1 files changed, 276 insertions, 0 deletions
diff --git a/tools/qmldebugger/standalone/expressionquerywidget.cpp b/tools/qmldebugger/standalone/expressionquerywidget.cpp
new file mode 100644
index 0000000..cd59871
--- /dev/null
+++ b/tools/qmldebugger/standalone/expressionquerywidget.cpp
@@ -0,0 +1,276 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt QML Debugger of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** 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
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtCore/qdebug.h>
+
+#include <QtGui/qlabel.h>
+#include <QtGui/qtextedit.h>
+#include <QtGui/qlineedit.h>
+#include <QtGui/qpushbutton.h>
+#include <QtGui/qevent.h>
+#include <QtGui/qgroupbox.h>
+#include <QtGui/qtextobject.h>
+#include <QtGui/qlayout.h>
+
+#include "expressionquerywidget.h"
+
+ExpressionQueryWidget::ExpressionQueryWidget(Mode mode, QmlEngineDebug *client, QWidget *parent)
+    : QWidget(parent),
+      m_mode(mode),
+      m_client(client),
+      m_query(0),
+      m_textEdit(new QTextEdit),
+      m_lineEdit(0)
+{
+    m_prompt = QLatin1String(">> ");
+
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->setMargin(0);
+    layout->setSpacing(0);
+    layout->addWidget(m_textEdit);
+
+    updateTitle();
+
+    if (m_mode == SeparateEntryMode) {
+        m_lineEdit = new QLineEdit;
+        connect(m_lineEdit, SIGNAL(returnPressed()), SLOT(executeExpression()));
+        QHBoxLayout *hbox = new QHBoxLayout;
+        hbox->setMargin(5);
+        hbox->setSpacing(5);
+        hbox->addWidget(new QLabel(tr("Expression:")));
+        hbox->addWidget(m_lineEdit);
+        layout->addLayout(hbox);
+
+        m_textEdit->setReadOnly(true);
+        m_lineEdit->installEventFilter(this);
+    } else {
+        m_textEdit->installEventFilter(this);
+        appendPrompt();
+    }
+}
+
+void ExpressionQueryWidget::setEngineDebug(QmlEngineDebug *client)
+{
+    m_client = client;
+}
+
+void ExpressionQueryWidget::clear()
+{
+    m_textEdit->clear();
+    if (m_lineEdit)
+        m_lineEdit->clear();
+    if (m_mode == ShellMode)
+        appendPrompt();
+}
+
+void ExpressionQueryWidget::updateTitle()
+{
+    if (m_currObject.debugId() < 0) {
+        m_title = tr("Expression queries");
+    } else {
+        QString desc = QLatin1String("<")
+            + m_currObject.className() + QLatin1String(": ")
+            + (m_currObject.name().isEmpty() ? QLatin1String("<unnamed>") : m_currObject.name())
+            + QLatin1String(">");
+        m_title = tr("Expression queries (using context for %1)" , "Selected object").arg(desc);
+    }
+}
+
+void ExpressionQueryWidget::appendPrompt()
+{
+    m_textEdit->moveCursor(QTextCursor::End);
+
+    if (m_mode == SeparateEntryMode) {
+        m_textEdit->insertPlainText("\n");
+    } else {
+        m_textEdit->setTextColor(Qt::gray);
+        m_textEdit->append(m_prompt);
+    }
+}
+
+void ExpressionQueryWidget::setCurrentObject(const QmlDebugObjectReference &obj)
+{
+    m_currObject = obj;
+    updateTitle();
+}
+
+void ExpressionQueryWidget::checkCurrentContext()
+{
+    m_textEdit->moveCursor(QTextCursor::End);
+
+    if (m_currObject.debugId() != -1 && m_currObject.debugId() != m_objectAtLastFocus.debugId())
+        showCurrentContext();
+    m_objectAtLastFocus = m_currObject;
+}
+
+void ExpressionQueryWidget::showCurrentContext()
+{
+    if (m_mode == ShellMode) {
+        // clear the initial prompt
+        if (m_textEdit->document()->lineCount() == 1)
+            m_textEdit->clear();
+    }
+
+    m_textEdit->moveCursor(QTextCursor::End);
+    m_textEdit->setTextColor(Qt::darkGreen);
+    m_textEdit->append(m_currObject.className()
+            + QLatin1String(": ")
+            + (m_currObject.name().isEmpty() ? QLatin1String("<unnamed object>") : m_currObject.name()));
+    appendPrompt();
+}
+
+void ExpressionQueryWidget::executeExpression()
+{
+    if (!m_client)
+        return;
+        
+    if (m_mode == SeparateEntryMode)
+        m_expr = m_lineEdit->text().trimmed();
+    else
