/* Bim - A Text Editor
*
* Copyright (C) 2012-2021 K. Lange
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "bim.h"
#include <kuroko/kuroko.h>
#include <kuroko/vm.h>
#include <kuroko/debug.h>
#include <kuroko/util.h>
#include <kuroko/scanner.h>
global_config_t global_config = {
/* State */
.term_width = 0,
.term_height = 0,
.bottom_size = 2,
.yanks = NULL,
.yank_count = 0,
.yank_is_full_lines = 0,
.tty_in = STDIN_FILENO,
.bimrc_path = "~/.bim3rc",
.syntax_fallback = NULL, /* Syntax to fall back to if no other match applies */
.search = NULL,
.overlay_mode = OVERLAY_MODE_NONE,
.command_buffer = NULL,
.command_offset = 0,
.command_col_no = 0,
.history_point = -1,
/* Bitset starts here */
.highlight_on_open = 1,
.initial_file_is_read_only = 0,
.go_to_line = 1,
.break_from_selection = 1,
/* Terminal capabilities */
.can_scroll = 1,
.can_hideshow = 1,
.can_altscreen = 1,
.can_mouse = 1,
.can_unicode = 1,
.can_bright = 1,
.can_title = 1,
.can_bce = 1,
.can_24bit = 1, /* can use 24-bit color */
.can_256color = 1, /* can use 265 colors */
.can_italic = 1, /* can use italics (without inverting) */
.can_insert = 0, /* ^[[L */
.can_bracketedpaste = 0, /* puts escapes before and after pasted stuff */
.can_sgrmouse = 0, /* Whether SGR mouse mode is availabe (large coordinates) */
/* Configuration options */
.history_enabled = 1,
.highlight_parens = 1, /* highlight parens/braces when cursor moves */
.smart_case = 1, /* smart case-sensitivity while searching */
.highlight_current_line = 1,
.shift_scrolling = 1, /* shift rather than moving cursor*/
.check_git = 0,
.color_gutter = 1, /* shows modified lines */
.relative_lines = 0,
.numbers = 1,
.horizontal_shift_scrolling = 0, /* Whether to shift the whole screen when scrolling horizontally */
.hide_statusbar = 0,
.tabs_visible = 1,
.autohide_tabs = 0,
.smart_complete = 0,
.has_terminal = 0,
.search_wraps = 1,
.had_error = 0,
.use_biminfo = 1,
/* Integer config values */
.cursor_padding = 4,
.split_percent = 50,
.scroll_amount = 5,
.tab_offset = 0,
.background_task = NULL,
.tail_task = NULL,
};
struct key_name_map KeyNames[] = {
{KEY_TIMEOUT, "[timeout]"},
{KEY_BACKSPACE, "<backspace>"},
{KEY_ENTER, "<enter>"},
{KEY_ESCAPE, "<escape>"},
{KEY_TAB, "<tab>"},
{' ', "<space>"},
/* These are mostly here for markdown output. */
{'`', "<backtick>"},
{'|', "<pipe>"},
{KEY_DELETE, "<del>"},
{KEY_MOUSE, "<mouse>"},
{KEY_MOUSE_SGR, "<mouse-sgr>"},
{KEY_F1, "<f1>"},{KEY_F2, "<f2>"},{KEY_F3, "<f3>"},{KEY_F4, "<f4>"},
{KEY_F5, "<f5>"},{KEY_F6, "<f6>"},{KEY_F7, "<f7>"},{KEY_F8, "<f8>"},
{KEY_F9, "<f9>"},{KEY_F10, "<f10>"},{KEY_F11, "<f11>"},{KEY_F12, "<f12>"},
{KEY_HOME,"<home>"},{KEY_END,"<end>"},{KEY_PAGE_UP,"<page-up>"},{KEY_PAGE_DOWN,"<page-down>"},
{KEY_UP, "<up>"},{KEY_DOWN, "<down>"},{KEY_RIGHT, "<right>"},{KEY_LEFT, "<left>"},
{KEY_SHIFT_UP, "<shift-up>"},{KEY_SHIFT_DOWN, "<shift-down>"},{KEY_SHIFT_RIGHT, "<shift-right>"},{KEY_SHIFT_LEFT, "<shift-left>"},
{KEY_CTRL_UP, "<ctrl-up>"},{KEY_CTRL_DOWN, "<ctrl-down>"},{KEY_CTRL_RIGHT, "<ctrl-right>"},{KEY_CTRL_LEFT, "<ctrl-left>"},
{KEY_ALT_UP, "<alt-up>"},{KEY_ALT_DOWN, "<alt-down>"},{KEY_ALT_RIGHT, "<alt-right>"},{KEY_ALT_LEFT, "<alt-left>"},
{KEY_ALT_SHIFT_UP, "<alt-shift-up>"},{KEY_ALT_SHIFT_DOWN, "<alt-shift-down>"},{KEY_ALT_SHIFT_RIGHT, "<alt-shift-right>"},{KEY_ALT_SHIFT_LEFT, "<alt-shift-left>"},
{KEY_SHIFT_TAB,"<shift-tab>"},
{KEY_PASTE_BEGIN,"<paste-begin>"},{KEY_PASTE_END,"<paste-end>"},
};
char * name_from_key(enum Key keycode) {
for (unsigned int i = 0; i < sizeof(KeyNames)/sizeof(KeyNames[0]); ++i) {
if (KeyNames[i].keycode == keycode) return KeyNames[i].name;
}
static char keyNameTmp[8] = {0};
if (keycode <= KEY_CTRL_UNDERSCORE) {
keyNameTmp[0] = '^';
keyNameTmp[1] = '@' + keycode;
keyNameTmp[2] = 0;
return keyNameTmp;
}
to_eight(keycode, keyNameTmp);
return keyNameTmp;
}
#define S(c) (krk_copyString(c,sizeof(c)-1))
static KrkClass * syntaxStateClass = NULL;
struct SyntaxState {
KrkInstance inst;
struct syntax_state state;
};
static void schedule_complete_recalc(void);
/**
* Theming data
*
* This default set is pretty simple "default foreground on default background"
* except for search and selections which are black-on-white specifically.
*
* The theme colors get set by separate configurable theme scripts.
*/
const char * COLOR_FG = "@9";
const char * COLOR_BG = "@9";
const char * COLOR_ALT_FG = "@9";
const char * COLOR_ALT_BG = "@9";
const char * COLOR_NUMBER_FG = "@9";
const char * COLOR_NUMBER_BG = "@9";
const char * COLOR_STATUS_FG = "@9";
const char * COLOR_STATUS_BG = "@9";
const char * COLOR_STATUS_ALT= "@9";
const char * COLOR_TABBAR_BG = "@9";
const char * COLOR_TAB_BG = "@9";
const char * COLOR_ERROR_FG = "@9";
const char * COLOR_ERROR_BG = "@9";
const char * COLOR_SEARCH_FG = "@0";
const char * COLOR_SEARCH_BG = "@17";
const char * COLOR_KEYWORD = "@9";
const char * COLOR_STRING = "@9";
const char * COLOR_COMMENT = "@9";
const char * COLOR_TYPE = "@9";
const char * COLOR_PRAGMA = "@9";
const char * COLOR_NUMERAL = "@9";
const char * COLOR_SELECTFG = "@0";
const char * COLOR_SELECTBG = "@17";
const char * COLOR_RED = "@1";
const char * COLOR_GREEN = "@2";
const char * COLOR_BOLD = "@9";
const char * COLOR_LINK = "@9";
const char * COLOR_ESCAPE = "@9";
const char * current_theme = "none";
struct ColorName color_names[] = {
{"text-fg", &COLOR_FG},
{"text-bg", &COLOR_BG},
{"alternate-fg", &COLOR_ALT_FG},
{"alternate-bg", &COLOR_ALT_BG},
{"number-fg", &COLOR_NUMBER_FG},
{"number-bg", &COLOR_NUMBER_BG},
{"status-fg", &COLOR_STATUS_FG},
{"status-bg", &COLOR_STATUS_BG},
{"status-alt", &COLOR_STATUS_ALT},
{"tabbar-bg", &COLOR_TABBAR_BG},
{"tab-bg", &COLOR_TAB_BG},
{"error-fg", &COLOR_ERROR_FG},
{"error-bg", &COLOR_ERROR_BG},
{"search-fg", &COLOR_SEARCH_FG},
{"search-bg", &COLOR_SEARCH_BG},
{"keyword", &COLOR_KEYWORD},
{"string", &COLOR_STRING},
{"comment", &COLOR_COMMENT},
{"type", &COLOR_TYPE},
{"pragma", &COLOR_PRAGMA},
{"numeral", &COLOR_NUMERAL},
{"select-fg", &COLOR_SELECTFG},
{"select-bg", &COLOR_SELECTBG},
{"red", &COLOR_RED},
{"green", &COLOR_GREEN},
{"bold", &COLOR_BOLD},
{"link", &COLOR_LINK},
{"escape", &COLOR_ESCAPE},
{NULL,NULL},
};
#define FLEXIBLE_ARRAY(name, add_name, type, zero) \
int flex_ ## name ## _count = 0; \
int flex_ ## name ## _space = 0; \
type * name = NULL; \
void add_name (type input) { \
if (flex_ ## name ## _space == 0) { \
flex_ ## name ## _space = 4; \
name = calloc(sizeof(type), flex_ ## name ## _space); \
} else if (flex_ ## name ## _count + 1 == flex_ ## name ## _space) { \
flex_ ## name ## _space *= 2; \
name = realloc(name, sizeof(type) * flex_ ## name ## _space); \
for (int i = flex_ ## name ## _count; i < flex_ ## name ## _space; ++i) name[i] = zero; \
} \
name[flex_ ## name ## _count] = input; \
flex_ ## name ## _count ++; \
}
FLEXIBLE_ARRAY(mappable_actions, add_action, struct action_def, ((struct action_def){NULL,NULL,0,NULL}))
FLEXIBLE_ARRAY(regular_commands, add_command, struct command_def, ((struct command_def){NULL,NULL,NULL}))
FLEXIBLE_ARRAY(prefix_commands, add_prefix_command, struct command_def, ((struct command_def){NULL,NULL,NULL}))
FLEXIBLE_ARRAY(themes, add_colorscheme, struct theme_def, ((struct theme_def){NULL,NULL}))
/**
* Special implementation of getch with a timeout
*/
int _bim_unget = -1;
void bim_unget(int c) {
_bim_unget = c;
}
void redraw_statusbar(void);
int bim_getch_timeout(int timeout) {
fflush(stdout);
if (_bim_unget != -1) {
int out = _bim_unget;
_bim_unget = -1;
return out;
}
struct pollfd fds[1];
fds[0].fd = global_config.tty_in;
fds[0].events = POLLIN;
int ret = poll(fds,1,timeout);
if (ret > 0 && fds[0].revents & POLLIN) {
unsigned char buf[1];
read(global_config.tty_in, buf, 1);
return buf[0];
} else {
background_task_t * task = global_config.background_task;
if (task) {
global_config.background_task = task->next;
task->func(task);
free(task);
if (!global_config.background_task) {
global_config.tail_task = NULL;
redraw_statusbar();
}
}
return -1;
}
}
/**
* UTF-8 parser state
*/
static uint32_t codepoint_r;
static uint32_t state = 0;
#define UTF8_ACCEPT 0
#define UTF8_REJECT 1
static inline uint32_t decode(uint32_t* state, uint32_t* codep, uint32_t byte) {
static int state_table[32] = {
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xxxxxxx */
1,1,1,1,1,1,1,1, /* 10xxxxxx */
2,2,2,2, /* 110xxxxx */
3,3, /* 1110xxxx */
4, /* 11110xxx */
1 /* 11111xxx */
};
static int mask_bytes[32] = {
0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,
0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x1F,0x1F,0x1F,0x1F,
0x0F,0x0F,
0x07,
0x00
};
static int next[5] = {
0,
1,
0,
2,
3
};
if (*state == UTF8_ACCEPT) {
*codep = byte & mask_bytes[byte >> 3];
*state = state_table[byte >> 3];
} else if (*state > 0) {
*codep = (byte & 0x3F) | (*codep << 6);
*state = next[*state];
}
return *state;
}
#define shift_key(i) _shift_key((i), this_buf, &timeout);
int _shift_key(int i, int this_buf[20], int *timeout) {
int thing = this_buf[*timeout-1];
(*timeout) = 0;
switch (thing) {
/* There are other combinations we can handle... */
case '2': return i + 4;
case '5': return i + 8;
case '3': return i + 12;
case '4': return i + 16;
default: return i;
}
}
int bim_getkey(int read_timeout) {
int timeout = 0;
int this_buf[20];
int cin;
uint32_t c;
uint32_t istate = 0;
while ((cin = bim_getch_timeout((timeout == 1) ? 50 : read_timeout))) {
if (cin == -1) {
if (timeout && this_buf[timeout-1] == '\033')
return KEY_ESCAPE;
return KEY_TIMEOUT;
}
if (!decode(&istate, &c, cin)) {
if (timeout == 0) {
switch (c) {
case '\033':
if (timeout == 0) {
this_buf[timeout] = c;
timeout++;
}
continue;
case KEY_LINEFEED: return KEY_ENTER;
case KEY_DELETE: return KEY_BACKSPACE;
}
return c;
} else {
if (timeout >= 1 && this_buf[timeout-1] == '\033' && c == '\033') {
bim_unget(c);
timeout = 0;
return KEY_ESCAPE;
}
if (timeout >= 1 && this_buf[0] == '\033' && c == 'O') {
this_buf[timeout] = c;
timeout++;
continue;
}
if (timeout >= 2 && this_buf[0] == '\033' && this_buf[1] == 'O') {
switch (c) {
case 'P': return KEY_F1;
case 'Q': return KEY_F2;
case 'R': return KEY_F3;
case 'S': return KEY_F4;
}
timeout = 0;
continue;
}
if (timeout >= 1 && this_buf[timeout-1] == '\033' && c != '[') {
timeout = 0;
bim_unget(c);
return KEY_ESCAPE;
}
if (timeout >= 1 && this_buf[timeout-1] == '\033' && c == '[') {
timeout = 1;
this_buf[timeout] = c;
timeout++;
continue;
}
if (timeout >= 2 && this_buf[0] == '\033' && this_buf[1] == '[' &&
(isdigit(c) || (c == ';'))) {
this_buf[timeout] = c;
timeout++;
continue;
}
if (timeout >= 2 && this_buf[0] == '\033' && this_buf[1] == '[') {
switch (c) {
case 'M': return KEY_MOUSE;
case '<': return KEY_MOUSE_SGR;
case 'A': return shift_key(KEY_UP);
case 'B': return shift_key(KEY_DOWN);
case 'C': return shift_key(KEY_RIGHT);
case 'D': return shift_key(KEY_LEFT);
case 'H': return KEY_HOME;
case 'F': return KEY_END;
case 'I': return KEY_PAGE_UP;
case 'G': return KEY_PAGE_DOWN;
case 'Z': return KEY_SHIFT_TAB;
case '~':
if (timeout == 3) {
switch (this_buf[2]) {
case '1': return KEY_HOME;
case '3': return KEY_DELETE;
case '4': return KEY_END;
case '5': return KEY_PAGE_UP;
case '6': return KEY_PAGE_DOWN;
}
} else if (timeout == 5) {
if (this_buf[2] == '2' && this_buf[3] == '0' && this_buf[4] == '0') {
return KEY_PASTE_BEGIN;
} else if (this_buf[2] == '2' && this_buf[3] == '0' && this_buf[4] == '1') {
return KEY_PASTE_END;
}
} else if (this_buf[2] == '1') {
switch (this_buf[3]) {
case '5': return KEY_F5;
case '7': return KEY_F6;
case '8': return KEY_F7;
case '9': return KEY_F8;
}
} else if (this_buf[2] == '2') {
switch (this_buf[3]) {
case '0': return KEY_F9;
case '1': return KEY_F10;
case '3': return KEY_F11;
case '4': return KEY_F12;
}
}
break;
}
}
timeout = 0;
continue;
}
} else if (istate == UTF8_REJECT) {
istate = 0;
}
}
return KEY_TIMEOUT;
}
enum Key key_from_name(char * name) {
for (unsigned int i = 0; i < sizeof(KeyNames)/sizeof(KeyNames[0]); ++i) {
if (!strcmp(KeyNames[i].name, name)) return KeyNames[i].keycode;
}
if (name[0] == '^' && name[1] && !name[2]) {
return name[1] - '@';
}
if (!name[1]) return name[0];
/* Try decoding */
uint32_t c, state = 0;
int candidate = -1;
while (*name) {
if (!decode(&state, &c, (unsigned char)*name)) {
if (candidate == -1) candidate = c;
else return -1; /* Reject `name` if it is multiple codepoints */
} else if (state == UTF8_REJECT) {
return -1;
}
}
return candidate;
}
/**
* Pointer to current active buffer
*/
buffer_t * env = NULL;
buffer_t * left_buffer = NULL;
buffer_t * right_buffer = NULL;
/**
* A buffer for holding a number (line, repetition count)
*/
#define NAV_BUFFER_MAX 10
char nav_buf[NAV_BUFFER_MAX+1];
int nav_buffer = 0;
/**
* Available buffers
*/
int buffers_len = 0;
int buffers_avail = 0;
buffer_t ** buffers = NULL;
/**
* Create a new buffer
*/
buffer_t * buffer_new(void) {
if (buffers_len == buffers_avail) {
/* If we are out of buffer space, expand the buffers vector */
buffers_avail *= 2;
buffers = realloc(buffers, sizeof(buffer_t *) * buffers_avail);
}
/* TODO: Clean up split support and support multiple splits... */
if (left_buffer) {
left_buffer->left = 0;
left_buffer->width = global_config.term_width;
right_buffer->left = 0;
right_buffer->width = global_config.term_width;
left_buffer = NULL;
right_buffer = NULL;
}
/* Allocate a new buffer */
buffers[buffers_len] = malloc(sizeof(buffer_t));
memset(buffers[buffers_len], 0x00, sizeof(buffer_t));
buffers[buffers_len]->left = 0;
buffers[buffers_len]->width = global_config.term_width;
buffers[buffers_len]->highlighting_paren = -1;
buffers[buffers_len]->numbers = global_config.numbers;
buffers[buffers_len]->gutter = 1;
buffers_len++;
global_config.tabs_visible = (!global_config.autohide_tabs) || (buffers_len > 1);
return buffers[buffers_len-1];
}
/**
* Open the biminfo file.
