Show loaded filename in SRAM edit dialog

When loading SRAM contents from a binary file, the filename is now
captured and displayed next to the Load button as "Loaded: filename.bin".
This helps users with multiple SRAMs identify which file was loaded into
each one, addressing feedback from @MatNieuw on issue #184.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: esaruoho

src/com/lushprojects/circuitjs1/client/SRAMElm.java

@@ -32,10 +32,12 @@ class SRAMElm extends ChipElm {
 	int addressBits, dataBits;
 	HashMap<Integer, Integer> map;
 	HashMap<Integer, Integer> initialMap; // saved initial contents for restore on reset
+	String loadedFileName; // remembers the last file loaded via "Load Contents From File"
 	static final int FLAG_RELOAD_ON_RESET = 2;
 	static String contentsOverride = null;
 	TextArea editTextArea;
 	boolean hexTogglePending;
+	static String fileNameOverride = null;
 
 	public SRAMElm(int xx, int yy) {
 	    super(xx, yy);
@@ -139,6 +141,9 @@ public EditInfo getChipEditInfo(int n) {
         	ei.textArea.setVisibleLines(5);
         	String s = (contentsOverride != null) ? contentsOverride : contentsToString();
         	contentsOverride = null;
+		if (fileNameOverride != null)
+		    loadedFileName = fileNameOverride;
+		fileNameOverride = null;
     	    	ei.textArea.setText(s);
     	    	return ei;
             }
@@ -148,7 +153,9 @@ public EditInfo getChipEditInfo(int n) {
             	return ei;
             }
             if (n == 4 && SRAMLoadFile.isSupported()) {
-            	EditInfo ei = new EditInfo("", 0, -1, -1);
+            	EditInfo ei = new EditInfo(
+		    loadedFileName != null ? "Loaded: " + loadedFileName : "",
+		    0, -1, -1);
             	ei.loadFile = new SRAMLoadFile();
             	ei.button = new Button("Load Contents From File");
             	ei.newDialog = true;

src/com/lushprojects/circuitjs1/client/SRAMLoadFile.java

@@ -30,23 +30,26 @@ public final native void handle()
 				@com.lushprojects.circuitjs1.client.EditDialogLoadFile::doErrorCallback(Ljava/lang/String;)("Cannot load: That file is too large!");
 				return;
 			}
-			
+
+			var fileName = oFiles[0].name;
 			var reader = new FileReader();
 			reader.onload = function(e) {
 				var arr = new Uint8Array(reader.result);
 				var str = "0:";
 				for (var i = 0; i < arr.length; i++)
 					str += " " + arr[i];
-				@com.lushprojects.circuitjs1.client.SRAMLoadFile::doLoadCallback(Ljava/lang/String;)(str);
+				@com.lushprojects.circuitjs1.client.SRAMLoadFile::doLoadCallback(Ljava/lang/String;Ljava/lang/String;)(str, fileName);
 			};
-	
+
 			reader.readAsArrayBuffer(oFiles[0]);
 		}
 	}-*/;
-	
-	static public void doLoadCallback(String data) {
+
+	static public void doLoadCallback(String data, String fileName) {
 		SRAMElm.contentsOverride = data;
+		SRAMElm.fileNameOverride = fileName;
 		CirSim.editDialog.resetDialog();
 		SRAMElm.contentsOverride = null;
+		SRAMElm.fileNameOverride = null;
 	}
 }