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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "highlighter.h"
#include "tabsettings.h"
#include "textdocumentlayout.h"
#include <coreplugin/editormanager/documentmodel.h>
#include <coreplugin/icore.h>
#include <coreplugin/messagemanager.h>
#include <utils/mimeutils.h>
#include <utils/qtcassert.h>
#include <utils/stylehelper.h>
#include <KSyntaxHighlighting/Definition>
#include <KSyntaxHighlighting/DefinitionDownloader>
#include <KSyntaxHighlighting/FoldingRegion>
#include <KSyntaxHighlighting/Format>
#include <KSyntaxHighlighting/Repository>
#include <KSyntaxHighlighting/SyntaxHighlighter>
#include <QLoggingCategory>
#include <QMetaEnum>
using namespace Utils;
namespace TextEditor {
static Q_LOGGING_CATEGORY(highlighterLog, "qtc.editor.highlighter", QtWarningMsg)
TextStyle categoryForTextStyle(int style)
{
switch (style) {
case KSyntaxHighlighting::Theme::Normal: return C_TEXT;
case KSyntaxHighlighting::Theme::Keyword: return C_KEYWORD;
case KSyntaxHighlighting::Theme::Function: return C_FUNCTION;
case KSyntaxHighlighting::Theme::Variable: return C_LOCAL;
case KSyntaxHighlighting::Theme::ControlFlow: return C_KEYWORD;
case KSyntaxHighlighting::Theme::Operator: return C_OPERATOR;
case KSyntaxHighlighting::Theme::BuiltIn: return C_PRIMITIVE_TYPE;
case KSyntaxHighlighting::Theme::Extension: return C_GLOBAL;
case KSyntaxHighlighting::Theme::Preprocessor: return C_PREPROCESSOR;
case KSyntaxHighlighting::Theme::Attribute: return C_LOCAL;
case KSyntaxHighlighting::Theme::Char: return C_STRING;
case KSyntaxHighlighting::Theme::SpecialChar: return C_STRING;
case KSyntaxHighlighting::Theme::String: return C_STRING;
case KSyntaxHighlighting::Theme::VerbatimString: return C_STRING;
case KSyntaxHighlighting::Theme::SpecialString: return C_STRING;
case KSyntaxHighlighting::Theme::Import: return C_PREPROCESSOR;
case KSyntaxHighlighting::Theme::DataType: return C_TYPE;
case KSyntaxHighlighting::Theme::DecVal: return C_NUMBER;
case KSyntaxHighlighting::Theme::BaseN: return C_NUMBER;
case KSyntaxHighlighting::Theme::Float: return C_NUMBER;
case KSyntaxHighlighting::Theme::Constant: return C_KEYWORD;
case KSyntaxHighlighting::Theme::Comment: return C_COMMENT;
case KSyntaxHighlighting::Theme::Documentation: return C_DOXYGEN_COMMENT;
case KSyntaxHighlighting::Theme::Annotation: return C_DOXYGEN_TAG;
case KSyntaxHighlighting::Theme::CommentVar: return C_DOXYGEN_TAG;
case KSyntaxHighlighting::Theme::RegionMarker: return C_PREPROCESSOR;
case KSyntaxHighlighting::Theme::Information: return C_WARNING;
case KSyntaxHighlighting::Theme::Warning: return C_WARNING;
case KSyntaxHighlighting::Theme::Alert: return C_ERROR;
case KSyntaxHighlighting::Theme::Error: return C_ERROR;
case KSyntaxHighlighting::Theme::Others: return C_TEXT;
}
return C_TEXT;
}
Highlighter::Highlighter(const QString &definitionFilesPath)
: m_repository(new KSyntaxHighlighting::Repository())
{
m_repository->addCustomSearchPath(definitionFilesPath);
const Utils::FilePath dir = Core::ICore::resourcePath("generic-highlighter/syntax");
if (dir.exists())
m_repository->addCustomSearchPath(dir.parentDir().path());
m_repository->reload();
setTextFormatCategories(QMetaEnum::fromType<KSyntaxHighlighting::Theme::TextStyle>().keyCount(),
&categoryForTextStyle);
}
Highlighter::~Highlighter() = default;
void Highlighter::setDefinitionName(const QString &name)
{
KSyntaxHighlighting::AbstractHighlighter::setDefinition(m_repository->definitionForName(name));
}
static bool isOpeningParenthesis(QChar c)
{
return c == QLatin1Char('{') || c == QLatin1Char('[') || c == QLatin1Char('(');
}
static bool isClosingParenthesis(QChar c)
{
return c == QLatin1Char('}') || c == QLatin1Char(']') || c == QLatin1Char(')');
}
void Highlighter::highlightBlock(const QString &text)
{
if (!definition().isValid()) {
formatSpaces(text);
return;
}
QTextBlock block = currentBlock();
const QTextBlock previousBlock = block.previous();
TextDocumentLayout::setBraceDepth(block, TextDocumentLayout::braceDepth(previousBlock));
KSyntaxHighlighting::State previousLineState;
if (TextBlockUserData *data = TextDocumentLayout::textUserData(previousBlock))
previousLineState = data->syntaxState();
KSyntaxHighlighting::State oldState;
if (TextBlockUserData *data = TextDocumentLayout::textUserData(block)) {
oldState = data->syntaxState();
data->setFoldingStartIncluded(false);
data->setFoldingEndIncluded(false);
}
KSyntaxHighlighting::State state = highlightLine(text, previousLineState);
if (oldState != state) {
TextBlockUserData *data = TextDocumentLayout::userData(block);
data->setSyntaxState(state);
// Toggles the LSB of current block's userState. It forces rehighlight of next block.
