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#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "shed.h"
int shed_append(struct shed *e)
{
e->count = 1;
shed_move_forward(e);
return shed_insert(e);
}
int shed_append_end(struct shed *e)
{
shed_move_end(e);
return shed_insert(e);
}
int shed_backspace(struct shed *e)
{
int count = e->count ? e->count : 1;
for (int i = 0; i < count; i++) {
shed_remove_char(e->cur, 0);
}
return 1;
}
int shed_cancel(struct shed *e)
{
struct buffer *b = e->cur;
write(STDOUT_FILENO, "^C\n", 3);
b->nread = 0;
return 0;
}
int shed_change(struct shed *e)
{
shed_delete_toend(e);
return shed_append_end(e);
}
int shed_comment(struct shed *e)
{
shed_move_cursor(e->cur, -e->cur->pos);
shed_insert_char(e->cur, '#');
return 0;
}
int shed_convert_case(struct shed *e)
{
char *b = e->cur->buf;
size_t pos = e->cur->pos;
int count = e->count ? e->count : 1;
/* TODO: don't overflow */
for (int i = 0; i < count && pos + i < (size_t)e->cur->nread; i++) {
if (isupper(b[pos + i])) {
shed_replace_char(e->cur, tolower(b[pos + i]));
} else if (islower(b[pos + i])) {
shed_replace_char(e->cur, toupper(b[pos + i]));
} else {
shed_replace_char(e->cur, b[pos + i]);
}
}
return 1;
}
int shed_delete(struct shed *e)
{
int count = e->count ? e->count : 1;
for (int i = 0; i < count; i++) {
shed_remove_char(e->cur, 1);
}
return 1;
}
int shed_delete_toend(struct shed *e)
{
while (e->cur->pos < (size_t)e->cur->nread) {
shed_remove_char(e->cur, 1);
}
return 1;
}
int shed_eof(struct shed *e)
{
struct buffer *b = e->cur;
if (b->nread == 0) {
b->buf[0] = CTRL_D;
b->nread = 1;
return 0;
}
return 1;
}
int shed_erase(struct shed *e)
{
struct buffer *b = e->cur;
while (b->pos != 0) {
shed_remove_char(b, 0);
}
return 1;
}
int shed_execute(struct shed *e)
{
struct buffer *b = e->cur;
b->pos = b->nread;
//shed_insert_char(b, '\n');
write(STDOUT_FILENO, "\n", 1);
if (e->handle == shed_handle_edit) {
e->handle = shed_handle_insert;
}
return 0;
}
int shed_insert(struct shed *e)
{
e->handle = shed_handle_insert;
return 1;
}
int shed_insert_beginning(struct shed *e)
{
shed_move_0(e);
return shed_insert(e);
}
int shed_redraw(struct shed *e)
{
system("tput clear"); // TODO: pfork() and cache the output
write(STDOUT_FILENO, e->prompt, strlen(e->prompt));
write(STDOUT_FILENO, e->cur->buf, e->cur->nread);
int move = e->cur->nread - e->cur->pos;
e->cur->pos = e->cur->nread;
shed_move_cursor(e->cur, -move);
return 1;
}
int shed_replace(struct shed *e)
{
e->handle = shed_handle_replace;
return 1;
}
int shed_start_over(struct shed *e)
{
shed_move_0(e);
return shed_change(e);
}
int shed_worderase(struct shed *e)
{
struct buffer *b = e->cur;
while (b->pos != 0 && (isblank(b->buf[b->pos - 1]) || ispunct(b->buf[b->pos - 1]))) {
shed_remove_char(b, 0);
}
while (b->pos != 0 && !(isspace(b->buf[b->pos - 1]) || ispunct(b->buf[b->pos - 1]))) {
shed_remove_char(b, 0);
}
return 1;
}
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