*/
FILE * open_biminfo(void) {
if (!global_config.use_biminfo) return NULL;
char * home = getenv("HOME");
if (!home) {
/* ... but since it's not, we need $HOME, so fail if it isn't set. */
return NULL;
}
/* biminfo lives at ~/.biminfo */
char biminfo_path[PATH_MAX+1] = {0};
sprintf(biminfo_path,"%s/.biminfo",home);
/* Try to open normally first... */
FILE * biminfo = fopen(biminfo_path,"r+");
if (!biminfo) {
/* Otherwise, try to create it. */
biminfo = fopen(biminfo_path,"w+");
}
return biminfo;
}
/**
* Check if a file is open by examining the biminfo file
*/
int file_is_open(char * file_name) {
/* Get the absolute path of the file to normalize for lookup */
char tmp_path[PATH_MAX+2];
if (!realpath(file_name, tmp_path)) {
return 0; /* Assume not */
}
strcat(tmp_path," ");
FILE * biminfo = open_biminfo();
if (!biminfo) return 0; /* Assume not */
/* Scan */
char line[PATH_MAX+64];
while (!feof(biminfo)) {
fpos_t start_of_line;
fgetpos(biminfo, &start_of_line);
fgets(line, PATH_MAX+63, biminfo);
if (line[0] != '%') {
continue;
}
if (!strncmp(&line[1],tmp_path, strlen(tmp_path))) {
/* File is currently open */
int pid = -1;
sscanf(line+1+strlen(tmp_path)+1,"%d",&pid);
if (pid != -1 && pid != getpid()) {
if (!kill(pid, 0)) {
int key = 0;
render_error("biminfo indicates another instance may already be editing this file");
render_commandline_message("\n");
render_commandline_message("file path = %s\n", tmp_path);
render_commandline_message("pid = %d (still running)\n", pid);
render_commandline_message("Open file anyway? (y/N)");
while ((key = bim_getkey(DEFAULT_KEY_WAIT)) == KEY_TIMEOUT);
if (key != 'y') {
fclose(biminfo);
return 1;
}
}
}
fclose(biminfo);
return 0;
}
}
fclose(biminfo);
return 0;
}
/**
* Fetch the cursor position from a biminfo file
*/
int fetch_from_biminfo(buffer_t * buf) {
/* Can't fetch if we don't have a filename */
if (!buf->file_name) return 1;
/* Get the absolute path of the file to normalize for lookup */
char tmp_path[PATH_MAX+2];
if (!realpath(buf->file_name, tmp_path)) {
return 1;
}
strcat(tmp_path," ");
FILE * biminfo = open_biminfo();
if (!biminfo) return 1;
/* Scan */
char line[PATH_MAX+64];
while (!feof(biminfo)) {
fpos_t start_of_line;
fgetpos(biminfo, &start_of_line);
fgets(line, PATH_MAX+63, biminfo);
if (line[0] != '>') {
continue;
}
if (!strncmp(&line[1],tmp_path, strlen(tmp_path))) {
/* Read */
sscanf(line+1+strlen(tmp_path)+1,"%d",&buf->line_no);
sscanf(line+1+strlen(tmp_path)+21,"%d",&buf->col_no);
if (buf->line_no > buf->line_count) buf->line_no = buf->line_count;
if (buf->col_no > buf->lines[buf->line_no-1]->actual) buf->col_no = buf->lines[buf->line_no-1]->actual;
try_to_center();
fclose(biminfo);
return 0;
}
}
fclose(biminfo);
return 0;
}
/**
* Write a file containing the last cursor position of a buffer.
*/
int update_biminfo(buffer_t * buf, int is_open) {
if (!buf->file_name) return 1;
/* Get the absolute path of the file to normalize for lookup */
char tmp_path[PATH_MAX+1];
if (!realpath(buf->file_name, tmp_path)) {
return 1;
}
strcat(tmp_path," ");
FILE * biminfo = open_biminfo();
if (!biminfo) return 1;
/* Scan */
char line[PATH_MAX+64];
while (!feof(biminfo)) {
fpos_t start_of_line;
fgetpos(biminfo, &start_of_line);
fgets(line, PATH_MAX+63, biminfo);
if (line[0] != '>' && line[0] != '%') {
continue;
}
if (!strncmp(&line[1],tmp_path, strlen(tmp_path))) {
/* Update */
fsetpos(biminfo, &start_of_line);
fprintf(biminfo,"%c%s %20d %20d\n", is_open ? '%' : '>', tmp_path,
is_open ? getpid() : buf->line_no, buf->col_no);
goto _done;
}
}
if (ftell(biminfo) == 0) {
/* New biminfo */
fprintf(biminfo, "# This is a biminfo file.\n");
fprintf(biminfo, "# It was generated by bim. Do not edit it by hand!\n");
fprintf(biminfo, "# Cursor positions and other state are stored here.\n");
}
/* If we reach this point, we didn't find a record for this file
* and the write cursor should be at the end, so just add a new line */
fprintf(biminfo,"%c%s %20d %20d\n", is_open ? '%' : '>', tmp_path,
is_open ? getpid() : buf->line_no, buf->col_no);
_done:
fclose(biminfo);
return 0;
}
void cancel_background_tasks(buffer_t * buf) {
background_task_t * t = global_config.background_task;
background_task_t * last = NULL;
while (t) {
if (t->env == buf) {
if (last) {
last->next = t->next;
} else {
global_config.background_task = t->next;
}
if (!t->next) {
global_config.tail_task = last;
}
background_task_t * tmp = t->next;
free(t);
t = tmp;
} else {
last = t;
t = t->next;
}
}
}
/**
* Close a buffer
*/
buffer_t * buffer_close(buffer_t * buf) {
int i;
/* Locate the buffer in the buffer list */
for (i = 0; i < buffers_len; i++) {
if (buf == buffers[i])
break;
}
/* This buffer doesn't exist? */
if (i == buffers_len) {
return NULL;
}
/* Cancel any background tasks for this env */
cancel_background_tasks(buf);
update_biminfo(buf, 0);
/* Clean up lines used by old buffer */
for (int i = 0; i < buf->line_count; ++i) {
free(buf->lines[i]);
}
free(buf->lines);
if (buf->file_name) {
free(buf->file_name);
}
history_t * h = buf->history;
while (h->next) {
h = h->next;
}
while (h) {
history_t * x = h->previous;
free(h);
h = x;
}
/* Clean up the old buffer */
free(buf);
/* Remove the buffer from the vector, moving others up */
if (i != buffers_len - 1) {
memmove(&buffers[i], &buffers[i+1], sizeof(*buffers) * (buffers_len - i - 1));
}
/* There is one less buffer */
buffers_len--;
if (buffers_len && global_config.tab_offset >= buffers_len) global_config.tab_offset--;
global_config.tabs_visible = (!global_config.autohide_tabs) || (buffers_len > 1);
if (!buffers_len) {
/* There are no more buffers. */
return NULL;
}
/* If this was the last buffer in the list, return the previous last buffer */
if (i == buffers_len) {
return buffers[buffers_len-1];
}
/* Otherwise return the buffer in the same location */
return buffers[i];
}
/**
* Convert syntax highlighting flag to color code
*/
const char * flag_to_color(int _flag) {
int flag = _flag & FLAG_MASK_COLORS;
switch (flag) {
case FLAG_KEYWORD:
return COLOR_KEYWORD;
case FLAG_STRING:
return COLOR_STRING;
case FLAG_COMMENT:
return COLOR_COMMENT;
case FLAG_TYPE:
return COLOR_TYPE;
case FLAG_NUMERAL:
return COLOR_NUMERAL;
case FLAG_PRAGMA:
return COLOR_PRAGMA;
case FLAG_DIFFPLUS:
return COLOR_GREEN;
case FLAG_DIFFMINUS:
return COLOR_RED;
case FLAG_SELECT:
return COLOR_FG;
case FLAG_BOLD:
return COLOR_BOLD;
case FLAG_LINK_COLOR:
return COLOR_LINK;
case FLAG_ESCAPE:
return COLOR_ESCAPE;
default:
return COLOR_FG;
}
}
/**
* Match and paint a single keyword. Returns 1 if the keyword was matched and 0 otherwise,
* so it can be used for prefix checking for things that need further special handling.
*/
int match_and_paint(struct syntax_state * state, const char * keyword, int flag, int (*keyword_qualifier)(int c)) {
if (keyword_qualifier(lastchar())) return 0;
if (!keyword_qualifier(charat())) return 0;
int i = state->i;
int slen = 0;
while (i < state->line->actual || *keyword == '\0') {
if (*keyword == '\0' && (i >= state->line->actual || !keyword_qualifier(state->line->text[i].codepoint))) {
for (int j = 0; j < slen; ++j) {
paint(1, flag);
}
return 1;
}
if (*keyword != state->line->text[i].codepoint) return 0;
i++;
keyword++;
slen++;
}
return 0;
}
/**
* This is a basic character matcher for "keyword" characters.
*/
int simple_keyword_qualifier(int c) {
return isalnum(c) || (c == '_');
}
/**
* These words can appear in comments and should be highlighted.
* Since there are a lot of comment highlighters, this is provided
* as a common function that can be used by multiple highlighters.
*/
int common_comment_buzzwords(struct syntax_state * state) {
if (match_and_paint(state, "TODO", FLAG_NOTICE, simple_keyword_qualifier)) { return 1; }
else if (match_and_paint(state, "XXX", FLAG_NOTICE, simple_keyword_qualifier)) { return 1; }
else if (match_and_paint(state, "FIXME", FLAG_ERROR, simple_keyword_qualifier)) { return 1; }
return 0;
}
/**
* Paint a comment until end of line; assumes this comment can not continue.
* (Some languages have comments that can continue with a \ - don't use this!)
* Assumes you've already painted your comment start characters.
*/
int paint_comment(struct syntax_state * state) {
while (charat() != -1) {
if (common_comment_buzzwords(state)) continue;
else { paint(1, FLAG_COMMENT); }
}
return -1;
}
/**
* Find and return a highlighter by name, or return NULL if none was found.
*/
struct syntax_definition * find_syntax_calculator(const char * name) {
for (struct syntax_definition * s = syntaxes; syntaxes && s->name; ++s) {
if (!strcmp(s->name, name)) {
return s;
}
}
return NULL;
}
int syntax_count = 0;
int syntax_space = 0;
struct syntax_definition * syntaxes = NULL;
void add_syntax(struct syntax_definition def) {
/* See if a name match already exists for this def. */
for (struct syntax_definition * s = syntaxes; syntaxes && s->name; ++s) {
if (!strcmp(def.name,s->name)) {
*s = def;
return;
}
}
if (syntax_space == 0) {
syntax_space = 4;
syntaxes = calloc(sizeof(struct syntax_definition), syntax_space);
} else if (syntax_count +1 == syntax_space) {
syntax_space *= 2;
syntaxes = realloc(syntaxes, sizeof(struct syntax_definition) * syntax_space);
for (int i = syntax_count; i < syntax_space; ++i) syntaxes[i].name = NULL;
}
syntaxes[syntax_count] = def;
syntax_count++;
}
void redraw_all(void);
/**
* Calculate syntax highlighting for the given line, and lines after
* if their initial syntax state has changed by this recalculation.
*
* If `line_no` is -1, this line is taken to be a special line and not
* part of a buffer; search highlighting will not be processed and syntax
* highlighting will halt after the line is finished.
*
* If `env->slowop` is currently enabled, recalculation is skipped.
*/
void recalculate_syntax(line_t * line, int line_no) {
if (env->slowop) return;
/* Clear syntax for this line first */
int is_original = 1;
while (1) {
for (int i = 0; i < line->actual; ++i) {
line->text[i].flags = line->text[i].flags & (3 << 5);
}
if (!env->syntax) {
if (line_no != -1) rehighlight_search(line);
return;
}
/* Start from the line's stored in initial state */
struct SyntaxState * s = (void*)krk_newInstance(env->syntax->krkClass);
s->state.env = env;
s->state.line = line;
s->state.line_no = line_no;
s->state.state = line->istate;
s->state.i = 0;
while (1) {
ptrdiff_t before = krk_currentThread.stackTop - krk_currentThread.stack;
krk_push(OBJECT_VAL(env->syntax->krkFunc));
krk_push(OBJECT_VAL(s));
KrkValue result = krk_callStack(1);
krk_currentThread.stackTop = krk_currentThread.stack + before;
if (IS_NONE(result) && (krk_currentThread.flags & KRK_THREAD_HAS_EXCEPTION)) {
render_error("Exception occurred in plugin: %s", AS_INSTANCE(krk_currentThread.currentException)->_class->name->chars);
render_commandline_message("\n");
krk_dumpTraceback();
goto _syntaxError;
} else if (!IS_NONE(result) && !IS_INTEGER(result)) {
render_error("Instead of an integer, got %s", krk_typeName(result));
render_commandline_message("\n");
goto _syntaxError;
}
s->state.state = IS_NONE(result) ? -1 : AS_INTEGER(result);
if (s->state.state != 0) {
if (line_no == -1) return;
rehighlight_search(line);
if (!is_original) {
redraw_line(line_no);
}
if (line_no + 1 < env->line_count && env->lines[line_no+1]->istate != s->state.state) {
line_no++;
line = env->lines[line_no];
line->istate = s->state.state;
if (env->loading) return;
is_original = 0;
goto _next;
}
return;
}
}
_next:
(void)0;
}
_syntaxError:
krk_resetStack();
fprintf(stderr,"This syntax highlighter will be disabled in this environment.");
env->syntax = NULL;
cancel_background_tasks(env);
pause_for_key();
redraw_all();
}
/**
* Recalculate tab widths.
*/
void recalculate_tabs(line_t * line) {
if (env->loading) return;
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;
}
}
/**
* The next section contains the basic editing primitives. All other
* actions are built out of these primitives, and they are the basic
* instructions that get stored in history to be undone (or redone).
*
* Primitives may recalculate syntax or redraw lines, if needed, but only
* when conditions for redrawing are met (such as not being in `slowop`,
* or loading the file; also replaying history, or when loading files).
*
* At the moment, primitives and most other functions do not take the current
* buffer (environment) as an argument and instead rely on a global variable;
* this should definitely be fixed at some point...
*/
/**
* When a new action that produces history happens and there is forward
* history that can be redone, we need to erase it as our tree has branched.
* If we wanted, we could actually story things in a tree structure so that
* the new branch and the old branch can both stick around, and that should
* probably be explored in the future...
*/
void history_free(history_t * root) {
if (!root->next) return;
/* Find the last entry so we can free backwards */
history_t * n = root->next;
while (n->next) {
n = n->next;
}
/* Free everything after the root, including stored content. */
while (n != root) {
history_t * p = n->previous;
switch (n->type) {
case HISTORY_REPLACE_LINE:
free(n->contents.remove_replace_line.contents);
/* fall-through */
case HISTORY_REMOVE_LINE:
free(n->contents.remove_replace_line.old_contents);
break;
default:
/* Nothing extra to free */
break;
}
free(n);
n = p;
}
root->next = NULL;
}
/**
* This macro is called by primitives to insert history elements for each
* primitive action when performing in edit modes.
