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  1. /*
  2. *   Copyright (C) 2017 Daniel Morales
  3. *
  4. *   This program is free software: you can redistribute it and/or modify
  5. *   it under the terms of the GNU General Public License as published by
  6. *   the Free Software Foundation, either version 3 of the License, or
  7. *   any later version.
  8. *
  9. *   This program is distributed in the hope that it will be useful,
  10. *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12. *   GNU General Public License for more details.
  13. *
  14. *   You should have received a copy of the GNU General Public License
  15. *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16. */
  17. /* Kolibri port by Siemargl 2018 and update by maxcodehack 2020
  18.  * my fixes mostly commented with triple comment ///
  19.  * */
  20.  
  21. /*** Include section ***/
  22.  
  23. // We add them above our includes, because the header
  24. // files we are including use the macros to decide what
  25. // features to expose. These macros remove some compilation
  26. // warnings. See
  27. // https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
  28. // for more info.
  29. #define _DEFAULT_SOURCE
  30. #define _BSD_SOURCE
  31. #define _GNU_SOURCE
  32.  
  33. #include <ctype.h>
  34. #include <errno.h>
  35. ///#include <fcntl.h>
  36. ///#include <signal.h>
  37. #include <stdio.h>
  38. #include <stdarg.h>
  39. #include <stdlib.h>
  40. #include <string.h>
  41. ///#include <sys/ioctl.h>
  42. ///#include <sys/types.h>
  43. ///#include <termios.h>
  44. #include <time.h>
  45. ///#include <unistd.h>
  46. #include <conio.h>
  47.  
  48.  
  49.  
  50. /*** Define section ***/
  51.  
  52. // This mimics the Ctrl + whatever behavior, setting the
  53. // 3 upper bits of the character pressed to 0.
  54. ///#define CTRL_KEY(k) ((k) & 0x1f)
  55. // Siemargl - set top 4 bits
  56. #define CTRL_KEY(k) ((k) | 0xf000)
  57. // Empty buffer
  58. #define ABUF_INIT {NULL, 0}
  59. // Version code
  60. #define TTE_VERSION "0.0.5"
  61. // Length of a tab stop
  62. #define TTE_TAB_STOP 4
  63. // Times to press Ctrl-Q before exiting
  64. #define TTE_QUIT_TIMES 2
  65. // Highlight flags
  66. #define HL_HIGHLIGHT_NUMBERS (1 << 0)
  67. #define HL_HIGHLIGHT_STRINGS (1 << 1)
  68.  
  69. /*** Data section ***/
  70.  
  71. // Kolibri defaults
  72. int con_def_wnd_width   =    80;
  73. int     con_def_wnd_height  =    25;
  74. /// winFile support
  75. int     fileIsOd0a;
  76.  
  77. typedef struct editor_row {
  78.     int idx; // Row own index within the file.
  79.     int size; // Size of the content (excluding NULL term)
  80.     int render_size; // Size of the rendered content
  81.     char* chars; // Row content
  82.     char* render; // Row content "rendered" for screen (for TABs).
  83.     unsigned char* highlight; // This will tell you if a character is part of a string, comment, number...
  84.     int hl_open_comment; // True if the line is part of a ML comment.
  85. } editor_row;
  86.  
  87. struct editor_syntax {
  88.     // file_type field is the name of the filetype that will be displayed
  89.     // to the user in the status bar.
  90.     char* file_type;
  91.     // file_match is an array of strings, where each string contains a
  92.     // pattern to match a filename against. If the filename matches,
  93.     // then the file will be recognized as having that filetype.
  94.     char** file_match;
  95.     // This will be a NULL-terminated array of strings, each string containing
  96.     // a keyword. To differentiate between the two types of keywords,
  97.     // we’ll terminate the second type of keywords with a pipe (|)
  98.     // character (also known as a vertical bar).
  99.     char** keywords;
  100.     // We let each language specify its own single-line comment pattern.
  101.     char* singleline_comment_start;
  102.     // flags is a bit field that will contain flags for whether to
  103.     // highlight numbers and whether to highlight strings for that
  104.     // filetype.
  105.     char* multiline_comment_start;
  106.     char* multiline_comment_end;
  107.     int flags;
  108. };
  109.  
  110. struct editor_config {
  111.     int cursor_x;
  112.     int cursor_y;
  113.     int render_x;
  114.     int row_offset; // Offset of row displayed.
  115.     int col_offset; // Offset of col displayed.
  116.     int screen_rows; // Number of rows that we can show
  117.     int screen_cols; // Number of cols that we can show
  118.     int num_rows; // Number of rows
  119.     editor_row* row;
  120.     int dirty; // To know if a file has been modified since opening.
  121.     char* file_name;
  122.     char status_msg[80];
  123.     time_t status_msg_time;
  124.     char* copied_char_buffer;
  125.     struct editor_syntax* syntax;
  126. ///    struct termios orig_termios;
  127. } ec;
  128.  
  129. // Having a dynamic buffer will allow us to write only one
  130. // time once the screen is refreshing, instead of doing
  131. // a lot of write's.
  132. struct a_buf {
  133.     char* buf;
  134.     int len;
  135. };
  136.  
  137. enum editor_key {
  138. ///    BACKSPACE = 0x7f, // 127
  139.     BACKSPACE = 0x3e7, // fixed russian letter
  140.     ARROW_LEFT = 0x3e8, // 1000, large value out of the range of a char.
  141.     ARROW_RIGHT,
  142.     ARROW_UP,
  143.     ARROW_DOWN,
  144.     PAGE_UP,
  145.     PAGE_DOWN,
  146.     HOME_KEY,
  147.     END_KEY,
  148.     DEL_KEY
  149. };
  150.  
  151. enum editor_highlight {
  152.     HL_NORMAL = 0,
  153.     HL_SL_COMMENT,
  154.     HL_ML_COMMENT,
  155.     HL_KEYWORD_1,
  156.     HL_KEYWORD_2,
  157.     HL_STRING,
  158.     HL_NUMBER,
  159.     HL_MATCH
  160. };
  161.  
  162. /*** Filetypes ***/
  163.  
  164. char* C_HL_extensions[] = {".c", ".h", ".cpp", ".hpp", ".cc", NULL}; // Array must be terminated with NULL.
  165. char* JAVA_HL_extensions[] = {".java", NULL};
  166. char* PYTHON_HL_extensions[] = {".py", NULL};
  167. char* BASH_HL_extensions[] = {".sh", NULL};
  168. char* JS_HL_extensions[] = {".js", ".jsx", NULL};
  169. char* PHP_HL_extensions[] = {".php", NULL};
  170. char* JSON_HL_extensions[] = {".json", ".jsonp", NULL};
  171. char* XML_HL_extensions[] = {".xml", NULL};
  172. char* SQL_HL_extensions[] = {".sql", NULL};
  173. char* RUBY_HL_extensions[] = {".rb", NULL};
  174.  
  175. char* C_HL_keywords[] = {
  176.     "switch", "if", "while", "for", "break", "continue", "return", "else",
  177.     "struct", "union", "typedef", "static", "enum", "class", "case", "#include",
  178.     "volatile", "register", "sizeof", "typedef", "union", "goto", "const", "auto",
  179.     "#define", "#if", "#endif", "#error", "#ifdef", "#ifndef", "#undef",
  180.  
  181.     "int|", "long|", "double|", "float|", "char|", "unsigned|", "signed|",
  182.     "void|", "bool|", NULL
  183. };
  184.  
  185. char* JAVA_HL_keywords[] = {
  186.     "switch", "if", "while", "for", "break", "continue", "return", "else",
  187.     "in", "public", "private", "protected", "static", "final", "abstract",
  188.     "enum", "class", "case", "try", "catch", "do", "extends", "implements",
  189.     "finally", "import", "instanceof", "interface", "new", "package", "super",
  190.     "native", "strictfp",
  191.     "synchronized", "this", "throw", "throws", "transient", "volatile",
  192.  
  193.     "byte|", "char|", "double|", "float|", "int|", "long|", "short|",
  194.     "boolean|", NULL
  195. };
  196.  
  197. char* PYTHON_HL_keywords[] = {
  198.     "and", "as", "assert", "break", "class", "continue", "def", "del", "elif",
  199.     "else", "except", "exec", "finally", "for", "from", "global", "if", "import",
  200.     "in", "is", "lambda", "not", "or", "pass", "print", "raise", "return", "try",
  201.     "while", "with", "yield",
  202.  
  203.     "buffer|", "bytearray|", "complex|", "False|", "float|", "frozenset|", "int|",
  204.     "list|", "long|", "None|", "set|", "str|", "tuple|", "True|", "type|",
  205.     "unicode|", "xrange|", NULL
  206. };
  207.  
  208. char* BASH_HL_keywords[] = {
  209.     "case", "do", "done", "elif", "else", "esac", "fi", "for", "function", "if",
  210.     "in", "select", "then", "time", "until", "while", "alias", "bg", "bind", "break",
  211.     "builtin", "cd", "command", "continue", "declare", "dirs", "disown", "echo",
  212.     "enable", "eval", "exec", "exit", "export", "fc", "fg", "getopts", "hash", "help",
  213.     "history", "jobs", "kill", "let", "local", "logout", "popd", "pushd", "pwd", "read",
  214.     "readonly", "return", "set", "shift", "suspend", "test", "times", "trap", "type",
  215.     "typeset", "ulimit", "umask", "unalias", "unset", "wait", "printf", NULL
  216. };
  217.  
