kolibrios-gitea/programs/other/tte/tte.c
maxcodehack 751768c3c2 Fix '-v' option
git-svn-id: svn://kolibrios.org@8393 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-12-13 14:33:14 +00:00

1834 lines
59 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Copyright (C) 2017 Daniel Morales
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Kolibri port by Siemargl 2018 and update by maxcodehack 2020
* my fixes mostly commented with triple comment ///
*/
/*** Include section ***/
// We add them above our includes, because the header
// files we are including use the macros to decide what
// features to expose. These macros remove some compilation
// warnings. See
// https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
// for more info.
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#define _GNU_SOURCE
#include <ctype.h>
#include <errno.h>
///#include <fcntl.h>
///#include <signal.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
///#include <sys/ioctl.h>
///#include <sys/types.h>
///#include <termios.h>
#include <time.h>
///#include <unistd.h>
#ifdef TCC_BUILD
#include <conio.h>
#endif
#ifdef GCC_BUILD
#include "console_obj.h"
#endif
/// Notify
void notify(char *text);
/*** Define section ***/
// This mimics the Ctrl + whatever behavior, setting the
// 3 upper bits of the character pressed to 0.
///#define CTRL_KEY(k) ((k) & 0x1f)
// Siemargl - set top 4 bits
#define CTRL_KEY(k) ((k) | 0xf000)
// Empty buffer
#define ABUF_INIT {NULL, 0}
// Version code
#define TTE_VERSION "0.0.5"
// Length of a tab stop
#define TTE_TAB_STOP 4
// Times to press Ctrl-Q before exiting
#define TTE_QUIT_TIMES 2
// Highlight flags
#define HL_HIGHLIGHT_NUMBERS (1 << 0)
#define HL_HIGHLIGHT_STRINGS (1 << 1)
/*** Data section ***/
// Kolibri defaults
int con_def_wnd_width = 80;
int con_def_wnd_height = 25;
/// winFile support
int fileIsOd0a;
typedef struct editor_row {
int idx; // Row own index within the file.
int size; // Size of the content (excluding NULL term)
int render_size; // Size of the rendered content
char* chars; // Row content
char* render; // Row content "rendered" for screen (for TABs).
unsigned char* highlight; // This will tell you if a character is part of a string, comment, number...
int hl_open_comment; // True if the line is part of a ML comment.
} editor_row;
struct editor_syntax {
// file_type field is the name of the filetype that will be displayed
// to the user in the status bar.
char* file_type;
// file_match is an array of strings, where each string contains a
// pattern to match a filename against. If the filename matches,
// then the file will be recognized as having that filetype.
char** file_match;
// This will be a NULL-terminated array of strings, each string containing
// a keyword. To differentiate between the two types of keywords,
// we'll terminate the second type of keywords with a pipe (|)
// character (also known as a vertical bar).
char** keywords;
// We let each language specify its own single-line comment pattern.
char* singleline_comment_start;
// flags is a bit field that will contain flags for whether to
// highlight numbers and whether to highlight strings for that
// filetype.
char* multiline_comment_start;
char* multiline_comment_end;
int flags;
};
struct editor_config {
int cursor_x;
int cursor_y;
int render_x;
int row_offset; // Offset of row displayed.
int col_offset; // Offset of col displayed.
int screen_rows; // Number of rows that we can show
int screen_cols; // Number of cols that we can show
int num_rows; // Number of rows
editor_row* row;
int dirty; // To know if a file has been modified since opening.
char* file_name;
char status_msg[80];
time_t status_msg_time;
char* copied_char_buffer;
struct editor_syntax* syntax;
/// struct termios orig_termios;
} ec;
// Having a dynamic buffer will allow us to write only one
// time once the screen is refreshing, instead of doing
// a lot of write's.
struct a_buf {
char* buf;
int len;
};
enum editor_key {
/// BACKSPACE = 0x7f, // 127
BACKSPACE = 0x3e7, // fixed russian letter
ARROW_LEFT = 0x3e8, // 1000, large value out of the range of a char.
ARROW_RIGHT,
ARROW_UP,
ARROW_DOWN,
PAGE_UP,
PAGE_DOWN,
HOME_KEY,
END_KEY,
DEL_KEY
};
enum editor_highlight {
HL_NORMAL = 0,
HL_SL_COMMENT,
HL_ML_COMMENT,
HL_KEYWORD_1,
HL_KEYWORD_2,
HL_STRING,
HL_NUMBER,
HL_MATCH
};
/*** Filetypes ***/
char* C_HL_extensions[] = {".c", ".h", ".cpp", ".hpp", ".cc", NULL}; // Array must be terminated with NULL.
char* JAVA_HL_extensions[] = {".java", NULL};
char* PYTHON_HL_extensions[] = {".py", NULL};
char* BASH_HL_extensions[] = {".sh", NULL};
char* JS_HL_extensions[] = {".js", ".jsx", NULL};
char* PHP_HL_extensions[] = {".php", NULL};
char* JSON_HL_extensions[] = {".json", ".jsonp", NULL};
char* XML_HL_extensions[] = {".xml", NULL};
char* SQL_HL_extensions[] = {".sql", NULL};
char* RUBY_HL_extensions[] = {".rb", NULL};
char* C_HL_keywords[] = {
"switch", "if", "while", "for", "break", "continue", "return", "else",
"struct", "union", "typedef", "static", "enum", "class", "case", "#include",
"volatile", "register", "sizeof", "typedef", "union", "goto", "const", "auto",
"#define", "#if", "#endif", "#error", "#ifdef", "#ifndef", "#undef",
"int|", "long|", "double|", "float|", "char|", "unsigned|", "signed|",
"void|", "bool|", NULL
};
char* JAVA_HL_keywords[] = {
"switch", "if", "while", "for", "break", "continue", "return", "else",
"in", "public", "private", "protected", "static", "final", "abstract",
"enum", "class", "case", "try", "catch", "do", "extends", "implements",
"finally", "import", "instanceof", "interface", "new", "package", "super",
"native", "strictfp",
"synchronized", "this", "throw", "throws", "transient", "volatile",
"byte|", "char|", "double|", "float|", "int|", "long|", "short|",
"boolean|", NULL
};
char* PYTHON_HL_keywords[] = {
"and", "as", "assert", "break", "class", "continue", "def", "del", "elif",
"else", "except", "exec", "finally", "for", "from", "global", "if", "import",
"in", "is", "lambda", "not", "or", "pass", "print", "raise", "return", "try",
"while", "with", "yield",
"buffer|", "bytearray|", "complex|", "False|", "float|", "frozenset|", "int|",
"list|", "long|", "None|", "set|", "str|", "tuple|", "True|", "type|",
"unicode|", "xrange|", NULL
};
char* BASH_HL_keywords[] = {
"case", "do", "done", "elif", "else", "esac", "fi", "for", "function", "if",
"in", "select", "then", "time", "until", "while", "alias", "bg", "bind", "break",
"builtin", "cd", "command", "continue", "declare", "dirs", "disown", "echo",
"enable", "eval", "exec", "exit", "export", "fc", "fg", "getopts", "hash", "help",
