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/**
* C++ Implementation: textstyle
*
* Description:
*
* Author: Lorenzo Bettini <http://www.lorenzobettini.it>, (C) 2005
* Copyright: See COPYING file that comes with this distribution
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "textstyle.h"
#include <sstream>
using namespace std;
namespace srchilite {
static SubstitutionMapping substitutionmapping;
TextStyle::TextStyle(const string &s,const char **vars) : repr((s.size() ? s : TEXT_VAR_TEXT)),
invalid(true)
{
ostringstream exp_buff;
exp_buff << "\\$(style|text";
if (vars) {
int i = 0;
while (vars[i]) {
exp_buff << "|" << vars[i];
++i;
}
}
exp_buff << ")";
var_exp = boost::regex(exp_buff.str());
}
TextStyle::~TextStyle()
{
}
/**
* The parts vector contains the string repr split in parts: those that
* constant parts and those that represent $text and $style variables.
* For instance, if repr == "<span class=\"$style\">$text</span>", then we
* have:
*
* - parts[0] == "<span class=\""
* - parts[1] == ""
* - parts[2] == "\">"
* - parts[3] == ""
* - parts[4] == "</span>"
*
* Then style_substitutions contains the index(es) of parts corresponding to
* $style variable occurrences that will be substituted with values
* and text_substitutions is the same but for $text occurrences. Thus, in this
* case:
*
* - style_substitutions[0] = 1
* - text_substitutions[0] = 3
*/
void
TextStyle::build_vectors()
{
parts.clear();
substitutions.clear();
boost::sregex_iterator i1(repr.begin(), repr.end(), var_exp);
boost::sregex_iterator i2;
string suffix;
if (i1 == i2)
return ;
int index = -1;
for (boost::sregex_iterator it = i1; it != i2; ++it) {
string prefix = it->prefix();
if (prefix.size()) {
parts.push_back(prefix);
++index;
}
++index;
string matched = string((*it)[0].first, (*it)[0].second);
substitutions[matched].push_back(index);
suffix = it->suffix();
parts.push_back(""); // this will be set during "output"
// with a value for $text or $style
}
if (suffix.size())
parts.push_back(suffix);
}
/**
* First substitute in the vector parts the values for $text and
* $style and return a string with the substituted values.
*
* @param text
* @param style
* @return
*/
string
TextStyle::output(const string &text, const string &style)
{
substitutionmapping["$text"] = text;
substitutionmapping["$style"] = style;
return output(substitutionmapping);
}
/**
* for each i substitutes: subst_map[i].first occurrence with subst_map[i].second
*/
std::string TextStyle::output(SubstitutionMapping &subst_map)
{
if (invalid) {
build_vectors();
invalid = false;
}
SubstitutionIndexes::const_iterator subIt;
IndexVector::const_iterator indexIt;
for (subIt = substitutions.begin(); subIt != substitutions.end(); ++subIt) {
for (indexIt = subIt->second.begin(); indexIt != subIt->second.end(); ++indexIt) {
parts[*indexIt] = subst_map[subIt->first];
}
}
string ret;
for (StringVector::const_iterator it = parts.begin(); it != parts.end(); ++it)
ret += *it;
return ret;
}
string
TextStyle::subst_style(const string &style)
{
return output(TEXT_VAR_TEXT, style); // leave $text untouched
}
TextStyle
TextStyle::compose(const TextStyle &inner)
{
return TextStyle(output(inner.toString()));
}
void
TextStyle::update(const string &inner)
{
repr = output(inner);
invalid = true;
}
void
TextStyle::update(const string &text, const string &style)
{
repr = output(text, style);
invalid = true;
}
void
TextStyle::update(const TextStyle &inner)
{
update(inner.toString());
}
bool
TextStyle::containsStyleVar() const
{
boost::regex style_exp(STYLE_VAR);
return boost::regex_search(repr, style_exp);
}
bool
TextStyle::empty() const
{
return repr == STYLE_VAR_TEXT || repr == TEXT_VAR_TEXT;
}
}
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