117 lines
2.1 KiB
C++
117 lines
2.1 KiB
C++
#ifndef _FORMAT_H
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#define _FORMAT_H
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#include "xpath.h"
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#include "error.h"
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#include "debug.h"
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#include <list>
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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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delete chars;
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break;
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case XPATH:
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delete xpath;
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break;
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case GROUP:
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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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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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class format_error : public error {
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public:
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format_error(const string& reason, error_context * ctxt = NULL) throw()
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: error(reason, ctxt) {}
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virtual ~format_error() throw() {}
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};
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} // namespace ledger
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#endif // _FORMAT_H
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