  218. char* JS_HL_keywords[] = {
  219.     "break", "case", "catch", "class", "const", "continue", "debugger", "default",
  220.     "delete", "do", "else", "enum", "export", "extends", "finally", "for", "function",
  221.     "if", "implements", "import", "in", "instanceof", "interface", "let", "new",
  222.     "package", "private", "protected", "public", "return", "static", "super", "switch",
  223.     "this", "throw", "try", "typeof", "var", "void", "while", "with", "yield", "true",
  224.     "false", "null", "NaN", "global", "window", "prototype", "constructor", "document",
  225.     "isNaN", "arguments", "undefined",
  226.  
  227.     "Infinity|", "Array|", "Object|", "Number|", "String|", "Boolean|", "Function|",
  228.     "ArrayBuffer|", "DataView|", "Float32Array|", "Float64Array|", "Int8Array|",
  229.     "Int16Array|", "Int32Array|", "Uint8Array|", "Uint8ClampedArray|", "Uint32Array|",
  230.     "Date|", "Error|", "Map|", "RegExp|", "Symbol|", "WeakMap|", "WeakSet|", "Set|", NULL
  231. };
  232.  
  233. char* PHP_HL_keywords[] = {
  234.     "__halt_compiler", "break", "clone", "die", "empty", "endswitch", "final", "global",
  235.     "include_once", "list", "private", "return", "try", "xor", "abstract", "callable",
  236.     "const", "do", "enddeclare", "endwhile", "finally", "goto", "instanceof", "namespace",
  237.     "protected", "static", "unset", "yield", "and", "case", "continue", "echo", "endfor",
  238.     "eval", "for", "if", "insteadof", "new", "public", "switch", "use", "array", "catch",
  239.     "declare", "else", "endforeach", "exit", "foreach", "implements", "interface", "or",
  240.     "require", "throw", "var", "as", "class", "default", "elseif", "endif", "extends",
  241.     "function", "include", "isset", "print", "require_once", "trait", "while", NULL
  242. };
  243.  
  244. char* JSON_HL_keywords[] = {
  245.     NULL
  246. };
  247.  
  248. char* XML_HL_keywords[] = {
  249.     NULL
  250. };
  251.  
  252. char* SQL_HL_keywords[] = {
  253.     "SELECT", "FROM", "DROP", "CREATE", "TABLE", "DEFAULT", "FOREIGN", "UPDATE", "LOCK",
  254.     "INSERT", "INTO", "VALUES", "LOCK", "UNLOCK", "WHERE", "DINSTINCT", "BETWEEN", "NOT",
  255.     "NULL", "TO", "ON", "ORDER", "GROUP", "IF", "BY", "HAVING", "USING", "UNION", "UNIQUE",
  256.     "AUTO_INCREMENT", "LIKE", "WITH", "INNER", "OUTER", "JOIN", "COLUMN", "DATABASE", "EXISTS",
  257.     "NATURAL", "LIMIT", "UNSIGNED", "MAX", "MIN", "PRECISION", "ALTER", "DELETE", "CASCADE",
  258.     "PRIMARY", "KEY", "CONSTRAINT", "ENGINE", "CHARSET", "REFERENCES", "WRITE",
  259.  
  260.     "BIT|", "TINYINT|", "BOOL|", "BOOLEAN|", "SMALLINT|", "MEDIUMINT|", "INT|", "INTEGER|",
  261.     "BIGINT|", "DOUBLE|", "DECIMAL|", "DEC|" "FLOAT|", "DATE|", "DATETIME|", "TIMESTAMP|",
  262.     "TIME|", "YEAR|", "CHAR|", "VARCHAR|", "TEXT|", "ENUM|", "SET|", "BLOB|", "VARBINARY|",
  263.     "TINYBLOB|", "TINYTEXT|", "MEDIUMBLOB|", "MEDIUMTEXT|", "LONGTEXT|",
  264.  
  265.     "select", "from", "drop", "create", "table", "default", "foreign", "update", "lock",
  266.     "insert", "into", "values", "lock", "unlock", "where", "dinstinct", "between", "not",
  267.     "null", "to", "on", "order", "group", "if", "by", "having", "using", "union", "unique",
  268.     "auto_increment", "like", "with", "inner", "outer", "join", "column", "database", "exists",
  269.     "natural", "limit", "unsigned", "max", "min", "precision", "alter", "delete", "cascade",
  270.     "primary", "key", "constraint", "engine", "charset", "references", "write",
  271.  
  272.     "bit|", "tinyint|", "bool|", "boolean|", "smallint|", "mediumint|", "int|", "integer|",
  273.     "bigint|", "double|", "decimal|", "dec|" "float|", "date|", "datetime|", "timestamp|",
  274.     "time|", "year|", "char|", "varchar|", "text|", "enum|", "set|", "blob|", "varbinary|",
  275.     "tinyblob|", "tinytext|", "mediumblob|", "mediumtext|", "longtext|", NULL
  276. };
  277.  
  278. char* RUBY_HL_keywords[] = {
  279.     "__ENCODING__", "__LINE__", "__FILE__", "BEGIN", "END", "alias", "and", "begin", "break",
  280.     "case", "class", "def", "defined?", "do", "else", "elsif", "end", "ensure", "for", "if",
  281.     "in", "module", "next", "not", "or", "redo", "rescue", "retry", "return", "self", "super",
  282.     "then", "undef", "unless", "until", "when", "while", "yield", NULL
  283. };
  284.  
  285. struct editor_syntax HL_DB[] = {
  286.     {
  287.         "c",
  288.         C_HL_extensions,
  289.         C_HL_keywords,
  290.         "//",
  291.         "/*",
  292.         "*/",
  293.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  294.     },
  295.     {
  296.         "java",
  297.         JAVA_HL_extensions,
  298.         JAVA_HL_keywords,
  299.         "//",
  300.         "/*",
  301.         "*/",
  302.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  303.     },
  304.     {
  305.         "python",
  306.         PYTHON_HL_extensions,
  307.         PYTHON_HL_keywords,
  308.         "#",
  309.         "'''",
  310.         "'''",
  311.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  312.     },
  313.     {
  314.         "bash",
  315.         BASH_HL_extensions,
  316.         BASH_HL_keywords,
  317.         "#",
  318.         NULL,
  319.         NULL,
  320.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  321.     },
  322.     {
  323.         "js",
  324.         JS_HL_extensions,
  325.         JS_HL_keywords,
  326.         "//",
  327.         "/*",
  328.         "*/",
  329.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  330.     },
  331.     {
  332.         "php",
  333.         PHP_HL_extensions,
  334.         PHP_HL_keywords,
  335.         "//",
  336.         "/*",
  337.         "*/",
  338.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  339.     },
  340.     {
  341.         "json",
  342.         JSON_HL_extensions,
  343.         JSON_HL_keywords,
  344.         NULL,
  345.         NULL,
  346.         NULL,
  347.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  348.     },
  349.     {
  350.         "xml",
  351.         XML_HL_extensions,
  352.         XML_HL_keywords,
  353.         NULL,
  354.         NULL,
  355.         NULL,
  356.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  357.     },
  358.     {
  359.         "sql",
  360.         SQL_HL_extensions,
  361.         SQL_HL_keywords,
  362.         "--",
  363.         "/*",
  364.         "*/",
  365.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  366.     },
  367.     {
  368.         "ruby",
  369.         RUBY_HL_extensions,
  370.         RUBY_HL_keywords,
  371.         "#",
  372.         "=begin",
  373.         "=end",
  374.         HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
  375.     }
  376. };
  377.  
  378. // Size of the "Hightlight Database" (HL_DB).
  379. #define HL_DB_ENTRIES (sizeof(HL_DB) / sizeof(HL_DB[0]))
  380.  
  381. /*** Declarations section ***/
  382.  
  383. void editorClearScreen();
  384.  
  385. void editorRefreshScreen();
  386.  
  387. void editorSetStatusMessage(const char* msg, ...);
  388.  
  389. void consoleBufferOpen();
  390.  
  391. void abufFree();
  392.  
  393. void abufAppend();
  394.  
  395. char *editorPrompt(char* prompt, void (*callback)(char*, int));
  396.  
  397. void editorRowAppendString(editor_row* row, char* s, size_t len);
  398.  
  399. void editorInsertNewline();
  400.  
  401. /*** Terminal section ***/
  402.  
  403. void die(const char* s) {
  404.     editorClearScreen();
  405.     // perror looks for global errno variable and then prints
  406.     // a descriptive error mesage for it.
  407.     perror(s);
  408.     printf("\r\n");
  409.     con_exit(0); /// KOS console
  410.     exit(1);
  411. }
  412.  
  413. void disableRawMode() {
  414. ///    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &ec.orig_termios) == -1)
  415. ///        die("Failed to disable raw mode");
  416. }
  417.  
  418. void enableRawMode() {
  419.     // Save original terminal state into orig_termios.
  420. ///    if (tcgetattr(STDIN_FILENO, &ec.orig_termios) == -1)
  421. ///        die("Failed to get current terminal state");
  422.     // At exit, restore the original state.
  423. ///    atexit(disableRawMode);
  424. ///
  425. /*
  426.     // Modify the original state to enter in raw mode.
  427.     struct termios raw = ec.orig_termios;
  428.     // This disables Ctrl-M, Ctrl-S and Ctrl-Q commands.
  429.     // (BRKINT, INPCK and ISTRIP are not estrictly mandatory,
  430.     // but it is recommended to turn them off in case any
  431.     // system needs it).
  432.     raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
  433.     // Turning off all output processing (\r\n).
  434.     raw.c_oflag &= ~(OPOST);
  435.     // Setting character size to 8 bits per byte (it should be
  436.     // like that on most systems, but whatever).
  437.     raw.c_cflag |= (CS8);
  438.     // Using NOT operator on ECHO | ICANON | IEXTEN | ISIG and
  439.     // then bitwise-AND them with flags field in order to
  440.     // force c_lflag 4th bit to become 0. This disables
  441.     // chars being printed (ECHO) and let us turn off
  442.     // canonical mode in order to read input byte-by-byte
  443.     // instead of line-by-line (ICANON), ISIG disables
  444.     // Ctrl-C command and IEXTEN the Ctrl-V one.