*/
#define HIST_APPEND(e) do { \
e->col = env->col_no; \
e->line = env->line_no; \
if (env->history) { \
e->previous = env->history; \
history_free(env->history); \
env->history->next = e; \
e->next = NULL; \
} \
env->history = e; \
} while (0)
/**
* Mark a point where a complete set of actions has ended.
* Individual history entries include things like "insert one character"
* but a user action that should be undone is "insert several characters";
* breaks should be inserted after a series of primitives when there is
* a clear "end", such as when switching out of insert mode after typing.
*/
void set_history_break(void) {
if (!global_config.history_enabled) return;
/* Do not produce duplicate breaks, or add breaks if we are at a sentinel. */
if (env->history->type != HISTORY_BREAK && env->history->type != HISTORY_SENTINEL) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_BREAK;
HIST_APPEND(e);
}
}
/**
* (Primitive) Insert a character into an existing line.
*
* This is the most basic primitive action: Take a line, and insert a codepoint
* into it at a given offset. If `lineno` is not -1, the line is assumed to
* be part of the active buffer. If inserting a character means the line needs
* to grow, then it will be reallocated, so the return value of the new line
* must ALWAYS be used. This primitive will NOT automatically update the
* buffer with the new pointer, so if you are calling insert on a buffer you
* MUST update env->lines[lineno-1] yourself.
*/
__attribute__((warn_unused_result)) line_t * line_insert(line_t * line, char_t c, int offset, int lineno) {
if (!env->loading && global_config.history_enabled && lineno != -1) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_INSERT;
e->contents.insert_delete_replace.lineno = lineno;
e->contents.insert_delete_replace.offset = offset;
e->contents.insert_delete_replace.codepoint = c.codepoint;
HIST_APPEND(e);
}
/* If there is not enough space... */
if (line->actual == line->available) {
/* Expand the line buffer */
if (line->available == 0) {
line->available = 8;
} else {
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;
if (!env->loading) {
line->rev_status = 2; /* Modified */
recalculate_tabs(line);
recalculate_syntax(line, lineno);
}
return line;
}
/**
* (Primitive) Delete a character from a line.
*
* Remove the character at the given offset. We never shrink lines, so this
* does not have a return value, and delete should never be called during
* a loading operation (though it may be called during a history replay).
*/
void line_delete(line_t * line, int offset, int lineno) {
/* Can't delete character before start of line. */
if (offset == 0) return;
/* Can't delete past end of line either */
if (offset > line->actual) return;
if (!env->loading && global_config.history_enabled && lineno != -1) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_DELETE;
e->contents.insert_delete_replace.lineno = lineno;
e->contents.insert_delete_replace.offset = offset;
e->contents.insert_delete_replace.old_codepoint = line->text[offset-1].codepoint;
HIST_APPEND(e);
}
/* 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;
line->rev_status = 2;
recalculate_tabs(line);
recalculate_syntax(line, lineno);
}
/**
* (Primitive) Replace a character in a line.
*
* Replaces the codepoint at the given offset with a new character. Since this
* does not involve any size changes, it does not have a return value.
* Since a replacement character may be a tab, we do still need to recalculate
* character widths for tabs as they may change.
*/
void line_replace(line_t * line, char_t _c, int offset, int lineno) {
if (!env->loading && global_config.history_enabled && lineno != -1) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_REPLACE;
e->contents.insert_delete_replace.lineno = lineno;
e->contents.insert_delete_replace.offset = offset;
e->contents.insert_delete_replace.codepoint = _c.codepoint;
e->contents.insert_delete_replace.old_codepoint = line->text[offset].codepoint;
HIST_APPEND(e);
}
line->text[offset] = _c;
if (!env->loading) {
line->rev_status = 2; /* Modified */
recalculate_tabs(line);
recalculate_syntax(line, lineno);
}
}
/**
* (Primitive) Remove a line from the active buffer
*
* This primitive is only valid for a buffer. Delete a line, or if this is the
* only line in the buffer, clear it but keep the line around with no
* characters. We use the `line_delete` primitive to clear that line,
* otherwise we are our own primitive and produce history entries.
*
* While we do not shrink the `lines` array, it is returned here anyway.
*/
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) {
while (lines[offset]->actual > 0) {
line_delete(lines[offset], lines[offset]->actual, offset);
}
return lines;
}
/* When a line is removed, we need to keep its contents so we
* can un-remove it on redo... */
if (!env->loading && global_config.history_enabled) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_REMOVE_LINE;
e->contents.remove_replace_line.lineno = offset;
e->contents.remove_replace_line.old_contents = malloc(sizeof(line_t) + sizeof(char_t) * lines[offset]->available);
memcpy(e->contents.remove_replace_line.old_contents, lines[offset], sizeof(line_t) + sizeof(char_t) * lines[offset]->available);
HIST_APPEND(e);
}
/* Otherwise, free the data used by the line */
free(lines[offset]);
/* Move other lines up */
if (offset < env->line_count-1) {
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;
}
/**
* (Primitive) Add a new line to the active buffer.
*
* Inserts a new line into a buffer at the given line offset.
* Since this grows the buffer, it will return the new line array
* after reallocation if needed.
*/
line_t ** add_line(line_t ** lines, int offset) {
/* Invalid offset? */
if (offset > env->line_count) return lines;
if (!env->loading && global_config.history_enabled) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_ADD_LINE;
e->contents.add_merge_split_lines.lineno = offset;
HIST_APPEND(e);
}
/* 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] = calloc(sizeof(line_t) + sizeof(char_t) * 32, 1);
lines[offset]->available = 32;
/* There is one new line */
env->line_count += 1;
env->lines = lines;
if (!env->loading) {
lines[offset]->rev_status = 2; /* Modified */
}
if (offset > 0 && !env->loading) {
recalculate_syntax(lines[offset-1],offset-1);
}
return lines;
}
/**
* (Primitive) Replace a line with data from another line.
*
* This is only called when pasting yanks after calling `add_line`,
* but it allows us to have simpler history for that action.
*/
void replace_line(line_t ** lines, int offset, line_t * replacement) {
if (!env->loading && global_config.history_enabled) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_REPLACE_LINE;
e->contents.remove_replace_line.lineno = offset;
e->contents.remove_replace_line.old_contents = malloc(sizeof(line_t) + sizeof(char_t) * lines[offset]->available);
memcpy(e->contents.remove_replace_line.old_contents, lines[offset], sizeof(line_t) + sizeof(char_t) * lines[offset]->available);
e->contents.remove_replace_line.contents = malloc(sizeof(line_t) + sizeof(char_t) * replacement->available);
memcpy(e->contents.remove_replace_line.contents, replacement, sizeof(line_t) + sizeof(char_t) * replacement->available);
HIST_APPEND(e);
}
if (lines[offset]->available < replacement->actual) {
lines[offset] = realloc(lines[offset], sizeof(line_t) + sizeof(char_t) * replacement->available);
lines[offset]->available = replacement->available;
}
lines[offset]->actual = replacement->actual;
memcpy(&lines[offset]->text, &replacement->text, sizeof(char_t) * replacement->actual);
if (!env->loading) {
lines[offset]->rev_status = 2;
recalculate_syntax(lines[offset],offset);
}
}
/**
* (Primitive) Merge two consecutive lines.
*
* Take two lines in a buffer and turn them into one line.
* `lineb` is the offset of the second line... or the
* line number of the first line, depending on which indexing
* system you prefer to think about. This won't grow `lines`,
* but it will likely modify it and can reallocate individual
* lines as well.
*/
line_t ** merge_lines(line_t ** lines, int lineb) {
/* linea is the line immediately before lineb */
int linea = lineb - 1;
if (!env->loading && global_config.history_enabled) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_MERGE_LINES;
e->contents.add_merge_split_lines.lineno = lineb;
e->contents.add_merge_split_lines.split = env->lines[linea]->actual;
HIST_APPEND(e);
}
/* If there isn't enough space in linea hold both... */
if (lines[linea]->available < lines[linea]->actual + lines[lineb]->actual) {
while (lines[linea]->available < lines[linea]->actual + lines[lineb]->actual) {
/* ... allocate more space until it fits */
if (lines[linea]->available == 0) {
lines[linea]->available = 8;
} else {
lines[linea]->available *= 2;
}
}
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;
if (!env->loading) {
lines[linea]->rev_status = 2;
recalculate_tabs(lines[linea]);
recalculate_syntax(lines[linea], linea);
}
/* Remove the second line */
free(lines[lineb]);
/* Move other lines up */
if (lineb < env->line_count) {
memmove(&lines[lineb], &lines[lineb+1], sizeof(line_t *) * (env->line_count - (lineb - 1)));
lines[env->line_count-1] = NULL;
}
/* There is one less line */
env->line_count -= 1;
return lines;
}
/**
* (Primitive) Split a line into two lines at the given column.
*
* Takes one line and makes it two lines. There are some optimizations
* if you are trying to "split" at the first or last column, which
* are both just treated as add_line.
*/
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);
}
if (!env->loading && global_config.history_enabled) {
history_t * e = malloc(sizeof(history_t));
e->type = HISTORY_SPLIT_LINE;
e->contents.add_merge_split_lines.lineno = line;
e->contents.add_merge_split_lines.split = split;
HIST_APPEND(e);
}
if (!env->loading) {
unhighlight_matching_paren();
}
/* 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+2], &lines[line+1], sizeof(line_t *) * (env->line_count - line));
}
int remaining = lines[line]->actual - split;
/* This is some wacky math to get a good power-of-two */
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+1] = calloc(sizeof(line_t) + sizeof(char_t) * v, 1);
lines[line+1]->available = v;
lines[line+1]->actual = remaining;
/* Move the data from the old line into the new line */
memmove(lines[line+1]->text, &lines[line]->text[split], sizeof(char_t) * remaining);
lines[line]->actual = split;
if (!env->loading) {
lines[line]->rev_status = 2;
lines[line+1]->rev_status = 2;
recalculate_tabs(lines[line]);
recalculate_tabs(lines[line+1]);
recalculate_syntax(lines[line], line);
recalculate_syntax(lines[line+1], line+1);
}
/* There is one new line */
env->line_count += 1;
/* We may have reallocated lines */
return lines;
}
/**
* Primitives end here. Everything after this point that wants to
* perform modifications must be built on these primitives and
* should never directly modify env->lines or the contents thereof,
* outside of syntax highlighting flag changes.
*/
/**
* The following section is where we implement "smart" automatic
* indentation. A lot of this is hacked-together nonsense and "smart"
* is a bit of an overstatement.
*/
/**
* Understand spaces and comments and check if the previous line
* ended with a brace or a colon.
*/
int line_ends_with_brace(line_t * line) {
int i = line->actual-1;
while (i >= 0) {
if ((line->text[i].flags & 0x1F) == FLAG_COMMENT || line->text[i].codepoint == ' ') {
i--;
} else {
break;
}
}
if (i < 0) return 0;
return (line->text[i].codepoint == '{' || line->text[i].codepoint == ':') ? i+1 : 0;
}
/**
* Determine if a given line is a comment by checking its initial
* syntax highlighting state value. This is used by automatic indentation
* to continue block comments in languages like C.
*
* TODO: Why isn't this a syntax-> method?
*/
int line_is_comment(line_t * line) {
if (!env->syntax) return 0;
if (!strcmp(env->syntax->name,"c")) {
if (line->istate == 1) return 1;
} else if (!strcmp(env->syntax->name,"java")) {
if (line->istate == 1) return 1;
} else if (!strcmp(env->syntax->name,"kotlin")) {
if (line->istate == 1) return 1;
} else if (!strcmp(env->syntax->name,"rust")) {
if (line->istate > 0) return 1;
}
return 0;
}
/**
* Figure out where the indentation for a brace belongs by finding
* where the start of the line is after whitespace. This is called
* by default when we insert } and tries to align it with the indentation
* of the matching opening {.
*/
int find_brace_line_start(int line, int col) {
int ncol = col - 1;
while (ncol > 0) {
if (env->lines[line-1]->text[ncol-1].codepoint == ')') {
int t_line_no = env->line_no;
int t_col_no = env->col_no;
env->line_no = line;
env->col_no = ncol;
int paren_match_line = -1, paren_match_col = -1;
find_matching_paren(&paren_match_line, &paren_match_col, 1);
if (paren_match_line != -1) {
line = paren_match_line;
}
env->line_no = t_line_no;
env->col_no = t_col_no;
break;
} else if (env->lines[line-1]->text[ncol-1].codepoint == ' ') {
ncol--;
} else {
break;
}
}
return line;
}
/**
* Add indentation from the previous (temporally) line.
*
* By "temporally", we mean not necessarily the line above, but
* potentially the line below if we are inserting a line above
* the cursor.
*/
void add_indent(int new_line, int old_line, int ignore_brace) {
if (env->indent) {
int changed = 0;
if (old_line < new_line && line_is_comment(env->lines[new_line])) {
for (int i = 0; i < env->lines[old_line]->actual; ++i) {
if (env->lines[old_line]->text[i].codepoint == '/') {
if (env->lines[old_line]->text[i+1].codepoint == '*') {
/* Insert ' * ' */
char_t space = {1,FLAG_COMMENT,' '};
char_t asterisk = {1,FLAG_COMMENT,'*'};
env->lines[new_line] = line_insert(env->lines[new_line],space,i,new_line);
env->lines[new_line] = line_insert(env->lines[new_line],asterisk,i+1,new_line);
env->lines[new_line] = line_insert(env->lines[new_line],space,i+2,new_line);
env->col_no += 3;
}
break;
} else if (env->lines[old_line]->text[i].codepoint == ' ' && env->lines[old_line]->text[i+1].codepoint == '*') {
/* Insert ' * ' */
char_t space = {1,FLAG_COMMENT,' '};
char_t asterisk = {1,FLAG_COMMENT,'*'};
env->lines[new_line] = line_insert(env->lines[new_line],space,i,new_line);
env->lines[new_line] = line_insert(env->lines[new_line],asterisk,i+1,new_line);
env->lines[new_line] = line_insert(env->lines[new_line],space,i+2,new_line);
env->col_no += 3;
break;
} else if (env->lines[old_line]->text[i].codepoint == ' ' ||
env->lines[old_line]->text[i].codepoint == '\t' ||
env->lines[old_line]->text[i].codepoint == '*') {
env->lines[new_line] = line_insert(env->lines[new_line],env->lines[old_line]->text[i],i,new_line);
env->col_no++;
changed = 1;
} else {
break;
}
}
} else {
int line_to_copy_from = old_line;
int col;
if (old_line < new_line &&
!ignore_brace &&
(col = line_ends_with_brace(env->lines[old_line])) &&
env->lines[old_line]->text[col-1].codepoint == '{') {
line_to_copy_from = find_brace_line_start(old_line+1, col)-1;
}
for (int i = 0; i < env->lines[line_to_copy_from]->actual; ++i) {
if (line_to_copy_from < new_line && i == env->lines[line_to_copy_from]->actual - 3 &&
env->lines[line_to_copy_from]->text[i].codepoint == ' ' &&
env->lines[line_to_copy_from]->text[i+1].codepoint == '*' &&
env->lines[line_to_copy_from]->text[i+2].codepoint == '/') {
break;
} else if (env->lines[line_to_copy_from]->text[i].codepoint == ' ' ||
env->lines[line_to_copy_from]->text[i].codepoint == '\t') {
env->lines[new_line] = line_insert(env->lines[new_line],env->lines[line_to_copy_from]->text[i],i,new_line);
env->col_no++;
changed = 1;
} else {
break;
}
}
}
if (old_line < new_line && !ignore_brace && line_ends_with_brace(env->lines[old_line])) {
if (env->tabs) {
char_t c = {0};
c.codepoint = '\t';
c.display_width = env->tabstop;
env->lines[new_line] = line_insert(env->lines[new_line], c, env->col_no-1, new_line);
env->col_no++;
changed = 1;
} else {
for (int j = 0; j < env->tabstop; ++j) {
char_t c = {0};
c.codepoint = ' ';
c.display_width = 1;
env->lines[new_line] = line_insert(env->lines[new_line], c, env->col_no-1, new_line);
env->col_no++;
}
changed = 1;
}
}
int was_whitespace = 1;
for (int i = 0; i < env->lines[old_line]->actual; ++i) {
if (env->lines[old_line]->text[i].codepoint != ' ' &&
env->lines[old_line]->text[i].codepoint != '\t') {
was_whitespace = 0;
break;
}
}
if (was_whitespace) {
while (env->lines[old_line]->actual) {
line_delete(env->lines[old_line], env->lines[old_line]->actual, old_line);
}
}
if (changed) {
recalculate_syntax(env->lines[new_line],new_line);
}
}
}
/**
* Initialize a buffer with default values.
*
* Should be called after creating a buffer.
