// heditor: A hexadecimal editor widget
//
// This widget basically holds a view for a data source. The controller is the
// source API.

#pragma once
#include "source.h"
#include <justui/defs.h>
#include <justui/jwidget.h>
#include <gint/display.h>

/* heditor: Hexadecimal editor

   Events:
   * HEDITOR_CHANGED when the view changes due to scroll or a file change. This
     does *not* include cursor changes that don't scroll. */
typedef struct {
    jwidget widget;

    /* Current data source. We don't own the source */
    source_t *source;
    /* Current scroll offset, in bytes */
    int scroll;
    /* Current cursor position in source, in bytes */
    int cursor;
    /* Current insertion mode (false=overwrite, true=insert) */
    bool insert;
    /* Number of visible lines */
    int8_t visible_lines;
    /* Number of bytes printed per line */
    int8_t bytes_per_line;
    /* Additional spacing between lines, in pixels */
    int8_t line_spacing;
    /* Rendering font */
    font_t const *font;

} heditor;

/* Type IDs */
extern uint16_t HEDITOR_CHANGED;

/* heditor_create(): Create a new editor
   Initially there is no data source, so most features are disabled. */
heditor *heditor_create(jwidget *parent);

/* Switch the source. The old source is not freed by the editor. */
void heditor_set_source(heditor *e, source_t *source);

/* Scroll to the requested cursor position. */
bool heditor_move_to(heditor *e, int offset);

/* Change the insertion mode; true for insertion, false for overwrite. If the
   source doesn't support insertion, this function is a no-op. */
void heditor_set_insert_mode(heditor *e, bool insert);

/* Trivial properties */
void heditor_set_font(heditor *e, font_t const *font);
void heditor_set_line_spacing(heditor *e, int line_spacig);
void heditor_set_bytes_per_lines(heditor *e, int bytes_per_line);