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editor.c
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#include <unistd.h>
#include <signal.h>
#include <uthash.h>
#include <utlist.h>
#include <inttypes.h>
#include <fnmatch.h>
#define TB_IMPL
#include "termbox2.h"
#undef TB_IMPL
#include "mle.h"
#include "mlbuf.h"
static int _editor_set_macro_toggle_key(editor_t *editor, char *key);
static int _editor_bview_exists(editor_t *editor, bview_t *bview);
static int _editor_register_cmd_fn(editor_t *editor, char *name, int (*func)(cmd_context_t *ctx));
static int _editor_should_skip_rc(int argc, char **argv);
static int _editor_close_bview_inner(editor_t *editor, bview_t *bview, int *optret_num_closed);
static int _editor_destroy_cmd(editor_t *editor, cmd_t *cmd);
static int _editor_prompt_input_submit(cmd_context_t *ctx);
static int _editor_prompt_input_complete(cmd_context_t *ctx);
static prompt_history_t *_editor_prompt_find_or_add_history(cmd_context_t *ctx, prompt_hnode_t **optret_prompt_hnode);
static int _editor_prompt_history_up(cmd_context_t *ctx);
static int _editor_prompt_history_down(cmd_context_t *ctx);
static int _editor_prompt_history_append(cmd_context_t *ctx, char *data);
static int _editor_prompt_yna_all(cmd_context_t *ctx);
static int _editor_prompt_yn_yes(cmd_context_t *ctx);
static int _editor_prompt_yn_no(cmd_context_t *ctx);
static int _editor_prompt_cancel(cmd_context_t *ctx);
static int _editor_menu_submit(cmd_context_t *ctx);
static int _editor_menu_cancel(cmd_context_t *ctx);
static int _editor_prompt_isearch_next(cmd_context_t *ctx);
static int _editor_prompt_isearch_prev(cmd_context_t *ctx);
static int _editor_prompt_isearch_viewport_up(cmd_context_t *ctx);
static int _editor_prompt_isearch_viewport_down(cmd_context_t *ctx);
static int _editor_prompt_isearch_drop_cursors(cmd_context_t *ctx);
static void _editor_loop(editor_t *editor, loop_context_t *loop_ctx);
static int _editor_debug_key_input(void);
static void _editor_refresh_cmd_context(editor_t *editor, cmd_context_t *cmd_ctx);
static void _editor_notify_cmd_observers(cmd_context_t *ctx, int is_before);
static int _editor_maybe_toggle_macro(editor_t *editor, kinput_t *input);
static void _editor_resize(editor_t *editor, int w, int h);
static void _editor_maybe_lift_temp_anchors(cmd_context_t *ctx);
static void _editor_draw_cursors(editor_t *editor, bview_t *bview);
static void _editor_get_user_input(editor_t *editor, cmd_context_t *ctx);
static void _editor_ingest_paste(editor_t *editor, cmd_context_t *ctx);
static void _editor_handle_mouse(editor_t *editor, tb_event_t *ev);
static void _editor_append_pastebuf(editor_t *editor, cmd_context_t *ctx, kinput_t *input);
static void _editor_record_macro_input(kmacro_t *macro, kinput_t *input);
static cmd_t *_editor_get_command(editor_t *editor, cmd_context_t *ctx, kinput_t *opt_paste_input);
static kbinding_t *_editor_get_kbinding_node(kbinding_t *node, kinput_t *input, cmd_context_t *ctx, int is_paste, int *ret_is_numeric);
static cmd_t *_editor_resolve_cmd(editor_t *editor, cmd_t **rcmd, char *cmd_name);
static int _editor_key_to_input(char *key, kinput_t *ret_input);
static int _editor_event_to_key(struct tb_event *ev, char *ret_key);
static void _editor_init_signal_handlers(editor_t *editor);
static void _editor_continue(int signum);
static void _editor_graceful_exit(int signum);
static void _editor_register_cmds(editor_t *editor);
static void _editor_init_kmaps(editor_t *editor);
static void _editor_init_kmap(editor_t *editor, kmap_t **ret_kmap, char *name, char *default_cmd_name, int allow_fallthru, kbinding_def_t *defs);
static void _editor_init_kmap_add_binding(editor_t *editor, kmap_t *kmap, kbinding_def_t *binding_def);
static int _editor_init_kmap_add_binding_to_trie(kbinding_t **trie, char *cmd_name, char *cur_key_patt, char *full_key_patt, char *static_param);
static int _editor_init_kmap_by_str(editor_t *editor, kmap_t **ret_kmap, char *str);
static int _editor_init_kmap_add_binding_by_str(editor_t *editor, kmap_t *kmap, char *str);
