blob: 214d3b474c2626b17d535bc0f317f2b18ca4cc04 [file] [log] [blame]
#pragma once
#include <string>
#include <vector>
#include <array>
#include <memory>
#include <unordered_set>
#include <unordered_map>
#include <map>
#include <regex>
#include "imgui.h"
class TextEditor
{
public:
enum class PaletteIndex
{
Default,
Keyword,
Number,
String,
CharLiteral,
Punctuation,
Preprocessor,
Identifier,
KnownIdentifier,
PreprocIdentifier,
Comment,
MultiLineComment,
Background,
Cursor,
Selection,
ErrorMarker,
Breakpoint,
LineNumber,
CurrentLineFill,
CurrentLineFillInactive,
CurrentLineEdge,
Max
};
enum class SelectionMode
{
Normal,
Word,
Line
};
struct Breakpoint
{
int mLine;
bool mEnabled;
std::string mCondition;
Breakpoint()
: mLine(-1)
, mEnabled(false)
{}
};
struct Coordinates
{
int mLine, mColumn;
Coordinates() : mLine(0), mColumn(0) {}
Coordinates(int aLine, int aColumn) : mLine(aLine), mColumn(aColumn)
{
assert(aLine >= 0);
assert(aColumn >= 0);
}
static Coordinates Invalid() { static Coordinates invalid(-1, -1); return invalid; }
bool operator ==(const Coordinates& o) const
{
return
mLine == o.mLine &&
mColumn == o.mColumn;
}
bool operator !=(const Coordinates& o) const
{
return
mLine != o.mLine ||
mColumn != o.mColumn;
}
bool operator <(const Coordinates& o) const
{
if (mLine != o.mLine)
return mLine < o.mLine;
return mColumn < o.mColumn;
}
bool operator >(const Coordinates& o) const
{
if (mLine != o.mLine)
return mLine > o.mLine;
return mColumn > o.mColumn;
}
bool operator <=(const Coordinates& o) const
{
if (mLine != o.mLine)
return mLine < o.mLine;
return mColumn <= o.mColumn;
}
bool operator >=(const Coordinates& o) const
{
if (mLine != o.mLine)
return mLine > o.mLine;
return mColumn >= o.mColumn;
}
};
struct Identifier
{
Coordinates mLocation;
std::string mDeclaration;
};
typedef std::string String;
typedef std::unordered_map<std::string, Identifier> Identifiers;
typedef std::unordered_set<std::string> Keywords;
typedef std::map<int, std::string> ErrorMarkers;
typedef std::unordered_set<int> Breakpoints;
typedef std::array<ImU32, (unsigned)PaletteIndex::Max> Palette;
typedef char Char;
struct Glyph
{
Char mChar;
PaletteIndex mColorIndex = PaletteIndex::Default;
bool mMultiLineComment : 1;
Glyph(Char aChar, PaletteIndex aColorIndex) : mChar(aChar), mColorIndex(aColorIndex), mMultiLineComment(false) {}
};
typedef std::vector<Glyph> Line;
typedef std::vector<Line> Lines;
struct LanguageDefinition
{
typedef std::pair<std::string, PaletteIndex> TokenRegexString;
typedef std::vector<TokenRegexString> TokenRegexStrings;
typedef bool (*TokenizeCallback)(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end, PaletteIndex & paletteIndex);
std::string mName;
Keywords mKeywords;
Identifiers mIdentifiers;
Identifiers mPreprocIdentifiers;
std::string mCommentStart, mCommentEnd;
TokenizeCallback mTokenize;
TokenRegexStrings mTokenRegexStrings;
bool mCaseSensitive;
LanguageDefinition()
: mTokenize(nullptr)
{
}
static const LanguageDefinition& CPlusPlus();
static const LanguageDefinition& HLSL();
static const LanguageDefinition& GLSL();
static const LanguageDefinition& C();
static const LanguageDefinition& SQL();
static const LanguageDefinition& AngelScript();
static const LanguageDefinition& Lua();
};
TextEditor();
~TextEditor();
void SetLanguageDefinition(const LanguageDefinition& aLanguageDef);
const LanguageDefinition& GetLanguageDefinition() const { return mLanguageDefinition; }
const Palette& GetPalette() const { return mPalette; }
void SetPalette(const Palette& aValue);
void SetErrorMarkers(const ErrorMarkers& aMarkers) { mErrorMarkers = aMarkers; }
void SetBreakpoints(const Breakpoints& aMarkers) { mBreakpoints = aMarkers; }
void Render(const char* aTitle, const ImVec2& aSize = ImVec2(), bool aBorder = false);
void SetText(const std::string& aText);
std::string GetText() const;
std::string GetSelectedText() const;
std::string GetCurrentLineText()const;
int GetTotalLines() const { return (int)mLines.size(); }
bool IsOverwrite() const { return mOverwrite; }
void SetReadOnly(bool aValue);
bool IsReadOnly() const { return mReadOnly; }
