Initial import of kscope 1.6.2

1 files changed, 524 insertions, 0 deletions

diff --git a/src/cscopefrontend.cpp b/src/cscopefrontend.cpp
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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 <qfileinfo.h>
+#include <qtimer.h>
+#include <kconfig.h>
+#include <kmessagebox.h>
+#include <klocale.h>
+#include <kglobalsettings.h>
+#include "cscopefrontend.h"
+#include "kscopeconfig.h"
+#include "configfrontend.h"
+
+#define BUILD_STR		"Building symbol database %d of %d"
+#define SEARCH_STR		"Search %d of %d"
+#define INV_STR			"Possible references retrieved %d of %d"
+#define REGEXP_STR		"Symbols matched %d of %d"
+#define SEARCHEND_STR	"%d lines"
+
+QString CscopeFrontend::s_sProjPath;
+uint CscopeFrontend::s_nProjArgs;
+uint CscopeFrontend::s_nSupArgs;
+
+/**
+ * Class constructor.
+ * @param	bAutoDelete	true to delete the object once the process has
+ *						terminated, false otherwise
+ */
+CscopeFrontend::CscopeFrontend(bool bAutoDelete) : 
+	Frontend(CSCOPE_RECORD_SIZE, bAutoDelete),
+	m_state(Unknown),
+	m_sErrMsg(""),
+	m_bRebuildOnExit(false)
+{
+}
+
+/**
+ * Class destructor.
+ */
+CscopeFrontend::~CscopeFrontend()
+{
+}
+
+/**
+ * Executes a Cscope process using the given command line arguments.
+ * The full path to the Cscope executable should be set in the "Path" key
+ * under the "Cscope" group.
+ * @param	slArgs	Command line arguments for Cscope
+ * @return	true if successful, false otherwise
+ */
+bool CscopeFrontend::run(const QStringList& slArgs)
+{
+	QStringList slCmdLine;
+
+	// Set the command line arguments
+	slCmdLine.append(Config().getCscopePath());
+	slCmdLine += slArgs;
+	
+	// Use verbose mode, if supported
+	if (s_nSupArgs & VerboseOut)
+		slCmdLine << "-v";
+		
+	// Project-specific options
+	if (s_nProjArgs & Kernel)
+		slCmdLine << "-k";
+	if (s_nProjArgs & InvIndex)
+		slCmdLine << "-q";
+	if (s_nProjArgs & NoCompression)
+		slCmdLine << "-c";
+	if (s_nProjArgs & s_nSupArgs & SlowPathDef)
+		slCmdLine << "-D";
+		
+	// Run a new process
+	if (!Frontend::run("cscope", slCmdLine, s_sProjPath)) {
+		emit aborted();
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * Executes a Cscope query.
+ * A query is composed of a numeric type and a query text, which are written
+ * to the stndard input of the currently running Cscope process.
+ * @param	nType		The type of query to run
+ * @param	sText		The query's text
+ * @param	bCase		true for case-sensitive queries, false otherwise
+ * @param	nMaxRecords	The maximal number of records to return (abort if this
+ *						number is exceeded)
+ */
+void CscopeFrontend::query(uint nType, const QString& sText, bool bCase, 
+	uint nMaxRecords)
+{
+	QString sQuery;
+	QStringList slArgs;
+	
+	m_nMaxRecords = nMaxRecords;
+	
+	// Create the Cscope command line
+	slArgs.append(QString("-L") + QString::number(nType));
+	slArgs.append(sText);
+	slArgs.append("-d");
+	if (!bCase)
+		slArgs.append("-C");
+		
+	run(slArgs);
+	
+	// Initialise stdout parsing
+	m_state = SearchSymbol;
+	m_delim = WSpace;
+
+	emit progress(0, 1);
+}
+
+/**
+ * Rebuilds the symbol database of the current project.
+ */
+void CscopeFrontend::rebuild()
+{
+	QStringList slArgs;
+	
+	// If a process is already running, kill it start a new one
+	if (isRunning()) {
+		m_bRebuildOnExit = true;
+		kill();
+		return;
+	}
+	
+	// Run the database building process
+	slArgs.append("-b");
+	run(slArgs);
+	
+	// Initialise output parsing
+	m_state = BuildStart;
+	m_delim = Newline;
+	
+	emit progress(0, 1);
+}
+
+/**
+ * Sets default parameters for all CscopeFrontend projects based on the
+ * current project.
+ * @param	sProjPath	The full path of the project's directory
+ * @param	nArgs		Project-specific command-line arguments
+ */
+void CscopeFrontend::init(const QString& sProjPath, uint nArgs)
+{
+	s_sProjPath = sProjPath;
+	s_nProjArgs = nArgs;
+}
+
+/**
+ * Stops a Cscope action.
+ */
+void CscopeFrontend::slotCancel()
+{
+	kill();
+}
+
+/**
+ * Parses the output of a Cscope process.
+ * Implements a state machine, where states correspond to the output of the
+ * controlled Cscope process.
