Internal header for ncurses UI backend. This header defines internal structures and functions used by the ncurses implementation of the UI backend. It should not be included directly by external code. More...

#include "../include/ui_backend.h"
#include <cm.h>
#include <ncursesw/ncurses.h>
#include <ncursesw/panel.h>
#include <stdbool.h>

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Data Structures
struct	UiRuntime
	Opaque structure representing the UI runtime environment. More...
struct	UiSurface
	Opaque structure representing a drawable surface in the UI. More...

Macros
#define	XLEN 256

Functions
int	ui_bkgrnd (UiSurface , const UiStyle , const char *)
int	ui_bkgrnd_set (UiSurface , const UiStyle , const char *)
int	ui_ncurses_color_pair_from_style (const UiStyle *style)
	Convert an RGB value (0-255) to a 1000-based value for ncurses.Ncurses uses a 1000-based color system, so we need to convert our 0-255 RGB values to that scale.
int	ui_ncurses_style_apply (WINDOW win, const UiStyle style)
	Apply a UiStyle to an ncurses window.This function sets the appropriate attributes (bold, underline, reverse) on the given ncurses window based on the properties of the UiStyle.
void	ui_style_destroy (UiStyle *)
UiStyle *	ui_style_from_cch (const cchar_t *)
UiStyle *	ui_style_new ()
cchar_t	ui_style_to_cch (const UiStyle , const char )

Detailed Description

Internal header for ncurses UI backend. This header defines internal structures and functions used by the ncurses implementation of the UI backend. It should not be included directly by external code.

Definition in file ui_ncurses_internal.h.

Macro Definition Documentation

◆ XLEN

#define XLEN 256

Definition at line 18 of file ui_ncurses_internal.h.

Function Documentation

◆ ui_bkgrnd()

int ui_bkgrnd	(	UiSurface *	,
		const UiStyle *	,
		const char *	)

Definition at line 330 of file ui_ncurses.c.

                                                                 {
    if (!s)
        return -1;
    cchar_t cch = ui_style_to_cch(style, c);
    wbkgrnd(s->win, &cch);
    return 0;
}

◆ ui_bkgrnd_set()

int ui_bkgrnd_set	(	UiSurface *	,
		const UiStyle *	,
		const char *	)

Definition at line 338 of file ui_ncurses.c.

                                                                     {
    if (!s)
        return -1;
    cchar_t cch = ui_style_to_cch(style, c);
    wbkgrndset(s->win, &cch);
    return 0;
}

References ui_style_to_cch(), and UiSurface::win.

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◆ ui_style_destroy()

void ui_style_destroy ( UiStyle * )

Definition at line 387 of file ui_ncurses.c.

                                      {
    if (!style)
        return;
    free(style);
}

◆ ui_style_from_cch()

UiStyle * ui_style_from_cch ( const cchar_t * )

Definition at line 345 of file ui_ncurses.c.

                                               {
    UiStyle *style = calloc(1, sizeof(*style));
    if (!style)
        return NULL;
    wchar_t wc[2] = {L'\0', L'\0'};
    attr_t attrs;
    short cpx;
    int fg, bg;
    RGB rgb;
    getcchar(cch, wc, &attrs, &cpx, nullptr);
    style->bold = (attrs & WA_BOLD) != 0;
    style->dim = (attrs & WA_DIM) != 0;
    style->italic = (attrs & WA_ITALIC) != 0;
    style->underline = (attrs & WA_UNDERLINE) != 0;
    style->blink = (attrs & WA_BLINK) != 0;
    style->reverse = (attrs & WA_REVERSE) != 0;
    style->invis = (attrs & WA_INVIS) != 0;
    extended_pair_content(cpx, &fg, &bg);
    extended_color_content(fg, &rgb.r, &rgb.g, &rgb.b);
    style->fg.r = (rgb.r * 255) / 1000;
    style->fg.g = (rgb.g * 255) / 1000;
    style->fg.b = (rgb.b * 255) / 1000;
    extended_color_content(bg, &rgb.r, &rgb.g, &rgb.b);
    style->bg.r = (rgb.r * 255) / 1000;
    style->bg.g = (rgb.g * 255) / 1000;
    style->bg.b = (rgb.b * 255) / 1000;
    return style;
}

References RGB::b, UiStyle::bg, UiStyle::blink, UiStyle::bold, UiStyle::dim, UiStyle::fg, RGB::g, UiStyle::invis, UiStyle::italic, RGB::r, UiStyle::reverse, and UiStyle::underline.

◆ ui_style_new()

UiStyle * ui_style_new ( )

Definition at line 374 of file ui_ncurses.c.

                        {
    UiStyle *style = calloc(1, sizeof(*style));
    if (!style)
        return NULL;
    style->fg.r = 255;
    style->fg.g = 255;
    style->fg.b = 255;
    style->bg.r = 0;
    style->bg.g = 0;
    style->bg.b = 0;
    return style;
}

References UiStyle::bg, and UiStyle::fg.

◆ ui_style_to_cch()

cchar_t ui_style_to_cch	(	const UiStyle *	,
		const char *	)

Definition at line 393 of file ui_ncurses.c.

                                                             {
    int fg, bg;
    attr_t attrs = 0;
    uint32_t cpx = 0;
    mbstate_t mbstate;
    memset(&mbstate, 0, sizeof(mbstate));
    attrs |= style->bold ? WA_BOLD : 0;
    attrs |= style->dim ? WA_DIM : 0;
    attrs |= style->italic ? WA_ITALIC : 0;
    attrs |= style->underline ? WA_UNDERLINE : 0;
    attrs |= style->blink ? WA_BLINK : 0;
    attrs |= style->reverse ? WA_REVERSE : 0;
    attrs |= style->invis ? WA_INVIS : 0;
    RGB rgb = (RGB){style->fg.r, style->fg.g, style->fg.b};
    fg = rgb_to_curses_clr(&rgb);
    rgb = (RGB){style->bg.r, style->bg.g, style->bg.b};
    bg = rgb_to_curses_clr(&rgb);
    cpx = get_clr_pair(fg, bg);
    const cchar_t cch = mkcc(cpx, attrs, c);
    return cch;
}

References UiStyle::bg, UiStyle::blink, UiStyle::bold, UiStyle::dim, UiStyle::fg, get_clr_pair(), UiStyle::invis, UiStyle::italic, mkcc(), UiStyle::reverse, rgb_to_curses_clr(), and UiStyle::underline.

Referenced by ui_bkgrnd(), and ui_bkgrnd_set().