struct BuiltStyledStreamWriter : public StreamWriter
{
- mutable StyledStreamWriter old_;
-
BuiltStyledStreamWriter(
std::ostream* sout,
std::string const& indentation,
StreamWriter::CommentStyle cs);
virtual int write(Value const& root) const;
+private:
+ void writeValue(const Value& value);
+ void writeArrayValue(const Value& value);
+ bool isMultineArray(const Value& value);
+ void pushValue(const std::string& value);
+ void writeIndent();
+ void writeWithIndent(const std::string& value);
+ void indent();
+ void unindent();
+ void writeCommentBeforeValue(const Value& root);
+ void writeCommentAfterValueOnSameLine(const Value& root);
+ bool hasCommentForValue(const Value& value);
+ static std::string normalizeEOL(const std::string& text);
+
+ typedef std::vector<std::string> ChildValues;
+
+ ChildValues childValues_;
+ std::ostream* document_;
+ std::string indentString_;
+ int rightMargin_;
+ std::string indentation_;
+ bool addChildValues_;
};
BuiltStyledStreamWriter::BuiltStyledStreamWriter(
std::ostream* sout,
std::string const& indentation,
StreamWriter::CommentStyle cs)
: StreamWriter(sout)
- , old_(indentation)
+ , indentation_(indentation)
+ , rightMargin_(74)
{
}
int BuiltStyledStreamWriter::write(Value const& root) const
{
- old_.write(sout_, root);
+ write(sout_, root);
return 0;
}
+void BuiltStyledStreamWriter::write(std::ostream& out, const Value& root) {
+ document_ = &out;
+ addChildValues_ = false;
+ indentString_ = "";
+ writeCommentBeforeValue(root);
+ writeValue(root);
+ writeCommentAfterValueOnSameLine(root);
+ *document_ << "\n";
+ document_ = NULL; // Forget the stream, for safety.
+}
+
+void BuiltStyledStreamWriter::writeValue(const Value& value) {
+ switch (value.type()) {
+ case nullValue:
+ pushValue("null");
+ break;
+ case intValue:
+ pushValue(valueToString(value.asLargestInt()));
+ break;
+ case uintValue:
+ pushValue(valueToString(value.asLargestUInt()));
+ break;
+ case realValue:
+ pushValue(valueToString(value.asDouble()));
+ break;
+ case stringValue:
+ pushValue(valueToQuotedString(value.asCString()));
+ break;
+ case booleanValue:
+ pushValue(valueToString(value.asBool()));
+ break;
+ case arrayValue:
+ writeArrayValue(value);
+ break;
+ case objectValue: {
+ Value::Members members(value.getMemberNames());
+ if (members.empty())
+ pushValue("{}");
+ else {
+ writeWithIndent("{");
+ indent();
+ Value::Members::iterator it = members.begin();
+ for (;;) {
+ const std::string& name = *it;
+ const Value& childValue = value[name];
+ writeCommentBeforeValue(childValue);
+ writeWithIndent(valueToQuotedString(name.c_str()));
+ *document_ << " : ";
+ writeValue(childValue);
+ if (++it == members.end()) {
+ writeCommentAfterValueOnSameLine(childValue);
+ break;
+ }
+ *document_ << ",";
+ writeCommentAfterValueOnSameLine(childValue);
+ }
+ unindent();
+ writeWithIndent("}");
+ }
+ } break;
+ }
+}
+
+void BuiltStyledStreamWriter::writeArrayValue(const Value& value) {
+ unsigned size = value.size();
+ if (size == 0)
+ pushValue("[]");
+ else {
+ bool isArrayMultiLine = isMultineArray(value);
+ if (isArrayMultiLine) {
+ writeWithIndent("[");
+ indent();
+ bool hasChildValue = !childValues_.empty();
+ unsigned index = 0;
+ for (;;) {
+ const Value& childValue = value[index];
+ writeCommentBeforeValue(childValue);
+ if (hasChildValue)
+ writeWithIndent(childValues_[index]);
+ else {
+ writeIndent();
+ writeValue(childValue);
+ }
+ if (++index == size) {
+ writeCommentAfterValueOnSameLine(childValue);
+ break;
+ }
+ *document_ << ",";
+ writeCommentAfterValueOnSameLine(childValue);
+ }
+ unindent();
+ writeWithIndent("]");
+ } else // output on a single line
+ {
+ assert(childValues_.size() == size);
+ *document_ << "[ ";
+ for (unsigned index = 0; index < size; ++index) {
+ if (index > 0)
+ *document_ << ", ";
+ *document_ << childValues_[index];
+ }
+ *document_ << " ]";
+ }
+ }
+}
+
+bool BuiltStyledStreamWriter::isMultineArray(const Value& value) {
+ int size = value.size();
+ bool isMultiLine = size * 3 >= rightMargin_;
+ childValues_.clear();
+ for (int index = 0; index < size && !isMultiLine; ++index) {
+ const Value& childValue = value[index];
+ isMultiLine =
+ isMultiLine || ((childValue.isArray() || childValue.isObject()) &&
+ childValue.size() > 0);
+ }
+ if (!isMultiLine) // check if line length > max line length
+ {
+ childValues_.reserve(size);
+ addChildValues_ = true;
+ int lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+ for (int index = 0; index < size; ++index) {
+ writeValue(value[index]);
+ lineLength += int(childValues_[index].length());
+ }
+ addChildValues_ = false;
+ isMultiLine = isMultiLine || lineLength >= rightMargin_;
+ }
+ return isMultiLine;
+}
+
+void BuiltStyledStreamWriter::pushValue(const std::string& value) {
+ if (addChildValues_)
+ childValues_.push_back(value);
+ else
+ *document_ << value;
+}
+
+void BuiltStyledStreamWriter::writeIndent() {
+ /*
+ Some comments in this method would have been nice. ;-)
+
+ if ( !document_.empty() )
+ {
+ char last = document_[document_.length()-1];
+ if ( last == ' ' ) // already indented
+ return;
+ if ( last != '\n' ) // Comments may add new-line
+ *document_ << '\n';
+ }
+ */
+ *document_ << '\n' << indentString_;
+}
+
+void BuiltStyledStreamWriter::writeWithIndent(const std::string& value) {
+ writeIndent();
+ *document_ << value;
+}
+
+void BuiltStyledStreamWriter::indent() { indentString_ += indentation_; }
+
+void BuiltStyledStreamWriter::unindent() {
+ assert(indentString_.size() >= indentation_.size());
+ indentString_.resize(indentString_.size() - indentation_.size());
+}
+
+void BuiltStyledStreamWriter::writeCommentBeforeValue(const Value& root) {
+ if (!root.hasComment(commentBefore))
+ return;
+ *document_ << root.getComment(commentBefore);
+ *document_ << "\n";
+}
+
+void BuiltStyledStreamWriter::writeCommentAfterValueOnSameLine(const Value& root) {
+ if (root.hasComment(commentAfterOnSameLine))
+ *document_ << " " + root.getComment(commentAfterOnSameLine);
+
+ if (root.hasComment(commentAfter)) {
+ *document_ << "\n";
+ *document_ << root.getComment(commentAfter);
+ *document_ << "\n";
+ }
+}
+
+bool BuiltStyledStreamWriter::hasCommentForValue(const Value& value) {
+ return value.hasComment(commentBefore) ||
+ value.hasComment(commentAfterOnSameLine) ||
+ value.hasComment(commentAfter);
+}
+
StreamWriter::StreamWriter(std::ostream* sout)
: sout_(*sout)
{