Adding domain-specific hiding support to the adblocker.

The domain-specific rules are stored in a QMultiHash, where the key
is the domain and the values are the rules for the specified domain.
This causes redundancy, because on rule can be applied to more than
one domain, but has a really fast look-up time.
The code for the generic hiding has not changed and is just relocated.

REVIEW: 111521
REVIEWED-BY: adjam

1 files changed, 132 insertions, 0 deletions

diff --git a/src/adblock/adblockelementhiding.cpp b/src/adblock/adblockelementhiding.cpp
new file mode 100644
index 00000000..442e652c
--- /dev/null
+++ b/src/adblock/adblockelementhiding.cpp
@@ -0,0 +1,132 @@
+/* ============================================================
+*
+* This file is a part of the rekonq project
+*
+* Copyright (C) 2013 by Paul Rohrbach <p.b.r at gmx dot net>
+*
+*
+* 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 2 of
+* the License or (at your option) version 3 or any later version
+* accepted by the membership of KDE e.V. (or its successor approved
+* by the membership of KDE e.V.), which shall act as a proxy
+* defined in Section 14 of version 3 of the license.
+*
+* 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/>.
+*
+* ============================================================ */
+
+
+// Self Includes
+#include "adblockelementhiding.h"
+
+// Rekonq Includes
+#include "rekonq_defines.h"
+
+AdBlockElementHiding::AdBlockElementHiding()
+{
+}
+
+
+bool AdBlockElementHiding::addRule(const QString &rule)
+{
+    if (!rule.contains(QL1S("##")))
+        return false;
+
+    if (rule.startsWith(QL1S("##")))
+    {
+        m_GenericRules.push_back(rule.mid(2));
+        return true;
+    }
+
+    QStringList lst = rule.split(QL1S("##"));
+    QString domainSpecificRule = lst[1];
+
+    QStringList domains = lst[0].split(QL1C(','));
+    Q_FOREACH(QString domain, domains)
+    {
+        if(domain.startsWith(QL1C('~')))
+        {
+            m_DomainSpecificRulesWhitelist.insert(domain.mid(1),
+                                                  domainSpecificRule);
+            continue;
+        }
+
+        m_DomainSpecificRules.insert(domain, domainSpecificRule);
+    }
+
+    return true;
+}
+
+void AdBlockElementHiding::apply(QWebElement &document, QString domain) const
+{
+
+    //first apply generic rules
+    Q_FOREACH(QString rule, m_GenericRules)
+    {
+        applyStringRule(document, rule);
+    }
+
+    //check for whitelisted rules
+    QStringList whiteListedRules;
+    QStringList subdomainList = generateSubdomainList(domain);
+
+    Q_FOREACH(QString d, subdomainList)
+    {
+        whiteListedRules.append(m_DomainSpecificRulesWhitelist.values(d));
+    }
+
+    //apply rules if not whitelisted
+    Q_FOREACH(QString d, subdomainList)
+    {
+        QList<QString> ruleList = m_DomainSpecificRules.values(d);
+        Q_FOREACH(QString rule, ruleList)
+        {
+            if (!whiteListedRules.contains(rule))
+                applyStringRule(document, rule);
+        }
+    }
+}
+
+void AdBlockElementHiding::clear()
+{
+    m_GenericRules.clear();
+    m_DomainSpecificRules.clear();
+    m_DomainSpecificRulesWhitelist.clear();
+}
+
+void AdBlockElementHiding::applyStringRule(QWebElement &document, const QString &rule) const
+{
+    QWebElementCollection elements = document.findAll(rule);
+
+    Q_FOREACH(QWebElement el, elements)
+    {
+        if (el.isNull())
+            continue;
+        kDebug() << "Hide element: " << el.localName();
+        el.removeFromDocument();
+    }
+}
+
+QStringList AdBlockElementHiding::generateSubdomainList(const QString &domain) const
+{
+    QStringList returnList;
+
+    int dotPosition = domain.lastIndexOf(QL1C('.'));
+    dotPosition = domain.lastIndexOf(QL1C('.'), dotPosition - 1);
+    while (dotPosition != -1)
+    {
+        returnList.append(domain.mid(dotPosition + 1));
+        dotPosition = domain.lastIndexOf(QL1C('.'), dotPosition - 1);
+    }
+    returnList.append(domain);
+
+    return returnList;
+}