windowrules: add negative: prefix for negating a regex

fixes #8799

src/desktop/LayerRule.hpp

@@ -2,12 +2,7 @@
 
 #include <string>
 #include <cstdint>
-#include <memory>
-
-//NOLINTNEXTLINE
-namespace re2 {
-    class RE2;
-};
+#include "Rule.hpp"
 
 class CLayerRule {
   public:
@@ -27,10 +22,10 @@ class CLayerRule {
         RULE_ZUMBA,
     };
 
-    eRuleType                 ruleType = RULE_INVALID;
+    eRuleType           ruleType = RULE_INVALID;
 
-    const std::string         targetNamespace;
-    const std::string         rule;
+    const std::string   targetNamespace;
+    const std::string   rule;
 
-    std::unique_ptr<re2::RE2> rTargetNamespaceRegex;
+    CRuleRegexContainer targetNamespaceRegex;
 };

src/desktop/Rule.cpp

@@ -0,0 +1,16 @@
+#include "Rule.hpp"
+#include <re2/re2.h>
+
+CRuleRegexContainer::CRuleRegexContainer(const std::string& regex_) {
+    const bool NEGATIVE = regex_.starts_with("negative:");
+
+    negative = NEGATIVE;
+    regex    = std::make_unique<RE2>(NEGATIVE ? regex_.substr(9) : regex_);
+}
+
+bool CRuleRegexContainer::passes(const std::string& str) const {
+    if (!regex)
+        return false;
+
+    return RE2::FullMatch(str, *regex) != negative;
+}

src/desktop/Rule.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <memory>
+
+//NOLINTNEXTLINE
+namespace re2 {
+    class RE2;
+};
+
+class CRuleRegexContainer {
+  public:
+    CRuleRegexContainer() = default;
+
+    CRuleRegexContainer(const std::string& regex);
+
+    bool passes(const std::string& str) const;
+
+  private:
+    std::unique_ptr<re2::RE2> regex;
+    bool                      negative = false;
+};

src/desktop/WindowRule.hpp

@@ -2,12 +2,7 @@
 
 #include <string>
 #include <cstdint>
-#include <memory>
-
-//NOLINTNEXTLINE
-namespace re2 {
-    class RE2;
-};
+#include "Rule.hpp"
 
 class CWindowRule {
   public:
@@ -65,9 +60,9 @@ class CWindowRule {
     std::string       szWorkspace       = ""; // empty means any
 
     // precompiled regexes
-    std::unique_ptr<re2::RE2> rTitle;
-    std::unique_ptr<re2::RE2> rClass;
-    std::unique_ptr<re2::RE2> rInitialTitle;
-    std::unique_ptr<re2::RE2> rInitialClass;
-    std::unique_ptr<re2::RE2> rV1Regex;
+    CRuleRegexContainer rTitle;
+    CRuleRegexContainer rClass;
+    CRuleRegexContainer rInitialTitle;
+    CRuleRegexContainer rInitialClass;
+    CRuleRegexContainer rV1Regex;
 };