN); + } else { + draw_definition_name(definition_name); + } + ++index_within_level; + } + } + } + lua_pop(L, 1); // history element + } + level_size[level] = index_within_level; + level++; + + // functions by level + y += 2; + mvprintw(y, 0, "functions: "); + y++; + for (int depth = 1; ; ++depth) { + mvaddstr(y, 0, " "); + bool drew_anything = false; + index_within_level = 0; + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { + const char* definition_name = lua_tostring(L, -2); + if (is_special_history_key(definition_name)) continue; + lua_getfield(L, cgt, definition_name); + int definition_depth = lua_tointeger(L, -1); + if (definition_depth == depth) { + if (is_current_definition(L, definition_name, i, history_array, history_array_size)) { + if (level == highlight_level && index_within_level == highlight_index_within_level) { + draw_highlighted_definition_name(definition_name); + strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN); + } else { + draw_definition_name(definition_name); + } + ++index_within_level; + } + drew_anything = true; + } + lua_pop(L, 1); // depth of value + } + lua_pop(L, 1); // history element + } + y += 2; + if (!drew_anything) break; + level_size[level] = index_within_level; + level++; + } + + // unused functions + mvaddstr(y, 0, " "); + /* no need to level++ because the final iteration above didn't draw anything */ + index_within_level = 0; + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { + const char* definition_name = lua_tostring(L, -2); + if (is_special_history_key(definition_name)) continue; + lua_getglobal(L, definition_name); + int is_function = lua_isfunction(L, -1); + lua_pop(L, 1); + lua_getfield(L, cgt, definition_name); + if (is_function && lua_isnoneornil(L, -1)) { + if (is_current_definition(L, definition_name, i, history_array, history_array_size)) { + if (level == highlight_level && index_within_level == highlight_index_within_level) { + draw_highlighted_definition_name(definition_name); + strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN); + } else { + draw_definition_name(definition_name); + } + ++index_within_level; + } + } + lua_pop(L, 1); // depth of value + } + lua_pop(L, 1); // history element + } + level_size[level] = index_within_level; + int max_level = level; + + lua_settop(L, 0); + render_previous_error(); + + char query[CURRENT_DEFINITION_LEN+1] = {0}; + int qlen = 0; + while (1) { + big_picture_menu(); + for (int x = 0; x < COLS; ++x) + mvaddch(LINES-2, x, ' '); +//? mvprintw(20, 60, "%d %d\n", highlight_level, highlight_index_within_level); + mvprintw(LINES-2, 0, "Edit: %s", query); + int c = getch(); + if (c == KEY_BACKSPACE || c == DELETE || c == CTRL_H) { + if (qlen != 0) query[--qlen] = '\0'; + } else if (c == CTRL_X) { + return; + } else if (c == ENTER) { + if (query[0] != '\0') { + save_to_current_definition_and_editor_buffer(L, query); + int back_to_big_picture = edit_current_definition(L); + if (back_to_big_picture) goto restart; + return; + } + } else if (c == CTRL_U) { + qlen = 0; + query[qlen] = '\0'; + } else if (c == CTRL_R) { + recent_changes_view(L); + goto restart; + } else if (c == KEY_LEFT) { + highlight_index_within_level--; + if (highlight_index_within_level < 0) highlight_index_within_level = 0; + goto restart; + } else if (c == KEY_RIGHT) { + highlight_index_within_level++; + if (highlight_index_within_level >= level_size[highlight_level]) + highlight_index_within_level = level_size[highlight_level]-1; + if (highlight_index_within_level < 0) highlight_index_within_level = 0; + goto restart; + } else if (c == KEY_UP) { + highlight_level--; + if (highlight_level < 0) highlight_level = 0; + if (highlight_index_within_level >= level_size[highlight_level]) + highlight_index_within_level = level_size[highlight_level]-1; + if (highlight_index_within_level < 0) highlight_index_within_level = 0; + goto restart; + } else if (c == KEY_DOWN) { + highlight_level++; + if (highlight_level > max_level) highlight_level = max_level; + if (highlight_index_within_level >= level_size[highlight_level]) + highlight_index_within_level = level_size[highlight_level]-1; + if (highlight_index_within_level < 0) highlight_index_within_level = 0; + goto restart; + } else if (c == CTRL_G) { + save_to_current_definition_and_editor_buffer(L, highlight); + int back_to_big_picture = edit_current_definition(L); + if (back_to_big_picture) goto restart; + return; + } else if (isprint(c)) { + if (qlen < CURRENT_DEFINITION_LEN) { + query[qlen++] = c; + query[qlen] = '\0'; + } + } + } + /* never gets here */ +} + +/* return true if: + * - editor_state exists, and + * - editor_state is applicable to the current image + * Implicitly loads current editor state. */ +int editor_view_in_progress(lua_State* L) { + FILE* in = fopen("teliva_editor_state", "r"); + if (in == NULL) return 0; + int oldtop = lua_gettop(L); + teliva_load_definition(L, in); + int t = lua_gettop(L); + lua_getfield(L, t, "image"); + const char* image_name = lua_tostring(L, -1); + int result = (strcmp(image_name, Image_name) == 0); + lua_pop(L, 1); /* image value */ + lua_setglobal(L, "__teliva_editor_state"); + assert(lua_gettop(L) == oldtop); + return result; +} + +extern int load_editor_buffer_to_current_definition_in_image(lua_State* L); +extern int resumeEdit(lua_State* L); +extern int edit_from(lua_State* L, char* filename, int rowoff, int coloff, int cy, int cx); +int restore_editor_view(lua_State* L) { + lua_getglobal(L, "__teliva_editor_state"); + int editor_state_index = lua_gettop(L); + lua_getfield(L, editor_state_index, "definition"); + const char* definition = lua_tostring(L, -1); + save_to_current_definition_and_editor_buffer(L, definition); + lua_getfield(L, editor_state_index, "rowoff"); + int rowoff = lua_tointeger(L, -1); + lua_getfield(L, editor_state_index, "coloff"); + int coloff = lua_tointeger(L, -1); + lua_getfield(L, editor_state_index, "cy"); + int cy = lua_tointeger(L, -1); + lua_getfield(L, editor_state_index, "cx"); + int cx = lua_tointeger(L, -1); + lua_settop(L, editor_state_index); + int back_to_big_picture = edit_from(L, "teliva_editor_buffer", rowoff, coloff, cy, cx); + // error handling + int oldtop = lua_gettop(L); + while (1) { + int status; + status = load_editor_buffer_to_current_definition_in_image(L); + if (status == 0 || lua_isnil(L, -1)) + break; + Previous_error = lua_tostring(L, -1); + if (Previous_error == NULL) Previous_error = "(error object is not a string)"; + back_to_big_picture = resumeEdit(L); + lua_pop(L, 1); + } + if (lua_gettop(L) != oldtop) { + endwin(); + printf("edit_from: memory leak %d -> %d\n", oldtop, lua_gettop(L)); + exit(1); + } + return back_to_big_picture; +} + +char** Argv = NULL; +extern void cleanup_curses(void); +void developer_mode(lua_State* L) { + /* clobber the app's ncurses colors; we'll restart the app when we rerun it. */ + assume_default_colors(COLOR_FOREGROUND, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_NORMAL, COLOR_FOREGROUND, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_SELECTABLE, COLOR_SELECTABLE_FOREGROUND, COLOR_SELECTABLE_BACKGROUND); + init_pair(COLOR_PAIR_FADE, COLOR_FADE, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_MENU_ALTERNATE, COLOR_MENU_ALTERNATE, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_LUA_COMMENT, COLOR_LUA_COMMENT, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_LUA_KEYWORD, COLOR_LUA_KEYWORD, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_LUA_CONSTANT, COLOR_LUA_CONSTANT, COLOR_BACKGROUND); + init_pair(COLOR_PAIR_MATCH, COLOR_MATCH_FOREGROUND, COLOR_MATCH_BACKGROUND); + init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND); + nodelay(stdscr, 0); /* always make getch() block in developer mode */ + curs_set(1); /* always display cursor in developer mode */ + int switch_to_big_picture_view = 1; + if (editor_view_in_progress(L)) + switch_to_big_picture_view = restore_editor_view(L); + if (switch_to_big_picture_view) + big_picture_view(L); + cleanup_curses(); + execv(Argv[0], Argv); + /* never returns */ +} + +char Current_definition[CURRENT_DEFINITION_LEN+1] = {0}; + +extern int mkstemp(char* template); +extern FILE* fdopen(int fd, const char* mode); +void save_editor_state(int rowoff, int coloff, int cy, int cx) { + if (strlen(Current_definition) == 0) return; + char outfilename[] = "teliva_editor_state_XXXXXX"; + int outfd = mkstemp(outfilename); + if (outfd == -1) { + endwin(); + perror("error in creating temporary file"); + abort(); + } + FILE* out = fdopen(outfd, "w"); + assert(out != NULL); + fprintf(out, "- image: %s\n", Image_name); + fprintf(out, " definition: %s\n", Current_definition); + fprintf(out, " rowoff: %d\n", rowoff); + fprintf(out, " coloff: %d\n", coloff); + fprintf(out, " cy: %d\n", cy); + fprintf(out, " cx: %d\n", cx); + fclose(out); + rename(outfilename, "teliva_editor_state"); +} + +/* when found, return 1 and leave string on top of stack + * when not found, return 0 + * caller is responsible for cleaning up the stack. */ +static int look_up_definition (lua_State* L, const char* name) { + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + /* iterate over mutations in teliva_program history in reverse order */ + int history_array_size = luaL_getn(L, history_array); + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int table = lua_gettop(L); + /* iterate over bindings */ + /* really we expect only one */ + for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { + const char* key = lua_tostring(L, -2); + if (strcmp(key, "__teliva_undo") == 0) { + int next_i = lua_tointeger(L, -1); + assert(next_i < i); + i = next_i + 1; /* account for decrement */ + lua_pop(L, 1); + break; + } + if (is_special_history_key(key)) continue; + if (strcmp(key, name) == 0) + return 1; + } + lua_pop(L, 1); + } + lua_pop(L, 1); + return 0; +} + +void save_to_current_definition_and_editor_buffer(lua_State* L, const char* definition) { + int oldtop = lua_gettop(L); + strncpy(Current_definition, definition, CURRENT_DEFINITION_LEN); + int status = look_up_definition(L, Current_definition); + char outfilename[] = "teliva_editor_buffer_XXXXXX"; + int outfd = mkstemp(outfilename); + if (outfd == -1) { + endwin(); + perror("save_to_current_definition_and_editor_buffer: error in creating temporary file"); + abort(); + } + FILE* out = fdopen(outfd, "w"); + assert(out != NULL); + if (status) + fprintf(out, "%s", lua_tostring(L, -1)); + fclose(out); + rename(outfilename, "teliva_editor_buffer"); + lua_settop(L, oldtop); +} + +/* I don't understand the best way to read all of a text file. + * I'm currently using fread, but its error handling is really designed for + * binary data containing fixed-size records. */ +static void read_editor_buffer(char* out, int capacity) { + FILE* in = fopen("teliva_editor_buffer", "r"); + fread(out, capacity, 1, in); /* TODO: handle overly large file */ + fclose(in); +} + +static void update_definition(lua_State* L, const char* name, char* new_contents) { + int oldtop = lua_gettop(L); + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + /* create a new table containing a single binding */ + lua_createtable(L, /*number of fields per mutation*/2, 0); + lua_pushstring(L, new_contents); + assert(strlen(name) > 0); + lua_setfield(L, -2, name); + /* include timestamp at which binding was created */ + time_t t; + time(&t); + char* time_string = ctime(&t); + lua_pushstring(L, time_string); + lua_setfield(L, -2, "__teliva_timestamp"); + /* append the new table to the history of mutations */ + int history_array_size = luaL_getn(L, history_array); + ++history_array_size; + lua_rawseti(L, history_array, history_array_size); + lua_settop(L, oldtop); +} + +extern void save_tlv(lua_State* L, char* filename); +extern int docall(lua_State* L, int narg, int clear); +extern int load_editor_buffer_to_current_definition_in_image(lua_State* L) { + char new_contents[8192] = {0}; + read_editor_buffer(new_contents, 