[AutoScroll] Added AutoScroll plugin

I'm still looking for some icon. For now, only red square is shown.

src/plugins/AutoScroll/AutoScroll.pro

@@ -0,0 +1,15 @@
+TARGET = $$qtLibraryTarget(AutoScroll)
+# OS/2 allows only 8 chars in TARGET
+os2: TARGET = AutoScrl
+
+SOURCES += autoscrollplugin.cpp \
+    autoscroller.cpp \
+    framescroller.cpp
+
+HEADERS += autoscrollplugin.h \
+    autoscroller.h \
+    framescroller.h
+
+RESOURCES += autoscroll.qrc
+
+include(../../plugins.pri)

src/plugins/AutoScroll/autoscroll.qrc

@@ -0,0 +1,4 @@
+<RCC>
+    <qresource prefix="/autoscroll">
+    </qresource>
+</RCC>

src/plugins/AutoScroll/autoscroller.cpp

@@ -0,0 +1,179 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#include "autoscroller.h"
+#include "framescroller.h"
+#include "webview.h"
+#include "webpage.h"
+
+#include <QMouseEvent>
+#include <QWebFrame>
+#include <QLabel>
+#include <QDebug>
+
+AutoScroller::AutoScroller(const QString &settings, QObject* parent)
+    : QObject(parent)
+    , m_view(0)
+{
+    Q_UNUSED(settings)
+
+    m_indicator = new QLabel;
+    m_indicator->resize(30, 30);
+    m_indicator->setStyleSheet("QLabel{background-color: red;}");
+    m_indicator->installEventFilter(this);
+
+    m_frameScroller = new FrameScroller(this);
+}
+
+bool AutoScroller::mouseMove(QObject* obj, QMouseEvent* event)
+{
+    Q_UNUSED(obj)
+
+    if (m_indicator->isVisible()) {
+        QRect rect = indicatorGlobalRect();
+        int xlength = 0;
+        int ylength = 0;
+
+        if (rect.left() > event->globalPos().x()) {
+            xlength = event->globalPos().x() - rect.left();
+        }
+        else if (rect.right() < event->globalPos().x()) {
+            xlength = event->globalPos().x() - rect.right();
+        }
+        if (rect.top() > event->globalPos().y()) {
+            ylength = event->globalPos().y() - rect.top();
+        }
+        else if (rect.bottom() < event->globalPos().y()) {
+            ylength = event->globalPos().y() - rect.bottom();
+        }
+
+        m_frameScroller->startScrolling(xlength, ylength);
+    }
+
+    return false;
+}
+
+bool AutoScroller::mousePress(QObject* obj, QMouseEvent* event)
+{
+    bool middleButton = event->buttons() == Qt::MiddleButton;
+    WebView* view = qobject_cast<WebView*>(obj);
+    Q_ASSERT(view);
+
+    // Start?
+    if (m_view != view && middleButton) {
+        return showIndicator(view, event->pos());
+    }
+    else if (!m_indicator->isVisible() && middleButton) {
+        return showIndicator(view, event->pos());
+    }
+
+    // Stop
+    if (m_indicator->isVisible()) {
+        stopScrolling();
+        return true;
+    }
+
+    return false;
+}
+
+bool AutoScroller::mouseRelease(QObject* obj, QMouseEvent* event)
+{
+    Q_UNUSED(obj)
+
+    if (m_indicator->isVisible()) {
+        if (!indicatorGlobalRect().contains(event->globalPos())) {
+            stopScrolling();
+        }
+        return true;
+    }
+
+    return false;
+}
+
+bool AutoScroller::eventFilter(QObject* obj, QEvent* event)
+{
+    if (obj == m_indicator) {
+        switch (event->type()) {
+        case QEvent::Enter:
+            m_frameScroller->stopScrolling();
+            break;
+
+        case QEvent::Wheel:
+        case QEvent::Hide:
+        case QEvent::MouseButtonPress:
+            stopScrolling();
+            break;
+
+        default:
+            break;
+        }
+    }
+
+    return false;
+}
+
+bool AutoScroller::showIndicator(WebView* view, const QPoint &pos)
+{
+    QWebFrame* frame = view->page()->frameAt(pos);
+
+    if (!frame) {
+        return false;
+    }
+
+    const QWebHitTestResult res = frame->hitTestContent(pos);
+
+    if (res.isContentEditable() || !res.linkUrl().isEmpty()) {
+        return false;
+    }
+
+    bool vertical = frame->scrollBarGeometry(Qt::Vertical).isValid();
+    bool horizontal = frame->scrollBarGeometry(Qt::Horizontal).isValid();
+
+    if (!vertical && !horizontal) {
+        return false;
+    }
+
+    m_view = view;
+
+    QPoint p;
+    p.setX(pos.x() - m_indicator->width() / 2);
+    p.setY(pos.y() - m_indicator->height() / 2);
+
+    m_indicator->setParent(view->parentWidget());
+    m_indicator->move(p);
+    m_indicator->show();
+
+    m_frameScroller->setFrame(frame);
+
+    m_view->grabMouse();
+    return true;
+}
+
+void AutoScroller::stopScrolling()
+{
+    m_view->releaseMouse();
+
+    m_indicator->hide();
+    m_indicator->setParent(0);
+    m_frameScroller->stopScrolling();
+}
+
+QRect AutoScroller::indicatorGlobalRect() const
+{
+    QPoint pos = m_indicator->parentWidget()->mapToGlobal(m_indicator->geometry().topLeft());
+    return QRect(pos.x(), pos.y(), m_indicator->width(), m_indicator->height());
+}

