2019-12-28 06:26:00 +00:00
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//
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// includes
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// --------
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2019-12-29 07:05:31 +00:00
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#define _DEFAULT_SOURCE
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#define _BSD_SOURCE
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#define _GNU_SOURCE
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2019-12-28 06:26:00 +00:00
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#include <ctype.h>
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#include <errno.h>
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2019-12-31 03:52:43 +00:00
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#include <fcntl.h>
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2019-12-28 06:26:00 +00:00
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#include <stdio.h>
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2019-12-31 03:52:43 +00:00
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#include <stdarg.h>
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2019-12-28 06:26:00 +00:00
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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2019-12-29 07:05:31 +00:00
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#include <sys/types.h>
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2019-12-28 06:26:00 +00:00
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#include <termios.h>
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2019-12-31 03:52:43 +00:00
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#include <time.h>
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2019-12-28 06:26:00 +00:00
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#include <unistd.h>
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2019-12-31 03:52:43 +00:00
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#include "config.h"
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2019-12-28 06:26:00 +00:00
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//
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// definitions
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// -----------
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2020-01-01 19:21:00 +00:00
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#define HERMES_VERSION "0.5"
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2019-12-28 06:26:00 +00:00
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#define CTRL_KEY(k) ((k) & 0x1f)
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2019-12-31 23:54:43 +00:00
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#define HL_HIGHLIGHT_NUMBERS (1<<0)
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2020-01-01 06:29:05 +00:00
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#define HL_HIGHLIGHT_STRINGS (1<<1)
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2019-12-28 06:26:00 +00:00
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2019-12-31 03:52:43 +00:00
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//
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// definitions for config file
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// ---------------------------
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2019-12-28 06:26:00 +00:00
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enum editorMode {CommandMode, InputMode, VisualMode};
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2019-12-31 23:54:43 +00:00
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enum editorHighlight {
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2020-01-01 06:29:05 +00:00
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HL_NORMAL = 0,
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HL_STRING,
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HL_COMMENT,
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HL_MLCOMMENT,
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HL_KEYWORD1,
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HL_KEYWORD2,
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2019-12-31 23:54:43 +00:00
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HL_NUMBER
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};
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2019-12-28 06:26:00 +00:00
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enum editorKey {
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2019-12-29 02:21:29 +00:00
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BACKSPACE = 127,
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2019-12-28 06:26:00 +00:00
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ARROW_LEFT = 1000,
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ARROW_RIGHT,
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ARROW_UP,
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ARROW_DOWN,
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PAGE_UP,
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PAGE_DOWN,
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2019-12-29 02:21:29 +00:00
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DEL_KEY,
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HOME_KEY,
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END_KEY
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2019-12-28 06:26:00 +00:00
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};
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//
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// data
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// ----
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2019-12-29 07:05:31 +00:00
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typedef struct erow {
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2020-01-01 06:29:05 +00:00
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int idx;
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2019-12-29 07:05:31 +00:00
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int size;
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2019-12-31 03:52:43 +00:00
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int rendersize;
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2019-12-29 07:05:31 +00:00
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char *chars;
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2019-12-31 03:52:43 +00:00
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char *render;
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2019-12-31 23:54:43 +00:00
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unsigned char *hl;
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2020-01-01 06:29:05 +00:00
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int hl_open_comment;
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2019-12-29 07:05:31 +00:00
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} erow;
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2019-12-28 06:26:00 +00:00
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struct editorConfig {
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enum editorMode mode;
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2019-12-29 07:05:31 +00:00
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int rowoff;
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2019-12-31 03:52:43 +00:00
