qt-creator/src/plugins/debugger/memoryagent.cpp

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#include "memoryagent.h"

#include "debuggerengine.h"
#include "debuggercore.h"

#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/editormanager/ieditor.h>
#include <coreplugin/icore.h>

#include <utils/qtcassert.h>

#include <QtGui/QMessageBox>

using namespace Core;

namespace Debugger {
namespace Internal {

///////////////////////////////////////////////////////////////////////
//
// MemoryViewAgent
//
///////////////////////////////////////////////////////////////////////

/*!
    \class MemoryViewAgent

    Objects form this class are created in response to user actions in
    the Gui for showing raw memory from the inferior. After creation
    it handles communication between the engine and the bineditor.
*/

namespace { const int DataRange = 1024 * 1024; }

MemoryViewAgent::MemoryViewAgent(Debugger::DebuggerEngine *engine, quint64 addr)
    : QObject(engine), m_engine(engine)
{
    QTC_ASSERT(engine, /**/);
    createBinEditor(addr);
}

MemoryViewAgent::~MemoryViewAgent()
{
    EditorManager *editorManager = EditorManager::instance();
    QList<IEditor *> editors;
    foreach (QPointer<IEditor> editor, m_editors)
        if (editor)
            editors.append(editor.data());
    editorManager->closeEditors(editors);
}

void MemoryViewAgent::createBinEditor(quint64 addr)
{
    EditorManager *editorManager = EditorManager::instance();
    QString titlePattern = tr("Memory $");
    IEditor *editor = editorManager->openEditorWithContents(
        Core::Constants::K_DEFAULT_BINARY_EDITOR_ID,
        &titlePattern);
    if (editor) {
        connect(editor->widget(),
            SIGNAL(lazyDataRequested(Core::IEditor *, quint64,bool)),
            SLOT(fetchLazyData(Core::IEditor *, quint64,bool)));
        connect(editor->widget(),
            SIGNAL(newWindowRequested(quint64)),
            SLOT(createBinEditor(quint64)));
        connect(editor->widget(),
            SIGNAL(newRangeRequested(Core::IEditor *, quint64)),
            SLOT(provideNewRange(Core::IEditor*,quint64)));
        connect(editor->widget(),
            SIGNAL(startOfFileRequested(Core::IEditor *)),
            SLOT(handleStartOfFileRequested(Core::IEditor*)));
        connect(editor->widget(),
            SIGNAL(endOfFileRequested(Core::IEditor *)),
            SLOT(handleEndOfFileRequested(Core::IEditor*)));
        m_editors << editor;
        editorManager->activateEditor(editor);
        QMetaObject::invokeMethod(editor->widget(), "setNewWindowRequestAllowed");
        QMetaObject::invokeMethod(editor->widget(), "setLazyData",
            Q_ARG(quint64, addr), Q_ARG(int, DataRange), Q_ARG(int, BinBlockSize));
    } else {
        showMessageBox(QMessageBox::Warning,
            tr("No memory viewer available"),
            tr("The memory contents cannot be shown as no viewer plugin "
               "for binary data has been loaded."));
        deleteLater();
    }
}

void MemoryViewAgent::fetchLazyData(IEditor *editor, quint64 block, bool sync)
{
    Q_UNUSED(sync); // FIXME: needed support for incremental searching
    m_engine->fetchMemory(this, editor, BinBlockSize * block, BinBlockSize);
}

void MemoryViewAgent::addLazyData(QObject *editorToken, quint64 addr,
                                  const QByteArray &ba)
{
    IEditor *editor = qobject_cast<IEditor *>(editorToken);
    if (editor && editor->widget()) {
        Core::EditorManager::instance()->activateEditor(editor);
        QMetaObject::invokeMethod(editor->widget(), "addLazyData",
            Q_ARG(quint64, addr / BinBlockSize), Q_ARG(QByteArray, ba));
    }
}

void MemoryViewAgent::provideNewRange(IEditor *editor, quint64 address)
{
    QMetaObject::invokeMethod(editor->widget(), "setLazyData",
        Q_ARG(quint64, address), Q_ARG(int, DataRange),
        Q_ARG(int, BinBlockSize));
}

// Since we are not dealing with files, we take these signals to mean
// "move to start/end of range". This seems to make more sense than
// jumping to the start or end of the address space, respectively.
void MemoryViewAgent::handleStartOfFileRequested(IEditor *editor)
{
    QMetaObject::invokeMethod(editor->widget(),
        "setCursorPosition", Q_ARG(int, 0));
}

void MemoryViewAgent::handleEndOfFileRequested(IEditor *editor)
{
    QMetaObject::invokeMethod(editor->widget(),
        "setCursorPosition", Q_ARG(int, DataRange - 1));
}

} // namespace Internal
} // namespace Debugger