refactor: add code for work in Qt5.5

.travis/build-ubuntu-14-04.sh

@@ -19,8 +19,8 @@
 # stop as soon as one of steps will fail
 set -e -o pipefail
 
-# Qt 5.6, since that's the lowest supported version
-sudo add-apt-repository -y ppa:beineri/opt-qt562-trusty
+# Qt 5.5, since that's the lowest supported version
+sudo add-apt-repository -y ppa:beineri/opt-qt551-trusty
 sudo apt-get update -qq
 
 # install needed Qt, OpenAL, opus, qrencode, GTK tray deps, sqlcipher
@@ -42,15 +42,15 @@ sudo apt-get install -y --force-yes \
     libtool \
     libvpx-dev \
     libxss-dev qrencode \
-    qt56base \
-    qt56script \
-    qt56svg \
-    qt56tools \
-    qt56xmlpatterns \
+    qt55base \
+    qt55script \
+    qt55svg \
+    qt55tools \
+    qt55xmlpatterns \
     pkg-config || yes
 
 # Qt
-source /opt/qt56/bin/qt56-env.sh || yes
+source /opt/qt55/bin/qt55-env.sh || yes
 
 # ffmpeg
 if [ ! -e "libs" ]; then mkdir libs; fi

src/widget/form/genericchatform.cpp

@@ -600,6 +600,7 @@ bool GenericChatForm::searchInText(const QString& phrase, const ParameterSearch&
             startLine = static_cast<int>(std::distance(lines.begin(), find));
         }
     } else if (parameter.period == PeriodSearch::BeforeDate) {
+#if QT_VERSION > QT_VERSION_CHECK(5, 6, 0)
         const auto lambda = [=](const ChatLine::Ptr& item) {
             const auto d = getDate(item);
             return d.isValid() && parameter.date >= d;
@@ -610,6 +611,15 @@ bool GenericChatForm::searchInText(const QString& phrase, const ParameterSearch&
         if (find != lines.rend()) {
             startLine = static_cast<int>(std::distance(find, lines.rend())) - 1;
         }
+#else
+        for (int i = lines.size() - 1; i >= 0; --i) {
+            auto d = getDate(lines[i]);
+            if (d.isValid() && parameter.date >= d) {
+                startLine = i;
+                break;
+            }
+        }
+#endif
     }
 
     if (startLine < 0 || startLine >= numLines) {