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-rw-r--r--src/CellBuffer.cxx950
1 files changed, 950 insertions, 0 deletions
diff --git a/src/CellBuffer.cxx b/src/CellBuffer.cxx
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index 000000000..777688511
--- /dev/null
+++ b/src/CellBuffer.cxx
@@ -0,0 +1,950 @@
+// Scintilla source code edit control
+// CellBuffer.cxx - manages a buffer of cells
+// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "Platform.h"
+
+#include "Scintilla.h"
+#include "SVector.h"
+#include "CellBuffer.h"
+
+MarkerHandleSet::MarkerHandleSet() {
+ root = 0;
+}
+
+MarkerHandleSet::~MarkerHandleSet() {
+ MarkerHandleNumber *mhn = root;
+ while (mhn) {
+ MarkerHandleNumber *mhnToFree = mhn;
+ mhn = mhn->next;
+ delete mhnToFree;
+ }
+ root = 0;
+}
+
+int MarkerHandleSet::Length() {
+ int c = 0;
+ MarkerHandleNumber *mhn = root;
+ while (mhn) {
+ c++;
+ mhn = mhn->next;
+ }
+ return c;
+}
+
+int MarkerHandleSet::NumberFromHandle(int handle) {
+ MarkerHandleNumber *mhn = root;
+ while (mhn) {
+ if (mhn->handle == handle) {
+ return mhn->number;
+ }
+ mhn = mhn->next;
+ }
+ return - 1;
+}
+
+int MarkerHandleSet::MarkValue() {
+ unsigned int m = 0;
+ MarkerHandleNumber *mhn = root;
+ while (mhn) {
+ m |= (1 << mhn->number);
+ mhn = mhn->next;
+ }
+ return m;
+}
+
+bool MarkerHandleSet::Contains(int handle) {
+ MarkerHandleNumber *mhn = root;
+ while (mhn) {
+ if (mhn->handle == handle) {
+ return true;
+ }
+ mhn = mhn->next;
+ }
+ return false;
+}
+
+bool MarkerHandleSet::InsertHandle(int handle, int markerNum) {
+ MarkerHandleNumber *mhn = new MarkerHandleNumber;
+ if (!mhn)
+ return false;
+ mhn->handle = handle;
+ mhn->number = markerNum;
+ mhn->next = root;
+ root = mhn;
+ return true;
+}
+
+void MarkerHandleSet::RemoveHandle(int handle) {
+ MarkerHandleNumber **pmhn = &root;
+ while (*pmhn) {
+ MarkerHandleNumber *mhn = *pmhn;
+ if (mhn->handle == handle) {
+ *pmhn = mhn->next;
+ delete mhn;
+ return;
+ }
+ pmhn = &((*pmhn)->next);
+ }
+}
+
+void MarkerHandleSet::RemoveNumber(int markerNum) {
+ MarkerHandleNumber **pmhn = &root;
+ while (*pmhn) {
+ MarkerHandleNumber *mhn = *pmhn;
+ if (mhn->number == markerNum) {
+ *pmhn = mhn->next;
+ delete mhn;
+ return;
+ }
+ pmhn = &((*pmhn)->next);
+ }
+}
+
+void MarkerHandleSet::CombineWith(MarkerHandleSet *other) {
+ MarkerHandleNumber **pmhn = &root;
+ while (*pmhn) {
+ pmhn = &((*pmhn)->next);
+ }
+ *pmhn = other->root;
+ other->root = 0;
+}
+
+LineVector::LineVector() {
+ linesData = 0;
+ lines = 0;
+ levels = 0;
+ Init();
+}
+
+LineVector::~LineVector() {
+ for (int line = 0; line < lines; line++) {
+ delete linesData[line].handleSet;
+ linesData[line].handleSet = 0;
+ }
+ delete []linesData;
+ linesData = 0;
+ delete []levels;
+ levels = 0;
+}
+
+void LineVector::Init() {
+ for (int line = 0; line < lines; line++) {
+ delete linesData[line].handleSet;
+ linesData[line].handleSet = 0;
+ }
+ delete []linesData;
+ linesData = new LineData[static_cast<int>(growSize)];
+ size = growSize;
+ lines = 1;
+ delete []levels;
+ levels = 0;
+ sizeLevels = 0;
+}
+
+void LineVector::Expand(int sizeNew) {
