Generalize previews: Add PreviewGenerator*

gui/previewgeneratormapfunctor.cpp

@@ -0,0 +1,44 @@
+#include "previewgeneratormapfunctor.h"
+#include "previewgeneratorpdf.h"
+
+PreviewGeneratorMapFunctor::PreviewGeneratorMapFunctor()
+{
+	generator[GeneratorIndex::PDF] = new PreviewGeneratorPdf();
+}
+
+PreviewGenerator *PreviewGeneratorMapFunctor::getGenerator(QString filePath)
+{
+	/* Dirty, but that's all we have at this point */
+	if(filePath.endsWith(".pdf"))
+	{
+		return generator[GeneratorIndex::PDF];
+	}
+	return nullptr;
+}
+
+PreviewGeneratorMapFunctor::~PreviewGeneratorMapFunctor()
+{
+	for(int i = GeneratorIndex::PDF; i < GeneratorIndex::LAST_DUMMY; i++)
+	{
+		// delete generator[i];
+		generator[i] = nullptr;
+	}
+}
+
+void PreviewGeneratorMapFunctor::setRenderConfig(RenderConfig config)
+{
+	this->renderConfig = config;
+}
+
+QSharedPointer<PreviewResult> PreviewGeneratorMapFunctor::operator()(const QSharedPointer<PreviewResult> &renderResult)
+{
+	PreviewGenerator *previewGenerator = getGenerator(renderResult->getDocumentPath());
+	if(previewGenerator == nullptr)
+	{
+		return QSharedPointer<PreviewResult>();
+	}
+	auto preview =
+		previewGenerator->generate(this->renderConfig, renderResult->getDocumentPath(), renderResult->getPage());
+
+	return QSharedPointer<PreviewResult>(preview);
+}