Establishing app module, adjustments to localization support

locale/en-US.txt

@@ -0,0 +1,32 @@
+# Locale
+locale {
+  id    en-US
+  name  English (United States)
+}
+
+# Main window
+app {
+  title {
+    default     PVB Emulator
+    mixed       {ctrl.number} {ctrl.filename} - {app.title.default}
+    number      {ctrl.number} {app.title.default}
+    rom         {ctrl.filename} - {app.title.default}
+  }
+
+  file {
+    (menu)      File
+    load_rom    Load ROM...
+    exit        Exit
+  }
+
+}
+
+# Emulation core
+core {
+  java              Java
+  linux-x86         Linux (32-bit)
+  linux-x86_64      Linux (64-bit)
+  native            Native
+  windows-x86       Windows (32-bit)
+  windows-x86_64    Windows (64-bit)
+}

locale/en_US.txt

@@ -1,9 +0,0 @@
-# Main window
-app {
-  title {
-    default     PVB Emulator
-    mixed       {ctrl.number} {ctrl.filename} - {app.title.default}
-    number      {ctrl.number} {app.title.default}
-    rom         {ctrl.filename} - {app.title.default}
-  }
-}

makefile

@@ -67,7 +67,8 @@ core:
 .PHONY: desktop
 desktop: clean_desktop
 	@echo "  Compiling Java desktop application"
-	@javac -sourcepath src/desktop -d . -Xlint:unchecked src/desktop/Main.java
+	@javac -sourcepath src/desktop --release 10 -Xlint:unchecked \
+        -d . src/desktop/Main.java
 
 # Build all native modules
 .PHONY: native
@@ -83,17 +84,17 @@ pack:
 	$(eval jarname = "pvbemu_`date +%Y%m%d`.jar")
 	@echo "  Bundling into $(jarname)"
 	@jar -cfe $(jarname) Main *.class \
-        locale native src util vue makefile license.txt
+        app locale native src util vue makefile license.txt
 
 # Delete only Java .class files
 .PHONY: clean_desktop
 clean_desktop:
-	@rm -r -f *.class util vue
+	@rm -r -f *.class app util vue
 
 # Delete everything but the .jar
 .PHONY: clean_most
 clean_most: clean_desktop
-	@rm -f src/desktop/native/vue_NativeVUE.h native/*
+	@rm -f src/desktop/native/vue_NativeVUE.h native/*.dll native/*.so
 
 
 

src/desktop/Main.java

@@ -1,5 +1,5 @@
-import java.util.*;
-import javax.swing.*;
+// Project imports
+import app.*;
 import util.*;
 
 // Desktop application primary class
@@ -7,13 +7,8 @@ public class Main {
 
     // Program entry point
     public static void main(String[] args) {
-        var loc = new Localizer();
-        loc.set(Util.textRead("locale/en_US.txt"));
-        var window = new JFrame();
-        loc.add(window, "app.title.mixed");
-        loc.put(window, "ctrl.filename", "wario.vb");
-        loc.put(window, "ctrl.number", "1");
-        System.out.println(window.getTitle());
+        Util.setSystemLAF();
+        new App();
     }
 
 }

src/desktop/app/App.java

@@ -0,0 +1,113 @@
+package app;
+
+// Java imports
+import java.util.*;
+
+// Project imports
+import util.*;
+
+// Top-level software state manager
+public class App {
+
+    // Instance fields
+    private Localizer.Locale[] locales;   // Language translations
+    private Localizer          localizer; // UI localization manager
+
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    //                             Constructors                              //
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Default constructor
+    public App() {
+
+        // Instance fields
+        localizer = new Localizer();
+
+        // Additional processing
+        initLocales();
+    }
+
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    //                            Public Methods                             //
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Associate a control with the localizer
+    public boolean addControl(Object control, Object key) {
+        return localizer.add(control, key);
+    }
+
+    // Retrieve the currently active locale
+    public Localizer.Locale getLocale() {
+        return localizer.getLocale();
+    }
+
+    // Retrieve a list of registered locales
+    public Localizer.Locale[] listLocales() {
+        var ret = new Localizer.Locale[locales.length];
+        System.arraycopy(locales, 0, ret, 0, locales.length);
+        return ret;
+    }
+
+    // Remove a control from the localizer
+    public boolean removeControl(Object control) {
+        return localizer.remove(control);
+    }
+
+    // Specify a new locale
+    public void setLocale(Localizer.Locale locale) {
+        localizer.setLocale(locale);
+    }
+
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    //                            Private Methods                            //
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Load and parse all locale translations
+    private void initLocales() {
+
+        // Process all locale files
+        var locales = new HashMap<String, Localizer.Locale>();
+        for (String file : Util.listFiles("locale")) {
+
+            // Process the file
+            try {
+                var locale = Localizer.parse(Util.textRead("locale/" + file));
+                String key = locale.id.toLowerCase();
+
+                // Register the locale
+                if (locales.containsKey(key)) throw new RuntimeException(
+                    "Locale with ID '" + locale.id + "' already registered");
+                locales.put(key, locale);
+
+                // The locale matches the one in the config
+                if (key.equals("en-us"))
+                    localizer.setLocale(locale);
+            }
+
+            // Could not process the file
+            catch (Exception e) {
+                System.err.println("Error parsing locale " +
+                    file + ": " + e.getMessage());
+            }
+
+        }
+
+        // Produce the list of registered locales
+        this.locales = locales.values().toArray(
+            new Localizer.Locale[locales.size()]);
+        Arrays.sort(this.locales);
+
+        // Select a default locale
+        if (localizer.getLocale() != null || this.locales.length == 0)
+            return;
+        var locale = locales.get("en-us");
+        localizer.setLocale(locale != null ? locale : this.locales[0]);
+    }
+
+}