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int coloff;
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int cx, cy, rx;
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2019-12-28 06:26:00 +00:00
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int screenRows;
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int screenCols;
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2019-12-29 07:05:31 +00:00
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int numRows;
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2019-12-31 03:52:43 +00:00
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int unsaved;
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2019-12-29 07:05:31 +00:00
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erow *row;
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2019-12-31 03:52:43 +00:00
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char *filename;
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char statusmsg[80];
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time_t statusmsg_time;
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2019-12-29 07:05:31 +00:00
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struct termios orig_termios;
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2019-12-31 23:54:43 +00:00
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struct editorSyntax *syntax;
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};
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struct editorSyntax {
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char *filetype;
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char **filematch;
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2020-01-01 06:29:05 +00:00
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char *singleline_comment_start;
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char *multiline_comment_start;
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char *multiline_comment_end;
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char **keywords;
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2019-12-31 23:54:43 +00:00
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int flags;
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2019-12-28 06:26:00 +00:00
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};
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struct editorConfig E;
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2019-12-31 23:54:43 +00:00
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//
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// filetypes
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// ---------
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char *C_HL_extensions[] = {".c", ".h", ".cpp", NULL};
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2020-01-01 06:29:05 +00:00
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char *C_HL_keywords[] = {
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"switch", "if", "while", "for", "break", "return", "else", "continue",
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"struct|", "union", "typedef", "static", "enum|", "class", "case|",
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"int|", "long|", "double|", "float|", "char|", "unsigned|", "signed|",
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"void|", "NULL", NULL
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};
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char *PY_HL_extensions[] = {".py", ".pyc", NULL};
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char *PY_HL_keywords[] = {
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"if", "elif", "for", "break", "return", "else",
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"def", "", "static", "enum", "class", "with", "assert",
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"except", "continue", "while", "finally", "try", "global",
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"False|", "True|", "None|", "not|", "and|", "as|", "yield|",
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"void|", "or|", "import|", "is|", "in|", "lambda|", "pass|",
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"raise|", "del|", NULL
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};
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char *GO_HL_extensions[] = {".go", NULL};
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char *GO_HL_keywords[] = {
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"break", "switch", "continue", "func", "interface", "select",
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"case", "defer", "go", "map", "struct", "chan", "else", "goto",
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"package", "const", "fallthrough|", "if", "range|", "type",
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"for", "import", "return", "var", "uint8|", "uint16|", "uint32|",
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"uint64", "int|", "uint|", "int8|", "int16|", "int32|", "int64|",
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"float32|", "float", "float64|", "complex64|", "complex128|",
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"byte|", "rune|", "uintptr|", "string|", "bool|", NULL
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};
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2019-12-31 23:54:43 +00:00
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struct editorSyntax HLDB[] = {
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{
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"c",
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C_HL_extensions,
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2020-01-01 06:29:05 +00:00
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"//",
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"/*",
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"*/",
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C_HL_keywords,
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HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
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},
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{
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"python",
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PY_HL_extensions,
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"#",
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"'''",
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"'''",
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PY_HL_keywords,
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HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
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2019-12-31 23:54:43 +00:00
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},
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2020-01-01 06:29:05 +00:00
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{
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"go",
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GO_HL_extensions,
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"//",
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"/*",
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"*/",
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GO_HL_keywords,
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HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
