include/rive/lua/scripted_text.hpp

#ifndef _RIVE_SCRIPTED_TEXT_HPP_
#define _RIVE_SCRIPTED_TEXT_HPP_

#if defined(WITH_RIVE_SCRIPTING) && defined(WITH_RIVE_TEXT)
#include "rive/lua/rive_lua_libs.hpp"
#include "rive/text/raw_text.hpp"

namespace rive
{
// Shared by the Text userdata and the lines and glyphs it hands out, so those
// outlive a collected Text and can tell when the layout changed under them.
class ScriptedTextLayout : public RefCnt<ScriptedTextLayout>
{
public:
  ScriptedTextLayout(Factory* factory) : text(factory) {}
  RawText text;
};

class ScriptedText
{
public:
  rcp<ScriptedTextLayout> layout;
  static constexpr uint8_t luaTag = LUA_T_COUNT + 71;
  static constexpr const char* luaName = "Text";
  static constexpr bool hasMetatable = true;
};

class ScriptedTextLine
{
public:
  rcp<ScriptedTextLayout> layout;
  uint32_t revision;
  uint32_t index;
  static constexpr uint8_t luaTag = LUA_T_COUNT + 31;
  static constexpr const char* luaName = "TextLine";
  static constexpr bool hasMetatable = true;
};

// The generic for state over a line: `for _, glyph in line do` advances it
// one glyph per step instead of re-walking the line.
class ScriptedGlyphCursor
{
public:
  rcp<ScriptedTextLayout> layout;
  uint32_t revision;
  uint32_t line;
  GlyphItr itr;
  GlyphItr end;
  float x;
  static constexpr uint8_t luaTag = LUA_T_COUNT + 72;
  static constexpr const char* luaName = "GlyphCursor";
  static constexpr bool hasMetatable = false;
};

class ScriptedGlyph
{
public:
  rcp<ScriptedTextLayout> layout;
  uint32_t revision;
  const GlyphRun* run;
  uint32_t glyphIndex;
  // Pen position on the baseline, the shaper's offset included.
  Vec2D position;
  static constexpr uint8_t luaTag = LUA_T_COUNT + 37;
  static constexpr const char* luaName = "Glyph";
  static constexpr bool hasMetatable = true;
};
} // namespace rive
#endif
#endif