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ascii/main.cpp

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13 KiB
C++
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#include "ascii.h"
#include <stdio.h>
#include <string>
#include <list>
std::list<std::string> code;
int current_editor = 0;
void init_terminal();
void do_terminal();
void init_code_editor();
void do_code_editor();
void save_code();
void loop() {
if (btnp(KEY_TAB)) {
current_editor = (++current_editor)%2;
switch(current_editor) {
case 0:
init_terminal();
break;
case 1:
init_code_editor();
break;
}
}
switch(current_editor) {
case 0:
do_terminal();
break;
case 1:
do_code_editor();
break;
}
}
void execute_run() {
if (current_editor == 1) save_code();
}
uint8_t get_char(uint8_t key) {
SDL_Keymod mods = SDL_GetModState();
if (key != KEY_UNKNOWN) {
if (key < 30) {
if ((mods & KMOD_SHIFT) || (mods & KMOD_CAPS)) {
return key+61;
} else {
return key+93;
}
}
else if (key == KEY_0) { if (mods & KMOD_SHIFT) { return '='; } else { return '0'; } }
else if (key == KEY_1) { if (mods & KMOD_SHIFT) { return '!'; } else if (mods & KMOD_RALT) { return '|'; } else { return '1'; } }
else if (key == KEY_2) { if (mods & KMOD_SHIFT) { return '"'; } else if (mods & KMOD_RALT) { return '@'; } else { return '2'; } }
else if (key == KEY_3) { if (mods & KMOD_SHIFT) { return 144; } else if (mods & KMOD_RALT) { return '#'; } else { return '3'; } }
else if (key == KEY_4) { if (mods & KMOD_SHIFT) { return '$'; } else if (mods & KMOD_RALT) { return '~'; } else { return '4'; } }
else if (key == KEY_5) { if (mods & KMOD_SHIFT) { return '%'; } else if (mods & KMOD_RALT) { return 180; } else { return '5'; } }
else if (key == KEY_6) { if (mods & KMOD_SHIFT) { return '&'; } else if (mods & KMOD_RALT) { return 173; } else { return '6'; } }
else if (key == KEY_7) { if (mods & KMOD_SHIFT) { return '/'; } else { return '7'; } }
else if (key == KEY_8) { if (mods & KMOD_SHIFT) { return '('; } else { return '8'; } }
else if (key == KEY_9) { if (mods & KMOD_SHIFT) { return ')'; } else { return '9'; } }
else if (key == KEY_SPACE) return 32;
else if (key == KEY_MINUS) { if (mods & KMOD_SHIFT) { return '?'; } else { return '\''; } }
else if (key == KEY_EQUALS) { if (mods & KMOD_SHIFT) { return 174; } else { return 175; } }
else if (key == KEY_COMMA) { if (mods & KMOD_SHIFT) { return ';'; } else { return ','; } }
else if (key == KEY_PERIOD) { if (mods & KMOD_SHIFT) { return ':'; } else { return '.'; } }
else if (key == KEY_SLASH) { if (mods & KMOD_SHIFT) { return '_'; } else { return '-'; } }
else if (key == KEY_LEFTBRACKET) { if (mods & KMOD_SHIFT) { return 160; } else if (mods & KMOD_RALT) { return '['; } else { return 96; } }
else if (key == KEY_RIGHTBRACKET) { if (mods & KMOD_SHIFT) { return '*'; } else if (mods & KMOD_RALT) { return ']'; } else { return '+'; } }
else if (key == KEY_APOSTROPHE) { if (mods & KMOD_SHIFT) { return 162; } else if (mods & KMOD_RALT) { return '{'; } else { return 161; } }
else if (key == KEY_BACKSLASH) { if (mods & KMOD_SHIFT) { return 'C'; } else if (mods & KMOD_RALT) { return '}'; } else { return 'c'; } }
else if (key == KEY_GRAVE) { if (mods & KMOD_SHIFT) { return '>'; } else { return '<'; } }
else if (key == KEY_NONUSBACKSLASH) { if (mods & KMOD_SHIFT) { return 164; } else if (mods & KMOD_RALT) { return '\\'; } else { return 163; } }
else return 0;
} else {
return 0;
}
}
void init_terminal() {
mode(0);
cls();
}
void do_terminal() {
//SDL_Keymod mods = SDL_GetModState();
const uint8_t key = whichbtn();
if (key != KEY_UNKNOWN) {
if (key == KEY_RETURN or key == KEY_KP_ENTER) debug_get_cmd();
else if (key == KEY_UP) next_cmd();
else if (key == KEY_DOWN) prev_cmd();
else if (key == KEY_BACKSPACE) debugchr(8);
else {
uint8_t chr = get_char(key);
if (chr != 0) debugchr(chr);
}
}
}
void save_code() {
const char* file = get_filename();
