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bim.c
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bim.c
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/* 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 & 0xF;
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:
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;
}