blob: 6e669dd4f91eb8af9e67aba498201b1ffd0009ed [file] [log] [blame]
#include <algorithm>
#include <chrono>
#include <string>
#include <regex>
#include <cmath>
#include "TextEditor.h"
#define IMGUI_DEFINE_MATH_OPERATORS
#include "imgui.h" // for imGui::GetCurrentWindow()
// TODO
// - multiline comments vs single-line: latter is blocking start of a ML
template<class InputIt1, class InputIt2, class BinaryPredicate>
bool equals(InputIt1 first1, InputIt1 last1,
InputIt2 first2, InputIt2 last2, BinaryPredicate p)
{
for (; first1 != last1 && first2 != last2; ++first1, ++first2)
{
if (!p(*first1, *first2))
return false;
}
return first1 == last1 && first2 == last2;
}
TextEditor::TextEditor()
: mLineSpacing(1.0f)
, mUndoIndex(0)
, mTabSize(4)
, mOverwrite(false)
, mReadOnly(false)
, mWithinRender(false)
, mScrollToCursor(false)
, mScrollToTop(false)
, mTextChanged(false)
, mColorizerEnabled(true)
, mTextStart(20.0f)
, mLeftMargin(10)
, mCursorPositionChanged(false)
, mColorRangeMin(0)
, mColorRangeMax(0)
, mSelectionMode(SelectionMode::Normal)
, mCheckComments(true)
, mLastClick(-1.0f)
, mHandleKeyboardInputs(true)
, mHandleMouseInputs(true)
, mIgnoreImGuiChild(false)
, mShowWhitespaces(true)
, mStartTime(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count())
{
SetPalette(GetDarkPalette());
SetLanguageDefinition(LanguageDefinition::HLSL());
mLines.push_back(Line());
}
TextEditor::~TextEditor()
{
}
void TextEditor::SetLanguageDefinition(const LanguageDefinition & aLanguageDef)
{
mLanguageDefinition = aLanguageDef;
mRegexList.clear();
for (auto& r : mLanguageDefinition.mTokenRegexStrings)
mRegexList.push_back(std::make_pair(std::regex(r.first, std::regex_constants::optimize), r.second));
Colorize();
}
void TextEditor::SetPalette(const Palette & aValue)
{
mPaletteBase = aValue;
}
std::string TextEditor::GetText(const Coordinates & aStart, const Coordinates & aEnd) const
{
std::string result;
auto lstart = aStart.mLine;
auto lend = aEnd.mLine;
auto istart = GetCharacterIndex(aStart);
auto iend = GetCharacterIndex(aEnd);
size_t s = 0;
for (size_t i = lstart; i < lend; i++)
s += mLines[i].size();
result.reserve(s + s / 8);
while (istart < iend || lstart < lend)
{
if (lstart >= (int)mLines.size())
break;
auto& line = mLines[lstart];
if (istart < (int)line.size())
{
result += line[istart].mChar;
istart++;
}
else
{
istart = 0;
++lstart;
result += '\n';
}
}
return result;
}
TextEditor::Coordinates TextEditor::GetActualCursorCoordinates() const
{
return SanitizeCoordinates(mState.mCursorPosition);
}
TextEditor::Coordinates TextEditor::SanitizeCoordinates(const Coordinates & aValue) const
{
auto line = aValue.mLine;
auto column = aValue.mColumn;
if (line >= (int)mLines.size())
{
if (mLines.empty())
{
line = 0;
column = 0;
}
else
{
line = (int)mLines.size() - 1;
column = GetLineMaxColumn(line);
}
return Coordinates(line, column);
}
else
{
column = mLines.empty() ? 0 : std::min(column, GetLineMaxColumn(line));
return Coordinates(line, column);
}
}
// https://en.wikipedia.org/wiki/UTF-8
// We assume that the char is a standalone character (<128) or a leading byte of an UTF-8 code sequence (non-10xxxxxx code)
static int UTF8CharLength(TextEditor::Char c)
{
if ((c & 0xFE) == 0xFC)
return 6;
if ((c & 0xFC) == 0xF8)
return 5;
if ((c & 0xF8) == 0xF0)
return 4;
else if ((c & 0xF0) == 0xE0)
return 3;
else if ((c & 0xE0) == 0xC0)
return 2;
return 1;
}
// "Borrowed" from ImGui source
static inline int ImTextCharToUtf8(char* buf, int buf_size, unsigned int c)
{
if (c < 0x80)
{
buf[0] = (char)c;
return 1;
}
if (c < 0x800)
{
if (buf_size < 2) return 0;
buf[0] = (char)(0xc0 + (c >> 6));
buf[1] = (char)(0x80 + (c & 0x3f));
return 2;
}
if (c >= 0xdc00 && c < 0xe000)
{
return 0;
}
if (c >= 0xd800 && c < 0xdc00)
{
if (buf_size < 4) return 0;
buf[0] = (char)(0xf0 + (c >> 18));
buf[1] = (char)(0x80 + ((c >> 12) & 0x3f));
buf[2] = (char)(0x80 + ((c >> 6) & 0x3f));
buf[3] = (char)(0x80 + ((c) & 0x3f));
return 4;
}
//else if (c < 0x10000)
{
if (buf_size < 3) return 0;
buf[0] = (char)(0xe0 + (c >> 12));
buf[1] = (char)(0x80 + ((c >> 6) & 0x3f));
buf[2] = (char)(0x80 + ((c) & 0x3f));
return 3;
}
}
void TextEditor::Advance(Coordinates & aCoordinates) const
{
if (aCoordinates.mLine < (int)mLines.size())
{
auto& line = mLines[aCoordinates.mLine];
auto cindex = GetCharacterIndex(aCoordinates);
if (cindex + 1 < (int)line.size())
{
auto delta = UTF8CharLength(line[cindex].mChar);
cindex = std::min(cindex + delta, (int)line.size() - 1);
}
else
{
++aCoordinates.mLine;
cindex = 0;
}
aCoordinates.mColumn = GetCharacterColumn(aCoordinates.mLine, cindex);
}
}
void TextEditor::DeleteRange(const Coordinates & aStart, const Coordinates & aEnd)
{
assert(aEnd >= aStart);
assert(!mReadOnly);
//printf("D(%d.%d)-(%d.%d)\n", aStart.mLine, aStart.mColumn, aEnd.mLine, aEnd.mColumn);
if (aEnd == aStart)
return;
auto start = GetCharacterIndex(aStart);
auto end = GetCharacterIndex(aEnd);
if (aStart.mLine == aEnd.mLine)
{
auto& line = mLines[aStart.mLine];
auto n = GetLineMaxColumn(aStart.mLine);
if (aEnd.mColumn >= n)
line.erase(line.begin() + start, line.end());
else
line.erase(line.begin() + start, line.begin() + end);
}
else
{
auto& firstLine = mLines[aStart.mLine];
auto& lastLine = mLines[aEnd.mLine];
firstLine.erase(firstLine.begin() + start, firstLine.end());
lastLine.erase(lastLine.begin(), lastLine.begin() + end);
if (aStart.mLine < aEnd.mLine)
firstLine.insert(firstLine.end(), lastLine.begin(), lastLine.end());
if (aStart.mLine < aEnd.mLine)
RemoveLine(aStart.mLine + 1, aEnd.mLine + 1);
}
mTextChanged = true;
}
int TextEditor::InsertTextAt(Coordinates& /* inout */ aWhere, const char * aValue)
{
assert(!mReadOnly);
int cindex = GetCharacterIndex(aWhere);
int totalLines = 0;
while (*aValue != '\0')
{
assert(!mLines.empty());
if (*aValue == '\r')
{
// skip
++aValue;
}
else if (*aValue == '\n')
{
if (cindex < (int)mLines[aWhere.mLine].size())
{
auto& newLine = InsertLine(aWhere.mLine + 1);
auto& line = mLines[aWhere.mLine];
newLine.insert(newLine.begin(), line.begin() + cindex, line.end());
line.erase(line.begin() + cindex, line.end());
}
else
{
InsertLine(aWhere.mLine + 1);
}
++aWhere.mLine;
aWhere.mColumn = 0;
cindex = 0;
++totalLines;
++aValue;
}
else
{
auto& line = mLines[aWhere.mLine];
auto d = UTF8CharLength(*aValue);
while (d-- > 0 && *aValue != '\0')
line.insert(line.begin() + cindex++, Glyph(*aValue++, PaletteIndex::Default));
++aWhere.mColumn;
}
mTextChanged = true;
}
return totalLines;
}
void TextEditor::AddUndo(UndoRecord& aValue)
{
assert(!mReadOnly);
//printf("AddUndo: (@%d.%d) +\'%s' [%d.%d .. %d.%d], -\'%s', [%d.%d .. %d.%d] (@%d.%d)\n",
// aValue.mBefore.mCursorPosition.mLine, aValue.mBefore.mCursorPosition.mColumn,
// aValue.mAdded.c_str(), aValue.mAddedStart.mLine, aValue.mAddedStart.mColumn, aValue.mAddedEnd.mLine, aValue.mAddedEnd.mColumn,
// aValue.mRemoved.c_str(), aValue.mRemovedStart.mLine, aValue.mRemovedStart.mColumn, aValue.mRemovedEnd.mLine, aValue.mRemovedEnd.mColumn,
// aValue.mAfter.mCursorPosition.mLine, aValue.mAfter.mCursorPosition.mColumn
// );
mUndoBuffer.resize((size_t)(mUndoIndex + 1));
mUndoBuffer.back() = aValue;
++mUndoIndex;
}
TextEditor::Coordinates TextEditor::ScreenPosToCoordinates(const ImVec2& aPosition) const
{
ImVec2 origin = ImGui::GetCursorScreenPos();
ImVec2 local(aPosition.x - origin.x, aPosition.y - origin.y);
int lineNo = std::max(0, (int)floor(local.y / mCharAdvance.y));
int columnCoord = 0;
if (lineNo >= 0 && lineNo < (int)mLines.size())
{
auto& line = mLines.at(lineNo);
int columnIndex = 0;
float columnX = 0.0f;
while ((size_t)columnIndex < line.size())
{
float columnWidth = 0.0f;
if (line[columnIndex].mChar == '\t')
{
float spaceSize = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, " ").x;
float oldX = columnX;
float newColumnX = (1.0f + std::floor((1.0f + columnX) / (float(mTabSize) * spaceSize))) * (float(mTabSize) * spaceSize);
columnWidth = newColumnX - oldX;
