3323 lines
75 KiB
C
3323 lines
75 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2012-2018 K. Lange
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*
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* Alternatively, this source file is also released under the
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* following terms:
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* bim - Text editor
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*
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* Bim is inspired by vim, and its name is short for "Bad IMitation".
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*
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* Bim supports basic syntax highlighting, has a mode-based interface
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* similar to vim's, and can be built for ToaruOS and Linux (and should
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* be easily portable to other Unix-likes).
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*
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* Future goals:
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* - History stack
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* - Selection
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*/
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#define _XOPEN_SOURCE 500
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <termios.h>
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#include <signal.h>
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#include <locale.h>
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#include <wchar.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#ifdef __toaru__
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#include <sys/fswait.h>
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#include <toaru/utf8decode.h>
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#else
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#include <poll.h>
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#include "../base/usr/include/toaru/utf8decode.h"
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#endif
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#define BLOCK_SIZE 256
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#define ENTER_KEY '\n'
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#define BACKSPACE_KEY 0x08
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#define DELETE_KEY 0x7F
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/**
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* Theming data
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*/
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const char * COLOR_FG = "5;230";
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const char * COLOR_BG = "5;235";
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const char * COLOR_ALT_FG = "5;244";
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const char * COLOR_ALT_BG = "5;236";
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const char * COLOR_NUMBER_BG = "5;232";
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const char * COLOR_NUMBER_FG = "5;101";
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const char * COLOR_STATUS_BG = "5;238";
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const char * COLOR_TABBAR_BG = "5;230";
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const char * COLOR_TAB_BG = "5;248";
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const char * COLOR_ERROR_FG = "5;015";
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const char * COLOR_ERROR_BG = "5;196";
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const char * COLOR_SEARCH_FG = "5;234";
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const char * COLOR_SEARCH_BG = "5;226";
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const char * COLOR_KEYWORD = "5;117";
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const char * COLOR_STRING = "5;113";
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const char * COLOR_COMMENT = "5;102;3";
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const char * COLOR_TYPE = "5;185";
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const char * COLOR_PRAGMA = "5;173";
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#define FLAG_NONE 0
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#define FLAG_KEYWORD 1
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#define FLAG_STRING 2
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#define FLAG_COMMENT 3
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#define FLAG_TYPE 4
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#define FLAG_PRAGMA 5
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#define FLAG_NUMERAL 6
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#define FLAG_NORM_MAX 15
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#define FLAG_COMMENT_ML 16
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#define FLAG_STRING_ML1 17
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#define FLAG_STRING_ML2 18
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/**
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* Convert syntax hilighting flag to color code
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*/
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const char * flag_to_color(int flag) {
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switch (flag) {
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case FLAG_KEYWORD:
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return COLOR_KEYWORD;
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case FLAG_STRING:
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case FLAG_STRING_ML1:
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case FLAG_STRING_ML2:
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return COLOR_STRING;
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case FLAG_COMMENT:
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case FLAG_COMMENT_ML:
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return COLOR_COMMENT;
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case FLAG_TYPE:
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return COLOR_TYPE;
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case FLAG_NUMERAL:
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case FLAG_PRAGMA:
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return COLOR_PRAGMA;
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default:
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return COLOR_FG;
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}
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}
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/**
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* Line buffer definitions
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*
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* Lines are essentially resizable vectors of char_t structs,
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* which represent single codepoints in the file.
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*/
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typedef struct {
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uint32_t display_width:5;
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uint32_t flags:6;
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uint32_t codepoint:21;
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} __attribute__((packed)) char_t;
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/**
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* Lines have available and actual lengths, describing
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* how much space was allocated vs. how much is being
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* used at the moment.
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*/
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typedef struct {
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int available;
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int actual;
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int istate;
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char_t text[0];
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} line_t;
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/**
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* Global terminal state
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*/
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int term_width, term_height;
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int csr_x_actual, csr_y_actual;
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/**
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* Command-line options
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*/
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int hilight_on_open = 1;
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void redraw_line(int j, int x);
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/**
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* Special implementation of getch with a timeout
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*/
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int _bim_unget = -1;
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void bim_unget(int c) {
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_bim_unget = c;
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}
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int bim_getch(void) {
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if (_bim_unget != -1) {
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int out = _bim_unget;
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_bim_unget = -1;
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return out;
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}
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#ifdef __linux__
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struct pollfd fds[1];
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fds[0].fd = STDIN_FILENO;
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fds[0].events = POLLIN;
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int ret = poll(fds,1,200);
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if (ret > 0 && fds[0].revents & POLLIN) {
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char buf[1];
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read(STDIN_FILENO, buf, 1);
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return buf[0];
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} else {
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return -1;
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}
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#else
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int fds[] = {STDIN_FILENO};
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int index = fswait2(1,fds,200);
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if (index == 0) {
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char buf[1];
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read(STDIN_FILENO, buf, 1);
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return buf[0];
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} else {
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return -1;
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}
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#endif
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}
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/**
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* Buffer data
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*
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* A buffer describes a file, and stores
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* its name as well as the editor state
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* (cursor offsets, etc.) and the actual
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* line buffers.
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*/
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typedef struct _env {
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int bottom_size;
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short lineno_width;
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short loading;
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char * file_name;
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int offset;
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int coffset;
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int line_no;
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int line_count;
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int line_avail;
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int col_no;
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char * search;
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struct syntax_definition * syntax;
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short modified;
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short mode;
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short tabs;
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short tabstop;
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line_t ** lines;
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} buffer_t;
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/**
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* Pointer to current active buffer
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*/
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buffer_t * env;
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/**
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* Editor modes (like in vim)
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*/
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#define MODE_NORMAL 0
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#define MODE_INSERT 1
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/**
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* Available buffers
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*/
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int buffers_len;
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int buffers_avail;
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buffer_t ** buffers;
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/**
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* Create a new buffer
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*/
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buffer_t * buffer_new(void) {
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if (buffers_len == buffers_avail) {
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/* If we are out of buffer space, expand the buffers vector */
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buffers_avail *= 2;
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buffers = realloc(buffers, sizeof(buffer_t *) * buffers_avail);
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}
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/* Allocate a new buffer */
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buffers[buffers_len] = malloc(sizeof(buffer_t));
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memset(buffers[buffers_len], 0x00, sizeof(buffer_t));
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buffers_len++;
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return buffers[buffers_len-1];
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}
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/**
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* Close a buffer
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*/
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buffer_t * buffer_close(buffer_t * buf) {
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int i;
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/* Locate the buffer in the buffer pointer vector */
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for (i = 0; i < buffers_len; i++) {
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if (buf == buffers[i])
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break;
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}
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/* Invalid buffer? */
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if (i == buffers_len) {
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return env; /* wtf */
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}
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/* Remove the buffer from the vector, moving others up */
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if (i != buffers_len - 1) {
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memmove(&buffers[i], &buffers[i+1], sizeof(*buffers) * (buffers_len - i));
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}
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/* There is one less buffer */
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buffers_len--;
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if (!buffers_len) {
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/* There are no more buffers. */
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return NULL;
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}
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/* If this was the last buffer, return the previous last buffer */
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if (i == buffers_len) {
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return buffers[buffers_len-1];
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}
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/* Otherwise return the new last buffer */
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return buffers[i];
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}
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/**
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* Syntax definition for C
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*/
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int syn_c_iskeywordchar(int c) {
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if (isalnum(c)) return 1;
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if (c == '_') return 1;
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return 0;
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}
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static char * syn_c_keywords[] = {
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"while","if","for","continue","return","break","switch","case","sizeof",
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"struct","union","typedef","do","default","else","goto",
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"alignas","alignof","offsetof",
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NULL
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};
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static char * syn_c_types[] = {
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"static","int","char","short","float","double","void","unsigned","volatile",
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"register","long","inline","restrict","enum","auto","extern","bool","complex",
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"uint8_t","uint16_t","uint32_t","uint64_t",
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"int8_t","int16_t","int32_t","int64_t",
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NULL
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};
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static int syn_c_extended(line_t * line, int i, int c, int last, int * out_left) {
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if (i == 0 && c == '#') {
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*out_left = line->actual+1;
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return FLAG_PRAGMA;
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}
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if ((!last || !syn_c_iskeywordchar(last)) && (i < line->actual - 3) &&
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line->text[i].codepoint == 'N' &&
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line->text[i+1].codepoint == 'U' &&
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line->text[i+2].codepoint == 'L' &&
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line->text[i+3].codepoint == 'L' &&
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(i == line->actual - 4 || !syn_c_iskeywordchar(line->text[i+4].codepoint))) {
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*out_left = 3;
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return FLAG_NUMERAL;
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}
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if ((!last || !syn_c_iskeywordchar(last)) && isdigit(c)) {
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if (c == '0' && i < line->actual - 1 && line->text[i+1].codepoint == 'x') {
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int j = 2;