static void _editor_destroy_kmap(kmap_t *kmap, kbinding_t *trie);
static int _editor_add_macro_by_str(editor_t *editor, char *str);
static void _editor_init_syntaxes(editor_t *editor);
static void _editor_init_syntax(editor_t *editor, syntax_t **optret_syntax, char *name, char *path_pattern, int tab_width, int tab_to_space, srule_def_t *defs);
static int _editor_init_syntax_by_str(editor_t *editor, syntax_t **ret_syntax, char *str);
static int _editor_init_syntax_add_rule(syntax_t *syntax, srule_def_t *def);
static int _editor_init_syntax_add_rule_by_str(syntax_t *syntax, char *str);
static void _editor_destroy_syntax_map(syntax_t *map);
static int _editor_init_from_rc_read(editor_t *editor, FILE *rc, char **ret_rc_data, size_t *ret_rc_data_len);
static int _editor_init_from_rc_exec(editor_t *editor, char *rc_path, char **ret_rc_data, size_t *ret_rc_data_len);
static int _editor_init_from_rc(editor_t *editor, FILE *rc, char *rc_path);
static int _editor_init_from_args(editor_t *editor, int argc, char **argv);
static void _editor_init_status(editor_t *editor);
static void _editor_init_bviews(editor_t *editor, int argc, char **argv);
static int _editor_init_headless_mode(editor_t *editor);
static int _editor_init_startup_macro(editor_t *editor);
static int _editor_init_term(editor_t *editor);
static void _editor_display_keys(editor_t *editor);
static void _editor_remember_keys(editor_t *editor, kinput_t *input);
// Init editor from args
int editor_init(editor_t *editor, int argc, char **argv) {
int rv;
FILE *rc;
char *home_rc;
rv = MLE_OK;
do {
// Create a resuable PCRE2 match data block. This is hacky / lazy. PCRE
// is used all over the place, even in places where there's no easy way
// to get at a shared state, e.g., mark.c. Also feels wasteful to keep
// reallocating this thing, so let's just create one with 10 match
// slots which is the most we ever use. Free in editor_deinit.
pcre2_md = pcre2_match_data_create(10, NULL);
// Set editor defaults
editor->is_in_init = 1;
editor->tab_width = MLE_DEFAULT_TAB_WIDTH;
editor->tab_to_space = MLE_DEFAULT_TAB_TO_SPACE;
editor->trim_paste = MLE_DEFAULT_TRIM_PASTE;
editor->auto_indent = MLE_DEFAULT_AUTO_INDENT;
editor->highlight_bracket_pairs = MLE_DEFAULT_HILI_BRACKET_PAIRS;
editor->read_rc_file = MLE_DEFAULT_READ_RC_FILE;
editor->soft_wrap = MLE_DEFAULT_SOFT_WRAP;
editor->coarse_undo = MLE_DEFAULT_COARSE_UNDO;
editor->viewport_scope_x = -4;
editor->viewport_scope_y = -1;
editor->color_col = -1;
editor->exit_code = EXIT_SUCCESS;
editor->headless_mode = isatty(STDIN_FILENO) == 0 ? 1 : 0;
_editor_set_macro_toggle_key(editor, MLE_DEFAULT_MACRO_TOGGLE_KEY);
// Init signal handlers
_editor_init_signal_handlers(editor);
// Register commands
_editor_register_cmds(editor);
// Init kmaps
_editor_init_kmaps(editor);
// Init syntaxes
_editor_init_syntaxes(editor);
// Parse rc files
if (!_editor_should_skip_rc(argc, argv)) {
home_rc = NULL;
if (getenv("HOME")) {
asprintf(&home_rc, "%s/%s", getenv("HOME"), ".mlerc");
if (util_is_file(home_rc, "rb", &rc)) {
rv = _editor_init_from_rc(editor, rc, home_rc);
fclose(rc);
}
free(home_rc);
}
if (rv != MLE_OK) break;
if (util_is_file("/etc/mlerc", "rb", &rc)) {
rv = _editor_init_from_rc(editor, rc, "/etc/mlerc");
fclose(rc);
}
if (rv != MLE_OK) break;
}
// Parse cli args
rv = _editor_init_from_args(editor, argc, argv);
if (rv != MLE_OK) break;
// Init status bar
_editor_init_status(editor);
// Init bviews
_editor_init_bviews(editor, argc, argv);
// Init startup macro
_editor_init_headless_mode(editor);
// Init headless mode
_editor_init_startup_macro(editor);
// Init terminal
rv = _editor_init_term(editor);
if (rv != MLE_OK) break;
} while (0);
editor->is_in_init = 0;
return rv;
}
// Run editor
int editor_run(editor_t *editor) {
loop_context_t loop_ctx;
memset(&loop_ctx, 0, sizeof(loop_context_t));
_editor_resize(editor, -1, -1);
if (editor->debug_key_input) {
return _editor_debug_key_input();
}
_editor_loop(editor, &loop_ctx);
if (editor->headless_mode && editor->active_edit) {
