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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* templateparser.cc
*
* Mon May 12 08:36:24 CEST 2008
* Copyright 2008 Bent Bisballe Nyeng, Lars Bisballe Jensen and Peter Skaarup
* deva@aasimon.org, elsenator@gmail.com and piparum@piparum.dk
****************************************************************************/
/*
* This file is part of Pracro.
*
* Pracro is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pracro is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pracro; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "templateparser.h"
// For assert
#include <assert.h>
// For open and friends
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
// For vprintf and friends
#include <stdarg.h>
void TemplateParser::error(char* fmt, ...)
{
// TODO: Throw exception here.
fprintf(stderr, "Error in TemplateParser: ");
va_list argp;
va_start(argp, fmt);
vfprintf(stderr, fmt, argp);
va_end(argp);
fprintf(stderr, "\n");
}
TemplateParser::TemplateParser(std::string templatefile)
{
state = UNDEFINED;
t = NULL;
current_macro = NULL;
current_map = NULL;
fd = open(templatefile.c_str(), O_RDONLY);
if(fd == -1) error("Could not open file %s", templatefile.c_str());
}
TemplateParser::~TemplateParser()
{
if(fd != -1) close(fd);
}
void TemplateParser::startTag(std::string name, std::map< std::string, std::string> attributes)
{
// Create template and enable parsing of macrosequences
if(name == "template") {
if(state != UNDEFINED) error("template found not in outer level.");
state = TEMPLATE;
assert(!t); // A Template has already been allocated!
t = new Template();
t->attributes = attributes;
return;
}
// Enable macro parsing
if(name == "macrosequence") {
if(state != TEMPLATE) error("macrosequence found outside template.");
state = MACROSEQUENCE;
assert(t); // A Template has not yet been allocated, cannot create macrosequence!
t->macrosequence.attributes = attributes;
return;
}
// Create macro and enable parsing of queries, maps and window
if(name == "macro") {
if(state != MACROSEQUENCE) error("macro found outside macrosequence.");
state = MACRO;
assert(t); // A Template has not yet been allocated, cannot create macro!
Macro m;
m.attributes = attributes;
t->macrosequence.macroes.push_back(m);
current_macro = &(t->macrosequence.macroes.back());
return;
}
// Enable Query parsing
if(name == "queries") {
if(state != TEMPLATE) error("queries found outside template.");
state = QUERIES;
assert(current_macro); // No macro is currently available, cannot create queries!
return;
}
// Create Query
if(name == "query") {
if(state != QUERIES) error("query found outside queries.");
state = QUERY;
assert(current_macro); // No macro is currently available, cannot create query!
Query q;
q.attributes = attributes;
current_macro->queries.push_back(q);
return;
}
// Enable Map parsing
if(name == "maps") {
if(state != TEMPLATE) error("maps found outside template.");
state = MAPS;
assert(current_macro); // No macro is currently available, cannot create maps!
return;
}
// Create Query
if(name == "map") {
if(state != MAPS) error("map found outside maps.");
state = MAP;
assert(current_macro); // No macro is currently available, cannot create map!
Map m;
m.attributes = attributes;
current_macro->maps.push_back(m);
return;
}
// Enable widget parsing
if(name == "window") {
if(state != TEMPLATE) error("window found outside template.");
state = WINDOW;
assert(current_macro); // No macro is currently available, cannot create window!
current_macro->window.attributes = attributes;
widgetstack.push_back(&(current_macro->window));
return;
}
// TODO: We need to parse some (maybe even all) widgets in order to
// make db lookup of the previous values.
if(state == WINDOW) {
assert(widgetstack.size()); // Widget stack is empty, cannot create!
Widget w;
w.attributes = attributes;
widgetstack.back()->widgets.push_back(w);
widgetstack.push_back(&(widgetstack.back()->widgets.back()));
return;
}
// Handle include
if(name == "include") {
return;
}
error("Unknown/illegal tag: %s", name.c_str());
}
void TemplateParser::endTag(std::string name)
{
if(name == "template") state = UNDEFINED;
if(name == "macrosequence") state = TEMPLATE;
if(name == "macro") state = MACROSEQUENCE;
if(name == "queries") state = MACRO;
if(name == "query") state = QUERIES;
if(name == "maps") state = MACRO;
if(name == "map") state = MAPS;
if(name == "window") state = MACRO;
if(state == WINDOW) {
assert(widgetstack.size()); // Widget stack is empty, cannot pop!
widgetstack.pop_back();
}
}
int TemplateParser::readData(char *data, size_t size)
{
if(fd == -1) return 0;
return read(fd, data, size);
}
Template *TemplateParser::getTemplate()
{
return t;
}
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