/****************************************************************************

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtSCriptTools module of the Qt Toolkit.

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** No Commercial Usage

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** $QT_END_LICENSE$

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****************************************************************************/

#include "qscriptdebuggercodeview_p.h"

#include "qscriptdebuggercodeviewinterface_p_p.h"

#include "qscriptedit_p.h"

#include <QtGui/qboxlayout.h>

#include <QtGui/qtextobject.h>

#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

class QScriptDebuggerCodeViewPrivate

    : public QScriptDebuggerCodeViewInterfacePrivate

{

    Q_DECLARE_PUBLIC(QScriptDebuggerCodeView)

public:

    QScriptDebuggerCodeViewPrivate();

    ~QScriptDebuggerCodeViewPrivate();

    QScriptEdit *editor;

};

QScriptDebuggerCodeViewPrivate::QScriptDebuggerCodeViewPrivate()

{

}

QScriptDebuggerCodeViewPrivate::~QScriptDebuggerCodeViewPrivate()

{

}

QScriptDebuggerCodeView::QScriptDebuggerCodeView(QWidget *parent)

    : QScriptDebuggerCodeViewInterface(*new QScriptDebuggerCodeViewPrivate, parent, 0)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor = new QScriptEdit();

    d->editor->setReadOnly(true);

    d->editor->setBackgroundVisible(false);

    QObject::connect(d->editor, SIGNAL(breakpointToggleRequest(int,bool)),

                     this, SIGNAL(breakpointToggleRequest(int,bool)));

    QObject::connect(d->editor, SIGNAL(breakpointEnableRequest(int,bool)),

                     this, SIGNAL(breakpointEnableRequest(int,bool)));

    QVBoxLayout *vbox = new QVBoxLayout(this);

    vbox->setMargin(0);

    vbox->addWidget(d->editor);

}

QScriptDebuggerCodeView::~QScriptDebuggerCodeView()

{

}

QString QScriptDebuggerCodeView::text() const

{

    Q_D(const QScriptDebuggerCodeView);

    return d->editor->toPlainText();

}

void QScriptDebuggerCodeView::setText(const QString &text)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setPlainText(text);

}

int QScriptDebuggerCodeView::cursorLineNumber() const

{

    Q_D(const QScriptDebuggerCodeView);

    return d->editor->currentLineNumber();

}

void QScriptDebuggerCodeView::gotoLine(int lineNumber)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->gotoLine(lineNumber);

}

int QScriptDebuggerCodeView::find(const QString &exp, int options)

{

    Q_D(QScriptDebuggerCodeView);

    QPlainTextEdit *ed = (QPlainTextEdit*)d->editor;

    QTextCursor cursor = ed->textCursor();

    if (options & 0x100) {

        // start searching from the beginning of selection

        if (cursor.hasSelection()) {

            int len = cursor.selectedText().length();

            cursor.clearSelection();

            cursor.setPosition(cursor.position() - len);

            ed->setTextCursor(cursor);

        }

        options &= ~0x100;

    }

    int ret = 0;

    if (ed->find(exp, QTextDocument::FindFlags(options))) {

        ret |= 0x1;

    } else {

        QTextCursor curse = cursor;

        curse.movePosition(QTextCursor::Start);

        ed->setTextCursor(curse);

        if (ed->find(exp, QTextDocument::FindFlags(options)))

            ret |= 0x1 | 0x2;

        else

            ed->setTextCursor(cursor);

    }

    return ret;

}

void QScriptDebuggerCodeView::setExecutionLineNumber(int lineNumber, bool error)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setExecutionLineNumber(lineNumber, error);

}

void QScriptDebuggerCodeView::setExecutableLineNumbers(const QSet<int> &lineNumbers)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setExecutableLineNumbers(lineNumbers);

}

int QScriptDebuggerCodeView::baseLineNumber() const

{

    Q_D(const QScriptDebuggerCodeView);

    return d->editor->baseLineNumber();

}

void QScriptDebuggerCodeView::setBaseLineNumber(int lineNumber)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setBaseLineNumber(lineNumber);

}

void QScriptDebuggerCodeView::setBreakpoint(int lineNumber)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setBreakpoint(lineNumber);

}

void QScriptDebuggerCodeView::deleteBreakpoint(int lineNumber)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->deleteBreakpoint(lineNumber);

}

void QScriptDebuggerCodeView::setBreakpointEnabled(int lineNumber, bool enable)

{

    Q_D(QScriptDebuggerCodeView);

    d->editor->setBreakpointEnabled(lineNumber, enable);

}

namespace {

static bool isIdentChar(const QChar &ch)

{

    static QChar underscore = QLatin1Char('_');

    return ch.isLetter() || (ch == underscore);

}

} // namespace

/*!

  \reimp

*/

bool QScriptDebuggerCodeView::event(QEvent *e)

{

    Q_D(QScriptDebuggerCodeView);

    if (e->type() == QEvent::ToolTip) {

        if (d->editor->executionLineNumber() == -1)

            return false;

        QHelpEvent *he = static_cast<QHelpEvent*>(e);

        QPoint pt = he->pos();

        pt.rx() -= d->editor->extraAreaWidth();

        pt.ry() -= 8;

        QTextCursor cursor = d->editor->cursorForPosition(pt);

        QTextBlock block = cursor.block();

        QString contents = block.text();

        if (contents.isEmpty())

            return false;

        int linePosition = cursor.position() - block.position();

        if (linePosition < 0)

            linePosition = 0;

        // ### generalize -- same as in completiontask

        int pos = linePosition;

        if ((pos > 0) && contents.at(pos-1).isNumber()) {

            // tooltips for numbers is pointless

            return false;

        }

        while ((pos > 0) && isIdentChar(contents.at(pos-1)))

            --pos;

        if ((pos > 0) && ((contents.at(pos-1) == QLatin1Char('\''))

                          || (contents.at(pos-1) == QLatin1Char('\"')))) {

            // ignore string literals

            return false;

        }

        int pos2 = linePosition - 1;

        while ((pos2 < contents.size()-1) && isIdentChar(contents.at(pos2+1)))

            ++pos2;

        QString ident = contents.mid(pos, pos2 - pos + 1);

        QStringList path;

        path.append(ident);

        while ((pos > 0) && (contents.at(pos-1) == QLatin1Char('.'))) {

            --pos;

            pos2 = pos;

            while ((pos > 0) && isIdentChar(contents.at(pos-1)))

                --pos;

            path.prepend(contents.mid(pos, pos2 - pos));

        }

        if (!path.isEmpty()) {

            int lineNumber = cursor.blockNumber() + d->editor->baseLineNumber();

            emit toolTipRequest(he->globalPos(), lineNumber, path);

        }

    }

    return false;

}

QT_END_NAMESPACE

#include "moc_qscriptdebuggercodeview_p.cpp"