+ LineData *linesDataNew = new LineData[sizeNew];
+ if (linesDataNew) {
+ for (int i = 0; i < size; i++)
+ linesDataNew[i] = linesData[i];
+ // Do not delete handleSets here as they are transferred to new linesData
+ delete []linesData;
+ linesData = linesDataNew;
+ size = sizeNew;
+ } else {
+ Platform::DebugPrintf("No memory available\n");
+ // TODO: Blow up
+ }
+}
+
+void LineVector::ExpandLevels(int sizeNew) {
+ if (sizeNew == -1)
+ sizeNew = size;
+ int *levelsNew = new int[sizeNew];
+ if (levelsNew) {
+ int i = 0;
+ for (; i < sizeLevels; i++)
+ levelsNew[i] = levels[i];
+ for (; i < sizeNew; i++)
+ levelsNew[i] = SC_FOLDLEVELBASE;
+ delete []levels;
+ levels = levelsNew;
+ sizeLevels = sizeNew;
+ } else {
+ Platform::DebugPrintf("No memory available\n");
+ // TODO: Blow up
+ }
+}
+
+void LineVector::InsertValue(int pos, int value) {
+ //Platform::DebugPrintf("InsertValue[%d] = %d\n", pos, value);
+ if ((lines + 2) >= size) {
+ Expand(size + growSize);
+ if (levels) {
+ ExpandLevels(size + growSize);
+ }
+ }
+ lines++;
+ for (int i = lines + 1; i > pos; i--) {
+ linesData[i] = linesData[i - 1];
+ }
+ linesData[pos].startPosition = value;
+ linesData[pos].handleSet = 0;
+}
+
+void LineVector::SetValue(int pos, int value) {
+ //Platform::DebugPrintf("SetValue[%d] = %d\n", pos, value);
+ if ((pos + 2) >= size) {
+ //Platform::DebugPrintf("Resize %d %d\n", size,pos);
+ Expand(pos + growSize);
+ //Platform::DebugPrintf("end Resize %d %d\n", size,pos);
+ lines = pos;
+ if (levels) {
+ ExpandLevels(pos + growSize);
+ }
+ }
+ linesData[pos].startPosition = value;
+}
+
+void LineVector::Remove(int pos) {
+ //Platform::DebugPrintf("Remove %d\n", pos);
+ // Retain the markers from the deleted line by oring them into the previous line
+ if (pos > 0) {
+ MergeMarkers(pos - 1);
+ }
+ for (int i = pos; i < lines; i++) {
+ linesData[i] = linesData[i + 1];
+ }
+ lines--;
+}
+
+int LineVector::LineFromPosition(int pos) {
+ //Platform::DebugPrintf("LineFromPostion %d lines=%d end = %d\n", pos, lines, linesData[lines].startPosition);
+ if (lines == 0)
+ return 0;
+ //Platform::DebugPrintf("LineFromPosition %d\n", pos);
+ if (pos >= linesData[lines].startPosition)
+ return lines - 1;
+ int lower = 0;
+ int upper = lines;
+ int middle = 0;
+ do {
+ middle = (upper + lower + 1) / 2; // Round high
+ if (pos < linesData[middle].startPosition) {
+ upper = middle - 1;
+ } else {
+ lower = middle;
+ }
+ } while (lower < upper);
+ //Platform::DebugPrintf("LineFromPostion %d %d %d\n", pos, lower, linesData[lower].startPosition, linesData[lower > 1 ? lower - 1 : 0].startPosition);
+ return lower;
+}
+
+int LineVector::AddMark(int line, int markerNum) {
+ handleCurrent++;
+ if (!linesData[line].handleSet) {
+ // Need new structure to hold marker handle
+ linesData[line].handleSet = new MarkerHandleSet;
+ if (!linesData[line].handleSet)
+ return - 1;
+ }
+ linesData[line].handleSet->InsertHandle(handleCurrent, markerNum);
+
+ return handleCurrent;
+}
+
+void LineVector::MergeMarkers(int pos) {
+ if (linesData[pos].handleSet || linesData[pos + 1].handleSet) {
