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TextEditor.cpp
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TextEditor.cpp
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#include <algorithm>
#include <chrono>
#include <string>
#include <regex>
#include <cmath>
#include "TextEditor.h"
static const int cTextStart = 7;
// TODO
// - multiline comments vs single-line: latter is blocking start of a ML
// - handle non-monospace fonts
// - handle unicode/utf
// - testing
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(0.0f)
, mUndoIndex(0)
, mTabSize(4)
, mOverwrite(false)
, mReadOnly(false)
, mWithinRender(false)
, mScrollToCursor(false)
, mTextChanged(false)
, mColorRangeMin(0)
, mColorRangeMax(0)
, mSelectionMode(SelectionMode::Normal)
, mCheckMultilineComments(true)
{
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));
}
void TextEditor::SetPalette(const Palette & aValue)
{
mPalette = aValue;
}
int TextEditor::AppendBuffer(std::string& aBuffer, char chr, int aIndex)
{
if (chr != '\t')
{
aBuffer.push_back(chr);
return aIndex + 1;
}
else
{
auto num = mTabSize - aIndex % mTabSize;
for (int j = num; j > 0; --j)
aBuffer.push_back(' ');
return aIndex + num;
}
}
std::string TextEditor::GetText(const Coordinates & aStart, const Coordinates & aEnd) const
{
std::string result;
int prevLineNo = aStart.mLine;
for (auto it = aStart; it <= aEnd; Advance(it))
{
if (prevLineNo != it.mLine && it.mLine < (int) mLines.size())
result.push_back('\n');
if (it == aEnd)
break;
prevLineNo = it.mLine;
const auto& line = mLines[it.mLine];
if (!line.empty() && it.mColumn < (int)line.size())
result.push_back(line[it.mColumn].mChar);
}
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())
{
line = (int)mLines.size() - 1;
column = mLines.empty() ? 0 : (int)mLines[line].size();
}
else
{
column = mLines.empty() ? 0 : std::min((int)mLines[line].size(), aValue.mColumn);
}
return Coordinates(line, column);
}
void TextEditor::Advance(Coordinates & aCoordinates) const
{
if (aCoordinates.mLine < (int)mLines.size())
{
auto& line = mLines[aCoordinates.mLine];
if (aCoordinates.mColumn + 1 < (int)line.size())
++aCoordinates.mColumn;
else
{
++aCoordinates.mLine;
aCoordinates.mColumn = 0;
}
}
}
void TextEditor::DeleteRange(const Coordinates & aStart, const Coordinates & aEnd)
{
assert(aEnd >= aStart);
assert(!mReadOnly);
if (aEnd == aStart)
return;
if (aStart.mLine == aEnd.mLine)
{
auto& line = mLines[aStart.mLine];
if (aEnd.mColumn >= (int)line.size())
line.erase(line.begin() + aStart.mColumn, line.end());
else
line.erase(line.begin() + aStart.mColumn, line.begin() + aEnd.mColumn);
}
else
{
auto& firstLine = mLines[aStart.mLine];
auto& lastLine = mLines[aEnd.mLine];
firstLine.erase(firstLine.begin() + aStart.mColumn, firstLine.end());
lastLine.erase(lastLine.begin(), lastLine.begin() + aEnd.mColumn);
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 totalLines = 0;
auto chr = *aValue;
while (chr != '\0')
{
if (mLines.empty())
mLines.push_back(Line());
if (chr == '\r')
{
// skip
}
else if (chr == '\n')
{
if (aWhere.mColumn < (int)mLines[aWhere.mLine].size())
{
auto& newLine = InsertLine(aWhere.mLine + 1);
auto& line = mLines[aWhere.mLine];
newLine.insert(newLine.begin(), line.begin() + aWhere.mColumn, line.end());
line.erase(line.begin() + aWhere.mColumn, line.end());
}
else
{
InsertLine(aWhere.mLine + 1);
}
++aWhere.mLine;
