Fix cppcheck variable scope warnings

These were all flagged by "(style) The scope of the variable 'x' can be reduced."
Narowing the scope improves readability, and if it is in a loop then the
compiler will be clever enough to produce efficient code, we do not need
manual optimization for POD types.

src/Lexer.cpp

@@ -320,12 +320,11 @@ bool Lexer::Pimpl::next(bool esc /* = false */)
 	}
 
 
-	unsigned char c = 0; // getc() returns an int
 	char cc = 0;
 	status = 0;
 	while (is && !status) {
 		is.get(cc);
-		c = cc;
+		unsigned char c = cc;
 
 		if (c == commentChar) {
 			// Read rest of line (fast :-)
@@ -348,9 +347,8 @@ bool Lexer::Pimpl::next(bool esc /* = false */)
 
 			if (esc) {
 
-				bool escaped = false;
 				do {
-					escaped = false;
+					bool escaped = false;
 					is.get(cc);
 					c = cc;
 					if (c == '\r') continue;

src/Paragraph.cpp

@@ -2041,14 +2041,12 @@ void Paragraph::setBeginOfBody()
 	pos_type end = size();
 	if (i < end && !(isNewline(i) || isEnvSeparator(i))) {
 		++i;
-		char_type previous_char = 0;
-		char_type temp = 0;
 		if (i < end) {
-			previous_char = d->text_[i];
+			char_type previous_char = d->text_[i];
 			if (!(isNewline(i) || isEnvSeparator(i))) {
 				++i;
 				while (i < end && previous_char != ' ') {
-					temp = d->text_[i];
+					char_type temp = d->text_[i];
 					if (isNewline(i) || isEnvSeparator(i))
 						break;
 					++i;

src/ServerSocket.cpp

@@ -129,11 +129,11 @@ void ServerSocket::dataCallback(int fd)
 		return;
 	shared_ptr<LyXDataSocket> client = it->second;
 	string line;
-	size_t pos;
 	bool saidbye = false;
 	while (!saidbye && client->readln(line)) {
 		// The protocol must be programmed here
 		// Split the key and the data
+		size_t pos;
 		if ((pos = line.find(':')) == string::npos) {
 			client->writeln("ERROR:" + line + ":malformed message");
 			continue;

src/Text.cpp

@@ -1186,7 +1186,6 @@ bool Text::cursorVisLeftOneWord(Cursor & cur)
 	LBUFERR(this == cur.text());
 
 	pos_type left_pos, right_pos;
-	bool left_is_letter, right_is_letter;
 
 	Cursor temp_cur = cur;
 
@@ -1195,9 +1194,9 @@ bool Text::cursorVisLeftOneWord(Cursor & cur)
 
 		// collect some information about current cursor position
 		temp_cur.getSurroundingPos(left_pos, right_pos);
-		left_is_letter =
+		bool left_is_letter =
 			(left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
-		right_is_letter =
+		bool right_is_letter =
 			(right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
 
 		// if we're not at a letter/non-letter boundary, continue moving
@@ -1223,7 +1222,6 @@ bool Text::cursorVisRightOneWord(Cursor & cur)
 	LBUFERR(this == cur.text());
 
 	pos_type left_pos, right_pos;
-	bool left_is_letter, right_is_letter;
 
 	Cursor temp_cur = cur;
 
@@ -1232,9 +1230,9 @@ bool Text::cursorVisRightOneWord(Cursor & cur)
 
 		// collect some information about current cursor position
 		temp_cur.getSurroundingPos(left_pos, right_pos);
-		left_is_letter =
+		bool left_is_letter =
 			(left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
-		right_is_letter =
+		bool right_is_letter =
 			(right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
 
 		// if we're not at a letter/non-letter boundary, continue moving

src/frontends/qt4/GuiApplication.cpp

@@ -2473,13 +2473,12 @@ QAbstractItemModel * GuiApplication::languageModel()
 