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for (; i + j < line->actual && isxdigit(line->text[i+j].codepoint); ++j);
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if (i + j < line->actual && syn_c_iskeywordchar(line->text[i+j].codepoint)) {
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return FLAG_NONE;
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}
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*out_left = j - 1;
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return FLAG_NUMERAL;
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} else {
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int j = 1;
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while (i + j < line->actual && isdigit(line->text[i+j].codepoint)) {
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j++;
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}
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if (i + j < line->actual && syn_c_iskeywordchar(line->text[i+j].codepoint)) {
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return FLAG_NONE;
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}
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*out_left = j - 1;
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return FLAG_NUMERAL;
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}
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}
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if (c == '/') {
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if (i < line->actual - 1 && line->text[i+1].codepoint == '/') {
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*out_left = (line->actual + 1) - i;
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return FLAG_COMMENT;
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}
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if (i < line->actual - 1 && line->text[i+1].codepoint == '*') {
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int last = 0;
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for (int j = i + 2; j < line->actual; ++j) {
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int c = line->text[j].codepoint;
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if (c == '/' && last == '*') {
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*out_left = j - i;
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return FLAG_COMMENT;
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}
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last = c;
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}
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/* TODO multiline - update next */
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*out_left = (line->actual + 1) - i;
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return FLAG_COMMENT_ML;
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}
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}
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if (c == '\'') {
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if (i < line->actual - 3 && line->text[i+1].codepoint == '\\' &&
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line->text[i+3].codepoint == '\'') {
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*out_left = 3;
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return FLAG_NUMERAL;
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}
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if (i < line->actual - 2 && line->text[i+2].codepoint == '\'') {
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*out_left = 2;
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return FLAG_NUMERAL;
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}
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}
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if (c == '"') {
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int last = 0;
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for (int j = i+1; j < line->actual; ++j) {
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int c = line->text[j].codepoint;
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if (last != '\\' && c == '"') {
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*out_left = j - i;
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return FLAG_STRING;
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}
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if (last == '\\' && c == '\\') {
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last = 0;
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}
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last = c;
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}
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*out_left = (line->actual + 1) - i; /* unterminated string */
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return FLAG_STRING;
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}
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return 0;
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}
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char * syn_c_ext[] = {".c",".h",NULL};
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static int syn_c_finish(line_t * line, int * left, int state) {
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if (state == FLAG_COMMENT_ML) {
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int last = 0;
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for (int i = 0; i < line->actual; ++i) {
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if (line->text[i].codepoint == '/' && last == '*') {
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*left = i+2;
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return FLAG_COMMENT;
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}
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last = line->text[i].codepoint;
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}
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return FLAG_COMMENT_ML;
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}
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return 0;
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}
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/**
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* Syntax definition for Python
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*/
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static char * syn_py_keywords[] = {
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"class","def","return","del","if","else","elif",
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"for","while","continue","break","assert",
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"as","and","or","except","finally","from",
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"global","import","in","is","lambda","with",
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"nonlocal","not","pass","raise","try","yield",
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NULL
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};
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static char * syn_py_types[] = {
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"True","False","None",
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"object","set","dict","int","str","bytes",
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NULL
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};
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static int syn_py_extended(line_t * line, int i, int c, int last, int * out_left) {
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if (i == 0 && c == 'i') {
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/* Check for import */
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char * import = "import ";
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for (int j = 0; j < line->actual + 1; ++j) {
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if (import[j] == '\0') {
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*out_left = j - 2;
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return FLAG_PRAGMA;
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}
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if (line->text[j].codepoint != import[j]) break;
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}
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}
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if (c == '#') {
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*out_left = (line->actual + 1) - i;
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return FLAG_COMMENT;
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}
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if (c == '@') {
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for (int j = i+1; j < line->actual + 1; ++j) {
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if (!syn_c_iskeywordchar(line->text[j].codepoint)) {
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*out_left = j - i - 1;
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return FLAG_PRAGMA;
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}
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*out_left = (line->actual + 1) - i;
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return FLAG_PRAGMA;
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}
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}
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if ((!last || !syn_c_iskeywordchar(last)) && isdigit(c)) {
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if (c == '0' && i < line->actual - 1 && line->text[i+1].codepoint == 'x') {
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int j = 2;
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for (; i + j < line->actual && isxdigit(line->text[i+j].codepoint); ++j);
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if (i + j < line->actual && syn_c_iskeywordchar(line->text[i+j].codepoint)) {
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return FLAG_NONE;
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}
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*out_left = j - 1;
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return FLAG_NUMERAL;
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} else {
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int j = 1;
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while (i + j < line->actual && isdigit(line->text[i+j].codepoint)) {
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j++;
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}
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if (i + j < line->actual && syn_c_iskeywordchar(line->text[i+j].codepoint)) {
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return FLAG_NONE;
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}
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*out_left = j - 1;
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return FLAG_NUMERAL;
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}
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}
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if (line->text[i].codepoint == '\'') {
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if (i + 2 < line->actual && line->text[i+1].codepoint == '\'' && line->text[i+2].codepoint == '\'') {
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/* Begin multiline */
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for (int j = i + 3; j < line->actual - 2; ++j) {
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if (line->text[j].codepoint == '\'' &&
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line->text[j+1].codepoint == '\'' &&
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line->text[j+2].codepoint == '\'') {
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*out_left = (j+2) - i;
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return FLAG_STRING;
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}
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}
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return FLAG_STRING_ML1;
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}
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|
|
int last = 0;
|
|
for (int j = i+1; j < line->actual; ++j) {
|
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int c = line->text[j].codepoint;
|
|
if (last != '\\' && c == '\'') {
|
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*out_left = j - i;
|
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return FLAG_STRING;
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}
|
|
if (last == '\\' && c == '\\') {
|
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last = 0;
|
|
}
|
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last = c;
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}
|
|
*out_left = (line->actual + 1) - i; /* unterminated string */
|
|
return FLAG_STRING;
|
|
}
|
|
|
|
if (line->text[i].codepoint == '"') {
|
|
if (i + 2 < line->actual && line->text[i+1].codepoint == '"' && line->text[i+2].codepoint == '"') {
|
|
/* Begin multiline */
|
|
for (int j = i + 3; j < line->actual - 2; ++j) {
|
|
if (line->text[j].codepoint == '"' &&
|
|
line->text[j+1].codepoint == '"' &&
|
|
line->text[j+2].codepoint == '"') {
|
|
*out_left = (j+2) - i;
|
|
return FLAG_STRING;
|
|
}
|
|
}
|
|
return FLAG_STRING_ML2;
|
|
}
|
|
|
|
int last = 0;
|
|
for (int j = i+1; j < line->actual; ++j) {
|
|
int c = line->text[j].codepoint;
|
|
if (last != '\\' && c == '"') {
|
|
*out_left = j - i;
|
|
return FLAG_STRING;
|
|
}
|
|
if (last == '\\' && c == '\\') {
|
|
last = 0;
|
|
}
|
|
last = c;
|
|
}
|
|
*out_left = (line->actual + 1) - i; /* unterminated string */
|
|
return FLAG_STRING;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int syn_py_finish(line_t * line, int * left, int state) {
|
|
/* TODO support multiline quotes */
|
|
if (state == FLAG_STRING_ML1) {
|
|
for (int j = 0; j < line->actual - 2; ++j) {
|
|
if (line->text[j].codepoint == '\'' &&
|
|
line->text[j+1].codepoint == '\'' &&
|
|
line->text[j+2].codepoint == '\'') {
|
|
*left = (j+3);
|
|
return FLAG_STRING;
|
|
}
|
|
}
|
|
return FLAG_STRING_ML1;
|
|
}
|
|
if (state == FLAG_STRING_ML2) {
|
|
for (int j = 0; j < line->actual - 2; ++j) {
|
|
if (line->text[j].codepoint == '"' &&
|
|
line->text[j+1].codepoint == '"' &&
|
|
line->text[j+2].codepoint == '"') {
|
|
*left = (j+3);
|
|
return FLAG_STRING;
|
|
}
|
|
}
|
|
return FLAG_STRING_ML2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
char * syn_py_ext[] = {".py",NULL};
|
|
|
|
/**
|
|
* Syntax definition for ToaruOS shell
|
|
*/
|
|
static char * syn_sh_keywords[] = {
|
|
"cd","exit","export","help","history","if",
|
|
"empty?","equals?","return","export-cmd",
|
|
"source","exec","not","while","then","else",
|
|
NULL,
|
|
};
|
|
|
|
static char * syn_sh_types[] = {NULL};
|
|
|
|
static int syn_sh_extended(line_t * line, int i, int c, int last, int * out_left) {
|
|
(void)last;
|
|
|
|
if (c == '#') {
|
|
*out_left = (line->actual + 1) - i;
|
|
return FLAG_COMMENT;
|
|
}
|
|
|
|
if (line->text[i].codepoint == '\'') {
|
|
int last = 0;
|
|
for (int j = i+1; j < line->actual + 1; ++j) {
|
|
int c = line->text[j].codepoint;
|
|
if (last != '\\' && c == '\'') {
|
|
*out_left = j - i;
|
|
return FLAG_STRING;
|
|
}
|
|
if (last == '\\' && c == '\\') {
|
|
last = 0;
|
|
}
|
|
last = c;
|
|
}
|
|
*out_left = (line->actual + 1) - i; /* unterminated string */
|
|
return FLAG_STRING;
|
|
}
|
|
|
|
if (line->text[i].codepoint == '"') {
|
|
int last = 0;
|
|
for (int j = i+1; j < line->actual + 1; ++j) {
|
|
int c = line->text[j].codepoint;
|
|
if (last != '\\' && c == '"') {
|
|
*out_left = j - i;
|
|
return FLAG_STRING;
|
|
}
|
|
if (last == '\\' && c == '\\') {
|
|
last = 0;
|
|
}
|
|
last = c;
|
|
}
|
|
*out_left = (line->actual + 1) - i; /* unterminated string */
|
|
return FLAG_STRING;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int syn_sh_iskeywordchar(int c) {
|
|
if (isalnum(c)) return 1;
|
|
if (c == '-') return 1;
|
|
if (c == '_') return 1;
|
|
if (c == '?') return 1;
|
|
return 0;
|
|
}
|
|
|
|
static char * syn_sh_ext[] = {".sh",".eshrc",".esh",NULL};
|
|
|
|
static int syn_sh_finish(line_t * line, int * left, int state) {
|
|
/* No multilines supported */
|
|
(void)line;
|
|
(void)left;
|
|
(void)state;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Syntax hilighting definition database
|
|
*/
|
|
struct syntax_definition {
|
|
char * name;
|
|
char ** ext;
|
|
char ** keywords;
|
|
char ** types;
|
|
int (*extended)(line_t *, int, int, int, int *);
|
|
int (*iskwchar)(int);
|
|
int (*finishml)(line_t *, int *, int);
|
|
} syntaxes[] = {
|
|
{"c",syn_c_ext,syn_c_keywords,syn_c_types,syn_c_extended,syn_c_iskeywordchar,syn_c_finish},
|
|
{"python",syn_py_ext,syn_py_keywords,syn_py_types,syn_py_extended,syn_c_iskeywordchar,syn_py_finish},
|
|
{"esh",syn_sh_ext,syn_sh_keywords,syn_sh_types,syn_sh_extended,syn_sh_iskeywordchar,syn_sh_finish},
|
|
{NULL}
|
|
};
|
|
|
|
/**
|
|
* Checks whether the character pointed to by `c` is the start of a match for
|
|
* keyword or type name `str`.
|
|
*/
|
|
int check_line(line_t * line, int c, char * str, int last) {
|
|
if (env->syntax->iskwchar(last)) return 0;
|
|
for (int i = c; i < line->actual; ++i, ++str) {
|
|
if (*str == '\0' && !env->syntax->iskwchar(line->text[i].codepoint)) return 1;
|
|
if (line->text[i].codepoint == *str) continue;
|
|
return 0;
|
|
}
|
|
if (*str == '\0') return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Calculate syntax hilighting for the given line.
|
|
*/
|
|
void recalculate_syntax(line_t * line, int offset) {
|
|
if (!env->syntax) return;
|
|
|
|
/* Start from the line's stored in initial state */
|
|
int state = line->istate;
|
|
int left = 0;
|
|
int last = 0;
|
|
|
|
if (state) {
|
|
/*
|
|
* If we are already highlighting coming in, then we need to check
|
|
* for a finishing sequence for the curent state.
|
|
*/
|
|
state = env->syntax->finishml(line,&left,state);
|
|
|
|
if (state > FLAG_NORM_MAX) {
|
|
/* The finish check said that this multiline state continues. */
|
|
for (int i = 0; i < line->actual; i++) {
|
|
/* Set the entire line to draw with this state */
|
|
line->text[i].flags = state;
|
|
}
|
|
|
|
/* Recalculate later lines if needed */
|
|
goto _multiline;
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < line->actual; last = line->text[i++].codepoint) {
|
|
if (!left) state = 0;
|
|
|
|
if (state) {
|
|
/* Currently hilighting, have `left` characters remaining with this state */
|
|
left--;
|
|
line->text[i].flags = state;
|
|
|
|
if (!left) {
|
|
/* Done hilighting this state, go back to parsing on next character */
|
|
state = 0;
|
|
}
|
|
|
|
/* If we are hilighting something, don't parse */
|
|
continue;
|
|
}
|
|
|
|
int c = line->text[i].codepoint;
|
|
line->text[i].flags = FLAG_NONE;
|
|
|
|
/* Language-specific syntax hilighting */
|
|
if (env->syntax->extended) {
|
|
int s = env->syntax->extended(line,i,c,last,&left);
|
|
if (s) {
|
|
state = s;
|
|
if (state > FLAG_NORM_MAX) {
|
|
/* A multiline state was returned. Fill the rest of the line */
|
|
for (; i < line->actual; i++) {
|
|
line->text[i].flags = state;
|
|
}
|
|
/* And recalculate later lines if needed */
|
|
goto _multiline;
|
|
}
|
|
goto _continue;
|
|
}
|
|
}
|
|
|
|
/* Keywords */
|
|
for (char ** kw = env->syntax->keywords; *kw; kw++) {
|
|
int c = check_line(line, i, *kw, last);
|
|
if (c == 1) {
|
|
left = strlen(*kw)-1;
|
|
state = FLAG_KEYWORD;
|
|
goto _continue;
|
|
}
|
|
}
|
|
|
|
/* Type names */
|
|
for (char ** kw = env->syntax->types; *kw; kw++) {
|
|
int c = check_line(line, i, *kw, last);
|
|
if (c == 1) {
|
|
left = strlen(*kw)-1;
|
|
state = FLAG_TYPE;
|
|
goto _continue;
|
|
}
|
|
}
|
|
|
|
_continue:
|
|
line->text[i].flags = state;
|
|
}
|
|
|
|
state = 0;
|
|
|
|
_multiline:
|
|
/*
|
|
* If the next line's initial state does not match the state we ended on,
|
|
* then it needs to be recalculated (and redraw). This may lead to multiple
|
|
* recursive calls until a match is found.
|
|
*/
|
|
if (offset + 1 < env->line_count && env->lines[offset+1]->istate != state) {
|
|
/* Set the next line's initial state to our ending state */
|
|
env->lines[offset+1]->istate = state;
|
|
|
|
/* Recursively recalculate */
|
|
recalculate_syntax(env->lines[offset+1],offset+1);
|
|
|
|
/*
|
|
* Determine if this is an on-screen line so we can redraw it;
|
|
* this ends up drawing from bottom to top when multiple lines
|
|
* need to be redrawn by a recursive call.
|
|
*/
|
|
if (offset+1 >= env->offset && offset+1 < env->offset + term_height - env->bottom_size - 1) {
|
|
redraw_line(offset + 1 - env->offset,offset+1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Recalculate tab widths.
|
|
*/
|
|
void recalculate_tabs(line_t * line) {
|
|
int j = 0;
|
|
for (int i = 0; i < line->actual; ++i) {
|
|
if (line->text[i].codepoint == '\t') {
|
|
line->text[i].display_width = env->tabstop - (j % env->tabstop);
|
|
}
|
|
j += line->text[i].display_width;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* TODO:
|
|
*
|
|
* The line editing functions should probably take a buffer_t *
|
|
* so that they can act on buffers other than the active one.
|
|
*/
|
|
|
|
/**
|
|
* Insert a character into an existing line.