+ if (linesData[pos].handleSet && linesData[pos + 1].handleSet) {
+ linesData[pos].handleSet->CombineWith(linesData[pos].handleSet);
+ linesData[pos].handleSet = 0;
+ }
+ }
+}
+
+void LineVector::DeleteMark(int line, int markerNum) {
+ if (linesData[line].handleSet) {
+ if (markerNum == -1) {
+ delete linesData[line].handleSet;
+ linesData[line].handleSet = 0;
+ } else {
+ linesData[line].handleSet->RemoveNumber(markerNum);
+ if (linesData[line].handleSet->Length() == 0) {
+ delete linesData[line].handleSet;
+ linesData[line].handleSet = 0;
+ }
+ }
+ }
+}
+
+void LineVector::DeleteMarkFromHandle(int markerHandle) {
+ int line = LineFromHandle(markerHandle);
+ if (line >= 0) {
+ linesData[line].handleSet->RemoveHandle(markerHandle);
+ if (linesData[line].handleSet->Length() == 0) {
+ delete linesData[line].handleSet;
+ linesData[line].handleSet = 0;
+ }
+ }
+}
+
+int LineVector::LineFromHandle(int markerHandle) {
+ for (int line = 0; line < lines; line++) {
+ if (linesData[line].handleSet) {
+ if (linesData[line].handleSet->Contains(markerHandle)) {
+ return line;
+ }
+ }
+ }
+ return - 1;
+}
+
+Action::Action() {
+ at = startAction;
+ position = 0;
+ data = 0;
+ lenData = 0;
+}
+
+Action::~Action() {
+ Destroy();
+}
+
+void Action::Create(actionType at_, int position_, char *data_, int lenData_) {
+ delete []data;
+ position = position_;
+ at = at_;
+ data = data_;
+ lenData = lenData_;
+}
+
+void Action::Destroy() {
+ delete []data;
+ data = 0;
+}
+
+void Action::Grab(Action *source) {
+ delete []data;
+
+ position = source->position;
+ at = source->at;
+ data = source->data;
+ lenData = source->lenData;
+
+ // Ownership of source data transferred to this
+ source->position = 0;
+ source->at = startAction;
+ source->data = 0;
+ source->lenData = 0;
+}
+
+CellBuffer::CellBuffer(int initialLength) {
+ body = new char[initialLength];
+ size = initialLength;
+ length = 0;
+ part1len = 0;
+ gaplen = initialLength;
+ part2body = body + gaplen;
+ readOnly = false;
+
+ lenActions = 100;
+ actions = new Action[lenActions];
+ maxAction = 0;
+ currentAction = 0;
+ collectingUndo = undoCollectAutoStart;
+ undoSequenceDepth = 0;
+ savePoint = 0;
+
+ actions[currentAction].Create(startAction);
+}
+
+CellBuffer::~CellBuffer() {
+ delete []body;
+ body = 0;
+ delete []actions;
+ actions = 0;
+}
+
+void CellBuffer::GapTo(int position) {
+ if (position == part1len)
+ return;
+ if (position < part1len) {
+ int diff = part1len - position;
+ //Platform::DebugPrintf("Move gap backwards to %d diff = %d part1len=%d length=%d \n", position,diff, part1len, length);
+ for (int i = 0; i < diff; i++)
+ body[part1len + gaplen - i - 1] = body[part1len - i - 1];
+ } else { // position > part1len
+ int diff = position - part1len;
+ //Platform::DebugPrintf("Move gap forwards to %d diff =%d\n", position,diff);
+ for (int i = 0; i < diff; i++)
+ body[part1len + i] = body[part1len + gaplen + i];
+ }
+ part1len = position;
+ part2body = body + gaplen;
+}
+
+void CellBuffer::RoomFor(int insertionLength) {
+ //Platform::DebugPrintf("need room %d %d\n", gaplen, insertionLength);
+ if (gaplen <= insertionLength) {
