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/**
* @file
* Colour and attributes
*
* @authors
* Copyright (C) 2021 Richard Russon <rich@flatcap.org>
*
* @copyright
* This program 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, either version 2 of the License, or (at your option) any later
* version.
*
* This program 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/>.
*/
/**
* @page color_attr Colour and attributes
*
* The colour and attributes of a graphical object are represented by an
* AttrColor.
*/
#include "config.h"
#include <stddef.h>
#include <stdint.h>
#include "mutt/lib.h"
#include "attr.h"
#include "curses2.h"
#include "debug.h"
/**
* attr_color_clear - Free the contents of an AttrColor
* @param ac AttrColor to empty
*
* @note The AttrColor object isn't freed
*/
void attr_color_clear(struct AttrColor *ac)
{
if (!ac)
return;
if (ac->curses_color)
color_debug(LL_DEBUG5, "clear %p\n", (void *) ac);
curses_color_free(&ac->curses_color);
ac->attrs = 0;
}
/**
* attr_color_free - Free an AttrColor
* @param ptr AttrColor to free
*/
void attr_color_free(struct AttrColor **ptr)
{
if (!ptr || !*ptr)
return;
struct AttrColor *ac = *ptr;
if (ac->ref_count > 1)
{
ac->ref_count--;
*ptr = NULL;
return;
}
attr_color_clear(ac);
FREE(ptr);
}
/**
* attr_color_new - Create a new AttrColor
* @retval ptr New AttrColor
*/
struct AttrColor *attr_color_new(void)
{
struct AttrColor *ac = mutt_mem_calloc(1, sizeof(*ac));
ac->ref_count = 1;
return ac;
}
/**
* attr_color_list_clear - Free the contents of an AttrColorList
* @param acl List to clear
*
* Free each of the AttrColors in a list.
*
* @note The list object isn't freed, only emptied
*/
void attr_color_list_clear(struct AttrColorList *acl)
{
if (!acl)
return;
struct AttrColor *ac = NULL;
struct AttrColor *tmp = NULL;
TAILQ_FOREACH_SAFE(ac, acl, entries, tmp)
{
TAILQ_REMOVE(acl, ac, entries);
attr_color_free(&ac);
}
}
/**
* attr_color_list_find - Find an AttrColor in a list
* @param acl List to search
* @param fg Foreground colour
* @param bg Background colour
* @param attrs Attributes, e.g. A_UNDERLINE
* @retval ptr Matching AttrColor
*/
struct AttrColor *attr_color_list_find(struct AttrColorList *acl, uint32_t fg,
uint32_t bg, int attrs)
{
if (!acl)
return NULL;
struct AttrColor *ac = NULL;
TAILQ_FOREACH(ac, acl, entries)
{
if (ac->attrs != attrs)
continue;
struct CursesColor *cc = ac->curses_color;
if (!cc)
continue;
if ((cc->fg == fg) && (cc->bg == bg))
return ac;
}
return NULL;
}
/**
* attr_color_copy - Copy a colour
* @param ac Colour to copy
* @retval obj Copy of the colour
*/
struct AttrColor attr_color_copy(const struct AttrColor *ac)
{
struct AttrColor copy = { 0 };
if (ac)
copy = *ac;
return copy;
}
/**
* attr_color_is_set - Is the object coloured?
* @param ac Colour to check
* @retval true Yes, a 'color' command has been used on this object
*/
bool attr_color_is_set(const struct AttrColor *ac)
{
if (!ac)
return false;
return ((ac->attrs != 0) || ac->curses_color);
}
/**
* attr_color_match - Do the colours match?
* @param ac1 First colour
* @param ac2 Second colour
* @retval true The colours and attributes match
*/
bool attr_color_match(struct AttrColor *ac1, struct AttrColor *ac2)
{
if ((!ac1) ^ (!ac2)) // One is set, but not the other
return false;
if (!ac1) // Two empty colours match
return true;
return ((ac1->curses_color == ac2->curses_color) && (ac1->attrs == ac2->attrs));
}
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