"history", "jobs", "kill", "let", "local", "logout", "popd", "pushd", "pwd", "read",
"readonly", "return", "set", "shift", "suspend", "test", "times", "trap", "type",
"typeset", "ulimit", "umask", "unalias", "unset", "wait", "printf", NULL
};
char* JS_HL_keywords[] = {
"break", "case", "catch", "class", "const", "continue", "debugger", "default",
"delete", "do", "else", "enum", "export", "extends", "finally", "for", "function",
"if", "implements", "import", "in", "instanceof", "interface", "let", "new",
"package", "private", "protected", "public", "return", "static", "super", "switch",
"this", "throw", "try", "typeof", "var", "void", "while", "with", "yield", "true",
"false", "null", "NaN", "global", "window", "prototype", "constructor", "document",
"isNaN", "arguments", "undefined",
"Infinity|", "Array|", "Object|", "Number|", "String|", "Boolean|", "Function|",
"ArrayBuffer|", "DataView|", "Float32Array|", "Float64Array|", "Int8Array|",
"Int16Array|", "Int32Array|", "Uint8Array|", "Uint8ClampedArray|", "Uint32Array|",
"Date|", "Error|", "Map|", "RegExp|", "Symbol|", "WeakMap|", "WeakSet|", "Set|", NULL
};
char* PHP_HL_keywords[] = {
"__halt_compiler", "break", "clone", "die", "empty", "endswitch", "final", "global",
"include_once", "list", "private", "return", "try", "xor", "abstract", "callable",
"const", "do", "enddeclare", "endwhile", "finally", "goto", "instanceof", "namespace",
"protected", "static", "unset", "yield", "and", "case", "continue", "echo", "endfor",
"eval", "for", "if", "insteadof", "new", "public", "switch", "use", "array", "catch",
"declare", "else", "endforeach", "exit", "foreach", "implements", "interface", "or",
"require", "throw", "var", "as", "class", "default", "elseif", "endif", "extends",
"function", "include", "isset", "print", "require_once", "trait", "while", NULL
};
char* JSON_HL_keywords[] = {
NULL
};
char* XML_HL_keywords[] = {
NULL
};
char* SQL_HL_keywords[] = {
"SELECT", "FROM", "DROP", "CREATE", "TABLE", "DEFAULT", "FOREIGN", "UPDATE", "LOCK",
"INSERT", "INTO", "VALUES", "LOCK", "UNLOCK", "WHERE", "DINSTINCT", "BETWEEN", "NOT",
"NULL", "TO", "ON", "ORDER", "GROUP", "IF", "BY", "HAVING", "USING", "UNION", "UNIQUE",
"AUTO_INCREMENT", "LIKE", "WITH", "INNER", "OUTER", "JOIN", "COLUMN", "DATABASE", "EXISTS",
"NATURAL", "LIMIT", "UNSIGNED", "MAX", "MIN", "PRECISION", "ALTER", "DELETE", "CASCADE",
"PRIMARY", "KEY", "CONSTRAINT", "ENGINE", "CHARSET", "REFERENCES", "WRITE",
"BIT|", "TINYINT|", "BOOL|", "BOOLEAN|", "SMALLINT|", "MEDIUMINT|", "INT|", "INTEGER|",
"BIGINT|", "DOUBLE|", "DECIMAL|", "DEC|" "FLOAT|", "DATE|", "DATETIME|", "TIMESTAMP|",
"TIME|", "YEAR|", "CHAR|", "VARCHAR|", "TEXT|", "ENUM|", "SET|", "BLOB|", "VARBINARY|",
"TINYBLOB|", "TINYTEXT|", "MEDIUMBLOB|", "MEDIUMTEXT|", "LONGTEXT|",
"select", "from", "drop", "create", "table", "default", "foreign", "update", "lock",
"insert", "into", "values", "lock", "unlock", "where", "dinstinct", "between", "not",
"null", "to", "on", "order", "group", "if", "by", "having", "using", "union", "unique",
"auto_increment", "like", "with", "inner", "outer", "join", "column", "database", "exists",
"natural", "limit", "unsigned", "max", "min", "precision", "alter", "delete", "cascade",
"primary", "key", "constraint", "engine", "charset", "references", "write",
"bit|", "tinyint|", "bool|", "boolean|", "smallint|", "mediumint|", "int|", "integer|",
"bigint|", "double|", "decimal|", "dec|" "float|", "date|", "datetime|", "timestamp|",
"time|", "year|", "char|", "varchar|", "text|", "enum|", "set|", "blob|", "varbinary|",
"tinyblob|", "tinytext|", "mediumblob|", "mediumtext|", "longtext|", NULL
};
char* RUBY_HL_keywords[] = {
"__ENCODING__", "__LINE__", "__FILE__", "BEGIN", "END", "alias", "and", "begin", "break",
"case", "class", "def", "defined?", "do", "else", "elsif", "end", "ensure", "for", "if",
"in", "module", "next", "not", "or", "redo", "rescue", "retry", "return", "self", "super",
"then", "undef", "unless", "until", "when", "while", "yield", NULL
};
struct editor_syntax HL_DB[] = {
{
"c",
C_HL_extensions,
C_HL_keywords,
"//",
"/*",
"*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"java",
JAVA_HL_extensions,
JAVA_HL_keywords,
"//",
"/*",
"*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"python",
PYTHON_HL_extensions,
PYTHON_HL_keywords,
"#",
"'''",
"'''",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"bash",
BASH_HL_extensions,
BASH_HL_keywords,
"#",
NULL,
NULL,
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"js",
JS_HL_extensions,
JS_HL_keywords,
"//",
"/*",
"*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"php",
PHP_HL_extensions,
PHP_HL_keywords,
"//",
"/*",
"*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"json",
JSON_HL_extensions,
JSON_HL_keywords,
NULL,
NULL,
NULL,
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"xml",
XML_HL_extensions,
XML_HL_keywords,
NULL,
NULL,
NULL,
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"sql",
SQL_HL_extensions,
SQL_HL_keywords,
"--",
"/*",
"*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
{
"ruby",
RUBY_HL_extensions,
RUBY_HL_keywords,
"#",
"=begin",
"=end",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
}
};
// Size of the "Hightlight Database" (HL_DB).
#define HL_DB_ENTRIES (sizeof(HL_DB) / sizeof(HL_DB[0]))
/*** Declarations section ***/
void editorClearScreen();
void editorRefreshScreen();
void editorSetStatusMessage(const char* msg, ...);
void consoleBufferOpen();
void abufFree();
void abufAppend();
char *editorPrompt(char* prompt, void (*callback)(char*, int));
void editorRowAppendString(editor_row* row, char* s, size_t len);
void editorInsertNewline();
/*** Terminal section ***/
void die(const char* s) {
editorClearScreen();
// perror looks for global errno variable and then prints
// a descriptive error mesage for it.
perror(s);
printf("\r\n");
con_exit(0); /// KOS console
exit(1);
}
void disableRawMode() {
/// if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &ec.orig_termios) == -1)
/// die("Failed to disable raw mode");
}
void enableRawMode() {
// Save original terminal state into orig_termios.
/// if (tcgetattr(STDIN_FILENO, &ec.orig_termios) == -1)
/// die("Failed to get current terminal state");
// At exit, restore the original state.
/// atexit(disableRawMode);
///
/*
// Modify the original state to enter in raw mode.
struct termios raw = ec.orig_termios;
// This disables Ctrl-M, Ctrl-S and Ctrl-Q commands.
// (BRKINT, INPCK and ISTRIP are not estrictly mandatory,
// but it is recommended to turn them off in case any
// system needs it).
