if can have a variable test or a content check

bootstrap.sh

@@ -845,7 +845,7 @@ if testtag AX_USE_DOXYGEN; then
         doxyreplace PROJECT_NAME "@PACKAGE_NAME@"
         doxyreplace PROJECT_NUMBER "@PACKAGE_VERSION@"
         doxyreplace PROJECT_BRIEF "@DESCRIPTION@"
-        doxyreplace PROJECT_LOGO "@top_srcdir@/@PACKACE_LOGO@"
+        doxyreplace PROJECT_LOGO "@top_srcdir@/@PACKAGE_LOGO@"
         doxyreplace INLINE_INHERITED_MEMB YES
         doxyreplace MULTILINE_CPP_IS_BRIEF YES
         doxyreplace TAB_SIZE 2

src/commands.hxx

@@ -2084,16 +2084,28 @@ class If: public Command {
         "  <command3>\n"
         "  <command4>\n"
         "  <...>\n"
+        "\n\n"+
+        tag()+" <selector> -> <text>\n"
+        "  <command1>\n"
+        "  <command2>\n"
+        "  <...>\n"
+        "else\n"
+        "  <command3>\n"
+        "  <command4>\n"
+        "  <...>\n"
         "\n\n"
         "Execute commands conditionally. "
+        "The first variant compares a variable to a value. "
         "The comparision <cmp> can be = ^ . ~ < >, "
         "which means equal, different, contains, match, "
         "less (as integer), bigger (as integer). "
         "Match allows a regular expression. "
+        "The second variant checks for a text in a selector, "
+        "similar to command exists. "
         "There is an optional else part.";
     }
     QString command() const {
-      return tag()+" "+_variable+" "+QString(_cmp)+" "+_value
+      return tag()+" "+_variable+" "+_cmp+" "+_value
         +(_script.get()?"\n"+_script->print().join("\n  "):"");
     }
     std::shared_ptr<Command> parse(Script*, QString args,
@@ -2101,10 +2113,17 @@ class If: public Command {
                                    int indent) {
       std::shared_ptr<If> cmd(new If());
       int pos(args.indexOf(QRegularExpression("[=^.~<>]")));
-      if (pos<0) throw BadArgument(tag()+" needs a comparision, not: "+args);
+      int len(1);
+      if (args.contains("->")) {
+        pos = args.indexOf("->");
+        len = 2;
+        cmd->_cmp = "->";
+      } else {
+        if (pos<0) throw BadArgument(tag()+" needs a comparision, not: "+args);
+        cmd->_cmp = args[pos];
+      }
       cmd->_variable = args.left(pos).trimmed();
-      cmd->_cmp = args[pos].toLatin1();
-      cmd->_value = args.mid(pos+1).trimmed();
+      cmd->_value = args.mid(pos+len).trimmed();
       cmd->_script = std::shared_ptr<Script>(new Script);
       cmd->_script->parse(subCommandBlock(in), file, line+1, indent+1);
       if (in.size() && in.first().contains(QRegularExpression("^else *$"))) {
@@ -2117,32 +2136,46 @@ class If: public Command {
     bool execute(Script* script, QWebFrame* frame) {
       Logger log(this, script, false);
       QString value(script->replacevars(_value));
+      QString selector(script->replacevars(_variable));
       bool check(false);
-      switch (_cmp) {
-        case '=': check = script->variable(_variable)==value;
-          break;
-        case '^': check = script->variable(_variable)!=value;
-          break;
-        case '.': check = script->variable(_variable).contains(value);
-          break;
-        case '~': check =
-            script->variable(_variable).contains(QRegularExpression(value));
-          break;
-        case '<': check = script->variable(_variable).toInt()<value.toInt();
-          break;
-        case '>': check = script->variable(_variable).toInt()>value.toInt();
-          break;
-        default:;
+      if (_cmp=="->") {
+        Q_FOREACH(QWebElement element, frame->findAllElements(selector)) {
+          if (value.isEmpty() || // just find element
+              element.toOuterXml().indexOf(value)!=-1 ||
+              element.toPlainText().indexOf(value)!=-1) {
+            check = true;
+            break;
+          }
+        }
+        log(QString("evaluated expression to ")+(check?"true":"false")+": "
+            +selector+" "+_cmp+" "+value);
+      } else {
+        switch (_cmp[0].toLatin1()) {
+          case '=': check = script->variable(_variable)==value;
+            break;
+          case '^': check = script->variable(_variable)!=value;
+            break;
+          case '.': check = script->variable(_variable).contains(value);
+            break;
+          case '~': check =
+              script->variable(_variable).contains(QRegularExpression(value));
+            break;
+          case '<': check = script->variable(_variable).toInt()<value.toInt();
+            break;
+          case '>': check = script->variable(_variable).toInt()>value.toInt();
+            break;
+          default:;
+        }
+        log(QString("evaluated expression to ")+(check?"true":"false")+":"
+            +script->variable(_variable)+" "+_cmp+" "+value);
       }
-      log("evaluated expression: "+script->variable(_variable)
-          +" "+_cmp+" "+value);
       if (check) return runScript(this, _script, script, frame);
       else if (_else) return runScript(this, _else, script, frame);
       return true;
     }
   private:
     QString _variable;
-    char _cmp;
+    QString _cmp;
     QString _value;
     std::shared_ptr<Script> _script;
     std::shared_ptr<Script> _else;