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393 lines
11 KiB
C++
393 lines
11 KiB
C++
#pragma once
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#include <string>
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#include <vector>
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#include <array>
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#include <memory>
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#include <unordered_set>
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#include <unordered_map>
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#include <map>
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#include <regex>
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#include "imgui.h"
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class CTextEditor
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{
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public:
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enum class PaletteIndex
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{
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Default,
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Keyword,
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Number,
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String,
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CharLiteral,
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Punctuation,
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Preprocessor,
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Identifier,
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KnownIdentifier,
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PreprocIdentifier,
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Comment,
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MultiLineComment,
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Background,
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Cursor,
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Selection,
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ErrorMarker,
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Breakpoint,
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LineNumber,
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CurrentLineFill,
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CurrentLineFillInactive,
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CurrentLineEdge,
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Max
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};
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enum class SelectionMode
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{
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Normal,
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Word,
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Line
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};
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struct Breakpoint
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{
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int mLine;
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bool mEnabled;
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std::string mCondition;
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Breakpoint()
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: mLine(-1)
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, mEnabled(false)
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{}
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};
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// Represents a character coordinate from the user's point of view,
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// i. e. consider an uniform grid (assuming fixed-width font) on the
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// screen as it is rendered, and each cell has its own coordinate, starting from 0.
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// Tabs are counted as [1..mTabSize] count empty spaces, depending on
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// how many space is necessary to reach the next tab stop.
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// For example, coordinate (1, 5) represents the character 'B' in a line "\tABC", when mTabSize = 4,
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// because it is rendered as " ABC" on the screen.
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struct Coordinates
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{
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Coordinates() : m_nLine(0), m_nColumn(0) {}
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Coordinates(int aLine, int aColumn) : m_nLine(aLine), m_nColumn(aColumn)
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{
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assert(aLine >= 0);
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assert(aColumn >= 0);
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}
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static Coordinates Invalid() { static Coordinates invalid(-1, -1); return invalid; }
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bool operator ==(const Coordinates& o) const
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{
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return
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m_nLine == o.m_nLine &&
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m_nColumn == o.m_nColumn;
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}
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bool operator !=(const Coordinates& o) const
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{
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return
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m_nLine != o.m_nLine ||
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m_nColumn != o.m_nColumn;
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}
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bool operator <(const Coordinates& o) const
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{
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if (m_nLine != o.m_nLine)
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return m_nLine < o.m_nLine;
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return m_nColumn < o.m_nColumn;
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}
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bool operator >(const Coordinates& o) const
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{
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if (m_nLine != o.m_nLine)
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return m_nLine > o.m_nLine;
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return m_nColumn > o.m_nColumn;
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}
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bool operator <=(const Coordinates& o) const
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{
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if (m_nLine != o.m_nLine)
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return m_nLine < o.m_nLine;
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return m_nColumn <= o.m_nColumn;
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}
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bool operator >=(const Coordinates& o) const
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{
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if (m_nLine != o.m_nLine)
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return m_nLine > o.m_nLine;
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return m_nColumn >= o.m_nColumn;
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}
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int m_nLine, m_nColumn;
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};
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struct Identifier
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{
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Coordinates m_Location;
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std::string m_svDeclaration;
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};
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typedef std::string String;
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typedef std::unordered_map<std::string, Identifier> Identifiers;
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typedef std::unordered_set<std::string> Keywords;
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typedef std::map<int, std::string> ErrorMarkers;
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typedef std::unordered_set<int> Breakpoints;
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typedef std::array<ImU32, (unsigned)PaletteIndex::Max> Palette;
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typedef uint8_t Char;
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struct Glyph
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{
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Char m_Char;
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PaletteIndex m_ColorIndex = PaletteIndex::Default;
