C++ QDocumentCursor::replaceSelectedText方法代码示例

void LatexTables::alignTableCols(QDocumentCursor &cur){
	QString text = getTableText(cur);
	if (!cur.hasSelection()) return;
	QString indentation = cur.selectionStart().line().indentation();
	
	// split off \begin and \end parts
	int index = text.indexOf("\\begin{")+6;
	int cellsStart;
	QList<CommandArgument> args = getCommandOptions(text, index, &cellsStart);
	if (args.count() < 2) return;
	QString tableType = args.at(0).value;
	
	
	
	// assume alignment in second arg except for the following environments (which have it in the third one)
	QString alignment;
	if (tabularNames.contains(tableType)) {
		alignment = args.at(1).value;
	} else if (tabularNamesWithOneOption.contains(tableType)) {
		if (args.count()<3) alignment = ""; // incomplete definition -> fall back to defaults
		else alignment = args.at(2).value;
	} else return; // not a registered table environment
	
	int cellsEnd = text.indexOf("\\end{"+tableType);
	if (cellsEnd<0) return;
	QString beginPart = text.left(cellsStart);
	QString endPart = text.mid(cellsEnd);
	
	
	LatexTableModel ltm;
	ltm.setContent(text.mid(cellsStart, cellsEnd-cellsStart));
	
	QStringList l_defs=splitColDef(alignment);
	simplifyColDefs(l_defs);
	QStringList content(ltm.getAlignedLines(l_defs));
	
	QString result = beginPart + '\n';
	for (int i=0; i<content.count(); i++) {
		result.append(indentation + content.at(i));
	}
	result.append(indentation + endPart);
	cur.replaceSelectedText(result);
}

QScriptValue searchReplaceFunction(QScriptContext *context, QScriptEngine *engine, bool replace){
	QEditor *editor = qobject_cast<QEditor*>(context->thisObject().toQObject());
	//read arguments
	SCRIPT_REQUIRE(editor, "invalid object");
	SCRIPT_REQUIRE(!replace || context->argumentCount()>=2, "at least two arguments are required");
	SCRIPT_REQUIRE(context->argumentCount()>=1, "at least one argument is required");
	SCRIPT_REQUIRE(context->argumentCount()<=4, "too many arguments");
	SCRIPT_REQUIRE(context->argument(0).isString()||context->argument(0).isRegExp(), "first argument must be a string or regexp");
	QDocumentSearch::Options flags = QDocumentSearch::Silent;
	bool global = false, caseInsensitive = false;
	QString searchFor;
	if (context->argument(0).isRegExp()) {
		flags |= QDocumentSearch::RegExp;
		QRegExp r = context->argument(0).toRegExp();
		searchFor = r.pattern();
		caseInsensitive = r.caseSensitivity() == Qt::CaseInsensitive;
		Q_ASSERT(caseInsensitive == context->argument(0).property("ignoreCase").toBool()); //check assumption about javascript core
		global = context->argument(0).property("global").toBool();
	} else searchFor = context->argument(0).toString();
	QScriptValue handler;
	QDocumentCursor scope = editor->document()->cursor(0,0,editor->document()->lineCount(),0);
	int handlerCount = 0;
	for (int i=1; i<context->argumentCount();i++)
		if (context->argument(i).isString() || context->argument(i).isFunction()) handlerCount++;
	SCRIPT_REQUIRE(handlerCount <= (replace?2:1), "too many string or function arguments");
	for (int i=1; i<context->argumentCount();i++) {
		QScriptValue a = context->argument(i);
		if (a.isFunction()) {
			SCRIPT_REQUIRE(!handler.isValid(), "Multiple callbacks");
			handler = a;
		} else if (a.isString()) {
			if (!replace || handlerCount > 1) {
				QString s = a.toString().toLower();
				global = s.contains("g");
				caseInsensitive = s.contains("i");
				if (s.contains("w")) flags |= QDocumentSearch::WholeWords;
			} else {
				SCRIPT_REQUIRE(!handler.isValid(), "Multiple callbacks");
				handler = a;
			}
			handlerCount--;
		} else if (a.isNumber()) flags |= QDocumentSearch::Options((int)a.toNumber());
		else if (a.isObject()) scope = cursorFromValue(a);
		else SCRIPT_REQUIRE(false, "Invalid argument");
	}
	SCRIPT_REQUIRE(handler.isValid() || !replace, "No callback given");
	if (!caseInsensitive) flags |= QDocumentSearch::CaseSensitive;
	
	//search/replace
	QDocumentSearch search(editor, searchFor, flags);
	search.setScope(scope);
	if (replace && handler.isString()) {
		search.setReplaceText(handler.toString());
		search.setOption(QDocumentSearch::Replace,true);
		return search.next(false, global, false, false);
	}
	if (!handler.isValid())
		return search.next(false,global,true,false);
	int count=0;
	while (search.next(false, false, true, false) && search.cursor().isValid()) {
		count++;
		QDocumentCursor temp = search.cursor();
		QScriptValue cb = handler.call(QScriptValue(), QScriptValueList() << engine->newQObject(&temp));
		if (replace && cb.isValid()){
			QDocumentCursor tmp = search.cursor();
			tmp.replaceSelectedText(cb.toString());
			search.setCursor(tmp.selectionEnd());
		}
		if (!global) break;
	}
	return count;
}