8190); + update_definition(L, Current_definition, new_contents); + save_tlv(L, Image_name); + /* reload binding */ + return luaL_loadbuffer(L, new_contents, strlen(new_contents), Current_definition) + || docall(L, 0, 1); +} + +/* return true if user chose to back into the big picture view */ +/* But only if there are no errors. Otherwise things can get confusing. */ +extern int edit(lua_State* L, char* filename); +static int edit_current_definition(lua_State* L) { + int back_to_big_picture = edit(L, "teliva_editor_buffer"); + // error handling + int oldtop = lua_gettop(L); + while (1) { + int status; + status = load_editor_buffer_to_current_definition_in_image(L); + if (status == 0 || lua_isnil(L, -1)) + break; + Previous_error = lua_tostring(L, -1); + if (Previous_error == NULL) Previous_error = "(error object is not a string)"; + back_to_big_picture = resumeEdit(L); + lua_pop(L, 1); + } + if (lua_gettop(L) != oldtop) { + endwin(); + printf("edit_current_definition: memory leak %d -> %d\n", oldtop, lua_gettop(L)); + exit(1); + } + return back_to_big_picture; +} + +static void recent_changes_menu(int cursor, int history_array_size) { + attrset(A_REVERSE); + for (int x = 0; x < COLS; ++x) + mvaddch(LINES-1, x, ' '); + attrset(A_NORMAL); + menu_column = 2; + draw_menu_item("^x", "go back"); + /* draw_menu_item("↓|space", "older"); */ + attroff(A_REVERSE); + mvaddstr(LINES-1, menu_column, " ↓"); + attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("|"); + attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("space "); + menu_column += 9; /* strlen isn't sufficient */ + attron(A_REVERSE); + draw_string_on_menu("older"); + /* draw_menu_item("↑|backspace|delete|^h", "newer"); */ + attroff(A_REVERSE); + mvaddstr(LINES-1, menu_column, " ↑"); + attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("|"); + attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("backspace"); + attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("|"); + attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("delete"); + attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("|"); + attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); + addstr("^h "); + menu_column += 23; + attron(A_REVERSE); + draw_string_on_menu("newer"); + draw_menu_item("^e", "edit note"); + if (cursor < history_array_size) + draw_menu_item("^u", "undo everything after this"); + attrset(A_NORMAL); +} + +/* return final y containing text */ +static int render_wrapped_lua_text(int y, int xmin, int xmax, const char* text) { + int x = xmin; + move(y, x); + for (int j = 0; j < strlen(text); ++j) { + char c = text[j]; + if (c == '-' && j+1 < strlen(text) && text[j+1] == '-') + attron(COLOR_PAIR(COLOR_PAIR_LUA_COMMENT)); + if (c != '\n') { + addch(text[j]); + ++x; + if (x >= xmax) { + ++y; + x = xmin; + move(y, x); + } + } + else { + /* newline */ + ++y; + x = xmin; + move(y, x); + attroff(COLOR_PAIR(COLOR_PAIR_LUA_COMMENT)); + } + } + return y; +} + +static void render_recent_changes(lua_State* L, int start_index) { + clear(); + attrset(A_BOLD); + mvaddstr(1, 0, "Recent changes"); + attrset(A_NORMAL); + int oldtop = lua_gettop(L); + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + int history_array_size = luaL_getn(L, history_array); + int y = 3; + attron(A_REVERSE); + for (int i = start_index; i > 0; --i) { + attron(A_BOLD); + mvprintw(y, 0, "%3d. ", i); + attrset(A_NORMAL); + lua_rawgeti(L, history_array, i); + int t = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { + if (strcmp(lua_tostring(L, -2), "__teliva_undo") == 0) { + addstr("undo to "); + attron(A_BOLD); + printw("%d", lua_tointeger(L, -1)); + attroff(A_BOLD); + y++; + continue; + } + const char* definition_name = lua_tostring(L, -2); + if (is_special_history_key(definition_name)) continue; + addstr(definition_name); + /* save timestamp of binding if available */ + lua_getfield(L, t, "__teliva_timestamp"); + if (!lua_isnil(L, -1)) { + char