/*
 * Copyright Johannes Sixt
 * This file is licensed under the GNU General Public License Version 2.
 * See the file COPYING in the toplevel directory of the source directory.
 */

#include "memwindow.h"
#include <ntqheader.h>
#include <tdelocale.h>
#include <tdeconfigbase.h>
#include "debugger.h"


class MemoryViewItem : public TQListViewItem
{
public:
    MemoryViewItem(TQListView* parent, TQListViewItem* insertAfter, TQString raw, TQString cooked)
        : TQListViewItem(parent, insertAfter, raw, cooked) {}

    void setChanged(uint pos, bool b) { m_changed[pos] = b; }

protected:
    virtual void paintCell(TQPainter* p, const TQColorGroup& cg,
			   int column, int width, int alignment);

    bool m_changed[8];
};

void MemoryViewItem::paintCell(TQPainter* p, const TQColorGroup& cg,
			       int column, int width, int alignment)
{
    if( column > 0 && m_changed[column - 1] ) {
	TQColorGroup newcg = cg;
	newcg.setColor(TQColorGroup::Text, red);
	TQListViewItem::paintCell(p, newcg, column, width, alignment);
    } else {
	TQListViewItem::paintCell(p, cg, column, width, alignment);
    }
}


MemoryWindow::MemoryWindow(TQWidget* parent, const char* name) :
	TQWidget(parent, name),
	m_debugger(0),
	m_expression(true, this, "expression"),
	m_memory(this, "memory"),
	m_layout(this, 0, 2),
	m_format(MDTword | MDThex)
{
    TQSize minSize = m_expression.sizeHint();
    m_expression.setMinimumSize(minSize);
    m_expression.setInsertionPolicy(TQComboBox::NoInsertion);
    m_expression.setMaxCount(15);

    m_memory.addColumn(i18n("Address"), 80);

    m_memory.setSorting(-1);		/* don't sort */
    m_memory.setAllColumnsShowFocus(true);
    m_memory.header()->setClickEnabled(false);

    // create layout
    m_layout.addWidget(&m_expression, 0);
    m_layout.addWidget(&m_memory, 10);
    m_layout.activate();

    connect(&m_expression, SIGNAL(activated(const TQString&)),
	    this, SLOT(slotNewExpression(const TQString&)));

    // the popup menu
    m_popup.insertItem(i18n("B&ytes"), MDTbyte);
    m_popup.insertItem(i18n("Halfwords (&2 Bytes)"), MDThalfword);
    m_popup.insertItem(i18n("Words (&4 Bytes)"), MDTword);
    m_popup.insertItem(i18n("Giantwords (&8 Bytes)"), MDTgiantword);
    m_popup.insertSeparator();
    m_popup.insertItem(i18n("He&xadecimal"), MDThex);
    m_popup.insertItem(i18n("Signed &decimal"), MDTsigned);
    m_popup.insertItem(i18n("&Unsigned decimal"), MDTunsigned);
    m_popup.insertItem(i18n("&Octal"), MDToctal);
    m_popup.insertItem(i18n("&Binary"), MDTbinary);
    m_popup.insertItem(i18n("&Addresses"), MDTaddress);
    m_popup.insertItem(i18n("&Character"), MDTchar);
    m_popup.insertItem(i18n("&Floatingpoint"), MDTfloat);
    m_popup.insertItem(i18n("&Strings"), MDTstring);
    m_popup.insertItem(i18n("&Instructions"), MDTinsn);
    connect(&m_popup, SIGNAL(activated(int)), this, SLOT(slotTypeChange(int)));

    /*
     * Handle right mouse button. Signal righteButtonClicked cannot be
     * used, because it works only over items, not over the blank window.
     */
    m_memory.viewport()->installEventFilter(this);
}

MemoryWindow::~MemoryWindow()
{
}

bool MemoryWindow::eventFilter(TQObject*, TQEvent* ev)
{
    if (ev->type() == TQEvent::MouseButtonRelease) {
	handlePopup(static_cast<TQMouseEvent*>(ev));
	return true;
    }
    return false;
}

void MemoryWindow::handlePopup(TQMouseEvent* ev)
{
    if (ev->button() == RightButton)
    {
	// show popup menu
	if (m_popup.isVisible())
	{
	    m_popup.hide();
	}
	else
	{
	    m_popup.popup(mapToGlobal(ev->pos()));
	}
	return;
    }
}

void MemoryWindow::slotNewExpression(const TQString& newText)
{
    TQString text = newText.simplifyWhiteSpace();

    // see if the string is in the list
    // (note: must count downwards because of removeItem!)
    for (int i = m_expression.count()-1; i >= 0; i--)
    {
	if (m_expression.text(i) == text) {
	    // yes it is!
	    // look up the format that was used last time for this expr
	    TQMap<TQString,unsigned>::iterator pFormat = m_formatCache.find(text);
	    if (pFormat != m_formatCache.end()) {
		m_format = *pFormat;
		m_debugger->setMemoryFormat(m_format);
	    }
	    // remove this text, will be inserted at the top
	    m_expression.removeItem(i);
	}
    }
    m_expression.insertItem(text, 0);

    if (!text.isEmpty()) {
	m_formatCache[text] = m_format;
    }

    displayNewExpression(text);
}

void MemoryWindow::displayNewExpression(const TQString& expr)
{
    m_debugger->setMemoryExpression(expr);
    m_expression.setEditText(expr);