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}
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2019-12-31 23:54:43 +00:00
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};
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#define HLDB_ENTRIES (sizeof(HLDB) / sizeof(HLDB[0]))
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2019-12-31 03:52:43 +00:00
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//
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// prototypes
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// ----------
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void editorStatusMessage(const char *fmt, ...);
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void editorRefreshScreen();
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char *editorPrompt(char *prompt);
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2019-12-29 07:05:31 +00:00
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2019-12-28 06:26:00 +00:00
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//
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// terminal
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// --------
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void die(const char *s) {
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write(STDOUT_FILENO, "\033[2J", 4);
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write(STDOUT_FILENO, "\033[H", 3);
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perror(s);
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write(STDOUT_FILENO, "\r", 1);
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exit(1);
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}
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void quit() {
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write(STDOUT_FILENO, "\033[2J", 4);
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write(STDOUT_FILENO, "\033[H", 3);
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exit(0);
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}
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void disableRawMode() {
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &E.orig_termios) == -1)
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die("tcsetattr");
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}
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void enableRawMode() {
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if (tcgetattr(STDIN_FILENO, &E.orig_termios) == -1) die("tcgetattr");
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atexit(disableRawMode);
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struct termios raw = E.orig_termios;
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raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
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raw.c_oflag &= ~(OPOST);
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raw.c_cflag |= ~(CS8);
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raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
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raw.c_cc[VMIN] = 0;
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raw.c_cc[VTIME] = 1;
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) die("tcsetattr");
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}
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int editorReadKey() {
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int nread;
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char c;
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while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
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if (nread == -1 && errno != EAGAIN) die("read");
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}
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if (c == '\033') {
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char seq[3];
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if (read(STDIN_FILENO, &seq[0], 1) != 1) return '\033';
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if (read(STDIN_FILENO, &seq[1], 1) != 1) return '\033';
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if (seq[0] == '[') {
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2019-12-29 02:21:29 +00:00
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if (seq[1] >= '0' && seq[1] <= '9') {
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if (read(STDIN_FILENO, &seq[2], 1) != 1) return '\033';
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if (seq[2] == '~') {
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switch (seq[1]) {
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case '1': return HOME_KEY;
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case '3': return DEL_KEY;
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case '4': return END_KEY;
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case '5': return PAGE_UP;
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case '6': return PAGE_DOWN;
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case '7': return HOME_KEY;
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case '8': return END_KEY;
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}
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}
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} else {
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switch (seq[1]) {
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case 'A': return ARROW_UP;
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case 'B': return ARROW_DOWN;
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case 'C': return ARROW_RIGHT;
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case 'D': return ARROW_LEFT;
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case 'H': return HOME_KEY;
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case 'F': return END_KEY;
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}
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}
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} else if (seq[0] == 'O') {
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2019-12-28 06:26:00 +00:00
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switch (seq[1]) {
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2019-12-29 02:21:29 +00:00
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case 'H': return HOME_KEY;
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case 'F': return END_KEY;
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2019-12-28 06:26:00 +00:00
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}
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}
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return '\033';
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}
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return c;
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}
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int getCursorPosition(int *rows, int *cols) {
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char buf[32];
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unsigned int i = 0;
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if (write(STDOUT_FILENO, "\033[6n", 4) != 4) return -1;
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printf("\r\n");
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while (i < sizeof(buf) - 1) {
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if (read(STDIN_FILENO, &buf[i], 1) != 1) break;