*/
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->readonly = 0;
env->offset = 0;
env->line_avail = 8; /* Default line buffer capacity */
env->tabs = 1; /* Tabs by default */
env->tabstop = 4; /* Tab stop width */
env->indent = 1; /* Auto-indent by default */
env->history = malloc(sizeof(struct history));
memset(env->history, 0, sizeof(struct history));
env->last_save_history = env->history;
/* Allocate line buffer */
env->lines = malloc(sizeof(line_t *) * env->line_avail);
/* Initialize the first line */
env->lines[0] = calloc(sizeof(line_t) + sizeof(char_t) * 32, 1);
env->lines[0]->available = 32;
}
/**
* Toggle buffered / unbuffered modes
*/
struct termios old;
void get_initial_termios(void) {
tcgetattr(STDOUT_FILENO, &old);
}
void set_unbuffered(void) {
struct termios new = old;
new.c_iflag &= (~ICRNL) & (~IXON);
new.c_lflag &= (~ICANON) & (~ECHO) & (~ISIG);
#ifdef VLNEXT
new.c_cc[VLNEXT] = 0;
#endif
tcsetattr(STDOUT_FILENO, TCSAFLUSH, &new);
}
void set_buffered(void) {
tcsetattr(STDOUT_FILENO, 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;
}
if (codepoint == 0x7F) {
/* Renders as ^? */
return 2;
}
if (codepoint > 0x7f && codepoint < 0xa0) {
/* Upper control bytes <xx> */
return 4;
}
if (codepoint == 0xa0) {
/* Non-breaking space _ */
return 1;
}
/* Skip wcwidth for anything under 256 */
if (codepoint > 127) {
if (global_config.can_unicode) {
/* Higher codepoints may be wider (eg. Japanese) */
int out = wcwidth(codepoint);
if (out >= 1) return out;
}
/* Invalid character, render as [U+ABCD] or [U+ABCDEF] */
return (codepoint < 0x10000) ? 8 : 10;
}
return 1;
}
/**
* The following section contains methods for crafting terminal escapes
* for rendering the display. We do not use curses or any similar
* library, so we have to generate these sequences ourself based on
* some assumptions about the target terminal.
*/
/**
* Move the terminal cursor
*/
void place_cursor(int x, int y) {
printf("\033[%d;%dH", y, x);
}
/**
* Given two color codes from a theme, convert them to an escape
* sequence to set the foreground and background color. This allows
* us to support basic 16, xterm 256, and true color in themes.
*/
char * color_string(const char * fg, const char * bg) {
static char output[100];
char * t = output;
t += sprintf(t,"\033[22;23;");
if (*bg == '@') {
int _bg = atoi(bg+1);
if (_bg < 10) {
t += sprintf(t, "4%d;", _bg);
} else {
t += sprintf(t, "10%d;", _bg-10);
}
} else {
t += sprintf(t, "48;%s;", bg);
}
if (*fg == '@') {
int _fg = atoi(fg+1);
if (_fg < 10) {
t += sprintf(t, "3%dm", _fg);
} else {
t += sprintf(t, "9%dm", _fg-10);
}
} else {
t += sprintf(t, "38;%sm", fg);
}
return output;
}
/**
* Set text colors
*
* Normally, text colors are just strings, but if they
* start with @ they will be parsed as integers
* representing one of the 16 standard colors, suitable
* for terminals without support for the 256- or 24-bit
* color modes.
*/
void set_colors(const char * fg, const char * bg) {
printf("%s", color_string(fg, bg));
}
/**
* Set just the foreground color
*
* (See set_colors above)
*/
void set_fg_color(const char * fg) {
printf("\033[22;23;");
if (*fg == '@') {
int _fg = atoi(fg+1);
if (_fg < 10) {
printf("3%dm", _fg);
} else {
printf("9%dm", _fg-10);
}
} else {
printf("38;%sm", fg);
}
}
/**
* Clear the rest of this line
*/
void clear_to_end(void) {
if (global_config.can_bce) {
printf("\033[K");
}
}
/**
* For terminals without bce, prepaint the whole line, so we don't have to track
* where the cursor is for everything. Inefficient, but effective.
*/
void paint_line(const char * bg) {
if (!global_config.can_bce) {
set_colors(COLOR_FG, bg);
for (int i = 0; i < global_config.term_width; ++i) {
printf(" ");
}
printf("\r");
}
}
/**
* Enable bold text display
*/
void set_bold(void) {
printf("\033[1m");
}
/**
* Disable bold
*/
void unset_bold(void) {
printf("\033[22m");
}
/**
* Enable underlined text display
*/
void set_underline(void) {
printf("\033[4m");
}
/**
* Disable underlined text display
*/
void unset_underline(void) {
printf("\033[24m");
}
/**
* Reset text display attributes
*/
void reset(void) {
printf("\033[0m");
}
/**
* Clear the entire screen
*/
void clear_screen(void) {
printf("\033[H\033[2J");
}
/**
* Hide the cursor
*/
void hide_cursor(void) {
if (global_config.can_hideshow) {
printf("\033[?25l");
}
}
/**
* Show the cursor
*/
void show_cursor(void) {
if (global_config.can_hideshow) {
printf("\033[?25h");
}
}
/**
* Store the cursor position
*/
void store_cursor(void) {
printf("\0337");
}
/**
* Restore the cursor position.
*/
void restore_cursor(void) {
printf("\0338");
}
/**
* Request mouse events
*/
void mouse_enable(void) {
if (global_config.can_mouse) {
printf("\033[?1000h");
if (global_config.can_sgrmouse) {
printf("\033[?1006h");
}
}
}
/**
* Stop mouse events
*/
void mouse_disable(void) {
if (global_config.can_mouse) {
if (global_config.can_sgrmouse) {
printf("\033[?1006l");
}
printf("\033[?1000l");
}
}
/**
* Shift the screen up one line
*/
void shift_up(int amount) {
printf("\033[%dS", amount);
}
/**
* Shift the screen down one line.
*/
void shift_down(int amount) {
printf("\033[%dT", amount);
}
void insert_lines_at(int line, int count) {
place_cursor(1, line);
printf("\033[%dL", count);
}
void delete_lines_at(int line, int count) {
place_cursor(1, line);
printf("\033[%dM", count);
}
/**
* Switch to the alternate terminal screen.
*/
void set_alternate_screen(void) {
if (global_config.can_altscreen) {
printf("\033[?1049h");
}
}
/**
* Restore the standard terminal screen.
*/
void unset_alternate_screen(void) {
if (global_config.can_altscreen) {
printf("\033[?1049l");
}
}
/**
* Enable bracketed paste mode.
*/
void set_bracketed_paste(void) {
if (global_config.can_bracketedpaste) {
printf("\033[?2004h");
}
}
/**
* Disable bracketed paste mode.
*/
void unset_bracketed_paste(void) {
if (global_config.can_bracketedpaste) {
printf("\033[?2004l");
}
}
/**
* Get the name of just a file from a full path.
* Returns a pointer within the original string.
*
* Called in a few different places where the name of a file
* is needed from its full path, such as drawing tab names or
* building HTML files.
*/
char * file_basename(char * file) {
char * c = strrchr(file, '/');
if (!c) return file;
return (c+1);
}
/**
* Print a tab name with fixed width and modifiers
* into an output buffer and return the written width.
*/
int draw_tab_name(buffer_t * _env, char * out, int max_width, int * width) {
uint32_t c, state = 0;
char * t = _env->file_name ? file_basename(_env->file_name) : "[No Name]";
#define ADD(c) do { \
*o = c; \
o++; \
*o = '\0'; \
bytes++; \
} while (0)
char * o = out;
*o = '\0';
int bytes = 0;
if (max_width < 2) return 1;
ADD(' ');
(*width)++;
if (_env->modified) {
if (max_width < 4) return 1;
ADD('+');
(*width)++;
ADD(' ');
(*width)++;
}
while (*t) {
/* File names can definitely by UTF-8, and we need to
* understand their display width... */
if (!decode(&state, &c, (unsigned char)*t)) {
/* But our displayed tab name is also just stored
* as UTF-8 again, so we essentially rebuild it... */
char tmp[7];
int size = to_eight(c, tmp);
if (bytes + size > 62) break;
if (*width + size >= max_width) return 1;
for (int i = 0; i < size; ++i) {
ADD(tmp[i]);
}
(*width) += codepoint_width(c);
} else if (state == UTF8_REJECT) {
state = 0;
}
t++;
}
if (max_width == *width + 1) return 1;
ADD(' ');
(*width)++;
#undef ADD
return 0;
}
/**
* Redraw the tabbar, with a tab for each buffer.
*
* The active buffer is highlighted.
*/
void redraw_tabbar(void) {
if (!global_config.tabs_visible) return;
/* Hide cursor while rendering UI */
hide_cursor();
/* Move to upper left */
place_cursor(1,1);
paint_line(COLOR_TABBAR_BG);
/* For each buffer... */
int offset = 0;
if (global_config.tab_offset) {
set_colors(COLOR_NUMBER_FG, COLOR_NUMBER_BG);
printf("<");
offset++;
}
for (int i = global_config.tab_offset; i < buffers_len; i++) {
buffer_t * _env = buffers[i];
if (_env == env) {
/* If this is the active buffer, highlight 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 (global_config.overlay_mode == OVERLAY_MODE_FILESEARCH) {
if (global_config.command_buffer->actual) {
char * f = _env->file_name ? file_basename(_env->file_name) : "";
/* TODO: Support unicode input here; needs conversion */
int i = 0;
for (; i < global_config.command_buffer->actual &&
f[i] == global_config.command_buffer->text[i].codepoint; ++i);
if (global_config.command_buffer->actual == i) {
set_colors(COLOR_SEARCH_FG, COLOR_SEARCH_BG);
}
}
}
char title[64];
int size = 0;
int filled = draw_tab_name(_env, title, global_config.term_width - offset, &size);
if (filled) {
offset += size;
printf("%s", title);
set_colors(COLOR_NUMBER_FG, COLOR_NUMBER_BG);
while (offset != global_config.term_width - 1) {
printf(" ");
offset++;
}
printf(">");
break;
}
printf("%s", title);
offset += size;
}
/* 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 figuring out the width of the
* line number column.
*/
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, but those elements
* are rendered elsewhere; this method can be used for lines that are
* not attached to a buffer such as command input lines.
*
* 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 line_no) {
int i = 0; /* Offset in char_t line data entries */
int j = 0; /* Offset in terminal cells */
const char * last_color = NULL;
int was_selecting = 0, was_searching = 0, was_underlining = 0;
/* Set default text colors */
set_colors(COLOR_FG, line->is_current ? COLOR_ALT_BG : COLOR_BG);
/*
* When we are rendering in the middle of a wide character,
* we render -'s to fill the remaining amount of the character's width.
*/
int remainder = 0;
int is_spaces = 1;
/* 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) {
if (was_underlining) printf("\033[24m");
/* Fill remainder with -'s */
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("-");
set_colors(COLOR_FG, line->is_current ? COLOR_ALT_BG : 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 (c.codepoint != ' ') is_spaces = 0;
/* 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 (was_underlining) printf("\033[24m");
/* If it's wide, draw ---> as needed */
while (j - offset < width - 1) {
printf("-");
j++;
}
/* End the line with a > to show it overflows */
printf(">");
set_colors(COLOR_FG, COLOR_BG);
return;
}
/* Syntax highlighting */
const char * color = flag_to_color(c.flags);
if (c.flags & FLAG_SELECT) {
if ((c.flags & FLAG_MASK_COLORS) == FLAG_NONE) color = COLOR_SELECTFG;
set_colors(color, COLOR_SELECTBG);
was_selecting = 1;
} else if ((c.flags & FLAG_SEARCH) || (c.flags == FLAG_NOTICE)) {
set_colors(COLOR_SEARCH_FG, COLOR_SEARCH_BG);
was_searching = 1;
} else if (c.flags == FLAG_ERROR) {
set_colors(COLOR_ERROR_FG, COLOR_ERROR_BG);
was_searching = 1; /* co-opting this should work... */
} else {
if (was_selecting || was_searching) {
was_selecting = 0;
was_searching = 0;
set_colors(color, line->is_current ? COLOR_ALT_BG : COLOR_BG);
last_color = color;
} else if (!last_color || strcmp(color, last_color)) {
set_fg_color(color);
last_color = color;
}
}
if ((c.flags & FLAG_UNDERLINE) && !was_underlining) {
printf("\033[4m");
was_underlining = 1;
} else if (!(c.flags & FLAG_UNDERLINE) && was_underlining) {
printf("\033[24m");
was_underlining = 0;
}
if ((env->mode == MODE_COL_SELECTION || env->mode == MODE_COL_INSERT) &&
line_no >= ((env->start_line < env->line_no) ? env->start_line : env->line_no) &&
line_no <= ((env->start_line < env->line_no) ? env->line_no : env->start_line) &&
((j == env->sel_col) ||
(j < env->sel_col && j + c.display_width > env->sel_col))) {
set_colors(COLOR_SELECTFG, COLOR_SELECTBG);
was_selecting = 1;
}
#define _set_colors(fg,bg) \
if (!(c.flags & FLAG_SELECT) && !(c.flags & FLAG_SEARCH) && !(was_selecting)) { \
set_colors(fg,(line->is_current && bg == COLOR_BG) ? COLOR_ALT_BG : bg); \
}
/* Render special characters */
if (c.codepoint == '\t') {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("%s", global_config.tab_indicator);
for (int i = 1; i < c.display_width; ++i) {
printf("%s" ,global_config.space_indicator);
}
_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 if (c.codepoint == 0x7f) {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("^?");
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (c.codepoint > 0x7f && c.codepoint < 0xa0) {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("<%2x>", c.codepoint);
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (c.codepoint == 0xa0) {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("_");
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (c.display_width == 8) {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("[U+%04x]", c.codepoint);
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (c.display_width == 10) {
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("[U+%06x]", c.codepoint);
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (i > 0 && is_spaces && c.codepoint == ' ' && !(i % env->tabstop)) {
_set_colors(COLOR_ALT_FG, COLOR_BG); /* Normal background so this is more subtle */
if (global_config.can_unicode) {
printf("▏");
} else {
printf("|");
}
_set_colors(last_color ? last_color : COLOR_FG, COLOR_BG);
} else if (c.codepoint == ' ' && i == line->actual - 1) {
/* Special case: space at end of line */
_set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("%s",global_config.space_indicator);
_set_colors(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++;
}
}
if (was_underlining) printf("\033[24m");
/**
* Determine what color the rest of the line should be.
*/
if (env->mode != MODE_LINE_SELECTION) {
/* If we are not selecting, then use the normal background or highlight
* the current line if that feature is enabled. */
if (line->is_current) {
set_colors(COLOR_FG, COLOR_ALT_BG);
} else {
set_colors(COLOR_FG, COLOR_BG);
}
} else {
/* If this line was empty but was part of the selection, we didn't
* set the selection color already, so we need to do that here. */
if (!line->actual) {
if (env->line_no == line_no ||
(env->start_line > env->line_no &&
(line_no >= env->line_no && line_no <= env->start_line)) ||
(env->start_line < env->line_no &&
(line_no >= env->start_line && line_no <= env->line_no))) {
set_colors(COLOR_SELECTFG, COLOR_SELECTBG);
}
}
}
/**
* In column modes, we may need to draw a column select beyond the end
* of a given line, so we need to draw up to that point first.
*/
if ((env->mode == MODE_COL_SELECTION || env->mode == MODE_COL_INSERT) &&
line_no >= ((env->start_line < env->line_no) ? env->start_line : env->line_no) &&
line_no <= ((env->start_line < env->line_no) ? env->line_no : env->start_line) &&
j <= env->sel_col &&
env->sel_col < width) {
set_colors(COLOR_FG, COLOR_BG);
while (j < env->sel_col) {
printf(" ");
j++;
}
set_colors(COLOR_SELECTFG, COLOR_SELECTBG);
printf(" ");
j++;
set_colors(COLOR_FG, COLOR_BG);
}
/*
* `maxcolumn` renders the background outside of the requested line length
* in a different color, with a line at the border between the two.
*/
if (env->maxcolumn && line_no > -1 /* ensures we don't do this for command line */) {
/* Fill out the normal background */
if (j < offset) j = offset;
for (; j < width + offset && j < env->maxcolumn; ++j) {
printf(" ");
}
/* Draw the line */
if (j < width + offset && j == env->maxcolumn) {
j++;
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
if (global_config.can_unicode) {
printf("▏"); /* Should this be configurable? */
} else {
printf("|");
}
}
/* Fill the rest with the alternate background color */
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
}
/**
* Clear out the rest of the line. If we are the only buffer or the right split,
* and our terminal supports `bce`, we can just bce; otherwise write spaces
* until we reach the right side of the screen.