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bool m_bComment : 1;
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bool m_bMultiLineComment : 1;
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bool m_bPreprocessor : 1;
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Glyph(Char aChar, PaletteIndex aColorIndex) : m_Char(aChar), m_ColorIndex(aColorIndex),
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m_bComment(false), m_bMultiLineComment(false), m_bPreprocessor(false) {}
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};
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typedef std::vector<Glyph> Line;
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typedef std::vector<Line> Lines;
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struct LanguageDefinition
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{
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typedef std::pair<std::string, PaletteIndex> TokenRegexString;
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typedef std::vector<TokenRegexString> TokenRegexStrings;
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typedef bool(*TokenizeCallback)(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end, PaletteIndex & paletteIndex);
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std::string m_svName;
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Keywords m_Keywords;
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Identifiers m_Identifiers;
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Identifiers m_PreprocIdentifiers;
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std::string m_svCommentStart, m_svCommentEnd, m_svSingleLineComment;
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char m_PreprocChar;
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bool m_bAutoIndentation;
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TokenizeCallback m_Tokenize;
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TokenRegexStrings m_TokenRegexStrings;
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bool mCaseSensitive;
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LanguageDefinition()
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: m_PreprocChar('#'), m_bAutoIndentation(true), m_Tokenize(nullptr), mCaseSensitive(true)
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{
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}
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static const LanguageDefinition& CPlusPlus();
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static const LanguageDefinition& HLSL();
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static const LanguageDefinition& GLSL();
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static const LanguageDefinition& C();
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static const LanguageDefinition& SQL();
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static const LanguageDefinition& AngelScript();
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static const LanguageDefinition& Lua();
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};
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CTextEditor();
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~CTextEditor();
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void SetLanguageDefinition(const LanguageDefinition& aLanguageDef);
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const LanguageDefinition& GetLanguageDefinition() const { return m_LanguageDefinition; }
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const Palette& GetPalette() const { return m_PaletteBase; }
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void SetPalette(const Palette& aValue);
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void SetErrorMarkers(const ErrorMarkers& aMarkers) { m_ErrorMarkers = aMarkers; }
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void SetBreakpoints(const Breakpoints& aMarkers) { m_Breakpoints = aMarkers; }
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void Render(const char* aTitle, const ImVec2& aSize = ImVec2(), bool aBorder = false);
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void SetText(const std::string& aText);
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std::string GetText() const;
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void SetTextLines(const std::vector<std::string>& aLines);
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std::vector<std::string> GetTextLines() const;
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std::string GetSelectedText() const;
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std::string GetCurrentLineText()const;
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int GetTotalLines() const { return (int)m_Lines.size(); }
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bool IsOverwrite() const { return m_Overwrite; }
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void SetReadOnly(bool aValue);
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bool IsReadOnly() const { return m_bReadOnly; }
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bool IsTextChanged() const { return m_bTextChanged; }
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bool IsCursorPositionChanged() const { return m_bCursorPositionChanged; }
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bool IsColorizerEnabled() const { return m_bColorizerEnabled; }
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void SetColorizerEnable(bool aValue);
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Coordinates GetCursorPosition() const { return GetActualCursorCoordinates(); }
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void SetCursorPosition(const Coordinates& aPosition);
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inline void SetHandleMouseInputs (bool aValue){ m_bHandleMouseInputs = aValue;}
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inline bool IsHandleMouseInputsEnabled() const { return m_bHandleMouseInputs; }
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inline void SetHandleKeyboardInputs (bool aValue){ m_bHandleKeyboardInputs = aValue;}
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inline bool IsHandleKeyboardInputsEnabled() const { return m_bHandleKeyboardInputs; }
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inline void SetImGuiChildIgnored (bool aValue){ m_bIgnoreImGuiChild = aValue;}
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inline bool IsImGuiChildIgnored() const { return m_bIgnoreImGuiChild; }
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inline void SetShowWhitespaces(bool aValue) { m_bShowWhitespaces = aValue; }
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inline bool IsShowingWhitespaces() const { return m_bShowWhitespaces; }
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void SetTabSize(int aValue);
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inline int GetTabSize() const { return m_nTabSize; }
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void InsertText(const std::string& aValue);
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void InsertText(const char* aValue);
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void MoveUp(int aAmount = 1, bool aSelect = false);
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void MoveDown(int aAmount = 1, bool aSelect = false);
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void MoveLeft(int aAmount = 1, bool aSelect = false, bool aWordMode = false);
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void MoveRight(int aAmount = 1, bool aSelect = false, bool aWordMode = false);
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void MoveTop(bool aSelect = false);
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void MoveBottom(bool aSelect = false);
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void MoveHome(bool aSelect = false);
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void MoveEnd(bool aSelect = false);
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void SetSelectionStart(const Coordinates& aPosition);
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void SetSelectionEnd(const Coordinates& aPosition);
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void SetSelection(const Coordinates& aStart, const Coordinates& aEnd, SelectionMode aMode = SelectionMode::Normal);
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void SelectWordUnderCursor();
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void SelectAll();
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bool HasSelection() const;
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void Copy();
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void Cut();
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void Paste();
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void Delete();
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bool CanUndo() const;
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bool CanRedo() const;
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void Undo(int aSteps = 1);
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void Redo(int aSteps = 1);
