ITextEntryControl.h

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/*
 ==============================================================================

 This file is part of the iPlug 2 library. Copyright (C) the iPlug 2 developers.

 See LICENSE.txt for  more info.

 ==============================================================================
 */

#pragma once

#define STB_TEXTEDIT_CHARTYPE char16_t
#define STB_TEXTEDIT_POSITIONTYPE int
#define STB_TEXTEDIT_STRING iplug::igraphics::ITextEntryControl
#define STB_TEXTEDIT_KEYTYPE uint32_t

#include "stb_textedit.h"

#include "IControl.h"

BEGIN_IPLUG_NAMESPACE
BEGIN_IGRAPHICS_NAMESPACE

class ITextEntryControl : public IControl
{
public:
  ITextEntryControl();
  
  //IControl
  void Draw(IGraphics& g) override;
  void OnMouseDown(float x, float y, const IMouseMod& mod) override;
  bool OnKeyDown(float x, float y, const IKeyPress& key) override;
  void OnMouseDrag(float x, float y, float dX, float dY, const IMouseMod& mod) override;
  void OnMouseUp(float x, float y, const IMouseMod& mod) override;
  void OnMouseDblClick(float x, float y, const IMouseMod& mod) override;
  void OnEndAnimation() override;
  
  static int DeleteChars(ITextEntryControl* _this, size_t pos, size_t num);
  static int InsertChars(ITextEntryControl* _this, size_t pos, const char16_t* text, size_t num);
  static void Layout(StbTexteditRow* row, ITextEntryControl* _this, int start_i);
  static float GetCharWidth(ITextEntryControl* _this, int n, int i);
  static char16_t GetChar(ITextEntryControl* _this, int pos);
  static int GetLength(ITextEntryControl* _this);

  bool EditInProgress() { return mEditing; }
  void DismissEdit();
  void CommitEdit();

  void CreateTextEntry(int paramIdx, const IText& text, const IRECT& bounds, int length, const char* str);

private:
    
  void SetStr(const char* str);

  template<typename Proc>
  bool CallSTB(Proc proc);
  void OnStateChanged();
  void OnTextChange();
  void FillCharWidthCache();
  void CalcCursorSizes();
  float MeasureCharWidth(char16_t c, char16_t nc);
  void CopySelection();
  void Paste();
  void Cut();
  void SelectAll();
  
  bool mDrawCursor = false;
  bool mEditing = false;
  bool mRecursiveKeyGuard = false;
  bool mCursorIsSet = false;
  bool mCursorSizesValid = false;
  bool mNotifyTextChange = false;

  STB_TexteditState mEditState;
  WDL_TypedBuf<float> mCharWidths;
  std::u16string mEditString;
};

END_IGRAPHICS_NAMESPACE
END_IPLUG_NAMESPACE