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if (buf[i] == 'R') break;
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i++;
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}
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buf[i] = '\0';
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if (buf[0] != '\033' || buf[1] != '[') return -1;
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if (scanf(&buf[2], "%d;%d", rows, cols) != 2) return -1;
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return 0;
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}
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int getWindowSize(int *rows, int *cols) {
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struct winsize ws;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
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if (write(STDOUT_FILENO, "\033[999C\033[999B", 12) != 12) return -1;
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return getCursorPosition(rows, cols);
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}
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*cols = ws.ws_col;
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*rows = ws.ws_row;
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return 0;
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}
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2019-12-31 23:54:43 +00:00
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//
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// syntax highlighting
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// -------------------
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int is_separator(int c) {
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return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[];", c) != NULL;
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}
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void editorUpdateSyntax(erow *row) {
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row->hl = realloc(row->hl, row->rendersize);
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memset(row->hl, HL_NORMAL, row->rendersize);
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if (E.syntax == NULL) return;
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2020-01-01 06:29:05 +00:00
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char **keywords = E.syntax->keywords;
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char *scs = E.syntax->singleline_comment_start;
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char *mcs = E.syntax->multiline_comment_start;
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char *mce = E.syntax->multiline_comment_end;
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int scs_len = scs ? strlen(scs) : 0;
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int mcs_len = mcs ? strlen(mcs) : 0;
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int mce_len = mce ? strlen(mce) : 0;
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2019-12-31 23:54:43 +00:00
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int prev_sep = 1;
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2020-01-01 06:29:05 +00:00
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int in_string = 0;
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int in_comment = (row->idx > 0 && E.row[row->idx - 1].hl_open_comment);
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2019-12-31 23:54:43 +00:00
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2020-01-01 06:29:05 +00:00
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int i = 0;
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while (i < row->rendersize) {
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2019-12-31 23:54:43 +00:00
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char c = row->render[i];
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unsigned char prev_hl = (i > 0) ? row->hl[i - 1] : HL_NORMAL;
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2020-01-01 06:29:05 +00:00
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if (scs_len && !in_string && !in_comment) {
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if (!strncmp(&row->render[i], scs, scs_len)) {
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memset(&row->hl[i], HL_COMMENT, row->rendersize - i);
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break;
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}
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}
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|
if (mcs_len && mce_len && !in_string) {
|
|
|
|
if (in_comment) {
|
|
|
|
row->hl[i] = HL_MLCOMMENT;
|
|
|
|
if (!strncmp(&row->render[i], mce, mce_len)) {
|
|
|
|
memset(&row->hl[i], HL_MLCOMMENT, 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->hl[i], HL_MLCOMMENT, mcs_len);
|
|
|
|
i += mcs_len;
|
|
|
|
in_comment = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (E.syntax->flags & HL_HIGHLIGHT_STRINGS) {
|
|
|
|
if (in_string) {
|
|
|
|
row->hl[i] = HL_STRING;
|
|
|
|
if (c == '\\' && i < row->rendersize) {
|
|
|
|
row->hl[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->hl[i] = HL_STRING;
|
|
|
|
i++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
|
|
|
|
if ((isdigit(c) && (prev_sep || prev_hl == HL_NUMBER)) ||
|
|
|
|
(c == '.' && prev_hl == HL_NUMBER)) {
|
2020-01-01 06:29:05 +00:00
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
row->hl[i] = HL_NUMBER;
|
|
|
|
i++;
|
|
|
|
prev_sep = 0;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2020-01-01 06:29:05 +00:00
|
|
|
|
|
|
|
if (prev_sep) {
|
|
|
|
int j;
|
|
|
|
for (j = 0; keywords[j]; j++) {
|
|
|
|
int klen = strlen(keywords[j]);
|
|
|
|
int kw2 = keywords[j][klen - 1] == '|';
|
|
|
|
if (kw2) klen--;
|
|
|
|
|
|
|
|
if (!strncmp(&row->render[i], keywords[j], klen) &&
|
|
|
|
is_separator(row->render[i + klen])) {
|
|
|
|
memset(&row->hl[i], kw2 ? HL_KEYWORD2 : HL_KEYWORD1, klen);
|
|
|
|
i += klen;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (keywords[j] != NULL) {
|
|
|
|
prev_sep = 0;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
prev_sep = is_separator(c);
|
|
|
|
i++;
|
|
|
|
}
|
2020-01-01 06:29:05 +00:00
|
|
|
|
|
|
|
int changed = (row->hl_open_comment != in_comment);
|
|
|
|
row->hl_open_comment = in_comment;
|
|
|
|
if (changed && row->idx + 1 < E.numRows)
|
|
|
|
editorUpdateSyntax(&E.row[row->idx + 1]);
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
|
|
|
|
2020-01-01 06:29:05 +00:00
|
|
|
unsigned int editorSyntaxToColor(int hl) {
|
2019-12-31 23:54:43 +00:00
|
|
|
switch (hl) {
|
2020-01-01 06:29:05 +00:00
|
|
|
case HL_NUMBER: return HL_NUMBER_COLOR;
|
|
|
|
case HL_STRING: return HL_STRING_COLOR;
|
|
|
|
case HL_MLCOMMENT:
|
|
|
|
case HL_COMMENT: return HL_COMMENT_COLOR;
|
|
|
|
case HL_KEYWORD1: return HL_KEYWORD1_COLOR;
|
|
|
|
case HL_KEYWORD2: return HL_KEYWORD2_COLOR;
|
|
|
|
default: return HL_DEFAULT_COLOR;
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
2020-01-01 06:29:05 +00:00
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void editorSelectSyntaxHighlight() {
|
|
|
|
E.syntax = NULL;
|
|
|
|
if (E.filename == NULL) return;
|
|
|
|
|
|
|
|
char *ext = strrchr(E.filename, '.');
|
|
|
|
|
|
|
|
for (unsigned int j = 0; j < HLDB_ENTRIES; j++) {
|
|
|
|
struct editorSyntax *s = &HLDB[j];
|
|
|
|
unsigned int i = 0;
|
|
|
|
while (s->filematch[i]) {
|
|
|
|
int is_ext = (s->filematch[i][0] == '.');