+ * @param	sToken	The current token read (the token delimiter is determined
+ *					by the current state)
+ * @return	A value indicating the way this token should be treated: dropped,
+ *			added to the token queue, or finishes a new record
+ */
+Frontend::ParseResult CscopeFrontend::parseStdout(QString& sToken,
+	ParserDelim /* ignored */)
+{
+	int nFiles, nTotal, nRecords;
+	ParseResult result = DiscardToken;
+	ParserState stPrev;
+	
+	// Remember previous state
+	stPrev = m_state;
+	
+	// Handle the token according to the current state
+	switch (m_state) {
+	case BuildStart:
+		if (sToken == "Building cross-reference...") {
+			m_state = BuildSymbol;
+			m_delim = WSpace;
+		}
+		else if (sToken == "Building inverted index...") {
+			emit buildInvIndex();
+		}
+		
+		result = DiscardToken;
+		break;
+
+	case BuildSymbol:
+		// A single angle bracket is the prefix of a progress indication,
+		// while double brackets is Cscope's prompt for a new query
+		if (sToken == ">") {
+			m_state = Building;
+			m_delim = Newline;
+		}
+
+		result = DiscardToken;
+		break;
+
+	case Building:
+		// Try to get building progress
+		if (sscanf(sToken.latin1(), BUILD_STR, &nFiles, &nTotal) == 2) {
+			emit progress(nFiles, nTotal);
+			
+			// Check for last progress message
+			if (nFiles == nTotal) {
+				m_state = BuildStart;
+				m_delim = Newline;
+				
+				result = DiscardToken;
+				break;
+			}
+		}
+
+		// Wait for another progress line or the "ready" symbol
+		m_state = BuildSymbol;
+		m_delim = WSpace;
+
+		result = DiscardToken;
+		break;
+
+	case SearchSymbol:
+		// Check for more search progress, or the end of the search,
+		// designated by a line in the format of "cscope: X lines"
+		if (sToken == ">") {
+			m_state = Searching;
+			m_delim = Newline;
+			result = DiscardToken;
+			break;
+		}
+		else if (sToken == "cscope:") {
+			m_state = SearchEnd;
+			m_delim = Newline;
+			result = DiscardToken;
+			break;
+		}
+
+	case File:
+		// Is this the first entry? If so, signal that the query is complete
+		if (stPrev != LineText)
+			emit progress(1, 1);
+
+		// Treat the token as the name of the file in this record
+		m_state = Func;
+		result = AcceptToken;
+		break;
+
+	case Searching:
+		// Try to get the search progress value (ignore other messages)
+		if ((sscanf(sToken.latin1(), SEARCH_STR, &nFiles, &nTotal) == 2) ||
+			(sscanf(sToken.latin1(), INV_STR, &nFiles, &nTotal) == 2) ||
+			(sscanf(sToken.latin1(), REGEXP_STR, &nFiles, &nTotal) == 2)) {
+			emit progress(nFiles, nTotal);
+		}
+
+		m_state = SearchSymbol;
+		m_delim = WSpace;
+		result = DiscardToken;
+		break;
+
+	case SearchEnd:
+		// Get the number of results found in this search
+		if ((sscanf(sToken.latin1(), SEARCHEND_STR, &nRecords) == 1) &&
+			(m_nMaxRecords > 0) &&
+			(nRecords > m_nMaxRecords)) {
+			result = Abort;
+		}
+		else {
+			m_state = File;
+			m_delim = WSpace;
+			result = DiscardToken;
+		}
+		
+		break;
+		
+	case Func:
+		// Treat the token as the name of the function in this record
+		if (sToken.toInt()) {
+			// In case of a global definition, there is no function name, and
+			// instead the line number is given immediately
+			m_state = LineText;
+			m_delim = Newline;
+		}
+		else {
+			// Not a number, it is the name of the function
+			m_state = Line;
+		}
+		
+		result = AcceptToken;
+		break;
+
+	case Line:
+		// Treat the token as the line number in this record
+		m_state = LineText;
+		m_delim = Newline;
+		result = AcceptToken;
+		break;
+
+	case LineText:
+		// Treat the token as the text of this record, and report a new
+		// record
+		m_state = File;
+		m_delim = WSpace;
+		result = RecordReady;
+		break;
+
+	default:
+		// Do nothing (prevents a compilation warning for unused enum values)
+		break;
+	}
+
+	return result;
+}
+
+/**
+ * Handles Cscope messages sent to the standard error stream.
+ * @param	sText	The error message text
+ */
+void CscopeFrontend::parseStderr(const QString& sText)
+{
+	// Wait for a complete line to arrive
+	m_sErrMsg += sText;
+	if (!sText.endsWith("\n"))
+		return;
+	
+	// Display the error message
+	emit error(m_sErrMsg);
+		
+	// Line displayed, reset the text accumulator
+	m_sErrMsg = "";
+}
+
+/**
+ * Called when the underlying process exits.
