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/*
SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org>
SPDX-License-Identifier: MIT
*/
#include "syntaxhighlighter.h"
#include "abstracthighlighter_p.h"
#include "definition.h"
#include "definition_p.h"
#include "foldingregion.h"
#include "format.h"
#include "format_p.h"
#include "state.h"
#include "theme.h"
#include "themedata_p.h"
Q_DECLARE_METATYPE(QTextBlock)
using namespace KSyntaxHighlighting;
namespace KSyntaxHighlighting
{
class TextBlockUserData : public QTextBlockUserData
{
public:
State state;
QList<FoldingRegion> foldingRegions;
};
class SyntaxHighlighterPrivate : public AbstractHighlighterPrivate
{
public:
static FoldingRegion foldingRegion(const QTextBlock &startBlock);
void initTextFormat(QTextCharFormat &tf, const Format &format);
void computeTextFormats();
struct TextFormat {
QTextCharFormat tf;
/**
* id to check that the format belongs to the definition
*/
std::intptr_t ptrId;
};
QList<FoldingRegion> foldingRegions;
std::vector<TextFormat> tfs;
};
}
FoldingRegion SyntaxHighlighterPrivate::foldingRegion(const QTextBlock &startBlock)
{
const auto data = dynamic_cast<TextBlockUserData *>(startBlock.userData());
if (!data) {
return FoldingRegion();
}
for (int i = data->foldingRegions.size() - 1; i >= 0; --i) {
if (data->foldingRegions.at(i).type() == FoldingRegion::Begin) {
return data->foldingRegions.at(i);
}
}
return FoldingRegion();
}
void SyntaxHighlighterPrivate::initTextFormat(QTextCharFormat &tf, const Format &format)
{
// always set the foreground color to avoid palette issues
tf.setForeground(format.textColor(m_theme));
if (format.hasBackgroundColor(m_theme)) {
tf.setBackground(format.backgroundColor(m_theme));
}
if (format.isBold(m_theme)) {
tf.setFontWeight(QFont::Bold);
}
if (format.isItalic(m_theme)) {
tf.setFontItalic(true);
}
if (format.isUnderline(m_theme)) {
tf.setFontUnderline(true);
}
if (format.isStrikeThrough(m_theme)) {
tf.setFontStrikeOut(true);
}
}
void SyntaxHighlighterPrivate::computeTextFormats()
{
auto definitions = m_definition.includedDefinitions();
definitions.append(m_definition);
int maxId = 0;
for (const auto &definition : std::as_const(definitions)) {
for (const auto &format : std::as_const(DefinitionData::get(definition)->formats)) {
maxId = qMax(maxId, format.id());
}
}
tfs.clear();
tfs.resize(maxId + 1);
// initialize tfs
for (const auto &definition : std::as_const(definitions)) {
for (const auto &format : std::as_const(DefinitionData::get(definition)->formats)) {
auto &tf = tfs[format.id()];
tf.ptrId = FormatPrivate::ptrId(format);
initTextFormat(tf.tf, format);
}
}
}
SyntaxHighlighter::SyntaxHighlighter(QObject *parent)
: QSyntaxHighlighter(parent)
, AbstractHighlighter(new SyntaxHighlighterPrivate)
{
qRegisterMetaType<QTextBlock>();
}
SyntaxHighlighter::SyntaxHighlighter(QTextDocument *document)
: QSyntaxHighlighter(document)
, AbstractHighlighter(new SyntaxHighlighterPrivate)
{
qRegisterMetaType<QTextBlock>();
}
SyntaxHighlighter::~SyntaxHighlighter()
{
}
void SyntaxHighlighter::setDefinition(const Definition &def)
{
Q_D(SyntaxHighlighter);
const auto needsRehighlight = d->m_definition != def;
if (DefinitionData::get(d->m_definition) != DefinitionData::get(def)) {
d->m_definition = def;
d->tfs.clear();
}
if (needsRehighlight) {
rehighlight();
}
}
void SyntaxHighlighter::setTheme(const Theme &theme)