|
|
*/
|
|
line_t * line_insert(line_t * line, char_t c, int offset, int lineno) {
|
|
|
|
/* If there is not enough space... */
|
|
if (line->actual == line->available) {
|
|
/* Expand the line buffer */
|
|
line->available *= 2;
|
|
line = realloc(line, sizeof(line_t) + sizeof(char_t) * line->available);
|
|
}
|
|
|
|
/* If this was not the last character, then shift remaining characters forward. */
|
|
if (offset < line->actual) {
|
|
memmove(&line->text[offset+1], &line->text[offset], sizeof(char_t) * (line->actual - offset));
|
|
}
|
|
|
|
/* Insert the new character */
|
|
line->text[offset] = c;
|
|
|
|
/* There is one new character in the line */
|
|
line->actual += 1;
|
|
|
|
recalculate_tabs(line);
|
|
recalculate_syntax(line, lineno);
|
|
|
|
return line;
|
|
}
|
|
|
|
/**
|
|
* Delete a character from a line
|
|
*/
|
|
void line_delete(line_t * line, int offset, int lineno) {
|
|
/* Can't delete character before start of line. */
|
|
if (offset == 0) return;
|
|
|
|
/* If this isn't the last character, we need to move all subsequent characters backwards */
|
|
if (offset < line->actual) {
|
|
memmove(&line->text[offset-1], &line->text[offset], sizeof(char_t) * (line->actual - offset));
|
|
}
|
|
|
|
/* The line is one character shorter */
|
|
line->actual -= 1;
|
|
|
|
recalculate_tabs(line);
|
|
recalculate_syntax(line, lineno);
|
|
}
|
|
|
|
/**
|
|
* Remove a line from the active buffer
|
|
*/
|
|
line_t ** remove_line(line_t ** lines, int offset) {
|
|
|
|
/* If there is only one line, clear it instead of removing it. */
|
|
if (env->line_count == 1) {
|
|
lines[offset]->actual = 0;
|
|
return lines;
|
|
}
|
|
|
|
/* Otherwise, free the data used by the line */
|
|
free(lines[offset]);
|
|
|
|
/* Move other lines up */
|
|
if (offset < env->line_count) {
|
|
memmove(&lines[offset], &lines[offset+1], sizeof(line_t *) * (env->line_count - (offset - 1)));
|
|
lines[env->line_count-1] = NULL;
|
|
}
|
|
|
|
/* There is one less line */
|
|
env->line_count -= 1;
|
|
return lines;
|
|
}
|
|
|
|
/**
|
|
* Add a new line to the active buffer.
|
|
*/
|
|
line_t ** add_line(line_t ** lines, int offset) {
|
|
|
|
/* Invalid offset? */
|
|
if (offset > env->line_count) return lines;
|
|
|
|
/* Not enough space */
|
|
if (env->line_count == env->line_avail) {
|
|
/* Allocate more space */
|
|
env->line_avail *= 2;
|
|
lines = realloc(lines, sizeof(line_t *) * env->line_avail);
|
|
}
|
|
|
|
/* If this isn't the last line, move other lines down */
|
|
if (offset < env->line_count) {
|
|
memmove(&lines[offset+1], &lines[offset], sizeof(line_t *) * (env->line_count - offset));
|
|
}
|
|
|
|
/* Allocate the new line */
|
|
lines[offset] = malloc(sizeof(line_t) + sizeof(char_t) * 32);
|
|
lines[offset]->available = 32;
|
|
lines[offset]->actual = 0;
|
|
lines[offset]->istate = 0;
|
|
|
|
/* There is one new line */
|
|
env->line_count += 1;
|
|
env->lines = lines;
|
|
|
|
if (offset > 0) {
|
|
recalculate_syntax(lines[offset-1],offset-1);
|
|
}
|
|
return lines;
|
|
}
|
|
|
|
/**
|
|
* Merge two consecutive lines.
|
|
* lineb is the offset of the second line.
|
|
*/
|
|
line_t ** merge_lines(line_t ** lines, int lineb) {
|
|
|
|
/* linea is the line immediately before lineb */
|
|
int linea = lineb - 1;
|
|
|
|
/* If there isn't enough space in linea hold both... */
|
|
while (lines[linea]->available < lines[linea]->actual + lines[lineb]->actual) {
|
|
/* ... allocate more space until it fits */
|
|
lines[linea]->available *= 2;
|
|
/* XXX why not just do this once after calculating appropriate size */
|
|
lines[linea] = realloc(lines[linea], sizeof(line_t) + sizeof(char_t) * lines[linea]->available);
|
|
}
|
|
|
|
/* Copy the second line into the first line */
|
|
memcpy(&lines[linea]->text[lines[linea]->actual], &lines[lineb]->text, sizeof(char_t) * lines[lineb]->actual);
|
|
|
|
/* The first line is now longer */
|
|
lines[linea]->actual = lines[linea]->actual + lines[lineb]->actual;
|
|
|
|
recalculate_tabs(lines[linea]);
|
|
recalculate_syntax(lines[linea], linea);
|
|
|
|
/* Remove the second line */
|
|
return remove_line(lines, lineb);
|
|
}
|
|
|
|
/**
|
|
* Split a line into two lines at the given column
|
|
*/
|
|
line_t ** split_line(line_t ** lines, int line, int split) {
|
|
|
|
/* If we're trying to split from the start, just add a new blank line before */
|
|
if (split == 0) {
|
|
return add_line(lines, line - 1);
|
|
}
|
|
|
|
/* Allocate more space as needed */
|
|
if (env->line_count == env->line_avail) {
|
|
env->line_avail *= 2;
|
|
lines = realloc(lines, sizeof(line_t *) * env->line_avail);
|
|
}
|
|
|
|
/* Shift later lines down */
|
|
if (line < env->line_count) {
|
|
memmove(&lines[line+1], &lines[line], sizeof(line_t *) * (env->line_count - line));
|
|
}
|
|
|
|
/* I have no idea what this is doing */
|
|
int remaining = lines[line-1]->actual - split;
|
|
|
|
int v = remaining;
|
|
v--;
|
|
v |= v >> 1;
|
|
v |= v >> 2;
|
|
v |= v >> 4;
|
|
v |= v >> 8;
|
|
v |= v >> 16;
|
|
v++;
|
|
|
|
/* Allocate space for the new line */
|
|
lines[line] = malloc(sizeof(line_t) + sizeof(char_t) * v);
|
|
lines[line]->available = v;
|
|
lines[line]->actual = remaining;
|
|
lines[line]->istate = 0;
|
|
|
|
/* Move the data from the old line into the new line */
|
|
memmove(lines[line]->text, &lines[line-1]->text[split], sizeof(char_t) * remaining);
|
|
lines[line-1]->actual = split;
|
|
|
|
recalculate_tabs(lines[line-1]);
|
|
recalculate_tabs(lines[line]);
|
|
recalculate_syntax(lines[line-1], line-1);
|
|
recalculate_syntax(lines[line], line);
|
|
|
|
/* There is one new line */
|
|
env->line_count += 1;
|
|
|
|
/* We may have reallocated lines */
|
|
return lines;
|
|
}
|
|
|
|
/**
|
|
* Initialize a buffer with default values
|
|
*/
|
|
void setup_buffer(buffer_t * env) {
|
|
/* If this buffer was already initialized, clear out its line data */
|
|
if (env->lines) {
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
free(env->lines[i]);
|
|
}
|
|
free(env->lines);
|
|
}
|
|
|
|
/* Default state parameters */
|
|
env->line_no = 1; /* Default cursor position */
|
|
env->col_no = 1;
|
|
env->line_count = 1; /* Buffers always have at least one line */
|
|
env->modified = 0;
|
|
env->bottom_size = 2;
|
|
env->offset = 0;
|
|
env->line_avail = 8; /* Default line buffer capacity */
|
|
env->tabs = 1; /* Tabs by default */
|
|
env->tabstop = 4; /* Tab stop width */
|
|
|
|
/* Allocate line buffer */
|
|
env->lines = malloc(sizeof(line_t *) * env->line_avail);
|
|
|
|
/* Initialize the first line */
|
|
env->lines[0] = malloc(sizeof(line_t) + sizeof(char_t) * 32);
|
|
env->lines[0]->available = 32;
|
|
env->lines[0]->actual = 0;
|
|
env->lines[0]->istate = 0;
|
|
}
|
|
|
|
/**
|
|
* Toggle buffered / unbuffered modes
|
|
*/
|
|
struct termios old;
|
|
void set_unbuffered(void) {
|
|
tcgetattr(fileno(stdin), &old);
|
|
struct termios new = old;
|
|
new.c_lflag &= (~ICANON & ~ECHO);
|
|
tcsetattr(fileno(stdin), TCSAFLUSH, &new);
|
|
}
|
|
|
|
void set_buffered(void) {
|
|
tcsetattr(fileno(stdin), TCSAFLUSH, &old);
|
|
}
|
|
|
|
/**
|
|
* Convert codepoint to utf-8 string
|
|
*/
|
|
int to_eight(uint32_t codepoint, char * out) {
|
|
memset(out, 0x00, 7);
|
|
|
|
if (codepoint < 0x0080) {
|
|
out[0] = (char)codepoint;
|
|
} else if (codepoint < 0x0800) {
|
|
out[0] = 0xC0 | (codepoint >> 6);
|
|
out[1] = 0x80 | (codepoint & 0x3F);
|
|
} else if (codepoint < 0x10000) {
|
|
out[0] = 0xE0 | (codepoint >> 12);
|
|
out[1] = 0x80 | ((codepoint >> 6) & 0x3F);
|
|
out[2] = 0x80 | (codepoint & 0x3F);
|
|
} else if (codepoint < 0x200000) {
|
|
out[0] = 0xF0 | (codepoint >> 18);
|
|
out[1] = 0x80 | ((codepoint >> 12) & 0x3F);
|
|
out[2] = 0x80 | ((codepoint >> 6) & 0x3F);
|
|
out[3] = 0x80 | ((codepoint) & 0x3F);
|
|
} else if (codepoint < 0x4000000) {
|
|
out[0] = 0xF8 | (codepoint >> 24);
|
|
out[1] = 0x80 | (codepoint >> 18);
|
|
out[2] = 0x80 | ((codepoint >> 12) & 0x3F);
|
|
out[3] = 0x80 | ((codepoint >> 6) & 0x3F);
|
|
out[4] = 0x80 | ((codepoint) & 0x3F);
|
|
} else {
|
|
out[0] = 0xF8 | (codepoint >> 30);
|
|
out[1] = 0x80 | ((codepoint >> 24) & 0x3F);
|
|
out[2] = 0x80 | ((codepoint >> 18) & 0x3F);
|
|
out[3] = 0x80 | ((codepoint >> 12) & 0x3F);
|
|
out[4] = 0x80 | ((codepoint >> 6) & 0x3F);
|
|
out[5] = 0x80 | ((codepoint) & 0x3F);
|
|
}
|
|
|
|
return strlen(out);
|
|
}
|
|
|
|
/**
|
|
* Get the presentation width of a codepoint
|
|
*/
|
|
int codepoint_width(wchar_t codepoint) {
|
|
if (codepoint == '\t') {
|
|
return 1; /* Recalculate later */
|
|
}
|
|
if (codepoint < 32) {
|
|
/* We render these as ^@ */
|
|
return 2;
|
|
}
|
|
/* Skip wcwidth for anything under 256 */
|
|
if (codepoint > 256) {
|
|
/* Higher codepoints may be wider (eg. Japanese) */
|
|
return wcwidth(codepoint);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Move the terminal cursor
|
|
*/
|
|
void place_cursor(int x, int y) {
|
|
printf("\033[%d;%dH", y, x);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Move the terminal cursor, but only horizontally
|
|
*/
|
|
void place_cursor_h(int h) {
|
|
printf("\033[%dG", h);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Set text colors
|
|
*/
|
|
void set_colors(const char * fg, const char * bg) {
|
|
printf("\033[22;23;48;%s;38;%sm", bg, fg);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Set just the foreground color
|
|
*/
|
|
void set_fg_color(const char * fg) {
|
|
printf("\033[22;23;38;%sm", fg);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Clear the rest of this line
|
|
*/
|
|
void clear_to_end(void) {
|
|
printf("\033[K");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Enable bold text display
|
|
*/
|
|
void set_bold(void) {
|
|
printf("\033[1m");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Enable underlined text display
|
|
*/
|
|
void set_underline(void) {
|
|
printf("\033[4m");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Reset text display attributes
|
|
*/
|
|
void reset(void) {
|
|
printf("\033[0m");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Clear the entire screen
|
|
*/
|
|
void clear_screen(void) {
|
|
printf("\033[H\033[2J");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Hide the cursor
|
|
*/
|
|
void hide_cursor(void) {
|
|
printf("\033[?25l");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/*
|
|
* Show the cursor
|
|
*/
|
|
void show_cursor(void) {
|
|
printf("\033[?25h");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Request mouse events
|
|
*/
|
|
void mouse_enable(void) {
|
|
printf("\033[?1000h");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Stop mouse events
|
|
*/
|
|
void mouse_disable(void) {
|
|
printf("\033[?1000l");
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Shift the screen up one line
|
|
*/
|
|
void shift_up(void) {
|
|
printf("\033[1S");
|
|
}
|
|
|
|
/**
|
|
* Shift the screen down one line.
