139 lines
3.5 KiB
C++
139 lines
3.5 KiB
C++
/*
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* Copyright (c) 2003-2007, 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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#ifndef _FORMAT_H
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#define _FORMAT_H
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#include "xpath.h"
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namespace ledger {
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class format_t
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{
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public:
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struct element_t
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{
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bool align_left;
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short min_width;
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short max_width;
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enum kind_t { UNKNOWN, TEXT, COLUMN, XPATH, GROUP } kind;
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union {
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string * chars;
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xml::xpath_t * xpath;
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format_t * format;
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};
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element_t()
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: align_left(false), min_width(-1), max_width(-1),
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kind(UNKNOWN), chars(NULL) {
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TRACE_CTOR(element_t, "");
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}
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~element_t() {
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TRACE_DTOR(element_t);
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switch (kind) {
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case TEXT:
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checked_delete(chars);
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break;
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case XPATH:
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checked_delete(xpath);
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break;
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case GROUP:
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checked_delete(format);
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break;
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default:
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assert(! chars);
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break;
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}
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}
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private:
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element_t(const element_t& other);
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};
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struct element_formatter_t {
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virtual ~element_formatter_t() {}
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virtual int operator()(std::ostream& out, element_t * element,
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xml::node_t * context, int column) const;
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};
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string format_string;
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std::list<element_t *> elements;
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private:
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format_t(const format_t&);
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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& fmt) {
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TRACE_CTOR(format_t, "const string&");
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parse(fmt);
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}
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void clear_elements() {
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for (std::list<element_t *>::iterator i = elements.begin();
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i != elements.end();
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i++)
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checked_delete(*i);
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elements.clear();
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}
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virtual ~format_t() {
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TRACE_DTOR(format_t);
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clear_elements();
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}
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void parse(const string& fmt);
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void compile(const string& fmt, xml::node_t * context = NULL) {
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parse(fmt);
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compile(context);
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}
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void compile(xml::node_t * context = NULL);
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int format(std::ostream& out, xml::node_t * context = NULL,
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int column = 0, const element_formatter_t& formatter =
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element_formatter_t()) const;
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operator bool() const {
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return ! format_string.empty();
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}
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};
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DECLARE_EXCEPTION(format_error);
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} // namespace ledger
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#endif // _FORMAT_H
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