if (mTextStart + columnX + columnWidth * 0.5f > local.x)
break;
columnX = newColumnX;
columnCoord = (columnCoord / mTabSize) * mTabSize + mTabSize;
columnIndex++;
}
else
{
char buf[7];
auto d = UTF8CharLength(line[columnIndex].mChar);
int i = 0;
while (i < 6 && d-- > 0)
buf[i++] = line[columnIndex++].mChar;
buf[i] = '\0';
columnWidth = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, buf).x;
if (mTextStart + columnX + columnWidth * 0.5f > local.x)
break;
columnX += columnWidth;
columnCoord++;
}
}
}
return SanitizeCoordinates(Coordinates(lineNo, columnCoord));
}
TextEditor::Coordinates TextEditor::FindWordStart(const Coordinates & aFrom) const
{
Coordinates at = aFrom;
if (at.mLine >= (int)mLines.size())
return at;
auto& line = mLines[at.mLine];
auto cindex = GetCharacterIndex(at);
if (cindex >= (int)line.size())
return at;
while (cindex > 0 && isspace(line[cindex].mChar))
--cindex;
auto cstart = (PaletteIndex)line[cindex].mColorIndex;
while (cindex > 0)
{
auto c = line[cindex].mChar;
if ((c & 0xC0) != 0x80) // not UTF code sequence 10xxxxxx
{
if (c <= 32 && isspace(c))
{
cindex++;
break;
}
if (cstart != (PaletteIndex)line[size_t(cindex - 1)].mColorIndex)
break;
}
--cindex;
}
return Coordinates(at.mLine, GetCharacterColumn(at.mLine, cindex));
}
TextEditor::Coordinates TextEditor::FindWordEnd(const Coordinates & aFrom) const
{
Coordinates at = aFrom;
if (at.mLine >= (int)mLines.size())
return at;
auto& line = mLines[at.mLine];
auto cindex = GetCharacterIndex(at);
if (cindex >= (int)line.size())
return at;
bool prevspace = (bool)isspace(line[cindex].mChar);
auto cstart = (PaletteIndex)line[cindex].mColorIndex;
while (cindex < (int)line.size())
{
auto c = line[cindex].mChar;
auto d = UTF8CharLength(c);
if (cstart != (PaletteIndex)line[cindex].mColorIndex)
break;
if (prevspace != !!isspace(c))
{
if (isspace(c))
while (cindex < (int)line.size() && isspace(line[cindex].mChar))
++cindex;
break;
}
cindex += d;
}
return Coordinates(aFrom.mLine, GetCharacterColumn(aFrom.mLine, cindex));
}
TextEditor::Coordinates TextEditor::FindNextWord(const Coordinates & aFrom) const
{
Coordinates at = aFrom;
if (at.mLine >= (int)mLines.size())
return at;
// skip to the next non-word character
auto cindex = GetCharacterIndex(aFrom);
bool isword = false;
bool skip = false;
if (cindex < (int)mLines[at.mLine].size())
{
auto& line = mLines[at.mLine];
isword = isalnum(line[cindex].mChar);
skip = isword;
}
while (!isword || skip)
{
if (at.mLine >= mLines.size())
{
auto l = std::max(0, (int) mLines.size() - 1);
return Coordinates(l, GetLineMaxColumn(l));
}
auto& line = mLines[at.mLine];
if (cindex < (int)line.size())
{
isword = isalnum(line[cindex].mChar);
if (isword && !skip)
return Coordinates(at.mLine, GetCharacterColumn(at.mLine, cindex));
if (!isword)
skip = false;
cindex++;
}
else
{
cindex = 0;
++at.mLine;
skip = false;
isword = false;
}
}
return at;
}
int TextEditor::GetCharacterIndex(const Coordinates& aCoordinates) const
{
if (aCoordinates.mLine >= mLines.size())
return -1;
auto& line = mLines[aCoordinates.mLine];
int c = 0;
int i = 0;
for (; i < line.size() && c < aCoordinates.mColumn;)
{
if (line[i].mChar == '\t')
c = (c / mTabSize) * mTabSize + mTabSize;
else
++c;
i += UTF8CharLength(line[i].mChar);
}
return i;
}
int TextEditor::GetCharacterColumn(int aLine, int aIndex) const
{
if (aLine >= mLines.size())
return 0;
auto& line = mLines[aLine];
int col = 0;
int i = 0;
while (i < aIndex && i < (int)line.size())
{
auto c = line[i].mChar;
i += UTF8CharLength(c);
if (c == '\t')
col = (col / mTabSize) * mTabSize + mTabSize;
else
col++;
}
return col;
}
int TextEditor::GetLineCharacterCount(int aLine) const
{
if (aLine >= mLines.size())
return 0;
auto& line = mLines[aLine];
int c = 0;
for (unsigned i = 0; i < line.size(); c++)
i += UTF8CharLength(line[i].mChar);
return c;
}
int TextEditor::GetLineMaxColumn(int aLine) const
{
if (aLine >= mLines.size())
return 0;
auto& line = mLines[aLine];
int col = 0;
for (unsigned i = 0; i < line.size(); )
{
auto c = line[i].mChar;
if (c == '\t')
col = (col / mTabSize) * mTabSize + mTabSize;
else
col++;
i += UTF8CharLength(c);
}
return col;
}
bool TextEditor::IsOnWordBoundary(const Coordinates & aAt) const
{
if (aAt.mLine >= (int)mLines.size() || aAt.mColumn == 0)
return true;
auto& line = mLines[aAt.mLine];
auto cindex = GetCharacterIndex(aAt);
if (cindex >= (int)line.size())
return true;
if (mColorizerEnabled)
return line[cindex].mColorIndex != line[size_t(cindex - 1)].mColorIndex;
return isspace(line[cindex].mChar) != isspace(line[cindex - 1].mChar);
}
void TextEditor::RemoveLine(int aStart, int aEnd)
{
assert(!mReadOnly);
assert(aEnd >= aStart);
assert(mLines.size() > (size_t)(aEnd - aStart));
ErrorMarkers etmp;
for (auto& i : mErrorMarkers)
{
ErrorMarkers::value_type e(i.first >= aStart ? i.first - 1 : i.first, i.second);
if (e.first >= aStart && e.first <= aEnd)
continue;
etmp.insert(e);
}
mErrorMarkers = std::move(etmp);
Breakpoints btmp;
for (auto i : mBreakpoints)
{
if (i >= aStart && i <= aEnd)
continue;
btmp.insert(i >= aStart ? i - 1 : i);
}
mBreakpoints = std::move(btmp);
mLines.erase(mLines.begin() + aStart, mLines.begin() + aEnd);
assert(!mLines.empty());
mTextChanged = true;
}
void TextEditor::RemoveLine(int aIndex)
{
assert(!mReadOnly);
assert(mLines.size() > 1);
ErrorMarkers etmp;
for (auto& i : mErrorMarkers)
{
ErrorMarkers::value_type e(i.first > aIndex ? i.first - 1 : i.first, i.second);
if (e.first - 1 == aIndex)
continue;
etmp.insert(e);
}
mErrorMarkers = std::move(etmp);
Breakpoints btmp;
for (auto i : mBreakpoints)
{
if (i == aIndex)
continue;
btmp.insert(i >= aIndex ? i - 1 : i);
}
mBreakpoints = std::move(btmp);
mLines.erase(mLines.begin() + aIndex);
assert(!mLines.empty());
mTextChanged = true;
}
TextEditor::Line& TextEditor::InsertLine(int aIndex)
{
assert(!mReadOnly);
auto& result = *mLines.insert(mLines.begin() + aIndex, Line());
ErrorMarkers etmp;
for (auto& i : mErrorMarkers)
etmp.insert(ErrorMarkers::value_type(i.first >= aIndex ? i.first + 1 : i.first, i.second));
mErrorMarkers = std::move(etmp);
Breakpoints btmp;
for (auto i : mBreakpoints)
btmp.insert(i >= aIndex ? i + 1 : i);
mBreakpoints = std::move(btmp);
return result;
}
std::string TextEditor::GetWordUnderCursor() const
{
auto c = GetCursorPosition();
return GetWordAt(c);
}
std::string TextEditor::GetWordAt(const Coordinates & aCoords) const
{
auto start = FindWordStart(aCoords);
auto end = FindWordEnd(aCoords);
std::string r;
auto istart = GetCharacterIndex(start);
auto iend = GetCharacterIndex(end);
for (auto it = istart; it < iend; ++it)
r.push_back(mLines[aCoords.mLine][it].mChar);
return r;
}
ImU32 TextEditor::GetGlyphColor(const Glyph & aGlyph) const
{
if (!mColorizerEnabled)
return mPalette[(int)PaletteIndex::Default];
if (aGlyph.mComment)
return mPalette[(int)PaletteIndex::Comment];
if (aGlyph.mMultiLineComment)
return mPalette[(int)PaletteIndex::MultiLineComment];
auto const color = mPalette[(int)aGlyph.mColorIndex];
if (aGlyph.mPreprocessor)
{
const auto ppcolor = mPalette[(int)PaletteIndex::Preprocessor];
const int c0 = ((ppcolor & 0xff) + (color & 0xff)) / 2;
const int c1 = (((ppcolor >> 8) & 0xff) + ((color >> 8) & 0xff)) / 2;
const int c2 = (((ppcolor >> 16) & 0xff) + ((color >> 16) & 0xff)) / 2;
const int c3 = (((ppcolor >> 24) & 0xff) + ((color >> 24) & 0xff)) / 2;
return ImU32(c0 | (c1 << 8) | (c2 << 16) | (c3 << 24));
}
return color;
}
void TextEditor::HandleKeyboardInputs()
{
ImGuiIO& io = ImGui::GetIO();
auto shift = io.KeyShift;
auto ctrl = io.ConfigMacOSXBehaviors ? io.KeySuper : io.KeyCtrl;
auto alt = io.ConfigMacOSXBehaviors ? io.KeyCtrl : io.KeyAlt;
if (ImGui::IsWindowFocused())
{
if (ImGui::IsWindowHovered())
ImGui::SetMouseCursor(ImGuiMouseCursor_TextInput);
//ImGui::CaptureKeyboardFromApp(true);
io.WantCaptureKeyboard = true;
io.WantTextInput = true;
if (!IsReadOnly() && ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Z)))
Undo();