buffer[128] = {0}; + strncpy(buffer, lua_tostring(L, -1), 120); + if (buffer[strlen(buffer)-1] == '\n') + buffer[strlen(buffer)-1] = '\0'; + attron(COLOR_PAIR(COLOR_PAIR_FADE)); + printw(" %s", buffer); + attroff(COLOR_PAIR(COLOR_PAIR_FADE)); + } + lua_pop(L, 1); + lua_getfield(L, t, "__teliva_note"); + if (!lua_isnil(L, -1)) { + attron(COLOR_PAIR(COLOR_PAIR_FADE)); + printw(" -- %s", lua_tostring(L, -1)); + attroff(COLOR_PAIR(COLOR_PAIR_FADE)); + } + lua_pop(L, 1); + y++; + const char* definition_contents = lua_tostring(L, -1); + y = render_wrapped_lua_text(y, 0, COLS, definition_contents); + y++; + if (y >= LINES-1) break; /* leave cruft on the stack */ + } + lua_settop(L, t); /* clean up cruft on the stack */ + lua_pop(L, 1); // history element + y++; + if (y >= LINES-1) break; + } + lua_pop(L, 1); // history array + if (lua_gettop(L) != oldtop) { + endwin(); + printf("render_recent_changes: memory leak %d -> %d\n", oldtop, lua_gettop(L)); + exit(1); + } + recent_changes_menu(start_index, history_array_size); + refresh(); +} + +static void add_undo_event(lua_State* L, int cursor) { + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + /* create a new table containing the undo event */ + lua_createtable(L, /*number of fields per mutation*/2, 0); + lua_pushinteger(L, cursor); + lua_setfield(L, -2, "__teliva_undo"); + /* include timestamp at which event was created */ + time_t t; + time(&t); + char* time_string = ctime(&t); + lua_pushstring(L, time_string); + lua_setfield(L, -2, "__teliva_timestamp"); + /* append the new table to the history of mutations */ + int history_array_size = luaL_getn(L, history_array); + ++history_array_size; + lua_rawseti(L, history_array, history_array_size); + /* clean up */ + lua_pop(L, 1); +} + +static void save_note_to_editor_buffer(lua_State* L, int cursor) { + lua_getglobal(L, "teliva_program"); + lua_rawgeti(L, -1, cursor); + lua_getfield(L, -1, "__teliva_note"); + const char* contents = lua_tostring(L, -1); + char outfilename[] = "teliva_editor_buffer_XXXXXX"; + int outfd = mkstemp(outfilename); + if (outfd == -1) { + endwin(); + perror("save_note_to_editor_buffer: error in creating temporary file"); + abort(); + } + FILE* out = fdopen(outfd, "w"); + assert(out != NULL); + if (contents != NULL) + fprintf(out, "%s", contents); + fclose(out); + rename(outfilename, "teliva_editor_buffer"); + lua_pop(L, 3); /* contents, table at cursor, teliva_program */ +} + +static void load_note_from_editor_buffer(lua_State* L, int cursor) { + lua_getglobal(L, "teliva_program"); + char new_contents[8192] = {0}; + read_editor_buffer(new_contents, 8190); + lua_rawgeti(L, -1, cursor); + lua_pushstring(L, new_contents); + lua_setfield(L, -2, "__teliva_note"); + lua_pop(L, 2); /* table at cursor, teliva_program */ +} + +static void recent_changes_view(lua_State* L) { + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + assert(history_array == 1); + int history_array_size = luaL_getn(L, history_array); + int cursor = history_array_size; + lua_pop(L, 1); + int quit = 0; + while (!quit) { + /* refresh state after each operation so we pick up modifications */ + render_recent_changes(L, cursor); + int c = getch(); + switch (c) { + case CTRL_X: + quit = 1; + break; + case KEY_DOWN: + case ' ': + if (cursor > 1) --cursor; + break; + case KEY_UP: + case KEY_BACKSPACE: + case DELETE: + case CTRL_H: + if (cursor < history_array_size) ++cursor; + break; + case CTRL_E: + save_note_to_editor_buffer(L, cursor); + /* big picture hotkey unnecessarily available here */ + /* TODO: go hotkey is misleading. edits will not be persisted until you return to recent changes */ + edit(L, "teliva_editor_buffer"); + load_note_from_editor_buffer(L, cursor); + save_tlv(L, Image_name); + break; + case CTRL_U: + if (cursor < history_array_size) { + add_undo_event(L, cursor); + save_tlv(L, Image_name); + } + break; + } + } +} + +static int binding_exists (lua_State *L, const char *name) { + int result = 