src/plugins/AutoScroll/autoscroller.h

@@ -0,0 +1,54 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#ifndef AUTOSCROLLER_H
+#define AUTOSCROLLER_H
+
+#include <QObject>
+#include <QPoint>
+
+class QMouseEvent;
+class QLabel;
+class QRect;
+
+class WebView;
+class FrameScroller;
+
+class AutoScroller : public QObject
+{
+    Q_OBJECT
+public:
+    explicit AutoScroller(const QString &settings, QObject* parent = 0);
+
+    bool mouseMove(QObject* obj, QMouseEvent* event);
+    bool mousePress(QObject* obj, QMouseEvent* event);
+    bool mouseRelease(QObject* obj, QMouseEvent* event);
+
+private:
+    bool eventFilter(QObject* obj, QEvent* event);
+
+    bool showIndicator(WebView* view, const QPoint &pos);
+    void stopScrolling();
+
+    QRect indicatorGlobalRect() const;
+
+    WebView* m_view;
+    QLabel* m_indicator;
+    FrameScroller* m_frameScroller;
+};
+
+#endif // AUTOSCROLLER_H

src/plugins/AutoScroll/autoscrollplugin.cpp

@@ -0,0 +1,103 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#include "autoscrollplugin.h"
+#include "autoscroller.h"
+#include "qupzilla.h"
+#include "pluginproxy.h"
+#include "mainapplication.h"
+
+#include <QTranslator>
+
+AutoScrollPlugin::AutoScrollPlugin()
+    : QObject()
+    , m_scroller(0)
+{
+}
+
+PluginSpec AutoScrollPlugin::pluginSpec()
+{
+    PluginSpec spec;
+    spec.name = "AutoScroll";
+    spec.info = "AutoScroll plugin";
+    spec.description = "Provides support for autoscroll with middle mouse button";
+    spec.version = "0.1.0";
+    spec.author = "David Rosca <nowrep@gmail.com>";
+    spec.icon = QPixmap(":/autoscroll/data/icon.png");
+    spec.hasSettings = false;
+
+    return spec;
+}
+
+void AutoScrollPlugin::init(InitState state, const QString &settingsPath)
+{
+    Q_UNUSED(state)
+
+    m_scroller = new AutoScroller(settingsPath, this);
+
+    QZ_REGISTER_EVENT_HANDLER(PluginProxy::MouseMoveHandler);
+    QZ_REGISTER_EVENT_HANDLER(PluginProxy::MousePressHandler);
+    QZ_REGISTER_EVENT_HANDLER(PluginProxy::MouseReleaseHandler);
+}
+
+void AutoScrollPlugin::unload()
+{
+    m_scroller->deleteLater();
+}
+
+bool AutoScrollPlugin::testPlugin()
+{
+    return (QupZilla::VERSION == QLatin1String("1.7.0"));
+}
+
+QTranslator* AutoScrollPlugin::getTranslator(const QString &locale)
+{
+    QTranslator* translator = new QTranslator(this);
+    translator->load(locale, ":/autoscroll/locale/");
+    return translator;
+}
+
+bool AutoScrollPlugin::mouseMove(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event)
+{
+    if (type == Qz::ON_WebView) {
+        return m_scroller->mouseMove(obj, event);
+    }
+
+    return false;
+}
+
+bool AutoScrollPlugin::mousePress(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event)
+{
+    if (type == Qz::ON_WebView) {
+        return m_scroller->mousePress(obj, event);
+    }
+
+    return false;
+}
+
+bool AutoScrollPlugin::mouseRelease(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event)
+{
+    if (type == Qz::ON_WebView) {
+        return m_scroller->mouseRelease(obj, event);
+    }
+
+    return false;
+}
+
+#if QT_VERSION < 0x050000
+Q_EXPORT_PLUGIN2(AutoScroll, AutoScrollPlugin)
+#endif