+ //Platform::DebugPrintf("need room %d %d\n", gaplen, insertionLength);
+ GapTo(length);
+ int newSize = size + insertionLength + 4000;
+ //Platform::DebugPrintf("moved gap %d\n", newSize);
+ char *newBody = new char[newSize];
+ memcpy(newBody, body, size);
+ delete []body;
+ body = newBody;
+ gaplen += newSize - size;
+ part2body = body + gaplen;
+ size = newSize;
+ //Platform::DebugPrintf("end need room %d %d - size=%d length=%d\n", gaplen, insertionLength,size,length);
+ }
+}
+
+// To make it easier to write code that uses ByteAt, a position outside the range of the buffer
+// can be retrieved. All characters outside the range have the value '\0'.
+char CellBuffer::ByteAt(int position) {
+ if (position < part1len) {
+ if (position < 0) {
+ return '\0';
+ } else {
+ return body[position];
+ }
+ } else {
+ if (position >= length) {
+ return '\0';
+ } else {
+ return part2body[position];
+ }
+ }
+}
+
+void CellBuffer::SetByteAt(int position, char ch) {
+
+ if (position < 0) {
+ //Platform::DebugPrintf("Bad position %d\n",position);
+ return;
+ }
+ if (position >= length + 11) {
+ Platform::DebugPrintf("Very Bad position %d of %d\n", position, length);
+ //exit(2);
+ return;
+ }
+ if (position >= length) {
+ //Platform::DebugPrintf("Bad position %d of %d\n",position,length);
+ return;
+ }
+
+ if (position < part1len) {
+ body[position] = ch;
+ } else {
+ part2body[position] = ch;
+ }
+}
+
+char CellBuffer::CharAt(int position) {
+ return ByteAt(position*2);
+}
+
+void CellBuffer::GetCharRange(char *buffer, int position, int lengthRetrieve) {
+ if (lengthRetrieve < 0)
+ return;
+ if (position < 0)
+ return;
+ int bytePos = position * 2;
+ if ((bytePos + lengthRetrieve * 2) > length) {
+ Platform::DebugPrintf("Bad GetCharRange %d for %d of %d\n",bytePos,
+ lengthRetrieve, length);
+ return;
+ }
+ GapTo(0); // Move the buffer so its easy to subscript into it
+ char *pb = part2body + bytePos;
+ while (lengthRetrieve--) {
+ *buffer++ = *pb;
+ pb +=2;
+ }
+}
+
+char CellBuffer::StyleAt(int position) {
+ return ByteAt(position*2 + 1);
+}
+
+const char *CellBuffer::InsertString(int position, char *s, int insertLength) {
+ char *data = 0;
+ // InsertString and DeleteChars are the bottleneck though which all changes occur
+ if (!readOnly) {
+ if (collectingUndo) {
+ // Save into the undo/redo stack, but only the characters - not the formatting
+ // This takes up about half load time
+ data = new char[insertLength / 2];
+ for (int i = 0; i < insertLength / 2; i++) {
+ data[i] = s[i * 2];
+ }
+ AppendAction(insertAction, position, data, insertLength / 2);
+ }
+
+ BasicInsertString(position, s, insertLength);
+ }
+ return data;
+}
+
+void CellBuffer::InsertCharStyle(int position, char ch, char style) {
+ char s[2];
+ s[0] = ch;
+ s[1] = style;
+ InsertString(position*2, s, 2);
+}
+
+bool CellBuffer::SetStyleAt(int position, char style, char mask) {
+ char curVal = ByteAt(position*2 + 1);
+ if ((curVal & mask) != style) {
+ SetByteAt(position*2 + 1, (curVal & ~mask) | style);
+ return true;
+ } else {
+ return false;
+ }
+}
+