|
|
*/
|
|
void shift_down(void) {
|
|
printf("\033[1T");
|
|
}
|
|
|
|
/**
|
|
* Redaw the tabbar, with a tab for each buffer.
|
|
*
|
|
* The active buffer is highlighted.
|
|
*/
|
|
void redraw_tabbar(void) {
|
|
/* Hide cursor while rendering UI */
|
|
hide_cursor();
|
|
|
|
/* Move to upper left */
|
|
place_cursor(1,1);
|
|
|
|
/* For each buffer... */
|
|
for (int i = 0; i < buffers_len; i++) {
|
|
buffer_t * _env = buffers[i];
|
|
|
|
if (_env == env) {
|
|
/* If this is the active buffer, hilight it */
|
|
reset();
|
|
set_colors(COLOR_FG, COLOR_BG);
|
|
set_bold();
|
|
} else {
|
|
/* Otherwise use default tab color */
|
|
reset();
|
|
set_colors(COLOR_FG, COLOR_TAB_BG);
|
|
set_underline();
|
|
}
|
|
|
|
/* If this buffer is modified, indicate that with a prepended + */
|
|
if (_env->modified) {
|
|
printf(" +");
|
|
}
|
|
|
|
/* Print the filename */
|
|
if (_env->file_name) {
|
|
printf(" %s ", _env->file_name);
|
|
} else {
|
|
printf(" [No Name] ");
|
|
}
|
|
}
|
|
|
|
/* Reset bold/underline */
|
|
reset();
|
|
/* Fill the rest of the tab bar */
|
|
set_colors(COLOR_FG, COLOR_TABBAR_BG);
|
|
clear_to_end();
|
|
}
|
|
|
|
/**
|
|
* Braindead log10 implementation for the line numbers
|
|
*/
|
|
int log_base_10(unsigned int v) {
|
|
int r = (v >= 1000000000) ? 9 : (v >= 100000000) ? 8 : (v >= 10000000) ? 7 :
|
|
(v >= 1000000) ? 6 : (v >= 100000) ? 5 : (v >= 10000) ? 4 :
|
|
(v >= 1000) ? 3 : (v >= 100) ? 2 : (v >= 10) ? 1 : 0;
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* Render a line of text
|
|
*
|
|
* This handles rendering the actual text content. A full line of text
|
|
* also includes a line number and some padding.
|
|
*
|
|
* width: width of the text display region (term width - line number width)
|
|
* offset: how many cells into the line to start rendering at
|
|
*/
|
|
void render_line(line_t * line, int width, int offset) {
|
|
int i = 0; /* Offset in char_t line data entries */
|
|
int j = 0; /* Offset in terminal cells */
|
|
|
|
const char * last_color = NULL;
|
|
|
|
/* Set default text colors */
|
|
set_colors(COLOR_FG, COLOR_BG);
|
|
|
|
/*
|
|
* When we are rendering in the middle of a wide character,
|
|
* we render -'s to fill the remaining amount of the
|
|
* charater's width
|
|
*/
|
|
int remainder = 0;
|
|
|
|
/* For each character in the line ... */
|
|
while (i < line->actual) {
|
|
|
|
/* If there is remaining text... */
|
|
if (remainder) {
|
|
|
|
/* If we should be drawing by now... */
|
|
if (j >= offset) {
|
|
/* Fill remainder with -'s */
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
printf("-");
|
|
set_colors(COLOR_FG, COLOR_BG);
|
|
}
|
|
|
|
/* One less remaining width cell to fill */
|
|
remainder--;
|
|
|
|
/* Terminal offset moves forward */
|
|
j++;
|
|
|
|
/*
|
|
* If this was the last remaining character, move to
|
|
* the next codepoint in the line
|
|
*/
|
|
if (remainder == 0) {
|
|
i++;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
/* Get the next character to draw */
|
|
char_t c = line->text[i];
|
|
|
|
/* If we should be drawing by now... */
|
|
if (j >= offset) {
|
|
|
|
/* If this character is going to fall off the edge of the screen... */
|
|
if (j - offset + c.display_width >= width) {
|
|
/* We draw this with special colors so it isn't ambiguous */
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
|
|
/* If it's wide, draw ---> as needed */
|
|
while (j - offset < width - 1) {
|
|
printf("-");
|
|
j++;
|
|
}
|
|
|
|
/* End the line with a > to show it overflows */
|
|
printf(">");
|
|
break;
|
|
}
|
|
|
|
/* Syntax hilighting */
|
|
const char * color = flag_to_color(c.flags);
|
|
if (!last_color || strcmp(color, last_color)) {
|
|
set_fg_color(color);
|
|
last_color = color;
|
|
}
|
|
|
|
/* Render special characters */
|
|
if (c.codepoint == '\t') {
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
printf("»");
|
|
for (int i = 1; i < c.display_width; ++i) {
|
|
printf("·");
|
|
}
|
|
set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
|
|
} else if (c.codepoint < 32) {
|
|
/* Codepoints under 32 to get converted to ^@ escapes */
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
printf("^%c", '@' + c.codepoint);
|
|
set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
|
|
} else {
|
|
/* Normal characters get output */
|
|
char tmp[7]; /* Max six bytes, use 7 to ensure last is always nil */
|
|
to_eight(c.codepoint, tmp);
|
|
printf("%s", tmp);
|
|
}
|
|
|
|
/* Advance the terminal cell offset by the render width of this character */
|
|
j += c.display_width;
|
|
|
|
/* Advance to the next character */
|
|
i++;
|
|
} else if (c.display_width > 1) {
|
|
/*
|
|
* If this is a wide character but we aren't ready to render yet,
|
|
* we may need to draw some filler text for the remainder of its
|
|
* width to ensure we don't jump around when horizontally scrolling
|
|
* past wide characters.
|
|
*/
|
|
remainder = c.display_width - 1;
|
|
j++;
|
|
} else {
|
|
/* Regular character, not ready to draw, advance without doing anything */
|
|
j++;
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the width of the line number region
|
|
*/
|
|
int num_width(void) {
|
|
int w = log_base_10(env->line_count) + 1;
|
|
if (w < 2) return 2;
|
|
return w;
|
|
}
|
|
|
|
/**
|
|
* Redraw line.
|
|
*
|
|
* This draws the line number as well as the actual text.
|
|
* j = screen-relative line offset.
|
|
*/
|
|
void redraw_line(int j, int x) {
|
|
if (env->loading) return;
|
|
/* Hide cursor when drawing */
|
|
hide_cursor();
|
|
|
|
/* Move cursor to upper left most cell of this line */
|
|
place_cursor(1,2 + j);
|
|
|
|
/* Draw a gutter on the left.
|
|
* TODO: The gutter can be used to show single-character
|
|
* line annotations, such as collapse state, or
|
|
* whether a search result was found on this line.
|
|
*/
|
|
set_colors(COLOR_NUMBER_FG, COLOR_ALT_FG);
|
|
printf(" ");
|
|
|
|
/* Draw the line number */
|
|
set_colors(COLOR_NUMBER_FG, COLOR_NUMBER_BG);
|
|
int num_size = num_width();
|
|
for (int y = 0; y < num_size - log_base_10(x + 1); ++y) {
|
|
printf(" ");
|
|
}
|
|
printf("%d%c", x + 1, (x+1 == env->line_no && env->coffset > 0) ? '<' : ' ');
|
|
|
|
/*
|
|
* Draw the line text
|
|
* If this is the active line, the current character cell offset should be used.
|
|
* (Non-active lines are not shifted and always render from the start of the line)
|
|
*/
|
|
render_line(env->lines[x], term_width - 3 - num_size, (x + 1 == env->line_no) ? env->coffset : 0);
|
|
|
|
/* Clear the rest of the line */
|
|
clear_to_end();
|
|
}
|
|
|
|
/**
|
|
* Redraw the entire text area
|
|
*/
|
|
void redraw_text(void) {
|
|
/* Hide cursor while rendering */
|
|
hide_cursor();
|
|
|
|
/* Figure out the available size of the text region */
|
|
int l = term_height - env->bottom_size - 1;
|
|
int j = 0;
|
|
|
|
/* Draw each line */
|
|
for (int x = env->offset; j < l && x < env->line_count; x++) {
|
|
redraw_line(j,x);
|
|
j++;
|
|
}
|
|
|
|
/* Draw the rest of the text region as ~ lines */
|
|
for (; j < l; ++j) {
|
|
place_cursor(1,2 + j);
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
printf("~");
|
|
clear_to_end();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Draw the status bar
|
|
*
|
|
* The status bar shows the name of the file, whether it has modifications,
|
|
* and (in the future) what syntax highlighting mode is enabled.
|
|
*
|
|
* The right side of the tatus bar shows the line number and column.
|
|
*/
|
|
void redraw_statusbar(void) {
|
|
/* Hide cursor while rendering */
|
|
hide_cursor();
|
|
|
|
/* Move cursor to the status bar line (second from bottom */
|
|
place_cursor(1, term_height - 1);
|
|
|
|
/* Set background colors for status line */
|
|
set_colors(COLOR_FG, COLOR_STATUS_BG);
|
|
|
|
/* Print the file name */
|
|
if (env->file_name) {
|
|
printf("%s", env->file_name);
|
|
} else {
|
|
printf("[No Name]");
|
|
}
|
|
|
|
printf(" ");
|
|
|
|
if (env->syntax) {
|
|
printf("[%s]", env->syntax->name);
|
|
}
|
|
|
|
/* Print file status indicators */
|
|
if (env->modified) {
|
|
printf("[+]");
|
|
}
|
|
|
|
/* Clear the rest of the status bar */
|
|
clear_to_end();
|
|
|
|
/* Pre-render the right hand side of the status bar */
|
|
char right_hand[1024];
|
|
sprintf(right_hand, "Line %d/%d Col: %d ", env->line_no, env->line_count, env->col_no);
|
|
|
|
/* Move the cursor appropriately to draw it */
|
|
place_cursor_h(term_width - strlen(right_hand)); /* TODO: What if we're localized and this has wide chars? */
|
|
printf("%s",right_hand);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Draw the command line
|
|
*
|
|
* The command line either has input from the user (:quit, :!make, etc.)
|
|
* or shows the INSERT (or VISUAL in the future) mode name.
|
|
*/
|
|
void redraw_commandline(void) {
|
|
/* Hide cursor while rendering */
|
|
hide_cursor();
|
|
|
|
/* Move cursor to the last line */
|
|
place_cursor(1, term_height);
|
|
|
|
/* Set background color */
|
|
set_colors(COLOR_FG, COLOR_BG);
|
|
|
|
/* If we are in an edit mode, note that. */
|
|
if (env->mode == MODE_INSERT) {
|
|
set_bold();
|
|
printf("-- INSERT --");
|
|
clear_to_end();
|
|
reset();
|
|
} else {
|
|
clear_to_end();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Draw all screen elements
|
|
*/
|
|
void redraw_all(void) {
|
|
redraw_tabbar();
|
|
redraw_text();
|
|
redraw_statusbar();
|
|
redraw_commandline();
|
|
}
|
|
|
|
/**
|
|
* Update the terminal title bar
|
|
*/
|
|
void update_title(void) {
|
|
char cwd[1024] = {'/',0};
|
|
getcwd(cwd, 1024);
|
|
|
|
/*
|
|
* XXX: I think this only works in a few terminals.
|
|
* VTE seems to have a different escape sequence for tab names.
|
|
*/
|
|
printf("\033]1;%s%s (%s) - BIM\007", env->file_name, env->modified ? " +" : "", cwd);
|
|
}
|
|
|
|
/**
|
|
* Mark this buffer as modified and
|
|
* redraw the status and tabbar if needed.
|
|
*/
|
|
void set_modified(void) {
|
|
/* If it was already marked modified, no need to do anything */
|
|
if (env->modified) return;
|
|
|
|
/* Mark as modified */
|
|
env->modified = 1;
|
|
|
|
/* Redraw some things */
|
|
update_title();
|
|
redraw_tabbar();
|
|
redraw_statusbar();
|
|
}
|
|
|
|
/**
|
|
* Draw a message on the status line
|
|
*/
|
|
void render_status_message(char * message, ...) {
|
|
/* varargs setup */
|
|
va_list args;
|
|
va_start(args, message);
|
|
char buf[1024];
|
|
|
|
/* Process format string */
|
|
vsprintf(buf, message, args);
|
|
va_end(args);
|
|
|
|
/* Hide cursor while rendering */
|
|
hide_cursor();
|
|
|
|
/* Move cursor to the status bar line (second from bottom */
|
|
place_cursor(1, term_height - 1);
|
|
|
|
/* Set background colors for status line */
|
|
set_colors(COLOR_FG, COLOR_STATUS_BG);
|
|
|
|
printf("%s", buf);
|
|
|
|
/* Clear the rest of the status bar */
|
|
clear_to_end();
|
|
}
|
|
|
|
/**
|
|
* Draw an errormessage to the command line.
