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/* Cache of styled source file text
Copyright (C) 2018-2019 Free Software Foundation, Inc.
This file is part of GDB.
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 3 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/>. */
#ifndef SOURCE_CACHE_H
#define SOURCE_CACHE_H
/* This caches highlighted source text, keyed by the source file's
full name. A size-limited LRU cache is used.
Highlighting depends on the GNU Source Highlight library. When not
available, this cache will fall back on reading plain text from the
appropriate file. */
class source_cache
{
public:
source_cache ()
{
}
/* Get the source text for the source file in symtab S. FIRST_LINE
and LAST_LINE are the first and last lines to return; line
numbers are 1-based. If the file cannot be read, false is
returned. Otherwise, LINES_OUT is set to the desired text. The
returned text may include ANSI terminal escapes. */
bool get_source_lines (struct symtab *s, int first_line,
int last_line, std::string *lines_out);
/* Remove all the items from the source cache. */
void clear ()
{
m_source_map.clear ();
}
private:
/* One element in the cache. */
struct source_text
{
/* The full name of the file. */
std::string fullname;
/* The contents of the file. */
std::string contents;
};
/* A helper function for get_source_lines that is used when the
source lines are not highlighted. The arguments and return value
are as for get_source_lines. */
bool get_plain_source_lines (struct symtab *s, int first_line,
int last_line, std::string *lines_out);
/* A helper function for get_plain_source_lines that extracts the
desired source lines from TEXT, putting them into LINES_OUT. The
arguments are as for get_source_lines. The return value is the
desired lines. */
std::string extract_lines (const struct source_text &text, int first_line,
int last_line);
/* The contents of the cache. */
std::vector<source_text> m_source_map;
};
/* The global source cache. */
extern source_cache g_source_cache;
#endif /* SOURCE_CACHE_H */
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