|
|
|
|
if ((is_ext && ext && !strcmp(ext, s->filematch[i])) ||
|
|
|
|
(!is_ext && strstr(E.filename, s->filematch[i]))) {
|
|
|
|
E.syntax = s;
|
2020-01-01 06:29:05 +00:00
|
|
|
|
|
|
|
int filerow;
|
|
|
|
for (filerow = 0; filerow < E.numRows; filerow++) {
|
|
|
|
editorUpdateSyntax(&E.row[filerow]);
|
|
|
|
}
|
2019-12-31 23:54:43 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
//
|
|
|
|
// row ops
|
|
|
|
// -------
|
2019-12-31 03:52:43 +00:00
|
|
|
int editorRowCxToRx(erow *row, int cx) {
|
|
|
|
int rx = 0;
|
|
|
|
int j;
|
|
|
|
for (j = 0; j < cx; j++) {
|
|
|
|
if (row->chars[j] == '\t')
|
|
|
|
rx += (tabwidth - 1) - (rx % tabwidth);
|
|
|
|
rx++;
|
|
|
|
}
|
|
|
|
return rx;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorUpdateRow(erow *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 * (tabwidth - 1) + 1);
|
|
|
|
|
|
|
|
int idx = 0;
|
|
|
|
for (j = 0; j < row->size; j++) {
|
|
|
|
if (row->chars[j] == '\t') {
|
|
|
|
row->render[idx++] = ' ';
|
|
|
|
while (idx % tabwidth != 0) row->render[idx++] = ' ';
|
|
|
|
} else {
|
|
|
|
row->render[idx++] = row->chars[j];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
row->render[idx] = '\0';
|
|
|
|
row->rendersize = idx;
|
2019-12-31 23:54:43 +00:00
|
|
|
|
|
|
|
editorUpdateSyntax(row);
|
2019-12-31 03:52:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void editorInsertRow(int at, char *s, size_t len) {
|
|
|
|
if (at < 0 || at > E.numRows) return;
|
2019-12-29 07:05:31 +00:00
|
|
|
|
|
|
|
E.row = realloc(E.row, sizeof(erow) * (E.numRows + 1));
|
2019-12-31 03:52:43 +00:00
|
|
|
memmove(&E.row[at + 1], &E.row[at], sizeof(erow) * (E.numRows - at));
|
2020-01-01 06:29:05 +00:00
|
|
|
for (int j = at + 1; j <= E.numRows; j++) E.row[j].idx++;
|
|
|
|
|
|
|
|
E.row[at].idx = at;
|
2019-12-29 07:05:31 +00:00
|
|
|
|
|
|
|
E.row[at].size = len;
|
|
|
|
E.row[at].chars = malloc(len + 1);
|
|
|
|
memcpy(E.row[at].chars, s, len);
|
|
|
|
E.row[at].chars[len] = '\0';
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
E.row[at].rendersize = 0;
|
|
|
|
E.row[at].render = NULL;
|
2019-12-31 23:54:43 +00:00
|
|
|
E.row[at].hl = NULL;
|
2020-01-01 06:29:05 +00:00
|
|
|
E.row[at].hl_open_comment = 0;
|
2019-12-31 03:52:43 +00:00
|
|
|
editorUpdateRow(&E.row[at]);
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
E.numRows++;
|
2019-12-31 03:52:43 +00:00
|
|
|
E.unsaved++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorFreeRow(erow *row) {
|
|
|
|
free(row->render);
|
|
|
|
free(row->chars);
|
2019-12-31 23:54:43 +00:00
|
|
|
free(row->hl);
|
2019-12-31 03:52:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void editorDelRow(int at) {
|
|
|
|
if (at < 0 || at >= E.numRows) return;
|
|
|
|
editorFreeRow(&E.row[at]);
|
|
|
|
memmove(&E.row[at], &E.row[at + 1], sizeof(erow) * (E.numRows - at - 1));
|
2020-01-01 06:29:05 +00:00
|
|
|
for (int j = at; j < E.numRows - 1; j++) E.row[j].idx--;
|
2019-12-31 03:52:43 +00:00
|
|
|
E.numRows--;
|
|
|
|
E.unsaved++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorRowInsertChar(erow *row, int at, int c) {
|
|
|
|
if (at < 0 || at > row->size) at = row->size;
|
|
|
|
row->chars = realloc(row->chars, row->size+2);
|
|
|
|
memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
|
|
|
|
row->size++;
|
|
|
|
row->chars[at] = c;
|
|
|
|
editorUpdateRow(row);
|
|
|
|
E.unsaved++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorRowAppendString(erow *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);
|
|
|
|
E.unsaved++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorRowDeleteChar(erow *row, int at) {
|
|
|
|
if (at < 0 || at >= row->size) return;
|
|
|
|
memmove(&row->chars[at], &row->chars[at + 1], row->size - at);
|
|
|
|
row->size--;
|
|
|
|
editorUpdateRow(row);
|
|
|
|
E.unsaved++;
|
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
|
|
// editor ops
|
|
|
|
// ----------
|
|
|
|
void editorInsertChar(int c) {
|
|
|
|
if (E.cy == E.numRows) {
|
|
|
|
editorInsertRow(E.numRows, "", 0);
|
|
|
|
}
|
|
|
|
editorRowInsertChar(&E.row[E.cy], E.cx, c);
|
|
|
|
E.cx++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorDeleteChar() {
|
|
|
|
if (E.cy == E.numRows) return;
|
|
|
|
if (E.cy == 0 && E.cx ==0) return;
|
|
|
|
erow *row = &E.row[E.cy];
|
|
|
|
if (E.cx > 0) {
|
|
|
|
editorRowDeleteChar(row, E.cx - 1);
|
|
|
|
E.cx--;
|
|
|
|
} else {
|
|
|
|
E.cx = E.row[E.cy - 1].size;
|
|
|
|
editorRowAppendString(&E.row[E.cy - 1], row->chars, row->size);
|
|
|
|
editorDelRow(E.cy);
|
|
|
|
E.cy--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorInsertNewline() {
|
|
|
|
if (E.cx == 0) {
|
|
|
|
editorInsertRow(E.cy, "", 0);
|
|
|
|
} else {
|
|
|
|
erow *row = &E.row[E.cy];
|
|
|
|
editorInsertRow(E.cy + 1, &E.row->chars[E.cx], row->size - E.cx);
|
|
|
|
row = &E.row[E.cy];
|
|
|
|
row->size = E.cx;
|
|
|
|
row->chars[row->size] = '\0';
|
|
|
|
editorUpdateRow(row);
|
|
|
|
}
|
|
|
|
E.cy++;
|
|
|
|
E.cx = 0;
|
2019-12-29 07:05:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
|
|
// file io
|
|
|
|
// -------
|
|
|
|
|
2019-12-31 03:52:43 +00:00
|
|
|
char *editorRowsToString(int *buflen) {
|
|
|
|
int totlen = 0;
|
|
|
|
int j;
|
|
|
|
for (j = 0; j < E.numRows; j++)
|
|
|
|
totlen += E.row[j].size + 1;
|
|
|
|
*buflen = totlen;
|
|
|
|
|
|
|
|
char *buf = malloc(totlen);
|
|
|
|
char *p = buf;
|
|
|
|
for (j = 0; j < E.numRows; j++) {
|
|
|
|
memcpy(p, E.row[j].chars, E.row[j].size);
|
|
|
|
p += E.row[j].size;
|
|
|
|
*p = '\n';
|
|
|
|
p++;
|
|
|
|
}
|
|
|
|
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
void editorOpen(char *filename) {
|
2019-12-31 03:52:43 +00:00
|
|
|
free(E.filename);
|
|
|
|
E.filename = strdup(filename);
|
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
editorSelectSyntaxHighlight();
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
FILE *fp = fopen(filename, "r");
|
|
|
|
if (!fp) die("Open file");
|
|
|
|
|
|
|
|
char *line = NULL;
|
|
|
|
size_t linecap = 0;
|
|
|
|
ssize_t linelen;
|
|
|
|
while ((linelen = getline(&line, &linecap, fp)) != -1) {
|
|
|
|
while (linelen > 0 && (line[linelen - 1] == '\n' || line[linelen - 1] == '\r'))
|
|
|
|
linelen--;
|
2019-12-31 03:52:43 +00:00
|
|
|
editorInsertRow(E.numRows, line, linelen);
|
2019-12-29 07:05:31 +00:00
|
|
|
|
|
|
|
}
|
2020-01-01 06:29:05 +00:00
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
free(line);
|
|
|
|
fclose(fp);
|
2019-12-31 03:52:43 +00:00
|
|
|
E.unsaved = 0;
|
|
|
|
}
|
|
|
|
|
2019-12-31 23:54:43 +00:00
|
|
|
void editorSave(int saveAs) {
|
|
|
|
if (E.filename == NULL || saveAs) {
|
2019-12-31 03:52:43 +00:00
|
|
|
E.filename = editorPrompt("Save as: %s");
|
|
|
|
if (E.filename == NULL) {
|
|
|
|
E.filename = NULL;
|
|
|
|
editorStatusMessage("Save cancelled");
|
|
|
|
return;
|
|
|
|
}
|
2019-12-31 23:54:43 +00:00
|
|
|
editorSelectSyntaxHighlight();
|
2019-12-31 03:52:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int len;
|
|
|
|
char *buf = editorRowsToString(&len);
|
|
|
|
|
|
|
|
int fd = open(E.filename, O_RDWR | O_CREAT, 0644);
|
|
|
|
if (fd != -1) {
|
|
|
|
if (ftruncate(fd, len) != -1) {
|
|
|
|
if (write(fd, buf, len) == len) {
|
|
|
|
close(fd);
|
|
|
|
free(buf);
|
|
|
|
E.unsaved = 0;
|
|
|
|
editorStatusMessage("%d bytes saved to disk", len);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
close(fd);
|
|
|
|
}
|
|
|
|
free(buf);
|
|
|
|
editorStatusMessage("Can't save! i/o error: %s", strerror(errno));
|
2019-12-29 07:05:31 +00:00
|
|
|
}
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