 	QStandardItemModel * lang_model = new QStandardItemModel(this);
 	lang_model->insertColumns(0, 3);
-	int current_row;
 	QIcon speller(getPixmap("images/", "dialog-show_spellchecker", "svgz,png"));
 	QIcon saurus(getPixmap("images/", "thesaurus-entry", "svgz,png"));
 	Languages::const_iterator it = lyx::languages.begin();
 	Languages::const_iterator end = lyx::languages.end();
 	for (; it != end; ++it) {
-		current_row = lang_model->rowCount();
+		int current_row = lang_model->rowCount();
 		lang_model->insertRows(current_row, 1);
 		QModelIndex pl_item = lang_model->index(current_row, 0);
 		QModelIndex sp_item = lang_model->index(current_row, 1);

src/frontends/qt4/GuiBranches.cpp

@@ -206,10 +206,10 @@ void GuiBranches::on_renamePB_pressed()
 	if (!sel_branch.isEmpty()) {
 		docstring newname;
 		docstring const oldname = qstring_to_ucs4(sel_branch);
-		bool success = false;
 		if (Alert::askForText(newname, _("Enter new branch name"), oldname)) {
 			if (newname.empty() || oldname == newname)
 				return;
+			bool success = false;
 			if (branchlist_.find(newname)) {
 				docstring text = support::bformat(
 					_("A branch with the name \"%1$s\" already exists.\n"

src/frontends/qt4/GuiDocument.cpp

@@ -3506,14 +3506,13 @@ void GuiDocument::updateIncludeonlys()
 		masterChildModule->childrenTW->setEnabled(true);
 		masterChildModule->maintainAuxCB->setEnabled(true);
 	}
-	QTreeWidgetItem * item = 0;
 	ListOfBuffers children = buffer().getChildren();
 	ListOfBuffers::const_iterator it  = children.begin();
 	ListOfBuffers::const_iterator end = children.end();
 	bool has_unincluded = false;
 	bool all_unincluded = true;
 	for (; it != end; ++it) {
-		item = new QTreeWidgetItem(masterChildModule->childrenTW);
+		QTreeWidgetItem * item = new QTreeWidgetItem(masterChildModule->childrenTW);
 		// FIXME Unicode
 		string const name =
 			to_utf8(makeRelPath(from_utf8((*it)->fileName().absFileName()),

src/frontends/qt4/GuiIndices.cpp

@@ -233,11 +233,10 @@ void GuiIndices::on_renamePB_clicked()
 	if (!sel_index.isEmpty()) {
 		docstring newname;
 		docstring const oldname = qstring_to_ucs4(sel_index);
-		bool success = false;
 		if (Alert::askForText(newname, _("Enter new index name"), oldname)) {
 			if (newname.empty() || oldname == newname)
 				return;
-			success = indiceslist_.rename(qstring_to_ucs4(sel_index), newname);
+			bool success = indiceslist_.rename(qstring_to_ucs4(sel_index), newname);
 			newIndexLE->clear();
 			updateView();
 			if (!success)

src/frontends/qt4/GuiProgressView.cpp

@@ -96,7 +96,6 @@ GuiProgressView::GuiProgressView(GuiView & parent, Qt::DockWidgetArea area,
 	}
 	sort(dmap.begin(), dmap.end(), DebugSorter);
 
-	QTreeWidgetItem * item = 0;
 	widget_->debugMessagesTW->setColumnCount(2);
 	widget_->debugMessagesTW->headerItem()->setText(0, qt_("Debug Level"));
 	widget_->debugMessagesTW->headerItem()->setText(1, qt_("Set"));
@@ -104,7 +103,7 @@ GuiProgressView::GuiProgressView(GuiView & parent, Qt::DockWidgetArea area,
 	DebugVector::const_iterator dit = dmap.begin();
 	DebugVector::const_iterator const den = dmap.end();
 	for (; dit != den; ++dit) {
-		item = new QTreeWidgetItem(widget_->debugMessagesTW);
+		QTreeWidgetItem * item = new QTreeWidgetItem(widget_->debugMessagesTW);
 		item->setText(0, dit->second);
 		item->setData(0, Qt::UserRole, int(dit->first));
 		item->setText(1, qt_("No"));

src/frontends/qt4/GuiSymbols.cpp

@@ -227,9 +227,6 @@ public:
 		static QString const strCharacter = qt_("Character: ");
 		static QString const strCodePoint = qt_("Code Point: ");
 
-		// FIXME THREAD
-		static char codeName[10];
-
 		char_type c = symbols_.at(index.row()); 
 
 		if (role == Qt::TextAlignmentRole)
@@ -239,6 +236,9 @@ public:
 			return toqstr(c);
 
 		if (role == Qt::ToolTipRole) {
+			// FIXME THREAD
+			static char codeName[10];
+
 			sprintf(codeName, "0x%04x", c);
 			return strCharacter + toqstr(c) + '\n'
 				+ strCodePoint + QLatin1String(codeName);

src/frontends/qt4/TocModel.cpp

@@ -208,7 +208,6 @@ void TocModel::populate(unsigned int & index, QModelIndex const & parent)
 {
 	int curdepth = (*toc_)[index].depth() + 1;
 
