// vtext: A text visualization widget
//
// This is a trivial widget, just displays line-by-line with or without line
// wrapping.

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

/* Wrapping modes */
typedef enum {
    VTEXT_WRAP_NONE,
    VTEXT_WRAP_CHAR,
    VTEXT_WRAP_WORD,

} vtext_wrap;

/* vtext: Text visualization widget */
typedef struct {
    jwidget widget;

    /* Current data block and size */
    char const *data;
    int size;
    /* Word wrapping mode */
    vtext_wrap wrap;
    /* Current scroll offset, in bytes */
    int scroll;
    /* Current horizontal offset, in pixels */
    int horiz_scroll;

    /* Number of virtual lines (depends on wrapping mode) */
    int virtual_lines;
    /* Maximum scroll */
    int max_scroll;
    /* Virtual line offsets */
    uint32_t *vline_offsets;

    /* Number of visible lines */
    int8_t visible_lines;
    /* Additional spacing between lines, in pixels */
    int8_t line_spacing;
    /* Rendering font */
    font_t const *font;

} vtext;

/* Type IDs */
extern uint16_t VTEXT_CHANGED;

/* vtext_create: Create a new text visualizer */
vtext *vtext_create(jwidget *parent);

/* Set a new data source. The viewer does not own the data. */
void vtext_set_source(vtext *t, char const *data, int size);

/* Scroll to a given (top) virtual line position. */
bool vtext_scroll_to(vtext *t, int top_vline);

/* Search a string and go to the next occurrence. */
bool vtext_scroll_to_substring(vtext *t, char const *substring);

/* Trivial properties */
void vtext_set_font(vtext *e, font_t const *font);
void vtext_set_line_spacing(vtext *e, int line_spacing);
void vtext_set_word_wrapping(vtext *e, vtext_wrap word_wrapping);