src/plugins/AutoScroll/autoscrollplugin.h

@@ -0,0 +1,52 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#ifndef AUTOSCROLLPLUGIN_H
+#define AUTOSCROLLPLUGIN_H
+
+#include "plugininterface.h"
+
+class AutoScroller;
+
+class AutoScrollPlugin : public QObject, public PluginInterface
+{
+    Q_OBJECT
+    Q_INTERFACES(PluginInterface)
+
+#if QT_VERSION >= 0x050000
+    Q_PLUGIN_METADATA(IID "QupZilla.Browser.plugin.TestPlugin")
+#endif
+
+public:
+    explicit AutoScrollPlugin();
+    PluginSpec pluginSpec();
+
+    void init(InitState state, const QString &settingsPath);
+    void unload();
+    bool testPlugin();
+
+    QTranslator* getTranslator(const QString &locale);
+
+    bool mouseMove(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event);
+    bool mousePress(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event);
+    bool mouseRelease(const Qz::ObjectName &type, QObject* obj, QMouseEvent* event);
+
+private:
+    AutoScroller* m_scroller;
+};
+
+#endif // TESTPLUGIN_H

src/plugins/AutoScroll/framescroller.cpp

@@ -0,0 +1,63 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#include "framescroller.h"
+
+#include <QTimer>
+#include <QWebFrame>
+#include <QtCore/qmath.h>
+
+FrameScroller::FrameScroller(QObject* parent)
+    : QObject(parent)
+    , m_frame(0)
+    , m_lengthX(0)
+    , m_lengthY(0)
+{
+    m_timer = new QTimer(this);
+    m_timer->setInterval(20);
+    connect(m_timer, SIGNAL(timeout()), this, SLOT(scrollStep()));
+}
+
+void FrameScroller::setFrame(QWebFrame* frame)
+{
+    m_frame = frame;
+}
+
+void FrameScroller::startScrolling(int lengthX, int lengthY)
+{
+    Q_ASSERT(m_frame);
+
+    m_lengthX = lengthX;
+    m_lengthY = lengthY;
+
+    if (m_lengthX == 0 && m_lengthY == 0) {
+        m_timer->stop();
+    }
+    else if (!m_timer->isActive()) {
+        m_timer->start();
+    }
+}
+
+void FrameScroller::stopScrolling()
+{
+    m_timer->stop();
+}
+
+void FrameScroller::scrollStep()
+{
+    m_frame->scroll(qCeil(m_lengthX / 8.0), qCeil(m_lengthY / 8.0));
+}

src/plugins/AutoScroll/framescroller.h

@@ -0,0 +1,49 @@
+/* ============================================================
+* QupZilla - WebKit based browser
+* Copyright (C) 2014  David Rosca <nowrep@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+* ============================================================ */
+#ifndef FRAMESCROLLER_H
+#define FRAMESCROLLER_H
+
+#include <QObject>
+
+class QTimer;
+class QWebFrame;
+
+class FrameScroller : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit FrameScroller(QObject* parent = 0);
+
+    void setFrame(QWebFrame* frame);
+
+    void startScrolling(int lengthX, int lengthY);
+    void stopScrolling();
+
+private slots:
+    void scrollStep();
+
+private:
+    QWebFrame* m_frame;
+    QTimer* m_timer;
+
+    int m_lengthX;
+    int m_lengthY;
+};
+
+#endif // FRAMESCROLLER_H