aWhere.mColumn = 0;
++totalLines;
}
else
{
auto& line = mLines[aWhere.mLine];
line.insert(line.begin() + aWhere.mColumn, Glyph(chr, PaletteIndex::Default));
++aWhere.mColumn;
}
chr = *(++aValue);
mTextChanged = true;
}
return totalLines;
}
void TextEditor::AddUndo(UndoRecord& aValue)
{
assert(!mReadOnly);
mUndoBuffer.resize(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 = std::max(0, (int)floor(local.x / mCharAdvance.x) - cTextStart);
int column = 0;
if (lineNo >= 0 && lineNo < (int)mLines.size())
{
auto& line = mLines[lineNo];
auto distance = 0;
while (distance < columnCoord && column < (int)line.size())
{
if (line[column].mChar == '\t')
distance = (distance / mTabSize) * mTabSize + mTabSize;
else
++distance;
++column;
}
}
return Coordinates(lineNo, column);
}
TextEditor::Coordinates TextEditor::FindWordStart(const Coordinates & aFrom) const
{
Coordinates at = aFrom;
if (at.mLine >= (int)mLines.size())
return at;
auto& line = mLines[at.mLine];
if (at.mColumn >= (int)line.size())
return at;
auto cstart = (PaletteIndex)line[at.mColumn].mColorIndex;
while (at.mColumn > 0)
{
if (cstart != (PaletteIndex)line[at.mColumn - 1].mColorIndex)
break;
--at.mColumn;
}
return at;
}
TextEditor::Coordinates TextEditor::FindWordEnd(const Coordinates & aFrom) const
{
Coordinates at = aFrom;
if (at.mLine >= (int)mLines.size())
return at;
auto& line = mLines[at.mLine];
if (at.mColumn >= (int)line.size())
return at;
auto cstart = (PaletteIndex)line[at.mColumn].mColorIndex;
while (at.mColumn < (int)line.size())
{
if (cstart != (PaletteIndex)line[at.mColumn].mColorIndex)
break;
++at.mColumn;
}
return at;
}
bool TextEditor::IsOnWordBoundary(const Coordinates & aAt) const
{
if (aAt.mLine >= (int)mLines.size() || aAt.mColumn == 0)
return true;
auto& line = mLines[aAt.mLine];
if (aAt.mColumn >= (int)line.size())
return true;
return line[aAt.mColumn].mColorIndex != line[aAt.mColumn - 1].mColorIndex;
}
void TextEditor::RemoveLine(int aStart, int aEnd)
{
assert(!mReadOnly);
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);
mTextChanged = true;
}
void TextEditor::RemoveLine(int aIndex)
{
assert(!mReadOnly);
ErrorMarkers etmp;
for (auto& i : mErrorMarkers)
{
ErrorMarkers::value_type e(i.first >= aIndex ? i.first - 1 : i.first, i.second);
if (e.first == 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);
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;
for (auto it = start; it < end; Advance(it))
r.push_back(mLines[it.mLine][it.mColumn].mChar);
return r;
}
void TextEditor::Render(const char* aTitle, const ImVec2& aSize, bool aBorder)
{
mWithinRender = true;
mTextChanged = false;
ImGuiIO& io = ImGui::GetIO();
auto xadv = (io.Fonts->Fonts[0]->IndexAdvanceX['X']);
mCharAdvance = ImVec2(io.FontGlobalScale * xadv, io.FontGlobalScale * io.Fonts->Fonts[0]->FontSize + mLineSpacing);
ImGui::PushStyleColor(ImGuiCol_ChildWindowBg, ImGui::ColorConvertU32ToFloat4(mPalette[(int)PaletteIndex::Background]));
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0.0f, 0.0f));
ImGui::BeginChild(aTitle, aSize, aBorder, ImGuiWindowFlags_HorizontalScrollbar | ImGuiWindowFlags_NoMove);
ImGui::PushAllowKeyboardFocus(true);
auto shift = io.KeyShift;
auto ctrl = io.KeyCtrl;
auto alt = io.KeyAlt;
if (ImGui::IsWindowFocused())
{
if (ImGui::IsWindowHovered())
ImGui::SetMouseCursor(ImGuiMouseCursor_TextInput);
//ImGui::CaptureKeyboardFromApp(true);