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
// Turning off all output processing (\r\n).
raw.c_oflag &= ~(OPOST);
// Setting character size to 8 bits per byte (it should be
// like that on most systems, but whatever).
raw.c_cflag |= (CS8);
// Using NOT operator on ECHO | ICANON | IEXTEN | ISIG and
// then bitwise-AND them with flags field in order to
// force c_lflag 4th bit to become 0. This disables
// chars being printed (ECHO) and let us turn off
// canonical mode in order to read input byte-by-byte
// instead of line-by-line (ICANON), ISIG disables
// Ctrl-C command and IEXTEN the Ctrl-V one.
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
// read() function now returns as soon as there is any
// input to be read.
raw.c_cc[VMIN] = 0;
// Forcing read() function to return every 1/10 of a
// second if there is nothing to read.
raw.c_cc[VTIME] = 1;
*/
consoleBufferOpen();
/// if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
/// die("Failed to set raw mode");
}
/// by Siemargl rewritten, still Ctrl+ combination works only in english locale, so need analyze scancode
int editorReadKey() {
int key = con_getch2();
if (key == 0)
die("Window closed by moused X-button");
if (0 != (key & 0xff)) {
key &= 0xff;
switch (key) {
case 27: // ESC
return '\x1b';
case 13: // ENTER
return '\r';
case 8: // BACKSPACE
return BACKSPACE;
case 9: // TAB
return key;
case 22: // Ctrl+V
return CTRL_KEY('v');
case 3: // Ctrl+C
return CTRL_KEY('c');
case 12: // Ctrl+L
return CTRL_KEY('l');
case 17: // Ctrl+Q
case 26: // Ctrl+Z
return CTRL_KEY('q');
case 19: // Ctrl+S
return CTRL_KEY('s');
case 5: // Ctrl+E
return CTRL_KEY('e');
case 4: // Ctrl+D
return CTRL_KEY('d');
case 6: // Ctrl+F
return CTRL_KEY('f');
/*
case 8: // Ctrl+H
return CTRL_KEY('h');
*/
case 24: // Ctrl+X
return CTRL_KEY('x');
default:
return key;
}
} else {
key = (key >> 8) & 0xff;
switch (key) {
case 83: // Del
return DEL_KEY;
case 75: // Left
return ARROW_LEFT;
case 77: // Right
return ARROW_RIGHT;
case 72: // Up
return ARROW_UP;
case 80: // Down
return ARROW_DOWN;
case 81: // PgDn
return PAGE_DOWN;
case 73: // PgUp
return PAGE_UP;
case 71: // Home
return HOME_KEY;
case 79: // End
return END_KEY;
default:
return 0;
}
}
return 0;
}
int getWindowSize(int* screen_rows, int* screen_cols) {
/// struct winsize ws;
// Getting window size thanks to ioctl into the given
// winsize struct.
/*
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
return -1;
} else {
*screen_cols = ws.ws_col;
*screen_rows = ws.ws_row;
return 0;
}
*/
*screen_cols = con_def_wnd_width;
*screen_rows = con_def_wnd_height;
}
void editorUpdateWindowSize() {
if (getWindowSize(&ec.screen_rows, &ec.screen_cols) == -1)
die("Failed to get window size");
ec.screen_rows -= 2; // Room for the status bar.
}
void editorHandleSigwinch() {
editorUpdateWindowSize();
if (ec.cursor_y > ec.screen_rows)
ec.cursor_y = ec.screen_rows - 1;
if (ec.cursor_x > ec.screen_cols)
ec.cursor_x = ec.screen_cols - 1;
editorRefreshScreen();
}
void editorHandleSigcont() {
disableRawMode();
consoleBufferOpen();
enableRawMode();
editorRefreshScreen();
}
void consoleBufferOpen() {
// Switch to another terminal buffer in order to be able to restore state at exit
// by calling consoleBufferClose().
/// if (write(STDOUT_FILENO, "\x1b[?47h", 6) == -1)
/// die("Error changing terminal buffer");
}
void consoleBufferClose() {
// Restore console to the state tte opened.
/// if (write(STDOUT_FILENO, "\x1b[?9l", 5) == -1 ||
/// write(STDOUT_FILENO, "\x1b[?47l", 6) == -1)
/// die("Error restoring buffer state");
/*struct a_buf ab = {.buf = NULL, .len = 0};
char* buf = NULL;
if (asprintf(&buf, "\x1b[%d;%dH\r\n", ec.screen_rows + 1, 1) == -1)
die("Error restoring buffer state");
abufAppend(&ab, buf, strlen(buf));
free(buf);
if (write(STDOUT_FILENO, ab.buf, ab.len) == -1)
die("Error restoring buffer state");
abufFree(&ab);*/
editorClearScreen();
}
/*** Syntax highlighting ***/
int isSeparator(int c) {
// strchr() looks to see if any one of the characters in the first string
// appear in the second string. If so, it returns a pointer to the
// character in the second string that matched. Otherwise, it
// returns NULL.
return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[]:;", c) != NULL;
}
int isAlsoNumber(int c) {
return c == '.' || c == 'x' || c == 'a' || c == 'b' || c == 'c' || c == 'd' || c == 'e' || c == 'f';
}
void editorUpdateSyntax(editor_row* row) {
row -> highlight = realloc(row -> highlight, row -> render_size);
// void * memset ( void * ptr, int value, size_t num );
// Sets the first num bytes of the block of memory pointed by ptr to
// the specified value. With this we set all characters to HL_NORMAL.
memset(row -> highlight, HL_NORMAL, row -> render_size);
if (ec.syntax == NULL)
return;
char** keywords = ec.syntax -> keywords;
char* scs = ec.syntax -> singleline_comment_start;
char* mcs = ec.syntax -> multiline_comment_start;
char* mce = ec.syntax -> multiline_comment_end;
int scs_len = scs ? strlen(scs) : 0;
int mcs_len = mcs ? strlen(mcs) : 0;
int mce_len = mce ? strlen(mce) : 0;
int prev_sep = 1; // True (1) if the previous char is a separator, false otherwise.
int in_string = 0; // If != 0, inside a string. We also keep track if it's ' or "
int in_comment = (row -> idx > 0 && ec.row[row -> idx - 1].hl_open_comment); // This is ONLY used on ML comments.
int i = 0;
while (i < row -> render_size) {
char c = row -> render[i];
// Highlight type of the previous character.
unsigned char prev_highlight = (i > 0) ? row -> highlight[i - 1] : HL_NORMAL;
if (scs_len && !in_string && !in_comment) {
// int strncmp ( const char * str1, const char * str2, size_t num );
// Compares up to num characters of the C string str1 to those of the C string str2.
