72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
#ifndef highlighter_hh_INCLUDED
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#define highlighter_hh_INCLUDED
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#include "function_registry.hh"
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#include "memoryview.hh"
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#include "string.hh"
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#include "utils.hh"
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#include <functional>
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namespace Kakoune
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{
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class DisplayBuffer;
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class Context;
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enum class HighlightFlags
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{
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Highlight,
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MoveOnly
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};
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// An Highlighter is a function which mutates a DisplayBuffer in order to
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// change the visual representation of a file. It could be changing text
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// color, adding information text (line numbering for example) or replacing
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// buffer content (folding for example)
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struct Highlighter;
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using HighlighterAndId = std::pair<String, std::unique_ptr<Highlighter>>;
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struct Highlighter
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{
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virtual ~Highlighter() {}
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virtual void highlight(const Context& context, HighlightFlags flags, DisplayBuffer& display_buffer) = 0;
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virtual bool has_children() const { return false; }
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virtual Highlighter& get_child(StringView path) { throw runtime_error("this highlighter do not hold children"); }
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virtual void add_child(HighlighterAndId&& hl) { throw runtime_error("this highlighter do not hold children"); }
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virtual void remove_child(StringView id) { throw runtime_error("this highlighter do not hold children"); }
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virtual Completions complete_child(StringView path, ByteCount cursor_pos, bool group) const { throw runtime_error("this highlighter do not hold children"); }
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};
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template<typename Func>
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struct SimpleHighlighter : public Highlighter
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{
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SimpleHighlighter(Func func) : m_func(std::move(func)) {}
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virtual void highlight(const Context& context, HighlightFlags flags, DisplayBuffer& display_buffer) override
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{
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m_func(context, flags, display_buffer);
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}
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private:
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Func m_func;
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};
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template<typename T>
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std::unique_ptr<SimpleHighlighter<T>> make_simple_highlighter(T func)
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{
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return make_unique<SimpleHighlighter<T>>(std::move(func));
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}
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using HighlighterParameters = memoryview<String>;
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using HighlighterFactory = std::function<HighlighterAndId (HighlighterParameters params)>;
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struct HighlighterRegistry : FunctionRegistry<HighlighterFactory>,
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Singleton<HighlighterRegistry>
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{};
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}
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#endif // highlighter_hh_INCLUDED
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