  445.     raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
  446.     // read() function now returns as soon as there is any
  447.     // input to be read.
  448.     raw.c_cc[VMIN] = 0;
  449.     // Forcing read() function to return every 1/10 of a
  450.     // second if there is nothing to read.
  451.     raw.c_cc[VTIME] = 1;
  452. */
  453.     consoleBufferOpen();
  454.  
  455. ///    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
  456. ///        die("Failed to set raw mode");
  457. }
  458.  
  459.  
  460.  
  461. /// by Siemargl rewritten, still Ctrl+ combination works only in english locale, so need analyze scancode
  462. int editorReadKey() {
  463.     int key = con_getch2();
  464.     if (key == 0)
  465.                 die("Window closed by moused X-button");
  466.  
  467.         if (0 != (key & 0xff)) {
  468.                 key &= 0xff;
  469.                 switch (key) {
  470.                         case 27: // ESC
  471.                                 return '\x1b';
  472.  
  473.                         case 13: // ENTER
  474.                                 return '\r';
  475.  
  476.                         case 8: // BACKSPACE
  477.                                 return BACKSPACE;
  478.  
  479.                         case 9: // TAB
  480.                                 return  key;
  481.                                
  482.                         case 22: // Ctrl+V
  483.                                 return CTRL_KEY('v');
  484.                                
  485.                         case 3: // Ctrl+C
  486.                                 return CTRL_KEY('c');
  487.                                
  488.                         case 12: // Ctrl+L
  489.                                 return CTRL_KEY('l');
  490.  
  491.                         case 17: // Ctrl+Q
  492.                         case 26: // Ctrl+Z
  493.                                 return CTRL_KEY('q');
  494.  
  495.                         case 19: // Ctrl+S
  496.                                 return CTRL_KEY('s');
  497.  
  498.                         case 5: // Ctrl+E
  499.                                 return CTRL_KEY('e');
  500.  
  501.                         case 4: // Ctrl+D
  502.                                 return CTRL_KEY('d');
  503.  
  504.                         case 6: // Ctrl+F
  505.                                 return CTRL_KEY('f');
  506.  
  507.                         case 8: // Ctrl+H
  508.                                 return CTRL_KEY('h');
  509.  
  510.                         case 24: // Ctrl+X
  511.                                 return CTRL_KEY('x');
  512.                                
  513.                         default:
  514.                                 return  key;
  515.  
  516.                 }
  517.         } else {
  518.                 key = (key >> 8) & 0xff;
  519.                 switch (key) {
  520.                         case 83: // Del
  521.                                 return DEL_KEY;
  522.  
  523.                         case 75: // Left
  524.                                 return ARROW_LEFT;
  525.                                
  526.                         case 77: // Right
  527.                                 return ARROW_RIGHT;
  528.  
  529.                         case 72: // Up
  530.                                 return ARROW_UP;
  531.  
  532.                         case 80: // Down
  533.                                 return ARROW_DOWN;
  534.  
  535.                         case 81: // PgDn
  536.                                 return PAGE_DOWN;
  537.                                
  538.                         case 73: // PgUp
  539.                                 return PAGE_UP;
  540.                                
  541.                         case 71: // Home
  542.                                 return HOME_KEY;
  543.                                
  544.                         case 79: // End
  545.                                 return END_KEY;
  546.                                
  547.                         default:
  548.                                 return  0;
  549.                 }
  550.         }
  551.         return  0;
  552. }
  553.  
  554.  
  555.  
  556.  
  557.  
  558. int getWindowSize(int* screen_rows, int* screen_cols) {
  559. ///    struct winsize ws;
  560.  
  561.     // Getting window size thanks to ioctl into the given
  562.     // winsize struct.
  563.     /*
  564.     if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
  565.         return -1;
  566.     } else {
  567.         *screen_cols = ws.ws_col;
  568.         *screen_rows = ws.ws_row;
  569.         return 0;
  570.     }
  571.     */
  572.     *screen_cols = con_def_wnd_width;
  573.     *screen_rows = con_def_wnd_height;
  574. }
  575.  
  576. void editorUpdateWindowSize() {
  577.     if (getWindowSize(&ec.screen_rows, &ec.screen_cols) == -1)
  578.         die("Failed to get window size");
  579.     ec.screen_rows -= 2; // Room for the status bar.
  580. }
  581.  
  582. void editorHandleSigwinch() {
  583.     editorUpdateWindowSize();
  584.     if (ec.cursor_y > ec.screen_rows)
  585.         ec.cursor_y = ec.screen_rows - 1;
  586.     if (ec.cursor_x > ec.screen_cols)
  587.         ec.cursor_x = ec.screen_cols - 1;
  588.     editorRefreshScreen();
  589. }
  590.  
  591. void editorHandleSigcont() {
  592.     disableRawMode();
  593.     consoleBufferOpen();
  594.     enableRawMode();
  595.     editorRefreshScreen();
  596. }
  597.  
  598. void consoleBufferOpen() {
  599.     // Switch to another terminal buffer in order to be able to restore state at exit
  600.     // by calling consoleBufferClose().
  601. ///    if (write(STDOUT_FILENO, "\x1b[?47h", 6) == -1)
  602. ///        die("Error changing terminal buffer");
  603. }
  604.  
  605. void consoleBufferClose() {
  606.     // Restore console to the state tte opened.
  607. ///    if (write(STDOUT_FILENO, "\x1b[?9l", 5) == -1 ||
  608. ///        write(STDOUT_FILENO, "\x1b[?47l", 6) == -1)
  609. ///        die("Error restoring buffer state");
  610.  
  611.     /*struct a_buf ab = {.buf = NULL, .len = 0};
  612.     char* buf = NULL;
  613.     if (asprintf(&buf, "\x1b[%d;%dH\r\n", ec.screen_rows + 1, 1) == -1)
  614.         die("Error restoring buffer state");
  615.     abufAppend(&ab, buf, strlen(buf));
  616.     free(buf);
  617.  
  618.     if (write(STDOUT_FILENO, ab.buf, ab.len) == -1)
  619.         die("Error restoring buffer state");
  620.     abufFree(&ab);*/
  621.  
  622.     editorClearScreen();
  623. }
  624.  
  625. /*** Syntax highlighting ***/
  626.  
  627. int isSeparator(int c) {
  628.     // strchr() looks to see if any one of the characters in the first string
  629.     // appear in the second string. If so, it returns a pointer to the
  630.     // character in the second string that matched. Otherwise, it
  631.     // returns NULL.
  632.     return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[]:;", c) != NULL;
  633. }
  634.  
  635. int isAlsoNumber(int c) {
  636.     return c == '.' || c == 'x' || c == 'a' || c == 'b' || c == 'c' || c == 'd' || c == 'e' || c == 'f';
  637. }
  638.  
  639. void editorUpdateSyntax(editor_row* row) {
  640.     row -> highlight = realloc(row -> highlight, row -> render_size);
  641.     // void * memset ( void * ptr, int value, size_t num );
  642.     // Sets the first num bytes of the block of memory pointed by ptr to
  643.     // the specified value. With this we set all characters to HL_NORMAL.
  644.     memset(row -> highlight, HL_NORMAL, row -> render_size);
  645.  
  646.     if (ec.syntax == NULL)
  647.         return;
  648.  
  649.     char** keywords = ec.syntax -> keywords;
  650.  
  651.     char* scs = ec.syntax -> singleline_comment_start;
  652.     char* mcs = ec.syntax -> multiline_comment_start;
  653.     char* mce = ec.syntax -> multiline_comment_end;
  654.  
  655.     int scs_len = scs ? strlen(scs) : 0;
  656.     int mcs_len = mcs ? strlen(mcs) : 0;
  657.     int mce_len = mce ? strlen(mce) : 0;
  658.  
  659.     int prev_sep = 1; // True (1) if the previous char is a separator, false otherwise.
  660.     int in_string = 0; // If != 0, inside a string. We also keep track if it's ' or "
  661.     int in_comment = (row -> idx > 0 && ec.row[row -> idx - 1].hl_open_comment); // This is ONLY used on ML comments.
  662.  
  663.     int i = 0;
  664.     while (i < row -> render_size) {
  665.         char c = row -> render[i];
  666.         // Highlight type of the previous character.
  667.         unsigned char prev_highlight = (i > 0) ? row -> highlight[i - 1] : HL_NORMAL;
  668.  
  669.         if (scs_len && !in_string && !in_comment) {
  670.             // int strncmp ( const char * str1, const char * str2, size_t num );
  671.             // Compares up to num characters of the C string str1 to those of the C string str2.
  672.             // This function starts comparing the first character of each string. If they are
  673.             // equal to each other, it continues with the following pairs until the characters
  674.             // differ, until a terminating null-character is reached, or until num characters
  675.             // match in both strings, whichever happens first.
  676.             if (!strncmp(&row -> render[i], scs, scs_len)) {
  677.                 memset(&row -> highlight[i], HL_SL_COMMENT, row -> render_size - i);
  678.                 break;
  679.             }
  680.         }
  681.  
  682.         if (mcs_len && mce_len && !in_string) {
  683.             if (in_comment) {
  684.                 row -> highlight[i] = HL_ML_COMMENT;
  685.                 if (!strncmp(&row -> render[i], mce, mce_len)) {
  686.                     memset(&row -> highlight[i], HL_ML_COMMENT, mce_len);
  687.                     i += mce_len;
  688.                     in_comment = 0;
  689.                     prev_sep = 1;
  690.                     continue;
  691.                 } else {
  692.                     i++;
  693.                     continue;
  694.                 }
  695.             } else if (!strncmp(&row -> render[i], mcs, mcs_len)) {
  696.                 memset(&row -> highlight[i], HL_ML_COMMENT, mcs_len);
  697.                 i += mcs_len;
  698.                 in_comment = 1;
  699.                 continue;
  700.             }
  701.  