// This function starts comparing the first character of each string. If they are
// equal to each other, it continues with the following pairs until the characters
// differ, until a terminating null-character is reached, or until num characters
// match in both strings, whichever happens first.
if (!strncmp(&row -> render[i], scs, scs_len)) {
memset(&row -> highlight[i], HL_SL_COMMENT, row -> render_size - i);
break;
}
}
if (mcs_len && mce_len && !in_string) {
if (in_comment) {
row -> highlight[i] = HL_ML_COMMENT;
if (!strncmp(&row -> render[i], mce, mce_len)) {
memset(&row -> highlight[i], HL_ML_COMMENT, mce_len);
i += mce_len;
in_comment = 0;
prev_sep = 1;
continue;
} else {
i++;
continue;
}
} else if (!strncmp(&row -> render[i], mcs, mcs_len)) {
memset(&row -> highlight[i], HL_ML_COMMENT, mcs_len);
i += mcs_len;
in_comment = 1;
continue;
}
}
if (ec.syntax -> flags & HL_HIGHLIGHT_STRINGS) {
if (in_string) {
row -> highlight[i] = HL_STRING;
// If were in a string and the current character is a backslash (\),
// and theres at least one more character in that line that comes
// after the backslash, then we highlight the character that comes
// after the backslash with HL_STRING and consume it. We increment
// i by 2 to consume both characters at once.
if (c == '\\' && i + 1 < row -> render_size) {
row -> highlight[i + 1] = HL_STRING;
i += 2;
continue;
}
if (c == in_string)
in_string = 0;
i++;
prev_sep = 1;
continue;
} else {
if (c == '"' || c == '\'') {
in_string = c;
row -> highlight[i] = HL_STRING;
i++;
continue;
}
}
}
if (ec.syntax -> flags & HL_HIGHLIGHT_NUMBERS) {
if ((isdigit(c) && (prev_sep || prev_highlight == HL_NUMBER)) ||
(isAlsoNumber(c) && prev_highlight == HL_NUMBER)) {
row -> highlight[i] = HL_NUMBER;
i++;
prev_sep = 0;
continue;
}
}
if (prev_sep) {
int j;
for (j = 0; keywords[j]; j++) {
int kw_len = strlen(keywords[j]);
int kw_2 = keywords[j][kw_len - 1] == '|';
if (kw_2)
kw_len--;
// Keywords require a separator both before and after the keyword.
if (!strncmp(&row -> render[i], keywords[j], kw_len) &&
isSeparator(row -> render[i + kw_len])) {
memset(&row -> highlight[i], kw_2 ? HL_KEYWORD_2 : HL_KEYWORD_1, kw_len);
i += kw_len;
break;
}
}
if (keywords[j] != NULL) {
prev_sep = 0;
continue;
}
}
prev_sep = isSeparator(c);
i++;
}
int changed = (row -> hl_open_comment != in_comment);
// This tells us whether the row ended as an unclosed multi-line
// comment or not.
row -> hl_open_comment = in_comment;
// A user could comment out an entire file just by changing one line.
// So it seems like we need to update the syntax of all the lines
// following the current line. However, we know the highlighting
// of the next line will not change if the value of this lines
// // // hl_open_comment did not change. So we check if it changed, and
// // only call editorUpdateSyntax() on the next line if
// hl_open_comment changed (and if there is a next line in the file).
// Because editorUpdateSyntax() keeps calling itself with the next
// line, the change will continue to propagate to more and more lines
// until one of them is unchanged, at which point we know that all
// the lines after that one must be unchanged as well.
if (changed && row -> idx + 1 < ec.num_rows)
editorUpdateSyntax(&ec.row[row -> idx + 1]);
}
int editorSyntaxToColor(int highlight) {
// We return ANSI codes for colors.
// See https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
// for a list of them.
switch (highlight) {
case HL_SL_COMMENT:
case HL_ML_COMMENT: return 36;
case HL_KEYWORD_1: return 31;
case HL_KEYWORD_2: return 32;
case HL_STRING: return 33;
case HL_NUMBER: return 35;
case HL_MATCH: return 34;
default: return 37;
}
}
void editorSelectSyntaxHighlight() {
ec.syntax = NULL;
if (ec.file_name == NULL)
return;
for (unsigned int j = 0; j < HL_DB_ENTRIES; j++) {
struct editor_syntax* es = &HL_DB[j];
unsigned int i = 0;
while (es -> file_match[i]) {
char* p = strstr(ec.file_name, es -> file_match[i]);
if (p != NULL) {
// Returns a pointer to the first occurrence of str2 in str1,
// or a null pointer if str2 is not part of str1.
int pat_len = strlen(es -> file_match[i]);
if (es -> file_match[i][0] != '.' || p[pat_len] == '\0') {
ec.syntax = es;
int file_row;
for (file_row = 0; file_row < ec.num_rows; file_row++) {
editorUpdateSyntax(&ec.row[file_row]);
}
return;
}
}
i++;
}
}
}
/*** Row operations ***/
int editorRowCursorXToRenderX(editor_row* row, int cursor_x) {
int render_x = 0;
int j;
// For each character, if its a tab we use rx % TTE_TAB_STOP
// to find out how many columns we are to the right of the last
// tab stop, and then subtract that from TTE_TAB_STOP - 1 to
// find out how many columns we are to the left of the next tab
// stop. We add that amount to rx to get just to the left of the
// next tab stop, and then the unconditional rx++ statement gets
// us right on the next tab stop. Notice how this works even if
// we are currently on a tab stop.
for (j = 0; j < cursor_x; j++) {
if (row -> chars[j] == '\t')
render_x += (TTE_TAB_STOP - 1) - (render_x % TTE_TAB_STOP);
render_x++;
}
return render_x;
}
int editorRowRenderXToCursorX(editor_row* row, int render_x) {
int cur_render_x = 0;
int cursor_x;
for (cursor_x = 0; cursor_x < row -> size; cursor_x++) {
if (row -> chars[cursor_x] == '\t')
cur_render_x += (TTE_TAB_STOP - 1) - (cur_render_x % TTE_TAB_STOP);
cur_render_x++;
if (cur_render_x > render_x)
return cursor_x;
}
return cursor_x;
}
void editorUpdateRow(editor_row* row) {
// First, we have to loop through the chars of the row
// and count the tabs in order to know how much memory
// to allocate for render. The maximum number of characters
// needed for each tab is 8. row->size already counts 1 for
// each tab, so we multiply the number of tabs by 7 and add
// that to row->size to get the maximum amount of memory we'll
// need for the rendered row.