else if (!IsReadOnly() && !ctrl && !shift && alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Backspace)))
Undo();
else if (!IsReadOnly() && ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Y)))
Redo();
else if (!ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_UpArrow)))
MoveUp(1, shift);
else if (!ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_DownArrow)))
MoveDown(1, shift);
else if (!alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_LeftArrow)))
MoveLeft(1, shift, ctrl);
else if (!alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_RightArrow)))
MoveRight(1, shift, ctrl);
else if (!alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_PageUp)))
MoveUp(GetPageSize() - 4, shift);
else if (!alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_PageDown)))
MoveDown(GetPageSize() - 4, shift);
else if (!alt && ctrl && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Home)))
MoveTop(shift);
else if (ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_End)))
MoveBottom(shift);
else if (!ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Home)))
MoveHome(shift);
else if (!ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_End)))
MoveEnd(shift);
else if (!IsReadOnly() && !ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Delete)))
Delete();
else if (!IsReadOnly() && !ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Backspace)))
Backspace();
else if (!ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Insert)))
mOverwrite ^= true;
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Insert)))
Copy();
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_C)))
Copy();
else if (!IsReadOnly() && !ctrl && shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Insert)))
Paste();
else if (!IsReadOnly() && ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_V)))
Paste();
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_X)))
Cut();
else if (!ctrl && shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Delete)))
Cut();
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_A)))
SelectAll();
else if (!IsReadOnly() && !ctrl && !shift && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Enter)))
EnterCharacter('\n', false);
else if (!IsReadOnly() && !ctrl && !alt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Tab)))
EnterCharacter('\t', shift);
if (!IsReadOnly() && !io.InputQueueCharacters.empty())
{
for (int i = 0; i < io.InputQueueCharacters.Size; i++)
{
auto c = io.InputQueueCharacters[i];
if (c != 0 && (c == '\n' || c >= 32))
EnterCharacter(c, shift);
}
io.InputQueueCharacters.resize(0);
}
}
}
void TextEditor::HandleMouseInputs()
{
ImGuiIO& io = ImGui::GetIO();
auto shift = io.KeyShift;
auto ctrl = io.ConfigMacOSXBehaviors ? io.KeySuper : io.KeyCtrl;
auto alt = io.ConfigMacOSXBehaviors ? io.KeyCtrl : io.KeyAlt;
if (ImGui::IsWindowHovered())
{
if (!shift && !alt)
{
auto click = ImGui::IsMouseClicked(0);
auto doubleClick = ImGui::IsMouseDoubleClicked(0);
auto t = ImGui::GetTime();
auto tripleClick = click && !doubleClick && (mLastClick != -1.0f && (t - mLastClick) < io.MouseDoubleClickTime);
/*
Left mouse button triple click
*/
if (tripleClick)
{
if (!ctrl)
{
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = ScreenPosToCoordinates(ImGui::GetMousePos());
mSelectionMode = SelectionMode::Line;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
mLastClick = -1.0f;
}
/*
Left mouse button double click
*/
else if (doubleClick)
{
if (!ctrl)
{
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = ScreenPosToCoordinates(ImGui::GetMousePos());
if (mSelectionMode == SelectionMode::Line)
mSelectionMode = SelectionMode::Normal;
else
mSelectionMode = SelectionMode::Word;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
mLastClick = (float)ImGui::GetTime();
}
/*
Left mouse button click
*/
else if (click)
{
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = ScreenPosToCoordinates(ImGui::GetMousePos());
if (ctrl)
mSelectionMode = SelectionMode::Word;
else
mSelectionMode = SelectionMode::Normal;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
mLastClick = (float)ImGui::GetTime();
}
// Mouse left button dragging (=> update selection)
else if (ImGui::IsMouseDragging(0) && ImGui::IsMouseDown(0))
{
io.WantCaptureMouse = true;
mState.mCursorPosition = mInteractiveEnd = ScreenPosToCoordinates(ImGui::GetMousePos());
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
}
}
}
void TextEditor::Render()
{
/* Compute mCharAdvance regarding to scaled font size (Ctrl + mouse wheel)*/
const float fontSize = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, "#", nullptr, nullptr).x;
mCharAdvance = ImVec2(fontSize, ImGui::GetTextLineHeightWithSpacing() * mLineSpacing);
/* Update palette with the current alpha from style */
for (int i = 0; i < (int)PaletteIndex::Max; ++i)
{
auto color = ImGui::ColorConvertU32ToFloat4(mPaletteBase[i]);
color.w *= ImGui::GetStyle().Alpha;
mPalette[i] = ImGui::ColorConvertFloat4ToU32(color);
}
assert(mLineBuffer.empty());
auto contentSize = ImGui::GetWindowContentRegionMax();
auto drawList = ImGui::GetWindowDrawList();
float longest(mTextStart);
if (mScrollToTop)
{
mScrollToTop = false;
ImGui::SetScrollY(0.f);
}
ImVec2 cursorScreenPos = ImGui::GetCursorScreenPos();
auto scrollX = ImGui::GetScrollX();
auto scrollY = ImGui::GetScrollY();
auto lineNo = (int)floor(scrollY / mCharAdvance.y);
auto globalLineMax = (int)mLines.size();
auto lineMax = std::max(0, std::min((int)mLines.size() - 1, lineNo + (int)floor((scrollY + contentSize.y) / mCharAdvance.y)));
// Deduce mTextStart by evaluating mLines size (global lineMax) plus two spaces as text width
char buf[16];
snprintf(buf, 16, " %d ", globalLineMax);
mTextStart = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, buf, nullptr, nullptr).x + mLeftMargin;
if (!mLines.empty())
{
float spaceSize = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, " ", nullptr, nullptr).x;
while (lineNo <= lineMax)
{
ImVec2 lineStartScreenPos = ImVec2(cursorScreenPos.x, cursorScreenPos.y + lineNo * mCharAdvance.y);
ImVec2 textScreenPos = ImVec2(lineStartScreenPos.x + mTextStart, lineStartScreenPos.y);
auto& line = mLines[lineNo];
longest = std::max(mTextStart + TextDistanceToLineStart(Coordinates(lineNo, GetLineMaxColumn(lineNo))), longest);
auto columnNo = 0;
Coordinates lineStartCoord(lineNo, 0);
Coordinates lineEndCoord(lineNo, GetLineMaxColumn(lineNo));
// Draw selection for the current line
float sstart = -1.0f;
float ssend = -1.0f;
assert(mState.mSelectionStart <= mState.mSelectionEnd);
if (mState.mSelectionStart <= lineEndCoord)
sstart = mState.mSelectionStart > lineStartCoord ? TextDistanceToLineStart(mState.mSelectionStart) : 0.0f;
if (mState.mSelectionEnd > lineStartCoord)
ssend = TextDistanceToLineStart(mState.mSelectionEnd < lineEndCoord ? mState.mSelectionEnd : lineEndCoord);
if (mState.mSelectionEnd.mLine > lineNo)
ssend += mCharAdvance.x;
if (sstart != -1 && ssend != -1 && sstart < ssend)
{
ImVec2 vstart(lineStartScreenPos.x + mTextStart + sstart, lineStartScreenPos.y);
ImVec2 vend(lineStartScreenPos.x + mTextStart + ssend, lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(vstart, vend, mPalette[(int)PaletteIndex::Selection]);
}
// Draw breakpoints
auto start = ImVec2(lineStartScreenPos.x + scrollX, lineStartScreenPos.y);
if (mBreakpoints.count(lineNo + 1) != 0)
{
auto end = ImVec2(lineStartScreenPos.x + contentSize.x + 2.0f * scrollX, lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(start, end, mPalette[(int)PaletteIndex::Breakpoint]);
}
// Draw error markers
auto errorIt = mErrorMarkers.find(lineNo + 1);
if (errorIt != mErrorMarkers.end())
{
auto end = ImVec2(lineStartScreenPos.x + contentSize.x + 2.0f * scrollX, lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(start, end, mPalette[(int)PaletteIndex::ErrorMarker]);
if (ImGui::IsMouseHoveringRect(lineStartScreenPos, end))
{
ImGui::BeginTooltip();
ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(1.0f, 0.2f, 0.2f, 1.0f));