//
|
|
|
|
// append buffer
|
|
|
|
// -------------
|
|
|
|
struct abuf {
|
|
|
|
char *b;
|
|
|
|
int len;
|
|
|
|
};
|
|
|
|
|
|
|
|
#define ABUF_INIT {NULL, 0}
|
|
|
|
|
|
|
|
void abAppend(struct abuf *ab, const char *s, int len) {
|
|
|
|
char *new = realloc(ab->b, ab->len + len);
|
|
|
|
|
|
|
|
if (new == NULL) return;
|
|
|
|
memcpy(&new[ab->len], s, len);
|
|
|
|
ab->b = new;
|
|
|
|
ab->len += len;
|
|
|
|
}
|
|
|
|
|
|
|
|
void abFree(struct abuf *ab) {
|
|
|
|
free(ab->b);
|
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
|
|
// output
|
|
|
|
// ------
|
2019-12-29 07:05:31 +00:00
|
|
|
void editorScroll() {
|
2019-12-31 03:52:43 +00:00
|
|
|
E.rx = E.cx;
|
|
|
|
if (E.cy < E.numRows) {
|
|
|
|
E.rx = editorRowCxToRx(&E.row[E.cy], E.cx);
|
|
|
|
}
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
if (E.cy < E.rowoff) {
|
|
|
|
E.rowoff = E.cy;
|
|
|
|
}
|
|
|
|
if (E.cy >= E.rowoff + E.screenRows) {
|
|
|
|
E.rowoff = E.cy - E.screenRows + 1;
|
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
if (E.rx < E.coloff) {
|
|
|
|
E.coloff = E.rx;
|
|
|
|
}
|
|
|
|
if (E.rx >= E.coloff + E.screenCols) {
|
|
|
|
E.coloff = E.rx - E.screenCols + 1;
|
|
|
|
}
|
2019-12-29 07:05:31 +00:00
|
|
|
}
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
void editorDrawRows(struct abuf *ab) {
|
|
|
|
int y;
|
|
|
|
for (y = 0; y < E.screenRows; y++) {
|
2019-12-29 07:05:31 +00:00
|
|
|
int filerow = y + E.rowoff;
|
|
|
|
if (filerow >= E.numRows) {
|
|
|
|
if (E.numRows == 0 && y == E.screenRows / 3) {
|
|
|
|
char welcome[80];
|
2020-01-01 19:21:00 +00:00
|
|
|
int welcomelen = snprintf(welcome, sizeof(welcome), "[ hermes ] - version %s", HERMES_VERSION);
|
2019-12-29 07:05:31 +00:00
|
|
|
if (welcomelen > E.screenCols) welcomelen = E.screenCols;
|
|
|
|
int padding = (E.screenCols - welcomelen) / 2;
|
|
|
|
if (padding) {
|
|
|
|
abAppend(ab, "~", 1);
|
|
|
|
padding--;
|
|
|
|
}
|
|
|
|
while (padding--) abAppend(ab, " ", 1);
|
|
|
|
abAppend(ab, welcome, welcomelen);
|
|
|
|
} else {
|
2019-12-28 06:26:00 +00:00
|
|
|
abAppend(ab, "~", 1);
|
|
|
|
}
|
|
|
|
} else {
|
2019-12-31 03:52:43 +00:00
|
|
|
int len = E.row[filerow].rendersize - E.coloff;
|
|
|
|
if (len < 0) len = 0;
|
2019-12-29 07:05:31 +00:00
|
|
|
if (len > E.screenCols) len = E.screenCols;
|
2019-12-31 23:54:43 +00:00
|
|
|
char *c = &E.row[filerow].render[E.coloff];
|
|
|
|
unsigned char *hl = &E.row[filerow].hl[E.coloff];
|
2020-01-01 06:29:05 +00:00
|
|
|
int current_color = -1;
|
2019-12-31 23:54:43 +00:00
|
|
|
int j;
|
|
|
|
for (j = 0; j < len; j++) {
|
2020-01-01 06:29:05 +00:00
|
|
|
if (iscntrl(c[j])) {
|
|
|
|
char sym = (c[j] <= 26) ? '@' + c[j] : '?';
|
|
|
|
abAppend(ab, "\033[7m", 4);
|
|
|
|
abAppend(ab, &sym, 1);
|
|
|
|
abAppend(ab, "\033[m", 3);
|
|
|
|
char bgcolor[16];
|
|
|
|
int bglen = sprintf(bgcolor, "\033[48;5;%dm", EDITOR_BG_COLOR);
|
|
|
|
abAppend(ab, bgcolor, bglen);
|
|
|
|
if (current_color != -1) {
|
|
|
|
char buf[16];
|
|
|
|
int clen = snprintf(buf, sizeof(buf), "\033[%dm", current_color);
|
|
|
|
abAppend(ab, buf, clen);
|
|
|
|
}
|
|
|
|
} else if (hl[j] == HL_NORMAL) {
|
2019-12-31 23:54:43 +00:00
|
|
|
if (current_color != -1) {
|
|
|
|
abAppend(ab, "\033[39m", 5);
|
|
|
|
current_color = -1;
|
|
|
|
}
|
|
|
|
abAppend(ab, &c[j], 1);
|
|
|
|
} else {
|
|
|
|
int color = editorSyntaxToColor(hl[j]);
|
|
|
|
if (color != current_color) {
|
|
|
|
current_color = color;
|
|
|
|
char buf[16];
|
2020-01-01 06:29:05 +00:00
|
|
|
int clen = snprintf(buf, sizeof(buf), "\033[38;5;%dm", color);
|
2019-12-31 23:54:43 +00:00
|
|
|
abAppend(ab, buf, clen);
|
|
|
|
}
|
|
|
|
abAppend(ab, &c[j], 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
abAppend(ab, "\033[39m", 5);
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
abAppend(ab, "\033[K", 3);
|
2019-12-31 03:52:43 +00:00
|
|
|
abAppend(ab, "\r\n", 2);
|
|
|
|
}
|
|
|
|
}
|
2019-12-28 06:26:00 +00:00
|
|
|
|
2019-12-31 03:52:43 +00:00
|
|
|
void editorDrawStatusBar(struct abuf *ab) {
|
|
|
|
abAppend(ab, "\033[7m", 4);
|
|
|
|
char status[80], rstatus[80];
|
|
|
|
|
2020-01-01 06:29:05 +00:00
|
|
|
char *editorMode;
|
2019-12-31 03:52:43 +00:00
|
|
|
switch (E.mode) {
|
|
|
|
case CommandMode:
|
2020-01-01 06:29:05 +00:00
|
|
|
editorMode = "Command";
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case InputMode:
|
2020-01-01 06:29:05 +00:00
|
|
|
editorMode = "Input";
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case VisualMode:
|
2020-01-01 06:29:05 +00:00
|
|
|
editorMode = "Visual";
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
}
|
2020-01-01 06:29:05 +00:00
|
|
|
|
|
|
|
char *filename = E.filename ? basename(E.filename) : "[unnamed file]";
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
int len = snprintf(status, sizeof(status), "%.20s - %d lines %s",
|
2020-01-01 06:29:05 +00:00
|
|
|
filename, E.numRows, E.unsaved ? "(modified)" : "");
|
|
|
|
int rlen = snprintf(rstatus, sizeof(rstatus), "<%s> %d:%d/%d [%s] ",
|
2019-12-31 23:54:43 +00:00
|
|
|
E.syntax ? E.syntax->filetype : "generic" ,E.cx, E.cy + 1, E.numRows, editorMode);
|
2019-12-31 03:52:43 +00:00
|
|
|
if (len > E.screenCols) len = E.screenCols;
|
|
|
|
abAppend(ab, status, len);
|
|
|
|
while (len < E.screenCols) {
|
|
|
|
if (E.screenCols - len == rlen) {
|
|
|
|
abAppend(ab, rstatus, rlen);
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
abAppend(ab, " ", 1);
|
|
|
|
len++;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
abAppend(ab, "\033[m", 4);
|
2020-01-01 06:29:05 +00:00
|
|
|
char bgcolor[16];
|
|
|
|
int bglen = sprintf(bgcolor, "\033[48;5;%dm", EDITOR_BG_COLOR);
|
|
|
|
abAppend(ab, bgcolor, bglen);
|
2019-12-31 03:52:43 +00:00
|
|
|
abAppend(ab, "\r\n", 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorDrawMsgBar(struct abuf *ab) {
|
|
|
|
abAppend(ab, "\033[K", 3);
|
|
|
|
int msglen = strlen(E.statusmsg);
|
|
|
|
if (msglen > E.screenCols) msglen = E.screenCols;
|
|
|
|
if (msglen && time(NULL) - E.statusmsg_time < 5)
|
|
|
|
abAppend(ab, E.statusmsg, msglen);
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void editorRefreshScreen() {
|
2020-01-01 06:29:05 +00:00
|
|
|
editorScroll();
|
2019-12-29 07:05:31 +00:00
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
struct abuf ab = ABUF_INIT;
|
|
|
|
|
|
|
|
abAppend(&ab, "\033[?25l", 6);
|
|
|
|
abAppend(&ab, "\033[H", 3);
|
2020-01-01 06:29:05 +00:00
|
|
|
char bgcolor[16];
|
|
|
|
int bglen = sprintf(bgcolor, "\033[48;5;%dm", EDITOR_BG_COLOR);
|
|
|
|
abAppend(&ab, bgcolor, bglen);
|
2019-12-28 06:26:00 +00:00
|
|
|
editorDrawRows(&ab);
|
2019-12-31 03:52:43 +00:00
|
|
|
editorDrawStatusBar(&ab);
|
|
|
|
editorDrawMsgBar(&ab);
|
2019-12-28 06:26:00 +00:00
|
|
|
|
|
|
|
char buf[32];
|
2019-12-31 03:52:43 +00:00
|
|
|
snprintf(buf, sizeof(buf), "\033[%d;%dH", (E.cy - E.rowoff) + 1, (E.rx - E.coloff) + 1);
|
2019-12-28 06:26:00 +00:00
|
|
|
abAppend(&ab, buf, strlen(buf));
|
|
|
|
|
|
|
|
abAppend(&ab, "\033[?25h", 6);
|
|
|
|
|
|
|
|
write(STDOUT_FILENO, ab.b, ab.len);
|
|
|
|
abFree(&ab);
|
|
|
|
}
|
|
|
|
|
2019-12-31 03:52:43 +00:00
|
|
|
void editorStatusMessage(const char *fmt, ...) {
|
|
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
|
|
vsnprintf(E.statusmsg, sizeof(E.statusmsg), fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
E.statusmsg_time = time(NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorPrevWord() {
|
|
|
|
int x = E.cx;
|
|
|
|
int y = E.cy;
|
|
|
|
int moved = 0;
|
2019-12-31 23:54:43 +00:00
