cwidget 0.5.18
fragment_cache.h
1// fragment_cache.h -*-c++-*-
2//
3// Copyright (C) 2005 Daniel Burrows
4//
5// This program is free software; you can redistribute it and/or
6// modify it under the terms of the GNU General Public License as
7// published by the Free Software Foundation; either version 2 of
8// the License, or (at your option) any later version.
9//
10// This program is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13// General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with this program; see the file COPYING. If not, write to
17// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18// Boston, MA 02111-1307, USA.
19//
20// A special fragment class that caches its contents.
21
22#ifndef FRAGMENT_CACHE_H
23#define FRAGMENT_CACHE_H
24
25#include "fragment.h"
26
27namespace cwidget
28{
35 {
36 fragment *contents;
37
39 mutable fragment_contents cached_lines;
40
42 mutable style cached_lines_style;
43
47 mutable size_t cached_lines_first_width, cached_lines_rest_width;
48
50 mutable size_t cached_max_width;
51
53 mutable size_t cached_max_width_first_indent, cached_max_width_rest_indent;
54
56 mutable size_t cached_trailing_width;
57
59 mutable size_t cached_trailing_width_first_indent, cached_trailing_width_rest_indent;
60
62 mutable bool cached_final_nl:1;
63
65 mutable bool cached_lines_valid:1, cached_max_width_valid:1;
67 mutable bool cached_trailing_width_valid:1, cached_final_nl_valid:1;
68 public:
69 fragment_cache(fragment *_contents);
71
72 void invalidate();
73
74 fragment_contents layout(size_t firstw, size_t restw,
75 const style &st);
76
77 void set_attr(int attr);
78
79 size_t max_width(size_t first_indent, size_t rest_indent) const;
80 size_t trailing_width(size_t first_indent, size_t rest_indent) const;
81
82 bool final_newline() const;
83 };
84}
85
86#endif
A fragment that caches its contents; a cached result is used if the same width is passed to the layou...
Definition: fragment_cache.h:35
fragment_contents layout(size_t firstw, size_t restw, const style &st)
Return all the lines of this fragment, given the "shape" of the fragment.
Definition: fragment_cache.cc:42
size_t max_width(size_t first_indent, size_t rest_indent) const
Definition: fragment_cache.cc:60
size_t trailing_width(size_t first_indent, size_t rest_indent) const
Definition: fragment_cache.cc:75
bool final_newline() const
Definition: fragment_cache.cc:90
This class represents the formatted contents of a fragment.
Definition: fragment_contents.h:31
A fragment represents a logical unit of text.
Definition: fragment.h:38
A "style" is a setting to be applied to a display element (widget, text, etc).
Definition: style.h:52
The namespace containing everything defined by cwidget.
Definition: columnify.cc:28