bool IsTextChanged() const { return mTextChanged; }
bool IsCursorPositionChanged() const { return mCursorPositionChanged; }
Coordinates GetCursorPosition() const { return GetActualCursorCoordinates(); }
void SetCursorPosition(const Coordinates& aPosition);
void InsertText(const std::string& aValue);
void InsertText(const char* aValue);
void MoveUp(int aAmount = 1, bool aSelect = false);
void MoveDown(int aAmount = 1, bool aSelect = false);
void MoveLeft(int aAmount = 1, bool aSelect = false, bool aWordMode = false);
void MoveRight(int aAmount = 1, bool aSelect = false, bool aWordMode = false);
void MoveTop(bool aSelect = false);
void MoveBottom(bool aSelect = false);
void MoveHome(bool aSelect = false);
void MoveEnd(bool aSelect = false);
void SetSelectionStart(const Coordinates& aPosition);
void SetSelectionEnd(const Coordinates& aPosition);
void SetSelection(const Coordinates& aStart, const Coordinates& aEnd, SelectionMode aMode = SelectionMode::Normal);
void SelectWordUnderCursor();
void SelectAll();
bool HasSelection() const;
void Copy();
void Cut();
void Paste();
void Delete();
bool CanUndo() const;
bool CanRedo() const;
void Undo(int aSteps = 1);
void Redo(int aSteps = 1);
static const Palette& GetDarkPalette();
static const Palette& GetLightPalette();
static const Palette& GetRetroBluePalette();
private:
typedef std::vector<std::pair<std::regex, PaletteIndex>> RegexList;
struct EditorState
{
Coordinates mSelectionStart;
Coordinates mSelectionEnd;
Coordinates mCursorPosition;
};
class UndoRecord
{
public:
UndoRecord() {}
~UndoRecord() {}
UndoRecord(
const std::string& aAdded,
const TextEditor::Coordinates aAddedStart,
const TextEditor::Coordinates aAddedEnd,
const std::string& aRemoved,
const TextEditor::Coordinates aRemovedStart,
const TextEditor::Coordinates aRemovedEnd,
TextEditor::EditorState& aBefore,
TextEditor::EditorState& aAfter);
void Undo(TextEditor* aEditor);
void Redo(TextEditor* aEditor);
std::string mAdded;
Coordinates mAddedStart;
Coordinates mAddedEnd;
std::string mRemoved;
Coordinates mRemovedStart;
Coordinates mRemovedEnd;
EditorState mBefore;
EditorState mAfter;
};
typedef std::vector<UndoRecord> UndoBuffer;
void ProcessInputs();
void Colorize(int aFromLine = 0, int aCount = -1);
void ColorizeRange(int aFromLine = 0, int aToLine = 0);
void ColorizeInternal();
float TextDistanceToLineStart(const Coordinates& aFrom) const;
void EnsureCursorVisible();
int GetPageSize() const;
int AppendBuffer(std::string& aBuffer, char chr, int aIndex);
std::string GetText(const Coordinates& aStart, const Coordinates& aEnd) const;
Coordinates GetActualCursorCoordinates() const;
Coordinates SanitizeCoordinates(const Coordinates& aValue) const;
void Advance(Coordinates& aCoordinates) const;
void DeleteRange(const Coordinates& aStart, const Coordinates& aEnd);
int InsertTextAt(Coordinates& aWhere, const char* aValue);
void AddUndo(UndoRecord& aValue);
Coordinates ScreenPosToCoordinates(const ImVec2& aPosition) const;
Coordinates FindWordStart(const Coordinates& aFrom) const;
Coordinates FindWordEnd(const Coordinates& aFrom) const;
bool IsOnWordBoundary(const Coordinates& aAt) const;
void RemoveLine(int aStart, int aEnd);
void RemoveLine(int aIndex);
Line& InsertLine(int aIndex);
void EnterCharacter(Char aChar);
void BackSpace();
void DeleteSelection();
std::string GetWordUnderCursor() const;
std::string GetWordAt(const Coordinates& aCoords) const;
float mLineSpacing;
Lines mLines;
EditorState mState;
UndoBuffer mUndoBuffer;
int mUndoIndex;
int mTabSize;
bool mOverwrite;
bool mReadOnly;
bool mWithinRender;
bool mScrollToCursor;
bool mTextChanged;
float mTextStart; // position (in pixels) where a code line starts relative to the left of the TextEditor.
int mLeftMargin;
bool mCursorPositionChanged;
int mColorRangeMin, mColorRangeMax;
SelectionMode mSelectionMode;
Palette mPalette;
LanguageDefinition mLanguageDefinition;
RegexList mRegexList;
bool mCheckMultilineComments;
Breakpoints mBreakpoints;
ErrorMarkers mErrorMarkers;
ImVec2 mCharAdvance;
Coordinates mInteractiveStart, mInteractiveEnd;
};