Added RegExp class for the Blocker

4 files changed, 142 insertions, 67 deletions

diff --git a/src/webengine/blockerrule.cpp b/src/webengine/blockerrule.cpp
index 4146e85..79669b9 100644
--- a/src/webengine/blockerrule.cpp
+++ b/src/webengine/blockerrule.cpp
@@ -28,7 +28,6 @@
 BlockerRule::BlockerRule(QString rule, QObject *parent) :
     QObject(parent)
 {
-    m_rule = rule;
     QString pattern = rule;
 
     // Empty rule or comment
@@ -37,6 +36,12 @@ BlockerRule::BlockerRule(QString rule, QObject *parent) :
         return;
     }
 
+    // Ignore element hiding rules for now
+    if(pattern.contains("##") || pattern.contains("#@#")) {
+        m_type = RuleType::Invalid;
+        return;
+    }
+
     // Exception
     if(pattern.startsWith("@@")) {
         m_exception = true;
@@ -89,13 +94,6 @@ BlockerRule::BlockerRule(QString rule, QObject *parent) :
         pattern.remove(pattern.indexOf("$"), pattern.length());
     }
 
-    // Domain
-    if(pattern.startsWith("||")) {
-        m_type = RuleType::DomainMatch;
-        m_domain = pattern.mid(2, pattern.indexOf("^")-2);
-        return;
-    }
-
     // Regular expression
     if(rule.startsWith("/") && rule.endsWith("/")) {
         m_type = RuleType::RegularExpressionMatch;
@@ -103,39 +101,48 @@ BlockerRule::BlockerRule(QString rule, QObject *parent) :
         return;
     }
 
+    // Domain rules
+    if(pattern.startsWith("||")) {
+        pattern.remove(0, 2);
+        // find the end point for the domain
+        int end = pattern.indexOf(QRegularExpression("(?:[^\\w\\d\\_\\-\\.\\%]|$)"), 0);
+        domainExpression.setPattern(pattern.mid(0, end));
+        pattern.remove(0, end+1);
+    } else if(pattern.startsWith("|") && pattern.endsWith("|")) {
+        pattern.remove(0, 1);
+        pattern.chop(1);
+        domainExpression.setPattern(pattern);
+    } else {
+        domainExpression.setPattern(".*");
+    }
+
     // Regular rule
-    ruleExpression.setPattern(fromWildcardMatch(pattern));
-    m_type = RuleType::WildcardMatch;
+    ruleExpression.setWildcardPattern(pattern);
+    m_type = RuleType::RegularExpressionMatch;
 }
 
 bool BlockerRule::match(const QWebEngineUrlRequestInfo &info)
 {
-    bool shouldBlock = false;
-
     switch (m_type) {
     case RuleType::Invalid:
-        shouldBlock = false;
         break;
 
-    case DomainMatch:
-        if(info.requestUrl().host() == m_domain) {
-            if(matchOptions(info, m_whitelistOptions)) {
-                shouldBlock = false;
-            } else {
+    case RuleType::RegularExpressionMatch:
+        if(domainExpression.match(info.requestUrl().host())) {
+            if(ruleExpression.match(info.requestUrl().toString())) {
+                if(matchOptions(info, m_whitelistOptions)) {
+                    return false;
+                }
                 if(matchOptions(info, m_blacklistOptions)) {
-                    shouldBlock = true;
+                    return true;
                 }
+                return true;
             }
         }
         break;
-
-    case RegularExpressionMatch:
-    case WildcardMatch:
-        shouldBlock = ruleExpression.match(info.requestUrl().toString()).hasMatch();
-        break;
     }
 
-    return shouldBlock;
+    return false;
 }
 
 bool BlockerRule::isValid()
@@ -153,38 +160,7 @@ bool BlockerRule::isException()
 
