Ground work for Settings/Preferences

Core interface to expose toggling some of the WebPreferences
for now and most probably some of the WebRuntimeFeatures soon.

The whole dummy settings business is meant to keep things
from breaking too much when bisecting, because it is assumed
that there are always valid settings for a given adapterClient.

Change-Id: Ic0a62bcb5af8c0254436dc770b43cde5016c3bbd
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>

1 files changed, 141 insertions, 0 deletions

diff --git a/src/core/web_engine_settings.h b/src/core/web_engine_settings.h
new file mode 100644
index 000000000..5e19c242d
--- /dev/null
+++ b/src/core/web_engine_settings.h
@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef WEB_ENGINE_SETTINGS_H
+#define WEB_ENGINE_SETTINGS_H
+
+#include "qtwebenginecoreglobal.h"
+
+#include <QExplicitlySharedDataPointer>
+#include <QScopedPointer>
+#include <QHash>
+#include <QUrl>
+
+class BatchTimer;
+class WebContentsAdapter;
+class WebEngineSettings;
+struct WebPreferences;
+
+class QWEBENGINE_EXPORT WebEngineSettingsDelegate {
+public:
+    virtual ~WebEngineSettingsDelegate() {}
+    virtual void apply() = 0;
+    // Needs to be a valid pointer, the last available fallback (ex: global settings) should return itself.
+    virtual WebEngineSettings *fallbackSettings() const = 0;
+};
+
+class QWEBENGINE_EXPORT WebEngineSettings {
+public:
+    // Attributes. Names match the ones from the public widgets API.
+    enum Attribute {
+        UnsupportedInCoreSettings = -1,
+        AutoLoadImages,
+        JavascriptEnabled,
+        JavascriptCanOpenWindows,
+        JavascriptCanAccessClipboard,
+        LinksIncludedInFocusChain,
+        LocalStorageEnabled,
+        LocalContentCanAccessRemoteUrls,
+        XSSAuditingEnabled,
+        SpatialNavigationEnabled,
+        LocalContentCanAccessFileUrls,
+        HyperlinkAuditingEnabled,
+        ScrollAnimatorEnabled,
+    };
+
+    // Must match the values from the public API in qwebenginesettings.h.
+    enum FontFamily {
+        StandardFont,
+        FixedFont,
+        SerifFont,
+        SansSerifFont,
+        CursiveFont,
+        FantasyFont
+    };
+
+    // Must match the values from the public API in qwebenginesettings.h.
+    enum FontSize {
+        MinimumFontSize,
+        MinimumLogicalFontSize,
+        DefaultFontSize,
+        DefaultFixedFontSize
+    };
+
+    WebEngineSettings(WebEngineSettingsDelegate*);
+    WebEngineSettings(WebEngineSettingsDelegate *,WebContentsAdapter *);
+    virtual ~WebEngineSettings();
+
+    void overrideWebPreferences(WebPreferences *prefs);
+
+    void setAttribute(Attribute, bool on);
+    bool testAttribute(Attribute) const;
+    void resetAttribute(Attribute);
+
+    void setFontFamily(FontFamily, const QString &);
+    QString fontFamily(FontFamily);
+    void resetFontFamily(FontFamily);
+
+    void setFontSize(FontSize type, int size);
+    int fontSize(FontSize type) const;
+    void resetFontSize(FontSize type);
+
+    void setDefaultTextEncoding(const QString &encoding);
+    QString defaultTextEncoding() const;
+
+    void initDefaults();
+    void scheduleApply();
+
+private:
+    void doApply();
+    void applySettingsToWebPreferences(WebPreferences *);
+
+    WebContentsAdapter* m_adapter;
+    WebEngineSettingsDelegate* m_delegate;
+    QHash<Attribute, bool> m_attributes;
+    QHash<FontFamily, QString> m_fontFamilies;
+    QHash<FontSize, int> m_fontSizes;
+    QString m_defaultEncoding;
+    QScopedPointer<WebPreferences> webPreferences;
+    QScopedPointer<BatchTimer> m_batchTimer;
+
+    friend class BatchTimer;
+};
+
+#endif // WEB_ENGINE_SETTINGS_H