ImGui::Text("Error at line %d:", errorIt->first);
ImGui::PopStyleColor();
ImGui::Separator();
ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(1.0f, 1.0f, 0.2f, 1.0f));
ImGui::Text("%s", errorIt->second.c_str());
ImGui::PopStyleColor();
ImGui::EndTooltip();
}
}
// Draw line number (right aligned)
snprintf(buf, 16, "%d ", lineNo + 1);
auto lineNoWidth = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, buf, nullptr, nullptr).x;
drawList->AddText(ImVec2(lineStartScreenPos.x + mTextStart - lineNoWidth, lineStartScreenPos.y), mPalette[(int)PaletteIndex::LineNumber], buf);
if (mState.mCursorPosition.mLine == lineNo)
{
auto focused = ImGui::IsWindowFocused();
// Highlight the current line (where the cursor is)
if (!HasSelection())
{
auto end = ImVec2(start.x + contentSize.x + scrollX, start.y + mCharAdvance.y);
drawList->AddRectFilled(start, end, mPalette[(int)(focused ? PaletteIndex::CurrentLineFill : PaletteIndex::CurrentLineFillInactive)]);
drawList->AddRect(start, end, mPalette[(int)PaletteIndex::CurrentLineEdge], 1.0f);
}
// Render the cursor
if (focused)
{
auto timeEnd = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
auto elapsed = timeEnd - mStartTime;
if (elapsed > 400)
{
float width = 1.0f;
auto cindex = GetCharacterIndex(mState.mCursorPosition);
float cx = TextDistanceToLineStart(mState.mCursorPosition);
if (mOverwrite && cindex < (int)line.size())
{
auto c = line[cindex].mChar;
if (c == '\t')
{
auto x = (1.0f + std::floor((1.0f + cx) / (float(mTabSize) * spaceSize))) * (float(mTabSize) * spaceSize);
width = x - cx;
}
else
{
char buf[2];
buf[0] = line[cindex].mChar;
buf[1] = '\0';
width = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, buf).x;
}
}
ImVec2 cstart(textScreenPos.x + cx, lineStartScreenPos.y);
ImVec2 cend(textScreenPos.x + cx + width, lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(cstart, cend, mPalette[(int)PaletteIndex::Cursor]);
if (elapsed > 800)
mStartTime = timeEnd;
}
}
}
// Render colorized text
auto prevColor = line.empty() ? mPalette[(int)PaletteIndex::Default] : GetGlyphColor(line[0]);
ImVec2 bufferOffset;
for (int i = 0; i < line.size();)
{
auto& glyph = line[i];
auto color = GetGlyphColor(glyph);
if ((color != prevColor || glyph.mChar == '\t' || glyph.mChar == ' ') && !mLineBuffer.empty())
{
const ImVec2 newOffset(textScreenPos.x + bufferOffset.x, textScreenPos.y + bufferOffset.y);
drawList->AddText(newOffset, prevColor, mLineBuffer.c_str());
auto textSize = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, mLineBuffer.c_str(), nullptr, nullptr);
bufferOffset.x += textSize.x;
mLineBuffer.clear();
}
prevColor = color;
if (glyph.mChar == '\t')
{
auto oldX = bufferOffset.x;
bufferOffset.x = (1.0f + std::floor((1.0f + bufferOffset.x) / (float(mTabSize) * spaceSize))) * (float(mTabSize) * spaceSize);
++i;
if (mShowWhitespaces)
{
const auto s = ImGui::GetFontSize();
const auto x1 = textScreenPos.x + oldX + 1.0f;
const auto x2 = textScreenPos.x + bufferOffset.x - 1.0f;
const auto y = textScreenPos.y + bufferOffset.y + s * 0.5f;
const ImVec2 p1(x1, y);
const ImVec2 p2(x2, y);
const ImVec2 p3(x2 - s * 0.2f, y - s * 0.2f);
const ImVec2 p4(x2 - s * 0.2f, y + s * 0.2f);
drawList->AddLine(p1, p2, 0x90909090);
drawList->AddLine(p2, p3, 0x90909090);
drawList->AddLine(p2, p4, 0x90909090);
}
}
else if (glyph.mChar == ' ')
{
if (mShowWhitespaces)
{
const auto s = ImGui::GetFontSize();
const auto x = textScreenPos.x + bufferOffset.x + spaceSize * 0.5f;
const auto y = textScreenPos.y + bufferOffset.y + s * 0.5f;
drawList->AddCircleFilled(ImVec2(x, y), 1.5f, 0x80808080, 4);
}
bufferOffset.x += spaceSize;
i++;
}
else
{
auto l = UTF8CharLength(glyph.mChar);
while (l-- > 0)
mLineBuffer.push_back(line[i++].mChar);
}
++columnNo;
}
if (!mLineBuffer.empty())
{
const ImVec2 newOffset(textScreenPos.x + bufferOffset.x, textScreenPos.y + bufferOffset.y);
drawList->AddText(newOffset, prevColor, mLineBuffer.c_str());
mLineBuffer.clear();
}
++lineNo;
}
// Draw a tooltip on known identifiers/preprocessor symbols
if (ImGui::IsMousePosValid())
{
auto id = GetWordAt(ScreenPosToCoordinates(ImGui::GetMousePos()));
if (!id.empty())
{
auto it = mLanguageDefinition.mIdentifiers.find(id);
if (it != mLanguageDefinition.mIdentifiers.end())
{
ImGui::BeginTooltip();
ImGui::TextUnformatted(it->second.mDeclaration.c_str());
ImGui::EndTooltip();
}
else
{
auto pi = mLanguageDefinition.mPreprocIdentifiers.find(id);
if (pi != mLanguageDefinition.mPreprocIdentifiers.end())
{
ImGui::BeginTooltip();
ImGui::TextUnformatted(pi->second.mDeclaration.c_str());
ImGui::EndTooltip();
}
}
}
}
}
ImGui::Dummy(ImVec2((longest + 2), mLines.size() * mCharAdvance.y));
if (mScrollToCursor)
{
EnsureCursorVisible();
ImGui::SetWindowFocus();
mScrollToCursor = false;
}
}
void TextEditor::Render(const char* aTitle, const ImVec2& aSize, bool aBorder)
{
mWithinRender = true;
mTextChanged = false;
mCursorPositionChanged = false;
ImGui::PushStyleColor(ImGuiCol_ChildWindowBg, ImGui::ColorConvertU32ToFloat4(mPalette[(int)PaletteIndex::Background]));
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0.0f, 0.0f));
if (!mIgnoreImGuiChild)
ImGui::BeginChild(aTitle, aSize, aBorder, ImGuiWindowFlags_HorizontalScrollbar | ImGuiWindowFlags_AlwaysHorizontalScrollbar | ImGuiWindowFlags_NoMove);
if (mHandleKeyboardInputs)
{
HandleKeyboardInputs();
ImGui::PushAllowKeyboardFocus(true);
}
if (mHandleMouseInputs)
HandleMouseInputs();
ColorizeInternal();
Render();
if (mHandleKeyboardInputs)
ImGui::PopAllowKeyboardFocus();
if (!mIgnoreImGuiChild)
ImGui::EndChild();
ImGui::PopStyleVar();
ImGui::PopStyleColor();
mWithinRender = false;
}
void TextEditor::SetText(const std::string & aText)
{
mLines.clear();
mLines.emplace_back(Line());
for (auto chr : aText)
{
if (chr == '\r')
{
// ignore the carriage return character
}
else if (chr == '\n')
mLines.emplace_back(Line());
else
{
mLines.back().emplace_back(Glyph(chr, PaletteIndex::Default));
}
}
mTextChanged = true;
mScrollToTop = true;
mUndoBuffer.clear();
mUndoIndex = 0;
Colorize();
}
void TextEditor::SetTextLines(const std::vector<std::string> & aLines)
{
mLines.clear();
if (aLines.empty())
{
mLines.emplace_back(Line());
}
else
{
mLines.resize(aLines.size());
for (size_t i = 0; i < aLines.size(); ++i)
{
const std::string & aLine = aLines[i];
mLines[i].reserve(aLine.size());
for (size_t j = 0; j < aLine.size(); ++j)
mLines[i].emplace_back(Glyph(aLine[j], PaletteIndex::Default));
}
}
mTextChanged = true;
mScrollToTop = true;
mUndoBuffer.clear();
mUndoIndex = 0;
Colorize();
}
void TextEditor::EnterCharacter(ImWchar aChar, bool aShift)
{
assert(!mReadOnly);
UndoRecord u;
u.mBefore = mState;
if (HasSelection())
{
if (aChar == '\t' && mState.mSelectionStart.mLine != mState.mSelectionEnd.mLine)
{
auto start = mState.mSelectionStart;
auto end = mState.mSelectionEnd;
auto originalEnd = end;
if (start > end)
std::swap(start, end);
start.mColumn = 0;
// end.mColumn = end.mLine < mLines.size() ? mLines[end.mLine].size() : 0;
if (end.mColumn == 0 && end.mLine > 0)
--end.mLine;
if (end.mLine >= (int)mLines.size())
end.mLine = mLines.empty() ? 0 : (int)mLines.size() - 1;
end.mColumn = GetLineMaxColumn(end.mLine);
//if (end.mColumn >= GetLineMaxColumn(end.mLine))
// end.mColumn = GetLineMaxColumn(end.mLine) - 1;
u.mRemovedStart = start;
u.mRemovedEnd = end;
u.mRemoved = GetText(start, end);
bool modified = false;
for (int i = start.mLine; i <= end.mLine; i++)
{
auto& line = mLines[i];
if (aShift)
{
if (!line.empty())
{
if (line.front().mChar == '\t')
{
line.erase(line.begin());
modified = true;
}
else
{
for (int j = 0; j < mTabSize && !line.empty() && line.front().mChar == ' '; j++)
{
line.erase(line.begin());
modified = true;
}
}
}
}
else
{
line.insert(line.begin(), Glyph('\t', TextEditor::PaletteIndex::Background));
modified = true;
}
}
if (modified)
{
start = Coordinates(start.mLine, GetCharacterColumn(start.mLine, 0));
Coordinates rangeEnd;