+        m_expr = m_expr.trimmed();
+
+    if (!m_expr.isEmpty() && m_currObject.debugId() != -1) {
+        if (m_query)
+            delete m_query;
+        m_query = m_client->queryExpressionResult(m_currObject.debugId(), m_expr, this);
+        if (!m_query->isWaiting())
+            showResult();
+        else
+            QObject::connect(m_query, SIGNAL(stateChanged(QmlDebugQuery::State)),
+                            this, SLOT(showResult()));
+
+        m_lastExpr = m_expr;
+        if (m_lineEdit)
+            m_lineEdit->clear();
+    }
+}
+
+void ExpressionQueryWidget::showResult()
+{
+    if (m_query) {
+        m_textEdit->moveCursor(QTextCursor::End);
+        QVariant value = m_query->result();
+        QString result;
+        
+        if (value.type() == QVariant::List || value.type() == QVariant::StringList) {
+            result = tr("<%1 items>", "%1 = number of items").arg(value.toList().count());
+        } else if (value.isNull()) {
+            result = QLatin1String("<no value>");
+        } else {
+            result = value.toString();
+        }
+
+        if (m_mode == SeparateEntryMode) {
+            m_textEdit->setTextColor(Qt::black);
+            m_textEdit->setFontWeight(QFont::Bold);
+            m_textEdit->insertPlainText(m_expr + " : ");
+            m_textEdit->setFontWeight(QFont::Normal);
+            m_textEdit->insertPlainText(result);
+        } else {
+            m_textEdit->setTextColor(Qt::darkGreen);
+            m_textEdit->insertPlainText(" => ");
+            m_textEdit->setTextColor(Qt::black);
+            m_textEdit->insertPlainText(result);
+        }
+        appendPrompt();
+        m_expr.clear();
+    }
+}
+
+bool ExpressionQueryWidget::eventFilter(QObject *obj, QEvent *event)
+{
+    if (obj == m_textEdit) {
+        switch (event->type()) {
+            case QEvent::KeyPress:
+            {
+                QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
+                int key = keyEvent->key();
+                if (key == Qt::Key_Return || key == Qt::Key_Enter) {
+                    executeExpression();
+                    return true;
+                } else if (key == Qt::Key_Backspace) {
+                    // ensure m_expr doesn't contain backspace characters
+                    QTextCursor cursor = m_textEdit->textCursor();
+                    bool atLastLine = !(cursor.block().next().isValid());
+                    if (!atLastLine)
+                        return true;
+                    if (cursor.columnNumber() <= m_prompt.count())
+                        return true;
+                    cursor.deletePreviousChar();
+                    m_expr = cursor.block().text().mid(m_prompt.count());
+                    return true;
+                } else {
+                    m_textEdit->moveCursor(QTextCursor::End);
+                    m_textEdit->setTextColor(Qt::black);
+                    m_expr += keyEvent->text();
+                }
+                break;
+            }
+            case QEvent::FocusIn:
+                checkCurrentContext();
+                m_textEdit->moveCursor(QTextCursor::End);
+                break;
+            default:
+                break;
+        }
+    } else if (obj == m_lineEdit) {
+        switch (event->type()) {
+            case QEvent::KeyPress:
+            {
+                QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
+                int key = keyEvent->key();
+                if (key == Qt::Key_Up && m_lineEdit->text() != m_lastExpr) {
+                    m_expr = m_lineEdit->text();
+                    if (!m_lastExpr.isEmpty())
+                        m_lineEdit->setText(m_lastExpr);
+                } else if (key == Qt::Key_Down) {
+                    m_lineEdit->setText(m_expr);
+                }
+                break;
+            }
+            case QEvent::FocusIn:
+                checkCurrentContext();
+                break;
+            default:
+                break;
+        }
+    }
+    return QWidget::eventFilter(obj, event);
+}