poco/WebWidgets/src/Table.cpp

//
// Table.cpp
//
// $Id: //poco/Main/WebWidgets/src/Table.cpp#14 $
//
// Library: WebWidgets
// Package: Views
// Module:  Table
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/WebWidgets/Table.h"
#include "Poco/WebWidgets/RequestHandler.h"
#include "Poco/NumberParser.h"
#include "Poco/Net/HTTPServerResponse.h"


namespace Poco {
namespace WebWidgets {


const std::string Table::FIELD_COL("col");
const std::string Table::FIELD_ROW("row");
const std::string Table::FIELD_VAL("val");
const std::string Table::FIELD_CNT("cnt");
const std::string Table::EV_CELLCLICKED("click");
const std::string Table::EV_CELLVALUECHANGED("edit");
const std::string Table::EV_LOADDATA("load");


Table::Table(const TableColumns& tc, TableModel::Ptr pModel):
	View(typeid(Table)),
	_pModel(pModel),
	_columns(tc),
	_col(-1),
	_row(-1),
	_cnt(-1),
	_val(),
	_ev()
{
	checkValidConfig();
}

	
Table::Table(const std::string& name, const TableColumns& tc, TableModel::Ptr pModel):
	View(name, typeid(Table)),
	_pModel(pModel),
	_columns(tc),
	_col(-1),
	_row(-1),
	_cnt(-1),
	_val(),
	_ev()
{
	checkValidConfig();
}


Table::Table(const std::string& name, const std::type_info& type, const TableColumns& tc, TableModel::Ptr pModel):
	View(name, type),
	_pModel(pModel),
	_columns(tc),
	_col(-1),
	_row(-1),
	_cnt(-1),
	_val(),
	_ev()
{
	checkValidConfig();
}


Table::Table(const std::type_info& type, const TableColumns& tc, TableModel::Ptr pModel):
	View(type),
	_pModel(pModel),
	_columns(tc),
	_col(-1),
	_row(-1),
	_cnt(-1),
	_val(),
	_ev()
{
	checkValidConfig();
}


Table::~Table()
{
}


void Table::checkValidConfig()
{
	if (_columns.empty())
		throw Poco::InvalidArgumentException("At least one column is required for a table");
	if (!_pModel)
		throw Poco::InvalidArgumentException("An empty model is not allowed");
	if (_columns.size() != _pModel->getColumnCount())
		throw Poco::InvalidArgumentException("Model column count mismatches Columns count");

	TableColumns::iterator it = _columns.begin();
	for (; it != _columns.end(); ++it)
	{
		if ((*it))
			adoptChild((*it));;
	}
}


void Table::handleForm(const std::string& field, const std::string& value)
{
	if (field == FIELD_COL)
		handleCol(value);
	else if (field == FIELD_ROW)
		handleRow(value);
	else if (field == FIELD_VAL)
		handleVal(value);
	else if (field == FIELD_CNT)
		handleCnt(value);
	else if (field == RequestHandler::KEY_EVID)
		_ev = value;
}


void Table::handleRequest(const Poco::Net::HTTPServerRequest& req)
{
	if (_ev == EV_CELLVALUECHANGED)
		handleValueChanged();
	else if (_ev == EV_CELLCLICKED)
		handleCellClicked();
	_col = -1;
	_row = -1;
	_cnt = -1;
	_val.clear();
	_ev.clear();
}


void Table::handleRequestAndResponse(const Poco::Net::HTTPServerRequest& request, Poco::Net::HTTPServerResponse& response)
{
	// RequestHandler has already called all the handeForm stuff
	if (_ev == EV_LOADDATA)
	{
		/// serialize the Table back
		/// check for cnt and start if only a segment was requested

		if (_row < 0)
			_row = 0;
		if (_cnt < 0)
			_cnt = 0;
		LoadData ld(&response, this, _row, _cnt);
		_col = -1;
		_row = -1;
		_cnt = -1;
		_val.clear();
		_ev.clear();
		beforeLoad.notify(this, ld);
	}
	else
	{
		handleRequest(request);
		response.send();
	}
}


void Table::handleValueChanged()
{
	if (_col < 0 || _row < 0 || _col >= getColumnCount())
		throw InvalidArgumentException("col/row out of range");
	Cell::Ptr pCell = getColumns()[_col]->getCell();
	Formatter::Ptr pForm;
	if (pCell)
		pForm = pCell->getFormatter();
	if (pForm)
	{
		Poco::Any any = pForm->parse(_val);
		setValue(any, _row, _col);
	}
	else
		setValue(Poco::Any(_val), _row, _col);
}



void Table::handleCellClicked()
{
	if (_col < 0 || _row < 0 || _col >= getColumnCount())
		throw InvalidArgumentException("col/row out of range");
	CellClick ev(_row, _col);
	cellClicked(this, ev);
}


void Table::handleCol(const std::string& val)
{
	_col = Poco::NumberParser::parse(val);
}


void Table::handleRow(const std::string& val)
{
	_row = Poco::NumberParser::parse(val);
}


void Table::handleVal(const std::string& val)
{
	// we have no guarantee that _col is set at this timepoint
	// so we cannot get the formatter for the row
	// we do the conversion later in apply
	_val = val;
}


void Table::handleCnt(const std::string& val)
{
	_cnt = Poco::NumberParser::parse(val);
}


void Table::setValue(const Poco::Any& val, std::size_t row, std::size_t col)
{
	Poco::Any oldValue;
	if (getRowCount() > row)
		oldValue = getValue(row, col); 
	CellValueChange ev(row, col, oldValue, val);
	_pModel->setValue(val, row, col);
	cellValueChanged(this, ev);
}


Table::CellClick::CellClick(std::size_t r, std::size_t c):
	row(r),
	col(c)
{
}


Table::CellValueChange::CellValueChange(std::size_t r, std::size_t c, const Poco::Any& old, const Poco::Any& n):
	row(r),
	col(c),
	oldValue(old),
	newValue(n)
{
}


Table::LoadData::LoadData(Poco::Net::HTTPServerResponse* pR, Table* pT, int row, int cnt):
	pResponse(pR),
	pTable(pT),
	firstRow(row),
	rowCnt(cnt)
{
}


} } // namespace Poco::WebWidgets