  702.         }
  703.  
  704.         if (ec.syntax -> flags & HL_HIGHLIGHT_STRINGS) {
  705.             if (in_string) {
  706.                 row -> highlight[i] = HL_STRING;
  707.                 // If we’re in a string and the current character is a backslash (\),
  708.                 // and there’s at least one more character in that line that comes
  709.                 // after the backslash, then we highlight the character that comes
  710.                 // after the backslash with HL_STRING and consume it. We increment
  711.                 // i by 2 to consume both characters at once.
  712.                 if (c == '\\' && i + 1 < row -> render_size) {
  713.                     row -> highlight[i + 1] = HL_STRING;
  714.                     i += 2;
  715.                     continue;
  716.                 }
  717.  
  718.                 if (c == in_string)
  719.                     in_string = 0;
  720.                 i++;
  721.                 prev_sep = 1;
  722.                 continue;
  723.             } else {
  724.                 if (c == '"' || c == '\'') {
  725.                     in_string = c;
  726.                     row -> highlight[i] = HL_STRING;
  727.                     i++;
  728.                     continue;
  729.                 }
  730.             }
  731.         }
  732.  
  733.         if (ec.syntax -> flags & HL_HIGHLIGHT_NUMBERS) {
  734.             if ((isdigit(c) && (prev_sep || prev_highlight == HL_NUMBER)) ||
  735.                 (isAlsoNumber(c) && prev_highlight == HL_NUMBER)) {
  736.                 row -> highlight[i] = HL_NUMBER;
  737.                 i++;
  738.                 prev_sep = 0;
  739.                 continue;
  740.             }
  741.         }
  742.  
  743.         if (prev_sep) {
  744.             int j;
  745.             for (j = 0; keywords[j]; j++) {
  746.                 int kw_len = strlen(keywords[j]);
  747.                 int kw_2 = keywords[j][kw_len - 1] == '|';
  748.                 if (kw_2)
  749.                     kw_len--;
  750.  
  751.                 // Keywords require a separator both before and after the keyword.
  752.                 if (!strncmp(&row -> render[i], keywords[j], kw_len) &&
  753.                     isSeparator(row -> render[i + kw_len])) {
  754.                     memset(&row -> highlight[i], kw_2 ? HL_KEYWORD_2 : HL_KEYWORD_1, kw_len);
  755.                     i += kw_len;
  756.                     break;
  757.                 }
  758.             }
  759.             if (keywords[j] != NULL) {
  760.                 prev_sep = 0;
  761.                 continue;
  762.             }
  763.         }
  764.  
  765.         prev_sep = isSeparator(c);
  766.         i++;
  767.     }
  768.  
  769.     int changed = (row -> hl_open_comment != in_comment);
  770.     // This tells us whether the row ended as an unclosed multi-line
  771.     // comment or not.
  772.     row -> hl_open_comment = in_comment;
  773.     // A user could comment out an entire file just by changing one line.
  774.     // So it seems like we need to update the syntax of all the lines
  775.     // following the current line. However, we know the highlighting
  776.     // of the next line will not change if the value of this line’s
  777.     // // // hl_open_comment did not change. So we check if it changed, and
  778.     // // only call editorUpdateSyntax() on the next line if
  779.     // hl_open_comment changed (and if there is a next line in the file).
  780.     // Because editorUpdateSyntax() keeps calling itself with the next
  781.     // line, the change will continue to propagate to more and more lines
  782.     // until one of them is unchanged, at which point we know that all
  783.     // the lines after that one must be unchanged as well.
  784.     if (changed && row -> idx + 1 < ec.num_rows)
  785.         editorUpdateSyntax(&ec.row[row -> idx + 1]);
  786. }
  787.  
  788. int editorSyntaxToColor(int highlight) {
  789.     // We return ANSI codes for colors.
  790.     // See https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
  791.     // for a list of them.
  792.     switch (highlight) {
  793.         case HL_SL_COMMENT:
  794.         case HL_ML_COMMENT: return 36;
  795.         case HL_KEYWORD_1: return 31;
  796.         case HL_KEYWORD_2: return 32;
  797.         case HL_STRING: return 33;
  798.         case HL_NUMBER: return 35;
  799.         case HL_MATCH: return 34;
  800.         default: return 37;
  801.     }
  802. }
  803.  
  804. void editorSelectSyntaxHighlight() {
  805.     ec.syntax = NULL;
  806.     if (ec.file_name == NULL)
  807.         return;
  808.  
  809.     for (unsigned int j = 0; j < HL_DB_ENTRIES; j++) {
  810.         struct editor_syntax* es = &HL_DB[j];
  811.         unsigned int i = 0;
  812.  
  813.         while (es -> file_match[i]) {
  814.             char* p = strstr(ec.file_name, es -> file_match[i]);
  815.             if (p != NULL) {
  816.                 // Returns a pointer to the first occurrence of str2 in str1,
  817.                 // or a null pointer if str2 is not part of str1.
  818.                 int pat_len = strlen(es -> file_match[i]);
  819.                 if (es -> file_match[i][0] != '.' || p[pat_len] == '\0') {
  820.                     ec.syntax = es;
  821.  
  822.                     int file_row;
  823.                     for (file_row = 0; file_row < ec.num_rows; file_row++) {
  824.                         editorUpdateSyntax(&ec.row[file_row]);
  825.                     }
  826.  
  827.                     return;
  828.                 }
  829.             }
  830.             i++;
  831.         }
  832.     }
  833. }
  834.  
  835. /*** Row operations ***/
  836.  
  837. int editorRowCursorXToRenderX(editor_row* row, int cursor_x) {
  838.     int render_x = 0;
  839.     int j;
  840.     // For each character, if its a tab we use rx % TTE_TAB_STOP
  841.     // to find out how many columns we are to the right of the last
  842.     // tab stop, and then subtract that from TTE_TAB_STOP - 1 to
  843.     // find out how many columns we are to the left of the next tab
  844.     // stop. We add that amount to rx to get just to the left of the
  845.     // next tab stop, and then the unconditional rx++ statement gets
  846.     // us right on the next tab stop. Notice how this works even if
  847.     // we are currently on a tab stop.
  848.     for (j = 0; j < cursor_x; j++) {
  849.         if (row -> chars[j] == '\t')
  850.             render_x += (TTE_TAB_STOP - 1) - (render_x % TTE_TAB_STOP);
  851.         render_x++;
  852.     }
  853.     return render_x;
  854. }
  855.  
  856. int editorRowRenderXToCursorX(editor_row* row, int render_x) {
  857.     int cur_render_x = 0;
  858.     int cursor_x;
  859.     for (cursor_x = 0; cursor_x < row -> size; cursor_x++) {
  860.         if (row -> chars[cursor_x] == '\t')
  861.             cur_render_x += (TTE_TAB_STOP - 1) - (cur_render_x % TTE_TAB_STOP);
  862.         cur_render_x++;
  863.  
  864.         if (cur_render_x > render_x)
  865.             return cursor_x;
  866.     }
  867.     return cursor_x;
  868. }
  869.  
  870. void editorUpdateRow(editor_row* row) {
  871.     // First, we have to loop through the chars of the row
  872.     // and count the tabs in order to know how much memory
  873.     // to allocate for render. The maximum number of characters
  874.     // needed for each tab is 8. row->size already counts 1 for
  875.     // each tab, so we multiply the number of tabs by 7 and add
  876.     // that to row->size to get the maximum amount of memory we'll
  877.     // need for the rendered row.
  878.     int tabs = 0;
  879.     int j;
  880.     for (j = 0; j < row -> size; j++) {
  881.         if (row -> chars[j] == '\t')
  882.             tabs++;
  883.     }
  884.     free(row -> render);
  885.     row -> render = malloc(row -> size + tabs * (TTE_TAB_STOP - 1) + 1);
  886.  
  887.     // After allocating the memory, we check whether the current character
  888.     // is a tab. If it is, we append one space (because each tab must
  889.     // advance the cursor forward at least one column), and then append
  890.     // spaces until we get to a tab stop, which is a column that is
  891.     // divisible by 8
  892.     int idx = 0;
  893.     for (j = 0; j < row -> size; j++) {
  894.         if (row -> chars[j] == '\t') {
  895.             row -> render[idx++] = ' ';
  896.             while (idx % TTE_TAB_STOP != 0)
  897.                 row -> render[idx++] = ' ';
  898.         } else
  899.             row -> render[idx++] = row -> chars[j];
  900.     }
  901.     row -> render[idx] = '\0';
  902.     row -> render_size = idx;
  903.  
  904.     editorUpdateSyntax(row);
  905. }
  906.  
  907. void editorInsertRow(int at, char* s, size_t line_len) {
  908.     if (at < 0 || at > ec.num_rows)
  909.         return;
  910.  
  911.     ec.row = realloc(ec.row, sizeof(editor_row) * (ec.num_rows + 1));
  912.     memmove(&ec.row[at + 1], &ec.row[at], sizeof(editor_row) * (ec.num_rows - at));
  913.  
  914.     for (int j = at + 1; j <= ec.num_rows; j++) {
  915.         ec.row[j].idx++;
  916.     }
  917.  
  918.     ec.row[at].idx = at;
  919.  
  920.     ec.row[at].size = line_len;
  921.     ec.row[at].chars = malloc(line_len + 1); // We want to add terminator char '\0' at the end
  922.     memcpy(ec.row[at].chars, s, line_len);
  923.     ec.row[at].chars[line_len] = '\0';
  924.  