buffer_write_to_fd(editor->active_edit->buffer, STDOUT_FILENO, NULL);
}
if (editor->debug_dump_state_on_exit) {
editor_debug_dump(editor, stderr);
}
return MLE_OK;
}
// Deinit editor
int editor_deinit(editor_t *editor) {
bview_t *bview;
bview_t *bview_tmp1;
bview_t *bview_tmp2;
kmap_t *kmap;
kmap_t *kmap_tmp;
kmacro_t *macro;
kmacro_t *macro_tmp;
cmd_t *cmd;
cmd_t *cmd_tmp;
prompt_history_t *prompt_history;
prompt_history_t *prompt_history_tmp;
prompt_hnode_t *prompt_hnode;
prompt_hnode_t *prompt_hnode_tmp1;
prompt_hnode_t *prompt_hnode_tmp2;
observer_t *observer;
observer_t *observer_tmp;
if (editor->status) bview_destroy(editor->status);
CDL_FOREACH_SAFE2(editor->all_bviews, bview, bview_tmp1, bview_tmp2, all_prev, all_next) {
CDL_DELETE2(editor->all_bviews, bview, all_prev, all_next);
bview_destroy(bview);
}
HASH_ITER(hh, editor->kmap_map, kmap, kmap_tmp) {
HASH_DEL(editor->kmap_map, kmap);
_editor_destroy_kmap(kmap, kmap->bindings->children);
if (kmap->default_cmd_name) free(kmap->default_cmd_name);
free(kmap->bindings);
free(kmap->name);
free(kmap);
}
HASH_ITER(hh, editor->macro_map, macro, macro_tmp) {
HASH_DEL(editor->macro_map, macro);
if (macro->inputs) free(macro->inputs);
if (macro->name) free(macro->name);
free(macro);
}
HASH_ITER(hh, editor->cmd_map, cmd, cmd_tmp) {
HASH_DEL(editor->cmd_map, cmd);
_editor_destroy_cmd(editor, cmd);
}
HASH_ITER(hh, editor->prompt_history, prompt_history, prompt_history_tmp) {
HASH_DEL(editor->prompt_history, prompt_history);
free(prompt_history->prompt_str);
CDL_FOREACH_SAFE(prompt_history->prompt_hlist, prompt_hnode, prompt_hnode_tmp1, prompt_hnode_tmp2) {
CDL_DELETE(prompt_history->prompt_hlist, prompt_hnode);
free(prompt_hnode->data);
free(prompt_hnode);
}
free(prompt_history);
}
DL_FOREACH_SAFE(editor->observers, observer, observer_tmp) {
editor_destroy_observer(editor, observer);
}
if (editor->macro_record) {
if (editor->macro_record->inputs) free(editor->macro_record->inputs);
free(editor->macro_record);
}
_editor_destroy_syntax_map(editor->syntax_map);
if (editor->kmap_init_name) free(editor->kmap_init_name);
if (editor->insertbuf) free(editor->insertbuf);
if (editor->cut_buffer) free(editor->cut_buffer);
if (editor->ttyfd) close(editor->ttyfd);
if (editor->startup_macro_name) free(editor->startup_macro_name);
if (editor->macro_last) free(editor->macro_last);
pcre2_match_data_free(pcre2_md);
if (!editor->headless_mode) {
tb_shutdown();
}
return MLE_OK;
}
// Prompt user for input
int editor_prompt(editor_t *editor, char *prompt, editor_prompt_params_t *params, char **optret_answer) {
bview_t *bview_tmp;
loop_context_t loop_ctx;
memset(&loop_ctx, 0, sizeof(loop_context_t));
// Disallow nested prompts
if (editor->prompt) {
if (optret_answer) *optret_answer = NULL;
return MLE_ERR;
}
// Init loop_ctx
loop_ctx.invoker = editor->active;
loop_ctx.should_exit = 0;
loop_ctx.prompt_answer = NULL;
// Init prompt
editor_open_bview(editor, NULL, MLE_BVIEW_TYPE_PROMPT, NULL, 0, 1, 0, 0, NULL, &editor->prompt);
if (params && params->prompt_cb) bview_add_listener(editor->prompt, params->prompt_cb, params->prompt_cb_udata);
editor->prompt->prompt_str = prompt;
bview_push_kmap(editor->prompt, params && params->kmap ? params->kmap : editor->kmap_prompt_input);
// Insert data if present
if (params && params->data && params->data_len > 0) {
buffer_insert(editor->prompt->buffer, 0, params->data, params->data_len, NULL);
mark_move_eol(editor->prompt->active_cursor->mark);
}
// Loop inside prompt
_editor_loop(editor, &loop_ctx);
// Set answer
if (optret_answer) {
*optret_answer = loop_ctx.prompt_answer;
} else if (loop_ctx.prompt_answer) {
free(loop_ctx.prompt_answer);
loop_ctx.prompt_answer = NULL;
}
// Restore previous focus
bview_tmp = editor->prompt;
editor->prompt = NULL;
editor_close_bview(editor, bview_tmp, NULL);
editor_set_active(editor, loop_ctx.invoker);
return MLE_OK;
}
// A printf version of editor_prompt
int editor_prompt_fmt(editor_t *editor, editor_prompt_params_t *params, char **optret_answer, char *prompt_fmt, ...) {