|
|
|
erow *row = (y >= E.numRows || y < 0) ? NULL : &E.row[y];
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
while (row) {
|
|
|
|
if (moved && row->chars[x] != ' ' && row->chars[x] != '\t' && (x == 0 || row->chars[x - 1] == ' ' || row->chars[x - 1] == '\t')) {
|
|
|
|
// EXIT cond
|
|
|
|
E.cx = x;
|
|
|
|
E.cy = y;
|
|
|
|
break;
|
|
|
|
} else if (x == 0) {
|
|
|
|
y--;
|
2019-12-31 23:54:43 +00:00
|
|
|
row = (y >= E.numRows || y < 0) ? NULL : &E.row[y];
|
2019-12-31 03:52:43 +00:00
|
|
|
if (!row) return;
|
|
|
|
x = row->size;
|
|
|
|
moved++;
|
|
|
|
} else {
|
|
|
|
x--;
|
|
|
|
moved++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorNextWord() {
|
|
|
|
int ws = 0;
|
|
|
|
int x = E.cx;
|
|
|
|
int y = E.cy;
|
2019-12-31 23:54:43 +00:00
|
|
|
erow *row = (y >= E.numRows || y < 0) ? NULL : &E.row[y];
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
while (row) {
|
|
|
|
if (ws > 0 && row->chars[x] != ' ' && row->chars[x] != '\t') {
|
|
|
|
E.cx = x;
|
|
|
|
E.cy = y;
|
|
|
|
break;
|
|
|
|
} else if (row->chars[x] == ' ' || row->chars[x] == '\t') {
|
|
|
|
x++;
|
|
|
|
ws++;
|
|
|
|
} else if (x + 1 >= row->size) {
|
|
|
|
y++;
|
|
|
|
x = 0;
|
|
|
|
ws++;
|
2019-12-31 23:54:43 +00:00
|
|
|
row = (y >= E.numRows || y < 0) ? NULL : &E.row[y];
|
2019-12-31 03:52:43 +00:00
|
|
|
if (!row) return;
|
|
|
|
} else {
|
|
|
|
x++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorEndOfWord() {
|
|
|
|
int x = E.cx;
|
|
|
|
int y = E.cy;
|
|
|
|
erow *row = (y >= E.numRows) ? NULL : &E.row[y];
|
|
|
|
|
2020-01-01 19:21:00 +00:00
|
|
|
while (x + 1 >= row->size) {
|
|
|
|
if (y + 1 < E.numRows) {
|
|
|
|
x = 0;
|
|
|
|
y++;
|
|
|
|
row = &E.row[y];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (row->chars[x + 1] == ' ' || row->chars[x + 1] == '\t') {
|
|
|
|
x++;
|
|
|
|
}
|
|
|
|
|
2019-12-31 03:52:43 +00:00
|
|
|
while (1) {
|
|
|
|
if (row->chars[x] != ' ' && row->chars[x] != '\t' && (x + 1 >= row->size || (row->chars[x + 1] == ' ' || row->chars[x + 1] == '\t'))) {
|
|
|
|
E.cx = x;
|
|
|
|
E.cy = y;
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
x++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
//
|
|
|
|
// input
|
|
|
|
// -----
|
2019-12-31 03:52:43 +00:00
|
|
|
char *editorPrompt(char *prompt) {
|
|
|
|
size_t bufsize = 128;
|
|
|
|
char *buf = malloc(bufsize);
|
|
|
|
|
|
|
|
size_t buflen = 0;
|
|
|
|
buf[0] = '\0';
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
editorStatusMessage(prompt, buf);
|
|
|
|
editorRefreshScreen();
|
|
|
|
|
|
|
|
int c = editorReadKey();
|
|
|
|
if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
|
|
|
|
if (buflen != 0) buf[--buflen] = '\0';
|
|
|
|
} else if (c == '\033') {
|
|
|
|
editorStatusMessage("");
|
|
|
|
free(buf);
|
|
|
|
return NULL;
|
|
|
|
} else if (c == '\r') {
|
|
|
|
if (buflen != 0) {
|
|
|
|
editorStatusMessage("");
|
|
|
|
return buf;
|
|
|
|
} else {
|
|
|
|
editorStatusMessage("");
|
|
|
|
free(buf);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
} else if (!iscntrl(c) && c < 128) {
|
|
|
|
if (buflen == bufsize - 1) {
|
|
|
|
bufsize *= 2;
|
|
|
|
buf = realloc(buf, bufsize);
|
|
|
|
}
|
|
|
|
buf[buflen++] = c;
|
|
|
|
buf[buflen] = '\0';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
void editorMoveCursor(int key) {
|
2019-12-31 03:52:43 +00:00
|
|
|
erow *row = (E.cy >= E.numRows) ? NULL : &E.row[E.cy];
|
2019-12-28 06:26:00 +00:00
|
|
|
switch (key) {
|
|
|
|
case 'j':
|
|
|
|
case ARROW_DOWN:
|
2019-12-29 07:05:31 +00:00
|
|
|
if (E.cy < E.numRows) {
|
2019-12-28 06:26:00 +00:00
|
|
|
E.cy++;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'k':
|
|
|
|
case ARROW_UP:
|
|
|
|
if (E.cy != 0) {
|
|
|
|
E.cy--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'h':
|
|
|
|
case ARROW_LEFT:
|
|
|
|
if (E.cx != 0) {
|
|
|
|
E.cx--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'l':
|
|
|
|
case ARROW_RIGHT:
|
2019-12-31 23:54:43 +00:00
|
|
|
{
|
|
|
|
int mod = E.mode == CommandMode ? 1 : 0;
|
|
|
|
if (row && E.cx < row->size - mod)
|
|
|
|
E.cx++;
|
|
|
|
break;
|
|
|
|
}
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
row = (E.cy >= E.numRows) ? NULL : &E.row[E.cy];
|
|
|
|
int rowlen = row ? row->size : 0;
|
|
|
|
if (E.cx > rowlen)
|
|
|
|
E.cx = rowlen;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
2019-12-29 02:21:29 +00:00
|
|
|
void editorPageCursor(int key) {
|
2019-12-31 03:52:43 +00:00
|
|
|
if (key == PAGE_DOWN) {
|
|
|
|
if (E.numRows < E.screenRows) {
|
|
|
|
E.cy = E.numRows - 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
E.rowoff = E.rowoff + E.screenRows;
|
|
|
|
if (E.rowoff > E.numRows - E.screenRows)
|
|
|
|
E.rowoff = E.numRows - E.screenRows;
|
|
|
|
E.cy = E.rowoff + 1;
|
|
|
|
} else if (key == PAGE_UP) {
|
|
|
|
if (E.cy < E.screenRows) {
|
|
|
|
E.cy = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
E.rowoff = E.rowoff - E.screenRows;
|
|
|
|
if (E.rowoff < 0)
|
|
|
|
E.rowoff = 0;
|
|
|
|
E.cy = E.rowoff + E.screenRows - 1;
|
2019-12-29 02:21:29 +00:00
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
|
|
|
|
erow *row = (E.cy >= E.numRows) ? NULL : &E.row[E.cy];
|
|
|
|
int rowlen = row ? row->size : 0;
|
|
|
|
if (E.cx > rowlen)
|
|
|
|
E.cx = rowlen;
|
2019-12-29 02:21:29 +00:00
|
|
|
}
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
void editorInputKp(int c) {
|
|
|
|
switch (c) {
|
|
|
|
case '\033':
|
2019-12-31 03:52:43 +00:00
|
|
|
case CTRL_KEY('l'):
|
2019-12-31 23:54:43 +00:00
|
|
|
if (E.cx == E.row[E.cy].size) editorMoveCursor(ARROW_LEFT);
|
2019-12-28 06:26:00 +00:00
|
|
|
E.mode = CommandMode;
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case '\r':
|
|
|
|
editorInsertNewline();
|
|
|
|
break;
|
|
|
|
case BACKSPACE:
|
|
|
|
case DEL_KEY:
|
|
|
|
case CTRL_KEY('h'):
|
|
|
|
if (c == DEL_KEY) editorMoveCursor(ARROW_RIGHT);
|
|
|
|
editorDeleteChar();
|
|
|
|
break;
|
2019-12-28 06:26:00 +00:00
|
|
|
default:
|
2019-12-31 03:52:43 +00:00
|
|
|
editorInsertChar(c);
|
2019-12-28 06:26:00 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void editorCommandKp(int c) {
|
2019-12-31 23:54:43 +00:00
|
|
|
static int deleting = 0;
|
|
|
|
static int counter = 1;
|
|
|
|
static int place = 1;
|
2020-01-01 19:21:00 +00:00
|
|
|
static int counting = 0;
|
2019-12-28 06:26:00 +00:00
|
|
|
switch (c) {
|
|
|
|
case 'j':
|
|
|
|
case 'k':
|
|
|
|
case 'h':
|
|
|
|
case 'l':
|
2019-12-31 23:54:43 +00:00
|
|
|
while (counter > 0) {
|
|
|
|
editorMoveCursor(c);
|
|
|
|
counter--;
|
|
|
|
}
|
2019-12-28 06:26:00 +00:00
|
|
|
break;
|
2019-12-29 07:05:31 +00:00
|
|
|
case 'g':
|
|
|
|
E.cy = 0;
|
2020-01-01 19:21:00 +00:00
|
|
|
E.cx = 0;
|
2019-12-29 07:05:31 +00:00
|
|
|
break;
|
|
|
|
case 'G':
|
2019-12-31 03:52:43 +00:00
|
|
|
if (E.numRows > E.screenRows) {
|
|
|
|
E.cy = E.numRows - 1;
|
|
|
|
E.rowoff = E.numRows - E.screenRows - 1;
|
|
|
|
} else {
|
|
|
|
E.cy = E.numRows - 1;
|
|
|
|
}
|
2020-01-01 19:21:00 +00:00
|
|
|
E.cx = E.row[E.cy].size - 1;
|
|
|
|
if (E.cx < 0) E.cx = 0;
|
|
|
|
break;
|
|
|
|
case '\r':
|
|
|
|
if (counting) {
|
|
|
|
counter--;
|
|
|
|
if (counter > E.numRows - 1) {
|
|
|
|
E.cy = E.numRows - 1;
|
|
|
|
} else if (counter < 0) {
|
|
|
|
E.cy = 0;
|
|
|
|
} else {
|
|
|
|
E.cy = counter;
|
|
|
|
}
|
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case 'o':
|
|
|
|
editorCommandKp('$');
|
|
|
|
editorCommandKp('i');
|
2019-12-31 23:54:43 +00:00
|
|
|
editorMoveCursor(ARROW_RIGHT);
|
|
|
|
editorInsertNewline();
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case 'O':