setCurrentBlockState(currentBlockState() ^ 1);
}
Parentheses parentheses;
int pos = 0;
for (const QChar &c : text) {
if (isOpeningParenthesis(c))
parentheses.push_back(Parenthesis(Parenthesis::Opened, c, pos));
else if (isClosingParenthesis(c))
parentheses.push_back(Parenthesis(Parenthesis::Closed, c, pos));
pos++;
}
TextDocumentLayout::setParentheses(currentBlock(), parentheses);
const QTextBlock nextBlock = block.next();
if (nextBlock.isValid()) {
TextBlockUserData *data = TextDocumentLayout::userData(nextBlock);
data->setFoldingIndent(TextDocumentLayout::braceDepth(block));
}
formatSpaces(text);
}
void Highlighter::applyFormat(int offset, int length, const KSyntaxHighlighting::Format &format)
{
const KSyntaxHighlighting::Theme defaultTheme;
QTextCharFormat qformat = formatForCategory(format.textStyle());
if (format.hasTextColor(defaultTheme)) {
const QColor textColor = format.textColor(defaultTheme);
if (format.hasBackgroundColor(defaultTheme)) {
const QColor backgroundColor = format.hasBackgroundColor(defaultTheme);
if (StyleHelper::isReadableOn(backgroundColor, textColor)) {
qformat.setForeground(textColor);
qformat.setBackground(backgroundColor);
} else if (StyleHelper::isReadableOn(qformat.background().color(), textColor)) {
qformat.setForeground(textColor);
}
} else if (StyleHelper::isReadableOn(qformat.background().color(), textColor)) {
qformat.setForeground(textColor);
}
} else if (format.hasBackgroundColor(defaultTheme)) {
const QColor backgroundColor = format.hasBackgroundColor(defaultTheme);
if (StyleHelper::isReadableOn(backgroundColor, qformat.foreground().color()))
qformat.setBackground(backgroundColor);
}
if (format.isBold(defaultTheme))
qformat.setFontWeight(QFont::Bold);
if (format.isItalic(defaultTheme))
qformat.setFontItalic(true);
if (format.isUnderline(defaultTheme))
qformat.setFontUnderline(true);
if (format.isStrikeThrough(defaultTheme))
qformat.setFontStrikeOut(true);
setFormat(offset, length, qformat);
}
void Highlighter::applyFolding(int offset,
int length,
KSyntaxHighlighting::FoldingRegion region)
{
if (!region.isValid())
return;
QTextBlock block = currentBlock();
const QString &text = block.text();
TextBlockUserData *data = TextDocumentLayout::userData(currentBlock());
const bool fromStart = TabSettings::firstNonSpace(text) == offset;
const bool toEnd = (offset + length) == (text.length() - TabSettings::trailingWhitespaces(text));
if (region.type() == KSyntaxHighlighting::FoldingRegion::Begin) {
const int newBraceDepth = TextDocumentLayout::braceDepth(block) + 1;
TextDocumentLayout::setBraceDepth(block, newBraceDepth);
qCDebug(highlighterLog) << "Found folding start from '" << offset << "' to '" << length
<< "' resulting in the bracedepth '" << newBraceDepth << "' in :";
qCDebug(highlighterLog) << text;
// if there is only a folding begin marker in the line move the current block into the fold
if (fromStart && toEnd && length <= 1) {
data->setFoldingIndent(TextDocumentLayout::braceDepth(block));
data->setFoldingStartIncluded(true);
}
} else if (region.type() == KSyntaxHighlighting::FoldingRegion::End) {
const int newBraceDepth = qMax(0, TextDocumentLayout::braceDepth(block) - 1);
qCDebug(highlighterLog) << "Found folding end from '" << offset << "' to '" << length
<< "' resulting in the bracedepth '" << newBraceDepth << "' in :";
qCDebug(highlighterLog) << text;
TextDocumentLayout::setBraceDepth(block, newBraceDepth);
// if the folding end is at the end of the line move the current block into the fold
if (toEnd)
data->setFoldingEndIncluded(true);
else
data->setFoldingIndent(TextDocumentLayout::braceDepth(block));
}
}
} // TextEditor
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