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// Scintilla source code edit control
// ContractionState.cxx - manages visibility of lines for folding
// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include "Platform.h"
#include "ContractionState.h"
OneLine::OneLine() {
displayLine = 0;
docLine = 0;
visible = true;
expanded = true;
}
ContractionState::ContractionState() {
lines = 0;
size = 0;
linesInDoc = 1;
linesInDisplay = 1;
valid = false;
}
ContractionState::~ContractionState() {
Clear();
}
void ContractionState::MakeValid() const {
if (!valid) {
// Could be cleverer by keeping the index of the last still valid entry
// rather than invalidating all.
int lineDisplay = 0;
for (int line=0; line<linesInDoc; line++) {
lines[line].displayLine = lineDisplay;
if (lines[line].visible) {
lines[lineDisplay].docLine = line;
lineDisplay++;
}
}
valid = true;
}
}
void ContractionState::Clear() {
delete []lines;
lines = 0;
size = 0;
linesInDoc = 1;
linesInDisplay = 1;
}
int ContractionState::LinesInDoc() const {
return linesInDoc;
}
int ContractionState::LinesDisplayed() const {
return linesInDisplay;
}
int ContractionState::DisplayFromDoc(int lineDoc) const {
if (size == 0) {
return lineDoc;
}
MakeValid();
if ((lineDoc >= 0) && (lineDoc < linesInDoc)) {
return lines[lineDoc].displayLine;
}
return -1;
}
int ContractionState::DocFromDisplay(int lineDisplay) const {
if (lineDisplay <= 0)
return 0;
if (lineDisplay >= linesInDisplay)
return linesInDoc-1;
if (size == 0)
return lineDisplay;
MakeValid();
return lines[lineDisplay].docLine;
}
void ContractionState::Grow(int sizeNew) {
OneLine *linesNew = new OneLine[sizeNew];
if (linesNew) {
int i = 0;
for (; i < size; i++) {
linesNew[i] = lines[i];
}
for (; i < sizeNew; i++) {
linesNew[i].displayLine = i;
}
delete []lines;
lines = linesNew;
size = sizeNew;
valid = false;
} else {
Platform::DebugPrintf("No memory available\n");
// TODO: Blow up
}
}
void ContractionState::InsertLines(int lineDoc, int lineCount) {
if (size == 0) {
linesInDoc += lineCount;
linesInDisplay += lineCount;
return;
}
//Platform::DebugPrintf("InsertLine[%d] = %d\n", lineDoc);
if ((linesInDoc + lineCount + 2) >= size) {
Grow(linesInDoc + lineCount + growSize);
}
linesInDoc += lineCount;
linesInDisplay += lineCount;
for (int i = linesInDoc; i >= lineDoc + lineCount; i--) {
lines[i].visible = lines[i - lineCount].visible;
lines[i].expanded = lines[i - lineCount].expanded;
}
for (int d=0;d<lineCount;d++) {
lines[lineDoc+d].visible = true; // Should inherit visibility from context ?
lines[lineDoc+d].expanded = true;
}
valid = false;
}
void ContractionState::DeleteLines(int lineDoc, int lineCount) {
if (size == 0) {
linesInDoc -= lineCount;
linesInDisplay -= lineCount;
return;
}
int deltaDisplayed = 0;
for (int d=0;d<lineCount;d++) {
if (lines[lineDoc+d].visible)
deltaDisplayed--;
}
for (int i = lineDoc; i < linesInDoc-lineCount; i++) {
if (i != 0) // Line zero is always visible
lines[i].visible = lines[i + lineCount].visible;
lines[i].expanded = lines[i + lineCount].expanded;
}
linesInDoc -= lineCount;
linesInDisplay += deltaDisplayed;
valid = false;
}
bool ContractionState::GetVisible(int lineDoc) const {
if (size == 0)
return true;
if ((lineDoc >= 0) && (lineDoc < linesInDoc)) {
return lines[lineDoc].visible;
} else {
return false;
}
}
bool ContractionState::SetVisible(int lineDocStart, int lineDocEnd, bool visible) {
if (lineDocStart == 0)
lineDocStart++;
if (lineDocStart > lineDocEnd)
return false;
if (size == 0) {
Grow(linesInDoc + growSize);
}
// TODO: modify docLine members to mirror displayLine
int delta = 0;
// Change lineDocs
if ((lineDocStart <= lineDocEnd) && (lineDocStart >= 0) && (lineDocEnd < linesInDoc)) {
for (int line=lineDocStart; line <= lineDocEnd; line++) {
if (lines[line].visible != visible) {
delta += visible ? 1 : -1;
lines[line].visible = visible;
}
}
}
linesInDisplay += delta;
valid = false;
return delta != 0;
}
bool ContractionState::GetExpanded(int lineDoc) const {
if (size == 0)
return true;
if ((lineDoc >= 0) && (lineDoc < linesInDoc)) {
return lines[lineDoc].expanded;
} else {
return false;
}
}
bool ContractionState::SetExpanded(int lineDoc, bool expanded) {
if (size == 0) {
Grow(linesInDoc + growSize);
}
if ((lineDoc >= 0) && (lineDoc < linesInDoc)) {
if (lines[lineDoc].expanded != expanded) {
lines[lineDoc].expanded = expanded;
return true;
}
}
return false;
}
void ContractionState::ShowAll() {
delete []lines;
lines = 0;
size = 0;
}
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