*/
if (global_config.can_bce && (line_no == -1 || env->left + env->width == global_config.term_width)) {
clear_to_end();
} else {
/* Paint the rest of the line */
if (j < offset) j = offset;
for (; j < width + offset; ++j) {
printf(" ");
}
}
}
/**
* Get the width of the line number region
*/
int num_width(void) {
if (!env->numbers) return 0;
int w = log_base_10(env->line_count) + 3;
if (w < 4) return 4;
return w;
}
/**
* Display width of the revision status gutter.
*/
int gutter_width(void) {
return env->gutter;
}
/**
* Draw the gutter and line numbers.
*/
void draw_line_number(int x) {
if (!env->numbers) return;
/* Draw the line number */
if (env->lines[x]->is_current) {
set_colors(COLOR_NUMBER_BG, COLOR_NUMBER_FG);
} else {
set_colors(COLOR_NUMBER_FG, COLOR_NUMBER_BG);
}
if (global_config.relative_lines && x+1 != env->line_no) {
x = x+1 - env->line_no;
x = ((x < 0) ? -x : x)-1;
}
int num_size = num_width() - 2; /* Padding */
for (int y = 0; y < num_size - log_base_10(x + 1); ++y) {
printf(" ");
}
printf("%d%c", x + 1, ((x+1 == env->line_no || global_config.horizontal_shift_scrolling) && env->coffset > 0) ? '<' : ' ');
}
/**
* Used to highlight the current line after moving the cursor.
*/
void recalculate_current_line(void) {
int something_changed = 0;
if (global_config.highlight_current_line) {
for (int i = 0; i < env->line_count; ++i) {
if (env->lines[i]->is_current && i != env->line_no-1) {
env->lines[i]->is_current = 0;
something_changed = 1;
redraw_line(i);
} else if (i == env->line_no-1 && !env->lines[i]->is_current) {
env->lines[i]->is_current = 1;
something_changed = 1;
redraw_line(i);
}
}
} else {
something_changed = 1;
}
if (something_changed && global_config.relative_lines) {
for (int i = env->offset; i < env->offset + global_config.term_height - global_config.bottom_size - 1 && i < env->line_count; ++i) {
/* Place cursor for line number */
place_cursor(1 + gutter_width() + env->left, (i)-env->offset + 1 + global_config.tabs_visible);
draw_line_number(i);
}
}
}
/**
* Redraw line.
*
* This draws the line number as well as the actual text.
*/
void redraw_line(int x) {
if (env->loading) return;
/* Determine if this line is visible. */
if (x - env->offset < 0 || x - env->offset > global_config.term_height - global_config.bottom_size - 1 - global_config.tabs_visible) {
return;
}
/* Calculate offset in screen */
int j = x - env->offset;
/* Hide cursor when drawing */
hide_cursor();
/* Move cursor to upper left most cell of this line */
place_cursor(1 + env->left,1 + global_config.tabs_visible + j);
/* Draw a gutter on the left. */
if (env->gutter) {
switch (env->lines[x]->rev_status) {
case 1:
set_colors(COLOR_NUMBER_FG, COLOR_GREEN);
printf(" ");
break;
case 2:
set_colors(COLOR_NUMBER_FG, global_config.color_gutter ? COLOR_SEARCH_BG : COLOR_ALT_FG);
printf(" ");
break;
case 3:
set_colors(COLOR_NUMBER_FG, COLOR_KEYWORD);
printf(" ");
break;
case 4:
set_colors(COLOR_ALT_FG, COLOR_RED);
printf("▆");
break;
case 5:
set_colors(COLOR_KEYWORD, COLOR_RED);
printf("▆");
break;
default:
set_colors(COLOR_NUMBER_FG, COLOR_ALT_FG);
printf(" ");
break;
}
}
draw_line_number(x);
int should_shift = x + 1 == env->line_no || global_config.horizontal_shift_scrolling ||
((env->mode == MODE_COL_SELECTION || env->mode == MODE_COL_INSERT) &&
x + 1 >= ((env->start_line < env->line_no) ? env->start_line : env->line_no) &&
x + 1 <= ((env->start_line < env->line_no) ? env->line_no : env->start_line));
/*
* 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], env->width - gutter_width() - num_width(), should_shift ? env->coffset : 0, x+1);
}
/**
* Draw a ~ line where there is no buffer text.
*/
void draw_excess_line(int j) {
place_cursor(1+env->left,1 + global_config.tabs_visible + j);
paint_line(COLOR_ALT_BG);
set_colors(COLOR_ALT_FG, COLOR_ALT_BG);
printf("~");
if (env->left + env->width == global_config.term_width && global_config.can_bce) {
clear_to_end();
} else {
/* Paint the rest of the line */
for (int x = 1; x < env->width; ++x) {
printf(" ");
}
}
}
/**
* Redraw the entire text area
*/
void redraw_text(void) {
if (!env) return;
if (!global_config.has_terminal) return;
/* Hide cursor while rendering */
hide_cursor();
/* Figure out the available size of the text region */
int l = global_config.term_height - global_config.bottom_size - global_config.tabs_visible;
int j = 0;
/* Draw each line */
for (int x = env->offset; j < l && x < env->line_count; x++) {
redraw_line(x);
j++;
}
/* Draw the rest of the text region as ~ lines */
for (; j < l; ++j) {
draw_excess_line(j);
}
}
static int view_left_offset = 0;
static int view_right_offset = 0;
/**
* When in split view, draw the other buffer.
* Has special handling for when the split is
* on a single buffer.
*/
void redraw_alt_buffer(buffer_t * buf) {
if (left_buffer == right_buffer) {
/* draw the opposite view */
int left, width, offset;
left = env->left;
width = env->width;
offset = env->offset;
if (left == 0) {
/* Draw the right side */
env->left = width;
env->width = global_config.term_width - width;
env->offset = view_right_offset;
view_left_offset = offset;
} else {
env->left = 0;
env->width = global_config.term_width * global_config.split_percent / 100;
env->offset = view_left_offset;
view_right_offset = offset;
}
redraw_text();
env->left = left;
env->width = width;
env->offset = offset;
}
/* Swap out active buffer */
buffer_t * tmp = env;
env = buf;
/* Redraw text */
redraw_text();
/* Return original active buffer */
env = tmp;
}
/**
* Basically wcswidth() but implemented internally using our
* own utf-8 decoder to ensure it works properly.
*/
int display_width_of_string(const char * str) {
uint8_t * s = (uint8_t *)str;
int out = 0;
uint32_t c, state = 0;
while (*s) {
if (!decode(&state, &c, *s)) {
out += codepoint_width(c);
} else if (state == UTF8_REJECT) {
state = 0;
}
s++;
}
return out;
}
int statusbar_append_status(int *remaining_width, size_t *filled, char * output, char * base, ...) {
va_list args;
va_start(args, base);
char tmp[100] = {0}; /* should be big enough */
vsnprintf(tmp, 100, base, args);
va_end(args);
int width = display_width_of_string(tmp) + 2;
size_t totalWidth = strlen(tmp);
totalWidth += strlen(color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
totalWidth += strlen(color_string(COLOR_STATUS_FG, COLOR_STATUS_BG));
totalWidth += strlen(color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
totalWidth += 3;
if (totalWidth + *filled >= 2047) {
return 0;
}
if (width < *remaining_width) {
strcat(output,color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
strcat(output,"[");
strcat(output,color_string(COLOR_STATUS_FG, COLOR_STATUS_BG));
strcat(output, tmp);
strcat(output,color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
strcat(output,"]");
(*remaining_width) -= width;
(*filled) += totalWidth;
return width;
} else {
return 0;
}
}
int statusbar_build_right(char * right_hand) {
char tmp[1024] = {0};
sprintf(tmp, " Line %d/%d Col: %d ", env->line_no, env->line_count, env->col_no);
int out = display_width_of_string(tmp);
char * s = right_hand;
s += sprintf(s, "%s", color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
s += sprintf(s, " Line ");
s += sprintf(s, "%s", color_string(COLOR_STATUS_FG, COLOR_STATUS_BG));
s += sprintf(s, "%d/%d ", env->line_no, env->line_count);
s += sprintf(s, "%s", color_string(COLOR_STATUS_ALT, COLOR_STATUS_BG));
s += sprintf(s, " Col: ");
s += sprintf(s, "%s", color_string(COLOR_STATUS_FG, COLOR_STATUS_BG));
s += sprintf(s, "%d ", env->col_no);
return out;
}
/**
* 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 status bar shows the line number and column.
*/
void redraw_statusbar(void) {
if (global_config.hide_statusbar) return;
if (!global_config.has_terminal) return;
if (!env) return;
/* Hide cursor while rendering */
hide_cursor();
/* Move cursor to the status bar line (second from bottom */
place_cursor(1, global_config.term_height - 1);
/* Set background colors for status line */
paint_line(COLOR_STATUS_BG);
set_colors(COLOR_STATUS_FG, COLOR_STATUS_BG);
/* Pre-render the right hand side of the status bar */
char right_hand[1024] = {0};
int right_width = statusbar_build_right(right_hand);
char status_bits[2048] = {0}; /* Sane maximum */
size_t filled = 0;
int status_bits_width = 0;
int remaining_width = global_config.term_width - right_width;
#define ADD(...) do { status_bits_width += statusbar_append_status(&remaining_width, &filled, status_bits, __VA_ARGS__); } while (0)
if (env->syntax) {
ADD("%s",env->syntax->name);
}
/* Print file status indicators */
if (env->modified) {
ADD("+");
}
if (env->readonly) {
ADD("ro");
}
if (env->crnl) {
ADD("crnl");
}
if (env->tabs) {
ADD("tabs");
} else {
ADD("spaces=%d", env->tabstop);
}
if (global_config.yanks) {
ADD("y:%ld", global_config.yank_count);
}
if (env->indent) {
ADD("indent");
}
if (global_config.smart_complete) {
ADD("complete");
}
if (global_config.background_task) {
ADD("working");
}
#undef ADD
uint8_t * file_name = (uint8_t *)(env->file_name ? env->file_name : "[No Name]");
int file_name_width = display_width_of_string((char*)file_name);
if (remaining_width > 3) {
int is_chopped = 0;
while (remaining_width < file_name_width + 3) {
is_chopped = 1;
if ((*file_name & 0xc0) == 0xc0) { /* First byte of a multibyte character */
file_name++;
while ((*file_name & 0xc0) == 0x80) file_name++;
} else {
file_name++;
}
file_name_width = display_width_of_string((char*)file_name);
}
if (is_chopped) {
set_colors(COLOR_ALT_FG, COLOR_STATUS_BG);
printf("<");
}
set_colors(COLOR_STATUS_FG, COLOR_STATUS_BG);
printf("%s ", file_name);
}
printf("%s", status_bits);
/* Clear the rest of the status bar */
clear_to_end();
/* Move the cursor appropriately to draw it */
place_cursor(global_config.term_width - right_width, global_config.term_height - 1);
set_colors(COLOR_STATUS_FG, COLOR_STATUS_BG);
printf("%s",right_hand);
}
/**
* Redraw the navigation numbers on the right side of the command line
*/
void redraw_nav_buffer() {
if (!global_config.has_terminal) return;
if (nav_buffer) {
store_cursor();
place_cursor(global_config.term_width - nav_buffer - 2, global_config.term_height);
printf("%s", nav_buf);
clear_to_end();
restore_cursor();
}
}
/**
* 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) {
if (!global_config.has_terminal) return;
if (!env) return;
/* Hide cursor while rendering */
hide_cursor();
/* Move cursor to the last line */
place_cursor(1, global_config.term_height);
/* Set background color */
paint_line(COLOR_BG);
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();
unset_bold();
} else if (env->mode == MODE_LINE_SELECTION) {
set_bold();
printf("-- LINE SELECTION -- (%d:%d)",
(env->start_line < env->line_no) ? env->start_line : env->line_no,
(env->start_line < env->line_no) ? env->line_no : env->start_line
);
clear_to_end();
unset_bold();
} else if (env->mode == MODE_COL_SELECTION) {
set_bold();
printf("-- COL SELECTION -- (%d:%d %d)",
(env->start_line < env->line_no) ? env->start_line : env->line_no,
(env->start_line < env->line_no) ? env->line_no : env->start_line,
(env->sel_col)
);
clear_to_end();
unset_bold();
} else if (env->mode == MODE_COL_INSERT) {
set_bold();
printf("-- COL INSERT -- (%d:%d %d)",
(env->start_line < env->line_no) ? env->start_line : env->line_no,
(env->start_line < env->line_no) ? env->line_no : env->start_line,
(env->sel_col)
);
clear_to_end();
unset_bold();
} else if (env->mode == MODE_REPLACE) {
set_bold();
printf("-- REPLACE --");
clear_to_end();
unset_bold();
} else if (env->mode == MODE_CHAR_SELECTION) {
set_bold();
printf("-- CHAR SELECTION -- ");
clear_to_end();
unset_bold();
} else if (env->mode == MODE_DIRECTORY_BROWSE) {
set_bold();
printf("-- DIRECTORY BROWSE --");
clear_to_end();
unset_bold();
} else {
clear_to_end();
}
redraw_nav_buffer();
}
/**
* Draw a message on the command line.
*/
void render_commandline_message(char * message, ...) {
/* varargs setup */
va_list args;
va_start(args, message);
/* Hide cursor while rendering */
hide_cursor();
/* Move cursor to the last line */
place_cursor(1, global_config.term_height);
/* Set background color */
paint_line(COLOR_BG);
set_colors(COLOR_FG, COLOR_BG);
vprintf(message, args);
va_end(args);
/* Clear the rest of the status bar */
clear_to_end();
redraw_nav_buffer();
}
BIM_ACTION(redraw_all, 0,
"Repaint the screen."
)(void) {
if (!env) return;
redraw_tabbar();
redraw_text();
if (left_buffer) {
redraw_alt_buffer(left_buffer == env ? right_buffer : left_buffer);
}
redraw_statusbar();
redraw_commandline();
if (global_config.overlay_mode == OVERLAY_MODE_COMMAND ||
global_config.overlay_mode == OVERLAY_MODE_SEARCH ||
global_config.overlay_mode == OVERLAY_MODE_FILESEARCH) {
render_command_input_buffer();
}
}
void pause_for_key(void) {
int c;
while ((c = bim_getch())== -1);
bim_unget(c);
redraw_all();
}
/**
* Redraw all screen elements except the other split view.
*/
void redraw_most(void) {
redraw_tabbar();
redraw_text();
redraw_statusbar();
redraw_commandline();
}
/**
* Disable screen splitting.
*/
void unsplit(void) {
if (left_buffer) {
left_buffer->left = 0;
left_buffer->width = global_config.term_width;
}
if (right_buffer) {
right_buffer->left = 0;
right_buffer->width = global_config.term_width;
}
left_buffer = NULL;
right_buffer = NULL;
redraw_all();
}
/**
* Update the terminal title bar
*/
void update_title(void) {
if (!global_config.can_title) return;
char cwd[1024] = {'/',0};
getcwd(cwd, 1024);
for (int i = 1; i < 3; ++i) {
printf("\033]%d;%s%s (%s) - Bim\007", i, env->file_name ? env->file_name : "[No 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, ...) {
if (!env) return; /* Don't print when there's no active environment; this usually means a bimrc command tried to print something */
/* varargs setup */
va_list args;
va_start(args, message);
/* Hide cursor while rendering */
hide_cursor();
/* Move cursor to the status bar line (second from bottom */
place_cursor(1, global_config.term_height - 1);
/* Set background colors for status line */
paint_line(COLOR_STATUS_BG);
set_colors(COLOR_STATUS_FG, COLOR_STATUS_BG);
/* Process format string */
vprintf(message, args);
va_end(args);
/* Clear the rest of the status bar */
clear_to_end();
}
/**
* Draw an error message to the command line.
*/
void render_error(char * message, ...) {
/* varargs setup */
va_list args;
va_start(args, message);
if (env) {
/* Hide cursor while rendering */
hide_cursor();
/* Move cursor to the command line */
place_cursor(1, global_config.term_height);
/* Set appropriate error message colors */
set_colors(COLOR_ERROR_FG, COLOR_ERROR_BG);
/* Draw the message */
vprintf(message, args);
va_end(args);
global_config.had_error = 1;
} else {
printf("bim: error during startup: ");
vprintf(message, args);
va_end(args);
printf("\n");
}
}
char * paren_pairs = "()[]{}<>";
int is_paren(int c) {
char * p = paren_pairs;
while (*p) {
if (c == *p) return 1;
p++;
}
return 0;
}
#define _rehighlight_parens() do { \
if (i < 0 || i >= env->line_count) break; \
for (int j = 0; j < env->lines[i]->actual; ++j) { \
if (i == line-1 && j == col-1) { \
env->lines[line-1]->text[col-1].flags |= FLAG_SELECT; \
continue; \
} else { \
env->lines[i]->text[j].flags &= (~FLAG_SELECT); \
} \
} \
redraw_line(i); \
} while (0)
/**
* If the config option is enabled, find the matching
* paren character and highlight it with the SELECT
* colors, clearing out other SELECT values. As we
* co-opt the SELECT flag, don't do this in selection
* modes - only in normal and insert modes.