if (originalEnd.mColumn != 0)
{
end = Coordinates(end.mLine, GetLineMaxColumn(end.mLine));
rangeEnd = end;
u.mAdded = GetText(start, end);
}
else
{
end = Coordinates(originalEnd.mLine, 0);
rangeEnd = Coordinates(end.mLine - 1, GetLineMaxColumn(end.mLine - 1));
u.mAdded = GetText(start, rangeEnd);
}
u.mAddedStart = start;
u.mAddedEnd = rangeEnd;
u.mAfter = mState;
mState.mSelectionStart = start;
mState.mSelectionEnd = end;
AddUndo(u);
mTextChanged = true;
EnsureCursorVisible();
}
return;
} // c == '\t'
else
{
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
DeleteSelection();
}
} // HasSelection
auto coord = GetActualCursorCoordinates();
u.mAddedStart = coord;
assert(!mLines.empty());
if (aChar == '\n')
{
InsertLine(coord.mLine + 1);
auto& line = mLines[coord.mLine];
auto& newLine = mLines[coord.mLine + 1];
if (mLanguageDefinition.mAutoIndentation)
for (size_t it = 0; it < line.size() && isascii(line[it].mChar) && isblank(line[it].mChar); ++it)
newLine.push_back(line[it]);
const size_t whitespaceSize = newLine.size();
auto cindex = GetCharacterIndex(coord);
newLine.insert(newLine.end(), line.begin() + cindex, line.end());
line.erase(line.begin() + cindex, line.begin() + line.size());
SetCursorPosition(Coordinates(coord.mLine + 1, GetCharacterColumn(coord.mLine + 1, (int)whitespaceSize)));
u.mAdded = (char)aChar;
}
else
{
char buf[7];
int e = ImTextCharToUtf8(buf, 7, aChar);
if (e > 0)
{
buf[e] = '\0';
auto& line = mLines[coord.mLine];
auto cindex = GetCharacterIndex(coord);
if (mOverwrite && cindex < (int)line.size())
{
auto d = UTF8CharLength(line[cindex].mChar);
u.mRemovedStart = mState.mCursorPosition;
u.mRemovedEnd = Coordinates(coord.mLine, GetCharacterColumn(coord.mLine, cindex + d));
while (d-- > 0 && cindex < (int)line.size())
{
u.mRemoved += line[cindex].mChar;
line.erase(line.begin() + cindex);
}
}
for (auto p = buf; *p != '\0'; p++, ++cindex)
line.insert(line.begin() + cindex, Glyph(*p, PaletteIndex::Default));
u.mAdded = buf;
SetCursorPosition(Coordinates(coord.mLine, GetCharacterColumn(coord.mLine, cindex)));
}
else
return;
}
mTextChanged = true;
u.mAddedEnd = GetActualCursorCoordinates();
u.mAfter = mState;
AddUndo(u);
Colorize(coord.mLine - 1, 3);
EnsureCursorVisible();
}
void TextEditor::SetReadOnly(bool aValue)
{
mReadOnly = aValue;
}
void TextEditor::SetColorizerEnable(bool aValue)
{
mColorizerEnabled = aValue;
}
void TextEditor::SetCursorPosition(const Coordinates & aPosition)
{
if (mState.mCursorPosition != aPosition)
{
mState.mCursorPosition = aPosition;
mCursorPositionChanged = true;
EnsureCursorVisible();
}
}
void TextEditor::SetSelectionStart(const Coordinates & aPosition)
{
mState.mSelectionStart = SanitizeCoordinates(aPosition);
if (mState.mSelectionStart > mState.mSelectionEnd)
std::swap(mState.mSelectionStart, mState.mSelectionEnd);
}
void TextEditor::SetSelectionEnd(const Coordinates & aPosition)
{
mState.mSelectionEnd = SanitizeCoordinates(aPosition);
if (mState.mSelectionStart > mState.mSelectionEnd)
std::swap(mState.mSelectionStart, mState.mSelectionEnd);
}
void TextEditor::SetSelection(const Coordinates & aStart, const Coordinates & aEnd, SelectionMode aMode)
{
auto oldSelStart = mState.mSelectionStart;
auto oldSelEnd = mState.mSelectionEnd;
mState.mSelectionStart = SanitizeCoordinates(aStart);
mState.mSelectionEnd = SanitizeCoordinates(aEnd);
if (mState.mSelectionStart > mState.mSelectionEnd)
std::swap(mState.mSelectionStart, mState.mSelectionEnd);
switch (aMode)
{
case TextEditor::SelectionMode::Normal:
break;
case TextEditor::SelectionMode::Word:
{
mState.mSelectionStart = FindWordStart(mState.mSelectionStart);
if (!IsOnWordBoundary(mState.mSelectionEnd))
mState.mSelectionEnd = FindWordEnd(FindWordStart(mState.mSelectionEnd));
break;
}
case TextEditor::SelectionMode::Line:
{
const auto lineNo = mState.mSelectionEnd.mLine;
const auto lineSize = (size_t)lineNo < mLines.size() ? mLines[lineNo].size() : 0;
mState.mSelectionStart = Coordinates(mState.mSelectionStart.mLine, 0);
mState.mSelectionEnd = Coordinates(lineNo, GetLineMaxColumn(lineNo));
break;
}
default:
break;
}
if (mState.mSelectionStart != oldSelStart ||
mState.mSelectionEnd != oldSelEnd)
mCursorPositionChanged = true;
}
void TextEditor::SetTabSize(int aValue)
{
mTabSize = std::max(0, std::min(32, aValue));
}
void TextEditor::InsertText(const std::string & aValue)
{
InsertText(aValue.c_str());
}
void TextEditor::InsertText(const char * aValue)
{
if (aValue == nullptr)
return;
auto pos = GetActualCursorCoordinates();
auto start = std::min(pos, mState.mSelectionStart);
int totalLines = pos.mLine - start.mLine;
totalLines += InsertTextAt(pos, aValue);
SetSelection(pos, pos);
SetCursorPosition(pos);
Colorize(start.mLine - 1, totalLines + 2);
}
void TextEditor::DeleteSelection()
{
assert(mState.mSelectionEnd >= mState.mSelectionStart);
if (mState.mSelectionEnd == mState.mSelectionStart)
return;
DeleteRange(mState.mSelectionStart, mState.mSelectionEnd);
SetSelection(mState.mSelectionStart, mState.mSelectionStart);
SetCursorPosition(mState.mSelectionStart);
Colorize(mState.mSelectionStart.mLine, 1);
}
void TextEditor::MoveUp(int aAmount, bool aSelect)
{
auto oldPos = mState.mCursorPosition;
mState.mCursorPosition.mLine = std::max(0, mState.mCursorPosition.mLine - aAmount);
if (oldPos != mState.mCursorPosition)
{
if (aSelect)
{
if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else if (oldPos == mInteractiveEnd)
mInteractiveEnd = mState.mCursorPosition;
else
{
mInteractiveStart = mState.mCursorPosition;
mInteractiveEnd = oldPos;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd);
EnsureCursorVisible();
}
}
void TextEditor::MoveDown(int aAmount, bool aSelect)
{
assert(mState.mCursorPosition.mColumn >= 0);
auto oldPos = mState.mCursorPosition;
mState.mCursorPosition.mLine = std::max(0, std::min((int)mLines.size() - 1, mState.mCursorPosition.mLine + aAmount));
if (mState.mCursorPosition != oldPos)
{
if (aSelect)
{
if (oldPos == mInteractiveEnd)
mInteractiveEnd = mState.mCursorPosition;
else if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else
{
mInteractiveStart = oldPos;
mInteractiveEnd = mState.mCursorPosition;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd);
EnsureCursorVisible();
}
}
static bool IsUTFSequence(char c)
{
return (c & 0xC0) == 0x80;
}
void TextEditor::MoveLeft(int aAmount, bool aSelect, bool aWordMode)
{
if (mLines.empty())
return;
auto oldPos = mState.mCursorPosition;
mState.mCursorPosition = GetActualCursorCoordinates();
auto line = mState.mCursorPosition.mLine;
auto cindex = GetCharacterIndex(mState.mCursorPosition);
while (aAmount-- > 0)
{
if (cindex == 0)
{
if (line > 0)
{
--line;
if ((int)mLines.size() > line)
cindex = (int)mLines[line].size();
else
cindex = 0;
}
}
else
{
--cindex;
if (cindex > 0)
{
if ((int)mLines.size() > line)
{
while (cindex > 0 && IsUTFSequence(mLines[line][cindex].mChar))
--cindex;
}
}
}
mState.mCursorPosition = Coordinates(line, GetCharacterColumn(line, cindex));
if (aWordMode)
{
mState.mCursorPosition = FindWordStart(mState.mCursorPosition);
cindex = GetCharacterIndex(mState.mCursorPosition);
}
}
mState.mCursorPosition = Coordinates(line, GetCharacterColumn(line, cindex));
assert(mState.mCursorPosition.mColumn >= 0);
if (aSelect)
{
if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else if (oldPos == mInteractiveEnd)
mInteractiveEnd = mState.mCursorPosition;
else
{
mInteractiveStart = mState.mCursorPosition;
mInteractiveEnd = oldPos;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd, aSelect && aWordMode ? SelectionMode::Word : SelectionMode::Normal);
EnsureCursorVisible();
}
void TextEditor::MoveRight(int aAmount, bool aSelect, bool aWordMode)
{
auto oldPos = mState.mCursorPosition;
if (mLines.empty() || oldPos.mLine >= mLines.size())
return;
auto cindex = GetCharacterIndex(mState.mCursorPosition);
while (aAmount-- > 0)
{
auto lindex = mState.mCursorPosition.mLine;
auto& line = mLines[lindex];
if (cindex >= line.size())
{