  925.     ec.row[at].render_size = 0;
  926.     ec.row[at].render = NULL;
  927.     ec.row[at].highlight = NULL;
  928.     ec.row[at].hl_open_comment = 0;
  929.     editorUpdateRow(&ec.row[at]);
  930.  
  931.     ec.num_rows++;
  932.     ec.dirty++;
  933. }
  934.  
  935. void editorFreeRow(editor_row* row) {
  936.     free(row -> render);
  937.     free(row -> chars);
  938.     free(row -> highlight);
  939. }
  940.  
  941. void editorDelRow(int at) {
  942.     if (at < 0 || at >= ec.num_rows)
  943.         return;
  944.     editorFreeRow(&ec.row[at]);
  945.     memmove(&ec.row[at], &ec.row[at + 1], sizeof(editor_row) * (ec.num_rows - at - 1));
  946.  
  947.     for (int j = at; j < ec.num_rows - 1; j++) {
  948.         ec.row[j].idx--;
  949.     }
  950.  
  951.     ec.num_rows--;
  952.     ec.dirty++;
  953. }
  954.  
  955. // -1 down, 1 up
  956. void editorFlipRow(int dir) {
  957.     editor_row c_row = ec.row[ec.cursor_y];
  958.     ec.row[ec.cursor_y] = ec.row[ec.cursor_y - dir];
  959.     ec.row[ec.cursor_y - dir] = c_row;
  960.  
  961.     ec.row[ec.cursor_y].idx += dir;
  962.     ec.row[ec.cursor_y - dir].idx -= dir;
  963.  
  964.     int first = (dir == 1) ? ec.cursor_y - 1 : ec.cursor_y;
  965.     editorUpdateSyntax(&ec.row[first]);
  966.     editorUpdateSyntax(&ec.row[first] + 1);
  967.     if (ec.num_rows - ec.cursor_y > 2)
  968.       editorUpdateSyntax(&ec.row[first] + 2);
  969.  
  970.     ec.cursor_y -= dir;
  971.     ec.dirty++;
  972. }
  973.  
  974. void editorCopy(int cut) {
  975.     ec.copied_char_buffer = realloc(ec.copied_char_buffer, strlen(ec.row[ec.cursor_y].chars) + 1);
  976.     strcpy(ec.copied_char_buffer, ec.row[ec.cursor_y].chars);
  977.     editorSetStatusMessage(cut ? "Content cut" : "Content copied");
  978. }
  979.  
  980. void editorCut() {
  981.     editorCopy(-1);
  982.     editorDelRow(ec.cursor_y);
  983.     if (ec.num_rows - ec.cursor_y > 0)
  984.       editorUpdateSyntax(&ec.row[ec.cursor_y]);
  985.     if (ec.num_rows - ec.cursor_y > 1)
  986.       editorUpdateSyntax(&ec.row[ec.cursor_y + 1]);
  987.     ec.cursor_x = ec.cursor_y == ec.num_rows ? 0 : ec.row[ec.cursor_y].size;
  988. }
  989.  
  990. void editorPaste() {
  991.     if (ec.copied_char_buffer == NULL)
  992.       return;
  993.  
  994.     if (ec.cursor_y == ec.num_rows)
  995.       editorInsertRow(ec.cursor_y, ec.copied_char_buffer, strlen(ec.copied_char_buffer));
  996.     else
  997.       editorRowAppendString(&ec.row[ec.cursor_y], ec.copied_char_buffer, strlen(ec.copied_char_buffer));
  998.     ec.cursor_x += strlen(ec.copied_char_buffer);
  999. }
  1000.  
  1001. void editorRowInsertChar(editor_row* row, int at, int c) {
  1002.     if (at < 0 || at > row -> size)
  1003.         at = row -> size;
  1004.     // We need to allocate 2 bytes because we also have to make room for
  1005.     // the null byte.
  1006.     row -> chars = realloc(row -> chars, row -> size + 2);
  1007.     // memmove it's like memcpy(), but is safe to use when the source and
  1008.     // destination arrays overlap
  1009.     memmove(&row -> chars[at + 1], &row -> chars[at], row -> size - at + 1);
  1010.     row -> size++;
  1011.     row -> chars[at] = c;
  1012.     editorUpdateRow(row);
  1013.     ec.dirty++; // This way we can see "how dirty" a file is.
  1014. }
  1015.  
  1016. void editorInsertNewline() {
  1017.     // If we're at the beginning of a line, all we have to do is insert
  1018.     // a new blank row before the line we're on.
  1019.     if (ec.cursor_x == 0) {
  1020.         editorInsertRow(ec.cursor_y, "", 0);
  1021.     // Otherwise, we have to split the line we're on into two rows.
  1022.     } else {
  1023.         editor_row* row = &ec.row[ec.cursor_y];
  1024.         editorInsertRow(ec.cursor_y + 1, &row -> chars[ec.cursor_x], row -> size - ec.cursor_x);
  1025.         row = &ec.row[ec.cursor_y];
  1026.         row -> size = ec.cursor_x;
  1027.         row -> chars[row -> size] = '\0';
  1028.         editorUpdateRow(row);
  1029.     }
  1030.     ec.cursor_y++;
  1031.     ec.cursor_x = 0;
  1032. }
  1033.  
  1034. void editorRowAppendString(editor_row* row, char* s, size_t len) {
  1035.     row -> chars = realloc(row -> chars, row -> size + len + 1);
  1036.     memcpy(&row -> chars[row -> size], s, len);
  1037.     row -> size += len;
  1038.     row -> chars[row -> size] = '\0';
  1039.     editorUpdateRow(row);
  1040.     ec.dirty++;
  1041. }
  1042.  
  1043. void editorRowDelChar(editor_row* row, int at) {
  1044.     if (at < 0 || at >= row -> size)
  1045.         return;
  1046.     // Overwriting the deleted character with the characters that come
  1047.     // after it.
  1048.     memmove(&row -> chars[at], &row -> chars[at + 1], row -> size - at);
  1049.     row -> size--;
  1050.     editorUpdateRow(row);
  1051.     ec.dirty++;
  1052. }
  1053.  
  1054. /*** Editor operations ***/
  1055.  
  1056. void editorInsertChar(int c) {
  1057.     // If this is true, the cursor is on the tilde line after the end of
  1058.     // the file, so we need to append a new row to the file before inserting
  1059.     // a character there.
  1060.     if (ec.cursor_y == ec.num_rows)
  1061.         editorInsertRow(ec.num_rows, "", 0);
  1062.     editorRowInsertChar(&ec.row[ec.cursor_y], ec.cursor_x, c);
  1063.     ec.cursor_x++; // This way we can see "how dirty" a file is.
  1064. }
  1065.  
  1066. void editorDelChar() {
  1067.     // If the cursor is past the end of the file, there's nothing to delete.
  1068.     if (ec.cursor_y == ec.num_rows)
  1069.         return;
  1070.     // Cursor is at the beginning of a file, there's nothing to delete.
  1071.     if (ec.cursor_x == 0 && ec.cursor_y == 0)
  1072.         return;
  1073.  
  1074.     editor_row* row = &ec.row[ec.cursor_y];
  1075.     if (ec.cursor_x > 0) {
  1076.         editorRowDelChar(row, ec.cursor_x - 1);
  1077.         ec.cursor_x--;
  1078.     // Deleting a line and moving up all the content.
  1079.     } else {
  1080.         ec.cursor_x = ec.row[ec.cursor_y - 1].size;
  1081.         editorRowAppendString(&ec.row[ec.cursor_y -1], row -> chars, row -> size);
  1082.         editorDelRow(ec.cursor_y);
  1083.         ec.cursor_y--;
  1084.     }
  1085. }
  1086.  
  1087. /*** File I/O ***/
  1088.  
  1089. char* editorRowsToString(int* buf_len) {
  1090.     int total_len = 0;
  1091.     int j;
  1092.     // Adding up the lengths of each row of text, adding 1
  1093.     // to each one for the newline character we'll add to
  1094.     // the end of each line.
  1095.     for (j = 0; j < ec.num_rows; j++) {
  1096.         total_len += ec.row[j].size + 1
  1097.                                                         + (fileIsOd0a ? 1:0); /// winFile suppor
  1098.     }
  1099.     *buf_len = total_len;
  1100.  
  1101.     char* buf = malloc(total_len);
  1102.     char* p = buf;
  1103.     // Copying the contents of each row to the end of the
  1104.     // buffer, appending a newline character after each
  1105.     // row.
  1106.     for (j = 0; j < ec.num_rows; j++) {
  1107.         memcpy(p, ec.row[j].chars, ec.row[j].size);
  1108.         p += ec.row[j].size;
  1109.         /// winFile support
  1110.         if (fileIsOd0a) *p++ = '\r';
  1111.         *p = '\n';
  1112.         p++;
  1113.     }
  1114.  
  1115.     return buf;
  1116. }
  1117.  
  1118. extern int getline(char **buf, size_t *bufsiz, FILE *fp);
  1119.  
  1120. void editorOpen(char* file_name) {
  1121.     free(ec.file_name);
  1122.     ec.file_name = strdup(file_name);
  1123.  
  1124.     editorSelectSyntaxHighlight();
  1125.  
  1126.     FILE* file = fopen(file_name, "r+");
  1127.     if (!file)
  1128.         die("Failed to open the file");
  1129.  
  1130.     char* line = NULL;
  1131.     // Unsigned int of at least 16 bit.
  1132.     size_t line_cap = 0;
  1133.     // Bigger than int
  1134.     int line_len;  ///was ssize_t
  1135.     fileIsOd0a = 0; /// winFile support
  1136.  