|
|
*/
|
|
void render_error(char * message, ...) {
|
|
/* varargs setup */
|
|
va_list args;
|
|
va_start(args, message);
|
|
char buf[1024];
|
|
|
|
/* Process format string */
|
|
vsprintf(buf, message, args);
|
|
va_end(args);
|
|
|
|
/* Hide cursor and redraw command line */
|
|
redraw_commandline();
|
|
|
|
/* Set appropriate error message colors */
|
|
set_colors(COLOR_ERROR_FG, COLOR_ERROR_BG);
|
|
|
|
/* Draw the message */
|
|
printf("%s", buf);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/**
|
|
* Move the cursor to the appropriate location based
|
|
* on where it is in the text region.
|
|
*
|
|
* This does some additional math to set the text
|
|
* region horizontal offset.
|
|
*/
|
|
void place_cursor_actual(void) {
|
|
|
|
/* Account for the left hand gutter */
|
|
int num_size = num_width() + 3;
|
|
int x = num_size + 1 - env->coffset;
|
|
|
|
/* Determine where the cursor is physically */
|
|
for (int i = 0; i < env->col_no - 1; ++i) {
|
|
char_t * c = &env->lines[env->line_no-1]->text[i];
|
|
x += c->display_width;
|
|
}
|
|
|
|
/* y is a bit easier to calculate */
|
|
int y = env->line_no - env->offset + 1;
|
|
|
|
/* If the cursor has gone off screen to the right... */
|
|
if (x > term_width - 1) {
|
|
/* Adjust the offset appropriately to scroll horizontally */
|
|
int diff = x - (term_width - 1);
|
|
env->coffset += diff;
|
|
x -= diff;
|
|
redraw_text();
|
|
}
|
|
|
|
/* Same for scrolling horizontally to the left */
|
|
if (x < num_size + 1) {
|
|
int diff = (num_size + 1) - x;
|
|
env->coffset -= diff;
|
|
x += diff;
|
|
redraw_text();
|
|
}
|
|
|
|
/* Move the actual terminal cursor */
|
|
place_cursor(x,y);
|
|
csr_x_actual = x;
|
|
csr_y_actual = y;
|
|
|
|
/* Show the cursor */
|
|
show_cursor();
|
|
}
|
|
|
|
/**
|
|
* Handle terminal size changes
|
|
*/
|
|
void SIGWINCH_handler(int sig) {
|
|
(void)sig;
|
|
struct winsize w;
|
|
ioctl(0, TIOCGWINSZ, &w);
|
|
term_width = w.ws_col;
|
|
term_height = w.ws_row;
|
|
redraw_all();
|
|
|
|
signal(SIGWINCH, SIGWINCH_handler);
|
|
}
|
|
|
|
/**
|
|
* Run global initialization tasks
|
|
*/
|
|
void initialize(void) {
|
|
setlocale(LC_ALL, "");
|
|
|
|
buffers_avail = 4;
|
|
buffers = malloc(sizeof(buffer_t *) * buffers_avail);
|
|
|
|
struct winsize w;
|
|
ioctl(0, TIOCGWINSZ, &w);
|
|
term_width = w.ws_col;
|
|
term_height = w.ws_row;
|
|
set_unbuffered();
|
|
|
|
mouse_enable();
|
|
|
|
signal(SIGWINCH, SIGWINCH_handler);
|
|
}
|
|
|
|
/**
|
|
* Move the cursor to a specific line.
|
|
*/
|
|
void goto_line(int line) {
|
|
|
|
/* Respect file bounds */
|
|
if (line < 1) line = 1;
|
|
if (line > env->line_count) line = env->line_count;
|
|
|
|
/* Move the cursor / text region offsets */
|
|
env->coffset = 0;
|
|
env->offset = line - 1;
|
|
env->line_no = line;
|
|
env->col_no = 1;
|
|
redraw_all();
|
|
}
|
|
|
|
|
|
/**
|
|
* UTF-8 parser state
|
|
*/
|
|
static uint32_t codepoint_r;
|
|
static uint32_t state = 0;
|
|
|
|
/**
|
|
* Processs (part of) a file and add it to a buffer.
|
|
*/
|
|
void add_buffer(uint8_t * buf, int size) {
|
|
for (int i = 0; i < size; ++i) {
|
|
if (!decode(&state, &codepoint_r, buf[i])) {
|
|
uint32_t c = codepoint_r;
|
|
if (c == '\n') {
|
|
env->lines = add_line(env->lines, env->line_no);
|
|
env->col_no = 1;
|
|
env->line_no += 1;
|
|
} else {
|
|
char_t _c;
|
|
_c.codepoint = (uint32_t)c;
|
|
_c.flags = 0;
|
|
_c.display_width = codepoint_width((wchar_t)c);
|
|
line_t * line = env->lines[env->line_no - 1];
|
|
line_t * nline = line_insert(line, _c, env->col_no - 1, env->line_no-1);
|
|
if (line != nline) {
|
|
env->lines[env->line_no - 1] = nline;
|
|
}
|
|
env->col_no += 1;
|
|
}
|
|
} else if (state == UTF8_REJECT) {
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
struct syntax_definition * match_syntax(char * file) {
|
|
for (struct syntax_definition * s = syntaxes; s->name; ++s) {
|
|
for (char ** ext = s->ext; *ext; ++ext) {
|
|
int i = strlen(file);
|
|
int j = strlen(*ext);
|
|
|
|
do {
|
|
if (file[i] != (*ext)[j]) break;
|
|
if (j == 0) return s;
|
|
if (i == 0) break;
|
|
i--;
|
|
j--;
|
|
} while (1);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Create a new buffer from a file.
|
|
*/
|
|
void open_file(char * file) {
|
|
env = buffer_new();
|
|
|
|
env->loading = 1;
|
|
|
|
env->file_name = malloc(strlen(file) + 1);
|
|
memcpy(env->file_name, file, strlen(file) + 1);
|
|
|
|
setup_buffer(env);
|
|
|
|
FILE * f = fopen(file, "r");
|
|
|
|
if (!f) {
|
|
if (hilight_on_open) {
|
|
env->syntax = match_syntax(file);
|
|
}
|
|
env->loading = 0;
|
|
return;
|
|
}
|
|
|
|
size_t length;
|
|
|
|
fseek(f, 0, SEEK_END);
|
|
length = ftell(f);
|
|
fseek(f, 0, SEEK_SET);
|
|
|
|
uint8_t buf[BLOCK_SIZE];
|
|
|
|
state = 0;
|
|
|
|
/* XXX: while (!feof()) ? */
|
|
while (length > BLOCK_SIZE) {
|
|
fread(buf, BLOCK_SIZE, 1, f);
|
|
add_buffer(buf, BLOCK_SIZE);
|
|
length -= BLOCK_SIZE;
|
|
}
|
|
if (length > 0) {
|
|
fread(buf, 1, length, f);
|
|
add_buffer((uint8_t *)buf, length);
|
|
}
|
|
|
|
if (env->line_no && env->lines[env->line_no-1] && env->lines[env->line_no-1]->actual == 0) {
|
|
/* Remove blank line from end */
|
|
remove_line(env->lines, env->line_no-1);
|
|
}
|
|
|
|
if (hilight_on_open) {
|
|
env->syntax = match_syntax(file);
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
recalculate_syntax(env->lines[i],i);
|
|
}
|
|
}
|
|
|
|
env->loading = 0;
|
|
update_title();
|
|
goto_line(0);
|
|
|
|
fclose(f);
|
|
}
|
|
|
|
/**
|
|
* Clean up the terminal and exit the editor.
|
|
*/
|
|
void quit(void) {
|
|
mouse_disable();
|
|
set_buffered();
|
|
reset();
|
|
clear_screen();
|
|
printf("Thanks for flying bim!\n");
|
|
exit(0);
|
|
}
|
|
|
|
/**
|
|
* Try to quit, but don't continue if there are
|
|
* modified buffers open.
|
|
*/
|
|
void try_quit(void) {
|
|
for (int i = 0; i < buffers_len; i++ ) {
|
|
buffer_t * _env = buffers[i];
|
|
if (_env->modified) {
|
|
if (_env->file_name) {
|
|
render_error("Modifications made to file `%s` in tab %d. Aborting.", _env->file_name, i+1);
|
|
} else {
|
|
render_error("Unsaved new file in tab %d. Aborting.", i+1);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
quit();
|
|
}
|
|
|
|
/**
|
|
* Switch to the previous buffer
|
|
*/
|
|
void previous_tab(void) {
|
|
buffer_t * last = NULL;
|
|
for (int i = 0; i < buffers_len; i++) {
|
|
buffer_t * _env = buffers[i];
|
|
if (_env == env) {
|
|
if (last) {
|
|
/* Wrap around */
|
|
env = last;
|
|
redraw_all();
|
|
return;
|
|
} else {
|
|
env = buffers[buffers_len-1];
|
|
redraw_all();
|
|
return;
|
|
}
|
|
}
|
|
last = _env;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Switch to the next buffer
|
|
*/
|
|
void next_tab(void) {
|
|
for (int i = 0; i < buffers_len; i++) {
|
|
buffer_t * _env = buffers[i];
|
|
if (_env == env) {
|
|
if (i != buffers_len - 1) {
|
|
env = buffers[i+1];
|
|
redraw_all();
|
|
return;
|
|
} else {
|
|
/* Wrap around */
|
|
env = buffers[0];
|
|
redraw_all();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write active buffer to file
|
|
*/
|
|
void write_file(char * file) {
|
|
if (!file) {
|
|
render_error("Need a file to write to.");
|
|
return;
|
|
}
|
|
|
|
FILE * f = fopen(file, "w+");
|
|
|
|
if (!f) {
|
|
render_error("Failed to open file for writing.");
|
|
return;
|
|
}
|
|
|
|
/* Go through each line and convert it back to UTF-8 */
|
|
int i, j;
|
|
for (i = 0; i < env->line_count; ++i) {
|
|
line_t * line = env->lines[i];
|
|
for (j = 0; j < line->actual; j++) {
|
|
char_t c = line->text[j];
|
|
if (c.codepoint == 0) {
|
|
char buf[1] = {0};
|
|
fwrite(buf, 1, 1, f);
|
|
} else {
|
|
char tmp[8] = {0};
|
|
int i = to_eight(c.codepoint, tmp);
|
|
fwrite(tmp, i, 1, f);
|
|
}
|
|
}
|
|
fputc('\n', f);
|
|
}
|
|
fclose(f);
|
|
|
|
/* Mark it no longer modified */
|
|
env->modified = 0;
|
|
|
|
/* If there was no file name set, set one */
|
|
if (!env->file_name) {
|
|
env->file_name = malloc(strlen(file) + 1);
|
|
memcpy(env->file_name, file, strlen(file) + 1);
|
|
}
|
|
|
|
redraw_all();
|
|
}
|
|
|
|
/**
|
|
* Close the active buffer
|
|
*/
|
|
void close_buffer(void) {
|
|
buffer_t * previous_env = env;
|
|
buffer_t * new_env = buffer_close(env);
|
|
if (new_env == previous_env) {
|
|
/* ?? Failed to close buffer */
|
|
render_error("lolwat");
|
|
}
|
|
/* No more buffers, exit */
|
|
if (!new_env) {
|
|
quit();
|
|
}
|
|
/* Clean up the old buffer */
|
|
free(previous_env);
|
|
|
|
/* Set the new active buffer */
|
|
env = new_env;
|
|
|
|
/* Redraw the screen */
|
|
redraw_all();
|
|
}
|
|
|
|
/**
|
|
* Move the cursor down one line in the text region
|
|
*/
|
|
void cursor_down(void) {
|
|
/* If this isn't already the last line... */
|
|
if (env->line_no < env->line_count) {
|
|
|
|
/* Move the cursor down */
|
|
env->line_no += 1;
|
|
|
|
/*
|
|
* If the horizontal cursor position exceeds the width the new line,
|
|
* then move the cursor left to the extent of the new line.
