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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** This file is part of Qt Creator.
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#include "plaintexteditor.h"
#include "tabsettings.h"
#include "texteditorconstants.h"
#include "texteditorplugin.h"
#include "texteditorsettings.h"
#include "basetextdocument.h"
#include "highlightdefinition.h"
#include "highlighter.h"
#include "highlighterexception.h"
#include "highlightersettings.h"
#include "manager.h"
#include "context.h"
#include "normalindenter.h"
#include "fontsettings.h"

#include <coreplugin/coreconstants.h>
#include <coreplugin/icore.h>
#include <coreplugin/mimedatabase.h>

#include <QSharedPointer>
#include <QFileInfo>

#include <QDebug>

using namespace TextEditor;
using namespace TextEditor::Internal;

PlainTextEditor::PlainTextEditor(PlainTextEditorWidget *editor)
  : BaseTextEditor(editor)
{
    setContext(Core::Context(Core::Constants::K_DEFAULT_TEXT_EDITOR_ID,
                             TextEditor::Constants::C_TEXTEDITOR));
}

PlainTextEditorWidget::PlainTextEditorWidget(QWidget *parent)
  : BaseTextEditorWidget(parent),
  m_isMissingSyntaxDefinition(false),
  m_ignoreMissingSyntaxDefinition(false)
{
    setRevisionsVisible(true);
    setMarksVisible(true);
    setLineSeparatorsAllowed(true);
    setIndenter(new NormalIndenter); // Currently only "normal" indentation is supported.

    setMimeType(QLatin1String(TextEditor::Constants::C_TEXTEDITOR_MIMETYPE_TEXT));
    setDisplayName(tr(Core::Constants::K_DEFAULT_TEXT_EDITOR_DISPLAY_NAME));

    m_commentDefinition.clearCommentStyles();

    connect(editorDocument(), SIGNAL(changed()), this, SLOT(configure()));
    connect(Manager::instance(), SIGNAL(mimeTypesRegistered()), this, SLOT(configure()));
}

Core::IEditor *PlainTextEditor::duplicate(QWidget *parent)
{
    PlainTextEditorWidget *newWidget = new PlainTextEditorWidget(parent);
    newWidget->duplicateFrom(editorWidget());
    TextEditorPlugin::instance()->initializeEditor(newWidget);
    return newWidget->editor();
}

Core::Id PlainTextEditor::id() const
{
    return Core::Constants::K_DEFAULT_TEXT_EDITOR_ID;
}

void PlainTextEditorWidget::unCommentSelection()
{
    Utils::unCommentSelection(this, m_commentDefinition);
}

void PlainTextEditorWidget::setFontSettings(const FontSettings &fs)
{
    BaseTextEditorWidget::setFontSettings(fs);

    if (baseTextDocument()->syntaxHighlighter()) {
        Highlighter *highlighter =
            static_cast<Highlighter *>(baseTextDocument()->syntaxHighlighter());

        highlighter->configureFormat(Highlighter::VisualWhitespace, fs.toTextCharFormat(C_VISUAL_WHITESPACE));
        highlighter->configureFormat(Highlighter::Keyword, fs.toTextCharFormat(C_KEYWORD));
        highlighter->configureFormat(Highlighter::DataType, fs.toTextCharFormat(C_TYPE));
        highlighter->configureFormat(Highlighter::Comment, fs.toTextCharFormat(C_COMMENT));
        // Using C_NUMBER for all kinds of numbers.
        highlighter->configureFormat(Highlighter::Decimal, fs.toTextCharFormat(C_NUMBER));
        highlighter->configureFormat(Highlighter::BaseN, fs.toTextCharFormat(C_NUMBER));
        highlighter->configureFormat(Highlighter::Float, fs.toTextCharFormat(C_NUMBER));
        // Using C_STRING for strings and chars.
        highlighter->configureFormat(Highlighter::Char, fs.toTextCharFormat(C_STRING));
        highlighter->configureFormat(Highlighter::String, fs.toTextCharFormat(C_STRING));