+bool CellBuffer::SetStyleFor(int position, int lengthStyle, char style, char mask) {
+ int bytePos = position * 2 + 1;
+ bool changed = false;
+ while (lengthStyle--) {
+ char curVal = ByteAt(bytePos);
+ if ((curVal & mask) != style) {
+ SetByteAt(bytePos, (curVal & ~mask) | style);
+ changed = true;
+ }
+ bytePos += 2;
+ }
+ return changed;
+}
+
+void CellBuffer::EnsureUndoRoom() {
+ //Platform::DebugPrintf("%% %d action %d %d %d\n", at, position, length, currentAction);
+ if (currentAction >= 2) {
+ // Have to test that there is room for 2 more actions in the array
+ // as two actions may be created by this function
+ if (currentAction >= (lenActions - 2)) {
+ // Run out of undo nodes so extend the array
+ int lenActionsNew = lenActions * 2;
+ Action *actionsNew = new Action[lenActionsNew];
+ if (!actionsNew)
+ return;
+ for (int act = 0; act <= currentAction; act++)
+ actionsNew[act].Grab(&actions[act]);
+ delete []actions;
+ lenActions = lenActionsNew;
+ actions = actionsNew;
+ }
+ }
+}
+
+void CellBuffer::AppendAction(actionType at, int position, char *data, int lengthData) {
+ EnsureUndoRoom();
+ //Platform::DebugPrintf("%% %d action %d %d %d\n", at, position, lengthData, currentAction);
+ if (currentAction >= 2) {
+ // See if current action can be coalesced into previous action
+ // Will work if both are inserts or deletes and position is same or two different
+ if ((at != actions[currentAction - 1].at) || (abs(position - actions[currentAction - 1].position) > 2)) {
+ currentAction++;
+ } else if (currentAction == savePoint) {
+ currentAction++;
+ }
+ } else {
+ currentAction++;
+ }
+ actions[currentAction].Create(at, position, data, lengthData);
+ if ((collectingUndo == undoCollectAutoStart) && (0 == undoSequenceDepth)) {
+ currentAction++;
+ actions[currentAction].Create(startAction);
+ }
+ maxAction = currentAction;
+}
+
+const char *CellBuffer::DeleteChars(int position, int deleteLength) {
+ // InsertString and DeleteChars are the bottleneck though which all changes occur
+ char *data = 0;
+ if (!readOnly) {
+ if (collectingUndo) {
+ // Save into the undo/redo stack, but only the characters - not the formatting
+ data = new char[deleteLength / 2];
+ for (int i = 0; i < deleteLength / 2; i++) {
+ data[i] = ByteAt(position + i * 2);
+ }
+ AppendAction(removeAction, position, data, deleteLength / 2);
+ }
+
+ BasicDeleteChars(position, deleteLength);
+ }
+ return data;
+}
+
+int CellBuffer::ByteLength() {
+ return length;
+}
+
+int CellBuffer::Length() {
+ return ByteLength() / 2;
+}
+
+int CellBuffer::Lines() {
+ //Platform::DebugPrintf("Lines = %d\n", lv.lines);
+ return lv.lines;
+}
+
+int CellBuffer::LineStart(int line) {
+ if (line < 0)
+ return 0;
+ else if (line > lv.lines)
+ return length;
+ else
+ return lv.linesData[line].startPosition;
+}
+
+bool CellBuffer::IsReadOnly() {
+ return readOnly;
+}
+
+void CellBuffer::SetReadOnly(bool set) {
+ readOnly = set;
+}
+
+void CellBuffer::SetSavePoint() {
+ savePoint = currentAction;
+}
+
+bool CellBuffer::IsSavePoint() {
+ return savePoint == currentAction;
+}
+
+int CellBuffer::AddMark(int line, int markerNum) {
