Add trace messages

src/correct/corrector.cpp

@@ -47,8 +47,10 @@ void Corrector::correct(const TaskPtr &task)
 
   task->corrected = task->recognized;
 
-  if (!settings_.userSubstitutions.empty())
+  if (!settings_.userSubstitutions.empty()) {
     task->corrected = substituteUser(task->recognized, task->sourceLanguage);
+    LTRACE() << "Corrected with user data";
+  }
 
   if (task->useHunspell) {
     emit correctAuto(task);

src/correct/correctorworker.cpp

@@ -13,9 +13,11 @@ void CorrectorWorker::handle(const TaskPtr &task)
   SOFT_ASSERT(task->isValid(), return );
   SOFT_ASSERT(!hunspellDir_.isEmpty(), return );
 
+  LTRACE() << "Start hunspell correction" << task->sourceLanguage;
   auto result = task;
 
   if (!bundles_.count(task->sourceLanguage)) {
+    LTRACE() << "Create hunspell engine" << task->sourceLanguage;
     auto engine =
         std::make_unique<HunspellCorrector>(task->sourceLanguage, hunspellDir_);
 
@@ -27,6 +29,7 @@ void CorrectorWorker::handle(const TaskPtr &task)
     }
 
     bundles_.emplace(task->sourceLanguage, Bundle{std::move(engine), 0});
+    LTRACE() << "Added hunspell engine" << task->sourceLanguage;
   }
 
   auto &bundle = bundles_[task->sourceLanguage];
@@ -49,6 +52,7 @@ void CorrectorWorker::reset(const QString &hunspellDir)
 
   hunspellDir_ = hunspellDir;
   bundles_.clear();
+  LTRACE() << "Cleared hunspell engines";
 }
 
 void CorrectorWorker::removeUnused(Generation current)
@@ -60,7 +64,9 @@ void CorrectorWorker::removeUnused(Generation current)
     if (it->second.usesLeft >= 0) {
       ++it;
     } else {
+      const auto name = it->first;
       it = bundles_.erase(it);
+      LTRACE() << "Removed unused hunspell engine" << name;
     }
   }
 }

src/correct/hunspellcorrector.cpp

@@ -93,10 +93,12 @@ void HunspellCorrector::init(const QString &path)
 
   engine_ =
       std::make_unique<Hunspell>(qPrintable(aff), qPrintable(dics.first()));
+  LTRACE() << "Created hunspell instance";
 
   dics.pop_front();
   if (!dics.isEmpty()) {
     for (const auto &dic : dics) engine_->add_dic(qPrintable(dic));
+    LTRACE() << "Loaded hunspell dicts" << dics;
   }
 }
 

src/ocr/recognizerworker.cpp

@@ -11,9 +11,12 @@ void RecognizeWorker::handle(const TaskPtr &task)
   SOFT_ASSERT(task->isValid(), return );
   SOFT_ASSERT(!tessdataPath_.isEmpty(), return );
 
+  LTRACE() << "Start recognize" << task->captured;
   auto result = task;
 
   if (!engines_.count(task->sourceLanguage)) {
+    LTRACE() << "Create OCR engine" << task->sourceLanguage;
+
     auto engine =
         std::make_unique<Tesseract>(task->sourceLanguage, tessdataPath_);
 
@@ -24,6 +27,7 @@ void RecognizeWorker::handle(const TaskPtr &task)
     }
 
     engines_.emplace(task->sourceLanguage, std::move(engine));
+    LTRACE() << "Added OCR engine" << task->sourceLanguage;
   }
 
   auto &engine = engines_[task->sourceLanguage];
@@ -46,6 +50,7 @@ void RecognizeWorker::reset(const QString &tessdataPath)
 
   tessdataPath_ = tessdataPath;
   engines_.clear();
+  LTRACE() << "Cleared OCR engines";
 }
 
 void RecognizeWorker::removeUnused(Generation current)
@@ -58,6 +63,7 @@ void RecognizeWorker::removeUnused(Generation current)
       continue;
     }
     engines_.erase(it->first);
+    LTRACE() << "Removed unused OCR engine" << it->first;
     it = lastGenerations_.erase(it);
   }
 }

src/ocr/tesseract.cpp

@@ -98,18 +98,22 @@ static Pix *prepareImage(const QImage &image)
   auto gray = pixConvertRGBToGray(pix, 0.0, 0.0, 0.0);
   SOFT_ASSERT(gray, return nullptr);
   pixDestroy(&pix);
+  LTRACE() << "Removed original Pix";
 
   auto scaleSource = gray;
   auto scaled = scaleSource;
 
   if (const auto scale = getScale(scaleSource); scale > 1.0) {
     scaled = pixScale(scaleSource, scale, scale);
+    LTRACE() << "Scaled Pix for OCR" << LARG(scale) << LARG(scaled);
     if (!scaled)
       scaled = scaleSource;
   }
 
-  if (scaled != scaleSource)
+  if (scaled != scaleSource) {
     pixDestroy(&scaleSource);
+    LTRACE() << "Removed unscaled Pix";
+  }
 
   return scaled;
 }
@@ -184,13 +188,17 @@ QString Tesseract::recognize(const QPixmap &source)
 
   Pix *image = prepareImage(source.toImage());
   SOFT_ASSERT(image != NULL, return {});
+  LTRACE() << "Preprocessed Pix for OCR";
   engine_->SetImage(image);
   char *outText = engine_->GetUTF8Text();
+  LTRACE() << "Received recognized text";
   engine_->Clear();
   cleanupImage(&image);
+  LTRACE() << "Cleared preprocessed Pix";
 
   QString result = QString(outText).trimmed();
   delete[] outText;
+  LTRACE() << "Cleared recognized text buffer";
 
   if (result.isEmpty())
     error_ = QObject::tr("Failed to recognize text or no text selected");

src/translate/translator.cpp

@@ -103,6 +103,7 @@ void Translator::translate(const TaskPtr &task)
   SOFT_ASSERT(task, return );
 
   if (task->corrected.isEmpty()) {
+    LTRACE() << "Corrected text is empty. Skipping translation";
     manager_.translated(task);
     return;
   }
@@ -177,6 +178,7 @@ void Translator::createPage(const QString &scriptName,
 
   SOFT_ASSERT(log->document(), return )
   log->document()->setMaximumBlockCount(1000);
+  LTRACE() << "Created page" << LARG(scriptName);
 }
 
 void Translator::showDebugView()
@@ -279,6 +281,7 @@ void Translator::processQueue()
       pages_[translator]->start(task);
       task->translators.removeOne(translator);
       idlePages.erase(translator);
+      LTRACE() << "Started translation at" << translator << task;
       break;
     }
   }