  1137.     while ((line_len = getline(&line, &line_cap, file)) != -1) {
  1138.         // We already know each row represents one line of text, there's no need
  1139.         // to keep carriage return and newline characters.
  1140.         if (line_len > 0 && (line[line_len - 1] == '\n' || line[line_len - 1] == '\r'))
  1141.             line_len--;
  1142. /// Siemargl fix 0d0a windows file, save format flag
  1143.          if (line_len > 0 && line[line_len - 1] == '\r')
  1144.          {
  1145.             line_len--;
  1146.             fileIsOd0a = 1;
  1147.                  }
  1148.        editorInsertRow(ec.num_rows, line, line_len);
  1149.     }
  1150.     free(line);
  1151.     fclose(file);
  1152.     ec.dirty = 0;
  1153. }
  1154.  
  1155. void editorSave() {
  1156.     if (ec.file_name == NULL) {
  1157.         ec.file_name = editorPrompt("Save as: %s (ESC to cancel)", NULL);
  1158.         if (ec.file_name == NULL) {
  1159.             editorSetStatusMessage("Save aborted");
  1160.             return;
  1161.         }
  1162.         editorSelectSyntaxHighlight();
  1163.     }
  1164.  
  1165.     int len;
  1166.     char* buf = editorRowsToString(&len);
  1167.  
  1168. /// siemargl rewrite using standard FILE stream
  1169.         FILE *fd = fopen(ec.file_name,"w+b");
  1170.         int rc = -1;
  1171.         if (fd) {
  1172.                 if ((rc = fwrite(buf, 1, len, fd)) == len) {
  1173.                         fclose(fd);
  1174.                         free(buf);
  1175.                         ec.dirty = 0;
  1176.                         editorSetStatusMessage("%d bytes written to disk", len);
  1177.                         return;
  1178.                 }
  1179.         fclose(fd);
  1180.         }
  1181.  
  1182.     free(buf);
  1183.     editorSetStatusMessage("Cant's save file. Error occurred: %s", strerror(errno));
  1184. }
  1185.  
  1186. /*** Search section ***/
  1187.  
  1188. void editorSearchCallback(char* query, int key) {
  1189.     // Index of the row that the last match was on, -1 if there was
  1190.     // no last match.
  1191.     static int last_match = -1;
  1192.     // 1 for searching forward and -1 for searching backwards.
  1193.     static int direction = 1;
  1194.  
  1195.     static int saved_highlight_line;
  1196.     static char* saved_hightlight = NULL;
  1197.  
  1198.     if (saved_hightlight) {
  1199.         memcpy(ec.row[saved_highlight_line].highlight, saved_hightlight, ec.row[saved_highlight_line].render_size);
  1200.         free(saved_hightlight);
  1201.         saved_hightlight = NULL;
  1202.     }
  1203.  
  1204.     // Checking if the user pressed Enter or Escape, in which case
  1205.     // they are leaving search mode so we return immediately.
  1206.     if (key == '\r' || key == '\x1b') {
  1207.         last_match = -1;
  1208.         direction = 1;
  1209.         return;
  1210.     } else if (key == ARROW_RIGHT || key == ARROW_DOWN) {
  1211.         direction = 1;
  1212.     } else if (key == ARROW_LEFT || key == ARROW_UP) {
  1213.         if (last_match == -1) {
  1214.             // If nothing matched and the left or up arrow key was pressed
  1215.             return;
  1216.         }
  1217.         direction = -1;
  1218.     } else {
  1219.         last_match = -1;
  1220.         direction = 1;
  1221.     }
  1222.  
  1223.     int current = last_match;
  1224.     int i;
  1225.     for (i = 0; i < ec.num_rows; i++) {
  1226.         current += direction;
  1227.         if (current == -1)
  1228.             current = ec.num_rows - 1;
  1229.         else if (current == ec.num_rows)
  1230.             current = 0;
  1231.  
  1232.         editor_row* row = &ec.row[current];
  1233.         // We use strstr to check if query is a substring of the
  1234.         // current row. It returns NULL if there is no match,
  1235.         // oterwhise it returns a pointer to the matching substring.
  1236.         char* match = strstr(row -> render, query);
  1237.         if (match) {
  1238.             last_match = current;
  1239.             ec.cursor_y = current;
  1240.             ec.cursor_x = editorRowRenderXToCursorX(row, match - row -> render);
  1241.             // We set this like so to scroll to the bottom of the file so
  1242.             // that the next screen refresh will cause the matching line to
  1243.             // be at the very top of the screen.
  1244.             ec.row_offset = ec.num_rows;
  1245.  
  1246.             saved_highlight_line = current;
  1247.             saved_hightlight = malloc(row -> render_size);
  1248.             memcpy(saved_hightlight, row -> highlight, row -> render_size);
  1249.             memset(&row -> highlight[match - row -> render], HL_MATCH, strlen(query));
  1250.             break;
  1251.         }
  1252.     }
  1253. }
  1254.  
  1255. void editorSearch() {
  1256.     int saved_cursor_x = ec.cursor_x;
  1257.     int saved_cursor_y = ec.cursor_y;
  1258.     int saved_col_offset = ec.col_offset;
  1259.     int saved_row_offset = ec.row_offset;
  1260.  
  1261.     char* query = editorPrompt("Search: %s (Use ESC / Enter / Arrows)", editorSearchCallback);
  1262.  
  1263.     if (query) {
  1264.         free(query);
  1265.     // If query is NULL, that means they pressed Escape, so in that case we
  1266.     // restore the cursor previous position.
  1267.     } else {
  1268.         ec.cursor_x = saved_cursor_x;
  1269.         ec.cursor_y = saved_cursor_y;
  1270.         ec.col_offset = saved_col_offset;
  1271.         ec.row_offset = saved_row_offset;
  1272.     }
  1273. }
  1274.  
  1275. /*** Append buffer section **/
  1276.  
  1277. void abufAppend(struct a_buf* ab, const char* s, int len) {
  1278.     // Using realloc to get a block of free memory that is
  1279.     // the size of the current string + the size of the string
  1280.     // to be appended.
  1281.     char* new = realloc(ab -> buf, ab -> len + len);
  1282.  
  1283.     if (new == NULL)
  1284.         return;
  1285.  
  1286.     // Copying the string s at the end of the current data in
  1287.     // the buffer.
  1288.     memcpy(&new[ab -> len], s, len);
  1289.     ab -> buf = new;
  1290.     ab -> len += len;
  1291. }
  1292.  
  1293. void abufFree(struct a_buf* ab) {
  1294.     // Deallocating buffer.
  1295.     free(ab -> buf);
  1296. }
  1297.  
  1298. /*** Output section ***/
  1299.  
  1300. void editorScroll() {
  1301.     ec.render_x = 0;
  1302.     if (ec.cursor_y < ec.num_rows)
  1303.         ec.render_x = editorRowCursorXToRenderX(&ec.row[ec.cursor_y], ec.cursor_x);
  1304.     // The first if statement checks if the cursor is above the visible window,
  1305.     // and if so, scrolls up to where the cursor is. The second if statement checks
  1306.     // if the cursor is past the bottom of the visible window, and contains slightly
  1307.     // more complicated arithmetic because ec.row_offset refers to what's at the top
  1308.     // of the screen, and we have to get ec.screen_rows involved to talk about what's
  1309.     // at the bottom of the screen.
  1310.     if (ec.cursor_y < ec.row_offset)
  1311.         ec.row_offset = ec.cursor_y;
  1312.     if (ec.cursor_y >= ec.row_offset + ec.screen_rows)
  1313.         ec.row_offset = ec.cursor_y - ec.screen_rows + 1;
  1314.  
  1315.     if (ec.render_x < ec.col_offset)
  1316.         ec.col_offset = ec.render_x;
  1317.     if (ec.render_x >= ec.col_offset + ec.screen_cols)
  1318.         ec.col_offset = ec.render_x - ec.screen_cols + 1;
  1319. }
  1320.  
  1321. void editorDrawStatusBar(struct a_buf* ab) {
  1322.     // This switches to inverted colors.
  1323.     // NOTE:
  1324.     // The m command (Select Graphic Rendition) causes the text printed
  1325.     // after it to be printed with various possible attributes including
  1326.     // bold (1), underscore (4), blink (5), and inverted colors (7). An
  1327.     // argument of 0 clears all attributes (the default one). See
  1328.     // http://vt100.net/docs/vt100-ug/chapter3.html#SGR for more info.
  1329.     abufAppend(ab, "\x1b[7m", 4);
  1330.  
  1331.     char status[80], r_status[80];
  1332.     // Showing up to 20 characters of the filename, followed by the number of lines.
  1333.     int len = snprintf(status, sizeof(status), " Editing: %.20s %s", ec.file_name ? ec.file_name : "New file", ec.dirty ? "(modified)" : "");
  1334.     int col_size = ec.row && ec.cursor_y <= ec.num_rows - 1 ? col_size = ec.row[ec.cursor_y].size : 0;
  1335.     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,
  1336.         ec.cursor_x + 1 > col_size ? col_size : ec.cursor_x + 1, col_size);
  1337.     if (len > ec.screen_cols)
  1338.         len = ec.screen_cols;
  1339.     abufAppend(ab, status, len);
  1340.     while (len < ec.screen_cols) {
  1341.         if (ec.screen_cols - len == r_len) {
  1342.             abufAppend(ab, r_status, r_len);
  1343.             break;
  1344.         } else {
  1345.             abufAppend(ab, " ", 1);
  1346.             len++;
  1347.         }
  1348.     }
  1349.     // This switches back to normal colors.
  1350.     abufAppend(ab, "\x1b[m", 3);
  1351.  
  1352.     abufAppend(ab, "\r\n", 2);
  1353. }
  1354.  