FILE *f = fopen(file, "w");
for (std::list<std::string>::iterator it = code.begin(); it != code.end(); it++) {
fprintf(f, "%s\n", (*it).c_str());
}
fclose(f);
}
void load_code() {
const char* file = get_filename();
FILE *f = fopen(file, "rb");
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET); /* same as rewind(f); */
char *buffer = (char*)malloc(fsize + 1);
fread(buffer, 1, fsize, f);
fclose(f);
buffer[fsize] = 0;
int start = 0;
for (int pos=0;pos<fsize;++pos) {
if (buffer[pos] == '\n') {
buffer[pos]='\0';
code.push_back(&buffer[start]);
start=pos+1;
} else if (buffer[pos] == '\r') {
buffer[pos]='\0';
code.push_back(&buffer[start]);
start=pos+1;
if (buffer[start] == '\n') {pos++; start++;}
}
}
free(buffer);
}
std::list<std::string>::iterator ls[28];
static int col = 0;
static int line = 0;
bool cursor_inverted = false;
int blink_wait = 30;
#define PARSER_NOTHING 0
#define PARSER_NUMBER 1
#define PARSER_IDENTIFIER 2
#define PARSER_STRING 3
#define PARSER_COMMENT 4
#define PARSER_FUNCTION 5
uint16_t parser_offset = 0;
uint8_t parser_pos = 0;
uint8_t parser_start=0;
void parser_setup(uint16_t address) {
parser_offset = address;
parser_pos = 0;
parser_start = 0;
}
const uint8_t parser_get_char(uint8_t offset=0) {
if ((parser_pos+offset) >= 80) return 0;
return peek(parser_offset+parser_pos+offset);
}
char alpha[80] = "";
uint8_t alpha_pos = 0;
void parser_next(const bool keep=false) {
if (keep) { alpha[alpha_pos++] = parser_get_char(); alpha[alpha_pos]=0; } else { alpha[0]=alpha_pos=0; }
if (parser_pos < 80) parser_pos++;
}
#define ISZERO (parser_get_char()=='0')
#define ISX (parser_get_char()=='z' || parser_get_char()=='Z')
#define ISDIGIT (parser_get_char()>='0' && parser_get_char() <='9')
#define WILLBEDIGIT (parser_get_char(1)>='0' && parser_get_char(1) <='9')
#define ISPOINT (parser_get_char()=='.')
#define ISALPHA (parser_get_char()>='_' || (parser_get_char()>='a' && parser_get_char()<='z') || (parser_get_char()>='A' && parser_get_char()<='Z'))
#define ISQUOTES (parser_get_char()=='"' || parser_get_char()=='\'')
#define ISMINUS (parser_get_char()=='-')
#define WILLBEMINUS (parser_get_char(1)=='-')
#define ISPAREN (parser_get_char()=='(')
#define ENDED (parser_get_char()==0)
const char* keywords[] = { "and", "break", "do", "else", "elseif", "end", "false", "for", "function", "goto", "if", "in", "local", "nil", "not", "or", "repeat", "return", "then", "true", "until", "while" };
const bool is_keyword() {
for (int i=0;i<22;++i) if (strcmp(alpha, keywords[i]) == 0) return true;
return false;
}
void parser_do_color(uint8_t type) {
uint8_t color = COLOR_WHITE;
switch (type) {
case PARSER_NUMBER: color = COLOR_LIGHT_GREEN; break;
case PARSER_COMMENT: color = COLOR_LIGHT_GRAY; break;
case PARSER_STRING: color = COLOR_RED; break;
case PARSER_IDENTIFIER: if (is_keyword()) color = COLOR_MAGENTA; break;
case PARSER_FUNCTION: color = COLOR_YELLOW; break;
};
color = (color&0x0f)+(0x10);
for (int i=parser_start;i<parser_pos;++i) poke(0x1200+parser_offset+i, color);
parser_start = parser_pos;
}
void refresh_line_color(uint8_t line) {
parser_setup(80*(line+1));
while (!ENDED) {
uint8_t result = PARSER_NOTHING;
if (ISZERO) {
result=PARSER_NUMBER; parser_next();
if (ISX) {
if (WILLBEDIGIT) {
parser_next();
while (ISDIGIT) parser_next();
}
} else if (ISDIGIT) {
while (ISDIGIT) parser_next();
if (ISPOINT) {
parser_next();
while (ISDIGIT) parser_next();
}
} else if (ISPOINT) {
parser_next();
while (ISDIGIT) parser_next();
}
} else if (ISDIGIT) {
result = PARSER_NUMBER;
while (ISDIGIT) parser_next();
if (ISPOINT) {
parser_next();
while (ISDIGIT) parser_next();
}
} else if (ISALPHA) {
result = PARSER_IDENTIFIER;
while (ISALPHA || ISDIGIT) parser_next(true);
if (ISPAREN) result = PARSER_FUNCTION;
} else if (ISQUOTES) {
result = PARSER_STRING; parser_next();
while (!ISQUOTES && !ENDED) parser_next();