int tabs = 0;
int j;
for (j = 0; j < row -> size; j++) {
if (row -> chars[j] == '\t')
tabs++;
}
free(row -> render);
row -> render = malloc(row -> size + tabs * (TTE_TAB_STOP - 1) + 1);
// After allocating the memory, we check whether the current character
// is a tab. If it is, we append one space (because each tab must
// advance the cursor forward at least one column), and then append
// spaces until we get to a tab stop, which is a column that is
// divisible by 8
int idx = 0;
for (j = 0; j < row -> size; j++) {
if (row -> chars[j] == '\t') {
row -> render[idx++] = ' ';
while (idx % TTE_TAB_STOP != 0)
row -> render[idx++] = ' ';
} else
row -> render[idx++] = row -> chars[j];
}
row -> render[idx] = '\0';
row -> render_size = idx;
editorUpdateSyntax(row);
}
void editorInsertRow(int at, char* s, size_t line_len) {
if (at < 0 || at > ec.num_rows)
return;
ec.row = realloc(ec.row, sizeof(editor_row) * (ec.num_rows + 1));
memmove(&ec.row[at + 1], &ec.row[at], sizeof(editor_row) * (ec.num_rows - at));
for (int j = at + 1; j <= ec.num_rows; j++) {
ec.row[j].idx++;
}
ec.row[at].idx = at;
ec.row[at].size = line_len;
ec.row[at].chars = malloc(line_len + 1); // We want to add terminator char '\0' at the end
memcpy(ec.row[at].chars, s, line_len);
ec.row[at].chars[line_len] = '\0';
ec.row[at].render_size = 0;
ec.row[at].render = NULL;
ec.row[at].highlight = NULL;
ec.row[at].hl_open_comment = 0;
editorUpdateRow(&ec.row[at]);
ec.num_rows++;
ec.dirty++;
}
void editorFreeRow(editor_row* row) {
free(row -> render);
free(row -> chars);
free(row -> highlight);
}
void editorDelRow(int at) {
if (at < 0 || at >= ec.num_rows)
return;
editorFreeRow(&ec.row[at]);
memmove(&ec.row[at], &ec.row[at + 1], sizeof(editor_row) * (ec.num_rows - at - 1));
for (int j = at; j < ec.num_rows - 1; j++) {
ec.row[j].idx--;
}
ec.num_rows--;
ec.dirty++;
}
// -1 down, 1 up
void editorFlipRow(int dir) {
editor_row c_row = ec.row[ec.cursor_y];
ec.row[ec.cursor_y] = ec.row[ec.cursor_y - dir];
ec.row[ec.cursor_y - dir] = c_row;
ec.row[ec.cursor_y].idx += dir;
ec.row[ec.cursor_y - dir].idx -= dir;
int first = (dir == 1) ? ec.cursor_y - 1 : ec.cursor_y;
editorUpdateSyntax(&ec.row[first]);
editorUpdateSyntax(&ec.row[first] + 1);
if (ec.num_rows - ec.cursor_y > 2)
editorUpdateSyntax(&ec.row[first] + 2);
ec.cursor_y -= dir;
ec.dirty++;
}
void editorCopy(int cut) {
ec.copied_char_buffer = realloc(ec.copied_char_buffer, strlen(ec.row[ec.cursor_y].chars) + 1);
strcpy(ec.copied_char_buffer, ec.row[ec.cursor_y].chars);
editorSetStatusMessage(cut ? "Content cut" : "Content copied");
}
void editorCut() {
editorCopy(-1);
editorDelRow(ec.cursor_y);
if (ec.num_rows - ec.cursor_y > 0)
editorUpdateSyntax(&ec.row[ec.cursor_y]);
if (ec.num_rows - ec.cursor_y > 1)
editorUpdateSyntax(&ec.row[ec.cursor_y + 1]);
ec.cursor_x = ec.cursor_y == ec.num_rows ? 0 : ec.row[ec.cursor_y].size;
}
void editorPaste() {
if (ec.copied_char_buffer == NULL)
return;
if (ec.cursor_y == ec.num_rows)
editorInsertRow(ec.cursor_y, ec.copied_char_buffer, strlen(ec.copied_char_buffer));
else
editorRowAppendString(&ec.row[ec.cursor_y], ec.copied_char_buffer, strlen(ec.copied_char_buffer));
ec.cursor_x += strlen(ec.copied_char_buffer);
}
void editorRowInsertChar(editor_row* row, int at, int c) {
if (at < 0 || at > row -> size)
at = row -> size;
// We need to allocate 2 bytes because we also have to make room for
// the null byte.
row -> chars = realloc(row -> chars, row -> size + 2);
// memmove it's like memcpy(), but is safe to use when the source and
// destination arrays overlap
memmove(&row -> chars[at + 1], &row -> chars[at], row -> size - at + 1);
row -> size++;
row -> chars[at] = c;
editorUpdateRow(row);
ec.dirty++; // This way we can see "how dirty" a file is.
}
void editorInsertNewline() {
// If we're at the beginning of a line, all we have to do is insert
// a new blank row before the line we're on.
if (ec.cursor_x == 0) {
editorInsertRow(ec.cursor_y, "", 0);
// Otherwise, we have to split the line we're on into two rows.
} else {
editor_row* row = &ec.row[ec.cursor_y];
editorInsertRow(ec.cursor_y + 1, &row -> chars[ec.cursor_x], row -> size - ec.cursor_x);
row = &ec.row[ec.cursor_y];
row -> size = ec.cursor_x;
row -> chars[row -> size] = '\0';
editorUpdateRow(row);
}
ec.cursor_y++;
ec.cursor_x = 0;
}
void editorRowAppendString(editor_row* row, char* s, size_t len) {
row -> chars = realloc(row -> chars, row -> size + len + 1);
memcpy(&row -> chars[row -> size], s, len);
row -> size += len;
row -> chars[row -> size] = '\0';
editorUpdateRow(row);
ec.dirty++;
}
void editorRowDelChar(editor_row* row, int at) {
if (at < 0 || at >= row -> size)
return;
// Overwriting the deleted character with the characters that come
// after it.
memmove(&row -> chars[at], &row -> chars[at + 1], row -> size - at);
row -> size--;
editorUpdateRow(row);
ec.dirty++;
}
/*** Editor operations ***/
void editorInsertChar(int c) {
// If this is true, the cursor is on the tilde line after the end of
// the file, so we need to append a new row to the file before inserting
// a character there.
if (ec.cursor_y == ec.num_rows)
editorInsertRow(ec.num_rows, "", 0);
editorRowInsertChar(&ec.row[ec.cursor_y], ec.cursor_x, c);
ec.cursor_x++; // This way we can see "how dirty" a file is.
}
void editorDelChar() {
// If the cursor is past the end of the file, there's nothing to delete.
if (ec.cursor_y == ec.num_rows)
return;
// Cursor is at the beginning of a file, there's nothing to delete.
if (ec.cursor_x == 0 && ec.cursor_y == 0)
return;
editor_row* row = &ec.row[ec.cursor_y];
if (ec.cursor_x > 0) {
editorRowDelChar(row, ec.cursor_x - 1);
ec.cursor_x--;
// Deleting a line and moving up all the content.
} else {
ec.cursor_x = ec.row[ec.cursor_y - 1].size;
editorRowAppendString(&ec.row[ec.cursor_y -1], row -> chars, row -> size);
editorDelRow(ec.cursor_y);
ec.cursor_y--;
}
}
/*** File I/O ***/
char* editorRowsToString(int* buf_len) {
int total_len = 0;
int j;
// Adding up the lengths of each row of text, adding 1
// to each one for the newline character we'll add to
// the end of each line.
for (j = 0; j < ec.num_rows; j++) {
total_len += ec.row[j].size + 1
+ (fileIsOd0a ? 1:0); /// winFile suppor
}
*buf_len = total_len;
char* buf = malloc(total_len);
char* p = buf;
// Copying the contents of each row to the end of the
// buffer, appending a newline character after each
// row.
for (j = 0; j < ec.num_rows; j++) {
memcpy(p, ec.row[j].chars, ec.row[j].size);
p += ec.row[j].size;
/// winFile support
if (fileIsOd0a) *p++ = '\r';
*p = '\n';
p++;
}
return buf;
}
extern int getline(char **buf, size_t *bufsiz, FILE *fp);
void editorOpen(char* file_name) {
free(ec.file_name);
ec.file_name = strdup(file_name);
editorSelectSyntaxHighlight();
FILE* file = fopen(file_name, "r+");
if (!file)
die("Failed to open the file");
char* line = NULL;
// Unsigned int of at least 16 bit.
size_t line_cap = 0;
// Bigger than int
int line_len; ///was ssize_t
fileIsOd0a = 0; /// winFile support
while ((line_len = getline(&line, &line_cap, file)) != -1) {
// We already know each row represents one line of text, there's no need
// to keep carriage return and newline characters.