+ if ((line >= 0) && (line < lv.lines)) {
+ return lv.AddMark(line, markerNum);
+ }
+ return - 1;
+}
+
+void CellBuffer::DeleteMark(int line, int markerNum) {
+ if ((line >= 0) && (line < lv.lines)) {
+ lv.DeleteMark(line, markerNum);
+ }
+}
+
+void CellBuffer::DeleteMarkFromHandle(int markerHandle) {
+ lv.DeleteMarkFromHandle(markerHandle);
+}
+
+int CellBuffer::GetMark(int line) {
+ if ((line >= 0) && (line < lv.lines) && (lv.linesData[line].handleSet))
+ return lv.linesData[line].handleSet->MarkValue();
+ return 0;
+}
+
+void CellBuffer::DeleteAllMarks(int markerNum) {
+ for (int line = 0; line < lv.lines; line++) {
+ lv.DeleteMark(line, markerNum);
+ }
+}
+
+int CellBuffer::LineFromHandle(int markerHandle) {
+ return lv.LineFromHandle(markerHandle);
+}
+
+// Without undo
+
+void CellBuffer::BasicInsertString(int position, char *s, int insertLength) {
+ //Platform::DebugPrintf("Inserting at %d for %d\n", position, insertLength);
+ if (insertLength == 0)
+ return;
+ RoomFor(insertLength);
+ GapTo(position);
+
+ memcpy(body + part1len, s, insertLength);
+ length += insertLength;
+ part1len += insertLength;
+ gaplen -= insertLength;
+ part2body = body + gaplen;
+
+ int lineInsert = lv.LineFromPosition(position / 2) + 1;
+ // Point all the lines after the insertion point further along in the buffer
+ for (int lineAfter = lineInsert; lineAfter <= lv.lines; lineAfter++) {
+ lv.linesData[lineAfter].startPosition += insertLength / 2;
+ }
+ char chPrev = ' ';
+ if ((position - 2) >= 0)
+ chPrev = ByteAt(position - 2);
+ char chAfter = ' ';
+ if ((position + insertLength) < length)
+ chAfter = ByteAt(position + insertLength);
+ if (chPrev == '\r' && chAfter == '\n') {
+ //Platform::DebugPrintf("Splitting a crlf pair at %d\n", lineInsert);
+ // Splitting up a crlf pair at position
+ lv.InsertValue(lineInsert, position / 2);
+ lineInsert++;
+ }
+ char ch = ' ';
+ for (int i = 0; i < insertLength; i += 2) {
+ ch = s[i];
+ if (ch == '\r') {
+ //Platform::DebugPrintf("Inserting cr at %d\n", lineInsert);
+ lv.InsertValue(lineInsert, (position + i) / 2 + 1);
+ lineInsert++;
+ } else if (ch == '\n') {
+ if (chPrev == '\r') {
+ //Platform::DebugPrintf("Patching cr before lf at %d\n", lineInsert-1);
+ // Patch up what was end of line
+ lv.SetValue(lineInsert - 1, (position + i) / 2 + 1);
+ } else {
+ //Platform::DebugPrintf("Inserting lf at %d\n", lineInsert);
+ lv.InsertValue(lineInsert, (position + i) / 2 + 1);
+ lineInsert++;
+ }
+ }
+ chPrev = ch;
+ }
+ // Joining two lines where last insertion is cr and following text starts with lf
+ if (chAfter == '\n') {
+ if (ch == '\r') {
+ //Platform::DebugPrintf("Joining cr before lf at %d\n", lineInsert-1);
+ // End of line already in buffer so drop the newly created one
+ lv.Remove(lineInsert - 1);
+ }
+ }
+}
+
+void CellBuffer::BasicDeleteChars(int position, int deleteLength) {
+ //Platform::DebugPrintf("Deleting at %d for %d\n", position, deleteLength);
+ if (deleteLength == 0)
+ return;
+
+ if ((position == 0) && (deleteLength == length)) {
+ // If whole buffer is being deleted, faster to reinitialise lines data
+ // than to delete each line.