parser_next();
} else if (ISMINUS) {
if (WILLBEMINUS) {
result = PARSER_COMMENT;
while (!ENDED) parser_next();
}
}
if (result == PARSER_NOTHING) parser_next();
parser_do_color(result);
}
}
void refresh_color_highlight() {
cursor_inverted = false;
for (int i=0;i<28;++i) refresh_line_color(i);
}
void refresh_code_editor() {
color(COLOR_WHITE, COLOR_BLUE);
cls();
color(COLOR_BLACK, COLOR_LIGHT_GRAY);
print(" File Edit Run ",0,0);
print(" ",0,29);
color(COLOR_WHITE, COLOR_BLUE);
std::list<std::string>::iterator it = code.begin();
int i=0;
while (it != code.end() && i<28) {
ls[i] = it;
print((*it).c_str(), 0, i+1);
++i; ++it;
}
refresh_color_highlight();
}
void init_code_editor() {
mode(3);
code.clear();
load_code();
refresh_code_editor();
}
std::string get_current_line() {
return *ls[line];
}
void invert_cursor() {
cursor_inverted = !cursor_inverted;
uint16_t pos = 0x1200 + col + (line+1)*80;
uint8_t col = peek(pos);
poke(pos, ((col >> 4) & 0x0f) + ((col << 4) & 0xf0) );
}
void move_cursor_up() {
if (line > 0) {
if (cursor_inverted) invert_cursor();
line--;
if (get_current_line().size() < col) col = get_current_line().size();
blink_wait=1;
}
}
void move_cursor_down() {
if (line < code.size()-1) {
if (cursor_inverted) invert_cursor();
line++;
if (get_current_line().size() < col) col = get_current_line().size();
blink_wait=1;
}
}
void move_cursor_right() {
if ( col < get_current_line().size() ) {
if (cursor_inverted) invert_cursor();
col++;
blink_wait=1;
} else {
if (line < code.size()-1) {
col = 0;
move_cursor_down();
}
}
}
void move_cursor_left() {
if (col > 0) {
if (cursor_inverted) invert_cursor();
col--;
blink_wait=1;
} else {
if (line > 0) {
move_cursor_up();
col = get_current_line().size();
}
}
}
void move_line_end() {
if (cursor_inverted) invert_cursor();
col = get_current_line().size();
blink_wait=1;
}
void move_line_home() {
if (cursor_inverted) invert_cursor();
col = 0;
blink_wait=1;
}
void split_line() {
std::string str = get_current_line();
*ls[line] = str.substr(col);
std::list<std::string>::iterator newline = ls[line]++;
code.insert(newline, str.substr(0, col));
if (cursor_inverted) invert_cursor();
line++; col=0;
blink_wait=1;
refresh_code_editor();
}
void join_lines() {
if (cursor_inverted) invert_cursor();
std::string str = get_current_line();
//std::list<std::string>::iterator prevline = ls[line]--;
code.erase(ls[line]);
line--;
const int line_size = (*ls[line]).size();
*ls[line] += str;
col = line_size;
blink_wait=1;
refresh_code_editor();
}
void delete_char() {
if (col == 0) {
if (line > 0) join_lines();
} else {
if (cursor_inverted) invert_cursor();
std::string str = get_current_line();
std::string a = str.substr(0,col-1);
std::string b = str.substr(col);
*ls[line] = a+b;
col--;
blink_wait=1;
refresh_code_editor();
}
}
void supr_char() {
if ((col == (*ls[line]).size()) && (line == code.size()-1)) return;
move_cursor_right();
delete_char();
}
void add_char(uint8_t chr) {
std::string str = get_current_line();
std::string a = str.substr(0,col);
std::string b = str.substr(col);
std::string c = " "; c[0] = chr;
*ls[line] = a+c+b;
col++;
blink_wait=1;
refresh_code_editor();
}
void do_code_editor() {
const uint8_t key = whichbtn();
if (key != KEY_UNKNOWN) {
if (key == KEY_RETURN or key == KEY_KP_ENTER) {
split_line();
}
else if (key == KEY_UP) move_cursor_up();
else if (key == KEY_DOWN) move_cursor_down();
else if (key == KEY_LEFT) move_cursor_left();
else if (key == KEY_RIGHT) move_cursor_right();
else if (key == KEY_BACKSPACE) delete_char();
else if (key == KEY_DELETE) supr_char();
else if (key == KEY_END) move_line_end();
else if (key == KEY_HOME) move_line_home();
else {
uint8_t chr = get_char(key);
if (chr != 0) add_char(chr);
}
}
blink_wait--;
if (blink_wait == 0) {
blink_wait = 30;
invert_cursor();
}
}
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