*/
void highlight_matching_paren(void) {
if (env->mode == MODE_LINE_SELECTION || env->mode == MODE_CHAR_SELECTION) return;
if (!global_config.highlight_parens) return;
int line = -1, col = -1;
if (env->line_no <= env->line_count && env->col_no <= env->lines[env->line_no-1]->actual &&
is_paren(env->lines[env->line_no-1]->text[env->col_no-1].codepoint)) {
find_matching_paren(&line, &col, 1);
} else if (env->line_no <= env->line_count && env->col_no > 1 && is_paren(env->lines[env->line_no-1]->text[env->col_no-2].codepoint)) {
find_matching_paren(&line, &col, 2);
}
if (env->highlighting_paren == -1 && line == -1) return;
if (env->highlighting_paren > 0) {
int i = env->highlighting_paren - 1;
_rehighlight_parens();
}
if (env->highlighting_paren != line && line != -1) {
int i = line - 1;
_rehighlight_parens();
}
env->highlighting_paren = line;
}
/**
* Recalculate syntax for the matched paren.
* Useful when entering selection modes.
*/
void unhighlight_matching_paren(void) {
if (env->highlighting_paren > 0 && env->highlighting_paren <= env->line_count) {
for (int i = 0; i < env->line_count; i++) {
for (int j = 0; j < env->lines[i]->actual; ++j) {
env->lines[i]->text[j].flags &= ~(FLAG_SELECT);
}
}
env->highlighting_paren = -1;
}
}
/**
* 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) {
/* Invalid positions */
if (env->line_no < 1) env->line_no = 1;
if (env->col_no < 1) env->col_no = 1;
/* Account for the left hand gutter */
int num_size = num_width() + gutter_width();
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;
int needs_redraw = 0;
while (y < 2 + global_config.cursor_padding && env->offset > 0) {
y++;
env->offset--;
needs_redraw = 1;
}
while (y > 1 + global_config.term_height - global_config.bottom_size - global_config.cursor_padding - global_config.tabs_visible) {
y--;
env->offset++;
needs_redraw = 1;
}
if (needs_redraw) {
redraw_text();
redraw_tabbar();
redraw_statusbar();
redraw_commandline();
}
/* If the cursor has gone off screen to the right... */
if (x > env->width - 1) {
/* Adjust the offset appropriately to scroll horizontally */
int diff = x - (env->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();
}
highlight_matching_paren();
recalculate_current_line();
/* Move the actual terminal cursor */
place_cursor(x+env->left,y - !global_config.tabs_visible);
/* Show the cursor */
show_cursor();
}
/**
* If the screen is split, update the split sizes based
* on the new terminal width and the user's split_percent setting.
*/
void update_split_size(void) {
if (!left_buffer) return;
if (left_buffer == right_buffer) {
if (left_buffer->left == 0) {
left_buffer->width = global_config.term_width * global_config.split_percent / 100;
} else {
right_buffer->left = global_config.term_width * global_config.split_percent / 100;
right_buffer->width = global_config.term_width - right_buffer->left;
}
return;
}
left_buffer->left = 0;
left_buffer->width = global_config.term_width * global_config.split_percent / 100;
right_buffer->left = left_buffer->width;
right_buffer->width = global_config.term_width - left_buffer->width;
}
/**
* Update screen size
*/
void update_screen_size(void) {
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
global_config.term_width = w.ws_col;
global_config.term_height = w.ws_row;
if (env) {
if (left_buffer) {
update_split_size();
} else if (env != left_buffer && env != right_buffer) {
env->width = w.ws_col;
}
}
for (int i = 0; i < buffers_len; ++i) {
if (buffers[i] != left_buffer && buffers[i] != right_buffer) {
buffers[i]->width = w.ws_col;
}
}
}
/**
* Handle terminal size changes
*/
void SIGWINCH_handler(int sig) {
(void)sig;
update_screen_size();
redraw_all();
signal(SIGWINCH, SIGWINCH_handler);
}
/**
* Handle suspend
*/
void SIGTSTP_handler(int sig) {
(void)sig;
mouse_disable();
set_buffered();
reset();
clear_screen();
show_cursor();
unset_bracketed_paste();
unset_alternate_screen();
fflush(stdout);
signal(SIGTSTP, SIG_DFL);
raise(SIGTSTP);
}
void SIGCONT_handler(int sig) {
(void)sig;
set_alternate_screen();
set_bracketed_paste();
set_unbuffered();
update_screen_size();
mouse_enable();
redraw_all();
update_title();
signal(SIGCONT, SIGCONT_handler);
signal(SIGTSTP, SIGTSTP_handler);
}
void try_to_center() {
int half_a_screen = (global_config.term_height - 3) / 2;
if (half_a_screen < env->line_no) {
env->offset = env->line_no - half_a_screen;
} else {
env->offset = 0;
}
}
BIM_ACTION(suspend, 0,
"Suspend bim and the rest of the job it was run in."
)(void) {
kill(0, SIGTSTP);
}
/**
* Move the cursor to a specific line.
*/
BIM_ACTION(goto_line, ARG_IS_CUSTOM,
"Jump to the requested line."
)(int line) {
if (line == -1) line = env->line_count;
/* 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->line_no = line;
env->col_no = 1;
if (!env->loading) {
if (line > env->offset && line < env->offset + global_config.term_height - global_config.bottom_size) {
place_cursor_actual();
} else {
try_to_center();
}
redraw_most();
} else {
try_to_center();
}
}
/**
* Process (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') {
if (!env->crnl && env->lines[env->line_no-1]->actual && env->lines[env->line_no-1]->text[env->lines[env->line_no-1]->actual-1].codepoint == '\r') {
env->lines[env->line_no-1]->actual--;
env->crnl = 1;
}
env->lines = add_line(env->lines, env->line_no);
env->col_no = 1;
env->line_no += 1;
} else if (env->crnl && c == '\r') {
continue;
} 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;
}
}
}
/**
* Add a raw string to a buffer. Convenience wrapper
* for add_buffer for nil-terminated strings.
*/
void add_string(char * string) {
add_buffer((uint8_t*)string,strlen(string));
}
int str_ends_with(const char * haystack, const char * needle) {
int i = strlen(haystack);
int j = strlen(needle);
do {
if (haystack[i] != needle[j]) return 0;
if (j == 0) return 1;
if (i == 0) return 0;
i--;
j--;
} while (1);
}
/**
* Find a syntax highlighter for the given filename.
*/
struct syntax_definition * match_syntax(char * file) {
for (struct syntax_definition * s = syntaxes; syntaxes && s->name; ++s) {
for (char ** ext = s->ext; *ext; ++ext) {
if (str_ends_with(file, *ext)) return s;
}
}
return NULL;
}
/**
* Set the syntax configuration by the name of the syntax highlighter.
*/
void set_syntax_by_name(const char * name) {
if (!strcmp(name,"none")) {
for (int i = 0; i < env->line_count; ++i) {
env->lines[i]->istate = -1;
for (int j = 0; j < env->lines[i]->actual; ++j) {
env->lines[i]->text[j].flags &= (3 << 5);
}
}
env->syntax = NULL;
redraw_all();
return;
}
for (struct syntax_definition * s = syntaxes; syntaxes && s->name; ++s) {
if (!strcmp(name,s->name)) {
env->syntax = s;
for (int i = 0; i < env->line_count; ++i) {
env->lines[i]->istate = -1;
}
schedule_complete_recalc();
redraw_all();
return;
}
}
render_error("unrecognized syntax type");
}
/**
* Check if a string is all numbers.
*/
int is_all_numbers(const char * c) {
while (*c) {
if (!isdigit(*c)) return 0;
c++;
}
return 1;
}
struct file_listing {
int type;
char * filename;
};
int sort_files(const void * a, const void * b) {
struct file_listing * _a = (struct file_listing *)a;
struct file_listing * _b = (struct file_listing *)b;
if (_a->type == _b->type) {
return strcmp(_a->filename, _b->filename);
} else {
return _a->type - _b->type;
}
}
void read_directory_into_buffer(char * file) {
DIR * dirp = opendir(file);
if (!dirp) {
env->loading = 0;
return;
}
add_string("# Directory listing for `");
add_string(file);
add_string("`\n");
/* Flexible array to hold directory contents */
int available = 32;
int count = 0;
struct file_listing * files = calloc(sizeof(struct file_listing), available);
/* Read directory */
struct dirent * ent = readdir(dirp);
while (ent) {
struct stat statbuf;
char * tmp = malloc(strlen(file) + 1 + strlen(ent->d_name) + 1);
snprintf(tmp, strlen(file) + 1 + strlen(ent->d_name) + 1, "%s/%s", file, ent->d_name);
stat(tmp, &statbuf);
int type = (S_ISDIR(statbuf.st_mode)) ? 'd' : 'f';
if (count + 1 == available) {
available *= 2; \
files = realloc(files, sizeof(struct file_listing) * available); \
} \
files[count].type = type;
files[count].filename = strdup(ent->d_name);
count++;
ent = readdir(dirp);
free(tmp);
}
closedir(dirp);
/* Sort directory entries */
qsort(files, count, sizeof(struct file_listing), sort_files);
for (int i = 0; i < count; ++i) {
add_string(files[i].type == 'd' ? "d" : "f");
add_string(" ");
add_string(files[i].filename);
add_string("\n");
free(files[i].filename);
}
free(files);
env->file_name = strdup(file);
env->syntax = find_syntax_calculator("dirent");
schedule_complete_recalc();
env->readonly = 1;
env->loading = 0;
env->mode = MODE_DIRECTORY_BROWSE;
env->line_no = 1;
redraw_all();
}
BIM_ACTION(open_file_from_line, 0,
"When browsing a directory, open the file under the cursor."
)(void) {
if (env->lines[env->line_no-1]->actual < 1) return;
if (env->lines[env->line_no-1]->text[0].codepoint != 'd' &&
env->lines[env->line_no-1]->text[0].codepoint != 'f') return;
/* Collect file name */
char * tmp = malloc(strlen(env->file_name) + 1 + env->lines[env->line_no-1]->actual * 7); /* Should be enough */
memset(tmp, 0, strlen(env->file_name) + 1 + env->lines[env->line_no-1]->actual * 7);
char * t = tmp;
/* Start by copying the filename */
t += sprintf(t, "%s/", env->file_name);
/* Start from character 2 to skip d/f and space */
for (int i = 2; i < env->lines[env->line_no-1]->actual; ++i) {
t += to_eight(env->lines[env->line_no-1]->text[i].codepoint, t);
}
*t = '\0';
/* Normalize */
char tmp_path[PATH_MAX+1];
if (!realpath(tmp, tmp_path)) {
free(tmp);
return;
}
free(tmp);
/* Open file */
buffer_t * old_buffer = env;
open_file(tmp_path);
buffer_close(old_buffer);
update_title();
redraw_all();
}
int line_matches(line_t * line, char * string) {
uint32_t c = 0, state = 0;
int i = 0;
while (*string) {
if (!decode(&state, &c, *string)) {
if (i >= line->actual) return 0;
if (line->text[i].codepoint != c) return 0;
string++;
i++;
} else if (state == UTF8_REJECT) {
state = 0;
}
}
return 1;
}
void run_onload(buffer_t * env) {
/* TODO */
KrkValue onLoad;
if (krk_tableGet_fast(&krk_currentThread.module->fields, S("onload"), &onLoad)) {
krk_push(onLoad);
krk_push(krk_dict_of(0,NULL,0));
if (env->file_name) {
krk_attachNamedObject(AS_DICT(krk_peek(0)), "filename",
(KrkObj*)krk_copyString(env->file_name,strlen(env->file_name)));
}
if (env->syntax && env->syntax->krkClass) {
krk_attachNamedObject(AS_DICT(krk_peek(0)), "highlighter",
(KrkObj*)env->syntax->krkClass);
}
krk_callStack(1);
krk_resetStack();
}
}
static void render_syntax_async(background_task_t * task) {
buffer_t * old_env = env;
env = task->env;
int line_no = task->_private_i;
if (env->line_count && line_no < env->line_count) {
int tmp = env->loading;
env->loading = 1;
recalculate_syntax(env->lines[line_no], line_no);
env->loading = tmp;
if (env == old_env) {
redraw_line(line_no);
}
}
env = old_env;
}
static void schedule_complete_recalc(void) {
if (env->line_count < 1000) {
for (int i = 0; i < env->line_count; ++i) {
recalculate_syntax(env->lines[i], i);
}
return;
}
/* TODO see if there's already a redraw scheduled */
for (int i = 0; i < env->line_count; ++i) {
background_task_t * task = malloc(sizeof(background_task_t));
task->env = env;
task->_private_i = i;
task->func = render_syntax_async;
task->next = NULL;
if (global_config.tail_task) {
global_config.tail_task->next = task;
}
global_config.tail_task = task;
if (!global_config.background_task) {
global_config.background_task = task;
}
}
redraw_statusbar();
}
/**
* Create a new buffer from a file.
*/
void open_file(char * file) {
env = buffer_new();
env->width = global_config.term_width;
env->left = 0;
env->loading = 1;
setup_buffer(env);
FILE * f;
int init_line = -1;
if (!strcmp(file,"-")) {
/**
* Read file from stdin. stderr provides terminal input.
*/
if (isatty(STDIN_FILENO)) {
if (buffers_len == 1) {
quit("stdin is a terminal and you tried to open -; not letting you do that");
}
close_buffer();
render_error("stdin is a terminal and you tried to open -; not letting you do that");
return;
}
f = stdin;
env->modified = 1;
} else {
char * l = strrchr(file, ':');
if (l && is_all_numbers(l+1)) {
*l = '\0';
l++;
init_line = atoi(l);
}
char * _file = file;
if (file[0] == '~') {
char * home = getenv("HOME");
if (home) {
_file = malloc(strlen(file) + strlen(home) + 4); /* Paranoia */
sprintf(_file, "%s%s", home, file+1);
}
}
if (file_is_open(_file)) {
if (file != _file) free(_file);
close_buffer();
return;
}
struct stat statbuf;
if (!stat(_file, &statbuf) && S_ISDIR(statbuf.st_mode)) {
read_directory_into_buffer(_file);
if (file != _file) free(_file);
return;
}
f = fopen(_file, "r");
if (file != _file) free(_file);
if (!f && errno != ENOENT) {
render_error("%s: %s", file, strerror(errno));
pause_for_key();
close_buffer();
return;
}
env->file_name = strdup(file);
}
if (!f) {
if (global_config.highlight_on_open) {
env->syntax = match_syntax(file);
}
env->loading = 0;
if (global_config.go_to_line) {
goto_line(1);
}
if (env->syntax && env->syntax->prefers_spaces) {
env->tabs = 0;
}
update_biminfo(env, 1);
run_onload(env);
return;
}
uint8_t buf[BLOCK_SIZE];
state = 0;
while (!feof(f) && !ferror(f)) {
size_t r = fread(buf, 1, BLOCK_SIZE, f);
add_buffer(buf, r);
}
if (ferror(f)) {
env->loading = 0;
return;
}
if (env->line_no && env->lines[env->line_no-1] && env->lines[env->line_no-1]->actual == 0) {
/* Remove blank line from end */
env->lines = remove_line(env->lines, env->line_no-1);
}
if (global_config.highlight_on_open) {
env->syntax = match_syntax(file);
if (!env->syntax) {
if (line_matches(env->lines[0], "<?xml")) set_syntax_by_name("xml");
else if (line_matches(env->lines[0], "<!doctype")) set_syntax_by_name("xml");
else if (line_matches(env->lines[0], "#!/usr/bin/env bash")) set_syntax_by_name("bash");
else if (line_matches(env->lines[0], "#!/bin/bash")) set_syntax_by_name("bash");
else if (line_matches(env->lines[0], "#!/bin/sh")) set_syntax_by_name("bash");
else if (line_matches(env->lines[0], "#!/usr/bin/env python")) set_syntax_by_name("py");
else if (line_matches(env->lines[0], "#!/usr/bin/env groovy")) set_syntax_by_name("groovy");
}
if (!env->syntax && global_config.syntax_fallback) {
set_syntax_by_name(global_config.syntax_fallback);
}
schedule_complete_recalc();
}
/* Try to automatically figure out tabs vs. spaces */
int tabs = 0, spaces = 0;
for (int i = 0; i < env->line_count; ++i) {
if (env->lines[i]->actual > 1) { /* Make sure line has at least some text on it */
if (env->lines[i]->text[0].codepoint == '\t') tabs++;
if (env->lines[i]->text[0].codepoint == ' ' &&
env->lines[i]->text[1].codepoint == ' ') /* Ignore spaces at the start of asterisky C comments */
spaces++;
}
}
if (spaces > tabs) {
env->tabs = 0;
} else if (spaces == tabs && env->syntax) {
env->tabs = env->syntax->prefers_spaces;
}
if (spaces > tabs) {
int one = 0, two = 0, three = 0, four = 0; /* If you use more than that, I don't like you. */
int lastCount = 0;
for (int i = 0; i < env->line_count; ++i) {
if (env->lines[i]->actual > 1 && !line_is_comment(env->lines[i])) {
/* Count spaces at beginning */
int c = 0, diff = 0;
while (c < env->lines[i]->actual && env->lines[i]->text[c].codepoint == ' ') c++;
if (c > lastCount) {
diff = c - lastCount;
} else if (c < lastCount) {
diff = lastCount - c;
}
if (diff == 1) one++;
if (diff == 2) two++;
if (diff == 3) three++;
if (diff == 4) four++;
lastCount = c;
}
}
if (four > three && four > two && four > one) {
env->tabstop = 4;
} else if (three > two && three > one) {
env->tabstop = 3;
} else if (two > one) {
env->tabstop = 2;
} else {
env->tabstop = 1;
}
}
env->loading = 0;
if (global_config.check_git) {
env->checkgitstatusonwrite = 1;
git_examine(file);
}
for (int i = 0; i < env->line_count; ++i) {
recalculate_tabs(env->lines[i]);
}
if (global_config.go_to_line) {
if (init_line != -1) {
goto_line(init_line);
} else {
env->line_no = 1;
env->col_no = 1;
fetch_from_biminfo(env);
place_cursor_actual();
redraw_all();
set_preferred_column();
}
}
update_biminfo(env, 1);
fclose(f);
run_onload(env);
}
/**
* Clean up the terminal and exit the editor.
