158 lines
3.8 KiB
C++
158 lines
3.8 KiB
C++
/*
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* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @addtogroup expr
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*/
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/**
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* @file format.h
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* @author John Wiegley
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*
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* @ingroup expr
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*
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* @brief Brief
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*
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* Long.
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*/
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#ifndef _FORMAT_H
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#define _FORMAT_H
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#include "expr.h"
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namespace ledger {
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class unistring;
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DECLARE_EXCEPTION(format_error, std::runtime_error);
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/**
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* @brief Brief
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*
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* Long.
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*/
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class format_t : public noncopyable
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{
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struct element_t : public supports_flags<>, public noncopyable
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{
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#define ELEMENT_ALIGN_LEFT 0x01
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enum kind_t {
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STRING,
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EXPR,
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};
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kind_t type;
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std::size_t min_width;
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std::size_t max_width;
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string chars;
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expr_t expr;
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scoped_ptr<struct element_t> next;
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element_t() throw()
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: supports_flags<>(), type(STRING), min_width(0), max_width(0) {
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TRACE_CTOR(element_t, "");
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}
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~element_t() throw() {
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TRACE_DTOR(element_t);
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}
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friend inline void mark_red(std::ostream& out, const element_t * elem) {
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out.setf(std::ios::left);
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out.width(0);
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out << "\e[31m";
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if (elem->has_flags(ELEMENT_ALIGN_LEFT))
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out << std::left;
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else
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out << std::right;
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if (elem->min_width > 0)
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out.width(elem->min_width);
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}
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void dump(std::ostream& out) const;
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};
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string format_string;
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scoped_ptr<element_t> elements;
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public:
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enum elision_style_t {
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TRUNCATE_TRAILING,
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TRUNCATE_MIDDLE,
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TRUNCATE_LEADING,
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ABBREVIATE
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};
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private:
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static element_t * parse_elements(const string& fmt);
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public:
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format_t() {
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TRACE_CTOR(format_t, "");
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}
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format_t(const string& _format) {
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TRACE_CTOR(format_t, "const string&");
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parse(_format);
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}
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~format_t() {
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TRACE_DTOR(format_t);
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}
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void parse(const string& _format) {
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elements.reset(parse_elements(_format));
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format_string = _format;
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}
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void format(std::ostream& out, scope_t& scope);
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void dump(std::ostream& out) const {
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for (const element_t * elem = elements.get();
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elem;
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elem = elem->next.get())
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elem->dump(out);
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}
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static string truncate(const unistring& str, std::size_t width,
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const int account_abbrev_length = -1);
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};
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#define FMT_PREFIX "fmt_"
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#define FMT_PREFIX_LEN 4
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#define WANT_FMT() \
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(std::strncmp(p, FMT_PREFIX, FMT_PREFIX_LEN) == 0)
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} // namespace ledger
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#endif // _FORMAT_H
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