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// ArduinoJson - arduinojson.org
// Copyright Benoit Blanchon 2014-2018
// MIT License
#pragma once
namespace ArduinoJson {
namespace Internals {
// Decorator on top of Print to allow indented output.
// This class is used by JsonPrintable::prettyPrintTo() but can also be used
// for your own purpose, like logging.
template <typename Print>
class IndentedPrint {
public:
explicit IndentedPrint(Print &p) : sink(&p) {
level = 0;
tabSize = 2;
isNewLine = true;
}
size_t print(char c) {
size_t n = 0;
if (isNewLine) n += writeTabs();
n += sink->print(c);
isNewLine = c == '\n';
return n;
}
size_t print(const char *s) {
// TODO: optimize
size_t n = 0;
while (*s) n += print(*s++);
return n;
}
// Adds one level of indentation
void indent() {
if (level < MAX_LEVEL) level++;
}
// Removes one level of indentation
void unindent() {
if (level > 0) level--;
}
// Set the number of space printed for each level of indentation
void setTabSize(uint8_t n) {
if (n < MAX_TAB_SIZE) tabSize = n & MAX_TAB_SIZE;
}
private:
Print *sink;
uint8_t level : 4;
uint8_t tabSize : 3;
bool isNewLine : 1;
size_t writeTabs() {
size_t n = 0;
for (int i = 0; i < level * tabSize; i++) n += sink->print(' ');
return n;
}
static const int MAX_LEVEL = 15; // because it's only 4 bits
static const int MAX_TAB_SIZE = 7; // because it's only 3 bits
};
}
}
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