*/
void quit(const char * message) {
mouse_disable();
set_buffered();
reset();
clear_screen();
show_cursor();
unset_bracketed_paste();
unset_alternate_screen();
krk_freeVM();
if (message) {
fprintf(stdout, "%s\n", message);
}
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;
}
}
/* Close all buffers */
while (buffers_len) {
buffer_close(buffers[0]);
}
quit(NULL);
}
/**
* Switch to the previous buffer
*/
BIM_ACTION(previous_tab, 0,
"Switch the 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;
if (left_buffer && (left_buffer != env && right_buffer != env)) unsplit();
redraw_all();
update_title();
return;
} else {
env = buffers[buffers_len-1];
if (left_buffer && (left_buffer != env && right_buffer != env)) unsplit();
redraw_all();
update_title();
return;
}
}
last = _env;
}
}
/**
* Switch to the next buffer
*/
BIM_ACTION(next_tab, 0,
"Switch to the 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];
if (left_buffer && (left_buffer != env && right_buffer != env)) unsplit();
redraw_all();
update_title();
return;
} else {
/* Wrap around */
env = buffers[0];
if (left_buffer && (left_buffer != env && right_buffer != env)) unsplit();
redraw_all();
update_title();
return;
}
}
}
}
/**
* Check for modified lines in a file by examining `git diff` output.
* This can be enabled globally in bimrc or per environment with the 'git' option.
*/
int git_examine(char * filename) {
if (env->modified) return 1;
int fds[2];
pipe(fds);
int child = fork();
if (child == 0) {
FILE * dev_null = fopen("/dev/null","w");
close(fds[0]);
dup2(fds[1], STDOUT_FILENO);
dup2(fileno(dev_null), STDERR_FILENO);
char * args[] = {"git","--no-pager","diff","-U0","--no-color","--",filename,NULL};
exit(execvp("git",args));
} else if (child < 0) {
return 1;
}
close(fds[1]);
FILE * f = fdopen(fds[0],"r");
int line_offset = 0;
while (!feof(f)) {
int c = fgetc(f);
if (c < 0) break;
if (c == '@' && line_offset == 0) {
/* Read line offset, count */
if (fgetc(f) == '@' && fgetc(f) == ' ' && fgetc(f) == '-') {
/* This algorithm is borrowed from Kakoune and only requires us to parse the @@ line */
int from_line = 0;
int from_count = 0;
int to_line = 0;
int to_count = 0;
fscanf(f,"%d",&from_line);
if (fgetc(f) == ',') {
fscanf(f,"%d",&from_count);
} else {
from_count = 1;
}
fscanf(f,"%d",&to_line);
if (fgetc(f) == ',') {
fscanf(f,"%d",&to_count);
} else {
to_count = 1;
}
if (to_line > env->line_count) continue;
if (from_count == 0 && to_count > 0) {
/* No -, all + means all of to_count is green */
for (int i = 0; i < to_count; ++i) {
env->lines[to_line+i-1]->rev_status = 1; /* Green */
}
} else if (from_count > 0 && to_count == 0) {
/*
* No +, all - means we have a deletion. We mark the next line such that it has a red bar at the top
* Note that to_line is one lower than the affected line, so we don't need to mess with indexes.
*/
if (to_line >= env->line_count) continue;
env->lines[to_line]->rev_status = 4; /* Red */
} else if (from_count > 0 && from_count == to_count) {
/* from = to, all modified */
for (int i = 0; i < to_count; ++i) {
env->lines[to_line+i-1]->rev_status = 3; /* Blue */
}
} else if (from_count > 0 && from_count < to_count) {
/* from < to, some modified, some added */
for (int i = 0; i < from_count; ++i) {
env->lines[to_line+i-1]->rev_status = 3; /* Blue */
}
for (int i = from_count; i < to_count; ++i) {
env->lines[to_line+i-1]->rev_status = 1; /* Green */
}
} else if (to_count > 0 && from_count > to_count) {
/* from > to, we deleted but also modified some lines */
env->lines[to_line-1]->rev_status = 5; /* Red + Blue */
for (int i = 1; i < to_count; ++i) {
env->lines[to_line+i-1]->rev_status = 3; /* Blue */
}
}
}
}
if (c == '\n') {
line_offset = 0;
continue;
}
line_offset++;
}
fclose(f);
return 0;
}
/**
* Write file contents to FILE
*/
void output_file(buffer_t * env, FILE * f) {
int i, j;
for (i = 0; i < env->line_count; ++i) {
line_t * line = env->lines[i];
line->rev_status = 0;
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);
}
}
if (env->crnl) fputc('\r', f);
fputc('\n', f);
}
}
/**
* Write active buffer to file
*/
void write_file(char * file) {
if (!file) {
render_error("Need a file to write to.");
return;
}
char * _file = file;
if (file[0] == '~') {
char * home = getenv("HOME");
if (home) {
_file = malloc(strlen(file) + strlen(home) + 4); /* Paranoia */
sprintf(_file, "%s%s", home, file+1);
}
}
FILE * f = fopen(_file, "w+");
if (file != _file) free(_file);
if (!f) {
render_error("Failed to open file for writing.");
return;
}
/* Go through each line and convert it back to UTF-8 */
output_file(env, f);
fclose(f);
/* Mark it no longer modified */
env->modified = 0;
env->last_save_history = env->history;
/* 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);
}
if (env->checkgitstatusonwrite) {
git_examine(file);
}
update_title();
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");
}
if (left_buffer && env == left_buffer) {
left_buffer = NULL;
right_buffer->left = 0;
right_buffer->width = global_config.term_width;
right_buffer = NULL;
} else if (left_buffer && env == right_buffer) {
right_buffer = NULL;
left_buffer->left = 0;
left_buffer->width = global_config.term_width;
left_buffer = NULL;
}
/* No more buffers, exit */
if (!new_env) {
quit(NULL);
}
/* Set the new active buffer */
env = new_env;
/* Redraw the screen */
redraw_all();
update_title();
}
/**
* Set the visual column the cursor should attempt to keep
* when moving up and down based on where the cursor currently is.
* This should happen whenever the user intentionally changes
* the cursor's horizontal positioning, such as with left/right
* arrow keys, word-move, search, mouse, etc.
*/
void set_preferred_column(void) {
int c = 0;
for (int i = 0; i < env->lines[env->line_no-1]->actual && i < env->col_no-1; ++i) {
c += env->lines[env->line_no-1]->text[i].display_width;
}
env->preferred_column = c;
}
BIM_ACTION(cursor_down, 0,
"Move the cursor one line 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;
/* Try to place the cursor horizontally at the preferred column */
int _x = 0;
for (int i = 0; i < env->lines[env->line_no-1]->actual; ++i) {
char_t * c = &env->lines[env->line_no-1]->text[i];
_x += c->display_width;
env->col_no = i+1;
if (_x > env->preferred_column) {
break;
}
}
if (env->mode == MODE_INSERT && _x <= env->preferred_column) {
env->col_no = env->lines[env->line_no-1]->actual + 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 (env->loading) return;
/*
* 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 + global_config.term_height - global_config.bottom_size - global_config.tabs_visible - global_config.cursor_padding) {
env->offset += 1;
/* Tell terminal to scroll */
if (global_config.can_scroll && !left_buffer) {
if (!global_config.can_insert) {
shift_up(1);
redraw_tabbar();
} else {
delete_lines_at(global_config.tabs_visible ? 2 : 1, 1);
}
/* A new line appears on screen at the bottom, draw it */
int l = global_config.term_height - global_config.bottom_size - global_config.tabs_visible;
if (env->offset + l < env->line_count + 1) {
redraw_line(env->offset + l-1);
} else {
draw_excess_line(l - 1);
}
} else {
redraw_text();
}
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();
}
set_history_break();
/* Update the status bar */
redraw_statusbar();
/* Place the terminal cursor again */
place_cursor_actual();
}
}
BIM_ACTION(cursor_up, 0,
"Move the cursor up one line."
)(void) {
/* If this isn't the first line already */
if (env->line_no > 1) {
/* Move the cursor down */
env->line_no -= 1;
/* Try to place the cursor horizontally at the preferred column */
int _x = 0;
for (int i = 0; i < env->lines[env->line_no-1]->actual; ++i) {
char_t * c = &env->lines[env->line_no-1]->text[i];
_x += c->display_width;
env->col_no = i+1;
if (_x > env->preferred_column) {
break;
}
}
if (env->mode == MODE_INSERT && _x <= env->preferred_column) {
env->col_no = env->lines[env->line_no-1]->actual + 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 (env->loading) return;
/*
* 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;
}
int e = (env->offset == 0) ? env->offset : env->offset + global_config.cursor_padding;
if (env->line_no <= e) {
env->offset -= 1;
/* Tell terminal to scroll */
if (global_config.can_scroll && !left_buffer) {
if (!global_config.can_insert) {
shift_down(1);
redraw_tabbar();
} else {
insert_lines_at(global_config.tabs_visible ? 2 : 1, 1);
}
/*
* The line at the top of the screen should always be real
* so we can just call redraw_line here
*/
redraw_line(env->offset);
} else {
redraw_tabbar();
redraw_text();
}
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();
}
set_history_break();
/* Update the status bar */
redraw_statusbar();
/* Place the terminal cursor again */
place_cursor_actual();
}
}
BIM_ACTION(cursor_left, 0,
"Move the cursor one character to the 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();
}
set_history_break();
set_preferred_column();
}
BIM_ACTION(cursor_right, 0,
"Move the cursor one character to the 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();
}
set_history_break();
set_preferred_column();
}
BIM_ACTION(cursor_home, 0,
"Move the cursor to the beginning of the line."
)(void) {
env->col_no = 1;
set_history_break();
set_preferred_column();
/* Update the status bar */
redraw_statusbar();
/* Place the terminal cursor again */
place_cursor_actual();
}
BIM_ACTION(cursor_end, 0,
"Move the cursor to the end of the line, or past the end in insert mode."
)(void) {
env->col_no = env->lines[env->line_no-1]->actual+!!(env->mode == MODE_INSERT);
set_history_break();
set_preferred_column();
/* Update the status bar */
redraw_statusbar();
/* Place the terminal cursor again */
place_cursor_actual();
}
BIM_ACTION(leave_insert, 0,
"Leave insert modes and return to normal mode."
)(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;
set_preferred_column();
}
set_history_break();
env->mode = MODE_NORMAL;
redraw_commandline();
}
/**
* Helper for handling smart case sensitivity.
*/
int search_matches(uint32_t a, uint32_t b, int mode) {
if (mode == 0) {
return a == b;
} else if (mode == 1) {
return tolower(a) == tolower(b);
}
return 0;
}
int subsearch_matches(line_t * line, int j, uint32_t * needle, int ignorecase, int *len) {
int k = j;
uint32_t * match = needle;
if (*match == '^') {
if (j != 0) return 0;
match++;
}
while (k < line->actual + 1) {
if (*match == '\0') {
if (len) *len = k - j;
return 1;
}
if (*match == '$') {
if (k != line->actual) return 0;
match++;
continue;
}
if (*match == '.') {
if (match[1] == '*') {
int greedy = !(match[2] == '?');
/* Short-circuit chained .*'s */
if (match[greedy ? 2 : 3] == '.' && match[greedy ? 3 : 4] == '*') {
int _len;
if (subsearch_matches(line, k, &match[greedy ? 2 : 3], ignorecase, &_len)) {
if (len) *len = _len + k - j;
return 1;
}
return 0;
}
int _j = greedy ? line->actual : k;
int _break = -1;
int _len = -1;
if (!match[greedy ? 2 : 3]) {
_len = greedy ? (line->actual - _j) : 0;
_break = _j;
} else {
while (_j < line->actual + 1 && _j >= k) {
int len;
if (subsearch_matches(line, _j, &match[greedy ? 2 : 3], ignorecase, &len)) {
_break = _j;
_len = len;
break;
}
_j += (greedy ? -1 : 1);
}
}
if (_break != -1) {
if (len) *len = (_break - j) + _len;
return 1;
}
return 0;
} else {
if (k >= line->actual) return 0;
match++;
k++;
continue;
}
}
if (*match == '\\' && (match[1] == '$' || match[1] == '^' || match[1] == '/' || match[1] == '\\' || match[1] == '.')) {
match++;
} else if (*match == '\\' && match[1] == 't') {
if (line->text[k].codepoint != '\t') break;
match += 2;
k++;
continue;
}
if (k == line->actual) break;
if (!search_matches(*match, line->text[k].codepoint, ignorecase)) break;
match++;
k++;
}
return 0;
}
/**
* Replace text on a given line with other text.
*/
void perform_replacement(int line_no, uint32_t * needle, uint32_t * replacement, int col, int ignorecase, int *out_col) {
line_t * line = env->lines[line_no-1];
int j = col;
while (j < line->actual + 1) {
int match_len;
if (subsearch_matches(line,j,needle,ignorecase,&match_len)) {
/* Perform replacement */
for (int i = 0; i < match_len; ++i) {
line_delete(line, j+1, line_no-1);
}
int t = 0;
for (uint32_t * r = replacement; *r; ++r) {
char_t _c;
_c.codepoint = *r;
_c.flags = 0;
_c.display_width = codepoint_width(*r);
line_t * nline = line_insert(line, _c, j + t, line_no -1);
if (line != nline) {
env->lines[line_no-1] = nline;
line = nline;
}
t++;
}
*out_col = j + t;
set_modified();
return;
}
j++;
}
*out_col = -1;
}
#define COMMAND_HISTORY_MAX 255
unsigned char * command_history[COMMAND_HISTORY_MAX] = {NULL};
/**
* Add a command to the history. If that command was
* already in history, it is moved to the front of the list;
* otherwise, the whole list is shifted backwards and
* overflow is freed up.
*/
void insert_command_history(char * cmd) {
/* See if this is already in the history. */
size_t amount_to_shift = COMMAND_HISTORY_MAX - 1;
for (int i = 0; i < COMMAND_HISTORY_MAX && command_history[i]; ++i) {
if (!strcmp((char*)command_history[i], cmd)) {
free(command_history[i]);
amount_to_shift = i;
break;
}
}
/* Remove last entry that will roll off the stack */
if (amount_to_shift == COMMAND_HISTORY_MAX - 1) {
if (command_history[COMMAND_HISTORY_MAX-1]) free(command_history[COMMAND_HISTORY_MAX-1]);
}
/* Roll the history */
memmove(&command_history[1], &command_history[0], sizeof(char *) * (amount_to_shift));
command_history[0] = (unsigned char*)strdup(cmd);
}
static uint32_t term_colors[] = {
0x000000, 0xcc0000, 0x3e9a06, 0xc4a000, 0x3465a4, 0x75507b, 0x06989a, 0xeeeeec, 0x555753, 0xef2929, 0x8ae234, 0xfce94f, 0x729fcf, 0xad7fa8, 0x34e2e2,
0xFFFFFF, 0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f, 0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f,
0x008787, 0x0087af, 0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff, 0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7,
0x00d7ff, 0x00ff00, 0x00ff5f, 0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af, 0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f,
0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff, 0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f, 0x5faf87, 0x5fafaf, 0x5fafd7,
0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af, 0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff, 0x870000, 0x87005f,
0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f, 0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af, 0x8787d7,
0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff, 0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af, 0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7,
0xaf5fff, 0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f, 0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f,
0xafd787, 0xafd7af, 0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff, 0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7,
0xd700ff, 0xd75f00, 0xd75f5f, 0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af, 0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f,
0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff, 0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f, 0xd7ff87, 0xd7ffaf, 0xd7ffd7,
0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af, 0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff, 0xff8700, 0xff875f,
0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f, 0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af, 0xffd7d7,
0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff, 0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e, 0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4,
0xeeeeee,
};
/**
* Convert a color setting from terminal format
* to a hexadecimal color code and add it to the current
* buffer. This is used for HTML conversion, but could
* possibly be used for other purposes.