+ //printf("Whole buffer being deleted\n");
+ lv.Init();
+ } else {
+ // Have to fix up line positions before doing deletion as looking at text in buffer
+ // to work out which lines have been removed
+
+ int lineRemove = lv.LineFromPosition(position / 2) + 1;
+ // Point all the lines after the insertion point further along in the buffer
+ for (int lineAfter = lineRemove; lineAfter <= lv.lines; lineAfter++) {
+ lv.linesData[lineAfter].startPosition -= deleteLength / 2;
+ }
+ char chPrev = ' ';
+ if (position >= 2)
+ chPrev = ByteAt(position - 2);
+ char chBefore = chPrev;
+ char chNext = ' ';
+ if (position < length)
+ chNext = ByteAt(position);
+ bool ignoreNL = false;
+ if (chPrev == '\r' && chNext == '\n') {
+ //Platform::DebugPrintf("Deleting lf after cr, move line end to cr at %d\n", lineRemove);
+ // Move back one
+ lv.SetValue(lineRemove, position / 2);
+ lineRemove++;
+ ignoreNL = true; // First \n is not real deletion
+ }
+
+ char ch = chNext;
+ for (int i = 0; i < deleteLength; i += 2) {
+ chNext = ' ';
+ if ((position + i + 2) < length)
+ chNext = ByteAt(position + i + 2);
+ //Platform::DebugPrintf("Deleting %d %x\n", i, ch);
+ if (ch == '\r') {
+ if (chNext != '\n') {
+ //Platform::DebugPrintf("Removing cr end of line\n");
+ lv.Remove(lineRemove);
+ }
+ } else if ((ch == '\n') && !ignoreNL) {
+ //Platform::DebugPrintf("Removing lf end of line\n");
+ lv.Remove(lineRemove);
+ ignoreNL = false; // Further \n are not real deletions
+ }
+
+ ch = chNext;
+ }
+ // May have to fix up end if last deletion causes cr to be next to lf
+ // or removes one of a crlf pair
+ char chAfter = ' ';
+ if ((position + deleteLength) < length)
+ chAfter = ByteAt(position + deleteLength);
+ if (chBefore == '\r' && chAfter == '\n') {
+ //d.printf("Joining cr before lf at %d\n", lineRemove);
+ // Using lineRemove-1 as cr ended line before start of deletion
+ lv.Remove(lineRemove - 1);
+ lv.SetValue(lineRemove - 1, position / 2 + 1);
+ }
+ }
+ GapTo(position);
+ length -= deleteLength;
+ gaplen += deleteLength;
+ part2body = body + gaplen;
+}
+
+undoCollectionType CellBuffer::SetUndoCollection(undoCollectionType collectUndo) {
+ collectingUndo = collectUndo;
+ undoSequenceDepth = 0;
+ return collectingUndo;
+}
+
+bool CellBuffer::IsCollectingUndo() {
+ return collectingUndo;
+}
+
+void CellBuffer::AppendUndoStartAction() {
+ EnsureUndoRoom();
+ // Finish any currently active undo sequence
+ undoSequenceDepth = 0;
+ if (actions[currentAction].at != startAction) {
+ undoSequenceDepth++;
+ currentAction++;
+ actions[currentAction].Create(startAction);
+ maxAction = currentAction;
+ }
+}
+
+void CellBuffer::BeginUndoAction() {
+ EnsureUndoRoom();
+ if (undoSequenceDepth == 0) {
+ if (actions[currentAction].at != startAction) {
+ currentAction++;
+ actions[currentAction].Create(startAction);
+ maxAction = currentAction;
+ }
+ }
+ undoSequenceDepth++;
+}
+
+void CellBuffer::EndUndoAction() {
+ EnsureUndoRoom();
+ undoSequenceDepth--;
+ if (0 == undoSequenceDepth) {
+ if (actions[currentAction].at != startAction) {