src/desktop/util/Localizer.java

@@ -11,8 +11,8 @@ public class Localizer {
 
     // Instance fields
     private HashMap<Object, Object> controls; // Control mapping
-    private HashMap<String, String> messages; // Message dictionary
-    private HashMap<Object, HashMap<String, String>> tags; // Control overrides
+    private Locale                  locale;   // Current message store
+    private HashMap<Object, HashMap<String, String>> tags; // Control messages
 
 
 
@@ -26,124 +26,69 @@ public class Localizer {
 
 
     ///////////////////////////////////////////////////////////////////////////
-    //                             Constructors                              //
+    //                                Classes                                //
     ///////////////////////////////////////////////////////////////////////////
 
-    // Default constructor
-    public Localizer() {
-        controls = new HashMap<Object, Object>();
-        messages = new HashMap<String, String>();
-        tags     = new HashMap<Object, HashMap<String, String>>();
+    // Locale container
+    public static class Locale implements Comparable<Locale> {
+
+        // Public fields
+        public final String id;   // Unique identifier
+        public final String name; // Display name
+
+        // Private fields
+        private HashMap<String, String> messages; // Message dictionary
+
+        // Constructor
+        private Locale(HashMap<String, String> messages) {
+            id            = messages.get("locale.id");
+            this.messages = messages;
+            name          = messages.get("locale.name");
+        }
+
+        // Comparator
+        public int compareTo(Locale o) {
+            return id.compareTo(o.id);
+        }
+
+        // Represent this object as a string
+        public String toString() {
+            return id + " - " + name;
+        }
+
     }
 
 
 
     ///////////////////////////////////////////////////////////////////////////
-    //                            Public Methods                             //
+    //                            Static Methods                             //
     ///////////////////////////////////////////////////////////////////////////
 
-    // Add a control to the collection
-    public boolean add(Object control, Object key) {
-
-        // Error checking
-        if (control == null || key == null)
-            return false;
-
-        // Control takes a single string
-        if (key instanceof String) {
-            if (!(
-                control instanceof AbstractButton ||
-                control instanceof JFrame         ||
-                control instanceof JInternalFrame ||
-                control instanceof JPanel         || // TitledBorder
-                control instanceof JTextComponent
-            )) return false;
-        }
-
-        // Control takes an array of strings
-        else if (key instanceof String[]) {
-            if (!(
-                JCOMBOBOX.getClass().isAssignableFrom(control.getClass())
-            )) return false;
-        }
-
-        // Invalid control type
-        else return false;
-
-        // Add the control to the collection
-        controls.put(control, key);
-        tags    .put(control, new HashMap<String, String>());
-        update();
-        return true;
-    }
-
-    // Remove all controls from being managed
-    public void clearControls() {
-        controls.clear();
-    }
-
-    // Configure a control tag
-    public String put(Object control, String key, String value) {
-        if (controls.get(control) == null || key == null)
-            return null;
-        var tags = this.tags.get(control);
-        key = key.toLowerCase();
-        String ret = value == null ?
-            tags.remove(key) :
-            tags.put(key, value)
-        ;
-        update();
-        return ret;
-    }
-
-    // Configure a dictionary entry
-    public String put(String key, String value) {
-        String ret = value == null ?
-            messages.remove(key) :
-            messages.put(key, value)
-        ;
-        update();
-        return ret;
-    }
-
-    // Remove a control from the collection
-    public boolean remove(Object control) {
-        tags.remove(control);
-        return controls.remove(control) != null;
-    }
-
-    // Specify a message dictionary
-    public void set(String text) {
-
-        // Pre-processing
-        messages.clear();
-        if (text == null) {
-            update();
-            return;
-        }
-
-        // Configure working variables
+    // Parse a text file to produce a Locale object
+    public static Locale parse(String text) {
         var chars = text.replaceAll("\\r\\n?", "\n").toCharArray();
-        int col   = 1; // Current character on the current line
-        int line  = 1; // Current line in the file
+        var ret   = new HashMap<String, String>(); // Output dictionary
         int start = 0; // Position of first character in key or value
         var stack = new Stack<String>(); // Nested key chain
         int state = 0; // Current parsing context
 