  1355. void editorDrawMessageBar(struct a_buf *ab) {
  1356.     // Clearing the message bar.
  1357. ///    abufAppend(ab, "\x1b[K", 3);     /// not work in Kolibri
  1358.     int msg_len = strlen(ec.status_msg);
  1359.     if (msg_len > ec.screen_cols)
  1360.         msg_len = ec.screen_cols;
  1361.     // We only show the message if its less than 5 secons old, but
  1362.     // remember the screen is only being refreshed after each keypress.
  1363.     if (msg_len && time(NULL) - ec.status_msg_time < 5)
  1364.         abufAppend(ab, ec.status_msg, msg_len);
  1365. }
  1366.  
  1367. void editorDrawWelcomeMessage(struct a_buf* ab) {
  1368.     char welcome[80];
  1369.     // Using snprintf to truncate message in case the terminal
  1370.     // is too tiny to handle the entire string.
  1371.     int welcome_len = snprintf(welcome, sizeof(welcome),
  1372.         "TinyTextEditor %s", TTE_VERSION);
  1373.     if (welcome_len > ec.screen_cols)
  1374.         welcome_len = ec.screen_cols;
  1375.     // Centering the message.
  1376.     int padding = (ec.screen_cols - welcome_len) / 2;
  1377.     // Remember that everything != 0 is true.
  1378.     if (padding) {
  1379.         abufAppend(ab, "~", 1);
  1380.         padding--;
  1381.     }
  1382.     while (padding--)
  1383.         abufAppend(ab, " ", 1);
  1384.     abufAppend(ab, welcome, welcome_len);
  1385. }
  1386.  
  1387. // The ... argument makes editorSetStatusMessage() a variadic function,
  1388. // meaning it can take any number of arguments. C's way of dealing with
  1389. // these arguments is by having you call va_start() and va_end() on a
  1390. // // value of type va_list. The last argument before the ... (in this
  1391. // case, msg) must be passed to va_start(), so that the address of
  1392. // the next arguments is known. Then, between the va_start() and
  1393. // va_end() calls, you would call va_arg() and pass it the type of
  1394. // the next argument (which you usually get from the given format
  1395. // string) and it would return the value of that argument. In
  1396. // this case, we pass msg and args to vsnprintf() and it takes care
  1397. // of reading the format string and calling va_arg() to get each
  1398. // argument.
  1399. void editorSetStatusMessage(const char* msg, ...) {
  1400.     va_list args;
  1401.     va_start(args, msg);
  1402.     vsnprintf(ec.status_msg, sizeof(ec.status_msg), msg, args);
  1403.     va_end(args);
  1404.     ec.status_msg_time = time(NULL);
  1405. }
  1406.  
  1407. void editorDrawRows(struct a_buf* ab) {
  1408.     int y;
  1409.     for (y = 0; y < ec.screen_rows; y++) {
  1410.         int file_row = y + ec.row_offset;
  1411.         if(file_row >= ec.num_rows) {
  1412.             if (ec.num_rows == 0 && y == ec.screen_rows / 3)
  1413.                 editorDrawWelcomeMessage(ab);
  1414.             else
  1415.                 abufAppend(ab, "~", 1);
  1416.         } else {
  1417.             int len = ec.row[file_row].render_size - ec.col_offset;
  1418.             // len can be a negative number, meaning the user scrolled
  1419.             // horizontally past the end of the line. In that case, we set
  1420.             // len to 0 so that nothing is displayed on that line.
  1421.             if (len < 0)
  1422.                 len = 0;
  1423.             if (len > ec.screen_cols)
  1424.                 len = ec.screen_cols;
  1425.  
  1426.             char* c = &ec.row[file_row].render[ec.col_offset];
  1427.             unsigned char* highlight = &ec.row[file_row].highlight[ec.col_offset];
  1428.             int current_color = -1;
  1429.             int j;
  1430.             for (j = 0; j < len; j++) {
  1431.                 // Displaying nonprintable characters as (A-Z, @, and ?).
  1432.                 if (iscntrl(c[j])) {
  1433.                     char sym = (c[j] <= 26) ? '@' + c[j] : '?';
  1434.                     abufAppend(ab, "\x1b[7m", 4);
  1435.                     abufAppend(ab, &sym, 1);
  1436.                     abufAppend(ab, "\x1b[m", 3);
  1437.                     if (current_color != -1) {
  1438.                         char buf[16];
  1439.                         int c_len = snprintf(buf, sizeof(buf), "\x1b[%dm", current_color);
  1440.                         abufAppend(ab, buf, c_len);
  1441.                     }
  1442.                 } else if (highlight[j] == HL_NORMAL) {
  1443.                     if (current_color != -1) {
  1444.                         abufAppend(ab, "\x1b[m", 3);  /// was [39, 5
  1445.                         current_color = -1;
  1446.                     }
  1447.                     abufAppend(ab, &c[j], 1);
  1448.                 } else {
  1449.                     int color = editorSyntaxToColor(highlight[j]);
  1450.                     // We only use escape sequence if the new color is different
  1451.                     // from the last character's color.
  1452.                     if (color != current_color) {
  1453.                         current_color = color;
  1454.                         char buf[16];
  1455.                         int c_len = snprintf(buf, sizeof(buf), "\x1b[%dm", color);
  1456.                         abufAppend(ab, buf, c_len);
  1457.                     }
  1458.  
  1459.                     abufAppend(ab, &c[j], 1);
  1460.                 }
  1461.             }
  1462.             abufAppend(ab, "\x1b[m", 3);  /// was [39, 5
  1463.         }
  1464.  
  1465.         // Redrawing each line instead of the whole screen.
  1466. ///        abufAppend(ab, "\x1b[K", 3);  /// not work in Kolibri
  1467.         // Addind a new line
  1468.         abufAppend(ab, "\r\n", 2);
  1469.     }
  1470. }
  1471.  
  1472. void editorRefreshScreen() {
  1473.     editorScroll();
  1474.  
  1475.     struct a_buf ab = ABUF_INIT;
  1476.  
  1477.     // Hiding the cursor while the screen is refreshing.
  1478.     // See http://vt100.net/docs/vt100-ug/chapter3.html#S3.3.4
  1479.     // for more info.
  1480. ///    abufAppend(&ab, "\x1b[?25l", 6);
  1481.     abufAppend(&ab, "\x1b[H", 3);
  1482.  
  1483. /// full clear because "\x1b[K" not work in Kolibri
  1484.     abufAppend(&ab, "\x1b[2J", 4);
  1485.  
  1486.     editorDrawRows(&ab);
  1487.     editorDrawStatusBar(&ab);
  1488.     editorDrawMessageBar(&ab);
  1489.  
  1490.     // Moving the cursor where it should be.
  1491.     char buf[32];
  1492. ///    snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (ec.cursor_y - ec.row_offset) + 1, (ec.render_x - ec.col_offset) + 1);
  1493. /// a bit different in Kolibri
  1494.     snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (ec.render_x - ec.col_offset), (ec.cursor_y - ec.row_offset));
  1495.        abufAppend(&ab, buf, strlen(buf));
  1496.  
  1497.     // Showing again the cursor.
  1498. ///    abufAppend(&ab, "\x1b[?25h", 6);
  1499.  
  1500.     // Writing all content at once
  1501. ///    write(STDOUT_FILENO, ab.buf, ab.len);
  1502.         con_write_string(ab.buf, ab.len);
  1503.     abufFree(&ab);
  1504. }
  1505.  
  1506. void editorClearScreen() {
  1507.     // Writing 4 bytes out to the terminal:
  1508.     // - (1 byte) \x1b : escape character
  1509.     // - (3 bytes) [2J : Clears the entire screen, see
  1510.     // http://vt100.net/docs/vt100-ug/chapter3.html#ED
  1511.     // for more info.
  1512. ///    write(STDOUT_FILENO, "\x1b[2J", 4);
  1513.         con_write_string("\x1b[2J", 4);
  1514.  
  1515.     // Writing 3 bytes to reposition the cursor back at
  1516.     // the top-left corner, see
  1517.     // http://vt100.net/docs/vt100-ug/chapter3.html#CUP
  1518.     // for more info.
  1519. ///    write(STDOUT_FILENO, "\x1b[H", 3);
  1520.         con_write_string("\x1b[H", 3);
  1521. }
  1522.  
  1523. /*** Input section ***/
  1524.  
  1525. char* editorPrompt(char* prompt, void (*callback)(char*, int)) {
  1526.     size_t buf_size = 128;
  1527.     char* buf = malloc(buf_size);
  1528.  
  1529.     size_t buf_len = 0;
  1530.     buf[0] = '\0';
  1531.  
  1532.     while (1) {
  1533.         editorSetStatusMessage(prompt, buf);
  1534.         editorRefreshScreen();
  1535.  
  1536.         int c = editorReadKey();
  1537.         if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
  1538.             if (buf_len != 0)
  1539.                 buf[--buf_len] = '\0';
  1540.         } else if (c == '\x1b') {
  1541.             editorSetStatusMessage("");
  1542.             if (callback)
  1543.                 callback(buf, c);
  1544.             free(buf);
  1545.             return NULL;
  1546.         } else if (c == '\r') {
  1547.             if (buf_len != 0) {
  1548.                 editorSetStatusMessage("");
  1549.                 if (callback)
  1550.                     callback(buf, c);
  1551.                 return buf;
  1552.             }
  1553.         } else if (!iscntrl(c) && isprint(c)) {
  1554.             if (buf_len == buf_size - 1) {
  1555.                 buf_size *= 2;
  1556.                 buf = realloc(buf, buf_size);
  1557.             }
  1558.             buf[buf_len++] = c;
  1559.             buf[buf_len] = '\0';
  1560.         }
  1561.  
