File indexing completed on 2024-05-12 15:37:53

 /*
  *  This file is part of the KDE libraries
  *  Copyright (C) 2006 Matt Broadstone (mbroadst@gmail.com)
  *  Copyright (C) 2007 Maks Orlovich   (maksim@kde.org)
  *  Copyright ©   2007 Fredrik Höglund <fredrik@kde.org>
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public
  *  License along with this library; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #include "consoledock.h"
 
 #include <QVBoxLayout>
 #include <QPushButton>
 #include <QModelIndex>
 #include <QTextLayout>
 #include <QPainter>
 #include <QLineEdit>
 #include <QListWidget>
 #include "khtml_debug.h"
 #include <QAbstractItemDelegate>
 #include <QTextLayout>
 
 #include <khistorycombobox.h>
 #include <klocalizedstring.h>
 
 namespace KJSDebugger
 {
 
 class ConsoleItemDelegate : public QAbstractItemDelegate
 {
 public:
     enum ItemRole { ResultRole = 0x106EE9CA };
 
     ConsoleItemDelegate(QObject *parent = 0);
     ~ConsoleItemDelegate();
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
 
 private:
     void setLayoutOption(QTextLayout &layout, const QStyleOptionViewItemV3 &option, Qt::Alignment alignment) const;
     QSize layoutText(QTextLayout &layout, const QString &text, const QSize &constraints) const;
     void drawTextLayout(QPainter *painter, const QTextLayout &layout, const QRect &rect) const;
 };
 
 ConsoleItemDelegate::ConsoleItemDelegate(QObject *parent)
     : QAbstractItemDelegate(parent)
 {
 }
 
 ConsoleItemDelegate::~ConsoleItemDelegate()
 {
 }
 
 void ConsoleItemDelegate::setLayoutOption(QTextLayout &layout, const QStyleOptionViewItemV3 &option, Qt::Alignment alignment) const
 {
     QTextOption textoption;
     textoption.setTextDirection(option.direction);
     textoption.setAlignment(QStyle::visualAlignment(option.direction, alignment));
     textoption.setWrapMode(option.features & QStyleOptionViewItemV2::WrapText ? QTextOption::WordWrap
                            : QTextOption::NoWrap);
 
     layout.setTextOption(textoption);
 }
 
 QSize ConsoleItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return QSize();
     }
 
     QFont normalFont = option.font;
     QFont boldFont = normalFont;
     boldFont.setBold(true);
 
     // Extract the items we want to measure
     QString input      = index.data(Qt::DisplayRole).toString();
     QString result     = index.data(ResultRole).toString();
 
     QStyleOptionViewItemV3 opt(option);
     int maxWidth = static_cast<const QListView *>(opt.widget)->viewport()->width();
 
     QTextLayout inputLayout, resultLayout;
     setLayoutOption(inputLayout, opt, Qt::AlignLeft);
     setLayoutOption(resultLayout, opt, Qt::AlignRight);
 
     inputLayout.setFont(normalFont);
     resultLayout.setFont(boldFont);
 
     QSize constraints(maxWidth - 4, 65536);
 
     QSize inputSize  = layoutText(inputLayout, input, constraints);
     QSize resultSize = layoutText(resultLayout, result, constraints);
 
     int width = qBound(0, qMax(inputSize.width(), resultSize.width()) + 4, maxWidth);
     int height = inputSize.height() + option.fontMetrics.leading() + resultSize.height();
 
     return QSize(width, height + 8);
 }
 
 QSize ConsoleItemDelegate::layoutText(QTextLayout &layout, const QString &text, const QSize &constraints) const
 {
     QFontMetrics metrics(layout.font());
     int leading     = metrics.leading();
     int height      = 0;
     int maxWidth    = constraints.width();
     int widthUsed   = 0;
     QTextLine line;
 
     layout.setText(text);
 
     layout.beginLayout();
     while ((line = layout.createLine()).isValid()) {
         height += leading;
 
         line.setLineWidth(maxWidth);
 
         // Make the last line that will fit infinitely long.
         // drawTextLayout() will handle this by fading the line out
         // if it won't fit in the contraints.
         if (height + metrics.height() * 2 + leading >= constraints.height()) {
             line.setLineWidth(INT_MAX);
             line.setLineWidth(line.naturalTextWidth());
         } else {
             line.setLineWidth(maxWidth);
         }
 
         line.setPosition(QPoint(0, height));
 
         height += int(line.height());
         widthUsed = int(qMax(qreal(widthUsed), line.naturalTextWidth()));
     }
     layout.endLayout();
 
     return QSize(widthUsed, height);
 }
 
 void ConsoleItemDelegate::drawTextLayout(QPainter *painter, const QTextLayout &layout, const QRect &rect) const
 {
     if (rect.width() < 1 || rect.height() < 1) {
         return;
     }
 
