Replace Boost.Signals with Boost.Signals2

[lyx.git] / src / graphics / GraphicsLoader.cpp

diff --git a/src/graphics/GraphicsLoader.cpp b/src/graphics/GraphicsLoader.cpp
index 36f2839446bbd12f5e0e4cc4b9cf9860f217e438..1fa5c65019a7fe687a9cc4024eb1cf1e1b8c6896 100644 (file)
--- a/src/graphics/GraphicsLoader.cpp
+++ b/src/graphics/GraphicsLoader.cpp
@@ -22,8 +22,9 @@
 
 #include "support/bind.h"
 
-#include <set>
 #include <queue>
+#include <memory>
+#include <set>
 
 using namespace std;
 using namespace lyx::support;
@@ -71,12 +72,13 @@ private:
 };
 
 
-//static int s_numimages_ = 5;
-//static int s_millisecs_ = 500;
 
-static int s_numimages_ = 10;
-static int s_millisecs_ = 500;
+//static int const s_numimages_ = 5;
+static int const s_numimages_ = 10;
+static int const s_millisecs_ = 500;
+
 
+// FIXME THREAD
 LoaderQueue & LoaderQueue::get()
 {
        static LoaderQueue singleton;
@@ -89,18 +91,17 @@ void LoaderQueue::loadNext()
        LYXERR(Debug::GRAPHICS, "LoaderQueue: "
                << cache_queue_.size() << " items in the queue");
        int counter = s_numimages_;
-       while (cache_queue_.size() && counter--) {
+       while (!cache_queue_.empty() && counter--) {
                Cache::ItemPtr ptr = cache_queue_.front();
                cache_set_.erase(ptr);
                cache_queue_.pop_front();
                if (ptr->status() == WaitingToLoad)
                        ptr->startLoading();
        }
-       if (!cache_queue_.empty()) {
+       if (!cache_queue_.empty())
                startLoader();
-       } else {
+       else
                stopLoader();
-       }
 }
 
 
@@ -159,9 +160,9 @@ void LoaderQueue::touch(Cache::ItemPtr const & item)
 //
 /////////////////////////////////////////////////////////////////////
 
-typedef shared_ptr<Image> ImagePtr;
+typedef std::shared_ptr<Image> ImagePtr;
 
-class Loader::Impl : public boost::signals::trackable {
+class Loader::Impl : public boost::signals2::trackable {
 public:
        ///
        Impl();
@@ -187,9 +188,18 @@ public:
        /// We modify a local copy of the image once it is loaded.
        ImagePtr image_;
        /// This signal is emitted when the image loading status changes.
-       boost::signal<void()> signal_;
+       boost::signals2::signal<void()> signal_;
        /// The connection of the signal StatusChanged  
-       boost::signals::connection sc_;
+       boost::signals2::connection sc_;
+
+       double displayPixelRatio() const
+       {
+               return params_.pixel_ratio;
+       }
+       void setDisplayPixelRatio(double scale)
+       {
+               params_.pixel_ratio = scale;
+       }
 
 private:
        ///
@@ -273,7 +283,7 @@ void Loader::reset(Params const & params) const
 
 void Loader::startLoading() const
 {
-       if (pimpl_->status_ != WaitingToLoad || !pimpl_->cached_item_.get())
+       if (pimpl_->status_ != WaitingToLoad || !pimpl_->cached_item_)
                return;
        pimpl_->startLoading();
 }
@@ -287,7 +297,7 @@ void Loader::reload() const
 
 void Loader::startMonitoring() const
 {
-       if (!pimpl_->cached_item_.get())
+       if (!pimpl_->cached_item_)
                return;
 
        pimpl_->cached_item_->startMonitoring();
@@ -296,7 +306,7 @@ void Loader::startMonitoring() const
 
 bool Loader::monitoring() const
 {
-       if (!pimpl_->cached_item_.get())
+       if (!pimpl_->cached_item_)
                return false;
 
        return pimpl_->cached_item_->monitoring();
@@ -305,7 +315,7 @@ bool Loader::monitoring() const
 
 unsigned long Loader::checksum() const
 {
-       if (!pimpl_->cached_item_.get())
+       if (!pimpl_->cached_item_)
                return 0;
 
        return pimpl_->cached_item_->checksum();
@@ -315,7 +325,7 @@ unsigned long Loader::checksum() const
 FileName const & Loader::filename() const
 {
        static FileName const empty;
-       return pimpl_->cached_item_.get() ?
+       return pimpl_->cached_item_ ?
                pimpl_->cached_item_->filename() : empty;
 }
 
@@ -326,7 +336,19 @@ ImageStatus Loader::status() const
 }
 
 
-boost::signals::connection Loader::connect(slot_type const & slot) const
+double Loader::displayPixelRatio() const
+{
+       return pimpl_->displayPixelRatio();
+}
+
+
+void Loader::setDisplayPixelRatio(double scale)
+{
+       pimpl_->setDisplayPixelRatio(scale);
+}
+
+
+boost::signals2::connection Loader::connect(slot_type const & slot) const
 {
        return pimpl_->signal_.connect(slot);
 }
@@ -352,7 +374,7 @@ Loader::Impl::~Impl()
 
 void Loader::Impl::resetFile(FileName const & file)
 {
-       FileName const old_file = cached_item_.get() ?
+       FileName const old_file = cached_item_ ?
                cached_item_->filename() : FileName();
 
        if (file == old_file)
@@ -375,10 +397,10 @@ void Loader::Impl::resetFile(FileName const & file)
                }
        }
 
-       status_ = cached_item_.get() ? cached_item_->status() : WaitingToLoad;
+       status_ = cached_item_ ? cached_item_->status() : WaitingToLoad;
        image_.reset();
 
-       if (cached_item_.get() || file.empty())
+       if (cached_item_ || file.empty())
                return;
 
        Cache & gc = Cache::get();
@@ -402,14 +424,14 @@ void Loader::Impl::resetParams(Params const & params)
                return;
 
        params_ = params;
-       status_ = cached_item_.get() ? cached_item_->status() : WaitingToLoad;
+       status_ = cached_item_ ? cached_item_->status() : WaitingToLoad;
        image_.reset();
 }
 
 
 void Loader::Impl::statusChanged()
 {
-       status_ = cached_item_.get() ? cached_item_->status() : WaitingToLoad;
+       status_ = cached_item_ ? cached_item_->status() : WaitingToLoad;
        createPixmap();
        signal_();
 }
@@ -420,7 +442,7 @@ void Loader::Impl::createPixmap()
        if (!params_.display || status_ != Loaded)
                return;
 
-       if (!cached_item_.get()) {
+       if (!cached_item_) {
                LYXERR(Debug::GRAPHICS, "pixmap not cached yet");
                return;
        }
@@ -433,6 +455,16 @@ void Loader::Impl::createPixmap()
 
        image_.reset(cached_item_->image()->clone());
 
+       if (params_.pixel_ratio == 1.0) {
+               string filename = cached_item_->filename().absFileName();
+               size_t idx = filename.find_last_of('.');
+               if (idx != string::npos && idx > 3) {
+                       if (filename.substr(idx - 3, 3) == "@2x") {
+                               params_.pixel_ratio = 2.0;
+                       }
+               }
+       }
+
        bool const success = image_->setPixmap(params_);
 
        if (success) {