char prompt[512];
va_list vl;
int rv;
va_start(vl, prompt_fmt);
rv = vsnprintf(prompt, sizeof(prompt), prompt_fmt, vl);
va_end(vl);
if (rv < 0 || rv >= (int)sizeof(prompt)) return MLE_ERR;
return editor_prompt(editor, prompt, params, optret_answer);
}
// Open dialog menu
int editor_menu(editor_t *editor, cmd_func_t callback, char *opt_buf_data, int opt_buf_data_len, aproc_t *opt_aproc, bview_t **optret_menu) {
bview_t *menu;
editor_open_bview(editor, NULL, MLE_BVIEW_TYPE_EDIT, NULL, 0, 1, 0, 0, NULL, &menu);
menu->is_menu = 1;
menu->soft_wrap = 0;
menu->menu_callback = callback;
bview_push_kmap(menu, editor->kmap_menu);
if (opt_aproc) {
aproc_set_owner(opt_aproc, menu, &(menu->aproc));
}
if (opt_buf_data) {
mark_insert_before(menu->active_cursor->mark, opt_buf_data, opt_buf_data_len);
}
if (optret_menu) *optret_menu = menu;
return MLE_OK;
}
// Open a bview
int editor_open_bview(editor_t *editor, bview_t *opt_parent, int type, char *opt_path, int opt_path_len, int make_active, bint_t linenum, int skip_resize, buffer_t *opt_buffer, bview_t **optret_bview) {
bview_t *bview;
bview_rect_t *rect;
int found;
found = 0;
// Check if already open and not dirty
if (opt_path) {
CDL_FOREACH2(editor->all_bviews, bview, all_next) {
if (bview->buffer
&& !bview->buffer->is_unsaved
&& bview->buffer->path
&& strlen(bview->buffer->path) == (size_t)opt_path_len
&& strncmp(opt_path, bview->buffer->path, opt_path_len) == 0
) {
found = 1;
break;
}
}
}
// Make new bview if not already open
if (!found) {
bview = bview_new(editor, type, opt_path, opt_path_len, opt_buffer);
CDL_APPEND2(editor->all_bviews, bview, all_prev, all_next);
if (!opt_parent) {
DL_APPEND2(editor->top_bviews, bview, top_prev, top_next);
} else {
opt_parent->split_child = bview;
}
}
if (make_active) {
editor_set_active(editor, bview);
}
if (!found && !editor->is_in_init && !skip_resize) {
switch (type) {
case MLE_BVIEW_TYPE_STATUS: rect = &editor->rect_status; break;
case MLE_BVIEW_TYPE_PROMPT: rect = &editor->rect_prompt; break;
default:
case MLE_BVIEW_TYPE_EDIT: rect = &editor->rect_edit; break;
}
bview_resize(bview, rect->x, rect->y, rect->w, rect->h);
}
if (linenum > 0) {
mark_move_to(bview->active_cursor->mark, linenum - 1, 0);
bview_center_viewport_y(bview);
}
if (optret_bview) {
*optret_bview = bview;
}
if (!found && opt_path && util_is_dir(opt_path)) {
// TODO This is hacky
cmd_context_t ctx;
memset(&ctx, 0, sizeof(cmd_context_t));
ctx.editor = editor;
ctx.static_param = opt_path;
ctx.bview = bview;
cmd_browse(&ctx);
editor_close_bview(editor, bview, NULL);
}
return MLE_OK;
}
// Close a bview
int editor_close_bview(editor_t *editor, bview_t *bview, int *optret_num_closed) {
int rc;
if (optret_num_closed) *optret_num_closed = 0;
if ((rc = _editor_close_bview_inner(editor, bview, optret_num_closed)) == MLE_OK) {
_editor_resize(editor, editor->w, editor->h);
}
return rc;
}
// Set the active bview
int editor_set_active(editor_t *editor, bview_t *bview) {
if (!_editor_bview_exists(editor, bview)) {
MLE_RETURN_ERR(editor, "No bview %p in editor->all_bviews", (void*)bview);
} else if (editor->prompt && editor->prompt != bview) {
MLE_RETURN_ERR(editor, "Cannot abandon prompt for bview %p", (void*)bview);
}
editor->active = bview;
if (MLE_BVIEW_IS_EDIT(bview)) {
editor->active_edit_last = editor->active_edit;
editor->active_edit = bview;
editor->active_edit_root = bview_get_split_root(bview);
}
bview_rectify_viewport(bview);
return MLE_OK;
}
// Print debug info
int editor_debug_dump(editor_t *editor, FILE *fp) {
bview_t *bview;
cursor_t *cursor;
buffer_t *buffer;
bline_t *bline;
bint_t c;
int bview_index;
int cursor_index;
bview_index = 0;
CDL_FOREACH2(editor->all_bviews, bview, all_next) {
if (!MLE_BVIEW_IS_EDIT(bview)) continue;
cursor_index = 0;
DL_FOREACH(bview->cursors, cursor) {
fprintf(fp, "bview.%d.cursor.%d.mark.line_index=%" PRIdMAX "\n", bview_index, cursor_index, cursor->mark->bline->line_index);
fprintf(fp, "bview.%d.cursor.%d.mark.col=%" PRIdMAX "\n", bview_index, cursor_index, cursor->mark->col);