-	int current_row;
 	QModelIndex child_item;
 	model_->insertColumns(0, 1, parent);
 
@@ -222,7 +221,7 @@ void TocModel::populate(unsigned int & index, QModelIndex const & parent)
 		}
 		maxdepth_ = max(maxdepth_, item.depth());
 		mindepth_ = min(mindepth_, item.depth());
-		current_row = model_->rowCount(parent);
+		int current_row = model_->rowCount(parent);
 		model_->insertRows(current_row, 1, parent);
 		child_item = model_->index(current_row, 0, parent);
 		model_->setData(child_item, toqstr(item.str()), Qt::DisplayRole);

src/lyxfind.cpp

@@ -348,10 +348,10 @@ bool lyxreplace(BufferView * bv,
 	bool forward       = parse_bool(howto);
 	bool findnext      = howto.empty() ? true : parse_bool(howto);
 
-	int replace_count = 0;
 	bool update = false;
 
 	if (!has_deleted) {
+		int replace_count = 0;
 		if (all) {
 			replace_count = replaceAll(bv, search, rplc, casesensitive, matchword);
 			update = replace_count > 0;

src/output_xhtml.cpp

@@ -980,9 +980,6 @@ ParagraphList::const_iterator makeEnvironment(Buffer const & buf,
 		)
 			cnts.step(cntr, OutputUpdate);
 		ParagraphList::const_iterator send;
-		// this will be positive, if we want to skip the initial word
-		// (if it's been taken for the label).
-		pos_type sep = 0;
 
 		switch (style.latextype) {
 		case LATEX_ENVIRONMENT:
@@ -998,6 +995,9 @@ ParagraphList::const_iterator makeEnvironment(Buffer const & buf,
 					lastlay = 0;
 				}
 
+				// this will be positive, if we want to skip the
+				// initial word (if it's been taken for the label).
+				pos_type sep = 0;
 				bool const labelfirst = style.htmllabelfirst();
 				if (!labelfirst)
 					openItemTag(xs, style, par->params());

src/sgml.cpp

@@ -141,7 +141,6 @@ docstring sgml::cleanID(Buffer const & buf, OutputParams const & runparams,
 	static QThreadStorage<int> tMangleID;
 
 	MangledMap & mangledNames = tMangledNames.localData();
-	int & mangleID = tMangleID.localData();
 
 	MangledMap::const_iterator const known = mangledNames.find(orig);
 	if (known != mangledNames.end())
@@ -170,9 +169,10 @@ docstring sgml::cleanID(Buffer const & buf, OutputParams const & runparams,
 		}
 	}
 
-	if (mangle)
+	if (mangle) {
+		int & mangleID = tMangleID.localData();
 		content += "-" + convert<docstring>(mangleID++);
-	else if (isDigitASCII(content[content.size() - 1]))
+	} else if (isDigitASCII(content[content.size() - 1]))
 		content += ".";
 
 	mangledNames[orig] = content;

src/support/filetools.cpp

@@ -1007,7 +1007,6 @@ cmd_ret const runCommand(string const & cmd)
 	// variants ipstream, opstream
 
 #if defined (_WIN32)
-	int fno;
 	STARTUPINFO startup;
 	PROCESS_INFORMATION process;
 	SECURITY_ATTRIBUTES security;
@@ -1049,7 +1048,7 @@ cmd_ret const runCommand(string const & cmd)
 				0, 0, &startup, &process)) {
 
 			CloseHandle(process.hThread);
-			fno = _open_osfhandle((long)in, _O_RDONLY);
+			int fno = _open_osfhandle((long)in, _O_RDONLY);
 			CloseHandle(out);
 			inf = _fdopen(fno, "r");
 		}

src/tex2lyx/text.cpp

@@ -2934,7 +2934,6 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			// the syntax is \subfloat[list entry][sub caption]{content}
 			// if it is a table of figure depends on the surrounding float
 			// FIXME: second optional argument is not parsed
-			bool has_caption = false;
 			p.skip_spaces();
 			// do nothing if there is no outer float
 			if (!float_type.empty()) {
@@ -2946,6 +2945,7 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 				   << "\nstatus collapsed\n\n";
 				// test for caption
 				string caption;
+				bool has_caption = false;
 				if (p.next_token().cat() != catEscape &&
 						p.next_token().character() == '[') {
 							p.get_token(); // eat '['