0; + lua_getglobal(L, name); + result = !lua_isnil(L, -1); + lua_pop(L, 1); + return result; +} + +extern int dostring(lua_State* L, const char* s, const char* name); +static int load_definitions(lua_State* L) { + int status; + lua_getglobal(L, "teliva_program"); + int history_array = lua_gettop(L); + /* iterate over mutations in teliva_program history in reverse order */ + int history_array_size = luaL_getn(L, history_array); + for (int i = history_array_size; i > 0; --i) { + lua_rawgeti(L, history_array, i); + int table = lua_gettop(L); + /* iterate over bindings */ + /* really we expect only one */ + for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { + const char* key = lua_tostring(L, -2); + if (strcmp(key, "__teliva_undo") == 0) { + int next_i = lua_tointeger(L, -1); + assert(next_i < i); + i = next_i + 1; /* account for decrement */ + lua_pop(L, 1); + break; + } + if (is_special_history_key(key)) continue; + if (binding_exists(L, key)) + continue; // most recent binding trumps older ones + const char* value = lua_tostring(L, -1); + status = dostring(L, value, key); + if (status != 0) return report_in_developer_mode(L, status); + } + lua_pop(L, 1); + } + lua_pop(L, 1); + return 0; +} + +static int run_tests(lua_State* L) { + clear(); + lua_pushinteger(L, 0); + lua_setglobal(L, "teliva_num_test_failures"); + lua_pushnil(L); + lua_setglobal(L, "teliva_first_failure"); + lua_pushvalue(L, LUA_GLOBALSINDEX); + int table = lua_gettop(L); + for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { + const char* key = lua_tostring(L, -2); + if (strncmp("test_", key, strlen("test_")) != 0) continue; + if (!lua_isfunction(L, -1)) continue; + int status = lua_pcall(L, 0, 0, 0); + if (status) { + printw("E%d: %s", status, lua_tostring(L, -1)); + /* increment teliva_num_test_failures */ + lua_getglobal(L, "teliva_num_test_failures"); + int num_failures = lua_tointeger(L, -1); + lua_pop(L, 1); + lua_pushinteger(L, num_failures+1); + lua_setglobal(L, "teliva_num_test_failures"); + /* if unset, set teliva_first_failure */ + lua_getglobal(L, "teliva_first_failure"); + int first_failure_clear = lua_isnil(L, -1); + lua_pop(L, 1); + if (first_failure_clear) + lua_setglobal(L, "teliva_first_failure"); + } + lua_pushnil(L); /* just to undo loop update */ + } + lua_pop(L, 1); + lua_getglobal(L, "teliva_num_test_failures"); + int num_failures = lua_tointeger(L, -1); + lua_pop(L, 1); + if (num_failures == 0) return 0; + if (num_failures == 1) + addstr("1 failure"); + else + printw("%d failures", num_failures); + getch(); + /* take first failure back to developer mode */ + lua_getglobal(L, "teliva_first_failure"); + assert(!lua_isnil(L, -1)); + return 1; +} + +static void clear_call_graph(lua_State* L) { + int oldtop = lua_gettop(L); + luaL_newmetatable(L, "__teliva_call_graph_depth"); + int cgt = lua_gettop(L); + lua_pushnil(L); + while (lua_next(L, cgt) != 0) { + lua_pop(L, 1); /* old value */ + lua_pushvalue(L, -1); /* duplicate key */ + lua_pushnil(L); /* new value */ + lua_settable(L, cgt); + /* one copy of key left for lua_next */ + } + lua_pop(L, 1); + assert(lua_gettop(L) == oldtop); +} + + +char* Image_name = NULL; +extern void set_args (lua_State *L, char **argv, int n); +extern void load_tlv(lua_State* L, char* filename); +int handle_image(lua_State* L, char** argv, int n) { + int status; + set_args(L, argv, n); + /* parse and load file contents (teliva_program array) */ + Image_name = argv[n]; + load_tlv(L, Image_name); +//? save_tlv(L, Image_name); // manual test; should always return identical result, modulo key order +//? exit(1); + status = load_definitions(L); + if (status != 0) return 0; + status = run_tests(L); + if (status != 0) return report_in_developer_mode(L, status); + /* clear callgraph stats from running tests */ + clear_call_graph(L); + /* call main() */ + lua_getglobal(L, "main"); + status = docall(L, 0, 1); + if (status != 0) return report_in_developer_mode(L, status); + return 0; +} |