if (cursor->is_anchored) {
fprintf(fp, "bview.%d.cursor.%d.anchor.line_index=%" PRIdMAX "\n", bview_index, cursor_index, cursor->anchor->bline->line_index);
fprintf(fp, "bview.%d.cursor.%d.anchor.col=%" PRIdMAX "\n", bview_index, cursor_index, cursor->anchor->col);
}
fprintf(fp, "bview.%d.cursor.%d.sel_rule=%c\n", bview_index, cursor_index, cursor->sel_rule ? 'y' : 'n');
cursor_index += 1;
}
fprintf(fp, "bview.%d.cursor_count=%d\n", bview_index, cursor_index);
buffer = bview->buffer;
fprintf(fp, "bview.%d.buffer.byte_count=%" PRIdMAX "\n", bview_index, buffer->byte_count);
fprintf(fp, "bview.%d.buffer.line_count=%" PRIdMAX "\n", bview_index, buffer->line_count);
fprintf(fp, "bview.%d.buffer.path=%s\n", bview_index, buffer->path ? buffer->path : "");
for (bline = buffer->first_line; bline != NULL; bline = bline->next) {
MLBUF_BLINE_ENSURE_CHARS(bline);
fprintf(fp, "bview.%d.buffer.blines.%" PRIdMAX ".chars=", bview_index, bline->line_index);
for (c = 0; c < bline->char_count; ++c) {
fprintf(fp, "<ch=%" PRIu32 " fg=%" PRIu16 " bg=%" PRIu16 ">",
bline->chars[c].ch,
bline->chars[c].style.fg,
bline->chars[c].style.bg
);
}
fprintf(fp, "\n");
}
fprintf(fp, "bview.%d.buffer.blines_end\n", bview_index);
fprintf(fp, "bview.%d.buffer.data_begin\n", bview_index);
buffer_write_to_file(buffer, fp, NULL);
fprintf(fp, "\nbview.%d.buffer.data_end\n", bview_index);
bview_index += 1;
}
fprintf(fp, "bview_count=%d\n", bview_index);
return MLE_OK;
}
// Invoke tb_set_input_mode appropriately
int editor_set_input_mode(editor_t *editor) {
int input_mode;
if (editor->headless_mode) {
return MLE_OK;
}
input_mode = TB_INPUT_ALT;
if (editor->mouse_support) {
input_mode |= TB_INPUT_MOUSE;
}
tb_set_input_mode(input_mode);
return MLE_OK;
}
// Set macro toggle key
static int _editor_set_macro_toggle_key(editor_t *editor, char *key) {
return _editor_key_to_input(key, &editor->macro_toggle_key);
}
// Return 1 if bview exists in editor, else return 0
static int _editor_bview_exists(editor_t *editor, bview_t *bview) {
bview_t *tmp;
CDL_FOREACH2(editor->all_bviews, tmp, all_next) {
if (tmp == bview) return 1;
}
return 0;
}
// Return number of EDIT bviews open
int editor_bview_edit_count(editor_t *editor) {
int count;
bview_t *bview;
count = 0;
CDL_FOREACH2(editor->all_bviews, bview, all_next) {
if (MLE_BVIEW_IS_EDIT(bview)) count += 1;
}
return count;
}
// Register a command
static int _editor_register_cmd_fn(editor_t *editor, char *name, int (*func)(cmd_context_t *ctx)) {
cmd_t cmd = {0};
cmd.name = name;
cmd.func = func;
return editor_register_cmd(editor, &cmd);
}
// Register a command (extended)
int editor_register_cmd(editor_t *editor, cmd_t *cmd) {
cmd_t *existing_cmd;
cmd_t *new_cmd;
HASH_FIND_STR(editor->cmd_map, cmd->name, existing_cmd);
if (existing_cmd) return MLE_ERR;
new_cmd = calloc(1, sizeof(cmd_t));
*new_cmd = *cmd;
new_cmd->name = strdup(new_cmd->name);
HASH_ADD_KEYPTR(hh, editor->cmd_map, new_cmd->name, strlen(new_cmd->name), new_cmd);
return MLE_OK;
}
// Get input from either macro or user
int editor_get_input(editor_t *editor, loop_context_t *loop_ctx, cmd_context_t *ctx) {
ctx->is_user_input = 0;
if (editor->macro_apply
&& editor->macro_apply_input_index < editor->macro_apply->inputs_len
) {
// Get input from macro
MLE_KINPUT_COPY(ctx->input, editor->macro_apply->inputs[editor->macro_apply_input_index]);
editor->macro_apply_input_index += 1;
} else {
// Get input from user
if (editor->macro_apply) {
// Clear macro if present
editor->macro_apply = NULL;
editor->macro_apply_input_index = 0;
}
if (editor->headless_mode) {
// Bail if in headless mode
loop_ctx->should_exit = 1;
return MLE_ERR;
} else {
// Get input from user
_editor_get_user_input(editor, ctx);
ctx->is_user_input = 1;
}
}
if (editor->is_recording_macro && editor->macro_record) {
// Record macro input
_editor_record_macro_input(editor->macro_record, &ctx->input);
}
// Remember keys for display
if (editor->debug_display_keys) _editor_remember_keys(editor, &ctx->input);
return MLE_OK;
}
// Display the editor