*/
static void html_convert_color(const char * color_string) {
char tmp[100];
if (!strncmp(color_string,"2;",2)) {
/* 24-bit color */
int red, green, blue;
sscanf(color_string+2,"%d;%d;%d",&red,&green,&blue);
sprintf(tmp, "#%02x%02x%02x;", red,green,blue);
} else if (!strncmp(color_string,"5;",2)) {
/* 256 colors; needs lookup table */
int index;
sscanf(color_string+2,"%d",&index);
sprintf(tmp,"#%06x;", (unsigned int)term_colors[(index >= 0 && index <= 255) ? index : 0]);
} else {
/* 16 colors; needs lookup table */
int index;
uint32_t color;
sscanf(color_string+1,"%d",&index);
if (index >= 10) {
index -= 10;
color = term_colors[index+8];
} else if (index == 9) {
color = term_colors[0];
} else {
color = term_colors[index];
}
sprintf(tmp,"#%06x;", (unsigned int)color);
}
add_string(tmp);
char * italic = strstr(color_string,";3");
if (italic && italic[2] == '\0') {
add_string(" font-style: oblique;");
}
char * bold = strstr(color_string,";1");
if (bold && bold[2] == '\0') {
add_string(" font-weight: bold;");
}
char * underline = strstr(color_string,";4");
if (underline && underline[2] == '\0') {
add_string(" font-decoration: underline;");
}
}
int convert_to_html(void) {
buffer_t * old = env;
env = buffer_new();
setup_buffer(env);
env->loading = 1;
add_string("<!doctype html>\n");
add_string("<html>\n");
add_string(" <head>\n");
add_string(" <meta charset=\"UTF-8\">\n");
if (old->file_name) {
add_string(" <title>");
add_string(file_basename(old->file_name));
add_string("</title>\n");
}
add_string(" <style>\n");
add_string(" body {\n");
add_string(" margin: 0;\n");
add_string(" -webkit-text-size-adjust: none;\n");
add_string(" counter-reset: line-no;\n");
add_string(" background-color: ");
/* Convert color */
html_convert_color(COLOR_BG);
add_string("\n");
add_string(" }\n");
add_string(" .ul { text-decoration: underline; }\n");
for (int i = 0; i < 15; ++i) {
/* For each of the relevant flags... */
char tmp[20];
sprintf(tmp," .s%d { color: ", i);
add_string(tmp);
/* These are special */
if (i == FLAG_NOTICE) {
html_convert_color(COLOR_SEARCH_FG);
add_string(" background-color: ");
html_convert_color(COLOR_SEARCH_BG);
} else if (i == FLAG_ERROR) {
html_convert_color(COLOR_ERROR_FG);
add_string(" background-color: ");
html_convert_color(COLOR_ERROR_BG);
} else {
html_convert_color(flag_to_color(i));
}
add_string("}\n");
}
add_string(" pre {\n");
add_string(" margin: 0;\n");
add_string(" white-space: pre-wrap;\n");
add_string(" font-family: \"DejaVu Sans Mono\", Courier, monospace;\n");
add_string(" font-size: 10pt;\n");
add_string(" }\n");
add_string(" pre>span {\n");
add_string(" display: inline-block;\n");
add_string(" width: 100%;\n");
add_string(" }\n");
add_string(" pre>span>a::before {\n");
add_string(" counter-increment: line-no;\n");
add_string(" content: counter(line-no);\n");
add_string(" padding-right: 1em;\n");
add_string(" width: 3em;\n");
add_string(" display: inline-block;\n");
add_string(" text-align: right;\n");
add_string(" background-color: ");
html_convert_color(COLOR_NUMBER_BG);
add_string("\n");
add_string(" color: ");
html_convert_color(COLOR_NUMBER_FG);
add_string("\n");
add_string(" }\n");
add_string(" pre>span:target {\n");
add_string(" background-color: ");
html_convert_color(COLOR_ALT_BG);
add_string("\n");
add_string(" }\n");
add_string(" pre>span:target>a::before {\n");
add_string(" background-color: ");
html_convert_color(COLOR_NUMBER_FG);
add_string("\n");
add_string(" color: ");
html_convert_color(COLOR_NUMBER_BG);
add_string("\n");
add_string(" }\n");
for (int i = 1; i <= env->tabstop; ++i) {
char tmp[20];
sprintf(tmp, ".tab%d", i);
add_string(" ");
add_string(tmp);
add_string(">span {\n");
add_string(" display: inline-block;\n");
add_string(" overflow: hidden;\n");
add_string(" width: 0;\n");
add_string(" height: 0;\n");
add_string(" }\n");
add_string(" ");
add_string(tmp);
add_string("::after {\n");
add_string(" content: '»");
for (int j = 1; j < i; ++j) {
add_string("·");
}
add_string("';\n");
add_string(" background-color: ");
html_convert_color(COLOR_ALT_BG);
add_string("\n");
add_string(" color: ");
html_convert_color(COLOR_ALT_FG);
add_string("\n");
add_string(" }\n");
}
add_string(" .space {\n");
add_string(" border-left: 1px solid ");
html_convert_color(COLOR_ALT_FG);
add_string("\n");
add_string(" margin-left: -1px;\n");
add_string(" }\n");
add_string(" </style>\n");
add_string(" </head>\n");
add_string(" <body><pre>\n");
for (int i = 0; i < old->line_count; ++i) {
char tmp[100];
sprintf(tmp, "<span id=\"L%d\"><a href=\"#L%d\"></a>", i+1, i+1);
add_string(tmp);
int last_flag = -1;
int opened = 0;
int all_spaces = 1;
for (int j = 0; j < old->lines[i]->actual; ++j) {
char_t c = old->lines[i]->text[j];
if (c.codepoint != ' ') all_spaces = 0;
if (last_flag == -1 || last_flag != (c.flags & 0x1F)) {
if (opened) add_string("</span>");
opened = 1;
char tmp[100];
sprintf(tmp, "<span class=\"s%d%s\">",
c.flags & FLAG_MASK_COLORS,
(c.flags & FLAG_UNDERLINE) ? " ul" : "");
add_string(tmp);
last_flag = (c.flags & 0x1F);
}
if (c.codepoint == '<') {
add_string("<");
} else if (c.codepoint == '>') {
add_string(">");
} else if (c.codepoint == '&') {
add_string("&");
} else if (c.codepoint == '\t') {
char tmp[100];
sprintf(tmp, "<span class=\"tab%d\"><span> </span></span>",c.display_width);
add_string(tmp);
} else if (j > 0 && c.codepoint == ' ' && all_spaces && !(j % old->tabstop)) {
add_string("<span class=\"space\"> </span>");
} else {
char tmp[7] = {0}; /* Max six bytes, use 7 to ensure last is always nil */
to_eight(c.codepoint, tmp);
add_string(tmp);
}
}
if (opened) {
add_string("</span>");
} else {
add_string("<wbr>");
}
add_string("</span>\n");
}
add_string("</pre></body>\n");
add_string("</html>\n");
env->loading = 0;
env->modified = 1;
if (old->file_name) {
char * base = file_basename(old->file_name);
char * tmp = malloc(strlen(base) + 5);
*tmp = '\0';
strcat(tmp, base);
strcat(tmp, ".htm");
env->file_name = tmp;
}
for (int i = 0; i < env->line_count; ++i) {
recalculate_tabs(env->lines[i]);
}
env->syntax = match_syntax(".htm");
schedule_complete_recalc();
return 0;
}
/**
* Based on vim's :TOhtml
* Convert syntax-highlighted buffer contents to HTML.
*/
BIM_COMMAND(tohtml,"tohtml","Convert the document to an HTML representation with syntax highlighting.") {
convert_to_html();
redraw_all();
return 0;
}
BIM_ALIAS("TOhtml",tohtml,tohtml)
int _prefix_command_run_script(char * cmd) {
if (env->mode == MODE_LINE_SELECTION) {
int range_top, range_bot;
range_top = env->start_line < env->line_no ? env->start_line : env->line_no;
range_bot = env->start_line < env->line_no ? env->line_no : env->start_line;
int in[2];
pipe(in);
int out[2];
pipe(out);
int child = fork();
/* Open child process and set up pipes */
if (child == 0) {
FILE * dev_null = fopen("/dev/null","w"); /* for stderr */
close(out[0]);
close(in[1]);
dup2(out[1], STDOUT_FILENO);
dup2(in[0], STDIN_FILENO);
dup2(fileno(dev_null), STDERR_FILENO);
system(&cmd[1]); /* Yes we can just do this */
exit(1);
} else if (child < 0) {
render_error("Failed to fork");
return 1;
}
close(out[1]);
close(in[0]);
/* Write lines to child process */
FILE * f = fdopen(in[1],"w");
for (int i = range_top; i <= range_bot; ++i) {
line_t * line = env->lines[i-1];
for (int 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);
close(in[1]);
/* Read results from child process into a new buffer */
FILE * result = fdopen(out[0],"r");
buffer_t * old = env;
env = buffer_new();
setup_buffer(env);
env->loading = 1;
uint8_t buf[BLOCK_SIZE];
state = 0;
while (!feof(result) && !ferror(result)) {
size_t r = fread(buf, 1, BLOCK_SIZE, result);
add_buffer(buf, r);
}
if (env->line_no && env->lines[env->line_no-1] && env->lines[env->line_no-1]->actual == 0) {
env->lines = remove_line(env->lines, env->line_no-1);
}
fclose(result);
env->loading = 0;
/* Return to the original buffer and replace the selected lines with the output */
buffer_t * new = env;
env = old;
for (int i = range_top; i <= range_bot; ++i) {
/* Remove the existing lines */
env->lines = remove_line(env->lines, range_top-1);
}
for (int i = 0; i < new->line_count; ++i) {
/* Add the new lines */
env->lines = add_line(env->lines, range_top + i - 1);
replace_line(env->lines, range_top + i - 1, new->lines[i]);
recalculate_tabs(env->lines[range_top+i-1]);
}
env->modified = 1;
/* Close the temporary buffer */
buffer_close(new);
} else {
/* 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.");
int c;
while ((c = bim_getch(), c != ENTER_KEY && c != LINE_FEED));
/* Redraw the screen */
redraw_all();
}
/* Done processing command */
return 0;
}
int replace_text(int range_top, int range_bot, char divider, char * needle) {
char * c = needle;
char * replacement = NULL;
char * options = "";
while (*c) {
if (*c == divider) {
*c = '\0';
replacement = c + 1;
break;
}
c++;
}
if (!replacement) {
render_error("nothing to replace with");
return 1;
}
c = replacement;
while (*c) {
if (*c == divider) {
*c = '\0';
options = c + 1;
break;
}
c++;
}
int global = 0;
int case_insensitive = 0;
/* Parse options */
while (*options) {
switch (*options) {
case 'g':
global = 1;
break;
case 'i':
case_insensitive = 1;
break;
}
options++;
}
uint32_t * needle_c = malloc(sizeof(uint32_t) * (strlen(needle) + 1));
uint32_t * replacement_c = malloc(sizeof(uint32_t) * (strlen(replacement) + 1));
{
int i = 0;
uint32_t c, state = 0;
for (char * cin = needle; *cin; cin++) {
if (!decode(&state, &c, *cin)) {
needle_c[i] = c;
i++;
} else if (state == UTF8_REJECT) {
state = 0;
}
}
needle_c[i] = 0;
i = 0;
c = 0;
state = 0;
for (char * cin = replacement; *cin; cin++) {
if (!decode(&state, &c, *cin)) {
replacement_c[i] = c;
i++;
} else if (state == UTF8_REJECT) {
state = 0;
}
}
replacement_c[i] = 0;
}
int replacements = 0;
for (int line = range_top; line <= range_bot; ++line) {
int col = 0;
while (col != -1) {
perform_replacement(line, needle_c, replacement_c, col, case_insensitive, &col);
if (col != -1) replacements++;
if (!global) break;
}
}
free(needle_c);
free(replacement_c);
if (replacements) {
render_status_message("replaced %d instance%s of %s", replacements, replacements == 1 ? "" : "s", needle);
set_history_break();
redraw_text();
} else {
render_error("Pattern not found: %s", needle);
}
return 0;
}
BIM_PREFIX_COMMAND(repsome,"s","Perform a replacement over selected lines") {
int range_top, range_bot;
if (env->mode == MODE_LINE_SELECTION) {
range_top = env->start_line < env->line_no ? env->start_line : env->line_no;
range_bot = env->start_line < env->line_no ? env->line_no : env->start_line;
} else {
range_top = env->line_no;
range_bot = env->line_no;
}
return replace_text(range_top, range_bot, cmd[1], &cmd[2]);
}
BIM_PREFIX_COMMAND(repall,"%s","Perform a replacement over the entire file.") {
return replace_text(1, env->line_count, cmd[2], &cmd[3]);
}
BIM_COMMAND(e,"e","Open a file") {
if (argc > 1) {
/* This actually opens a new tab */
open_file(argv[1]);
update_title();
} else {
if (env->modified) {
render_error("File is modified, can not reload.");
return 1;
}
buffer_t * old_env = env;
open_file(env->file_name);
buffer_t * new_env = env;
env = old_env;
#define SWAP(T,a,b) do { T x = a; a = b; b = x; } while (0)
SWAP(line_t **, env->lines, new_env->lines);
SWAP(int, env->line_count, new_env->line_count);
SWAP(int, env->line_avail, new_env->line_avail);
SWAP(history_t *, env->history, new_env->history);
buffer_close(new_env); /* Should probably also free, this needs editing. */
schedule_complete_recalc();
redraw_all();
}
return 0;
}
BIM_COMMAND(tabnew,"tabnew","Open a new tab") {
if (argc > 1) {
open_file(argv[1]);
update_title();
} else {
env = buffer_new();
setup_buffer(env);
redraw_all();
update_title();
}
return 0;
}
BIM_COMMAND(w,"w","Write a file") {
/* w: write file */
if (argc > 1) {
write_file(argv[1]);
} else {
write_file(env->file_name);
}
return 0;
}
BIM_COMMAND(wq,"wq","Write and close buffer") {
write_file(env->file_name);
close_buffer();
return 0;
}
BIM_COMMAND(history,"history","Display command history") {
render_commandline_message(""); /* To clear command line */
for (int i = COMMAND_HISTORY_MAX; i > 1; --i) {
if (command_history[i-1]) render_commandline_message("%d:%s\n", i-1, command_history[i-1]);
}
render_commandline_message("\n");
redraw_tabbar();
redraw_commandline();
pause_for_key();
return 0;
}
BIM_COMMAND(q,"q","Close buffer") {
if (left_buffer && left_buffer == right_buffer) {
unsplit();
return 0;
}
if (env->modified) {
render_error("No write since last change. Use :q! to force exit.");
} else {
close_buffer();
}
update_title();
return 0;
}
BIM_COMMAND(qbang,"q!","Force close buffer") {
close_buffer();
update_title();
return 0;
}
BIM_COMMAND(qa,"qa","Try to close all buffers") {
try_quit();
return 0;
}
BIM_ALIAS("qall",qall,qa)
BIM_COMMAND(qabang,"qa!","Force exit") {
/* Forcefully exit editor */
while (buffers_len) {
buffer_close(buffers[0]);
}
quit(NULL);
return 1; /* doesn't return */
}
BIM_COMMAND(tabp,"tabp","Previous tab") {
previous_tab();
update_title();
return 0;
}
BIM_COMMAND(tabn,"tabn","Next tab") {
next_tab();
update_title();
return 0;
}
BIM_COMMAND(tabm,"tabm","Move the current tab to a new index") {
/* Figure out the current index */
int i = 0;
for (; i < buffers_len; i++) {
if (buffers[i] == env) break;
}
if (i == buffers_len) {
render_status_message("(invalid state?)");