if (line_len > 0 && (line[line_len - 1] == '\n' || line[line_len - 1] == '\r'))
line_len--;
/// Siemargl fix 0d0a windows file, save format flag
if (line_len > 0 && line[line_len - 1] == '\r')
{
line_len--;
fileIsOd0a = 1;
}
editorInsertRow(ec.num_rows, line, line_len);
}
free(line);
fclose(file);
ec.dirty = 0;
}
void editorSave() {
if (ec.file_name == NULL) {
ec.file_name = editorPrompt("Save as: %s (ESC to cancel)", NULL);
if (ec.file_name == NULL) {
editorSetStatusMessage("Save aborted");
return;
}
editorSelectSyntaxHighlight();
}
int len;
char* buf = editorRowsToString(&len);
/// siemargl rewrite using standard FILE stream
FILE *fd = fopen(ec.file_name,"w+b");
int rc = -1;
if (fd) {
if ((rc = fwrite(buf, 1, len, fd)) == len) {
fclose(fd);
free(buf);
ec.dirty = 0;
editorSetStatusMessage("%d bytes written to disk", len);
return;
}
fclose(fd);
}
free(buf);
editorSetStatusMessage("Cant's save file. Error occurred: %s", strerror(errno));
}
/*** Search section ***/
void editorSearchCallback(char* query, int key) {
// Index of the row that the last match was on, -1 if there was
// no last match.
static int last_match = -1;
// 1 for searching forward and -1 for searching backwards.
static int direction = 1;
static int saved_highlight_line;
static char* saved_hightlight = NULL;
if (saved_hightlight) {
memcpy(ec.row[saved_highlight_line].highlight, saved_hightlight, ec.row[saved_highlight_line].render_size);
free(saved_hightlight);
saved_hightlight = NULL;
}
// Checking if the user pressed Enter or Escape, in which case
// they are leaving search mode so we return immediately.
if (key == '\r' || key == '\x1b') {
last_match = -1;
direction = 1;
return;
} else if (key == ARROW_RIGHT || key == ARROW_DOWN) {
direction = 1;
} else if (key == ARROW_LEFT || key == ARROW_UP) {
if (last_match == -1) {
// If nothing matched and the left or up arrow key was pressed
return;
}
direction = -1;
} else {
last_match = -1;
direction = 1;
}
int current = last_match;
int i;
for (i = 0; i < ec.num_rows; i++) {
current += direction;
if (current == -1)
current = ec.num_rows - 1;
else if (current == ec.num_rows)
current = 0;
editor_row* row = &ec.row[current];
// We use strstr to check if query is a substring of the
// current row. It returns NULL if there is no match,
// oterwhise it returns a pointer to the matching substring.
char* match = strstr(row -> render, query);
if (match) {
last_match = current;
ec.cursor_y = current;
ec.cursor_x = editorRowRenderXToCursorX(row, match - row -> render);
// We set this like so to scroll to the bottom of the file so
// that the next screen refresh will cause the matching line to
// be at the very top of the screen.
ec.row_offset = ec.num_rows;
saved_highlight_line = current;
saved_hightlight = malloc(row -> render_size);
memcpy(saved_hightlight, row -> highlight, row -> render_size);
memset(&row -> highlight[match - row -> render], HL_MATCH, strlen(query));
break;
}
}
}
void editorSearch() {
int saved_cursor_x = ec.cursor_x;
int saved_cursor_y = ec.cursor_y;
int saved_col_offset = ec.col_offset;
int saved_row_offset = ec.row_offset;
char* query = editorPrompt("Search: %s (Use ESC / Enter / Arrows)", editorSearchCallback);
if (query) {
free(query);
// If query is NULL, that means they pressed Escape, so in that case we
// restore the cursor previous position.
} else {
ec.cursor_x = saved_cursor_x;
ec.cursor_y = saved_cursor_y;
ec.col_offset = saved_col_offset;
ec.row_offset = saved_row_offset;
}
}
/*** Append buffer section **/
void abufAppend(struct a_buf* ab, const char* s, int len) {
// Using realloc to get a block of free memory that is
// the size of the current string + the size of the string
// to be appended.
char* new = realloc(ab -> buf, ab -> len + len);
if (new == NULL)
return;
// Copying the string s at the end of the current data in
// the buffer.
memcpy(&new[ab -> len], s, len);
ab -> buf = new;
ab -> len += len;
}
void abufFree(struct a_buf* ab) {
// Deallocating buffer.
free(ab -> buf);
}
/*** Output section ***/
void editorScroll() {
ec.render_x = 0;
if (ec.cursor_y < ec.num_rows)
ec.render_x = editorRowCursorXToRenderX(&ec.row[ec.cursor_y], ec.cursor_x);
// The first if statement checks if the cursor is above the visible window,
// and if so, scrolls up to where the cursor is. The second if statement checks
// if the cursor is past the bottom of the visible window, and contains slightly
// more complicated arithmetic because ec.row_offset refers to what's at the top
// of the screen, and we have to get ec.screen_rows involved to talk about what's
// at the bottom of the screen.
if (ec.cursor_y < ec.row_offset)
ec.row_offset = ec.cursor_y;
if (ec.cursor_y >= ec.row_offset + ec.screen_rows)
ec.row_offset = ec.cursor_y - ec.screen_rows + 1;
if (ec.render_x < ec.col_offset)
ec.col_offset = ec.render_x;
if (ec.render_x >= ec.col_offset + ec.screen_cols)
ec.col_offset = ec.render_x - ec.screen_cols + 1;
}
void editorDrawStatusBar(struct a_buf* ab) {
// This switches to inverted colors.
// NOTE:
// The m command (Select Graphic Rendition) causes the text printed
// after it to be printed with various possible attributes including
// bold (1), underscore (4), blink (5), and inverted colors (7). An
// argument of 0 clears all attributes (the default one). See
// http://vt100.net/docs/vt100-ug/chapter3.html#SGR for more info.
abufAppend(ab, "\x1b[7m", 4);
char status[80], r_status[80];
// Showing up to 20 characters of the filename, followed by the number of lines.
int len = snprintf(status, sizeof(status), " Editing: %.20s %s", ec.file_name ? ec.file_name : "New file", ec.dirty ? "(modified)" : "");
int col_size = ec.row && ec.cursor_y <= ec.num_rows - 1 ? col_size = ec.row[ec.cursor_y].size : 0;
int r_len = snprintf(r_status, sizeof(r_status), "%d/%d lines %d/%d cols ", ec.cursor_y + 1 > ec.num_rows ? ec.num_rows : ec.cursor_y + 1, ec.num_rows,
ec.cursor_x + 1 > col_size ? col_size : ec.cursor_x + 1, col_size);
if (len > ec.screen_cols)
len = ec.screen_cols;
abufAppend(ab, status, len);
while (len < ec.screen_cols) {
if (ec.screen_cols - len == r_len) {
abufAppend(ab, r_status, r_len);
break;
} else {
abufAppend(ab, " ", 1);
len++;
}
}
// This switches back to normal colors.
abufAppend(ab, "\x1b[m", 3);
abufAppend(ab, "\r\n", 2);
}
void editorDrawMessageBar(struct a_buf *ab) {
// Clearing the message bar.