{
Q_D(SyntaxHighlighter);
if (ThemeData::get(d->m_theme) != ThemeData::get(theme)) {
d->m_theme = theme;
d->tfs.clear();
}
}
bool SyntaxHighlighter::startsFoldingRegion(const QTextBlock &startBlock) const
{
return SyntaxHighlighterPrivate::foldingRegion(startBlock).type() == FoldingRegion::Begin;
}
QTextBlock SyntaxHighlighter::findFoldingRegionEnd(const QTextBlock &startBlock) const
{
const auto region = SyntaxHighlighterPrivate::foldingRegion(startBlock);
auto block = startBlock;
int depth = 1;
while (block.isValid()) {
block = block.next();
const auto data = dynamic_cast<TextBlockUserData *>(block.userData());
if (!data) {
continue;
}
for (const auto &foldingRegion : std::as_const(data->foldingRegions)) {
if (foldingRegion.id() != region.id()) {
continue;
}
if (foldingRegion.type() == FoldingRegion::End) {
--depth;
} else if (foldingRegion.type() == FoldingRegion::Begin) {
++depth;
}
if (depth == 0) {
return block;
}
}
}
return QTextBlock();
}
void SyntaxHighlighter::highlightBlock(const QString &text)
{
Q_D(SyntaxHighlighter);
static const State emptyState;
const State *previousState = &emptyState;
if (currentBlock().position() > 0) {
const auto prevBlock = currentBlock().previous();
const auto prevData = dynamic_cast<TextBlockUserData *>(prevBlock.userData());
if (prevData) {
previousState = &prevData->state;
}
}
d->foldingRegions.clear();
auto newState = highlightLine(text, *previousState);
auto data = dynamic_cast<TextBlockUserData *>(currentBlockUserData());
if (!data) { // first time we highlight this
data = new TextBlockUserData;
data->state = std::move(newState);
data->foldingRegions = d->foldingRegions;
setCurrentBlockUserData(data);
return;
}
if (data->state == newState && data->foldingRegions == d->foldingRegions) { // we ended up in the same state, so we are done here
return;
}
data->state = std::move(newState);
data->foldingRegions = d->foldingRegions;
const auto nextBlock = currentBlock().next();
if (nextBlock.isValid()) {
QMetaObject::invokeMethod(this, "rehighlightBlock", Qt::QueuedConnection, Q_ARG(QTextBlock, nextBlock));
}
}
void SyntaxHighlighter::applyFormat(int offset, int length, const Format &format)
{
if (length == 0) {
return;
}
Q_D(SyntaxHighlighter);
if (Q_UNLIKELY(d->tfs.empty())) {
d->computeTextFormats();
}
const auto id = static_cast<std::size_t>(format.id());
// This doesn't happen when format comes from the definition.
// But as the user can override the function to pass any format, this is a possible scenario.
if (id < d->tfs.size() && d->tfs[id].ptrId == FormatPrivate::ptrId(format)) {
QSyntaxHighlighter::setFormat(offset, length, d->tfs[id].tf);
} else {
QTextCharFormat tf;
d->initTextFormat(tf, format);
QSyntaxHighlighter::setFormat(offset, length, tf);
}
}
void SyntaxHighlighter::applyFolding(int offset, int length, FoldingRegion region)
{
Q_UNUSED(offset);
Q_UNUSED(length);
Q_D(SyntaxHighlighter);
if (region.type() == FoldingRegion::Begin) {
d->foldingRegions.push_back(region);
}
if (region.type() == FoldingRegion::End) {
for (int i = d->foldingRegions.size() - 1; i >= 0; --i) {
if (d->foldingRegions.at(i).id() != region.id() || d->foldingRegions.at(i).type() != FoldingRegion::Begin) {
continue;
}
d->foldingRegions.remove(i);
return;
}
d->foldingRegions.push_back(region);
}
}
#include "moc_syntaxhighlighter.cpp"
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