if (mState.mCursorPosition.mLine < mLines.size() - 1)
{
mState.mCursorPosition.mLine = std::max(0, std::min((int)mLines.size() - 1, mState.mCursorPosition.mLine + 1));
mState.mCursorPosition.mColumn = 0;
}
else
return;
}
else
{
cindex += UTF8CharLength(line[cindex].mChar);
mState.mCursorPosition = Coordinates(lindex, GetCharacterColumn(lindex, cindex));
if (aWordMode)
mState.mCursorPosition = FindNextWord(mState.mCursorPosition);
}
}
if (aSelect)
{
if (oldPos == mInteractiveEnd)
mInteractiveEnd = SanitizeCoordinates(mState.mCursorPosition);
else if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else
{
mInteractiveStart = oldPos;
mInteractiveEnd = mState.mCursorPosition;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd, aSelect && aWordMode ? SelectionMode::Word : SelectionMode::Normal);
EnsureCursorVisible();
}
void TextEditor::MoveTop(bool aSelect)
{
auto oldPos = mState.mCursorPosition;
SetCursorPosition(Coordinates(0, 0));
if (mState.mCursorPosition != oldPos)
{
if (aSelect)
{
mInteractiveEnd = oldPos;
mInteractiveStart = mState.mCursorPosition;
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd);
}
}
void TextEditor::TextEditor::MoveBottom(bool aSelect)
{
auto oldPos = GetCursorPosition();
auto newPos = Coordinates((int)mLines.size() - 1, 0);
SetCursorPosition(newPos);
if (aSelect)
{
mInteractiveStart = oldPos;
mInteractiveEnd = newPos;
}
else
mInteractiveStart = mInteractiveEnd = newPos;
SetSelection(mInteractiveStart, mInteractiveEnd);
}
void TextEditor::MoveHome(bool aSelect)
{
auto oldPos = mState.mCursorPosition;
SetCursorPosition(Coordinates(mState.mCursorPosition.mLine, 0));
if (mState.mCursorPosition != oldPos)
{
if (aSelect)
{
if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else if (oldPos == mInteractiveEnd)
mInteractiveEnd = mState.mCursorPosition;
else
{
mInteractiveStart = mState.mCursorPosition;
mInteractiveEnd = oldPos;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd);
}
}
void TextEditor::MoveEnd(bool aSelect)
{
auto oldPos = mState.mCursorPosition;
SetCursorPosition(Coordinates(mState.mCursorPosition.mLine, GetLineMaxColumn(oldPos.mLine)));
if (mState.mCursorPosition != oldPos)
{
if (aSelect)
{
if (oldPos == mInteractiveEnd)
mInteractiveEnd = mState.mCursorPosition;
else if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else
{
mInteractiveStart = oldPos;
mInteractiveEnd = mState.mCursorPosition;
}
}
else
mInteractiveStart = mInteractiveEnd = mState.mCursorPosition;
SetSelection(mInteractiveStart, mInteractiveEnd);
}
}
void TextEditor::Delete()
{
assert(!mReadOnly);
if (mLines.empty())
return;
UndoRecord u;
u.mBefore = mState;
if (HasSelection())
{
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
DeleteSelection();
}
else
{
auto pos = GetActualCursorCoordinates();
SetCursorPosition(pos);
auto& line = mLines[pos.mLine];
if (pos.mColumn == GetLineMaxColumn(pos.mLine))
{
if (pos.mLine == (int)mLines.size() - 1)
return;
u.mRemoved = '\n';
u.mRemovedStart = u.mRemovedEnd = GetActualCursorCoordinates();
Advance(u.mRemovedEnd);
auto& nextLine = mLines[pos.mLine + 1];
line.insert(line.end(), nextLine.begin(), nextLine.end());
RemoveLine(pos.mLine + 1);
}
else
{
auto cindex = GetCharacterIndex(pos);
u.mRemovedStart = u.mRemovedEnd = GetActualCursorCoordinates();
u.mRemovedEnd.mColumn++;
u.mRemoved = GetText(u.mRemovedStart, u.mRemovedEnd);
auto d = UTF8CharLength(line[cindex].mChar);
while (d-- > 0 && cindex < (int)line.size())
line.erase(line.begin() + cindex);
}
mTextChanged = true;
Colorize(pos.mLine, 1);
}
u.mAfter = mState;
AddUndo(u);
}
void TextEditor::Backspace()
{
assert(!mReadOnly);
if (mLines.empty())
return;
UndoRecord u;
u.mBefore = mState;
if (HasSelection())
{
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
DeleteSelection();
}
else
{
auto pos = GetActualCursorCoordinates();
SetCursorPosition(pos);
if (mState.mCursorPosition.mColumn == 0)
{
if (mState.mCursorPosition.mLine == 0)
return;
u.mRemoved = '\n';
u.mRemovedStart = u.mRemovedEnd = Coordinates(pos.mLine - 1, GetLineMaxColumn(pos.mLine - 1));
Advance(u.mRemovedEnd);
auto& line = mLines[mState.mCursorPosition.mLine];
auto& prevLine = mLines[mState.mCursorPosition.mLine - 1];
auto prevSize = GetLineMaxColumn(mState.mCursorPosition.mLine - 1);
prevLine.insert(prevLine.end(), line.begin(), line.end());
ErrorMarkers etmp;
for (auto& i : mErrorMarkers)
etmp.insert(ErrorMarkers::value_type(i.first - 1 == mState.mCursorPosition.mLine ? i.first - 1 : i.first, i.second));
mErrorMarkers = std::move(etmp);
RemoveLine(mState.mCursorPosition.mLine);
--mState.mCursorPosition.mLine;
mState.mCursorPosition.mColumn = prevSize;
}
else
{
auto& line = mLines[mState.mCursorPosition.mLine];
auto cindex = GetCharacterIndex(pos) - 1;
auto cend = cindex + 1;
while (cindex > 0 && IsUTFSequence(line[cindex].mChar))
--cindex;
//if (cindex > 0 && UTF8CharLength(line[cindex].mChar) > 1)
// --cindex;
u.mRemovedStart = u.mRemovedEnd = GetActualCursorCoordinates();
--u.mRemovedStart.mColumn;
--mState.mCursorPosition.mColumn;
while (cindex < line.size() && cend-- > cindex)
{
u.mRemoved += line[cindex].mChar;
line.erase(line.begin() + cindex);
}
}
mTextChanged = true;
EnsureCursorVisible();
Colorize(mState.mCursorPosition.mLine, 1);
}
u.mAfter = mState;
AddUndo(u);
}
void TextEditor::SelectWordUnderCursor()
{
auto c = GetCursorPosition();
SetSelection(FindWordStart(c), FindWordEnd(c));
}
void TextEditor::SelectAll()
{
SetSelection(Coordinates(0, 0), Coordinates((int)mLines.size(), 0));
}
bool TextEditor::HasSelection() const
{
return mState.mSelectionEnd > mState.mSelectionStart;
}
void TextEditor::Copy()
{
if (HasSelection())
{
ImGui::SetClipboardText(GetSelectedText().c_str());
}
else
{
if (!mLines.empty())
{
std::string str;
auto& line = mLines[GetActualCursorCoordinates().mLine];
for (auto& g : line)
str.push_back(g.mChar);
ImGui::SetClipboardText(str.c_str());
}
}
}
void TextEditor::Cut()
{
if (IsReadOnly())
{
Copy();
}
else
{
if (HasSelection())
{
UndoRecord u;
u.mBefore = mState;
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
Copy();
DeleteSelection();
u.mAfter = mState;
AddUndo(u);
}
}
}
void TextEditor::Paste()
{
if (IsReadOnly())
return;
auto clipText = ImGui::GetClipboardText();
if (clipText != nullptr && strlen(clipText) > 0)
{
UndoRecord u;
u.mBefore = mState;
if (HasSelection())
{
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
DeleteSelection();
}
u.mAdded = clipText;
u.mAddedStart = GetActualCursorCoordinates();
InsertText(clipText);
u.mAddedEnd = GetActualCursorCoordinates();
u.mAfter = mState;
AddUndo(u);
}
}
bool TextEditor::CanUndo() const
{
return !mReadOnly && mUndoIndex > 0;
}
bool TextEditor::CanRedo() const
{
return !mReadOnly && mUndoIndex < (int)mUndoBuffer.size();
}
void TextEditor::Undo(int aSteps)
{
while (CanUndo() && aSteps-- > 0)
mUndoBuffer[--mUndoIndex].Undo(this);
}
void TextEditor::Redo(int aSteps)
{
while (CanRedo() && aSteps-- > 0)
mUndoBuffer[mUndoIndex++].Redo(this);
}
const TextEditor::Palette & TextEditor::GetDarkPalette()
{
const static Palette p = { {
0xff7f7f7f, // Default
0xffd69c56, // Keyword
0xff00ff00, // Number
0xff7070e0, // String
0xff70a0e0, // Char literal
0xffffffff, // Punctuation
0xff408080, // Preprocessor
0xffaaaaaa, // Identifier
0xff9bc64d, // Known identifier
0xffc040a0, // Preproc identifier
0xff206020, // Comment (single line)
0xff406020, // Comment (multi line)
0xff101010, // Background
0xffe0e0e0, // Cursor
0x80a06020, // Selection
0x800020ff, // ErrorMarker
0x40f08000, // Breakpoint
0xff707000, // Line number
0x40000000, // Current line fill
0x40808080, // Current line fill (inactive)
0x40a0a0a0, // Current line edge
} };
return p;
}
const TextEditor::Palette & TextEditor::GetLightPalette()
{
const static Palette p = { {
0xff7f7f7f, // None
0xffff0c06, // Keyword
0xff008000, // Number
0xff2020a0, // String
0xff304070, // Char literal
0xff000000, // Punctuation
0xff406060, // Preprocessor
0xff404040, // Identifier