/// abufAppend(ab, "\x1b[K", 3); /// not work in Kolibri
int msg_len = strlen(ec.status_msg);
if (msg_len > ec.screen_cols)
msg_len = ec.screen_cols;
// We only show the message if its less than 5 secons old, but
// remember the screen is only being refreshed after each keypress.
if (msg_len && time(NULL) - ec.status_msg_time < 5)
abufAppend(ab, ec.status_msg, msg_len);
}
void editorDrawWelcomeMessage(struct a_buf* ab) {
char welcome[80];
// Using snprintf to truncate message in case the terminal
// is too tiny to handle the entire string.
int welcome_len = snprintf(welcome, sizeof(welcome),
"TinyTextEditor %s", TTE_VERSION);
if (welcome_len > ec.screen_cols)
welcome_len = ec.screen_cols;
// Centering the message.
int padding = (ec.screen_cols - welcome_len) / 2;
// Remember that everything != 0 is true.
if (padding) {
abufAppend(ab, "~", 1);
padding--;
}
while (padding--)
abufAppend(ab, " ", 1);
abufAppend(ab, welcome, welcome_len);
}
// The ... argument makes editorSetStatusMessage() a variadic function,
// meaning it can take any number of arguments. C's way of dealing with
// these arguments is by having you call va_start() and va_end() on a
// // value of type va_list. The last argument before the ... (in this
// case, msg) must be passed to va_start(), so that the address of
// the next arguments is known. Then, between the va_start() and
// va_end() calls, you would call va_arg() and pass it the type of
// the next argument (which you usually get from the given format
// string) and it would return the value of that argument. In
// this case, we pass msg and args to vsnprintf() and it takes care
// of reading the format string and calling va_arg() to get each
// argument.
void editorSetStatusMessage(const char* msg, ...) {
va_list args;
va_start(args, msg);
vsnprintf(ec.status_msg, sizeof(ec.status_msg), msg, args);
va_end(args);
ec.status_msg_time = time(NULL);
}
void editorDrawRows(struct a_buf* ab) {
int y;
for (y = 0; y < ec.screen_rows; y++) {
int file_row = y + ec.row_offset;
if(file_row >= ec.num_rows) {
if (ec.num_rows == 0 && y == ec.screen_rows / 3)
editorDrawWelcomeMessage(ab);
else
abufAppend(ab, "~", 1);
} else {
int len = ec.row[file_row].render_size - ec.col_offset;
// len can be a negative number, meaning the user scrolled
// horizontally past the end of the line. In that case, we set
// len to 0 so that nothing is displayed on that line.
if (len < 0)
len = 0;
if (len > ec.screen_cols)
len = ec.screen_cols;
char* c = &ec.row[file_row].render[ec.col_offset];
unsigned char* highlight = &ec.row[file_row].highlight[ec.col_offset];
int current_color = -1;
int j;
for (j = 0; j < len; j++) {
// Displaying nonprintable characters as (A-Z, @, and ?).
if (iscntrl(c[j])) {
char sym = (c[j] <= 26) ? '@' + c[j] : '?';
abufAppend(ab, "\x1b[7m", 4);
abufAppend(ab, &sym, 1);
abufAppend(ab, "\x1b[m", 3);
if (current_color != -1) {
char buf[16];
int c_len = snprintf(buf, sizeof(buf), "\x1b[%dm", current_color);
abufAppend(ab, buf, c_len);
}
} else if (highlight[j] == HL_NORMAL) {
if (current_color != -1) {
abufAppend(ab, "\x1b[m", 3); /// was [39, 5
current_color = -1;
}
abufAppend(ab, &c[j], 1);
} else {
int color = editorSyntaxToColor(highlight[j]);
// We only use escape sequence if the new color is different
// from the last character's color.
if (color != current_color) {
current_color = color;
char buf[16];
int c_len = snprintf(buf, sizeof(buf), "\x1b[%dm", color);
abufAppend(ab, buf, c_len);
}
abufAppend(ab, &c[j], 1);
}
}
abufAppend(ab, "\x1b[m", 3); /// was [39, 5
}
// Redrawing each line instead of the whole screen.
/// abufAppend(ab, "\x1b[K", 3); /// not work in Kolibri
// Addind a new line
abufAppend(ab, "\r\n", 2);
}
}
void editorRefreshScreen() {
editorScroll();
struct a_buf ab = ABUF_INIT;
// Hiding the cursor while the screen is refreshing.
// See http://vt100.net/docs/vt100-ug/chapter3.html#S3.3.4
// for more info.
/// abufAppend(&ab, "\x1b[?25l", 6);
abufAppend(&ab, "\x1b[H", 3);
/// full clear because "\x1b[K" not work in Kolibri
abufAppend(&ab, "\x1b[2J", 4);
editorDrawRows(&ab);
editorDrawStatusBar(&ab);
editorDrawMessageBar(&ab);
// Moving the cursor where it should be.
char buf[32];
/// snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (ec.cursor_y - ec.row_offset) + 1, (ec.render_x - ec.col_offset) + 1);
/// a bit different in Kolibri
snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (ec.render_x - ec.col_offset), (ec.cursor_y - ec.row_offset));
abufAppend(&ab, buf, strlen(buf));
// Showing again the cursor.
/// abufAppend(&ab, "\x1b[?25h", 6);
// Writing all content at once
/// write(STDOUT_FILENO, ab.buf, ab.len);
con_write_string(ab.buf, ab.len);
abufFree(&ab);
}
void editorClearScreen() {
// Writing 4 bytes out to the terminal:
// - (1 byte) \x1b : escape character
// - (3 bytes) [2J : Clears the entire screen, see
// http://vt100.net/docs/vt100-ug/chapter3.html#ED
// for more info.
/// write(STDOUT_FILENO, "\x1b[2J", 4);
con_write_string("\x1b[2J", 4);
// Writing 3 bytes to reposition the cursor back at
// the top-left corner, see
// http://vt100.net/docs/vt100-ug/chapter3.html#CUP
// for more info.
