133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
#pragma once
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#include <list>
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#include "StarJson.hpp"
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namespace Star {
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STAR_CLASS(FormattedJson);
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struct ObjectElement;
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struct ObjectKeyElement;
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struct ValueElement;
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struct WhitespaceElement;
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struct ColonElement;
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struct CommaElement;
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typedef Variant<ValueElement, ObjectKeyElement, WhitespaceElement, ColonElement, CommaElement> JsonElement;
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struct ValueElement {
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ValueElement(FormattedJson const& json);
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FormattedJsonPtr value;
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bool operator==(ValueElement const& v) const;
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};
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struct ObjectKeyElement {
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String key;
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bool operator==(ObjectKeyElement const& v) const;
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};
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struct WhitespaceElement {
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String whitespace;
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bool operator==(WhitespaceElement const& v) const;
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};
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struct ColonElement {
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bool operator==(ColonElement const&) const;
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};
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struct CommaElement {
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bool operator==(CommaElement const&) const;
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};
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std::ostream& operator<<(std::ostream& os, JsonElement const& elem);
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// Class representing formatted JSON data. Preserves whitespace and comments.
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class FormattedJson {
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public:
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typedef List<JsonElement> ElementList;
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typedef size_t ElementLocation;
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static FormattedJson parse(String const& string);
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static FormattedJson parseJson(String const& string);
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static FormattedJson ofType(Json::Type type);
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FormattedJson();
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FormattedJson(Json const&);
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Json const& toJson() const;
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FormattedJson get(String const& key) const;
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FormattedJson get(size_t index) const;
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// Returns a new FormattedJson with the given values added or erased.
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// Prepend, insert and append update the value in-place if the key already
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// exists.
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FormattedJson prepend(String const& key, FormattedJson const& value) const;
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FormattedJson insertBefore(String const& key, FormattedJson const& value, String const& beforeKey) const;
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FormattedJson insertAfter(String const& key, FormattedJson const& value, String const& afterKey) const;
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FormattedJson append(String const& key, FormattedJson const& value) const;
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FormattedJson set(String const& key, FormattedJson const& value) const;
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FormattedJson eraseKey(String const& key) const;
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FormattedJson insert(size_t index, FormattedJson const& value) const;
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FormattedJson append(FormattedJson const& value) const;
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FormattedJson set(size_t index, FormattedJson const& value) const;
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FormattedJson eraseIndex(size_t index) const;
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// Returns the number of elements in a Json array, or entries in an object.
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size_t size() const;
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bool contains(String const& key) const;
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Json::Type type() const;
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bool isType(Json::Type type) const;
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String typeName() const;
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String toFormattedDouble() const;
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String toFormattedInt() const;
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String repr() const;
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String printJson() const;
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ElementList const& elements() const;
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// Equality ignores whitespace and formatting. It just compares the Json
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// values.
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bool operator==(FormattedJson const& v) const;
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bool operator!=(FormattedJson const& v) const;
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private:
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friend class FormattedJsonBuilderStream;
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static FormattedJson object(ElementList const& elements);
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static FormattedJson array(ElementList const& elements);
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FormattedJson objectInsert(String const& key, FormattedJson const& value, ElementLocation loc) const;
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void appendElement(JsonElement const& elem);
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FormattedJson const& getFormattedJson(ElementLocation loc) const;
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FormattedJson formattedAs(String const& formatting) const;
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Json m_jsonValue;
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ElementList m_elements;
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// Used to preserve the formatting of numbers, i.e. -0 vs 0, 1.0 vs 1:
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Maybe<String> m_formatting;
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Maybe<ElementLocation> m_lastKey, m_lastValue;
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Map<String, pair<ElementLocation, ElementLocation>> m_objectEntryLocations;
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List<ElementLocation> m_arrayElementLocations;
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};
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std::ostream& operator<<(std::ostream& os, FormattedJson const& json);
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}
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template <> struct fmt::formatter<Star::FormattedJson> : ostream_formatter {};
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