0xff606010, // Known identifier
0xffc040a0, // Preproc identifier
0xff205020, // Comment (single line)
0xff405020, // Comment (multi line)
0xffffffff, // Background
0xff000000, // Cursor
0x80600000, // Selection
0xa00010ff, // ErrorMarker
0x80f08000, // Breakpoint
0xff505000, // Line number
0x40000000, // Current line fill
0x40808080, // Current line fill (inactive)
0x40000000, // Current line edge
} };
return p;
}
const TextEditor::Palette & TextEditor::GetRetroBluePalette()
{
const static Palette p = { {
0xff00ffff, // None
0xffffff00, // Keyword
0xff00ff00, // Number
0xff808000, // String
0xff808000, // Char literal
0xffffffff, // Punctuation
0xff008000, // Preprocessor
0xff00ffff, // Identifier
0xffffffff, // Known identifier
0xffff00ff, // Preproc identifier
0xff808080, // Comment (single line)
0xff404040, // Comment (multi line)
0xff800000, // Background
0xff0080ff, // Cursor
0x80ffff00, // Selection
0xa00000ff, // ErrorMarker
0x80ff8000, // Breakpoint
0xff808000, // Line number
0x40000000, // Current line fill
0x40808080, // Current line fill (inactive)
0x40000000, // Current line edge
} };
return p;
}
std::string TextEditor::GetText() const
{
return GetText(Coordinates(), Coordinates((int)mLines.size(), 0));
}
std::vector<std::string> TextEditor::GetTextLines() const
{
std::vector<std::string> result;
result.reserve(mLines.size());
for (auto & line : mLines)
{
std::string text;
text.resize(line.size());
for (size_t i = 0; i < line.size(); ++i)
text[i] = line[i].mChar;
result.emplace_back(std::move(text));
}
return result;
}
std::string TextEditor::GetSelectedText() const
{
return GetText(mState.mSelectionStart, mState.mSelectionEnd);
}
std::string TextEditor::GetCurrentLineText()const
{
auto lineLength = GetLineMaxColumn(mState.mCursorPosition.mLine);
return GetText(
Coordinates(mState.mCursorPosition.mLine, 0),
Coordinates(mState.mCursorPosition.mLine, lineLength));
}
void TextEditor::ProcessInputs()
{
}
void TextEditor::Colorize(int aFromLine, int aLines)
{
int toLine = aLines == -1 ? (int)mLines.size() : std::min((int)mLines.size(), aFromLine + aLines);
mColorRangeMin = std::min(mColorRangeMin, aFromLine);
mColorRangeMax = std::max(mColorRangeMax, toLine);
mColorRangeMin = std::max(0, mColorRangeMin);
mColorRangeMax = std::max(mColorRangeMin, mColorRangeMax);
mCheckComments = true;
}
void TextEditor::ColorizeRange(int aFromLine, int aToLine)
{
if (mLines.empty() || aFromLine >= aToLine)
return;
std::string buffer;
std::cmatch results;
std::string id;
int endLine = std::max(0, std::min((int)mLines.size(), aToLine));
for (int i = aFromLine; i < endLine; ++i)
{
auto& line = mLines[i];
if (line.empty())
continue;
buffer.resize(line.size());
for (size_t j = 0; j < line.size(); ++j)
{
auto& col = line[j];
buffer[j] = col.mChar;
col.mColorIndex = PaletteIndex::Default;
}
const char * bufferBegin = &buffer.front();
const char * bufferEnd = bufferBegin + buffer.size();
auto last = bufferEnd;
for (auto first = bufferBegin; first != last; )
{
const char * token_begin = nullptr;
const char * token_end = nullptr;
PaletteIndex token_color = PaletteIndex::Default;
bool hasTokenizeResult = false;
if (mLanguageDefinition.mTokenize != nullptr)
{
if (mLanguageDefinition.mTokenize(first, last, token_begin, token_end, token_color))
hasTokenizeResult = true;
}
if (hasTokenizeResult == false)
{
// todo : remove
//printf("using regex for %.*s\n", first + 10 < last ? 10 : int(last - first), first);
for (auto& p : mRegexList)
{
if (std::regex_search(first, last, results, p.first, std::regex_constants::match_continuous))
{
hasTokenizeResult = true;
auto& v = *results.begin();
token_begin = v.first;
token_end = v.second;
token_color = p.second;
break;
}
}
}
if (hasTokenizeResult == false)
{
first++;
}
else
{
const size_t token_length = token_end - token_begin;
if (token_color == PaletteIndex::Identifier)
{
id.assign(token_begin, token_end);
// todo : allmost all language definitions use lower case to specify keywords, so shouldn't this use ::tolower ?
if (!mLanguageDefinition.mCaseSensitive)
std::transform(id.begin(), id.end(), id.begin(), ::toupper);
if (!line[first - bufferBegin].mPreprocessor)
{
if (mLanguageDefinition.mKeywords.count(id) != 0)
token_color = PaletteIndex::Keyword;
else if (mLanguageDefinition.mIdentifiers.count(id) != 0)
token_color = PaletteIndex::KnownIdentifier;
else if (mLanguageDefinition.mPreprocIdentifiers.count(id) != 0)
token_color = PaletteIndex::PreprocIdentifier;
}
else
{
if (mLanguageDefinition.mPreprocIdentifiers.count(id) != 0)
token_color = PaletteIndex::PreprocIdentifier;
}
}
for (size_t j = 0; j < token_length; ++j)
line[(token_begin - bufferBegin) + j].mColorIndex = token_color;
first = token_end;
}
}
}
}
void TextEditor::ColorizeInternal()
{
if (mLines.empty() || !mColorizerEnabled)
return;
if (mCheckComments)
{
auto endLine = mLines.size();
auto endIndex = 0;
auto commentStartLine = endLine;
auto commentStartIndex = endIndex;
auto withinString = false;
auto withinSingleLineComment = false;
auto withinPreproc = false;
auto firstChar = true; // there is no other non-whitespace characters in the line before
auto concatenate = false; // '\' on the very end of the line
auto currentLine = 0;
auto currentIndex = 0;
while (currentLine < endLine || currentIndex < endIndex)
{
auto& line = mLines[currentLine];
if (currentIndex == 0 && !concatenate)
{
withinSingleLineComment = false;
withinPreproc = false;
firstChar = true;
}
concatenate = false;
if (!line.empty())
{
auto& g = line[currentIndex];
auto c = g.mChar;
if (c != mLanguageDefinition.mPreprocChar && !isspace(c))
firstChar = false;
if (currentIndex == (int)line.size() - 1 && line[line.size() - 1].mChar == '\\')
concatenate = true;
bool inComment = (commentStartLine < currentLine || (commentStartLine == currentLine && commentStartIndex <= currentIndex));
if (withinString)
{
line[currentIndex].mMultiLineComment = inComment;
if (c == '\"')
{
if (currentIndex + 1 < (int)line.size() && line[currentIndex + 1].mChar == '\"')
{
currentIndex += 1;
if (currentIndex < (int)line.size())
line[currentIndex].mMultiLineComment = inComment;
}
else
withinString = false;
}
else if (c == '\\')
{
currentIndex += 1;
if (currentIndex < (int)line.size())
line[currentIndex].mMultiLineComment = inComment;
}
}
else
{
if (firstChar && c == mLanguageDefinition.mPreprocChar)
withinPreproc = true;
if (c == '\"')
{
withinString = true;
line[currentIndex].mMultiLineComment = inComment;
}
else
{
auto pred = [](const char& a, const Glyph& b) { return a == b.mChar; };
auto from = line.begin() + currentIndex;
auto& startStr = mLanguageDefinition.mCommentStart;
auto& singleStartStr = mLanguageDefinition.mSingleLineComment;
if (singleStartStr.size() > 0 &&
currentIndex + singleStartStr.size() <= line.size() &&
equals(singleStartStr.begin(), singleStartStr.end(), from, from + singleStartStr.size(), pred))
{
withinSingleLineComment = true;
}
else if (!withinSingleLineComment && currentIndex + startStr.size() <= line.size() &&
equals(startStr.begin(), startStr.end(), from, from + startStr.size(), pred))
{
commentStartLine = currentLine;
commentStartIndex = currentIndex;
}
inComment = inComment = (commentStartLine < currentLine || (commentStartLine == currentLine && commentStartIndex <= currentIndex));
line[currentIndex].mMultiLineComment = inComment;
line[currentIndex].mComment = withinSingleLineComment;
auto& endStr = mLanguageDefinition.mCommentEnd;
if (currentIndex + 1 >= (int)endStr.size() &&
equals(endStr.begin(), endStr.end(), from + 1 - endStr.size(), from + 1, pred))
{
commentStartIndex = endIndex;
commentStartLine = endLine;
}
}
}
line[currentIndex].mPreprocessor = withinPreproc;
currentIndex += UTF8CharLength(c);
if (currentIndex >= (int)line.size())
{
currentIndex = 0;
++currentLine;
}
}
else
{
currentIndex = 0;
++currentLine;
}
}
mCheckComments = false;
}
if (mColorRangeMin < mColorRangeMax)
{