 QString BlockerRule::toString() const
 {
-    return m_rule;
-}
-
-QString BlockerRule::fromWildcardMatch(const QString &pattern)
-{
-    QString parsed;
-
-    for(int i=0; i<pattern.length(); i++) {
-        const QChar c = pattern.at(i);
-        switch (c.toLatin1()) {
-        case '*':
-            parsed.append(".*");
-            break;
-        case '^':
-            parsed.append("(?:[^\\w\\d\\_\\-\\.\\%]|$)");
-            break;
-        case '|':
-            if(i == 0) {
-                // beginning of string
-                parsed.append('^');
-            } else {
-                // end of string
-                parsed.append('$');
-            }
-            break;
-        default:
-            parsed.append(c);
-            break;
-        }
-    }
-
-    return parsed;
+    return QString("On [%1]: %2 %3").arg(domainExpression.pattern()).arg(ruleExpression.pattern()).arg(QString::number(m_blacklistOptions, 2));
 }
 
 bool BlockerRule::matchOptions(const QWebEngineUrlRequestInfo &info, const RuleOptions &options)
diff --git a/src/webengine/blockerrule.h b/src/webengine/blockerrule.h
index 810de6d..bdb2eb9 100644
--- a/src/webengine/blockerrule.h
+++ b/src/webengine/blockerrule.h
@@ -23,7 +23,7 @@
 
 #include <QObject>
 #include <QUrl>
-#include <QRegularExpression>
+#include "regexp.h"
 #include <QWebEngineUrlRequestInfo>
 
 class BlockerRule : public QObject
@@ -32,9 +32,7 @@ class BlockerRule : public QObject
 public:
     enum RuleType {
         Invalid,
-        DomainMatch,
-        RegularExpressionMatch,
-        WildcardMatch
+        RegularExpressionMatch
     };
 
     enum RuleOption {
@@ -70,16 +68,14 @@ signals:
 public slots:
 
 private:
-    // TODO: subclass QRegularExpression and move this there
-    QString fromWildcardMatch(const QString &pattern);
     bool matchOptions(const QWebEngineUrlRequestInfo &info, const RuleOptions &options);
 
-    QString m_rule;
-
     RuleType m_type;
     bool m_exception = false;
-    QString m_domain;
-    QRegularExpression ruleExpression;
+    QStringList hostsBlacklist;
+    QStringList hostsWhitelist;
+    RegExp domainExpression;
+    RegExp ruleExpression;
 
     RuleOptions m_blacklistOptions;
     RuleOptions m_whitelistOptions;
diff --git a/src/webengine/regexp.cpp b/src/webengine/regexp.cpp
new file mode 100644
index 0000000..4a5878a
--- /dev/null
+++ b/src/webengine/regexp.cpp
@@ -0,0 +1,68 @@
+/** LICENSE ********************************************************************
+ **
+ ** smolbote: yet another qute browser
+ ** Copyright (C) 2017  Xian Nox
+ **
+ ** 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 "regexp.h"
+
+RegExp::RegExp() :
+    QRegularExpression()
+{
+}
+
+bool RegExp::match(const QString &subject, int offset, MatchType matchType, MatchOptions matchOptions) const
+{
+    if(pattern().isEmpty()) {
+        return true;
+    }
+    return QRegularExpression::match(subject, offset, matchType, matchOptions).hasMatch();
+}
+
+void RegExp::setWildcardPattern(const QString &pattern)
+{
+    QString parsed;
+
+    for(int i=0; i<pattern.length(); i++) {
+        const QChar c = pattern.at(i);
+        switch (c.toLatin1()) {
+        case '*':
+            // remove * at the start and end
+            if(i != 0 && i != pattern.length()-1) {
+                parsed.append(".*");
+            }
+            break;
+        case '^':
+            parsed.append("(?:[^\\w\\d\\_\\-\\.\\%]|$)");
+            break;
+        case '|':
+            if(i == 0) {
+                // beginning of string
+                parsed.append('^');
+            } else {
+                // end of string
+                parsed.append('$');
+            }
+            break;
+        default:
+            parsed.append(c);
+            break;
+        }
+    }
+
+    setPattern(parsed);
+}
diff --git a/src/webengine/regexp.h b/src/webengine/regexp.h
new file mode 100644
index 0000000..d66a98d
--- /dev/null
+++ b/src/webengine/regexp.h
@@ -0,0 +1,35 @@
+/** LICENSE ********************************************************************
+ **
+ ** smolbote: yet another qute browser
+ ** Copyright (C) 2017  Xian Nox
+ **
+ ** 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 REGEXP_H
+#define REGEXP_H
+
+#include <QRegularExpression>
+
+class RegExp : public QRegularExpression
+{
+public:
+    explicit RegExp();
+
+    bool match(const QString &subject, int offset=0, MatchType matchType=NormalMatch, MatchOptions matchOptions=NoMatchOption) const;
+    void setWildcardPattern(const QString &pattern);
+};
+
+#endif // REGEXP_H