Add support for plural forms in Qt forms

src/duckstation-qt/CMakeLists.txt

@@ -116,6 +116,7 @@ endif()
 
 set(TS_FILES
   translations/duckstation-qt_de.ts
+  translations/duckstation-qt_en.ts
   translations/duckstation-qt_es.ts
   translations/duckstation-qt_fr.ts
   translations/duckstation-qt_he.ts

src/duckstation-qt/audiosettingswidget.cpp

@@ -83,8 +83,7 @@ void AudioSettingsWidget::updateBufferingLabel()
   }
 
   const float max_latency = AudioStream::GetMaxLatency(HostInterface::AUDIO_SAMPLE_RATE, actual_buffer_size);
-  m_ui.bufferingLabel->setText(tr("Maximum Latency: %1 frames (%2ms)")
+  m_ui.bufferingLabel->setText(tr("Maximum Latency: %n frames (%1ms)", "", actual_buffer_size)
-                                 .arg(actual_buffer_size)
                                  .arg(static_cast<double>(max_latency) * 1000.0, 0, 'f', 2));
 }
 

src/duckstation-qt/duckstation-qt.vcxproj

@@ -286,6 +286,9 @@
   <ItemGroup>
     <QtTs Include="translations\duckstation-qt_de.ts">
       <FileType>Document</FileType>
+    </QtTs>
+	<QtTs Include="translations\duckstation-qt_en.ts">
+      <FileType>Document</FileType>
     </QtTs>
     <QtTs Include="translations\duckstation-qt_es.ts">
       <FileType>Document</FileType>

src/duckstation-qt/duckstation-qt.vcxproj.filters

@@ -180,6 +180,9 @@
   <ItemGroup>
     <QtTs Include="translations\duckstation-qt_de.ts">
       <Filter>translations</Filter>
+    </QtTs>
+	<QtTs Include="translations\duckstation-qt_en.ts">
+      <Filter>translations</Filter>
     </QtTs>
     <QtTs Include="translations\duckstation-qt_es.ts">
       <Filter>translations</Filter>

src/duckstation-qt/emulationsettingswidget.cpp

@@ -121,8 +121,7 @@ void EmulationSettingsWidget::updateRewind()
     System::CalculateRewindMemoryUsage(frames, &ram_usage, &vram_usage);
 
     m_ui.rewindSummary->setText(
-      tr("Rewind for %1 frames, lasting %2 seconds will require up to %3MB of RAM and %4MB of VRAM.")
+      tr("Rewind for %n frame(s), lasting %1 second(s) will require up to %2MB of RAM and %3MB of VRAM.", "", frames)
-        .arg(frames)
         .arg(duration)
         .arg(ram_usage / 1048576)
         .arg(vram_usage / 1048576));

src/duckstation-qt/inputbindingwidgets.cpp

@@ -36,7 +36,7 @@ void InputBindingWidget::updateText()
   if (m_bindings.empty())
     setText(QString());
   else if (m_bindings.size() > 1)
-    setText(tr("%1 bindings").arg(m_bindings.size()));
+    setText(tr("%n bindings", "", m_bindings.size()));
   else
     setText(QString::fromStdString(m_bindings[0]));
 }

src/duckstation-qt/memorycardeditordialog.cpp

@@ -215,7 +215,7 @@ void MemoryCardEditorDialog::updateCardBlocksFree(Card* card)
 {
   card->blocks_free = MemoryCardImage::GetFreeBlockCount(card->data);
   card->blocks_free_label->setText(
-    tr("%1 blocks free%2").arg(card->blocks_free).arg(card->dirty ? QStringLiteral(" (*)") : QString()));
+    tr("%n block(s) free%1", "", card->blocks_free).arg(card->dirty ? QStringLiteral(" (*)") : QString()));
 }
 
 void MemoryCardEditorDialog::setCardDirty(Card* card)

src/duckstation-qt/qthostinterface.cpp

@@ -64,7 +64,7 @@ const char* QtHostInterface::GetFrontendName() const
 
 std::vector<std::pair<QString, QString>> QtHostInterface::getAvailableLanguageList()
 {
-  return {{QStringLiteral("English"), QStringLiteral("")},
+  return {{QStringLiteral("English"), QStringLiteral("en")},
           {QStringLiteral("Deutsch"), QStringLiteral("de")},
           {QStringLiteral("Español"), QStringLiteral("es")},
           {QStringLiteral("Français"), QStringLiteral("fr")},
@@ -129,7 +129,7 @@ void QtHostInterface::installTranslator()
 
   std::string language = GetStringSettingValue("Main", "Language", "");
   if (language.empty())
-    return;
+    language = "en";
 
   const QString path =
     QStringLiteral("%1/translations/duckstation-qt_%3.qm").arg(qApp->applicationDirPath()).arg(language.c_str());

src/duckstation-qt/translations/duckstation-qt_en.ts

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1" language="en_US">
+<context>
+    <name>AudioSettingsWidget</name>
+    <message numerus="yes">
+        <source>Maximum Latency: %n frames (%1ms)</source>
+        <translation>
+            <numerusform>Maximum Latency: %n frame (%1ms)</numerusform>
+            <numerusform>Maximum Latency: %n frames (%1ms)</numerusform>
+        </translation>
+    </message>
+</context>
+<context>
+    <name>EmulationSettingsWidget</name>
+    <message numerus="yes">
+        <source>Rewind for %n frame(s), lasting %1 second(s) will require up to %2MB of RAM and %3MB of VRAM.</source>
+        <translation>
+            <numerusform>Rewind for %n frame, lasting %1 second(s) will require up to %2MB of RAM and %3MB of VRAM.</numerusform>
+            <numerusform>Rewind for %n frames, lasting %1 second(s) will require up to %2MB of RAM and %3MB of VRAM.</numerusform>
+        </translation>
+    </message>
+</context>
+<context>
+    <name>InputBindingWidget</name>
+    <message numerus="yes">
+        <source>%n bindings</source>
+        <translation>
+            <numerusform>%n binding</numerusform>
+            <numerusform>%n bindings</numerusform>
+        </translation>
+    </message>
+</context>
+<context>
+    <name>MemoryCardEditorDialog</name>
+    <message numerus="yes">
+        <source>%n block(s) free%1</source>
+        <translation>
+            <numerusform>%n block free%1</numerusform>
+            <numerusform>%n blocks free%1</numerusform>
+        </translation>
+    </message>
+</context>
+</TS>

src/duckstation-qt/translations/update-and-edit-english.bat

@@ -0,0 +1,10 @@
+@echo off
+
+set "linguist=..\..\..\dep\msvc\qt\5.15.0\msvc2017_64\bin"
+set context=../ ../../core/ ../../frontend-common/ -tr-function-alias translate+=TranslateString -tr-function-alias translate+=TranslateStdString -tr-function-alias QT_TRANSLATE_NOOP+=TRANSLATABLE -pluralonly
+
+"%linguist%\lupdate.exe" %context% -ts duckstation-qt_en.ts
+pause
+
+cd "%linguist%"
+start /B linguist.exe "%~dp0\duckstation-qt_en.ts"