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/***************************************************************************
*
* Copyright (C) 2005 Elad Lahav (elad_lahav@users.sourceforge.net)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***************************************************************************/
#include <klocale.h>
#include "queryviewdriver.h"
#include "queryview.h"
/**
* Class constructor.
* Creates a driver that adds new records as root items in the given view.
* @param pView The view to which this driver should add records
* @param pParent The parent object of the driver
* @param szName The name of the object
*/
QueryViewDriver::QueryViewDriver(QueryView* pView, QObject* pParent,
const char* szName) : QObject(pParent, szName),
m_pView(pView),
m_pItem(NULL),
m_progress(pView),
m_bRunning(false)
{
m_pCscope = new CscopeFrontend();
// Add records to the page when Cscope outputs them
connect(m_pCscope, SIGNAL(dataReady(FrontendToken*)), this,
SLOT(slotDataReady(FrontendToken*)));
// Report progress information
connect(m_pCscope, SIGNAL(progress(int, int)), this,
SLOT(slotProgress(int, int)));
// Perform tasks when the query process terminates
connect(m_pCscope, SIGNAL(finished(uint)), this,
SLOT(slotFinished(uint)));
connect(m_pView, SIGNAL(destroyed()), this, SLOT(slotViewClosed()));
}
/**
* Class destructor.
*/
QueryViewDriver::~QueryViewDriver()
{
delete m_pCscope;
}
/**
* Executes a query.
* @param nType The type of the query (@see CscopeFrontend)
* @param sText The query's text
* @param bCase true for case-sensitive queries, false otherwise
* @param pItem If non-null, represents an view item passed back to
* the view in a call to addRecord()
*/
void QueryViewDriver::query(uint nType, const QString& sText, bool bCase,
QListViewItem* pItem)
{
m_pItem = pItem;
// Make sure sorting is disabled while entries are added
m_pView->setSorting(100);
// Execute the query
m_pCscope->query(nType, sText, bCase);
m_bRunning = true;
m_pView->setEnabled(false);
m_pView->setUpdatesEnabled(false);
}
/**
* Adds a query entry to the view.
* Called by a CscopeFrontend object, when a new entry was received in its
* whole from the Cscope back-end process.
* @param pToken The first token in the entry
*/
void QueryViewDriver::slotDataReady(FrontendToken* pToken)
{
QString sFile, sFunc, sLine, sText;
// Get the file name
sFile = pToken->getData();
pToken = pToken->getNext();
// Get the function name
sFunc = pToken->getData();
pToken = pToken->getNext();
// Get the line number
sLine = pToken->getData();
if (!sLine.toInt()) {
// Line number could not be 0!
// means that function name was empty
sLine = sFunc;
sFunc = "<global>";
}
else {
pToken = pToken->getNext();
}
// Get the line's text
sText = pToken->getData();
pToken = pToken->getNext();
// Add a new item at the end of the list
m_pView->addRecord(sFunc, sFile, sLine, sText, m_pItem);
}
/**
* Handles a finished query event, reported by the Cscope frontend object.
* If no resutls are available, a proper message is displayed. If only one
* record was generated by Cscope, it is automatically selected for viewing.
* @param nRecords The number of records the query has generated
*/
void QueryViewDriver::slotFinished(uint nRecords)
{
// The query is no longer running
m_bRunning = false;
m_pView->setEnabled(true);
m_pView->setUpdatesEnabled(true);
m_pView->triggerUpdate();
// Destroy the progress bar
m_progress.finished();
// Let owner widget decide what to do based on the number of records
m_pView->queryFinished(nRecords, m_pItem);
}
/**
* Displays search progress information.
* This slot is connected to the progress() signal emitted by a
* CscopeFrontend object.
* @param nFiles The number of files scanned
* @param nTotal The total number of files in the project
*/
void QueryViewDriver::slotProgress(int nFiles, int nTotal)
{
// A progress report is available, instruct the owner object to show the
// view
if (nTotal > 1)
m_pView->queryProgress();
// Set the progress bar
m_progress.setProgress(nFiles, nTotal);
}
/**
* Called when the owner view is destroyed.
*/
void QueryViewDriver::slotViewClosed()
{
m_pView = NULL;
m_pCscope->kill();
}
#include "queryviewdriver.moc"
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