    // clear memory dump if no dump wanted
    if (expr.isEmpty()) {
	m_memory.clear();
	m_old_memory.clear();
    }
}

void MemoryWindow::slotTypeChange(int id)
{
    m_old_memory.clear();

    // compute new type
    if (id & MDTsizemask)
	m_format = (m_format & ~MDTsizemask) | id;
    if (id & MDTformatmask)
	m_format = (m_format & ~MDTformatmask) | id;
    m_debugger->setMemoryFormat(m_format);

    // change the format in the cache
    TQString expr = m_expression.currentText();
    m_formatCache[expr.simplifyWhiteSpace()] = m_format;

    // force redisplay
    displayNewExpression(expr);
}

void MemoryWindow::slotNewMemoryDump(const TQString& msg, const std::list<MemoryDump>& memdump)
{
    m_memory.clear();
    if (!msg.isEmpty()) {
	new TQListViewItem(&m_memory, TQString(), msg);
	return;
    }

    MemoryViewItem* after = 0;
    std::list<MemoryDump>::const_iterator md = memdump.begin();

    // remove all columns, except the address column
    for(int k = m_memory.columns() - 1; k > 0; k--)
	m_memory.removeColumn(k);

    //add the needed columns
    TQStringList sl = TQStringList::split( "\t", md->dump );
    for (uint i = 0; i < sl.count(); i++)
	m_memory.addColumn("", -1);

    TQMap<TQString,TQString> tmpMap;

    for (; md != memdump.end(); ++md)
    {
	TQString addr = md->address.asString() + " " + md->address.fnoffs;
	TQStringList sl = TQStringList::split( "\t", md->dump );

	// save memory
	tmpMap[addr] = md->dump;

	after = new MemoryViewItem(&m_memory, after, addr, "");

	TQStringList tmplist;
	TQMap<TQString,TQString>::Iterator pos = m_old_memory.find( addr );

	if( pos != m_old_memory.end() )
	    tmplist = TQStringList::split( "\t", pos.data() );

	for (uint i = 0; i < sl.count(); i++)
	{
            after->setText( i+1, *sl.at(i) );

	    bool changed =
		tmplist.count() > 0 &&
		*sl.at(i) != *tmplist.at(i);
	    after->setChanged(i, changed);
	}
    }

    m_old_memory.clear();
    m_old_memory = tmpMap;
}

static const char MemoryGroup[] = "Memory";
static const char NumExprs[] = "NumExprs";
static const char ExpressionFmt[] = "Expression%d";
static const char FormatFmt[] = "Format%d";
static const char ColumnWidths[] = "ColumnWidths";

void MemoryWindow::saveProgramSpecific(TDEConfigBase* config)
{
    TDEConfigGroupSaver s(config, MemoryGroup);

    int numEntries = m_expression.count();
    config->writeEntry(NumExprs, numEntries);
    TQString exprEntry;
    TQString fmtEntry;
    for (int i = 0; i < numEntries;) {
	TQString text = m_expression.text(i);
	i++;				/* entries are counted 1-based */
	exprEntry.sprintf(ExpressionFmt, i);
	fmtEntry.sprintf(FormatFmt, i);
	config->writeEntry(exprEntry, text);
	TQMap<TQString,unsigned>::iterator pFormat = m_formatCache.find(text);
	unsigned fmt = pFormat != m_formatCache.end()  ?  *pFormat  :  MDTword | MDThex;
	config->writeEntry(fmtEntry, fmt);
    }

    // column widths
    TQStrList widths;
    TQString wStr;
    for (int i = 0; i < 2; i++) {
	int w = m_memory.columnWidth(i);
	wStr.setNum(w);
	widths.append(wStr);
    }
    config->writeEntry(ColumnWidths, widths);
}

void MemoryWindow::restoreProgramSpecific(TDEConfigBase* config)
{
    TDEConfigGroupSaver s(config, MemoryGroup);

    int numEntries = config->readNumEntry(NumExprs, 0);
    m_expression.clear();

    TQString exprEntry;
    TQString fmtEntry;
    // entries are counted 1-based
    for (int i = 1; i <= numEntries; i++) {
	exprEntry.sprintf(ExpressionFmt, i);
	fmtEntry.sprintf(FormatFmt, i);
	TQString expr = config->readEntry(exprEntry);
	unsigned fmt = config->readNumEntry(fmtEntry, MDTword | MDThex);
	m_expression.insertItem(expr);
	m_formatCache[expr] = fmt & (MDTsizemask | MDTformatmask);
    }

    // initialize with top expression
    if (numEntries > 0) {
	m_expression.setCurrentItem(0);
	TQString expr = m_expression.text(0);
	m_format = m_formatCache[expr];
	m_debugger->setMemoryFormat(m_format);
	displayNewExpression(expr);
    }

    // column widths
    TQStrList widths;
    int n = config->readListEntry(ColumnWidths, widths);
    if (n > 2)
	n = 2;
    for (int i = 0; i < n; i++) {
	TQString wStr = widths.at(i);
	bool ok;
	int w = wStr.toInt(&ok);
	if (ok)
	    m_memory.setColumnWidth(i, w);
    }
}


#include "memwindow.moc"