/*
-This file is part of the visor text editor and text editor framework
+visor - lightweight system-independent text editor and framework
Copyright (C) 2019 John Tsiombikas <nuclear@member.fsf.org>
This program is free software: you can redistribute it and/or modify
typedef long vi_addr;
typedef long vi_motion;
+typedef void vi_file;
struct visor;
struct vi_buffer;
struct vi_span {
- vi_addr beg, end;
+ vi_addr start;
+ unsigned long size;
+ int src;
};
enum vi_motdir {
void *(*realloc)(void*, unsigned long); /* can be null, will use malloc/free */
};
+/* open flags (same as POSIX O_*) */
+enum { VI_RDONLY, VI_WRONLY, VI_RDWR, VI_CREAT = 0x100 };
+/* seek origin (same as C SEEK_*) */
+enum { VI_SEEK_SET, VI_SEEK_CUR, VI_SEEK_END };
+
+
struct vi_fileops {
- void *(*open)(const char *path);
- long (*size)(void *file);
- void (*close)(void *file);
- void *(*map)(void *file);
- void (*unmap)(void *file);
- long (*read)(void *file, void *buf, long count);
- long (*write)(void *file, void *buf, long count);
- long (*seek)(void *file, long offs, int whence);
+ vi_file *(*open)(const char *path, unsigned int flags);
+ long (*size)(vi_file *file);
+ void (*close)(vi_file *file);
+ void *(*map)(vi_file *file);
+ void (*unmap)(vi_file *file);
+ long (*read)(vi_file *file, void *buf, long count);
+ long (*write)(vi_file *file, void *buf, long count);
+ long (*seek)(vi_file *file, long offs, int whence);
};
struct vi_ttyops {
void vi_destroy(struct visor *vi);
void vi_set_fileops(struct visor *vi, struct vi_fileops *fop);
+void vi_set_ttyops(struct visor *vi, struct vi_ttyops *tty);
/* vi_new_buf creates a new buffer and inserts it in the buffer list. If the
* path pointer is null, the new buffer will be empty, otherwise it's as if it
int vi_num_buf(struct visor *vi);
struct vi_buffer *vi_getcur_buf(struct visor *vi);
-int vi_setcur_buf(struct visor *vi, struct vi_buffer *vb);
+void vi_setcur_buf(struct visor *vi, struct vi_buffer *vb);
struct vi_buffer *vi_next_buf(struct visor *vi);
struct vi_buffer *vi_prev_buf(struct visor *vi);
+/* reset a buffer to the newly created state, freeing all resources */
+void vi_buf_reset(struct vi_buffer *vb);
+
/* Read a file into the buffer.
* Returns 0 on success, -1 on failure.
*/
int vi_buf_write(struct vi_buffer *vb, const char *path);
long vi_buf_size(struct vi_buffer *vb);
+/* find the span which corresponds to the specified text position
+ * if soffs is not null, the relative offset of the specified address from the
+ * start of the span is stored there.
+ */
+struct vi_span *vi_buf_find_span(struct vi_buffer *vb, vi_addr at, vi_addr *soffs);
+const char *vi_buf_span_text(struct vi_buffer *vb, struct vi_span *span);
+
void vi_buf_ins_begin(struct vi_buffer *vb, vi_motion mot);
void vi_buf_insert(struct vi_buffer *vb, char *s);
void vi_buf_ins_end(struct vi_buffer *vb);