Added TranslatorHelper class.

ScreenTranslator.pro

@@ -10,6 +10,7 @@ greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
 TARGET = ScreenTranslator
 TEMPLATE = app
+CONFIG += c++11
 
 win32{
     RC_FILE = app.rc
@@ -37,7 +38,8 @@ SOURCES += main.cpp\
     ImageProcessing.cpp \
     LanguageHelper.cpp \
     WebTranslator.cpp \
-    WebTranslatorProxy.cpp
+    WebTranslatorProxy.cpp \
+    TranslatorHelper.cpp
 
 HEADERS  += \
     Manager.h \
@@ -52,7 +54,8 @@ HEADERS  += \
     LanguageHelper.h \
     WebTranslator.h \
     WebTranslatorProxy.h \
-    StAssert.h
+    StAssert.h \
+    TranslatorHelper.h
 
 FORMS    += \
     SettingsEditor.ui \
@@ -71,5 +74,8 @@ OTHER_FILES += \
     images/icon.ico \
     README.md \
     uncrustify.cfg\
+    images/README.md \
     translators/google.js \
+    translators/yandex.js \
+    translators/bing.js \
     TODO.md

Settings.h

@@ -25,6 +25,7 @@ namespace settings_names {
   const QString sourceLanguage = "source_language";
   const QString translationLanguage = "translation_language";
   const QString translationTimeout = "translation_timeout";
+  const QString translators = "translators";
 
 }
 
@@ -49,6 +50,7 @@ namespace settings_values {
   const QString sourceLanguage = "auto";
   const QString translationLanguage = "ru";
   const int translationTimeout = 15; // secs
+  const QString translators = "";
 }
 
 #endif // SETTINGS_H

TranslatorHelper.cpp

@@ -0,0 +1,74 @@
+#include <QSettings>
+#include <QDir>
+#include <QFile>
+
+#include "TranslatorHelper.h"
+#include "Settings.h"
+
+TranslatorHelper::TranslatorHelper ()
+  : translatorsDir_ ("translators"), currentIndex_ (0) {
+}
+
+void TranslatorHelper::setEnabledTranslators (const QStringList &enabled) const {
+  QSettings settings;
+  settings.beginGroup (settings_names::translationGroup);
+  settings.setValue (settings_names::translators, enabled.join ("|"));
+}
+
+QStringList TranslatorHelper::possibleTranslators (QStringList &enabled) const {
+#define GET(FIELD) settings.value (settings_names::FIELD, settings_values::FIELD)
+  QSettings settings;
+  settings.beginGroup (settings_names::translationGroup);
+  QStringList exist = QDir (translatorsDir_).entryList (QStringList () << "*.js", QDir::Files);
+  QStringList saved = GET (translators).toString ().split ("|", QString::SkipEmptyParts);
+  QStringList on, off;
+  std::copy_if (saved.begin (), saved.end (), std::back_inserter (on), [&](const QString &i) {
+    return exist.contains (i);
+  });
+  on = on.isEmpty () ? exist : on;
+
+  std::copy_if (exist.begin (), exist.end (), std::back_inserter (off), [&](const QString &i) {
+    return !on.contains (i);
+  });
+
+  enabled = on;
+  return (on + off);
+#undef GET
+}
+
+QStringList TranslatorHelper::enabledTranslatorScripts () const {
+  QStringList enabled;
+  possibleTranslators (enabled);
+  QStringList scripts;
+  foreach (const QString &name, enabled) {
+    QFile f (translatorsDir_ + QDir::separator () + name);
+    if (f.open (QFile::ReadOnly)) {
+      QString script = QString::fromUtf8 (f.readAll ());
+      if (!script.isEmpty ()) {
+        scripts << script;
+      }
+    }
+  }
+  return scripts;
+}
+
+void TranslatorHelper::loadScripts () {
+  scripts_ = enabledTranslatorScripts ();
+}
+
+void TranslatorHelper::newItem () {
+  currentIndex_ = 0;
+}
+
+QString TranslatorHelper::currentScript () const {
+  return (currentIndex_ < scripts_.size () ? scripts_.at (currentIndex_) : QString ());
+}
+
+QString TranslatorHelper::nextScript () {
+  ++currentIndex_;
+  return currentScript ();
+}
+
+bool TranslatorHelper::gotScripts () const {
+  return !scripts_.isEmpty ();
+}

TranslatorHelper.h

@@ -0,0 +1,27 @@
+#ifndef TRANSLATORHELPER_H
+#define TRANSLATORHELPER_H
+
+#include <QStringList>
+
+class TranslatorHelper {
+  public:
+    TranslatorHelper ();
+
+    QStringList possibleTranslators (QStringList &enabled) const;
+    QStringList enabledTranslatorScripts () const;
+
+    void setEnabledTranslators (const QStringList &enabled) const;
+
+    void loadScripts ();
+    void newItem ();
+    QString currentScript () const;
+    QString nextScript ();
+    bool gotScripts () const;
+
+  private:
+    QString translatorsDir_;
+    QStringList scripts_;
+    int currentIndex_;
+};
+
+#endif // TRANSLATORHELPER_H