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/*
* Copyright (c) 2003-2023, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @addtogroup expr
*/
/**
* @file format.h
* @author John Wiegley
*
* @ingroup expr
*/
#pragma once
#include "expr.h"
#include "unistring.h"
#include <boost/smart_ptr/scoped_ptr.hpp>
namespace ledger {
class unistring;
DECLARE_EXCEPTION(format_error, std::runtime_error);
class format_t : public expr_base_t<string>, public noncopyable
{
typedef expr_base_t<string> base_type;
struct element_t : public flags::supports_flags<>, public noncopyable
{
#define ELEMENT_ALIGN_LEFT 0x01
enum kind_t { STRING, EXPR };
kind_t type;
std::size_t min_width;
std::size_t max_width;
variant<string, expr_t> data;
scoped_ptr<struct element_t> next;
element_t() throw()
: supports_flags<>(), type(STRING), min_width(0), max_width(0) {
TRACE_CTOR(element_t, "");
}
~element_t() throw() {
TRACE_DTOR(element_t);
}
element_t& operator=(const element_t& elem) {
if (this != &elem) {
supports_flags<>::operator=(elem);
type = elem.type;
min_width = elem.min_width;
max_width = elem.max_width;
data = elem.data;
}
return *this;
}
friend inline void mark_red(std::ostream& out, const element_t * elem) {
out.setf(std::ios::left);
out.width(0);
out << "\033[31m";
if (elem->has_flags(ELEMENT_ALIGN_LEFT))
out << std::left;
else
out << std::right;
if (elem->min_width > 0)
out.width(static_cast<std::streamsize>(elem->min_width));
}
void dump(std::ostream& out) const;
};
scoped_ptr<element_t> elements;
public:
static enum elision_style_t {
TRUNCATE_TRAILING,
TRUNCATE_MIDDLE,
TRUNCATE_LEADING,
ABBREVIATE
} default_style;
static bool default_style_changed;
private:
static element_t * parse_elements(const string& fmt,
const optional<format_t&>& tmpl);
public:
format_t() : base_type() {
TRACE_CTOR(format_t, "");
}
format_t(const string& _str, scope_t * context = NULL)
: base_type(context) {
if (! _str.empty())
parse_format(_str);
TRACE_CTOR(format_t, "const string&");
}
virtual ~format_t() {
TRACE_DTOR(format_t);
}
void parse_format(const string& _format,
const optional<format_t&>& tmpl = none) {
elements.reset(parse_elements(_format, tmpl));
set_text(_format);
}
virtual void mark_uncompiled() {
for (element_t * elem = elements.get(); elem; elem = elem->next.get()) {
if (elem->type == element_t::EXPR) {
expr_t& expr(boost::get<expr_t>(elem->data));
expr.mark_uncompiled();
}
}
}
virtual result_type real_calc(scope_t& scope);
virtual void dump(std::ostream& out) const {
for (const element_t * elem = elements.get();
elem;
elem = elem->next.get())
elem->dump(out);
}
static string truncate(const unistring& str,
const std::size_t width,
const std::size_t account_abbrev_length = 0);
};
} // namespace ledger
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