395 lines
11 KiB
C
395 lines
11 KiB
C
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#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 TextEditor
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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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int mLine, mColumn;
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Coordinates() : mLine(0), mColumn(0) {}
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Coordinates(int aLine, int aColumn) : mLine(aLine), mColumn(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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mLine == o.mLine &&
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mColumn == o.mColumn;
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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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mLine != o.mLine ||
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mColumn != o.mColumn;
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}
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bool operator <(const Coordinates& o) const
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{
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if (mLine != o.mLine)
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return mLine < o.mLine;
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return mColumn < o.mColumn;
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}
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bool operator >(const Coordinates& o) const
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{
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if (mLine != o.mLine)
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return mLine > o.mLine;
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return mColumn > o.mColumn;
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}
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bool operator <=(const Coordinates& o) const
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{
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if (mLine != o.mLine)
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return mLine < o.mLine;
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return mColumn <= o.mColumn;
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}
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bool operator >=(const Coordinates& o) const
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{
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if (mLine != o.mLine)
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return mLine > o.mLine;
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return mColumn >= o.mColumn;
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}
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};
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struct Identifier
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{
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Coordinates mLocation;
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std::string mDeclaration;
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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 mChar;
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PaletteIndex mColorIndex = PaletteIndex::Default;
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bool mComment : 1;
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bool mMultiLineComment : 1;
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bool mPreprocessor : 1;
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Glyph(Char aChar, PaletteIndex aColorIndex) : mChar(aChar), mColorIndex(aColorIndex),
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mComment(false), mMultiLineComment(false), mPreprocessor(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 mName;
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Keywords mKeywords;
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Identifiers mIdentifiers;
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Identifiers mPreprocIdentifiers;
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std::string mCommentStart, mCommentEnd, mSingleLineComment;
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char mPreprocChar;
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bool mAutoIndentation;
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TokenizeCallback mTokenize;
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TokenRegexStrings mTokenRegexStrings;
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bool mCaseSensitive;
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LanguageDefinition()
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: mPreprocChar('#'), mAutoIndentation(true), mTokenize(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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TextEditor();
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~TextEditor();
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void SetLanguageDefinition(const LanguageDefinition& aLanguageDef);
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const LanguageDefinition& GetLanguageDefinition() const { return mLanguageDefinition; }
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const Palette& GetPalette() const { return mPaletteBase; }
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void SetPalette(const Palette& aValue);
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void SetErrorMarkers(const ErrorMarkers& aMarkers) { mErrorMarkers = aMarkers; }
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void SetBreakpoints(const Breakpoints& aMarkers) { mBreakpoints = 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)mLines.size(); }
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bool IsOverwrite() const { return mOverwrite; }
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void SetReadOnly(bool aValue);
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bool IsReadOnly() const { return mReadOnly; }
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bool IsTextChanged() const { return mTextChanged; }
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bool IsCursorPositionChanged() const { return mCursorPositionChanged; }
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bool IsColorizerEnabled() const { return mColorizerEnabled; }
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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){ mHandleMouseInputs = aValue;}
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inline bool IsHandleMouseInputsEnabled() const { return mHandleKeyboardInputs; }
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inline void SetHandleKeyboardInputs (bool aValue){ mHandleKeyboardInputs = aValue;}
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inline bool IsHandleKeyboardInputsEnabled() const { return mHandleKeyboardInputs; }
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inline void SetImGuiChildIgnored (bool aValue){ mIgnoreImGuiChild = aValue;}
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inline bool IsImGuiChildIgnored() const { return mIgnoreImGuiChild; }
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inline void SetShowWhitespaces(bool aValue) { mShowWhitespaces = aValue; }
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inline bool IsShowingWhitespaces() const { return mShowWhitespaces; }
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void SetTabSize(int aValue);
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inline int GetTabSize() const { return mTabSize; }
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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 mSelectionStart;
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Coordinates mSelectionEnd;
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Coordinates mCursorPosition;
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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 TextEditor::Coordinates aAddedStart,
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const TextEditor::Coordinates aAddedEnd,
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const std::string& aRemoved,
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const TextEditor::Coordinates aRemovedStart,
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const TextEditor::Coordinates aRemovedEnd,
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TextEditor::EditorState& aBefore,
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TextEditor::EditorState& aAfter);
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void Undo(TextEditor* aEditor);
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void Redo(TextEditor* aEditor);
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std::string mAdded;
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Coordinates mAddedStart;
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Coordinates mAddedEnd;
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std::string mRemoved;
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Coordinates mRemovedStart;
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Coordinates mRemovedEnd;
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EditorState mBefore;
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EditorState mAfter;
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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 mLineSpacing;
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Lines mLines;
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EditorState mState;
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UndoBuffer mUndoBuffer;
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int mUndoIndex;
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int mTabSize;
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bool mOverwrite;
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bool mReadOnly;
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bool mWithinRender;
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bool mScrollToCursor;
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bool mScrollToTop;
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bool mTextChanged;
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bool mColorizerEnabled;
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float mTextStart; // position (in pixels) where a code line starts relative to the left of the TextEditor.
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int mLeftMargin;
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bool mCursorPositionChanged;
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int mColorRangeMin, mColorRangeMax;
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SelectionMode mSelectionMode;
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bool mHandleKeyboardInputs;
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bool mHandleMouseInputs;
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bool mIgnoreImGuiChild;
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bool mShowWhitespaces;
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Palette mPaletteBase;
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Palette mPalette;
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LanguageDefinition mLanguageDefinition;
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RegexList mRegexList;
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bool mCheckComments;
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Breakpoints mBreakpoints;
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ErrorMarkers mErrorMarkers;
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ImVec2 mCharAdvance;
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Coordinates mInteractiveStart, mInteractiveEnd;
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std::string mLineBuffer;
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uint64_t mStartTime;
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float mLastClick;
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};
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bool TokenizeCStyleString(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end);
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bool TokenizeCStyleCharacterLiteral(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end);
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bool TokenizeCStyleIdentifier(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end);
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bool TokenizeCStyleNumber(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end);
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bool TokenizeCStylePunctuation(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end);
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