int editor_display(editor_t *editor) {
bview_t *bview;
if (editor->headless_mode) return MLE_OK;
tb_clear();
bview_draw(editor->active_edit_root);
bview_draw(editor->status);
if (editor->prompt) bview_draw(editor->prompt);
DL_FOREACH2(editor->top_bviews, bview, top_next) {
_editor_draw_cursors(editor, bview);
}
if (editor->debug_display_keys) _editor_display_keys(editor);
tb_present();
return MLE_OK;
}
// Register a cmd observer
int editor_register_observer(editor_t *editor, char *event_patt, void *udata, observer_func_t fn_callback, observer_t **optret_observer) {
observer_t *observer;
observer = calloc(1, sizeof(observer_t));
observer->event_patt = strdup(event_patt);
observer->callback = fn_callback;
observer->udata = udata;
DL_APPEND(editor->observers, observer);
if (optret_observer) *optret_observer = observer;
return MLE_OK;
}
// Register a cmd observer
int editor_destroy_observer(editor_t *editor, observer_t *observer) {
DL_DELETE(editor->observers, observer);
free(observer->event_patt);
free(observer);
return MLE_OK;
}
// Close a bview
static int _editor_close_bview_inner(editor_t *editor, bview_t *bview, int *optret_num_closed) {
if (!_editor_bview_exists(editor, bview)) {
MLE_RETURN_ERR(editor, "No bview %p in editor->all_bviews", (void*)bview);
}
if (bview->split_child) {
_editor_close_bview_inner(editor, bview->split_child, optret_num_closed);
}
if (bview->split_parent) {
bview->split_parent->split_child = NULL;
editor_set_active(editor, bview->split_parent);
} else if (bview == editor->active_edit) {
if (bview->all_prev && bview->all_prev != bview && MLE_BVIEW_IS_EDIT(bview->all_prev)) {
editor_set_active(editor, bview->all_prev);
} else if (bview->all_next && bview->all_next != bview && MLE_BVIEW_IS_EDIT(bview->all_next)) {
editor_set_active(editor, bview->all_next);
} else {
editor_open_bview(editor, NULL, MLE_BVIEW_TYPE_EDIT, NULL, 0, 1, 0, 0, NULL, NULL);
}
}
if (!bview->split_parent) {
DL_DELETE2(editor->top_bviews, bview, top_prev, top_next);
}
if (bview->all_next && bview->all_prev) {
CDL_DELETE2(editor->all_bviews, bview, all_prev, all_next);
}
bview_destroy(bview);
if (optret_num_closed) *optret_num_closed += 1;
return MLE_OK;
}
// Destroy a command
static int _editor_destroy_cmd(editor_t *editor, cmd_t *cmd) {
(void)editor;
free(cmd->name);
free(cmd);
return MLE_OK;
}
// Invoked when user hits enter in a prompt_input
static int _editor_prompt_input_submit(cmd_context_t *ctx) {
bint_t answer_len;
char *answer;
buffer_get(ctx->bview->buffer, &answer, &answer_len);
ctx->loop_ctx->prompt_answer = strndup(answer, answer_len);
_editor_prompt_history_append(ctx, ctx->loop_ctx->prompt_answer);
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Invoke when user hits tab in a prompt_input
static int _editor_prompt_input_complete(cmd_context_t *ctx) {
loop_context_t *loop_ctx;
char *cmd;
char *cmd_arg;
char *terms;
size_t terms_len;
int num_terms;
char *term;
int term_index;
loop_ctx = ctx->loop_ctx;
// Update tab_complete_term and tab_complete_index
if (loop_ctx->last_cmd_ctx.cmd && loop_ctx->last_cmd_ctx.cmd->func == _editor_prompt_input_complete) {
loop_ctx->tab_complete_index += 1;
} else if (ctx->bview->buffer->first_line->data_len < MLE_LOOP_CTX_MAX_COMPLETE_TERM_SIZE) {
snprintf(
loop_ctx->tab_complete_term,
MLE_LOOP_CTX_MAX_COMPLETE_TERM_SIZE,
"%.*s",
(int)ctx->bview->buffer->first_line->data_len,
ctx->bview->buffer->first_line->data
);
loop_ctx->tab_complete_index = 0;
} else {
return MLE_OK;
}
// Assemble compgen command
cmd_arg = util_escape_shell_arg(
loop_ctx->tab_complete_term,
strlen(loop_ctx->tab_complete_term)
);
asprintf(&cmd, "compgen -f %s 2>/dev/null | sort", cmd_arg);
// Run compgen command
terms = NULL;
terms_len = 0;
util_shell_exec(ctx->editor, cmd, 1, NULL, 0, 0, "bash", &terms, &terms_len, NULL);
free(cmd);
free(cmd_arg);
// Get number of terms
// TODO valgrind thinks there's an error here
num_terms = 0;
term = strchr(terms, '\n');
while (term) {
num_terms += 1;
term = strchr(term + 1, '\n');
}
// Bail if no terms
if (num_terms < 1) {