         // Process all characters
-        for (int x = 0; x < chars.length; x++, col++) {
+        for (int x = 0, line = 1, col = 1; x < chars.length; x++, col++) {
             char    c     = chars[x];
             boolean end   = x == chars.length - 1;
             String  pos   = line + ":" + col + ": ";
             boolean white = c == ' ' || c == '\t';
 
+            // Processing for newline
+            if (c == '\n') {
+                col = 0;
+                line++;
+            }
+
             // Comment
             if (state == -1) {
-                if (c != '\n' && !end)
-                    continue;
-                col   = 1;
+                if (c == '\n' || end)
                     state = 0;
-                line++;
             }
 
             // Pre-key
@@ -164,11 +109,8 @@ public class Localizer {
                     break;
 
                 // The line is empty
-                if (c == '\n') {
-                    col = 1;
-                    line++;
+                if (c == '\n')
                     continue;
-                }
 
                 // Proceed to key
                 start = x;
@@ -263,9 +205,7 @@ public class Localizer {
                 if (end)
                     x++;
                 String value = new String(chars, start, x - start).trim();
-                col   = 1;
                 state = 0;
-                line++;
 
                 // Open a key group
                 if (value.equals("{")) {
@@ -281,8 +221,7 @@ public class Localizer {
                         case '{' : depth++; continue;
                         case '}' : if (--depth == -1)
                             throw new RuntimeException(
-                                line + ":" + (x - start + y + 1) +
-                                ": Unexpected '}'"
+                                (line - 1) + ": Unexpected '}'"
                             );
                             continue;
                     }
@@ -298,18 +237,118 @@ public class Localizer {
 
                 // Check for duplicate keys
                 String lkey = key.toLowerCase();
-                if (messages.get(lkey) != null) throw new RuntimeException(
+                if (ret.get(lkey) != null) throw new RuntimeException(
                     (line-1)+ ": Key '" + key + "' has already been defined.");
 
                 // Add the pair to the dictionary
-                messages.put(lkey, value);
+                ret.put(lkey, value);
                 stack.pop();
             }
 
         }
 
-        // Update all controls
+        // Perform post-processing error checks
+        if (state != 0 || !stack.empty()) throw new RuntimeException(
+            "Unexpected end of input");
+        if (!ret.containsKey("locale.id")) throw new RuntimeException(
+            "Required key not found: 'locale.id'");
+        if (!ret.containsKey("locale.name")) throw new RuntimeException(
+            "Required key not found: 'locale.name'");
+        return new Locale(ret);
+    }
+
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    //                             Constructors                              //
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Default constructor
+    public Localizer() {
+        controls = new HashMap<Object, Object>();
+        tags     = new HashMap<Object, HashMap<String, String>>();
+    }
+
+    // Parsing constructor
+    public Localizer(String text) {
+        this();
+        setLocale(parse(text));
+    }
+
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    //                            Public Methods                             //
+    ///////////////////////////////////////////////////////////////////////////
+
+    // Add a control to the collection
+    public boolean add(Object control, Object key) {
+
+        // Error checking
+        if (control == null || key == null)
+            return false;
+
+        // Control takes a single string
+        if (key instanceof String) {
+            if (!(
+                control instanceof AbstractButton ||
+                control instanceof JFrame         ||
+                control instanceof JInternalFrame ||
+                control instanceof JPanel         || // TitledBorder
+                control instanceof JTextComponent
+            )) return false;
+        }
+
+        // Control takes an array of strings
+        else if (key instanceof String[]) {
+            if (!(
+                JCOMBOBOX.getClass().isAssignableFrom(control.getClass())
+            )) return false;
+        }
+
+        // Invalid control type
+        else return false;
+
+        // Add the control to the collection
+        controls.put(control, key);
+        tags    .put(control, new HashMap<String, String>());
         update();
+        return true;
+    }
+
+    // Remove all controls from being managed
+    public void clearControls() {
+        controls.clear();
+    }
+
+    // Retrieve the currently loaded locale
+    public Locale getLocale() {
+        return locale;
+    }
+
+    // Configure a control tag
+    public String put(Object control, String key, String value) {
+        if (controls.get(control) == null || key == null)
+            return null;
+        var tags = this.tags.get(control);
+        key = key.toLowerCase();
+        String ret = value == null ?
+            tags.remove(key) :
+            tags.put(key, value)
+        ;
+        update();
+        return ret;
+    }
+
+    // Remove a control from the collection
+    public boolean remove(Object control) {
+        tags.remove(control);
+        return controls.remove(control) != null;
+    }
+
+    // Specify a message dictionary
+    public void setLocale(Locale locale) {
+        this.locale = locale;
     }
 