io.WantCaptureKeyboard = true;
io.WantTextInput = true;
if (!IsReadOnly() && ImGui::IsKeyPressed('Z'))
if (ctrl && !shift && !alt)
Undo();
if (!IsReadOnly() && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Backspace)))
if (!ctrl && !shift && alt)
Undo();
if (!IsReadOnly() && ctrl && !shift && !alt && ImGui::IsKeyPressed('Y'))
Redo();
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(45))
mOverwrite ^= true;
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed(45))
Copy();
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed('C'))
Copy();
else if (!IsReadOnly() && !ctrl && shift && !alt && ImGui::IsKeyPressed(45))
Paste();
else if (!IsReadOnly() && ctrl && !shift && !alt && ImGui::IsKeyPressed('V'))
Paste();
else if (ctrl && !shift && !alt && ImGui::IsKeyPressed('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();
if (!IsReadOnly())
{
for (size_t i = 0; i < sizeof(io.InputCharacters) / sizeof(io.InputCharacters[0]); i++)
{
auto c = (unsigned char)io.InputCharacters[i];
if (c != 0)
{
if (isprint(c) || isspace(c))
{
if (c == '\r')
c = '\n';
EnterCharacter((char)c);
}
}
}
}
}
if (ImGui::IsWindowHovered())
{
static float lastClick = -1.0f;
if (!shift && !alt)
{
auto click = ImGui::IsMouseClicked(0);
auto doubleClick = ImGui::IsMouseDoubleClicked(0);
auto t = ImGui::GetTime();
auto tripleClick = click && !doubleClick && t - lastClick < io.MouseDoubleClickTime;
if (tripleClick)
{
printf("triple\n");
if (!ctrl)
{
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = SanitizeCoordinates(ScreenPosToCoordinates(ImGui::GetMousePos()));
mSelectionMode = SelectionMode::Line;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
lastClick = -1.0f;
}
else if (doubleClick)
{
printf("double\n");
if (!ctrl)
{
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = SanitizeCoordinates(ScreenPosToCoordinates(ImGui::GetMousePos()));
if (mSelectionMode == SelectionMode::Line)
mSelectionMode = SelectionMode::Normal;
else
mSelectionMode = SelectionMode::Word;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
lastClick = ImGui::GetTime();
}
else if (click)
{
printf("single\n");
mState.mCursorPosition = mInteractiveStart = mInteractiveEnd = SanitizeCoordinates(ScreenPosToCoordinates(ImGui::GetMousePos()));
if (ctrl)
mSelectionMode = SelectionMode::Word;
else
mSelectionMode = SelectionMode::Normal;
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
lastClick = ImGui::GetTime();
}
else if (ImGui::IsMouseDragging(0) && ImGui::IsMouseDown(0))
{
io.WantCaptureMouse = true;
mState.mCursorPosition = mInteractiveEnd = SanitizeCoordinates(ScreenPosToCoordinates(ImGui::GetMousePos()));
SetSelection(mInteractiveStart, mInteractiveEnd, mSelectionMode);
}
else
{
}
}
//if (!ImGui::IsMouseDown(0))
// mWordSelectionMode = false;
}
ColorizeInternal();
static std::string buffer;
auto contentSize = ImGui::GetWindowContentRegionMax();
auto drawList = ImGui::GetWindowDrawList();
int appendIndex = 0;
int longest = cTextStart;
ImVec2 cursorScreenPos = ImGui::GetCursorScreenPos();
auto scrollX = ImGui::GetScrollX();
auto scrollY = ImGui::GetScrollY();
auto lineNo = (int)floor(scrollY / mCharAdvance.y);
auto lineMax = std::max(0, std::min((int)mLines.size() - 1, lineNo + (int)floor((scrollY + contentSize.y) / mCharAdvance.y)));
if (!mLines.empty())
{
while (lineNo <= lineMax)
{
ImVec2 lineStartScreenPos = ImVec2(cursorScreenPos.x, cursorScreenPos.y + lineNo * mCharAdvance.y);