  1562.         if (callback)
  1563.             callback(buf, c);
  1564.     }
  1565. }
  1566.  
  1567. void editorMoveCursor(int key) {
  1568.     editor_row* row = (ec.cursor_y >= ec.num_rows) ? NULL : &ec.row[ec.cursor_y];
  1569.  
  1570.     switch (key) {
  1571.         case ARROW_LEFT:
  1572.             if (ec.cursor_x != 0)
  1573.                 ec.cursor_x--;
  1574.             // If <- is pressed, move to the end of the previous line
  1575.             else if (ec.cursor_y > 0) {
  1576.                 ec.cursor_y--;
  1577.                 ec.cursor_x = ec.row[ec.cursor_y].size;
  1578.             }
  1579.             break;
  1580.         case ARROW_RIGHT:
  1581.             if (row && ec.cursor_x < row -> size)
  1582.                 ec.cursor_x++;
  1583.             // If -> is pressed, move to the start of the next line
  1584.             else if (row && ec.cursor_x == row -> size) {
  1585.                 ec.cursor_y++;
  1586.                 ec.cursor_x = 0;
  1587.             }
  1588.             break;
  1589.         case ARROW_UP:
  1590.             if (ec.cursor_y != 0)
  1591.                 ec.cursor_y--;
  1592.             break;
  1593.         case ARROW_DOWN:
  1594.             if (ec.cursor_y < ec.num_rows)
  1595.                 ec.cursor_y++;
  1596.             break;
  1597.     }
  1598.  
  1599.     // Move cursor_x if it ends up past the end of the line it's on
  1600.     row = (ec.cursor_y >= ec.num_rows) ? NULL : &ec.row[ec.cursor_y];
  1601.     int row_len = row ? row -> size : 0;
  1602.     if (ec.cursor_x > row_len)
  1603.         ec.cursor_x = row_len;
  1604. }
  1605.  
  1606. void editorProcessKeypress() {
  1607.     static int quit_times = TTE_QUIT_TIMES;
  1608.  
  1609.     int c = editorReadKey();
  1610.  
  1611.     switch (c) {
  1612.         case '\r': // Enter key
  1613.             editorInsertNewline();
  1614.             break;
  1615.         case CTRL_KEY('q'):
  1616.             if (ec.dirty && quit_times > 0) {
  1617.                 editorSetStatusMessage("Warning! File has unsaved changes. Press Ctrl-Q or ^Z %d more time%s to quit", quit_times, quit_times > 1 ? "s" : "");
  1618.                 quit_times--;
  1619.                 return;
  1620.             }
  1621.             editorClearScreen();
  1622.             consoleBufferClose();
  1623.             con_exit(1); /// KOS console
  1624.             exit(0);
  1625.             break;
  1626.         case CTRL_KEY('s'):
  1627.             editorSave();
  1628.             break;
  1629.         case CTRL_KEY('e'):
  1630.             if (ec.cursor_y > 0 && ec.cursor_y <= ec.num_rows - 1)
  1631.                 editorFlipRow(1);
  1632.             break;
  1633.         case CTRL_KEY('d'):
  1634.             if (ec.cursor_y < ec.num_rows - 1)
  1635.             editorFlipRow(-1);
  1636.             break;
  1637.         case CTRL_KEY('x'):
  1638.             if (ec.cursor_y < ec.num_rows)
  1639.             editorCut();
  1640.             break;
  1641.         case CTRL_KEY('c'):
  1642.             if (ec.cursor_y < ec.num_rows)
  1643.             editorCopy(0);
  1644.             break;
  1645.         case CTRL_KEY('v'):
  1646.             editorPaste();
  1647.             break;
  1648. ///        case CTRL_KEY('p'):
  1649. ///            consoleBufferClose();
  1650. ///            kill(0, SIGTSTP);
  1651.         case ARROW_UP:
  1652.         case ARROW_DOWN:
  1653.         case ARROW_LEFT:
  1654.         case ARROW_RIGHT:
  1655.             editorMoveCursor(c);
  1656.             break;
  1657.         case PAGE_UP:
  1658.         case PAGE_DOWN:
  1659.             { // You can't declare variables directly inside a switch statement.
  1660.                 if (c == PAGE_UP)
  1661.                     ec.cursor_y = ec.row_offset;
  1662.                 else if (c == PAGE_DOWN)
  1663.                     ec.cursor_y = ec.row_offset + ec.screen_rows - 1;
  1664.  
  1665.                 int times = ec.screen_rows;
  1666.                 while (times--)
  1667.                     editorMoveCursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
  1668.             }
  1669.             break;
  1670.         case HOME_KEY:
  1671.             ec.cursor_x = 0;
  1672.             break;
  1673.         case END_KEY:
  1674.             if (ec.cursor_y < ec.num_rows)
  1675.                 ec.cursor_x = ec.row[ec.cursor_y].size;
  1676.             break;
  1677.         case CTRL_KEY('f'):
  1678.             editorSearch();
  1679.             break;
  1680.         case BACKSPACE:
  1681.         case CTRL_KEY('h'):
  1682.         case DEL_KEY:
  1683.             if (c == DEL_KEY)
  1684.                 editorMoveCursor(ARROW_RIGHT);
  1685.             editorDelChar();
  1686.             break;
  1687.         case CTRL_KEY('l'):
  1688.         case '\x1b': // Escape key
  1689.             break;
  1690.         default:
  1691.             editorInsertChar(c);
  1692.             break;
  1693.     }
  1694.  
  1695.     quit_times = TTE_QUIT_TIMES;
  1696. }
  1697.  
  1698. /*** Init section ***/
  1699.  
  1700. void initEditor() {
  1701.     ec.cursor_x = 0;
  1702.     ec.cursor_y = 0;
  1703.     ec.render_x = 0;
  1704.     ec.row_offset = 0;
  1705.     ec.col_offset = 0;
  1706.     ec.num_rows = 0;
  1707.     ec.row = NULL;
  1708.     ec.dirty = 0;
  1709.     ec.file_name = NULL;
  1710.     ec.status_msg[0] = '\0';
  1711.     ec.status_msg_time = 0;
  1712.     ec.copied_char_buffer = NULL;
  1713.     ec.syntax = NULL;
  1714.  
  1715.     editorUpdateWindowSize();
  1716.     // The SIGWINCH signal is sent to a process when its controlling
  1717.     // terminal changes its size (a window change).
  1718. ///    signal(SIGWINCH, editorHandleSigwinch);
  1719.     // The SIGCONT signal instructs the operating system to continue
  1720.     // (restart) a process previously paused by the SIGSTOP or SIGTSTP
  1721.     // signal.
  1722. ///    signal(SIGCONT, editorHandleSigcont);
  1723. }
  1724.  
  1725. void printHelp() {
  1726.     printf("Usage: tte [OPTIONS] [FILE]\n\n");
  1727.     printf("\nKEYBINDINGS\n-----------\n\n");
  1728.     printf("Keybinding\t\tAction\n\n");
  1729.     printf("Ctrl-Q,^Z \t\tExit\n");
  1730.     printf("Ctrl-S    \t\tSave\n");
  1731.     printf("Ctrl-F    \t\tSearch. Esc, enter and arrows to interact once searching\n");
  1732.     printf("Ctrl-E    \t\tFlip line upwards\n");
  1733.     printf("Ctrl-D    \t\tFlip line downwards\n");
  1734.     printf("Ctrl-C    \t\tCopy line\n");
  1735.     printf("Ctrl-X    \t\tCut line\n");
  1736.     printf("Ctrl-V    \t\tPaste line\n");
  1737.  ///   printf("Ctrl-P    \t\tPause tte (type \"fg\" to resume)\n");
  1738.  
  1739.     printf("\n\nOPTIONS\n-------\n\n");
  1740.     printf("Option        \t\tAction\n\n");
  1741.     printf("-h | --help   \t\tPrints the help\n");
  1742.     printf("-v | --version\t\tPrints the version of tte\n");
  1743.  
  1744.     printf("\n\nFor now, usage of ISO 8859-1 is recommended.\n");
  1745. }
  1746.  
  1747. // 1 if editor should open, 0 otherwise, -1 if the program should exit
  1748. int handleArgs(int argc, char* argv[]) {
  1749.     if (argc == 1)
  1750.         return 0;
  1751.  
  1752.     if (argc >= 2) {
  1753.         if (strncmp("-h", argv[1], 2) == 0 || strncmp("--help", argv[1], 6) == 0) {
  1754.             printHelp();
  1755.             return -1;
  1756.         } else if(strncmp("-v", argv[1], 2) == 0 || strncmp("--version", argv[1], 9) == 0) {
  1757.             printf("tte - version %s\n", TTE_VERSION);
  1758.             return -1;
  1759.         }
  1760.     }
  1761.  
  1762.     return 1;
  1763. }
  1764.  
  1765. int main(int argc, char* argv[]) {
  1766.         if (con_init_console_dll()) return 1; // init fail
  1767.         con_set_title("TinyTextEditor");
  1768.     initEditor();
  1769.     int arg_response = handleArgs(argc, argv);
  1770.     if (arg_response == 1) {
  1771.                 editorOpen(argv[1]);
  1772.                 char* title = argv[1];
  1773.                 strcat(title, " - TinyTextEditor");
  1774.                 con_set_title(title);
  1775.         }  
  1776.     else if (arg_response == -1)
  1777.         return 0;
  1778.     enableRawMode();
  1779.     editorSetStatusMessage(" Ctrl-Q, ^Z to quit | Ctrl-S to save | (tte -h | --help for more info)");
  1780.  
  1781.     while (1) {
  1782.         editorRefreshScreen();
  1783.         editorProcessKeypress();
  1784.     }
  1785.  
  1786.         con_exit(1);
  1787.     return 0;
  1788. }
  1789.