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// Scintilla source code edit control
/** @file EditModel.cxx
** Defines the editor state that must be visible to EditorView.
**/
// Copyright 1998-2014 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <cstddef>
#include <cstdlib>
#include <cstdint>
#include <cassert>
#include <cstring>
#include <cmath>
#include <stdexcept>
#include <string>
#include <string_view>
#include <vector>
#include <map>
#include <set>
#include <optional>
#include <algorithm>
#include <memory>
#include "ScintillaTypes.h"
#include "ILoader.h"
#include "ILexer.h"
#include "Debugging.h"
#include "Geometry.h"
#include "Platform.h"
#include "CharacterCategoryMap.h"
#include "Position.h"
#include "UniqueString.h"
#include "SplitVector.h"
#include "Partitioning.h"
#include "RunStyles.h"
#include "ContractionState.h"
#include "CellBuffer.h"
#include "Indicator.h"
#include "LineMarker.h"
#include "Style.h"
#include "ViewStyle.h"
#include "CharClassify.h"
#include "Decoration.h"
#include "CaseFolder.h"
#include "Document.h"
#include "UniConversion.h"
#include "Selection.h"
#include "PositionCache.h"
#include "EditModel.h"
using namespace Scintilla;
using namespace Scintilla::Internal;
Caret::Caret() noexcept :
active(false), on(false), period(500) {}
void ModelState::RememberSelectionForUndo(int index, const Selection &sel) {
historyForUndo.indexCurrent = index;
historyForUndo.ssCurrent = sel.ToString();
}
void ModelState::ForgetSelectionForUndo() noexcept {
historyForUndo.indexCurrent = -1;
}
void ModelState::RememberSelectionOntoStack(int index, Sci::Line topLine) {
if ((historyForUndo.indexCurrent >= 0) && (index == historyForUndo.indexCurrent + 1)) {
// Don't overwrite initial selection save if most recent action was coalesced
historyForUndo.stack[index] = { historyForUndo.ssCurrent, topLine };
}
}
void ModelState::RememberSelectionForRedoOntoStack(int index, const Selection &sel, Sci::Line topLine) {
historyForRedo.stack[index] = { sel.ToString(), topLine };
}
SelectionWithScroll ModelState::SelectionFromStack(int index, UndoRedo history) const {
const SelectionHistory &sh = history == UndoRedo::undo ? historyForUndo : historyForRedo;
const SelectionStack::const_iterator it = sh.stack.find(index);
if (it != sh.stack.end()) {
return it->second;
}
return {};
}
void ModelState::TruncateUndo(int index) {
const SelectionStack::const_iterator itUndo = historyForUndo.stack.find(index);
historyForUndo.stack.erase(itUndo, historyForUndo.stack.end());
const SelectionStack::const_iterator itRedo = historyForRedo.stack.find(index);
historyForRedo.stack.erase(itRedo, historyForRedo.stack.end());
}
EditModel::EditModel() : braces{} {
inOverstrike = false;
xOffset = 0;
trackLineWidth = false;
posDrag = SelectionPosition(Sci::invalidPosition);
braces[0] = Sci::invalidPosition;
braces[1] = Sci::invalidPosition;
bracesMatchStyle = StyleBraceBad;
highlightGuideColumn = 0;
hasFocus = false;
primarySelection = true;
imeInteraction = IMEInteraction::Windowed;
bidirectional = Bidirectional::Disabled;
foldFlags = FoldFlag::None;
foldDisplayTextStyle = FoldDisplayTextStyle::Hidden;
hotspot = Range(Sci::invalidPosition);
hotspotSingleLine = true;
hoverIndicatorPos = Sci::invalidPosition;
wrapWidth = LineLayout::wrapWidthInfinite;
reprs = std::make_unique<SpecialRepresentations>();
pdoc = new Document(DocumentOption::Default);
pdoc->AddRef();
pcs = ContractionStateCreate(pdoc->IsLarge());
}
EditModel::~EditModel() {
try {
// Erasing the view state won't throw even though SetViewState
// and the resulting map::erase aren't marked noexcept.
pdoc->SetViewState(this, {});
// This never throws but isn't marked noexcept for compatibility
pdoc->Release();
} catch (...) {
// Ignore any exception
}
pdoc = nullptr;
}
bool EditModel::BidirectionalEnabled() const noexcept {
return (bidirectional != Bidirectional::Disabled) &&
(CpUtf8 == pdoc->dbcsCodePage);
}
bool EditModel::BidirectionalR2L() const noexcept {
return bidirectional == Bidirectional::R2L;
}
SurfaceMode EditModel::CurrentSurfaceMode() const noexcept {
return SurfaceMode(pdoc->dbcsCodePage, BidirectionalR2L());
}
void EditModel::SetDefaultFoldDisplayText(const char *text) {
defaultFoldDisplayText = IsNullOrEmpty(text) ? UniqueString() : UniqueStringCopy(text);
}
const char *EditModel::GetDefaultFoldDisplayText() const noexcept {
return defaultFoldDisplayText.get();
}
const char *EditModel::GetFoldDisplayText(Sci::Line lineDoc) const noexcept {
if (foldDisplayTextStyle == FoldDisplayTextStyle::Hidden || pcs->GetExpanded(lineDoc)) {
return nullptr;
}
const char *text = pcs->GetFoldDisplayText(lineDoc);
return text ? text : defaultFoldDisplayText.get();
}
InSelection EditModel::LineEndInSelection(Sci::Line lineDoc) const {
const Sci::Position posAfterLineEnd = pdoc->LineStart(lineDoc + 1);
return sel.InSelectionForEOL(posAfterLineEnd);
}
int EditModel::GetMark(Sci::Line line) const {
return pdoc->GetMark(line, FlagSet(changeHistoryOption, ChangeHistoryOption::Markers));
}
void EditModel::EnsureModelState() {
if (!modelState && (undoSelectionHistoryOption != UndoSelectionHistoryOption::Disabled)) {
if (ViewStateShared vss = pdoc->GetViewState(this)) {
modelState = std::dynamic_pointer_cast<ModelState>(vss);
} else {
modelState = std::make_shared<ModelState>();
pdoc->SetViewState(this, std::static_pointer_cast<ViewState>(modelState));
}
}
}
void EditModel::ChangeUndoSelectionHistory(Scintilla::UndoSelectionHistoryOption undoSelectionHistoryOptionNew) {
undoSelectionHistoryOption = undoSelectionHistoryOptionNew;
if (undoSelectionHistoryOption == UndoSelectionHistoryOption::Disabled) {
modelState.reset();
pdoc->SetViewState(this, {});
}
}
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