|
|
*
|
|
* If we're in insert mode, we can go one cell beyond the end of the line
|
|
*/
|
|
if (env->col_no > env->lines[env->line_no-1]->actual + (env->mode == MODE_INSERT)) {
|
|
env->col_no = env->lines[env->line_no-1]->actual + (env->mode == MODE_INSERT);
|
|
if (env->col_no == 0) env->col_no = 1;
|
|
}
|
|
|
|
/*
|
|
* If the screen was scrolled horizontally, unscroll it;
|
|
* if it will be scrolled on this line as well, that will
|
|
* be handled by place_cursor_actual
|
|
*/
|
|
int redraw = 0;
|
|
if (env->coffset != 0) {
|
|
env->coffset = 0;
|
|
redraw = 1;
|
|
}
|
|
|
|
/* If we've scrolled past the bottom of the screen, scroll the screen */
|
|
if (env->line_no > env->offset + term_height - env->bottom_size - 1) {
|
|
env->offset += 1;
|
|
|
|
/* Tell terminal to scroll */
|
|
shift_up();
|
|
|
|
/* A new line appears on screen at the bottom, draw it */
|
|
int l = term_height - env->bottom_size - 1;
|
|
if (env->offset + l < env->line_count + 1) {
|
|
redraw_line(l-1, env->offset + l-1);
|
|
} else {
|
|
place_cursor(1, 2 + l - 1);
|
|
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
|
|
printf("~");
|
|
clear_to_end();
|
|
}
|
|
|
|
/* Redraw elements that were moved by scrolling */
|
|
redraw_tabbar();
|
|
redraw_statusbar();
|
|
redraw_commandline();
|
|
place_cursor_actual();
|
|
return;
|
|
} else if (redraw) {
|
|
/* Otherwise, if we need to redraw because of coffset change, do that */
|
|
redraw_text();
|
|
}
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move the cursor up one line in the text region
|
|
*/
|
|
void cursor_up(void) {
|
|
/* If this isn't the first line already */
|
|
if (env->line_no > 1) {
|
|
|
|
/* Move the cursor down */
|
|
env->line_no -= 1;
|
|
|
|
/*
|
|
* If the horizontal cursor position exceeds the width the new line,
|
|
* then move the cursor left to the extent of the new line.
|
|
*
|
|
* If we're in insert mode, we can go one cell beyond the end of the line
|
|
*/
|
|
if (env->col_no > env->lines[env->line_no-1]->actual + (env->mode == MODE_INSERT)) {
|
|
env->col_no = env->lines[env->line_no-1]->actual + (env->mode == MODE_INSERT);
|
|
if (env->col_no == 0) env->col_no = 1;
|
|
}
|
|
|
|
/*
|
|
* If the screen was scrolled horizontally, unscroll it;
|
|
* if it will be scrolled on this line as well, that will
|
|
* be handled by place_cursor_actual
|
|
*/
|
|
int redraw = 0;
|
|
if (env->coffset != 0) {
|
|
env->coffset = 0;
|
|
redraw = 1;
|
|
}
|
|
|
|
if (env->line_no <= env->offset) {
|
|
env->offset -= 1;
|
|
|
|
/* Tell terminal to scroll */
|
|
shift_down();
|
|
|
|
/*
|
|
* The line at the top of the screen should always be real
|
|
* so we can just call redraw_line here
|
|
*/
|
|
redraw_line(0,env->offset);
|
|
|
|
/* Redraw elements that were moved by scrolling */
|
|
redraw_tabbar();
|
|
redraw_statusbar();
|
|
redraw_commandline();
|
|
place_cursor_actual();
|
|
return;
|
|
} else if (redraw) {
|
|
/* Otherwise, if we need to redraw because of coffset change, do that */
|
|
redraw_text();
|
|
}
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move the cursor one column left.
|
|
*/
|
|
void cursor_left(void) {
|
|
if (env->col_no > 1) {
|
|
env->col_no -= 1;
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move the cursor one column right.
|
|
*/
|
|
void cursor_right(void) {
|
|
|
|
/* If this isn't already the rightmost column we can reach on this line in this mode... */
|
|
if (env->col_no < env->lines[env->line_no-1]->actual + !!(env->mode == MODE_INSERT)) {
|
|
env->col_no += 1;
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move the cursor to the fron the of the line
|
|
*/
|
|
void cursor_home(void) {
|
|
env->col_no = 1;
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
|
|
/**
|
|
* Move the cursor to the end of the line.
|
|
*
|
|
* In INSERT mode, moves one cell right of the end of the line.
|
|
* In NORMAL mode, moves the cursor to the last occupied cell.
|
|
*/
|
|
void cursor_end(void) {
|
|
env->col_no = env->lines[env->line_no-1]->actual+!!(env->mode == MODE_INSERT);
|
|
|
|
/* Update the status bar */
|
|
redraw_statusbar();
|
|
|
|
/* Place the terminal cursor again */
|
|
place_cursor_actual();
|
|
}
|
|
|
|
/**
|
|
* Leave INSERT mode
|
|
*
|
|
* If the cursor is too far right, adjust it.
|
|
* Redraw the command line.
|
|
*/
|
|
void leave_insert(void) {
|
|
if (env->col_no > env->lines[env->line_no-1]->actual) {
|
|
env->col_no = env->lines[env->line_no-1]->actual;
|
|
if (env->col_no == 0) env->col_no = 1;
|
|
}
|
|
env->mode = MODE_NORMAL;
|
|
redraw_commandline();
|
|
}
|
|
|
|
/**
|
|
* Process a user command.
|
|
*/
|
|
void process_command(char * cmd) {
|
|
/* Special case ! to run shell commands without parsing tokens */
|
|
if (*cmd == '!') {
|
|
/* Reset and draw some line feeds */
|
|
reset();
|
|
printf("\n\n");
|
|
|
|
/* Set buffered for shell application */
|
|
set_buffered();
|
|
|
|
/* Call the shell and wait for completion */
|
|
system(&cmd[1]);
|
|
|
|
/* Return to the editor, wait for user to press enter. */
|
|
set_unbuffered();
|
|
printf("\n\nPress ENTER to continue.");
|
|
fflush(stdout);
|
|
while (bim_getch() != ENTER_KEY);
|
|
|
|
/* Redraw the screen */
|
|
redraw_all();
|
|
|
|
/* Done processing command */
|
|
return;
|
|
}
|
|
|
|
/* Tokenize argument string on spaces */
|
|
char *p, *argv[512], *last;
|
|
int argc = 0;
|
|
for ((p = strtok_r(cmd, " ", &last)); p;
|
|
(p = strtok_r(NULL, " ", &last)), argc++) {
|
|
if (argc < 511) argv[argc] = p;
|
|
}
|
|
argv[argc] = NULL;
|
|
|
|
if (argc < 1) {
|
|
/* no op */
|
|
return;
|
|
}
|
|
|
|
if (!strcmp(argv[0], "e")) {
|
|
/* e: edit file */
|
|
if (argc > 1) {
|
|
/* This actually opens a new tab */
|
|
open_file(argv[1]);
|
|
} else {
|
|
/* TODO: Reopen file? */
|
|
render_error("Expected a file to open...");
|
|
}
|
|
} else if (!strcmp(argv[0], "w")) {
|
|
/* w: write file */
|
|
if (argc > 1) {
|
|
write_file(argv[1]);
|
|
} else {
|
|
write_file(env->file_name);
|
|
}
|
|
} else if (!strcmp(argv[0], "wq")) {
|
|
/* wq: write file and close buffer; if there's no file to write to, may do weird things */
|
|
write_file(env->file_name);
|
|
close_buffer();
|
|
} else if (!strcmp(argv[0], "q")) {
|
|
/* close buffer if unmodified */
|
|
if (env->modified) {
|
|
render_error("No write since last change. Use :q! to force exit.");
|
|
} else {
|
|
close_buffer();
|
|
}
|
|
} else if (!strcmp(argv[0], "q!")) {
|
|
/* close buffer without warning if unmodified */
|
|
close_buffer();
|
|
} else if (!strcmp(argv[0], "qa") || !strcmp(argv[0], "qall")) {
|
|
/* Close all */
|
|
try_quit();
|
|
} else if (!strcmp(argv[0], "qa!")) {
|
|
/* Forcefully exit editor */
|
|
quit();
|
|
} else if (!strcmp(argv[0], "tabp")) {
|
|
/* Next tab */
|
|
previous_tab();
|
|
} else if (!strcmp(argv[0], "tabn")) {
|
|
/* Previous tab */
|
|
next_tab();
|
|
} else if (!strcmp(argv[0], "help")) {
|
|
/*
|
|
* The repeated calls to redraw_commandline here make use
|
|
* of scrolling to draw this multiline help message on
|
|
* the same background as the command line.
|
|
*/
|
|
redraw_commandline(); printf("\n");
|
|
redraw_commandline(); printf(" \033[1mbim - The standard ToaruOS Text Editor\033[22m\n");
|
|
redraw_commandline(); printf("\n");
|
|
redraw_commandline(); printf(" Available commands:\n");
|
|
redraw_commandline(); printf(" Quit with \033[3m:q\033[23m, \033[3m:qa\033[23m, \033[3m:q!\033[23m, \033[3m:qa!\033[23m\n");
|
|
redraw_commandline(); printf(" Write out with \033[3m:w \033[4mfile\033[24;23m\n");
|
|
redraw_commandline(); printf(" Set syntax with \033[3m:syntax \033[4mlanguage\033[24;23m\n");
|
|
redraw_commandline(); printf(" Open a new tab with \033[3m:e \033[4mpath/to/file\033[24;23m\n");
|
|
redraw_commandline(); printf(" \033[3m:tabn\033[23m and \033[3m:tabp\033[23m can be used to switch tabs\n");
|
|
redraw_commandline(); printf("\n");
|
|
redraw_commandline(); printf(" Copyright 2013-2018 K. Lange <\033[3mklange@toaruos.org\033[23m>\n");
|
|
redraw_commandline(); printf("\n");
|
|
/* Redrawing the tabbar makes it look like we just shifted the whole view up */
|
|
redraw_tabbar();
|
|
redraw_commandline();
|
|
fflush(stdout);
|
|
/* Wait for a character so we can redraw the screen before continuing */
|
|
int c;
|
|
while ((c = bim_getch())== -1);
|
|
/* Make sure that key press actually gets used */
|
|
bim_unget(c);
|
|
/*
|
|
* Redraw everything to hide the help message and get the
|
|
* upper few lines of text on screen again
|
|
*/
|
|
redraw_all();
|
|
} else if (!strcmp(argv[0], "syntax")) {
|
|
if (argc < 2) {
|
|
render_error("syntax expects argument");
|
|
return;
|
|
}
|
|
if (!strcmp(argv[1],"none")) {
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
env->lines[i]->istate = 0;
|
|
for (int j = 0; j < env->lines[i]->actual; ++j) {
|
|
env->lines[i]->text[j].flags = 0;
|
|
}
|
|
}
|
|
redraw_all();
|
|
return;
|
|
}
|
|
for (struct syntax_definition * s = syntaxes; s->name; ++s) {
|
|
if (!strcmp(argv[1],s->name)) {
|
|
env->syntax = s;
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
env->lines[i]->istate = 0;
|
|
}
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
recalculate_syntax(env->lines[i],i);
|
|
}
|
|
redraw_all();
|
|
return;
|
|
}
|
|
}
|
|
render_error("unrecognized syntax type");
|
|
} else if (!strcmp(argv[0], "recalc")) {
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
env->lines[i]->istate = 0;
|
|
}
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
recalculate_syntax(env->lines[i],i);
|
|
}
|
|
redraw_all();
|
|
} else if (!strcmp(argv[0], "tabs")) {
|
|
env->tabs = 1;
|
|
} else if (!strcmp(argv[0], "spaces")) {
|
|
env->tabs = 0;
|
|
} else if (!strcmp(argv[0], "tabstop")) {
|
|
if (argc < 2) {
|
|
render_status_message("tabstop=%d", env->tabstop);
|
|
} else {
|
|
int t = atoi(argv[1]);
|
|
if (t > 0 && t < 32) {
|
|
env->tabstop = t;
|
|
for (int i = 0; i < env->line_count; ++i) {
|
|
recalculate_tabs(env->lines[i]);
|
|
}
|
|
redraw_all();
|
|
} else {
|
|
render_error("Invalid tabstop: %s", argv[1]);
|
|
}
|
|
}
|
|
} else if (isdigit(*argv[0])) {
|
|
/* Go to line number */
|
|
goto_line(atoi(argv[0]));
|
|
} else {
|
|
/* Unrecognized command */
|
|
render_error("Not an editor command: %s", argv[0]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Tab completion for command mode.
|
|
*/
|
|
void command_tab_complete(char * buffer) {
|
|
/* Figure out which argument this is and where it starts */
|
|
int arg = 0;
|
|
char * buf = strdup(buffer);
|
|
char * b = buf;
|
|
|
|
char * args[32];
|
|
|
|
int candidate_count= 0;
|
|
int candidate_space = 4;
|
|
char ** candidates = malloc(sizeof(char*)*candidate_space);
|
|
|
|
/* Accept whitespace before first argument */
|
|
while (*b == ' ') b++;
|
|
char * start = b;
|
|
args[0] = start;
|
|
while (*b && *b != ' ') b++;
|
|
while (*b) {
|
|
while (*b == ' ') {
|
|
*b = '\0';
|
|
b++;
|
|
}
|
|
start = b;
|
|
arg++;
|
|
if (arg < 32) {
|
|
args[arg] = start;
|
|
}
|
|
while (*b && *b != ' ') b++;
|
|
}
|
|
|
|
/**
|
|
* Check a possible candidate and add it to the
|
|
* candidates list, expanding as necessary,
|
|
* if it matches for the current argument.