+ currentAction++;
+ actions[currentAction].Create(startAction);
+ maxAction = currentAction;
+ }
+ }
+}
+
+void CellBuffer::DeleteUndoHistory() {
+ for (int i = 1; i < maxAction; i++)
+ actions[i].Destroy();
+ maxAction = 0;
+ currentAction = 0;
+ savePoint = 0;
+}
+
+bool CellBuffer::CanUndo() {
+ return (!readOnly) && ((currentAction > 0) && (maxAction > 0));
+}
+
+int CellBuffer::StartUndo() {
+ // Drop any trailing startAction
+ if (actions[currentAction].at == startAction && currentAction > 0)
+ currentAction--;
+
+ // Count the steps in this action
+ int act = currentAction;
+ while (actions[act].at != startAction && act > 0) {
+ act--;
+ }
+ return currentAction - act;
+}
+
+const Action &CellBuffer::UndoStep() {
+ const Action &actionStep = actions[currentAction];
+ if (actionStep.at == insertAction) {
+ BasicDeleteChars(actionStep.position, actionStep.lenData*2);
+ } else if (actionStep.at == removeAction) {
+ char *styledData = new char[actionStep.lenData * 2];
+ for (int i = 0; i < actionStep.lenData; i++) {
+ styledData[i*2] = actionStep.data[i];
+ styledData[i*2+1] = 0;
+ }
+ BasicInsertString(actionStep.position, styledData, actionStep.lenData*2);
+ delete []styledData;
+ }
+ currentAction--;
+ return actionStep;
+}
+
+bool CellBuffer::CanRedo() {
+ return (!readOnly) && (maxAction > currentAction);
+}
+
+int CellBuffer::StartRedo() {
+ // Drop any leading startAction
+ if (actions[currentAction].at == startAction && currentAction < maxAction)
+ currentAction++;
+
+ // Count the steps in this action
+ int act = currentAction;
+ while (actions[act].at != startAction && act < maxAction) {
+ act++;
+ }
+ return act - currentAction;
+}
+
+const Action &CellBuffer::RedoStep() {
+ const Action &actionStep = actions[currentAction];
+ if (actionStep.at == insertAction) {
+ char *styledData = new char[actionStep.lenData * 2];
+ for (int i = 0; i < actionStep.lenData; i++) {
+ styledData[i*2] = actionStep.data[i];
+ styledData[i*2+1] = 0;
+ }
+ BasicInsertString(actionStep.position, styledData, actionStep.lenData*2);
+ delete []styledData;
+ } else if (actionStep.at == removeAction) {
+ BasicDeleteChars(actionStep.position, actionStep.lenData*2);
+ }
+ currentAction++;
+ return actionStep;
+}
+
+int CellBuffer::SetLineState(int line, int state) {
+ int stateOld = lineStates[line];
+ lineStates[line] = state;
+ return stateOld;
+}
+
+int CellBuffer::GetLineState(int line) {
+ return lineStates[line];
+}
+
+int CellBuffer::GetMaxLineState() {
+ return lineStates.Length();
+}
+
+int CellBuffer::SetLevel(int line, int level) {
+ int prev = 0;
+ if ((line >= 0) && (line < lv.lines)) {
+ if (!lv.levels) {
+ lv.ExpandLevels();
+ }
+ prev = lv.levels[line];
+ if (lv.levels[line] != level) {
+ lv.levels[line] = level;
+ }
+ }
+ return prev;
+}
+
+int CellBuffer::GetLevel(int line) {
+ if (lv.levels && (line >= 0) && (line < lv.lines)) {
+ return lv.levels[line];
+ } else {
+ return SC_FOLDLEVELBASE;
+ }
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-11 19:40:02 +0000