free(terms);
return MLE_OK;
}
// Determine term index
term_index = loop_ctx->tab_complete_index % num_terms;
// Set prompt input to term
term = strtok(terms, "\n");
while (term != NULL) {
if (term_index == 0) {
buffer_set(ctx->bview->buffer, term, strlen(term));
mark_move_eol(ctx->cursor->mark);
break;
} else {
term_index -= 1;
}
term = strtok(NULL, "\n");
}
free(terms);
return MLE_OK;
}
// Find or add a prompt history entry for the current prompt
static prompt_history_t *_editor_prompt_find_or_add_history(cmd_context_t *ctx, prompt_hnode_t **optret_prompt_hnode) {
prompt_history_t *prompt_history;
HASH_FIND_STR(ctx->editor->prompt_history, ctx->bview->prompt_str, prompt_history);
if (!prompt_history) {
prompt_history = calloc(1, sizeof(prompt_history_t));
prompt_history->prompt_str = strdup(ctx->bview->prompt_str);
HASH_ADD_KEYPTR(hh, ctx->editor->prompt_history, prompt_history->prompt_str, strlen(prompt_history->prompt_str), prompt_history);
}
if (!ctx->loop_ctx->prompt_hnode) {
ctx->loop_ctx->prompt_hnode = prompt_history->prompt_hlist
? prompt_history->prompt_hlist->prev
: NULL;
}
if (optret_prompt_hnode) {
*optret_prompt_hnode = ctx->loop_ctx->prompt_hnode;
}
return prompt_history;
}
// Prompt history up
static int _editor_prompt_history_up(cmd_context_t *ctx) {
prompt_hnode_t *prompt_hnode;
_editor_prompt_find_or_add_history(ctx, &prompt_hnode);
if (prompt_hnode) {
ctx->loop_ctx->prompt_hnode = prompt_hnode->prev;
buffer_set(ctx->buffer, prompt_hnode->data, prompt_hnode->data_len);
}
return MLE_OK;
}
// Prompt history down
static int _editor_prompt_history_down(cmd_context_t *ctx) {
prompt_hnode_t *prompt_hnode;
_editor_prompt_find_or_add_history(ctx, &prompt_hnode);
if (prompt_hnode) {
ctx->loop_ctx->prompt_hnode = prompt_hnode->next;
buffer_set(ctx->buffer, prompt_hnode->data, prompt_hnode->data_len);
}
return MLE_OK;
}
// Prompt history append
static int _editor_prompt_history_append(cmd_context_t *ctx, char *data) {
prompt_history_t *prompt_history;
prompt_hnode_t *prompt_hnode;
prompt_history = _editor_prompt_find_or_add_history(ctx, NULL);
prompt_hnode = calloc(1, sizeof(prompt_hnode_t));
prompt_hnode->data = strdup(data);
prompt_hnode->data_len = (bint_t)strlen(data);
CDL_APPEND(prompt_history->prompt_hlist, prompt_hnode);
return MLE_OK;
}
// Invoked when user hits a in a prompt_yna
static int _editor_prompt_yna_all(cmd_context_t *ctx) {
ctx->loop_ctx->prompt_answer = MLE_PROMPT_ALL;
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Invoked when user hits y in a prompt_yn(a)
static int _editor_prompt_yn_yes(cmd_context_t *ctx) {
ctx->loop_ctx->prompt_answer = MLE_PROMPT_YES;
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Invoked when user hits n in a prompt_yn(a)
static int _editor_prompt_yn_no(cmd_context_t *ctx) {
ctx->loop_ctx->prompt_answer = MLE_PROMPT_NO;
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Invoked when user cancels (Ctrl-C) a prompt_(input|yn), or hits any key in a prompt_ok
static int _editor_prompt_cancel(cmd_context_t *ctx) {
ctx->loop_ctx->prompt_answer = NULL;
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Invoked when user hits enter in a menu
static int _editor_menu_submit(cmd_context_t *ctx) {
if (ctx->bview->menu_callback) return ctx->bview->menu_callback(ctx);
return MLE_OK;
}
// Invoked when user hits C-c in a menu
static int _editor_menu_cancel(cmd_context_t *ctx) {
if (ctx->bview->aproc) aproc_destroy(ctx->bview->aproc, 1);
return MLE_OK;
}
// Invoked when user hits down in a prompt_isearch
static int _editor_prompt_isearch_next(cmd_context_t *ctx) {
if (ctx->editor->active_edit->isearch_rule) {
mark_move_next_cre_nudge(ctx->editor->active_edit->active_cursor->mark, ctx->editor->active_edit->isearch_rule->cre);
bview_center_viewport_y(ctx->editor->active_edit);
}
return MLE_OK;
}
// Invoked when user hits up in a prompt_isearch
static int _editor_prompt_isearch_prev(cmd_context_t *ctx) {
if (ctx->editor->active_edit->isearch_rule) {
mark_move_prev_cre(ctx->editor->active_edit->active_cursor->mark, ctx->editor->active_edit->isearch_rule->cre);