|
|
*/
|
|
void add_candidate(char * candidate) {
|
|
char * _arg = args[arg];
|
|
int r = strncmp(_arg, candidate, strlen(_arg));
|
|
if (!r) {
|
|
if (candidate_count == candidate_space) {
|
|
candidate_space *= 2;
|
|
candidates = realloc(candidates,sizeof(char *) * candidate_space);
|
|
}
|
|
candidates[candidate_count] = strdup(candidate);
|
|
candidate_count++;
|
|
}
|
|
}
|
|
|
|
if (arg == 0) {
|
|
/* Complete command names */
|
|
add_candidate("help");
|
|
add_candidate("recalc");
|
|
add_candidate("syntax");
|
|
add_candidate("tabn");
|
|
add_candidate("tabp");
|
|
goto _accept_candidate;
|
|
}
|
|
|
|
if (arg == 1 && !strcmp(args[0], "syntax")) {
|
|
/* Complete syntax options */
|
|
add_candidate("none");
|
|
for (struct syntax_definition * s = syntaxes; s->name; ++s) {
|
|
add_candidate(s->name);
|
|
}
|
|
goto _accept_candidate;
|
|
}
|
|
|
|
if (arg == 1 && !strcmp(args[0], "e")) {
|
|
/* Complete file paths */
|
|
|
|
/* First, find the deepest directory match */
|
|
char * tmp = strdup(args[arg]);
|
|
char * last_slash = strrchr(tmp, '/');
|
|
DIR * dirp;
|
|
if (last_slash) {
|
|
*last_slash = '\0';
|
|
if (last_slash == tmp) {
|
|
/* Started with slash, and it was the only slash */
|
|
dirp = opendir("/");
|
|
} else {
|
|
dirp = opendir(tmp);
|
|
}
|
|
} else {
|
|
/* No directory match, completing from current directory */
|
|
dirp = opendir(".");
|
|
tmp[0] = '\0';
|
|
}
|
|
|
|
if (!dirp) {
|
|
/* Directory match doesn't exist, no candidates to populate */
|
|
free(tmp);
|
|
goto done;
|
|
}
|
|
|
|
struct dirent * ent = readdir(dirp);
|
|
while (ent != NULL) {
|
|
if (ent->d_name[0] != '.') {
|
|
struct stat statbuf;
|
|
/* Figure out if this file is a directory */
|
|
if (last_slash) {
|
|
char * x = malloc(strlen(tmp) + 1 + strlen(ent->d_name) + 1);
|
|
sprintf(x,"%s/%s",tmp,ent->d_name);
|
|
lstat(x, &statbuf);
|
|
free(x);
|
|
} else {
|
|
lstat(ent->d_name, &statbuf);
|
|
}
|
|
|
|
/* Build the complete argument name to tab complete */
|
|
char s[1024] = {0};
|
|
if (last_slash == tmp) {
|
|
strcat(s,"/");
|
|
} else if (*tmp) {
|
|
strcat(s,tmp);
|
|
strcat(s,"/");
|
|
}
|
|
strcat(s,ent->d_name);
|
|
/*
|
|
* If it is a directory, add a / to the end so the next completion
|
|
* attempt will complete the directory's contents.
|
|
*/
|
|
if (S_ISDIR(statbuf.st_mode)) {
|
|
strcat(s,"/");
|
|
}
|
|
add_candidate(s);
|
|
}
|
|
ent = readdir(dirp);
|
|
}
|
|
closedir(dirp);
|
|
free(tmp);
|
|
goto _accept_candidate;
|
|
}
|
|
|
|
_accept_candidate:
|
|
if (candidate_count == 0) {
|
|
redraw_statusbar();
|
|
goto done;
|
|
}
|
|
|
|
if (candidate_count == 1) {
|
|
/* Only one completion possibility */
|
|
redraw_statusbar();
|
|
|
|
/* Fill out the rest of the command */
|
|
char * cstart = (buffer) + (start - buf);
|
|
for (unsigned int i = 0; i < strlen(candidates[0]); ++i) {
|
|
*cstart = candidates[0][i];
|
|
cstart++;
|
|
}
|
|
*cstart = '\0';
|
|
} else {
|
|
/* Print candidates in status bar */
|
|
char tmp[term_width+1];
|
|
memset(tmp, 0, term_width+1);
|
|
int offset = 0;
|
|
for (int i = 0; i < candidate_count; ++i) {
|
|
if (offset + 1 + (signed)strlen(candidates[i]) > term_width - 5) {
|
|
strcat(tmp, "...");
|
|
break;
|
|
}
|
|
if (offset > 0) {
|
|
strcat(tmp, " ");
|
|
offset++;
|
|
}
|
|
strcat(tmp, candidates[i]);
|
|
offset += strlen(candidates[i]);
|
|
}
|
|
render_status_message("%s", tmp);
|
|
|
|
/* Complete to longest common substring */
|
|
char * cstart = (buffer) + (start - buf);
|
|
for (int i = 0; i < 1023 /* max length of command */; i++) {
|
|
for (int j = 1; j < candidate_count; ++j) {
|
|
if (candidates[0][i] != candidates[j][i]) goto _reject;
|
|
}
|
|
*cstart = candidates[0][i];
|
|
cstart++;
|
|
}
|
|
/* End of longest common substring */
|
|
_reject:
|
|
*cstart = '\0';
|
|
}
|
|
|
|
/* Free candidates */
|
|
for (int i = 0; i < candidate_count; ++i) {
|
|
free(candidates[i]);
|
|
}
|
|
|
|
/* Redraw command line */
|
|
done:
|
|
redraw_commandline();
|
|
printf(":%s", buffer);
|
|
|
|
free(candidates);
|
|
free(buf);
|
|
}
|
|
|
|
/**
|
|
* Command mode
|
|
*
|
|
* Accept a user command and then process it and
|
|
* return to normal mode.
|
|
*
|
|
* TODO: We only have basic line editing here; it might be
|
|
* nice to add more advanced line editing, like cursor
|
|
* movement, tab completion, etc. This is easier than
|
|
* with the shell since we have a lot more control over
|
|
* where the command input bar is rendered.
|
|
*/
|
|
void command_mode(void) {
|
|
char c;
|
|
char buffer[1024] = {0};
|
|
int buffer_len = 0;
|
|
|
|
redraw_commandline();
|
|
printf(":");
|
|
show_cursor();
|
|
|
|
while ((c = bim_getch())) {
|
|
if (c == -1) {
|
|
/* Time out */
|
|
continue;
|
|
}
|
|
if (c == '\033') {
|
|
/* Escape, cancel command */
|
|
break;
|
|
} else if (c == ENTER_KEY) {
|
|
/* Enter, run command */
|
|
process_command(buffer);
|
|
break;
|
|
} else if (c == '\t') {
|
|
/* Handle tab completion */
|
|
command_tab_complete(buffer);
|
|
buffer_len = strlen(buffer);
|
|
} else if (c == BACKSPACE_KEY || c == DELETE_KEY) {
|
|
/* Backspace, delete last character in command buffer */
|
|
if (buffer_len > 0) {
|
|
buffer_len -= 1;
|
|
buffer[buffer_len] = '\0';
|
|
redraw_commandline();
|
|
printf(":%s", buffer);
|
|
} else {
|
|
/* If backspaced through entire command, cancel command mode */
|
|
redraw_commandline();
|
|
break;
|
|
}
|
|
} else {
|
|
/* Regular character */
|
|
buffer[buffer_len] = c;
|
|
buffer_len++;
|
|
printf("%c", c);
|
|
}
|
|
show_cursor();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Search forward from the given cursor position
|
|
* to find a basic search match.
|
|
*
|
|
* This could be more complicated...
|
|
*/
|
|
void find_match(int from_line, int from_col, int * out_line, int * out_col, char * str) {
|
|
int col = from_col;
|
|
for (int i = from_line; i <= env->line_count; ++i) {
|
|
line_t * line = env->lines[i - 1];
|
|
|
|
int j = col - 1;
|
|
while (j < line->actual + 1) {
|
|
int k = j;
|
|
char * match = str;
|
|
while (k < line->actual + 1) {
|
|
if (*match == '\0') {
|
|
*out_line = i;
|
|
*out_col = j + 1;
|
|
return;
|
|
}
|
|
/* TODO search for UTF-8 sequences? */
|
|
if (*match != line->text[k].codepoint) break;
|
|
match++;
|
|
k++;
|
|
}
|
|
j++;
|
|
}
|
|
col = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Draw the matched search result.
|
|
*/
|
|
void draw_search_match(int line, char * buffer, int redraw_buffer) {
|
|
place_cursor_actual();
|
|
redraw_text();
|
|
if (line != -1) {
|
|
/*
|
|
* TODO this should probably mark the relevant
|
|
* regions so that redraw_text can hilight it
|
|
*/
|
|
set_colors(COLOR_SEARCH_FG, COLOR_SEARCH_BG);
|
|
place_cursor_actual();
|
|
|
|
printf("%s", buffer);
|
|
}
|
|
redraw_statusbar();
|
|
redraw_commandline();
|
|
if (redraw_buffer) {
|
|
printf("/%s", buffer);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Search mode
|
|
*
|
|
* Search text for substring match.
|
|
*/
|
|
void search_mode(void) {
|
|
char c;
|
|
char buffer[1024] = {0};
|
|
int buffer_len = 0;
|
|
|
|
/* Remember where the cursor is so we can cancel */
|
|
int prev_line = env->line_no;
|
|
int prev_col = env->col_no;
|
|
int prev_coffset = env->coffset;
|
|
int prev_offset = env->offset;
|
|
|
|
redraw_commandline();
|
|
printf("/");
|
|
show_cursor();
|
|
|
|
while ((c = bim_getch())) {
|
|
if (c == -1) {
|
|
/* Time out */
|
|
continue;
|
|
}
|
|
if (c == '\033') {
|
|
/* Cancel search */
|
|
env->line_no = prev_line;
|
|
env->col_no = prev_col;
|
|
redraw_all();
|
|
break;
|
|
} else if (c == ENTER_KEY) {
|
|
/* Exit search */
|
|
if (env->search) {
|
|
free(env->search);
|
|
}
|
|
env->search = strdup(buffer);
|
|
break;
|
|
} else if (c == BACKSPACE_KEY || c == DELETE_KEY) {
|
|
/* Backspace, delete last character in search buffer */
|
|
if (buffer_len > 0) {
|
|
buffer_len -= 1;
|
|
buffer[buffer_len] = '\0';
|
|
/* Search from beginning to find first match */
|
|
int line = -1, col = -1;
|
|
find_match(prev_line, prev_col, &line, &col, buffer);
|
|
|
|
if (line != -1) {
|
|
env->coffset = 0;
|
|
env->offset = line - 1;
|
|
env->col_no = col;
|
|
env->line_no = line;
|
|
}
|
|
|
|
draw_search_match(line, buffer, 1);
|
|
|
|
} else {
|
|
/* If backspaced through entire search term, cancel search */
|
|
redraw_commandline();
|
|
env->coffset = prev_coffset;
|
|
env->offset = prev_offset;
|
|
env->col_no = prev_col;
|
|
env->line_no = prev_line;
|
|
redraw_all();
|
|
break;
|
|
}
|
|
} else {
|
|
/* Regular character */
|
|
buffer[buffer_len] = c;
|
|
buffer_len++;
|
|
buffer[buffer_len] = '\0';
|
|
printf("%c", c);
|
|
|
|
/* Find the next search match */
|
|
int line = -1, col = -1;
|
|
find_match(prev_line, prev_col, &line, &col, buffer);
|
|
|
|
if (line != -1) {
|
|
env->coffset = 0;
|
|
env->offset = line - 1;
|
|
env->col_no = col;
|
|
env->line_no = line;
|
|
} else {
|
|
env->coffset = prev_coffset;
|
|
env->offset = prev_offset;
|
|
env->col_no = prev_col;
|
|
env->line_no = prev_line;
|
|
}
|
|
draw_search_match(line, buffer, 1);
|
|
}
|
|
show_cursor();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find the next search result, or loop back around if at the end.