const int increment = (mLanguageDefinition.mTokenize == nullptr) ? 10 : 10000;
const int to = std::min(mColorRangeMin + increment, mColorRangeMax);
ColorizeRange(mColorRangeMin, to);
mColorRangeMin = to;
if (mColorRangeMax == mColorRangeMin)
{
mColorRangeMin = std::numeric_limits<int>::max();
mColorRangeMax = 0;
}
return;
}
}
float TextEditor::TextDistanceToLineStart(const Coordinates& aFrom) const
{
auto& line = mLines[aFrom.mLine];
float distance = 0.0f;
float spaceSize = ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, " ", nullptr, nullptr).x;
int colIndex = GetCharacterIndex(aFrom);
for (size_t it = 0u; it < line.size() && it < colIndex; )
{
if (line[it].mChar == '\t')
{
distance = (1.0f + std::floor((1.0f + distance) / (float(mTabSize) * spaceSize))) * (float(mTabSize) * spaceSize);
++it;
}
else
{
auto d = UTF8CharLength(line[it].mChar);
char tempCString[7];
int i = 0;
for (; i < 6 && d-- > 0 && it < (int)line.size(); i++, it++)
tempCString[i] = line[it].mChar;
tempCString[i] = '\0';
distance += ImGui::GetFont()->CalcTextSizeA(ImGui::GetFontSize(), FLT_MAX, -1.0f, tempCString, nullptr, nullptr).x;
}
}
return distance;
}
void TextEditor::EnsureCursorVisible()
{
if (!mWithinRender)
{
mScrollToCursor = true;
return;
}
float scrollX = ImGui::GetScrollX();
float scrollY = ImGui::GetScrollY();
auto height = ImGui::GetWindowHeight();
auto width = ImGui::GetWindowWidth();
auto top = 1 + (int)ceil(scrollY / mCharAdvance.y);
auto bottom = (int)ceil((scrollY + height) / mCharAdvance.y);
auto left = (int)ceil(scrollX / mCharAdvance.x);
auto right = (int)ceil((scrollX + width) / mCharAdvance.x);
auto pos = GetActualCursorCoordinates();
auto len = TextDistanceToLineStart(pos);
if (pos.mLine < top)
ImGui::SetScrollY(std::max(0.0f, (pos.mLine - 1) * mCharAdvance.y));
if (pos.mLine > bottom - 4)
ImGui::SetScrollY(std::max(0.0f, (pos.mLine + 4) * mCharAdvance.y - height));
if (len + mTextStart < left + 4)
ImGui::SetScrollX(std::max(0.0f, len + mTextStart - 4));
if (len + mTextStart > right - 4)
ImGui::SetScrollX(std::max(0.0f, len + mTextStart + 4 - width));
}
int TextEditor::GetPageSize() const
{
auto height = ImGui::GetWindowHeight() - 20.0f;
return (int)floor(height / mCharAdvance.y);
}
TextEditor::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)
: mAdded(aAdded)
, mAddedStart(aAddedStart)
, mAddedEnd(aAddedEnd)
, mRemoved(aRemoved)
, mRemovedStart(aRemovedStart)
, mRemovedEnd(aRemovedEnd)
, mBefore(aBefore)
, mAfter(aAfter)
{
assert(mAddedStart <= mAddedEnd);
assert(mRemovedStart <= mRemovedEnd);
}
void TextEditor::UndoRecord::Undo(TextEditor * aEditor)
{
if (!mAdded.empty())
{
aEditor->DeleteRange(mAddedStart, mAddedEnd);
aEditor->Colorize(mAddedStart.mLine - 1, mAddedEnd.mLine - mAddedStart.mLine + 2);
}
if (!mRemoved.empty())
{
auto start = mRemovedStart;
aEditor->InsertTextAt(start, mRemoved.c_str());
aEditor->Colorize(mRemovedStart.mLine - 1, mRemovedEnd.mLine - mRemovedStart.mLine + 2);
}
aEditor->mState = mBefore;
aEditor->EnsureCursorVisible();
}
void TextEditor::UndoRecord::Redo(TextEditor * aEditor)
{
if (!mRemoved.empty())
{
aEditor->DeleteRange(mRemovedStart, mRemovedEnd);
aEditor->Colorize(mRemovedStart.mLine - 1, mRemovedEnd.mLine - mRemovedStart.mLine + 1);
}
if (!mAdded.empty())
{
auto start = mAddedStart;
aEditor->InsertTextAt(start, mAdded.c_str());
aEditor->Colorize(mAddedStart.mLine - 1, mAddedEnd.mLine - mAddedStart.mLine + 1);
}
aEditor->mState = mAfter;
aEditor->EnsureCursorVisible();
}
static bool TokenizeCStyleString(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end)
{
const char * p = in_begin;
if (*p == '"')
{
p++;
while (p < in_end)
{
// handle end of string
if (*p == '"')
{
out_begin = in_begin;
out_end = p + 1;
return true;
}
// handle escape character for "
if (*p == '\\' && p + 1 < in_end && p[1] == '"')
p++;
p++;
}
}
return false;
}
static bool TokenizeCStyleCharacterLiteral(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end)
{
const char * p = in_begin;
if (*p == '\'')
{
p++;
// handle escape characters
if (p < in_end && *p == '\\')
p++;
if (p < in_end)
p++;
// handle end of character literal
if (p < in_end && *p == '\'')
{
out_begin = in_begin;
out_end = p + 1;
return true;
}
}
return false;
}
static bool TokenizeCStyleIdentifier(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end)
{
const char * p = in_begin;
if ((*p >= 'a' && *p <= 'z') || (*p >= 'A' && *p <= 'Z') || *p == '_')
{
p++;
while ((p < in_end) && ((*p >= 'a' && *p <= 'z') || (*p >= 'A' && *p <= 'Z') || (*p >= '0' && *p <= '9') || *p == '_'))
p++;
out_begin = in_begin;
out_end = p;
return true;
}
return false;
}
static bool TokenizeCStyleNumber(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end)
{
const char * p = in_begin;
const bool startsWithNumber = *p >= '0' && *p <= '9';
if (*p != '+' && *p != '-' && !startsWithNumber)
return false;
p++;
bool hasNumber = startsWithNumber;
while (p < in_end && (*p >= '0' && *p <= '9'))
{
hasNumber = true;
p++;
}
if (hasNumber == false)
return false;
bool isFloat = false;
bool isHex = false;
bool isBinary = false;
if (p < in_end)
{
if (*p == '.')
{
isFloat = true;
p++;
while (p < in_end && (*p >= '0' && *p <= '9'))
p++;
}
else if (*p == 'x' || *p == 'X')
{
// hex formatted integer of the type 0xef80
isHex = true;
p++;
while (p < in_end && ((*p >= '0' && *p <= '9') || (*p >= 'a' && *p <= 'f') || (*p >= 'A' && *p <= 'F')))
p++;
}
else if (*p == 'b' || *p == 'B')
{
// binary formatted integer of the type 0b01011101
isBinary = true;
p++;
while (p < in_end && (*p >= '0' && *p <= '1'))
p++;
}
}
if (isHex == false && isBinary == false)
{
// floating point exponent
if (p < in_end && (*p == 'e' || *p == 'E'))
{
isFloat = true;
p++;
if (p < in_end && (*p == '+' || *p == '-'))
p++;
bool hasDigits = false;
while (p < in_end && (*p >= '0' && *p <= '9'))
{
hasDigits = true;
p++;
}
if (hasDigits == false)
return false;
}
// single precision floating point type
if (p < in_end && *p == 'f')
p++;
}
if (isFloat == false)
{
// integer size type
while (p < in_end && (*p == 'u' || *p == 'U' || *p == 'l' || *p == 'L'))
p++;
}
out_begin = in_begin;
out_end = p;
return true;
}
static bool TokenizeCStylePunctuation(const char * in_begin, const char * in_end, const char *& out_begin, const char *& out_end)
{
(void)in_end;
switch (*in_begin)
{
case '[':
case ']':
case '{':
case '}':
case '!':
case '%':
case '^':
case '&':
case '*':
case '(':
case ')':
case '-':
case '+':
case '=':
case '~':
case '|':
case '<':
case '>':
case '?':
case ':':
case '/':
case ';':
case ',':
case '.':
out_begin = in_begin;
out_end = in_begin + 1;
return true;
}
return false;
}
const TextEditor::LanguageDefinition& TextEditor::LanguageDefinition::CPlusPlus()
{
static bool inited = false;
static LanguageDefinition langDef;
if (!inited)
{
static const char* const cppKeywords[] = {
"alignas", "alignof", "and", "and_eq", "asm", "atomic_cancel", "atomic_commit", "atomic_noexcept", "auto", "bitand", "bitor", "bool", "break", "case", "catch", "char", "char16_t", "char32_t", "class",
"compl", "concept", "const", "constexpr", "const_cast", "continue", "decltype", "default", "delete", "do", "double", "dynamic_cast", "else", "enum", "explicit", "export", "extern", "false", "float",
"for", "friend", "goto", "if", "import", "inline", "int", "long", "module", "mutable", "namespace", "new", "noexcept", "not", "not_eq", "nullptr", "operator", "or", "or_eq", "private", "protected", "public",
"register", "reinterpret_cast", "requires", "return", "short", "signed", "sizeof", "static", "static_assert", "static_cast", "struct", "switch", "synchronized", "template", "this", "thread_local",
"throw", "true", "try", "typedef", "typeid", "typename", "union", "unsigned", "using", "virtual", "void", "volatile", "wchar_t", "while", "xor", "xor_eq"
};
for (auto& k : cppKeywords)
langDef.mKeywords.insert(k);
static const char* const identifiers[] = {
"abort", "abs", "acos", "asin", "atan", "atexit", "atof", "atoi", "atol", &quo