ImVec2 textScreenPos = ImVec2(lineStartScreenPos.x + mCharAdvance.x * cTextStart, lineStartScreenPos.y);
auto& line = mLines[lineNo];
longest = std::max(cTextStart + TextDistanceToLineStart(Coordinates(lineNo, (int) line.size())), longest);
auto columnNo = 0;
Coordinates lineStartCoord(lineNo, 0);
Coordinates lineEndCoord(lineNo, (int)line.size());
int sstart = -1;
int ssend = -1;
assert(mState.mSelectionStart <= mState.mSelectionEnd);
if (mState.mSelectionStart <= lineEndCoord)
sstart = mState.mSelectionStart > lineStartCoord ? TextDistanceToLineStart(mState.mSelectionStart) : 0;
if (mState.mSelectionEnd > lineStartCoord)
ssend = TextDistanceToLineStart(mState.mSelectionEnd < lineEndCoord ? mState.mSelectionEnd : lineEndCoord);
if (mState.mSelectionEnd.mLine > lineNo)
++ssend;
if (sstart != -1 && ssend != -1 && sstart < ssend)
{
ImVec2 vstart(lineStartScreenPos.x + (mCharAdvance.x) * (sstart + cTextStart), lineStartScreenPos.y);
ImVec2 vend(lineStartScreenPos.x + (mCharAdvance.x) * (ssend + cTextStart), lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(vstart, vend, mPalette[(int)PaletteIndex::Selection]);
}
static char buf[16];
auto start = ImVec2(lineStartScreenPos.x + scrollX, lineStartScreenPos.y);
if (mBreakpoints.find(lineNo + 1) != mBreakpoints.end())
{
auto end = ImVec2(lineStartScreenPos.x + contentSize.x + 2.0f * scrollX, lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(start, end, mPalette[(int)PaletteIndex::Breakpoint]);
}
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();
}
}
auto chars = snprintf(buf, 16, "%6d", lineNo + 1);
assert(chars >= 0 && chars < 16);
drawList->AddText(ImVec2(lineStartScreenPos.x /*+ mCharAdvance.x * 1*/, lineStartScreenPos.y), mPalette[(int)PaletteIndex::LineNumber], buf);
if (mState.mCursorPosition.mLine == lineNo)
{
auto focused = ImGui::IsWindowFocused();
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);
}
int cx = TextDistanceToLineStart(mState.mCursorPosition);
if (focused)
{
static auto timeStart = std::chrono::system_clock::now();
auto timeEnd = std::chrono::system_clock::now();
auto diff = timeEnd - timeStart;
auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(diff).count();
if (elapsed > 400)
{
ImVec2 cstart(lineStartScreenPos.x + mCharAdvance.x * (cx + cTextStart), lineStartScreenPos.y);
ImVec2 cend(lineStartScreenPos.x + mCharAdvance.x * (cx + cTextStart) + (mOverwrite ? mCharAdvance.x : 1.0f), lineStartScreenPos.y + mCharAdvance.y);
drawList->AddRectFilled(cstart, cend, mPalette[(int)PaletteIndex::Cursor]);
if (elapsed > 800)
timeStart = timeEnd;
}
}
}
appendIndex = 0;
auto prevColor = line.empty() ? PaletteIndex::Default : (line[0].mMultiLineComment ? PaletteIndex::MultiLineComment : line[0].mColorIndex);
for (auto& glyph : line)
{
auto color = glyph.mMultiLineComment ? PaletteIndex::MultiLineComment : glyph.mColorIndex;
if (color != prevColor && !buffer.empty())
{
drawList->AddText(textScreenPos, mPalette[(uint8_t)prevColor], buffer.c_str());
textScreenPos.x += mCharAdvance.x * buffer.length();
buffer.clear();
prevColor = color;
}
appendIndex = AppendBuffer(buffer, glyph.mChar, appendIndex);
++columnNo;
}
if (!buffer.empty())
{
drawList->AddText(textScreenPos, mPalette[(uint8_t)prevColor], buffer.c_str());
buffer.clear();
}
appendIndex = 0;
lineStartScreenPos.y += mCharAdvance.y;
textScreenPos.x = lineStartScreenPos.x + mCharAdvance.x * cTextStart;