|
2019-12-31 23:54:43 +00:00
|
|
|
editorCommandKp('^');
|
2019-12-31 03:52:43 +00:00
|
|
|
editorInsertNewline();
|
|
|
|
editorMoveCursor(ARROW_UP);
|
|
|
|
editorCommandKp('i');
|
|
|
|
break;
|
|
|
|
case 'x':
|
2019-12-31 23:54:43 +00:00
|
|
|
while (counter > 0) {
|
|
|
|
E.mode = InputMode;
|
|
|
|
editorMoveCursor(ARROW_RIGHT);
|
|
|
|
E.mode = CommandMode;
|
|
|
|
editorDeleteChar();
|
|
|
|
if (E.cx == E.row[E.cy].size) editorMoveCursor(ARROW_LEFT);
|
2020-01-01 06:29:05 +00:00
|
|
|
counter--;
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
2019-12-29 07:05:31 +00:00
|
|
|
break;
|
2019-12-28 06:26:00 +00:00
|
|
|
case 'i':
|
2019-12-31 03:52:43 +00:00
|
|
|
case 'a':
|
2019-12-28 06:26:00 +00:00
|
|
|
E.mode = InputMode;
|
2019-12-31 23:54:43 +00:00
|
|
|
if (c == 'a') editorMoveCursor('l');
|
2019-12-29 02:21:29 +00:00
|
|
|
break;
|
|
|
|
case 'd':
|
2019-12-31 23:54:43 +00:00
|
|
|
if (!deleting) {
|
|
|
|
deleting++;
|
|
|
|
return;
|
|
|
|
} else {
|
|
|
|
while (counter > 0) {
|
|
|
|
editorDelRow(E.cy);
|
|
|
|
if (E.cy == E.numRows) E.cy--;
|
|
|
|
if (E.cy < 0) E.cy = 0;
|
|
|
|
counter--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
2019-12-29 02:21:29 +00:00
|
|
|
case '$':
|
2019-12-31 23:54:43 +00:00
|
|
|
if (deleting) {
|
|
|
|
int diff = E.row[E.cy].size - E.cx;
|
|
|
|
E.cx = E.row[E.cy].size - 1;
|
|
|
|
if (E.cx < 0) E.cx = 0;
|
|
|
|
while (diff > 0) {
|
|
|
|
E.mode = InputMode;
|
|
|
|
editorMoveCursor(ARROW_RIGHT);
|
|
|
|
E.mode = CommandMode;
|
|
|
|
editorDeleteChar();
|
|
|
|
if (E.cx == E.row[E.cy].size) editorMoveCursor(ARROW_LEFT);
|
|
|
|
diff--;
|
|
|
|
}
|
|
|
|
} else if (E.cy < E.numRows) {
|
|
|
|
E.cx = E.row[E.cy].size - 1;
|
|
|
|
if (E.cx < 0) E.cx = 0;
|
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case 'w':
|
2019-12-31 23:54:43 +00:00
|
|
|
while (counter > 0) {
|
|
|
|
if (deleting) {
|
2020-01-01 19:21:00 +00:00
|
|
|
int start_x = E.cx;
|
|
|
|
int start_y = E.cy;
|
2019-12-31 23:54:43 +00:00
|
|
|
editorNextWord();
|
2020-01-01 19:21:00 +00:00
|
|
|
while (E.cy != start_y || E.cx != start_x) {
|
2019-12-31 23:54:43 +00:00
|
|
|
editorDeleteChar();
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
editorNextWord();
|
|
|
|
}
|
2020-01-01 19:21:00 +00:00
|
|
|
counter--;
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case 'b':
|
2019-12-31 23:54:43 +00:00
|
|
|
while (counter > 0) {
|
|
|
|
if (deleting) {
|
2020-01-01 19:21:00 +00:00
|
|
|
int start_x = E.cx;
|
|
|
|
int start_y = E.cy;
|
|
|
|
editorPrevWord();
|
|
|
|
int end_x = E.cx;
|
|
|
|
int end_y = E.cy;
|
|
|
|
E.cx = start_x;
|
|
|
|
E.cy = start_y;
|
|
|
|
while (E.cy != end_y || E.cx != end_x) {
|
|
|
|
editorDeleteChar();
|
|
|
|
}
|
2019-12-31 23:54:43 +00:00
|
|
|
} else {
|
|
|
|
editorPrevWord();
|
|
|
|
}
|
|
|
|
counter--;
|
|
|
|
}
|
2019-12-31 03:52:43 +00:00
|
|
|
break;
|
|
|
|
case 'e':
|
2019-12-31 23:54:43 +00:00
|
|
|
while (counter > 0) {
|
|
|
|
if (deleting) {
|
2020-01-01 19:21:00 +00:00
|
|
|
int start_x = E.cx;
|
|
|
|
int start_y = E.cy;
|
|
|
|
editorEndOfWord();
|
|
|
|
while (E.cy != start_y || E.cx != start_x) {
|
|
|
|
editorDeleteChar();
|
|
|
|
}
|
|
|
|
E.mode = InputMode;
|
|
|
|
editorMoveCursor(ARROW_RIGHT);
|
|
|
|
E.mode = CommandMode;
|
|
|
|
editorDeleteChar();
|
|
|
|
if (E.cx == E.row[E.cy].size) editorMoveCursor(ARROW_LEFT);
|
2019-12-31 23:54:43 +00:00
|
|
|
} else {
|
|
|
|
editorEndOfWord();
|
|
|
|
}
|
|
|
|
counter--;
|
|
|
|
}
|
2019-12-29 02:21:29 +00:00
|
|
|
break;
|
|
|
|
case '^':
|
2019-12-31 23:54:43 +00:00
|
|
|
if (deleting) {
|
|
|
|
while (E.cx > 0) {
|
|
|
|
editorDeleteChar();
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
E.cx = 0;
|
|
|
|
}
|
2019-12-29 02:21:29 +00:00
|
|
|
break;
|
2019-12-31 23:54:43 +00:00
|
|
|
case '0':
|
|
|
|
case '1':
|
|
|
|
case '2':
|
|
|
|
case '3':
|
|
|
|
case '4':
|
|
|
|
case '5':
|
|
|
|
case '6':
|
|
|
|
case '7':
|
|
|
|
case '8':
|
|
|
|
case '9':
|
|
|
|
{
|
|
|
|
if (counter <= 1 && place == 1) counter--;
|
|
|
|
int num = c - 48;
|
2020-01-01 19:21:00 +00:00
|
|
|
if (counting && num == 0) {
|
|
|
|
counter *= place;
|
|
|
|
} else {
|
|
|
|
counter += num * place;
|
|
|
|
}
|
2019-12-31 23:54:43 +00:00
|
|
|
place *= 10;
|
2020-01-01 19:21:00 +00:00
|
|
|
counting++;
|
2019-12-31 23:54:43 +00:00
|
|
|
}
|
|
|
|
return;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
2019-12-31 23:54:43 +00:00
|
|
|
deleting = 0;
|
|
|
|
place = 1;
|
|
|
|
counter = 1;
|
2020-01-01 19:21:00 +00:00
|
|
|
counting = 0;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void editorProcessKeypress() {
|
2019-12-31 03:52:43 +00:00
|
|
|
static int quit_times = UNSAVED_QUIT_COUNT;
|
2019-12-28 06:26:00 +00:00
|
|
|
int c = editorReadKey();
|
|
|
|
switch (c) {
|
|
|
|
case CTRL_KEY('q'):
|
2019-12-31 03:52:43 +00:00
|
|
|
if (E.unsaved && quit_times > 0) {
|
|
|
|
editorStatusMessage("Warning: unsaved changed. Press Ctrl-q %d more times to quit anyway", quit_times);
|
|
|
|
quit_times--;
|
|
|
|
return;
|
|
|
|
}
|
2019-12-28 06:26:00 +00:00
|
|
|
quit();
|
|
|
|
break;
|
2019-12-29 02:21:29 +00:00
|
|
|
case ARROW_DOWN:
|
|
|
|
case ARROW_UP:
|
|
|
|
case ARROW_LEFT:
|
|
|
|
case ARROW_RIGHT:
|
|
|
|
editorMoveCursor(c);
|
|
|
|
return;
|
|
|
|
case PAGE_UP:
|
|
|
|
case PAGE_DOWN:
|
|
|
|
editorPageCursor(c);
|
|
|
|
return;
|
|
|
|
case CTRL_KEY('u'):
|
|
|
|
editorPageCursor(PAGE_UP);
|
|
|
|
return;
|
|
|
|
case CTRL_KEY('d'):
|
|
|
|
editorPageCursor(PAGE_DOWN);
|
|
|
|
return;
|
2019-12-31 03:52:43 +00:00
|
|
|
case CTRL_KEY('s'):
|
2019-12-31 23:54:43 +00:00
|
|
|
editorSave(0);
|
|
|
|
return;
|
|
|
|
case CTRL_KEY('a'):
|
|
|
|
editorSave(1);
|
2019-12-31 03:52:43 +00:00
|
|
|
return;
|
2019-12-29 02:21:29 +00:00
|
|
|
case HOME_KEY:
|
|
|
|
E.cx = 0;
|
|
|
|
break;
|
|
|
|
case END_KEY:
|
2019-12-31 03:52:43 +00:00
|
|
|
if (E.cy < E.numRows)
|
|
|
|
E.cx = E.row[E.cy].size;
|
|
|
|
break;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
2019-12-31 03:52:43 +00:00
|
|
|
quit_times = UNSAVED_QUIT_COUNT;
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
if (E.mode == CommandMode) {
|
|
|
|
editorCommandKp(c);
|
|
|
|
} else {
|
|
|
|
editorInputKp(c);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
|
|
// init
|
|
|
|
// ----
|
|
|
|
void initEditor() {
|
2019-12-31 23:54:43 +00:00
|
|
|
E.mode = CommandMode;
|
|
|
|
E.rowoff = 0;
|
|
|
|
E.coloff = 0;
|
|
|
|
E.numRows = 0;
|
|
|
|
E.unsaved = 0;
|
2019-12-31 03:52:43 +00:00
|
|
|
E.statusmsg_time = 0;
|
2019-12-31 23:54:43 +00:00
|
|
|
E.cx = 0;
|
|
|
|
E.cy = 0;
|
|
|
|
E.rx = 0;
|
|
|
|
E.row = NULL;
|
|
|
|
E.filename = NULL;
|
|
|
|
E.syntax = NULL;
|
|
|
|
E.statusmsg[0] = '\0';
|
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
if (getWindowSize(&E.screenRows, &E.screenCols) == -1) die("getWindowSize");
|
2019-12-31 03:52:43 +00:00
|
|
|
E.screenRows -= 2;
|
2019-12-28 06:26:00 +00:00
|
|
|
}
|
|
|
|
|
2019-12-29 07:05:31 +00:00
|
|
|
int main(int argc, char *argv[]) {
|
2019-12-28 06:26:00 +00:00
|
|
|
enableRawMode();
|
|
|
|
initEditor();
|
2019-12-29 07:05:31 +00:00
|
|
|
if (argc >= 2) {
|
|
|
|
editorOpen(argv[1]);
|
|
|
|
}
|
2019-12-28 06:26:00 +00:00
|
|
|
|
2020-01-01 06:29:05 +00:00
|
|
|
// editorStatusMessage("Ctrl-s to save - Ctrl-q to quit");
|
2019-12-31 03:52:43 +00:00
|
|
|
|
2019-12-28 06:26:00 +00:00
|
|
|
while (1) {
|
|
|
|
editorRefreshScreen();
|
|
|
|
editorProcessKeypress();
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|