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#include "baseeditordocumentprocessor.h"
#include "cppworkingcopy.h"

#include "cpptoolsreuse.h"
#include "editordocumenthandle.h"

#include <texteditor/fontsettings.h>
#include <texteditor/texteditorsettings.h>

#include <utils/qtcassert.h>

#include <QTextBlock>

namespace CppTools {

/*!
    \class CppTools::BaseEditorDocumentProcessor

    \brief The BaseEditorDocumentProcessor class controls and executes all
           document relevant actions (reparsing, semantic highlighting, additional
           semantic calculations) after a text document has changed.
*/

BaseEditorDocumentProcessor::BaseEditorDocumentProcessor(
        TextEditor::TextDocument *document)
    : m_baseTextDocument(document)
{
    QTC_CHECK(document);
}

BaseEditorDocumentProcessor::~BaseEditorDocumentProcessor()
{
}

TextEditor::TextDocument *BaseEditorDocumentProcessor::baseTextDocument() const
{
    return m_baseTextDocument;
}

TextEditor::QuickFixOperations
BaseEditorDocumentProcessor::extraRefactoringOperations(const TextEditor::AssistInterface &)
{
    return TextEditor::QuickFixOperations();
}

BaseEditorDocumentProcessor *BaseEditorDocumentProcessor::get(const QString &filePath)
{
    CppModelManager *cmmi = CppModelManager::instance();
    if (CppEditorDocumentHandle *cppEditorDocument = cmmi->cppEditorDocument(filePath))
        return cppEditorDocument->processor();
    return 0;
}

QList<QTextEdit::ExtraSelection> BaseEditorDocumentProcessor::toTextEditorSelections(
        const QList<CPlusPlus::Document::DiagnosticMessage> &diagnostics,
        QTextDocument *textDocument)
{
    const TextEditor::FontSettings &fontSettings = TextEditor::TextEditorSettings::instance()->fontSettings();

    QTextCharFormat warningFormat = fontSettings.toTextCharFormat(TextEditor::C_WARNING);
    QTextCharFormat errorFormat = fontSettings.toTextCharFormat(TextEditor::C_ERROR);

    QList<QTextEdit::ExtraSelection> result;
    foreach (const CPlusPlus::Document::DiagnosticMessage &m, diagnostics) {
        QTextEdit::ExtraSelection sel;
        if (m.isWarning())
            sel.format = warningFormat;
        else
            sel.format = errorFormat;

        QTextCursor c(textDocument->findBlockByNumber(m.line() - 1));
        const QString text = c.block().text();
        const int startPos = m.column() > 0 ? m.column() - 1 : 0;
        if (m.length() > 0 && startPos + m.length() <= (unsigned)text.size()) {
            c.setPosition(c.position() + startPos);
            c.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, m.length());
        } else {
            for (int i = 0; i < text.size(); ++i) {
                if (!text.at(i).isSpace()) {
                    c.setPosition(c.position() + i);
                    break;
                }
            }
            c.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
        }
        sel.cursor = c;
        sel.format.setToolTip(m.text());
        result.append(sel);
    }

    return result;
}

void BaseEditorDocumentProcessor::runParser(QFutureInterface<void> &future,
                                            BaseEditorDocumentParser::Ptr parser,
                                            BaseEditorDocumentParser::InMemoryInfo info)
{
    future.setProgressRange(0, 1);
    if (future.isCanceled()) {
        future.setProgressValue(1);
        return;
    }

    parser->update(info);
    CppModelManager::instance()
        ->finishedRefreshingSourceFiles(QSet<QString>() << parser->filePath());

    future.setProgressValue(1);
}

} // namespace CppTools