     QFontMetrics fm(layout.font());
     bool leftAligned = layout.textOption().alignment() & Qt::AlignLeft;
 
     // Draw each line in the layout
     for (int i = 0; i < layout.lineCount(); i++) {
         QTextLine line = layout.lineAt(i);
 
         int width = line.naturalTextWidth();
         int x = width > rect.width() && !leftAligned ? rect.width() - width : 0;
         line.draw(painter, QPoint(x + rect.x(), rect.y()));
     }
 }
 
 void ConsoleItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return;
     }
 
     painter->save();
 
     QFont normalFont = option.font;
     QFont boldFont = normalFont;
     boldFont.setBold(true);
 
     QString input  = index.data(Qt::DisplayRole).toString();
     QString result = index.data(ResultRole).toString();
 
     // Draw the background
     bool selected = option.state & QStyle::State_Selected;
 
     QStyleOptionViewItemV4 opt(option);
 
     QStyle *style = opt.widget->style();
     style->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, opt.widget);
     if (selected) {
         painter->setPen(option.palette.color(QPalette::HighlightedText));
     }
 
     // Draw the text
     QTextLayout inputLayout, resultLayout;
     setLayoutOption(inputLayout, opt, Qt::AlignLeft);
     setLayoutOption(resultLayout, opt, Qt::AlignRight);
 
     inputLayout.setFont(normalFont);
     resultLayout.setFont(boldFont);
 
     QRect contentRect = option.rect.adjusted(2, 4, -2, -4);
 
     QSize inputSize = layoutText(inputLayout, input, contentRect.size());
     QSize resultSize = layoutText(resultLayout, result, QSize(contentRect.width(),
                                   contentRect.height() - inputSize.height() - option.fontMetrics.leading()));
 
     QRect inputRect  = QStyle::alignedRect(option.direction, Qt::AlignLeft | Qt::AlignTop, inputSize, contentRect);
     QRect resultRect = QStyle::alignedRect(option.direction, Qt::AlignRight | Qt::AlignBottom, resultSize, contentRect);
 
     drawTextLayout(painter, inputLayout, inputRect & option.rect);
     drawTextLayout(painter, resultLayout, resultRect & option.rect);
 
     painter->restore();
 }
 
 //------------------------------------------------------------------------
 
 ConsoleDock::ConsoleDock(QWidget *parent)
     : QDockWidget(i18n("Console"), parent)
 {
     setFeatures(DockWidgetMovable | DockWidgetFloatable);
 
     QWidget *mainFrame = new QWidget(this);
 
     consoleView = new QListWidget(mainFrame);
     consoleView->setWordWrap(true);
     consoleView->setItemDelegate(new ConsoleItemDelegate(consoleView));
     consoleView->setAlternatingRowColors(true);
 
     connect(consoleView, SIGNAL(itemClicked(QListWidgetItem*)),
             this, SLOT(slotPasteItem(QListWidgetItem*)));
     connect(consoleView, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
             this, SLOT(slotPasteItem(QListWidgetItem*)));
 
     consoleInput = new KHistoryComboBox(mainFrame);
     consoleInput->setSizePolicy(QSizePolicy::MinimumExpanding,
                                 QSizePolicy::Fixed);
 
     connect(consoleInput, SIGNAL(returnPressed()),
             this, SLOT(slotUserRequestedEval()));
 
     consoleInputButton = new QPushButton(i18n("Enter"), mainFrame);
     connect(consoleInputButton, SIGNAL(clicked(bool)),
             this, SLOT(slotUserRequestedEval()));
 
     QHBoxLayout *bottomLayout = new QHBoxLayout;
     bottomLayout->setSpacing(0);
     bottomLayout->setContentsMargins(0, 0, 0, 0);
     bottomLayout->addWidget(consoleInput);
     bottomLayout->addWidget(consoleInputButton);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->setSpacing(0);
     mainLayout->setContentsMargins(0, 0, 0, 0);
     mainLayout->addWidget(consoleView);
     mainLayout->addLayout(bottomLayout);
     mainFrame->setLayout(mainLayout);
 
     setWidget(mainFrame);
 }
 
 ConsoleDock::~ConsoleDock()
 {
 }
 
 void ConsoleDock::reportResult(const QString &src, const QString &msg)
 {
     QListWidgetItem *item = new QListWidgetItem(src, consoleView);
     item->setData(ConsoleItemDelegate::ResultRole, msg);
     consoleView->scrollToItem(item);
 }
 
 void ConsoleDock::slotPasteItem(QListWidgetItem *item)
 {
     consoleInput->lineEdit()->setText(item->data(Qt::DisplayRole).toString());
 }
 
 void ConsoleDock::slotUserRequestedEval()
 {
     QString src = consoleInput->lineEdit()->text();
     consoleInput->addToHistory(src);
     consoleInput->lineEdit()->clear();
 
     emit requestEval(src);
 }
 
 }
 
 #include "moc_consoledock.cpp"