|
|
*/
|
|
void search_next(void) {
|
|
if (!env->search) return;
|
|
int line = -1, col = -1;
|
|
find_match(env->line_no, env->col_no+1, &line, &col, env->search);
|
|
|
|
if (line == -1) {
|
|
find_match(1,1, &line, &col, env->search);
|
|
if (line == -1) return;
|
|
}
|
|
|
|
env->coffset = 0;
|
|
env->offset = line - 1;
|
|
env->col_no = col;
|
|
env->line_no = line;
|
|
draw_search_match(line, env->search, 0);
|
|
}
|
|
|
|
/**
|
|
* Handle mouse event
|
|
*/
|
|
void handle_mouse(void) {
|
|
int buttons = bim_getch() - 32;
|
|
int x = bim_getch() - 32;
|
|
int y = bim_getch() - 32;
|
|
|
|
if (buttons == 64) {
|
|
/* Scroll up */
|
|
for (int i = 0; i < 5; ++i) {
|
|
cursor_up();
|
|
}
|
|
return;
|
|
} else if (buttons == 65) {
|
|
/* Scroll down */
|
|
for (int i = 0; i < 5; ++i) {
|
|
cursor_down();
|
|
}
|
|
return;
|
|
} else if (buttons == 3) {
|
|
/* Move cursor to position */
|
|
|
|
if (x < 0) return;
|
|
if (y < 0) return;
|
|
|
|
if (y == 1) {
|
|
/* Pick from tabs */
|
|
int _x = 0;
|
|
for (int i = 0; i < buffers_len; i++) {
|
|
buffer_t * _env = buffers[i];
|
|
if (_env->modified) {
|
|
_x += 2;
|
|
}
|
|
if (_env->file_name) {
|
|
_x += 2 + strlen(_env->file_name);
|
|
} else {
|
|
_x += strlen(" [No Name] ");
|
|
}
|
|
if (_x > x) {
|
|
env = buffers[i];
|
|
redraw_all();
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Figure out y coordinate */
|
|
int line_no = y + env->offset - 1;
|
|
int col_no = -1;
|
|
|
|
if (line_no > env->line_count) {
|
|
line_no = env->line_count;
|
|
}
|
|
|
|
/* Account for the left hand gutter */
|
|
int num_size = num_width() + 3;
|
|
int _x = num_size - (line_no == env->line_no ? env->coffset : 0);
|
|
|
|
/* Determine where the cursor is physically */
|
|
for (int i = 0; i < env->lines[line_no-1]->actual; ++i) {
|
|
char_t * c = &env->lines[line_no-1]->text[i];
|
|
_x += c->display_width;
|
|
if (_x > x) {
|
|
col_no = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (col_no == -1 || col_no > env->lines[line_no-1]->actual) {
|
|
col_no = env->lines[line_no-1]->actual;
|
|
}
|
|
|
|
env->line_no = line_no;
|
|
env->col_no = col_no;
|
|
place_cursor_actual();
|
|
}
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Append a character at the current cursor point.
|
|
*/
|
|
void insert_char(unsigned int c) {
|
|
char_t _c;
|
|
_c.codepoint = c;
|
|
_c.flags = 0;
|
|
_c.display_width = codepoint_width(c);
|
|
line_t * line = env->lines[env->line_no - 1];
|
|
line_t * nline = line_insert(line, _c, env->col_no - 1, env->line_no - 1);
|
|
if (line != nline) {
|
|
env->lines[env->line_no - 1] = nline;
|
|
}
|
|
redraw_line(env->line_no - env->offset - 1, env->line_no-1);
|
|
env->col_no += 1;
|
|
set_modified();
|
|
}
|
|
|
|
/**
|
|
* INSERT mode
|
|
*
|
|
* Accept input into the text buffer.
|
|
*/
|
|
void insert_mode(void) {
|
|
int cin;
|
|
uint32_t c;
|
|
|
|
/* Set mode line */
|
|
env->mode = MODE_INSERT;
|
|
redraw_commandline();
|
|
|
|
/* Place the cursor in the text area */
|
|
place_cursor_actual();
|
|
|
|
int timeout = 0;
|
|
int this_buf[20];
|
|
uint32_t istate = 0;
|
|
while ((cin = bim_getch())) {
|
|
if (cin == -1) {
|
|
if (timeout && this_buf[timeout-1] == '\033') {
|
|
leave_insert();
|
|
return;
|
|
}
|
|
timeout = 0;
|
|
continue;
|
|
}
|
|
if (!decode(&istate, &c, cin)) {
|
|
switch (c) {
|
|
case '\033':
|
|
if (timeout == 0) {
|
|
this_buf[timeout] = c;
|
|
timeout++;
|
|
} else if (timeout == 1 && this_buf[0] == '\033') {
|
|
leave_insert();
|
|
bim_unget(c);
|
|
return;
|
|
}
|
|
break;
|
|
case DELETE_KEY:
|
|
case BACKSPACE_KEY:
|
|
if (env->col_no > 1) {
|
|
line_delete(env->lines[env->line_no - 1], env->col_no - 1, env->line_no - 1);
|
|
env->col_no -= 1;
|
|
redraw_line(env->line_no - env->offset - 1, env->line_no-1);
|
|
set_modified();
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
} else if (env->line_no > 1) {
|
|
int tmp = env->lines[env->line_no - 2]->actual;
|
|
merge_lines(env->lines, env->line_no - 1);
|
|
env->line_no -= 1;
|
|
env->col_no = tmp+1;
|
|
redraw_text();
|
|
set_modified();
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
}
|
|
break;
|
|
case ENTER_KEY:
|
|
if (env->col_no == env->lines[env->line_no - 1]->actual + 1) {
|
|
env->lines = add_line(env->lines, env->line_no);
|
|
} else {
|
|
/* oh oh god we're all gonna die */
|
|
env->lines = split_line(env->lines, env->line_no, env->col_no - 1);
|
|
}
|
|
env->col_no = 1;
|
|
env->line_no += 1;
|
|
if (env->line_no > env->offset + term_height - env->bottom_size - 1) {
|
|
env->offset += 1;
|
|
}
|
|
redraw_text();
|
|
set_modified();
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
break;
|
|
case '\t':
|
|
if (env->tabs) {
|
|
insert_char('\t');
|
|
} else {
|
|
for (int i = 0; i < env->tabstop; ++i) {
|
|
insert_char(' ');
|
|
}
|
|
}
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
break;
|
|
default:
|
|
{
|
|
if (timeout == 1 && c == '[' && this_buf[0] == '\033') {
|
|
this_buf[1] = c;
|
|
timeout++;
|
|
continue;
|
|
} else if (timeout == 1 && c != '[') {
|
|
leave_insert();
|
|
bim_unget(c);
|
|
return;
|
|
}
|
|
if (timeout == 2 && this_buf[0] == '\033' && this_buf[1] == '[') {
|
|
switch (c) {
|
|
case 'M':
|
|
handle_mouse();
|
|
break;
|
|
case 'A': // up
|
|
cursor_up();
|
|
break;
|
|
case 'B': // down
|
|
cursor_down();
|
|
break;
|
|
case 'C': // right
|
|
cursor_right();
|
|
break;
|
|
case 'D': // left
|
|
cursor_left();
|
|
break;
|
|
case 'H': // home
|
|
cursor_home();
|
|
break;
|
|
case 'F': // end
|
|
cursor_end();
|
|
break;
|
|
case '6':
|
|
if (bim_getch() == '~') {
|
|
/* Page down */
|
|
goto_line(env->line_no + term_height - 6);
|
|
}
|
|
break;
|
|
case '5':
|
|
if (bim_getch() == '~') {
|
|
/* Page up */
|
|
goto_line(env->line_no - (term_height - 6));
|
|
}
|
|
break;
|
|
case '3':
|
|
if (bim_getch() == '~') {
|
|
/* Page up */
|
|
if (env->col_no < env->lines[env->line_no - 1]->actual + 1) {
|
|
line_delete(env->lines[env->line_no - 1], env->col_no, env->line_no - 1);
|
|
redraw_line(env->line_no - env->offset - 1, env->line_no-1);
|
|
set_modified();
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
} else if (env->line_no < env->line_count) {
|
|
merge_lines(env->lines, env->line_no);
|
|
redraw_text();
|
|
set_modified();
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
timeout = 0;
|
|
continue;
|
|
}
|
|
timeout = 0;
|
|
insert_char(c);
|
|
redraw_statusbar();
|
|
place_cursor_actual();
|
|
}
|
|
break;
|
|
}
|
|
} else if (istate == UTF8_REJECT) {
|
|
istate = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void show_usage(char * argv[]) {
|
|
printf(
|
|
"bim - Text editor\n"
|
|
"\n"
|
|
"usage: %s [-s] [path]\n"
|
|
"\n"
|
|
" -s \033[3mdisable automatic syntax highlighting\033[0m\n"
|
|
" -? \033[3mshow this help text\033[0m\n"
|
|
"\n", argv[0]);
|
|
}
|
|
|
|
|
|
int main(int argc, char * argv[]) {
|
|
int opt;
|
|
while ((opt = getopt(argc, argv, "?s")) != -1) {
|
|
switch (opt) {
|
|
case 's':
|
|
hilight_on_open = 0;
|
|
break;
|
|
case '?':
|
|
show_usage(argv);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
initialize();
|
|
|
|
if (argc > optind) {
|
|
open_file(argv[optind]);
|
|
} else {
|
|
env = buffer_new();
|
|
update_title();
|
|
setup_buffer(env);
|
|
}
|
|
|
|
redraw_all();
|
|
|
|
while (1) {
|
|
place_cursor_actual();
|
|
char c;
|
|
int timeout = 0;
|
|
int this_buf[20];
|
|
while ((c = bim_getch())) {
|
|
switch (c) {
|
|
case '\033':
|
|
if (timeout == 0) {
|
|
this_buf[timeout] = c;
|
|
timeout++;
|
|
}
|
|
break;
|
|
case DELETE_KEY:
|
|
case BACKSPACE_KEY:
|
|
cursor_left();
|
|
break;
|
|
case ':':
|
|
/* Switch to command mode */
|
|
command_mode();
|
|
break;
|
|
case '/':
|
|
/* Switch to search mode */
|
|
search_mode();
|
|
break;
|
|
case 'n':
|
|
search_next();
|
|
break;
|
|
case 'j':
|
|
cursor_down();
|
|
break;
|
|
case 'k':
|
|
cursor_up();
|
|
break;
|
|
case 'h':
|
|
cursor_left();
|
|
break;
|
|
case 'l':
|
|
cursor_right();
|
|
break;
|
|
case 'd':
|
|
remove_line(env->lines, env->line_no-1);
|
|
env->col_no = 1;
|
|
if (env->line_no > env->line_count) {
|
|
env->line_no--;
|
|
}
|
|
redraw_text();
|
|
set_modified();
|
|
place_cursor_actual();
|
|
break;
|
|
case ' ':
|
|
goto_line(env->line_no + term_height - 6);
|
|
break;
|
|
case 'O':
|
|
{
|
|
env->lines = add_line(env->lines, env->line_no-1);
|
|
env->col_no = 1;
|
|
redraw_text();
|
|
set_modified();
|
|
place_cursor_actual();
|
|
goto _insert;
|
|
}
|
|
case 'o':
|
|
{
|
|
env->lines = add_line(env->lines, env->line_no);
|
|
env->col_no = 1;
|
|
env->line_no += 1;
|
|
if (env->line_no > env->offset + term_height - env->bottom_size - 1) {
|
|
env->offset += 1;
|
|
}
|
|
redraw_text();
|
|
set_modified();
|
|
place_cursor_actual();
|
|
goto _insert;
|
|
}
|
|
case 'a':
|
|
if (env->col_no < env->lines[env->line_no-1]->actual + 1) {
|
|
env->col_no += 1;
|
|
}
|
|
goto _insert;
|
|
case '$':
|
|
env->col_no = env->lines[env->line_no-1]->actual+1;
|
|
break;
|
|
case '0':
|
|
env->col_no = 1;
|
|
break;
|
|
case 'i':
|
|
_insert:
|
|
insert_mode();
|
|
redraw_statusbar();
|
|
redraw_commandline();
|
|
timeout = 0;
|
|
break;
|
|
default:
|
|
if (timeout == 1 && c == '[' && this_buf[0] == '\033') {
|
|
this_buf[1] = c;
|
|
timeout++;
|
|
continue;
|
|
}
|
|
if (timeout == 2 && this_buf[0] == '\033' && this_buf[1] == '[') {
|
|
switch (c) {
|
|
case 'M':
|
|
handle_mouse();
|
|
break;
|
|
case 'A': // up
|
|
cursor_up();
|
|
break;
|
|
case 'B': // down
|
|
cursor_down();
|
|
break;
|
|
case 'C': // right
|
|
cursor_right();
|
|
break;
|
|
case 'D': // left
|
|
cursor_left();
|
|
break;
|
|
case 'H': // home
|
|
cursor_home();
|
|
break;
|
|
case 'F': // end
|
|
cursor_end();
|
|
break;
|
|
case '6':
|
|
if (bim_getch() == '~') {
|
|
/* Page down */
|
|
goto_line(env->line_no + term_height - 6);
|
|
}
|
|
break;
|
|
case '5':
|
|
if (bim_getch() == '~') {
|
|
/* Page up */
|
|
goto_line(env->line_no - (term_height - 6));
|
|
}
|
|
break;
|
|
}
|
|
timeout = 0;
|
|
continue;
|
|
}
|
|
timeout = 0;
|
|
break;
|
|
}
|
|
place_cursor_actual();
|
|
}
|
|
printf("%c", c);
|
|
}
|
|
|
|
return 0;
|
|
}
|