bview_center_viewport_y(ctx->editor->active_edit);
}
return MLE_OK;
}
// Invoked when user hits up in a prompt_isearch
static int _editor_prompt_isearch_viewport_up(cmd_context_t *ctx) {
return bview_set_viewport_y(ctx->editor->active_edit, ctx->editor->active_edit->viewport_mark->bline->line_index - 5, 0);
}
// Invoked when user hits up in a prompt_isearch
static int _editor_prompt_isearch_viewport_down(cmd_context_t *ctx) {
return bview_set_viewport_y(ctx->editor->active_edit, ctx->editor->active_edit->viewport_mark->bline->line_index + 5, 0);
}
// Drops a cursor on each isearch match
static int _editor_prompt_isearch_drop_cursors(cmd_context_t *ctx) {
bview_t *bview;
mark_t *mark;
pcre2_code *cre;
cursor_t *orig_cursor;
cursor_t *last_cursor;
bint_t nchars;
bview = ctx->editor->active_edit;
if (!bview->isearch_rule) return MLE_OK;
orig_cursor = bview->active_cursor;
mark = bview->active_cursor->mark;
cre = bview->isearch_rule->cre;
mark_move_beginning(mark);
last_cursor = NULL;
while (mark_move_next_cre_ex(mark, cre, NULL, NULL, &nchars) == MLBUF_OK) {
bview_add_cursor(bview, mark->bline, mark->col, &last_cursor);
mark_move_by(mark, MLE_MAX(1, nchars));
}
if (last_cursor) {
mark_join(orig_cursor->mark, last_cursor->mark);
bview_remove_cursor(bview, last_cursor);
}
bview->active_cursor = orig_cursor;
bview_center_viewport_y(bview);
ctx->loop_ctx->prompt_answer = NULL;
ctx->loop_ctx->should_exit = 1;
return MLE_OK;
}
// Run editor loop
static void _editor_loop(editor_t *editor, loop_context_t *loop_ctx) {
cmd_t *cmd;
cmd_context_t cmd_ctx;
// Increment loop_depth
editor->loop_depth += 1;
// Init cmd_context
memset(&cmd_ctx, 0, sizeof(cmd_context_t));
cmd_ctx.editor = editor;
cmd_ctx.loop_ctx = loop_ctx;
// Loop until editor should exit
while (!loop_ctx->should_exit) {
// Set loop_ctx
editor->loop_ctx = loop_ctx;
// Display editor
if (!editor->is_display_disabled) {
editor_display(editor);
}
// Bail if debug_exit_after_startup set
if (editor->debug_exit_after_startup) {
break;
}
// Check for async io
// aproc_drain_all will bail and return 0 if there's any tty data
if (editor->aprocs && aproc_drain_all(editor->aprocs, &editor->ttyfd)) {
continue;
}
// Get input
if (editor_get_input(editor, loop_ctx, &cmd_ctx) == MLE_ERR) {
break;
}
// Toggle macro?
if (_editor_maybe_toggle_macro(editor, &cmd_ctx.input)) {
continue;
}
if ((cmd = _editor_get_command(editor, &cmd_ctx, NULL)) != NULL) {
// Found cmd in kmap trie, now execute
cmd_ctx.cmd = cmd;
if (cmd_ctx.is_user_input && cmd->func == cmd_insert_data) {
// Ingest user paste
_editor_ingest_paste(editor, &cmd_ctx);
} else if (cmd->func == cmd_repeat && loop_ctx->last_cmd_ctx.cmd) {
// Repeat last command
memcpy(&cmd_ctx, &loop_ctx->last_cmd_ctx, sizeof(cmd_ctx));
}
// Notify cmd:*:before observers
_editor_notify_cmd_observers(&cmd_ctx, 1);
// Refresh cmd ctx if observers changed anything
_editor_refresh_cmd_context(editor, &cmd_ctx);
// Execute cmd
cmd_ctx.cmd->func(&cmd_ctx);
// Lift any temp anchors
_editor_maybe_lift_temp_anchors(&cmd_ctx);
// Notify cmd:*:after observers
_editor_notify_cmd_observers(&cmd_ctx, 0);
// Copy cmd_ctx to last_cmd_ctx
memcpy(&loop_ctx->last_cmd_ctx, &cmd_ctx, sizeof(cmd_ctx));
loop_ctx->binding_node = NULL;
cmd_ctx.wildcard_params_len = 0;
cmd_ctx.numeric_params_len = 0;
cmd_ctx.pastebuf_len = 0;
} else if (loop_ctx->need_more_input) {
// Need more input to find
} else {
// Not found, bad command
loop_ctx->binding_node = NULL;
}
}
// Free stuff
if (cmd_ctx.pastebuf) free(cmd_ctx.pastebuf);
str_free(&loop_ctx->last_insert);
if (loop_ctx->input_trail) free(loop_ctx->input_trail);
loop_ctx->input_trail_len = 0;
loop_ctx->input_trail_cap = 0;
// Decrement loop_depth
editor->loop_depth -= 1;
}
// Run debug routine to show key names as they input
static int _editor_debug_key_input(void) {
char key[MLE_MAX_KEYNAME_LEN + 1];
struct tb_event ev;
int y, h;
y = 0;
h = tb_height();
tb_print(0, y++, 0, 0, "_editor_debug_key_input: Press q to quit.");