/// write(STDOUT_FILENO, "\x1b[H", 3);
con_write_string("\x1b[H", 3);
}
/*** Input section ***/
char* editorPrompt(char* prompt, void (*callback)(char*, int)) {
size_t buf_size = 128;
char* buf = malloc(buf_size);
size_t buf_len = 0;
buf[0] = '\0';
while (1) {
editorSetStatusMessage(prompt, buf);
editorRefreshScreen();
int c = editorReadKey();
if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
if (buf_len != 0)
buf[--buf_len] = '\0';
} else if (c == '\x1b') {
editorSetStatusMessage("");
if (callback)
callback(buf, c);
free(buf);
return NULL;
} else if (c == '\r') {
if (buf_len != 0) {
editorSetStatusMessage("");
if (callback)
callback(buf, c);
return buf;
}
} else if (!iscntrl(c) && isprint(c)) {
if (buf_len == buf_size - 1) {
buf_size *= 2;
buf = realloc(buf, buf_size);
}
buf[buf_len++] = c;
buf[buf_len] = '\0';
}
if (callback)
callback(buf, c);
}
}
void editorMoveCursor(int key) {
editor_row* row = (ec.cursor_y >= ec.num_rows) ? NULL : &ec.row[ec.cursor_y];
switch (key) {
case ARROW_LEFT:
if (ec.cursor_x != 0)
ec.cursor_x--;
// If <- is pressed, move to the end of the previous line
else if (ec.cursor_y > 0) {
ec.cursor_y--;
ec.cursor_x = ec.row[ec.cursor_y].size;
}
break;
case ARROW_RIGHT:
if (row && ec.cursor_x < row -> size)
ec.cursor_x++;
// If -> is pressed, move to the start of the next line
else if (row && ec.cursor_x == row -> size) {
ec.cursor_y++;
ec.cursor_x = 0;
}
break;
case ARROW_UP:
if (ec.cursor_y != 0)
ec.cursor_y--;
break;
case ARROW_DOWN:
if (ec.cursor_y < ec.num_rows)
ec.cursor_y++;
break;
}
// Move cursor_x if it ends up past the end of the line it's on
row = (ec.cursor_y >= ec.num_rows) ? NULL : &ec.row[ec.cursor_y];
int row_len = row ? row -> size : 0;
if (ec.cursor_x > row_len)
ec.cursor_x = row_len;
}
void editorProcessKeypress() {
static int quit_times = TTE_QUIT_TIMES;
int c = editorReadKey();
switch (c) {
case '\r': // Enter key
editorInsertNewline();
break;
case CTRL_KEY('q'):
if (ec.dirty && quit_times > 0) {
editorSetStatusMessage("Warning! File has unsaved changes. Press Ctrl-Q or ^Z %d more time%s to quit", quit_times, quit_times > 1 ? "s" : "");
quit_times--;
return;
}
editorClearScreen();
consoleBufferClose();
con_exit(1); /// KOS console
exit(0);
break;
case CTRL_KEY('s'):
editorSave();
break;
case CTRL_KEY('e'):
if (ec.cursor_y > 0 && ec.cursor_y <= ec.num_rows - 1)
editorFlipRow(1);
break;
case CTRL_KEY('d'):
if (ec.cursor_y < ec.num_rows - 1)
editorFlipRow(-1);
break;
case CTRL_KEY('x'):
if (ec.cursor_y < ec.num_rows)
editorCut();
break;
case CTRL_KEY('c'):
if (ec.cursor_y < ec.num_rows)
editorCopy(0);
break;
case CTRL_KEY('v'):
editorPaste();
break;
/// case CTRL_KEY('p'):
/// consoleBufferClose();
/// kill(0, SIGTSTP);
case ARROW_UP:
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
editorMoveCursor(c);
break;
case PAGE_UP:
case PAGE_DOWN:
{ // You can't declare variables directly inside a switch statement.
if (c == PAGE_UP)
ec.cursor_y = ec.row_offset;
else if (c == PAGE_DOWN)
ec.cursor_y = ec.row_offset + ec.screen_rows - 1;
int times = ec.screen_rows;
while (times--)
editorMoveCursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
}
break;
case HOME_KEY:
ec.cursor_x = 0;
break;
case END_KEY:
if (ec.cursor_y < ec.num_rows)
ec.cursor_x = ec.row[ec.cursor_y].size;
break;
case CTRL_KEY('f'):
editorSearch();
break;
case BACKSPACE:
case CTRL_KEY('h'):
case DEL_KEY:
if (c == DEL_KEY)
editorMoveCursor(ARROW_RIGHT);
editorDelChar();
break;
case CTRL_KEY('l'):
case '\x1b': // Escape key
break;
default:
editorInsertChar(c);
break;
}
quit_times = TTE_QUIT_TIMES;
}
/*** Init section ***/
void initEditor() {
ec.cursor_x = 0;
ec.cursor_y = 0;
ec.render_x = 0;
ec.row_offset = 0;
ec.col_offset = 0;
ec.num_rows = 0;
ec.row = NULL;
ec.dirty = 0;
ec.file_name = NULL;
ec.status_msg[0] = '\0';
ec.status_msg_time = 0;
ec.copied_char_buffer = NULL;
ec.syntax = NULL;
editorUpdateWindowSize();
// The SIGWINCH signal is sent to a process when its controlling
// terminal changes its size (a window change).
/// signal(SIGWINCH, editorHandleSigwinch);
// The SIGCONT signal instructs the operating system to continue
// (restart) a process previously paused by the SIGSTOP or SIGTSTP
// signal.
/// signal(SIGCONT, editorHandleSigcont);
}
void printHelp() {
/*
printf("Usage: tte [OPTIONS] [FILE]\n\n");
printf("\nKEYBINDINGS\n-----------\n\n");
printf("Keybinding\t\tAction\n\n");
printf("Ctrl-Q,^Z \t\tExit\n");
printf("Ctrl-S \t\tSave\n");
printf("Ctrl-F \t\tSearch. Esc, enter and arrows to interact once searching\n");
printf("Ctrl-E \t\tFlip line upwards\n");
printf("Ctrl-D \t\tFlip line downwards\n");
printf("Ctrl-C \t\tCopy line\n");
printf("Ctrl-X \t\tCut line\n");
printf("Ctrl-V \t\tPaste line\n");
/// printf("Ctrl-P \t\tPause tte (type \"fg\" to resume)\n");
printf("\n\nOPTIONS\n-------\n\n");
printf("Option \t\tAction\n\n");
printf("-h | --help \t\tPrints the help\n");
printf("-v | --version\t\tPrints the version of tte\n");
printf("\n\nFor now, usage of ISO 8859-1 is recommended.\n");
*/
/// NOTIFY HOTKEYS
char* __help__ =
"'Hotkeys: \n\
^Q, ^Z Exit \n\
Ctrl-S Save \n\
Ctrl-F Search. Esc, \n\
enter and arrows to interact once searching \n\
Ctrl-E Flip line upwards \n\
Ctrl-D Flip line downwards \n\
Ctrl-C Copy line \n\
Ctrl-X Cut line \n\
Ctrl-V Paste line' -t -I";
notify(__help__);
/// NOTIFY OPTIONS
__help__ =
"'Options:\n\
-h, --help Prints the help \n\
-v, --version Prints the version of tte \n\
For now, usage of ISO 8859-1 is recommended.\n' -t -I";
notify(__help__);
}
// 1 if editor should open, 0 otherwise, -1 if the program should exit
int handleArgs(int argc, char* argv[]) {
if (argc == 1)
return 0;
if (argc >= 2) {
if (strncmp("-h", argv[1], 2) == 0 || strncmp("--help", argv[1], 6) == 0) {
printHelp();
return -1;
} else if(strncmp("-v", argv[1], 2) == 0 || strncmp("--version", argv[1], 9) == 0) {
char _notify_version[256] = "'Version:\n";
strcat(_notify_version, TTE_VERSION);
strcat(_notify_version, "' -t -I");
/// printf("tte - version %s\n", TTE_VERSION);
notify(_notify_version);
return -1;
}
}
return 1;
}
int main(int argc, char* argv[]) {
#ifdef TCC_BUILD
con_init_console_dll_param(con_def_wnd_width, con_def_wnd_height, con_def_wnd_width, con_def_wnd_height, "TinyTextEditor");
#endif
#ifdef GCC_BUILD
load_console();
con_init(con_def_wnd_width, con_def_wnd_height, con_def_wnd_width, con_def_wnd_height, "TinyTextEditor");
#endif
initEditor();
int arg_response = handleArgs(argc, argv);
if (arg_response == 1) {
char* filename = argv[1];
// tolower
for (int i = 0; i < strlen(filename); i++) filename[i] = tolower(filename[i]);
editorOpen(filename);
char* title = argv[1];
strcat(title, " - TinyTextEditor");
con_set_title(title);
}
else if (arg_response == -1)
return 0;
enableRawMode();
editorSetStatusMessage(" Ctrl-Q, ^Z to quit | Ctrl-S to save | (tte -h | --help for more info)");
while (1) {
editorRefreshScreen();
editorProcessKeypress();
}
con_exit(1);
return 0;
}