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static const Palette& GetDarkPalette();
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static const Palette& GetLightPalette();
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static const Palette& GetRetroBluePalette();
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private:
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typedef std::vector<std::pair<std::regex, PaletteIndex>> RegexList;
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struct EditorState
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{
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Coordinates m_SelectionStart;
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Coordinates m_SelectionEnd;
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Coordinates m_CursorPosition;
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};
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class UndoRecord
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{
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public:
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UndoRecord() {}
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~UndoRecord() {}
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UndoRecord(
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const std::string& aAdded,
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const CTextEditor::Coordinates aAddedStart,
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const CTextEditor::Coordinates aAddedEnd,
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const std::string& aRemoved,
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const CTextEditor::Coordinates aRemovedStart,
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const CTextEditor::Coordinates aRemovedEnd,
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CTextEditor::EditorState& aBefore,
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CTextEditor::EditorState& aAfter);
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void Undo(CTextEditor* aEditor);
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void Redo(CTextEditor* aEditor);
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std::string m_svAdded;
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Coordinates m_AddedStart;
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Coordinates m_AddedEnd;
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std::string m_svRemoved;
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Coordinates m_RemovedStart;
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Coordinates m_RemovedEnd;
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EditorState m_Before;
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EditorState m_After;
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};
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typedef std::vector<UndoRecord> UndoBuffer;
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void ProcessInputs();
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void Colorize(int aFromLine = 0, int aCount = -1);
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void ColorizeRange(int aFromLine = 0, int aToLine = 0);
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void ColorizeInternal();
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float TextDistanceToLineStart(const Coordinates& aFrom) const;
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void EnsureCursorVisible();
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int GetPageSize() const;
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std::string GetText(const Coordinates& aStart, const Coordinates& aEnd) const;
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Coordinates GetActualCursorCoordinates() const;
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Coordinates SanitizeCoordinates(const Coordinates& aValue) const;
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void Advance(Coordinates& aCoordinates) const;
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void DeleteRange(const Coordinates& aStart, const Coordinates& aEnd);
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int InsertTextAt(Coordinates& aWhere, const char* aValue);
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void AddUndo(UndoRecord& aValue);
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Coordinates ScreenPosToCoordinates(const ImVec2& aPosition) const;
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Coordinates FindWordStart(const Coordinates& aFrom) const;
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Coordinates FindWordEnd(const Coordinates& aFrom) const;
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Coordinates FindNextWord(const Coordinates& aFrom) const;
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int GetCharacterIndex(const Coordinates& aCoordinates) const;
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int GetCharacterColumn(int aLine, int aIndex) const;
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int GetLineCharacterCount(int aLine) const;
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int GetLineMaxColumn(int aLine) const;
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bool IsOnWordBoundary(const Coordinates& aAt) const;
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void RemoveLine(int aStart, int aEnd);
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void RemoveLine(int aIndex);
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Line& InsertLine(int aIndex);
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void EnterCharacter(ImWchar aChar, bool aShift);
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void Backspace();
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void DeleteSelection();
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std::string GetWordUnderCursor() const;
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std::string GetWordAt(const Coordinates& aCoords) const;
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ImU32 GetGlyphColor(const Glyph& aGlyph) const;
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void HandleKeyboardInputs();
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void HandleMouseInputs();
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void Render();
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float m_flLineSpacing;
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Lines m_Lines;
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EditorState m_State;
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UndoBuffer m_UndoBuffer;
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int m_nUndoIndex;
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int m_nTabSize;
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bool m_Overwrite;
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bool m_bReadOnly;
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bool m_bWithinRender;
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bool m_bScrollToCursor;
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bool m_bScrollToTop;
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bool m_bTextChanged;
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bool m_bColorizerEnabled;
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float m_flTextStart; // position (in pixels) where a code line starts relative to the left of the TextEditor.
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int m_nLeftMargin;
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bool m_bCursorPositionChanged;
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int m_nColorRangeMin;
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int m_nColorRangeMax;
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SelectionMode m_SelectionMode;
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bool m_bHandleKeyboardInputs;
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bool m_bHandleMouseInputs;
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bool m_bIgnoreImGuiChild;
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bool m_bShowWhitespaces;
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Palette m_PaletteBase;
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Palette m_Palette;
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LanguageDefinition m_LanguageDefinition;
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RegexList m_RegexList;
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bool m_bCheckComments;
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Breakpoints m_Breakpoints;
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ErrorMarkers m_ErrorMarkers;
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ImVec2 m_CharAdvance;
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Coordinates m_InteractiveStart;
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Coordinates m_InteractiveEnd;
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std::string m__svLineBuffer;
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uint64_t m_nStartTime;
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float m_flLastClick;
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};
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