merged.c File Reference

Merged colours. More...

#include "config.h"
#include <stddef.h>
#include <stdbool.h>
#include <stdint.h>
#include "mutt/lib.h"
#include "attr.h"
#include "color.h"
#include "curses2.h"
#include "debug.h"

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Functions
void	merged_colors_init (void)
	Initialise the Merged colours. More...
void	merged_colors_clear (void)
	Free the list of Merged colours. More...
struct AttrColor *	merged_colors_find (int fg, int bg, int attrs)
	Find a Merged colour. More...
struct AttrColor *	merged_color_overlay (struct AttrColor *base, struct AttrColor *over)
	Combine two colours. More...

Variables
struct AttrColorList	MergedColors
	Array of user colours. More...

Detailed Description

Merged colours.

Authors

• Richard Russon

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/.

Definition in file merged.c.

Function Documentation

merged_colors_init()

void merged_colors_init

(

void

)

Initialise the Merged colours.

Definition at line 46 of file merged.c.

{
  TAILQ_INIT(&MergedColors);
}

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merged_colors_clear()

void merged_colors_clear

(

void

)

Free the list of Merged colours.

Definition at line 54 of file merged.c.

{
  struct AttrColor *ac = NULL;
  struct AttrColor *tmp = NULL;
 
  TAILQ_FOREACH_SAFE(ac, &MergedColors, entries, tmp)
  {
    TAILQ_REMOVE(&MergedColors, ac, entries);
    curses_color_free(&ac->curses_color);
    FREE(&ac);
  }
}

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merged_colors_find()

struct AttrColor * merged_colors_find	(	int	fg,
		int	bg,
		int	attrs
	)

Find a Merged colour.

Parameters

fg	Foreground colour
bg	Background colour
attrs	Attributes, e.g. A_UNDERLINE

Return values

ptr	Matching Merged colour

Definition at line 74 of file merged.c.

{
  struct AttrColor *ac = NULL;
  TAILQ_FOREACH(ac, &MergedColors, entries)
  {
    if (ac->attrs != attrs)
      continue;
 
    bool has_color = (fg != COLOR_DEFAULT) || (bg != COLOR_DEFAULT);
    struct CursesColor *cc = ac->curses_color;
 
    // Both have only attributes
    if (!has_color && !cc)
      return ac;
 
    // One has colour, but not the other
    if ((has_color && !cc) || (!has_color && cc))
      continue;
 
    if ((cc->fg == fg) && (cc->bg == bg))
      return ac;
  }
  return NULL;
}

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merged_color_overlay()

struct AttrColor * merged_color_overlay	(	struct AttrColor *	base,
		struct AttrColor *	over
	)

Combine two colours.

Parameters

base	Base colour
over	Overlay colour

Return values

ptr	Merged colour

If either the foreground or background of the overlay is 'default', then the base colour will show through. The attributes of both base and overlay will be OR'd together.

Definition at line 109 of file merged.c.

{
  if (!over || (!over->curses_color && (over->attrs == 0)))
    return base;
  if (!base || (!base->curses_color && (base->attrs == 0)))
    return over;
 
  struct CursesColor *cc_base = base->curses_color;
  struct CursesColor *cc_over = over->curses_color;
 
  uint32_t fg = COLOR_DEFAULT;
  uint32_t bg = COLOR_DEFAULT;
 
  if (cc_over)
  {
    fg = cc_over->fg;
    bg = cc_over->bg;
  }
 
  if (cc_base)
  {
    if (fg == COLOR_DEFAULT)
      fg = cc_base->fg;
    if (bg == COLOR_DEFAULT)
      bg = cc_base->bg;
  }
 
  int attrs = base->attrs | over->attrs;
 
  struct AttrColor *ac = merged_colors_find(fg, bg, attrs);
  if (ac)
    return ac;
 
  ac = attr_color_new();
  ac->curses_color = curses_color_new(fg, bg);
  ac->attrs = attrs;
  TAILQ_INSERT_TAIL(&MergedColors, ac, entries);
  merged_colors_dump();
 
  return ac;
}

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Variable Documentation

MergedColors

struct AttrColorList MergedColors

Array of user colours.

Definition at line 41 of file merged.c.