+ * Checks if the rebuild flag was raised, and if so restarts the building
+ * process.
+ */
+void CscopeFrontend::finalize()
+{
+	// Reset the parser state machine
+	m_state = Unknown;
+	
+	// Restart the building process, if required
+	if (m_bRebuildOnExit) {
+		m_bRebuildOnExit = false;
+		rebuild();
+	}
+}
+
+/**
+ * Class constructor.
+ * @param	pMainWidget	The parent widget to use for the progress bar and
+ * 						label
+ */
+CscopeProgress::CscopeProgress(QWidget* pMainWidget) : QObject(),
+	m_pMainWidget(pMainWidget),
+	m_pProgressBar(NULL),
+	m_pLabel(NULL)
+{
+}
+
+/**
+ * Class destructor.
+ */
+CscopeProgress::~CscopeProgress()
+{
+}
+
+/**
+ * Displays query progress information.
+ * If the progress value is below the expected final value, a progress bar is
+ * used to show the advance of the query process. Otherwise, a label is
+ * displayed asking the user to wait ahile the query output is processed.
+ * @param	nProgress	The current progress value
+ * @param	nTotal		The expected final value
+ */
+void CscopeProgress::setProgress(int nProgress, int nTotal)
+{
+	// Was the final value is reached?
+	if (nProgress == nTotal) {
+		// Destroy the progress bar
+		if (m_pProgressBar != NULL) {
+			delete m_pProgressBar;
+			m_pProgressBar = NULL;
+		}
+		
+		// Show the "Please wait..." label
+		if (m_pLabel == NULL) {
+			m_pLabel = new QLabel(i18n("Processing query results, "
+				"please wait..."), m_pMainWidget);
+			m_pLabel->setFrameStyle(QFrame::Box | QFrame::Plain);
+			m_pLabel->setLineWidth(1);
+			m_pLabel->adjustSize();
+			
+			m_pLabel->setPaletteBackgroundColor(
+				KGlobalSettings::highlightColor());
+			m_pLabel->setPaletteForegroundColor(
+				KGlobalSettings::highlightedTextColor());
+				
+			QTimer::singleShot(1000, this, SLOT(slotShowLabel()));
+		}
+		
+		return;
+	}
+
+	// Create the progress bar, if it does not exist.
+	// Note that the progress bar will only be displayed one second after the
+	// first progress signal is received. Thus the bar will not be displayed
+	// on very short queries.
+	if (m_pProgressBar == NULL) {
+		m_pProgressBar = new QProgressBar(m_pMainWidget);
+		QTimer::singleShot(1000, this, SLOT(slotShowProgressBar()));
+	}
+	
+	// Set the current progress value
+	m_pProgressBar->setProgress(nProgress, nTotal);
+}
+
+/**
+ * detsroys any progress widgets when the process is terminated.
+ */
+void CscopeProgress::finished()
+{
+	// Destroy the progress bar
+	if (m_pProgressBar != NULL) {
+		delete m_pProgressBar;
+		m_pProgressBar = NULL;
+	}
+	
+	// Destroy the label
+	if (m_pLabel != NULL) {
+		delete m_pLabel;
+		m_pLabel = NULL;
+	}
+}
+
+/**
+ * Shows the progress bar.
+ * This slot is connected to a timer activated when the first progress signal
+ * is received.
+ */
+void CscopeProgress::slotShowProgressBar()
+{
+	if (m_pProgressBar != NULL)
+		m_pProgressBar->show();
+}
+
+/**
+ * Shows the "Please wait...".
+ * This slot is connected to a timer activated when the progress bar
+ * reaches its final value.
+ */
+void CscopeProgress::slotShowLabel()
+{
+	if (m_pLabel != NULL)
+		m_pLabel->show();
+}
+
+void CscopeVerifier::verify()
+{
+	ConfigFrontend* pConf;
+	 
+	pConf = new ConfigFrontend(true);
+	connect(pConf, SIGNAL(result(uint, const QString&)), this,
+		SLOT(slotConfigResult(uint, const QString&)));
+	connect(pConf, SIGNAL(finished(uint)), this, SLOT(slotFinished()));
+	
+	pConf->run(Config().getCscopePath(), "", "", true);
+}
+
+void CscopeVerifier::slotConfigResult(uint nType, const QString& sResult)
+{
+	switch (nType) {
+	case ConfigFrontend::CscopeVerbose:
+		if (sResult == "Yes")
+			m_nArgs |= CscopeFrontend::VerboseOut;
+		break;
+	
+	case ConfigFrontend::CscopeSlowPath:
+		if (sResult == "Yes")
+			m_nArgs |= CscopeFrontend::SlowPathDef;
+			
+		// If we got this far, then Cscope is configured properly
+		m_bResult = true;
+		break;
+	}
+}
+
+void CscopeVerifier::slotFinished()
+{
+	emit done(m_bResult, m_nArgs);
+	delete this;
+}
+
+#include "cscopefrontend.moc"