textScreenPos.y = lineStartScreenPos.y;
++lineNo;
}
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) * mCharAdvance.x, mLines.size() * mCharAdvance.y));
if (mScrollToCursor)
{
EnsureCursorVisible();
ImGui::SetWindowFocus();
mScrollToCursor = false;
}
ImGui::PopAllowKeyboardFocus();
ImGui::EndChild();
ImGui::PopStyleVar();
ImGui::PopStyleColor();
mWithinRender = false;
}
void TextEditor::SetText(const std::string & aText)
{
mLines.clear();
for (auto chr : aText)
{
if (mLines.empty())
mLines.push_back(Line());
if (chr == '\n')
mLines.push_back(Line());
else
{
mLines.back().push_back(Glyph(chr, PaletteIndex::Default));
}
mTextChanged = true;
}
mUndoBuffer.clear();
Colorize();
}
void TextEditor::EnterCharacter(Char aChar)
{
assert(!mReadOnly);
UndoRecord u;
u.mBefore = mState;
if (HasSelection())
{
u.mRemoved = GetSelectedText();
u.mRemovedStart = mState.mSelectionStart;
u.mRemovedEnd = mState.mSelectionEnd;
DeleteSelection();
}
auto coord = GetActualCursorCoordinates();
u.mAddedStart = coord;
if (mLines.empty())
mLines.push_back(Line());
if (aChar == '\n')
{
InsertLine(coord.mLine + 1);
auto& line = mLines[coord.mLine];
auto& newLine = mLines[coord.mLine + 1];
newLine.insert(newLine.begin(), line.begin() + coord.mColumn, line.end());
line.erase(line.begin() + coord.mColumn, line.begin() + line.size());
mState.mCursorPosition = Coordinates(coord.mLine + 1, 0);
}
else
{
auto& line = mLines[coord.mLine];
if (mOverwrite && (int)line.size() > coord.mColumn)
line[coord.mColumn] = Glyph(aChar, PaletteIndex::Default);
else
line.insert(line.begin() + coord.mColumn, Glyph(aChar, PaletteIndex::Default));
mState.mCursorPosition = coord;
++mState.mCursorPosition.mColumn;
}
mTextChanged = true;
u.mAdded = aChar;
u.mAddedEnd = GetActualCursorCoordinates();
u.mAfter = mState;
AddUndo(u);
Colorize(coord.mLine - 1, 3);
EnsureCursorVisible();
}
void TextEditor::SetReadOnly(bool aValue)
{
mReadOnly = aValue;
}
void TextEditor::SetCursorPosition(const Coordinates & aPosition)
{
if (mState.mCursorPosition != aPosition)
{
mState.mCursorPosition = aPosition;
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)
{
mState.mSelectionStart = SanitizeCoordinates(aStart);
mState.mSelectionEnd = SanitizeCoordinates(aEnd);
if (aStart > aEnd)
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 = lineNo < mLines.size() ? mLines[lineNo].size() : 0;
mState.mSelectionStart = Coordinates(mState.mSelectionStart.mLine, 0);
mState.mSelectionEnd = Coordinates(lineNo, (int) lineSize);
break;
}
default:
break;
}
}
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();
}
}
void TextEditor::MoveLeft(int aAmount, bool aSelect, bool aWordMode)
{
if (mLines.empty())
return;
auto oldPos = mState.mCursorPosition;
mState.mCursorPosition = GetActualCursorCoordinates();
while (aAmount-- > 0)
{
if (mState.mCursorPosition.mColumn == 0)
{
if (mState.mCursorPosition.mLine > 0)
{
--mState.mCursorPosition.mLine;
mState.mCursorPosition.mColumn = (int)mLines[mState.mCursorPosition.mLine].size();
}
}
else
{
mState.mCursorPosition.mColumn = std::max(0, mState.mCursorPosition.mColumn - 1);
if (aWordMode)
mState.mCursorPosition = FindWordStart(mState.mCursorPosition);
}
}
assert(mState.mCursorPosition.mColumn >= 0);
if (aSelect)
{
if (oldPos == mInteractiveStart)
mInteractiveStart = mState.mCursorPosition;
else if (oldPos == mInteractiveEnd)