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/*
* Copyright 2020 Michael Drake <tlsa@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file
* NetSurf UI colours (implementation).
*
* Builds common colours used throughout NetSurf's interface.
*/
#include <stdio.h>
#include <assert.h>
#include <stddef.h>
#include <stdbool.h>
#include "netsurf/plot_style.h"
#include "utils/errors.h"
#include "utils/nscolour.h"
#include "desktop/system_colour.h"
colour nscolours[NSCOLOUR__COUNT];
/**
* Set some colours up from a couple of system colour entries.
*
* \param[in] name_bg Name of choices string for background colour lookup.
* \param[in] name_fg Name of choices string for foreground colour lookup.
* \param[in] bg_num Numerator for background adjustment ratio.
* \param[in] bg_den Denominator for backfground adjustment ratio.
* \param[out] bg Returns the background colour.
* \param[out] bg_hover Returns the hovered background colour.
* \param[out] fg Returns the foreground colour.
* \param[out] fg_subtle Returns the subtle foreground colour.
* \param[out] fg_faded Returns the faded foreground colour.
* \param[out] fg_good Returns the good foreground colour.
* \param[out] fg_bad Returns the bad foreground colour.
* \param[out] border Returns the border colour.
*/
static nserror nscolour__get(
const char *name_bg,
const char *name_fg,
unsigned bg_num,
unsigned bg_den,
colour *bg,
colour *bg_hover,
colour *fg,
colour *fg_subtle,
colour *fg_faded,
colour *fg_good,
colour *fg_bad,
colour *border)
{
nserror res;
bool dark_mode;
colour bg_temp;
assert(name_bg != NULL);
assert(name_fg != NULL);
assert(bg != NULL);
assert(fg != NULL);
res = ns_system_colour_char(name_bg, &bg_temp);
if (res != NSERROR_OK) {
return res;
}
res = ns_system_colour_char(name_fg, fg);
if (res != NSERROR_OK) {
return res;
}
*bg = mix_colour(bg_temp, *fg, 255 * bg_num / bg_den);
dark_mode = colour_lightness(*fg) > colour_lightness(*bg);
if (bg_hover != NULL) {
*bg_hover = dark_mode ?
half_lighten_colour(*bg) :
half_darken_colour(*bg);
}
if (fg_subtle != NULL) {
*fg_subtle = mix_colour(*fg, *bg, 255 * 25 / 32);
}
if (fg_faded != NULL) {
*fg_faded = mix_colour(*fg, *bg, 255 * 20 / 32);
}
if (fg_good != NULL) {
*fg_good = colour_engorge_component(*fg, !dark_mode,
PLOT_COLOUR_COMPONENT_GREEN);
}
if (fg_bad != NULL) {
*fg_bad = colour_engorge_component(*fg, !dark_mode,
PLOT_COLOUR_COMPONENT_RED);
}
if (border != NULL) {
*border = mix_colour(*fg, bg_temp, 255 * 8 / 32);
}
return NSERROR_OK;
}
/* Exported interface, documented in utils/nscolour.h */
nserror nscolour_update(void)
{
nserror res;
res = nscolour__get("Window", "WindowText", 16, 16,
&nscolours[NSCOLOUR_WIN_EVEN_BG],
&nscolours[NSCOLOUR_WIN_EVEN_BG_HOVER],
&nscolours[NSCOLOUR_WIN_EVEN_FG],
&nscolours[NSCOLOUR_WIN_EVEN_FG_SUBTLE],
&nscolours[NSCOLOUR_WIN_EVEN_FG_FADED],
&nscolours[NSCOLOUR_WIN_EVEN_FG_GOOD],
&nscolours[NSCOLOUR_WIN_EVEN_FG_BAD],
&nscolours[NSCOLOUR_WIN_EVEN_BORDER]);
if (res != NSERROR_OK) {
return res;
}
res = nscolour__get("Window", "WindowText", 15, 16,
&nscolours[NSCOLOUR_WIN_ODD_BG],
&nscolours[NSCOLOUR_WIN_ODD_BG_HOVER],
&nscolours[NSCOLOUR_WIN_ODD_FG],
&nscolours[NSCOLOUR_WIN_ODD_FG_SUBTLE],
&nscolours[NSCOLOUR_WIN_ODD_FG_FADED],
&nscolours[NSCOLOUR_WIN_ODD_FG_GOOD],
&nscolours[NSCOLOUR_WIN_ODD_FG_BAD],
&nscolours[NSCOLOUR_WIN_ODD_BORDER]);
if (res != NSERROR_OK) {
return res;
}
res = nscolour__get("Highlight", "HighlightText", 16, 16,
&nscolours[NSCOLOUR_SEL_BG],
NULL,
&nscolours[NSCOLOUR_SEL_FG],
&nscolours[NSCOLOUR_SEL_FG_SUBTLE],
NULL,
NULL,
NULL,
NULL);
if (res != NSERROR_OK) {
return res;
}
res = ns_system_colour_char("Scrollbar",
&nscolours[NSCOLOUR_SCROLL_WELL]);
if (res != NSERROR_OK) {
return res;
}
res = nscolour__get("ButtonFace", "ButtonText", 16, 16,
&nscolours[NSCOLOUR_BUTTON_BG],
NULL,
&nscolours[NSCOLOUR_BUTTON_FG],
NULL,
NULL,
NULL,
NULL,
NULL);
if (res != NSERROR_OK) {
return res;
}
return NSERROR_OK;
}
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