        highlighter->rehighlight();
    }
}

void PlainTextEditorWidget::setTabSettings(const TextEditor::TabSettings &ts)
{
    BaseTextEditorWidget::setTabSettings(ts);

    if (baseTextDocument()->syntaxHighlighter()) {
        Highlighter *highlighter =
            static_cast<Highlighter *>(baseTextDocument()->syntaxHighlighter());
        highlighter->setTabSettings(ts);
    }
}

void PlainTextEditorWidget::configure()
{
    Core::MimeType mimeType;
    if (editorDocument())
        mimeType = Core::ICore::mimeDatabase()->findByFile(editorDocument()->fileName());
    configure(mimeType);
}

void PlainTextEditorWidget::configure(const QString &mimeType)
{
    configure(Core::ICore::mimeDatabase()->findByType(mimeType));
}

void PlainTextEditorWidget::configure(const Core::MimeType &mimeType)
{
    Highlighter *highlighter = new Highlighter();
    baseTextDocument()->setSyntaxHighlighter(highlighter);

    setCodeFoldingSupported(false);

    if (!mimeType.isNull()) {
        m_isMissingSyntaxDefinition = true;

        const QString &type = mimeType.type();
        setMimeType(type);

        QString definitionId = Manager::instance()->definitionIdByMimeType(type);
        if (definitionId.isEmpty())
            definitionId = findDefinitionId(mimeType, true);

        if (!definitionId.isEmpty()) {
            m_isMissingSyntaxDefinition = false;
            const QSharedPointer<HighlightDefinition> &definition =
                Manager::instance()->definition(definitionId);
            if (!definition.isNull() && definition->isValid()) {
                highlighter->setDefaultContext(definition->initialContext());

                m_commentDefinition.setAfterWhiteSpaces(definition->isCommentAfterWhiteSpaces());
                m_commentDefinition.setSingleLine(definition->singleLineComment());
                m_commentDefinition.setMultiLineStart(definition->multiLineCommentStart());
                m_commentDefinition.setMultiLineEnd(definition->multiLineCommentEnd());

                setCodeFoldingSupported(true);
            }
        } else if (editorDocument()) {
            const QString &fileName = editorDocument()->fileName();
            if (TextEditorSettings::instance()->highlighterSettings().isIgnoredFilePattern(fileName))
                m_isMissingSyntaxDefinition = false;
        }
    }

    setFontSettings(TextEditorSettings::instance()->fontSettings());

    emit configured(editor());
}

bool PlainTextEditorWidget::isMissingSyntaxDefinition() const
{
    return m_isMissingSyntaxDefinition;
}

bool PlainTextEditorWidget::ignoreMissingSyntaxDefinition() const
{
    return m_ignoreMissingSyntaxDefinition;
}

QString PlainTextEditorWidget::findDefinitionId(const Core::MimeType &mimeType,
                                          bool considerParents) const
{
    QString definitionId = Manager::instance()->definitionIdByAnyMimeType(mimeType.aliases());
    if (definitionId.isEmpty() && considerParents) {
        definitionId = Manager::instance()->definitionIdByAnyMimeType(mimeType.subClassesOf());
        if (definitionId.isEmpty()) {
            foreach (const QString &parent, mimeType.subClassesOf()) {
                const Core::MimeType &parentMimeType =
                    Core::ICore::mimeDatabase()->findByType(parent);
                definitionId = findDefinitionId(parentMimeType, considerParents);
            }
        }
    }
    return definitionId;
}

void PlainTextEditorWidget::acceptMissingSyntaxDefinitionInfo()
{
    Core::ICore::showOptionsDialog(QLatin1String(Constants::TEXT_EDITOR_SETTINGS_CATEGORY),
                                               QLatin1String(Constants::TEXT_EDITOR_HIGHLIGHTER_SETTINGS));
}

void PlainTextEditorWidget::ignoreMissingSyntaxDefinitionInfo()
{
    m_ignoreMissingSyntaxDefinition = true;
}