 
@@ -320,9 +359,13 @@ public class Localizer {
 
     // Process substitutions and escapes on a message for a given key
     private String evaluate(Object control, String key) {
-        String ret = messages.get(key.toLowerCase());
 
-        // The topmost key does not exist in the dictionary
+        // No locale is loaded
+        if (locale == null)
+            return key;
+
+        // Check that the key exists
+        String ret = locale.messages.get(key.toLowerCase());
         if (ret == null)
             return key;
 
@@ -354,7 +397,7 @@ public class Localizer {
                 String lkey  = key.toLowerCase();
                 String value = tags.get(control).get(lkey);
                 if (value == null)
-                    value = messages.get(lkey);
+                    value = locale.messages.get(lkey);
                 if (value == null)
                     value = "\\{" + key + "\\}";
 

src/desktop/util/Util.java

@@ -5,7 +5,9 @@ import java.awt.*;
 import java.awt.event.*;
 import java.awt.image.*;
 import java.io.*;
+import java.net.*;
 import java.nio.charset.*;
+import java.nio.file.*;
 import java.util.*;
 import javax.imageio.*;
 import javax.swing.*;
@@ -53,6 +55,23 @@ public final class Util {
         new BOM(new byte[] { - 1, - 2      }, StandardCharsets.UTF_16LE),
     };
 
+    // Filesystem state manager for the current .jar (if any)
+    private static final FileSystem JARFS;
+
+    // Static initializer
+    static {
+        FileSystem fs = null;
+        try {
+            fs = FileSystems.newFileSystem(
+                new URI("jar:" + Util.class.getProtectionDomain()
+                    .getCodeSource().getLocation().toString()),
+                new HashMap<String, String>(),
+                Util.class.getClassLoader()
+            );
+        } catch (Exception e) { }
+        JARFS = fs;
+    }
+
 
 
     ///////////////////////////////////////////////////////////////////////////
@@ -138,6 +157,34 @@ public final class Util {
         catch (Exception e) { return null; }
     }
 
+    // Produce a list of files contained in a directory
+    // If the directory is not found on disk, looks for it in the .jar
+    public static String[] listFiles(String path) {
+
+        // Check for the directory on disk
+        var file = new File(path);
+        if (file.exists() && file.isDirectory())
+            return file.list();
+
+        // Not executing out of a .jar
+        if (JARFS == null)
+            return null;
+
+        // Check for the directory in the .jar
+        try {
+            var list = Files.list(JARFS.getPath("/" + path)).toArray();
+            var ret  = new String[list.length];
+            for (int x = 0; x < list.length; x++) {
+                path = "/" + ((Path) list[x]).toString();
+                ret[x] = path.substring(path.lastIndexOf("/") + 1);
+            }
+            return ret;
+        } catch (Exception e) { }
+
+        // The directory was not found
+        return null;
+    }
+
     // Produce a WindowListener with a functional interface
     public static WindowListener onClose(OnClose close) {
         return new WindowListener() {
@@ -246,7 +293,7 @@ public final class Util {
         return split;
     }
 
-    // Read a text file, accounting for BOMs and guaranteeing Unix line endings
+    // Read a text file, accounting for BOMs
     public static String textRead(String filename) {
 
         // Read the file
@@ -277,8 +324,8 @@ public final class Util {
             data = temp;
         }
 
-        // Produce a string with LF-style (Unix) line endings
-        return new String(data, set).replaceAll("\\r\\n?", "\n");
+        // Produce a string
+        return new String(data, set);
     }
 
 }